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3rd International IEEE/EMBS Conference on Neural engineering

作者： Sodagar, Amir M. Perlin, Gayatri E. Yao, Ying Najafi, Khalil Wise, Kensall D. K. N. Toosi University of Technology Engineering Research Center for Wireless Integrated MicroSystems (WIMS ERC) University of Michigan Ann Arbor MI 48109 United States WIMS ERC Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109 United States

ISBN: (纸本)9781424407910

This paper presents initial neural recording results with a 64-channel wireless cortical microsystem. The system can be programmed and powered using an inductive telemetry link, switching an RF carrier between 4 and 8MHz to enter command information. Recorded neural activity is returned to the external world wirelessly over an on-off-keyed 80MHz carrier. The system can be programmed to detect positive, negative, and biphasic spikes on all the channels simultaneously or can monitor one channel with 8 bits of resolution. It has recorded single units from guinea pig auditory cortex over periods of 30 days.

关键词： Neurology

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Single-mode surface-emitting terahertz quantum-cascade lasers operating up to ∼ 150 K

Single-mode surface-emitting terahertz quantum-cascade laser...

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Conference on Lasers and Electro-Optics, 2007, CLEO 2007

作者： Kumar, Sushil Benjamin, S. Williams Qin, Qi Lee, Alan W.M. Hu, Qing Reno, John L. Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 United States Sandia National Laboratories Center of Integrated MS 1303 Albuquerque NM 87185-1303 United States

We report robust single-mode operation of surface-emitting distributed-feedback terahertz quantum-cascade lasers in metal-metal waveguides. Grating devices span a range of 0.35THz around 2.9THz, with 149K maximum puls... 详细信息

ISBN: (纸本)9781557528346

关键词： Quantum cascade lasers

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Single-mode surface-emitting terahertz quantum-cascade lasers operating up to » 150 k

Single-mode surface-emitting terahertz quantum-cascade laser...

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Quantum Electronics and Laser science Conference, QELS 2007

作者： Kumar, Sushil Williams, Benjamin S. Qin, Qi Lee, Alan W. M. Hu, Qing Reno, John L. Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 United States Sandia National Laboratories Center of Integrated Nanotechnologies MS 1303 Albuquerque NM 87185-1303 United States

ISBN: (纸本)1557528349

关键词： Quantum cascade lasers

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Single-mode surface-emitting terahertz quantum-cascade lasers operating up to » 150 K

Single-mode surface-emitting terahertz quantum-cascade laser...

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Photonic Applications Systems Technologies Conference, PhAST 2007

ISBN: (纸本)1557528349

关键词： Quantum cascade lasers

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Remote sensing information visualization using volume based objects in world wind

Remote sensing information visualization using volume based ...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Tobias Spies Robert Moorhead Manfred Brill Electrical and Computer Engineering Department and GeoResources Institute Mississippi State University MS USA Computer Science and Microsystems Technology Department University of Applied Sciences Kaiserslautern Zweibrucken Germany

Visualization of remotely-sensed meteorological data has traditionally consisted of two dimensional maps. However, the technological advancements in recent years have allowed data to be collected in new and unique ways and with greatly increased range and density. In particular, data are now collected at discrete locations within a volume, as opposed to points on a surface. The data volume, as opposed to an image, necessitates a different form of visualization. Unlike common techniques that stick on two dimensional maps, the main focus for the new techniques is showing the precipitation and other meteorological data in a more intuitive manner. This paper will introduce one of several possible ways to visualize a volume dataset. In this particular case rain intensity values gathered by NASA's TRMM satellite deliver a stereotypic volume dataset.

关键词： Remote sensing Data visualization Meteorology Spaceborne radar Extraterrestrial measurements Position measurement NASA Wrapping computer graphics Focusing

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Real-Time, Transmission-Mode, Terahertz Imaging Over a 25-meter Distance

Real-Time, Transmission-Mode, Terahertz Imaging Over a 25-me...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Alan Wei Min Lee Qi Qin Sushil Kumar Benjamin S Williams Qing Hu John L Reno Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge Massachusetts 02139. awmlee@mit.edu Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts Sandia National Laboratories Center of Integrated Nanotechnologies New Mexico MS

We demonstrate transmission-mode imaging over a 25 meter distance using a ~4.9- THz quantum-cascade laser, frequency-optimized for a low-loss (-0.5 dB/m) atmospheric window. The ~17-mW peak power allows real-time imag... 详细信息

