| Evaluation of Small Arms Range Soils for Metal Contamination and Lead Bioavailability |
03-Nov-2009 |
7 pages |
| Authors:
Desmond I Bannon; John W Drexler; Genevieve M Fent; Stan W Casteel; Penelope J Hunter; William J Brattin; Michael A Major; ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE ABERDEEN PROVING GROUND MD
|
 | Although small arms ranges are known to be contaminated with lead, the full extent of metal contamination has not been described, nor has the oral bioavailability of lead in these soils. In this work, soil samples from ranges with diverse geochemical backgrounds were sieved to 250 microns and analyzed for total metal content. Soils had consistently high levels of lead and copper, ranging from 4549 to 24,484 micrograms/g and 223 ... |
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| Functionally Graded Adhesives |
Nov-2009 |
22 pages |
| Authors:
John J Scala; Christopher B Stabler; Faye R La Toulan; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The goal of this project was to increase rubber to metal adhesion in Army materials using the concept of functionally graded interfaces as observed in squid beaks. Through application of adhesive as a graded interface with layers of varying rigidity, exceptional adhesion can be accomplished. 3M Scotch-Weld 847 was chosen as the adhesive because of its flexibility, potential for use on Army weapons platforms, and because it contains no hazardous ... |
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| Doubly Curved Composite Sandwich Panels for Hybrid Composite/Metal Ship Structures |
15-Aug-2009 |
47 pages |
| Authors:
Vincent Caccese; Joachim L Grenestedt; Andrew Truxel; LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS
|
| Doubly curved composite sandwich panels loaded by evenly distributed pressure were designed, analyzed, manufactured and tested. Quick and cost effective methods for making molds for vacuum infused doubly curved composites were studied and implemented. Several different manufacturing techniques for making doubly curved panels and doubly curved foam cores were investigated. Tests were performed using a hydrostatic water tank. |
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| Defense Logistics: Information on the Test and Evaluation and Assignment and Cancellation of National Stock Numbers as It Relates to MILITEC-1 |
25-Jun-2009 |
25 pages |
| Authors:
GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| The purpose of this letter is to respond to your request for information regarding the test and evaluation process conducted by the Department of Defense (DOD) of a specific synthetic lubricant called MILITEC-1 that is produced by Militec, Inc., and the assignment and cancellation of national stock numbers (NSN) associated with that product. Militec, Inc., has challenged DOD decisions not to include MILITEC-1 in the federal supply system. Specifically, we ... |
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| Hand Grenade Residuals (Environmental Security Technology Certification Program) |
Jun-2009 |
31 pages |
| Authors:
Steven L Larson; W A Martin; Deborah R Felt; Jeffrey L Davis; Catherine C Nestier; Gene L Fabian; Gregory O'Connor; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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| The Department of Defense operates hundreds of hand grenade ranges for training purposes. The majority of hand grenades used at fixed position ranges are fragmentation grenades that are typically composed of a steel shell and composition B explosive material. Measurable explosive levels have been observed in hand grenade range soils at levels in the low parts per billion up to percent levels. Previous attempts to measure hand grenade residues have ... |
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| Second Generation Organometallic Materials for Non-Linear Optical Application |
26-May-2009 |
18 pages |
| Authors:
Kirk S Schanze; FLORIDA UNIV GAINESVILLE
|
| The primary focus of this program was to synthesize pi-conjugated oligomers that feature high cross section two-photon absorbing (TPA) chromophores combined with transition metal centers. The TPA chromophores imbue the oligomers with high cross sections for two-photon absorption, whereas the metal centers provide for efficient production of long-lifetime, strongly absorbing triplet excited states. Because of the strong absorption of the triplet excited states, the materials display reverse saturable absorption (RSA). ... |
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| Emergence of Dissipative Structures in Current-Carrying Superconducting Wires (Postprint) |
26-May-2009 |
13 pages |
| Authors:
