| Scalable Video Transmission Over Multi-Rate Multiple Access Channels |
JUN 2007 |
20 pages |
| Authors:
Lisimachos P. Kondi; STATE UNIV OF NEW YORK AT BUFFALO AMHERST RESEARCH FOUNDATION
|
 | This effort demonstrated the interference mitigation capabilities of the auxiliary vector (AV) receiver for video transmission over direct-sequence code division multiple access (DS-CDMA) systems. The proposed receiver design is compared to the conventional RAKE matched-filter (RAKE-MF) and sample-matrix-inversion minimum-variance-distortionless-response (SMI-MVDR) receivers. The DS-CDMA video data stream is transmitted over an RF channel under realistic Rayleigh-faded multipath channel conditions, emulating open and/or urban battlefield environments. |
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| Crossing the Technology Adoption Chasm in the Presence of Network Externalities: Implications for DoD |
JUN 2007 |
127 pages |
| Authors:
Suzanne L. Schang; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis explores factors inhibiting technologies from crossing the technology diffusion "chasm" in between early and wide-scale adoption. It focuses on cost and benefit uncertainty as well as network effects applied to end-users and their organizations. Specifically, it explores Department of Defense (DoD) acquisition programs bringing promising technologies to the field; defines successful technology adoption as realizing its full potential return on investment by achieving the widest potential warfighter use; ... |
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| Boarding Team Communications Phase I: Product Development and Evaluation |
MAY 2007 |
26 pages |
| Authors:
Michael J. Doyal; Brian Khey; Michael Chien; Joan D. Silver; COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT
|
| The U.S. Coast Guard (CG) Research and Development Center has developed Boarding Team Communications (BT COMMS), a wireless ad hoc mesh network solution for the CG Boarding Team below-decks connectivity problem. BT COMMS works where UHF/VHF radios do not and overcomes the problems associated with conventional radio frequency voice repeaters. BT COMMS has proven its capability for providing 100 percent connectivity in critical boarding areas during exercises on a variety ... |
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| Assessment of TEM Cells for Whole Aircraft EMV Testing |
MAY 2007 |
|
| Authors:
Andrew J. Walters; Chris Leat; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) AIR OPERATIONS DIV
|
 | Transverse Electromagnetic (TEM) cells offer one solution to the problem of electromagnetic vulnerability (EMV) testing of whole vehicles at lower frequencies. Combined with a reverberation chamber (RC) TEM cells offer an attractive solution to a EMV testing facility which could operate in the frequency range of 10 kHz to 18 GHz. In order to move toward a hybrid RC/TEM facility the non-uniform transition region between TEM and RC operation (i.e. ... |
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| Wideband Electroabsorption Modulator for Analog Applications |
MAY 2007 |
23 pages |
| Authors:
P. K. Yu; I. Shubin; X. B. Xie; W. S. Chang; CALIFORNIA UNIV SAN DIEGO LA JOLLA
|
| There were two main technical objectives of this program with respect to the investigation of the high speed waveguide electroabsorption (EA) modulator, namely: (1) Design and fabrication of a waveguide modulator with a widened optical waveguide for easy packaging and lower insertion loss, and (2) interfacing with Infotonics for their fiber packaging effort of the modulator. In addition, an examination of the limits to Radio Frequency (RF) link gain, noise ... |
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| Research on Non-Lethal Stunning/Immobilizing Weapons |
APR 2007 |
13 pages |
| Authors:
Gale L. Craviso; Indira Chatterjee; NEVADA UNIV RENO
|
| The overall goal of the research is to lay the foundation for developing non-lethal stunning/immobilizing weaponry based on radiofrequency (RF)/microwave(MW) radiation. Our approach is to identify RF/MW parameters that can selectively, and without producing heating of tissue, alter processes underlying neurotransmitter release and contraction of skeletal muscle. Major accomplishments included 1) completing the design, construction, characterization and testing of a temperature control setup for studying effects of rapid increases in ... |
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| Always On: Achilles Heel of the Networked Force? |
30 MAR 2007 |
21 pages |
| Authors:
Michael T. Barry; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Thoroughly enamored with the benefits of exchanging information in near-real-time, the U.S. military has committed itself to networking the battlefield. Brought about by the convergence of military and consumer communications technology, the networked battlefield boasts continuous connectivity with digitized information. However, the network-centric force is reliant on the radio frequency spectrum to pass information, and is always-on, which is to say, it is constantly producing radio frequency emissions in order ... |
