Proposta De Uma Família De Conversores Zcs Quase-ressonante

In this study, the annual movements of a seabird species, the red-throated diver (Gavia stellata), were investigated in space and time. Between 2015 and 2017, 33 individuals were fitted with satellite transmitters at the German Bight (eastern North Sea). In addition, stable isotope analyses of feathers (δ13C) were used to identify staging areas during the previous moult. The German Bight is an important area for this species, but is also strongly affected by anthropogenic impacts. To understand how this might affect populations, we aimed to determine the degree of connectivity and site fidelity, and the extent to which seasonal migrations vary among different breeding locations in the high Arctic. Tagged individuals migrated to Greenland (n = 2), Svalbard (n = 2), Norway (n = 4) and northern Russia (n = 25). Although individuals from a shared breeding region (northern Russia) largely moved along the same route, individuals dispersed to different, separate areas during the non-breeding phase. Kernel density estimates also overlapped only partially, indicating low connectivity. The timing of breeding was correlated with the breeding longitude, with 40 days later arrival at the easternmost than westernmost breeding sites. Repeatability analyses between years revealed a generally high individual site fidelity with respect to spring staging, breeding and moulting sites. In summary, low connectivity and the distribution to different sites suggests some resilience to population decline among subpopulations. However, it should be noted that the majority of individuals breeding in northern Russia migrated along a similar route and that disturbance in areas visited along this route could have a greater impact on this population. In turn, individual site fidelity could indicate low adaptability to environmental changes and could lead to potential carry-over effects. Annual migration data indicate that conservation planning must consider all sites used by such mobile species.

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Annual movements of a migratory seabird—the NW European red-throated diver (Gavia stellata)—reveals high individual repeatability but low migratory connectivity

Kleinschmidt

Bürger

Bustamante

et al. 2022

Mar Biol

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DAISI — ein digitales Luftbild-System zur Erfassung von Seevögeln und Meeressäugetieren

Coppack¹,

Weidauer²

2014

Wasser Abfall

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Conversor Cc-cc Elevador/Abaixador Zvzcs Pwm com Grampeamento Ativo

Klein¹,

Santos²,

Paiva³

et al. 2012

Eletrônica de Potência

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Resumo-Este artigo apresenta o conversor CC-CC bidirecional em corrente (Elevador/abaixador) com comutação suave ZVZCS (zero voltage zero current switching) e grampeamento ativo, utilizando um único interruptor auxiliar. As perdas em comutação são reduzidas através da implementação de um circuito snubber ativo, o qual provê comutação sob tensão nula (ZVS) na entrada em condução de todos os interruptores e também no bloqueio do interruptor auxiliar. O bloqueio do interruptor principal ocorre com comutação sob corrente nula (ZCS). Dentre as suas principais características estão robustez, baixo peso e volume e alta eficiência. O principio de operação em regime permanente, análise matemática, simulação numérica e resultados experimentais de um protótipo de laboratório são apresentados.

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Proposta De Uma Família De Conversores Zcs Quase-ressonante

Cited by 4 publications

References 19 publications

Annual movements of a migratory seabird—the NW European red-throated diver (Gavia stellata)—reveals high individual repeatability but low migratory connectivity

Annual movements of a migratory seabird—the NW European red-throated diver (Gavia stellata)—reveals high individual repeatability but low migratory connectivity

DAISI — ein digitales Luftbild-System zur Erfassung von Seevögeln und Meeressäugetieren

Conversor Cc-cc Elevador/Abaixador Zvzcs Pwm com Grampeamento Ativo

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