Submitted by ksvitil on Fri, 2010-04-23 07:00
We are not alone—even in our own bodies. The human gut is home to 100 trillion bacteria, which have co-evolved along with our digestive and immune systems. Most people view bacteria as harmful pathogens causing infections and disease. But some microbes, taking a different evolutionary path, have established beneficial relationships with their hosts. Still others may be perched somewhere in between, according to research by Caltech biologists that offers new insight into the causes of inflammatory bowel disease and colon cancer.
Submitted by lorio on Thu, 2010-04-22 07:00
A group of scientists led by researchers from Caltech has engineered a type of artificial optical material—a metamaterial—with a particular three-dimensional structure such that light exhibits a negative index of refraction upon entering the material. In other words, this material bends light in the "wrong" direction from what normally would be expected, irrespective of the angle of the approaching light.
Submitted by Anonymous (not verified) on Thu, 2010-04-22 07:00
R. David Middlebrook, emeritus professor of electrical engineering at the California Institute of Technology (Caltech), passed away on April 16. He was 80 years old.
Submitted by ksvitil on Wed, 2010-04-21 07:00
Taking inspiration from a popular executive toy ("Newton's cradle"), researchers at Caltech have built a device—called a nonlinear acoustic lens—that produces highly focused, high-amplitude acoustic signals dubbed "sound bullets." The acoustic lens and its sound bullets (which can exist in fluids—like air and water—as well as in solids) have the potential to revolutionize applications from medical imaging and therapy to the nondestructive evaluation of materials and engineering systems.
Submitted by admin on Wed, 2010-03-24 07:00
Producing coherent light on a microchip is old hat—LED lasers underpin our high-tech world, appearing in gadgets ranging from DVD players and supermarket checkout scanners to digital data lines. A new chip-compatible component developed at Caltech can produce coherent sound as well, and even interconvert the two. Who knows where this marriage of sound and light might lead?
Submitted by Anonymous (not verified) on Wed, 2010-02-24 08:00
Research in genomic sciences, astronomy, seismology, and neuroeconomics are some of the many projects being funded at the California Institute of Technology (Caltech) by the American Recovery and Reinvestment Act (ARRA).
Submitted by lorio on Tue, 2010-02-16 08:00
Using arrays of long, thin silicon wires embedded in a polymer substrate, a team of scientists from the California Institute of Technology (Caltech) has created a new type of flexible solar cell that enhances the absorption of sunlight and efficiently converts its photons into electrons. The solar cell does all this using only a fraction of the expensive semiconductor materials required by conventional solar cells.
Submitted by debwms on Mon, 2010-02-15 19:59
Scientists at the California Institute of Technology (Caltech) have demonstrated that high-speed intersonic ruptures exist and could occur during the next major earthquake. The researchers now have the ability to create laboratory earthquakes of varying force and magnitudes that mimic actual quakes. By triggering laboratory earthquakes, researchers can study the behavior of quakes and their potential force and destructiveness—without a real quake actually occurring.
Submitted by ksvitil on Tue, 2010-02-09 08:00
Caltech researchers have developed a way to make some notoriously brittle materials ductile—yet stronger than ever—simply by reducing their size. The work could eventually lead to innovative, superstrong, yet light and damage-tolerant materials. These materials could be used as components in structural applications, such as in lightweight aerospace vehicles that last longer under extreme environmental conditions and in naval vessels that are resistant to corrosion and wear.
Submitted by ksvitil on Mon, 2009-12-21 23:00
Researchers at the Caltech have proposed a new paradigm that should allow scientists to observe quantum behavior in small mechanical systems. Their ideas, described in the early online issue of the Proceedings of the National Academy of Sciences, offer a new means of addressing one of the most fascinating issues in quantum mechanics: the nature of quantum superposition and entanglement in progressively larger and more complex systems.