| Health Monitoring for Condition-Based Maintenance of a HMMWV using an Instrumented Diagnostic Cleat |
15-Oct-2008 |
|
| Authors:
David Gorsich; David Lamb; Paul Decker; Tiffany DiPetta; Nathanael Yoder; Douglas E Adams; Joseph Gothamy; David Koester; TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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 | Operation & support costs for military weapon systems accounted for approximately 3/5th of the $500B Department of Defense budget in 2006. In an effort to ensure readiness and decrease these costs for ground vehicle fleets, health monitoring technologies are being developed for Condition-Based Maintenance of individual vehicles within a fleet. Dynamics-based health monitoring is used in this work because vibrations are a passive source of response data, which are global ... |
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| Empirical Mode Decomposition Based Features for Diagnosis and Prognostics of Systems |
01-Apr-2008 |
30 pages |
| Authors:
Kenneth Ranney; Hiralal Khatri; Kwok del Tom; Romeo Rosario; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
 | We present a new procedure to generate additional features for system diagnosis. The procedure is based on empirical mode decomposition of measured signals obtained by monitoring the relevant state of a system. This procedure is different from the existing procedures for defining features, which are generally obtained using the statistics of the measured signal, the matched filter outputs, and the wavelet decomposition of measured signals. Features derived by this new ... |
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| Incident Management Mission Diagnostic Method, Version 1.0 |
MAR 2008 |
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| Authors:
Audrey Dorofee; Georgia Killcrece; Robin Ruefle; Mark Zajicek; CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST
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| The Incident Management Mission Diagnostic (IMMD) is a risk-based approach for determining the potential for success of an organization's incident management capability (IMC). This potential for success is based on a finite set of current conditions -- a limited set of key drivers used to estimate the current IMC health relative to a defined benchmark. Decision makers can then determine if the current state of the IMC is acceptable, or ... |
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| Mission Diagnostic Protocol, Version 1.0: A Risk-Based Approach for Assessing the Potential for Success |
MAR 2008 |
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| Authors:
Christopher Alberts; Audrey Dorofee; Lisa Marino; CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST
|
| SEI Mission-Oriented Success Analysis and Improvement Criteria (MOSAIC) is a management approach for establishing and maintaining confidence that objectives will be achieved successfully. It comprises a suite of risk-based methods for assessing and managing complex projects and processes. The Mission Diagnostic Protocol (MDP) is one of the assessments included in MOSAIC. MDP provides a time-efficient means of analyzing the potential for success in complex and uncertain environments and can be ... |
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| Using Structured Knowledge Representation for Context-Sensitive Probabilistic Modeling |
Jan-2008 |
30 pages |
| Authors:
Nikita A Sakhanenko; George F Luger; NEW MEXICO UNIV ALBUQUERQUE DEPT OFCOMPUTER SCIENCE
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| We propose a context-sensitive probabilistic modeling system (COSMOS) that reasons about a complex, dynamic environment through a series of applications of smaller, knowledge-focused models representing contextually relevant information. COSMOS uses a failure-driven architecture to determine whether a context is supported and consequently whether the current model remains applicable. The individual models are specified through sets of structured, hierarchically organized probabilistic logic statements using transfer functions that are then mapped into ... |
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| Developing Collaborative Capacity: A Diagnostic Model |
30-Apr-2007 |
35 pages |
| Authors:
Susan P Hocevar; Eric Jansen; Gail F Thomas; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
|