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| Future of Power Efficient Processing (BRIEFING CHARTS) |
07-Mar-2007 |
13 pages |
| Authors:
Michael Fritze; DEFENSE ADVANCED RESEARCH PROJECTS AGENCY ARLINGTON VA MICROSYSTEMS TECHNOLOGY OFFICE
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| Wireless Intrusion Detection |
MAR 2007 |
138 pages |
| Authors:
Albert A. Tomko; Christian J. Rieser; Louis H. Buell; David R. Zaret; William M. Turner; JOHNS HOPKINS UNIV BALTIMORE MD
|
| This report describes a Wireless Intrustion Detection (WIND) system that utilized physical layer features, derived from individual radio frequency packets, to identify network intrustions. The features considered include those intrinsic to the packet source, as well as those related to the propagation path between the source and a network access point. It is shown that the statistics of a set of packet features can be used to fingerprint each packet ... |
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| Shape Memory Polymer Self-Deploying Membrane Reflectors |
30 JAN 2007 |
102 pages |
| Authors:
Stephen D. Vining; CORNERSTONE RESEARCH GROUP INC DAYTON OH
|
| CRG succeeded in developing self-deploying membrane reflector technology to readiness for transition to use in system development by a major spacecraft prime contractor, Ball Aerospace & Technologies Corporation (BATC), and BATC commenced Phase 11 application of the technology. This excerpt of the project Final Report summarizes results Cornerstone Research Group Inc. (CRC) achieved under Air Force Research Laboratory (AFRL) contract FA8650-04-C-2468 for an Air Force Small Business Innovation Research (SBIR) ... |
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| Formation of Primary Amines on Silicon Nitride Surfaces: a Direct, Plasma-Based Pathway to Functionalization |
19 JAN 2007 |
6 pages |
| Authors:
Rory Stine Christina L. /Cole; Kristy M. Ainslie; Shawn P. Mulvaney; Lloyd J. Whitman; NAVAL RESEARCH LAB WASHINGTON DC
|
| Silicon nitride is the most commonly used passivation layer in biosensor applications where electronic components must be interfaced with ionic solutions. Unfortunately, the predominant method for functionalizing silicon nitride surfaces, silane chemistry, suffers from a lack of reproducibility. As an alternative, we have developed a silane-free pathway that allows for the direct functionalization of silicon nitride through the creation of primary amines formed by exposure to a radio frequency glow ... |
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| Future Naval Concepts -- Crew Reductions through Improved Damage Control Communications (FNC-CRIDCC), Triad Test 2 Report (18-22 Sep 2006) |
12 JAN 2007 |
70 pages |
| Authors:
Thomas T. Street; Frederick W. Williams; L. S. Cooper; III Halloway Kenneth E.; Michael Rininger; Charles Miller; Bradley Shirley; Samuel Genovese; Rendell Perry; Kenney McCombs; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
|
| The object of Triad Test 2 was to conduct and document an RF coverage survey of the installed WLAN aboard ex-USS Shadwell in a benign environment, obtain RF WLA data during fire events, and evaluate the ability of the communications equipment to continue to provide a communication capability. The fire events were used to determine the ability of the equipment to provide voice and data communications over Voice over Internet ... |
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| Estimating the Receiver Delay for Ionosphere-Free Code (P3) GPS Time Transfer |
01 JAN 2007 |
7 pages |
| Authors:
Victor Zhang; NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO
|
| The ionosphere-free code (P3) GPS time transfer uses dual-frequency measurements from GPS geodetic receivers to minimize the errors in the ionospheric delay correction. The P3 GPS time transfer requires knowledge of the receiver delays on both the L1 and L2 frequencies (P3 receiver delay). Very few receivers used for P3 GPS time transfer are absolute calibrated, due to the complexity of the calibration. The BIPM has started regular calibration campaigns ... |
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| Semiconductor Device Synthesis |
15 DEC 2006 |
47 pages |
| Authors:
A. F. Levi; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
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| 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 ... |
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| Scalable HAIPE Discovery |
01 DEC 2006 |
30 pages |
| Authors:
Glen Nakamoto; MITRE CORP BEDFORD MA
|
| This paper presents a scalable concept for the dynamic discovery of High Assurance Internet Protocol Encryption (HAIPE) devices situated across multiple striped network segments. The term striped in this context refers to traversing from a red (or classified) network to a black (or unclassified) network to a red network in a multiple concatenated manner (i.e., red-black-red-black-red ...). There are many reasons why network segmentation using IP encryption may occur: use ... |
