Results 21 to 30 of about 237,560 (166)

Metodología para la determinación de la permeabilidad de un yacimiento gasifero aplicando simulación numérica y regresión no lineal [PDF]

open access: yes, 1988
La ecuación diferencial parcial, no lineal, de segundo orden que describe el flujo radial de un gas real a través de un medio poroso es resuelta utilizando diferencias finitas1.
Darderes, Enrique   +2 more
core   +3 more sources

Evaluating composted sewage sludge as a phosphorus fertilizer in wheat grown on soils with different properties

open access: yesJournal of Environmental Quality, Volume 55, Issue 1, January/February 2026.
Abstract Urbanization generates significant amounts of sewage sludge (SS), with relatively high concentrations of plant nutrients such as phosphorus (P). When biochemically stabilized by composting, SS (composted sewage sludge [CSW]) can serve as a sustainable P source in agriculture, supporting a circular economy and reducing agriculture's dependence ...
Lucía Guerrero‐Gallardo   +7 more
wiley   +1 more source

Escribir en comunidad: Construcción de relaciones y responsabilidad en la producción de conocimiento

open access: yesAmerican Anthropologist, Volume 127, Issue 3, Page 447-465, September 2025.
ABSTRACT As anthropology reckons with its past, present, and future, anthropologists increasingly seek to challenge inequities within the discipline and academia more broadly. Anthropology, regardless of subdiscipline, is a social endeavor. Yet research often remains an isolating (though not necessarily solitary) process, even within research teams and
Jordi Armani Rivera Prince   +16 more
wiley   +1 more source

Estabilidad de tensión por el método del análisis modal en el sistema eléctrico de Pereira [PDF]

open access: yes, 2011
En este trabajo se aplica la herramienta del análisis modal al sistema eléctrico de la ciudad de Pereira para conocer si éste es estable en tensión ante diferentes contingencias.
Bedoya Villamil, John Fredy   +1 more
core  

Vitamin D deficiency induces erectile dysfunction: Role of superoxide and Slpi

open access: yesBritish Journal of Pharmacology, Volume 182, Issue 15, Page 3669-3687, August 2025.
Background and Purpose Epidemiological studies suggest a relationship between vitamin D deficiency and erectile dysfunction (ED). We hypothesized that vitamin D deficiency or vitamin D receptor (VDR) knockout causes ED and analysed the underlying molecular mechanisms.
Miguel A. Olivencia   +14 more
wiley   +1 more source

Flujos de capital privado y calificaciones soberanas a mercados emergentes [PDF]

open access: yes, 2001
La desaceleración coyuntural de la economía mundial iniciada en la segunda mitad del año 2000 –impulsada por los aumentos de las tasas de interés internacionales y de los precios del petróleo- se profundizó en el transcurso del presente año, debido, a la
González González, Enrique
core  

Landowners Meet Drug Traffickers: Coercive Networks and Violence in Rural Colombia

open access: yesAntipode, Volume 57, Issue 4, Page 1402-1425, July 2025.
Abstract The transport of drugs and the flow of drug proceeds have a major impact on the social and economic configuration of the rural areas affected by them. Though this is widely acknowledged, the impact of illicit economies on agrarian social conflicts remains unclear. Using the case of the marijuana trade in the agrarian societies of the Magdalena
Luis David Castillo Rojas   +1 more
wiley   +1 more source

Separación ternaria de una mezcla azeotrópica isopropanol-agua [PDF]

open access: yes, 2016
Este proyecto de grado está compuesto por nueve capítulos -- El primero corresponde a la teoría, marco teórico y algunos antecedentes relacionados con el trabajo, adicionalmente, se presentan los objetivos y la justificación del por qué se realizó el ...
Palacio González, Erika Juliana   +1 more
core  

Towards a global understanding of tree mortality

open access: yesNew Phytologist, Volume 245, Issue 6, Page 2377-2392, March 2025.
Summary Rates of tree mortality are increasing globally, with implications for forests and climate. Yet, how and why these trends vary globally remain unknown. Developing a comprehensive assessment of global tree mortality will require systematically integrating data from ground‐based long‐term forest monitoring with large‐scale remote sensing.
International Tree Mortality Network   +114 more
wiley   +1 more source

sabinaNSDM: An R package for spatially nested hierarchical species distribution modelling

open access: yesMethods in Ecology and Evolution, Volume 15, Issue 10, Page 1796-1803, October 2024.
Abstract Species distribution models have evolved to combine species‐environment interactions across multiple scales. Spatially nested hierarchical models (NSDMs) offer a promising avenue by integrating datasets and predictive models from broad to fine scales. But a user‐friendly tool to execute these models remains an important ongoing challenge.
Rubén G. Mateo   +5 more
wiley   +1 more source

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