Results 51 to 60 of about 1,174,934 (304)

Rendimiento de bases de datos columnares

open access: yesIngenius: Revista de Ciencia y Tecnología, 2019
En la actualidad para el éxito de las empresas es decisiva la capacidad de procesar de manera eficiente una considerable cantidad de datos de una amplia gama de fuentes en cualquier lugar y momento.
Mario Raul Morales-Morales   +3 more
doaj   +1 more source

Bases de Datos para Intervenciones de Usuarios Técnicos [PDF]

open access: yes, 2010
Aquest document complementa les subtasques 2.4.2, 2.4.3 i 2.4.4 relacionades amb els Informes dels estudis de viabilitat constructiva, els resultats de la intervenció i la validació de la intervenció, proporcionant el nexe lògic entre la caracterització ...
Institut Universitari d'Estudis Europeus. ACCEPLAN   +1 more
core   +1 more source

Comprehensive Analysis of the Degradation Phenomena of Proton Exchange Membrane Water Electrolyzers with Iridium on Antimony Tin Oxide Anodes

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study examines the structural and chemical evolution of low‐loaded Ir/ATO anodes during PEM water electrolysis under realistic conditions. Iridium dissolution is largely suppressed. In the early stages, both ionomer and support degradation are detected. Morphological reorganization occurs at the interface between the anode catalyst layer (ACL) and
Sambal Shashank Ambu   +11 more
wiley   +1 more source

Bases de datos en la enseñanza [PDF]

open access: yes, 1998
A lo largo de este artículo se realizan algunas propuestas de enseñanza que tratan de responder a las demandas que actualmente reclama la sociedad a los centros educativos, en lo que se refiere a la actualización y tratamiento de la información ( su ...
Pascual Sevillano, María Ángeles
core  

One‐Step Synthesis of Si–Graphene Heterostructures via in‐Flight Gas‐Phase Mixing for High‐Capacity Silicon‐Rich Anodes

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A one‐step gas‐phase synthesis directly assembles amorphous Si nanoparticles with few‐layer graphene heterostructures via in‐flight mixing. Compositions with only 15 wt.% FLG deliver ~2800 mAh g−1 (Si + FLG) at 0.05 C and retain ~1400 mAh g−1 after 100 cycles at a high cycling rate of 1 C, enabled by a percolated, strain‐buffering graphene network that
Muhammad Ali   +5 more
wiley   +1 more source

Databases spatiotemporal taxonomy with moving objects. Theme review

open access: yesTecnura, 2018
Context: In the last decade, databases have evolved so much that we no longer speak only of spatial databases, but also of spatial and temporal databases.
Sergio Alejandro Rojas Barbosa
doaj   +1 more source

Policy Networks and Policy Entrepreneurship in the EU: Explaining Structural Policy Change in Pharmaceutical Innovation Incentives and Health Technology Assessment

open access: yesEuropean Policy Analysis, EarlyView.
ABSTRACT Policy process research has excelled in explaining structural policy change within national settings, but extensions and applications to the EU level have long proven challenging for scholars. Given that the EU is currently experiencing its longest period of Treaty stability since the 1980s—having evolved into a sui generis political system ...
Vassilis Karokis‐Mavrikos
wiley   +1 more source

COMPORTAMIENTO DEL EVALUADOR DE PARTICIONES EN BASES DE DATOS DISTRIBUIDAS ORIENTADAS A OBJETOS

open access: yesIngeniería, 2011
Las bases de datos distribuidas orientadas a objetos presentan dificultades en el proceso de fragmentación no existen criterios claros acerca de cómo evaluar la bondad de una fragmentación con respecto a otra.
Elzbieta Malinowski Gadja
doaj   +1 more source

Bases de datos relacionales difusas [PDF]

open access: yes, 2015
Treball final de Grau en Matemàtica Computacional. Codi: MT1030. Curs acadèmic 2014-2015Este documento consta de dos partes, primero presenta un informe de la estancia en pr acticas donde se especi can los objetivos y las tareas realizadas ...
Sanchis Mínguez, Delia
core  

Impacts of Social Assistance During the COVID‐19 Pandemic in Poor Remote Communities

open access: yesJournal of International Development, EarlyView.
ABSTRACT Providing social assistance to poor populations in remote communities in times of crises, such as pandemics, is challenging but crucial. This paper examines how food assistance during the COVID‐19 pandemic affected people's behaviour, using our surveys among over 400 rural communities without road access in the Peruvian Amazon. Food assistance
Yoshito Takasaki   +2 more
wiley   +1 more source

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