G A Levin; P N Barnes; J S Bulmer; J P Rodriguez; J A Connors; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| We discuss the emergence of a spontaneous temperature and critical current spatial modulation in current-carrying high-temperature superconducting wire. The modulation of the critical current along the wire on a scale of 3-10 mm forces a fraction of the transport current to crisscross the resistive interface between the superconducting film and normal metal stabilizer attached to it. This generates additional heat that allows such structure to be self-sustainable. Stability and the ... |
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| An Extensive X-ray Computed Tomography Evaluation of a Fully Penetrated Encapsulated SiC MMC Ballistic Panel |
Apr-2009 |
20 pages |
| Authors:
William H Green; Robert H Carter; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| X-ray computed tomography (XCT) is an important nondestructive evaluation technique for revealing the spatial distribution of ballistically induced damage in ceramics. The level of detection and resolution of damage depends on the size of the sample and the parameters of the XCT approach (e.g., focal spot size, magnification, etc.). Previous and ongoing work in this area includes assessment of ballistically induced damage in both individual ceramic targets and ceramic armor ... |
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| Moisture-Induced Delayed Alumina Scale Spallation on a Ni(Pt)Al Coating (Preprint) |
Apr-2009 |
32 pages |
| Authors:
James L Smialek; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH GLENN RESEARCH CENTER
|
| Delayed scale failure was examined for samples of a Ni(Pt)Al-coated CMSX4 single crystal superalloy, cyclically oxidized at 1150 degrees C for 2000 hr. One sample exhibited accentuated coating grain boundary wrinkling, initiating local alumina scale spallation to bare metal, resulting in a final weight loss of 3.3 milligrams/(square centimeter). Spallation under ambient conditions was monitored with time after cooldown and was found to continue for times up to 24 hr, ... |
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| Center of Excellence for Individualization of Therapy for Breast Cancer |
Apr-2009 |
43 pages |
| Authors:
George W Sledge; INDIANA UNIV-PURDUE UNIV AT INDIANAPOLIS
|
| We have been waiting for the group to accumulate at least 20 serum samples from each of the patient sets we decided would benefit from a proteomic analysis. We revised this approach during the March meeting, since the collection process has been going very slowly. During the meeting, we decided to begin a somewhat different series of analyses, in which we would look at the baseline proteomic signatures for all ... |
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| Study of Load Transfer and Fracture on Composite-to-Metal-Wire Joints |
01-Mar-2009 |
60 pages |
| Authors:
Mark F Boseman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In order to connect a composite structure to a metallic structure, a hybrid composite/metal-wire laminate has been considered. Such a hybrid laminate raises a question of interface strength between the composite layer and metal-wire layer, and what kind of lay-up configuration would be the best. In order to answer the question, the following three joints were considered: butt joint, overlap joint, and modified-wire-end-shape joint. The goal of this research was ... |
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| Corrosion Inhibiting Chromate-Free Nanocomposite Pretreatments and Nanoparticle Primer Additives for Structural Metals |
05-Feb-2009 |
26 pages |
| Authors:
Fred Allen; NEI CORP SOMERSET NJ
|
| NEI Corporation Spins Out American NanoMyte (Formerly NEI Corrosion Technologies): Experience in developing, manufacturing and distributing nanoscale materials for a broad range of customers around the world * Expertise in nanoparticle synthesis, surface modification and coatings, and nanotechnology-based formulations * Nanomyte line of products, developed by creating nanostructures and modifying them through novel chemistry, fall into two broad categories: ADDITIVES -- Nanomaterials tailored to meet the specific performance and manufacturing ... |
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| Next Generation Coatings |
04-Feb-2009 |
21 pages |
| Authors:
Terrence R Giles; HENKEL ADHESIVE TECHNOLOGIES DUSSELDORF (GERMANY)
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| NEXT GENERATION COATINGS - BENEFITS SUMMARY: No heat required - cuts energy costs! Significantly reduce inner-stage rusting - improve adhesion and reduce reject rates! Less reaction with metal surface - generate very little sludge! Shorter treatment time - increase production throughput! No post treatment required - decrease chemical handling and costs! No hazardous waste disposal - reduce labor/chemical costs! Performance - Meeting Industry Specifications! |
