2024-03-28T21:37:23Z
https://dsp.tecnalia.com/oai/request
oai:dsp.tecnalia.com:11556/10
2015-05-06T08:25:04Z
com_11556_1
col_11556_2
Investigation of the Microstructural and Thermoelectric Properties of the (GeTe)0.95(Bi2Te3)0.05 Composition for Thermoelectric Power Generation Applications
Weintraub, Lior
Davidow, Joseph
Tunbridge, Jonathan
Dixon, Richard
Reece, Michael John
Ning, Huanpo
Agote, Iñigo
Gelbstein, Yaniv
In the frame of the current research, the p-type Bi2Te3 doped (GeTe)(0.95)(Bi2Te3)(0.05) alloy composed of hot pressed consolidated submicron structured powder was investigated. The influence of the process parameters (i.e., powder particles size and hot pressing conditions) on both reduction of the lattice thermal conductivity and electronic optimization is described in detail. Very high maximal ZT values of up to similar to 1.6 were obtained and correlated to the microstructural characteristics. Based on the various involved mechanisms, a potential route for further enhancement of the ZT values of the investigated composition is proposed.
2015-05-05
2015-05-05
2014
article
Journal of Nanomaterials, Volume 2014 (2014)
1687-4129
http://hdl.handle.net/11556/10
10.1155/2014/284634
eng
info:eu-repo/grantAgreement/EC/FP7/286503/EU/ An innovative environmentally friendly thermo-electric power generation system for automotive and marine applications that is powered by exhaust waste thermal energy to reduce fuel consumption /POWER DRIVER
openAccess
oai:dsp.tecnalia.com:11556/18
2015-05-13T00:00:13Z
com_11556_1
col_11556_2
Absolute position calculation for a desktop mobile rehabilitation robot based on three optical mouse sensors
Zabaleta, Haritz
Valencia, David
Perry, Joel
Veneman, Jan
Keller, Thierry
ArmAssist is a wireless robot for after stroke upper limb rehabilitation. In this paper, we describe a method based on artificial landmark navigation system. The navigation system is only based in three optical mouse sensors. This enables to build a cheap but reliable position sensor. Two of the sensors are the data source for odometry calculations, and the third optical mouse sensor takes very low resolution pictures of a custom designed mat. These pictures are processed by an optical symbol recognition algorithm which will estimate the orientation of the robot and recognize the landmarks placed on the mat. The data fusion strategy is described to detect the misclassifications of the landmarks in order to fuse only the reliable information. The orientation given by the OSR algorithm is used to improve significantly the odometry and the recognition of the landmarks is used to reference the odometry to a absolute coordinate system
2015-05-12
2015-05-12
2011
conferenceObject
Engineering in Medicine and Biology Society, EMBC, 2011 Annual International Conference of the IEEE
978-1-4244-4122-8
http://hdl.handle.net/11556/18
eng
openAccess
oai:dsp.tecnalia.com:11556/12
2015-06-23T11:27:00Z
com_11556_1
col_11556_2
OBTENCIÓN Y CARACTERIZACIÓN DE ALEACIONES BASADAS EN γ-TiAl MEDIANTE MÉTODOS PULVIMETALÚRGICOS
Lagos, M.A.
Agote, Iñígo
San Juan, José María
En esta tesis doctoral se ha estudiado la obtención y caracterización de aleaciones basadas en γ-TiAl mediante varios métodos pulvimetalúrgicos no convencionales.
Las aleaciones basadas en γ-TiAl son muy interesantes para aplicaciones aeroespaciales debido a su bajo peso y a sus buenas propiedades mecánicas hasta 700-800 ºC. Sin embargo, un gran inconveniente es la dificultad en la fabricación de estas aleaciones por métodos convencionales. En los métodos de fusión, suele existir variabilidad en las propiedades, debido generalmente a las segregaciones de composición que se producen en los lingotes. La pulvimetalurgia presenta una importante ventaja en cuanto al control de la composición.
En este trabajo se estudian tres rutas tecnológicas, dos basadas en la síntesis por combustión y otra basada en la sinterización por corriente eléctrica. En general, la principal ventaja de estas técnicas es la reducción del tiempo de procesado y la posibilidad de utilizar polvos elementales, cuyo coste es inferior a los pre-aleados.
Se ha estudiado el efecto de los parámetros de procesado en los diversos métodos y se han optimizado las rutas tecnológicas para obtener la mayor densidad y homogeneidad microestructural posible.
Una vez definidas las condiciones de procesado más interesantes para cada ruta, se ha caracterizado comparativamente la densidad, la microestructura, las fases cristalográficas y las propiedades mecánicas de tracción y fluencia. También se han comparado los valores obtenidos con los de los métodos convencionales.
Por último, se han considerado algunos aspectos ligados al escalado de la sinterización por corriente eléctrica, aspecto importante a la hora de una posible aplicación industrial.
2015-05-11
2015-05-11
2014
doctoralThesis
http://hdl.handle.net/11556/12
spa
openAccess
UPV-EHU
oai:dsp.tecnalia.com:11556/15
2015-06-01T07:12:21Z
com_11556_1
col_11556_2
New strategy for the optimal design and manufacture of high performance milling heads
Bustillo, A.
Plaza, L.M.
Rodriguez, M.
High-performance mechanical-transmission heads are one of the most complex, costly and problematic parts of a
milling machine, owing to the large amount of piping required for transporting fluids and to the high level of mechanical
performance that is required from them. This study proposes a strategy for optimising the design and manufacture of
head bodies by using aluminium alloys and by integrating tubular stainless steel inserts in the casting of the head.
These tubular inserts that are integrated into the aluminium mass are an alternative to cooling conduits currently
made by machine drilling. As demonstrated in the experimental validation of the first prototype, the new method
has created a design that retains the same mechanical performance, increases its reliability and reduces the weight
of the milling machine’s moving parts.
2015-05-12
2015-05-12
2011
article
REVISTA DE METALURGIA, 47 (6) NOVIEMBRE-DICIEMBRE, 462-476, 2011
1988-4222
http://hdl.handle.net/11556/15
10.3989/revmetalm.1101
eng
openAccess
oai:dsp.tecnalia.com:11556/19
2017-02-08T15:25:18Z
com_11556_1
col_11556_2
Development of Protective Clothing against Nanoparticle Based on Electrospun Nanofibers
Faccini, M.
Vaquero-Moralejo, Celina
Amantia, D.
In this paper, the development of efficient protective clothing against nanoparticulate aerosols is presented. Nanofibrous mats of polyamide 6 (PA6) were deposited onto a nonwoven viscose substrate by electrospinning technique. The influence of electrospinning parameters, including solution concentration, viscosity, and conductivity, was studied for the production of nonwovens with controlled fiber diameter showing a size distribution ranging from 66 to 195 nm. By varying several process parameters, textiles with different thickness of the nanofiber layer and thus air permeability were obtained. A hot-press lamination process using a thermoplastic resin as glue was applied to improve the adhesion of the nanofiber layer onto the textile support. After 1500 cycles of repeated compression and torsion, the nanofiber layer was still firmly attached to the support, while mechanical damage is visible in some areas. The penetration of NaCl particles with diameter ranging from 15 to 300 nm through the electrospun textiles was found to be strongly dependent on nanofiber layer thickness. A really thin nanofiber coating provides up to 80% retention of 20 nm size particles and over 50% retention of 200 nm size nanoparticles. Increasing the thickness of the nanofiber mat, the filtration efficiency was increased to over 99% along the whole nanoparticle range. The results obtained highlight the potential of nanofibers in the development of efficient personal protective equipments against nanoparticles.
2015-05-15
2015-05-15
2012
article
Journal of Nanomaterials, Volume 2012 (2012)
1687-4110
http://hdl.handle.net/11556/19
10.1155/2012/892894
eng
openAccess
Hindawi Publishing Corporation
oai:dsp.tecnalia.com:11556/21
2015-09-30T08:57:30Z
com_11556_1
col_11556_2
DTN routing optimised by human routines: the HURRy protocol
Pérez-Sánchez, Susana
Cabero, José María
Urteaga, Iñigo
This paper proposes the HURRy (HUman Routines used for Routing) protocol, which infers and benefits from the social behaviour of nodes in disruptive networking environments. HURRy incorporates the contact duration to the information retrieved from historical encounters among neighbours, so that smarter routing decisions can be made. The specification of HURRy is based on the outcomes of a thorough experiment, which highlighted the importance of distinguishing between short and long contacts and deriving mathematical relations in order to optimally prioritize the available routes to a destination. HURRy introduces a novel and more meaningful rating system to evaluate the quality of each contact and overcome the limitations of other routing approaches in social environments.
2015-06-10
2015-06-10
2015
conferenceObject
Proceedings of the 13th International Conference on Wired & Wireless Internet Communications, LNCS Springer (2015), Wired/Wireless Internet Communications, Vol. 9071, pp 299-312
978-3-319-22572-2
http://hdl.handle.net/11556/21
10.1007/978-3-319-22572-2_22
eng
info:eu-repo/grantAgreement/EC/H2020/645124/EU/Universal, mobile-centric and opportunistic communications architecture/UMOBILE
openAccess
Springer. The final publication is available at link.springer.com
oai:dsp.tecnalia.com:11556/22
2015-06-11T00:00:14Z
com_11556_1
col_11556_2
Interaction of engineered surfaces with the living world: Ion implantation vs. osseointegration
Braceras, I.
Alava, J.I.
Goikoetxea, L.
de Maeztu, M.A.
Onate, J.I.
The reaction of living tissues to foreign materials is a highly complex process that currently is insufficiently understood. Nevertheless, if specific reactions are to be promoted, this understanding is highly valuable and thus a significant research effort is being devoted to this issue. Typically, when a biomaterial is inserted in living tissue, proteins and other bio-molecules will adsorb to the surface. As this protein layer will mediate the interaction of the biomaterial with the living world, the consequent reactions will be highly dependant on this very first stage. Furthermore, different materials, i.e. surfaces, typically elicit a very different tissue response. It is commonly admitted that the primary adsorption depends heavily on the surface chemistry, surface topography and surface physical characteristics. Interactions between surface micro-topography and living cells have been widely studied, but protein specific reactions versus nano-topography have been barely explored. Ion beam modification of surfaces, which affect these key properties, can therefore be (i) a powerful tool to advance in the understanding of these nanoscale phenomena and (ii) useful as an industrial treatment of high value added medical devices. This work will explore the application of ion beam based surface treatments to cause specific reactions in hard tissue regeneration. A variety of in vitro and in vivo results are presented corresponding to ion implantation treatments promoting '' osseointegration '' or intimate binding between the biomaterial and the living tissue, without any soft tissue interlayer, and an overview of the mechanism behind is offered, i.e. among other behaviour of osteoblasts, signalling proteins as the integrins, nanotopographic parameters.
2015-06-10
2015-06-10
2007-08-05
article
Surface and Coatings Technology, Volume 201, Issues 19–20, 5 August 2007, Pages 8091-8098
0257-8972
http://hdl.handle.net/11556/22
10.1016/j.sur-fcoat.2006.03.052
eng
embargoedAccess
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
oai:dsp.tecnalia.com:11556/23
2016-09-26T11:34:07Z
com_11556_1
col_11556_2
Enhancing Osteoconduction of PLLA-Based Nanocomposite Scaffolds for Bone Regeneration Using Different Biomimetic Signals to MSCs
Ciapetti, Gabriela
Granchi, Donatella
Devescovi, Valentina
Baglio, Serena R.
Leonardi, Elisa
Martini, Desirèe
Jurado, Maria Jesus
Olalde, Beatriz
Armentano, Ilaria
Kenny, Josè M.
Walboomers, Frank X.
Alava, J.I.
Baldini, Nicola
In bone engineering, the adhesion, proliferation and differentiation of mesenchymal stromal cells rely on signaling from chemico-physical structure of the substrate, therefore prompting the design of mimetic “extracellular matrix”-like scaffolds. In this study, three-dimensional porous poly-L-lactic acid (PLLA)-based scaffolds have been mixed with different components, including single walled carbon nanotubes (CNT), micro-hydroxyapatite particles (HA), and BMP2, and treated with plasma (PT), to obtain four different nanocomposites: PLLA + CNT, PLLA + CNTHA, PLLA + CNT + HA + BMP2 and PLLA + CNT + HA + PT. Adult bone marrow mesenchymal stromal cells (MSCs) were derived from the femur of orthopaedic patients, seeded on the scaffolds and cultured under osteogenic induction up to differentiation and mineralization. The release of specific metabolites and temporal gene expression profiles of marrow-derived osteoprogenitors were analyzed at definite time points, relevant to in vitro culture as well asin vivo differentiation. As a result, the role of the different biomimetic components added to the PLLA matrix was deciphered, with BMP2-added scaffolds showing the highest biomimetic activity on cells differentiating to mature osteoblasts. The modification of a polymeric scaffold with reinforcing components which also work as biomimetic cues for cells can effectively direct osteoprogenitor cells differentiation, so as to shorten the time required for mineralization.
2015-06-11
2015-06-11
2012
article
Int. J. Mol. Sci. 2012, 13(2), 2439-2458
1422-0067
http://hdl.handle.net/11556/23
10.3390/ijms13022439
eng
openAccess
MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND
oai:dsp.tecnalia.com:11556/25
2015-06-29T08:51:56Z
com_11556_1
col_11556_2
Universal haptic drive system (EP)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2018-10-10
patent
http://hdl.handle.net/11556/25
EP2349168 (B1)
eng
openAccess
oai:dsp.tecnalia.com:11556/26
2015-06-27T00:00:11Z
com_11556_1
col_11556_2
Universal haptic drive system (US)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2011-05-31
patent
http://hdl.handle.net/11556/26
US2011264018 (A1)
eng
openAccess
oai:dsp.tecnalia.com:11556/27
2015-06-27T00:00:09Z
com_11556_1
col_11556_2
Universal haptic drive system (CA)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/27
CA2739950 (A1)
eng
openAccess
oai:dsp.tecnalia.com:11556/28
2015-06-29T08:48:42Z
com_11556_1
col_11556_2
Universal Haptic drive system (PCT)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/28
WO2010040416 (A1)
eng
openAccess
oai:dsp.tecnalia.com:11556/29
2015-06-29T08:50:25Z
com_11556_1
col_11556_2
Universal haptic drive system (ES)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/29
EP2349168 (B1) Validación ES
eng
openAccess
oai:dsp.tecnalia.com:11556/30
2015-06-29T08:49:30Z
com_11556_1
col_11556_2
Universal haptic drive system (DE)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/30
EP2349168 (B1) Validación DE
eng
openAccess
oai:dsp.tecnalia.com:11556/31
2015-06-26T07:59:46Z
com_11556_1
col_11556_2
Universal haptic drive system (FR)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/31
EP2349168 (B1) Validación FR
eng
openAccess
oai:dsp.tecnalia.com:11556/32
2015-06-26T07:59:13Z
com_11556_1
col_11556_2
Universal haptic drive system (IT)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/32
EP2349168 (B1) Validación IT
eng
openAccess
oai:dsp.tecnalia.com:11556/33
2015-06-26T07:58:26Z
com_11556_1
col_11556_2
Universal haptic drive system (GB)
Matjacic, Zlatko
Cikajlo, Imre
Oblak, Jakob
A universal haptic drive system for arm and wrist rehabilitation is described comprising a hand accessory and a vertical handle for carrying the hand accessory, the vertical handle being movable in a transversal plane. It furthermore comprises a haptic actuator system for applying a force to the vertical handle. The vertical handle comprises a universal joint with locking ability. When the universal joint is unlocked, it enables movements for wrist rehabilitation, and when it is locked it causes a stiff substantially vertical handle enabling movements for arm rehabilitation.
2015-06-26
2015-06-26
2008-10-10
2008-10-10
patent
http://hdl.handle.net/11556/33
EP2349168 (B1) Validación GB
eng
openAccess
oai:dsp.tecnalia.com:11556/65
2015-10-07T00:00:14Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (EPO)
Amundarain, Aitor
Campos, José María
Chica, José Antonio
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2012-07-30
patent
http://hdl.handle.net/11556/65
EP2520870 (B1)
eng
openAccess
oai:dsp.tecnalia.com:11556/34
2023-01-31T09:08:41Z
com_11556_1
col_11556_2
Effects of ion implantation on nano-topographic properties
Braceras, I.
Briz, N.
García, F.
Muñoz, R.
Viviente, J.L.
Onate, J.I.
