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Written by Henk van Esch
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Tuesday, 13 January 2009 16:39 |
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Renault’s Z.E. Concept: An all-electric zero-emissions concept vehicle. Good Energy - Route to alternative energy technologies By Amanda Jaffe-Katz An innovative interdisciplinary course, “Clean Energy: Technology under Policy and Economic Constraints,” was first offered at Technion by Lady Davis Visiting Professor to the Faculty of Mechanical Engineering, Prof. Isa Bar-On. Her students explored alternative energy options encompassing such topics as Energy from Waste, Solar Power, and Wind Energy, as well as the electric car grid venture, Better Place, spearheaded by Technion alumnus Shai Agassi.
“It has been a very positive experience with the students,” Bar-On reports toward the end of her one-year sabbatical in July 2008. “Clearly, having more PhD students raises the level of the course.” There are 19 graduate students participating in the discussion group who major in different disciplines including Environmental Science, Materials Engineering, and Mechanical Engineering. Bar-On’s teaching strategy requires her students to do “real work,” that includes responding to readings by posting paragraphs on Moodle (Technion’s main online teaching application) and final presentations. Most of this communication is conducted in English‚ “a very nice effort by the students,” Bar-On comments. “The students’ goal is to get a draft paper ready for publication, and then I award them a grade of 100,” she summarizes.
Her aim is to emphasize how the technology works within the complex system of society. With regard to the Better Place initiative, Bar-On says, “We’re not looking at the psychological concerns associated with marketing, but rather at environmental and lifecycle issues. My question is: who picks up the tab for this high-level activity?”
Born and raised in post-WWII Germany, Bar-On arrived alone in Israel after high school. She completed degrees at the Hebrew University of Jerusalem’s School for Applied Science, whose objective, she says, was to turn scientists not into engineers but technologists. During her postdoctoral studies, Bar-On was offered a faculty position at Worcester Polytechnic Institute in Massachusetts - one of the first technological universities in the USA, founded in 1865. She has been there ever since and currently serves as director of its Alternative Fuel Economics Laboratory.
“Sustainable energy is definitely an ‘interest thing’ for me,” Bar-On says. “I started working on it before the hubbub - when oil was still around $50/barrel. I wanted to address a system-level issue and learned the methodology at MIT, where I was funded to study solid-oxide fuel cells. Then, through serendipity, my research interests expanded.” “When I looked to teach my first Clean Energy course, I had to think about what this concept really means,” Bar-On recalls. “I enlisted eight faculty from chemical engineering, civil engineering, and technology policy who co-taught the course with me.”
Bar-On hopes that her students here will become more appreciative of the broader issues beyond the technical and technology challenges - an added bonus for the focused Technion student.
Bar-On wanted to return to Israel after working for 25 years in the U.S. on cutting-edge materials engineering problems and was excited to accept the sabbatical position at Technion. In addition to teaching this novel course, she is implementing a mechanical testing program and co-advising a master’s student with Prof. Daniel Rittel. “That’s my day job!” she laughs.
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Last Updated on Monday, 06 April 2009 14:58 |
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Satellite Formation Flight |
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Written by Henk van Esch
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Wednesday, 17 December 2008 14:33 |
Technion Researchers Establish the Only Laboratory in Israel for Development of Satellite Formation Flights in SpaceThis could move Israel closer the establishment of formation flights in orbit around the earth and enable simultaneous operation, with unprecedented quality, of up to four satellites in space for imaging and navigation
Researchers from the Technion’s Faculty of Aerospace Engineering have established the only laboratory of its kind in Israel for the development of satellite formation flights in space. The laboratory includes a facility that was planned in order to develop and test technology and equipment under conditions similar to the actual space environment, including cooperative control, relative position regulation and rotational sensing. The lab’s advance equipment includes a large air table, models of spacecraft and specialized sensors.
“At the beginning of the 21st century, space engineers are facing new challenges – to develop and carry out space missions that are scientifically exciting, publicly engaging, and financially affordable”, says Dr. Pini Gurfil, head of the lab. “We have established this lab in order to cope with these challenges and to promote Israel’s scientific and technological goals in space.”
In the lab, Technion researchers simulate a simultaneous flight of small satellites in space. These satellites cooperate among themselves and can be easily replaced in the event of a failure. The system will replace large, complicated and expensive satellites currently in operation. The satellite models built by the Technion researchers move on an air table and inter-communicate using ZigBee, a short-range broadband, wireless communication protocol.
The Technion researchers believe that thanks to this innovative system, small satellites will be able to carry out simultaneous imaging of every point on the face of the earth – a technology that will significantly improve the quality of images and will enable three-dimensional, realistic pictures. Simultaneous operation of small satellites will also enable local satellite-based navigational services and yield a technology for imaging stars and extra-solar planetary systems for astronomy and space research.
The lab was designed in collaboration with engineers from the Asher Space Research Institute at the Technion and Zickel Engineering. It was built with the financial support of the Technion, the Galileo Supervisory Authority and the Israeli Ministry of Science and Technology. Technion satellites communicate on the air-table:
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Last Updated on Friday, 19 December 2008 10:10 |
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Written by Henk van Esch
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Thursday, 11 December 2008 17:25 |
Researchers at the Technion have become the first to observe the Magnus effect in light
Researchers at the Technion have become the first to observe the Magnus effect in light, potentially opening a new avenue for controlling light in nanometer-scale optical devices. In addition, their experimental discovery provides a more precise way to study important physical behavior that until now could only be observed in relatively complex, messy condensed matter systems. Their work will be published in the December 2008 issue of Nature Photonics.
The research was carried out by Prof. Erez Hasman, Dr. Konstantin Y. Bliokh, Dr. Vladimir Kleiner and Avi Niv from the Micro and Nanooptics Laboratory, Faculty of Mechanical Engineering and Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology.
The Magnus effect can be observed in a wide range of systems. It describes, for example, the sideways force a spinning ball feels as it travels through the air, which explains why a baseball pitcher’s curveball curves, and why a badly hit golf ball slices. Light waves, which are made up of massless particles called photons, have their own version of spin. Light’s spin depends on whether its polarization, or direction of wave vibration, rotates in one direction or in the opposite direction as it travels. The Magnus effect for light (also called the spin Hall effect) causes the light to deflect due to the interaction between the light’s spin and shape of the light’s trajectory.
Prof. Erez Hasman and his collaborators detailed a unified theory of this effect, and also made the first experimental observation of it. The potential extensions of their work are wide ranging. “Utilizing this effect in photonic and nano-optic devices may lead to the development of a promising new area of research- Spinoptics,” says Prof. Hasman. “The hope is that we will be able to control light in all-optical nanometer scale devices in ways that were impossible before.”
They also believe that their ongoing work can provide results that are useful to other fields of physics. According to Prof. Hasman, “There are a number of systems where the spin of a particle couples with its trajectory in high-energy and condensed matter physics. The math is the same in all cases, but experimentally it’s very hard to understand what’s going on. Our experimental system offers a new way to get at some of these fundamental questions clearly and precisely.”
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