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| Manganese Research Health Project (MHRP) |
Feb-2009 |
146 pages |
| Authors:
Michael Aschner; Vanesssa A Fitsanakis; VANDERBILT UNIV NASHVILLE TN
|
| Manganese (Mn) and iron are essential metals for normal growth and development that compete for and share the same transporters. Thus, during periods of low dietary iron intake, the transport and deposition of Mn in the brain are increased. Conversely, high-risk populations for Mn intoxication, namely Mn miners and welders, may benefit from iron supplementation, which may lower their central nervous system (CNS) Mn burden. For the first 3 years, ... |
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| Magnesium Technology and Manufacturing for Ultra Lightweight Armored Ground Vehicles |
Feb-2009 |
14 pages |
| Authors:
Kyu Cho; Paul Moy; Tomoko Sano; Kevin Doherty; Chian Yen; George Gazonas; Jonathan Montgomery; Bruce Davis; Rick DeLorme; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The current paper summarizes magnesium alloy metallurgy and wrought manufacturing with an initial emphasis on the Elektron WE43 alloy system for lightweight armored ground vehicle applications. Engineering design factors are reviewed and initial mechanical property data are presented along with ballistic results and findings from blast simulations. Finally the future role of magnesium alloys in ultra light metallic armor is discussed in terms of material development and application. |
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| Development of a Multi-Scale Methodology for Prediction of the Microscopic Anisotropic Stress-Strain Response of Textured Metals under Dynamic Loading |
21-Jan-2009 |
69 pages |
| Authors:
Oana Cazacu; FLORIDA UNIV SHALIMAR DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| This report documents a comprehensive experimental and theoretical investigation of the deformation behavior of high-purity, polycrystalline alpha-titanium. A series of monotonic uniaxial compression and tension tests were carried out at room temperature under quasi-static conditions to quantify the plastic anisotropy and the tension-compression asymmetry of this material. The evolution of microstructure and texture during deformation was studied using optical image microscopy (OIM) and neutron-diffraction techniques to elucidate the role of ... |
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| Initial Development of Composite Repair Resins With Low Hazardous Air Pollutant Contents |
Dec-2008 |
32 pages |
| Authors:
James M Sands; John J LaScala; Scott Bingham; Kevin S Andrews; Guiseppe R Palmese; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Unsaturated polyester-based repair resins, such a Bondo, are widely used for automotive repair, marine repair, sporting equipment repair, and household repair of metal, composites, plastics, and wood. Commercial repair resins usually contain 10 to 40 weight-percent styrene, which is a hazardous air pollutant (HAP). Reducing HAPs in Army materials has become a high priority because of Environmental Protection Agency regulations, including the Defense Land Systems for Miscellaneous Equipment National Emissions ... |
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| Generic Design Procedures for the Repair of Acoustically Damaged Panels |
Dec-2008 |
|
| Authors:
R J Callinan; C H Wang; S Sanderson; S C Galea; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
|
 | Acoustic fatigue is the result of high frequency lateral vibration of an aircraft panel due to time varying pressure waves caused by engine and/or aerodynamic effects. For example, acoustically induced cracks have been recorded in the lower external surface of the nacelle skin of the F/A-18 aircraft and aft fuselage. In the case of the inlet nacelle overall sound pressure levels of the order of 172 dB have been recorded. ... |
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| Air-Activated Ration Heaters |
Dec-2008 |
7 pages |
| Authors:
Paul DellaRocca; Ramesh Kainthla; Charles Sesock; Lawrence Tinker; ARMY NATICK SOLDIER RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
|
| The current Mg-Fe flameless heater is based on the accelerated corrosive oxidation of magnesium resulting from dissimilar metals placed in contact with an electrolyte1,2. Water is used to activate the heater, and hydrogen is released as a by-product. RBC Technologies (RBC) and the Natick Soldier RDEC have developed a flameless heater technology based on the direct oxidation of a metal in air. The new heater technology requires no additional reactants, ... |
