790 resultados para Árabe
Resumo:
Esta dissertação tem por finalidade analisar o fenômeno religioso da conversão ao Islã. Com base em um estudo empírico a dissertação estuda a conversão ao Islã como sendo um processo de assimilação do ethos religioso islâmico empreendido por brasileiros de ascendência não árabe. Numa proposta sociológica o conceito de conversão foi ampliado e articulado junto aos conceitos de identidade e assimilação. Os convertidos entrevistados fazem parte de uma sociedade religiosa muçulmana sunita situada em São Bernardo do Campo na região do grande ABC, São Paulo, organizada em torno de um Centro de Divulgação do Islã para a América Latina (CDIAL), e de uma mesquita que leva o nome de Abu Bakr Assedic. Esta dissertação tenta compreender os antecedentes sócio-religiosos, os motivos da conversão e suas conseqüências. Para tanto, sustentamos ainda que o processo de conversão ao Islã é gradativo e empreendido por um sujeito ativo, que ao interpretar suas próprias experiências, constrói uma identidade particular e diferenciadora do ethos árabe.(AU)
Resumo:
Few-mode fiber transmission systems are typically impaired by mode-dependent loss (MDL). In an MDL-impaired link, maximum-likelihood (ML) detection yields a significant advantage in system performance compared to linear equalizers, such as zero-forcing and minimum-mean square error equalizers. However, the computational effort of the ML detection increases exponentially with the number of modes and the cardinality of the constellation. We present two methods that allow for near-ML performance without being afflicted with the enormous computational complexity of ML detection: improved reduced-search ML detection and sphere decoding. Both algorithms are tested regarding their performance and computational complexity in simulations of three and six spatial modes with QPSK and 16QAM constellations.
Water vapour isotopes analyser raw data from POLARSTERN cruise PS95.2 (ANT-XXXI/1.2), links to files
Water vapour isotopes analyser raw data from POLARSTERN cruise PS93.1 (ARK-XXIX/2.1), links to files
Resumo:
Methylmercury (MeHg) is a neurotoxic compound that threatens wildlife and human health across the Arctic region. Though much is known about the source and dynamics of its inorganic mercury (Hg) precursor, the exact origin of the high MeHg concentrations in Arctic biota remains uncertain. Arctic coastal sediments, coastal marine waters and surface snow are known sites for MeHg production. Observations on marine Hg dynamics, however, have been restricted to the Canadian Archipelago and the Beaufort Sea (<79°N). Here we present the first central Arctic Ocean (79-90°N) profiles for total mercury (tHg) and MeHg. We find elevated tHg and MeHg concentrations in the marginal sea ice zone (81-85°N). Similar to other open ocean basins, Arctic MeHg concentration maxima also occur in the pycnocline waters, but at much shallower depths (150-200 m). The shallow MeHg maxima just below the productive surface layer possibly result in enhanced biological uptake at the base of the Arctic marine food web and may explain the elevated MeHg concentrations in Arctic biota. We suggest that Arctic warming, through thinning sea ice, extension of the seasonal sea ice zone, intensified surface ocean stratification and shifts in plankton ecodynamics, will likely lead to higher marine MeHg production.
Water vapour isotopes analyser raw data from POLARSTERN cruise PS95.1 (ANT-XXXI/1.1), links to files