| Large-Scale Physical Separation of Depleted Uranium from Soil |
Sep 2012 |
45 pages |
| Authors:
Steven L Larson; Victor F Medina; John Ballard; Chris Griggs; Michelle Wynter; David Mackie; Ben King; Catherine Nestler; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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 | Dry physical separation processes were tested at large-pilot scale (1,000 kg soil batches) at Yuma Proving Ground (YPG) to evaluate this technique for removal of depleted uranium (DU) metal from soil. Two sample locations, the Catch Box and the Buried DU Penetrator Test Site (DU Garden) were evaluated. These locations were chosen since previous small-scale testing confirmed that soils from these sites had varied uranium concentration, degrees of weathering, and ... |
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| Determination of Gamma-Prime Site Occupancies in Nickel Superalloys Using Atom Probe Tomography and X-Ray Diffraction (Preprint) |
Aug 2012 |
17 pages |
| Authors:
J Tiley; O Senkov; G Viswanathan; S Nag; R Banerjee; J Hwang; UNIVERSITY OF NORTH TEXAS DENTON
|
| Rene88 samples were investigated using atom probe tomography and x-ray diffraction using a monochromated synchrotron beam with different energy values to determine the preferred site occupancy of various alloying elements within the ordered gamma/ precipitates. Samples were solutionized and cooled at 24 degree C/min with subsequent aging at 760 degrees C. The synchrotron-based x-ray diffraction results indicate that niobium prefers to reside on the aluminum sublattice site of the gamma ... |
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| In-Situ Neutron Diffraction Study of Aging of a Mg-Y-Nd-Zr Alloy (WE43): Effects of Precipitation on Individual Deformation Mechanisms |
Jul 2012 |
9 pages |
| Authors:
S R Agnew; III Polesak F J; B Clausen; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| There is an outstanding question regarding why the age hardening response of Mg alloys is not nearly as good as many competing Al alloys. It has recently been proposed that the effect is due to precipitate geometry, since most commercial Mg alloys form either basal plate-shaped precipitates (e.g. AZ alloys) or c-axis aligned rod-shaped precipitates (e.g. ZK alloys) [1], and these are among the least effective precipitate shapes to obstruct ... |
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| Recapitalization of Amphibious Operation and Lift |
Jun 2012 |
218 pages |
| Authors:
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The aging Whidbey Island and Harpers Ferry class ships, LSD-41 and 49 respectively, comprise just over one third of the amphibious navy. However, a solution to the capability gap created by the loss of these ships is needed to maintain the effectiveness of the amphibious fleet across a broad spectrum of mission areas. This research effort considers future ship designs and fleet architectures to meet the capability gaps left by ... |
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| Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) |
May 2012 |
20 pages |
| Authors:
Nancy Grandy; DEPARTMENT OF DEFENSE WASHINGTON DC
|
| The ability of today s warfighter to command, control, deploy, and sustain forces is adversely impacted by a fragile, aging, and fossil fuel dependent electricity grid, posing a significant threat to national security. The SPIDERS JCTD will address four critical requirements: Protect task critical assets from loss of power due to cyber attack, Integrate renewable and other distributed generation electricity to power task critical assets in times of emergency, Sustain ... |
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| Defense Health Care: Applying Key Management Practices Should Help Achieve Efficiencies within the Military Health System |
Apr 2012 |
48 pages |
| Authors:
GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| According to the Defense Health Board s Task Force on the Future of Military Health Care, rising health care costs result from a multitude of factors that are affecting not only DOD but also health care in general. These factors include greater utilization of health care services, increasingly expensive technology and pharmaceuticals, growing numbers of users, and the aging of the retiree population. Additionally, in 2009, the Defense Business Board ... |
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| Optimizing Marine Corps Maintenance Personnel Conversion to the Joint Strike Fighter |
Mar 2012 |
65 pages |
| Authors:
