| Evolution of a Graphical User Interface for the Rapid Prototyping of Real-Time Embedded Systems |
SEP 1997 |
452 pages |
| Authors:
Kenneth B. Moeller; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
 | The Computer-Aided Prototyping System (CAPS) is an integrated collection of software tools that support the development of software systems utilizing the prototype paradigm. Central to CAPS is the Prototype System Description Language (PSDL). The PSDL Editor supplied in CAPS Release 1 provided a unique combination of a graphical interface for editing PSDL data flow diagrams and an attribute-grammar based text editor to enforce syntactically correct ... |
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| Improved Undersea Towing Cable |
26 AUG 1997 |
|
| Authors:
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | During the course of development work several specific tasks that would be necessary to successfully fabricate a cable with embedded sensors were identified. The exercise of building a prototype cable would provide the opportunity to assess the feasibility of accomplishing these tasks. |
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| Instrumentation for the Measurement and Modeling of Micropatch Antennas Controlled with Embedded Impedance Elements |
31 JUL 97 |
15 pages |
| Authors:
Michael H. Thursby; FLORIDA INST OF TECH MELBOURNE DEPT OFELECTRICAL AND COMPUTER ENGINEERING
|
| This grant provided the equipment necessary to upgrade the Antenna Systems Laboratory(ASL) thus enhancing our measurement, analysis and simulation capabilities. The Lab supports three graduate assistants and two undergraduate students. In addition a summer program supporting local area High School students is part of the funded lab activities. The funding from this grant has allowed the purchase of new instrumentation for antenna measurements in the anechoic chamber, and for measurements ... |
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| Automatic Methods and Tools for the Verification of Real Time Systems |
31 JUL 1997 |
8 pages |
| Authors:
Thomas A. Henzinger; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| We developed formal methods and tools for the verification of real- time systems. This was accomplished by extending techniques, based on automata theory and temporal logic, that have been successful for the verification of time-independent reactive systems. As system specification lan^maage for embedded real-time systems, we introduced hybrid automata, which equip traditional discrete automata with real-numbered clock variables and continuous environment variables. As requirements specification languages, we introduced temporal logics ... |
|
| Transducing Composite of Sintered Piezoelectric Ceramic Granules in a Polymer Matrix |
30 JUL 1997 |
19 pages |
| Authors:
Manfred Kahn; Mark Chase; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A piezoelectric ceramic-polymer composite is made of a substantially two-dimensional polymer matrix and a monolayer of sintered piezoelectric ceramic granules dispersed throughout the matrix so that each granule has an upper portion protruding from one side of the matrix and a lower portion protruding from the opposite side of the matrix. The composite is formed by partially embedding a monolayer of sintered piezoelectric ceramic granules in a pliable material, then ... |
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| An FPGA Implementation of ATR Using Embedded Ram for Control |
30 JUN 1997 |
130 pages |
| Authors:
Richard D. Ross; BRIGHAM YOUNG UNIV PROVO UT DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Automatic Target Recognition (ATR) is a computationally intensive problem with potential for good performance when mapped to Field Programmable Gate Arrays (FPGAs). This thesis presents work that was done to implement the Sandia National Laboratory Chunky SLD stage of ATR on an Altera FLEX 10K50. The FLEX 10K series has large (256 x 8), dedicated, embedded memories that present an opportunity for unique and innovative implementations of computing algorithms. These ... |
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| Data Integration and Collection Environment System |
JUN 1997 |
28 pages |
| Authors:
David Priester; TRW ELECTRONIC SYSTEMS GROUP WARNER ROBINS GA
|
| The major goal of the Data Integration and Collection Environment (DICE) program was to develop a flightworthy prototype of an on-board instrumentation system capable of collecting pertinent data from an embedded information system. The target platform was the F-15 APG-63 radar. |
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| Spatially Averaging Fiber Optic Accelerometer Sensors |
27 MAY 1997 |
|
| Authors:
Nicholas Lagakos; Joseph A. Bucaro; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An optical fiber which includes a light transmitting center portion, a protecting layer and a stress preventing layer. The protecting layer concentrically surrounds the center portion and the stress preventing layer concentrically surrounds the center portion and is positioned between the protecting layer and the center portion. The stress preventing layer has a Young's Modulus substantially lower than the Young's Modulus of the protecting layer. The optical fiber can be ... |
