| Ion Channel Conductance Measurements on a Silicon-Based Platform |
2006 |
5 pages |
| Authors:
S. J. Wilk; S. Aboud; L. Petrossian; M. Goyll; J. M. Tang; R. S. Eisenberg; M. Saraniti; S. M. Goodnick; T. J. Thornton; ARIZONA STATE UNIV TEMPE CENTER FOR SOLID STATE ELECTRONICS RESEARCH
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 | Conductance measurements of the transmembrane porin protein OmpF as a function of pH and bath concentration have been made with both a microfabricated silicon substrate device and a commercially available polystyrene aperture. Ion transport through the channel was simulated in atomic detail: the measured current was compared with theoretically calculated current, using a Brownian Dynamics kernel coupled to the Poisson equation by a P3M force field. The explicit protein structure ... |
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| Voltage-Induced Insulator-Metal Transition at Room Temperature in an Anodic Porous Alumina Thin Film |
2006 |
5 pages |
| Authors:
S. Kato; S. Nigo; Y. Uno; T. Onisi; G. Kido; NATIONAL INST FOR MATERIALS SCIENCE TSUKUBA IBARAKI (JAPAN) NANO-MATERIALS LAB
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| Bistable switching effect, induced by an electric field, in an anodic porous alumina thin film is reported. An electrode was bonded on the surface of a thin film with Ag paste, and I-V characteristic between the electrode and the aluminium substrate was measured The I-V characteristic reveals a reversible resistance change, initiating at +4 V and terminating at 1.5 V at room temperature. Huge electrical resistance change ratio (RR), defined ... |
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| Z-Scan and Four-Wave Mixing Characterization of Semiconductor Cadmium Chalcogenide Nanomaterials |
2006 |
5 pages |
| Authors:
Qiguang Yang; Jae Tae Seo; Santiel Creekmore; Guolong Tan; Herbert Brown; Seong Min Ma; Linwood Creekmore; Huitian Wang; SungSoo Jung; Min Namkung; HAMPTON UNIV VA DEPT OF PHYSICS
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| The possible physical origin of third-order nonlinearity of cadmium chalcogenide (Te, Se, and S) semiconductor nanocrystals were discussed based on the results of both Z-scan and degenerate four-wave mixing spectroscopies of 532, 775, 800, and 1064 nm in nanosecond, picosecond, and femtosecond time scale for nonlinear photonic applications. |
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| Spectrophotometric Analysis of the Cyanide Metabolite 1-Aminothiazoline-6-Carboxylic Acid |
2006 |
8 pages |
| Authors:
Steven I. Baskin; Ilona Petrikovics; Gennady E. Platoff; Gary A. Rockwood; Brian A. Logue; ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD
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| Methods of directly evaluating cyanide levels are limited by the volatility of cyanide and by the difficulty of establishing steady- state cyanide levels with time. We investigated the measurement of a stable, toxic metabolite, 2-aminothiazoline-4- carboxylic acid (ATCA), in an attempt to circumvent the challenge of directly determining cyanide concentrations in aqueous media. This study was focused on the spectrophotometric ATCA determination in the presence of cyanide, thiocyanate (SCN-), cysteine, ... |
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| Sulfur Mustard-induced Neutropenia: Treatment with Granulocyte Colony-stimulating Factor |
2006 |
7 pages |
| Authors:
Dana R. Anderson; Wesley W. Holmes; Robyn B. Lee; Stephen J. Dalal; Charles G. Hurst; Beverly I. Maliner; Jonathan Newmark; William J. Smith; ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD
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| Although best known as a blistering agent, sulfur mustard (HD) can also induce neutropenia in exposed individuals, increasing their susceptibility to infection. Granulocyte colony- stimulating factor (G-CSF) and pegylated G-CSF (peg-G-CSF) have been approved by the U.S. Food and Drug Administration as hematopoietic growth factors to treat chemotherapy-induced neutropenia. The goal of this study was to determine the effectiveness of G-CSF and peg-G-CSF in ameliorating HD-induced neutropenia. African green monkeys ... |
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| Preliminary Studies Examining Near Ultraviolet Fluorescence and Raman Spectroscopy for Tissue Interrogation of Shock |
31 DEC 2005 |
5 pages |
| Authors:
James Terner; VIRGINIA COMMONWEALTH UNIV RICHMOND
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| Non-invasive methods for the measurement of tissue oxygen saturation have long been sought for the detection of impending shock and the adequacy of resuscitation. Current methods such as those that require insertion of a catheter into the pulmonary artery or superior vena cava have attendant risks to the patient. Gastric tonometry, though considered to be minimally invasive, still requires insertion of a nasogastric tube into the stomach. We have found ... |