| Federal Acquisition Reform acknowledges the importance of effective collaboration among participating organizations. However, both research and practical experience have shown that inter-organizational collaboration can be difficult to achieve. This research builds on a model developed by the authors with homeland security organizations that identified enablers and barriers to collaborative capacity. The focus of the current research is to develop a diagnostic mechanism that can be used to improve that capability. ... |
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| PHM Integration with Maintenance and Inventory Management Systems (Preprint) |
NOV 2006 |
14 pages |
| Authors:
Fang Tu; Sudipto Ghoshal; Jianhui Luo; Gautam Biswas; Sankaran Mahadevan; Link Jaw; Kelly R. Navarra; QUALTECH SYSTEMS INC WETHERSFIELD CT
|
| Prognostic techniques are intricately tied to the physics of incipient-fault-to-failure progression, and hence most prognostic research has focused on developing techniques for a range of components such as rotating machinery parts. The research and development of such techniques has relied on the theories of material science, structural mechanics, domain expertise, as well as empirical studies such as accelerated run-to-failure testing. Even after prognostic models have been developed and operationally validated ... |
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| A Diagnostic Approach to Building Collaborative Capacity in an Interagency Context |
25 SEP 2006 |
65 pages |
| Authors:
Gail F. Thomas; Susan P. Hocevar; Erik Jansen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
|
| Federal Acquisition Reform has consistently called for more and better collaboration among participating organizations. Experience shows, however, that inter-organizational collaboration can be difficult at best. Our research focuses on imperatives of successful collaboration and aims to assist organizations in diagnosing their collaborative capacity. Based on prior research with homeland security organizations, we offer a model of inter-organizational collaborative capacity grounded in a systems perspective. We then identify enablers and barriers ... |
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| Diagnostic Indicators for Shipboard Mechanical Systems Using Non-Intrusive Load Monitoring |
01 JUN 2006 |
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| Authors:
Thomas D. McKay; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| This thesis examines the use of Non-intrusive Load Monitoring (NILM) in auxiliary shipboard systems, such as a low pressure air system, to determine the state of equipment in larger connected systems, such as the main propulsion engines. Using data collected on previously installed NILM's at the Naval Surface Warfare Center, Philadelphia DDG-51 Land Based Engineering Site (LBES), major event changes were analyzed and diagnosed using power data collected from the ... |
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| Non-Destructive Measurement Methods (Neutron-, X-ray Radiography, Vibration Diagnostics and Ultrasound) in the Inspection of Helicopter Rotor Blades |
01 APR 2005 |
19 pages |
| Authors:
M. Balasko; G. Endroczi; Gy. Tarnai; I. Veres; Gy. Molnar; E. Svab; ATOMIC ENERGY RESEARCH INST BUDAPEST (HUNGARY)
|
| The experiments regarding structural failures in helicopter rotor blade's composite structures causing water penetrations and bypasses were performed at the Dynamic Radiography Station (DRS) of the Budapest. As well as the structural integrity of repaired region were studied by applying dynamic neutron, X-ray radiographies and vibration diagnostics disclosed were horizontal and vertical primary and secondary percolation by-passes, the pore distribution patterns filled with water. The micro localization of structural failures ... |
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| Quantifying the Impacts of Improvements to Prognostic and Diagnostic Capabilities |
JAN 2005 |
41 pages |
| Authors:
C. R. Cassady; Edward A. Pohl; Jason Honeycutt; Letitia Pohl; Mauricio Carrasco; ARKANSAS UNIV FAYETTEVILLE DEPT OF INDUSTRIAL ENGINEERING
|
| A key challenge faced by U.S. Air Force maintenance personnel is the imperfection of aircraft diagnostic and prognostic capabilities. These imperfections include an inability to pinpoint failed components, the incorrect identification of failed components, and "cannot-duplicate" errors between the flight line and the depot. In addition to lowering morale in maintenance personnel, these imperfections lead to increased delays in returning aircraft mission-capable and excessive requirements for spare parts in the ... |
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| Integration of Diagnostics into Ground Equipment (IDGE) Study |
