http://www.ntis.gov/rss/RSSNTISCategoryList.aspxNational Technical Reports Libraryen(c) 2008, National Technical Information Service. All rights reserved.5http://www.ntis.gov/images/logoRSS.jpghttp://www.ntis.gov110 W pulse power and 0.93 J pulse energy have been obtained with direct resonant pumping of a 1.6 micrometer Er3+ -doped bulk solid-state laser with two-dimensional stacks of 1.5 micrometer InGaAsp/InP diode lasers. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505607This viewgraph presentation revews 50 years of mirror technology concepts at NASA. The emphasis is from the Hubble Space Telescope, to James Webb Space Telescope, and beyond. ...http://www.ntis.gov/search/product.aspx?ABBR=N20090028700In 1992, the U.S. Department of Energy forged partnerships with industry and academia under the Advanced Turbine Systems (ATS) Program to go beyond evolutionary performance gains in utility-scale gas turbine development. Agreed upon goals of 60 perce ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010102157Atomic layer deposition (ALD) was used to deposit an alternative dielectric barrier layer for use in radio frequency microelectromechanical systems (rf MEMS). The layer is an alloy mixture of Al2O3 and ZnO and is proposed for use as charge dissipativ ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506124Aluminum powders have long been used as additives in propellants, pyrotechnics and explosives. Aluminum has a high enthalpy of combustion but relatively low burn rate. Addition of reactive nanocomposite powders can increase the burn rate of aluminum ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506199Numerical study of a 5,900 lb solid propellant thruster plume at an altitude of 118 km is performed using a combined multi-step continuum/kinetic approach. The Navier-Stokes equations are solved for the flow inside the nozzle and the first several me ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506180During the Indian National Gas Hydrate Program Expedition 01 (NGHP01), one of the richest marine gas hydrate accumulations was discovered at drill site NGHP0110 in the Krishna-Godavari Basin, offshore of southeast India. The occurrence of concentrate ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101617This report provides the U.S. Department of Energy (DOE) and the public with information on the level of radioactive and non-radioactive pollutants (if any) that are added to the environment as a result of Princeton Plasma Physics Laboratory's (PPPL) ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009951313Atmospheric turbulence has been shown to cause measurable effects on the propagation of electromagnetic radiation. These effects are significant at both visible/IR and microwave and millimeter wavelengths even though they vary as f7/6, where f is fre ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505717Marines have been commonly referred to as 'lean, mean, fighting machines.' Today, there are 2,112 Marines on weight control. That means that approximately two percent of all Marines on active today are being affected by the current system by which th ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506045This paper presents empirical results of cable noise reduction techniques as demonstrated using bulk current injection (BCI) techniques with radiated fields from 50 kHz - 400 MHz. It is a follow up to the two-part paper series presented at the Asia P ...http://www.ntis.gov/search/product.aspx?ABBR=N20090030527In 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 elevate ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506073Quantum coherence effects in atomic media such as electromagnetically-induced transparency and absorption, lasing without inversion, super-radiance and gain-assisted superluminality have become well-known in atomic physics. But these effects are not ...http://www.ntis.gov/search/product.aspx?ABBR=N20090028797We report a combination of the CDF and D0 measurements of the inclusive single top quark production cross section in the s- and t-channels, (sigma)(sub s+t), in p(bar p) collisions at a center of mass energy of 1.96 TeV. The total integrated luminosi ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963445A laser-diode bar incorporated into an external cavity with a volume Bragg mirror produced 30 W of cw output power within a 20 pm (10 GHz) spectral linewidth (FWHM) centered at 780 nm. The device output power exceeded 90% of that for the free-running ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506103Modeling woven fabrics is challenging due to the need to capture the fabric response at both the macroscopic scale of the fabric and the 'mesoscale' of the yarns that compose the weave. Here, we utilize a continuum-level modeling technique for woven ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505706A theory of generation linewidth of a spin-torque oscillator (STO) based on an in-plane magnetized nanopillar with an anisotropic 'free' magnetic layer has been developed. It is shown that the coherent properties of microwave generation strongly depe ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505876A transducer with a closed heat pipe is provided with a hot surface and a cold surface. The hot surface is in contact with the transducer interior and the cold surface is in contact with a cooler contact area. A fluid is used in the pipe which boils ...http://www.ntis.gov/search/product.aspx?ABBR=ADD020410Cross-correlation and coherence functions are used to look for periodic acoustic components in turbofan engine combustor time histories, to investigate direct and indirect combustion noise source separation based on signal propagation time delays, an ...http://www.ntis.gov/search/product.aspx?ABBR=N20090026572We have performed a joint analysis of the abundance and weak lensing mass estimates of the maxBCG clusters detected using SDSS