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.govAn illumination grade warm white (WW) LED, having correlated color temperature (CCT) between 2800 K and 3500K and capable of producing 800 lm output at 100 lm/W, has been developed in this program. The high power WW LED is an ideal source for use as ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131053606The long-term goal is the acquisition of an in situ, 32-channel digitizer capable of sampling at a rate of 8kHz, with a maximum depth rating of 1 km and data storage capacity sufficient to support continuous recording for a 10-day deployment. This sy ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574820A well-known lecture demonstration consists of pulling a spool by the free end of a string wrapped around its inner diameter. By pulling at different angles relative to the floor, the spool can be made to roll either toward or away from you. This is ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574906The over-all goal of this research is the development of an accurate and reliable propagation model applicable to environments which exhibit strong range dependence in all three spatial dimensions. The objective of this work is to gain an understandi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574801The long-term goal is to accurately describe the spatial and temporal distributions of fish and quantify the mid-frequency clutter characteristics of fish. The objective is to conduct a new class of quantitative studies of acoustic scattering by swim ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574654Develop improved, more reliable air and underwater acoustic transducers, encompassing a wide frequency spectrum from 10 Hz to 100 MHz with systematic and conjunct studies on materials, devices, modeling, and electronics. Develop high performance piez ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574199A passive structural logic system composed of bistable snap-through elements and synthesized into structural system with both high stiffness and high damping characteristics was developed. This system was demonstrated to achieve high damping performa ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574780This report summarizes recent progress made on the AVIATR contract Task Order 3, Condition Based Maintenance plus Structural Integrity (CBM+SI) - Basic Phase. The main objective of this task is to document the requirements for both CBM+ and the Aircr ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573734Aeroacoustic measurements of the 11 % scale full-span AMELIA CESTOL model with leading- and trailing-edge slot blowing circulation control (CCW) wing were obtained during a recent test in the Arnold Engineering Development Center 40- by 80-Ft. Wind T ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003179The long-term goals of this research are to understand the statistics of acoustic fields in both deep and shallow water ocean environments. The primary objective of this work is the development of accurate, and computationally efficient, reduced-phys ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574824The direct current produced from the Van de Graaff (VDG) at the Air Force Research Laboratory (AFRL) has been measured and analyzed. The current pulse produced from the VDG is oscillatory. Experimental data show complete damping occurs after 8 oscill ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574271We report theoretical and experimental investigations of infrared absorption characteristics for PbSe colloidal quantum dots in defect-free photonic crystal (PC) cavities, via Fano resonances. Angle and polarization independent transmission and absor ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574908The proposed research will address the fundamental theoretical issue of noise compensation mechanisms in the vocal communication of marine mammals. Noise compensation mechanisms are important for improving signal transmission with an energy limited s ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573678In this report, we study the effectiveness of hydrogen plasma surface treatments for improving the electrical properties of GaSb/Al2O3 interfaces. Prior to atomic layer deposition of an Al2O3 dielectric, p-GaSb surfaces were exposed to hydrogen plasm ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573732System noise assessments of a state-of-the-art reference aircraft (similar to a Boeing 777-200ER with GE90-like turbofan engines) and several hybrid wing body (HWB) aircraft configurations were recently performed using NASA engine and aircraft system ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003187Propagation and reverberation of acoustic fields in shallow water depend strongly on the spatial variability of seabed geoacoustic parameters, and lack of knowledge of seabed variability is often a limiting factor in acoustic modeling applications. H ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574834An automatic Inductive Voltage Divider (IVD) characterization method that can measure linearity by comparing IVD's with different structures is suggested. Structural models are employed to decompose an error vector into components that represent each ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575003At the United States Academy there are several engineering majors, including Systems Engineering. This program offers excellent systems integration education. In particular the major concentrates on control of electrical, computer and mechanical syst ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574988Photoluminescence (PL) spectroscopy and infrared(IR)spectroscopy have been used to measure the surface condition of TiO2 powder. The adsorption of electron acceptor and donor molecules has been shown to modify band bending at the TiO2 surface. Single ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574813On August 5, 2012, the Mars Science Laboratory (MSL) entry capsule successfully entered Mars' atmosphere and landed the Curiosity rover in Gale Crater. The capsule used a reaction control system (RCS) consisting of four pairs of hydrazine thrusters t ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003218In the Golden Gate (San Francisco) inlet, tidal currents are dominant and have complex spatial and temporal variations owing to the large size of estuary connected through the narrow channel and the shallow ebb shoal (bar) at the mouth. To capture su ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573936The trajectory, travel time and relative approach velocity of a pursuer tracking a prey along a simple curve of pursuit are deduced using basic principles of two-dimensional kinematics. While such curves are well known in the mathematics literature, ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574898The flux formulation of propagation has been used to calculate reverberation, target echo, and signal excess very efficiently in a model developed by Harrison called