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| Studies of Biosilicification; The Role of Proteins, Carbohydrates and Model Compounds in Structure Control |
31 DEC 2005 |
141 pages |
| Authors:
Carole C. Perry; NOTTINGHAM TRENT UNIV (UNITED KINGDOM)
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| `Si' (in some form) has been shown to be associated with post-translationally modified protein and carbohydrate biopolymer components of the plant cell wall from Equisetum arvense. Bioextracts from the plant cell wall and bioinspired additives from amino acids, peptides, proteins and molecules containing reactive groups such as amines and hydroxyl groups have been found to modify the properties of silicas generated in their presence. The observed patterns of behaviour are ... |
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| Research and Development of Silicon Carbide (SiC) Avalanche Sharpeners for Picosecond Range, High Power Switches |
20 DEC 2005 |
19 pages |
| Authors:
Igor V. Grekhov; RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
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| This report results from a contract tasking loffe Institute as follows: The Grantee will develop, fabricate, test, and characterize 4H-SiC power semiconductor switches operating in picosecond range of switch time. Special 4H-SiC multi-layered junction structures, such as diode structures (p+nn+-type) and triode structures (p+np+- and n+pn+-type) will be fabricated and tested as avalanche sharpeners. |
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| Drawing Nylon 6,6 Fibers in High Pressure CO2 |
07 DEC 2005 |
27 pages |
| Authors:
Alan J. Lesser; MASSACHUSETTS UNIV AMHERST
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| Research studies have been performed on various fibers using supercritical carbon dioxide treatments. In these studies, Nylon6,6, PBO (Zylon) and other polyester fibers are treated under various conditions and post -treated fiber properties are measured and reported. In this research, supercritical CO2 is used as a plasticizing medium, a transport medium, and as a pressurizing medium to enhance the mechanical performance of selected high performance fibers. In a variety of ... |
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| First-Principles Study of the Stability and Electronic Properties of Sheets and Nanotubes of Elemental Boron |
01 DEC 2005 |
7 pages |
| Authors:
Kah C. Lau; Ranjit Pati; Ravindra Pandey; Andrew C. Pineda; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
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| The structural and electronic properties or sheets and nanotubes or boron are investigated using density functional theory. The calculations predict the stability or a novel reconstructed {1 2 2 1} sheet over the idealized triangular {1 2 1 2} sheet. Nanotubes formed by wrapping the half-metallic {1 2 2 1} sheet show a curvature-induced transition in their electronic properties. Analysis of the charge density reveals a mixed metallic- and covalent-type ... |
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| Development of Synthesis and Large Scale Production Technology for Ultrahigh Energy and Density Fluoro-Organic Compounds |
DEC 2005 |
47 pages |
| Authors:
Jing Yang; Travis W. Knight; Jr. Dolfier William R.; Corin Segal; NEW ERA TECHNOLOGIES INC GAINESVILLE FL
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| This Phase II STTR project addressed the laboratory production and testing and commercialization aspects of producing high-density fluorine-rich compounds that are significantly more reactive and energetic than conventional explosives to neutralize and destroy chemical and biological agents. The project combined the scientific research base of the University of Florida Department of Chemistry and Department of Mechanical and Aerospace Engineering with the analytical skills and technology marketing expertise of New Era ... |
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| Thermal Modeling of GaN HEMTs on Sapphire and Diamond |
DEC 2005 |
71 pages |
| Authors:
III Salm Roman P.; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Wide bandgap semiconductors have entered into Naval radar use and will eventually replace vacuum tube and conventional solid-state amplifiers for all modern military radar and communications applications. Gallium Nitride (GaN) High Electron Mobility Transistors (HEMTs) are on the leading edge of wide bandgap technology and have the performance characteristics to dominate in high power - high bandwidth applications. The Defense Advanced Research Projects Agency (DARPA), Office of Naval Research (ONR) ... |
