| Congressional-Microwave Vacuum Electronics Power Res. Ini.) TWT Coatings Improvement Investigation |
01 FEB 2007 |
25 pages |
| Authors:
L-3 COMMUNICATIONS TORRANCE CA
|
 | Gain stability has long been identified as a key attribute for successful long-term operation of both space and terrestrial helix traveling wave tubes (TWTs), whose mission life may extend to 15 or more years. Gain change associated with attenuator (carbon) thin film resistivity change has been observed for at least 30 years; however no definitive experimental evidence to support the various resistance change theories has been available. Using a modified ... |
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| Comparison of Hearing in Noise Test (HINT) Scores Using Three Different Transducers |
FEB 2007 |
16 pages |
| Authors:
John Ribera; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| Army aircrew in hostile listening environments rely on hearing for crew coordination--a critical component of rotary-wing aviation. New technologies may require aviators to have the ability to not only hear in noise but also to localize warning and other signals. The Hearing in Noise Test (HINT) evaluates functional hearing in noise but has only been normalized using supra-aural headphones. Method: Sixty normal hearing students from Utah State University were equally ... |
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| Evolution of the Department of Defense Millimeter and Microwave Monolithic Integrated Circuit Program |
FEB 2007 |
168 pages |
| Authors:
William C. Pittman; ARMY AVIATION AND MISSILE RESEARCH DEVELOPMENT ENG CTR REDSTONE ARSENA AL APPLIED SENSORS GUIDANCE AND ELECTRONICS DIRECTORATE
|
| The Millimeter and Microwave Monolithic Integrated Circuits (MIMIC) program had its origins in the concern of the smart weapons community for the affordable production of millimeter wave missile seekers, but the broad-based applicability of the technology to radar, communications, countermeasures, and counter-countermeasures was recognized in the formulation of the program. The program was initiated in the turbulent 1980s during the period of high technology trade deficits (and the defense buildup) ... |
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| Classical Method for Deriving the Electromagnetic Propagation Equations for Double Negative Materials With Application for Antenna Design |
FEB 2007 |
28 pages |
| Authors:
Ira Kohlberg; KOHLBERG ASSOCIATES INC RESTON VA
|
| We derive a system of propagation equations in a Double Negative (DN) material in a way that appears to differ from previous derivations although the end result is the same. Our derivation assumes the Poynting vector theorem applies, real materials always have some loss, epsilon(omega) and mu(omega) are obtained from real materials, and wave energy traveling in a specified direction must always be accompanied by a loss of energy in ... |
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| Multilayer Aluminum Oxynitride Capacitors for Higher Energy Density, Wide Temperature Applications (Preprint) |
FEB 2007 |
11 pages |
| Authors:
Kevin R. Bray; Richard L. Wu; Sandra Fries-Carr; Joseph Weimer; K SYSTEMS INC BEAVERCREEK OH
|
| Capacitors are a pervasive technology in every military and commercial application. Increased performance and smaller size in capacitor devices have been the main focus of our research in the development of new dielectrics. A multilayer stacked rigid aluminum oxnynitride (AlaN) capacitor design concept has been developed to improve the energy density and high temperature capability of AlaN capacitors. This method consists of depositing alternating layers of dielectric and metal on ... |
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| A 4-Mbit Non-Volatile Chalcogenide-Random Access Memory Designed for Space Applications (Preprint) |
29 JAN 2007 |
9 pages |
| Authors:
Bin Li; Adam Bumgarner; Daniel Pirkl; James Stobie; Wayne Neiderer; Michael Granziano; Laura Burcin; Thomas Storey; Brian Orlowsky; Kenneth K. Hunt; BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS MANASSAS VA
|
| A 4Mbit non-volatile Chalcogenide-Random Access Memory (C-RAM)(tm) has been designed and fabricated in RH25, a radiation hardened CMOS technology. The top-down design focused on accommodating chalcogenide process variations and satisfying space system specifications. The optimized band-gap circuit supplies reference current and voltage that meet temperature and voltage requirements. The innovative write circuitry supplies appropriate currents (amplitude and shape) to the chalcogenide memory cells to allow them to be programmed either ... |
