| Analysis of Deep Seafloor Arrivals Observed on NPAL04 |
03 Dec 2012 |
94 pages |
| Authors:
Ralph A Stephen; S T Bolmer; Ilya A Udovydchenkov; Matthew A Dzieciuch; Peter F Worcester; Rex K Andrew; James A Mercer; John A Colosi; Bruce M Howe; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF GEOLOGY AND GEOPHYSICS
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 | This report gives an overview of the analysis that was done on Deep Seafloor Arrivals since they were initially presented in Stephen et al (2009). All of the NPAL04/LOAPEX (North Pacific Acoustic Laboratory, 2004/ Long Range Ocean Acoustic Propagation Experiment) data on three ocean bottom seismometers (OBSs) at 5,000m depth and the deepest element of the deep vertical line array (DVLA) at 4250m depth has been analyzed. A distinctive pattern ... |
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| Imaging Disk Distortion of Be Binary System Delta Scorpii Near Periastron |
20 Sep 2012 |
19 pages |
| Authors:
X Che; J D Monnier; C Tycner; S Kraus; R T Zavala; F Baron; E Pedretti; T ten Brummelaar; H McAlister; S T Ridgway; NAVAL OBSERVATORY FLAGSTAFF AZ
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| The highly eccentric Be binary system δ Sco reached periastron during early 2011 July, when the distance between the primary and secondary was a few times the size of the primary disk in the H band. This opened a window of opportunity to study how the gaseous disks around Be stars respond to gravitational disturbance. We first refine the binary parameters with the best orbital phase coverage data from the ... |
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| Optimal Use of TDOA Geo-Location Techniques Within the Mountainous Terrain of Turkey |
Sep 2012 |
170 pages |
| Authors:
Volkan Tas; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Emitter location finding enables important functionality for both military and civilian applications. GPS is the most recognized and widely used positioning system, but it is a receiver location system that functions in a markedly different manner from emitter location. Many geo-location techniques predate and have been proposed as an alternative to GPS. Some of the more commonly used and exploited of these techniques are angle of arrival, time of arrival, ... |
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| Connecting Land-Based Networks to Ships |
Sep 2012 |
107 pages |
| Authors:
Panagiotis Chatzigiannis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE
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| Today it's important for ships at sea to be able to communicate and exchange information with a shore network, like file transferring, database access, e-mail, web/intranet browsing, or video conferencing. Navy ships might even want to send a live video feed from the field. To accomplish this, most ships use satellite communications, an expensive and slow method. When a ship is near shore, it can use alternative methods of communicating ... |
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| Effect of Intraperitoneal Radiotelemetry Instrumentation on Voluntary Wheel Running and Surgical Recovery in Mice |
Sep 2012 |
10 pages |
| Authors:
Bryan G Helwig; Jermaine A Ward; Michael D Blaha; Lisa R Leon; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
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| Radiotelemetry transmitters support tracking of physiologic variables in conscious animals, but the size of the transmitter may alter animal health and behavior. We hypothesized that the size of the device adversely affects body weight, food intake, water intake, circadian core temperature, activity, voluntary running patterns, and the health of internal organs and that these negative effects can be minimized with smaller transmitter devices. Male C57BL/6J mice (weight, 20 to 24 ... |
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| Vessel Noise Affects Beaked Whale Behavior: Results of a Dedicated Acoustic Response Study |
Aug 2012 |
10 pages |
| Authors:
Enrico Pirotta; Rachael Milor; Nicola Quick; David Moretti; Nancy Di Marzio; Peter Tyack; Ian Boyd; Gordon Hastie; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
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| Some beaked whale species are susceptible to the detrimental effects of anthropogenic noise. Most studies have concentrated on the effects of military sonar, but other forms of acoustic disturbance (e.g. shipping noise) may disrupt behavior. An experiment involving the exposure of target whale groups to intense vessel-generated noise tested how these exposures influenced the foraging behavior of Blainville's beaked whales (Mesoplodon densirostris) in the Tongue of the Ocean (Bahamas). A ... |
