| Environmental Support to Amphibious Craft, Patrol Boats, and Coastal Ships: An Annotated Bibliography |
05 MAR 2008 |
48 pages |
| Authors:
Charles M. Bachmann; Robert A. Fusina; C. R. Nichols; Jack McDermid; NAVAL RESEARCH LAB WASHINGTON DC
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 | This annotated bibliography is a selection of citations to books, articles, documents, and data bases highlighting environmental conditions that impact the safety and performance of amphibious craft, patrol boats, and ships designed for coastal operations. Each citation is followed by a brief summary and evaluation of the source (i.e., the annotation). Most annotations will define the scope of the source, list significant cross references, and identify the relevant environmental conditions. ... |
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| Uncorrelated Track Avoidance |
MAR 2008 |
112 pages |
| Authors:
Darrell L. Grob; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this thesis is to examine what data requirements are necessary to avoid continual series of uncorrelated tracks when gathering observations. The constants of the motion for simple two-body motion for a satellite orbiting the Earth, known as the classical orbital elements do not remain constant due to zonal and sectoral harmonic variations in the Earth's gravitational field. There are other elements of the motion that should be ... |
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| Performance Analysis of Recurrence Matrix Statistics for the Detection of Deterministic Signals in Noise |
04 JAN 2008 |
33 pages |
| Authors:
Joseph V. Michalowicz; Jonathan M. Nichols; Frank Bucholtz; NAVAL RESEARCH LAB WASHINGTON DC OPTICAL TECHNIQUES BRANCH
|
| Understanding the limitations to detecting deterministic signals in the presence of noise, especially additive, white Gaussian noise, is of importance for the design of LPI systems and anti-LPI signal defense. In this report, we investigate the use of recurrence plots for such detection, and we compare the performance of a recurrence-plot-based detector to a standard power-detection approach. Performance is evaluated using receiver-operator characteristic (ROC) curves. |
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| A Fuzzy Logic Algorithm to Assign Confidence Levels to Heart and Respiratory Rate Time Series |
03 JAN 2008 |
15 pages |
| Authors:
Jean Liu; Thomas M. McKenna; A. Gribok; Beth A. Beidleman; William J. Tharion; Jaques Reifman; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA BIOPHYSICS AND BIOMEDICAL MODELING DIV
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| We have developed a fuzzy logic-based algorithm to qualify the reliability of heart rate (HR) and respiratory rate (RR) vital-sign time-series data by assigning a confidence level to the data points while they are measured as a continuous data stream. The algorithm s membership functions are derived from physiology-based performance limits and mass-assignment-based datadriven characteristics of the signals. The assigned confidence levels are based on the reliability of each HR ... |
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| Real Time Estimation and Prediction using Optimistic Simulation and Control Theory Techniques |
JAN 2008 |
44 pages |
| Authors:
Jeffrey Steinmen; Craig Lammers; WARPIV TECHNOLOGIES INC SAN DIEGO CA
|
| This paper describes a revolutionary approach to information processing that will increase warfighter productivity by orders of magnitude for problems requiring analysis, planning, optimization, and dynamic situation assessment and prediction in live operational environments. This technology, known as HyperWarpSpeed, breaks the four-dimensional barrier of space and time by extending modeling, simulation, and analysis capabilities into the fifth dimension. |
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| Hull, Mechanical, and Electrical Equipment Standardization in the U.S. Navy Surface Force: A Case of Competing Objectives and Stakeholder Trade-Off Decisions |
14 DEC 2007 |
156 pages |
| Authors:
Jerome R. White; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| The lack of a successful Standardization Program for Hull, Mechanical, and Electrical (HM&E) equipment and components of ships in the surface force costs the United States Navy hundreds of millions of dollars annually. Approximately half of the total parts in the surface fleet are installed on three or fewer ships and nearly 20 percent are one of a kind. These parts are not officially considered to be "non-standard" since they ... |
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| Military Aircraft: C-17 Program Background |
03 DEC 2007 |
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| Authors:
William Knight; Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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 | The C-17 Globemaster III is a long-range cargo/transport aircraft operated by the U.S. Air Force since 1993. To date, Congress has funded 190 C-17s for the Air Force. The C-17 program remains a key issue as Congress evaluates the needs of the Department of Defense's (DoD) strategic airlift force. This paper provides program background for the C-17. For more detailed analysis of current issues regarding the C-17 acquisition, see CRS ... |
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| Free Electron Laser Performance with Quadruple Magnet Misalignment from Shipboard Vibrations |
01 DEC 2007 |
79 pages |
| Authors:
David T. Burggraff; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Free Electron Laser (FEL) has been discussed and studied in the United States Navy s directed energy weapon efforts. The goal of these studies is to use the FEL as a ship s primary defensive weapon against incoming threats such as missiles, aircraft and small boats. This thesis is an analysis of the effects of shipboard vibration on the performance of an FEL. The focus of this analysis will ... |
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| High-Assurance System Support through 3-D Integration |
09 NOV 2007 |
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| Authors:
Theodore Huffmire; Timothy Levin; Cynthia Irvine; Thuy Nguyen; Jonathan Valamehr; Ryan Kastner; Timothy Sherwood; NAVAL POSTGRADUATE SCHOOL MONTEREY CA CENTER FOR INFORMATION SYSTEMS SECURITY STUDIES AND RESEARCH
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| While hardware resources, in the form of both transistors and full microprocessor cores, are now fairly abundant, economic factors continue to prevent the integration into commodity parts of specialized hardware mechanisms required for secure processing. Multi-core processors, due to their wide adoption, impressive performance, and low cost, are very attractive platforms for computation. Unfortunately, highly secure processing of sensitive information on such platforms is extremely difficult to achieve due to ... |
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| Performance Characterization of the Free Molecule Micro-Resistojet Utilizing Water Propellant (Preprint) |
24 MAY 2007 |
12 pages |
| Authors:
R. H. Lee; A. M. Bauer; M. D. Killingsworth; T. C. Lilly; J. A. Duncan; Andrew D. Ketsdever; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| Advances in micro-technology manufacturing and capability have led to an increased interest in micro and nano-satellites. A propulsion system has been designed to meet the on-orbit attitude control requirements for nano-spacecraft. The Free Molecule Micro-Resistojet (FMMR), a low cost, low power, high propellant storage density, and green propulsion system, has been analyzed in this study to determine its ability to provide a slew maneuver for a typical 10 kg nanosatellite. ... |
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| Polymer Nanocomposite Thin Film Mirror for the Infrared Region (Preprint) |
MAY 2007 |
17 pages |
| Authors:
N. Mandzy; E. Grulke; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| Thin film metal oxide coatings have been used commercially for electromagnetic filters from the UV to the infra red regions for over half a century. Deposition onto a substrate has typically been accomplished using vapor deposition techniques and more recently sol-gel methods. These coatings provide very good optical performance under abrasion, thermal cycles and variable humidity when applied on substrates with similar thermal and mechanical properties. When conventional metal oxide ... |
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| Nuclear Weapons: Annual Assessment of the Safety, Performance, and Reliability of the Nation's Stockpile |
02 FEB 2007 |
24 pages |
| Authors:
GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
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| To satisfy the requirements of section 3141 of the National Defense Authorization Act for Fiscal Year 2003, DOD and DOE have established an annual assessment process that reaches conclusions and makes judgments about the U.S. nuclear stockpile and, in particular, whether it is necessary to conduct an underground nuclear test to resolve any questions about a particular weapon type. The annual assessment process takes about 14 months to complete during ... |
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| Performance Metrics for Acoustic Small Arms Localization Systems |
01 OCT 2006 |
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| Authors:
Jacques Bedard; DEFENCE RESEARCH AND DEVELOPMENT CANADA VALCARTIER (QUEBEC)