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| Secondary Mineral Formation Associated With Respiration of Nontronite, NAu-1 by Iron Reducing Bacteria |
DEC 2005 |
11 pages |
| Authors:
S. E. O'Reilly; Janet Watkins; Yoko Furukawa; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS SEAFLOOR SCIENCES DIRECTORATE
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| Experimental batch and miscible-flow cultures were studied in order to determine the mechanistic pathways of microbial Fe(III) respiration in ferruginous smectite clay, NAu-1. The primary purpose was to resolve if alteration of smectite and release of Fe precedes microbial respiration. Alteration of NAu-1, represented by the morphological and mineralogical changes, occurred regardless of the extent of microbial Fe(III) reduction in all of our experimental systems, including those that contained heat-killed ... |
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| Measurements of T2 of Electron Spins at Bound Donor Sites in Si:P |
17 NOV 2005 |
6 pages |
| Authors:
W. G. Clark; Karoly Holczer; Stuart Brown; Eli Yablonovitch; CALIFORNIA UNIV LOS ANGELES
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| The goal of the project was to establish the limitations on the transverse spin relaxation of bound donors in dilute semiconductors, in particular in Si:P. The experiments were undertaken in two steps, first using the existing pulsed EPR spectrometer in Prof. Holczer's laboratory, and then extending to longer times after obtaining an upgrade in hardware from Bruker Biospin Corporation. |
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| Amphiphiles for DNA Supramolecular Assemblies |
15 NOV 2005 |
12 pages |
| Authors:
Philippe Barthelemy; UNIVERSITE D'AVIGNON ET DES PAYS DE VAUCLUSE (FRANCE)
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| This final progress report presents the research work achieved under this contract on the nucleoside based lipids. Most of the molecules synthesized have shown remarkable physico-chemical properties. The supramolecular systems obtained are promising in many aspects and could lead to material suitable for biomacromolecules transport (DNA, RNA, siRNA..) and/or preparation of Hybrid Lanthanides and actinides microspheres. A summary of the most important results is presented. |
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| Fabrications and Characterizations of ZnO/Zn(1-x)Mg(x)O Nanorod Quantum Structures |
08 NOV 2005 |
12 pages |
| Authors:
Gyu-Chul Yi; POHANG UNIV OF SCIENCE AND TECHNOLOGY (SOUTH KOREA)
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| This project investigated photoluminescent properties of ZnO/ZnMgO coaxial nanorod heterostructures and ZnO/ZnMgO nanorod single-quantum-well structures (SQWs). Individual nanorod SQWs were characterized by scanning near-field optical microscopy. |
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| Silicon Quantum Information Processing |
07 NOV 2005 |
11 pages |
| Authors:
D. J. Paul; CAMBRIDGE UNIV (UNITED KINGDOM) CAVENDISH LAB
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| The initial aim of the programme was to demonstrate three qubits using Na donors in Si MOSFETs by the end of the programme. The initial objectives can be summarised as follows:- 2.1 Fabricate a single electron transistor using AFM lithography on the gate of a MOSFET. This is the 2.2 Fabricate a MOSFET with a determined number 2.3 Fabricate and detect the positioning of a single Na+ ion in a ... |
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| Summary of Inductive SiC BJT Switching |
NOV 2005 |
18 pages |
| Authors:
Steven L. Kaplan; ARMY RESEARCH LAB ADELPHI MD
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| Significant development of silicon carbide (SiC) for device applications allows its uniquely favorable properties to be exploited in circuit designs. The 4H-SiC structure has several characteristics that provide optimal speed and power handling. These include wide bandgap (3 cV), high dielectric breakdown (3.5 MV/cm), and high thermal conductivity (5 W/cm-K) [1]. By combining these properties, SiC bipolar junction transistors can achieve fast switching at high voltages (1.2 kV). New generation ... |
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| Microwave Photonics |
NOV 2005 |
75 pages |
| Authors:
R. M. Boysel; N. Stoffel; P. Lin; P. Sims; INFOTONICS TECHNOLOGY CENTER INC CANANDAIGUA NY