Yusuf M Matar; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The United States Marine Corps (USMC) is replacing its fixed wing fighter and attack aircraft with the new F-35B Joint Strike Fighter (JSF). The Marines' F-35B will replace three aging aircraft: F/A-18 A+/C/D Hornet, AV-8B Harrier, and EA-6B Prowler. With the retirement of these aircraft, their associated military occupational specialties will become obsolete. The F-35B is an expensive asset, and once it is delivered the USMC wants it to be ... |
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| The Need for the Next Special Operations Forces' Mobility Aircraft |
Mar 2012 |
37 pages |
| Authors:
Joseph K Michalek; HARVARD UNIV CAMBRIDGE MA
|
| The proliferation of threat systems and Anti-Access, Area Denial (A2/AD) strategies make performing special operations forces (SOF) air mobility missions increasingly complicated and limit the capability to defeat air defenses and penetrate into denied airspace. Combined with an aging inventory, ill suited to evading these threats, Air Force Special Operations Command (AFSOC) and the United States Special Operations Command (USSOCOM) must look to technology to defeat the more modern threat ... |
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| Quantitative Evaluation for Two-Dimensional Electromagnetic Propagation in a Dielectric Medium using Markov Chain Monte Carlo Method (Preprint) |
Feb 2012 |
8 pages |
| Authors:
Jeremy S Knopp; Fumio Kojima; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS & MANUFACTURING DIR METALS CERAMICS & NONDESTRUCTIVE EVALUATION DIV/NONDESTRUCTIVE EVALUATION BRANCH
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| The motivation of this work is to quantify the degradation of aging electrical cables. The dielectric material parameter of insulation can be correlated with degradation. In this paper, the forward problem is posed as a microwave nondestructive evaluation (NDE) problem. A 2D finite difference time domain (FDTD) was used to evaluate the forward problem. The inverse problem is solved via a Bayesian approach. The Bayesian formulation describes the solution as ... |
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| Homeland Defense: Continued Actions Needed to Improve Management of Air Sovereignty Alert Operations |
Jan 2012 |
47 pages |
| Authors:
Brian J Lepore; Davi M D Agostino; Joseph Kirschbaum; James D Ashley; Tommy Baril; Mark Braza; Susan C Ditto; Brandon Jones; David F Keefer; Charles W Perdue; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| In the 11 years since September 11, 2001, the U.S. government has put forth extensive efforts to protect the nation's aviation sector and airspace. These efforts include air sovereignty alert (ASA) operations, for which the Air Force provides personnel and fully fueled, fully armed aircraft sitting on constant alert at 18 sites across the United States. In 2009, GAO found shortcomings in the Department of Defense's (DoD) management of ASA ... |
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| The Effect of Elevated Temperature on the Inelastic Deformation Behavior of PMR-15 Solid Polymer |
Jan 2012 |
243 pages |
| Authors:
Chad E Ryther; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| The inelastic deformation behavior of PMR-15 neat resin, a high-temperature thermoset polymer, was investigated at temperatures in the 274-316 deg C range. The experimental program was developed to explore the influence of temperature on tensile loading, relaxation and creep behaviors of PMR-15. The results demonstrate that the mechanical behavior of PMR-15 exhibits a strong dependence on temperature. During strain-controlled tensile loading, the slope of the stress-strain curve in the quasi-elastic ... |
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| Space Situational Awareness CubeSat Concept of Operations |
Dec 2011 |
87 pages |
| Authors:
Tolulope E O'Brien; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The concept of space situational awareness (SSA) is important to preserve manned and unmanned space operations. Traditionally, ground based radar, electro-optical sensors and very limited space-based assets have been used as part of the space surveillance network (SSN) to track orbital debris, inactive and active satellites alike. With the current SSN assets aging and the need for SSA growing, it is important to explore new ways to ensure proper SSA ... |
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| Corrosion and Maintenance Data Sharing (Partage des Donnees de Corrosion et de Maintenance) |
Nov 2011 |
88 pages |
