Molecular characterization of microbial communities in soils with RDX degradation, determination of RDX metabolites and metabolic pathways, determine the diversity of xplA in the environment and possible evolutionary origin, determine the mechanism of horizontal gene transfer of xplA, investigate the regulation and transcription of xplA/B, and discover new bacteria capable of degrading RDX and determine the enzymes involved.
Topics: DTIC Archive, Strand,Stewart E, University of Washington Seattle United States, pseudomonas...
Since 2000, regulators and the regulated community have become increasingly concerned about the potential for exposure to volatile organic compounds (VOCs) through vapor intrusion to indoor air at sites with contaminated soil or groundwater. Detailed investigations at a limited number of corrective action sites have documented elevated levels of chlorinated VOCs in houses located above contaminated groundwater (DiGiulio et al., 2006; Tillman and Weaver, 2005). In response, the U.S....
Topics: DTIC Archive, McHugh, Thomas, GSI ENVIRONMENTAL INC HOUSTON TX, *VAPORS, *SAMPLING, *ORGANIC...
Raytheon Systems Company is currently designing the algorithms of the FAA's Wide Area Augmentation System (WAAS). This paper will briefly overview the WAAS network time (WNT) algorithms and their integration into the overall system. The WAAS system is required to provide users with orbit, clock, and ionosphere corrections for single-frequency measurements of the GPS signal. The clock corrections will be made in the WAAS network time (WNT) reference scale. This reference scale is required to...
Topics: DTIC Archive, Griffith, Cheryl, RAYTHEON CO WALTHAM MA, *ALGORITHMS, *GLOBAL POSITIONING SYSTEM,...
We report here the angular and polarization dependent transmission characteristics of surface-normal optical filters based on Fano resonances on patterned single crystalline silicon nanomembranes (SiNM), which were fabricated and transferred onto transparent PET plastic substrates using a disruptive SiNM wet transfer process. The measured surface-normal and angle-dependent filter transmission results agree well with the design and simulation based on 3D finite-difference time-domain technique.
Topics: DTIC Archive, Qiang, Zexuan, TEXAS UNIV AT ARLINGTON NANOFAB CENTER, *OPTICAL FILTERS, FABRICATION,...
This appendix contains all the plots and tables for the simulations involving 1-DOF prescribed pitch motion of Model 5613 scaled to the length 154 m. Each of Figures E-1 through E-300 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are insufficient for a single period, there is no curve for that code. The lack of data in any figure has been noted...
Topics: DTIC Archive, NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD, *TABLES(DATA), *SHIP MOTION,...
In this report, we investigate the current rectification property of chemical vapor deposited (CVD), as-grown single-walled carbon nanotubes (SWNTs). We use the long strands of SWNT bundles to fabricate multiple arrays of switching devices with channel lengths of 3, 5, 7, and 10 micrometer on a 15 x 15 mm2 silicon dioxide (SiO2) on silicon (Si) substrate. A majority of the fabricated devices, regardless of channel length, showed current rectification characteristics with high throughput of...
Topics: DTIC Archive, Mallick, Govind, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS...
In the beginning of 2008, American International Group (AIG) was one of the world's largest insurers, generally considered to be financially sound with an AA credit rating. By the end of the year, it had undergone a near bankruptcy and had been forced to seek up to $173.4 billion in financial assistance from the U.S. government. The CEO had been replaced at the government?s behest, executive compensation was under limits, and shareholders in AIG had been nearly wiped out as their equity was...
Topics: DTIC Archive, Webel, Baird, LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE,...
From 2005 to 2008, the National Academies conducted an external review of National Institute for Occupational Safety and Health (NIOSH) research programs. The National Academies' review assessed the programs' impact on and relevance to preventing work-related injuries, illnesses, and fatalities. This book describes the methodology that RAND researchers developed to help NIOSH research programs demonstrate and communicate the impact of their activities. The methodology is based on the use of...
Topics: DTIC Archive, Williams, Valerie, RAND CORP SANTA MONICA CA INST FOR CIVIL JUSTICE, *RESEARCH...