It is well known that surface properties at nano-scale are determinant in a number of applications, such as sensors, biomedical and optical devices. Nevertheless, relations between surface treatment parameters and their effects on topography at the nano-scale, surface energy or light reflectivity are often poorly understood. In this study, a non fluorescent glass material (Knittel) was selected and subjected to ion implantation treatments with different parameters and species, including Ar, Ne, C, N, CO and NH2. The resulting surface topography at the nano-scale was studied by Atomic Force Microscopy (AFM) and the surface energy was evaluated with the contact angle method. Additionally, the modifications induced on optical properties, i.e. reflection, were evaluated with two different wavelength lasers. The results showed remarkable differences in surface nano-topographies and contact angles (from 15° to 70°) that were obtained. Furthermore, the effects of ion implantation parameters had also very significant consequences on background noise effects, of great importance for optical properties. It was found that the best implantation treatment corresponded to N2
+ ions implanted to a dose of 3×1017 ions/cm2 at an energy of 30 keV. This treatment resulted in a adequate contact angle, producing a nano-textured surface with potential features for a good attachment and orientation of deposited bio-molecules, and a very low background fluorescence, hence allowing a high degree of scanning sensitivity, for application on DNA microarrays. The study has shown that ion implantation represents a powerful tool for modifying key properties on surfaces that play an important role in the response elicited on living tissue and bio-molecules, which is notoriously relevant for the application as bio-sensors.
2015-07-15
2015-07-15
2007-08-05
article
Surface and Coatings Technology, Vol 201, Issues 19–20, pp. 8511-8515
0257-8972
http://hdl.handle.net/11556/34
10.1016/j.surfcoat.2006.02.082
eng
info:eu-repo/grantAgreement//MAT2002-04265-C03-02
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/35
2021-05-14T10:19:22Z
com_11556_1
col_11556_2
BETaaS platform - a Things as a Service environment for future M2M marketplaces
Anggorojati, Bayu
Kyriazakos, Sofoklis
Prasad, Neeli
Vallati, Carlo
Mingozzi, Enzo
Tanganelli, Giacomo
Buonaccorsi, Novella
Valdambrini, Nicola
Martinez-Rodriguez, Belen
Nieto De-Santos, Francisco
Zonidis, Nikolaos
Labropoulous, George
Mamelli, Alessandro
Sommacampagna, Davide
Building the Environment for Things as a Service (BETaaS) is a novel platform for the deployment and execution of contentcentric
Machine-to-Machine (M2M) applications, which relies on a local cloud of gateways. BETaaS platform provides a
uniform interface and services to map content with things in a context-aware manner. Deployment of services for the
execution of applications is dynamic and takes into account the computational resources of the low-end physical devices
used. To this aim, BETaaS platform is based on a suitable defined Internet of Things (IoT) model, allowing the integration of
the BETaaS components within the future Internet environment. In this paper we present the BETaaS concept, the high level
platform architecture and application scenarios that extend the state-of-the-art in M2M communications and open the horizon
for future M2M marketplaces.
2015-07-20
2015-07-20
2015-02-23
article
EAI Endorsed Transactions on Cloud Systems, Vol. 1, No. 1 (2015), pp. 1-9
2410-6895
http://hdl.handle.net/11556/35
10.4108/cs.1.1.e2
eng
info:eu-repo/grantAgreement/EC/FP7/317674/EU/Building the Environment for the Things as a Service/BETaaS
openAccess
ICST
oai:dsp.tecnalia.com:11556/39
2016-04-06T14:47:54Z
com_11556_1
col_11556_2
Tribología de nuevas capas autolubricantes producidas mediante PVD
Onate, J.I.
Brizuela, Marta
García-Luis, A.
Braceras, I.
Pacheco, S.
Viviente, J.L.
Las capas de MoS2 depositadas mediante PVD tienen baja fricción en vacío pero se degradan con facilidad al aire, especialmente en presencia de humedad. Este trabajo describe el desarrollo de nuevas capas de MoS^ modificadas con WC. En ensayos de "bola sobre disco" a 0,75 GPa, las capas presentaron una fricción muy baja y estable (< 0,04) en vacío. Se obtuvo una durabilidad superior a 1 millón de ciclos, mostrando un desgaste de 1,3 X 10e-16 me3 /Nm, mejorado respecto a otras capas de MoS2. El coeficiente de fricción aumentó a 0,15 y la durabilidad disminuyó hasta 1 a 3 x 10e5 ciclos en aire hasta 70 % HR.
El análisis superficial mostró ratios de S/Mo superiores a 1,2, con menos del 2 % de oxígeno, demostrando carácter lubricante.
MoS2 coatings, deposited by PVD show a low friction under vacuum conditions, but degrade easily under atmospheric conditions. This work describes the development of a new type of MoSx, coating, modified with WC. These coatings presented a very low and stable friction coefficient lower than 0.04 when tested under vacuum at 0.75 GPa in a ball on disc tribometer. Durability was higher than 1 million wear cycles, showing a wear rate of 1.3 10e-16 m3 /Nm. When tested under atmospheric conditions and up to 70 % RH, friction increased to 0.15 and durability reached a lower value of up to 3 x 10e5 cycles.
Surface analyses in these coatings showed S/Mo ratios higher than 1.2 and with oxygen levels lower than 2 %, demonstrating the lubricant character of the coating.
2015-07-23
2015-07-23
2005
article
Revista de Metalurgia - Madrid, Vol 41 no. Extr (2005), pp 148-153
1988-4222
http://hdl.handle.net/11556/39
10.3989/revmetalm.2005.v41.iExtra
spa
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
CENIM - CSIC
oai:dsp.tecnalia.com:11556/41
2016-09-27T08:44:36Z
com_11556_1
col_11556_2
MoSx lubricant coatings produced by PVD technologies
Onate, J.I.
Brizuela, Marta
Viviente, J.L.
García-Luis, A.
Braceras, I.
Gonzalez, D.
Garmendia, Iñaki
Among the different options for solid lubrication, MoS2 is probably the most attractive due to its extremely low friction levels. Recent developments in magnetron sputtering physical vapour deposition (PVD) technology have allowed the development of MoS2 composite thin films with more compact structures, low friction behaviour and enhanced wear resistance, reducing degradation by humidity. The present work provides an overview of recent developments in dry lubrication with MoS2 films deposited by modern sputtering PVD and how these MoS2 films alloyed with Ti or WC can outperform conventional unalloyed films not only under vacuum but also under atmospheric high humidity conditions. MoSx–WC composite films outperform MoSx–Ti films, showing endurance at 0·75 GPa as high as 1·2 million wear cycles, also significantly higher than the values obtained from unalloyed, conventional MoS2 thin solid films. The films also exhibit a steady state friction coefficient from 0·02 to 0·04. In addition, these films also show resistance to humid environment when tested under atmospheric conditions.
2015-07-23
2015-07-23
2007-03-01
article
Transactions of the Institute of Metal Finishing, Vol 85 No 2 (2007) pp 75-81
0020-2967
http://hdl.handle.net/11556/41
10.1179/174591907X179857
eng
embargoedAccess
Maney Publishing
oai:dsp.tecnalia.com:11556/37
2015-07-23T00:00:12Z
com_11556_1
col_11556_2
Simulation Platform for Coordinated Charging of Electric Vehicles
Díaz de Arcaya, A.
Lázaro, G.
González-González, A.
Sánchez, V.
EMERALD is a project funded by the European Commission under the FP7 program focusing on energy use optimization on the integration of the FEVs into the transport and energy infrastructure. Between the objectives of EMERALD, enhanced power demand prediction and power flow support management system uses the power flow demand simulation platform considered in this paper. The power flow demand simulation platform is a software tool that defines the estimation of FEVs power demand according to different conditions as, arrival and departure curves, the estimation of power production based on renewable energy sources and the electricity cost. The tool coordinates scheduling for charging of FEVs in order to minimize the recharging cost, considering the energy balance between the generation and demand power
2015-07-22
2015-07-22
2015
conferenceObject
6th International Conference on "Experiments/Process/System Modeling/Simulation/Optimization"
978-618-80527-6-5
http://hdl.handle.net/11556/37
eng
info:eu-repo/grantAgreement/EC/FP7/314151/EU/Energy ManagEment and RechArging for efficient eLectric car Driving/EMERALD
openAccess
oai:dsp.tecnalia.com:11556/36
2015-11-10T09:49:18Z
com_11556_1
col_11556_2
Cooperative Simulation Tool with the Energy Management System for the Storage of Electricity Surplus through Hydrogen
Díaz de Arcaya, A.
González-González, A.
Alzola, J.A.
Sánchez, V.
The INGRID project aims at demonstrating the effective usage of safe, high-density, solid-state hydrogen storage systems for power supply and demand balancing within active power distribution grids with high penetration of intermittent Distributed Generation (Renewable Energy Sources in particular.) The INGRID simulator is divided in two main blocks: the first one represents the Energy Management System, the second one includes the Green Energy Storage System (water electrolyzer, hydrogen solid-storage systems and fuel cell) created to simulate the plant. This paper describes the modules of INGRID simulator and the transient responses of the system for an energy management system virtual according to the power prediction of renewable energy sources, hydrogen demand and the power demand of electric vehicles
2015-07-22
2015-07-22
2015
conferenceObject
6th International Conference on "Experiments/Process/System Modeling/Simulation/Optimization"
978-618-80527-7-2
http://hdl.handle.net/11556/36
eng
info:eu-repo/grantAgreement/EC/FP7/296012/EU/High-capacity hydroge-based green-energy storage solutions for grid balancing/INGRID
openAccess
oai:dsp.tecnalia.com:11556/38
2016-04-06T14:48:37Z
com_11556_1
col_11556_2
Characterization of nanostructured Ti–B–(N) coatings produced by direct current magnetron sputtering
López-Cartes, C.
Martínez-Martínez, D.
Sánchez-López, J.C.
Fernández, A.
García-Luis, A.
Brizuela, Marta
Onate, J.I.
A series of Ti–B–(N) coatings prepared by dc magnetron sputtering using TiB2 targets in Ar/N2 gas mixtures has been chemically and structurally characterized by transmission electron microscopy, X-ray diffraction, electron energy-loss spectroscopy, and X-ray photoelectron spectroscopy. The influence of synthesis parameters such as applied heating power and nitrogen flow on the structure and chemical composition of the coatings has been studied. Independently of the experimental conditions employed during the synthesis, hexagonal TiB2 is the main crystalline phase present in the coatings. The use of N2 leads to the formation of an amorphous mixture of BN/TiN phases, as well as a diminution of the TiB2 crystalline phase. The influence of the composition and structure of the coatings on their hardness is also discussed.
2015-07-22
2015-07-22
2007-02-26
article
Thin Solid Films Vol 515, 2007, Issues 7–8, Pp. 3590–3596
0040-6090
http://hdl.handle.net/11556/38
10.1016/j.tsf.2006.11.013
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/40
2016-04-06T14:49:24Z
com_11556_1
col_11556_2
Magnetron sputtering of Cr(Al)N coatings: Mechanical and tribological study
Brizuela, Marta
García-Luis, A.
Braceras, I.
Onate, J.I.
Sánchez-López, J.C.
Martínez-Martínez, D.
López-Cortés, C.
Fernández, A.
CrN coatings produced by magnetron sputtering are routinely deposited on tools and components for machining and forming applications. This paper reports on the effect of additions of aluminium (<15 at.%) on the mechanical and tribological properties of CrN coatings. Aluminium has been incorporated into CrN by co-sputtering of chromium and aluminium in a mixture of argon and nitrogen. Mechanical properties have been evaluated by ultramicroindentation techniques and scratch testing, while tribological tests have been carried out against ball bearing steel and titanium alloy balls by the pin-on-disc method. The thermal stability and oxidation resistance of the coatings have also been examined.
A significant increase in hardness, reaching values up to 35 GPa, has been achieved for the CrAlN coatings when compared to CrN coatings. The improvement in tribological properties has also been remarkable, with a decrease in friction coefficient against bearing steel and also a non-adhesive wear mechanism against titanium alloy balls. In addition, the CrAlN coatings exhibited higher thermal stability than pure CrN coatings.
2015-07-23
2015-07-23
2005-10-01
article
Surface & Coatings Technology Vol 200, Issues 1-4 (2005) pp.192– 197
0257-8972
http://hdl.handle.net/11556/40
10.1016/j.surfcoat.2005.02.105
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/43
2016-04-06T14:52:24Z
com_11556_1
col_11556_2
Tailored synthesis of TiC/a-C nanocomposite tribological coatings
Martínez-Martínez, D.
López-Cartes, C.
Justo, A.
Fernández, A.
Sánchez-López, J.C.
García-Luis, A.
Brizuela, Marta
Onate, J.I.
Composite coatings made of nanocrystalline TiC (nc-TiC) particles and amorphous carbon (a-C) have been prepared in a double magnetron sputtering system using graphite and titanium targets under Ar bombardment. Chemical composition and microstructure of coatings were studied by transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), and x-ray diffraction (XRD) for a set of samples prepared varying the ratio and intensity of power applied to each magnetron. Changes in coatings microstructure, from a quasipolycrystalline TiC to a nanocomposite formed by nanocrystals of TiC embedded in an amorphous matrix of carbon (nc-TiC/a-C), are observed depending on the synthesis conditions.
Tribological and mechanical properties of coatings were tested using a pin-on-disk tribometer and an ultramicrohardness indenter, respectively. Coatings with moderate hardness (7-27 GPa), low friction (0.1-0.2), and low wear rates (k similar to 10(-7) mm(3)/N m) were obtained. A percentage between 15% and 30% of TiC is found as an optimum value to get a good compromise between good mechanical and tribological properties. Finally, a mapping of the mechanical and tribological properties of the nc-TiC/a-C system is presented for the synthesis conditions employed
2015-07-24
2015-07-24
2005-10-25
article
Journal of Vacuum Science and Technology A, Vol 23, Issue 6 (2005), pp. 1732-1736
0734-2101
http://hdl.handle.net/11556/43
10.1116/1.2101810
eng
embargoedAccess
American Vacuum Society (A V S) AMER INST PHYSICS
oai:dsp.tecnalia.com:11556/42
2016-04-06T14:51:35Z
com_11556_1
col_11556_2
Mechanical behavior and oxidation resistance of Cr (Al) N coatings
Sánchez-López, J.C.
Martínez-Martínez, D.
López-Cartes, C.
Fernández, A.
Brizuela, Marta
García-Luis, A.
Onate, J.I.
Nanocrystalline chromium nitride and ternary chromium aluminium nitride thin films were deposited by reactive magnetron sputtering of Cr and Al targets in argon/nitrogen atmosphere varying the sputtering power and gas composition. The coatings were characterized in terms of crystal phase, chemical composition, microstructure, and mechanical properties by x-ray diffraction, x-ray photoelectron spectroscopy, including x-ray-induced Auger electron spectroscopy, transmission electron microscopy, selected-area electron diffraction, electron energy-loss spectroscopy, cross-sectional scanning electron microscopy, and ultramicrohardness tester. The incorporation of Al in the composition of the films produces an increase in the mechanical properties (hardness and reduced Young's modulus) and an increased thermal resistance against oxidation in comparison to the pure CrN composition. The hardness behavior was attributed mainly to a reduction of the CrN crystallite size according to a Hall-Petch relationship. The oxidation resistance was evaluated after annealing both types of coatings in air up to 800 degrees C. The oxygen content and the crystallite size appear almost unaltered in the CrAIN in contrast to the pure CrN films where the oxidation and grain growth is very noticeable at 800 degrees C. This improvement in thermal stability in air is explained by the formation of a nanocomposite structure of small CrN crystals embedded in an amorphous aluminum oxide or oxinitride matrix that prevents the CrN phase from crystal growth and further oxidation
2015-07-24
2015-07-24
2005-06-21
article
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, Vol 23, Issue 4 (2005), pp 681-686
0734-2101
http://hdl.handle.net/11556/42
10.1116/1.1946711
eng
embargoedAccess
American Vacuum Society (A V S) AMER INST PHYSICS
oai:dsp.tecnalia.com:11556/64
2015-10-07T00:00:12Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (PCT)
Amundarain, Aitor
Campos, José María
Chica, José Antonio
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2009-12-29
patent
http://hdl.handle.net/11556/64
WO2011080356 (A1)
eng
openAccess
oai:dsp.tecnalia.com:11556/44
2016-04-06T14:46:12Z
com_11556_1
col_11556_2
Mechanical properties of nanocrystalline Ti–B–(N) coatings produced by DC magnetron sputtering
García-Luis, A.
Brizuela, Marta
Onate, J.I.
Sánchez-López, J.C.
Martínez-Martínez, D.
López-Cartes, C.
Fernández, A.
Ti–B–(N) coatings have been deposited by DC magnetron sputtering using TiB2 targets in Ar/N2 gas mixtures. The influence of bias voltage and nitrogen flow on the mechanical and tribological properties of these coatings has been studied. Mechanical properties have been evaluated by ultra-microindentation techniques and scratch testing; tribology tests have been performed in a pin-on-disc apparatus with controlled humidity conditions.
Microstructural characterization by X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) demonstrates the nanocrystalline structure of Ti–B–(N) coatings and allows the interpretation of their mechanical behaviour.