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| Documentation for Caps User Interface and Graphic Editor |
MAR 97 |
134 pages |
| Authors:
Antionette C. Bell; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Computer-Aided Prototyping System (CAPS) is an integrated environment, comprised of an integrated set of software tools, aimed at rapidly prototyping hard realtime embedded systems. The problem with the current CAPS software development environment is the absence of a CAPS User's Manual (How to Use...), which provides CAPS users with step-by-step guidelines on how to use the CAPS tools. One solution to this problem was solved by designing, developing, and ... |
|
| Synthesis of Ceramics from Solutions: Functionally Graded Composites, NanoComposites and Single Crystal Thin Films. Technical Reports 1 - 7 with a Technical Summary |
28 FEB 97 |
7 pages |
| Authors:
Fred F. Lange; CALIFORNIA UNIV SANTA BARBARA DEPT OF MATERIALS
|
| This program has emphasized two topics: (1) the crystallization of metastable, solid-solution structures, their partitioning into equilibrium structures and compositions, and the role of the metastable phase and its partitioning on forming unique, nanometer microstructures important to the mechanics of structural ceramics and their composites, and (2) the formation of single crystal thin films via spin coating single crystal substrates with solution precursors. Results for the first topic are new, ... |
|
| Operational Requirements Document for the Future Digital Radio (FDR) |
14 FEB 1997 |
17 pages |
| Authors:
ARMY COMMUNICATIONS-ELECTRONICS COMMANDFORT MONMOUTH NJ
|
| The Future Digital Radio will operate as a system of the Command and Control (C2) Mission Area to provide a means for transport of Information Exchange Requirements (IERs) between users throughout the battlefield. Various configurations of FDR user radios will support a wide variety of users in networks that will range from low capacity voice or data nets to high capacity video links or Wide Area Networks (WANs) covering large ... |
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| C4 Software Technology Reference Guide - A Prototype |
10 JAN 97 |
|
| Authors:
Michael Bray; Kimberly Brune; David A. Fisher; John Foreman; Mark Gerken; CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST
|
| The Air Force acquisition community tasked the Software Engineering Institute (SEI) to create a reference document that would provide the Air Force with a better understanding of software technologies. This knowledge will allow the Air Force to systematically plan the research and development (R&D) and technology insertion required to meet current and future Air Force needs, from the upgrade and evolution of current systems to the development of new systems. ... |
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| Nonlinear Dynamics of the Additive-Pulse Modelocked Laser |
JAN 97 |
132 pages |
| Authors:
Eric J. Mozdy; CORNELL UNIV ITHACA NY
|
| A model of the additive-pulse modelocked (APM) laser is developed, with an emphasis on nonlinear dynamics. The APM laser has been traditionally used as a stable, pulsed light source, with multiple regions of instability that hamper useful operation. Many of these instabilities are deterministic, resulting from large levels of nonlinearity, and can be exploited if understood. In this thesis, the different elements of a typical APM laser are studied, and ... |
|
| Advanced Hard Real-Time Operating System, the Maruti Project. Part 2 |
JAN 1997 |
200 pages |
| Authors:
Ashok K. Agrawala; Satish K. Tripathi; MARYLAND UNIV COLLEGE PARK DEPT OF COMPUTER SCIENCE
|
| System correctness for real time systems relies on both functional and temporal correctness of the system components. In order to allow creation and deployment of critical applications with hard real time constraints in a reactive environment, we have developed the Maruti environment, which consists of the Maruti operating system and runtime environment, and an application development and environment that uses the Maruti Programming Language (MPL), an extension of ANSI C; ... |
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| APGAN and RPMC: Complementary Heuristics for Translating DSP Block Diagrams into Efficient Software Implementations |
JAN 1997 |
34 pages |
| Authors:
Shuvra S. Bhattacharyya; Praveen K. Murthy; Edward A. Lee; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| Dataflow has proven to be an attractive computational model for graphical DSP design environments that support the automatic conversion of hierarchical signal flow diagrams into implementations on programmable processors. The synchronous dataflow (SDF) model is particularly well-suited to dataflowbased graphical programming because its restricted semantics offer strong formal properties and significant compile-time predictability, while capturing the behavior of a large class of important signal processing applications. When synthesizing software for ... |
