Cities only occupy about 3% of the Earth's total land surface, but they bear the burden of the human-perceived effects of global climate change, researchers said. Global climate models are set up for big-picture analysis, ...
Earth Sciences
Jan 4, 2021
1
71
Alkaline water electrolysis has been touted as a path to establish a hydrogen economy by converting intermittent renewable energies into clean hydrogen-based chemical energy.
Materials Science
Nov 24, 2020
4
1148
The gravitational force in the Universe under which it has evolved from a state almost uniform at the Big Bang until now, when matter is concentrated in galaxies, stars and planets, is provided by what is termed 'dark matter." ...
Astronomy
Oct 28, 2020
65
3689
Electrolysis, passing a current through water to break it into gaseous hydrogen and oxygen, could be a handy way to store excess energy from wind or solar power. The hydrogen can be stored and used as fuel later, when the ...
Materials Science
May 26, 2020
3
1516
Hall thrusters (HTs) are used in earth-orbiting satellites, and also show promise to propel robotic spacecraft long distances, such as from Earth to Mars. The propellant in a HT, usually xenon, is accelerated by an electric ...
Plasma Physics
Aug 15, 2017
3
1053
Star formation environments can be roughly grouped into three types, categorized by the density of their gas (or more precisely, the projected "surface" density of the gas, which is easier to determine than the conventional ...
Astronomy
Feb 8, 2016
1
58
A newborn star typically has a disk of gas and dust from which planets develop as the dust grains collide, stick together and grow. Stars older than about five million years lack evidence for these disks, however, suggesting ...
Astronomy
Dec 14, 2015
3
275
As talks of global warming are once again making headlines, scientists have renewed their efforts to understand how to best limit its effects. For example, sequestrating short-lived climate pollutants, such as methane and ...
Condensed Matter
Dec 2, 2015
0
9
Vehicles churn out about 28 percent of the carbon dioxide (CO2) generated from fossil fuels in the United States, and their contribution keeps climbing, particularly in urban areas. But planners and policymakers have lacked ...
Environment
Apr 6, 2015
0
76
(Phys.org) —A University of Alabama in Huntsville graduate student and a recent UAH doctoral graduate are exploring surprising data from Voyager 1's crossing of the heliopause into the interstellar medium of our galaxy.
Space Exploration
Sep 25, 2013
8
0
