Questões de Concursos Inglês

     The Port of Santos is located in the city of Santos, Brazil. As of 2006, it is the busiest container port in Latin America. It is Brazil’s leading port in container traffic. Today it is Latin America’s largest port. Its structure is considered Brazil’s most modern.
     It was once considered the ‘port of death’ in the 19th century. Ships tended to avoid docking at the wood plank port, fearing the yellow fever. The floods in the city’s area provoked illnesses and once the bubonic plague almost decimated the population.
     In the early 20th century, major urbanization created the port’s modern structure seen today, eliminating the risk of diseases and providing the port with modern, industrial-age infrastructure.
     The first railway link from the port to the state capital São Paulo City, 79 km away, and the state’s interior, was completed in 1864. This allowed for an easier transportation of the vast masses of migrant workers who headed to São Paulo and the state’s numerous coffee farms.
     Millions of immigrants reached Brazil via the port of Santos in the late 19th and early 20th centuries, proceeding to the country’s interior by railway. Santos was for a few decades the true gateway to Brazil for millions of immigrants.

(Adapted from http://en.wikipedia.org/wiki/Port_of_Santos – acesso em 21.01.2011)

President Obama Launches Gun-Violence Task Force

Five days after deadliest elementary school shooting in U.S. history, President Obama said his administration plans immediate action early next year on proposals to curb an “epidemic of gun violence”. At a morning news conference, Obama announced the formation of a task force to be headed by Vice President Joe Biden that will formulate a package of policy recommendations by January. “The fact that this problem is complex can no longer be an excuse for doing nothing”, Obama said. “The fact that we can’t prevent every act of violence doesn’t mean that we can’t steadily reduce the violence and prevent the very worst violence.” The president said he intends to push for implementation of the proposals “without delay”. “This is a team that has a very specific task to pull together real reforms right now”, he said.

While Obama did not offer specifics, he suggested the task force would examine an array of steps to curb gun violence and prevent mass shootings, including legislative measures, mental health resources and a “look more closely at a culture that all-too-often glorifies guns and violence”. “I will use all the powers of this office to help advance efforts aimed at preventing more tragedies like this”, Obama said.

Obama made similar pronouncements following at least four other mass shootings that marked his first term. But few policy changes were made. “This is not the first incident of horrific gun violence of your four years. Where have you been?”, asked ABC News’ Jake Tapper. “I’ve been president of the United States, dealing with the worst economic crisis since the Great Depression, an auto industry on the verge of , two wars. I don’t think I’ve been on vacation”, Obama responded.

Read the text below to answer the questions 11-15.

NASA Researchers Studying Advanced Nuclear Rocket Technologies

January 9, 2013

By using an innovative test facility at NASA’s Marshall Space Flight Center in Huntsville, Ala., researchers are able to use non-nuclear materials to simulate nuclear thermal rocket fuels - ones capable of propelling bold new exploration missions to the Red Planet and beyond. The Nuclear Cryogenic Propulsion Stage team is tackling a three-year project to demonstrate the viability of nuclear propulsion system technologies. A nuclear rocket engine uses a nuclear reactor to heat hydrogen to very high temperatures, which expands through a nozzle to generate thrust. Nuclear rocket engines generate higher thrust and are more than twice as efficient as conventional chemical rocket engines.

The team recently used Marshall’s Nuclear Thermal Rocket Element Environmental Simulator, or NTREES, to perform realistic, non-nuclear testing of various materials for nuclear thermal rocket fuel elements. In an actual reactor, the fuel elements would contain uranium, but no radioactive materials are used during the NTREES tests. Among the fuel options are a graphite composite and a “cermet” composite - a blend of ceramics and metals. Both materials were investigated in previous NASA and U.S. Department of Energy research efforts.

Nuclear-powered rocket concepts are not new; the United States conducted studies and significant ground testing from 1955 to 1973 to determine the viability of nuclear propulsion systems, but ceased testing when plans for a crewed Mars mission were deferred.

The NTREES facility is designed to test fuel elements and materials in hot flowing hydrogen, reaching pressures up to 1,000 pounds per square inch and temperatures of nearly 5,000 degrees Fahrenheit - conditions that simulate space-based nuclear propulsion systems to provide baseline data critical to the research team.