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| A Cost Benefit Analysis of Radio Frequency Identification (RFID) Implementation at the Naval Postgraduate School's Dudley Knox Library |
DEC 2006 |
65 pages |
| Authors:
Joel D. Tiu; Shawn S. Bahk; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this MBA project is to evaluate the potential of implementing Radio Frequency Identification (RFID) technology at the Naval Postgraduate School's Dudley Knox Library (DKL). DKL is an academic library supporting a graduate student population only. This study has both quantitative and qualitative analyses. A Cost Benefit Analysis (CBA) was conducted using data gathered from research which included personal interviews, site visits, and a survey questionnaire. Time and ... |
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| Seeking Radio Emissions from Hypervelocity Micrometeoroid Impacts: Early Experimental Results from the Ground |
15 NOV 2006 |
8 pages |
| Authors:
M. J. Starks; D. L. Cooke; B. K. Dichter; L. C. Chhabildas; W. D. Reinhart; III Thornhill T. F.; AIR FORCE RESEARCH LAB HANSCOM AFB MA
|
| High-velocity impact experiments have been conducted to look for radio frequency (RF) emissions from impact-produced plasmas that could be used to identify micrometeoroid impacts to spacecraft in orbit. Launched by a three-stage light gas gun, 17 mm diameter by 0.9 mm thick Ti6Al-4V flyer plates impacted 0.75 mm thick indium (In) foil at more than 10 km s(-1). The resulting collision presumably ionized some fraction of the vaporized in cloud, ... |
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| Distributed Beam Former for Distributed-Aperture Electronically Steered Antennas |
NOV 2006 |
9 pages |
| Authors:
Amir I. Zaghloul; Ozlem Kilic; VIRGINIA RESEARCH INST INC ARLINGTON
|
| Applications for electronically steered arrays (ESA) in army communication systems span frequencies from UHF to Ka bands and requirements that include single and multiple beams, various scanning speeds, and different polarizations. The radiating apertures can be planar, conformal or segmented and distributed over multi-faceted structures. Examples include distributed apertures on military vehicles, antennas on elevated posts or towers on stationary or mobile platforms, and others. The beam former is an ... |
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| Advanced Image Processing Techniques for Maximum Information Recovery |
NOV 2006 |
72 pages |
| Authors:
James E. Cross; Jiecai Luo; SOUTHERN UNIV BATON ROUGE LA OFFICE OF SPONSORED PROGRAMS
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| The objective of this project was to investigate methods to recover the maximum amount of available information from an image. Some radio frequency and optical sensors collect large-scale sets of spatial imagery data whose content is often obscured by fog, clouds, foliage and other intervening structures. Often, the obstruction is such as to render unreliable the definition of underlying images. Various mathematical operations used in image processing to remove obstructions ... |
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| A Predictive Model for Cognitive Radio |
14 SEP 2006 |
8 pages |
| Authors:
Troy B. Weingart; COLORADO UNIV AT BOULDER DEPT OF COMPUTER SCIENCE
|
| Advances in process technology, manufacturing, and architecture have ushered in an age of faster; smaller,; and cheaper electronic devices. Emerging processor technology has made it possible to migrate applications that were traditionally implemented in custom silicon to general purpose processors (GPP). in the area of wireless communication, this transition has given birth to the field of software-defined and cognitive radio. These/smart radios, or Cognitive/Software-defined Radios (C/SDR), can potentially make more ... |
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| Impact of Radio Frequency Identification (RFID) on the Marine Corps' Supply Process |
SEP 2006 |
106 pages |
| Authors:
Melissa D. Chestnut; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this research is to determine the impacts of utilizing radio frequency identification (RFID) technology in order to implement intransit visibility (ITV) into the Marine Corps Supply Process. I interviewed experts and users of the LTMITV/W2W at the Supply Management Unit (SMU), 1st Combat Logistics Regiment, 1st Marine Logistics Group on the operational implementation of the system as well as benefits and opportunities for improvement. With the information ... |
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| Effects of Multiple Scattering on the Implementation of an Underwater Wireless Optical Communications Link |
Sep-2006 |
7 pages |
| Authors:
Alan Laux; Brandon Cochenour; Linda Mullen; Tom Curran; NAVAL AIR SYSTEMS COMMAND PATUXENT RIVER MD
|
| Recent interest in ocean exploration has brought about a desire for developing wireless communication techniques in this challenging environment. Due to its high attenuation in water, a radio frequency (RF) carrier is not the optimum choice. Acoustic techniques have made tremendous progress in establishing wireless underwater links, but they are ultimately limited in bandwidth. A third option is optical radiation, which is discussed in this paper. One drawback of underwater ... |
