Questões de Concurso

    A Amazônia, dona de uma bacia hidrográfica com cerca de 60% do potencial hidrelétrico do país, tem a chance de emergir como uma região próspera, capaz de conciliar desenvolvimento, conservação e diversidade sociocultural. O progresso está diretamente ligado ao papel que a região exercerá em duas áreas estratégicas para o planeta: clima e energia. Não se trata de explorar a floresta e deixar para trás terra arrasada, mas de aproveitar o valor de seus ativos sem qualquer agressão ao meio ambiente. Para isso, basta que o Brasil seja capaz de colocar em prática uma ampla e bem-sucedida política socioambiental, a exemplo do que faz a indústria cosmética nacional, que seduziu o mundo com a biodiversidade brasileira. É marketing e é conservacionismo também.
    Segundo o pesquisador Beto Veríssimo, fundador do Instituto do Homem e Meio Ambiente da Amazônia (Imazon), a floresta é fundamental para a redução global das emissões de gases de efeito estufa. "O Brasil depende da região para produzir mais energia e não sou contra a expansão da rede de usinas aqui, mas é preciso cautela, para não repetir erros do passado, quando as hidrelétricas catalisaram ocupação desordenada, conflitos sociais e desmatamentos. Enfrentar o desmatamento da Amazônia é crucial para o Brasil."

(Trecho de Diálogos capitais. CartaCapital, 7 de setembro de 2011, p. 46)

    A Amazônia, dona de uma bacia hidrográfica com cerca de 60% do potencial hidrelétrico do país, tem a chance de emergir como uma região próspera, capaz de conciliar desenvolvimento, conservação e diversidade sociocultural. O progresso está diretamente ligado ao papel que a região exercerá em duas áreas estratégicas para o planeta: clima e energia. Não se trata de explorar a floresta e deixar para trás terra arrasada, mas de aproveitar o valor de seus ativos sem qualquer agressão ao meio ambiente. Para isso, basta que o Brasil seja capaz de colocar em prática uma ampla e bem-sucedida política socioambiental, a exemplo do que faz a indústria cosmética nacional, que seduziu o mundo com a biodiversidade brasileira. É marketing e é conservacionismo também.
    Segundo o pesquisador Beto Veríssimo, fundador do Instituto do Homem e Meio Ambiente da Amazônia (Imazon), a floresta é fundamental para a redução global das emissões de gases de efeito estufa. "O Brasil depende da região para produzir mais energia e não sou contra a expansão da rede de usinas aqui, mas é preciso cautela, para não repetir erros do passado, quando as hidrelétricas catalisaram ocupação desordenada, conflitos sociais e desmatamentos. Enfrentar o desmatamento da Amazônia é crucial para o Brasil."

(Trecho de Diálogos capitais. CartaCapital, 7 de setembro de 2011, p. 46)

Internet Architects Warn of Risks in Ultrafast Networks

    If nothing else, Arista Networks proves that two people can make more than $1 billion each building the Internet and still be worried about its reliability.
    David Cheriton, a computer science professor at Stanford known for his skills in software design, and Andreas Bechtolsheim, one of the founders of Sun Microsystems, have committed $100 million of their money, and spent half that, to shake up the business of connecting computers in the Internet’s big computing centers.
    As the Arista founders say, the promise of having access to vast amounts of data instantly, anywhere, is matched by the threat of catastrophe. People are creating more data and moving it ever faster on computer networks. The fast networks allow people to pour much more of civilization online, including not just Facebook posts and every book ever written, but all music, live video calls, and most of the information technology behind modern business, into a worldwide “cloud” of data centers. The networks are designed so as to be always available, via phone, tablet, personal computer or an increasing array of connected devices.
    Statistics dictate that the vastly greater number of transactions among computers in a world 100 times faster than today will lead to a greater number of unpredictable accidents, with less time in between them.
    Mr. Bechtolsheim says that because of the Internet’s complexity, the global network is impossible to design without bugs. Very dangerous bugs, as he describes them, capable of halting commerce, destroying financial information or enabling hostile attacks by foreign powers.
    More transactions also mean more system attacks. Even though he says there is no turning back on the online society, Mr. Cheriton worries most about security hazards. “I ...... the claim that the Chinese military can take it down in 30 seconds, no one can prove me wrong,” he said.
    The common connection among computer servers, one gigabit per second, is giving way to 10-gigabit connections, because of improvements in semiconductor design and software. Speeds of 40 gigabits, even 100 gigabits, are now used for specialty purposes like consolidating huge data streams among hundreds of thousands of computers across the globe, and that technology is headed into the mainstream. An engineering standard for a terabit per second, 1,000 gigabits, is expected in about seven years.