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| Movements and Spatial Use of Odontocetes in the Western Main Hawaiian Islands: Results from Satellite-Tagging and Photo-Identification off Kaua'i and Ni'ihau in July/August 2011 |
07 Jun 2012 |
22 pages |
| Authors:
Robin W Gaird; Daniel L Webster; Gregory S Schorr; Jessica M Aschettino; Antoinette M Gorgone; Sabre D Mahaffy; CASCADIA RESEARCH COLLECTIVE OLYMPIA WA
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| Although considerable information is available on residency patterns and spatial use of odontocetes in the eastern half of the Hawai i Range Complex (HRC), much less is known about odontocetes in the western half of the HRC. In the second year of a three-year effort in the western main Hawaiian Islands we undertook surveys off Kaua i and Ni ihau in July/August 2011, to examine spatial use and residency patterns ... |
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| Investigation of an Unusually Shallow Earthquake Sequence in Mogul, NV from a Discrimination Perspective (Postprint): Annual Report 1 |
09 May 2012 |
12 pages |
| Authors:
Ileana M Tibuleac; Glenn Biasi; David von Seggern; John G Anderson; Danielle Molisee; NEVADA UNIV RENO NV
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| Distinction between very shallow (1-4 km deep) earthquakes and underground nuclear explosions remains an important issue in discrimination research. This is because very shallow earthquakes are seldom well-recorded and documented. As a consequence, their source parameters, scaling and their local and regional propagation characteristics are not well understood. Thus, unlike for deeper events, the effectiveness of the discrimination algorithms when applied to unusually shallow earthquakes has been only rarely determined. ... |
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| ROBODEXS; Multi-robot Deployment & Extraction System |
03 Apr 2012 |
13 pages |
| Authors:
Jeremy P Gray; James R Mason; Michael S Patterson; Matthew W Skalny; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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| The importance of Unmanned Ground Vehicles (UGV's) in the Military's operations is continually increasing. All Military branches now rely on advanced robotic technologies to aid in their missions' operations. The integration of these technologies has not only enhanced capabilities, but has increased personnel safety by generating larger standoff distances. Currently most UGV's are deployed by an exposed dismounted Warfighter because the Military possess a limited capability to do so remotely ... |
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| Solar Energetic Electron Probes of Magnetic Cloud Field Line Lengths (Postprint) |
02 Mar 2012 |
16 pages |
| Authors:
S W Kahler; S Krucker; A Szabo; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
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| Magnetic clouds (MCs) are large interplanetary coronal mass ejections of enhanced and low variance fields with rotations indicative of magnetic flux ropes originally connected to the Sun. The MC flux rope models require field lines with larger pitch angles and longer lengths with increasing distance from the MCaxis. While the models can provide good fits to the in situ solar wind observations, there have not been definitive observational tests of ... |
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| Spatial Identification of Passive Radio Frequency Identification Tags Using Software Defined Radios |
Mar 2012 |
136 pages |
| Authors:
Paul A Cornn; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| This research seeks to utilize a software defined radio for the detection and spatial identification of radio frequency identification tags. A software defined radio (SDR) is a hardware platform that provides the ability to broadcast and receive across multiple bands of the radio frequency (RF) spectrum, depending on the RF front end and software profile loaded on it. The focus of the research will be on the spatial identification (SID) ... |
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| UCAC3 Proper Motion Survey. 2. Discovery of New Proper Motion Stars in UCAC3 with 0.40 yr-1 micro or = 0.18 yr-1 between Declinations -47 deg and 00 deg |
01 Feb 2012 |
12 pages |
| Authors:
Charlie T Finch; Norbert Zacharias; Mark R Boyd; Todd J Henry; Nigel C Hambly; NAVAL OBSERVATORY WASHINGTON DC