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| Strong Optical Injection Locking of Edge-Emitting Lasers and Its Applications |
18 AUG 2006 |
158 pages |
| Authors:
Hyuk-Kee Sung; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| Semiconductor lasers are essential components that enable high-speed long-haul communication and have been widely used for various applications in photonics technology. Semiconductor lasers under optical injection locking exhibit superior performance over free-running lasers and provide useful applications not achievable through the free-running lasers. The performance of injection-locked lasers has been found to be significantly improved with stronger injection. In this dissertation, the characteristics and applications of semiconductor lasers under strong ... |
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| CW Atom Laser |
04 AUG 2006 |
10 pages |
| Authors:
G. Raithel; MICHIGAN UNIV ANN ARBOR
|
| A continuous-wave (cw), phase- and amplitude-stable atom laser based on magnetic guiding, magnetic compression, and continuous distributed evaporative cooling has been pursued. The continuous operation of a cold atomic beam in a high-gradient (up to 2.7kG/cm) magnetic guide of 1.7m length has been demonstrated. An imaging method has been developed that allows in-situ measurements of atom temperatures and fluxes. The atomic beam in the high-gradient portion of the guide has ... |
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| Radiation and Scattering Compact Antenna Laboratory |
AUG 2006 |
21 pages |
| Authors:
Joshua Radcliffe; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
|
| In-house applied RF aperture development in the RASCAL laboratory. This interim report contains research centered on leaky wave antenna technology and wideband spiral antenna interferometry. Novel, thin profile, wideband apertures (leaky wave phenomena) have a bright future amongst small vehicle installation. Robust modeling, fabrication, and in-house measurement have led to unique breakthroughs in bandwidth, high efficiency, and end termination schemes. Wideband spiral antenna interferometry has been a new area of ... |
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| Radar Cross-Section (RCS) Measurements of a Dismount With Rocket-Propelled Grenade (RPG) Launcher at Ka-Band |
JUL 2006 |
56 pages |
| Authors:
Suzanne R. Stratton; Robert L. Bender; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The U.S. Army Research Laboratory's (ARL's) Radio Frequency and Electronics Division sponsored and conducted a series of measurements to characterize the millimeter wave (MMW) signatures of one Soldier carrying a rocket-propelled grenade (RPG) launcher with grenade at 34 GHz over three depression angles and for three different body postures: prone, kneeling, and standing. The measurements were taken by ARL at its outdoor signature research facility at Aberdeen Proving Ground, MD, ... |
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| A Method for Dynamic Configuration of a Cognitive Radio |
JUL 2006 |
7 pages |
| Authors:
Troy B. Weingart; Douglas C. Sicker; Dirk Grunwald; COLORADO UNIV AT BOULDER DEPT OF COMPUTER SCIENCE
|
| Cognitive radios offer a broad range of opportunities for improving the me and utilization of radio frequency spectrum, they also offer a host of exciting prospects in networking research. This includes the creation of radio networks that can reconfigure their operation based on application requirements, policy updates and environmental conditions. Such reconfiguration requires an understanding of cross-layer interactions within the network protocol stack. It also requires the development of algorithms ... |
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| Devices and Control Strategies for AD HOC Optical Communications Networks |
26 JUN 2006 |
11 pages |
| Authors:
John Baillieul; Thomas Bifano; BOSTON UNIV MA DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
|
| The research under this project has been aimed at proving the potential value of key elements (both hardware and operational concepts) that we plan to develop in initiating an ambitious program of research to develop a radical new technology for high-bandwidth, stealthy communication over free-space optical links. The results of the project have been several prototype systems which integrate optical components (a MEMS-based spatial light modulator (SLM) integrated with a ... |
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| Joint Entropy Minimization for Learning in Nonparametric Framework |
09 JUN 2006 |
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| Authors:
Parvez Ahammad; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| Characterisation of Narrowband HF Channels in the Mid and Low Latitude Ionosphere |
01 JUN 2006 |
|
| Authors:
T. J. Harris; M. L. Scholz; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)
