Machine learning & AI
Computer scientists who helped build the foundations of today's artificial intelligence technology are warning of its dangers, but that doesn't mean they agree on what those dangers are or how to prevent them.
May 3, 2023
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Energy & Green Tech
Nuclear power is the single largest source of carbon-free energy in the United States and currently provides nearly 20 percent of the nation's electrical demand. Many analyses have investigated the potential of future nuclear ...
May 2, 2023
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Robotics
The social separation imposed by the pandemic led us to rely on technology to an extent we might never have imagined—from Teams and Zoom to online banking and vaccine status apps.
Apr 28, 2023
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Energy & Green Tech
New and advanced types of nuclear reactors could play an important role in helping the U.S. meet its long-term climate goals, but a range of technical, regulatory, economic, and societal challenges must first be overcome, ...
Apr 27, 2023
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Robotics
Imagine lying on a bed, you just have to move your fingers to guide a mobile robot to bring you a cup of water, open the door to fetch some deliveries, or even do some laundry. If you are interested, you may want to learn ...
Apr 20, 2023
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Engineering
A new report details how Argonne engineers have tested extended reality tools at the nation's largest liquid metal test facility.
Apr 18, 2023
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Energy & Green Tech
Hours after Germany closed out its atomic era by turning off its last three nuclear reactors, the largest single reactor in Europe entered regular production in Finland, its operator said Sunday.
Apr 16, 2023
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Energy & Green Tech
"Nuclear power, no thanks!" What was once a slogan found on the bumper of many a German car became a reality Saturday, as the country shut down its three remaining nuclear power plants in line with a long-planned transition ...
Apr 16, 2023
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Energy & Green Tech
Wealthy nations can lead by example in cutting carbon emissions, though much faster action is needed to stem global warming, U.S. Energy Secretary Jennifer Granholm said Friday in an interview with The Associated Press.
Apr 14, 2023
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Energy & Green Tech
For 35 years, the Emsland nuclear power plant in northwestern Germany has reliably provided millions of homes with electricity and many with well-paid jobs in what was once an agricultural backwater.
Apr 14, 2023
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A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter; a modern thermonuclear weapon weighing little more than a thousand kilograms can produce an explosion comparable to the detonation of more than a billion kilograms of conventional high explosive. Even small nuclear devices can devastate a city. Nuclear weapons are considered weapons of mass destruction, and their use and control has been a major aspect of international policy since their debut.
In the history of warfare, only two nuclear weapons have been detonated offensively, both near the end of World War II. The first was detonated on the morning of 6 August 1945, when the United States dropped a uranium gun-type device code-named "Little Boy" on the Japanese city of Hiroshima. The second was detonated three days later when the United States dropped a plutonium implosion-type device code-named "Fat Man" on the city of Nagasaki, Japan. These bombings resulted in the immediate deaths of around 120,000 people (mostly civilians) from injuries sustained from the explosion and acute radiation sickness, and even more deaths from long-term effects of ionizing radiation. The use of these weapons was and remains controversial. (See atomic bombings of Hiroshima and Nagasaki for a full discussion.)
Since the Hiroshima and Nagasaki bombings, nuclear weapons have been detonated on over two thousand occasions for testing purposes and demonstration purposes. The only countries known to have detonated nuclear weapons—and that acknowledge possessing such weapons—are (chronologically) the United States, the Soviet Union (succeeded as a nuclear power by Russia), the United Kingdom, France, the People's Republic of China, India, Pakistan, and North Korea. Israel is also widely believed to possess nuclear weapons, though it does not acknowledge having them. (For more information on these states' nuclear programs, as well as other states that formerly possessed nuclear weapons or are suspected of seeking nuclear weapons, see list of states with nuclear weapons.)
This text uses material from Wikipedia, licensed under CC BY-SA