imaging data. In addition to this data, a prior on the scatter in the mass richness relation derived from demanding consist ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009962101Electrical Resistance Heating (ERH) was applied at Site 1 located at the U.S. Naval Station Annapolis from January to June 2006. ERH was applied to treat soils and groundwater at depths up to 66 ft below ground surface and contaminated primarily with ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506094This cost and performance report is a critical review of technical and performance data from four recent Navy projects and one National Aeronautic and Space Administration (NASA) project involving the use of Electrical Resistance Heating (ERH) for tr ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505879Predictions of quasi steady state DT plasmas in ITER are generated using the PTRANSP code. The plasma temperatures, densities, boundary shape, and total current (9 - 10 MA) anticipated for ITER steady state plasmas are specified. Current drive by neg ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963808A method for crack and damage detection in ceramic composite plate armors is presented. The method uses embedded piezoelectric Lead Zirconate Titanate (PZT) transducers to characterize the vibrational modes of composite armor plates. The amplitudes o ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505638A new type of RF-photonic channelizer is demonstrated which makes use of a pulse replication loop to realize a true time domain correlation receiver. We have demonstrated, for the first time, a one-step channelization of a total bandwidth of 1.3 GHz ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505833A Material Tracking System and Bar-coding System was procured and installed at Kansas Army Ammunition Plant (KSAAP) as part of the Flexible Load, Assembly, and Pack (LAP) facility contract. The material tracking system uses a software program called ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506003We present an rf technique for finding plasma potential for both low and high neutral pressure plasmas in the thin sheath limit. It requires only readily available instrumentation and has the added advantage that the measurement is non-perturbative t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505439The idea of performing creep tests on asphalt mixture beam specimens with the Bending Beam Rheometer (BBR) was investigated in this project. In the first part of the investigation a detailed beam preparation procedure was developed for both laborator ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101388We are designing and fabricating arrays of subwavelength SP structures in metal films and combining these structures with EO polymers to understand the interaction of the EO polymer with the enhanced electric fields of the plasmons. We have designed ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505866Development of microfluidics has focused on carrying out chemical synthesis and analysis in eversmaller volumes of solution. In most cases, flow systems are made of either quartz, glass, or an easily moldable polymer such as polydimethylsiloxane (Whi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505883Quantum mechanical calculations based on density functional theory (DFT) are used to study dynamic behavior of shocked energetic materials (EM). In this work, we present results of quantum molecular dynamics (QMD) simulations of shocked pentaerythrit ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505721An experimental technique is developed to impose a planar lateral confinement in a prismatic specimen (with rectangular cross-section); the setup enabled a controlled and homogeneous stress state with high lateral compressive stresses. A transparent ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505773The ability of computer simulations to accurately resolve dynamic responses of systems has significantly improved over the last decade. Simulations can now be a trusted source of parametric evaluation of complex systems. DARPA funded a program to inv ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505732In order to resolve atmospheric features, such as gravity waves to the degree necessary for accurate optical turbulence prediction, we developed an adaptive version of MM5 that incorporates the NCSU Dynamic Solution Adaptive Grid Algorithm (DSAGA) an ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505962The mechanism by which grain boundaries impede current flow in high- temperature superconductors has resisted explanation for over two decades. We provide evidence that the strain fields around grain boundary dislocations in YBa2Cu3O7-delta thin film ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506015An experimental study on the effects of an externally-imposed transverse acoustic field in a flush shear coaxial jet is presented. In this case the inner jet recess is zero and both the inner and outer jet exit planes coincide. Since recess is a desi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506223Hybrid composite to metal bolted joints are the focus of much research due the inherent advantages that they present. In particular, they are very attractive to designers and engineers alike due to their simplicity and ease of disassembly. However, h ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506081A 2D framework for solving the sheath equations near a dielectric corner has been developed and applied in a 'quasi' 2D fashion to solve for sheath thickness and potential profile. When appropriate, boundary conditions were taken from an HPHall model ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506237The long-term goals of this effort are to assess the effects of tonal (sonar-like) and broadband noise on underwater and in-air hearing sensitivity of individuals of three species of pinniped: the California sea lion, harbor seal, and northern elepha ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505449Resonant diode pumping of the 1.6-micrometer Er3+(1%):YAG laser is reported with the absorbed photon conversion efficiency of 26%. Fluorescence study indicates that upconversion is a dominant mechanism affecting the solid- state laser threshold. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505573Using electromagnetic waves to detect and identify complex structures near the earth's surface remains challenging because of ground conductivity and ground clutter. Powerful computer-based numerical techniques are required to solve canonical propaga ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505941A collective scattering system has measured electron gyro-scale fluctuations in National Spherical Torus Experiment (NSTX) H-mode plasmas to investigate electron temperature gradient (ETG) turbulence. Observations and results pertaining to fluctuatio ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009962142This paper provides a framework for the analysis of error rate performance of maximal ratio combining multi-channel reception of coherent linearly modulated systems over frequency-selective fading channels. Expressions for the error probability are d ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505686A Faraday probe with three concentric rings was designed and fabricated to assess the effect of gap width and probe geometry in a systematic study of the Hall thruster plume. The nested Faraday probe consisted of two concentric collector rings and an ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506235A hybrid prognosis model is being developed for real-time residual useful life estimation of metallic aircraft structural components. The prognosis framework combines information from off-line physics-based, off-line data driven and on-line system id ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505544The goal in this research is to accurately assess the fatigue life of hybrid composite/metal connections focusing upon bolted joints used in removable panels. Experimental testing was performed in flexure fatigue as part of this effort and is essenti ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506051Thermal stress due to heat or cold may impact comfort, the ability to conduct operations, and, potentially, the survival of Warfighters. This report provides background information and methods for characterizing the properties of enclosed spaces (veh ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506097This paper presents the challenges in the ground testing of Hall effect thrusters for plasma spacecraft propulsion applications. Hall effect thrusters by virtue of their high specific impulse can reduce spacecraft station-keeping propulsion mass by a ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506238High power solid state laser systems operating in a pulse mode dissipate the transient and excessively large waste heat from the laser diode arrays and gain material. The heat storage option using Phase Change Materials (PCMs) has been considered to ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506190We present a high yield filling technique of multi-walled carbon nanotubes (MWCNTs), grown vertically on a SiO2 substrate, with magnetic nanoparticles using pulsed laser deposition (PLD). Magnetization measurements in-plane and out-of-plane with resp ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505741Acoustic measurements made using compressional-wave (P-wave) and shear-wave (S-wave) transducers in aluminum cylinders reveal waveform features with high amplitudes and with velocities that depend on the features dominant frequency. In a given wavefo ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101618A series of shock tube experiments performed in the 1970s at the Institute for Aerospace Studies, University of Toronto, led in the discovery of instabilities in relaxing shock structures in noble gases under hypervelocity conditions. The instabiliti ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505555Most III-V nitride light emitting diodes have an n-type down structure with Ga polarity. In such a device, the active layer is grown on top of the n-cladding layer and the p-type cladding layer is grown on top of the active layer. We have analyzed th ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505915The modeling of porous bleed regions as boundary conditions in computational fluid dynamics (CFD) simulations of supersonic inlet flows has been improved through a scaling of sonic flow coefficient data for 90deg bleed holes. The scaling removed the ...http://www.ntis.gov/search/product.aspx?ABBR=N20090027872We considered the feasibility of utilizing High Dimensional Model Representation (HDMR) technique in the stochastic space to represent the model output as a finite hierarchical correlated function expansion in terms of the stochastic inputs starting ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506164The purpose of this project was to create an interactive game to expose high school students to concepts in laser amplification by demonstrating the National Ignition Facility's main amplifier at Lawrence Livermore National Laboratory. To succeed, th ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009964070We report measurements of the low-frequency photon noise and the relative intensity noise of an interband cascade laser as a function of laser current at 30 K and 100 K. Away from threshold, the laser primarily exhibits a frequency-independent photon ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505917We describe the use of quantum-mechanically entangled photons for sensing intrusions across a physical perimeter. Our approach to intrusion detection uses the no-cloning principle of quantum information science as protection against an