Results 51 to 60 of about 6,609,005 (236)

Etude numérique et expérimentale de l'écoulement autour d'un rotor éolien [PDF]

open access: yes, 2013
An improved model of an actuator surface is proposed, representing the flow around a wind turbine. This model was developed in conjunction with a Navier-Stokes solver using a blade element method for the calculation of power and wake development.
DOBREV, Ivan   +2 more
core   +4 more sources

Differential effects of agricultural expansion on wild bee taxonomic and functional diversity

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Pollinators, especially bees, are in global decline, threatening biodiversity and food security. While intensive agriculture is a primary driver, its impact on bee functional diversity—particularly in the diverse Mediterranean region—remains understudied.
Manuel López‐Aliste   +9 more
wiley   +1 more source

Foraging plasticity and physiological adaptations enable hummingbirds to subsist on dilute nectars

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Hummingbirds frequently feed on small volumes (<30 μL) of sucrose‐rich nectars. Climate change is expected to affect both the abundance and the concentrations of accumulated nectar.
Rosalee L. Elting   +5 more
wiley   +1 more source

Determinación experimental de la curva de la DBO5 y el valor de las constantes K y Lo en una muestra de agua contaminada del río Bogotá

open access: yesCiencia e Ingeniería Neogranadina, 2001
Con el objeto de llevar a la práctica los conceptos teóricos de la DBO5 del curso de Fundamentos de Ingeniería Ambiental; los estudiantes de séptimo semestre de Ingeniería Civil (I semestre/01) junto con la profesora realizaron en el laboratorio de aguas
Julia Sierra Plazas
doaj   +1 more source

Childhoods and play: Facebook, exhibition and competition [PDF]

open access: yes, 2014
L'objectif de ce document vise à explorer les relations entre le jeu et les enfants dans le contexte contemporain. L'article considère le jeu d'enfants comme pratique significative à partir des nouvelles technologies de l'information et de la ...
Duek, Sara Carolina
core  

Human capital and regional wage gaps [PDF]

open access: yes, 2009
This paper uses micro-level data to analyse the effect of human capital on regional wage differentials. The results for the set of Spanish regions confirm that they differ in the endowment of human capital, but also that the return that individuals ...
López Bazo, Enrique   +1 more
core   +2 more sources

Towards an anthropology of acquisition: ‘How did you get that?’ Vers une anthropologie de l'acquisition : « Où as‐tu trouvé ça ? »

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
The production‐distribution‐consumption triad has structured how anthropologists understand exchange for roughly a century. This article argues for expanding this triad to include an explicit focus on acquisition – the systems, processes, and practices of acquiring.
Hanna Garth
wiley   +1 more source

Laisser partir

open access: yesAcquis de conscience, 2019
L’euthanasie fait débat. Cela fait vingt ans que des législations françaises entretiennent l'espoir de partir dignement chez ceux que la maladie condamne. Plusieurs ont pourtant fui en Belgique ou en Suisse. D&rsquoautres ont eu moins de chance. Ils sont morts seuls, suicidés. Philippe Bataille raconte leur combat et celui de leurs proches.
openaire   +4 more sources

El fragmento 48 del Protréptico de Aristóteles a la luz de Sobre las ideas: ¿vocabulario platónico o concepciones platónicas?

open access: yesClassica, Revista Brasileira de Estudos Clássicos, 2016
El objetivo de este trabajo es analizar el fragmento 48 del Protréptico teniendo como telón de fondo alguna de las críticas que Aristóteles presentó contra los principios platónicos en Sobre las Ideas. Creemos que, si bien el fragmento 48 del Protréptico
Claudia Seggiaro
doaj   +1 more source

Satellite imagery fusion with an equalized trade-off between spectral and spatial quality [PDF]

open access: yes, 2010
En este trabajo se propone una estrategia para obtener imágenes fusionadas con calidad espacial y espectral equilibradas. Esta estrategia está basada en una representación conjunta MultiDirección-MultiRresolución (MDMR), definida a partir de un banco de ...
Gonzalo Martín, Consuelo   +1 more
core   +1 more source

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