"MEMS-Sensor entdeckt Viruspartikel in Echtzeit"
Mit einem MEMS-basierenden Sensor wurde vor kurzem zum ersten Mal ein einzelnes Viruspartikel entdeckt. Der kleine Ausleger des MEMS (micro electromechanical system) mit den Abmessungen von 1 x 4 Mikron und einer 'Dicke' von nur 20 nm vibriert mit einer bestimmten Frequenz, bis ein Viruspartikel auf ihm 'landet' und damit seine Resonanzfrequenz ver�ndert. Ein Viruspartikel des Vaccinia-a Virus, der die Basis des Pockenimpfstoffes ist, wiegt zum Beispiel nur neun Femtogramm (9x10E-15 Gramm). "Unsere erste Aufgabe war es nachzuweisen, dass ein derart kleiner und empfindlicher Ausleger herstellbar ist und seine Resonanzfrequenz sich bereits durch ein Viruspartikel ver�ndert," erl�utert Rashid Bashir, ein Associate Professor f�r Elektro-, Computer- und biomedizinische Technik am Birck Nanotechnology Center der Purdue University in West Lafayette.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040219S0007
Tuesday, February 17, 2004
"CHIPS: IBM claims SiGe speed records"
IBM Corp. is claiming its silicon-germainum chip technology earns top honors in both bits-per-second and clock-frequency metrics. The announcement is expected Tuesday (Feb.17) at the International Solid-State Circuits Conference in San Francisco. Silicon bests indium phosphide, according to IBM, and its proof is an experimental multiplexor communicating at speeds of up to 132 Gbits/s. The company will also report on a 60-GHz silicon-germanium transceiver for wireless networks.
Audio Interview / Text: http://www.eetimes.com/story/OEG20040217S0001
IBM Corp. is claiming its silicon-germainum chip technology earns top honors in both bits-per-second and clock-frequency metrics. The announcement is expected Tuesday (Feb.17) at the International Solid-State Circuits Conference in San Francisco. Silicon bests indium phosphide, according to IBM, and its proof is an experimental multiplexor communicating at speeds of up to 132 Gbits/s. The company will also report on a 60-GHz silicon-germanium transceiver for wireless networks.
Audio Interview / Text: http://www.eetimes.com/story/OEG20040217S0001
Monday, February 16, 2004
"MEMS: sensor detects single virus particle in real-time"
Detection of a single virus particle was recently demonstrated for the first time in a sensor based on microelectromechanical systems (MEMS). The tiny cantilever, measuring just 1 x 4 microns x 20 nanometers thick, vibrates at a fixed frequency until a virus particle lands on it, which changes its resonance enough to be detected. A single particle of vaccinia-a virus that forms the basis for the smallpox vaccine-weighs only 9 femtograms, or quadrillionths of a gram.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040213S0009
Detection of a single virus particle was recently demonstrated for the first time in a sensor based on microelectromechanical systems (MEMS). The tiny cantilever, measuring just 1 x 4 microns x 20 nanometers thick, vibrates at a fixed frequency until a virus particle lands on it, which changes its resonance enough to be detected. A single particle of vaccinia-a virus that forms the basis for the smallpox vaccine-weighs only 9 femtograms, or quadrillionths of a gram.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040213S0009
"OPTICAL: photonic computer components unveiled"
Photonic microchips were enabled Sunday (Feb. 15) by Cornell University's announcement at the American Association for the Advancement of Science (AAAS) in Seattle, of having fabricated all the components for silicon optical computers that use light instead of electrons. Wires were replaced by beams of light routed on-chip through air by silicon waveguides controlled by electro-optical switches, and off-chip by a "pin hole" lens connecting to normal optical fibers
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040216S0019
Photonic microchips were enabled Sunday (Feb. 15) by Cornell University's announcement at the American Association for the Advancement of Science (AAAS) in Seattle, of having fabricated all the components for silicon optical computers that use light instead of electrons. Wires were replaced by beams of light routed on-chip through air by silicon waveguides controlled by electro-optical switches, and off-chip by a "pin hole" lens connecting to normal optical fibers
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040216S0019
Thursday, February 12, 2004
"ROBOT: fliers promise bird's-eye view for surveillance"
If you'd watched the fumbling attempts to re-create the first airplane during the celebration of the 100th anniversary of human flight last year, you might have thought little progress had been made between 1903 and 2003. But if you had watched the real birds flocking around the robotic birds being flown over the University of Delaware recently, you'd think otherwise. The "birds" built by mechanical-engineering professor Sunil Agrawal and his team at Delaware advance the capabilities of unmanned aircraft, which until now have been fixed-wing designs.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040212S0020
