19 research outputs found
Nanofiber-based filters as novel barrier systems for nanomaterial exposure scenarios
In this article our latest advances in the development of efficient barrier systems against micro- and nano-particulate materials are presented. Nanofibrous polyamide 6 (PA6) mats were fabricated by electrospinning onto a nonwoven viscose substrate. The influence of electrospinning parameters including solution concentration, viscosity, and conductivity, were studied for the production of nonwovens with different fiber size distribution ranging from 74 to 261 nm in diameters. Moreover, the formation of nanowebs (30-40 nm) which are widely distributed among fibers was observed. By varying several process parameters, membranes with different thickness of the nanofiber layer and therefore air permeability and nanoparticle filtration efficiency were obtained.The financial support of this work was provided by MICINN (Spanish Ministry of Science and
Innovation) and ERDF (European Regional Development Fund) (ref: PSE-420000-2008-003)
Evolution of RFID applications in construction:A literature review
Radio frequency identification (RFID) technology has been widely used in the field of construction during the last two decades. Basically, RFID facilitates the control on a wide variety of processes in different stages of the lifecycle of a building, from its conception to its inhabitance. The main objective of this paper is to present a review of RFID applications in the construction industry, pointing out the existing developments, limitations and gaps. The paper presents the establishment of the RFID technology in four main stages of the lifecycle of a facility: planning and design, construction and commission and operation and maintenance. Concerning this last stage, an RFID application aiming to facilitate the identification of pieces of furniture in scanned inhabited environments is presented. Conclusions and future advances are presented at the end of the paper
Free-standing graphene films embedded in epoxy resin with enhanced thermal properties
The poor thermal conductivity of polymer composites has long been a deterrent to their increased use in high-end aerospace or defence applications. This study describes a new approach for the incorporation of graphene in an epoxy resin, through the addition of graphene as free-standing film in the polymeric matrix. The electrical and thermal conductivity of composites embedding two different free-standing graphene films was compared to composites with embedded carbon nanotube buckypapers (CNT-BP). Considerably higher thermal conductivity values than those achieved with conventional dispersing methods of graphene or CNTs in epoxy resins were obtained. The characterisation was complemented with a study of the structure at the microscale by cross-sectional scanning electron microscopy (SEM) images and a thermogravimetric analysis (TGA). The films are preconditioned in order to incorporate them into the composites, and the complete manufacturing process proposed allows the production and processing of these materials in large batches. The high thermal conductivity obtained for the composites opens the way for their use in demanding thermal management applications, such as electronic enclosures or platforms facing critical temperature loads.European Defence Agency tender No 17.ESI.OP.066. Study on the Impact of Graphene on Defence Application
nanoSTAIR: a new strategic proposal to impulse standardization in nanotechnology research
Nanotechnology is considered one of the key technologies of the 21st century within Europe and a Key-Enabling Technology (KET) by Horizon 2020. Standardization has been identified in H2020 as one of the innovation-support measures by bridging the gap between research and the market, and helping the fast and easy transfer of research results to the European and international market. The development of new and improved standards requires high quality technical information, creating a fundamental interdependency between the standardization and research communities. In the frame of project nanoSTAIR (GA 319092), the present paper describes the European scenario on research and standardization in nanotechnology and presents a proposal of a European strategy (nanoSTAIR) to impulse direct "pipelines" between research and standardization. In addition, strategic actions focused on integration of standardization in the R&D projects, from the early stages of the design of a future business (Project Proposal), are also described.European Commission, through the Seventh Framework Programme (GA 319092)
Strategies, methods and tools for managing nanorisks in construction
This paper presents a general overview of the work carried out by European project SCAFFOLD (GA 280535) during its 30 months of life, with special emphasis on risk management component. The research conducted by SCAFFOLD is focused on the European construction sector and considers 5 types of nanomaterials (TiO2, SiO2, carbon nanofibres, cellulose nanofibers and nanoclays), 6 construction applications (Depollutant mortars, selfcompacting concretes, coatings, self-cleaning coatings, fire resistant panels and insulation materials) and 26 exposure scenarios, including lab, pilot and industrial scales. The document focuses on the structure, content and operation modes of the Risk Management Toolkit developed by the project to facilitate the implementation of "nano-management" in construction companies. The tool deploys and integrated approach OHSAS 18001 - ISO 31000 and is currently being validated on 5 industrial case studies.Research carried out by project SCAFFOLD was made possible thanks to funding from the European