A multiple time source comparison system (MTCS) has been implemented that is enhancing the reliability of the time source of our time disseminative service, including the Network Time Protocol (NTP) server, Taiwan's Computer Time Service (TCTS), and the Speaking Clocks Service. The time sources of MTCS are two HP407ZA cesium-beam clocks with a micro-phase-stepper and an IRIG-B time-code generator in two shielded rooms; the other source is GPS. We designed an algorithm to make sure that at least...
Topics: DTIC Archive, NATIONAL STANDARD TIME AND FREQUENCY LAB TAOYUAN (TAIWAN), *COMPARISON, *TIME,...
Our world is changing every day. As a result of this change, State Defense Forces are experiencing a period of dynamic change. As of this writing, (October 2006) several national events with significant impact are occurring. The war on terrorism is in full swing, pandemic flu is an emerging threat, wild fires are burning in many locations in the western United States, and the Gulf States are still trying to recover from the effects of hurricanes Katrina and Rita before the next hurricane season...
Topics: DTIC Archive, WASHINGTON STATE GUARD CAMP MURRAY, *COURSES(EDUCATION), *CRISIS MANAGEMENT,...
We use Ion Beam Proximity Lithography (IBPL) to produce 4mm x 4mm arrays of 220 nm dots in perpendicularly-oriented Co/Pd multilayered media. IBPL is used to reduce the size distribution sigmaD of the arrays, and subsequently He+ ion irradiation is used to reduce their anisotropy. The Switching Field Distribution sigma(Hcr)/H(Cr) is measured for each sample before and after irradiation, and a linear relationship is experimentally found between sigma(Hcr)/H(Cr) and sigmaD. We argue that the...
Topics: DTIC Archive, Smith, Darren, HOUSTON UNIV TX CENTER FOR NANOMAGNETIC SYSTEMS, *NANOSTRUCTURES,...
This paper describes the on-orbit operational performance of the frequency standards on the GPS 1-10 Navstar satellites . The history of Rb frequency standards showing the improvements incorporated at various stages the program and the corresponding results are presented. Also presented is the operational history of the Navstar Cesium Frequency Standards. The frequency standards configuration data presented will cover the chronology of events from the concept validations satellites , Navstars...
Topics: DTIC Archive, ROCKWELL INTERNATIONAL SEAL BEACH CA SATELLITE SYSTEMS DIV, *RUBIDIUM, *CESIUM,...
When new or modified explosives or explosive ordnance are being procured, the Australian Ordnance Council provides advice on their safety and suitability for service (S3). This information is provided from the analysis of results from a program of tests designed to replicate the manufacture-to-target sequence of the explosive ordnance being procured. The manufacture-to-target sequence identifies the various environments the ammunition will experience from the time it is delivered from the...
Topics: DTIC Archive, AUSTRALIAN ORDNANCE COUNCIL CANBERRA, *SEQUENCES, *ORDNANCE, *SAFETY, *TARGETS,...
The aim of the Project is to study experimentally and theoretically the possibility of working pressure increase and increase of singlet delta oxygen (SDO) yield in conditions of gas flow through the discharge region. Also, the properties of SDO and iodine containing gas mixture will be studied during the Project. In this connection, creation of experimental discharge facilities with gas flow is needed for efficient SDO production. During the work on the Project, active gas mixture will be...
Topics: DTIC Archive, RUSSIAN ACADEMY OF SCIENCES MOSCOW LEBEDEV INST, *MAGNETOHYDRODYNAMICS,...
Risk tolerance metrics are consistently used in economics experiments as a means to inform researchers how the aggregation of individual choices affects market, organizational, or financial outcomes. Economic theory, however, is silent on their use as a predictive metric for ascertaining why individuals exhibit a particular risk preference. Insight as to the possible drivers of why individuals exhibit a given risk preference may lie in the cognitive and noncognitive characteristics embodied in...
Topics: DTIC Archive, UNIVERSITY OF NORTH ALABAMA FLORENCE, *INTELLIGENCE(HUMANS), *SEX, *PERSONALITY,...
The Army Research Laboratory, Battlefield Environment Division has been developing an Aviation Weather Routing Tool (AWRT) to address the issue of weather impacts upon various Unmanned Aircraft System (UAS) missions. The AWRT depicts regions of adverse weather impacts and then searches for alternate routes that minimize those impacts. A related factor that has yet to be included in AWRT involves UAS fuel consumption. Fuel consumption rates, remaining fuel quantity, and therefore allowable...