Hardness values up to 58 GPa have been achieved, depending on deposition conditions. Increasing the bias voltage on the substrates improves the hardness of coatings, while the addition of nitrogen significantly decreases these values. Coating adhesion obtained on highspeed steel is very good in most cases, reaching values higher than 60 N of critical load. Tribotests performed on these coatings against a Steel contact (wear conditions: 0.98 N load, 10 cm/s, 50% RH, 10 mm bearing steel ball diameter) have yielded very low wear rates but friction coefficients in the range of 0.6–1.0.
2015-07-24
2015-07-24
2005-10-01
article
Surface & Coatings Technology Vol 200, No 1-4, (2005) pp. 734– 738
0257-8972
http://hdl.handle.net/11556/44
10.1016/j.surfcoat.2005.02.070
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/45
2016-04-06T14:47:11Z
com_11556_1
col_11556_2
Wear reduction effect on ultra-high-molecular-weight polyethylene by application of hard coatings and ion implantation on cobalt chromium alloy, as measured in a knee wear simulation machine
Onate, J.I.
Comin, M.
Braceras, I.
García-Luis, A.
Viviente, J.L.
Brizuela, Marta
Garagorri, N.
Peris, J.L.
Alava, J.I.
The most important factor affecting performance and longevity of hip joint and knee implants is the wear rate of the ultra-high-molecular-weight polyethylene (UHMWPE) component. UHMWPE wear debris has been linked to complications including tissue inflammation, bone loss (osteolysis) and implant loosening. Reduction of debris has been addressed by investigating new polyethylene formulations, manufacturing and finishing processes, including surface treatments and coatings both on plastic and metallic components. There have been many studies on the effect of surface treatments and hard coatings on cobalt chromium and titanium alloys for prosthetic applications. However, most of them have used laboratory tribo-testers without much correlation to articulating movements in human joints. In this work, hard coatings (TiN and DLC) and surface treatments (nitrogen ion implantation) have been investigated as potential candidates to reduce wear of UHMWPE, when applied on the counter face cobalt chromium alloy. Also the effect of applying nitrogen ion implantation on the UHMWPE surface itself has been investigated. To evaluate wear performance a special knee wear simulator has been used with a combined rolling-sliding movement that corresponds to the most unfavourable situation in the knee. As testing materials, conventional coated and uncoated Co–Cr as well as Al2O3 femoral heads were used against UHMWPE plates to obtain comparative data. Testing was carried out at 50 MPa using distilled water at 37±2°C as a lubricant. Wear measurements on UHMWPE were made following ASTM F732 standard by weight loss measurements and also by laser profilometry. The results, up to 5 million wear cycles that represent approximately 3 years of implant life, clearly have demonstrated the beneficial effects of diamond-like carbon (DLC) and ion implantation (both on Co–Cr and UHMWPE) in reducing wear of UHMWPE. Similar values were also obtained for Al2O3 ceramic material. A wear reduction up to approximately five times was obtained by the former materials, in comparison with the uncoated control specimen. However, the ion plated TiN coating increased significantly wear on the UHMWPE. Transference of UHMWPE to the ball was very evident with the uncoated control and TiN coated Co–Cr, as observed by SEM, but with DLC and the ceramic material this occurred to a much lesser extent. Some micro-delamination at the worn surface of the UHMWPE was observed when wearing against uncoated Co–Cr, but was not clear in the rest options. Ion implantation and DLC can thus be two good candidate treatments to reduce wear of UHMWPE in cobalt chromium knee and hip joint implants in substitution of a more expensive ceramic material. This DLC has passed all biocompatible tests in accordance with FDA regulations and ISO 10993 standards for implantable devices. An example of a uniformly DLC coated femoral head and knee implant is shown.
2015-07-24
2015-07-24
2001-07
article
Surface and Coatings Technology Vol 142 -144 (2001), pp. 1056- 1062
0257-8972
http://hdl.handle.net/11556/45
10.1016/S0257-8972(01)01074-X
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/49
2016-03-07T15:31:28Z
com_11556_1
col_11556_2
The Vacuum Tribology Model (VTM) of Tribolab
Garmendia, Iñaki
Landaberea, Aitor
Anglada, Eva
Fernandez-Sanz, Ramon
Santiago, Ramon
Herrada, Francisco
Encinas, Jose Miguel
TriboLAB is a tribology instrument that is planned for installation in the EuteF Flight Segment Platform, along with several other European scientific instruments. Eutef will be fixed onto an Express Pallet Adapter (ExPA), which provides standard structural, mechanical, electrical and communications interfaces to the Columbus External Payload Facility of the International Space Station (ISS).
As a part of the model philosophy, a vacuum tribological model (VTM) has been developed to generate “on ground” tribological data of selected lubricants. The idea is to compare the results obtained “on ground” with those that will be produced in the space, in order to investigate the different behaviors of same tribological films and to be able to compare the performance of specific lubricants in Low Earth Orbit
(LEO) conditions.
The VTM is composed of six double experiment cells that perform respectively ball bearing (BB) experiments (with liquid and solid lubrication) and pin-on-disk (PoD) tests of solid lubricants. Thin films of alloyed MoS2 are being tested in the VTM under controlled vacuum conditions.
In this work, the two sections of the VTM are described
2015-08-24
2015-08-24
2003-09
conferenceObject
10th European Space Mechanisms and Tribology Symposium, Proceedings, ESA Publications Division, San Sebastian, Spain, 2003: pp. 67–70
92-9092-834-4
http://hdl.handle.net/11556/49
eng
embargoedAccess
ESA Publications Division
oai:dsp.tecnalia.com:11556/50
2017-02-08T15:27:55Z
com_11556_1
col_11556_2
Occupational exposure to nano-TiO2 in the life cycle steps of new depollutant mortars used in construction
Vaquero-Moralejo, Celina
Galarza, N.
López de Ipiña, J.M.
Gutierrez-Cañas, C.
Múgica, I.
Aragón, G.
Jaen, M.
Pina, R.
Larraza, I.
Esteban-Cubillo, A.
Thompson, D.
Pui, D.Y.H.
The present work is focused on the measurement of workers exposure to nano-TiO2
in the life cycle steps of depollutant mortars. It has been done in the framework of the
SCAFFOLD project, which aims at the management of potential risks arising from the use of
manufactured nanomaterials in construction. Main findings can be summarized as follows: (1)
The occupational exposure to nano- TiO2 is below 0.3 mg/m3 for all measured scenarios. The
highest concentrations were measured during the cleaning task (in the nano- TiO2
manufacturing process) and during the application (spraying) of depollutant coatings on a wall.
(2) It was found a high release of particles above the background in several tasks as expected
due to the nature of the activities performed. The maximum concentration was measured
during drilling and during adding powder materials (mean total particle concentration up to
5.591E+04 particles/cm3 and 5.69E+04 particles/cm3). However, considering data on total
particle concentration released, no striking differences have been observed when tasks have
been performed using conventional materials in the sector (control) and when using materials
doped with nano-objects.
2015-09-10
2015-09-10
2015
article
4TH INTERNATIONAL CONFERENCE ON SAFE PRODUCTION AND USE OF NANOMATERIALS (NANOSAFE2014) Book Series: Journal of Physics Conference Series Volume: 617 Article Number: 012006
1742-6596
http://hdl.handle.net/11556/50
10.1088/1742-6596/617/1/012006
eng
info:eu-repo/grantAgreement/EC/FP7/280535/EU/Innovative strategies, methods and tools for occupational risks/SCAFFOLD
http://creativecommons.org/licenses/by/3.0/es/
openAccess
Attribution 3.0 Spain
IOP Publishing Ltd.
oai:dsp.tecnalia.com:11556/75
2016-09-02T10:56:39Z
com_11556_1
col_11556_2
Uso de redes neuro-borrosas RFNN para la aproximación del comportamiento de una neuroprótesis de antebrazo en pacientes con daño cerebral
Imatz-Ojanguren, Eukene
Irigoyen Gordo, Eloy
Valencia Blanco, David
Zabaleta, Haritz
Keller, Thierry
Las neuroprótesis son sistemas basados en la técnica de estimulación eléctrica funcional que provocan contracciones musculares mediante la excitación artificial de nervios periféricos, y son utilizadas para sustituir funciones motrices/sensoriales en aplicaciones tanto asistivas como terapéuticas. Este trabajo presenta la posibilidad de utilizar redes neuro-borrosas recurrentes para obtener modelos capaces de extraer las características principales del resultado de la aplicación de una neuroprótesis de miembro superior en distintos pacientes. Se ha entrenado una Recurrent Fuzzy Neural Network (RFNN) con datos reales obtenidos de pacientes crónicos de daño cerebral adquirido. Se han analizado distintas estrategias y estructuras y los resultados preliminares muestran la
capacidad de estas redes de aprender las características principales de distintos sujetos y de proporcionar información fácilmente interpretable.
2015-10-08
2015-10-08
2015-09
conferenceObject
Actas de las XXXVI Jornadas de Automática: 716-723 (2015)
978-84-15914-12-9
http://hdl.handle.net/11556/75
spa
openAccess
oai:dsp.tecnalia.com:11556/52
2015-09-22T00:00:12Z
com_11556_1
col_11556_2
Production of PHB from Chicory Roots - Comparison of Three Cupriavidus necator Strains
Haas, C.
Steinwandter, V.
Diaz De Apodaca, E.
Maestro Madurga, B.
Smerilli, M.
Dietrich, T.
Neureiter, M.
Chicory roots from hydroponic salad cultivation are an abundant food residue in Navarra (Spain) that are underutilized to date. Aiming at a holistic utilization of resources, we report here the first process using chicory root hydrolysate for the production of poly([R]-3-hydroxybutyrate) (PHB). The polymer can be used for packaging material made for the locally produced vegetables.
In the first step, we developed a pre-treatment process to obtain a hydrolysate, which contained 34 g L-1 sugars and 0.7 g L-1 total Kjeldahl nitrogen. This hydrolysate was used as fermentation substrate for three PHB-producing strains. Cupriavidus necator DSM 428 reached a dry biomass concentration of 11.3 g L-1 with a PHB content of 66 % in dry mass within 5 days. C. necator DSM 531 yielded 3.5 g L-1 dry biomass containing 46 % PHB within the same period. C. necator DSM 545 was superior over the other two in that 14.0 g L-1 of biomass containing 78 % PHB after only 3 days were obtained. These results show that even within the same species, the productivities on natural substrates are very different. The produced polymers were extracted using chloroform, and several thermo-physical parameters are in good accordance with published data. Overall, our holistic approach and the encouraging results prove that chicory roots are a viable fermentation substrate for PHB-production.
2015-09-21
2015-09-21
2015-06-03
article
Chem. Biochem. Eng. Q., Vol. 29, no. 2 (2015), pp. 99–112
1846-5153
http://hdl.handle.net/11556/52
10.15255/CABEQ.2014.2250
eng
openAccess
CROATIAN SOC CHEMICAL ENGINEERING TECHNOLOGY, BERISLAVICEVA 6, PO BOX 123, HR-10000 ZAGREB, CROATIA
oai:dsp.tecnalia.com:11556/51
2015-09-19T00:00:11Z
com_11556_1
col_11556_2
Efficient P(3HB) extraction from Burkholderia sacchari cells using non-chlorinated solvents
Rosengart, A.
Cesário, M.T.
de Almeida, M. Catarina M.D.
Raposo, Rodrigo S.
Espert, A.
Díaz de Apodaca, E.
da Fonseca, M. Manuela R.
A technique using safer, non-chlorinated organic solvents for the extraction of poly-3-hydroxybutyrate (P(3HB)) from bacterial cells was developed, aiming to attain high recovery yields and purities. Some solvents were selected from the GlaxoSmithKline guide as sustainable industrial solvents and the solubility of P(3HB) calculated using predictive equations from literature. Based on the calculated solubility values, anisole, cyclohexanone and phenetole were tested as extraction solvents and the relevant process variables (extraction temperature, extraction time and mass of cells/solvent volume ratio) were addressed. Polymer recovery yields of 97% and 93% were obtained with anisole and cyclohexanone, respectively, at 120–130 °C using a cell/solvent ratio of 1.5% (w/v). Maximum polymer purities using these experimental conditions were 98% for both solvents. The recovery yield and the polymer purity attained with chloroform (reference solvent) were 96 and 98%, respectively. Higher cell/solvent ratios of 6.0% (w/v) showed slightly lower recovery yields and purities. The average molecular weight and the thermal properties of the polymers extracted with the alternative solvents were fully comparable to those of the polymers obtained by chloroform extraction, demonstrating that the applied conditions did not significantly alter the properties of the extracted P(3HB).
2015-09-18
2015-09-18
2015-11-15
article
Biochemical Engineering Journal, 103 (2015), pp. 39-46
1369-703X
http://hdl.handle.net/11556/51
10.1016/j.bej.2015.06.013
eng
info:eu-repo/grantAgreement/EC/FP7/246449/EU/New tailor-made PHB-based nanocomposites for high performance/BUGWORKERS
embargoedAccess
2015 Elsevier B.V
oai:dsp.tecnalia.com:11556/54
2019-01-21T13:37:42Z
com_11556_1
col_11556_2
Benchmarking Bipedal Locomotion: A Unified Scheme for Humanoids, Wearable Robots, and Humans
Torricelli, Diego
Gonzalez-Vargas, Jose
Veneman, Jan F.
Mombaur, Katja
Tsagarakis, Nikos
del-Ama, Antonio J.
Gil-Agudo, Angel
Moreno, Juan C.
Pons, Jose L.
In the field of robotics, there is a growing awareness of the importance of benchmarking [1], [2]. Benchmarking not only allows the assessment and comparison of the performance of different technologies but also defines and supports the standardization and regulation processes during their introduction to the market. Its importance has been recently emphasized by the adoption of the technology readiness levels (TRLs) in the Horizon 2020 information and communication technologies by the European Union as an important guideline to assess when a technology can shift from one TRL to the other. The objective of this article is to define the basis of a benchmarking scheme for the assessment of bipedal locomotion that could be applied and shared across different research communities.
2015-09-30
2015-09-30
2015-09-10
article
Robotics & Automation Magazine, Volume:22, Issue:3 (2015), pp. 103-115
1070-9932
http://hdl.handle.net/11556/54
10.1109/MRA.2015.2448278
eng
info:eu-repo/grantAgreement/EC/FP7/601003/EU/Balance Augmentation in Locomotion, through Anticipative, Natural and Cooperative control of Exoskeletons/BALANCE
openAccess
IEEE
oai:dsp.tecnalia.com:11556/87
2015-10-09T08:54:05Z
com_11556_1
col_11556_2
Consistent Arm Rehabilitation from Clinical to Home Environment-Integrating the Universal Haptic Drive into the TeleReha Software Platform
Veneman, Jan F.
Jung, Je Hyung
Perry, Joel C.
Keller, Thierry
Restoring human motor and cognitive function has been a fascinating research area during the last century. Interfacing the human nervous system with electro-mechanical rehabilitation machines is facing its crucial passage from research to clinical practice, enhancing the potentiality of therapists, clinicians and researchers to rehabilitate, diagnose and generate knowledge. The 2012 International Conference on Neurorehabilitation (ICNR2012) brings together researchers and students from the fields of Clinical Rehabilitation, Applied Neurophysiology and Biomedical Engineering, covering a wide range of research topics: · Clinical Impact of Technology · Brain-Computer Interface in Rehabilitation · Neuromotor & Neurosensory modeling and processing · Biomechanics in Rehabilitation · Neural Prostheses in Rehabilitation · Neuro-Robotics in Rehabilitation · Neuromodulation This Proceedings book includes general contributions (2-page extended abstracts) from oral and poster sessions, as well as from special sessions. A section is also dedicated to pre-post conference workshops, including invited contributions from internationally recognized researchers. A selection of most relevant papers have been considered for publication in international journals (e.g. JNER, JACCES, …)., therefore they will appear soon in their extended versions in Special Issues. These Proceedings also contain brief descriptions of keynote lectures from invited world-class professors, and a number of thematic round tables covering technological and institutional issues.
This paper describes the current work on integrating a haptic force feedback device, named the Universal Haptic Drive (UHD), for upper limb training into a software platform for telerehabilitation which has been developed for at-home rehabilitation after stroke. The aim of the integration is to provide a consistent training and assessment platform during the entire rehabilitation period, from clinical facilities to home, while also allowing less specialized supervision to rehabilitate a stroke patient.
2015-10-09
2015-10-09
2013-01-01
bookPart
Pons, José L., Diego Torricelli, and Marta Pajaro, eds. Converging Clinical and Engineering Research on Neurorehabilitation. Springer Science & Business Media, 2013: pp 1013-1017
978-3-642-34545-6
http://hdl.handle.net/11556/87
eng
embargoedAccess
Springer Berlin Heidelberg
oai:dsp.tecnalia.com:11556/53
2015-09-26T00:00:10Z
com_11556_1
col_11556_2
Development of computer games for assessment and training in post-stroke arm telerehabilitation
Rodriguez-de-Pablo, Cristina
Perry, Joel C.
