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Islas de calor urbanas: un fenómeno poco estudiado en México

ULISES MANZANILLA QUIÑONES (2022, [Artículo])

El presente ensayo pretende dar a conocer la alternativa del uso de técnicas de percepción remota en la identificación de las islas de calor urbanas (ICU), fenómeno urbano mundial que ha sido poco estudiado en México. Mediante el procesamiento y análisis de imágenes satelitales es factible y confiable determinar áreas con una temperatura superficial mayor, es decir, calcular la diferencia en temperatura registrada entre un área urbana y un área rural. A través del uso de estas técnicas es posible diseñar planes para la mitigación y control de las ICU de las grandes ciudades de México.

AREAS URBANAS AUMENTO EN TEMPERATURA ESTRES TERMICO GEOGRAFIA URBANA METROPOLIS BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA VEGETAL (BOTÁNICA) ECOLOGÍA VEGETAL ECOLOGÍA VEGETAL

Local markets and food security. The case of the Milpera and Puuc regions in Yucatan

Ana Laura Bojórquez Carrillo Monserrat Vargas Jiménez Mireya Noemi Hernández Islas (2023, [Artículo, Artículo])

Food insecurity is a complex problem worldwide. A major part of this problem is the food supply. Local markets can represent a strategy for building social capital, as well as strategies for subsistence and sustainability of food value chains, contributing to food security and its effects. The objective of this research is to determine if the existence of a municipal market in the Milpera and Puuc regions of Yucatán favors the existence of food security, the consumption or the expense of natural foods. The population is located in 18 municipalities of Yucatán, Mexico. To carry out this study, a cross-sectional, non-experimental study, with a quantitative approach and correlational scope. The main techniques that were applied were descriptive statistics and contingency tables with respect to 6 hypotheses. This work shows that the existence of markets in the communities makes a significant difference because it positively impacts the food security of the inhabitants, since it allows them to have access to a wider variety of products and at the same time, favors the active dynamics of the economy of the community.

Local markets Food safety Local development Food sovereignty Rural areas Mercados locales Seguridad alimentaria Desarrollo local Soberanía alimentaria Zonas rurales CIENCIAS SOCIALES CIENCIAS SOCIALES

Stability of FeVO4-II under Pressure: A First-Principles Study

PRICILA BETBIRAI ROMERO VAZQUEZ SINHUE LOPEZ MORENO Daniel Errandonea (2022, [Artículo])

"In this work, we report first-principles calculations to study FeVO4 in the CrVO4-type (phase II) structure under pressure. Total-energy calculations were performed in order to analyze the structural parameters, the electronic, elastic, mechanical, and vibrational properties of FeVO4-II up to 9.6 GPa for the first time. We found a good agreement in the structural parameters with the experimental results available in the literature. The electronic structure analysis was complemented with results obtained from the Laplacian of the charge density at the bond critical points within the Quantum Theory of Atoms in Molecules methodology. Our findings from the elastic, mechanic, and vibrational properties were correlated to determine the elastic and dynamic stability of FeVO4-II under pressure. Calculations suggest that beyond the maximum pressure covered by our study, this phase could undergo a phase transition to a wolframite-type structure, such as in CrVO4 and InVO4."

FeVO4 under pressure CrVO4-type structure First-principles Mechanical properties Vibrational properties Electronic properties CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA FÍSICA FÍSICA DEL ESTADO SÓLIDO CRISTALOGRAFÍA CRISTALOGRAFÍA

Programa de ordenamiento ecológico y territorial, IMTA: 2da. Etapa

NORMA RAMIREZ SALINAS Luis Arturo Brizuela Mundo Rebeca González Villela Jorge Luis Izurieta Dávila MARICELA MARTINEZ JIMENEZ RODRIGO ULISES SANTOS TELLEZ (2018, [Documento de trabajo])

Con el objeto de ordenar la utilización del suelo y conservar los recursos naturales existentes, el IMTA certifica el predio que ocupa como una Área Destinada Voluntariamente a la Conservación (ADVC) ante la Comisión Nacional de Áreas Naturales Protegidas. Por lo que, el IMTA se obliga a contar y cumplir con un programa operativo anual que incluya la difusión de la existencia del ADVC en las zonas aledañas, con el fin de inducir una cultura de conservación de la flora y fauna existente.

Áreas protegidas Ordenamiento del territorio Ordenamiento ecológico BIOLOGÍA Y QUÍMICA

Local markets and food security. The case of the Milpera and Puuc regions in Yucatan

Ana Laura Bojórquez Carrillo Monserrat Vargas Jiménez Mireya Noemi Hernández Islas (2023, [Artículo, Artículo])

Food insecurity is a complex problem worldwide. A major part of this problem is the food supply. Local markets can represent a strategy for building social capital, as well as strategies for subsistence and sustainability of food value chains, contributing to food security and its effects. The objective of this research is to determine if the existence of a municipal market in the Milpera and Puuc regions of Yucatán favors the existence of food security, the consumption or the expense of natural foods. The population is located in 18 municipalities of Yucatán, Mexico. To carry out this study, a cross-sectional, non-experimental study, with a quantitative approach and correlational scope. The main techniques that were applied were descriptive statistics and contingency tables with respect to 6 hypotheses. This work shows that the existence of markets in the communities makes a significant difference because it positively impacts the food security of the inhabitants, since it allows them to have access to a wider variety of products and at the same time, favors the active dynamics of the economy of the community.

Local markets Food safety Local development Food sovereignty Rural areas Mercados locales Seguridad alimentaria Desarrollo local Soberanía alimentaria Zonas rurales CIENCIAS SOCIALES CIENCIAS SOCIALES