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| In the past ten years, in-air acoustic sensor systems have been developed for the localization of small arms fire. A number of countries have systems at different stages of advancement that they have deployed on operations. These systems are being mounted on vehicles to provide crews with better situational awareness, thereby enhancing crew safety and force protection. The acoustic system is starting to be incorporated into vehicle equipment as a ... |
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| Shallow Water UXO Technology Demonstration Site Scoring Record No. 1, Site Location, U.S. Army Aberdeen Proving Ground, Demonstrator, Geophex, LTD |
SEP 2006 |
51 pages |
| Authors:
Gary W. Rowe; ABERDEEN TEST CENTER MD COMMANDER OF DEVELOPMENT AND TEST COMMAND
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| This report documents the efforts of Geophex, Ltd. to detect and discriminate inert unexploded ordnance (UXO) using a GEM-3 electric magnetic sensor array modified for use in a shallow water environment. Testing was conducted at ATC, Standardized Shallow Water UXO Technology Demonstration Site. A description of the tested system and an estimate of survey costs along with the analysis of the system performance are provided. |
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| 100X Joint Battlespace Infosphere (JBI) |
AUG 2006 |
62 pages |
| Authors:
George O. Ramseyer; Lok Kwong-Yan; Richard W. Linderman; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
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| The 100X Joint Battlespace Infosphere (JBI) program is developing a high-performance information management architecture that is based upon the JBI reference implementation. The JBI reference implementation, developed at AFRL, specifies core services and a Common Application Program Interface (CAPI) for a network-centric platform to support Command and Control communications. The 100X JBI meets the conceptual goals of the JBI by implementing the JBI CAPI and adhering to the standards established ... |
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| Concurrent Performance of Gunner's and Robotic Operator's Tasks in a Simulated Mounted Combat System Environment |
JUN 2006 |
56 pages |
| Authors:
Jessie Y. Chen; Carla Joyner; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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| We simulated a Mounted Combat System (MCS) environment and conducted an experiment to examine the workload and performance of the combined position of gunner and robotic operator. Results showed that gunner's target detection performance degraded significantly when s/he had to concurrently monitor, manage, or teleoperate an unmanned ground vehicle compared to the baseline condition (gunnery task only). For the robotic tasks, participants detected significantly fewer targets when their robotic asset ... |
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| Cycle Performance of a Pulse Detonation Engine with Supercritical Fuel Injection |
23 MAR 2006 |
188 pages |
| Authors:
Timothy M. Helfrich; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Pulse detonation engines (PDE) rely on rapid ignition and formation of detonation waves. Because hydrocarbon fuels are composed typically of long carbon chains that must be reduced in the combustion process, it would be beneficial to create such reduction prior to injection of fuel into the engine. This study focused on PDE operation enhancements using dual detonation tube, concentric-counter-flow heat exchangers to elevate the fuel temperature up to supercritical temperatures. ... |
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| Nonlinear Suppression of Range-Ambiguous Clutter for Outdoor Radar Measurement Facilities |
MAR 2006 |
60 pages |
| Authors:
Michael C. Baumgartner; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| In the outdoor measurement facility, a certain amount of real estate is owned by the organization, and therefore can be groomed to keep clutter contributions to a minimum. As the transmit signal travels further down range, however, returns from long-range clutter sources are inevitable and can have a significant impact on measurement accuracy. This research effort investigates the effectiveness of employing nonlinear suppression (NLS) to abate long-range ambiguous clutter in ... |
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| Future Satellite Navigation Services and Augmentations |
MAR 2006 |
10 pages |
| Authors:
Jay W. Spalding; COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT
|