Cavallaro, Francesca I.
Zabaleta, Haritz
Keller, Thierry
Stroke is the leading cause of long term disability among adults in industrialized nations. The majority of these disabilities include deficiencies in arm function, which can make independent living very difficult. Research shows that better results in rehabilitation are obtained when patients receive more intensive therapy. However this intensive therapy is currently too expensive to be provided by the public health system, and at home few patients perform the repetitive exercises recommended by their therapists. Computer games can provide an affordable, enjoyable, and effective way to intensify treatment, while keeping the patient as well as their therapists informed about their progress. This paper presents the study, design, implementation and user-testing of a set of computer games for at-home assessment and training of upper-limb motor impairment after stroke.
2015-09-25
2015-09-25
2012
conferenceObject
IEEE Engineering in Medicine and Biology Society Conference Proceedings, 4571-4574 (2012)
978-1-4577-1787-1
http://hdl.handle.net/11556/53
eng
embargoedAccess
IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
oai:dsp.tecnalia.com:11556/56
2015-10-07T00:00:11Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (EPO)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/56
EP2266745 (B1)
eng
openAccess
oai:dsp.tecnalia.com:11556/55
2015-10-07T00:00:10Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (PCT)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2008-03-03
patent
http://hdl.handle.net/11556/55
WO2009109667 (A1)
eng
openAccess
oai:dsp.tecnalia.com:11556/57
2015-10-07T00:00:14Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (ES)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/57
ES2449075 (T3)
eng
openAccess
oai:dsp.tecnalia.com:11556/58
2015-10-06T13:50:45Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (DE)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/58
eng
openAccess
oai:dsp.tecnalia.com:11556/59
2015-10-06T13:50:56Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (FR)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/59
eng
openAccess
oai:dsp.tecnalia.com:11556/60
2015-10-06T13:51:05Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (GB)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/60
eng
openAccess
oai:dsp.tecnalia.com:11556/61
2015-10-06T13:51:14Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (BE)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/61
eng
openAccess
oai:dsp.tecnalia.com:11556/62
2015-10-06T13:51:25Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (IT)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/62
eng
openAccess
oai:dsp.tecnalia.com:11556/63
2015-10-06T13:51:38Z
com_11556_1
col_11556_2
Tool for the friction stir welding of two metal items with an angled joint having a pin and a wedge-shaped shoulder (SE)
Martínez, Leonardo
Penalva, Mari Luz
Otaegui, Amaia
The invention relates to a tool for the friction stir welding of two metal items with a joint angle of less than 180 DEG , comprised of a shoulder and a pin which exits from said shoulder. Said shoulder is wedge-shaped, with two walls forming an angle equal to the angle of the joint of the two metal items and with an interference zone at the meeting point of said walls. The interference zone is configured so as to penetrate the metal items at the angle of their joint. The pin exits from said interference zone. The shoulder being thus configured, it may concentrate the pressure on the area on which the pin operates.
2015-10-06
2015-10-06
2008-03-03
2010-10-04
patent
http://hdl.handle.net/11556/63
eng
openAccess
oai:dsp.tecnalia.com:11556/66
2015-10-07T00:00:14Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (ES)
Amundarain, Aitor
Campos, José María
Chica, José Antonio
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2012-07-30
patent
http://hdl.handle.net/11556/66
ES2471218 (T3)
eng
openAccess
oai:dsp.tecnalia.com:11556/67
2015-10-06T13:52:19Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (DE)
Amundarain, Aitor
Campos, José María
Chica, José Antonio
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2012-07-30
patent
http://hdl.handle.net/11556/67
eng
openAccess
oai:dsp.tecnalia.com:11556/68
2015-10-06T13:52:28Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (FR)
Amundarain, Aitor
Campos, José María
José Antonio, Chica
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2012-07-30
patent
http://hdl.handle.net/11556/68
eng
openAccess
oai:dsp.tecnalia.com:11556/69
2015-10-06T13:52:42Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (IT)
Amundarain, Aitor
Campos, José María
Chica, José Antonio
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2012-07-30
patent
http://hdl.handle.net/11556/69
eng
openAccess
oai:dsp.tecnalia.com:11556/70
2015-10-06T13:52:55Z
com_11556_1
col_11556_2
Passive solar collector module for building facades (GB)
Amundarain, Aitor
Campos, José María
Chica, José Antonio
Meno, Sandra
Uriarte, Amaia
Garay, Roberto
Herrero, Julio Cesar
Oliver, Marc
Pérez, Sergio
Elguezabal, Peru
Romero, Ander
Apraiz, Inés
The invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.
2015-10-06
2015-10-06
2009-12-29
2012-07-30
patent
http://hdl.handle.net/11556/70
eng
openAccess
oai:dsp.tecnalia.com:11556/81
2016-09-02T10:54:20Z
com_11556_1
col_11556_2
Transcutaneous FES-induced pain maps on post-stroke upper limb
Imatz-Ojanguren, Eukene
Cuesta, Alicia
Iglesias, Javier
Carratala, María
Keller, Thierry
Functional Electrical Stimulation (FES) is a technique to artificially stimulate motor nerves in order to restore motor/sensory functions for assistive and therapeutic applications. This preliminary study attempts to detect differences in the perception of transcutaneous FES in upper limbs. Three chronic stroke survivors participated in the study. Multi-field electrodes were used to selectively activate the targeted areas over the wrist-finger flexors, wrist-finger extensors, biceps, and triceps muscles. Results showed no significant correlation between the applied current and pain ratings. Differences in the rating of pain in different fields over the four targeted areas were observed. The initial results suggest that here is a common pattern to most subjects for each area of the upper limb.
2015-10-09
2015-10-09
2014-09
conferenceObject
IEEE 19th International Functional Electrical Stimulation Society Annual Conference (IFESS): 1-4 (2014)
978-1-4799-6482-6
http://hdl.handle.net/11556/81
eng
openAccess
oai:dsp.tecnalia.com:11556/93
2016-09-02T10:56:02Z
com_11556_1
col_11556_2
Feasibility of Using Neuro-Fuzzy Subject-Specific Models for Functional Electrical Stimulation Induced Hand Movements
Imatz-Ojanguren, Eukene
Irigoyen, Eloy
Valencia, David
Keller, Thierry
Functional Electrical Stimulation (FES) is a technique that artificially elicits muscle contractions and it is used to restore motor/sensory functions in both assistive and therapeutic applications. The use of multi-field surface electrodes is a novel popular approach in transcutaneous FES applications. Lately, hybrid systems that combine artificial neural networks and fuzzy logic have also been proposed for many applications in different areas. This paper presents the possibility of combining both approaches for obtaining subject-specific models of FES induced hand movements for grasping applications. Data of the hand and finger motion from two subjects affected by acquired brain injury were used to train two different approaches: coactive neuro-fuzzy inference system and recurrent fuzzy neural network. Preliminary results show that these approaches can be considered in modelling applications for their ability to learn and predict main characteristics of the system, as well as providing useful information from the original system that could be interpreted as subject-specific knowledge.
2015-11-24
2015-11-24
2015-09
conferenceObject
IFAC-PapersOnLine: 9th IFAC Symposium on Biological and Medical Systems. 48(20): 321-326 (2015)
ISSN: 2405-8963
http://hdl.handle.net/11556/93
10.1016/j.ifacol.2015.10.159
eng
openAccess
oai:dsp.tecnalia.com:11556/82
2016-03-07T15:21:49Z
com_11556_1
col_11556_2
New casting solutions: Numerically simulated EXACTCAST® core-sleeves eliminate critical problems with automobile high-security components (patented)
Prat, Jaime
Iglesias, Luis
Arrieta, Mitxel
Landa, Iñaki
Meléndez, Antton
Anglada, Eva
Bárcena, Jorge
IBERIA ASHLAND CHEMICAL S.A. and KEMEN RECUPAC S.A. (ASHLAND Group), have been carrying out the ‘Casting Solutions’ project in one of their divisions, as yet another service for the worldwide Foundry market. The information contained herein shows the results of a joint venture between IBERIA ASHLAND CHEMICAL S.A.-KEMEN RECUPAC S.A. (The Process Patent Holders), INASMET (Technological Development Centre) and FAGOR-EDERLAN (The Foundry division of the MCC group), that has resulted in the fine-tuning of an innovative application that is highly important for the sanity of castings, savings in the amount of melt needed and associated cost savings.
2015-10-09
2015-10-09
2004-09
conferenceObject
PRAT, Jaime; IGLESIAS, Luis; ARRIETA, Mitxel; LANDA, Iñaki; MELENDEZ, Antton; ANGLADA, Eva; BARCENA, Jorge. New casting solutions: Numerically simulated EXACTCAST® core-sleeves eliminate critical problems with automobile high-security components (patented). In: DAL, Kubilay (ed.). Proceedings of the 66th World Foundry Congress, Isambul (Turkey), 2004. Istambul (Turkey): Turkish Foundrymen's Association, 2004.
9789758070923
http://hdl.handle.net/11556/82
eng
embargoedAccess
Turkish Foundrymen's Association
oai:dsp.tecnalia.com:11556/85
2016-05-18T13:45:13Z
com_11556_1
col_11556_2
Machos-manguitos Exactcast® simulados numéricamente eliminan problemas críticos en piezas de alta seguridad del automóvil (patentado)
Meléndez, Antton
Anglada, Eva
Bárcena, Jorge
Prat, Jaime
Iglesias, Luis
Arrieta, Mitxel
Akizu, Angel
Landa, Iñaki
Iberia Ashland y Kemen Recupac (Grupo Ashland), vienen desarrollando el plan 'Casting Solutions' en una de sus divisiones como un servicio más para el mercado mundial de Fundición. La información que aquí se presenta muestra el resultado de una actuación conjunta entre Iberia Ashland - Kemen Recupac (Patentadores del proceso), Inasmet (Centro de Desarrollo Tecnológico) y Fagor-Ederlan (Fundición del grupo MCC) como consecuencia de la cual se ha puesto a punto una aplicación innovadora de gran importancia en lo referente a la sanidad de las piezas, al ahorro en la cantidad de caldo necesario para ello y el correspondiente ahorro en costos.
La tecnología que aquí se presenta consiste en la utilización avanzada de microesferas huecas de Silicato de Alúmina, las cuales por si solas o mezcladas con productos exotérmicos y aglomeradas con el sistema Cold-Box producen piezas con diversas formas, pudiéndose utilizar éstas como manguitos convencionales o bien con una doble función, es decir, como macho y manguito simultaneamente.
2015-10-09
2015-10-09
2004-11
article
MELENDEZ, Antton; ANGLADA, Eva; BARCENA, Jorge; PRAT, Jaime; IGLESIAS, Luis; ARRIETA, Mitxel; AKIZU, Angel; LANDA, Iñaki. Machos-manguitos Exactcast® simulados numéricamente eliminan problemas críticos en piezas de alta seguridad del automóvil (patentado). Fundidores, 119, 26-31, noviembre 2004.
1132–0362
http://hdl.handle.net/11556/85
spa
embargoedAccess
Metal Spain
oai:dsp.tecnalia.com:11556/84
2016-03-07T15:26:20Z
com_11556_1
col_11556_2
Numerical Simulation of the Upward Continuous Casting of Magnesium Alloys
Landaberea, Aitor
Pedrós, Pablo
Anglada, Eva
Garmendia, Iñaki
The continuous casting of magnesium alloys in vertical upward direction is a novel technology which can be employed for the production of semi-finished materials circumventing the main disadvantages of using conventional casting processes since the risks of burning and explosion are practically eliminated. The present investigation deals with the simulation of the upward continuous casting of round billets of magnesium alloys. The equations for the flow field with heat transfer are numerically solved by a finite volume method and the solidification is accounted via an enthalpy-porosity formulation where the mushy region is modeled as a pseudo porous medium. The obtained temperature distribution is then used as input for a thermo mechanical analysis to determine the stress field in the billet during the casting process. Several configurations have been simulated and comparison of computed results with available experimental data is provided.
2015-10-09
2015-10-09
2005-11
conferenceObject
LANDABEREA, Aitor; PEDROS, Pablo; ANGLADA, Eva; GARMENDIA, Iñaki. Numerical Simulation of the Upward Continuous Casting of Magnesium Alloys. In: MÜLLER, H.R. (ed.). Proceedings of the Continuous Casting of Non-Ferrous Alloys International Conference and Exhibition, Neu-Ulm (Germany), 2005. Weinheim (Germany): Wiley-VCH, 2005, 202-208. DOI: 10.1002/9783527607969.ch27
3-527-31341-9
http://hdl.handle.net/11556/84
eng
embargoedAccess
Wiley-VCH, Weinheim
oai:dsp.tecnalia.com:11556/86
2016-05-18T13:43:47Z
com_11556_1
col_11556_2
Simulation numérique de manchons-noyaux Exactcast®* pour coulée de pièces de sécurité
Meléndez, Antton
Anglada, Eva
Bárcena, Jorge
Prat, Jaime
Iglesias, Luis
Arrieta, Mitxel
Landa, Iñaki
The information contained herein shows the results of a joint venture between Iberia Ashland Chemical S.A. and Kemen Recupac S.A. (The process patent holders), INASMET (Technological Development Centre) and Fagor-Ederlan (The foundry division of the MCC group), that has resulted in the fine-tuning of an innovative application that is highly important for the health of parts, savings in the amount of melt needed and associated cost savings. The technology described here consists of the advanced use of a low-density aluminium-silicate ceramic aggregate (LDASC), which, either alone or mixed with exothermic products and bonded with the Cold-Box system, produce different-shaped parts. These can be used as conventional sleeves or with a double function - as core and sleeve simultaneusly.
Les informations contenues dans cet article résultent de la collaboration entre Iberia Ashland Chemical S.A. et Kemen Recupac (titulaires du brevet), INASMET (Centre Technologique des Matériaux) et Fagor-Ederlan (division fonderie du groupe MCC), qui a débouché sur le développement d'une application innovante très importante pour la santé des pièces de fonderie, et pour réaliser des économies, entres autres, de métal.
La technologie, décrite ici, consiste à employer un additif céramique d'alumino-silicate de faible densité (LDASC) qui, soit seul, soit combiné à des produits exothermiques et lié par le procédé boîte froide, permet la fabrication de pièces de différentes géométries. Ils peuvent être utilisés comme manchons traditionnels ou ayant une double fonction: de noyau et en même temps de manchon.
2015-10-09
2015-10-09
2005-03
article
MELENDEZ, Antton; ANGLADA, Eva; BARCENA, Jorge; PRAT, Jaime; IGLESIAS, Luis; ARRIETA, Mitxel; LANDA, Iñaki. Numerical Simulation of Exatcast® core-sleeves for casting of safety critical parts. Fonderie Fondeur D’Aujourd’hui, 243, 13-22, 2005.
0249-3136
http://hdl.handle.net/11556/86
eng
fra
embargoedAccess
Éditions Techniques des Industries de la Fonderie
oai:dsp.tecnalia.com:11556/83
2016-09-02T10:54:51Z
com_11556_1
col_11556_2
Stimulation Discomfort Comparison of Asynchronous and Synchronous Methods with Multi-Field Surface Electrodes
Imatz-Ojanguren, Eukene
Hoffmann, Ulrich
Veneman, Jan
Malešević, Nebojša
Keller, Thierry
Functional Electrical Stimulation (FES) is a technique that artificially stimulates motor nerves in order to restore motor/sensory functions for assistive and therapeutic applications. Recently, multi-field surface electrodes for transcutaneous electrical stimulation have been suggested to overcome problems of single channel surface stimulation. This study compares sensation perceived by 15 healthy subjects on upper limb when two different stimulation methods are applied by means of multi-field electrodes. Asynchronous and synchronous stimulation methods are compared for four different cases: activation of two neighbor fields, three neighbor fields, two distant fields and three distant fields. Two descriptors rated from 1 to 5 are used to describe discomfort: superficial discomfort and deep discomfort. Results expressed no differences in superficial discomfort for any case, but showed significant differences in deep discomfort for distant field activations. In these cases, synchronous stimulation resulted in higher perceived deep discomfort than asynchronous stimulation and affected its efficacy.
2015-10-09
2015-10-09
2013-06
conferenceObject
Proceedings of the 18th International Functional Electrical Stimulation Society (IFESS) Annual Conference 2013
978-86-7466-462-9
http://hdl.handle.net/11556/83
eng
openAccess
oai:dsp.tecnalia.com:11556/74
2017-03-21T08:37:50Z
com_11556_1
col_11556_2
Robotics for Neurorehabilitation: Current State and Future Challenges
Keller, Thierry
Veneman, Jan F.
