Foram encontradas 50 questões.
Devido ao baixo custo, dispositivos eletromagnéticos de rastreamento têm sido comumente utilizados em ergonomia. Os objetos de metal no ambiente podem introduzir erros de medição, causados pelo desenvolvimento de correntes parasitas em metais próximos, os quais produzem campos magnéticos secundários e interferem com o campo emitido a partir do transmissor. A alteração da frequência da taxa de amostragem pode ter impacto na precisão dos dispositivos de localização eletromagnéticos. Em teoria, a amostragem com uma maior frequência permite que, em menos tempo, um estado estacionário seja alcançado, resultando em maiores erros. Com base nestas questões, LaScalza, Arico e Hughes (2003) avaliaram, com metais presentes no ambiente, o efeito da taxa de amostragem para a precisão de um sistema comercial que utiliza sensores eletromagnéticos, conhecido como Flock of Birds (Ascension Technology, Burlington, VT), cujos resultados mostraram que o Flock of Birds pode ser afetado pela taxa de amostragem. O dispositivo foi mais preciso em um ambiente com predominância de alumínio do que o de aço, e em taxas de amostragem mais baixas. Em relação ao estudo de LaScalza e colaboradores, é possível admitir que o uso do Flock of Birds é mais indicado para avaliar posturas, realizadas no próprio ambiente de trabalho, dos
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O guia NIOSH (National Institute for Occupational Safety and Health), 1981, define quatro atributos de trabalho como a base para recomendação do limite de levantamento de carga, que são:
I. localização do centro de massa do objeto (ou do centro geométrico do local de pega), medida horizontalmente de um ponto médio no piso entre os dois tornozelos;
II. localização do centro de massa do objeto (ou do centro geométrico do local de pega), medido no início (origem) do levantamento em relação ao piso;
III. frequência média do levantamento (em número de levantamentos por minuto) no período de uma ou oito horas.
Em 1994, foram incorporadas questões relativas à qualidade da pega entre a mão e a carga e de assimetrias entre o centro de massa da carga e o ponto médio no plano sagital do corpo. O quarto atributo de trabalho originalmente concebido era referente à(ao)
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Considere uma situação de aperfeiçoamento do método da imersão em que o indivíduo é colocado, em posição ortostática, em uma gaiola de metal de peso conhecido. Sabe-se que entre a gaiola, fixada em um sistema que permite sua movimentação vertical, e o sistema de movimentação há uma célula de carga que mede força. Quando a gaiola está parada no ar, com o indivíduo dentro, a célula de carga mede a força-peso do indivíduo somada ao peso da gaiola. Utilizando-se o sistema de movimentação vertical, a gaiola e o indivíduo podem ser movimentados para baixo, sendo inseridos dentro de um tanque cilíndrico com 1,0 m de diâmetro e 2,5 m de altura, inicialmente com água até os 2,0 m de altura. Na lateral da gaiola, há uma fita métrica fixada, de modo que é possível controlar a imersão no tanque com sensibilidade de 1,0 cm. Se ambos os membros inferiores e a gaiola são imersos gradativamente no tanque, com a respectiva medida da quantidade de imersão pela fita métrica e a correspondente medida da força dada pela célula da carga, é correto afirmar que
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O método REBA (Rapid Entire Body Assessment), desenvolvido por Hignett and McAtamney (2000), estima o risco de desordens corporais a que os trabalhadores estão expostos; é uma ferramenta que avalia a quantidade de posturas forçadas nas tarefas, onde são manipuladas pessoas ou qualquer tipo de carga animada, apresentando uma grande similaridade com o método RULA (Rapid Upper Limb Assessment). Este método inclui, além dos fatores de carga postural dinâmicos e estáticos na interação pessoa-carga, um conceito denominado “a gravidade assistida” para a manutenção da postura dos membros superiores, ou seja, obtém-se a ajuda da gravidade para manter a postura do braço, sendo mais custoso manter o braço levantado do que tê-lo pendurado. O método REBA foi aplicado, inicialmente, em análises de posturas forçadas adotadas pela(s)
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Para estimar a massa de um membro inferior (pé, perna e coxa) de um indivíduo saudável, admitindo a aceleração da gravidade igual a 9,81 m.s–2, utilizando-se a medida da variação da altura do nível de água, ao inserir o indivíduo em um tanque cilíndrico de raio e nível inicial de água conhecido, é imprescindível conhecer
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Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
The utterance by Neal Cheatwood “We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans” in the indirect speech is
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
The word highlighted in “The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere,…” can be substituted, with no change of meaning, for
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
If the word “American” and the word “successful” were inserted in the phrase “the heat shield”, the right sequence of words would be
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
The “ch” in the word technology as in “… the technology have led to...” has the same sound of the word in, EXCEPT,
Provas
Nasa successfully tests hypersonic heat shield
July 25, 2012.