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| The third U.S. Naval Observatory (USNO) CCD Astrograph Catalog (UCAC3) (Zacharias et al. 2010) proper motion survey addresses the possibility that proper motion surveys using digitized scans of photographic plates might overlook some proper motion systems. The UCAC3 obtained accurate proper motions by combining CCD observations with early epoch photographic data. This survey utilizes the UCAC3 proper motions to discover new systems that have been missed in previous efforts. |
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| Coherent Distributed Radar for High-Resolution Through-Wall Imaging |
Feb 2012 |
3 pages |
| Authors:
Eric van Doorn; Satya Ponnaluri; INTELLIGENT AUTOMATION INC ROCKVILLE MD
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| In this reporting period, we are continuing to collect indoor data and processing the scans for improving the indoor range accuracy. Since the transceivers are very tightly synchronized, the transmission phase and time and the phase use for down conversion are well-controlled and repeatable as we perform the experiments. As a result, we observe a clear correlation between the range error and the correlation amplitude. In Figure 1, we show ... |
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| Coherent Distributed Radar for High-Resolution Through-Wall Imaging |
Feb 2012 |
5 pages |
| Authors:
Eric van Doorn; Satya Ponnaluri; INTELLIGENT AUTOMATION INC ROCKVILLE MD
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| During this period of performance, we processed data collected in different node location configurations for accuracy of the currently implemented algorithm, which is an edge detection algorithm. It sets the base line performance of the current ranging system. In the next reporting periods, we will reprocess this data to show the improvement achievable by digital beam forming. Figure 1 shows the correlation between the actual measured range between the master ... |
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| Coherent Distributed Radar for High-Resolution Through-Wall Imaging |
Feb 2012 |
4 pages |
| Authors:
Eric van Doorn; Satya Ponnaluri; INTELLIGENT AUTOMATION INC ROCKVILLE MD
|
| In this reporting period, we continued collecting indoor data and processing the scans for improving the indoor range accuracy. Since the transceivers are very tightly synchronized, the transmission phase and time and the phase use for down conversion are well-controlled and repeatable as we perform the experiments. We are continuing to take more data and develop algorithms for improved range accuracy based on both channel estimation and digital beam forming. ... |
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| Arctic Ship Design Impacts: Green Arctic Patrol Vessel (GAPV) Project |
Feb 2012 |
13 pages |
| Authors:
W S Weidle; Parker Field; Nicholas Buckley; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
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| Arctic warming and the resulting polar ice break up is expected to increase traffic through the Arctic region for tourism, research, resource extraction, and transportation purposes. Understanding that the United States will have a strategic objective in the region in the coming decades, the current U.S. Navy (USN) fleet is not designed to meet the challenges of operating in an Arctic environment. Anticipating that need, the Green Arctic Patrol Vessel ... |
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| Suitability of Potential Alternatives to Pyrotechnic Distress Signals |
Feb 2012 |
88 pages |
| Authors:
Robert Young; David Dye; Carissa Brunsman-Johnson; Christopher Locklear; Thomas Anderson; Marion Lewandowski; Vincent Reubelt; Anita Rothblum; Brian Strattard; COAST GUARD NEW LONDON CT RESEARCH AND DEVELOPMENT CENTER
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| Purpose: To determine the potential suitability of electronic alternatives to pyrotechnic visual distress signals through the evaluation of the effectiveness of presently-available LED (and other) devices as visual distress signal devices (VDSDs). Methods: Requirements workshop, market research, field testing to assess visibility at different ranges, paired comparison testing to assess attention-getting characteristics, and ergonomic testing. Results: Lab test results predicting device visual detection range based on effective intensity compared well ... |
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| Computational and Experimental Analysis of Mach 5 Air Flow over a Cylinder with a Nanosecond Pulse Discharge |