Currently in neurorehabilitation robotic devices are mostly applied for rehabilitation of the motor functions of the lower and upper extremities. Even if in recent research autonomous and humanoid robots are being used for cognitive rehabilitation robot medicated therapy predominately supports relearning of motor functions for subjects suffering from stroke, spinal cord injury or other neurological conditions. This review paper provides a summary of the main features and applied methods, and presents some examples to outline the large diversity of currently used devices. Future challenges for rehabilitation robotics to reach full clinical acceptance are clear answers regarding the optimal dosage of movement therapy and right inclusion/exclusion criteria for specific treatments.
2015-10-08
2015-10-08
2012-12
article
Applied Mechanics and Materials, Vol. 245, pp. 3-8, Dec. 2012
1662-7482
http://hdl.handle.net/11556/74
10.4028/www.scientific.net/AMM.245.3
eng
embargoedAccess
Trans Tech Publications Ltd.
oai:dsp.tecnalia.com:11556/71
2016-03-07T15:30:10Z
com_11556_1
col_11556_2
Analysis of the upward direct chill casting of magnesium alloys
Landaberea, Aitor
Pedrós, Pablo
Anglada, Eva
Garmendia, Iñaki
The upward direct chill casting, where the continuous casting is operated vertically against the gravity, is a novel technology which has been applied to the production of high quality magnesium alloys circumventing the main disadvantages of using conventional continuous casting processes since the risks of burning and explosion are practically eliminated. This represents a key aspect to increase the industrial application of magnesium wrought products. In order to help on the understanding of the process, a mathematical model for the simulation of the upward continuous casting of round billets of magnesium alloys has been developed. The equations for the flow field with heat transfer are numerically solved by a finite volume method and the solidification is accounted via an enthalpy-porosity formulation where the mushy region is modeled as a pseudo porous medium. The obtained temperature distribution is then used as input for a thermo-mechanical analysis to determine the deformation and stress field developed in the billet during the casting process. Several configurations have been simulated and comparison of computed results with available experimental data is provided
2015-10-08
2015-10-08
2006
conferenceObject
LANDABEREA, Aitor; PEDROS, Pablo; ANGLADA, Eva; GARMENDIA, Iñaki. Analysis of the upward direct chill casting of magnesium alloys. In: GANDIN, C.A (ed.). Proceedings of the Modeling of Casting, Welding and Advanced Solidification Processes – MCWASP XI, Opio (France), 2006. New York (USA): Curran Associates, 2006, 2, 815-822
978-087339629-5
http://hdl.handle.net/11556/71
eng
info:eu-repo/grantAgreement/EC/FP5/G1RD-CT-2002-00761/EU/European magnesium upward continuous caster - development of a magnesium adapted continuous casting device for a great variety of users/EUROMAGUPCASTER
embargoedAccess
Curran Associates
oai:dsp.tecnalia.com:11556/72
2015-10-09T00:00:10Z
com_11556_1
col_11556_2
Improving casting performance through customized insulating shapes and advanced simulation techniques
Prat, Jaime
Meléndez, Antton
Seoane, Alberto
Anglada, Eva
Beeson, Andrew
Arrieta, Mitxel
Galaz, Jon
Jorge, Asier
Vicario, Teresa
Over the years foundries have been looking for ways to improve their process. IBERIA ASHLAND and INASMET TECNALIA, together with BETSAIDE S.A.L. have implemented an innovative solution for methoding castings to ensure the integrity of the finished parts by using their latest development of customized insulating shapes combined with advanced simulation techniques. This study will show how improvements can be achieved in the mechanical characteristics of a casting by eliminating graphite deformation and shrinkage defects through the use of customized sleeves and insulating cores made of advanced moulding materials. Additionally, by utilizing the latest in simulation techniques, various compositions of the insulating materials can be "tested" effectively, allowing us to compare the final casting, without the need and related cost to produce multiple iterations of the part.
2015-10-08
2015-10-08
2007
conferenceObject
PRAT, Jaime; MELENDEZ, Antton; SEOANE, Alberto; ANGLADA, Eva; BEESON Andrew; ARRIETA, Mitxel; GALAZ, Jon; JORGE, Asier; VICARIO, Teresa. Improving casting performance through customized insulating shapes and advanced simulation techniques. In: Proceedings of the 67th World Foundry Congress, Casting the Future, Harrogate (UK), 2006. New York (USA): Curran Associates, 2007, 126-135
9781604236767
http://hdl.handle.net/11556/72
eng
embargoedAccess
Curran Associates
oai:dsp.tecnalia.com:11556/88
2016-05-18T13:46:05Z
com_11556_1
col_11556_2
EXACTHERM®. La mejora de la calidad de las piezas a través de formas aislantes específicas y avanzadas técnicas de simulación (patentado)
Prat, Jaime
Meléndez, Antton
Seoane, Alberto
Anglada, Eva
Beeson, Andrew
Arrieta, Mitxel
Galaz, Jon
Jorge, Asier
Vicario, Teresa
IBERIA ASHLAND e INASMET TECNALIA, implementan con BETSAIDE S.A.L. una solución innovadora para la sanidad de piezas de altos requerimientos de calidad y de geometría difícil, utilizando su último desarrollo en material para manguitos aislantes de óptimo rendimiento (EXACTHERM®). Este estudio nos muestra cómo se pueden conseguir mejoras de características en las piezas fundidas eliminando defectos causados por deformaciones de grafito o rechupes, mediante el uso de manguitos adaptados (Machos-manguito), fabricados con materiales aislantes avanzados. Previamente, utilizando las últimas técnicas de simulación (cálculo inverso), se testearon diversas variantes de estos productos aislantes, lo que permitió obtener y comparar resultados ahorrando el costo en piezas de las iteraciones que habrían sido necesarias en la planta.
2015-10-09
2015-10-09
2006-06
article
PRAT, Jaime; MELENDEZ, Antton; SEOANE, Alberto; ANGLADA, Eva; BEESON, Andrew; ARRIETA, Mitxel; GALAZ, Jon, JORGE, Asier; VICARIO, Teresa. EXACTHERM®. La mejora de la calidad de las piezas a través de formas aislantes específicas y avanzadas técnicas de simulación (patentado). Fundidores, 134, 39-45, junio 2006. Metal Spain
1132–0362
http://hdl.handle.net/11556/88
spa
embargoedAccess
Metal Spain
oai:dsp.tecnalia.com:11556/73
2016-05-18T13:49:53Z
com_11556_1
col_11556_2
Succesful applications in castings using ProCAST Inverse Module
Anglada, Eva
Meléndez, Antton
Adjustment of the metal casting simulation model by means of inverse methods.
2015-10-08
2015-10-08
2006-10
conferenceObject
ANGLADA, Eva; MELENDEZ, Antton. Succesful applications in castings using ProCAST Inverse Module. In: EuroPAM 2006, 16th European Conference and Exhibition on Digital Simulation for Virtual Engineering, Toulouse (France), 2006
http://hdl.handle.net/11556/73
eng
embargoedAccess
ESI Group
oai:dsp.tecnalia.com:11556/76
2016-05-18T13:49:03Z
com_11556_1
col_11556_2
TriboLAB: Características de un Tribómetro para un Experimento de Tribología Espacial en la ISS
Garmendia, Iñaki
Anglada, Eva
Landaberea, Aitor
Vallejo, Haritz
Brizuela, Marta
Martinez, Cesar
Fernandez, Ramón
TriboLAB es un instrumento para la experimentación tribológica en órbita que, junto con otros dispositivos europeos, forma parte de la plataforma EuTEF, la cual se instalará en la Estación Espacial Internacional en Octubre de 2007.
Se presentan las características de este tribómetro en lo referente a aspectos estructurales, montaje, inspección, verificación, operacionales, electrónicos, térmicos y de software.
2015-10-08
2015-10-08
2007-06
conferenceObject
GARMENDIA, Iñaki; ANGLADA, Eva; LANDABEREA, Aitor; VALLEJO, Haritz; BRIZUELA, Marta; MARTINEZ, Cesar; FERNANDEZ, Ramon. TriboLAB: Características de un Tribómetro para un Experimento de Tribología Espacial en la ISS. In: Ibertrib 2007, Congreso Ibérico de Tribología, Bilbao, 2007
http://hdl.handle.net/11556/76
spa
embargoedAccess
Tekniker
oai:dsp.tecnalia.com:11556/77
2016-05-18T13:46:57Z
com_11556_1
col_11556_2
Quality standardization for casting parts of wind power turbines using advanced simulation of the process
Meléndez, Antton
Anglada, Eva
This paper arose from a work on advanced simulation on casting wind powered turbine parts made from high tenacity ductile iron.
The technical target was extracted from the Haizelan Project, carried out with Basque Country Foundrymen's Association (Spanish Foundrymen's Federation), two foundries, TS Fundiciones (Zestoa-Guipúzcoa) and Fundiciones Urbina (Urbina-Álava) as process suppliers and Gamesa Eólica (Huarte-Navarra) as part and geometry supplier.
The study shows it is now possible to obtain highly accurate predictions in pouring and solidification using microstructure calculations simultaneously, and from then on good predictions about final microstructures and subsequent mechanical properties of castings. All related tasks in simulation were performed using FEM (Finite Elemets Method). Referred to metallographic studies and tests, which were done at Inasmet-Tecnalia laboratories.
El presente artículo surge a partir de un trabajo sobre simulación avanzada del proceso de fundición. Por su actualidad, dentro de la fundición se ha elegido un tipo muy singular de piezas como son las grandes piezas de fundición nodular ferrítica de alta tenacidad y alta resistencia a la fatiga fabricadas para aerogeneradores (Norma EN GJS 400 18LT).
Esta parte del trabajo ha sido extraída del proyecto Haizelan, realizado conjuntamente con la Asociación de Fundidores del País Vasco y Navarra, junto con las empresas TS Fundiciones (Zestoa-Guipúzcoa) y Fundiciones Urbina (Urbina-Álava), proveedores de los datos del proceso de fundición y Gamesa Eólica (Huarte-Navarra), propietario de la geometría y de la pieza.
En él, se pone de manifiesto que ahora sí es posible que las herramientas informáticas sean capaces de predecir no solo el proceso de moldeado y conformado líquido, sino también procesos muy especiales y complejos como el de la expansión grafítica. A partir de ahí se puede también predecir con suficiente aproximación estructuras de la matriz metálica y consecuentemente las propiedades mecánicas que estas estructuras confieren a las piezas.
Se ha utilizado una herramienta basada en el Método de Elementos Finitos para toda la fase de simulación, así como los laboratorios de Inasmet-Tecnalia para el estudio metalográfico y los ensayos mecánicos comparativos.
2015-10-08
2015-10-08
2008-05
article
MELÉNDEZ, Antton; ANGLADA, Eva. Quality standardization for casting parts of wind power turbines using advanced simulation of the process. Dyna, 83, 197-206, may 2008.
0012-7361
http://hdl.handle.net/11556/77
spa
embargoedAccess
Federación de Asociaciones de Ingenieros Industriales de España
oai:dsp.tecnalia.com:11556/78
2016-05-18T13:51:21Z
com_11556_1
col_11556_2
Quality Standardization of Big Size Castings for Wind Power Turbines
Anglada, Eva
Meléndez, Antton
This paper starts based on an advanced simulation work about casting parts of wind power turbines made in ductile iron of high tenacity.
The technical goal was extracted from the a research Project, carried out with Basque Country Foundrymen Association (Spanish Foundrymen Federation), two foundries, TS Fundiciones (Zestoa-Guipúzcoa) and Fundiciones Urbina (Urbina-Álava) as process suppliers and GAMESA Eólica (Huarte-Navarra) as part and geometry supplier.
The study shows that nowadays it is already possible to obtain predictions with high accuracy in pouring and solidification simulations using simultaneously microstructure calculations and after these ones good predictions about final microstructures and so the subsequent mechanical properties of the castings.
All concerning tasks in simulation have been made using FEM (Finite Elements Method). Referred to metallographic studies and tests, they were made at Inasmet-TECNALIA laboratories.
2015-10-09
2015-10-09
2008-05
conferenceObject
ANGLADA, Eva; MELENDEZ, Antton. Quality Standardization of Big Size Castings for Wind Power Turbines. In: EuroPAM 2008, 17th European Conference and Exhibition on Simulation Based Design, Prague (Czech Republic), 2008
http://hdl.handle.net/11556/78
eng
embargoedAccess
ESI Group
oai:dsp.tecnalia.com:11556/79
2016-05-18T13:50:40Z
com_11556_1
col_11556_2
Analysis and Control of Induced Stress in Cast Parts
Meléndez, Antton
Anglada, Eva
The objective of this work is to provide an overview about the current possibilities of the application of thermo-structural simulation in the metal casting process, using a commercial casting software. It explores the potential benefits and identifies the main difficulties.
2015-10-09
2015-10-09
2009-05
conferenceObject
MELENDEZ, Antton; ANGLADA, Eva. Analysis and Control of Induced Stress in Cast Parts. In: European Investment Casters' Federation Technical Workshop for foundry engineers – Engineering for Success, San Sebastian (Spain), 2009
http://hdl.handle.net/11556/79
eng
embargoedAccess
European Investment Casters’ Federation
oai:dsp.tecnalia.com:11556/80
2015-10-10T00:00:15Z
com_11556_1
col_11556_2
Thermal Control of Tribolab, a materials experiment in the International Space Station
Garmendia, Iñaki
Anglada, Eva
Vallejo, Haritz
Brizuela, Marta
Insausti, Nagore
Tribolab is a materials tribology experiment that was flown on the International Space
Station (ISS) from February 2008 to September 2009. The main objective of the experiment was the
study of the behaviour of new solid lubricants (alloyed MoS2 with WC) under real space conditions.
The thermal control of the instrument (techniques needed to ensure that the temperature range of the experiment components are adequate in all the mission possible scenarios) was designed, assembled, integrated and tested by a team of engineers of Inasmet-Tecnalia and INTA. The design concept employed, mainly passive thermal control with some active components, is explained in detail. The computational models devised for the design, as well as the different mission scenarios are also explained. The verification and on earth qualification tests are described and the difficulties encountered during the project for the thermal subsystem are also explained. Finally, the real thermal behaviour of the experiment when on space is described, with some post-flight information.
2015-10-09
2015-10-09
2012-05
conferenceObject
GARMENDIA, Iñaki; ANGLADA, Eva; VALLEJO, Haritz; BRIZUELA, Marta; INSAUSTI, Nerea. Thermal Control of Tribolab, a materials experiment in the International Space Station. In: Proceedings of the 50th Anniversary Conference. Engineering, Science and Technology, San Sebastián (Spain), 2012. Pamplona (Spain): Servicio de Publicaciones de la Universidad de Navarra, 2012
978-84-8081-290-0
http://hdl.handle.net/11556/80
eng
embargoedAccess
Servicio de Publicaciones de la Universidad de Navarra
oai:dsp.tecnalia.com:11556/106
2016-01-29T01:00:11Z
com_11556_1
col_11556_2
Adjustment of Numerical Simulation Model to the Investment Casting Process
Anglada, Eva
Meléndez, Antton
Maestro, Laura
Domínguez, Ignacio
This paper presents the adjustment process of a simulation model to improve the correlation between simulation results and parts industrially manufactured. It includes the data registration at foundry plant, the preliminary set-up of the model and the later adjustment process to reach a correlation level according to the industrial necessities.
The adjustment has been performed by means of inverse modelling. This technique uses thermal histories experimentally registered as base, and modifies the material properties and boundary conditions used in simulation until reaching a good correlation between numerical simulated cooling curves and they registered experimentally. The adjustment has been also focused on the shrinkage defects.
The simulation model is a FEM model developed in commercial software specifically focused on metal casting simulation. The case of study is an investment casting process, vacuum poured, of a nickel base superalloy designated Hastelloy X. Usual in the manufacture of components for aeronautical turbines.
2016-01-28
2016-01-28
2013-09
article
ANGLADA, Eva; MELENDEZ, Antton; MAESTRO, Laura; DOMINGUEZ, Ignacio. Adjustment of Numerical Simulation Model to the Investment Casting Process. Procedia Engineering, 63, 75-83, 2013. DOI: 10.1016/j.proeng.2013.08.272
1877-7058
http://hdl.handle.net/11556/106
10.1016/j.proeng.2013.08.272
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Elsevier
oai:dsp.tecnalia.com:11556/105
2016-01-29T01:00:09Z
com_11556_1
col_11556_2
Finite Element Model Correlation of an Investment Casting Process
Anglada, Eva
Meléndez, Antton
Maestro, Laura
Domínguez, Ignacio
The achievement of reliable simulations, in the case of complex processes as is the
investment casting, is not a trivial task. Their accuracy is significantly related with the knowledge of
the material properties and boundary conditions involved, but the estimation of these values usually
is highly complex. One helpful option to try to avoid these difficulties is the use of inverse
modelling techniques, where experimental temperature measurements are used as base to correlate
the simulation models.