30 JUL 2004 |
172 pages |
| Authors:
Soundar Kumara; N. Gautam; Dave Hall; Sandeep Purao; Amulya Garga; Barney Grimes; PENNSYLVANIA STATE UNIV STATE COLLEGE PA MARINE CORPS RESEARCH UNIV
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| The objective of this study was to investigate the viability of implementing Integrated Diagnostics incorporating Condition-Based Maintenance (CBM) for Ground Equipment used by the U. S. Marine Corps. The study reviewed the sources of Autonomic Logistics data. the data requirements. the timeliness or required "pull" of such data. its transmission means (in garrison and the field, afloat and ashore), the availability of current or planned logistic systems to receive the ... |
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| Application of Model-Based Reasoning Tools Used to Enhance and Improve Diagnostic Performance to Improve Air Force Maintenance |
JUL 2004 |
44 pages |
| Authors:
Mary Nolan; Gerard Giordano; Brian Gaboda; Al Esser; Gregory deMare; GIORDANO AUTOMATED CORP SPARTA NJ
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| Under this contract initiatives were conducted to improve the sustainment and modernization of the Turbine Engine Monitoring System (TEMS). TEMS is deployed on the A-10 and KC-135 aircraft to monitor engine parameters and provide alerts to ground crew upon the occurrence of Malfunction Transactions (MALTRAN). The TEMS system was designed around 1970's technology, and has numerous sustainment issues because of aging and diminishing manufacturing source (DMS) issues. This program was ... |
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| An Analysis of the Integrated Mechanical Diagnostics Health and Usage Management System on Rotor Track and Balance |
JUN 2004 |
102 pages |
| Authors:
Mark S. Revor; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis is concerned with the operational benefit of the Integrated Mechanical Diagnostics Health and Usage Management Systems (IMD HUMS) rotor track and balance (RTB) functionality. The questions addressed are whether there is a savings in flight hours expended on functional check flights (FCF's) when compared to present practices, if there will there be a reduction in directed maintenance man-hours (DMMH) spent on maintenance related to the rotor system, and ... |
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| Prognostic Enhancements to Diagnostic Systems (PEDS) Applied to Shipboard Power Generation Systems |
JUN 2004 |
10 pages |
| Authors:
Carl S. Byington; Michael J. Roemer; Matthew J. Watson; IMPACT TECHNOLOGIES LLC STATE COLLEGE PA
|
| Numerous advancements have been made in gas turbine health monitoring technologies focused on detection, classification, and prediction of developing machinery faults and performance degradation. Existing monitoring systems such as ICAS (Integrated Condition Assessment System), which is the Navy's program of record and is deployed on many US Navy ships, employ alarm thresholds and event detection using rulebased algorithms. Adding the capability to predict the future condition (prognostics) of a machine ... |
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| Performance of a High Resolution Diagnostic Model for Short Range Mesoscale Wind Forecasts in Complex Terrain |
SEP 2002 |
146 pages |
| Authors:
Shawn G. Gallaher; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This study investigates the feasibility of using a high resolution simple diagnostic model (WOCSS) initialized from a coarser grid full physics prognostic model (COAMPS) to obtain mesoscale winds. This approach using COAMPS 81, 27, and 9 km forecast model soundings to initialize WOCSS at 3 km is compared to COAMPS forecast at 3km horizontal resolution alone. Four case studies were collected during various weather regimes in Central California. Observations were ... |
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| Diagnostic Development for the ElectriCOIL Flow System |
17 JUL 2002 |
7 pages |
| Authors:
J. T. Verdeyen; D. M. King; D. L. Carroll; W. C. Solomon; ILLINOIS UNIV AT URBANA
|
| Detailed studies of mechanisms for producing electrically initiated COIL lasers were previously presented. Results of those studies along with more recent experimental results show that electric excitation is a very complex process that must be investigated with advanced diagnostics. Theoretical studies indicate that fractions of O2(sup 1 delta) may be produced in the discharge that will permit lasing of an ElectriCOIL system. Recent kinetic studies indicate a range of useful ... |