Topics: DTIC Archive, ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM COMPUTATIONAL AND INFORMATION SCIENCE...
The objectives of this briefing are: *Describe common training-related musculoskeletal injuries. *Identify musculoskeletal injury prevention strategies. *Discuss strategies for optimizing musculoskeletal health.
Topics: DTIC Archive, UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD DEPT OF MILITARY AND...
This study evaluated the dose-response effects of subacute exposure to sublethal doses of VX on acoustic startle response (ASR) and operant behavior of rats. ASR baseline was established and rats were exposed to 2 consecutive daily doses of fractions (0.2, 0.4, and 0.6) of the established LD50 of VX (16 micrograms/kg). ASR testing continued for 4 days post-exposure. Subsequently animals were dietary restricted and trained to lever press for food under an autoshaping procedure; then a series of...
Topics: DTIC Archive, ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD, *BEHAVIOR,...
A study of the historical and planned level of Department of Defense (DoD) funding in computer science (CS) research from the 2001-2011 DoD records has provided a top-level view of the current status of investment in this foundational technology. This study was triggered by university and Congressional concern that DoD has been reducing its investment in CS research. The study focused on two issues. First, has DoD CS funding to universities changed substantially year-to-year? Second, what was...
Topics: DTIC Archive, NATIONAL DEFENSE UNIV WASHINGTON DC CENTER FOR TECHNOLOGY AND NATIONAL SECURITY...
There is strong evidence that inflammation and interactions with the surrounding stromal microenvironment are critical for cancer initiation and progression. As a major component of the stroma, fibroblasts are recognized as prominent modifiers of cancer progression. The contribution of carcinoma associated fibroblasts (CAF) to cancer has been approved and become accepted, research has been conducted to understand the mechanisms underlying this stromal-epithelial interaction. In this project we...
Topics: DTIC Archive, VANDERBILT UNIV MEDICAL CENTER NASHVILLE TN, *PROSTATE CANCER, *EPITHELIUM,...
Most deliverables for this project period were met: *PACS equipment became fully operational at 13 primary care clinics in rural Mississippi (2 clinics are scheduled to be installed and operational in June 2007) and radiology staff at all 13 sites were thoroughly trained: (1) Measurement of efficiency of radiologists and primary care providers (PCPs) compared to baseline; (2) Measurement of satisfaction of PCPs compared to baseline; (3) Measurement of efficacy of PCPs providing the initial...
Topics: DTIC Archive, NORTH MISSISSIPPI MEDICAL CENTER TUPELO MS, *PATIENTS, *RADIOLOGY, EFFICIENCY, BASE...
Trust research assumes organizational managers ought to establish high levels of trust. Research also suggests trust is decreasing and therefore raises an important managerial dilemma. We study trust from a contingency theory framework and hypothesize that trust levels may vary depending on different organizational designs. Using the ELICIT multiplayer intelligence game we conduct laboratory experiments to examine the effect of trust levels and organizational design on performance. Results are...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY,...
The National Institute of Standards and Technology (NIST) maintains one of the world's most accurate and stable time scales, and also developed and maintains the primary frequency standard for the United States. Various techniques are used to compare the NIST time scale, UTC (NIST), and the NIST primary frequency standard to other standards located around the world. These techniques include two-way satellite time and frequency transfer (TWSTFT), code-based GPS common-view, and GPS carrier-phase...
Topics: DTIC Archive, NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO TIME AND FREQUENCY DIV,...
Use heterocyclic multidentate monomers specifically designed for this purpose by Density Functional Theory calculations. The main challenge in this design is the geometry of the monomer and the resulting oligomer (i.e., the most favorable all-trans geometry of a polythiophene chain on the Scheme should necessarily result in a continuous brick wall 2D structure). Furthermore, the design should eliminate any steric hindrances in the oligomers which would result in non-planar conformations.
Topics: DTIC Archive, INRS ENERGIE MATERIAUX TELECOMMUNICATIONS VARENNES (CANADA), *POLYMERS,...