intruder's abi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505832A study of low discharge voltage Hall thruster operation revealed the existence of two operating regimes. Small variations in cathode flow fraction and magnetic field resulted in sharp changes in discharge current with constant thrust, corresponding ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506241Parton luminosities are convenient for estimating how the physics potential of Large Hadron Collider experiments depends on the energy of the proton beams. I present parton luminosities, ratios of parton luminosities, and contours of fixed parton lum ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963444An impedance analyzer has been used in the characterization of a magnetic induction probe (B-dot probe) for use in plasma. The role of the impedance analyzer was to determine the frequency response of a B-dot probe up to 100 MHz. The probe was specif ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506207We have measured upconversion fluorescence resulting from the excitation of room temperature 1% and 5% Er:YAG by a 1532 nm nanosecond pump source. Measurements of the fluorescence decay from the 4I13/2, 4I11/2, 4F9/2 and 4S3/2 manifolds to the 4I15/2 ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505387Measurements of the heat transfer enhancement effects of concave spherical dimples have been performed under hydrogenoxygen hot-fire conditions in a subscale combustion chamber. Seven configurations were tested with a range of area densities from 15- ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506200High heat flux removal from devices such as Insulated-Gate Bipolar Transistor (IGBT) and Monolithic Microwave Integrated Circuit (MMIC) will be important for future Navy ships. Micro encapsulated phase change material (MEPCM) slurry was used as a hea ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505991An investigation of the mixing enhancement behavior of N2 shear coaxial jets between two injector geometries is presented. A total of 20 cases with one injector geometry and 15 with the other, corresponding to different momentum flux ratios (J's) at ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506218No abstract available. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505918The NAVO MSRC provides Department of Defense (DoD) scientists and engineers with high performance computing (HPC) resources, including leading edge computational systems, large-scale data storage and archiving, scientific visualization resources and ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505627The NAVO MSRC provides Department of Defense (DoD) scientists and engineers with high performance computing (HPC) resources, including leading edge computational systems, large-scale data storage and archiving, scientific visualization resources and ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505907Nonpolar nitride semiconductor materials containing a wide range of structural defects are studied. High quality InGaN quantum wells grown on bulk stacking fault (SF) -free GaN substrates show larger PL intensity and shorter PL lifetime with decreasi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505854A well-known class of organic non-porous compounds, polymethylene bismethonium iodides, undergoes selective capture and release of a,w- diiodoperfluoroalkanes in a dynamic and controlled manner, in solution and from the gas phase. Despite a lack of p ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505435The quasi-static micromechanical damage mechanics originally formulated by Ashby and Sammis (PAGEOPH, 1990) has been expanded in three important ways: (1) An energy density function has been derived that allows a self-consistent inclusion of the effe ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505350The first observation of fast and slow magnetocoriolis (MC) waves in a laboratory experiment is reported. Rotating nonaxisymmetric modes arising from a magnetized turbulent Taylor-Couette flow of liquid metal are identified as the fast and slow MC wa ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963987Off-line and On-line fatigue crack growth prediction of Aluminum 2024 compact-tension (CT) specimens under variable loading has been modeled, using multivariate Gaussian Process technique. The Gaussian Process model projects the input space to an out ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505600A brief review of both near-term and far-term platforms proposed for near-space operations is given. The primary focus of the paper is, however, a review of potential advanced propulsion systems for such long-duration near- space platforms. The basic ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506227Modification of a high energy particle distribution by a spectrum of low amplitude modes is investigated using a guiding center code. Only through resonance are modes effective in modifying the distribution. Diagnostics are used to illustrate the mod ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963535The US Navy is investigating hydrogen fuel cells powered by reformed naval logistic diesel fuel as a means of providing distributed ship service electrical power. Operation on diesel fuel requires a reformer system to remove sulfur and convert the sy ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505568In the laboratory we used an idealized rotorwash flow - an axisymmetric jet impinges normally on a packed bed of cohesionless particles - and measured the spatially varying flow field and entrainment flux under an axisymmetric jet over a range of jet ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505857The point spread function (PSF) describes response of a linear optical imaging system to a point light source (see Point spread function and imaging in turbid medium). This response includes the effects of both