Jan 2012 |
31 pages |
| Authors:
Nicholas J Bisek; Jonathan Poggie; Munetake Nishihara; Igor Adamovich; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| A computational study is performed for Mach 5 air flow over a cylinder with a dielectric barrier discharge actuator set into the cylinder surface. The actuator is pulsed at nanosecond time scales, which rapidly adds energy to the flow, thereby creating a shock wave that travels away from the pulse source. As the shock wave travels upstream, it interacts with the standing bow-shock and momentarily increases the bow-shock standoff distance. ... |
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| Forster Resonance Energy Transfer Between Core/Shell Quantum Dots and Bacteriorhodopsin |
Jan 2012 |
8 pages |
| Authors:
Mark H Griep; Eric M Winder; Donald R Lueking; Gregory A Garrett; Shashi P Karna; Craig R Friedrich; ARMY RESEARCH LAB ADELPHI MD
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| An energy transfer relationship between core-shell CdSe/ZnS quantum dots (QDs) and the optical protein bacteriorhodopsin (bR)is shown, demonstrating a distance-dependent energy transfer with 88.2% and 51.1% of the QD energy being transferred to the bR monomer at separation distances of 3.5 nm and 8.5 nm, respectively. Fluorescence lifetime measurements isolate nonradiative energy transfer, other than optical absorptive mechanisms, with the effective QD excited state lifetime reducing from 18.0 ns to ... |
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| Gap Test Calibrations and Their Scaling |
Jan 2012 |
6 pages |
| Authors:
Harold W Sandusky; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
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| Common tests for measuring the threshold for shock initiation are the NOL large scale gap test (LSGT) with a 50.8-mm diameter donor/gap and the expanded large scale gap test (ELSGT) with a 95.3-mm diameter donor/gap. Despite the same specifications for the explosive donor and polymethyl methacrylate (PMMA) gap in both tests, calibration of shock pressure in the gap versus distance from the donor scales by a factor of 1.75, not ... |
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| Influence of Cultural Cognition, Social Aspect of Culture, and Personality on Trust. Annotation |
13 Dec 2011 |
93 pages |
| Authors:
Mei-Hua Lin; Alvin W Yeo; SUNWAY UNIV SELANGOR (MALAYSIA)
|
| The grantee evaluated the relative strength of Mayer's trustworthiness indicators in both a collectivistic and individualistic culture. The research proposed will examine influences of analytic-holistic thinking and power distance on trust, as characterized by the trustworthiness indicators, and the influence of personality variables on the relationship between cognitive load and trust. |
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| Remote Environmental Monitoring and Diagnostics in the Perishables Supply Chain - Phase 1 |
12 Dec 2011 |
210 pages |
| Authors:
Jeffrey K Brecht; Jean-Pierre Emond; Maria C Nunes; Charles A Sims; Asli Obadasi; Ismail Uysal; FLORIDA UNIV GAINESVILLE
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| This report details the Phase 1 effort conducted by the University of Florida and the University of South Florida Polytechnic as part of a multi-year, multi-phase effort entitled Remote Environmental Monitoring and Diagnostics in the Perishables Supply Chain. This work was conducted during the period October 2008 to December 2010 and involved the investigation and application of various technologies including wireless temperature sensors, remote monitoring using radio frequency identification (RFID), ... |
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| Exploitation of Unintentional Information Leakage from Integrated Circuits |
Dec 2011 |
220 pages |
| Authors:
William E Cobb; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Unintentional electromagnetic emissions are used to recognize or verify the identity of a unique integrated circuit (IC) based on fabrication process-induced variations in a manner analogous to biometric human identification. The effectiveness of the technique is demonstrated through an extensive empirical study, with results presented indicating correct device identification success rates of greater than 99:5%, and average verification equal error rates (EERs) of less than 0:05% for 40 near-identical devices. ... |
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| Modeling of Light Airborne High-frequency (HF) Antennas |
Dec 2011 |
28 pages |
| Authors:
