Zu den faszinierendsten Projekten bei der Erforschung des Weltalls gehört die bereits im Jahr 2004 gestartete Mission Rosetta der Europäischen Weltraumorganisation ESA, die den Kometen 67P/Churyumov-Gerasimenko untersuchen soll. Zum ersten Mal wird eine Raumsonde einem Kometen auf seinem Weg zur Sonne folgen und auf ihm landen. (more…)
Due to deep passion for physics, Romain Fleury, after completion of his engineering diploma in France, joined the research group of Prof. Andrea Alù at the University of Texas at Austin, where he is currently pursuing a Ph.D degree. His research focuses on metamaterials, a new branch of science and technology that is making its way to maturity. (more…)
Technique From Berkeley Lab’s Molecular Foundry Could Also Work with Graphene
“Cool it!” That’s a prime directive for microprocessor chips and a promising new solution to meeting this imperative is in the offing. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a “process friendly” technique that would enable the cooling of microprocessor chips through carbon nanotubes.
Frank Ogletree, a physicist with Berkeley Lab’s Materials Sciences Division, led a study in which organic molecules were used to form strong covalent bonds between carbon nanotubes and metal surfaces. This improved by six-fold the flow of heat from the metal to the carbon nanotubes, paving the way for faster, more efficient cooling of computer chips. The technique is done through gas vapor or liquid chemistry at low temperatures, making it suitable for the manufacturing of computer chips. (more…)
A storm of stars is brewing in the Trifid nebula, as seen in this view from NASA’s Wide-field Infrared Survey Explorer, or WISE. The stellar nursery, where baby stars are bursting into being, is the yellow-and-orange object dominating the picture. Yellow bars in the nebula appear to cut a cavity into three sections, hence the name Trifid nebula.
Colors in this image represent different wavelengths of infrared light detected by WISE. The main green cloud is made up of hydrogen gas. Within this cloud is the Trifid nebula, where radiation and winds from massive stars have blown a cavity into the surrounding dust and gas, and presumably triggered the birth of new generations of stars. Dust glows in infrared light, so the three lines that make up the Trifid, while appearing dark in visible-light views, are bright when seen by WISE. (more…)
The internal circadian clock of a Drosophila (fruit fly) can be synchronised using vibrations, according to research published today in the journal Science. The study suggests that an animal’s own movements can influence its clock.
The circadian clock, which underlies the daily rhythms characterising most of our bodily functions, including the sleep cycle, is mainly set by diurnal changes in light and temperature. (more…)
AUSTIN, Texas — A team of researchers at The University of Texas at Austin’s Cockrell School of Engineering has built the first-ever circulator for sound. The team’s experiments successfully prove that the fundamental symmetry with which acoustic waves travel through air between two points in space (“if you can hear, you can also be heard”) can be broken by a compact and simple device.
“Using the proposed concept, we were able to create one-way communication for sound traveling through air,” said Andrea Alù, who led the project and is an associate professor and David & Doris Lybarger Endowed Faculty Fellow in the Cockrell School’s Department of Electrical and Computer Engineering. “Imagine being able to listen without having to worry about being heard in return.” (more…)
Innsbrucker Informatiker unterstützen mit zwei Forschungsarbeiten den Tiroler Lawinenwarndienst. Ziel ist es, dem Warndienst seine Arbeit zu erleichtern. Ein aus einer Masterarbeit hervorgegangenes Programm ist bereits im produktiven Einsatz und beschleunigt die Arbeit der Lawinenexperten.
Laut Saisonbericht der österreichischen Lawinenwarndienste starben in der vergangenen Wintersaison 27 Personen durch Lawinen, 58 Personen wurden verletzt. Auch im laufenden Winter gab es bereits Lawinentote. Schaut man sich die Zahlen im langjährigen Durchschnitt an, so erkennt man trotz des drastischen Anstieges an Wintersportlern, die sich im freien Skigelände aufhalten, einen gleichbleibenden Trend. Dies verdeutlicht u.a. die Bedeutung der Lawinenwarndienste: Für die Einschätzung der Lawinengefahr sind in Tirol der Lawinenwarndienst, in den einzelnen Gemeinden die Lawinenkommissionen zuständig. Mit zwei Forschungsarbeiten unterstützen Innsbrucker Informatik-Studenten den Lawinenwarndienst in der täglichen Arbeit. Das Ergebnis einer der beiden Arbeiten ist bereits im produktiven Einsatz. „Ein wichtiger Teil der Arbeit des Lawinenwarndienstes sowie der Lawinenkommissionen ist die genaue Analyse der Schneedecke und deren Interaktion mit dem aktuellen Wettergeschehen“, erklärt DI Robert Binna, wissenschaftlicher Mitarbeiter der Forschungsgruppe Datenbanken und Informationssysteme (DBIS) am Institut für Informatik. (more…)
The team operating NASA’s Mars rover Curiosity is considering a path across a small sand dune to reach a favorable route to science destinations.
A favorable route would skirt some terrain with sharp rocks considered more likely to poke holes in the rover’s aluminum wheels.
While the team has been assessing ways to reduce wear and tear to the wheels, Curiosity has made progress toward a next site for drilling a rock sample and also toward its long-term destination: geological layers exposed on slopes of Mount Sharp. The rover has driven into a mapping quadrant that includes a candidate site for drilling. Meanwhile, testing on Earth is validating capabilities for drilling into rocks on slopes the rover will likely encounter on Mount Sharp. (more…)