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| Interface Effects on Magnetism in Model Thin Films |
25 JAN 2007 |
9 pages |
| Authors:
Max G. Lagally; WISCONSIN UNIV-MADISON BOARD OF REGENTS/RESEARCH SPONSORED PROGRAMS
|
| The goals of the research were to explore the fundamental physical mechanisms that allow interfaces between magnetic and nonmagnetic/magnetic and magnetic/vacuum) thin films to influence and control thin-film magnetic properties. We explored the relationship of magnetic properties to nano-scale chemical and physical interface morphologies. Our approach focused on obtaining a quantitative and microscopic description of these interface morphologies, and relating them quantitatively to magnetism. We grew our own films in-situ ... |
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| M1114 -- Golden HMMWV Power: Electrical Systems Used in Theater |
20 JAN 2007 |
4 pages |
| Authors:
Jonathan Aboona; TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| These three briefing charts present a summary of the electrical systems used in the M1114 Golden High Mobility Multipurpose Wheeled Vehicle (HMMWV). Chart 1 pictures a number of the M1114's electrical systems, including the Common Remotely Operated Weapons Station (CROWS), the Improved Target Acquisition Sight (ITAS), the Battery Powered Motorized Turret Unit (BPMTU), the CREW 2 (DUKE) jammer, the Long-Range Acoustic Device (LRAD (trademark)), the Blue Force Tracker (FBCB2), Drivers ... |
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| Electronic Surveillance Modernization Act, as Passed by the House of Representatives |
18 JAN 2007 |
|
| Authors:
Elizabeth B. Bazan; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | After the New York Times reported that the National Security Agency (NSA) was conducting a secret Terrorist Surveillance Program (TSP), a national debate emerged about whether the program was subject to the Foreign Intelligence Surveillance Act (FISA), whether the Administration needed additional authority to continue the program, and how and whether Congress should oversee the program. The TSP involved surveillance without a warrant or court order under FISA of international ... |
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| Few-cycle Optical Parametric Chirped Pulse Amplification |
08 JAN 2007 |
15 pages |
| Authors:
Franz X. Kaertner; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
|
| Over the last few years, ultrafast laser physics and frequency metrology has merged and provided us with unprecedented (sub-cycle) control over the electric field of few-cycle laser pulses emitted from modelocked lasers. These pulses and the corresponding technology are the prerequisite for high energy phase controlled few-cycle laser pulses, needed for reliable extreme ultraviolet (EUV) and soft x-ray production via high harmonic generation. It has been shown over the last ... |
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| Development of an Uncooled Photomechanic Infrared Sensor Based on the IR Organ of the Pyrophilous Jewel Beetle Melanophila Acuminata |
04 JAN 2007 |
77 pages |
| Authors:
Albert P. Pisano; H. Schmitz; Luke Lee; CALIFORNIA UNIV BERKELEY DEPT OF MECHANICAL ENGINEERING
|
| Initial efforts focused on the MEMS materials development effort including deposition and patterning process for chitosan, and more recent work resulted in the development of a photolithography process for chitosan compatible with traditional microfabrication processes. In order to realize a bio-inspired imaging system based on melanophila acuminata, the polysaccharide chitosan (a water-soluble derivative of chitin which can be reacetylated back to chitin through post-processing) was engineered from a commercially available ... |
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| A Control Strategy for High-Performance Macromolecular Materials |
04 JAN 2007 |
9 pages |
| Authors:
M. G. Forest; NONLINEAR CONTROL STRATEGIES INC TUCSON AZ
|
| This contract has led to a design and control capability for high performance, nano-composite materials. Results obtained explicitly link material performance properties to detailed modeling of flow processing. The target materials are nematic polymer nano-composites in which nano-elements are high-aspect-ratio rods or platelets with extreme property contrasts relative to the matrix. Benchmark prototype materials yield striking enhancements in multi-functional properties. A suite of modeling tools for design engineering, which did ... |