ISBN: (纸本)1557528349

关键词： Optical imaging Frequency Quantum cascade lasers Mirrors Cameras laboratories Drugs Explosives Atmospheric waves Stimulated emission

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Enhanced Ductile Behavior of Tensile-Elongated Individual Double-Walled and Triple-Walled Carbon Nanotubes at High Temperatures

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Physical Review Letters 2007年第18期98卷 185501-185501页

作者： J. Y. Huang S. Chen Z. F. Ren Z. Wang K. Kempa M. J. Naughton G. Chen M. S. Dresselhaus Department of Physics Boston College Chestnut Hill Massachusetts 02467 USA Center for Integrated Nanotechnologies (CINT) Sandia National Laboratories Albuquerque New Mexico 87185 USA Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics and Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA

We report exceptional ductile behavior in individual double-walled and triple-walled carbon nanotubes at temperatures above 2000 °C, with tensile elongation of 190% and diameter reduction of 90%, during in situ tensile-loading experiments conducted inside a high-resolution transmission electron microscope. Concurrent atomic-scale microstructure observations reveal that the superelongation is attributed to a high temperature creep deformation mechanism mediated by atom or vacancy diffusion, dislocation climb, and kink motion at high temperatures. The superelongation in double-walled and triple-walled carbon nanotubes, the creep deformation mechanism, and dislocation climb in carbon nanotubes are reported here for the first time.

关键词： .dislocation tensile vacancy high temperatures Ductile creep Kink climb double-walled Huang Chen superelongation

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High-Power Metal-Metal Waveguide Terahertz Quantum-Cascade Laser with a Hyperhemispherical Lens

High-Power Metal-Metal Waveguide Terahertz Quantum-Cascade L...

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Conference on Lasers and Electro-Optics (CLEO)

We demonstrate an ~85 mW (pulsed, 5 K), metal-metal waveguide, terahertz quantum- cascade laser using an optically coupled lens. The device has a FWHM of ~6 Deg. and a maximum pulsed operating temperature of 155 K.

ISBN: (纸本)1557528349

关键词： Waveguide lasers Lenses Optical waveguides Quantum cascade lasers Temperature Silicon Optical pulses Surface emitting lasers Reflectivity laboratories

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Single-Mode Surface-Emitting Terahertz Quantum-Cascade Lasers Operating up to ~ 150 K

Single-Mode Surface-Emitting Terahertz Quantum-Cascade Laser...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Sushil Kumar Benjamin S. Williams Qi Qin Alan W. M. Lee Qing Hu John L. Reno Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA USA Center of Integrated Nanotechnologies Sandia National Laboratories Albuquerque NM USA

ISBN: (纸本)1557528349

关键词： Surface emitting lasers Optical waveguides Gratings Quantum cascade lasers Waveguide lasers Laser beams Surface waves Optical surface waves Laser modes Power generation

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A Novel anti-reflecton coated FP laser amplifier for 2.5Gbit/s DWDM-PON transmission

A Novel anti-reflecton coated FP laser amplifier for 2.5Gbit...

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Photonic Applications Systems Technologies Conference, PhAST 2007

作者： Liao, Yu-Sheng Chen, Yung-Jui Huang, Yin-Hsun Wang, Hai-Lin Ko, Sun-Chien Lin, Gong-Cheng Lin, Gong-Ru Department of Photonics and Institute of Electro-Optical Engineering National Chiao Tung University 1001 Ta Hsueh Road Hsinchu 300 Taiwan Department of Computer Science and Electrical Engineering University of Maryland Baltimore County 1000 Hilltop Circle Baltimore MD 21250 Maryland United States Telecommunication Laboratories Advanced Technology Laboratory 12 Lane 551 Min-Tsu Road Sec.5 Yang-Mei Taoyuan Taiwan Graduate Institute of Electro-Optical Engineering Department of Electrical Engineering National Taiwan University No.1 Sec. 4 Roosevelt Road Taipei 106 Taiwan

A novel anti-reflection coated Fabry-Perot laser amplifier under side-mode injection-locking for 2.5Gbit/s DWDM-PON is demonstrated with SMSR >35dB, Q-factor 9.2, locking range of 30nm, power penalty of -0.7dB, and... 详细信息

ISBN: (纸本)1557528349

关键词： Passive optical networks

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