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Abusos y condiciones de servidumbre relacionados con la implementación de los programas de trabajadores huéspedes (el caso tamaulipeco)

Frontera Norte, 2010
Las visas H-2A para trabajadores agrarios temporales son muy controvertidas. Así, los grupos defensores de los jornaleros han argumentado que éstas no protegen a la mano de obra estadounidense y propician el abuso y la explotación de los trabajadores ...
Simón Pedro Izcara Palacios
doaj

Integer Programming, low complexity Heuristics, and Gaussian instances for the Internet Shopping Optimization Problem with multiple item Units (ISHOP-U) [PDF]

Journal of Universal Computer Science
The Internet Shopping Optimization Problem with multiple item Units (ISHOP-U) is a recently proven NP-Hard variant of the classical ISHOP, which considers buying more than one unit of the same product.
Fernando Ornelas +7 more
doaj +3 more sources

Sustainability and the Reallocation of Production Across Grazing Regimes in Livestock Systems: Evidence From Mexico

Journal of Agricultural Economics, Volume 77, Issue 2, Page 267-282, June 2026.
ABSTRACT Changes towards more sustainable livestock production are often evaluated in terms of whether farms abandon environmentally harmful practices. Less attention has been paid to how farms reallocate production across alternative grazing systems and how the composition of production evolves over time.
Saúl Basurto‐Hernández, Allan Beltrán, Luis Peña‐Lévano +2 more
wiley +1 more source

Los janambres de Tamaulipas

Revista Chicomoztoc, 2021
Esta investigación espera hacer aportes para la caracterización del modo de subsistencia de los janambres con el objetivo de analizarlo y entenderlo. Primero, se trata de una investigación que permita aproximarse a una definición del modo de subsistencia recolector cazador de los indígenas janambres y las actividades concomitantes.
openaire +1 more source

Abasto del agua en la frontera norte de Tamaulipas

Frontera Norte, 2016
El trabajo ref lexiona sobre el abasto de agua potable en los municipios fronterizos del norte de Tamaulipas, a partir de la perspectiva del derecho humano al agua ( DHA ).
Jesús FRAUSTO ORTEGA
doaj

Geographic risks to functional groups of mammals and birds from habitat loss in Mexico

Conservation Biology, Volume 40, Issue 3, June 2026.
Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source

Mammals from Tamaulipas, Mexico.

, 1909
(Uploaded by Plazi for the Bat Literature Project) No abstract provided.
openaire +2 more sources

The recent mammals of Tamaulipas, Mexico

University of Kansas publications, Museum of Natural History., 1963
(Uploaded by Plazi for the Bat Literature Project) No abstract provided.
openaire +2 more sources

Latencia, horas de sueño y presión arterial en pacientes hospitalizados en México

Revista Cuidarte
Highlights • Los pacientes hospitalizados presentaron un promedio de 1:29 horas de sueño menos que el promedio de la población mexicana. • Un mayor número de horas de sueño se asoció con una menor presión arterial diastólica.
María Elena Pérez-Vega +5 more
doaj +1 more source

Efficient synthesis of sulfonamide derivatives on solid supports catalyzed using solvent-free and microwave-assisted methods

Química Nova, 2011
In this work we report the synthesis of sulfonamide derivatives using a conventional procedure and with solid supports, such as silica gel, florisil, alumina, 4Å molecular sieves, montmorillonite KSF, and montmorillonite K10 using solvent-free and ...
Argelia Camargo-Ordoñez +5 more
doaj +1 more source

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