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| Dynamic Response of an Insonified Sonar Window Interacting with a Tonpilz Transducer Array |
03 JAN 2007 |
38 pages |
| Authors:
Andrew J. Hull; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
|
| This report derives and evaluates an analytical model of a sonar window in contact with an array of Tonpilz transducers. The window is fully elastic so that all wave components are present in the analysis. The system is insonified with a plane acoustic wave so that the sonar system is operating in an acoustic receive mode. The output of the model is a transfer function of a transducer element output ... |
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| Utilities Privatization in the United States Air Force |
01-Jan-2007 |
161 pages |
| Authors:
David R Scott; MARYLAND UNIV COLLEGE PARK
|
| The Department of Defense (DOD) has roughly 2,600 electric, water, wastewater, and natural gas utility systems valued at an estimated $50 billion. In 1997, DOD decided that privatization was the preferred method for attaining industry standards for utility systems. The Air Force has ownership of 502 of these utility systems. This thesis will provide a background of DOD policy, the Air Force s Utilities Privatization Program and Guidance, findings made ... |
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| The Electronic Structure and Field Effects of an Organic-Based Room Temperature Magnetic Semiconductor |
01-Jan-2007 |
148 pages |
| Authors:
Derek M Lincoln; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| The future of spin-electronics or "spintronics" lies in the development of viable magnetic semiconductors that can effectively operate at room temperature Vanadium tetracyanoethylene (V[TCNE]~2) is a magnetic semiconductor with an ordering temperature well above that of room. Its highly disordered structure has hampered a comprehensive description of the interactions between the V and TCNE sublattices that give rise to its magnetic and electrical properties. We report the results of high-resolution ... |
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| Galileo IOV System Initialization and LCVTT Technique Exploitation |
01-Jan-2007 |
21 pages |
| Authors:
E Detoma; M Gotta; F Gottifredi; S Piazza; D Cretoni; ALCATEL ALENIA SPACE ITALIA S P A ROME (ITALY)
|
| Satellite-based navigation systems uses one-way ranging measurements for system orbit estimation and timekeeping, due to its operational advantage when compared with the two-way ranging technique, in terms of complexity of ground monitoring stations (completely passive and requiring a simple omni-directional antenna to track all the satellites in view). However, a sufficient number of simultaneous independent measurements is required to solve the system unknowns: in particular simultaneous visibility of multiple stations ... |
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| Predictive Computations of Properties of Wide-Gap and Nano-Semiconductors |
JAN 2007 |
67 pages |
| Authors:
Diola Bagayoko; G. L. Zhao; SOUTHERN UNIV AND A AND M COLL BATON ROUGE LA
|
| We report the progress made in the implementation of the afore-mentioned project. To date, we have strictly adhered to the provisions in the proposal relative to the research personnel, materials under study, and the overall research tasks (i.e., computations and theoretical analysis). We have consequently generated new knowledge that is reported in several articles. Twelve (12) articles have already been published, including six (6) in refereed journals and four (4) ... |
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| Performance Assessment: University of Michigan Meta-Material-Backed Patch Antenna |
JAN 2007 |
11 pages |
| Authors:
Robert Dahlstrom; Steve Weiss; ARMY RESEARCH LAB ADELPHI MD
|
| This report describes measurements performed on a meta-material-backed patch antenna designed and fabricated at the University of Michigan for use by CERDEC. The purpose of the measurements was to resolve inconsistencies between the performance measured at these two organizations. The antenna consists of a microstrip patch, with a broad-banding slot, backed by a reactive impedance surface. The gain and impedance characteristics of the meta-material-backed patch antenna were found to be ... |
