Results 61 to 70 of about 3,731 (222)

Quaternary Climate‐Driven Diversification of Alpine Grasshoppers in the Central Apennines: Insights Into Mediterranean Sky Islands as Centers of Microendemism

open access: yesJournal of Biogeography, Volume 53, Issue 5, May 2026.
ABSTRACT Aim Pleistocene climatic oscillations profoundly shaped Mediterranean mountain biotas through recurrent cycles of isolation and connectivity. Yet, despite the Central Apennines being a major centre of local endemism, this region has received limited attention in genomic studies addressing biogeographic processes.
Francesco Forte   +6 more
wiley   +1 more source

Análisis de la Política Exterior y de Seguridad Común (PESC) de la Unión Europea (EU). 1992 - 2006. [PDF]

open access: yes, 2014
Caso de Estudio. Análisis de la formulación de la Política Exterior y de Seguridad Común (PESC) de la Unión Europea desde 1992 a 2006. Enfoque realizado a partir de la teoría de las 'Nuevas Guerras' de M.
Burgos González, Jaime Alberto   +1 more
core   +1 more source

Simulation Based Studies in Software Engineering: A Matter of Validity [PDF]

open access: yesCLEI Electronic Journal, 2015
Despite the possible lack of validity when compared with other science areas, Simulation-Based Studies (SBS) in Software Engineering (SE) have supported the achievement of some results in the field.
Breno Bernard Nicolau de França   +1 more
doaj  

Política europea de Seguridad y Defensa: una aproximación militar

open access: yesArbor: Ciencia, Pensamiento y Cultura, 2008
El cambio de siglo ha confirmado la existencia de nuevos peligros: terrorismo transnacional, armas de destrucción masiva y la debilidad de algunos estados en práctica descomposición.
Félix Sanz Roldán
doaj   +1 more source

Extreme Rhythm Keeping in Long‐Range Slow Click Communication of Sperm Whales

open access: yesAnnals of the New York Academy of Sciences, Volume 1559, Issue 1, May 2026.
In this study, we show that male sperm whales produce low‐frequency slow clicks at low repetition rates with extreme source levels > 200 dB re 1 µPa (pp), making them the loudest mammalian communication signal, with an estimated active space of ∼70 km.
Simone K. A. Videsen   +10 more
wiley   +1 more source

Hitchhikers on an Invader: The Parasitic Leech Myzobdella lugubris and the Epibiotic Barnacle Amphibalanus improvisus on the Atlantic Blue Crab Callinectes sapidus in Southwestern Europe

open access: yesEcology and Evolution, Volume 16, Issue 4, April 2026.
This study documents the first worldwide record of the parasitic leech Myzobdella lugubris and the commensal barnacle Amphibalanus improvisus associated with invasive Atlantic blue crabs (Callinectes sapidus) in southwestern Europe. Molecular analyses confirmed the identity of these Western Atlantic native species, highlighting a complex multi‐level co‐
Gustavo F. de Carvalho‐Souza   +2 more
wiley   +1 more source

Concepção e análise de retificadores híbridos trifásicos unidirecionais [PDF]

open access: yes, 2008
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.Neste trabalho aborda-se o estudo de retificadores híbridos trifásicos unidirecionais para aplicações em potências elevadas. O
Alves, Ricardo Luiz
core  

Tema 10: La Política Exterior y de Seguridad Común (PESC) [PDF]

open access: yes, 2023
Este documento pdf reproduce los contenidos del PowerPoint del Tema 10 de la asignatura "Instituciones jurídicas de la Unión Europea" para el curso académico 2022-2023.1.- Aspectos generales de la Política Exterior y de Seguridad Común (PESC).
Bou Franch, Valentín
core  

原发性食管小细胞癌研究进展

open access: yesZhongguo shiyan zhenduanxue, 2015
目前,食管癌是一种常见的恶性肿瘤,组织学分型可分为鳞癌、腺癌等,其中以鳞癌最为常见,约占90%以上,而原发性的食管小细胞癌(PESC)则更为罕见。近年来,随着病理学技术的发展,以及食管癌外科手术切除技术的提高,文献报道的PESC发病率有所上升。由于国内的食管癌整体发病率高于国外,因此,近年来国内所报道的病例要明显多于国外。PESC的镜下、影像学以及临床表现与鳞癌、腺癌相类似,但其生物学特性、组织来源 ...
杨成, 韩振国, 李婷
doaj  

Exploring ecohydrology through the lens of local fishers in the Bolivian Amazon

open access: yesEcosphere, Volume 17, Issue 4, April 2026.
Abstract The natural flow regimes of Andean‐Amazon tributaries play a vital role in sustaining their rich biodiversity and productive local fisheries, but ongoing and proposed alteration of river flow regimes by large dams threatens to negatively impact river ecosystems. Despite its importance, our understanding of how hydrologic variability influences
Lina G. Terrazas‐Villarroel   +4 more
wiley   +1 more source

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