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| Historical Perspective of COIL Diagnostics |
17 JUL 2002 |
14 pages |
| Authors:
Steven J. Davis; PHYSICAL SCIENCES INC ANDOVER MA
|
| In this paper, a history is presented of the development of diagnostic techniques for the chemical oxygen iodine laser (COIL). Several established optically based techniques have been applied to COIL including: visible and near infrared chemiluminescence, resonance absorption and laser induced fluorescence. The history of these developments is traced using the diagnostic methods as the overall theme. In many cases a variant of an established diagnostic was used to probe ... |
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| Embedded Sensor Technology for Solid Rocket Motor Health Monitoring |
JUL 2002 |
47 pages |
| Authors:
Herbert Chelner; MICRON INSTRUMENTS SIMI VALLEY CA
|
| This final report presents the significant progress achieved during this Phase I period. Results from constant load tests indicate that the current build standard of sensor is stable and does not creep when under 90% full-scale tensile load for over eight months. The tests are continuing and the current plan is to continue the trial for at least another four months. Sensors and loggers have been manufactured and delivered and ... |
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| Optimization of CAD System Using Adaptive Simulated Annealing for Digital Mammography |
JUL 2002 |
8 pages |
| Authors:
Xuejun Sun; Wei Qian; UNIVERSITY OF SOUTH FLORIDA TAMPA
|
| Mammography plays an important role in the detection and diagnosis of breast cancer. Although computer-aided detection (CAD) scheme is essential and acts as second opinion for the detection and diagnosis of breast cancer, its performance for SFM is not suitable for clinical trial due to the lack of full optimization for CAD system. In addition, current CAD system is not evaluated on FFDM images. The purpose of this study is ... |
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| A Hybrid Neural Network-Genetic Algorithm Technique for Aircraft Engine Performance Diagnostics |
JUL 2001 |
16 pages |
| Authors:
Takahisa Kobayashi; Donald L. Simon; ARMY RESEARCH LAB CLEVELAND OH*
|
| In this paper, a model-based diagnostic method, which utilizes Neural Networks and Genetic Algorithms, is investigated. Neural networks are applied to estimate the engine internal health, and Genetic Algorithms are applied for sensor bias detection and estimation. This hybrid approach takes advantage of the nonlinear estimation capability provided by neural networks while improving the robustness to measurement uncertainty through the application of Genetic Algorithms. The hybrid diagnostic technique also has ... |
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| Langmuir Probe Measurement Techniques and Data Analysis for LAPPS |
11 JUN 2001 |
17 pages |
| Authors:
D. D. Blackwell; S. G. Walton; D. Leonhardt; R. F. Fernsler; NAVAL RESEARCH LAB WASHINGTON DC
|
| Langmuir probe diagnostics have been applied to an inductively coupled test discharge as part of the diagnostics development effort for the Large Area Plasma Processing System at NRL. The method of calculating electron energy from the EEDF derived from the probe second derivative is compared with more traditional methods of fitting the probe characteristics to a known function assuming a Maxwellian distribution. It is shown that under some circumstances the ... |
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| Health Monitoring and Diagnostics of Ground Combat Vehicle |
2001 |
10 pages |
| Authors:
Elena Bankowski; Christopher Miles; Michael S. Saboe; Peggy Gilbert; ARMY TANK-AUTOMOTIVE COMMAND WARREN MI
|
| The proposed technology is the Dependable Automated Reconfigurable Software (DARTS). The DARTS health and situation control continually tests the processing elements with Probe/Agent technology. Algorithms within the Health & Situation Control assess the health of the processors based on a criticality scoring system that considers mission requirements. Probes launched by the DARTS Controller query processing elements. The probed data is sent to a gauge that has a variable sensitivity or ... |
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| Diagnostic Imaging. Occupational Survey Report (CD-ROM) |
JUL 2000 |
|
| Authors:
Robert Boestler; AIR FORCE OCCUPATIONAL MEASUREMENT SQUADRON RANDOLPH AFB TX
|