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| During this program critical infrastructure, technical expertise, and enabling processes necessary to accelerate the development of sensors, alternative power sources and other specific subtopics as well as initiated device development projects of specific interest to DoD were developed. A state-of-the-art microsystems prototype and pilot fabrication facility was established to enable rapid commercialization of new products. With targeted research programs guided by the wealth of expertise of Infotonics' business and scientific ... |
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| Simulation of Heating of Oil-Cooled Switch Modules |
NOV 2005 |
20 pages |
| Authors:
Gregory K. Ovrebo; ARMY RESEARCH LAB ADELPHI MD
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| I used solid modeling and finite element fluid dynamics codes to simulate the thermal characteristics of switch modules built from silicon carbide bipolar junction transistors (BJTs) and Schottky diodes. The results of the simulation can be used in conjunction with thermal management techniques to mitigate heating of high power, high temperature electronics and minimize the risk of damage during operation. |
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| Standardized UXO Technology Demonstration Site Moguls Scoring Record Number 665 |
NOV 2005 |
49 pages |
| Authors:
Larry Overbay; Rick Fling; Christina McClung; George Robitaille; Matthew Banta; ABERDEEN TEST CENTER MD
|
| This scoring record documents the efforts of Geophex, Ltd. to detect and discriminate inert unexploded ordnance (UXO) utilizing the APG Standardized UXO Technology Demonstration Site Moguls. Scoring Records have been coordinated by Larry Overbay and the Standardized UXO Technology Demonstration Site Scoring Committee. Organizations on the committee include, the U.S. Army Corps of Engineers, the Environmental Security Technology Certification Program, the strategic Environmental Research and Development Program, the Institute for ... |
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| Identification and Validation of PTEN Complex, Associated Proteins |
NOV 2005 |
18 pages |
| Authors:
Rosalia Rabinovsky; DANA-FARBER CANCER INST BOSTON MA
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| The PTEN/MMAC1/TEP1 is a tumor suppressor gene, targeted for biallelic somatic inactivation in a variety of cancers including advanced prostate adenocarcinomas among many others malignancies. PTEN is a phosphatase and has an important role in regulation of the PI3K/AKT signaling pathway, which plays a key role in regulating cellular functions including proliferation, apoptosis, glucose homeostasis, cell size, nutrient response and DNA damage. Furthermore, PTEN functions in the cell to restrict ... |
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| Carbon Steel Corrosion in Key West and Persian Gulf Seawaters at Varying Oxygen Concentrations |
NOV 2005 |
17 pages |
| Authors:
Richard I. Ray; Jason S. Lee; Brenda J. Little; Edward J. Lemieux; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Corrosion of 1020 carbon steel coupons in natural Key West and Persian Gulf seawaters was directly related to exposure conditions. Exposure conditions included the following: stagnant and sloshing, oxygenated and deoxygenated seawater, in addition to, alternating immersion and drying with oxygenated and deoxygenated sea waters. Microbial populations in the two waters fluctuated with exposure conditions. Of all of the exposure conditions, the anaerobic stagnant Key West sea water exposure produced ... |
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| Moisture Effects on Copper Thin Film Adhesion |
NOV 2005 |
5 pages |
| Authors:
Patrick J. Waters; Alex A. Volinsky; UNIVERSITY OF SOUTH FLORIDA TAMPA DEPT OF MECHANICAL ENGINEERING
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| The effects of moisture on copper thin film adhesion have been investigated using a modified version of the superlayer indentation test. Copper films up to 100 nm thick were sputter deposited on thermally oxidized silicon wafers. A 1 um tungsten superlayer with I GPa compressive residual stress was sputter deposited on top of Cu films, providing extra energy for interfacial debonding upon indentation. The samples were first indented to a ... |
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| Catalytic Degradation of Methylphosphonic Acid Using Iron Powder/Iron Oxides |
NOV 2005 |
|
| Authors:
Joseph J. Moniodis; John Webb; Gary Mathys; Harry Rose; Robert Mathews; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) HUMAN PROTECTION AND PERFORMANCE DIV
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 | The catalytic degradation of methylphosphonic acid, the final hydrolysis product of some nerve agents, using Fe, Fe2O3, FePO4 and Al/Al2O3 was studied by evolved gas analysis - Fourier transform infrared spectroscopy (EGA-FTIR) under nitrogen, air and oxygen atmospheres. All of the compounds catalysed the reaction to some extent (in comparison to heating MPA alone) with Fe2O3 being the best catalyst with carbon-containing gases evolving at 375 C under all atmospheres. ... |