The United States has historically capitalized on material and process advances to develop improved ballistic head protection for the warfighter. This also includes innovations in the design of various helmet elements based on careful consideration of the environment, patterns of use, interfacing with other equipment (e.g., weapons, body armor), and possible threat scenarios. As such the U.S. helmet bas evolved in both shape, composition, and manufacture, and this same trend driven largely by...
Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD, *HELMETS, *PROTECTIVE EQUIPMENT,...
These briefing charts showing TARDEC's technology integration program include: ground vehicle power and mobility, ground vehicle survivability, intelligent ground systems, conditioned based maintenance, force projection technology.
Topics: DTIC Archive, TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI, *TECHNOLOGY ASSESSMENT,...
The current use of primarily light forces in Iraq and Afghanistan and the increased emphasis on expeditionary operations within the Marine Corps has inclined some to say that the tank's days as part of the Marine air-ground task force (MAGTF) are numbered. The belief that light armor such as the amphibious assault vehicle (AAV), light armored vehicle (LAV), or a vehicle such as the U.S. Army's Stryker offers a similar capability to heavy armor is untrue. Although light armor is an indispensable...
Topics: DTIC Archive, MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA, *MOBILITY, *MILITARY CAPABILITIES,...
This study involves the technical development and clinical testing of a novel technique for magnetic resonance imaging (MRI) guided prostate biopsy in a 1.5T horizontal bore scanner using a dedicated interventional table. We primarily hypothesize that the integration of diagnostic and interventional MRI enables needle biopsy targeting to foci of tumor recurrence after radiotherapy, and will enable a determination of the diagnostic accuracy of MRI in mapping sub-sites of tumor recurrence after...
Topics: DTIC Archive, UNIVERSITY HEALTH NETWORK TORONTO (ONTARIO), *MAGNETIC RESONANCE IMAGING, *PROSTATE...
The accuracy of wind speed at 10 m above the sea surface from two satellite and three numerical weather prediction (NWP) products is investigated over the global ocean. Rain-free equivalent neutral winds from the Quick Scatterometer (QuikSCAT) are converted to stability-dependent winds to be consistent with those from NWP products and are taken as truth in comparisons to winds from other products. Quantitative statistical analyses presented at each grid point over the global ocean reveal that...
Topics: DTIC Archive, NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV, *WIND VELOCITY,...
This paper summarizes a new methodology to design sequential non-diagonal QFT controllers for multi-input multi-output MIMO systems with uncertainty, which is a central issue in UAV control systems. It also demonstrates the feasibility of that methodology to control the position and attitude of a 6x6 MIMO spacecraft with large flexible appendages. The last part of the paper introduces a new practical methodology to design robust controllers that work under a switching mechanism, going beyond...
Topics: DTIC Archive, UNIVERSIDAD PUBLICA DE NAVARRA PAMPLONA (SPAIN) DEPT DE AUTOMATICA Y COMPUTACION,...
In 2004 and 2005 several large hurricanes (category 3 or greater) made landfall along Florida's barrier island shorelines. Where shorelines were developed, storms did millions of dollars in structural damage. Where previous shoreline protection had occurred in the form of beach nourishment or dune restoration, much of this sand was removed. On public lands, overwash from storms removed beach and dune vegetation, redistributed sand, created new inlets, and in some cases, caused damage to park...
Topics: DTIC Archive, AMERICAN BIRD CONSERVANCY, *COASTAL ENGINEERING, *SHOREBIRDS, *ENVIRONMENTAL IMPACT,...
A large-amplitude mountain wave generated by strong southwesterly flow over southern Greenland was observed during the Fronts and Atlantic Storm-Track Experiment (FASTEX) on 29 January 1997 by the NOAA G-IV research aircraft. Dropwindsondes deployed every 50 km and flight level data depict a vertically propagating large-amplitude wave with deep convectively unstable layers, potential temperature perturbations of 25 K that deformed the tropopause and lower stratosphere, and a vertical velocity...
Topics: DTIC Archive, NAVAL RESEARCH LAB MONTEREY CA, *WAVE PROPAGATION, *GREENLAND, *AMPLITUDE,...
If today's warfighters truly adopt the mantra All soldiers and Marines are intelligence collectors, the reporting and dissemination of tactical information must improve. Unfortunately, potentially valuable information is hemorrhaging in the gap between collector and formal reporting. To compound this problem, much of the information that is documented becomes stovepiped within internal unit channels and is never posted to national intelligence databases accessible to tactical units and the rest...