“This is vital testing, helping us reduce risks and costs associated with advanced propulsion technologies and ensuring excellent performance and results as we progress toward further system development and testing,” said Mike Houts, project manager for nuclear systems at Marshall.

A first-generation nuclear cryogenic propulsion system could propel human explorers to Mars more efficiently than conventional spacecraft, reducing crews’ exposure to harmful space radiation and other effects of long-term space missions. It could also transport heavy cargo and science payloads. Further development and use of a first-generation nuclear system could also provide the foundation for developing extremely advanced propulsion technologies and systems in the future - ones that could take human crews even farther into the solar system.

Building on previous, successful research and using the NTREES facility, NASA can safely and thoroughly test simulated nuclear fuel elements of various sizes, providing important test data to support the design of a future Nuclear Cryogenic Propulsion Stage. A nuclear cryogenic upper stage - its liquid- hydrogen propellant chilled to super-cold temperatures for launch - would be designed to be safe during all mission phases and would not be started until the spacecraft had reached a safe orbit and was ready to begin its journey to a distant destination. Prior to startup in a safe orbit, the nuclear system would be cold, with no fission products generated from nuclear operations, and with radiation below significant levels.

“The information we gain using this test facility will permit engineers to design rugged, efficient fuel elements and nuclear propulsion systems,” said NASA researcher Bill Emrich, who manages the NTREES facility at Marshall. “It’s our hope that it will enable us to develop a reliable, cost-effective nuclear rocket engine in the not-too-distant future."

The Nuclear Cryogenic Propulsion Stage project is part of the Advanced Exploration Systems program, which is managed by NASA’s Human Exploration and Operations Mission Directorate and includes participation by the U.S. Department of Energy. The program, which focuses on crew safety and mission operations in deep space, seeks to pioneer new approaches for rapidly developing prototype systems, demonstrating key capabilities and validating operational concepts for future vehicle development and human missions beyond Earth orbit.

Marshall researchers are partnering on the project with NASA’s Glenn Research Center in Cleveland, Ohio; NASA’s Johnson Space Center in Houston; Idaho National Laboratory in Idaho Falls; Los Alamos National Laboratory in Los Alamos, N.M.; and Oak Ridge National Laboratory in Oak Ridge, Tenn.

The Marshall Center leads development of the Space Launch System for NASA. The Science & Technology Office at Marshall strives to apply advanced concepts and capabilities to the research, development and management of a broad spectrum of NASA programs, projects and activities that fall at the very intersection of science and exploration, where every discovery and achievement furthers scientific knowledge and understanding, and supports the agency’s ambitious mission to expand humanity’s reach across the solar system. The NTREES test facility is just one of numerous cutting-edge space propulsion and science research facilities housed in the state-of- the-art Propulsion Research & Development Laboratory at Marshall, contributing to development of the Space Launch System and a variety of other NASA programs and missions.

Available in: http://www.nasa.gov

(UNIOESTE PR/2015)

Seven portions of fruit and vegetables are better for you

For many years, the nutrition message has been “five a day” – the recommendation that five portions of fruit and vegetables are enough to keep disease at bay and help us to live longer. That advice has been revised upwards. A new study suggests that people who get seven or more portions a day are healthier. Researchers from University College London studied the dietary habits of 65,000 adults over a seven-year period. They concluded that: “A robust inverse association exists between fruit and vegetable consumption and mortality, with benefits seen in up to 7-plus portions daily.” In other words, if you eat more fruit and vegetables, chances are you live longer.

The researchers put people into five different groups, depending on how much fruit and veg they ate. They found that those who ate seven or more portions a day had a 42 percent lower risk of death than those who ate just one portion. They recommended that schools serve healthier meals and that supermarkets put more emphasis on prominently displaying cheaper produce. They warned that frozen and canned fruit was linked to higher mortality rates. Some experts say the findings of the study should be taken with a pinch of salt. One dietician said the findings ignored the fact that people who eat more fruit and veg are generally wealthier and thus lead lifestyles that will help them live longer anyway.

Adapted from: http://www.breakingnewsenglish.com/1404/140403-fruit-and-vegetables.html