U.S. Department of Energy Research News

Showing stories 226-250 out of 892 stories.
Click to go to page: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 ]

9-Feb-2005
Beyond the standard model
At almost any particle physics conference, meeting, or lunch table, the phrase "physics beyond the Standard Model" is heard over and over again. What's wrong with the Standard Model, anyway? Why are physicists so sure that there is something beyond it? And why do they think they can find it anytime soon?

9-Feb-2005
Let it rain
Toward the end of a ten-year experiment in 1991, postdoc Hungye Dai of the University of Utah was puzzling over some really unusual data. The experiment was Fly's Eye, which pioneered a new method of studying ultra-high-energy cosmic rays by monitoring the faint flashes of ultraviolet light produced in the sky when the particles hit the upper atmosphere.

9-Feb-2005
Sold on cold
One hot day in August, particle physicists turned cold. That's the day the International Technology Recommendation Panel (ITRP) announced the decision to pursue "cold" superconducting technology for what physicists hope will be the world's next big particle accelerator, the International Linear Collider. Going cold, instead of recommending a "warm" option that had also been under development, has far-reaching consequences for laboratories, scientists, industries and governments across the globe. What does "cold" mean, and why did particle physics choose superconducting technology?

9-Feb-2005
Extreme neutrinos
Kurt Woschnagg has been waiting nine days to catch a plane to the South Pole. He flew for 15 hours from San Francisco to New Zealand, waited several days to spend another eight hours in a cargo plane to McMurdo Station in Antarctica, only to wait again for the weather to clear.

9-Feb-2005
The growth of inflation
It was a true Eureka moment if there ever was one. On the night of December 6, 1979, an obscure Stanford Linear Accelerator Center postdoc was up late, sweating over an even more obscure problem about particles called magnetic monopoles. Looking at his calculations the next day, the usually low-key Alan Guth annotated the words "Spectacular Realization" at the top of the page. Guth had discovered cosmic inflation, an idea which some have later called the most important in cosmology since the big bang.

9-Feb-2005
Nothing is simple for the Center for Global Security
As the saying goes, nothing is ever simple--especially when it involves Pacific Northwest National Laboratory's Center for Global Security. Even achieving some progress in solving global security problems often requires a complex and many-pronged effort.

9-Feb-2005
Innovative glass fibers shine in radiation detection
Being flexible in the rigid world of glass radiation detectors has made Pacific Northwest National Laboratory's glass fiber optic detectors very popular.

4-Feb-2005
First GLAST tracker arrives at SLAC
The Gamma Ray Large Area Telescope (GLAST) satellite project celebrated a milestone last month with the arrival of the first tracker module at SLAC.

2-Feb-2005
Virtual goes reality for Microproducts Breakthrough Institute
What has been a virtual institute between Pacific Northwest National Laboratory and the Oregon State University College of Engineering in essence will go "live" today as Dennis Stiles becomes the PNNL program manager for the Microproducts Breakthrough Institute at the Corvallis, Ore. facility.

1-Feb-2005
Russian weapons workers begin new commercial venture
One of the most remarkable political developments of the 20th century was the collapse of the Soviet Union. The satisfaction in the West of the downfall of communism, however, has been tempered by increasing worries that nuclear weapon materials and expertise might be transferred from the former Soviet Union (FSU) to unfriendly nations or even terrorist groups.

26-Jan-2005
'Interference' used to study inner structure of protons, neutrons
When you throw two rocks into a pond of water, side-by-side, the ripples created by the rocks will collide and annihilate each other in some areas and combine to make bigger ripples in others. Physicists call this phenomenon interference.

1-Jan-2005
A passion for computation benefits every discipline
It's no secret that computers are in Lawrence Livermore's blood. That passion for computation was one of the principal factors that brought me to Livermore three years ago to become associate director of Computation.

22-Dec-2004
Detector technology aids in development of cystic fibrosis therapy
Studies in mice with a new imaging technique perfected by Jefferson Lab's Detector Group suggest that researchers at Case Western Reserve University may have found a way to replace the gene that causes cystic fibrosis.

22-Dec-2004
Effective model of the atom gets more realistic
A new paper provides the first tool for describing the nucleus in terms of the most basic building blocks of everyday matter: quarks and gluons.

22-Dec-2004
New high precision experiment for Jefferson Lab
HYCAL, Jefferson Lab's newest detector took three years to design and build and will be put to the testmaking high precision measurements of the lifetime of the pion particle. This experiment could tell scientists more about symmetry in nature.

20-Dec-2004
X rays, detonations, and dead zones
The rapid, violent detonation of a high explosive (HE) generates supersonic shock waves that transfer energy by moving mass. According to Livermore physicist John Molitoris, trying to gather data on what happens to a material during this split second is often a case of "smoke and mirrors."

20-Dec-2004
The Art of protein structure prediction
From hemoglobin that carries oxygen, to enzymes and hormones that turn cells on and off, to antibodies that fight infection, proteins seem to do it all.

20-Dec-2004
Putting the squeeze on materials
Few gemstones are as mesmerizing as diamonds. Livermore physicists also find diamonds attractive but for reasons other than their beauty. The researchers use flawless, polished diamonds in opposing pairs, or anvils, to slowly compress samples of materials at extreme pressures.

20-Dec-2004
It's all in motion when simulating fluids
WHETHER it's the mechanics of a supernova, the ignition of an inertial confinement fusion (ICF) capsule, or the detonation of a nuclear weapon, simulating the motion of fluids is anything but simple. Every piece of the model is moving. Fluids interact with each other and with solid materials, plus those interactions occur quickly and at intense pressures and temperatures.

20-Dec-2004
High tech lab gets a high tech control room
Jefferson Lab's nerve center, the Machine Control Center, has been transformed into a state-of-the-art, technologically advanced and ergonomically sound control room ready to meet the challenges of a demanding user community

10-Dec-2004
Fastest gun in the West
SLAC partnered with CalTech, Fermilab, CERN and the University of Florida, along with groups from the UK, Brazil and Korea to defend its title as one of the fastest guns in the West--or, more accurately, the largest bandwidth, which is the computing equivalent.

1-Dec-2004
Nonproliferation: Traditional and nontraditional approaches
Tom Shea and Carol Kessler discuss the issues involved in nonproliferation and international nuclear arms.

1-Dec-2004
Big project reveals secrets of tiny materials
A big project studying the characteristics of the very small will provide insight into new materials with unprecedented properties. These small systems can be only a few atoms wide and are measured in billionths of meters, or nanometers.

10-Nov-2004
Piloting the pipeline
R pal. The automated pipeline. Mass spec and proteomics. These phrases are used by ORNL researchers who probe microbes to determine what these "bugs" are made of and what drives them.

10-Nov-2004
Pathways underlying disorders
Abnormalities of the face and skull rank among the most common birth defects in humans. Understanding such complex human disorders requires a systems biology approach, according to Cymbeline Culiat, a molecular geneticist in ORNL's Life Sciences Division.