Results 31 to 40 of about 230,090 (197)

The Role of Coordination Mechanisms and Transaction Costs Promoting Sustainability Performance in Agri‐Food Supply Chains: Evidence From Ecuador

open access: yesAgribusiness, EarlyView.
ABSTRACT Social tensions and resource depletion pose significant challenges to the agri‐food sector, highlighting the need for coordinated strategies to ensure sustainability in supply chains. Despite its critical importance, the relationship between coordination mechanisms and sustainability performance remains underexplored.
Carlos Moreno‐Miranda, Liesbeth Dries
wiley   +1 more source

Medición de la cintura de un haz de luz

open access: yesRevista de Investigación de Física, 2010
Hemos medido los perfiles de la distribución de irradiancia y la propagación espacial de un diodo emisor de luz y de un láser HeNe usando diversas técnicas experimentales.
Franklin Julca   +2 more
doaj   +1 more source

Confusiones de interpretación en Mecánica Cuántica elemental [PDF]

open access: yes, 2017
Quantum Mechanics is a fundamental physical theory about atomic-scale processes. It was built between 1920 and 1940 by the most distinguished physicists of that time.
Lopez Armengol, Federico Gaston   +1 more
core  

Drivers of insect herbivory resistance and tolerance to plant damage in the Brachypodium distachyon species complex

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Insect herbivory is a major biotic factor shaping plant populations and driving the evolution of defensive traits. Polyploidy (whole‐genome duplication) often induces substantial phenotypic and genotypic changes that may affect species interactions, including herbivory.
Antonio J. Manzaneda   +4 more
wiley   +1 more source

An analytical review of statistical methods and designs in agricultural science Una revisión analítica de diseños y métodos estadísticos en ciencias agrícolas

open access: yesAgronomía Colombiana, 1994
Scientilic papers of six wellknown international journal of agricultural research (Agronomy Journal, Crop Science, Plant Physiology, Phytopathology, Plant Disease, Journal of Economic Entomology) and the Revista ICA of Colombia, were revised taking the ...
Martínez W. Orlando, Galindo Ricardo
doaj  

Determinación experimental de la carga de apertura de grieta en fatiga bajo cargas aleatorias [PDF]

open access: yes, 2019
El concepto de carga de apertura o cierre de grieta es ampliamente utilizado en fatiga para justificar el comportamiento del crecimiento de grietas con distintas relaciones de carga y el efecto de interacción de las cargas.
Camas, Daniel   +4 more
core  

Ansiedad matemática, género y ramas de conocimiento en alumnos universitarios [PDF]

open access: yes, 2011
Las respuestas afectivas juegan un papel esencial en el proceso de enseñanza-aprendizaje de las matemáticas. La «ansiedad matemática» ha centrado gran número de investigaciones.
Castro Martínez, Encarnación   +3 more
core   +4 more sources

Synergetic Combination of Carbon Xerogels, Graphene Oxide and nano‐ZnO for Aqueous and Organic Supercapacitors

open access: yesBatteries &Supercaps, Volume 8, Issue 3, March 2025.
This work proposes the synthesis of carbon‐based nanostructured materials obtained using ZnO as both nanos‐ template and catalysts simultaneously. During the synthesis, GO was used as a stabiliser, preventing the collapse of the 3D structure and improving its properties in terms of capacitance and surface area.
Rusbel Coneo‐Rodríguez   +5 more
wiley   +1 more source

Teaching styles of teachers from different higher education careers associated with Natural Science

open access: yesEducación, 2015
Teaching styles manifest the preferences in kind of teaching of professors, which involve certain teaching conceptions (Heimlich & Norland, 2002). Identification of teaching styles is the starting point to reflect on teaching practices and consistency ...
Julieta Laudadío, Claudia Mazzitelli
doaj  

Laboratorio de física fundamental para la licenciatura en matemáticas y física [PDF]

open access: yes, 2017
En la enseñanza de las ciencias, como la física; se ha realizado de manera teórico práctica por su naturaleza experimental. En este sentido, el laboratorio tiene como objetivo principal ilustrar los contenidos de las clases teóricas, de modo que el ...
Cardona Camelo, Katherine   +1 more
core  

Home - About - Disclaimer - Privacy