Browsing by Author "Fernandez, M."
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Item Analysis of the conditions to manufacture a MWCNT buckypaper/benzoxazine nanocomposite(2012-02-28) Chapartegui, M.; Barcena, J.; Irastorza, X.; Elizetxea, C.; Fernandez, M.; Santamaria, A.; POLIMEROS; EXTREMAT; COMPOSITEA study of the requirements necessary to fabricate novel MWCNT buckypaper/benzoxazine nanocomposites, based on rheological results, is presented. Best conditions to infiltrate the resin, without any diluents, in the buckypaper are selected from viscosity data obtained under time-temperature cycles. Infiltration results are analyzed using SEM microphotographs. The nanocomposite is obtained after an adequate curing process of the benzoxazine impregnated buckypaper. The mechanical and electrical properties of the nanocomposite are investigated. The obtained electrical conductivity values are several orders of magnitude larger than the values reported for conventional CNT/polymer nanocomposites.Item Assessment of two complementary influenza surveillance systems: Sentinel primary care influenza-like illness versus severe hospitalized laboratory-confirmed influenza using the moving epidemic method(2019-08-13) Torner, Núria; Basile, Luca; Martínez, Ana; Rius, Cristina; Godoy, Pere; Jané, Mireia; Domínguez, Ángela; Aizpurua, J.; Alonso, J.; Azemar, J.; Aizpurua, P.; Ardaya, P. M.; Basas, M. D.; Batalla, J.; Biendicho, P.; Bonet, M.; Callado, M.; Campos, S.; Casanovas, J. M.; Ciurana, E.; Clapes, M.; Cots, J. M.; De La Rica, D.; Domingo, I.; Elizalde, G.; Escapa, P.; Fajardo, S.; Fau, E.; Fernandez, O.; Fernandez, M.; Ferrer, C.; Forcada, A.; Fos, E.; Gadea, G.; Garcia, J.; Garcia, R.; Gatius, C.; Gelado, M. J.; Grau, M.; Grivé, M.; Guzman, M. C.; Hernández, R.; Jimenez, G.; Juscafresa, A.; Llussa, A. M.; López, C.; Kristensen, L.; MacIà, E.; Mainou, A.; Marco, E.; Martínez, M.; Martínez, J. G.; Marulanda, K. V.; Masa, R.; Moncosí, X.; Naranjo, M. A.; Navarro, D.; Ortolà, E.; París, F.; Pérez, M. M.; Pozo, C.; Pujol, R.; Ribatallada, A.; Ruiz, G.; Sabaté, S.; Sanchez, R.; Sarrà, N.; Tarragó, E.; Teixidó, A. M.; Torres, A.; Valén, E.; Van Esso, D.; Van Tarjcwick, C.; Vink Schoenholzer, R.; Zabala, E.; Marcos, M. A.; Mosquera, M. D.M.; De Molina, P.; Rubio, E.; Isanta, R.; Anton, A.; Pumarola, T.; Vilella, A.; Gorrindo, P.; Espejo, E.; Andrés, M.; Barcenilla, F.; Navarro, G.; Barrabeig, I.; Pou, J.; Alvarez, P.; Plasencia, E.; Rebull, J.; Sala, M. R.; Riera, M.; Camps, N.; Follia, N.; Oller, A.; Godoy, P.; Bach, P.; Rius, C.; Hernández, R.; Perez, R.; Torra, R.; Carol, M.; Minguell, S.; Marce, R.; Garcia-Pardo, G.; Olona, M.; Alvarez, A.; Ramon, J. M.; Mòdol, J. M.; Mena, G.; Campins, M.; Massuet, C.; Tora, G.; Ferràs, J.; Ferrús, G.; Tecnalia Research & InnovationBackground: Monitoring seasonal influenza epidemics is the corner stone to epidemiological surveillance of acute respiratory virus infections worldwide. This work aims to compare two sentinel surveillance systems within the Daily Acute Respiratory Infection Information System of Catalonia (PIDIRAC), the primary care ILI and Influenza confirmed samples from primary care (PIDIRAC-ILI and PIDIRAC-FLU) and the severe hospitalized laboratory confirmed influenza system (SHLCI), in regard to how they behave in the forecasting of epidemic onset and severity allowing for healthcare preparedness. Methods: Epidemiological study carried out during seven influenza seasons (2010-2017) in Catalonia, with data from influenza sentinel surveillance of primary care physicians reporting ILI along with laboratory confirmation of influenza from systematic sampling of ILI cases and 12 hospitals that provided data on severe hospitalized cases with laboratory-confirmed influenza (SHLCI-FLU). Epidemic thresholds for ILI and SHLCI-FLU (overall) as well as influenza A (SHLCI-FLUA) and influenza B (SHLCI-FLUB) incidence rates were assessed by the Moving Epidemics Method. Results: Epidemic thresholds for primary care sentinel surveillance influenza-like illness (PIDIRAC-ILI) incidence rates ranged from 83.65 to 503.92 per 100.000 h. Paired incidence rate curves for SHLCI-FLU/PIDIRAC-ILI and SHLCI-FLUA/PIDIRAC-FLUA showed best correlation index' (0.805 and 0.724 respectively). Assessing delay in reaching epidemic level, PIDIRAC-ILI source forecasts an average of 1.6 weeks before the rest of sources paired. Differences are higher when SHLCI cases are paired to PIDIRAC-ILI and PIDIRAC-FLUB although statistical significance was observed only for SHLCI-FLU/PIDIRAC-ILI (p-value Wilcoxon test = 0.039). Conclusions: The combined ILI and confirmed influenza from primary care along with the severe hospitalized laboratory confirmed influenza data from PIDIRAC sentinel surveillance system provides timely and accurate syndromic and virological surveillance of influenza from the community level to hospitalization of severe cases.Item Specific rheological and electrical features of carbon nanotube dispersions in an epoxy matrix(2010-05) Chapartegui, M.; Markaide, N.; Florez, S.; Elizetxea, C.; Fernandez, M.; Santamaría, A.; POLIMEROSThe rheological analysis of epoxy pre-polymer/MWCNT dispersions indicates that a physical network is formed. This is destroyed with an imposed shear, giving a viscoplastic and shear thinning behavior. Such destruction is not reflected in dynamic viscoelastic experiments, due to the very rapid recovery of the MWCNT network in the pre-polymer matrix. This responds to the observed lower electrical than rheological percolation threshold. Electrical conductivity results fulfill electron hopping/tunnelling mechanism, which implies a tube-tube distance close to 5. nm. However, rheological percolation requires nanotubes should touch each other, since no polymer chains are implied in the network.