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| Mobility, Geochemistry, and Speciation of Tungsten |
Dec-2008 |
8 pages |
| Authors:
A J Bednar; W T Jones; R E Boyd; R A Kirgan; M A Chappell; J L Clausen; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
| Tungsten metal is used in many industrial, military, and consumer applications, and interest in its biogeochemistry is increasing partially due to its potential mobility and biological effects. Recent studies have investigated the geochemistry of tungsten from the laboratory to field scale, to determine its mobility and toxicity. Tungsten exists in most environmental matrices as the soluble and mobile tungstate anion, although polymerization to form poly- and heteropoly- tungstates has been ... |
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| Fabrication of High Strength Metal-Carbon Nanotube Composites |
Dec-2008 |
6 pages |
| Authors:
D A Wiegand; F J Owens; A Goyal; Z Iqbal; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ
|
| A major objective of Army technology is the development of lighter and stronger platforms such as armored vehicles for Future Combat systems and Future Force. Here we show that carbon nanotubes could be the basis of such a possibility. It is shown for the first time that a carbon nanotube-iron composite, iron being the principle component of steel, has significantly enhanced mechanical strength. The major challenge has been to develop ... |
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| Direct Fabrication of a-Si:H Thin Film Transistor Arrays on Plastic and Metal Foils for Flexible Displays |
Dec-2008 |
6 pages |
| Authors:
S M O'Rourke; D C Morton; G B Raupp; N Colaneri; J Haq; S M Venugopal; D R Allee; J P Kaminski; R Naujokaitis; J Dailey; D Bottesch; M Marrs; B P O'Brien; S K Ageno; E J Bawolek; C Moyer; D E Loy; E W Forsythe; ARIZONA STATE UNIV TEMPE
|
| In this paper we describe solutions to address critical challenges in direct fabrication of amorphous silicon thin film transistor (TFTs) arrays for high information content active matrix flexible displays for Army applications. For all flexible substrates a manufacturable handling protocol in automated display-scale equipment is required. For metal foil substrates the principal challenges are planarization and electrical isolation, and management of coefficient of thermal expansion induced stress (CTE mismatch) during ... |
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| Bulk Nanocomposites Produced by Thermally Activated Severe Plastic Deformation |
Dec-2008 |
9 pages |
| Authors:
J Jr; S Zhang; J Bai; K Shue; X Wu; Y Liu; L Dauerman; Mabesa; M3TECHCENTER LLC CANTON MI
|
| In this paper, several versions of extrusion processes were used to provide severe plastic deformation for grain refinement (with a modified ECAE extrusion) and for grain/fiber alignment (with straight extrusion). The process was performed at elevated temperatures to reduce extrusion pressure, and in order to increase strength and avoid grain growth secondary phases were added or in-situ formed. In addition, this study also attempts to develop a one-step material synthesis ... |
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| Evaluation of the Snap Sampler for Sampling Ground Water Monitoring Wells for Inorganic Analytes |
Dec-2008 |
74 pages |
| Authors:
Louise V Parker; Nathan D Mulherin; Gordon E Gooch; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
| Abstract: Laboratory studies and a field demonstration were conducted to determine the ability of the Snap Sampler to recover representative concentrations of inorganic analytes, including metals, from ground water. For the laboratory studies, concentrations of analytes in Snap Sampler samples were compared with concentrations of the analytes in samples collected from a standpipe (i.e., control samples). These studies clearly demonstrated that Snap Sampler concentrations were comparable to control sample concentrations. ... |
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| Minerals Price Increases and Volatility: Causes and Consequences |
03-Oct-2008 |
|
| Authors:
Stephen Cooney; Dick K Nanto; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| A rise in the prices of minerals has had a major impact on U.S. manufacturers and consumers. Mineral prices have risen while the economy as a whole has entered a period of slowing growth. This has created serious difficulties for consuming industries and concern in Congress. This report reviews the increases in price across a wide range of metals commodities. Prices have at least nearly doubled between 2001 and 2008. ... |