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| The increasing average age of military platforms and greater legislative restriction of maintenance materials that has occurred in the past decade has heavily exacerbated the detrimental effects of corrosion on worthiness and maintenance costs. In order to identify the efficacy of different anticorrosion policies and procedures adopted among the NATO countries, a number of Nations - namely Canada, Germany, Italy, Netherlands, the United Kingdom and the United States - have ... |
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| Shock Sensitivity of PBXN-109 When Containing Different RDX Fills Without and With Aging |
Nov 2011 |
48 pages |
| Authors:
Harold W Sandusky; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
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| The influence of different RDX sources on shock reaction and sensitivity was evaluated for a standard explosive in which Class 1 RDX is both the major and only detonable ingredient. Shock reaction in PBXN-109 with seven different RDX fills - Type I, Type II, and reduced sensitivity - from five producers has been studied in three different gap test arrangements. Only the larger tests indicated differences in sensitivity. Dyno Nobel ... |
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| Demonstration Of A Nanomaterial-Modified Primer For Use In Corrosion-Inhibiting Coating Systems |
Nov 2011 |
127 pages |
| Authors:
Susan A Drozdz; Todd Hawkins; Larry Clark; Michael Surratt; Joshua Kingsley; Karl Palutke; James Dean; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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| Above-ground steel fuel tanks, some as large as 1 million gallons, are the main fuel supply for central energy plants and aviation sup-port throughout the Department of Defense (DoD). These tanks and their associated pipelines are aging and many need remediation before leaks or catastrophic failures occur. This project evaluated an emerging coating technology for steel tanks and implemented the technology at Fort Bragg, NC, on a fuel oil storage ... |
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| Aging and Surveillance Overview |
20 Sep 2011 |
14 pages |
| Authors:
Erik Weber; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| This briefing is about developing aging and surveillance (A&S) technologies. |
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| Mission Assurance Analysis of Theater Ballistic Missile Defense Systems |
SEP 2011 |
60 pages |
| Authors:
Susan R. Olsen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| In today's budget-constrained environment with aging equipment and rapid technology turnover, the commander's requirement to prioritize and justify funding requests has essentially become an exercise in mission assurance. This study addresses the TBMDS mission assurance problem generated from the complexity of the political, organizational and physical/architectural environments. The Mission-Oriented Success Analysis and Improvement Criteria (MOSAIC) management approach provides commanders a framework for mission assurance of TBMDS. This study specifically incorporates ... |
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| Effects of Aging Hardware on Data Quality |
Sep 2011 |
10 pages |
| Authors:
Darren M Hart; Kyle R Jones; SANDIA NATIONAL LABS ALBUQUERQUE NM
|
| For over twenty years broadband seismometers have been used for nuclear explosion monitoring at teleseismic distances. Short period seismometers have also been used to improve resolution at higher frequencies ( 1 Hz) over regional distances. At the time of installation, a calibration process is implemented to determine the proper scale factor between digital counts and ground motion for the seismic subsystem (seismometer and digital waveform recorder). This scale factor is ... |
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| Development of Optimal Strategies for Structural Health Monitoring |
25 Aug 2011 |
5 pages |
| Authors:
Fumio Kojima; KOBE UNIV (JAPAN)
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| A stochastic inverse methodology for NDT arising in electromagnetic imaging has been investigated. Two NDE applications using MCMC approach have been solved at the course of this project. One is in the identification of electromagnetic material parameters and the emphasis is on one-dimensional scattering of a dielectric slab. The other problem is a quantitative evaluation method for aging properties of cable insulation. In the sequel, the achievements for the above ... |