| ELECTRONIC FILE CHARACTERISTICS: 14 files; HTML, MS Word, MS PowerPoint. PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 26.8MB. SYSTEMS DETAIL NOTE: IBM-clone PC-compatible. ABSTRACT: This is a report of an occupational survey of the Diagnostic Imaging career ladder, conducted by the Occupational Analysis Flight, Air Force Occupational Measurement Squadron (AFOMS). This report ensures that current data are available for use in guiding the development and evaluation ... |
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| Molecular Diagnostics for the Study of Hypersonic Flows |
APR 2000 |
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| Authors:
F. Grisch; OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES CEDEX (FRANCE) DEPARTEMENT MESURES PHYSIQUES
|
| New laser-based diagnostic techniques offer considerable promise for measurements in hypersonic flows. In this paper , we overview optical techniques such as Rayleigh and Raman scattering, laser-induced fluorescence, electron beam fluorescence, coherent anti-Stokes Raman scattering and diode laser absorption. These methods have unique capabilities for nonintrusive measurements of flowfield parameters such as temperature, density, species concentration and velocity. The applicability of these techniques for the study of hypersonic flows is ... |
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| Launcher Integrated Diagnostics Demonstration |
2000 |
7 pages |
| Authors:
Dente D. Poland; Stuart A. Fogel; R. P. Cole; G. G. Olmsted; JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
|
| This paper presents the results to date of the Launcher Integrated Diagnostics Demonstration (L-IDD), which involves the development of the Launcher Integrated Diagnostics System (L-IDS) that monitors components within the Trident II Launcher Subsystem and estimates their "health." During Phase I of this project, possible monitoring areas were researched, and a prototype L- IDS was developed and tested. During Phase II, the prototype L-IDS was refined and installed on an ... |
|
| Development of Analytical and Environmental Diagnostic Techniques |
29 OCT 1999 |
17 pages |
| Authors:
J. K. Steele; GEO-CENTERS INC NEWTON CENTRE MA
|
| This Final Report is a complication of the publications and presentations generated and/or the accomplishments made per task/project, for the tasks performed in support of the development of analytical and environmental diagnostic techniques during the period of September 1995 - September 1999. The task description of each task/project -- as designated in the Statement of Work -- is included for convenience. ... |
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| Determinants of Diagnostic Follow-Up After Inconclusive Screening Mammography |
OCT 1999 |
10 pages |
| Authors:
Alexis Bakos; JOHNS HOPKINS UNIV BALTIMORE MD
|
| Mammography detects cancer an average of 1.7 years before a woman or her clinician can manually detect it. It is estimated that up to 60% of the women who have an inconclusive mammogram do not return for further medical evaluation, which could possibly detect cancer at an early and possible more treatable stage. Thus, despite the fact that early detection of breast cancer may be life-saving for some women, thousands ... |
|
| 1999 Gordon Research Conference on Laser Diagnostics in Combustion |
09 JUL 1999 |
24 pages |
| Authors:
Jay B. Jeffries; GORDON RESEARCH CONFERENCES INC KINGSTON RI
|
| The tenth Gordon Research Conference on Laser Diagnostics for Combustion was partially supported by this ARO Grant. An extremely successful meeting was held at II Ciocco in Barga Italy, June 20-25, 1999. In addition to the 22 invited oral presentationas, more than 110 contributed posters were presented in four sessions. The meeting was oversubscribed; attendance was limited to 140 participants, and more than 175 applications were received. The Geographical distribution ... |
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| Development of an Automated Laser System for Burn Therapy |
MAY 1998 |
66 pages |
| Authors:
John A. Parrish; MASSACHUSETTS GENERAL HOSPITAL BOSTON
|
| Substantial progress was made in the development of a diagnostic system capable of assessing the extent of burn injury and a laser-based debridement system that rapidly, precisely and bloodlessly removes burn eschar under automatic feedback control. An ICO fluorescence imager was constructed and shown to be successful in assessing burn depths in small and large animals. The distribution of ICG into burns and normal tissue was also studied supporting steps ... |
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| Turbine Engine Diagnostics (TED): A Practical Application of a Diagnostic Expert System |