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| Plasticity of Micrometer-Scale Single-Crystals in Compression: A Critical Review (PREPRINT) |
Oct-2008 |
37 pages |
| Authors:
Michael D Uchic; Paul A Shade; Dennis M Dimiduk; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| This review examines the recent literature that has focused on uniaxial compression experiments of single crystals at the micrometer-scale. Collectively, the studies discovered new regimes of plastic flow that are size-scale dependent and that occur in the absence of strong strain gradients. However, the quantitative comparison of the flow curves between independent studies is hampered by differences in the particular implementations of the testing methodology. Two schools of thought have ... |
|
| Rapid Sediment Characterization Tools |
01-Sep-2008 |
45 pages |
| Authors:
V J Kirtay; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| This guide provides information about several of the rapid sediment characterization technologies that can be used at marine sediment sites, including common techniques such as X-ray fluorescence for metals, immunoassays for polycyclic aromatic hydrocarbons and polychlorinated biphenyls, QwikSed bioassay for assessing toxicity, and other more specialized techniques. Examples are provided to illustrate the efficacy of applying rapid sediment characterization tools for a broad range of applications, including remedial investigations/feasibility studies, ... |
|
| Low Impact Technologies to Reduce Pollution from Storm Water Runoff SI-200405 |
Sep-2008 |
155 pages |
| Authors:
Gary D Anguiano; Mark Foreman; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| This project was to validate the performance of a dual media filtration system that removes metals, organic compounds, and sediment found in storm water runoff from DoD industrial sites. Full-scale demonstrations were conducted at the Navy Regional Recycling Center (NRRC) in San Diego, California and the Anniston Army Depot (ANAD) in Anniston, Alabama. The specific performance goal at NRRC was to meet the NPDES storm water permit by passing acute ... |
|
| Cost and Performance Report Low Impact Technologies to Reduce Pollution from Storm Water Runoff SI-200405 |
Sep-2008 |
63 pages |
| Authors:
Gary D Anguiano; Mark Foreman; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| This project was to validate the performance of a dual media filtration system that removes metals, organic compounds, and sediment found in storm water runoff from DoD industrial sites. Full-scale demonstrations were conducted at the Navy Regional Recycling Center (NRRC) in San Diego, CA and the Anniston Army Dept (ANAD) in Anniston, Alabama. The specific performance goal at NRRC was to meet the NPDES storm water permit by passing acute ... |
|
| Novel Pharmacological Approaches for Treatment of Neurotoxicity Induced by Chronic Exposure to Depleted Uranium |
Sep-2008 |
7 pages |
| Authors:
Stephen M Lasley; ILLINOIS UNIV AT CHICAGO
|
| The chemical properties and high density of depleted uranium (DU) render the metal well suited for military purposes, but knowledge of DU neurotoxicity and its treatment is lacking. This project is designed to test the hypothesis that long-term administration of a free radical trapping agent and/or an NMDA receptor antagonist will reduce neurotoxicity resulting from chronic exposure to DU. This hypothesis is consistent with previous observations ensuing from chronic intramuscular ... |
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| Electroluminescence Efficiency Enhancement using Metal Nanoparticles |
22-Jun-2008 |
4 pages |
| Authors:
Richard A Soref; J B Khurgin; G Sun; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
|
| We apply the "effective mode volume" theory to evaluate enhancement of the electroluminescence efficiency of semiconductor emitters placed in the vicinity of isolated metal nanoparticles and their arrays. Using the example of an InGaN/GaN quantum-well active region positioned in close proximity to Ag nanospheres, we show that while the enhancement due to isolated metal nanoparticles is large, only modest enhancement can be obtained with ordered array of those particles. We ... |
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| A Preliminary Model for Correlation of Plasmon Resonance Spectra with Adherence Properties of Corrosion Inhibitors, VpCI-415 |
May-2008 |
8 pages |
| Authors:
S G Lambrakos; P P Trzaskoma-Paulette; N Tran; NAVAL RESEARCH LAB WASHINGTON DC MATERIAL SCIENCE AND TECHNOLOGY DIV
|