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| Sustaining Air Force Aging Aircraft into the 21st Century |
01 Aug 2011 |
232 pages |
| Authors:
Alan Eckbreth; Charles Saff; Kevin Connolly; Natalie Crawford; Chris Eick; Mark Goorsky; Neil Kacena; David Miller; Robert Schafrik; Douglas Schmidt; SCIENTIFIC ADVISORY BOARD (AIR FORCE) WASHINGTON DC
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| As many of its fleets of legacy aircraft types are kept in service well beyond their planned services lives (sometimes in age, sometimes in usage, sometimes both), the United States Air Force (USAF) faces numerous engineering and resource challenges for the continued, cost-effective sustainment of those aging systems. This report details the recommendations made by the USAF Scientific Advisory Board's Sustaining Aging Aircraft (SAA) Study to best position the Air ... |
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| Maintainability Data Decision Methodology (MDDM) |
Jun 2011 |
23 pages |
| Authors:
Jr Nierwinski John; ARMY MATERIEL SYSTEMS ANALYSIS ACTIVITY ABERDEEN PROVING GROUND MD
|
| Organizations within the U.S. Army [i.e. Communications-Electronics Command (CECOM)] and other government organizations have the need to evaluate Maintenance Manpower requirements for systems (i.e. Power Generators, etc.) where fully developed maintenance data is NOT available. Maintenance Manpower requirements are computed by multiplying an estimated maintenance ratio (man-hours per usage) by a one year wartime usage, which results in a total number of recommended maintenance man-hours. Army organizations need to know ... |
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| Phytoremediation for the Containment and Treatment of Energetic and Propellant Material Releases on Testing and Training Ranges |
Jun 2011 |
169 pages |
| Authors:
Jerald Schnoor; IOWA UNIV IOWA CITY DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
|
| The overall objective of the proposed research is to understand the mechanisms by which toxic energetic compounds, known to be susceptible to biodegradation, are actually detoxified in contaminated subsurface soils at DoD firing ranges by plants native to the site, either by direct uptake and transformation in plant tissues, or by microbial activity in the rhizosphere. The specific objectives of the research are to determine: (1) whether plants significantly improve ... |
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| An Air Force Guide for Effective Meeting Management |
MAY 2011 |
73 pages |
| Authors:
Heather D. Cooley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The C-130 is a tactical airlifter and has been in steady use for decades in austere deployed locations. The inspection program to ensure its sustainment has faced increasing workload requirements due to structural issues related to heavy use and aging materials. The most in-depth inspection is the Programmed Depot Maintenance (PDM) inspection and is accomplished at two Air Logistics Centers (ALCs). In recent years, both centers have experienced increased maintenance ... |
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| Impact of Continuous Competition on Operations and Support Costs |
May 2011 |
90 pages |
| Authors:
Jacques S Gansler; William Lucyshyn; Christopher Vorhis; MARYLAND UNIV COLLEGE PARK CENTER FOR PUBLIC POLICY AND PRIVATE ENTERPRISE
|
| Based on projected federal budget deficits, the Department of Defense can expect continued downward budgetary pressure for the foreseeable future. Necessary spending, such as replacing aging defense systems and providing health care for veterans and their families, makes the DoD s long-term acquisition plans unsustainable. If current spending patterns continue, then cost control, not to mention net budget cuts, will be one of the most difficult challenges facing defense policymakers. ... |
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| Future of Army Water Studies |
May 2011 |
20 pages |
| Authors:
Marc Kodack; ARMY ENVIRONMENTAL POLICY INST ARLINGTON VA
|
| Water Challenges: Energy/water nexus, Balancing supply with demand, Aging infrastructure, Complex water rights issues, Cost versus price imbalance, Water quality degradation. The Army is assessing 30-year water supply and demand for a sample of Army installations. The study was initiated in 2009 at Fort Bliss, TX and Fort Bragg, NC. It is now being applied to 10 domestic and 3 overseas installations. General observations: We need the installation of more ... |
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| Quantifying Excess Hazardous Materials at Hill Air Force Base April 2011 |