Christopher S Kenyon; ARMY RESEARCH LAB ADELPHI MD
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| Performance of three lightweight, high-frequency (HF), airborne antenna designs are compared using FEKO method-of-moments modeling software. Of interest were the beam patterns near the ground. All three are upside down with -wave counterpoise wires at the top. The antennas are fed between the base and the counterpoises. Two are -wave monopole antennas while a third is a combination of cross-connected half and -wave coaxial lines. Field strengths reaching the ground ... |
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| Flame Structure of Vitiated Fuel-Rich Inverse Diffusion Flames in a Cross-Flow (Postprint) |
Dec 2011 |
12 pages |
| Authors:
David Blunck; Amy Lynch; Joseph Zelina; James R Gord; Stanislav Kostka; Sukesh Roy; Marc Polanka; Scott Stouffer; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
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| Fuel-rich streaks or dissociated combustion products exiting from gas turbine combustors may react with jets of turbine vane cooling air. These fuel-rich vitiated inverse diffusion flames can potentially cause structural failure of turbine vanes due to the excessive heat fluxes. In this study OH planar laser induced fluorescence measurements are conducted in fuel-rich vitiated flows advecting over a flat plate with a row of cooling holes normal to the surface. ... |
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| Stochastic Network Interdiction for Optimizing Defensive Counter Air Operations Planning |
Dec 2011 |
73 pages |
| Authors:
Charalampos I Tsamtsaridis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis describes a stochastic, network interdiction optimization model to guide defensive, counter-air (DCA) operations planning. We model a layered, integrated air-defense system, which consists of fighter and missile engagement zones. We extend an existing two-stage, stochastic, generalized-network interdiction model by Pan, Charlton and Morton, and adapt it to DCA operations planning. The extension allows us to handle multiple-type interdiction assets, and constrain the attacker's flight path by the maximum ... |
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| Project Themis: PIV Measurement of Elbow Flow through a Flow Conditioner |
Dec 2011 |
23 pages |
| Authors:
Benjamin Miller; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIR
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| This presentation provides data for validation of a CFD study done on a VORTAB flow conditioner. Objectives include achievement of a full-developed turbulent velocity profile for pipe flow. Secondary flow will cause a flow meter to register unexpected results. VORTAB reduces straight run distance with a minimal pressure loss and minimal validation of the component. CFD simulations, using LH2, showed that the pipe with a VORTAB generated more vorticity at ... |
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| Ultrashort Laser Pulse Propagation in Water |
30 Sep 2011 |
13 pages |
| Authors:
George W Kattawar; Alexei V Sokolov; TEXAS A AND M UNIV COLLEGE STATION DEPT OF PHYSICS
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| The major objectives of this proposal are twofold. The first objective is to perform both an experimental and theoretical study of the factors affecting the propagation distance behavior of ultrashort (femtosecond) laser pulses in water. This study will be conducted in the so-called linear regime which involves laser intensities that are below the threshold where nonlinear effects set in. A fundamental problem, which will be resolved by this research, is ... |
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| A System and Method for Detection of Noise in Sparse Data Sets with Edge-Corrected Measurements |
30 Sep 2011 |
39 pages |
| Authors:
Jr O'Brien Francis J; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
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| A signal processing system and method includes a transducer for receiving an analog signal having a random component and possibly an information component. The analog signal is converted into a digital signal having sample points. A nearest-neighbor calculation component calculates the expected average nearest neighbor distance between the sample points, the actual average distance and an error value. These values are corrected for edge effects. A first randomness assessment compares ... |
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| A Comparison of Satellite Conjunction Analysis Screening Tools |