| Recent studies have shown that there is correlation between the effectiveness of additives containing corrosion inhibitors and surface plasmon resonance (SPR) spectra. In principle, SPR spectroscopy is a valuable tool to examine metal-inhibitor association because it is specifically sensitive to interface structure or electrochemical processes at a metal surface due to contact with water or an electrolyte solution. In this paper we present a preliminary design of a fiber-optic sensor ... |
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| The Berry Amendment: Requiring Defense Procurement to Come from Domestic Sources |
30 APR 2008 |
|
| Authors:
Valerie B. Grasso; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| To protect the U.S. industrial base during periods of adversity and war, Congress passed domestic source restrictions as part of the 1941 Fifth Supplemental Department of Defense (DoD) Appropriations Act; these provisions later became the Berry Amendment. The Berry Amendment requires DoD to give preference in procurement to domestically produced, manufactured, or home-grown products, notably food, clothing, fabrics, and specialty metals. The Berry Amendment (Title 10 U.S.C. Section 2533a) contains ... |
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| Synthesis of Metal Nanoclusters Doped in Porous Materials as Photocatalysts |
10-Apr-2008 |
18 pages |
| Authors:
Sofian M Kanan; AMERICAN UNIV OF SHARJAH (UNITED ARAB EMIRATES) DEPT OF CHEMISTRY
|
| This report results from a contract tasking American University of Sharjah as follows: To achieve the goals of the project, three major tasks will be performed: 1.) The development of nanoclusters embedded in zeolites as potential photocatalysts. 2.) Identify conditions for optimum synthesis of nano-sized tungsten oxide (WO3) based materials. We will investigate synthetic sol-gel strategies for incorporating mixed metal into the WO3 framework. 3.) Surface analysis and catalytic studies. ... |
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| Effects of Electronic Quantum Interference, Photonic-Crystal Cavity, Longitudinal Field and Surface-Plasmon- Polariton for Optical Amplification |
09-Apr-2008 |
15 pages |
| Authors:
Danhong Huang; D A Cardimona; Paul M Alsing; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
|
| Some possibilities for coherent optical amplification of a normally-incident and weak radiation field are reviewed based on various physical mechanisms, such as electronic quantum interference induced by a coupling laser field in a three-level system, field enhancement through the cavity confinement of a radiation field in a photonic crystal and field concentration seen in a transmitted near field through a metallic surface grating due to excitation of surface-plasmon-polariton modes. Numerical ... |
|
| Demonstration of Airborne Wide Area Assessment Technologies at Kirtland Precision Bombing Range, New Mexico |
01-Apr-2008 |
58 pages |
| Authors:
ENVIRONMENTAL SECURITY TECHNOLOGY CERTIFICATION PROGRAM OFFICE (DOD) ARLINGTON VA
|
| The former Kirtland Precision Bombing Range is located near Albuquerque, New Mexico. This site is classified by the United States Government as a Formerly Used Defense Site (FUDS) and was a World War II-era military training facility. This demonstration utilized Helicopter Multi-sensor Towed Array Detection System (MTADS) Magnetometry (HeliMag) technology, a wide area assessment technology. A data collection survey was conducted in October of 2005 and resulted in the survey ... |
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| Analysis of Multi-Layered Materials Under High Velocity Impact Using CTH |
01-Mar-2008 |
198 pages |
| Authors:
Jason K Lee; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Multi-layer armor containing ceramic and metallic layers has become more common in the past two decades. Typically, ceramics have high compressive strength; that feature combined with their low density make them highly desirable for armor applications. This research effort numerically simulates ballistic impact of a cylindrical penetrator with a hemispherical tip on multi-layer metallic and ceramic targets of finite thickness. The projectile is made of S7 tool steel, while the ... |
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| Catalysis by Nanostructures: Methane, Ethylene Oxide, and Propylene Oxide Synthesis on Ag, Cu or Au Nanoclusters |
07 FEB 2008 |
10 pages |
| Authors:
Horia Metiu; CALIFORNIA UNIV SANTA BARBARA
|
| The principal investigators have developed new and innovative methods for the preparation of catalytic systems consisting of very small metal clusters supported on an oxide and for the preparation of nano-structured oxides for supporting catalysts or for performing catalysis. Theory was used to analyze many of the observations or to propose new catalytic systems. |