May 2011 |
20 pages |
| Authors:
Melissa Cary; AIR FORCE AIR BASE WING (75TH) HILL AFB UT
|
| The issue and disposal of excess expired materials is of significant concern to Hill AFB and impacts many different environmental programs. A team of environmental personnel and UECs visited shops and inventoried the issued and in some cases even nonissued expired materials with scan guns. The UECs expressed concern about the possibility of over-reporting on various compliance reports as a result of having to dispose of excess expired material. While ... |
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| Sipping at the Straw: Planning for Sustainable Water Supplies for U.S. Army Installations |
May 2011 |
19 pages |
| Authors:
Marc Kodack; ARMY ENVIRONMENTAL POLICY INST ARLINGTON VA
|
| Water Challenges: energy/water nexus, balancing supply with demand, aging infrastructure, complex water rights issues, cost versus price imbalance, and water quality degradation. The Army is assessing the 30-year water supply and demand for a sample of Army installations. The study was initiated in 2009 at Fort Bliss, TX and at Fort Bragg, NC. It is now being applied to 10 domestic and 3 overseas installations. General observations: We need the ... |
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| Environmental and Chemical Aging of Fatty-Acid-Based Vinyl Ester Composites |
Apr 2011 |
32 pages |
| Authors:
Steven E Boyd; John J La Scala; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| As part of an ongoing validation effort to replace conventional monolithic materials with composite material structures for proposed U.S. Department of Defense applications, environmental and chemical aging was conducted on selected glass-reinforced vinyl ester matrix composites. The composites consisted of two matrices: commercially available vinyl ester resins with styrene contents greater than 40 weight-percent and more environmentally friendly, sustainable vinyl ester resins with methacrylated fatty acids to replace a significant ... |
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| Corrosion Fatigue and Environmentally Assisted Cracking in Aging Military Vehicles (La fatigue-corrosion et la fissuration en milieu ambiant des vehicules militaires vieillissants) |
MAR 2011 |
434 pages |
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| This AGARDograph provides a comprehensive and updated state-of-the-art on corrosion fatigue and environmentally assisted cracking. The interest of the NATO community in this specific subject can be dated back some decades ago, as shown by the publication of the AGARDograph AG-278 issued in 1985, the AGARD Corrosion Handbook Vol. 1 -- Aircraft Corrosion: Causes and Case Histories, where this issue was also jointly covered with the many other aspects of ... |
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| Zero Nuclear Weapons and Nuclear Security Enterprise Modernization |
Jan 2011 |
14 pages |
| Authors:
D'Anne E Spence; DEPARTMENT OF DEFENSE WASHINGTON DC
|
| Every president since Franklin D. Roosevelt has authorized the production of nuclear weapons, requiring that the U.S. government both understand the nuclear weapons program and establish policy for nuclear weapons employment. Each of these presidents also has reiterated a desire to eliminate or reduce the role of nuclear weapons, only to confront the reality that as long as other countries possess them the United States must maintain a credible nuclear ... |
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| Fiscally Sound Options for a Flawed Tanker Recapitalization Strategy |
Jan 2011 |
13 pages |
| Authors:
Jr Grismer Michaael W; AIR AND SPACE POWER JOURNAL MAXWELL AFB AL
|
| The current US economic crisis brings a national impetus to reduce government deficit spending, an undertaking of great importance; indeed, both the legislative and executive branches have taken immediate action in fiscal year (FY) 2011. This fixation on fiscal responsibility will surely include the previously sacrosanct defense budget, which set record highs and nearly doubled with wartime supplemental defense spending since the terrorist attacks of 11 September 2011.1 With the ... |
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| Towards Modeling the Effects of Lightning Injection on Power MOSFETs |
Oct 2010 |
12 pages |
| Authors:
Sankalita Saha; Jose R Celaya; Bhaskar Saha; Phil Wysocki; Kai F Goebel; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
|