Sep 2011 |
11 pages |
| Authors:
Eric R George; Seth Harvey; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
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| Satellite collision avoidance analysis has received increased attention primarily due to the Iridium-COSMOS collision of February 2009, including consideration by the US Air Force of regular all vs all collision avoidance screening of the entire space catalog. Traditionally this type of analysis has been limited by computational resources. This analysis considers the accuracy and completeness of results achieved by six conjunction analysis screening tools in development or use in a ... |
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| Extending the Unambiguous Range of CW Polyphase Radar Systems Using Number Theoretic Transforms |
Sep 2011 |
131 pages |
| Authors:
Nattaphum Paepolshiri; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Polyphase continuous waveform (CW) radar systems often use the popular Frank code and P4 code due to their linear time-frequency characteristics as well as their low periodic ambiguity sidelobes. The phase relationship of the Frank code corresponds to a sawtooth folding waveform. The phase relationship of the P4 code is symmetrical with a parabolic distribution. The radar system s unambiguous target detection range is limited by the number of subcodes ... |
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| Extending The Umambiguous Range Of CW Polyphase Radar Systems Using Number Theoretic Transforms |
Sep 2011 |
131 pages |
| Authors:
Nattaphum Paepolshiri; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Polyphase continuous waveform (CW) radar systems often use the popular Frank code and P4 code due to their linear time-frequency characteristics as well as their low periodic ambiguity sidelobes. The phase relationship of the Frank code corresponds to a sawtooth folding waveform. The phase relationship of the P4 code is symmetrical with a parabolic distribution. The radar system's unambiguous target detection range is limited by the number of subcodes within ... |
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| Models for Broad Area Event Identification and Yield Estimation: Multiple Coda Types |
Sep 2011 |
9 pages |
| Authors:
W S Phillips; Hans E Hartse; George E Randall; Richard J Stead; Michael L Begnaud; Dale N Anderson; LOS ALAMOS NATIONAL LAB NM
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| Models of laterally varying attenuation and site effects of regional phases and their codas are necessary to correct regional amplitudes to reveal source effects of importance to identification and yield estimation procedures. We accomplish this using 2-D amplitude tomography, incorporating absolute spectral estimates based on precise ratio techniques and moment tensor results. The spectral constraints allow calibration to absolute levels, and can be used to validate amplitude prediction models. Constraints ... |
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| Yield and Depth of Burial Hydrodynamic Calculations in Granodiorite: Implications for the North Korean Test Site |
Sep 2011 |
12 pages |
| Authors:
Esteban Rougier; Christopher R Bradley; Howard J Patton; Earl E Knight; LOS ALAMOS NATIONAL LAB NM
|
| This paper reports on continued research toward establishing a consistent modeling framework for calculating nuclear explosions in earth materials. The model must be consistent with observed phenomena in the near-field by correctly 1) calculating the resulting explosive cavity radius for a given yield and depth of burial, 2) accounting for the correct energy deposition by partitioning it into internal (heat and plastic strain) and kinetic (e.g. radiated seismic) energy, 3) ... |
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| Motion Simulation in the Environment for Auditory Research |
Aug 2011 |
12 pages |
| Authors:
Braxton Boren; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE
|
| Virtual sound source motion has been implemented in the U.S. Army Research Laboratory's Environment for Auditory Research, which contains a 57-channel spherical loudspeaker array located in a semi-anechoic chamber. Using the low-latency PortAudio application programming interface from the Psychophysics Toolbox Version 3, we are able to dynamically update 57 channels of streaming audio in real time using MATLAB for signal processing. Both Distance-Based Amplitude Panning (DBAP) and Vector Base Amplitude ... |
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| Assessment and Quantification of Cumulative Impacts of Training and Land Management Practices on Military Installations |