the image system itself (lens, mirror, ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505842A master oscillator power amplifier (MOPA) with variable amplifier gain lengths was built to demonstrate power enhancement of an alkali vapor laser. A small signal gain of 0.91 / cm for two different gain lengths was observed. For a 2 cm long amplifi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506024Axial waves predicted by a two-dimensional hybrid numerical model have been used to estimate electron cross field transport due to tilted waves with azimuthal components. Since the radial-axial hybrid simulation cannot model these tilted waves direct ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506232A quantum-mechanically-based potential energy function that describes interactions of dimers of the explosive cyclotrimethylenetrinitramine (RDX) is used to predict polymorphic structures of crystalline RDX. The potential was first used in crystal st ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505714This report addresses physical channel issues related to instream gravel mining on the Umpqua River and its two primary tributaries, the North and South Umpqua Rivers. This analysis constitutes a Phase I investigation, as designated by an interagency ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101887The Proceedings of the Tenth European Meeting on Ferroelectrics (EMF-10) are being published in seven parts (Parts I-VII). The first four parts (Parts I, II, III, and IV) are published in Volumes 301-304 of Ferroelectrics and the last three parts (Pa ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010100042This paper details the synthesis and characterization of Silicon (Si) nanostructured powder with a wide variety of morphologies such as nanoparticles, nanowires, nanotubes, etc., produced by DC plasma arc discharge route. These nanostructures were sy ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505865Weston Geophysical Corp., New England Research, Inc., and several geotechnical consultants conducted the New England Damage Experiment (NEDE) in central Vermont during July 2008. A series of five explosions using charges having yields of 135 and 270 ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505381The performance of density functional theories (DFT) in predicting structural parameters for six conventional energetic materials (EM) over various degrees of compression was examined for a wide range of pressures. The systems studied were nitrometha ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505718The resolution of a homodyne LADAR can be enhanced significantly by applying quantum optical techniques in the receiver. With a quantum image enhancer (QIE) inserted between the receive optics and the detector of a LADAR, an angular cell resolution i ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506209We present a quartz crystal microbalance (QCM) based system for high sensitivity differential sputter yield measurements of different target materials due to ion bombardment. The differential sputter yields can be integrated to find total yields. Pos ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506240Embedded resistors are resistors fabricated inside of printed circuit boards used as an alternative to discrete resistor components that are mounted on the surface of the boards. However, it is difficult to fabricate embedded resistors to the require ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505875We report direct resonant diode pumping of a 1.6-micrometer-Er3+- doped bulk solid-state laser. Using a 1470-nm-single-mode diode laser module to pump the Er:YAG rod, an absorbed photon conversion efficiency of 26% has been obtained in this initial e ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505570Tokamaks, such as International Thermonuclear Energy Reactor (ITER), are sensitive to magnetic perturbations caused by nonaxisymmetric currents external to the plasma. These perturbations can lead to a signicant degradation of connement, but also can ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963532This report documents Part I of a study on the interaction between shock waves and material systems as part of a U.S. Army initiative to better protect individual Soldiers against novel blast threats. The research was conducted using a shock tube fab ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506204Understanding turbulence effects on wave propagation and imaging systems has been an active research area for more than 50 years. Conventional atmospheric optics methods use statistical models to analyze image degradation effects that are caused by t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506014The objective of this research is to develop a modeling, simulation, and design tool for nanocomposites in order to predict, with accepted fidelity, nano-composite behaviors; and to design optimum nanocomposites for specific Army applications such as ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505716Due to quantum confinement, superlattice detectors may conceivably be tuned to detect electromagnetic signatures difficult to detect with technology available today. The challenge in creating new superlattice detectors is in the growth process where ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505828My thesis covers two general circulation problems that involve the stability of large scale oceanic flows and the importance of non-local effects. The first problem examines the stability of meridional boundary currents, which are found on both sides ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506215This report describes a thermal analysis for a power conditioning unit for the M119 A1 howitzer. The analysis includes conduction, convection, and radiation as described by the Army's rigorous environmental standards. The analysis was completed using ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505998Ammunition is often exposed to extreme temperatures and solar radiation during transport, storage and pre-positioning. This is of particular concern in the present theater of operations. There have been documented incidents of failures caused by ther ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505782Nitroaromatic and cyclic nitramine compounds are frequently encountered as energetic residues in live-fire military training ranges. Careful assessment on the redox fate of current and emerging explosives will allow accurate assessment of potential s ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505858In this paper, a summary of our work in the area of tunable microwave circuits based on thin film ferroelectrics is presented. First, a technique is introduced to improve the linearity of thin film ferroelectric tunable capacitors. Measurements show ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505853The single-electron transistor (SET) is one of the best candidates for future nano electronic circuits because of its ultralow power consumption and small size. SET devices operate on the principle of Coulomb blockade, which is more prominent at dime ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505744After a brief review of the characteristics of electrical stress degradation of flexible, amorphous silicon thin film transistors, the implications for various types of flexible circuitry including active matrix backplanes, integrated drivers and gen ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505761Considering the interest in and challenges of using ceramic matrix composites, a full understanding of the physical properties is needed to continue to move the technology forward. A property of interest to the design process is the through thickness ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505960Feasibility of using beamed microwave energy to increase thrust of solid rocket motors during launch is analyzed. Coupling of microwave radiation with internal energies of micron-sized alumina particles and the successive transfer of internal energy ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506210In this paper we examine two couplings that produce time-shifted synchronization in a pair of chaotic oscillators. The couplings do not utilize an explicit time-delay term. We characterize the observed synchronization by determining the dependence of ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505972The unit of action signal company faces serious challenges in keeping its soldiers trained and ready. As the Army transforms to the objective force and becomes more digitized, the signal corps will be responsible for an increasing amount of communica ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505519Fibers incorporated into polymer matrices suffer from poor adhesion at the fiber-resin interface. In ballistic materials such as body armor, it is imperative that the fiber-resin interface is strengthened for superior energy absorbing capabilities. T ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505762In this paper, we present the design of a reconfigurable antenna based on the dynamic tuning of a planar system that consists of a loop antenna, metamaterial spilt ring resonators (SRRs), and heterojunction photo transistors (HPTs). Simulation result ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505855Because the background plasma electrons neutralizing the ion beam current inside the beam are streaming relative to the background plasma electrons outside the beam, the background plasma can support a two-stream surface-mode excitation. Such surface ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009963805Advanced laser stabilization techniques now permit one to lock laser frequencies onto line centers of natural atomic/molecular resonances with unprecedented precision and accuracy, leading to improved visible optical frequency standards. A novel appr ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505521In general, it has long been known that the hardness of ceramics correlates with gross impact performance, however, not to a degree useful for materials development. Wilkins, Cline and Honodel, 1969, were the first to point out the apparent importanc ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505731This TOP provides methods for planning, providing instrumentation, and execution of testing of Army/DOD Materiel to determine the effects of Vertical Component High Altitude Electromagnetic Pulse (VHEMP) Environment on the safety and/or reliability o ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505640This research has two main components: (1) a new, wavelet-based cascade model for intermittent (uneven) distributions of objects in terrestrial environments and (2) a complementary analysis of intermittent wave scattering. Taken together, these devel ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506074The Oceans 2000 MTS/IEEE conference encompassed more than 350 technical presentations in 113 sessions. The papers presented are recorded on a single searchable CD. Topics cover a variety of subjects from theoretical and applied ocean technology to bu ...http://www.ntis.gov/search/product.aspx?ABBR=ADM001244A low cost test capability was developed at the NASA Glenn Research Center 1- by 1-Foot Supersonic Wind Tunnel (SWT), with a goal to reduce the disturbance caused by supersonic aircraft flight over populated areas. This work focused on the shock wave ...http://www.ntis.gov/search/product.aspx?ABBR=N20090029905Atomic layer deposition (ALD) techniques were used to fabricate W/Al2O3 superlattices with high X-ray reflectivity on flexible Kapton polyimide and polyethylene naphthalate (PEN) polymer substrates. Reflectivities of 78% and 74% at A=1.54 were measur ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506125