Results 31 to 40 of about 42,367 (168)
PhotonicsThis work investigates the changes in the optical response of photonic crystals based on porous silicon (PSi) as a function of temperature. Using the transfer matrix method in combination with thermo-optical properties, we numerically calculate the ...
Ivan Alonso Lujan-Cabrera +5 more
doaj +1 more source
Arbor: Ciencia, Pensamiento y Cultura, 2000 El Mando de Adiestramiento y Doctrina (MADOC), está imprimiendo un nuevo rumbo en la configuración del Ejército del siglo XXI. Los procesos de profesionalización y de modernización quedarían incompletos sin una mejora en la formación, doctrina, orgánica ...
Benito Vinuesa Guerrero
doaj +1 more source
Automorphic $L$\snug-functions, intertwining operators, and the irreducible tempered representations of $p$\snug-adic groups [PDF]
arXiv, 1994 We give an expository account of the theory of intertwining operators for connected reductive $p$--adic groups, and their connection with automorphic $L$--functions. Our purpose is to illustrate the relation between harmonic analysis and arithmetic.
arxiv
Ecology and Evolution, Volume 15, Issue 2, February 2025.Small historical museum collections can provide unexpected data points in telling the story of how climate change has impacted species. We report a (re)discovered Black‐capped Petrel (Pterodroma hasitata) from the 19th‐century Middlebury College Vertebrate Natural History collection and confirmed its late 1800s Vermont origin through a combination of ...
Oliver W. Patrick +5 more
wiley +1 more source
Revista Cubana de Ciencias Forestales, 2013 The forest fires are a global problem. In all cases, they occur and develop showing certain regularities, imposed mainly by weather, fuel and topography.
Marcos Pedro Ramos Rodríguez +2 more
doaj
Desigualdad, exclusión y oportunidades educativas en la región otomí del estado de Tlaxcala
Nova Scientia, 2014 La desigualdad en la educación básica en México es un problema latente; a pesar de las políticas educativas universalizantes emprendidas desde hace décadas, las oportunidades educativas no son las mismas para todos los niños y adolescentes.
Adriana Carro Olvera +4 more
doaj +1 more source
La aventura de la fisica [PDF]
Ciencia Ergo Sum (UAEM), v. 13, No. 3 (2006) 271-280, 2005 Con la intencion de realizar una pequena aportacion en la celebracion del ano 2005, proclamado como Ano Internacional de la Fisica, el cuerpo academico de Particulas, Campos y Astrofisica de la Universidad Autonoma de Zacatecas presenta un pequeno esbozo de los trabajos realizados por Einstein en 1905, asi como un conjunto de ensayos sobre ...
arxiv
Integrating adult occurrence and reproduction data to identify conservation measures for amphibians
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Monitoring programs are pivotal to establishing sound management. Due to economic, logistic, and time limitations, monitoring programs often overlook differences among life‐history stages. However, species occurrence does not necessarily mean population viability, and it is unclear to what extent monitoring programs that do not consider ...
Elia Lo Parrino +4 more
wiley +1 more source
Identificación y Registro Catastral de Cuerpos de Agua mediante Técnicas de Procesamiento Digital de Imagenes [PDF]
arXiv, 2013 The effects of global climate change on Peruvian glaciers have brought about several processes of deglaciation during the last few years. The immediate effect is the change of size of lakes and rivers. Public institutions that monitor water resources currently have only recent studies which make up less than 10% of the total.
arxiv
LandFrag: A Dataset to Investigate the Effects of Forest Loss and Fragmentation on Biodiversity
Global Ecology and Biogeography, Volume 34, Issue 2, February 2025.ABSTRACT Motivation The accelerated and widespread conversion of once continuous ecosystems into fragmented landscapes has driven ecological research to understand the response of biodiversity to local (fragment size) and landscape (forest cover and fragmentation) changes.
Thiago Gonçalves‐Souza +89 more
wiley +1 more source