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| The performance of an HF digital radio system is strongly affected by the response of its various protocols to short-term (sub-hourly) variations in the ionosphere. There is a very limited choice of models of this variation. Channel simulators based on the Watterson 2-path model (ITU-R F.1487) are commonly relied upon for modem testing, system design and modelling. Limited DSTO trials in the past have cast doubt on the validity of ... |
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| Dispersion Based Photonic-Crystal Structures for RF Applications |
JUN 2006 |
40 pages |
| Authors:
Dennis W. Prather; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This work provides a framework for establishing dielectric-based naval communication systems, which are more secure and more efficient, compared to current metallic counterparts. Herein are demonstrated applications of RE PhCs in improving the performance of naval communication systems and decreasing scattering cross-section of naval vessels. Dielectric devices were designed, fabricated, and characterized based on the unique dispersion properties of PhCs to achieve confinement, waveguiding, radiation, and filtering in the microwave ... |
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| RFID Meets GWOT: Considering a New Technology for a New Kind of War |
JUN 2006 |
71 pages |
| Authors:
Kevin L. Kirby; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this thesis is to provide insight into the potential benefits that Radio Frequency Identification (RFID) technology may provide USSOCOM and other commands in the Global War on Terror. This thesis will explain the basic concept behind RFID, and cite some of the current day applications of today that are revolutionizing the civilian sector. More importantly, this thesis will introduce conceptual security applications that could benefit USSOCOM today, ... |
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| Tactical Digital Information Link-Technical Advice and Lexicon for Enabling Simulation (TADIL-TALES) II: Link 11/11B |
JUN 2006 |
|
| Authors:
Joe Sorroche; Rob Byers; Neil Barrett; ASRC COMMUNICATION LTD KIRTLAND AFB NM DISTRIBUTED MISSION OPERATIONS CENTER
|
| Link 11/11B, otherwise known as TADIL A and TADIL B, has been used by U.S. Services and NATO nations for many years. However, the NATO Standard Agreement (STANAG) 5602 Standard Interface for Multiple Platform Link Evaluation (SIMPLE) does not fully describe the radio frequency network environment, which is required to model a more robust Link 11/11B operation. In addition, the IEEE 1278.1a standard does not provide a way to model ... |
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| Effect of Electron Detachment on the Wall Potential and Plasma Evolution in the Afterglow Stage |
JUN 2006 |
5 pages |
| Authors:
E. A. Bogdanov; Jr. DeJoseph C. A.; V. I. Demidov; A. A. Kudryavtsev; SAINT PETERSBURG STATE UNIV (RUSSIA)
|
| It is demonstrated that detachment of electrons in the afterglow of an electronegative plasma can lead to a significant increase in negative wall potential with respect to the plasma potential. This effect can be used to modify the near-wall sheath electric field and thickness, which are important for plasma processing applications. Also in the afterglow, this effect can lead to an increase in electron density with time, and a reduction ... |
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| Crisis Management- Operational Logistics & Asset Visibility Technologies |
JUN 2006 |
61 pages |
| Authors:
Richard A. Braunbeck; Michael F. Mastria; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this MBA Project was to identify and explore logistical frameworks that leverage technology to overcome problems associated with coordinated logistics operations during crisis management. Over the past ten years, there have been significant advances in RFID, satellite and other related asset visibility technologies. These advances are mature enough to significantly increase the probability of achieving a useful common operational picture during emergency response activities. Recent crisis response ... |
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| Modularly Integrated MEMS Technology |
23 MAY 2006 |
183 pages |
| Authors:
Marie-Angie N. Eyoum; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| Process design, development and integration to fabricate reliable MEMS devices on top of VLSI-CMOS electronics without damaging the underlying circuitry have been investigated throughout this dissertation. Experimental and theoretical results that utilize two ?Post-CMOS? integration approaches will be presented. The first integration approach uses SiGe MEMS technology for the ?Post-CMOS? monolithic integration of the MEMS devices with electronics. Interconnects between SiGe MEMS and Al-TiN metallized layers have been characterized and ... |
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| Implementation of a Localization System for Sensor Networks |
18 MAY 2006 |
175 pages |
| Authors:
Tufan C. Karalar; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| Localization is very important for self-configuring wireless sensor networks. There are two main tasks to performing localization. Assuming availability of reference points, first the relationships to the reference points are established; in this thesis this relationship is the distance to the reference point. Second, using the reference point positions and the relations to these points, an algorithmic computation is carried out to compute the position. In the existing body of ... |
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| Analysis and Evaluation of the Reconfigured Exponential Troposphere Model (ETM) |
10 MAY 2006 |
138 pages |
| Authors:
Junho Choi; James Connor; NAVAL RESEARCH LAB WASHINGTON DC EFFECTIVENESS OF NAVY ELECTRONIC WARFARE SYSTEMS
|
| This report presents a comprehensive analysis and evaluation of the current troposphere database and processing algorithm for eight regional areas (United States, Europe, Middle East, Southeast Asia, Northeast Asia, Amazon Rain Forest, Sahara Desert, and Australia). Software quality evaluation on all troposphere-related programs has been performed by adopting a Cyclomatic Complexity Metrics tool by NIST standard 500-235 issued in September 1995. This report contains a reprogrammed and refined weather database ... |
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| Supplementing an AD-HOC Wireless Network Routing Protocol with Radio Frequency Identification (RFID) Tags |
MAY 2006 |
91 pages |
| Authors:
LeRoy S. Willemsen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Wireless sensor networks (WSNs) have a broad and varied range of applications, yet all of these are limited by the resources available to the sensor nodes that make up the WSN. The most significant resource is energy. A WSN may be deployed to an inhospitable or unreachable area, leaving it with a non-replenishable power source. This research examines a way of reducing energy consumption by augmenting the nodes with radio ... |
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| Very Low NF, High DR Heterodyne RF Lightwave Links Using a Simple, Versatile Photonic Integration Technology |
MAY 2006 |
175 pages |
| Authors:
Stephen R. Forrest; PRINCETON UNIV NJ SCHOOL OF ENGINEERING AND APPLIED SCIENCE
|
| The program goals were to demonstrate ultra-low noise RF links, and to demonstrate several key integrated optoelectronic components employing a versatile asymmetric twin waveguide technology. All objectives set forth in the proposal were either met or exceeded. These achievements included: Demonstration of a versatile integration technology based on the asymmetric twin waveguide platform that allowed for the realization of a broad range of components useful in RF photonic components. This ... |
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| Laser Initiation and Radiofrequency Sustainment of Seeded Air Plasmas |
APR 2006 |
49 pages |
| Authors:
J. E. Scharer; WISCONSIN UNIV-MADISON DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We have carried out research on high density [10(exp 11) - 4 x 10(exp 13)], large volume (500-2500 cc), high-pressure (20-760 Torr), laser initiated plasma produced in nitrogen, argon and air. The low ionization energy organic gas (TMAE) laser-initiated see plasmas create an initial condition that is used for plasma sustainment at much lower radiofrequency (RF) power levels (0.4 - 3 W/cc) than is the case for RF initiation alone. ... |
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| Selected Issues in DoD's Radio Frequency Identification (RFID) Implementation |
APR 2006 |
|
| Authors:
Christine Youngblut; Sarah H. Nash; Michael S. Nash; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA
|
| This report describes the full scope of the Department of Defense (DoD) Radio Frequency Identification (RFID) activities with the purpose of identifying RFID-related issues specific to the Defense Logistics Agency (DLA). It summarizes DoD Components' status in implementing DoD RFID policy requirements, new DoD uses of active RFID, and progress in the use of passive RFID in the DoD supply chain. The report also addresses relevant standards and RFID training ... |
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| Structural Health Monitoring of an Aircraft Panel Using Continuous AE Sensor (Preprint) |
APR 2006 |
|
| Authors:
Mannur J. Sundaresan; Gangadhararao Grandhi; Francis Nkruman; NORTH CAROLINA AGRICULTURE AND TECHNICAL STATE UNIV GREENSBORO DEPT OF MECHANICAL AND CHEMICAL ENGINEERING
|
| Fatigue crack growth during the service of aging aircrafts has become an important issue and the monitoring of such cracks in hot spots is desirable. A structural health monitoring sensor system that uses acoustic emission technique for monitoring safety of such structures is described in this report. A "continuous sensor" formed by connecting multiple sensor nodes in series arrangement to form a single channel sensor is proposed to monitor acoustic ... |
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| Space Weather Effects on RF Propagation |