Artemis. This model is used in the operational planning aid MSTPA at CMRE. Propagati ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574863Optical Interferometry has long been limited by low SNR making it nearly impossible to measure the small visibilities required to make resolved images. Although the SNR exists in the raw data, much SNR is lost in the conventional squared-visibility p ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573780The collision of a ball with the end of a barbell illustrates the combined conservation laws of linear and angular momentum. This paper considers the instructive but unfamiliar case where the ball's incident direction of travel makes an acute angle w ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574900Multi-constituent particulate composites consist of individual particles of more than one material dispersed throughout and held together by a polymer binder. The mechanical and physical properties of the composite depend on the mechanical and physic ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573743Three methods have been used to experimentally determine the roughness function (DU+) for several rough surfaces. These include the rotating disk, the towed plate, and the velocity profile methods. The first two are indirect methods in as much as the ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573946Recent studies employing graph theoretic techniques from Complex Networks revealed the co-evolution of emergent minimal contact cycles and load-bearing force chains as mesoscopic structures that form the basic building blocks of self-organization. Th ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574037We show that (a) the conformal properties of Anti-de Sitter (AdS) space, (b) the properties of a field theory in one dimension under the full conformal group found by de Alfaro, Fubini and Furlan, and (c) the frame-independent single-variable light-f ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074192Research on the cosmic accelerating expansion from both observational and theoretical sides has been proceeding intensely for the past dozen years. Within the framework of general relativity, the cosmic acceleration requires that the universe's curre ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074210During its first year of data taking, the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope has collected a large sample of high-energy cosmic-ray electrons and positrons (CREs). We present the results of a directional analysis o ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074209The cross-correlation between surface temperature and subsurface velocity is presented for water undergoing evaporative convection. The surface temperature measurements were obtained via quantitative infrared imaging, and the velocity measurements we ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573945In the following overview the properties and nature of all discovered candidates for the open charm D and D(sub 8) states are discussed. The figures show the respective mass spectra for D and D(sub 8) states. The circles represent the observed candid ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074214We discuss the relevance of directional detection experiments in the post-discovery era and propose a method to extract the local dark matter phase space distribution from directional data. The rst feature of this method is a parameterization of the ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074224The scientific objective of the deep-water ambient noise research is to measure the second-order spatial statistics of the ambient noise in the deepest oceans as a function of depth, from the sea surface to the seabed. Regions of interest include the ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574805This technical note explores the design of the monolithic neodymium (Nd): yttrium aluminum garnet (YAG) laser used in the diode-pumped laser ignition system (DPLIS). Emphasis is placed on the divergence of the output beam and the dependence of the ou ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573848Low-temperature photoluminescence (PL) has been performed on a set of specially designed In0.27Ga0.73Sb/InxAl1 xAsySb1 y multiple quantum well (MQW) heterostructures grown by molecular beam epitaxy in order to provide a measure of the conduction band ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574235Diamond was studied as a possible radiation hard technology for use in future high radiation environments. With the commissioning of the LHC expected in 2010, and the LHC upgrades expected in 2015, all LHC experiments are planning for detector upgrad ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131053059The long-term goal of this effort is to produce a resource to educate the public on the basic science of sound in the sea and how it is used to communicate, navigate, and explore the oceans. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573904Simple LR and RC circuits are familiar to generations of physics students as examples of single-exponential growth and decay in the relevant voltages, currents, and charges. An element of novelty can be introduced by connecting two (instead of one) L ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574982Nonlinear parabolized stability equations and secondary instability analyses are used to provide a computational assessment of the potential use of the discrete roughness elements (DRE) technology for extending swept-wing natural laminar flow at chor ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003223The overall objective of this multi-faceted program is to develop epitaxial growth systems that meet a goal of 75% (4X) cost reduction in the epitaxy phase of HB-LED manufacture. A 75% reduction in yielded epitaxy cost is necessary in order to achiev ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131053618Measurements have been conducted at the University of Virginia Supersonic Combustion Facility in configuration C of the dual-mode scramjet. This is a continuation of previously published works on configuration A. The scramjet is hydrogen fueled and o ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003230The long-term goals are: (1) To develop a method of modeling sound propagation in an environment with multi-scale inhomogeneities, which preserves the efficiency and intuitive qualities of the ray theory but is free from spurious environmental sensit ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574849In order to understand the mechanical behavior of granular deposit subjected to high-speed projectile impact, we perform both physical experiments and grain-scale numerical simulations. In the high-speed impact experiment, we adopted a new technology ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574534Modern fighter/attack aircraft rely on vortex flow to increase lift at moderate to high angle of attack alpha. Therefore, a great deal of interest exists in