| This report is intended to provide a high-level view of the evolving changes in satellite navigation services. Satellite navigation dates back as one of the first space applications. The report provides a chronological review of the development of the Global Positioning System (GPS), its current state, changes affecting the transition to a future state, and speculation on what that future state may bring. A detailed discussion of satellite navigation accuracy, ... |
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| Radar Performance of Temporal and Frequency Diverse Phase-Coded Waveforms |
JAN 2006 |
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| Authors:
Sofia Suvorova; Bill Moran; Elena Kalashyan; Peter Zulch; Robert J. Hancock; PROMETHEUS INC NEWPORT RI
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| We explore the use of binary phase-coded waveforms encoded in frequency and temporally diverse modes for radar detection of targets in clutter. Specifically, in this paper we study the use of complementary binary phasecoded waveforms and compare their performance to other, more conventional, suites of waveforms. We also give an ambiguity calculation showing the effects of time and frequency separation. |
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| The Next Great Engine War: Analysis and Recommendations for Managing the Joint Strike Fighter Engine Competition |
DEC 2005 |
77 pages |
| Authors:
Karl G. Amick; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis examines the competition between Pratt & Whitney (P&W) and General Electric Aircraft Engines (GEAE) to improve the engine for the air superiority fighter, the F-16. This first Great Engine War was an attempt by the U.S. Government to encourage Pratt & Whitney, the sole winner of the F-16 fighter engine propulsion contract, to be more responsive to shortcomings in the design and operation of its F100 engine. When ... |
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| Results of SEI Independent Research and Development Projects and Report on Emerging Technologies and Technology Trends |
DEC 2005 |
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| Authors:
Sagar Chaki; Rosann W. Collins; Peter Feiler; John Goodenough; Aaron Greenhouse; Jorgen Hansson; Alan R. Hevner; John Hudak; Angel Jordan; Rick Kazman; CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST
|
| Each year, the Software Engineering Institute (SEI) undertakes several Independent Research and Development (IR&D) projects. These projects serve to (1) support feasibility studies investigating whether further work by the SEI would be of potential benefit, and (2) support further exploratory work to determine whether there is sufficient value in eventually funding the feasibility study work as an SEI initiative. Projects are chosen based on their potential to mature and/or transition ... |
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| Personal Navigation System |
31 OCT 2005 |
51 pages |
| Authors:
Peter Sherman; Steven Holmes; CHARLES STARK DRAPER LAB INC CAMBRIDGE MA
|
| The U.S. Army has a need to provide an affordable navigation system to meet the multi-mission needs of the warfighter. Recent advances in Micro-Electro Mechanical System (MEMS) inertial instruments, Global Positioning System (GPS) receivers, GPS anti-jam technologies and state-of-the-art processing allow the development of a low-cost, GPS/INS-based Personal Navigation System (PNS) that will meet the expected power, size, weight, cost, and performance needs of the Ground Soldier System (formerly Future ... |
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| Comparison of Ventilation and Cardiac Compressions When Utilizing the Impact Model 730 Automatic Transport Ventilator Versus a Conventional Bag Valve With a Facemask in a Model of Adult Cadiopulmonary Arrest |
25 OCT 2005 |
22 pages |
| Authors:
Nicole R. Salas; Bernadette T. Wisor; Janice Agazio; Richard Branson; Paul N. Austin; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
|
| The purpose of this investigation was to evaluate the delivery of ventilation and compressions during two person CPR on an instrumented manikin. Basic Life Support was provided by registered nurses using a conventional bag valve mask ventilation or mask ventilation with an automatic transport ventilator, the Impact Model 730 (Impact Instrumentation, Inc., West Caldwell, NJ), that incorporates a metronome to facilitate chest compression timing. Twenty-eight nurses alternated performing 4 minutes ... |
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| Standardized UXO Technology Demonstration Site Moguls Scoring Record Number 380 (Geophysical Technology Limited) |
OCT 2005 |
69 pages |
| Authors:
Jr. Overbay Larry; Matthew Boutin; Rick Fling; Christina McClung; ABERDEEN TEST CENTER MD
|