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| Thermochemistry and Dynamics of Reactive Species: Nitrogen-rich Compounds, Metals and SiC Clusters in Free and Solvated Environment |
31 OCT 2005 |
17 pages |
| Authors:
William C. Lineberger; Veronica M. Bierbaum; JOINT INST FOR LAB ASTROPHYSICS BOULDERCO
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| We have completed a three-year program of research into the properties of nitrogen-rich heterocyclic compounds, all nitrogen compounds and silicon carbide clusters with adatoms. The research projects all include a very strong blend of experiment and state-of-the-art theory, obtaining structural and thermochemical properties of unusual and unstable species. The experimental approaches include anion photoelectron spectroscopy and detailed investigations of ion-molecule reactions using flowing afterglow and drift tube reactors. These techniques ... |
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| Low Defect Density Substrates and High-Quality Epi-Substrate Interfaces for ABCS Devices and Progress Toward Phonon-Mediated THz Lasers |
31 OCT 2005 |
140 pages |
| Authors:
William Goodhue; David Bliss; Kannan Krishnaswami; Shivashankar Vangala; Jin Li; Beihong Zhu; MASSACHUSETTS UNIV LOWELL
|
| Over the past four years the University of Massachusetts Photonics Center, the Center for Advanced Materials and the Submillimeterwave Technology Laboratory in partnership with AFRL/SNHC has been developing technology for producing low defect density substrates and high-quality epi-substrate interfaces for ABCS device applications as well as developing fabrication and device concepts for incorporation into quantum-cascade THz lasers. During the course of the project a number of new technologies were developed ... |
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| Theory of Monte-Carlo Simulations of the Magnetic Circular Dichroism (MCD) Spectra of Alkali Metal/Rare Gas Systems (PREPRINT) |
31 OCT 2005 |
24 pages |
| Authors:
AIR FORCE RESEARCH LAB EDWARDS AFB CA
|
| The history of magnetic circular dichroism (MCD) spectroscopy in the study of alkali metal/rare gas (M/Rg) cryogenic systems is reviewed in the context of developing a better understanding of alkali metal/hydrogen systems of current interest to the U.S. Air Force as enhanced-performance cryogenic rocket propellants. A new theory for simulating the MCD spectra of M/Rg systems is presented together with a careful discussion of the theory's implicit and explicit approximations ... |
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| Ionic Liquids R&D at US Air Force Research Laboratory (Preprint) |
24 OCT 2005 |
9 pages |
| Authors:
T. W. Hawkins; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| Briefing charts only on Ionic Liquids Research and Development at the Air Force Resarch Lab. |
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| Development of Textured Buffer Layer on Metal Tapes for Oxide Superconductors |
14 OCT 2005 |
22 pages |
| Authors:
R. S. Bhattacharya; Y. Xu; UES INC DAYTON OH
|
| Report documents the development effort dedicated to the scale up of inclined substrate deposition (ISD) of textured magnesium oxide (MgO) on continuous tapes of nickel based alloys under an AFOSR Phase II STTR program, in partnership with Argonne National Laboratory (ANL). Long length highly textured MgO template has been successfully deposited on HC substrate in the reel-to-reel system. High deposition rate up to 10 nm/sec of the ISD MgO ebeam ... |
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| New Graduate Student for Silicon QC Project |
08 OCT 2005 |
6 pages |
| Authors:
John R. Tucker; JIAOTONG UNIV SHANGHAI (CHINA)
|
| This grant has provided funding for an additional graduate student, Stephen J. Robinson, to work on ARO/ARDA project DAAD-19-00-1-0407, "Controlled Coupling of Donor Atom Wavefunctions in Silicon", at the University of Illinois under the supervision of Co-PI John Tucker. Stephen's research involves fabrication of the ion-implanted contact arrays used for atom-scale STM P donor device fabrication, and low temperature measurements to characterize their properties. His efforts have been closely coordinated ... |
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| Ultra-High-Q Microcavity Operation in H2O and D2O |
07 OCT 2005 |
4 pages |
| Authors:
A. M. Armani; D. K. Armani; B. Min; K. J. Vahala; S. M. Spillane; CALIFORNIA INST OF TECH PASADENA DEPT OF APPLIED PHYSICS