understanding and predicting the vortical flow structure generated by swept wings. One form o ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575009Understanding the mechanical behavior of woven Kevlar fibers at high loading rates is needed to develop material models that mathematically represent the deformation and failure for computer codes that are being developed or used to simulate high loa ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574531The nature of dark matter is a fascinating mystery that continues to be unsolved. Direct detection expeiments offer the possibility of determining the precise interactions of a dark matter (DM) particle with nuclei. The experiments use different targ ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074218Predictions of full-scale ship resistance and powering are made for antifouling coating systems with a range of roughness and fouling conditions. The estimates are based on results from laboratory-scale drag measurements and boundary layer similarity ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575004The goal of this work is to further develop and test models of volume scattering by utilizing the existing suite of instrumentation previously developed at APL- UW for the study of high-frequency acoustics. These models include perturbation models ap ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574865The long-term goals are to develop novel techniques to measure and predict, through modeling, the effect of sound on the marine environment. Modeling includes acoustic sources, propagation and the interaction of sound with animal behavior models. Det ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573798The overall long-term goal for this project is to enhance the Navy's predictive capabilities in uncertain ocean environments. This project is a collaboration with Dr. Robert Zingarelli at the Naval Research Laboratory - Stennis Space Center (NRL-SSC) ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574837We use angle-resolved photoemission spectroscopy to study twinned and detwinned iron pnictide compound NaFeAs. Distinct signatures of electronic reconstruction are observed to occur at the structural (T(sub S)) and magnetic (T(sub SDW)) transitions. ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131043866NASA 's Get Away Special (GAS) program permits experimenters to place small, self-contained, autonomously controlled experiments in the Space Shuttle's cargo bay. In some experiments the need exists to start recording data just before launch without ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575001Determining the speed of a ball as a function of its height after it is launched straight upward in the absence of fluid resistance is a standard problem treated at all levels of introductory physics. Inclusion of drag in the problem is seldom covere ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574899To measure the new SEMATECH 9 nm node Intentional Defect Array (IDA) and subsequent small, complex defects, a methodology has been used to exploit the rich information content generated when simulating or acquiring several images of sub-wavelength-si ...http://www.ntis.gov/search/product.aspx?ABBR=PB2013108395The long-term goal is to understand and predict key properties of the signal intensity vector field in forward propagation with emphasis on mid- frequency, shallow water propagation. Because of enabling technologies involving MEMS and bio-inspired tr ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574828Lithium tetraborate (Li2B4O7 or LTB) is a promising material for both radiation dosimetry and neutron detection applications. LTB crystals can be grown pure or doped with different impurities including transition-metal and rare-earth ions. Research i ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574669In summary, the highly interdisciplinary program has addressed successfully the challenging technical goals set forth to develop and validate an acoustic wave propagation model using well understood and documented computational techniques that track ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574400Grid modification methods have been under development at NASA to enable better predictions of low boom pressure signatures from supersonic aircraft. As part of this effort, two new codes, Stretched and Sheared Grid - Modified (SSG) and Boom Grid (BG) ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003237The Naval Research Laboratory's Trace Element Accelerator Mass Spectrometer (NRL-TEAMS) system offers a unique opportunity to develop a new type of time-offlight (TOF) SIMS. This opportunity derives from use of a Pretzel magnet as a recombinator and ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574329Sizable amount of heavy-quarkonium events can be produced through W-boson decays at the LHC. Such channels will provide a suitable platform to study the heavy-quarkonium properties. The improved trace technology, which disposes the amplitude M at the ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074220We explored ultracold gases with seven projects during grant support. The supported research has resulted in 18 published articles, two of which are in Nature Physics, and 25 invited talks by the PI and postdocs. One of notable successes is the proje ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574554The long-term goal of this effort is to educate the public on the basic science of sound in the sea, how people and animals use underwater sound to accomplish many of the tasks for which we use light in air, and how sound in the ocean affects marine ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573925The Reynolds number similarity hypothesis of Townsend The Structure of Turbulent Shear Flow (Cambridge University Press, Cambridge, UK, 1976) states that the turbulence beyond a few roughness heights from the wall is independent of the surface condit ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575012Dark matter particle annihilation or decay can produce monochromatic gamma-ray lines and use gamma-ray background. Flux upper limits are presented for gamma-ray use gamma-ray background from 4.8 GeV to 264 GeV obtained from two years of Fermi Large A ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074229The long-term goal of this project is to obtain quantitative understanding of the physical mechanisms governing broadband (50 Hz to 50 kHz) acoustic propagation, reflection, refraction, and scattering in shallow water and coastal regions in the prese ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574797The long term goals of this effort are (i) the development of a unified parameterization for the marine boundary layer; (ii) the implementation and evaluation of this new parameterization in the US Navy NOGAPS model; and (iii) the transition of this ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574019We present first-year results from a two-year study on a novel, inexpensive, passive, wireless