|
| A Comparative Study and Estimation of the Life-Cycle Cost Impact of Application of Real-Time Non-Intrusive (RTNI) Monitoring Technology to Real-Time Embedded Systems |
97 |
84 pages |
| Authors:
Michael D. Lewis; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF LOGISTICS AND ACQUIS ITION MANAGEMENT
|
| The use of real time non-intrusive (RTNI) monitoring has had an impact on life cycle costs of existing programs through a reduction in debug time. Other areas in which RTNI monitoring can provide potential benefits to future programs are through the use of increased dynamic testing and the sharing of testing time among more engineers. There are a number of areas in which software life cycle costs are impacted by ... |
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| Benchmarking Methodology for Real-Time Embedded Scalable High Performance Computing |
DEC 96 |
34 pages |
| Authors:
Richard A. Games; MITRE CORP BEDFORD MA
|
| This application of scalable high performance computing to real time embedded systems is expanding. Traditional benchmarks and notions of scalability drawn from the scientific parallel computing community are of limited relevance when timing requirements must be met within strict size, weight, and power requirements. This paper proposes a bench marking methodology for real time embedded applications, including a relevant notion of scalability. The essential point is to give equal emphasis ... |
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| Health Risk Assessment of Embedded Depleted Uranium: Behavior, Physiology, Histology and Biokenetic Modeling |
NOV 1996 |
43 pages |
| Authors:
Terry C. Pellmar; ARMED FORCES RADIOBIOLOGY RESEARCH INSTBETHESDA MD
|
| This study evaluates the consequences of both short-term and long- term exposure to DU fragments in the rat model. Using an interdisciplinary approach, we are assessing neurotoxicity, nephro-toxicity, histopathology of the tissue surrounding the fragment and pathology including evaluation of neoplastic changes in several body tissues. In addition, based on our animal data, we will develop a biokinetic model that describes the distribution of uranium from embedded fragments as a ... |
|
| An Operational Analysis for 2025 |
OCT 96 |
81 pages |
| Authors:
Jack A. Jackson Jr.; Brian L. Jones; Lee J. Lehmkuhl; AIR UNIV MAXWELL AFB AL
|
| In the summer of 1995 the Air Force chief of staff tasked Air University to do a year-long study, 2025, to "generate ideas and concepts on the capabilities the United States will require to possess the dominant air and space forces in the future ,TO detail. . . new or high-leverage concepts for employing air and space power I, and to detail . . . the technologies required to enable ... |
|
| Real-Time Parallel Software Design Case Study: Implementation of the RT- 2DFFT Benchmark on the MasPar MP-X Architecture |
OCT 96 |
97 pages |
| Authors:
David P. Koester; Joseph J. Rushanan; MITRE CORP BEDFORD MA
|
| The MITRE real time embedded scalable high performance computing benchmarking concept was extended and tested by implementing the Real Time-Two Dimensional Fast Fourier Transform (RT-2DFFT) benchmark on the Maspar MP-X series of massively parallel processors (MPPs). The RT-2DFFT benchmark specifies a symmetric two dimensional fast fourier transform (FFT) within a real-time software test bench. The test bench provides the realistic stimulus for the RT- 2DFFT benchmark, including input output from/to ... |
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| Simulation and Analysis of Predictive Read Cache (PRC) Performance |
SEP 96 |
56 pages |
| Authors:
Altay Camligueney; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Memory subsystem bandwidth and latency are two major problems for modern computer architectures because memory speed should grow linearly with central processing unit (CPU) speed to maintain balanced system performance. However, in recent years, CPU speed has increased much more rapidly than memory speed. One common approach to memory system design, which can provide remarkable speedup, is to use one or more fast cache memories in a hierarchical architecture. The ... |
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| Thermally Switchable Periodicities and Diffraction from Novel Mesoscopically Ordered Materials |
SEP 96 |
16 pages |
| Authors:
J. M. Weissman; H. B. Sunkara; A. S. Tse; S. A. Asher; PITTSBURGH UNIV PA DEPT OF CHEMISTRY
|
| Two novel switchable, mesoscopically periodic materials were created by combining crystalline colloidal array (CCA) self-assembly with the temperature-induced volume phase transition of poly(N-isopropylacrylamide) (PNIPAM). Body-centered cubic (BCC) CCA of hydrated, swollen PNIPAM particles Bragg diffract infrared (IR), visible, and ultraviolet (UV) light weakly, while arrays of compact shrunken particles diffract efficiently. A tunable diffracting array was also created by embedding a CCA of polystyrene spheres within a PNIPAM hydrogel, that ... |