The research presented hereafter corresponds to the correlation of a finite element model of the
investment casting process of two nickel base superalloys, Hastelloy X and Inconel 718. The
simulation model has been developed in a commercial software focused specifically on metal
casting simulation. The experimental measurements used as base for the adjustment, have been
performed at industrial facilities. The methodology employed combines the use of an automatic tool
for model correlation with the manual adjustment guided by the researchers.
Results obtained present a good agreement between simulation and experimental measurements,
according to the industrial necessities. The model obtained is valid for the two studied cases with
the only difference of the alloy material properties. The values obtained for the adjusted parameters
in both cases are reasonable compared with bibliographic values. These two circumstances suggest
that the obtained correlation is appropriate and no overfitting problems exist on it.
2016-01-28
2016-01-28
2014-06
article
ANGLADA, Eva; MELENDEZ, Antton; MAESTRO, Laura; DOMINGUEZ, Ignacio. Finite Element Model Correlation of an Investment Casting Process. Materials Science Forum, 797, 105-110, june 2014. DOI: 10.4028/www.scientific.net/MSF.797.105.
0255-5476
http://hdl.handle.net/11556/105
10.4028/www.scientific.net/MSF.797.105
eng
openAccess
Trans Tech Publications
oai:dsp.tecnalia.com:11556/97
2016-01-13T01:00:13Z
com_11556_1
col_11556_2
A Harmonized Compositional Assurance Approach for Safety-Critical Systems
Ruiz, Alejandra
Espinoza, Huascar
Kelly, Tim
Safety-critical systems, those whose failure could end up in loss or injuries to people or the environment, are required to go through laborious and expensive certification processes. These systems have also increased their complexity and as it has already been done in other domains, they have applied component-based system developments to deal with complexity. However, components are difficult to assess as certification is done at system level and not at component level. Compositional certification approach proposes to get incremental credit by accepting that a specific component complies with specific standard’s requirements and it is correctly integrated. The objective is to support integration of new components while the previously integrated components do not need to work for re-acceptance.
We propose (1) the use of assurance modelling techniques to provide us the mechanism to understand the common basis of standards shared by different domains such as the avionics, automotive and the medical devices design.
We propose (2) an assurance decomposition methodology offering guidance and modelling mechanisms to decompose the responsibilities associated with the life-cycle of safety-critical components. This methodology ensures a hierarchy of assurance and certification projects where the responsibilities and project tasks can be specified and its accomplishment can be assessed to determine the compliance of functional safety standards.
Assurance decomposition supports the reuse of components as it guides us not just for standards compliance but specifically on the understanding and tailoring of those standards for component assurance and support when those components are integrated into the final system.
We propose (3) a contract-based approach to support the integration of reused components and at the same time, the proposal supports the identification of assumptions, a very laborious and time consuming task. Assurance Contracts are defined to ensure incremental compliance once the components are integrated. The objective of this assurance contracts is to ensure the overall compliance of the system with the selected standards and reference documents such as guidelines or advisory circulars.
The defined approach to assurance contracts specification attempts to balance the need for unambiguity on the composition while maintaining the heterogeneity of the information managed. The claims classification offers an easy method to support the assessment of contract completeness and the structured expressions provide a semi-formal language to specify the assumptions and guarantees of a component.
This work has been mainly framed in a European collaborative research projects such as OPENCOSS a Large-scale integrating project (IP) with 17 partners from 9 countries to develop a platform for safety assurance and certification of safety-critical systems (compliance with standards, robust argumentation, evidence management, process transparency), SAFEADAPT an FP7 project with 9 partners and RECOMP an ARTEMIS project..
The results of this work have been presented to the standardization group of the Object Management Group responsible for the SACM (Structured Assurance Case Metamodel) standard specification, which currently discusses its inclusion in future versions.
The (4) tools presented and used in this work have been included in the results of an open tool platform developed within the OPENCOSS project that is being released in PolarSys. PolarSys is an Eclipse Industry Working Group created by large industry players and by tools providers to collaborate on the creation and support of Open Source tools for the development of embedded systems.
2016-01-12
2016-01-12
2015-12-16
doctoralThesis
http://hdl.handle.net/11556/97
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Universidad de Deusto
oai:dsp.tecnalia.com:11556/96
2015-12-22T11:33:22Z
com_11556_1
col_11556_2
Prospect of smart home-based detection of subclinical depressive disorders
Leon, Enrique
Montejo, Manuel
Dorronsoro, Iñigo
Aging is associated with changing physical, social, emotional, and financial circumstances that are often new to the elder. The affective distress that stems from coping with them could play a negative effect on the health of seniors and lead to severe cases of depression, an emotional disorder that could lead to fatal consequences. The combination of novel methods of ambulatory detection of emotional states, body area networks providing information from numerous bodily parameters, and sophisticated pervasive technologies offers new possibilities in the detection of and intervention in cases of subclinical depression. In this paper we present the technical aspects and rationale behind systems that can use emotional valence monitoring to quantify prolonged emotional negativity and identify the activities associated with such negativity. We argue that this as a suitable mechanism to facilitate ambient-mediated self-regulation and remote peer-support.
2015-12-22
2015-12-22
2011-05-23
conferenceObject
Leon E., Montejo M., Dorronsoro I. Prospect of smart home-based detection of subclinical depressive disorders. InPervasive Computing Technologies for Healthcare (PervasiveHealth), 2011 5th International Conference on 2011 May 23 (pp. 452-457). IEEE.
978-1-61284-767-2
http://hdl.handle.net/11556/96
eng
embargoedAccess
IEEE
oai:dsp.tecnalia.com:11556/107
2016-01-30T01:00:11Z
com_11556_1
col_11556_2
More robust processes and more added value for foundries based on inverse modelling and tailor-made software tools
Meléndez, Antton
Anglada, Eva
Maestro, Laura
Ignacio, Domínguez
With this work the authors want to show how is possible to approach improved simulations to the results of the user’s plants giving a good solution for the increasing needs of accuracy. In this sense, the authors want to present an innovative experience concerning to a recently finished R&D project, which involved the development of two solutions using and complementing a commercial simulation software. The first of them is an improvement of the conventional simulations based on the use of the inverse modelling and the second one consists of a new ‘ad hoc’ tool developed especially for the customer. Once the project was concluded, as planned, the ‘new current’ simulations resulted well correlated with the plant.
The casting process involved in the project is the investment casting process or lost wax casting process
2016-01-29
2016-01-29
2014-05
conferenceObject
MELENDEZ, Antton; ANGLADA, Eva; MAESTRO, Laura; DOMINGUEZ, Ignacio. More robust processes and more added value for foundries based on inverse modelling and tailor-made software tools. In: Proceedings of the 71st World Foundry Congress, Advanced Sustainable Foundry, Bilbao (Spain), 2014. Bilbao: World Foundry Organization, 2014. ISBN: 978-84-617-0087-5
978-84-617-0087-5
http://hdl.handle.net/11556/107
eng
embargoedAccess
World Foundry Organization
oai:dsp.tecnalia.com:11556/108
2016-02-16T10:00:36Z
com_11556_1
col_11556_2
Development of a simulation procedure for the evaluation of new refractories for aluminium furnaces
Vicario, Iban
de Landía, Leonor
Mendizabal, Gorka
Toledo, Nagore
Anglada, Eva
Rodriguez, Patxi
Refractory materials for aluminium industry are designed to be resistant to different degrees of thermal, mechanical and chemical wear. The refractory wall thickness reduction during service life increases the heat losses through walls decreasing the thermal efficiency of the furnace. Last developments are focused on obtaining refractories with better performance and improved insulation properties.
On this regard, a simulation procedure has been developed to compare the thermal and chemical performance of different refractories during end use. This procedure includes measuring the internal and external wall temperatures of a testing furnace using thermography, and comparing the resistance to liquid aluminium determining the corundum and cracks appearance. Two refractories have been tested by this procedure for comparative purposes; a commercial alumina castable and an improved alumina castable with better insulation properties.
2016-01-29
2016-01-29
2014-05
conferenceObject
VICARIO, Iban; DE LANDIA, Leonor; MENDIZABAL, Gorka; TOLEDO, Nagore; ANGLADA, Eva; RODRIGUEZ, Patxi. Development of a simulation procedure for the evaluation of new refractories for aluminium furnaces. In: Proceedings of the 71st World Foundry Congress, Advanced Sustainable Foundry, Bilbao (Spain), 2014. Bilbao: World Foundry Organization, 2014. ISBN: 978-84-617-0087-5
978-84-617-0087-5
http://hdl.handle.net/11556/108
eng
info:eu-repo/grantAgreement/EC/FP7/246335/EU/New designs of ecological furnaces/EDEFU
openAccess
World Foundry Organization
oai:dsp.tecnalia.com:11556/109
2016-02-05T01:00:09Z
com_11556_1
col_11556_2
The Influence of Activated Coal Mining Wastes on the Mineralogy of blended cement pastes
Frias, Moises
Rodriguez, Olga
Vigil de la Villa, Raquel
Garcia, Rosario
Martinez-Ramirez, Sagrario
Fernandez-Carrasco, Lucia J.
Vegas, Iñigo
In recent years, kaolinite-based wastes are focusing the attention
of researchers to obtain recycled metakaolinite, with consequent
environmental and socioeconomic benefits. One of
these lines of research is based on coal mining waste, which
once activated thermally, it becomes a highly pozzolanic product
(ACM). This study reports the influence of activated carbon
mining waste on the formation and evolution of the
mineralogical phases in the ACM/cement system as well as
their influence on the microstructure up to 90 d of reaction.
Mineralogical analyses clearly show that the addition of ACM
modified mineralogical compounds of blended cements. The
C4AH13 and C4A CH12 were the predominant phases in this
type of cements; while in the ordinary portland cement
cements, portlandite, ettringite, and carboaluminate were main
hydrated phases. Two differential zones in the pore size distribution
of the C–S–H gels at 12 and 4.5 nm were observed, predominating
the formation of C–S–H gels at 12 nm when 20%
of ACM was added to the cement.
2016-02-04
2016-02-04
2016
article
J. Am. Ceram. Soc., 99 [1] 300–307 (2016)
1551-2916
http://hdl.handle.net/11556/109
10.1111/jace.13840
eng
embargoedAccess
The American Ceramic Society
oai:dsp.tecnalia.com:11556/110
2016-02-10T01:00:09Z
com_11556_1
col_11556_2
Joining of ceramic matrix composites to high temperature ceramics for thermal protection systems
Jiménez, C.
Mergia, K.
Lagos, M.A.
Yialouris, P.
Agote, Iñigo
Liedtke, V.
Messoloras, S.
Panayiotatos, Y.
Padovano, E.
Badini, C.
Wilhelmi, C.
Bárcena, Jorge
The current work reports a novel approach for the integration of external protective SIC multilayers with ceramic matrix composite (C-f/SiC) with the view of application in aerospace heat protection systems. The integration method is based on diffusion brazing bonding. As a joining agent the MAX-Phase Ti3SiC2, produced by self-propagating high temperature synthesis, has been employed. The pressure applied during the joining process and its effect on the microstructure of the integrated structure is discussed. Microstructural analysis of the resulting joints is conducted using scanning electron microscopy coupled with energy dispersive spectroscopy and X-ray diffraction measurements. Analysis of the joints showed that the bonds are uniform, dense, with few crack vertical to the interface which are not detrimental for the performance of the joints. Ground re-entry tests showed that the joints survive 5 re-entry cycles at 1391 and 1794 degrees C without any detectable damage. (C) 2015 Elsevier Ltd. All rights reserved.
2016-02-09
2016-02-09
2016-02
article
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Volume: 36, Issue 3, 443-449, 2016
1873-619X
http://hdl.handle.net/11556/110
10.1016/j.jeurceramsoc.2015.09.038
eng
info:eu-repo/grantAgreement/EC/FP7/262749/EU/MULTIFUNCTIONAL COMPONENTS FOR AGRESSIVE ENVIROMENTS IN SPACE APPLICATIONS/SMARTEES
embargoedAccess
ELSEVIER
oai:dsp.tecnalia.com:11556/111
2016-02-10T11:44:31Z
com_11556_1
col_11556_2
Evaluation of Electromechanical Systems Dynamically Emulating a Candidate Hydrokinetic Turbine
Cavagnaro, R.J.
Neely, J.C.
Faÿ, F.-X.
Lopez-Mendia, J.
Rea, J.A.
Implications of conducting hardware-in-the-loop testing of a specific hydrokinetic turbine on controllable motor-generator sets or electromechanical emulation machines (EEMs)are explored. The emulator control dynamic equations are presented, methods for scaling turbine parameters are developed and evaluated, and experimental results are presented from three EEMs programmed to emulate the same vertical-axis fixed-pitch turbine. Although hardware platforms and control implementations varied, results show that each EEM is successful in emulating the turbine model at different power levels, thus demonstrating the general feasibility of the approach. However, performance of motor control under torque command, current command, or speed command differed. In a demonstration of the intended use of an EEM for evaluating a hydrokinetic turbine implementation, a power takeoff controller tracks the maximum power-point of the turbine in response to turbulence. Utilizing realistic inflow conditions and control laws, the emulator dynamic speed response is shown to agree well at low frequencies with numerical simulation but to deviate at high frequencies.
2016-02-10
2016-02-10
2016-01
article
Sustainable Energy, IEEE Transactions on, Volume: 7, Issue: 1, 2016, pp. 390 - 399
1949-3029
http://hdl.handle.net/11556/111
10.1109/TSTE.2015.2492943
eng
embargoedAccess
IEEE
oai:dsp.tecnalia.com:11556/112
2016-02-15T07:58:27Z
com_11556_1
col_11556_2
Methodology for assessing electric vehicle charging infrastructure business models
Madina, Carlos
Zamora, Inmaculada
Zabala, Eduardo
The analysis of economic implications of innovative business models in networked environments, as electro-mobility is, requires a global approach to ensure that all the involved actors obtain a benefit. Although electric vehicles (EVs) provide benefits for the society as a whole, there are a number of hurdles for their widespread adoption, mainly the high investment cost for the EV and for the infrastructure. Therefore, a sound business model must be built up for charging service operators, which allows them to recover their costs while, at the same time, offer EV users a charging price which makes electro-mobility comparable to internal combustion engine vehicles. For that purpose, three scenarios are defined, which present different EV charging alternatives, in terms of charging power and charging station ownership and accessibility. A case study is presented for each scenario and the required charging station usage to have a profitable business model is calculated. We demonstrate that private home charging is likely to be the preferred option for EV users who can charge at home, as it offers a lower total cost of ownership under certain conditions, even today. On the contrary, finding a profitable business case for fast charging requires more intensive infrastructure usage.
2016-02-12
2016-02-12
2016-02
article
Energy Policy, Volume 89, February 2016, Pages 284–293
0301-4215
http://hdl.handle.net/11556/112
10.1016/j.enpol.2015.12.007
eng
info:eu-repo/grantAgreement/EC/FP7/265499/EU/Development and demonstration of a unique and user-friendly framework for green electromobility in Europe/Green eMotion
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
embargoedAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Elsevier Ltd.
oai:dsp.tecnalia.com:11556/142
2016-03-29T12:59:06Z
com_11556_1
col_11556_2
Centroidal Momentum Analysis for Defining a Stability Index for Human-Exoskeleton Interactive Walking : Perturbation Detection in Human Gait
Je Hyung, Jung
Jan, Veneman
Recently, exoskeletons have been in the spotlight as many studies demonstrated the effectiveness of the exoskeletons as a means that enables to not only resolve long-standing issues such as increase of societal burden for the care of ageing populations but also augments productivity in several fields, such as rehabilitation and industrial fields. In particular, lower limb exoskeletons have attracted the medical field, especially related to the ageing society due to its impact on augmentation and recovery of walking capability which is one of the core determinants of independent daily living. For practical use of the lower limb exoskeletons in real environments, however, there are still several issues to be resolved. One of them is how to manage balance of human walking supported by the exoskeleton, in other words, how to monitor walking stability of a system combined with human and exoskeleton and maintain (or recover) the system balance when the user meets unpredicted disturbances, and thus to avoid falls.
The former is a rationale of the study and this paper deals with a ‘stability index’, referred to as a kind of measure to monitor the actual (in)stability state during walking. The proposed stability index is based on the Centroidal Momentum (CM) that consists of linear and angular momenta at the Center of Mass (CoM). CM is a fundamental parameter used to describe physical motion of a system in classical mechanics, and it has been studied widely in biomechanics and bipedal robot fields over the last decade as it, specifically angular momentum-based analysis, offers important clues on how humans maintain balance during walking as well as facilitates postural balance control of humanoid robots in standing.
As an extension of this context, in our previous work, we analyzed CM behavior during human walking under perturbations, specifically lateral perturbations applied to the pelvis. As a continuation of the study, in this paper, we examine whether CM could be used as the stability index to detect the perturbations as well as an initial loss of balance. In other words, a perturbation detection method on the basis of calculation of CM while waking is presented. In the method, variation of CM patterns between unperturbed and perturbed walking plays a crucial role in detecting perturbations. The method has been evaluated with experimental data of human walking and results show that the method is capable of detecting moderate and strong perturbations determined by combination of diverse durations and magnitudes of disturbance force. Average detection time obtained was about 334 msec.