| Power electronics are widely used in critical roles in modern day aircrafts and hence their health management is of great interest. An important part of prognostics and health management of these devices is understanding the effect of high-stress events such as lightning and how they affect their aging. In this paper we present our study and analysis of lightning injection experiments with power MOSFETs in their ON state. We show ... |
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| Towards Prognostics of Power MOSFETs: Accelerated Aging and Precursors of Failure |
Oct 2010 |
11 pages |
| Authors:
Jose R Celaya; Abhinav Saxena; Philip Wysocki; Sankalita Saha; Kai Goebel; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
|
| This paper presents research results dealing with power MOSFETs (metal oxide semiconductor field effect transistor) within the prognostics and health management of electronics. Experimental results are presented for the identification of the on-resistance as a precursor to failure of devices with die-attach degradation as a failure mechanism. Devices are aged under power cycling in order to trigger die-attach damage. In situ measurements of key electrical and thermal parameters are collected ... |
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| Modeling SiO2 Ion Impurities Aging in Insulated Gate Power Devices Under Temperature and Voltage Stress |
Oct 2010 |
11 pages |
| Authors:
Antonio E Ginart; Irfan N Ali; Jose R Celaya; Patrick W Kalgren; Scott D Poll; Michael J Roemer; IMPACT TECHNOLOGIES LLC ROCHESTER NY
|
| This paper presents a formal computational methodology to explain how the oxide in semiconductors degrades over time and the dependence of oxide degradation on voltage and temperature stresses. The effects of aging are modeled and quantified by modification of the gate-source capacitance value. The model output is validated using experimental results of a thermally aged power semiconductor device. |
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| Coast Guard Deepwater Acquisition Programs: Background, Oversight Issues, and Options for Congress |
29 SEP 2010 |
51 pages |
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The term Deepwater refers to a collection of more than a dozen Coast Guard acquisition programs for replacing and modernizing the service's aging fleet of deepwater-capable ships and aircraft. Until April 2007, the Coast Guard pursued these programs as a single, integrated acquisition program that was known as the Integrated Deepwater System (IDS) program or Deepwater program for short. The now-separated Deepwater acquisition programs include plans for, among other things, ... |
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| Probability Based Integration of Structural Health Monitoring into the Aging Aircraft Sustainment Program |
02 AUG 2010 |
9 pages |
| Authors:
Raphael T. Haftka; Fuh-Gwo Yuan; Nam-Ho Kim; FLORIDA UNIV GAINESVILLE
|
| The research focused on improvements in diagnosis and prognosis of crack detection through extensive use of probabilistic techniques. A unique feature of the research is that it identifies the material properties relevant to damage propagation at the same time that it performs diagnosis and prognosis. As such, it has the potential of turning aircraft into flying fatigue laboratories and contributing to substantial improvements in the accuracy of aircraft digital twins. ... |
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| Probability Based Integration of Structural Health Monitoring into the Aging Aircraft Sustainment Program |
02 FEB 2010 |
4 pages |
| Authors:
Raphael T. Haftka; Fuh-Gwo Yuan; Nam-Ho Kim; FLORIDA UNIV GAINESVILLE DEPT OF AEROSPACE ENGINEERING MECHANICS AND ENGINEERING SCIENCE
|
| The research focused on improvements in diagnosis and prognosis of crack detection through extensive use of probabilistic techniques. A unique feature of the research is that it identifies the material properties relevant to damage propagation at the same time that it performs diagnosis and prognosis. As such, it has the potential of turning aircraft into flying fatigue laboratories and contributing to substantial improvements in the accuracy of aircraft digital twins. ... |
|
| Advanced Processing for Biomedical Informatics (APBI) |
Oct 2007 |
6 pages |
| Authors:
Craig D Shriver; HENRY M JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE ROCKVILLE MD
|
| A research consortium including Windber Research Institute (WRI), the US Army Space and Missile Defense Command (USASMDC), the Joyce Murtha Breast Care Center (JMBCC), and the Clinical Breast Care Project (CBCP) Walter Reed Army Medical Center (WRAMC) has been formed to evaluate the use of minimally-invasive methods for screening including mammography, ultrasound, proteomics and genomics, in the serum and breast for early detection of markers for risk of disease or ... |