| This scoring record documents the efforts of Geophysical Technology (G-TEK) Limited to detect and discriminate Inert unexploded ordnance (UXO) utilizing the APG Standardized UXO Technology Demonstration Site Moguls. Scoring Records have been coordinated by Larry Overbay and the Standardized UXO Technology Demonstration Site Scoring Committee. Organizations on the committee include, the U.S. Army Corps of Engineers, the Environmental Security Technology Certification Program, the Strategic Environmental Research and Development Program, the ... |
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| Leakage Reduction for On-Die Caches |
OCT 2005 |
34 pages |
| Authors:
Kaushik Roy; PURDUE UNIV LAFAYETTE IN SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Technology scaling is associated with exponential increase in leakage for every subsequent technology generation. Since cache memories take up a significant portion of the die in modern processors, leakage contributes largely to power dissipation in caches. Our effort was to reduce leakage in large caches. We investigated several leakage-tolerant co-design techniques at the circuit and architecture levels. We also considered the effectiveness of the proposed techniques with predictive scaled devices. ... |
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| Bayesian Inversion of Radar Clutter |
01 SEP 2005 |
7 pages |
| Authors:
Peter Gerstoft; William Hodgkiss; William A. Kuperman; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
|
| This report describes the research performed on behalf of the Office of Naval Research (grant #N00014-03-1-0393) to estimation of refractivity profiles from radar clutter returned. Through simulation and experimental results it is shown that the radar clutter return can be used for extracting refractivity profiles. Of particular interest is the uncertainty in these estimates and it is demonstrated how these parameters can be used for radar performance prediction. |
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| Characterization and Optimization of a Radiantly Driven Multi-Stage Knudsen Compressor |
13 JUL 2005 |
7 pages |
| Authors:
M. Young; Y. L. Han; E. P. Muntz; Geoff Shiflett; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
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| The Knudsen Compressor is a micro/meso-scale gas roughing pump that operates by utilizing the thermal transpiration effect. A Finite Element Knudsen Compressor Performance Model was constructed and used to investigate the pumpdown performance of large-scale Knudsen Compressor cascades. Model predictions were compared to experimental measurements made for radiantly driven Knudsen Compressors of up to 15 stages. The temperature difference maintained across the thermal transpiration membrane was measured and agreed with ... |
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| System Performance Operational Risk Assessment Tool (SPORAT) |
23 JUN 2005 |
18 pages |
| Authors:
Nona Riley; ARMY AVIATION AND MISSILE COMMAND REDSTONE ARSENAL AL
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| PURPOSE: (1) Performance as a variable in decision risk assessment; (2) Define the relationship of system availability from acquisition development to battlefield consequences; (3) Define the cost risk methodology. |
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| Internal Damage Detection and Assessment in Beams Using Experimental Natural Frequencies |
13 JUN 2005 |
143 pages |
| Authors:
Frances K. Durham; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This study investigated the frequency response of a cantilever beam with the intent of establishing a reliable nondestructive method of damage detection. The test specimens were 12 aluminum 2024 T3 beams, each identical except for a unique, eccentrically located notch, and one reference notchless beam. The machined notches varied in length and location to simulate varying degrees of damage. Laser doppler vibrometry enabled the data acquisition. The changes in natural ... |
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| Superconductors: An Emerging Power Technology |
08 JUN 2005 |
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| Authors:
Jack W. Ekin; NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO
|
| Superconductors offer effectively zero resistance to the flow of electricity and thus have the potential to significantly reduce Joule energy losses in the distribution and utilization of electric power, as well as the size and weight of power generators and motors. Although superconductivity was first discovered in 1911, temperatures near absolute zero were required for their operation, and so large-scale application of superconductivity was limited until the discovery in 1986 ... |
