Results 21 to 30 of about 244,274 (164)

INFLUENCIA DE LA MASA, LA RIGIDEZ Y EL AMORTIGUAMIENTO EN LA DINÁMICA DE AMORTIGUADORES DE MASA SINTONIZADOS

open access: yesRevista Centro Azúcar, 2023
Introducción: La reducción de las vibraciones en estructuras longevas y carentes de mantenimiento como los puentes de ferrocarril en Cuba, es un tema que actualmente va cobrando importancia.
César A. Chagoyen Méndez   +5 more
doaj  

Intervención en el alojamiento con criterios ecológicos

open access: yesCuadernos de Investigación Urbanística, 2016
Resumen Las evidencias del impacto sobre el medio ambiente asociado al funcionamiento de las ciudades hacen que sea urgente proponer medidas que reduzcan este consumo y mejoren la eficiencia del metabolismo urbano.
Gloria Gómez Muñoz
doaj   +1 more source

Intraspecific plant chemodiversity at plot level has contrasting effects on arthropod functional groups

open access: yesFunctional Ecology, Volume 39, Issue 12, Page 3732-3750, December 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant chemistry mediates interactions between plants and their environment. While intraspecific chemodiversity at the individual plant level is well studied, the effects of chemodiversity at the plant community level on arthropod interactions need more attention.
Lina Ojeda‐Prieto   +3 more
wiley   +1 more source

Estudio de las deformaciones resilientes de los materiales granulares sueltos utilizados en capas de base de carreteras [PDF]

open access: yes, 2001
Este congreso tivo lugar en París do 11 ao 15 de xuño de ...
Medina-Rodríguez, Luis   +3 more
core  

Disentangling seed availability and establishment filters at alpine treelines through a decade‐long field manipulation

open access: yesJournal of Ecology, Volume 113, Issue 12, Page 3830-3844, December 2025.
Treeline advance under warming occurs only when multiple filters align—adequate seed supply, favourable microclimatic windows, moderated herbivory and shrub effects that remain facilitative rather than competitive. Abstract Climate warming is expected to increase upslope shifts of alpine treelines globally.
Wentao Lin   +2 more
wiley   +1 more source

MODELADO DE LA MICRODUREZA DE MATERIALES COMPUESTOS

open access: yesAnales (Asociación Física Argentina), 2005
La microdureza de los materiales compuestos de matriz metálica está afectada por la presencia de partículas de refuerzo en la subsuperficie del material.
M. R. Rosenberger   +2 more
doaj  

Modelo para el control presupuestal en obras civiles [PDF]

open access: yes, 2017
Trabajo de investigaciónEs un modelo para el control de obra en micro, pequeña y medianas empresas, que permite medir los gastos vs lo facturado en cada una de las dependencias existentes en el proyecto.
Escobar-Amézquita, Dubier Ricardo   +1 more
core  

Resource suitability drives low use of avian‐excavated tree cavities: A multi‐state occupancy dynamics approach

open access: yesJournal of Animal Ecology, Volume 94, Issue 11, Page 2295-2307, November 2025.
Birds that nest in tree cavities are sometimes dependent on a few cavity‐excavating bird species to make nesting sites available. Such interdependency, however, does not always materialize because excavated cavities may be unsuitable for continued use, even when available for several years after excavation.
Diego Jhoel Zavala   +6 more
wiley   +1 more source

Modelo unificado de curvas de degradación del módulo cortante en arenas del río Guayuriba

open access: yesDyna, 2014
El propósito de este artículo es analizar la aplicabilidad de dos modelos unificados de curvas de degradación del módulo cortante en la arena del río Guayuriba (Departamento del Meta, Colombia).
María del Pilar Ortiz-Pulido   +2 more
doaj  

New opportunities, new challenges: Harnessing Cuba’s advances in agroecology and sustainable agriculture in the context of changing relations with the United States

open access: yesElementa: Science of the Anthropocene, 2018
Cuba’s transition to agroecology is perhaps as widely known as it is misunderstood. In response to the economic crisis of the early 1990s, the Cuban agricultural sector largely departed from the industrial model of food production that it had previously ...
Margarita Fernandez   +9 more
doaj   +1 more source

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