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| Optical microcavities provide a possible method for boosting the detection sensitivity of biomolecules. Silica-based microcavities are important because they are readily functionalized, which enables unlabeled detection. While silica resonators have been characterized in air, nearly all molecular detections are performed in solution. Therefore, it is important to determine their performance limits in an aqueous environment. In this letter, planar microtoroid resonators are used to measure the relationship between quality factor ... |
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| GaN/AlGaN Terahertz Quantum Cascade Laser |
07 OCT 2005 |
12 pages |
| Authors:
S. C. Wang; NATIONAL CHIAO TUNG UNIV HSINCHU (TAIWAN)
|
| The quantum-cascade laser (QCL) has, since its first realization, demonstrated an impressive and rapid development, extending the emission wavelengths from midinfrared to terahertz spectral range. However, QCLs based on GaAs/AlGaAs and AlInAs/GaInAs are not capable of emitting in the energy range around the LO-phonon energies (ELO~36 meV in GaAs and ELO~34 meV in InGaAs), leaving a gap in the spectral scale between 30 and 40 μm. This can be overcome ... |
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| Advanced Lithium Anodes for Li/Air and Li/Water Batteries |
05 OCT 2005 |
46 pages |
| Authors:
Steven J. Visco; POLYPLUS BATTERY COMPANY INC BERKELEY CA
|
| PolyPlus Battery Company has developed glass protected lithium anodes that are chemically stable and electrochemically active in both aqueous and non-aqueous electrolyte. This innovation enables the development of both primary and secondary lithium batteries having exceptionally high gravimetric and volumetric energy densities. The gravimetric capacity of lithium is 3800 mAh/g and the open circuit potential for lithium/water and lithium/air couples is more than 3 volts resulting in theoretical energy densities ... |
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| Catalytic Buffering: Development of the Fluoride-Resistant Ureases of Klebsiella pneumoniae |
01 OCT 2005 |
13 pages |
| Authors:
Ilona J. Fry; Joseph J. Defrank; GEO-CENTERS INC ABERDEEN PROVING GROUND MD
|
| Catalytic buffering is an advanced method of pH control for the enzyme-based chemical agent decontamination technology Advanced Catalytic Enzyme System (ACES). Ammonia production from urea by urease neutralizes the production of O- alkylphosphonic acids resulting from OPAA and OPH catalytic hydrolysis of G-agents and VX. Unfortunately, ureases are inhibited by low levels of fluoride, another product of GB, GD and GF hydrolysis. To overcome this problem, the urease structural genes ... |
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| Application of Adenovirus Expression System for the Production of Recombinant Cholinesterases |
01 OCT 2005 |
8 pages |
| Authors:
N. Chilukuri; K. Parikh; R. Naik; C. Chambers; J. M. Watt; P. Tipparaju; B. P. Doctor; A. Saxena; WALTER REED ARMY INST OF RESEARCH SILVER SPRING MD
|
| Previous studies in rodents and nonhuman primates demonstrated that pretreatment of animals with cholinesterases (ChEs) could provide significant protection against behavioral and lethal effects of nerve agent intoxication. Currently, human serum butyrylcholinesterase (BChE) is under development as medical countermeasure against organophosphate chemical warfare agent toxicity. In this study, we report the expression of human BChE and bovine acetylcholinesterase (AChE) using the newly designed adenovirus expression system. The shuttle vector employed ... |
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| DNAPL Source Zone Depletion During In Situ Chemical Oxidation (ISCO): Experimental and Modeling Studies |
Oct-2005 |
356 pages |
| Authors:
Jeffrey L Heiderscheidt; COLORADO SCHOOL OF MINES GOLDEN
|
| In situ chemical oxidation (ISCO) using permanganate is a promising technology for remediating groundwater and soil contaminated by chlorinated solvents present as dense non-aqueous phase liquids (DNAPLs). However, there remain gaps in knowledge about ISCO effects on mass depletion from complex DNAPL source zones and effects of MnO2(s) formation, impacting field application of the technology. Further, a simulation tool is needed for studying ISCO under typical complex field conditions. A ... |
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| Development of Advanced Oxide Dispersion Strengthened Tungsten Heavy Alloy for Penetrator Application |
30 SEP 2005 |
47 pages |
| Authors:
Soon H. Hong; Ho J. Ryu; Seung I. Cha; Hee Y. Kim; Kyung T. Kim; Kyong H. Lee; Chan B. Mo; KOREA ADVANCED INST OF SCIENCE AND TECHNOLOGY DAEJEON (KOREA)
|