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| Effect of Simulated Weathering and Aging of TNT in Amended Sandy Loam Soil on Toxicity to the Enchytraeid Worm, Enchytreaeus Crypticus |
MAY 2006 |
45 pages |
| Authors:
Roman G. Kuperman; Ronald T. Checkai; Michael Simini; Carlton T. Phillips; Jan E. Kolakowski; Carl W. Kurnas; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
|
| The U.S. Environmental Protection Agency is developing Ecological Soil Screening Levels (Eco-SSLs) for the ecological risk assessment of contaminants at Superfund sites. Insufficient information for TNT to generate Eco-SSL for soil invertebrates has necessitated standardized toxicity testing to fill the data gap. In these studies, the Enchytraeid Reproduction Test (ISO/16387:2001) was adapted for use with Enchytraeus crypticus. Tests were conducted in Sassafras sandy loam soil, which supports relatively high bioavailability ... |
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| Reengineering and Fast Manufacturing for Impact-Induced Fatigue and Fracture Problems in Aging Aircrafts |
31 JAN 2006 |
40 pages |
| Authors:
Kuang-Hua Chang; Zahed Siddique; OKLAHOMA UNIV NORMAN SCHOOL OF AEROSPACE MECHANICAL AND NUCLEAR ENGINEERING
|
| In this research, a systematic reverse engineering, re-engineering, and fast manufacturing (RRF) process has been developed and validated. Commercial off-the-shelf (COTS) software tools and equipment that support the RRF process have been identified, evaluated, and tested. An integration framework has also been developed and employed to create an RRF testbed. This testbed constructed using COTS software and equipment supports three major engineering tasks: the reverse engineering that supports recovering of ... |
|
| Health Management Issues and Strategy for Air Force Missiles (Technical Paper) |
05 JUL 2005 |
16 pages |
| Authors:
Gregory Ruderman; AIR FORCE RESEARCH LAB EDWARDS AFB CA
|
| As so-called "wooden rounds", which are intended to sit stably in storage for extended periods and then function precisely as desired, at a moment's notice, Air Force missiles would appear to be an ideal application for health monitoring. However, solid rocket motors that serve as the propulsion system for these missiles present a number of unique challenges for the development of integrated vehicle health monitoring systems. Mechanical and chemical complexity, ... |
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| Effects of the Global War on Terrorism on Army Equipment Fleets |
23 JUN 2005 |
26 pages |
| Authors:
David M. Sanders; John Ferguson; Matthew Woodward; ARMY CHIEF OF STAFF WASHINGTON DC PROGRAM ANALYSIS AND EVALUATION
|
| SECDEF, 26 Mar 04: "Typically, the cost of operations is funded with supplemental appropriations. I therefore would like to ensure that, in developing the next supplemental request, we are properly covering the cost of using equipment at higher than expected rates." "...effort is needed to understand more clearly how operations are contributing to greater wear and tear on equipment, and what the implications are for future supplemental appropriation requests. The ... |
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| Mechanical Behavior of Cracked Panels Repaired with Bonded Composite Patch |
JUN 2005 |
113 pages |
| Authors:
Michael A. Hansen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research focuses on investigating the mechanical behavior of cracked aluminum panels repaired with bonded boron/epoxy composite patches. The effects of crack initiation and growth on the residual strength of the repaired panels are characterized. This research establishes a correlation between damage modes, residual strength and evolution of strain within as well as outside the patch. Monotonic tensile tests on specimens with a perfectly bonded patch were used to determine ... |
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| Broad Spectrum Chemotherapy: A Novel Approach Using Beta-Galactosidase Activated Pro-Drugs |
MAR 2005 |
21 pages |
| Authors:
Zenyi Ma; TEXAS UNIV AT DALLAS SOUTHWESTERN MEDICAL CENTER
|
| Prostate cancer is one of the most common malignant tumors with increasing incidence rates in the aging male, presenting a formidable public health problem. Gene therapy has been successfully exploited in several clinical trials. beta-galactosidase(beta-gal) as a reporter gene, has historically been the most popular gene for molecular biology work. A series expression lacZ gene vector was developed and two kinds of prostate cancer cells were screened by histology (X-Galstaining) ... |