solution for performing nondestructive evaluation on the structural integrity of aging aircraft. Compact, frequency- selective, backscatter transponders ha ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574497We present second-year results from a two-year study on a novel, inexpensive, passive, wireless solution for performing nondestructive evaluation on the structural integrity of aging aircraft. Electro-mechanical resonant phenomena in barium strontium ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574498The ability to predict the sound field in shallow water is constrained by the knowledge of the geoacoustic properties of the bottom. The long term objectives of this research project are related to the investigation of experimental methods and invers ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574809An experimental investigation was performed to study the propulsion airframe aeroacoustic installation effects of a separate flow jet nozzle with a Hybrid Wing Body aircraft configuration where the engine is installed above the wing. Prior understand ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003185An active analog canceller system is implemented to maximize the dynamic range of a two-tone nonlinear measurement, a common test for nonlinear radio frequency behavior. The canceller uses active feedforward cancellation, controlled by a fully automa ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574839Time and space dependent radiance distributions at the sea surface are a function of the shape of the incident distribution on the surface, modification by the sea surface itself from topography and transmission characteristics, and alteration by the ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574430The Massachusetts Institute of Technology undertook to design, fabricate and test a prototype compact superconducting proton cyclotron which addressed all fundamental design and performance issues for a cyclotron at a final energy of 250 MeV and fina ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574309Assessing the noise hazard of high level impulse sounds created by friendly and enemy weapons is of critical importance since hearing loss negatively impacts mission success and unit readiness, and creates a costly common Soldier disability. Noise ha ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573840Polymers are increasingly used in impact and complex high rate loading applications. Generally, the mechanical response of glassy polymers under high strain rates has been determined in compression. Some research programs have studied the combined ef ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573739Optically based sensing provides advantages over electronic sensing because optical spectra can uniquely finger print a chemical compound, significantly reducing false alarms and simplifying the detection process. In addition, light can easily be dir ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574478This paper presents an analysis of the slat noise for Hybrid Wing Body (HWB) aircraft, based on a database from a 3% scale wind tunnel test. It is shown that the HWB slats are one of the dominant noise components, characterized by its broad spectral ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003186The first successful demonstration of picosecond ballistic imaging using a greater-than-10 picosecond-pulse-duration laser in diesel sprays is reported. This technique uses an optical Kerr effect shutter constructed from a CS2 liquid cell and a 15 pi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574548The first year of this research program developed the foundation for Radioluminescence Imaging (RLI) and Radioluminescence Tomography (RLT). The second year of this research program, detailed in this report, was dedicated to optimizing the instrument ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574280The long-term goals of the work are to measure the influence of surface wave breaking on imaging across the surface and develop measurements and models of breaking statistics as input to the interpretation and modeling of oceanic radiance measurement ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574184In the past year, we have completed the task of adapting the cell capture technology for breast cancer CTC capture, identification and characterization. We have also completed the task of laser-scanning based imagining of samples and implemented the ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574570The objectives are: (1) Integration of phenomenological components of the Biot plus grain contact physics models, to reconcile the physical constants and processes, with a view to reducing the number of input variables, (2) a comprehensive model for ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574823The overarching, long-term goal of the study is to explore the profound effect of aerosol-water interaction both on radiation propagation in, and the thermodynamic structure of, the marine boundary layer. Specific goals are: 1) compile a climatology ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574479A typical lightning discharge produces an intense 20 gigawatt electromagnetic (EM) pulse of 50 to 150 (caret)s duration. A significant portion of this energy propagates upward where it interacts with the ambient electrons in the collisional lower ion ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573900A small gas turbine performance modelling and testing project has been completed as part of a Divisional Enabling Research Program (DERP). The main objective of the program was to enhance DSTO's capability in understanding and modelling the thermodyn ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574835A field deployable ruggedized tunable diode laser absorption spectroscopy (TDLAS) device fiber coupled to a pair of 12.5' Ritchey-Chretien telescopes was used to study atmospheric propagation for open path lengths of 100 to 1,000 meters to estimate a ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574766The long-term goal is to improve our understanding of heat and moisture exchange in the tropics through direct estimates of the fluxes and their related mean variables. The flux of heat across the coupled boundary layers is primarily accomplished by ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574454We have introduced defects in ZnO epitaxial thin films by swift heavy (expn 107)Ag(expn 9+) ion irradiation and investigated systematically their magnetic, electrical and optical properties. Oxygen annealed ZnO films are epitaxial single crystals tha ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573953Consider the following problem. A frictionless, massive piston partitions an insulated box vertically into two parts. The upper compartment is evacuated, while the lower contains an equilibrated ideal gas. A weight is suddenly placed on the piston. H ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574894Twenty-one 