Questões de Concursos Inglês

The uses for oil

Oil is the largest source of liquid fuel and, in spite of attempts to develop synthetic fuels, world consumption of oil products in increasing.
The oil industry is not much more than a hundred years old. It began when the first oil well was drilled in 1859. In the early days, oil was used to light houses because there was no electricity and gas was very scarce. Later, people began to use oil for heating too.
Most industries use machinery to make things. Every machine needs oil in order to run easily. Even a small clock or watch needs a little oil from time to time.
The engines of many machines use oil fuels petrol, kerosene or diesel. Cars, buses, trucks, tractors, and small aircraft use petroleum chemicals: synthetic rubber, plastics, synthetic fiber materials for clothes and for the home, paints, materials which help to stop rust, photographic materials, soap and cleaning materials (detergents), drugs, fertilizers for farms and gardens, food containers, and may others.
In 1900 the world’s oil production was less than 2 million tons a year. Today the oil industry is one of the world’s largest and most important suppliers of raw materials.

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Self-repairing software tackles malware

     University of Utah computer scientists have developed software that not only detects and eradicates never-before-seen viruses and other malware, but also automatically repairs damage caused by them. The software then prevents the invader from ever infecting the computer
again.
     A3 is a software suite that works with a virtual machine - a virtual computer that emulates the operations of a computer without dedicated hardware. The A3 software is designed to watch over the virtual machines operating system and applications, says Eric Eide, University of Utah research assistant professor of computer science leading the university s A3 team with U computer science associate professor John Regehr. A3 is designed to protect servers or similar business-grade computers that run on the Linux operating system. It also has been demonstrated to protect military applications.
     The new software called A3, or Advanced Adaptive Applications, was co-developed by Massachusetts-based defense contractor, Raytheon BBN. The four-year project was completed in late September.
     There are no plans to adapt A3 for home computers or laptops, but Eide says this could be possible in the future.
     "A3 technologies could find their way into consumer products someday, which would help consumer devices protect themselves against fast-spreading malware or internal corruption of software components. But we havent tried those experiments yet," he says.
     Unlike a normal virus scanner on consumer PCs that compares a catalog of known viruses to something that has infected the computer, A3 can detect new, unknown viruses or malware automatically by sensing that something is occurring in the computer s operation that is not correct. It then can stop the virus, approximate a repair for the damaged software code, and then learn to never let that bug enter the machine gain.
     While the military has an interest in A3 to enhance cybersecurity for its mission-critical systems, A3 also potentially could be used in the consumer space, such as in web services like Amazon. If a virus or attack stops the service, A3 could repair it in minutes without having to take the servers down.

Source: http://www.sciencedaily.com

TEXT 1
                                    When was the first computer unvented?

            The word "computer" was first recorded as being used in 1613 and was originally used to describe a human who performed calculations or computations. The definition of a computer remained the same until the end of the 19th century when people began to realize machines never get tired and can perform calculations much faster and more accurately than any team of human computers ever could.
            In 1822, Charles Babbage began developing the Difference Engine, which was considered to be the first automatic computing engine. It was capable of computing several sets of numbers and making hard copies of the results. Unfortunately, because of funding he was never able to complete a full-scale functional version of this machine. In June of 1991, the London Science Museum completed the Difference Engine Nº 2 for the bicentenni- al year of Babbage"s birth and later completed the printing mechanism in 2000.

Fonte: http://www.computerhope.com/issues/ch000984.htm Acesso em: 15/10/2013

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The Right to a “Custody Hearing” under International Law

by Maria Laura Canineu
February 3, 2014

        A person who is arrested has a right to be brought promptly before a judge. This is a longstanding and fundamental principle of international law, crucial for ensuring that the person’s arrest, treatment, and any ongoing detention are lawful.
        Yet, until now, Brazil has not respected this right. Detainees often go months before seeing a judge. For instance, in São Paulo state, which houses 37 percent of Brazil’s total prison population, most detainees are not brought before a judge for at least three months. The risk of ill-treatment is often highest during the initial stages of detention, when police are questioning a suspect. The delay makes detainees more vulnerable to torture and other serious forms of mistreatment by abusive police officers.
        In 2012, the UN Subcommittee on Prevention of Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment reported that it had received “repeated and consistent accounts of torture and ill-treatment” in São Paulo and other Brazilian states, “committed by, in particular, the military and civil police.” The torture had allegedly occurred in police custody or at the moment of arrest, on the street, inside private homes, or in hidden outdoor areas, and was described as “gratuitous violence, as a form of punishment, to extract confessions, and as a means of extortion.”
        In addition to violating the rights of detainees, these abusive practices make it more difficult for the police to establish the kind of public trust that is often crucial for effective crime control. These practices undermine legitimate efforts to promote public security and curb violent crime, and thus have a negative impact on Brazilian society as a whole.
        The right to be brought before a judge without unnecessary delay is enshrined in treaties long ago ratified by Brazil, including the International Covenant on Civil and Political Rights (ICCPR) and the American Convention on Human Rights. The United Nations Human Rights Committee, which is responsible for interpreting the ICCPR, has determined that the delay between the arrest of an accused and the time before he is brought before a judicial authority “should not exceed a few days,” even during states of emergency.
        Other countries in Latin America have incorporated this right into their domestic law. For instance, in Argentina, the federal Criminal Procedure Code requires that in cases of arrest without a judicial order, the detainee must be brought to a competent judicial authority within six hours.
        In contrast, Brazil’s criminal procedure code requires that when an adult is arrested in flagrante and held in police custody, only the police files of the case need to be presented to the judge within 24 hours, not the actual detainee. Judges evaluate the legality of the arrest and make the decision about whether to order continued detention or other precautionary measures based solely on the written documents provided by the police.
        The code establishes a maximum of 60 days for the first judicial hearing with the detainee, but does not explicitly say when this period begins. In practice, this often means that police in Brazil can keep people detained, with formal judicial authorization, for several months, without giving the detainee a chance to actually see a judge.
        According to the code, the only circumstance in which police need to bring a person before the judge immediately applies to cases of crimes not subject to bail in which arresting officer was not able to exhibit the arrest order to the person arrested at the time of arrest. Otherwise, the detainee may also not see a judge for several months.

(www.hrw.org. Editado e adaptado)

The US Department of Energy is giving $120m (£75m) to set up a new research centre charged with developing new methods of rare earth production.

Rare earths are 17 chemically similar elements crucial to making many hi-tech products, such as phones and PCs. The Critical Materials Institute will be located in Ames, Iowa.

The US wants to reduce its dependency on China, which produces more than 95% of the world’s rare earth elements, and address local shortages. According to the US Geological Survey, there may be deposits of rare earths in 14 US states. Besides being used for hi-tech gadgets, the elements are also crucial for manufacturing low-carbon resources such as wind turbines, solar panels and electric cars, said David Danielson, the US assistant secretary for renewable energy.

Rare earth elements are also used for military applications, such as advanced optics technologies, radar and radiation detection equipment, and advanced communications systems, according to a 2011 research report by the US Government Accountability Office. From the 1960s until the 1980s, the Mountain Pass mine in California made the US the world leader in rare earth production, but it was later closed, largely due to competition with the elements imported from China.

At the moment, the regulations surrounding rare earths mining in the US are very strict, an expert on the materials from Chalmers University of Technology in Sweden told the BBC. “The Mountain Pass mine was [also] closed down for environmental reasons,” said Prof Ekberg.