The Technology Portal
Technology ("science of craft", from Greek τέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia) is the sum of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, or it can be embedded in machines to allow for operation without detailed knowledge of their workings. Systems (e. g. machines) applying technology by taking an input, changing it according to the system's use, and then producing an outcome are referred to as technology systems or technological systems.
The simplest form of technology is the development and use of basic tools. The prehistoric discovery of how to control fire and the later Neolithic Revolution increased the available sources of food, and the invention of the wheel helped humans to travel in and control their environment. Developments in historic times, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale.
Technology has many effects. It has helped develop more advanced economies (including today's global economy) and has allowed the rise of a leisure class. Many technological processes produce unwanted by-products known as pollution and deplete natural resources to the detriment of Earth's environment. Innovations have always influenced the values of a society and raised new questions in the ethics of technology. Examples include the rise of the notion of efficiency in terms of human productivity, and the challenges of bioethics.
Philosophical debates have arisen over the use of technology, with disagreements over whether technology improves the human condition or worsens it. Neo-Luddism, anarcho-primitivism, and similar reactionary movements criticize the pervasiveness of technology, arguing that it harms the environment and alienates people; proponents of ideologies such as transhumanism and techno-progressivism view continued technological progress as beneficial to society and the human condition.
Gas tungsten arc welding
is an arc welding
process that uses a nonconsumable tungsten electrode
to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas
(usually an inert gas such as argon
), and a filler metal
is normally used, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply
produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma
. GTAW is most commonly used to weld thin sections of stainless steel
and light metals such as aluminum
, and copper
alloys. The process grants the operator greater control over the weld than competing procedures such as shielded metal arc welding
and gas metal arc welding
, allowing for stronger, higher quality welds. However, GTAW is comparatively more complex and difficult to master, and furthermore, it is significantly slower than most other welding techniques. A related process, plasma arc welding
, uses a slightly different welding torch to create a more focused welding arc and as a result is often automated.
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Did you know...
(1913–2006) was a Soviet
intelligence officer. According to Russian sources, Koval's infiltration of the Manhattan Project
as a Soviet Main Intelligence Directorate
(GRU) agent "drastically reduced the amount of time it took for Russia to develop nuclear weapons". Koval was born to Jewish immigrants in Sioux City, Iowa
. Shortly after reaching adulthood he traveled with his parents to the Soviet Union to settle in the Jewish Autonomous Region
near the Chinese border. Koval was recruited by the GRU, trained, and assigned the code name DELMAR. He returned to the United States in 1940 and was drafted into the US Army in early 1943. Koval worked at atomic research laboratories and, according to the Russian government, relayed back to the Soviet Union information about the production processes and volumes of the polonium
, and uranium
used in American atomic weaponry, in addition to descriptions of the weapon production sites. After the war, Koval left on a European vacation but never returned to the United States. In 2007 Russian President Vladimir Putin
posthumously awarded Koval the Hero of the Russian Federation
decoration for "his courage and heroism while carrying out special missions".
- Parent project
- Related projects
- November 18, 2019 –
- Japan opens its first military arms show, as it tries to improve its military technology to combat external threats from China and North Korea. (Reuters)
- November 11, 2019 –
- The wreckage of United States Navy submarine USS Grayback (SS-208), which disappeared with its 80 crew members in the East China Sea on February 27, 1944 during World War II, is discovered on the sea floor using new drone technology. (BBC News) (CNN)
- September 27, 2019 –
- UK Prime Minister Boris Johnson is formally referred to the Independent Office for Police Conduct (IOPC) amid allegations of corruption during his tenure as Mayor of London. Johnson is alleged to have awarded a close friend, American technology entrepreneur Jennifer Arcuri, "thousands of pounds" in public business funding, according to the The Sunday Times. (The Guardian)
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