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By Brian X. Chen, August 28, 2008
Just as small, fast-moving mammals replaced lumbering
dinosaurs, pocketable gadgets are evolving to fill niches that
larger, deskbound computers can't reach. But as they shrink,
these gadgets are faced with problems mammals face, too,
such as efficiently dissipating heat.
The recent example of Apple's first-generation iPod nanos
causing fires in Japan raises the question of whether
increasingly innovative product designs are impinging on
safety. The nano incident illustrates how risk can increase as
devices decrease in size, says Roger Kay, an analyst at
EndpointTechnologies.
"As [gadgets] get smaller, the tradeoffs become more difficult,
the balance becomes more critical and there's less room for
error," Kay said. "I'm not surprised it's happening to the nano
because that's the small one. You're asking it to do a lot in a
very, very small package and that's pushing the envelope.”
There's no question that industrial designers' jobs have
become much more difficult as the industry demands ever
more powerful and smaller gadgets. With paper-thin
subnotebooks, ultrasmall MP3 players, and pinkie finger-
sized Bluetooth headsets becoming increasingly popular, it's
questionable where exactly designers draw the line between
innovation and safety.
According to the text industrial designers' jobs have become more difficult because they…
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By Brian X. Chen, August 28, 2008
Just as small, fast-moving mammals replaced lumbering
dinosaurs, pocketable gadgets are evolving to fill niches that
larger, deskbound computers can't reach. But as they shrink,
these gadgets are faced with problems mammals face, too,
such as efficiently dissipating heat.
The recent example of Apple's first-generation iPod nanos
causing fires in Japan raises the question of whether
increasingly innovative product designs are impinging on
safety. The nano incident illustrates how risk can increase as
devices decrease in size, says Roger Kay, an analyst at
EndpointTechnologies.
"As [gadgets] get smaller, the tradeoffs become more difficult,
the balance becomes more critical and there's less room for
error," Kay said. "I'm not surprised it's happening to the nano
because that's the small one. You're asking it to do a lot in a
very, very small package and that's pushing the envelope.”
There's no question that industrial designers' jobs have
become much more difficult as the industry demands ever
more powerful and smaller gadgets. With paper-thin
subnotebooks, ultrasmall MP3 players, and pinkie finger-
sized Bluetooth headsets becoming increasingly popular, it's
questionable where exactly designers draw the line between
innovation and safety.
Provas
Dois dados não viciados são lançados. Considere X1 = face do dado 1, X2 = face do dado 2 e os eventos:
A \( X_1,X_2\,|\,X_1\,\,X_2\,\,10 \)
B \( X_1,X_2\,|\,X_1\,\,X_2 \)
Calcule P(B/A).
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Em uma regressão logística múltipla, se uma variável explicativa \( x_i \) é dicotômica, seu coeficiente \( ^∧\,\,_i \) pode ter uma interpretação especial: a razão de chance (odds ratio) estimada da resposta para dois níveis possíveis de \( x_i \) . Pode se definir a razão de chance como:
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Sobre amatriz energética brasileira pode-se afirmar que:
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I. A combinação das teclas CTRL + SETA para a direita permite ir para o fim da linha atual do texto.
II. Através do Menu “Inserir” coloca-se o cabeçalho no texto.
III. A combinação CTRL + F tem a finalidade de fechar o documento atual.
Dos itens acima mencionados:
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“Em 1959, durante uma palestra no Instituto de Tecnologia da Califórnia, o físico Richard Feynman sugeriu que, em um futuro não muito distante, os engenheiros poderiam pegar átomos e colocá-los onde bem entendessem, desde que, é claro, não fossem violadas as leis da natureza. Com isso, materiais com propriedades inteiramente novas, poderiam ser criados. Esta palestra, intitulada "Há muito espaço lá embaixo" é, hoje, tomada como o ponto inicial da nanotecnologia.”
Disponível em: http://www.mct.gov.br/html/template/frameSet.php?urlFrame=http://www.comciencia.br/reportagens/nanotecnologia/nano10.htm&objMct=No%20Brasil
Sobre a nanotecnologia NÃO é correto afirmar que:
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