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| Environmental Durability Trial of Bonded Composite Repairs to Metallic Aircraft Structure |
FEB 2005 |
|
| Authors:
Andrew Rider; Ian Williams; Ed Shum; Leo Mirabella; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
|
 | An agreement between DSTO and the US Air Force Research Laboratory (AFRL) was established as a part of a larger Aging Aircraft Project Agreement (PA). As a part of this agreement a large experimental program was organised to examine the long-term environmental durability of bonded composite repairs to metallic aircraft structure. An important aspect of the program was to examine the reliability and performance of current or recently developed surface ... |
|
| Investigating the High-Rate Discharge Capability of 18650-Type Li-Ion Cells |
15 JUN 2003 |
29 pages |
| Authors:
S. Eftekharzadeh; M. L. Wasz; AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
|
| The high-rate discharge capability of 18650-type lithium-ion cells has been investigated using two commercial cells from Canon battery (A&TB Cells) and Sony, and one space-grade lithium-ion cell. All cells exhibit good voltage stability at various states of charge during pulse application, with Canon (A&TB) cells having the largest drop in voltage. These Canon (A&TB) cells also show the greatest sensitivity to aging with respect to pulse performance, exhibiting irregular voltage ... |
|
| Evaluation of Runway Preservation System |
MAR 2003 |
29 pages |
| Authors:
James E. Shoenberger; J. K. Newman; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
|
| The U.S. Air Force has a large number of bituminous airfield pavements A major concern is increased susceptibility to raveling under traffic as the pavements age. Relative to this is the instance where a seldom-used airfield pavement suddenly receives an increase in traffic as the result of a change in mission requirements Therefore, a material that could be easily and economically applied to aged pavement surfaces, to hold the existing ... |
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| Postural Stability in Pilots Under Vestibular Stress - A Comparative Look at Pilot Candidates Versus Experienced Jet-Aircrews |
FEB 2003 |
5 pages |
| Authors:
B. Brix; H. Pongratz; GERMAN AIR FORCE INST OF AVIATION MEDICINE FURSTENFELDBRUCK (GERMANY)
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| All Air Forces battle the lack of sufficient recruitment of pilot and aircrew candidates. One way to solve the problem is to look into extending the flying career of an individual. German regulations require jet aircrew members except those in commanders' positions - to stop flying at the age of 41 and leave the Bundeswehr to pursue a civilian career. This means the loss of experienced aircrews not because of ... |
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| Fatigue 2002 Conference |
31 DEC 2002 |
11 pages |
| Authors:
Robert P. Wei; LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS
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| This report highlights the proceedings of the Special Topic Session on "Life-Cycle Management of Aging Aircraft" that was held as a part of Fatigue 2002 in Stockholm, Sweden, 2-7 June 2002. Fatigue 2002 is the 8th in the series of International Fatigue Congresses which began in Stockholm in 1981 and are recognized as the pre-eminent world conference in the field of fatigue. |
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| Contribution of the Receptor/Ligand Interaction Between CD44 and Osteopontin to Formation of Breast Cancer Metastases |
JUL 2002 |
161 pages |
| Authors:
Georg F. Weber; TUFTS-NEW ENGLAND MEDICAL CENTER BOSTONMA
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| Cancer is characterized by dysregulated growth control, overcoming of cellular aging, and metastasis formation. The latter distinguishes malignant tumors from benign tumors and is mediated by groups of molecules called homing receptors, cytokines, and proteinases. Expression of these molecules on tumor cells determines when and where particular types of cancer spread. The physiologic role of the relevant receptors, cytokines, and proteases in the healthy, cancer-free organism has been incompletely understood. ... |
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Reports by Keyword(s)
AGING(MATERIALS)
