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education in the areas of mathematics, science, engineering, and technology (MSET) by directly benefiting from the experiences of NASA field centers, affiliated industrial partners and academic institutions. The three basic goals of the program were enhancing core courses in MSET curriculum, upgrading core-engineering laboratories to compliment upgraded MSET curriculum, and conduct research training for undergraduates in MSET disciplines through a sophomore shadow program and through Research Experience for Undergraduates (REU) programs. Since the inception of the program nine courses have been modified to include NASA related topics and research. These courses have impacted over 900 students in the first three years of the program. The Electrical Engineering circuit’s lab is completely re-equipped to include Computer controlled and data acquisition equipment. The Physics lab is upgraded to implement better sensory data acquisition to enhance students understanding of course concepts. In addition a new instrumentation laboratory in the department of Mechanical Engineering is developed. Research training for A&T students was conducted through four different programs: Apprentice program, Developers program, Sophomore Shadow program and Independent Research program. These programs provided opportunities for an average of forty students per semester. Author NASA Programs; Universities; Students; Education; Minorities 20030025706 NASA Langley Research Center, Hampton, VA, USA Membrane Vibration Tests Using Surface-Bonded Piezoelectric Patch Actuation Gasper, James L.; Pappa, Richard S.; February 2003; 13 pp.; In English; 21st International Modal Analysis Conference, 3-6 Feb. 2003, Kissimmee, FL, USA; Original contains black and white illustrations Contract(s)/Grant(s): WU 755-06-00-21 Report No.(s): NASA/TM-2003-212150; L-18261; NAS 1.15:212150; No Copyright; Avail: CASI; A03, Hardcopy This paper describes the status of on-going work at the NASA Langley Research Center to measure the dynamics of thin membranes. The test article is a one-meter square pre-tensioned Kapton membrane that incorporates small surface-bonded piezoelectric patches strategically positioned to excite many modes. It is shown that PVDF (polyvinylidene fluoride) and MFC (macro fiber composite) piezoelectric patch actuators provide adequate excitation energy to obtain modal frequencies and mode shapes. Results from modal tests performed on the membrane using piezoelectric patches of different sizes and positions are discussed. Author Membranes; Vibration Tests; Dynamic Control; Thin Plates; Piezoelectric Actuators; Actuators 20030031369 NASA Goddard Space Flight Center, Greenbelt, MD, USA A Cryogenic, Insulating Suspension System for the High Resolution Airborne Wideband Camera (HAWC)and Submillemeter And Far Infrared Experiment (SAFIRE) Adiabatic Demagnetization Refrigerators (ADRs) Voellmer, George M.; Jackson, Michael L.; Shirron, Peter J.; Tuttle, James G.; [2002]; 8 pp.; In English; SPIE Conference, 21-28 Aug. 2002, Kona, HI, USA; Original contains black and white illustrations; No Copyright; Avail: CASI; A02, Hardcopy The High Resolution Airborne Wideband Camera (HAWC) and the Submillimeter And Far Infrared Experiment (SAFIRE) will use identical Adiabatic Demagnetization Refrigerators (ADR) to cool their detectors to 200mK and 100mK, respectively. In order to minimize thermal loads on the salt pill, a Kevlar suspension system is used to hold it in place. An innovative, kinematic suspension system is presented. The suspension system is unique in that it consists of two parts that can be assembled and tensioned offline, and later bolted onto the salt pill. Author Cryogenics; Insulation; High Resolution; Cameras; Submillimeter Waves; Suspending (Mixing) 32 COMMUNICATIONS AND RADAR Includes radar; radio, wire, and optical communications; land and global communications; communications theory. For related information see also 04 Aircraft Communications and Navigation; and 17 Space Communications, Spacecraft Communications, Command and Tracking; for search and rescue, see 03 Air Transportation and Safety; and 16 Space Transportation and Safety. 20030020930 NASA Glenn Research Center, Cleveland, OH, USA Multi-Beam Phased Array Antennas Lee, R. Q.; Romisch, S.; Popovic, Z.; January 2002; 10 pp.; In English; 2002 Antenna Applications Symposium, 18-20 Sep. 2002, Monticello, IL, USA Contract(s)/Grant(s): NAG3-2587; RTOP 755-08-0B; Copyright; Avail: CASI; A02, Hardcopy 45
Many of NASA’s future missions require multiple accesses to work together as a single system. To accomplish these missions, multi-beam phased array antennas are required to communicate between satellites flying in fixed formation. In this paper, a comparison of different multi-beam systems will be given followed by detailed discussions of the lens array architecture and test results. Author Multibeam Antennas; Phased Arrays; Antenna Design; Lenses; Systems Engineering; Waveguides 33 ELECTRONICS AND ELECTRICAL ENGINEERING Includes development, performance, and maintainability of electrical/electronic devices and components; related test equipment; and microelectronics and integrated circuitry. for related information see also 60 Computer Operations and Hardware; and 76 Solid-State Physics. For communications equipment and devices see 32 Communications and Radar. 20030020881 Computer Sciences Corp., Moffett Field, CA, USA Where is scattering important in nanotransistors? Anantram, M. P.; Svizhenko, A.; February 12, 2003; 3 pp.; In English; American Physical Society Meeting, 1-7 Mar. 2003, Austin, TX, USA Contract(s)/Grant(s): DTTS59-99-D-00437; NASA Order A-61812-D Report No.