Results 91 to 100 of about 562,501 (315)

Algunos crinoides (Echinodermata-Crinoidea) del Pérmico de la región de Pemuxco, Hidalgo

open access: yes, 2017
Se describen cinco especies de crinoides Cylindrocaulis cusfiski Moore y Jeffords, 1968, Baryschir anosus Moore y Jeffords, 1968, Cyclocaudex jucundus Moore y Jeffords, 1968, Cyclocaudex plenus Moore y Jeffords, 1968, Cycloscapus laevis Moore y Jeffords,
B. E. B. Sánchez   +3 more
semanticscholar   +1 more source

Atlas de la Educación Pública en Hidalgo

open access: yesAtlas de la educación Pública en Hidalgo, 2019
El sistema educativo formal está presente en Hidalgo desde la creación del estado en 1869; y son múltiples los esfuerzos de enseñanza que desde entonces se han realizado.
Secretaría de Educación Pública de Hidalgo
semanticscholar   +1 more source

Technological Properties of Biocomposites Produced With Agro‐Industrial Castor Waste Applicable in the Thermal Insulation of Buildings

open access: yesPolymer Composites, EarlyView.
Biocomposites produced with agro‐industrial waste from castor hulls and pinewood bonded with urea‐formaldehyde adhesive, intended for application as thermal insulation in buildings. ABSTRACT The production of composite particleboards with agricultural waste has been the focus of many studies that aim to address environmental problems due to waste ...
Thamirys Andrade Lopes   +7 more
wiley   +1 more source

Derechos Humanos y Trabajo Infantil En El Estado De Hidalgo

open access: yesXihmai, 2012
RESUMEN El objetivo de este artí­culo1 es analizar la situación de los derechos humanos y el trabajo infantil de los Jornaleros Agrí­colas Migrantes (JAM) en el Valle del Mezquital, Hidalgo. ABSTRACT The objective of this article is to analyze the
Azul Valdivieso Martí­nez
doaj   +1 more source

Acto en recuerdo de Carlos García Fernández [PDF]

open access: yes, 1995
Leído por D.
Ybarra Hidalgo, Eduardo
core  

Digitising biological collections to advance National Species Inventories: A case study from the flora of Chile

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
In response to Chile's public policy to establish a national biodiversity inventory and monitoring system, we launched the HerbarioDigital.cl portal. We have digitised over 120,000 specimens representing more than 3,900 species from two Chilean herbaria, integrating them through a curated local taxonomic index.
Ricardo A. Segovia   +5 more
wiley   +1 more source

Paso del Norte, qué lejos te vas quedando. Implicaciones de la migración de retorno en México

open access: yesEstudios Demográficos y Urbanos, 2013
A partir de la crisis financiera mundial del año 2008 los movimientos migratorios internacionales han disminuido, particularmente el de los mexicanos que van a Estados Unidos. Los datos de diversas fuentes de información revelan que debido a este proceso
José Aurelio Granados Alcántar   +1 more
doaj  

Dressed coordinates: the path-integrals approach

open access: yes, 2007
The recent introduced \textit{dressed coordinates} are studied in the path-integral approach. These coordinates are defined in the context of a harmonic oscillator linearly coupled to massless scalar field and, it is shown that in this model the dressed ...
Andion   +17 more
core   +2 more sources

Potential distribution and susceptibility of Coffea arabica L. to climate change impacts

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Ecological niche models (ENMs) are vital for understanding the impact of historical factors on ecosystems and predicting future climate change scenarios. These models help assess how environmental shifts affect agricultural species like coffee, which supports millions of people globally.
Yuliana Grisel García‐Martínez   +1 more
wiley   +1 more source

Examination of Afghanistan's Development Traps

open access: yesRegional Science Policy &Practice, EarlyView., 2022
Abstract We examine the factors behind Afghanistan's persistent underdevelopment. Drawing on various theories of development traps operating at the demographic, economic and institutional levels, we seek to assess whether and to what extent their functioning affects Afghanistan's development. To capture the functioning of development traps empirically,
Klemen Knez, Tina G. Lokar
wiley   +1 more source

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