1,000W tungsten-halogen FEL lamps were chosen to become part of the OSPREy lamp library. Nine lamps were calibrated by NIST, while the rest are uncalibrated, but seasoned lamps (by the supplier). These lamps were operated for periods rangi ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003509A laser-illuminating imaging system operating in the presence of atmospheric turbulence will encounter several sources of noise and diffraction induced errors that can make postprocessing the images difficult. As the beam propagates, turbulence induc ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574516The United States Naval Academy is an undergraduate school with a successful engineering program. An underlying philosophy in the Systems Engineering Department is to emphasize hands-on experience while maintaining a solid theoretical background. To ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574991The Aeroelastic Prediction Workshop brought together an international community of computational fluid dynamicists as a step in defining the state of the art in computational aeroelasticity. The Rectangular Supercritical Wing (RSW) was chosen as the ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003303My long term goals are the exploitation of physics for the solution of significant problems in oceanography. My interests generally lie in the direction of optics and laser interactions in the ocean. Our goal is the rapid and accurate measurement of ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574200The Lobster Eye X-Ray Imaging Underwater Scatterometer (LEXIUS) being developed by Physical Optics Corporation (POC) is an underwater X-ray imager/scatterometer system for high-quality imaging of mines and other objects buried in seabed sediment. The ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574357Presence of plasma turbulence can strongly influence propagation properties of electromagnetic signals used for surveillance and communication. In particular, we are interested in the generation of low frequency plasma turbulence in the form of coher ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574444Marine Mammal sensory systems have evolved to effectively use acoustic energy in the oceans. Our objectives are to develop a basic understanding of hearing and echolocation so that knowledge can then be applied to the solution of practical problems a ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573672My long-term research goals are: (1) The characterization, understanding, and prediction of the statistics (mean, variance and coherence) of low-frequency acoustic signals and ambient noise in the littoral zone. The signal statistics are primarily in ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574815Detailed knowledge of the internal structure of high-enthalpy flows can provide valuable insight to the performance of scramjet combustors. Tunable Diode Laser Absorption Spectroscopy (TDLAS) is often employed to measure temperature and species conce ...http://www.ntis.gov/search/product.aspx?ABBR=N20130004498We demonstrate control of the carrier density of single phase anatase TiO(sub 2) thin films by nearly two orders of magnitude by modulating the growth kinetics during pulsed laser deposition, under fixed thermodynamic conditions. The resistivity and ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131043848Advanced technologies derive many of their capabilities from the advanced materials that they are made from. Complex oxides are a class of materials which are driving technological advancement in a host of different directions. These highly functiona ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573951Quantum wells of InGaSb clad by AlGaSb were grown by molecular beam epitaxy. The InGaSb is in compressive strain, resulting in a splitting of the heavy-and light-hole valence bands and an enhancement of the mobility. The mobility was found to increas ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574021The long-term goal of this work is to better understand and model reverberation, target echo, and clutter in shallow water environments, and to develop techniques for Rapid Environmental Assessment (REA) and environmentally adaptive sonar. The curren ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574838A Presentation is given on Modeling Contact Line Dynamics in Evaporating Menisci. ...http://www.ntis.gov/search/product.aspx?ABBR=N20130004357This project, with Antoinette Tordesillas of U of Melbourne, investigated models for the upper soil surface and its response to applied loads. We have examined key aspects above, experimentally and with computer simulations. We developed new micromec ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574031We have recently established, in close collaboration with experimentalists (from geology, physics, geotechnical and agricultural engineering), a comprehensive first-of-a-kind knowledge base for state-of-the- art data, characterization and modelling o ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574174We report on the design and performance of multi-stack InAs/InGaAs sub-monolayer (SML) quantum dots (QD) based infrared photodetectors (SML-QDIP). SML-QDIPs are grown with the number of stacks varied from 2 to 6. From detailed radiometric characteriz ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574857The focus of this research is on how to incorporate an understanding of short-term variability in the oceanographic environment and source/receiver motion into the design and performance characterization of underwater acoustic, diversity-exploiting, ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574869The radio approach for detecting the ultra-high energy cosmic neutrinos has become a mature field. The Cherenkov pulse in radio detection originates from the charge excess of particle showers due to Askaryan effect. The conventional way of calculatin ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074201When surface flow impinges on orography with horizontal scales of1- 500 km, a variety of mesoscale dynamical responses can result, including gravity waves, upstream blocking, flow splitting and lee vortices. These dynamics produce important drag forc ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574451National Measurement Institutes have traditionally used bootstrapping or build-up techniques to determine the ac-dc difference of high- voltage thermal converters (HVTCs) in terms of the ac-dc difference of lower- voltage converters. We describe a me ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574993We derive bounds on the dark matter annihilation cross-section for low-mass (5- 20 GeV) dark matter annihilating primarily to up or down quarks, using the Fermi-LAT bound on gamma-rays from Milky Way satellites. For models in which dark matter-Standa ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074213Well-characterized solid-state laser materials are evaluated for performance in optical