JAN 1998 |
28 pages |
| Authors:
Holly Ingham; Richard Helfman; Timothy Hanratty; John Dumer; Edmund H. Baur; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Turbine engine diagnostics (TED) is a diagnostic expert system that aids the M1 Abrams' mechanic in finding and fixing problems in the AGT-1500 turbine engine. TED was designed to provide the apprentice mechanic the ability to diagnose and repair the turbine engine like an expert mechanic. This report discusses the reasoning method used in TED, called the procedural reasoning system (PRS), as well as various design considerations throughout the life ... |
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| Computer-Aided Mammography Using Automated Feature Extraction for the Detection and Diagnosis of Breast Cancer |
OCT 1997 |
26 pages |
| Authors:
Joseph Y. Lo; DUKE UNIV MEDICAL CENTER DURHAM NC
|
| The purpose of this project was to improve the diagnosis and treatment of breast cancer by reducing the cost and morbidity of unnecessary biopsies. Although mammography is very sensitive, there are a large number of false-positive biopsies. Of women with radio graphically- suspicious, nonpalpable lesions who are sent to biopsy, only 15 to 34% actually have a malignancy by histologic diagnosis 1,2. The cost ... |
|
| Study of Chlamydia Trachomatis in Military Women; Prevalence, Risk Factors, and a Cost Benefits Analysis of Early Diagnosis and Treatment |
SEP 97 |
45 pages |
| Authors:
Charlotte Gaydos; JOHNS HOPKINS UNIV BALTIMORE MD
|
| This ongoing study used urine LCR to determine the prevalence of and risk factors for chlamydial infections among military females. Three different populations were screened: recruits who were beginning military service, symptomatic patients attending a Troop Medical Clinic (TMC), and asymptomatic women having a PAP test. Urine specimens and questionnaires were collected. Urines I were tested by LCR (Abbott Labs); PAP patients were also tested by cervical culture. In 10,361 ... |
|
| Air Vehicle Diagnostic System: CH-46 Aft Main Transmission Fault Diagnosis-Final Report |
JUN 97 |
130 pages |
| Authors:
K. G. Church; R. R. Kolesar; M. E. Phillips; R. C. Garrido; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The goal of the helicopter drive system condition monitoring component of the Air Vehicle Diagnostic System (AVDS) program is to develop technology that will facilitate transition to 'condition-based maintenance' (CBM) for these components. The specific system requirements as stated in the AVDS Execution Plan are as follows: (1) Detect and classify gearbox faults in real time in flight. (2) Cope with variations between gearboxes. (3) Perform diagnostics in a variety ... |
|
| Morbidity and Mortality Weekly Report. Volume 47. Number RR-1. 1998 Guidelines for Treatment of Sexually Transmitted Diseases |
23 JAN 1997 |
128 pages |
| Authors:
CENTERS FOR DISEASE CONTROL ATLANTA GA
|
| The MMWR series of publications is published by the Epidemiology Program Office, Centers for Disease Control and Prevention (CDC), U.S. Department of Health and Human Services, Atlanta, GA 30333. These guidelines for the treatment of patients who have sexually transmitted diseases (STDs) were developed by CDC staff members after consultation with a group of invited experts who met in Atlanta on February 10-12, 1997. The information in this report updates ... |
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| Advanced Diagnostic Techniques Development for Supersonic and Subsonic Combusting Flowfields |
13 NOV 96 |
72 pages |
| Authors:
L. P. Gross; INNOVATIVE SCIENTIFIC SOLUTIONS INC BEAVERCREEK OH
|
| The goal of this program was to address instrumentation problems associated with studying unsteady supersonic and subsonic combustion flows by extending the Particle Imaging Velocimetry (PIV) technique and developing surface techniques capable of pressure, temperature, and heat transfer measurements. Optical-based non-intrusive instrumentation was designed and demonstrated in the Supersonic Combustion Tunnel at Wright Laboratory. The following tasks were accomplished: (1) Significant improvements in PIV analysis software included a new 2D-FFT ... |
|
| Combat Surgical Ultrasound System and Probes with Multi-Modality Image Fusion for Front Line Surgical Guidance and Telesurgery |
OCT 1996 |
|
| Authors:
David R. Pickrell; TRS CERAMICS INC STATE COLLEGE PA
|
