Results 41 to 50 of about 28,100 (196)

Comparison of drone and ground surveys for the detection of a rare plant in a fragile ecosystem

Ecological Solutions and Evidence, Volume 7, Issue 1, January–March 2026.
We compared the accuracy, time, and financial costs of drone and ground surveys for the detection of wood lilies (Lilium philadelphicum) in an endangered alvar ecosystem. We found that the drone surveys detected 73%–78% of the plants found in the ground surveys, but that this type of survey was more expensive and time consuming than the ground survey ...
Ana Hernández Martínez de la Riva, Koreen Millard, Murray Richardson, Joseph Bennett   +3 more
wiley   +1 more source

Landscape heterogeneity influences on sheep habits under extensive grazing management in Southern Patagonia [PDF]

, 2015
In Southern Patagonia, continuous grazing with fixed stocking rates in large paddocks prevails over grazing systems subjected to regular evaluations and rotational rests.
Peri, Pablo Luis
core  

Una evaluación simplificada del kernel reducido para solucionar el problema de radiación de una antena cilíndrica

Revista Facultad de Ingeniería Universidad de Antioquia, 2010
Este artículo presenta una solución simplificada de las expresiones relacionadas con la radiación de una antena cilíndrica de alambre recto utilizando el método de los momentos con el así llamado kernel reducido o aproximado.
Carlos Iván Páez Rueda
doaj  

Microcrédito y bienestar: una evaluación empírica

Sociedad y Economía, 2011
El artículo expone los resultados de una investigación académica dirigida a esti­mar el efecto de corto plazo de la otorgación de microcréditos sobre la población de beneficiarios de programas implementados en la ciudad de Bogotá.
Nubia Stella Carreño, Hugo Alfonso Hernández Escolar, Jhon Alexander Méndez Sayago   +2 more
doaj   +1 more source

Sustained contraceptive‐level plasma concentrations of 4,4′‐dinitrocarbanilide in free‐ranging urban feral pigeons fed a custom bait Niveles plasmáticos altos y sostenidos de 4,4′‐dinitrocarbanilida en palomas domésticas libres alimentadas con un cebo anticonceptivo

Wildlife Society Bulletin, Volume 49, Issue 4, December 2025.
We assessed the acceptability and consumption of a custom‐developed nicarbazin bait for feral pigeons, inferred its contraceptive efficacy, and evaluated the reversibility of its effects upon cessation of treatment. Only feral pigeons consumed the bait, except for one eared dove that also ingested the food. Continuous administration of this bait raised
Joaquín L. Navarro, Mariana Melchiorre, Constanza García Capocasa, Florencia Grasso, Alvina Lèche, Patricia Montoya, Luis Adrover, Pablo Ribotta   +7 more
wiley   +1 more source

Aprendizaje de un modelo de características de productos para el análisis de opiniones [PDF]

, 2012
En este artículo se introduce una nueva metodología para modelar características de productos a partir de una colección de opiniones de usuarios. La metodología propuesta se basa en modelos estadísticos de lenguajes y es aplicable a productos de dominio ...
Anaya Sánchez, Henry, Berlanga Llavori, Rafael, García Moya, Lisette   +2 more
core   +1 more source

Histograma orientado a gradientes con máquina de soporte vectorial, en la clasificación del alfabeto dactilológico

Revista Tecnológica, 2017
El objetivo del trabajo fue evaluar la eficiencia del clasificador Máquina de Soporte Vectorial (SVM) con el método de separación linear, cuando se utiliza el algoritmo de extracción de características Histograma Orientado a Gradientes (HOG) y cuando no ...
Jessica Johanna Morales Carrillo
doaj   +4 more sources

Talking as friends: Weaving local and scientific knowledge to co‐produce an integrated index to assess rangeland multifunctionality in a dryland Biosphere Reserve in Mexico

People and Nature, Volume 7, Issue 11, Page 3036-3056, November 2025.
Abstract The complexity of sustainability challenges and the need for transformative change have prompted the exploration of novel approaches for knowledge co‐generation and decision‐making. This calls for integrative assessment methods that meaningfully include and represent diverse knowledge systems, capturing multiple values, needs and interests as ...
Ricardo Ismael Mata‐Páez, Elisabeth Huber‐Sannwald, Natalia Martínez‐Tagüeña, Ruperto Cázares‐Reyes, Víctor Manuel Reyes‐Gómez, Juan José López‐Pardo, Sandra Hernández‐Valdez   +6 more
wiley   +1 more source

Análise da distribuição espacial de larvas de Aedes aegypti na Ilha do Governador, Rio de Janeiro, Brasil

Cadernos de Saúde Pública, 2000
Este trabalho visa contribuir para o conhecimento sobre Aedes aegypti no Rio de Janeiro com base na análise espacial de seus criadouros na Ilha do Governador, Rio de Janeiro, entre junho de 1992 e julho de 1994. Propõe a utilização de técnicas de análise
Souza-Santos Reinaldo, Carvalho Marilia Sá   +1 more
doaj  

Governing the Ungovernable: Mapping the Development of Groundwater Irrigation and Groundwater Policies in India

World Water Policy, Volume 11, Issue 4, Page 1048-1064, November 2025.
ABSTRACT Groundwater governance is complex due to several externalities associated with groundwater being an invisible natural resource tied to the land with millions of extractors and limited means of exclusion. The paper traces the evolution of groundwater irrigation in India and the corresponding change in groundwater laws and policies to address ...
Anindita Sarkar, Amrita Sarkar
wiley   +1 more source