Presents recent archaeological findings about the first people to settle the Americas, how they got here, and from what continent they came, which includes analyses by linguists, geneticists, climatologists, and other scientists. Teacher's Guide available.
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Anbieter: World of Books (was SecondSale), Montgomery, IL, USA
Hardback. Zustand: Good. A an lise de um conjunto de dipolos log-peri dicos (LPDA) utilizando o HFSS envolve uma avalia o abrangente do seu desempenho eletromagn tico numa vasta gama de frequ ncias. A an lise come a com a simula o do modelo LPDA, onde o HFSS calcula os par metros S para determinar a imped ncia de entrada e os coeficientes de reflex o, garantindo a correspond ncia adequada da imped ncia nas frequ ncias de funcionamento. O software tamb m gera os padr es de radia o em diferentes frequ ncias, fornecendo informa es sobre a directividade, o ganho e a largura do feixe da antena. Ao examinar estes padr es, poss vel avaliar o desempenho da LPDA em termos das suas propriedades direccionais e cobertura. Al m disso, o HFSS permite a visualiza o da distribui o de corrente nos elementos do dipolo, destacando reas de radia o m xima e potenciais pontos de acesso. Atrav s destas an lises, poss vel identificar e resolver potenciais problemas, tais como resson ncias ou incompatibilidades. Os resultados do HFSS permitem uma compreens o detalhada do comportamento do LPDA, facilitando melhorias iterativas no projeto para melhorar o desempenho, a largura de banda e a efici ncia. Esta an lise abrangente garante que o LPDA cumpre as especifica es pretendidas. Artikel-Nr. 00097934336
Anzahl: 1 verfügbar
Anbieter: Better World Books, Mishawaka, IN, USA
Zustand: Good. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Artikel-Nr. 3485346-6
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Anbieter: Better World Books, Mishawaka, IN, USA
Zustand: Very Good. Former library copy. Pages intact with possible writing/highlighting. Binding strong with minor wear. Dust jackets/supplements may not be included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Artikel-Nr. 5724680-75
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Anbieter: ThriftBooks-Atlanta, AUSTELL, GA, USA
Hardcover. Zustand: Good. No Jacket. Former library book; Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. Artikel-Nr. G0792282280I3N10
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Anbieter: WorldofBooks, Goring-By-Sea, WS, Vereinigtes Königreich
Paperback. Zustand: Very Good. The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged. Artikel-Nr. GOR004422517
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