| This TRP-SBIR project addressed the synthesis and characterization of single crystal relaxor ferroelectrics for high performance bio-medical transducers. The ability to grow single crystals of various relaxor-based compositions with specific crystallographic orientations offers piezoelectric, dielectric and electro-mechanical properties not achievable in polycrystalline PZT ceramics. Limitations associated with the multi-domain state of polycrystalline ceramics are eliminated in single crystals. Consequently, these single crystals will exhibit better temperature stability allowing devices to ... |
|
| Tunable Diode Laser Diagnostics for Combustion Species |
FEB 96 |
37 pages |
| Authors:
R. G. Daniel; K. L. McNesby; A. W. Miziolek; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| We report here on work employing tunable diode laser absorption spectrosccpy to characterize premixed, low pressure flames inhibited with halons and halon alternative agents. This characterization is in the form of spatial temperature and species concentration profiles of the flames. We report here the observation of 11 combustion species, including short lived intermediates CF2O and CF3 radical. |
|
| Development and Application of Fluorescent Diagnostics to Fundamental Droplet and Spray Problems |
12 SEP 94 |
11 pages |
| Authors:
Lynn A. Melton; TEXAS UNIV AT DALLAS RICHARDSON DEPT OF CHEMISTRY
|
| This final report describes work carried out under ARO grant DAALO3- 91-G-0033 for the development and application of fluorescent diagnostics to fundamental droplet problems. Particular emphasis has been placed on attempts to understand the heating, evaporation, and internal circulation processes of sub-millimeter droplets. At the University of Texas at Dallas, a new type of exciplex fluorescence thermometer, based on the temperature dependent shift of the exciplex band, has been developed ... |
|
| Feasibility Study of Using Neutron Diagnostics for Turbine Engine Structural Measurements |
FEB 94 |
107 pages |
| Authors:
Dudley Leggett; PRATT AND WHITNEY CANADA INC LONGUEUIL (QUEBEC)
|
| The integrated intensity and the angular position of a Bragg diffraction peak are both related to temperature. A multiphase test program, specifically designed to explore nuclear methods, has determined that strains and temperatures in the static and rotating components of a gas turbine engine can be measured nonintrusively using neutron diffraction techniques. In parallel with these efforts, a study concluded that there are several 'portable' neutron sources that are suitable ... |
|
| Conference of Diagnostic Assessment |
10 NOV 93 |
7 pages |
| Authors:
Paul D. Nichols; Robert L. Brennan; AMERICAN COLL TESTING PROGRAM IOWA CITY IA
|
| In response to the growing need for alternative diagnostic assessments that can help diagnose instruction and training needs so that individuals can achieve basic levels of mastery, a conference was organized that brought together researchers, educators, and policy makers from diverse areas interested in new forms of assessment. The goal of the conference was to educate presenters and the audience on the strengths land limitations of diagnostic assessment. Cognitive diagnosis, ... |
|
| International Symposium on Special Topics in Chemical Propulsion (3rd): Non-Intrusive Combustion Diagnostics Held in Scheveningen, Netherlands on 10-14 May 93 |
14 MAY 93 |
|
| Authors:
PRINS MAURITS LABORATORIUM TNO RIJSWIJK (NETHERLANDS)
|
|
| The Measurement of Electrical Conductivity in Detonating Condensed Explosives |
MAR 93 |
|
| Authors:
Douglas G. Tasker; Richard J. Lee; Paul K. Gustavson; NAVAL SURFACE WARFARE CENTER DAHLGREN DIV VA
|
| The time-resolved measurement of electrical conductivity provides a unique means of studying detonating explosives. The results of a large number of experiments are reported. Two types of experiments were performed; they measured bulk resistance and time-resolved conductivity. Some interesting effects, due to detonation wave instabilities, were observed when the explosives dimensions were close to criticality, i.e., close to failure diameter or thickness. The conductivity profile observed in the aluminized explosive ... |
|
| Novel Chemical and Optical Diagnostic Techniques |
MAR 91 |
451 pages |
| Authors:
Karen P. Crossman; Patricia T. Carver; Scot Reynolds; GEO-CENTERS INC NEWTON CENTRE MA
|
| The tasks performed at NRL in support of Research of Novel Chemical and Optical Diagnostic Techniques are reported in this volume. GEO-CENTERS' support at NRL addressed existing problems in these areas: citric acid hydrazines sampler; photoionization; materials compatibility; electrochemistry; color chemistry for the detection of nitrogen dioxide (NO2); nitrogen dioxide instrument evaluation; coulometric titration method optimization; color chemistry for detection of HC1; as well as additional studies. |
