The transistor laser invented by scientists at the University of Illinois at Urbana-Champaign has now been found to possess fundamental non-linear characteristics that are new to a transistor and permit its use as a dual-input, dual-output, high-frequency signal processor.
“We have hit upon something surprisingly fundamental and rich in possibilities,” said Nick Holonyak Jr., a John Bardeen Chair Professor of Electrical and Computer Engineering and Physics at Illinois. “We have
Chandra observations of the massive spiral galaxy NGC 5746 revealed a large halo of hot gas (blue) surrounding the optical disk of the galaxy (white). The halo extends more than 60,000 light years on either side of the disk of the galaxy, which is viewed edge-on.
The galaxy shows no signs of unusual star formation, or energetic activity from its nuclear region, making it unlikely that the hot halo is produced by gas flowing out of the galaxy. Computer simulations and Chandra dat
The European Integrated Project ProeTEX (Protection e-Textiles: MicroNanoStructured fibre systems for Emergency-Disaster Wear) just started its activities. The project aims to develop an integrated set of functionalized garments for emergency disaster personnel, capable of monitoring physiological and environmental parameters, improving their safety, coordination and efficiency.
The project, launched today, February 3, in Luzern (CH), with a funding of 12 million euros, involves 23 European
Comet Tempel 1, target of last year’s July 4 cosmic collision, contains small amounts of surface water ice. Reported in Science by members of NASA’s Deep Impact mission, this finding marks the first evidence of surface ice on any comet.
Comet Tempel 1, which created a flamboyant Fourth of July fireworks display in space last year, is covered with a small amount of water ice. These results, reported by members of NASA’s Deep Impact team in an advanced online edition of Science,
Scientists have demonstrated the first reproducible, controllable silicon transistors that are turned on and off by the motion of individual electrons. The experimental devices, designed and fabricated at NTT Corp. of Japan and tested at NIST, may have applications in low-power nanoelectronics, particularly as next-generation integrated circuits for logic operations (as opposed to simpler memory tasks).
The transistors, described in the Jan. 30, 2006, issue of Applied Physics Lette
“Particle physics has an exciting future” : this was the key message emerging from the Open Symposium on particle physics strategy in Europe, which concluded at Orsay, France, today.
Organised by the CERN Council Strategy Group, this Symposium is the first of a series of events that will conclude in Lisbon on 14 July 2006, when the Group will present its long-term vision for particle physics in Europe to the 20 European states of the CERN Council.
The aim of the Symp
A bound pair of icy comets similar to the dirty snowballs circling outside the orbit of Neptune has been found lurking in the shadow of Jupiter.
Astronomers at the University of California, Berkeley, working with colleagues in France and at the Keck Telescope in Hawaii, have calculated the density of a known binary asteroid system that shares Jupiter’s orbit, and concluded that Patroclus and its companion probably are composed mostly of water ice covered by a patina of dirt.
A simple but groundbreaking experiment performed more than 70 years ago finally has been explained by scientists at the University of Illinois at Urbana-Champaign. The solution sheds new light on fluid turbulence — the last major unsolved problem in classical physics.
“Turbulence is the jittery, swirling behavior of a gas or liquid when flowing next to a wall or around an obstacle,” said Gustavo Gioia, a professor of theoretical and applied mechanics at Illinois. “Although
An international team of scientists affiliated with the University of Wisconsin-Madison Nanoscale Science and Engineering Center has coaxed a self-assembling material into forming never-before-seen, three-dimensional nanoscale structures, with potential applications ranging from catalysis and chemical separation to semiconductor manufacturing.
Led by UW-Madison chemical and biological engineering professors Paul Nealey and Juan de Pablo and colleagues at Georg-August University
A team of researchers from Rensselaer Polytechnic Institute, Purdue University, and the Russian Academy of Sciences has used sound waves to induce nuclear fusion without the need for an external neutron source, according to a paper in the Jan. 27 issue of Physical Review Letters. The results address one of the most prominent questions raised after publication of the team’s earlier results in 2004, suggesting that “sonofusion” may be a viable approach to producing neutrons for a variety of appl
Researchers from Liverpool John Moores University’s Astrophysics Research Institute working as part of an international team of experts have made an exciting discovery that could help in the ongoing search for ‘other Earths’.
Mike Bode, LJMU’s Professor in Astrophysics, explained: “Until the 1990s, the only planets we knew of were the ones that orbited the Sun in our Solar System. Over the last 10 years, we have discovered around 170 planets around other stars, known as
Single-walled carbon nanotubes wrapped with DNA can be placed inside living cells and detect trace amounts of harmful contaminants using near infrared light, report researchers at the University of Illinois at Urbana-Champaign. Their discovery opens the door to new types of optical sensors and biomarkers that exploit the unique properties of nanoparticles in living systems.
“This is the first nanotube-based sensor that can detect analytes at the subcellular level,” said Michael Str
Working with an international team of scientists, a Florida State University physics professor has taken part in an experiment that resulted in the creation of a silver atom with exotic properties never before observed. The team’s observations represent another step forward in science’s long journey to understand the nuclear reactions that power stars and produce all matter.
Sam Tabor, a professor of experimental nuclear physics at FSU and director of the university’
Distant Planet Brings Astronomers Closer To Home
Using a network of telescopes scattered across the globe, including the Danish 1.54m telescope at ESO La Silla (Chile), astronomers [1] discovered a new extrasolar planet significantly more Earth-like than any other planet found so far. The planet, which is only about 5 times as massive as the Earth, circles its parent star in about 10 years. It is the least massive exoplanet around an ordinary star detected so far and also the
Discovery of small, rocky, extrasolar world suggests such planets may be common
Using a relatively new planet-hunting technique that can spot worlds one-tenth the mass of our own, researchers have discovered a potentially rocky, icy body that may be the smallest planet yet found orbiting a star outside our solar system.
The discovery suggests the technique, gravitational microlensing, may be an exceptional technology for finding distant planets with traits that could su
Perhaps edging closer to finding planets that harbor life, astronomers have discovered the smallest planet yet identified outside our solar system.
Researchers, including a University of Florida astronomer, found the planet, which has a mass about five times that of Earth, orbiting a small star near the center of the galaxy in the constellation Sagittarius.
Located about three times as far away from its star as the distance from Earth to the sun, it is probably too cold
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