Business
Air passenger numbers in Europe are expected to drop by 60 percent in 2020 due to the coronavirus crisis, the global aviation industry said Thursday, with the recovery looking highly uncertain.
Aug 13, 2020
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Robotics
Engineering researchers at North Carolina State University and Temple University have developed soft robots inspired by jellyfish that can outswim their real-life counterparts. More practically, the new jellyfish-bots highlight ...
Jul 1, 2020
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Energy & Green Tech
Tech aimed at battling climate change and even pumping fresh water out of thin air attracted crowds as the annual CES gadget extravaganza showed its green side.
Jan 13, 2024
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Engineering
Home owners, especially those in noisy districts, can look forward to greater living comfort with a new invention by researchers from the National University of Singapore (NUS) School of Design and Environment (SDE) that ...
Feb 4, 2021
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Computer Sciences
(Tech Xplore)—IBM and the Air Force Research Laboratory are working to develop an artificial intelligence-based supercomputer with a neural network design that is inspired by the human brain.
Robotics
Roboticists worldwide have been trying to develop autonomous unmanned aerial vehicles (UAVs) that could be deployed during search and rescue missions or that could be used to map geographical areas and for source-seeking. ...
Automotive
Currently, 90 percent of fuel used for transportation is petroleum-based, making it one of the key contributors to air pollution worldwide. Recent technological advances, however, are finally enabling the development of new ...
Consumer & Gadgets
It's very rare to see any travel video or brochure these days that doesn't have an image shot from overhead, on a drone.
May 11, 2020
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Business
Hyundai announced Monday it would mass produce flying cars for Uber's aerial rideshare network set to deploy in 2023.
Jan 7, 2020
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Energy & Green Tech
The worldwide demand for air conditioning is expected to triple over the next 30 years, making the pursuit of energy-efficient cooling systems a top priority, the International Energy Agency said Tuesday.
May 15, 2018
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The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. It has a mass of about five quadrillion metric tons. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. An altitude of 120 km (75 mi) marks the boundary where atmospheric effects become noticeable during atmospheric reentry. The Kármán line, at 100 km (62 mi), is also frequently regarded as the boundary between atmosphere and outer space. Three quarters of the atmosphere's mass is within 11 km (6.8 mi; 36,000 ft) of the surface.
This text uses material from Wikipedia, licensed under CC BY-SA