|
| Magnetic Clutter Reduction Efficiency in Humanitarian Demining |
FEB 2008 |
|
| Authors:
E. M. Ubink; W. A. LOTENS; R. F. Aldershoff; TNO DEFENCE SECURITY AND SAFETY SOESTERBERG (NETHERLANDS)
|
| The aim of the project was to quantify the efficiency increase obtained by using hand-held permanent magnets(- tools) to remove metallic clutter from the top layer of the ground in the `close-in' detection phase of humanitarian demining operations. Therefore, three successive trials were executed in live demining operations in Cambodia and Angola. Four magnet(-tools) were chosen for the trials: a ring magnets and a block magnet and two rakes with ... |
|
| Design of a Tunable, Room Temperature, Continuous-Wave Terahertz Source and Detector using Silicon Waveguides |
30-Jan-2008 |
9 pages |
| Authors:
A Scherer; T Baehr-Jones; M Hochberg; Richard Soref; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
|
| We describe the design of a silicon-based source for radiation in the 0.5-14 THz regime. This new class of devices will permit continuously tunable, milliwatt scale, cw, room temperature operation, a substantial advance over currently available technologies. Our silicon terahertz generator consists of a silicon waveguide for near-infrared radiation, contained within a metal waveguide for terahertz radiation. A nonlinear polymer cladding permits two near-infrared lasers to mix, and through difference-frequency ... |
|
| Sonic Fatigue Testing of a Functionally Graded Ti/TiB Material |
JAN 2008 |
147 pages |
| Authors:
Larry Byrd; Eric J. Tuegel; Jeffrey Quast; Carl Boehlert; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| The objective of this program was to determine how a functionally graded metal-ceramic material responds to high-frequency loading that is characteristic of sonic fatigue. This material has potential use as skins of aerodynamically heated structure and will experience fluctuating pressure that may result in sonic fatigue. Fatigue cracking starts in the brittle ceramic-rich layer. It was thought that the ductile metal-rich layers would increase the life of the specimen over ... |
|
| Magnesium Rich Primer for Chrome Free Protection of Aluminum Alloys (Preprint) |
DEC 2007 |
19 pages |
| Authors:
Joel A. Johnson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH NONSTRUCTURAL MATERIALS BRANCH
|
| Hexavalent chromium compounds used for corrosion protection are one of the top hazardous waste materials generated by the U.S. Air Force and legislation is in effect to further restrict their use. Magnesium rich primers that utilize sacrificial magnesium metal pigment to cathodically protect aerospace aluminum alloy substrates are a potential alternative to chromated primers. This material has proven to be particularly effective as part of a completely chromate-free coating system ... |
|
| An Analysis of Magnesium Alloy AZ31B-H24 for Ballistic Applications |
DEC 2007 |
20 pages |
| Authors:
Tyrone L. Jones; Matthew S. Burkins; William A. Gooch; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The U.S. Army Research Laboratory is developing a ballistic specification for the use of magnesium alloy AZ31B-H24 as armor on Army platforms. Data were generated for a range of thicknesses of this magnesium alloy, 0.25 to 4 inches, with the use of five different projectiles. The magnesium performance is parametrically quantified on an equivalent areal density to meet the aluminum alloy 5083-H131, which means a mature, well defined, low-density metal. ... |
|
| Surface Plasmon Polariton Dependence on Metal Surface Morphology |
13 NOV 2007 |
39 pages |
| Authors:
Robert E. Peale; UNIVERSITY OF CENTRAL FLORIDA ORLANDO
|
| Generation and propagation of surface plasmons on nano-structured gold films was studied using optical and electron-beam techniques. Optical excitation of surface plasmons in Au-black films prepared by evaporation in moderate vacuum was observed. Initial indication of propagation of surface plasmons at visible-light frequencies over ~10 nm length scales was observed. A tunable terahertz detector based on two-dimensional plasmons in a semiconductor heterostructure was designed. These results have application to the ... |
|
| Development of Health Monitoring Techniques for Composite Structures |
07 NOV 2007 |
153 pages |
| Authors:
Hisao Fukunaga; Ning Hu; TOHOKU UNIV SENDAI (JAPAN)
|