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| A New Flat-Panel Digital Mammography Detector with Avalanche Photoconductor and High-Resolution Field Emitter Readout |
JUN 2005 |
80 pages |
| Authors:
Wei Zhao; STATE UNIV OF NEW YORK AT STONY BROOK RESEARCH FOUNDATION
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| A new concept of flat-panel imager (FPI) with avalanche gain and high resolution (with 50 micron pixel size) is being investigated for improving the imaging performance of digital mammography at low doses and high spatial frequencies, which are critical for the detection of subtle breast abnormalities and the development of digital tomosynthesis. The detector employs an avalanche photoconductor, amorphous selenium (a-Se), called HARP, to detect and amplify the optical signal ... |
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| Information Product Quality in Network Centric Operations |
MAY 2005 |
56 pages |
| Authors:
Patrick J. Driscoll; Michael Tortorella; Edward Pohl; MILITARY ACADEMY WEST POINT NY DEPT OFSYSTEM ENGINEERING
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| This study introduces a pragmatic methodology for examining the effectiveness of decision support information systems for Network Centric Operations based on the concept of manufacturing information products. We first develop the definitions and framework for this manufacturing environment, establishing a connection with previous research and extending it into a value-focused domain. We then apply this framework to elements extracted from two recent case studies involving US Forces focused on validating ... |
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| Performance Evaluation For Modern Radars |
14 APR 2005 |
8 pages |
| Authors:
Andrew G. Stove; David L. Hurd; THALES SENSORS CRAWLEY (UNITED KINGDOM)
|
| Modern radar systems are procured with tight specifications on a large number of different parameters. It is in the interests both of the customer and of the supplier that the procedures used evaluate radar performance are mathematically rigorous, precise and as cost-effective as possible. This paper describes some methods of evaluating the performance of different modes of modern radar systems and discusses the accuracy of which they are capable. The ... |
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| A Performance-Based Technology Assessment Methodology to Support DoD Acquisition |
06 APR 2005 |
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| Authors:
Sherry Mahafza; Paul Componation; Donald Tippett; ARMY SPACE AND MISSILE DEFENSE COMMAND HUNTSVILLE AL
|
| Many weapon system failures are attributed to premature transfer of technology to operational systems. Insufficient measures of assessing technology readiness are major contributors to such failures. This paper presents a methodology to measure the performance risk of technology in order to determine its transition readiness. This methodology is referred to as Technology Performance Risk Index (TPRI). The TPRI can track technology readiness through a life cycle, or it can be ... |
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| Cost and Performance Report Enhanced Biological Attenuation of Aircraft Deicing Fluid Runoff Using Constructed Wetlands |
APR 2005 |
44 pages |
| Authors:
Robert L. Knight; Ronald Clarke; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| During winter months at Department of Defense (DOD) air bases, large amounts of aircraft deicing and anti-icing fluids (ADF) (primarily propylene glycol, ethylene glycol, and various additives) are used to ensure flight safety during certain adverse weather conditions. Standard practices at both military air bases and private airports are to direct deicing effluent to large stabilization ponds, the sanitary storm sewer, vegetated swales, or directly to the environment. The objective ... |
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| A Genetic Algorithm for UAV Routing Integrated with a Parallel Swarm Simulation |
MAR 2005 |
240 pages |
| Authors:
Matthew A. Russell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This research investigation addresses the problem of routing and simulating swarms of UAVs. Sorties are modeled as instantiations of the NP- Complete Vehicle Routing Problem, and this work uses genetic algorithms (GAs) to provide a fast and robust algorithm for a priori and dynamic routing applications. Swarms of UAVs are modeled based on extensions of Reynolds' swarm research and are simulated on a Beowulf cluster as a parallel computing application ... |
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| Microstructural Studies of In-Situ Mesophase Transformation in the Fabrication of Carbon-Carbon Composites |
MAR 2005 |
15 pages |
| Authors:
K. M. Chioujones; W. Ho; B. Fathollahi; P. C. Chau; P. G. Wapner; W. P. Hoffman; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