This study was carried out in the context of the EU FP7 project BALANCE that aims at supporting the function of maintaining postural balance directly through a leg exoskeleton. For this purpose CM-based stability index to be developed and related findings will be extended to the exoskeleton cooperating with a human and assessed on performance in
2016-03-03
2016-03-03
2015-10-01
conferenceObject
JE HYUNG JUNG, JAN VENEMAN, Centroidal Momentum Analysis for Defining a Stability Index for Human-Exoskeleton Interactive Walking : Perturbation Detection in Human Gait, 2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) Congress Center Hamburg Sept 28 - Oct 2, 2015. Hamburg, Germany
978-1-4799-9993-4
http://hdl.handle.net/11556/142
eng
info:eu-repo/grantAgreement/EC/FP7/601003/EU/Balance Augmentation in Locomotion, through Anticipative, Natural and Cooperative control of Exoskeletons/BALANCE
openAccess
IEEE Conference Publications
oai:dsp.tecnalia.com:11556/116
2016-02-23T15:16:18Z
com_11556_1
col_11556_2
Fabrication and characterisation of Titanium Matrix Composites obtained using a combination of Self propagating High temperature Synthesis and Spark Plasma Sintering
Lagos, M.A.
Agote, Iñigo
Atxaga, G.
Adarraga, O.
Pambaguian, L.
This work presents a novel processing method for the fabrication of particle reinforced Titanium Matrix Composites (TMCs). TMCs are a promising alternative to improve the mechanical properties of titanium alloys. In the processing method, the reinforcement (TiC–Ti) was obtained by Self-propagating High-temperature Synthesis (SHS). The composition of the reinforcement was Ti1.3C. An excess of titanium compared to the equiatomic TiC was introduced in the reaction in order to control the size of the reinforcement and to improve the compatibility between reinforcement and matrix. This reinforcement was mixed with Ti–6Al–4V powder and the final consolidation of the TMC was performed by Spark Plasma Sintering (SPS). The microstructure and mechanical characterisation of the TMCs are presented. Comparing tensile properties with conventional Ti–6Al–4V alloys, the materials developed in this work present higher young modulus and tensile strength. In addition, in order to study the possible scale up of SPS process for the production of TMCs, the manufacturing of large samples was studied.
2016-02-23
2016-02-23
2016-02-08
article
Materials Science and Engineering: A, Volume 655, 8 February 2016, Pages 44–49
0921-5093
http://hdl.handle.net/11556/116
10.1016/j.msea.2015.12.050
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/118
2016-02-24T01:00:13Z
com_11556_1
col_11556_2
Modeling Innovative Power Take-Off Based on Double-Acting Hydraulic Cylinders Array for Wave Energy Conversion
Antolín-Urbaneja, Juan Carlos
Cortes, A.
Cabanes, Itziar
Estensoro, Patxi
Lasa, Joseba
Marcos, Marga
One of the key systems of a Wave Energy Converter for extraction of wave energy
is the Power Take-Off (PTO) device. This device transforms the mechanical energy of a
moving body into electrical energy. This paper describes the model of an innovative PTO based
on independently activated double-acting hydraulic cylinders array. The model has been
developed using a simulation tool, based on a port-based approach to model hydraulics systems.
The components and subsystems used in the model have been parameterized as real components
and their values experimentally obtained from an existing prototype. In fact, the model takes
into account most of the hydraulic losses of each component. The simulations show the
flexibility to apply different restraining torques to the input movement depending on the
geometrical configuration and the hydraulic cylinders on duty, easily modified by a control
law. The combination of these two actions allows suitable flexibility to adapt the device to
different sea states whilst optimizing the energy extraction. The model has been validated
using a real test bench showing good correlations between simulation and experimental tests
2016-02-23
2016-02-23
2015-03-20
article
Energies 2015, 8, 3, 2230-2267
1996-1073
http://hdl.handle.net/11556/118
10.3390/en8032230
eng
http://creativecommons.org/licenses/by/3.0/es/
openAccess
Attribution 3.0 Spain
MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND
oai:dsp.tecnalia.com:11556/119
2016-02-25T10:41:06Z
com_11556_1
col_11556_2
Compact and cost effective instrument for detecting drug precursors in different environments based on fluorescence polarization
Antolín-Urbaneja, Juan Carlos
Eguizabal, I.
Briz, N.
Dominguez, A.
Estensoro, Patxi
Secchi, A.
Varriale, A.
Di Giovanni, S.
D´Auria, S.
Several techniques for detecting chemical drug precursors have been developed in the last decade. Most of them are able to identify molecules at very low concentration under lab conditions. Other commercial devices are able to detect a fixed number and type of target substances based on a single detection technique providing an absence of flexibility with respect to target compounds. The construction of compact and easy to use detection systems providing screening for a large number of compounds being able to discriminate them with low false alarm rate and high probability of detection is still an open concern. Under CUSTOM project, funded by the European Commission within the FP7, a stand-alone portable sensing device based on multiple techniques is being developed. One of these techniques is based on the LED induced fluorescence polarization to detect Ephedrine and Benzyl Methyl Keton (BMK) as a first approach. This technique is highly selective with respect to the target compounds due to the generation of properly engineered fluorescent proteins which are able to bind the target analytes, as it happens in an “immune-type reaction”.
This paper deals with the advances in the design, construction and validation of the LED induced fluorescence sensor to detect BMK analytes. This sensor includes an analysis module based on high performance LED and PMT detector, a fluidic system to dose suitable quantities of reagents and some printed circuit boards, all of them fixed in a small structure (167mm x 193mm x 228mm) with the capability of working as a stand-alone application.
2016-02-23
2016-02-23
2013
conferenceObject
OPTICAL SENSORS 2013, Proceedings of SPIE, 8774, UNSP 87741J
978-0-8194-9576-1
http://hdl.handle.net/11556/119
10.1117/12.2017257
eng
info:eu-repo/grantAgreement/EC/FP7/242387/EU/Drugs and Precursor Sensing by Complementing Low Cost Multiple Techniques/CUSTOM
embargoedAccess
SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
oai:dsp.tecnalia.com:11556/117
2016-02-24T01:00:13Z
com_11556_1
col_11556_2
Innovative Hydraulic Power Take-Off Construction and Performance Tests for Wave Energy Conversion
Antolín-Urbaneja, Juan Carlos
Lasa, Joseba
Estensoro, Patxi
Cabanes, Itziar
Marcos, Marga
This document describes and demonstrates the features of a new innovative hydraulic
Power take-Off (PTO) to be used for Wave Energy Conversion. This device is able to transform low
frequency oscillating movement into a continuous high frequency angular speed, absorbing high
fluctuated torque at the input shaft, which can reach up to 8000Nm. Moreover, the major
breakthrough of this device is that it can control the braking torque through the modification of some
geometrical parameters, L and R, and through the activation of more than one hydraulic cylinder
together with the pressure. The output shaft of the PTO is able to rotate at different continuous rated
speed through the actuation on a specific control valve at the inlet of the hydraulic motor. Tests to
check the behavior of the PTO related to the smoothening of the power output and concerning the
time needed to increase the high pressure and the time available after the accumulation of some
quantity of energy in different initial conditions are presented.
2016-02-23
2016-02-23
2013
article
J.C. Antolín-Urbaneja, J. Lasa, P. Estensoro, I. Cabanes, M. Marcos, "Innovative Hydraulic Power Take-Off Construction and Performance Tests for Wave Energy Conversion", Applied Mechanics and Materials, Vol. 432, pp. 316-323, 2013
1662-7482
http://hdl.handle.net/11556/117
10.4028/www.scientific.net/AMM.432.316
eng
embargoedAccess
TRANS TECH PUBLICATIONS LTD
oai:dsp.tecnalia.com:11556/122
2016-02-26T01:00:09Z
com_11556_1
col_11556_2
Compact and cost effective instrument for detecting drug precursors in different environments based on fluorescence polarization (Poster)
Antolín-Urbaneja, Juan Carlos
Eguizabal, I.
Briz, N.
Dominguez, A.
Estensoro, Patxi
Secchi, A.
Varriale, A.
Di Giovanni, S.
D´Auria, S.
Several techniques for detecting chemical drug precursors have been developed in the last decade. Most of them are able to identify molecules at very low concentration under lab conditions. Other commercial devices are able to detect a fixed number and type of target substances based on a single detection technique providing an absence of flexibility with respect to target compounds. The construction of compact and easy to use detection systems providing screening for a large number of compounds being able to discriminate them with low false alarm rate and high probability of detection is still an open concern. Under CUSTOM project, funded by the European Commission within the FP7, a stand-alone portable sensing device based on multiple techniques is being developed. One of these techniques is based on the LED induced fluorescence polarization to detect Ephedrine and Benzyl Methyl Keton (BMK) as a first approach. This technique is highly selective with respect to the target compounds due to the generation of properly engineered fluorescent proteins which are able to bind the target analytes, as it happens in an “immune-type reaction”.
This paper deals with the advances in the design, construction and validation of the LED induced fluorescence sensor to detect BMK analytes. This sensor includes an analysis module based on high performance LED and PMT detector, a fluidic system to dose suitable quantities of reagents and some printed circuit boards, all of them fixed in a small structure (167mm x 193mm x 228mm) with the capability of working as a stand-alone application.
2016-02-25
2016-02-25
2013
conferenceObject
Proc. SPIE 8774, Optical Sensors 2013, 87741J (2013);
978-0-8194-9576-1
http://hdl.handle.net/11556/122
eng
info:eu-repo/grantAgreement/EC/FP7/242387/EU/Drugs and Precursor Sensing by Complementing Low Cost Multiple Techniques/CUSTOM
openAccess
SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
oai:dsp.tecnalia.com:11556/121
2016-02-26T01:00:11Z
com_11556_1
col_11556_2
Design, Construction and Testing of a Hydraulic Power Take-Off for Wave Energy Converters
Lasa, Joseba
Antolín-Urbaneja, Juan Carlos
Angulo, Carlos
Estensoro, Patxi
Santos, Maider
Ricci, Pierpaolo
This paper presents the construction, mathematical modeling and testing of a
scaled universal hydraulic Power Take-Off (PTO) device for Wave Energy Converters
(WECs). A specific prototype and test bench were designed and built to carry out the tests.
The results obtained from these tests were used to adjust an in-house mathematical model.
The PTO was initially designed to be coupled to a scaled wave energy capture device with
a low speed and high torque oscillating motion and high power fluctuations. Any Energy
Capture Device (ECD) that fulfils these requirements can be coupled to this PTO, provided
that its scale is adequately defined depending on the rated power of the full scale prototype.
The initial calibration included estimation of the pressure drops in the different
components, the pressurization time of the oil inside the hydraulic cylinders and the
volumetric efficiency of the complete circuit. Since the overall efficiency measured during
the tests ranged from 0.69 to 0.8 and the dynamic performance of the PTO was
satisfactory, the results are really promising and it is believed that this solution might prove
effective in real devices.
2016-02-25
2016-02-25
2012-06
article
Energies 2012, Vol. 5, Issue 6 2030-2052
1996-1073
http://hdl.handle.net/11556/121
10.3390/en5062030
eng
http://creativecommons.org/licenses/by/3.0/es/
openAccess
Attribution 3.0 Spain
MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND
oai:dsp.tecnalia.com:11556/129
2016-09-15T10:26:14Z
com_11556_1
col_11556_2
Assembled PTO based on an array of double-acting hydraulic cylinders for WECs: From Conceptual Design to an Adjusted Detailed Model
Antolín-Urbaneja, Juan Carlos
Cortes, A.
Marcos, Marga
Lasa, Joseba
Estensoro, Patxi
Cabanes, Itziar
All Wave Energy Converters (WECs) based on wave activated bodies comprises a Power Take-
Off (PTO) system among other subsystems like the reaction mechanism, the supervisor of the
system and the electrical generator. One of the most applied PTO systems consists of oil high
pressure hydraulic devices. These devices are able to apply high forces, to store large
quantities of energy through accumulators and to provide smoother power output to the motor
coupled to a generator. In these systems the poor efficiency and the oil leakages contaminating
the environment are considered main drawbacks. Despite of this, they are widely used in
several promising WECs with the aim of optimizing the harvested wave energy along the time.
The initial challenge to absorb an oscillating movement of ±30º at 5rad/s as a maximum angular
speed absorbing up to 16000Nm from a specific WEC, led to the development of a simplified
hydraulic model before manufacturing a PTO prototype to be verified in a Test Bench (Figure 1).
The experimental results of PTO under different conditions have been used to adjust a full
detailed PTO Model using Mathworks® software platform.
This work presents a patented oil high pressure hydraulic PTO prototype based on an array of
four double-acting hydraulic cylinders. This prototype has been designed and completely
modelled as a proof concept at 1:4 scale being able to apply a variable Coulomb type damping
torque through the activation of each hydraulic cylinder independently and through the
modification of geometrical parameters easily. The complete model of the PTO has been
accurately tuned up through adjustment of model parameters using the results of the
experimental tests. This will allow the study of control strategies to optimize the extracted wave
energy from a specific WEC, like point-absorbers.
2016-02-25
2016-02-25
2015-04-22
conferenceObject
2nd Edition Bilbao Marine Energy Week (2015). Poster
http://hdl.handle.net/11556/129
eng
openAccess
Bilbao Marine Energy Week
oai:dsp.tecnalia.com:11556/130
2016-05-18T14:03:21Z
com_11556_1
col_11556_2
A Power Take-Off Behaviour at High Pressure Operation Point, Using Four Double-acting Hydraulic Cylinders Modelled by a Port-based Approach
Antolín-Urbaneja, Juan Carlos
Cortes, A.
Marcos, Marga
Lasa, Joseba
Cabanes, Itziar
This paper deals with the behaviour at high pressure operation points of a hydraulic Power Take-Off (PTO) using a highly detailed model based on four double-acting hydraulic cylinders modelled by a port-based approach. The developed model takes advantage of the availability of basic hydraulic components which can be parameterized based on real ones, including most of the hydraulic losses. With the aim of optimizing the extraction of wave energy, this PTO is able to modify its restraining torque through the independent activation of the hydraulic cylinders located in the primary transmission and modifying some geometrical parameters related to their fixation points respecting to the axis torque. The ultimate objective of this PTO is to provide a wide range of torques that can be modulated by modifying the operating high pressure of the HP accumulator, the combination of the available areas of the double-acting hydraulic cylinder and the location of their fixation points with respect to the applied movement. This factor can help to improve the control of WEC based on activated bodies with the aim to optimize the extraction of wave energy. In this paper an extended simulation results at different operation points and input movements are presented.
2016-02-25
2016-02-25
2015-09
conferenceObject
Proceedings of the 11th European Wave and Tidal Energy Conference 6-11th Sept 2015, Nantes, France
http://hdl.handle.net/11556/130
eng
embargoedAccess
EWTEC
oai:dsp.tecnalia.com:11556/128
2016-05-18T14:01:30Z
com_11556_1
col_11556_2
Construction of a Universal Hydraulic Power Take-Off for Wave Energy Converters. Mathematical Modelling and Validation Testing
Lasa, Joseba
Antolín-Urbaneja, Juan Carlos
Estensoro, Patxi
Angulo, Carlos
Ricci, Pierpaolo
Santos, Maider
This paper presents the construction, mathematical modelling and validation testing of a scaled universal hydraulic Power Take-Off (PTO) device for Wave Energy Converters (WEC). A specific prototype and test bench were designed and built to carry out the validation tests. The results obtained by these tests were used to adjust an in-house mathematical model. The design of the PTO device led to an international patent application.
The PTO was initially designed to be coupled to a scaled wave energy capture device with a low speed and high torque oscillating motion and high power fluctuations. Any energy capture device (ECD) that fulfils these requirements can be coupled to this PTO, provided that its scale is adequately defined depending on the rated power of the full scale prototype.
The initial calibration included estimation of the pressure drops in the different components, the pressurization time of the oil inside the hydraulic cylinders and the volumetric efficiency of the
complete circuit. Since the overall efficiency measured during the tests ranged from 0.69 to 0.8 and the dynamic performance of the PTO was satisfactory, the results are really promising and it is
believed that this solution might prove effective in real devices.
2016-02-25
2016-02-25
2012-09
conferenceObject
Proceedings of the 9th European Wave and Tidal Energy Conference 5-9th Sept 2011, Southampton, UK
http://hdl.handle.net/11556/128
eng
embargoedAccess
EWTEC
oai:dsp.tecnalia.com:11556/127
2016-02-26T01:00:12Z
com_11556_1
col_11556_2
Drugs and precursor sensing by complementing low cost multiple techniques: overview of the European FP7 project CUSTOM
Secchi, A.