| The effects of fabrication process parameters, including conditions for powder preparation, sintering, cyclic heat-treatment, swaging, and annealing processes, on microstructures and static/dynamic mechanical properties of ODS tungsten heavy alloys were investigated. The composition of ODS tungsten heavy alloys was designed as 94W-4.56Ni-1.14Co-0.3Y2O3 which show the highest strength at similar microstructural parameters based on the analysis of microstructures and mechanical properties. The two-stage sintered ODS tungsten heavy alloy showed finer tungsten ... |
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| Studies of Heavily Strained and Strain-Compensated Type-I GaSb Based Heterostructures for Development of High Efficiency Coherent Sources Operating in the Range of 2.3 - 3.5 microns |
28 SEP 2005 |
11 pages |
| Authors:
Gregory Belenky; L. E. Vorobiev; STATE UNIV OF NEW YORK AT STONY BROOK
|
| A new class of high power continuous wave room-temperature operated GaSb-based mid-infrared lasers and laser arrays was developed. World record devices were designed and fabricated. (1) 1W CW and 5W pulsed single laser operation was achieved in 2.3-2.5 micron range. (2) 500mW continuous wave (2.5W in pulse) and 160mW continuous wave (2W in pulse) was reported for 2.7 and 2.8 micron devices, respectively. (3) Linear laser arrays operating at 2.35 ... |
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| Designed Ceramics for Aerospace Applications |
28 SEP 2005 |
7 pages |
| Authors:
I-Wei Chen; PENNSYLVANIA UNIV PHILADELPHIA DEPT OFMATERIALS SCIENCE AND ENGINEERING
|
| During this project we have optimized the performance of alpha-SiAlON with respect to the following properties: hardness, fracture toughness, room temperature strength, high temperature strength, oxidation resistance, and machinability. Strong correlations between some of these properties have been found. For example, a positive correlation between fracture toughness and room temperature strength, a positive correlation between high temperature strength and oxidation resistance, a negative correlation between hardness and machinability, and a ... |
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| Overview of Major U.S. Industrial Electric Propulsion Programs: Moog Contribution |
28 SEP 2005 |
3 pages |
| Authors:
Paul T. King; MOOG INC EAST AURORA NY
|
| Moog successfully integrated, tested and delivered the Xenon Control Assembly (XCA) for the JPL DAWN program in September 2004. The DAWN XCA relies, in part, on the Moog bang-bang regulators and latch valves for flow control and isolation. |
|
| Phosphorous Saturation Characteristics in Relation to Land-Use Practice for Soils in the Upper Eau Galle River Watershed, Wisconsin |
21 SEP 2005 |
7 pages |
| Authors:
William F. James; John W. Barko; David M. Soballe; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The purpose of this demonstration was to determine relationships between phosphorus saturation characteristics and extractable phosphorus forms in soils from differing land-use practices in an agriculturally dominated watershed that drains into a U.S. Army Corps of Engineers impoundment. This information will be important for watershed modeling applications that use an index of soils to predict phosphorus loss during runoff. Table 1 Category Program. |
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| Local Strain Development and Property Variability in B2 Intermetallics |
19 SEP 2005 |
25 pages |
| Authors:
Tresa M. Pollock; Marc de Graef; MICHIGAN UNIV ANN ARBOR DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| The overall objective of this research program was to develop a quantitative understanding of the relationship of straining processes at the scale of microstructure to macroscopic mechanical properties of structural materials. To accomplish this, experimental high-resolution displacement mapping techniques for analysis of strains at the micron scale were developed and validated. Strain accumulation and its relationship to microstructural features in several variants of the B2 intermetallic RuAl were investigated. Significant ... |
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| Inhibition of Nitric Oxide Synthase Through Depletion of Its Cofactor Tetrahydrobiopterin as a Novel Strategy for Breast Cancer Anti-Angiogenic Therapy |
14 SEP 2005 |
53 pages |
| Authors:
Ines Batinic-Haberle; DUKE UNIV MEDICAL CENTER DURHAM NC
|
| We showed previously that low molecular weight water-soluble antioxidant, manganese (III) tetrakis (N- ethylpyridinium-2-yl) porphyrin (Mn(exp III)TE-2-PyP(exp 5+) is effective catalyst for the elimination of reactive oxygen and nitrogen species in different rodent models of oxidative stress injuries. We further showed that this porphyrin can oxidize cellular reductants, among them redox cofactor of nitric oxide synthase (NOS), tetrahydrobiopterin, BR(sub 4). It has been well- established that nitric oxide is essential ... |