(s): Rept-1; No Copyright; Avail: CASI; A01, Hardcopy This viewgraph presentation provides an overview of scattering in nanotransistors. Topics covered include: scattering mechanisms, devices used and series resistance. The authors conclude: (1) the influence of electron-photon scattering on the on-current of dual gate MOSFET’s using the non-equilibrium Green’s function method and (2) the influence of the drain extension region can no longer be modeled as a series resistance. CASI Scattering; Metal Oxide Semiconductors; Field Effect Transistors; Nanotechnology 20030022786 Computer Sciences Corp. Intersubband Transitions in InAs/AlSb Quantum Wells Li, J.; Koloklov, K.; Ning, C. Z.; Larraber, D. C.; Khodaparast, G. A.; Kono, J.; Ueda, K.; Nakajima, Y.; Sasa, S.; Inoue, M.; January 20, 2003; 12 pp.; In English; MRS Fall Meeting, 1 Jan, 2003, Boston, MA, USA; Original contains black and white illustrations Contract(s)/Grant(s): DTT559-99-D-00437; No Copyright; Avail: CASI; A03, Hardcopy We have studied intersubband transitions in InAs/AlSb quantum wells experimentally and theoretically. Experimentally, we performed polarization-resolved infrared absorption spectroscopy to measure intersubband absorption peak frequencies and linewidths as functions of temperature (from 4Ktoroom temperature) and quantum well width (from a few nm to 10 nm). To understand experimental results, we performed a self-consistent 8-band k-p band-structure calculation including spatial charge separation. Based on the calculated band structure, we developed a set of density matrix equations to compute TE and TM optical transitions self-consistently, including both interband and intersubband channels. This density matrix formalism is also ideal for the inclusion of various many-body effects, which are known to be important for intersubband transitions. Detailed comparison between experimental data and theoretical simulations is presented. Author Quantum Wells; Matrices (Mathematics); Optical Transition; Band Structure Of Solids; Conduction Bands; Electron Transitions; Mathematical Models; Many Body Problem 20030022789 NASA Ames Research Center, Moffett Field, CA, USA Computer Sciences Corp., USA Spurious States-Free Solution of the k dot p Hamiltonian for Heterostructures Kolokolov, Konstantin I.; Li, Jian-Zhong; Ning, Cun-Zheng; [2003]; 10 pp.; In English; Photonics West 2003, 25-31 Jan. 2003, San Jose, CA, USA Contract(s)/Grant(s): RTOP 704-05-40; No Copyright; Avail: CASI; A02, Hardcopy A method for eliminating spurious solution in the k dot p Hamiltonian has been proposed. Introduction of additional off-diagonal alpha k(exp 2) term converts spurious solution with large real wave vector to evanescent solution with large imaginary wave vector. This modification keeps the same effective masses at Gamma point and introduces negligible deviation 46
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Understanding functional associatio
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cyanobacterial mats, oxygenic photo
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as CIAO/SDP software developers, we
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Exploration Rover (MER) expeditions
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data in guard cells leads to the pr
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71 ACOUSTICS Includes sound generat
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20030025751 NASA Langley Research C
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analyzed using quantum kinetic theo
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Science Through ARts (STAR) is an e
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20030022798 California Inst. of Tec
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mostly at intermediate velocities.
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close to the spacecraft. We then us
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This source had been a bright persi
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the X-ray properties of the cluster
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We revise the physics of primary el
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size of the gullies in relation to
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92 SOLAR PHYSICS Includes solar act
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society, GISS is part of the Earth
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Initial Operation and Checkout of S
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Effect of a BN Interphase that Debo
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Scalability of a Low-Cost Multi-Ter
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DATA TRANSMISSION Reliable Transpor
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Atomic Data for the K-Vacancy State
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FORMATION FLYING A Nonlinear, Six-D
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HIGH TEMPERATURE Alumina Volatility
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Atomic Data for the K-Vacancy State
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MATRICES (MATHEMATICS) A Time Integ
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NASA’s Sentinels Monitoring Weath
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PACIFIC OCEAN Tropospheric Ozone Ov
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PROVING Experimental Verification o
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SACCHAROMYCES Redundancies in Large
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SOLAR CORONA Are CME ‘interaction
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STANDARDS NASA GSFC Mechanical Engi
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TENSILE STRESS Temperature Dependen
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TYPE 3 BURSTS Energetic Particle Pr
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Rayleigh-Taylor Gravity Waves and Q
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Balagadde, Frederick The Electrical
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Casey, Carolyn A. Systems Engineeri
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Gliebe, Philip Recent Progress in E
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Hughes, S. P. Primer Vector Optimiz
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Kirk, C. Laurence Effective Frequen
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Luckring, J. M. Transonic Reynolds
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Naasz, Bo J. Integrated Orbit and A
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Raffaelle, Ryne Future Photovoltaic
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Shirron, Peter J. A Cryogenic, Insu
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Urban and Rural Ozone Collect over
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Xu, Yun-Jun Coupled Attitude and Or
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