19 JUL 2011 |
10 pages |
| Authors:
Paul Ayers; TENNESSEE UNIV KNOXVILLE
|
| Military vehicle maneuvers remove vegetation and increase the potential for soil erosion. Quantifying the vegetation removed during military maneuvers is needed to assist land managers in maintaining the environmental integrity of the training area. A terrain-vehicle impact model was used to predict terrain impacts (disturbed width and impact severity), based on vehicle properties, operating characteristics and soil strength properties. The cumulative impact width (CIW), a product of the disturbed width ... |
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| The Solar Neighborhood. XXV. Discovery of New Proper Motion Stars with 0.40 sec/yr > mu > or = 0.18 sec/yr Between Declinations -47 deg and 00 deg |
JUL 2011 |
17 pages |
| Authors:
Mark R. Boyd; Jennifer G. Winters; Todd J. Henry; Wei-Chun Jao; Charlie T. Finch; John P. Subasavage; Nigel C. Hambly; NAVAL OBSERVATORY WASHINGTON DC
|
| We present 2817 new southern proper motion systems with 0.40 sec/yr > mu > or = 0.18 sec/yr and declination between 47 deg and 00 deg. This is a continuation of the SuperCOSMOS-RECONS (SCR) proper motion searches of the southern sky. We use the same photometric relations as previous searches to provide distance estimates based on the assumption that the objects are single main-sequence stars. We find 79 new red ... |
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| Telerehabilitation for OIF/OEF Returnees with Combat-Related Traumatic Brain Injury |
Jun 2011 |
17 pages |
| Authors:
Kris Siddharthan; JAMES A HALEY VETERANS RESEARCH AND EDUCATION FOUNDATION TAMPA FL (VETERANS AFFAIRS)
|
| The telerehabilitation for OEF/OIF returnees with mild or moderate combat related Traumatic Brain Injury (TBI) has as its objectives 1) care coordination for wounded veterans using distance technology via the internet and 2) monitoring of physical and mental health outcomes using a variety of instruments. To date we have enrolled 75 veterans and are actively following 48 in the study. We have collected baseline, 6, 12 and 18 month health ... |
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| Lessons Learned: Implementing BMPs for Munitions Constituent Migration at Operational Ranges |
10 May 2011 |
24 pages |
| Authors:
Jennier Wilber; Julie Dobschuetz; ARCADIS US HIGHLANDS RANCH CO
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| Motion Planning for Steep Hill Climbing |
May 2011 |
9 pages |
| Authors:
Damion Dunlap; Wei Yu; Jr Collins Emmanuel G; Charmane V Caldwell; NAVAL SURFACE WARFARE CENTER PANAMA CITY FL LITTORAL WARFARE SCIENCE AND TECHNOLOGY DEPT
|
| The motors or engines of an autonomous ground vehicles (AGV) have torque and power limitations, which limit their abilities to climb steep hills, which are defined to be hills that have high grade sections in which the vehicle is forced to decelerate. Traversal of a steep hill requires the vehicle to have sufficient momentum before entering the hill. This problem is part of a larger class of momentum-based motion planning ... |
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| A Full Spectrum Case for the Heavy Force |
01 Mar 2011 |
30 pages |
| Authors:
Jr Creed Richard D; ARMY WAR COLL CARLISLE BARRACKS PA
|
| The U.S. Army heavy conventional ground capability that crushed Iraqi forces in 1991 and 2003 no longer exists, and the assumption that the U.S. Army can dominate high intensity ground combat operations for the foreseeable future is questionable. The balance of U.S. Army combat brigades shifted significantly from favoring a heavy force to favoring a lighter force over the past decade. Further reduction of HBCTs based upon assumptions that there ... |
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| Comprehensive Evaluation of Stand-Off Biometrics Techniques for Enhanced Surveillance during Major Events |
Feb 2011 |
117 pages |
| Authors:
DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO) CENTRE FOR SECURITY SCIENCE
|
| The Study Report introduces the concept of stand-off biometric systems: those capable of operating at a greater-than-normal distance between subject and sensor and with less-constrained subject behaviour. While biometric surveillance systems are a type of stand-off biometric system, the two terms are not synonymous, as some stand-off systems call for cooperative subjects, since these will always produce improved performance metrics. Identification of cooperative subjects in stand-off applications is relevant in ... |