|
| Injection of a low viscosity, fully transformed mesophase pitch into a fiber preform can be an effective approach to fabrication of advanced, high- performance carbon-carbon (C/C) composites 1. Here, flow-induced microstructures can be stabilized by oxidation such that upon carbonization, the fibrous carbon needles running through the flow channels are retained. Using the injection and stabilization process, one can raise the density of C/C composites to reasonably high levels in ... |
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| Composite Flywheel Development for Energy Storage |
JAN 2005 |
26 pages |
| Authors:
Jerome Tzeng; Ryan Emerson; Paul Moy; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Composite flywheels for energy storage have been proposed and investigated for the past several decades. Successful applications are, however, limited due to the inability to predict the performance, especially the long- term durability. In this investigation, a comprehensive study was proposed with the intent to implement composites in high-performance flywheels. The potential failure mechanism of flywheels constructed with fiber composites was evaluated. Analytical codes for predicting elastic and viscoelastic (long-term) ... |
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| Introduction to the HPCChallenge Benchmark Suite |
13 DEC 2004 |
12 pages |
| Authors:
Jack J. Dongarra; Piotr Luszczek; TENNESSEE UNIV KNOXVILLE
|
| The HPCChallenge suite of benchmarks will examine the performance of HPC architectures using kernels with memory access patterns more challenging than those of the High Performance Linpack (HPL) benchmark used in the Top5OO list. The HPCChallenge suite is being designed to augment the Top5OO list, provide benchmarks that bound the performance of many real applications as a function of memory access characteristics, e.g., spatial and temporal locality, and provide a ... |
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| Harvesting Energy with Hand-Crank Generators to Support Dismounted Soldier Missions |
DEC 2004 |
9 pages |
| Authors:
Weston L. Moyers; H. S. Coombe; Albert Hartman; ARMY COMMUNICATIONS-ELECTRONICS RESEARCH DEVELOPMENT AND ENGINEERING CENTER FORT BELVOIR VA
|
| Dismounted soldier power needs have changed significantly since fielding of the G-67B/G, a portable direct current hand-crank generator. A developmental hand-crank system with the potential for both military and commercial application is under development to meet existing and emerging dismounted soldier power needs. In June 2000, High Tide Associates of Palo Alto, CA submitted a proposal entitled "Manually Cranked Battery Charger" in response to Dual Use Science and Technology (DUS&T) ... |
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| Infrared Cavity Ringdown Spectroscopy of Hydrocarbon Ions and Clusters in Fast Ion Beams |
08 OCT 2004 |
6 pages |
| Authors:
Richard J. Saykally; CALIFORNIA UNIV BERKELEY DEPT OF CHEMISTRY
|
| The objectives of this effort were as follows: (1) extend the technical development of pulsed infrared (IR) cavity ringdown spectroscopy to longer wavelengths and higher spectral resolution; (2) develop its capacity as a general tool for trace gas analysis; and (3) study spectra, structures, hydrogen tunneling dynamics of hydrocarbon ions and complexes of relevance to ion- enhanced combustion processes. High-resolution, pulsed infrared cavity ringdown laser spectroscopy was developed and implemented ... |
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| Cost and Performance Report for Natural Pressure-Driven Passive Bioventing |
OCT 2004 |
43 pages |
| Authors:
Sherrie Larson; Ron Hoeppel; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| This document provides information needed for comparing passive bioventing to conventional bioventing on the basis of performance, installation and operating costs, and implementation issues. The primary demonstration objective was to identify a site where passive bioventing would be successful. The secondary objective was to measure the rate of airflow and radius of oxygen influence as the result of operating a pilot-scale passive bioventing system that consisted of one vent well ... |
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| Developing a Brief Method for the Simultaneous Assessment of Anaerobic and Aerobic Fitness |
OCT 2004 |
5 pages |
| Authors:
Peter Weyand; RICE UNIV HOUSTON TX
|
| The objective of the proposed effort is to develop a brief and accurate method for the simultaneous assessment of anaerobic and aerobic fitness that is practical for both field and laboratory use. We anticipate that a method requiring an assessment period of only a few minutes or less, and two brief, minimally fatiguing efforts is possible. Each subject will undergo established tests to assess their maximal aerobic power and anaerobic ... |