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| Smart Composite Plate Shape Control Using Piezoelectric Materials |
SEP 96 |
|
| Authors:
M. A. Elshafei; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In the present work, the shape control of fiber reinforced composite plate with embedded piezoelectric actuators is investigated. A finite element formulation is developed for modeling a laminated composite plate that has distributed piezoelectric actuators and sensors subjected to both mechanical and electrical loads. A simple, higher order, shear deformation theory with Hamilton's principle is used to formulate the equations of motion. The model represents the parabolic distribution of transverse ... |
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| Image Processing Algorithms for KKVS with IR Imaging Sensors |
SEP 96 |
7 pages |
| Authors:
L. L. Hung; D. L. Webb; D. F. Elliott; V. T. Chandler; ROCKWELL INTERNATIONAL ANAHEIM CA
|
| Image processing algorithms enable a kinetic kill vehicle (KKV) with an IR imaging sensor to intercept a missile warhead in space. The algorithms are required to determine the target position soon enough and with such accuracy that the KKV can divert itself toward a successful impact. This is affected by (1) target brightness, shape, rotational motion, and associated objects such as debris, (2) sensor characteristics including aperture size and signal ... |
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| High Gain, Low Noise and Broadband Raman and Brillouin Fiber-Optic Amplifiers, Channel Selectors and Switches |
01 AUG 96 |
36 pages |
| Authors:
Chung Yu; NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO DEPT OF ELECT RICAL ENGINEERING
|
| Wavelength independent Raman (sRs) and Brillouin (sBs) scattering processes in singlemode fibers have been exhaustively investigated for optical amplification-key to channel selection and switching in optical communication. The low gain and high pump threshold of sRs and the high gain, low pump threshold, but extremely narrowband sBs prevented further consideration of these processes for possible optical device fabrication for communication. Fiber rings have been employed to attempt to further lower ... |
|
| Regulation of Epidermal Growth Factor Receptor Expression by PML in Human Breast Cancer |
AUG 96 |
11 pages |
| Authors:
Khew-Voon Chin; CANCER INST OF NEW JERSEY PISCATAWAY
|
| Expression of PML has been shown to be altered in breast cancer. In normal breast specimens, less than 3% of the epithelial cells exhibit PML staining, but increasing levels of PML was detected as the lesions progress from benign dysplasias to carcinomas. These studies suggest that PML may play a critical role in breast carcinogenesis. We have been studying the function of PML as a transcription regulator of the epidermal ... |
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| Instructional Program: Embedded Instructional Program ECI Deliverable |
AUG 96 |
107 pages |
| Authors:
Timothy C. Clifton; BDM FEDERAL INC SEASIDE CA
|
| The Embedded instructional Program was developed based on a task analysis to identify the skills required to operate the ECI. The Embedded Instructional Program consists of two components. The first, FORMPLAYER tutorial, trains the user on how to enter information into a predefined electronic form. The FORMPLAYER Tutorial is divided into nine topics. The second component, FORMDESIGNER Tutorial, trains the user on how to develop electronic forms. The FORMDESIGNER Tutorial ... |
|
| High Gain, Low Noise and Broadband Raman and Brillouin Fiber-Optic Amplifier, Channel Selectors and Switches |
AUG 96 |
36 pages |
| Authors:
Chung Yu; NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO DEPT OF ELECT RICAL ENGINEERING
|
| Wavelength independent Raman (sRs) and Brillouin (sBs) scattering processes in singlemode fibers have been exhaustively investigated for optical amplification - key to channel selection and switching in optical communication. The low gain and high pump threshold of sRs and the high gain, low pump threshold, but extremely narrowband sBs prevented further consideration of these processes for possible optical device fabrication for communication. Fiber rings have been employed to attempt to ... |
|
| Research on the Causes of Dynamical Instability in Combat Models |
AUG 96 |
55 pages |
| Authors:
Julian I. Palmore; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| Combat models are nonlinear deterministic models of decision making processes that deal with attrition of opposing forces. They contain dynamical instabilities that destroy the robustness of a simulation and interfere with a simulation's consistency fidelity, reliability, transportability, and validity. Nonlinear behavior in a model's design is a primary source of instability. Striking effects of instabilities on the performance of a combat model are found in computer arithmetic that cause global ... |