(Adapted from. http://www.nytimes.com/2011/11/14/technology/)

Internet Architects Warn of Risks in Ultrafast Networks

    If nothing else, Arista Networks proves that two people can make more than $1 billion each building the Internet and still be worried about its reliability.
    David Cheriton, a computer science professor at Stanford known for his skills in software design, and Andreas Bechtolsheim, one of the founders of Sun Microsystems, have committed $100 million of their money, and spent half that, to shake up the business of connecting computers in the Internet’s big computing centers.
    As the Arista founders say, the promise of having access to vast amounts of data instantly, anywhere, is matched by the threat of catastrophe. People are creating more data and moving it ever faster on computer networks. The fast networks allow people to pour much more of civilization online, including not just Facebook posts and every book ever written, but all music, live video calls, and most of the information technology behind modern business, into a worldwide “cloud” of data centers. The networks are designed so as to be always available, via phone, tablet, personal computer or an increasing array of connected devices.
    Statistics dictate that the vastly greater number of transactions among computers in a world 100 times faster than today will lead to a greater number of unpredictable accidents, with less time in between them.
    Mr. Bechtolsheim says that because of the Internet’s complexity, the global network is impossible to design without bugs. Very dangerous bugs, as he describes them, capable of halting commerce, destroying financial information or enabling hostile attacks by foreign powers.
    More transactions also mean more system attacks. Even though he says there is no turning back on the online society, Mr. Cheriton worries most about security hazards. “I ...... the claim that the Chinese military can take it down in 30 seconds, no one can prove me wrong,” he said.
    The common connection among computer servers, one gigabit per second, is giving way to 10-gigabit connections, because of improvements in semiconductor design and software. Speeds of 40 gigabits, even 100 gigabits, are now used for specialty purposes like consolidating huge data streams among hundreds of thousands of computers across the globe, and that technology is headed into the mainstream. An engineering standard for a terabit per second, 1,000 gigabits, is expected in about seven years.

(Adapted from. http://www.nytimes.com/2011/11/14/technology/)

Internet Architects Warn of Risks in Ultrafast Networks

    If nothing else, Arista Networks proves that two people can make more than $1 billion each building the Internet and still be worried about its reliability.
    David Cheriton, a computer science professor at Stanford known for his skills in software design, and Andreas Bechtolsheim, one of the founders of Sun Microsystems, have committed $100 million of their money, and spent half that, to shake up the business of connecting computers in the Internet’s big computing centers.
    As the Arista founders say, the promise of having access to vast amounts of data instantly, anywhere, is matched by the threat of catastrophe. People are creating more data and moving it ever faster on computer networks. The fast networks allow people to pour much more of civilization online, including not just Facebook posts and every book ever written, but all music, live video calls, and most of the information technology behind modern business, into a worldwide “cloud” of data centers. The networks are designed so as to be always available, via phone, tablet, personal computer or an increasing array of connected devices.
    Statistics dictate that the vastly greater number of transactions among computers in a world 100 times faster than today will lead to a greater number of unpredictable accidents, with less time in between them.
    Mr. Bechtolsheim says that because of the Internet’s complexity, the global network is impossible to design without bugs. Very dangerous bugs, as he describes them, capable of halting commerce, destroying financial information or enabling hostile attacks by foreign powers.
    More transactions also mean more system attacks. Even though he says there is no turning back on the online society, Mr. Cheriton worries most about security hazards. “I ...... the claim that the Chinese military can take it down in 30 seconds, no one can prove me wrong,” he said.
    The common connection among computer servers, one gigabit per second, is giving way to 10-gigabit connections, because of improvements in semiconductor design and software. Speeds of 40 gigabits, even 100 gigabits, are now used for specialty purposes like consolidating huge data streams among hundreds of thousands of computers across the globe, and that technology is headed into the mainstream. An engineering standard for a terabit per second, 1,000 gigabits, is expected in about seven years.

(Adapted from. http://www.nytimes.com/2011/11/14/technology/)