refrigeration as well as radiation-balanced laser systems. New figures-of-merit are developed and applied to ytterbium-doped materials. Superior performance is pr ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574897The project objective was the discovery of new ligands for performing metal ion separations. The research effort entailed the preparation of new metal ion complexing agents and polymers and their evaluation in metal ion separation processes of solven ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131041406The PI's research program in nonlinear wave propagation is broad based and very active. There have been a number of important research contributions carried out as part of the effort funded by the Air Force. During the period 1 March 2009 -- 30 Novem ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573718For many years, the 6.1 basic research communities have focused on the effects of internal waves on temporal coherence; whereas, Navy applied programs are more concerned with the randomizing effect of the combination of bottom bathymetry variations a ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574833Random variability in shallow water will induce variability in a propagating acoustic field. The general long-term goal of this research is to quantify how random variability in the ocean environment translates into random variability in the acoustic ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573905The objective of the effort was to develop mathematical algorithms and corresponding efficient numerical simulation tools for modeling propagation of acoustic waves through the human head, and, subsequently, to apply these tools to simulate energy tr ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574401Our goals are to understand the nature and causes of acoustic signal fluctuations in the shallow water environment. This will allow prediction of acoustic system performance and exploitation of acoustic signal properties. Here, signal means any ident ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574358This proposed research seeks to identify, explain, and ultimately predict, the factors that significantly alter the operational effectiveness of underwater acoustic communications through experimental work and theoretical analysis. The long-term goal ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574796Non-intrusive hydroxyl radical (OH) planar laser-induced fluorescence (PLIF) measurements were obtained in configuration C of the University of Virginia supersonic combustion experiment. The combustion of hydrogen fuel injected through an unswept com ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003219Pose estimation using a bank of filters and a pose search algorithm approach was performed in both the digital and optical domains sub-degree standard deviations in accuracy. The digital routine required less image processing than the optical method. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574398We demonstrate rapid tuning of the emission frequency of a room-temperature mid-infrared quantum cascade laser by external optical pumping. Emission frequency tuning over 0.3 cm(expn -1) (10GHz) has been achieved for a lambda = 9 micro m device by op ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573723The equations of motion of a puck sliding frictionlessly inside a parabolic bowl can be straightforwardly deduced using the conservation laws of mechanical energy and angular momentum. But the solution of these equations requires that they be recast ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574905Recent experiments on nanostructured materials, such as nanoparticles, nanowires, nanotubes, nanopillars, thin films, and nanocrystals have revealed a host of ultra-strength phenomena, defined by stresses in a material component generally rising up t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573756Our long-term interests involve the possibility that biological activity can influence acoustic scattering at the water column-seabed interface and the propagation of sound in and over a sandy substrate in a shallow-water, coastal, marine environment ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573791Pinnipeds (seals, sea lions, and walruses) are amphibious marine mammals that are susceptible to coastal anthropogenic noise. The long-term goals of this effort are to improve understanding of (1) the sound detection capabilities of several pinniped ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573790No abstract available. ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074227Our long-term scientific goal is to understand the basic physics of low-frequency long-range sound propagation in the ocean, and the effects of environmental variability on signal stability and coherence. We seek to understand the fundamental limits ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574803Holloman Air Force Base houses the 10 mile long Holloman High Speed Test Track (HHSTT) in New Mexico and can run hypersonic experiments at speeds up to 10,000m/s. Tested objects are loaded onto sleds, which are connected to the track by 'slippers' th ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573808An acoustic analogy is developed based on the Euler equations for broadband shock-associated noise (BBSAN) that directly incorporates the vector Green s function of the linearized Euler equations and a steady Reynolds-Averaged Navier-Stokes solution ...http://www.ntis.gov/search/product.aspx?ABBR=N20130005547There has been and continues to be considerable discussion in the educational community about different ways of relating the concepts of work and energy in introductory physics. The present article reviews a consistent and streamlined treatment of th ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574901This document collects papers delivered at a conference on variable- resolution modeling and the related issue of developing integrated hierarchies of models. The conference was sponsored by the Defense Advanced Research Projects Agency (DARPA) and t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573928We consider the possibility that the relative phase in quantum mechanics plays a role in determining measurement outcome and could therefore serve as a 'hidden' variable. The Born rule for measurement equates the probability for a given outcome with ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574345In order to demonstrate multi-physics coupling in nuclear reactor simulations, the PROTEUS-SN (SN2ND) neutronics code is in the process of being coupled to the Nek5000 fluid dynamics solver in order to simulate temperature, density, and power feedbac ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131079136Laser cooling of bulk matter uses thermally assisted fluorescence to convert heat into light and can be interpreted as an optically pumped laser running in reverse. Optical pumping in such devices drives the level populations out of