|
| A Guide for Early Embedded Training Decisions. Second Edition |
JUL 96 |
127 pages |
| Authors:
Bob G. Witmer; Bruce W. Knerr; ARMY RESEARCH INST FOR THE BEHAVIORAL AND SOCIAL SCIENCES ALEXANDRIA VA
|
| Embedded Training (ET) is training built into or added to a weapons system. Although Army policy requires training developers to consider ET before other training options, effective implementation of this policy has been hampered by the lack of specific procedures to determine whether training should be embedded or not. This report provides a set of guidelines--in the form of detailed decision flowcharts-- to assist training developers and engineers in making ... |
|
| Assessment of Embedded Sensors for Health-Status Monitoring |
JUL 96 |
24 pages |
| Authors:
Daniel L. Schodek; HARVARD UNIV CAMBRIDGE MA
|
| Newly developing advanced medical technologies based on remote diagnosis, consultation and treatment offer the potential for improving outcomes by extending advanced health care more directly into the environments that military patient-users actually inhabit or work within; such as military housing, workplace or task environments, outpatient clinics, and deployable health care modules. This approach promises to improve access and reduce costs by reducing demands to use specialized medical facilities for common ... |
|
| Establishment of an Animal Model to Evaluate the Biological Effects of Intramuscularly Embedded Depleted Uranium Fragments |
JUL 96 |
20 pages |
| Authors:
Carl A. Castro; Kimberly A. Benson; Victor Bogo; Eric G. Daxon; John B. Hogan; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| During the Persian Gulf War, 36 U.S. soldiers were wounded by depleted uranium (DU) munitions. Based on medical guidelines for conventional shrapnel injuries (nonradioactive), many DU fragments were left in soldiers. Unfortunately, health risks associated with embedded DU were unknown, and an animal model to investigate this did not exist. The purpose of this study was to develop an animal model to examine the health risks associated with DU shrapnel ... |
|
| Molecular Diagnosis for Breast Malignancy |
JUL 96 |
29 pages |
| Authors:
Wen-Tien Chen; GEORGETOWN UNIV WASHINGTON DC
|
| This grant investigates the role of EMMPRIN, seprase and DPPIV in breast cancer invasion and metastasis. The aims are to evaluate these conceivable invasion-related molecules as prognostic markers for node-negative breast cancer. We identified, cloned, and sequenced a full-length cDNA that encoded for a 58-kDa human tumor derived collagenase-stimulating factor, called EMMPRIN. We have expressed EMMPRIN in COS7 monkey kidney cells and human breast cancer cells in order to test ... |
|
| Integrated Model Development Environment (IMDE) Support for Air Force Logistics |
JUL 96 |
50 pages |
| Authors:
Todd Carrico; Patrick K. Clark; ANALYTIC SCIENCES CORP FAIRBORN OH
|
| This report documents research performed for the Integrated Model Development Environment (IMDE) by Armstrong Laboratory, Logistics Research Division, Wright-Patterson AFB, Ohio. IMDE is a simulation development system designed to demonstrate how an object oriented modeling approach embedded within a graphical user interface could make large-scale logistics models easier to develop and less expensive to maintain, as well as improving configuration control, data analysis, collaborative development, and model reuse. The IMDE ... |
|
| An Objective Information Architecture for the Army of the Twenty-First Century: Courting Athena |
07 JUN 96 |
106 pages |
| Authors:
Richard E. Volz; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| This study investigates the current division level Command, Control, Communications, Computers and Intelligence (C4I) information architecture and its ability to support Army divisions in the twenty-first century. Current developmental efforts are examined to determine their ability to support the warfighting Commander's Critical Information Requirements. The study then explores trends in information technology under development within commercial industry. A conceptual information architecture, Athena, is then presented to meet war fighting requirements ... |
|
| Effect of Metalloid Impurities on Grain Boundary Stability in Tantalum |
MAY 96 |
27 pages |
| Authors:
Genrich L. Krasko; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Metalloid impurities have a very low solubility in tantalum and, therefore, prefer to segregate at the grain boundaries (GBs). In order to analyze the energetics of the impurities on the tantalum GB, the first- principles calculations were performed on a simple eight-atom supercell emulating a typical (capped trigonal prism) GB environment. The 'environment- sensitive' embedding energies were calculated for hydrogen, boron, carbon, nitrogen, oxygen, phosphorus, and sulphur, as a function ... |
|