15 MAR 2006 |
14 pages |
| Authors:
Antonio M. Casimiro; UNIVERSITY OF ALGARVE FARO (PORTUGAL)
|
| This report results from a contract tasking University of Algarve as follows: The Grantee will 1) apply Maxwell's equations with vector radiation processing to determine how virtual antennas can be developed using the Huygens principle; 2) study the propagation medium to determine which physical parameters are important for radiation parameters of the spatial distributions of radiating sources and to establish the relationships among them. The aspects of the propagation medium ... |
|
| Analysis of Photoconductive Properties in Ge2Sb2Te5 (GST) Chalcogenide Films for Applications in Novel Electronics |
MAR 2006 |
141 pages |
| Authors:
John R. Chezem; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis investigated the thermal phase-change properties in Ge(sub 2)Sb(sub 2)Te(sub 5) (GST) chalcogenide-based films and determined the feasibility of coupling the GST with photosensitive DNA material for novel optical device applications. Modeling and testing of GST were researched with the approach that GST would react as a resistive mechanism through thermal manipulation. A test structure was fabricated with a 2-micronmeter MEMS fabrication process. GST material was deposited (by RF ... |
|
| A Transient Spice Model for Dielectric-Charging Effects in RF Mems Capacitive Switches (Preprint) |
MAR 2006 |
12 pages |
| Authors:
Xiaobin Yuan; James C. Hwang; David I. Forehand; Charles L. Goldsmith; MEMTRONICS PLANO TX
|
| A transient SPICE model for dielectric-charging effects in RF MEMS capacitive switches was developed and implemented in a popular microwave circuit simulator. In this implementation the dielectric-charging effects are represented by RC sub-circuits with the sub-circuit parameters extracted from directly measured charging and discharging currents in the pA range. The resulted model was used to simulate the actuation-voltage shift in RF MEMS capacitive switches due to repeated operation and charging ... |
|
| Acceleration of Dielectric Charging in RF MEMS Capacitive Switches (Preprint) |
MAR 2006 |
10 pages |
| Authors:
Xiaobin Yuan; James C. Hwang; David I. Forehand; Charles L. Goldsmith; MEMTRONICS PLANO TX
|
| To design and validate accelerated life tests of RF MEMS capacitive switches, acceleration factors of charging effects in switch dielectric were quantitatively characterized. From the measured charging and discharging transient currents at different temperatures and control voltages, densities and time constants of dielectric traps were extracted. A charging model was constructed to predict the amount of charge injected into the dielectric and the corresponding shift in actuation voltage under different ... |
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| Marine Mammal Detection: Call-Up Against the Noise Monitoring Standing Offer |
MAR 2006 |
|
| Authors:
Brad Glessing; Joe Hood; DEFENCE RESEARCH AND DEVELOPMENT ATLANTIC DARTMOUTH (CANADA)
|
| This report documents the work done to prototype a marine mammal detection system. The resulting system will support environmental mitigation measures prior to, and during, active sonar trials and exercises. A working application was delivered at the end of the call-up that allows a user to configure and run detection processing, with live updates provided, or to post-analyze data from a previous detection run. Once selected, an image of the ... |
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| Report of the IEEE ICES/COST 281 Thermal Physiology Workshop Held in Paris, France on September 22-24, 2004 |
27 FEB 2006 |
|
| Authors:
Eleanor R. Adair; INERIS VERNEUIL EN HALATTE (FRANCE) PARC TECHNOLOGIQUE ALATA-BP2
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| The Final Proceedings for ICES/COST 281 Thermal Physiology Workshop, 22 September 2004 - 25 September 2004. The goal of the workshop is to develop appropriate techniques for predicting the thermophysiological responses of humans who are exposed to RF/MW fields at specific frequencies, field strengths, and dosimetry, both experimental and theoretical. We will validate modeling predictions with existing human exposure data. Topics include: Environmental physiology under heat stress (whole body and ... |
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| Mixed-Signal Electronics Technology for Space (MSETS) |
16 FEB 2006 |
202 pages |
| Authors:
John Ringo; WASHINGTON STATE UNIV PULLMAN
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| The purpose of this project was to stimulate development of analog and mixed-signal electronics technology for communications and other missions in space. The research was conducted by the Center for Design of Analog-Digital Integrated Circuits (CDADIC), headquarters at Washington State University, and consisting of multiple universities and industry partners. To accomplish the research goal, 14 projects were conducted by CDADIC university-industry teams in six major technical areas, as identified by ... |
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