Results 121 to 130 of about 1,092 (242)

Abandonar la casa en tiempos difíciles: huida y expulsiones en el Magreb medieval

open access: yesMiscelánea de Estudios Árabes y Hebraicos. Sección Árabe-Islam
La guerra y los conflictos armados han sido, y siguen siendo, una de las causas principales para la movilidad de las poblaciones. Expulsiones, deportaciones, exilios, destrucción de ciudades y hábitat han provocado a lo largo de la historia dinámicas de migración y el Mágreb medieval no es una excepción.
openaire   +3 more sources

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

open access: yesDeep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao   +7 more
wiley   +1 more source

Smart Functional Hydrogels: Emerging Platforms for Thermal and Electrochemical Energy Harvesting and Conversion Systems

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The hydrogel exhibits versatile functions, including efficient thermogalvanic conversion under a temperature difference, and acting as a cooling layer/forming a thermally conductive nanoactive composite for thermovoltaic conversion. Additionally, its self‐healing and self‐powered flexibility play a key role in energy storage systems. The growing demand 
Eunah Kang
wiley   +1 more source

Extranjeros indeseables en México (1911-1940). Una aproximación cuantitativa a la aplicación del artículo 33 constitucional

open access: yesHistoria Mexicana El Colegio de México, 2004
Este trabajo  es un acercamiento a las complejas relaciones entre nacionales y extranjeros a lo largo de los años transcurridos entre la llegada de Francisco I. Madero a la presidencia de México y el final del gobierno de Lázaro Cárdenas.
Pablo Yankelevich
doaj  

POLÍTICA MIGRATORIA Y DELITOS: EXPULSIÓN POR CAUSAS PENALES Y DERECHOS BAJO LA ACTUAL LEY ARGENTINA DE MIGRACIONES

open access: yesREMHU: Revista Interdisciplinar da Mobilidade Humana
Resumen En este trabajo presento algunos hallazgos de la investigación doctoral sobre la implementación de la política migratoria argentina a través del poder judicial: los casos de expulsiones por delitos, utilizando como fuente principal los ...
Lila García
doaj   +1 more source

Nucleophilic Reactions of Cyclobutenones and the Related 4,4‐Dichlorocyclobutenone Derivatives

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Cyclobutenone derivates and their 4,4‐dichloro counterparts have an uninterrupted attention as useful synthons in the synthesis of complex organic molecules. Their nucleophilic reactions remain underexplored. This review brings attention to these reactions, whose outcome is not straightforward.
Sarah J. Wright   +2 more
wiley   +1 more source

Migraciones/expulsiones ambientales en Argentina: Un diagnóstico inicial y propuesta de abordaje

open access: yes, 2023
El análisis de las movilidades de los pueblos son fenómenos que llevan años de estudio a nivel mundial y sus motivos, generalmente, han sido explicados por cuestiones culturales, económicas, sociales, políticas, religiosas, bélicas, entre otras. Ahora bien, aquellas movilidades provocadas por conflictos territoriales, ambientales y climáticos se tornan
openaire   +1 more source

Tandem Synthesis and Photophysical Behavior of Pyrazolo[3,4‐h][1,6]naphthyridines: A Theoretical–Experimental Approach

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A tandem reaction of 5‐aroylpyrazolo[3,4‐b]pyridines with malononitrile and methanol to access pyrazolo[3,4‐h][1,6]naphthyridines was achieved in 60%–66% yield under microwave conditions. The tricyclic fluorophoric core bears groups of different stereoelectronic nature (i.e., alkyl, aryl, MeO, and CN), and thus their optoelectronic activity shows ...
Carlos Cifuentes   +3 more
wiley   +1 more source

[Trajectory of lumbar and sacral pedicular screws: Comparison between midline versus wiltse approach]. [PDF]

open access: yesSurg Neurol Int, 2017
Gagliardi M   +6 more
europepmc   +1 more source

Age, embryo donor status, and insemination with chilled semen all predispose to persistent breeding‐induced endometritis in warmblood mares

open access: yesEquine Veterinary Journal, EarlyView.
Abstract Background Persistent breeding‐induced endometritis (PBIE) is a common reason for mares failing to establish pregnancy. Objective To examine the hypothesis that advancing mare age and embryo donor status predispose to PBIE and compromise fertility.
Tom Stout   +3 more
wiley   +1 more source

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