| Functional Specification for a Battlefield Management System for the Light Reconnaissance Vehicle (Functionele specificatie voor een 'Battlefield Management System' voor het Lichte Verkennings- en Bewakingsvoertuig) |
MAY 96 |
|
| Authors:
A. Bot; C. W. D'Huy; P. F. Krekel; M. D. van der Lee; E. W. van Leeuwen; FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS)
|
| Within the RNLA a new light reconnaissance vehicle (LVB) will be introduced. This vehicle will be equipped with a Battlefield Management System (BMS). This report contains the functional specifications for such a BMS by giving answers to the following five questions: What functionalities should the BMS provide? Are the functionalities technical achievable? How do the functionalities relate to other (international) BMS programmes? Does the introduction of a BMS have any ... |
|
| An Operational Analysis for Air Force 2025: An Application of Value- Focused Thinking to Future Air and Space Capabilities |
MAY 1996 |
191 pages |
| Authors:
Jack A. Jackson Jr.; Brian L. Jones; Lee J. Lehmkuhl; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
|
| In the summer of 1995 the Air Force chief of staff tasked Air University to conduct a year-long study Air Force 2025 to "generate ideas and concepts on the capabilities the United States will require to possess the dominant air and space forces in the future, detail.....new or high-leverage concepts for employing air and space power detail....the technologies required to enable the capabilities envisioned." To support this goal an operational ... |
|
| Novel Diagnostic Techniques and Actuator Technology for Turbulent Shear Flows |
30 APR 96 |
76 pages |
| Authors:
Ari Glezer; GEORGIA INST OF TECH ATLANTA SCHOOL OF MECHANICAL ENGINEERING
|
| A new approach to the manipulation and control of shear flows using novel fluidic technology based on synthetic jets has been developed. These jets have the unique property of being zero-mass-flux in nature; i.e., they are synthesized from the working fluid in the flow system in which they are embedded. Although there is no net mass injection into the overall system, the jets allow momentum transfer into the embedding flow. ... |
|
| High Temperature Nonlinear Optical Chromophores and Polymers |
31 MAR 96 |
65 pages |
| Authors:
Robert D. Miller; IBM ALMADEN RESEARCH CENTER SAN JOSE CA
|
| We have developed a thermal protocol for the evaluation of NLO chromophores for very high temperature electro-optical applications with poled polymers. This protocol has been demonstrated to have significant predictive utility for EO applications. We have demonstrated that while chromophore thermal instability and nonlinearity are linked, this relationship is not inviolable. Certain thermally stable NLO chromophores have been incorporated into polyimide derivatives either by flexible tether connections or by direct ... |
|
| Implementation and Efficiency of Stegano-Graphic Techniques in Bitmapped Images and Embedded Data Survivability Against Lossy Compression Schemes |
MAR 96 |
88 pages |
| Authors:
Daniel L. Currie III; Hannelore Campbell; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The term steganography is descriptive of techniques used to covertly communicate by embedding a secret message within an overt message. Such techniques can be used to hide data within digital images with little or no visible change in the perceived appearance of the image and can be exploited to covertly export sensitive information. This thesis explores the data capacity of bitmapped image files and the feasibility of devising a coding ... |
|
| Embedded Computers: B-1B Computers Must Be Upgraded to Support Conventional Requirements |
FEB 96 |
|
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC ACCOUNTING AND INFORMATION MANAGEMENT DIV
|
| At the request of the Subcommittee on Military Research and Development, House Committee on National Security, the General Accounting Office (GAO) has reviewed the Air Force's efforts to upgrade the computers and software for the B-1B Bomber Conventional Mission Upgrade Program (CMUP). GAO's National Security and International Affairs Division is studying other aspects of the B- 1B and the role of bombers for specific missions. This letter discusses recent decisions ... |
|
| Optical Fiber with High Acceleration Sensitivity and Low Pressure Sensitivity for Use in Spatially Averaging Fiber Optic Accelerometer Sensors. |
24 JAN 1996 |
81 pages |
| Authors:
Nicholas Lagakos; Joseph A. Bucaro; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An optical fiber which includes a light transmitting center portion, a protecting layer and a stress preventing layer. The protecting layer concentrically surrounds the center portion, and reduces the effect of environmental factors on the center portion. The stress preventing layer concentrically surrounds the center portion and is positioned between the protecting layer and the center portion. The stress preventing layer has a Young's Modulus substantially lower than the Young's ... |