The development of a large inflatable heat shield by the Space Technology Program at NASA has a number of implications for the oft-criticized space agency, as successful tests of the technology have led to speculation about its potential to support long-distance travel.
Science Daily reported that the Inflatable Reentry Vehicle Experiment (IRVE-3) was launched from NASA's Wallops Flight Facility on Wallops Island, Virginia. The heat shield reached speeds up to 7,600 miles per hour, successfully, and travelled at this rate for a significant period during the test.
The purpose of the test was to show that a space capsule can rely upon the heat shield to protect itself as it enters an atmosphere, according to the news outlet. Planetary entry and descent, including both a return to Earth from the International Space Station and any prospective missions to Mars, were targeted as potential uses for the outer shell.
“It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator”, James Reuther, deputy director of NASA's Space Technology Program, said in a statement. “This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space.”
NASA's engineering research team used a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials for IRVE-3, as the heat shield was launched for its suborbital flight from a three-stage Black Brant Rocket, according to Science Daily.
The heat shield was inflated by a system that pumped nitrogen into the aero shell until it expanded to a shape with a diameter of 10 feet. Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras and onboard instruments, as the temperature and pressure levels of the craft were closely observed to ensure the success of the test.
From takeoff to splashdown, the flight lasted roughly 20 minutes, but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.
“A team of NASA engineers and technicians spent the last three years preparing for the IRVE-3 flight,” said Lesa Roe, director of NASA's Langley Research Center in Hampton, Va. “We are pushing the boundaries with this flight. We look forward to future test launches of even bigger inflatable aero shells.”
Space.com reported that NASA engineers want this test to serve as a springboard for later efforts, including the use of these heat shields for larger payloads, such as ships that contain large amounts of materials or even human passengers.
“We want to go to higher latitudes at that mass, or use this technology for larger payloads, such as humans”, Neal Cheatwood, the principal engineer for the test, told the news outlet
Cheatwood noted that the engineering research team is trying to outline the myriad potential uses for the heat shield, but the first application is likely to be a support role for the removal of garbage for the International Space Station.
Robotic spacecraft are sent to remove trash from the ISS, but can only carry a small amount of supplies on these trips. However, the successful IRVE-3 test showed that there is a potential for the heat shield to increase the productivity of these trips.
“When we send up re-supply [spacecraft] to the station, there's no portable on-demand storage up there,” Cheatwood told Space.com. “When they bring up 'x' number of cubic feet of stuff, we need to get rid of that much as well.”
(http://why.knovel.com/all-engineering-news/1746-nasa-successfully-tests-hypersonic-heat-shield.html – Com adaptações.)
Match the two columns to classify the “ing forms” and mark the alternative which presents the right sequence.
1. “ing form” used as a verb.
2. “ing form” used as a noun.
3. “ing form” used as an adjective.
( ) “This demonstration flight goes a long way toward showing the value...”
( ) “Engineers at the Wallops site monitored IRVE-3 by watching four onboard cameras…”
( ) “… but the implications of the test could have a far-reaching impact on NASA's ability to support space travel.”
( ) “We are pushing the boundaries with this flight.”
( ) “… the engineering research team is trying to outline the myriad potential uses for the heat shield,…”
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