SóProvas


ID
463912
Banca
CESGRANRIO
Órgão
Transpetro
Ano
2011
Provas
Disciplina
Inglês
Assuntos

Model copes with chaos to deliver relief Computer program helps responders transport supplies in tough conditions
By Rachel Ehrenberg Science News, Web edition: Monday, February 21st, 2011
WASHINGTON — Getting blood or other perishable supplies to an area that’s been struck by an earthquake or hurricane isn’t as simple as asking what brown can do for you. But a new model quickly determines the best routes and means for delivering humanitarian aid, even in situations where bridges are out or airport tarmacs are clogged with planes.
The research, presented February 18 at the annual meeting of the American Association for the Advancement of Science, could help get supplies to areas which have experienced natural disasters or help prepare for efficient distribution of vaccines when the flu hits.
Efficient supply chains have long been a goal of manufacturers, but transport in fragile networks — where supply, demand and delivery routes may be in extremely rapid flux — requires a different approach, said Anna Nagurney of the University of Massachusetts Amherst, who presented the new work. Rather than considering the shortest path from one place to another to maximize profit, her system aims for the cleanest path at minimum cost, while capturing factors such as the perishability of the product and the uncertainty of supply routes. ‘You don’t know where demand is, so it’s tricky,’ said Nagurney. ‘It’s a multicriteria decision-making problem.’
By calculating the total cost associated with each link in a network, accounting for congestion and incorporating penalties for time and products that are lost, the computer model calculates the best supply chain in situations where standard routes may be disrupted.
‘Mathematical tools are essential to develop formal means to predict, and to respond to, such critical perturbations,’ said Iain Couzin of Princeton University, who uses similar computational tools to study collective animal behavior. ‘This is particularly important where response must be rapid and effective, such as during disaster scenarios … or during epidemics or breaches of national security.
’ The work can be applied to immediate, pressing situations, such as getting blood, food or medication to a disaster site, or to longer-term problems such as determining the best locations for manufacturing flu vaccines. . Retrieved April 7th, 2011.

In “The work can be applied to immediate, pressing situations," (lines 41-42), the fragment “can be applied" is replaced, without change in meaning, by

Alternativas
Comentários
  • Em "O trabalho pode ser aplicado em situações  urgente e imediatas," (linhas 41-42), o fragmento "can be applied" é substituído, sem mudança de sentido, por

    “Can" e “May"
    “Can" – Habilidade mental ou física de fazer algo ou perguntar sobre a possibilidade de fazer algo.
    Por exemplo:
    “Can you play the violin?"
    (Você sabe tocar o violino?)

    “May" – Autorização ou permissão para fazer algo.
    Por exemplo:
    “May I please use your stapler?"
    (Eu posso usar o seu grampeador, por favor?)

    May - também pode ser usado para expressar possibilidades. 
    No contexto acima podemos substituir "may"pelo "can"
    Alternativa A está correta.

    A) Pode ser aplicado.                                                                                                                             B) tem que ser aplicado.                                                                                                                         C) deve ser aplicado.                                                                                                                             D) vai certamente ser aplicado.                                                                                                             E) pode ocasionalmente ser aplicado.

  • a-

    Can & may sao equivalentes quando expressarem possibilidade. This can/may be done. Usos exclusivos do can: habilidade de executar algo. I can swim. Sei nadar. I can see the neighbour's garden from my porch. Usos exclusivos do may: permissao. You may open the window. May I close the door?