| The purpose of this project is to develop two kinds of composite structural health monitoring approaches. One is a passive element based on the impact force identification combined with a database. This database can quickly evaluate the impact-induced damages in composites by employing the identified impact force. It can be built up by using a powerful numerical model for impact damage evaluation with the help of experimental data. Another is ... |
|
| Plantenna or a Plant made to Function as an Antenna |
30-Oct-2007 |
12 pages |
| Authors:
V Chandraselar; COLORADO STATE UNIV FORT COLLINS
|
| The Plantenna project has the overlying goal to simply use a plant as an antenna. To do this, special plants called metal hyper accumulators are being tested to observe any antenna like properties. The testing so far has been focused at finding an appropriate testing procedure while analyzing the basic impedance properties of plants concerning the relationships between impedance and test frequency and impedance and plant length. This report will ... |
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| Silica-Immobilized Enzymes for Multi-Step Synthesis in Microfluidic Devices (Postprint) |
OCT 2007 |
7 pages |
| Authors:
Heather R. Luckarift; Bosung S. Ku; Jonathan S. Dordick; Jim C. Spain; AIR FORCE RESEARCH LAB TYNDALL AFB FL MATERIALS AND MANUFACTURING DIRECTORATE
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| The microfluidic combinatorial synthesis of 2-aminophenoxazin-3-one (APO) is reported. Individual microfluidic chips containing metallic zinc, silica-immobilized hydroxylaminobenzene mutase and silica-immobilized soybean peroxidase are connected in series to create a chem-enzymatic system for synthesis. Zinc catalyzes the initial reduction of nitrobenzene to hydroxylaminobenzene which undergoes a biocatalytic conversion to 2-aminophenol, followed by enzymatic polymerization to 2-aminophenoxazin-3-one. Silica-immobilization of enzymes allows the rapid stabilization and integration of a biocatalyst within a microfluidic ... |
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| Design and Processing of Structural Composite Batteries |
SEP 2007 |
20 pages |
| Authors:
E. L. Wong; D. M. Baechle; K. Xu; R. H. Carter; J. F. Snyder; E. D. Wetzel; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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| This report is a reprint from the Proceedings of Society for the Advancement of Materiel and Process Engineering (SAMPE) 2007 Symposium and Exhibition held in Baltimore, MD, on 3-7 June 2007. Multifunctional structural composites are being developed to simultaneously bear mechanical loads and store electrochemical energy. These composite batteries can replace inert structural components and concurrently provide supplementary power for light load applications. Significant weight savings can be achieved by ... |
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| Evaluation of Airborne Remote Sensing Techniques for Predicting the Distribution of Energetic Compounds on Impact Areas |
AUG 2007 |
202 pages |
| Authors:
Mark R. Graves; Linda P. Dove; Thomas F. Jenkins; Susan Bigl; Marianne E. Walsh; Alan D. Hewitt; Dennis Lambert; Nancy Perron; Charles Ramsey; Jeff Gamey; Les Beard; William E. Doll; Dale Magoun; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| The characterization of impact area munitions constituents has typically employed traditional soil sampling approaches. These sampling approaches do not accurately account for the distribution of such contaminants over the landscape due to the distributed nature of explosive compound sources throughout impact areas, the highly localized distribution of contaminants surrounding these sources, and inaccurate records of historical target locations. Remote sensing and geographic information system (GIS) technologies were utilized to assist ... |
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| Biological-Warfare Agent Decontamination Efficacy Testing: Large-Scale Chamber mVHP (Trademark) Decontamination System Evaluation for Biological Contamination |
AUG 2007 |
62 pages |
| Authors:
Teri A. Lalain; Mark D. Brickhouse; Jerry W. Pfarr; Stanley C. Gater; James P. Hendershot; Brent A. Mantooth; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
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| The STERIS Vaporous Hydrogen Peroxide (VHP (Trademark)) technology has been used for more than a decade to sterilize pharmaceutical processing equipment and clean rooms. Through a joint partnership, the U.S. Army Edgewood Chemical Biological Center (ECBC) and STERIS Corporation Inc., a subsidiary of Strategic Technology Enterprises (STE), began the process to co-develop a modified VHP (mVHP) capable of biological and chemical decontamination. Significant improvements have been made through a series ... |
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