equilibrium. Nont ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574896We report recent advancements of the agglomerated multigrid methodology for complex flow simulations on fully unstructured grids. An agglomerated multigrid solver is applied to a wide range of test problems from simple two-dimensional geometries to r ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003216Boundary-layer receptivity and stability of Mach 6 flows over smooth and rough seven-degree half-angle sharp-tipped cones are numerically investigated. The receptivity of the boundary layer to slow acoustic disturbances, fast acoustic disturbances, a ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003312The outer New Jersey shelf has, over the past 25+ years, evolved into a premier natural laboratory for Office of Naval Research efforts to understand the geology and the acoustic response of the seabed in shallow water environments. In great measure ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574860RFID systems are an important component in the effort to increase the efficiencies of the logistics supply chain for the U.S. Department of Defense. While the U.S. DoD has mandated the use of RFID tags for its suppliers, the technology has not always ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574393A key problem in making precise perturbative QCD predictions is to set the proper renormalization scale of the running coupling. The conventional scale-setting procedure assigns an arbitrary range and an arbitrary systematic error to fixed-order pQCD ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131074193No abstract available. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573839A variety of image registration techniques have been investigated for applications such as image analysis, fusion compression, enhancement, and creating mosaics. In particular, robust registration is a key component of successful multi-frame processi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574493LONG-TERM GOALS: To develop and instrumentation package in order to examine the hearing of as many marine mammals and species as possible in order to develop an understanding of the normal hearing capabilities of marine mammals. To advance the techno ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573671When introducing linear collision problems, physics texts contrast the elastic and inelastic cases. This distinction is useful because, for an interaction between two bodies in one dimension, equality of the kinetic energies and linear momenta enable ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574907Successful execution of the flight phase of the Superboom Caustic Analysis and Measurement Project (SCAMP) required accurate placement of focused sonic booms on an array of prepositioned ground sensors. While the array was spread over a 10,000-ft-lon ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003184The waveguide invariant summarizes the pattern of constructive and destructive interference between acoustic modes propagating in the ocean waveguide. For many sonar signal-processing schemes, it is essential to know the correct numerical value for t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574061Work on the hearing of animals while they echolocate (Supin et al, 2008: Nachtigall et al 2008) has demonstrated that hearing sensitivity changes with echolocation condition. False killer whales, bottlenose dolphins (Li et al, 2012) and harbor porpoi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573673The development of new geoacoustic inversion methods, their use in the analysis of shallow water experimental data, and evaluation of geoacoustic model and parameter uncertainties including the mapping of these uncertainties through to system perform ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574847The primary long-term goal is to measure and model high-frequency acoustic propagation in the presence of surface gravity waves and breaking waves to better understand the effects of surface reverberation on shallow water, underwater acoustic communi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574830The long-term goals of this research are to: (1) Develop and establish direct numerical simulation (DNS) methods for flow-induced vibration of flexible structures, (2) Develop a theory that connects the hydrodynamic parameters of the wake and the str ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574862The main objective of this 3-year project is to grow high quality Bil3 single crystals (>1cm3 in volume) via a high temperature modified Bridgman crystal growth technique. We will then test and analyze the crystals using a variety of techniques to de ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574009A well-known textbook problem treats the motion of a particle sliding frictionlessly on the surface of a sphere. An interesting variation is to consider what happens when kinetic friction is present. A rich variety of curves of upsilon (theta) are po ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574909Prototype lighting panels and luminaires were fabricated using DuPont Displays solution-processed small-molecule OLED technology. These lighting panels were based on a spatially-patterned, 3-color design, similar in concept to an OLED display panel, ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131053620One research goal developed from conducted shallow water (SW) acoustic transmission experiments in sandy-silty areas revealed a nonlinear power law frequency-dependent attenuation at lower frequencies consistent with results reviewed in 2,3 the obser ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573906LONG-TERM GOALS: To develop and validate a regional and global nowcast capability for ocean noise. The ambient noise field is, of course, a key part of the marine mammal habitat, and in turn can inform regulatory decisions by conservationists. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573789Fossil fuels are, by their very nature, finite resources. There are, however, numerous renewable energy sources that should be taken advantage of. One of the most abundant energy sources is also the most difficult to efficiently collect on Earth -- s ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573816By the time this Proceedings is published, almost 2 years will have elapsed since the NASA-U.C. Berkeley Conference on Spatial Displays and Spatial Instruments held August 31- September 3, 1987, at the Asilomar Conference Center in Pacific Grove, Cal ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573736The long term goals of this research are to understand the statistics of acoustic fields in deep water ocean environments. At long ranges, broadband receptions consist of early ray-like arrivals and a finale that is best described in terms of the low ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574807A graphical framework is used for statistical analysis of the results from an