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| Evaluating Mima-Mac For Dense Urban Environments |
JAN 2007 |
9 pages |
| Authors:
Scott Nettles; TEXAS UNIV AT AUSTIN
|
| This report focuses on a technique, the mitigating interference using multiple antennas MAC (MIMA-MAC), which uses MIMO to solve a critical problem that occurs in multihop wireless networks. We show that applying MIMO to network level problems may result in novel uses of the basic technology. The end result is improved communication, especially in dense urban environments. |
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| Stoichiometry and Characterization of Aluminum Oxynitride Thin Films by Ion-Beam-Assisted Pulsed Laser Deposition (Preprint) |
JAN 2007 |
23 pages |
| Authors:
J. S. Zabinski; J. J. Hu; J. E. Bultman; N. A. Pierce; A. A. Voevodin; DAYTON UNIV OH RESEARCH INST
|
| Oxides are inherently stable in air at elevated temperatures and may serve as wear resistant matrices for solid lubricants. Aluminum oxide is a particularly good candidate for a matrix because it has good diffusion barrier properties and modest hardness. Most thin film deposition techniques that are used to grow alumina require high temperatures to impart crystallinity. Crystalline films are about twice as hard as amorphous ones. Unfortunately, the mechanical properties ... |
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| Ground Experiments of Remote Synchronization for Onboard Crystal Oscillator of Quasi-Zenith Satellites - Use of Multiple Positioning Signals for Feedback Control |
JAN 2007 |
23 pages |
| Authors:
Toshiaki Iwata; Michito Imae; Tomonari Suzuyama; Yoshikatsu Kawasaki; Naoto Takasaki; Kenji Kokubu; Akira Iwasaki; Satoshi Fukushima; Yuji Hashibe; Fabrizio Tappero; NATIONAL INST OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY TSUKUBA IBARAKI (JAPAN)
|
| We have developed a new control method for the quasi-zenith satellite (QZS) remote synchronization system for the onboard crystal oscillator (RESSOX). The new method utilizes L1 and L2 positioning signals of the QZS system. We have proved that precise orbit prediction or estimation of delays such as those caused by the ionosphere and troposphere is not necessary to realize RESSOX technology. L1/L2/Ku-band signal delay caused by the ionosphere and other ... |
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| METAS New Time Scale Generation System - A Progress Report |
JAN 2007 |
13 pages |
| Authors:
Laurent-Guy Bernier; Gregor Dudle; Christian Schlunegger; METAS-SWISS FEDERAL OFFICE OF METROLOGY AND ACCREDITATION BERN-WABERN (SWITZERLAND)
|
| Up to now, UTC (CH) has been defined as a paper time scale which is computed for a single epoch every day: UTC 00:00. In 2006, we have started to phase in the hardware for a new system, still under development, which should allow us to define UTC (CH) as a real time scale generated by a master clock, i.e. a time scale defined for all epochs. The new system ... |
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| Application of Prognostic Health Management in Digital Electronic Systems |
Jan-2007 |
10 pages |
| Authors:
Thomas Dabney; Michael J Roemer; Patrick W Kalgren; Mark Baybutt; Antonio Ginart; Chris Minnella; IMPACT TECHNOLOGIES LLC ROCHESTER NY
|
| Development of robust prognostics for digital electronic system health management will improve device reliability and maintainability for many industries with products ranging from enterprise network servers to military aircraft. Techniques from a variety of disciplines is required to develop an effective, robust, and technically sound health management system for digital electronics. The presented technical approach integrates collaborative diagnostic and prognostic techniques from engineering disciplines including statistical reliability, damage accumulation modeling, ... |
|
| A Molecular Beam Deposition of DNA Nanometer Films |
Jan-2007 |
10 pages |
| Authors:
James G Grote; Andrew J Steckl; Joshua A Hagen; Hans Spaeth; Wei-Xin Li; CINCINNATI UNIV OH NANOELECTRONICS LAB
|
| The development of novel photonic devices which incorporate biological materials is strongly tied to the development of thin film forming processes. Solution-based (wet) processes when used with biomaterials in device fabrication suffer from dissolution of underlying layers, incompatibility with clean environment, inconsistent film properties, etc. We have investigated ultra-high-vacuum molecular beam deposition of surfactant-modified deoxyribonucleic acid (DNA). We have obtained effective deposition rates of 0.1-1 A/s, enabling reproducible and controllable ... |