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| A Model for Ammonia Solar Thermal Thruster (PREPRINT) |
14 SEP 2005 |
34 pages |
| Authors:
Gianpiero Colonna; Giulia Capitta; Mario Capitelli; Ingrid J. Wysong; AIR FORCE RESEARCH LAB EDWARDS AFB CA
|
| This work is an attempt to investigate the nozzle expansion characteristics of a solar thruster that uses ammonia as propellant. For this purpose we have developed a state to state kinetic model to study the dissociation of ammonia in a supersonic nozzle expansion. The properties of the thruster depend on the ammonia dissociation degree in the reservoir, which can be very far from equilibrium due to the very slow dissociation ... |
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| Optical and Magnetic Resonance Characterization of Donors and Acceptors in Zinc Oxide (DEPSCoR) |
08 SEP 2005 |
11 pages |
| Authors:
Larry E. Halliburton; Nancy C. Giles; WEST VIRGINIA UNIV MORGANTOWN DEPT OF PHYSICS
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| This is the final report for a three-year project to identify and characterize donors and acceptors in single crystals of ZnO. Samples were obtained from our industrial partner (Eagle-Picher) and from the Air Force Research Laboratory (Hanscom AFB). The experimental techniques used to characterize the crystals were Hall effect, infrared and visible absorption, photoluminescence, thermoluminescence, electron paramagnetic resonance (EPR), and electron-nuclear double resonance (ENDOR). Studies completed during this project include: ... |
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| Nanoparticles Doped, Photorefractive Liquid Crystals |
03 SEP 2005 |
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| Authors:
Malgosia Kaczmarek; SOUTHAMPTON UNIV (UNITED KINGDOM)
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| This report results from a contract tasking University of Southampton as follows: The main objectives of this exploratory, short project will concern the study of the quality of liquid crystal cells with diluted suspensions of ferroelectric nanoparticles and their photorefractive properties. We will use ferroelectric nanoparticles of photorefractive material: thiohypodiphosphate (Sn2P2S6). The actual nano-particles have been produced by a method (fine mechanical grinding), tested earlier. Sn2P2S6 nanoparticles proved, so far, ... |
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| The Relationship Between Copper Speciation and Toxicity for Larvae of the Blue Mussel Mytilus edulis: Regulatory Implications and Determination of Water Effect Ratios |
07 SEP 2005 |
4 pages |
| Authors:
James W. Moffett; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| Copper toxicity to larvae of the blue mussel Mytilus edulis was quantified in chemically defined media to determine the relationship between concentrations of the free aquo Cu2+ ion and toxicity. The objective was to generate robust relationships to predict the effects of water chemistry on the toxic effects of copper and assess their ecological and regulatory implications. We found a robust relationship exists, suggesting that this species, a key organism ... |
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| Transmission of Intense Femtosecond Laser Pulses into Dielectrics |
26 SEP 2005 |
26 pages |
| Authors:
J. R. Penano; P. Sprangle; B. Hafizi; W. Manheimer; A. Zigler; NAVAL RESEARCH LAB WASHINGTON DC
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| The interaction of intense, femtosecond (fsec) laser pulses with a dielectric medium is examined using a numerical simulation. The simulation uses the 1-D electromagnetic wave equation to model laser pulse propagation. In addition, it includes multiphoton ionization, electron attachment, ohmic heating of free electrons, and temperature dependent collisional ionization. Laser pulses considered in this study are characterized by peak intensities 10(exp 12) to 10(exp 14) W/sq cm and pulse durations ... |
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| Microscale Electrospinning of Polymer Nanowires for Sensing Applications |
SEP 2005 |
18 pages |
| Authors:
Royal F. Kessick; John Fenn; SENTOR TECHNOLOGIES INC GLEN ALLEN VA
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| All project tasks have been completed. Prototype chemical and infrared sensors have been fabricated and tested and the performance parameters (presented below) are extremely promising. In addition a new fiber processing technology based on supercritical fluids has been developed and demonstrated. Finally, new polymeric helical structures have been developed and tested and represent a new technology for microscale sensing and actuation. At this time three journal articles (two in Applied ... |
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Inorganic Chemistry