extensive N-version test of a collection of Reynolds-averaged Navier-Stokes computational fluid dynamics codes. The solutions were obtained by code developers and users fro ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003238The long term goal of this research is to provide a unified statistical theory for ocean-acoustic measurements made after stochastic propagation and scattering that accounts for both the temporal and spatial coherence of the received field. Such a th ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574861LONG-TERM GOALS: To build an ecological modeling framework that facilitates understanding of the at-sea condition and health of various species of marine mammals. This project will develop statistical tools to allow mathematical models of the populat ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573920Semiconductor lasers are key elements in optical technologies, being coherent light sources in fiber optics communications, optical data storage, life sciences applications, material processing, and sensing. They have a huge economic impact and are c ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573997For practical nuclear engineering applications, multi-scale analysis by adopting the combined use of different scale computational tools, such as system thermal-hydraulics and CFD codes is vital when three-dimensional effects play an important role i ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131079137Nanocrystalline (NC) textured Mn0.5Zn0.6Fe1.9O4 (MZFO) films, grown at room temperature on both isostructural and non-isostructural substrates, show magnetization values significantly suppressed from epitaxial MZFO films. X- ray absorption spectrosco ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573859The long-term goals of the research are to investigate the important mechanisms involved in the interaction of current with axisymmetric or cylindrical bodies, which are tethered or free to respond to the fluid forcing. We intend to undertake studies ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574295A measurement bridge to calibrate inductive voltage dividers has been developed at the National Institute of Standards and Technology. The bridge is based on the straddling technique and performs self-calibration of decade inductive voltage dividers. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575000An experiment was designed to study the effects of material type and configuration on Optical Cross Section (OCS) and spectrum. The experiment was conducted at an Air Force Research Laboratory (AFRL) far-field imaging facility, using different diffus ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574446Detection and classification of unexploded ordnance based on electromagnetic induction have made tremendous progress over the last few years, to the point that not only more realistic terrains are being considered but also more realistic questions su ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574102The Supersonics Project of the NASA Fundamental Aeronautics Program organized an internal sonic boom workshop to evaluate near- and mid-field sonic boom prediction capability at the Fundamental Aeronautics Annual Meeting in Atlanta, Georgia on Octobe ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003234A technique for predicting supersonic pitch damping of blunt axisymmetric bodies from static CFD data is presented. The contributions to static pitching moment due to forebody and aftbody pressure distributions are broken out and considered separatel ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003227A validation study of Computational Fluid Dynamics (CFD) for Supersonic Retropropulsion (SRP) was conducted using three Navier-Stokes flow solvers (DPLR, FUN3D, and OVERFLOW). The study compared results from the CFD codes to each other and also to wi ...http://www.ntis.gov/search/product.aspx?ABBR=N20130003306The long-term research interests of this work focus on behaviors of electron transfer through metal-metal bonds which can be extended with more metal atoms or with axially coordinated functionality and thus evolves into a unique category of functiona ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573807Programmable motion and patterning of molecules on solid surfaces. Adsorbed on a solid surface, a molecule can migrate and carry an electric dipole moment. A nonuniform electric field can direct the motion of the molecule. A collection of the same mo ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131076878A comprehensive theory of the modulation response of quantum dot (QD) lasers is developed. The factors limiting the modulation bandwidth are identified and the highest possible bandwidth is calculated. The highest bandwidth increases directly with ov ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574106In 1984, DOE awarded Harvard University a new Grant DE-FG02-84ER40158 to continue their support of Tai Tsun Wu as Principal Investigator of research on the theory of high energy collision processes. This Grant was renewed and remained active continuo ...http://www.ntis.gov/search/product.aspx?ABBR=DE20131024485Athermal lasers dispose of their waste heat in the form of spontaneous fluorescence (i.e., by laser cooling) to avoid warming the medium. The thermodynamics of this process is discussed both qualitatively and quantitatively from the point of view of ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574903The topic is the diffuse cosmic ultraviolet background radiation, which is one among a number of diffuse celestial backgrounds that occur at various frequencies. For an excellent earlier review, see Paresce & Jakobsen (89). Figure 1 provides a key fo ...http://www.ntis.gov/search/product.aspx?ABBR=ADA575055The long term goals of this effort are (i) the development of a unified parameterization for the marine boundary layer; (ii) the implementation of this new parameterization in the US Navy NOGAPS model; and (iii) the transition of this new version of ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574017The broad long-term goal of this research is to extend understanding of wave and current processes over a very rough boundary, specifically that presented by a coral reef. From this understanding we aim to develop models that account for the effects ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574388Waveform design and waveform scheduling are addressed in the context of space time adaptive processing (STAP) for radar. An air-borne radar with an array of sensors is assumed, which interrogates ground based targets. The designed waveform is assumed ...http://www.ntis.gov/search/product.aspx?ABBR=ADA574870The first W-Band antimonide based compound semiconductor low-noise amplifier has been demonstrated. The compact 1.4-mm2 three-stage co-planar waveguide amplifier with 0.1- micrometer InAs/AlSb high electron mobility transistor devices is fabricated o ...http://www.ntis.gov/search/product.aspx?ABBR=ADA573976