The Habitable Exoplanets Catalog (HEC) is an online database for scientists, educators, and the general public focused on potential habitable exoplanets discoveries. The catalog uses various habitability indices and classifications to identify, rank, and compare exoplanets, including potential satellites, or exomoons. Check the NEWS section for news and updates. A full database of exoplanets is available in the DATA section. The catalog is updated as new data is available. Latest entry is Gliese 581g.
There's a new bond in town, and this secret agent works best in extreme situations.
The bond, of the chemical variety, occurs in the presence of very strong magnetic fields, such as those found around ultra-dense white dwarf stars. Its discovery not only demonstrates the existence of an unfamiliar and exotic type of chemistry, it may also give insight into the behaviours of these mysterious stellar bodies.
Ebooks are finally taking off and entering the mainstream with devices like the Kindle or Sony’s Ebook Reader. What’s missing is a good software program to manage ebook collections. Calibre is a multi-platform ebook manager that can display, convert, list and sync ebooks. Program versions are available for the Windows, Linux and Mac OS X operating system.
The use of cannabis is not associated with "enduring negative effects" on the cognitive skills in moderate to heavy marijuana consumers, according to a meta-analysis to be published in the journal Experimental and Clinical Psychopharmacology.
Lockheed Martin [NYSE: LMT] and LaserMotive, Inc., a privately held research and development company that specials in laser power beaming, recently demonstrated the capabilities of a laser power system to extend the Stalker unmanned aerial vehicle (UAV) flight time to more than 48 hours. This increase in flight duration represents an improvement of 2,400 percent.
Children quickly learn to avoid negative situations and seek positive ones. But humans are not the only species capable of remembering positive and negative events; even the small brain of a fruit fly has this capacity.
Jocelyn Bell Burnell, a British astrophysicist at Oxford University who discovered the first radio pulsars with her thesis supervisor Antony Hewish, for which Hewish shared the Nobel Prize in Physics, Speaking at the Euroscience Open Forum...
Derrick Pitts, chief astronomer for the Franklin Institute, elaborates on a prediction from a team of international astronomers who claim there could be billions of potentially habitable “super Earths” circling stars within our galaxy.
Boston MA (SPX) Jul 10, 2012 - It's a challenge that's long been one of the holy grails of quantum computing: how to create the key building blocks known as quantum bits, or qubits, that exist in a solid-state system at room temp...
"MEMS maturity depends on the application," explains Theodore Chi, director of marketing and sales at Innovative Microtechnology Inc. in Santa Barbara, Calif. "MEMS technology is not an industry; rather, it is what we have learned over the past 50 years in microelectronics and applying it to processes other than CMOS."
Physicists in the US may have ended a decade-old debate about how the Casimir force – which affects objects separated by tiny distances – should be calculated for two metal objects. They say that the so-called Drude model, which treats metal as a collection of billiard-ball-like positive ions and electrons, wins out over the "plasma model", which assumes the electrons move in a fixed lattice of positive ions. Understanding how to determine the force could play an important role in the design of micrometre- and nanometre-sized machines.
The Casimir force was first predicted in 1948 by Dutch physicist Hendrik Casimir, who considered what happens when two uncharged, perfectly conducting metal plates are placed opposite one another in a vacuum. According to quantum mechanics, the energy of an electromagnetic field in a vacuum is not zero but continuously fluctuates around a certain mean value. However, resonance means that only certain wavelengths will exist between two plates separated by a particular distance.
What Casimir worked out was that the radiation pressure of the field outside the plates will tend to be slightly greater than that between the plates, which will therefore be attracted to one another. As it is so tiny, the Casimir force proved extremely difficult to measure and it was not until 1997 that Steve Lamoreaux, then at the University of Washington in the US, provided the first firm experimental confirmation of Casimir's theory. Although Lamoreaux and others have since made better measurements, an important mystery remained regarding how the Casimir force should be calculated for realistic objects.
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