|
| Ferroelectric Ceramic/Polymer Bimorph Sensor for Strain Measurement in Laminates. |
JAN 1996 |
3 pages |
| Authors:
M. P. Wenger; D. K. Das-Gupia; UNIVERSITY COLL OF NORTH WALES BANGOR SCHOOL OF ELECTRONIC ENGINEERING AND CO MPUTER SYSTEMS
|
| Flexural (or bending) piezoelectricity of a piezoelectric monomorph film may be enhanced by bonding two or even a number of multiple poled films to form a bimorph or a multimorph. The compliance of ceramic/polymer composite is generally greater than piezoceramics. We have produced calcium modified lead titanate, PTCa/copolymer of vinylidene fluoride trifluoroethylene, P(VDF-TrFE) and PTCa/Epoxy composites and have successfiilly embedded such composite films in glass-laminate structure and detected acoustic emission ... |
|
| Real-Time Parallel Software Design Case Study: Implementation of the RASSP SAR Benchmark on the Intel Paragon |
JAN 96 |
31 pages |
| Authors:
Curtis P. Brown; Richard A. Games; John J. Vaccaro; MITRE CORP BEDFORD MA
|
| A software design process for mapping real time applications onto massively parallel processors is described. The design methodology incorporates a software test bench used to evaluate the level of real-time performance the processing nodes are capable of delivering. The test bench results incorporate the overheads of periodic processing (simple communication, control flow, buffering, etc.) and therefore provide realistic performance levels. The final integration step maintains the simple test bench interfaces ... |
|
| Automatic Target Recognition Directed Image Compression |
1996 |
9 pages |
| Authors:
Charles D. Creusere; Alan Van Nevel; NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA
|
| In this paper, we present a novel synthesis of two separate aspects of image processing: automatic target recognition/cueing (ATR/ATC) and embedded image compressian. In order to maximize the information content of a transmitted image, an ATR algorithm is used to detect potential areas of interest, and the compression algorithm regionally compresses the image, allocating more bits to the areas of interest. In this fashion, contextual information is retained, albeit at ... |
|
| Using Embedded COMSEC: An Integrator's Viewpoint |
96 |
|
| Authors:
Thomas Kibalo; W. E. Boebert; HONEYWELL INC ST ANTHONY MN SECURE COMPUTING TECHNOLOGY CENTER
|
| In order to expand COMSEC equipment availability, standardized usage, and lower COMSEC equipment cost, NSA established the Development Center for Embedded COMSEC Products (DCECP). The output of the DCECP, under a program entitled Project Overtake, is a standard set definition of COMSEC modules to be used in embedded applications to provide the encryption/decryption functional requirements in link, data, and voice COMSEC systems. These modules are called Forsee, Tepache and Winstor ... |
|
| Space-Time Analysis of the Flow-Induced Vibration of a Solid Containing an Embedded Cylindrical Shell |
18 DEC 95 |
44 pages |
| Authors:
Andrew J. Hull; Bruce M. Abraham; NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI
|
| This report develops a model of a viscoelastic solid that contains an embedded cylindrical shell through which fluid flows at low Mach number. The model output corresponds to the displacement that a beamformed, steered array of sensors would measure in wavenumber and frequency. The solid and the shell are modeled using elasticity equations of isotropic mediums. The fluid is modeled with two pressure terms: one that represents the acoustic pressure ... |
|
| Unique Fiber Optic Sensor System for Residual Stress Measurement on Graphite Composites |
DEC 1995 |
39 pages |
| Authors:
D. Bullock; FOSTER-MILLER INC WALTHAM MA
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| Virtually every composite fabrication process inherently results in the presence of residual strain in the component produced. Residual strain can result in warping and distortion of the finished part and seriously affect the component mechanical response to service loads. Measurement of this strain through the thickness of a composite is not a trivial task. Foster-Miller has developed the basis for a residual strain measurement system utilizing embedded fiber optic Bragg ... |
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| Design Considerations for Stretch Conductors in Oceanographic Moorings |
DEC 95 |
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| Authors:
Walter Paul; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| A copper conductor formed into a helical configuration like a telephone cord can stretch by extending its geometry without elongating the conductor itself. This report establishes the proper configuration of copper conductors arranged in a helical pattern around a fiber core which can be used as center of a nylon rope with at least 20 percent working stretch. The calculation procedure allows the determination of the conductor's helix angle or ... |
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