Commission, through the Seventh Framework Programme (GA 280535
Revista de Vertebrados de la Estaci贸n Biol贸gica de Do帽ana
Tiempo y orden de aparici贸n de las escamas en el salm贸n del Atl谩ntico (Salmo salar)Estudios sobre el sapo corredor (Bufo calamita) en el sur de Espa帽a.III. Reproducci贸nInfluencia de las carecter铆sticas del medio acu谩tico sobre las poblaciones de larvas de anfibios en lala Reserva Biol贸gica de Do帽ana(Huelva, Espa帽aDieta de la cig眉e帽uela (Himantopus himantopus) en las salinas del estuario del GuadianaOrientaci贸n y selecci贸n del lugar del nido en el gorri贸n moruno (Passer hispaniolensis)la avifauna de las Vegas Bajas del Guadianala reproducci贸n de la malvas铆a (Oxyura leucocephala) en el sur de la provincia de C贸rdoba, Espa帽a.La alimentaci贸n de la curruca cabecinegra (Sylvia melanocephala, Gmelin 1788) en olivares de la provincia de Ja茅n (oto帽o-invierno)Consideraciones sobre el efecto de los conejos y los grandes herb铆voros en los pastizales de la Vera de Do帽anaAn谩lisis factorial de las expresiones faciales del babuino sagrado (Papio hamadryas)Contaminaci贸n xenobi贸tica del Parque Nacionalde Do帽ana. II. Residuos de insecticidas organoclorados, bifenilos policlorados, (PGBs) y metales pesados en Falconiformes y StrigiformesTransferencia total y del y bioacumulaci贸n de mercurio y metilmercurio en ecosistemas del Parque Nacional de Do帽anaNota sobre la alimentaci贸n de larvas de anfibios: I. Pleurodeles waltl en charcas temporaleNota sobre nuevas especies parasitada por el cr铆alo (Clamator glandarius) en Espa帽aEstructura de la jerarquizaci贸n en la predaci贸n de huevos y pichones en Spheniscus magellanicusPasser domesticus, nueva specie para Bolivia驴Est谩n realmente subalimentados los cern铆calos primilla en el valle del Guadalquivir durante el periodo no reproductor?.Nidificaci贸n del pai帽o com煤n (Hydrobates pelagicus) en las Islas Canarias.Nuevos datos sobre la presencia del vis贸n europeo (Mustela lutreola L.) en NavarraLa poblaci贸n de gamos del Parque Nacional de Do帽ana en 1979Puntualizaci贸n a la nota "predacci贸n de Falco peregrino y Falco subbuteo sobre quir贸pteros" de Aymerich y Garc铆a de Castro aparecida en el vol. 9 de esta revista.Peer reviewe
Registro Espa帽ol de Trasplante Cardiaco. XXXI Informe Oficial de la Asociaci贸n de Insuficiencia Cardiaca de la Sociedad Espa帽ola de Cardiolog铆a
Introducci贸n y objetivos
Se presentan las caracter铆sticas cl铆nicas y los resultados de los trasplantes cardiacos realizados en Espa帽a con la actualizaci贸n correspondiente a 2019.
M茅todos
Se describen las caracter铆sticas cl铆nicas y los resultados de los trasplantes cardiacos realizados en 2019, as铆 como las tendencias de estos en el periodo 2010-2018.
Resultados
En 2019 se realizaron 300 trasplantes (8.794 desde 1984; 2.745 entre 2010 y 2019). Respecto a a帽os previos, los cambios m谩s llamativos son el descenso hasta el 38% de los trasplantes realizados en c贸digo urgente, y la consolidaci贸n en el cambio de asistencia circulatoria pretrasplante, con la pr谩ctica desaparici贸n del bal贸n de contrapulsaci贸n (0, 7%), la estabilizaci贸n del uso del oxigenador extracorp贸reo de membrana (9, 6%) y el aumento de los dispositivos de asistencia ventricular (29%). La supervivencia en el trienio 2016-2018 es similar a la del trienio 2013-2015 (p = 0, 34), y ambas mejores que la del trienio 2010-2012 (p = 0, 002 y p = 0, 01 respectivamente).
Conclusiones
Se mantienen estables tanto la actividad del trasplante cardiaco en Espa帽a como los resultados en supervivencia en los 煤ltimos 2 trienios. Hay una tendencia a realizar menos trasplantes urgentes, la mayor铆a con dispositivos de asistencia ventricular.
Introduction and objectives: The present report describes the clinical characteristics and outcomes of heart transplants in Spain and updates the data to 2019.
Methods: We describe the clinical characteristics and outcomes of heart transplants performed in Spain in 2019, as well as trends in this procedure from 2010 to 2018.
Results: In 2019, 300 transplants were performed (8794 since 1984; 2745 between 2010 and 2019). Compared with previous years, the most notable findings were the decreasing rate of urgent transplants (38%), and the consolidation of the type of circulatory support prior to transplant, with an almost complete disappearance of counterpulsation balloon (0.7%), stabilization in the use of extracorporeal membrane oxygenation (9.6%), and an increase in the use of ventricular assist devices (29.0%). Survival from 2016 to 2018 was similar to that from 2013 to 2015 (P = .34). Survival in both these periods was better than that from 2010 to 2012 (P = .002 and P = .01, respectively).
Conclusions: Heart transplant activity has remained stable during the last few years, as have outcomes (in terms of survival). There has been a trend to a lower rate of urgent transplants and to a higher use of ventricular assist devices prior to transplant
User-Friendly Surveying Techniques for Location-aware Systems.
Many location-aware applications rely on data from fine-grained location systems. During deployment such systems require a survey, specifying the locations of their environment-based components. Most current surveying methods are time-consuming, and require costly and bulky equipment. This paper presents the concept of self-surveying, i.e. methods by which a location system can survey itself. Such methods are user-friendly, fast, and require little or no extra equipment. Experimental results show self-survey accuracies comparable to the accuracy of the underlying location system