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| Verification and Optimization of the Physics Parameters of the Onboard Galileo Passive Hydrogen Maser |
Jan-2007 |
15 pages |
| Authors:
Pascal Rochat; Qinghua Wang; Pierre Mosset; Fabien Droz; Giovanni Busca; TEMEX TIME NEUCHATEL (SWITZERLAND)
|
| Atomic clocks represent critical equipment for a satellite navigation system. A Passive Hydrogen Maser (PHM), with its excellent frequency stability performance, has been chosen as the master clock in the Galileo navigation satellite payload, and will be the first one of its type ever to fly. Temex Neuchatel Time is responsible for the industrialization of the Physics Package (PP) of the PHM and has been developing numbers for the PP, ... |
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| Local Bonding Analysis of the Valence and Conduction Band Features of TiO2 |
Jan-2007 |
8 pages |
| Authors:
L Fleming; C C Fulton; G Lucovsky; J E Rowe; M D Ulrich; J Luening; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF PHYSICS
|
| An analysis of the valence and conduction band electronic structure of TiO2 as studied by ultraviolet photoemission spectroscopy UPS and x-ray absorption spectroscopy XAS using synchrotron radiation is reported. Valence band spectra from UPS have been deconvolved using a five-peak model. The spectra are interpreted based on the peak assignments to the XAS data and the symmetries of the valence band states. The interpretation is consistent with theoretical calculations of ... |
|
| Micropackaging for the Next Generation of Optical and Electrical Components |
Jan-2007 |
75 pages |
| Authors:
W S Ring; OPTOELECTRONICS INDUSTRY DEVELOPMENT ASSOCIATION WASHINGTON DC
|
| In August 2006, the Optoelectronics Industry Development Association (OIDA) held a one day forum on micropackaging. OIDA held this Forum in conjunction with the 100 Gbit Ethernet Forum with the objective of focusing on the issues presented by next generation components for communication systems. Historically, the telecommunications sector invested heavily in new communications technology at the component and semiconductor level. Industry stratification over the last 10 to 15 years, however, ... |
|
| AlGaN/GaN HEMTs on Semi-Insulating GaN Substrates by MOCVD and MBE |
Jan-2007 |
11 pages |
| Authors:
Umesh Mishra; CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Silicon (Si) implantation into AIGaN/GaN high electron mobility transistors (HEMTs) has been studied in this program as a method to reduce the sharp increase in the dynamic source resistance at increasing current levels that result in a reduction both in the transconductance gm and the current gain cut-off frequency fT. During the program two different approaches have been investigated to decrease the electric field in the source access region. To ... |
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| Formation of Nanometer-Scale Contacts to Viscoelastic Materials |
2007 |
12 pages |
| Authors:
K. J. Wahl; W. N. Unertl; NAVAL RESEARCH LAB WASHINGTON DC
|
| The making and breaking of nanometer-scale contacts is an essential operation in MEMS devices with moving parts. The behavior of contacts in this size range is not well understood, especially if viscoelastic materials are involved. This article describes shear modulation spectroscopy, a new scanning force microscope technique especially well suited for quantitative studies of nanometer-scale contacts to viscoelastic materials such as lubricants and some polymers. The technique is illustrated by ... |
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| Role of Third Bodies in Friction and Wear |
2007 |
4 pages |
| Authors:
I. L. Singer; K. J. Wahl; NAVAL RESEARCH LAB WASHINGTON DC
|
| Friction is usually treated as a two-body problem, in which the two counterfaces move against each other and a "magical" parameter the friction coefficient comes into being. Not so. At some scale, from atomically thin surface films to chunks of wear particles, third bodies play an important role in friction. These third bodies are often born in the sliding contact and sometimes growing up to be wear particles. They might ... |
|
| Small Depth Quantum Circuits |
2007 |
15 pages |
| Authors:
Debajyoti Bera; Frederic Green; Steven Homer; BOSTON UNIV MA DEPT OF COMPUTER SCIENCE