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| Model Testing and Numerical Simulations of Seakeeping Performance for High-Speed Vessels |
OCT 2004 |
|
| Authors:
Allen H. Engle; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD STRUCTURES AND COMPOSITES DIV
|
| Given the need to support the long distance deployment of men and material, the US Navy has been exploring the engineering limits and capabilities of open ocean operation for high-speed ships. Of great concern are the risks associated with: Ship Motions - Human Factors " " " Ship Dynamic Stability and Manoeuvring Ship Dynamic Loads In order to address these risks, an initial assessment of design tools has been be ... |
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| Final Joint Test Protocol JP-P-1-1 for Validation of Alternatives to Lead-Containing Dry Film Lubricants for Antigalling/Antifretting, Antiseizing, and Assembly Aid Applications |
29 SEP 2004 |
96 pages |
| Authors:
John Thomstatter; CONCURRENT TECHNOLOGIES CORP JOHNSTOWN PA
|
| This revision to the Joint Test Report for Validation of Alternatives to Lead-Containing Dry Film Lubricants for Antigalling/Antifretting, Antiseizing, and Assembly Aid Applications includes an additional test requirement for humidity resistance. This requirement was identified by turbine engine original equipment manufacturers based on experience in evaluating water-based dry film lubricants (DFLs) for antigalling/antifretting applications. Exposure of some DFLs to hot, humid conditions has the potential to rehydrate the binder, rendering ... |
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| Time Dissemination and Common View Time Transfer with Galileo: How Accurate Will It Be? |
SEP 2004 |
15 pages |
| Authors:
J. Furthner; A. Moudrak; A. Konovaltsev; J. Hammesfahr; H. Denks; GERMAN AEROSPACE CENTER (DLR) STUTTGART(GERMANY) INST OF COMMUNICATIONS AND NAVIGATION
|
| The future European navigation system Galileo will provide both positioning and timing capabilities to its users in the frame of four basic navigation services. Two of them are of special interest: the Safety-of-Life (SoL) Service that will be associated with certain performance guarantees, and the Open Service that will be provided free of charge. In this paper, we assess the average accuracy of user synchronization to the Galileo system time ... |
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| MCS Zero Age of Data Measurement Techniques |
SEP 2004 |
15 pages |
| Authors:
Gary L. Dieter; Gregory E. Hatten; Jack Taylor; BOEING HOMELAND SECURITY AND SERVICES SCHRIEVER AFB CO
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| Advances in 1999 provided Boeing GPS navigation support contractors the ability to transfer, archive, and manipulate Master Control Station (MCS) kalman filter data. Since then, these data have been reported in the System Performance Measurement and Analysis (SPMA) quarterly report, and used to assess GPS performance through a variety of metrics, including Zero Age of Data error. This error, in part a byproduct of the real-time, predictive nature of the ... |
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| The State of the Art in Amateur Timekeeping |
SEP 2004 |
17 pages |
| Authors:
Tom Van Bank; SYNTONICS LLC SEATTLE WA
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| One might assume precise time metrology is the exclusive domain of national scientific laboratories, military infrastructure, or professional calibration centers. But there are a number of amateurs who in recent years have built home timing labs purely as a hobby, the performance of which now rivals that of some national labs. An even larger number of individuals, perhaps hundreds, own atomic standards and use them to satisfy or fuel their ... |
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| Evaluation of the Safety Performance of Ejection Seat Cushions |
SEP 2004 |
10 pages |
| Authors:
Zhiqing Cheng; Joseph A. Pellenttiere; GENERAL DYNAMICS ADVANCED INFORMATION ENGINEERING SERVICES INC DAYTON OH
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| Several operational and prototype ejection seat cushions were selected for the evaluation of their performance for the prevention and reduction of spinal injuries. The evaluation was performed using impact tests on the vertical deceleration tower, where a cushion was placed between the seat pan and the occupant (a 50th percentile Hybrid III manikin) and was subjected to +Gz impact at 8, 10, and 12 g, respectively. For comparison, tests were ... |
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