If you'd watched the fumbling attempts to re-create the first airplane during the celebration of the 100th anniversary of human flight last year, you might have thought little progress had been made between 1903 and 2003. But if you had watched the real birds flocking around the robotic birds being flown over the University of Delaware recently, you'd think otherwise. The "birds" built by mechanical-engineering professor Sunil Agrawal and his team at Delaware advance the capabilities of unmanned aircraft, which until now have been fixed-wing designs.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040212S0020
Monday, February 09, 2004
"NANOTECH: composite nanotubes grown at room temperatuure"
Researchers at the Weizmann Institute of Science (Rehovot, Israel) have demonstrated composite nanotubes of gold, silver, palladium and copper that were created at room temperature-a claimed first-in a three-step process. The composite structures support the scientists' claim that their process enables application-specific formulations exhibiting electrical and optical properties tuned for use in sensors, catalysts and chemistry-on-a-chip devices.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040209S0037
Researchers at the Weizmann Institute of Science (Rehovot, Israel) have demonstrated composite nanotubes of gold, silver, palladium and copper that were created at room temperature-a claimed first-in a three-step process. The composite structures support the scientists' claim that their process enables application-specific formulations exhibiting electrical and optical properties tuned for use in sensors, catalysts and chemistry-on-a-chip devices.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040209S0037
"SENSOR: Prof claims 5� device can sniff out ricin"
As government workers closed three Senate office buildings last week after intercepting a letter containing the deadly poison ricin, researchers at Pennsylvania State University said they have developed a cheap, wireless, ready-to-go sensor able to detect ricin and as many as nine other toxins simultaneously.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040209S0008
As government workers closed three Senate office buildings last week after intercepting a letter containing the deadly poison ricin, researchers at Pennsylvania State University said they have developed a cheap, wireless, ready-to-go sensor able to detect ricin and as many as nine other toxins simultaneously.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040209S0008
Thursday, February 05, 2004
"NEURAL: software could become soldier's best friend"
Researchers at Sandia National Laboratories are using neural-network technology to create software that automatically offers individual real-time advice to soldiers and other government teams in the field. Akin to the promptings that newscasters get from their producers via earplugs during a broadcast, mentoring (as the technique is called) has already proved valuable to military teams in achieving mission goals. But instead of a human mentor, the Sandia group is looking to devise a software mentor that could offer advice like "take a deep breath and relax your upper body" or "pay attention to what Private Smith is about to say, his excitement level indicates it could be important." The researchers recently used a neural network to learn the signatures of abstract desirable traits like "leadership," as well as warning signs such as "nervous," "afraid" or "daydreaming," by analyzing the pulse, respiration, perspiration, facial expressions, head movements and other biometric data streams coming from sensors attached to group members. Goals could be achieved in a stressful virtual environment only if the group cooperated effectively. By perfecting their approach in virtual reality, the scientists hope to someday enable automatic advice and counsel from a virtual mentor.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040202S0043
Researchers at Sandia National Laboratories are using neural-network technology to create software that automatically offers individual real-time advice to soldiers and other government teams in the field. Akin to the promptings that newscasters get from their producers via earplugs during a broadcast, mentoring (as the technique is called) has already proved valuable to military teams in achieving mission goals. But instead of a human mentor, the Sandia group is looking to devise a software mentor that could offer advice like "take a deep breath and relax your upper body" or "pay attention to what Private Smith is about to say, his excitement level indicates it could be important." The researchers recently used a neural network to learn the signatures of abstract desirable traits like "leadership," as well as warning signs such as "nervous," "afraid" or "daydreaming," by analyzing the pulse, respiration, perspiration, facial expressions, head movements and other biometric data streams coming from sensors attached to group members. Goals could be achieved in a stressful virtual environment only if the group cooperated effectively. By perfecting their approach in virtual reality, the scientists hope to someday enable automatic advice and counsel from a virtual mentor.
Audio Interviews / Text: http://www.eetimes.com/story/OEG20040202S0043
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