|
| Small depth quantum circuits have proved to be unexpectedly powerful in comparison to their classical counterparts. We survey some of the recent work on this and present some open problems. |
|
| Fabrication of Highly Ordered Anodic Aluminium Oxide Templates on Silicon Substrates |
2007 |
6 pages |
| Authors:
A. Yin; M. Tzolov; D. Cardimona; L. Guo; J. Xu; BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING
|
| The controlled fabrication of highly ordered anodic aluminium oxide (AAO) templates of unprecedented pore uniformity directly on Si, enabled by new advances on two fronts -- direct and timed anodisation of a high-purity Al film of unprecedented thickness (50 micrometres) on Si, and anodizing a thin but pre-textured Al film on Si, has been reported. To deposit high-quality and ultra-thick Al on a non-compliant substrate, a prerequisite for obtaining highly ... |
|
| Electronics Industry |
2007 |
31 pages |
| Authors:
Michael J. Ginter; James L. Andersen; John A. Becker; Gerald E. Belliveau; Frank J. Eppich; Herman T. Awai; David J. Hanko; Bob Hughes; DOUGLAS JONES; Kelly J. Larson; INDUSTRIAL COLL OF THE ARMED FORCES WASHINGTON DC
|
| This report is an analysis of a critical U.S. sector by the fellows of the Electronics Industry Seminar at the Industrial College of the Armed Forces (ICAF), Class of 2007. The report is the culmination of a focused series of classroom seminar sessions and meetings with industry, government, and academic leaders through field studies in the metropolitan Washington, D.C. area, New York State, Silicon Valley (California), Taiwan, and China. This ... |
|
| Device Demonstration |
31 DEC 2006 |
190 pages |
| Authors:
BAE SYSTEMS ELECTRONICS AND INTEGRATED SOLUTIONS NASHUA NH
|
| The goal of the Defense Advanced Research Projects Agency (DARPA) Advanced Lithography research program was to revolutionize semiconductor lithography through accelerated research of highly innovative approaches that would enable pattern transfer to wafers of features 100 nm and below. To this end, DARPA, via a Broad Agency Announcement, BAA 00-04, solicited proposals for R&D to understand and overcome specific technological obstacles to the realization of lithography for critical dimensions of ... |
|
| Optical Properties of III-V Semiconductor Nanostructures and Quantum Wells |
31 DEC 2006 |
34 pages |
| Authors:
Omar Manasreh; ARKANSAS UNIV FAYETTEVILLE DEPT OF ELECTRICAL ENGINEERING
|
| We have investigated the optoelectronic applications of interband and intersubband transitions in III-V semiconductors quantum wells and quantum dots. The research efforts included the investigation of intersubband transitions in GaN/AlGaN multiple quantum wells for the 1.3 and 1.5 micron spectral ranges. These wavelengths are important for optical communications. Furthermore, we investigated single wall carbon nanotubes for possible use as space-based solar cell. The final report contains detail discussions of the ... |
|
| Quantum Information Processing Using Local Control of Exchange in 1D Nanotubes |
31 DEC 2006 |
20 pages |
| Authors:
Charles M. Marcus; Boris L. Altshuler; Charles M. Lieber; Hongkun Park; HARVARD UNIV CAMBRIDGE MA DEPT OF PHYSICS
|
| The overall project aimed to develop gated nanotubes and nanowires to be used in the development of spin qubits arranged in a 1D array. Nanotube circuits with gate-confined single and double dots were realized, shell-core nanowire growth methods were developed, gated nanowire circuits were fabricated, and double quantum dots, appropriate for singlet-triplet qubits, were investigated experimentally. We also investigated light emission from nanowires, to be of potential use in electron-photon ... |
|
| Efficient THz Source Based on Cascaded Optical Down-Conversion in Orientation-Patterned GaAs Structures |
29 DEC 2006 |
32 pages |
| Authors:
M. M. Fejer; K. Vodopyanov; R. Route; J. Schaar; P. Kuo; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
|
| The goal of this TIFT I-A program was to demonstrate an efficient room temperature source for THz imaging systems based on optical down-conversion in an orientation-patterned GaAs microstructure, incorporated into a resonant cavity, and pumped by a compact solid-state laser. Research was focused on (1) fabrication of quasi-phase-matched (QPM) GaAs microstructures with periodic reversal of crystalline orientation, including orientation-patterned GaAs (OP-GaAs), diffusion-bonded GaAs (DB-GaAs) and optically-contacted GaAs (OC-GaAs), (2) producing ... |