Topics: DTIC Archive, MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA, *TACTICAL INTELLIGENCE, *REPORTS,...
The current mindset of the Army is that it must be able to win our Nation's wars while at the same time ready to assist in stability operations (U.S. Department of the Army, 2008). A challenge is that Soldiers often have to bridge large cultural gaps and may lack the language skills to effectively engage with the host of individuals now present in these operations including the local populace, host nation security forces, coalition partners and other foreign governmental and nongovernmental...
Topics: DTIC Archive, ECROSSCULTURE CORP BOULDER CO, *SOCIAL PSYCHOLOGY, *INTERPERSONAL RELATIONS, *CROSS...
We report the influence of composition and very high transverse field annealing on the magnetic properties and structure of four FeCo-based amorphous and nanocrystalline alloys. The compositions (Fe50Co50)89Zr7B4 and (Fe65Co35)89Zr7B4 were investigated changing the Fe:Co ratio from 50:50 to 65:35. (Fe50Co50)85Zr2Nb4B8.5 was chosen to investigate Nb substitution for Zr in an FeCo-based alloy. This substitution is shown to increase the magnetostrictive constant, lambdaS, of the nanocrystalline...
Topics: DTIC Archive, CARNEGIE-MELLON UNIV PITTSBURGH PA, *AMORPHOUS MATERIALS, *COBALT ALLOYS, *ANNEALING,...
The military strategy of the North Atlantic Treaty Organization is two-pronged, consisting of the principles known as flexible response and forward defense. While the flexible response doctrine has been subjected to intense scrutiny since its promulgation in 1967, the forward defense strategy more often has been neglected by analysts. This article addresses this less thoroughly examined side of NATO strategy, exploring the operational origins, rather than the strategic or political origins, of...
Topics: DTIC Archive, ARMY WAR COLL CARLISLE BARRACKS PA, *POSTWAR, *NATO, *MILITARY STRATEGY, WESTERN...
This technical report is part of the research efforts to improve human systems integration (HSI) in the systems engineering (SE) technical processes. It documents the mapping of human error codes used in accident investigations with the established domains of HSI. This will enable the application of legacy mishap data to new system design.
Topics: DTIC Archive, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT,...
The U.S. Department of Defense and Navy are placing a greater emphasis in energy efficiency. Though the surface fleet comprises only a small percentage of petroleum usage, seemingly small efficiencies gained could yield substantial fuel savings. This thesis follows a process of researching and collecting fuel-saving ideas, developing a method to estimate savings, subjecting calculations to sensitivity analyses by discount factor and cost of fuel, and creating prioritization listings of ideas...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH, *TECHNOLOGY...
The governing mechanisms of fatigue spall propagation in ball bearing inner raceways are investigated through the use of elastic-plastic finite element modeling, X-Ray Diffraction, and the visual inspection of fatigue spall cracks. The model simulates multiple ball impacts with a fatigue spall's edge in a 208 size ball bearing operating at 10,000 rpm. Ball impacts are shown to cause severe plastic deformation within the spall edge and induce tensile residual stresses. The finite element results...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE, *BEARING...
Weapons can kill people -- fatwas can kill the ideology that motivates people. The current struggle between the world and Muslim extremists consists of two battlefields: the physical and the ideological. While kinetic actions on the physical battlefield remain relevant, only through ideological warfare will the decisive battle be won. The cornerstone to waging ideological warfare is Information Operations (IO). However, current IO efforts are not aligned to properly exploit the current...
Topics: DTIC Archive, MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA, *INFORMATION WARFARE, *PUBLIC...
Previously, a novel formulation for the generation of three-dimensional (3D) inverse synthetic aperture radar (ISAR) images based on recent developments in high resolution spectral estimation theory was presented. Because this technique requires only snapshots of data, where a snapshot is defined as a block of Nyquist sampled frequency-time pulses of data, we refer to it as 3D snapshot imaging. Concomitant with these results, recent advances in interferometric SAR imaging have demonstrated the...
Topics: DTIC Archive, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *RADAR IMAGES, *SYNTHETIC APERTURE...