Fiorello, Anna Maria
Dispenza, Massimiliano
D´Auria, S.
Varriale, A.
Ulrici, Alessandro
Seeber, Renato
Uotila, Juho
Venditto, Vincenzo
Ciambelli, Paolo
Antolín-Urbaneja, Juan Carlos
Colao, Francesco
Kuusela, Tom
Tittonen, Ilkka
Sievilä, Päivi
Maisons, Gregory
A large number of techniques for drug precursors chemical sensing has been developed in the latest decades. These techniques are able to screen and identify specific molecules even at very low concentration in lab environment, nevertheless the objective to build up a system which proves to be easy to use, compact, able to provide screening over a large number of compounds and discriminate them with low false alarm rate (FA) and high probability of detection (POD) is still an open issue. The project CUSTOM, funded by the European Commission within the FP7, deals with stand alone portable sensing apparatus based on multiple techniques, integrated in a complex system with a complimentary approach. The objective of the project is to achieve an optimum trade-off between opposite requirements: compactness, simplicity, low cost, sensitivity, low false alarm rate and selectivity. The final goal is the realization of an optical sensing platform able to detect traces of drug precursors compounds, such as ephedrine, safrole, acetic anhydride and the Benzyl Methyl Ketone (BMK). This is reached by implementing two main sensing techniques: the fluorescence enhanced by the use of specially developed Organic macro-molecules, and a spectroscopic technique in Mid-IR optical range. The fluorescence is highly selective with respect to the target compounds, because it is based on properly engineered fluorescent proteins which are able to bind the target analytes, as it happens in an 'immune-type' reaction. The spectroscopic technique is based on the Photo-Acoustic effect, enhanced by the use of a widely Tunable Quantum Cascade Laser. Finally, the sensing platform is equipped with an air sampling system including a pre-concentrator module based on asorption desorption cycles of a syndiotactic polystyrene polymer.
2016-02-25
2016-02-25
2012-09
conferenceObject
Proceedings of SPIE, 8545, 85450G, 10.1117/12.973756
978-0-8194-9286-9
http://hdl.handle.net/11556/127
eng
info:eu-repo/grantAgreement/EC/FP7/242387/EU/Drugs and Precursor Sensing by Complementing Low Cost Multiple Techniques/CUSTOM
embargoedAccess
SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
oai:dsp.tecnalia.com:11556/126
2016-02-25T13:57:40Z
com_11556_1
col_11556_2
Toward a Compact Instrument for Detecting Drug Precursors in Different Environments
Terzi, F.
Ulrici, Alessandro
Seeber, Renato
Fiorello, Anna Maria
Dispenza, Massimiliano
Antolín-Urbaneja, Juan Carlos
Kuusela, Tom
D'Auria, Sabato
Tittonen, Ilkka
Colao, Francesco
Menicucci, I.
Nuvoli, M.
Ciambelli, Paolo
Venditto, Vincenzo
Uotila, Juho
Maisons, Gregory
Carras, M.
Secchi, A.
Varriale, A.
Law enforcement agencies world-wide are keenly aware that chemical control is a crucial element to monitor the manufacture and distribution of illegal narcotics and synthetic substances. For this purpose components able to perform chemical identifications in contexts such as custom offices are needed, where inspection of trucks, cars, containers, as well as people and baggage, is required.
Such components should be assembled as simple machines to be employed on-field by custom officers with no specific skill.
In the following the last results of the research project CUSTOM will be presented. The work has been supported by the European Commission under the 7th Framework Programme through the Project SEC-242387: “Drugs and Precursors Sensing by Complementing Low Cost Multiple Techniques” (CUSTOM).
2016-02-25
2016-02-25
2014
bookPart
Volume 162 of the series Lecture Notes in Electrical Engineering pp 89-93, 10.1007/978-1-4614-3860-1_14
978-1-4614-3860-1
http://hdl.handle.net/11556/126
eng
info:eu-repo/grantAgreement/EC/FP7/242387/EU/Drugs and Precursor Sensing by Complementing Low Cost Multiple Techniques/CUSTOM
embargoedAccess
Springer New York
oai:dsp.tecnalia.com:11556/120
2016-02-25T11:04:55Z
com_11556_1
col_11556_2
Optical model for multilayer glazing systems: Application to laminated glass and photovoltaic modules
Baenas, Tomás
Machado, Maider
This article provides theoretical developments broadening the scope of previous optical simulation models for multilayer glazing
systems. The applicability of existing models will be extended through additional characterization of the multilayer optical components
from global spectrophotometric (UV–vis–NIR) measurements. A more complete interlayer film characterization, including reflectivity in
the film–glass interface, will be provided. Singular solutions of the related equation systems will be derived for situations involving components
with very low or null transmissivity. As a contribution to the fundamentals of the formalism, the condition relating the symmetry
of the transmittance of the system with the symmetry of the transmissivity of its optical components will be studied. Finally, with the
extension for the calculation of energy fluxes through the components of a multilayer system, analytical expressions for the components
absorptivity will be derived. These results are particularly useful to quantify differences in energy absorption of the constituents of a
laminated glass, as a tool to define, from the glazing design phase, the thermal and mechanical processing needed for each glazing component.
Additionally, the model provides a procedure for the calculation of the absorptivity of encapsulated photovoltaic cells, which is
directly related to cell efficiency in each particular configuration.
2016-02-24
2016-02-24
2016
article
Solar Energy 125 (2016) 256-266
0038-092X
http://hdl.handle.net/11556/120
10.1016/j.solener.2015.12.027
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/124
2016-02-26T01:00:15Z
com_11556_1
col_11556_2
Round robin performance testing of organic photovoltaic devices
Gevorgyan, Suren A.
Zubillaga, Oihana
Vega de Seoane, José María
Machado, Maider
Parlak, Elif Alturk
Tore, Nesrin
Voroshazi, Eszter
Aernouts, Tom
Müllejans, Harald
Bardizza, Giorgio
Taylor, Nigel
Verhees, Wiljan
Kroon, Jan M.
Morvillo, Pasquale
Minarini, Carla
Roca, Francesco
Castro, Fernando A.
Cros, Stéphane
Lechêne, Balthazar
Trigo, Juan F.
Guillén, Cecilia
Herrero, José
Zimmermann, Birger
Sapkota, Subarna Babu
Veit, Clemens
Würfel, Uli
Tuladhar, Pabitra S.
Durrant, James R.
Winter, Stefan
Rousu, Sanna
Välimäki, Marja
Hinrichs, Volker
Cowan, Sarah R.
Olson, Dana C.
Sommer-Larsen, Peter
Krebs, Frederik C.
This study addresses the issue of poor intercomparability of measurements of organic photovoltaic (OPV)
devices among different laboratories. We present a round robin performance testing of novel OPV devices
among 16 laboratories, organized within the framework of European Research Infrastructure
Project (SOPHIA) and European Energy Research Alliance (EERA). Three types of OPVs with different
structures, dimensions and encapsulations are studied and compared with reference Si solar cells
certified by accredited laboratories. The agreement of the measurements of these among different laboratories
is analyzed by focusing on testing procedures, testing equipment and sample designs. A
number of deviations and pitfalls are revealed and based on the analyses, a set of recommendations are
suggested for improving the agreement among the measurements of such OPV technologies.
2016-02-25
2016-02-25
2014
article
Renewable Energy 63 (2014) 376-387
0960-1481
http://hdl.handle.net/11556/124
10.1016/j.renene.2013.09.034
eng
info:eu-repo/grantAgreement/EC/FP7/262533/EU/ PhotoVoltaic European Research Infrastructure/SOPHIA
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/123
2016-09-15T10:36:04Z
com_11556_1
col_11556_2
Modelo óptico para acristalamientos multicapa
Baenas, Tomás
Machado, Maider
En el caso del vidrio laminado, dadas las múltiples configuraciones que pueden concebirse con propósitos arquitectónicos
varios en la fase de diseño (estéticos, de eficiencia energética, seguridad o aislamiento acústico, principalmente), resulta de
gran utilidad poder disponer de simulaciones computacionales de las propiedades ópticas en función de las propias de sus
constituyentes (sustratos vítreos, láminas poliméricas y capas selectivas a la radiación solar). Los procedimientos para la
determinación por cálculo de las magnitudes de caracterización óptica de este tipo de vidrios se encuentran actualmente
en proceso de normalización por el CEN (Comité Europeo de Normalización). El estudio de vidrios laminados con capa
selectiva interna, en contacto con la lámina polimérica, tiene un valor teórico especialmente significativo, al introducir
reflectividad en el interior del sistema óptico multicapa. En este trabajo se presenta un modelo teórico basado en el método de
matrices de transferencia particularizado para el cálculo de las propiedades ópticas del vidrio laminado con capas externas
e internas. Los resultados de la simulación se comparan con datos experimentales obtenidos mediante espectrofotometría
UV-VIS-NIR.
2016-02-25
2016-02-25
2010
article
Bol. Soc. Esp. Ceram. V. 49, 2, 95-100 (2010)
0366-3175
http://hdl.handle.net/11556/123
spa
openAccess
Boletín de la Sociedad Española de Cerámica y Vidrio
oai:dsp.tecnalia.com:11556/134
2016-02-26T12:17:23Z
com_11556_1
col_11556_2
Correlation of thermal mathematical models for thermal control of space vehicles by means of genetic algorithms
Anglada, Eva
Garmendia, Iñaki
The design of the thermal control system of space vehicles, needed to maintain the equipment components into their admissible range of temperatures, is usually developed by means of thermal mathematical models.
These thermal mathematical models need to be correlated with the equipment real behaviour registered during the thermal test campaign, in order to adapt them to the real state of the vehicle “as built”. The correlation of this type of mathematical models is a very complex task, usually based on manual procedures, which requires a big effort in time and cost. For this reason, the development of methodologies able to perform this correlation automatically, would be a key aspect in the improvement of the space vehicles thermal control design and validation.
The implementation, study and validation of a genetic algorithm able to perform this type of correlation in an automatized way are presented in this paper. The study and validation of the algorithm has been performed based on a simplified model of a real space instrument. The algorithm is able to correlate thermal mathematical models in steady state and transient analyses, and it is also able to perform the simultaneous correlation of several cases, as for example hot and cold cases.
2016-02-26
2016-02-26
2015-03
article
ANGLADA, Eva; GARMENDIA, Iñaki. Correlation of thermal mathematical models for thermal control of space vehicles by means of genetic algorithms. Acta Astronautica, 108, 1-17, march/april 2015. DOI: 10.1016/j.actaastro.2014.11.042
0094-5765
http://hdl.handle.net/11556/134
10.1016/j.actaastro.2014.11.042
eng
embargoedAccess
Elsevier
oai:dsp.tecnalia.com:11556/135
2016-02-27T01:00:11Z
com_11556_1
col_11556_2
A novel procedure for the evaluation of new refractories for aluminium furnaces
Vicario, Iban
de Landía, Leonor
Mendizabal, Gorka
Toledo, Nagore
Anglada, Eva
Rodriguez, Patxi
Refractory materials for aluminium industry are designed to be resistant to different degrees of thermal, mechanical and chemical wear. The refractory wall thickness reduction during service life increases the heat losses through walls, decreasing the thermal efficiency of the furnace. Last developments are focused on obtaining refractories with better performance and improved insulation properties.
On this regard, a novel procedure has been developed to compare the thermal and chemical performance of different refractories. This procedure includes comparing the resistance of the refractory to molten aluminium, determining corundum and cracks appearance, and measuring the internal and external wall temperatures of a testing furnace using thermography. These temperature measurements make possible to estimate the wall thermal conductivity together with its evolution in time and also validate its simulation modelling in order to be used in future furnace designs. Two refractories have been tested by this procedure for comparative purposes; a commercial alumina castable and an improved alumina castable with better insulation properties
2016-02-26
2016-02-26
2015-04
conferenceObject
VICARIO Iban; DE LANDIA, Leonor; MENDIZABAL, Gorka; TOLEDO, Nagore; ANGLADA, Eva; RODRIGUEZ, Patxi. A novel procedure for the evaluation of new refractories for aluminium furnaces. In: SCHERER, Viktor (ed.). Proceedings of the 10th European Conference on Industrial Furnaces and Boilers INFUB-10, Porto (Protugal), 2015. Porto (Portugal): Cenertec - Centro de Energia e Tecnologia, 2015. ISBN: 978-972-99309-7-3.
978-972-99309-7-3
http://hdl.handle.net/11556/135
eng
info:eu-repo/grantAgreement/EC/FP7/246335/EU/New designs of ecological furnaces/EDEFU
openAccess
Cenertec
oai:dsp.tecnalia.com:11556/140
2016-05-18T13:52:03Z
com_11556_1
col_11556_2
Investment Casting Moulds Optimisation by means of Advanced Simulation and instrumented Fibre-wrapped Moulds
Meléndez, Antton
Anglada, Eva
Rodriguez, Pedro P.
Armenteros, Antonio
The simulation models have been adjusted to replicate the real process in future simulations by means of the advanced simulation combined with a planned experimentation carried out in industrial conditions, The simulation models include the presence of fibres (auxiliary materials) and their effects on the moulds and metal according to the number of layers (the use of these materials is crucial for the correct addressing of the solidification, because a proper solidification helps to obtain the technical requirements of the castings, face to achieve the best mould yield).
2016-02-29
2016-02-29
2015-05-12
conferenceObject
MELENDEZ, Antton; ANGLADA, Eva; RODRIGUEZ, P. Pedro; ARMENTEROS, Antonio. Investment Casting Moulds Optimisation by means of Advanced Simulation and instrumented Fibre-wrapped Moulds. In: European Investment Casters’ Federation Technical Workshop for Foundry Engineers - Method Engineering & Process Modelling, Rotherham (UK), 2015
http://hdl.handle.net/11556/140
eng
embargoedAccess
European Investment Casters’ Federation (EICF)
oai:dsp.tecnalia.com:11556/139
2017-02-03T11:33:04Z
com_11556_1
col_11556_2
Adjustment of a High Pressure Die Casting Simulation Model against Experimental Data
Anglada, Eva
Meléndez, Antton
Vicario, Iban
Arratibel, Ernesto
Aguillo, Idoia
In addition to the typical difficulties associated with the numerical simulation of metal casting processes, the special characteristics of the high pressure die casting (HPDC) increase the difficulty of obtaining reliable results.
The process followed to define and adjust one HPDC simulation model against experimental measurements by means of inverse modelling, is presented together with information related with the test campaign. This knowledge may be of interest for other researchers interested in the HPDC simulation and/or in the simulation models adjustment.
The case of study corresponds to the specific case of one variation of the alloy AlSi9Cu3 (in-house developed) and one variation of the H13 steel (in-house developed), used for the mold manufacturing. The simulation models include the mold thermal evolution during the consecutive cycles of the manufacturing process, together with the cavity filling and the later cooling of the alloy.
2016-02-29
2016-02-29
2015-12-25
article
ANGLADA, Eva; MELENDEZ, Antton; VICARIO, Iban; ARRATIBEL, Ernesto; AGUILLO, Idoia. Adjustment of a High Pressure Die Casting Simulation Model against Experimental Data. Procedia Engineering, 132, 966–973, 2015. DOI: 10.1016/j.proeng.2015.12.584
1877-7058
http://hdl.handle.net/11556/139
10.1016/j.proeng.2015.12.584
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Elsevier
oai:dsp.tecnalia.com:11556/136
2017-02-03T11:34:22Z
com_11556_1
col_11556_2
Simplified Models for High Pressure Die Casting Simulation
Anglada, Eva
Meléndez, Antton
Vicario, Iban
Arratibel, Ernesto
Cangas, Gaizka
The simulation of the High Pressure Die Casting (HPDC) process is a complex type of simulation. The industrial procedure is based on consecutive manufacturing cycles that must be taken into account in the simulation. Moreover the part geometries use to be complex and the alloy is injected at really high velocities. All of that usually implies long calculation times that in complex cases can lead to several days.
Sometimes, the circumstances require to have available a fast solution despite involve a loss of accuracy. The work presented hereafter discusses different possibilities to simplify the HPDC simulation models together with their benefits and drawbacks.
The simplified simulation models have been validated against a detailed 3D simulation model, previously correlated with experimental results.
The comparative, shows that the use of simplified models may be a solution that makes possible a big reduction in calculation times maintaining a reasonable level of accuracy.
2016-02-26
2016-02-26
2015
article
ANGLADA, Eva; MELENDEZ, Antton; VICARIO, Iban; ARRATIBEL, Ernesto; CANGAS, Gaizka. Simplified Models for High Pressure Die Casting Simulation. Procedia Engineering, 132, 974–981, 2015. DOI: 10.1016/j.proeng.2015.12.585
1877-7058
http://hdl.handle.net/11556/136
10.1016/j.proeng.2015.12.585
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Elsevier
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