|
| Design, Packaging and Reliability of MEMS S&A Components and Systems |
26 DEC 2006 |
133 pages |
| Authors:
S. B. Park; Baghat Sammakia; James Pitarresi; STATE UNIV OF NEW YORK AT BINGHAMTON
|
| Technology refinements to the packaging process, as well as assuring the highest possible yield of serviceable F/S&A systems, are specifically addressed. The primary objective of this research project is to provide a basic physics based understanding of the behavior and performance of Safe and Arm (S & A) systems. The research covers a broad range of activities ranging from basic materials characterization to overall system level models. The research is ... |
|
| High Density Data Storage Systems by DNA Complexes and Nano-Particles from DNA Hybrid Materials |
20 DEC 2006 |
26 pages |
| Authors:
Naoya Ogata; OGATA RESEARCH LAB HOKKAIDO (JAPAN)
|
| The work focused on: (1) syntheses and characterization of Novel DNA-lipid films derived from alanine, (2) In-situ Intercalation of Phtharocyanine dye (PC) into DNA and Polyamine Complex, (3) syntheses and characterization of Nano-particles derived from DNA-polymer Hybrid Materials Containing Optical Dyes, and (4) demonstration of high density data storage system using DNA complex. |
|
| Semiconductor Device Synthesis |
15 DEC 2006 |
47 pages |
| Authors:
A. F. Levi; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
|
| A systematic approach towards optimal design of optoelectronic semiconductor devices has been developed. The adaptive design of excitonic absorption in broken-symmetry quantum wells has been used as a prototype system with which to explore the device synthesis method. The device model used captured the basic exciton absorption physics but did not include RF design. Electro-absorption modulator designs were investigated experimentally and a modulator with 25 GHz small signal -3 dB ... |
|
| Actuator Trade-Off Analysis for DARPA/BOSS Prototype II |
13 DEC 2006 |
13 pages |
| Authors:
Richard O. Stroman; NAVAL RESEARCH LAB WASHINGTON DC CHEMICAL DYNAMICS AND DIAGNOSTICS BRANCH
|
| The servomotor actuation method used in the first flight prototype zoom lens was chosen because it is simple, small, lightweight, easily available, and can be rapidly integrated into existing UAV systems. Unfortunately, it has proven to be unsatisfactory in several ways. Commanding the servo to positions outside of its displacement-force envelope results in the PID controller "hunting" for the commanded position and burning out the motor. The gearing system linking ... |
|
| Post-Launch Support for DMSP SSIES Sensors |
07 DEC 2006 |
11 pages |
| Authors:
R. A. Heelis; TEXAS UNIV AT DALLAS RICHARDSON
|
| This report summarizes activities related to the support of immediate post-launch activities related to the evaluation of sensor performance for the Special Sensor for Ions, Electrons, and Scintillation (SSIES) that is flown on the the Defense Meteorological Satellite Program (DMSP). The thermal plasma sensors that constitute the SSIES instrument complement provide measurements that describe the composition, velocity, and temperature of the ions and electrons. Each sensor has operational variables that ... |
|
| Q4 Known Goods Substrates Technical Report |
02 DEC 2006 |
10 pages |
| Authors:
Mark Loboda; Eric Carlson; Gilyong Chung; Brian Russell; SEMICONDUCTOR SOLUTIONS LLC MIDLAND MI
|
| The Known Good Substrates (KGS) program is on track technically and financially with program tasks. Q4 wafer fabrication will be completed on time, Q4 metrology and characterization was completed, and Q3 wafers were distributed to partners early in Q4. Many subcontractors are ramping down activities as their work nears completion. A full program review meeting was held in December 2006. |
|
| Numerical Methods for Analysis of Charged Vacancy Diffusion in Dielectric Solids |
DEC 2006 |
40 pages |
| Authors:
John D. Clayton; Peter W. Chung; Michael A. Greenfield; WIlliam D. Nothwang; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| A theory for charged vacancy diffusion in elastic dielectric materials is formulated and implemented numerically in a finite difference code. The governing equations consist of Maxwell's equations of electrostatics coupled with kinetic equations for vacancy diffusion, with the chemical potential accounting for both mixing energy of vacancies and electrostatically-driven charge migration. A second-order accurate implicit scheme is used to solve Maxwell's parabolic equations, while an explicit method is used to ... |