First, we outline a general model of how DoD acquisition skills and organization integration capabilities affect the contribution of PMFs to mission performance. Second, we address risk management in PMF contracting by outlining a spectrum of control mechanisms. As PMF management is clearly not the sole job of the acquisition community, we argue that DoD policy-makers should rethink how the department might change itself in order to integrate PMF services more effectively and efficiently.
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY,...
Topics: DTIC Archive, ARMY COMBINED ARMS CENTER FORT LEAVENWORTH KS, *ARMY PERSONNEL, *PERSONNEL...
The subgenera Indusius Edwards and Edwardsaedes Belkin are redescribed and compared to other subgenera of the genus Aedes Meigen. Species assigned to the subgenera are fully illustrated and described, An analysis of the variation in setal branching in larvae and pupae of imprimens (Walker) is presented. Aedes suknaensis (Theobald) is returned to synonymy with imprimens.
Topics: DTIC Archive, WALTER REED ARMY INST OF RESEARCH WASHINGTON DC DEPARTMENT OF ENTOMOLOGY, *SOUTH...
The specific technical objectives are to 1) develop a method to extract rainfall data from the tactical scans of the SPS-48 radar and provide the rain data in a form suitable for propagation models such as the Earth-to-Satellite Propagation Model with METOC (ESPM2) and the Advanced Propagation Model (APM); and 2) modify the current statistics-based rain attenuation model within the ESPM2 and the APM to ingest real time rainfall rate data obtained from shipboard radar (SPS-48 initially).
Topics: DTIC Archive, SPACE AND NAVAL WARFARE SYSTEMS CENTER PACIFIC SAN DIEGO CA ATMOSPHERIC PROPAGATION...
One of the primary objectives of this project is to establish a more comprehensive technical support capability for the COAMPS users, particularly those who have projects supported by ONR. Other functions in the support structure include, but are not limited to: making incremental improvements to the web site, updating versions of the code as necessary, updating the COAMPS documentation, providing user feedback to COAMPS developers, providing NOGAPS data for COAMPS IC and BC for historical...
Topics: DTIC Archive, NAVAL RESEARCH LAB MONTEREY CA, *WEATHER FORECASTING, *METEOROLOGICAL DATA,...
The long term goals are 1) to determine when methods can be used to reliably and accurately predict the temporal and spatial coherence of sound at low frequencies in the sea, 2) to develop reliable and accurate methods to make such predictions and, 3) to determine the physical mechanisms affecting coherence. The first two goals are to be achieved without tuning with data in any way whatsoever. The primary objective is to determine when the temporal and spatial scales of temporal and spatial...
Topics: DTIC Archive, SCIENTIFIC INNOVATIONS INC RADNOR PA, *UNDERWATER SOUND, *COHERENCE, DEEP OCEANS, LOW...
The long term goal of our shallow water acoustics work is to understand the nature of low frequency (10-1500 Hz) acoustic propagation and scattering in shallow water when strong oceanic variability in the form of fronts, eddies, boundary layers, and internal waves is present.
Topics: DTIC Archive, WOODS HOLE OCEANOGRAPHIC INSTITUTION MA, *SHALLOW WATER, SCATTERING, BOUNDARY LAYER,...
Sleep disruptions are a common clinical feature observed in children with autism spectrum disorders (ASD). These include irregular sleep-wake patterns, delayed sleep latencies, and problems with sleep maintenance. The etiology of these sleep disturbances is unknown and remains relatively unexplored in any animal model of ASD. Prenatal valproic acid (VPA) exposure is a proposed model of ASD. Pups exposed to VPA in utero show similar characteristics to children with ASD, including abnormalities...
Topics: DTIC Archive, MARYLAND UNIV BALTIMORE, *ETIOLOGY, *CYTOKINES, *STRESS(PSYCHOLOGY), *SLEEP,...
Cross body thrusters permit a body of revolution Autonomous Underwater Vehicle to retain the energy efficiency of forward travel while increasing the ability to maneuver in confined areas such as harbors and piers. This maneuverability also permits more deliberate underwater surveys using a fixed, mounted forward and downward looking sonar. This work develops the necessary hydrodynamic coefficients, using methods applied to earlier vehicles, to develop a valid computer simulation model....
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *AUTONOMOUS NAVIGATION, *UNDERWATER VEHICLES,...