|
| Analysis of the Extent of Completion of Skin Assessments and Documentation of Risk for Skin Breakdown in the Trauma Patient Who Experiences Hypovolemic Shock Requiring Massive Transfusion Resuscitation and Surgical Intervention |
91 |
98 pages |
| Authors:
Maryanne Kolesar; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Analysis of the Extent of Completion of Skin Assessments and Documentation of Risk for Skin Breakdown in the Trauma Patient Who Experiences Hypovolemic Shock Requiring Massive Transfusion Resuscitation and Surgical Intervention. This retrospective random chart audit spanning the years 1985 through 1989 was conducted in a sample of 105 charts of trauma patients. The purpose of this study was to determine the number of charts with documentation of skin assessment ... |
|
| Improving Diagnostics Capabilities Through Enhanced Maintenance Data Collection |
DEC 90 |
|
| Authors:
Robert M. Rolfe; Herbert R. Brown; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA
|
| The study reported in this paper examined primary, large scale DoD maintenance data collection systems to determine if they could or should be modified to enhance the use of information in order to improve diagnostics. The maintenance data collection systems in place, or being implemented, have principally automated previous manual reporting functions. The study concludes that these reporting functions are not intended for improving diagnostics, and furthermore, these systems rarely ... |
|
| Designing a Training Tool for Imaging Mental Models |
NOV 90 |
85 pages |
| Authors:
Christopher J. Dede; Geetha Jayaram; HOUSTON UNIV TX
|
| The training process can be conceptualized as the student acquiring an evolutionary sequence of classification-problem-solving mental models. For example a physician learns (1) classification systems for patient symptoms, diagnostic procedures, diseases, and therapeutic interventions and (2) interrelationships among these classifications (e.g., how to use diagnostic procedures to collect data about a patient's symptoms in order to indentify the disease so that therapeutic measures can be taken. This project developed functional ... |
|
| Development of Laser Spectroscopic Diagnostics to Support Advanced Compound Semiconductor Deposition Techniques |
30 JUL 90 |
|
| Authors:
Joda C. Wormhoudt; AERODYNE RESEARCH INC BILLERICA MA
|
| This program constructed and demonstrated an apparatus for the development of laser diagnostics for the gas phase molecules involved in semiconductor fabrication techniques, particularly the organometallic chemical vapor deposition of compound semiconductors like gallium arsenide. Work in this apparatus, a flow tube with mirrors for long path tunable infrared diode laser absorption and electrodes for a radio frequency glow discharge, culminated in observations designed to assess the importance of arsenic ... |
|
| A Contractor Program Manager's Testability/Diagnostics Guide |
APR 90 |
|
| Authors:
George Neumann; George Barthlenghi; GIORDANO ASSOCIATES INC SPARTA NJ
|
| The military services have been experiencing problems in the adequacy of their weapon systems' diagnostic capabilities. There are available a variety of techniques, procedures, standards, and devices which can be applied to the acquisition of a system's diagnostic capability. However, this type of information appears in a variety of reports, military standards, specifications and other documents. The objective of this guide is to transform such individual and diverse pieces of ... |
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| Joint DoD/Industry Study on Opportunities in Integrated Diagnostics |
JAN 90 |
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| Authors:
Herbert R. Brown; Robert M. Rolfe; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA
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| IDA Paper P-2300, Joint DoD/Industry Study on Opportunities in Integrated Diagnostics, documents a study which identified DoD opportunities in integrated diagnostics. The objectives of the study were to (1) provide a forum to present and discuss advanced industrial and DoD integrated diagnostics applications, (2) establish a consensus on the specific integrated diagnostics applications that have the potential of addressing DoD's systems maintenance problems, and (3) address the research, feasibility, and ... |
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