|
| Direct Electric Field Visualization in Semiconductor Planar Structures |
DEC 2006 |
145 pages |
| Authors:
Pavlos Andrikopoulos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A new technique for imaging the 2D transport of free charge in semiconductor structures is used to directly map electric field distributions in operating devices. Direct transport imaging is demonstrated in a scanning electron microscope, using an optical microscope and a high sensitivity charge coupled device. Transport behavior under the combined influence of both diffusion and drift is predicted by modeling the drift and diffusion in 2D following generation at ... |
|
| An Investigation of a Dynamic Sensor Motion Strategy |
DEC 2006 |
15 pages |
| Authors:
Nathan P. Yerrick; David E. Jeffcoat; Abhishek Tiwari; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
|
| This paper considers a dynamic sensor coverage problem in which a single mobile sensor attempts to monitor multiple sites. Sensor motion is modeled using a discrete time, discrete state Markov process. State dynamics at each site are modeled as a linear system. A stochastic simulation is used to demonstrate previously derived theoretical conditions under which a single sensor is or is not sufficient to maintain a bounded estimate of the ... |
|
| Branch Detonation of a Pulse Detonation Engine With Flash Vaporized JP-8 |
DEC 2006 |
99 pages |
| Authors:
John D. Slack; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| Pulse Detonation Engines (PDE) operating on liquid hydrocarbon fuels are limited to operating frequencies of 35 Hz due to long ignition times from a low energy ignition sources. This study shows ignition time of JP-8 can be nearly eliminated by igniting a thrust tube using a secondary detonation. A counter flow heat exchanger attached to a thrust tube utilized waste heat from the detonation process to heat JP-8 to supercritical ... |
|
| Development of High-Temperature, High-Power, High-Efficiency, High-Voltage Converters Using Silicon Carbide (SiC) Delivery Order 0003: SiC High Voltage Converters, N-Type Ohmic Contract Development for SiC Power Devices |
DEC 2006 |
13 pages |
| Authors:
Lin Cheng; Michael S. Mazzola; MISSISSIPPI STATE UNIV MISSISSIPPI STATE CENTER FOR ADVANCED SEMICONDUCTOR PROTOTYPING
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| The durability and reliability of metal-semiconductor contacts are two of the main factors limiting the operational high-temperature limits of SiC electronic devices. To date, nickel (Ni) has been the most widely used metal for ohmic contacts to n-type SiC. The way to make smooth Ni-silicide ? SiC interfaces and silicide top surfaces is important for producing uniformly low contact resistances to achieve device operation at high-current levels without hot spot ... |
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| Implementation of a Fault Tolerant Control Unit within an FPGA for Space Applications |
DEC 2006 |
105 pages |
| Authors:
Gaspar M. Perez Casanova; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The space environment implies a challenge for the development and utilization of electronics. Field Programmable Gate Arrays (FPGAs) represent a possible solution to that challenge. An FPGA itself is not a Fault Tolerant component, but with the correct configuration it can emulate and behave as one. The Configurable Fault Tolerant Processor (CFTP) developed at the Naval Postgraduate School (NPS) was intended to work as a platform for the implementation and ... |
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| Wirelessly Networked Opportunistic Digital Phased Array: System Analysis and Development of a 2.4 GHz Demonstrator |
DEC 2006 |
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| Authors:
Eng C. Yeo; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The concept of a wirelessly networked opportunistic digital phased array radar brings about the added advantages of stealth, enhanced survivability, and maximum maneuverability. The array elements are spread over a wide range of locations on the ship s hull and superstructure, and the Local Oscillator (LO) and data/control signals are wirelessly transmitted to and from a central computer processor, which also performs as the digital beamformer. As part of the ... |
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Electrical and Electronic Equipment