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| CCD Photometry of the Open Cluster Tombaugh 5 in the Vilnius System |
Jan 2011 |
14 pages |
| Authors:
J Zdanavicius; F J Vrba; K Zdanavicius; V Straizys; R P Boyle; NAVAL OBSERVATORY FLAGSTAFF AZ
|
| We present the results of eight-color CCD photometry of 674 stars in the direction of the open cluster Tombaugh 5 in Camelopardalis. The stars are observed in the Vilnius system supplemented by the broad-band I filter the field is of 22' diameter, the limiting magnitude is V = 17.7 mag. The catalog contains the coordinates, V magnitudes, seven color indices, two-dimensional spectral types determined from photometric parameters, interstellar extinctions and ... |
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| Maintaining Wireless Connectivity Constraints for Robot Swarms in the Presence of Obstacles |
Jan 2011 |
13 pages |
| Authors:
Joel M Esposito; NAVAL ACADEMY ANNAPOLIS MD DEPT OF WEAPONS AND SYSTEMS ENGINEERING
|
| The swarm paradigm of multirobot cooperation relies on a distributed architecture, where each robot makes its own decisions based on locally available knowledge. But occasionally the swarm members may need to share information about their environment or actions through some type of ad hoc communication channel, such as a radio modem, infrared communication, or an optical connection. In all of these cases robust operation is best attained when the transmitter/receiver ... |
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| The effect of social contexts on network response to emergencies |
Jan 2011 |
7 pages |
| Authors:
Yu-Ru Lin; David Lazer; HARVARD UNIV CAMBRIDGE MA
|
| We study how social communication behaviors change when the population encounters unfamiliar conditions, which has potential to provide insights into improving resource management in response to emergencies and crises, as well as to offer new perspective on information propagation. Using anonymous billing records of 10 million mobile phone subscribers in a western European country from 2007 to 2009, we compare call activity in the immediate aftermath of a set of ... |
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| Scalable Learning for Geostatistics and Speaker Recognition |
Jan 2011 |
197 pages |
| Authors:
Balaji V Srinivasan; MARYLAND UNIV COLLEGE PARK DEPT OF COMPUTER SCIENCE
|
| With improved data acquisition methods, the amount of data that is being collected has increased several fold. One of the objectives in data collection is to learn useful underlying patterns. In order to work with data at this scale, the methods not only need to be effective with the underlying data, but also have to be scalable to handle larger data collections. This thesis focuses on developing scalable and effective ... |
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| Open-Ocean Movements of a Satellite-Tagged Blainville's Beaked Whale (Mesoplodon densirostris): Evidence for an Offshore Population in Hawaii? |
Jan 2011 |
7 pages |
| Authors:
Robin W Baird; Gregory S Schorr; Daniel L Webster; Sabre D Mahaffy; Daniel J McSweeney; M B Hanson; Russel D Andrews; CASCADIA RESEARCH COLLECTIVE OLYMPIA WA
|
| In Hawaiian waters, a single stock of Blainville s beaked whale (Mesoplodon densirostris) is recognized, extending throughout the U.S. Exclusive Economic Zone (EEZ) surrounding the archipelago and into adjacent international waters (Carretta et al., 2011). Abundance within the entire EEZ around Hawai i was estimated at 2,872 individuals based on a large vessel sighting survey (Barlow, 2006), with a single on-effort sighting near the western boundary of the EEZ (Hamilton ... |
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| A Single Point Pressure Approach As Input For Injury Models With Respect To Complex Blast Loading Conditions |
Oct 2010 |
18 pages |
| Authors:
J A Teland; J C van Doormaal; M J van der Horst; E Svinsaes; NORWEGIAN DEFENCE RESEARCH ESTABLISHMENT KJELLER
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| Blast injury models, like Axelsson and Stuhmiller, require four pressure signals as input. Those pressure signals must be acquired by a Blast Test Device (BTD) that has four pressure transducers placed in a horizontal plane at intervals of 90 degrees. This can be either in a physical test setup or in a numerical environment. However, using a BTD for blast injury assessment can be very cost-inefficient since this procedure only ... |
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| A Regional Seismic Travel Time Model for North America |
Sep 2010 |
12 pages |
| Authors:
Stephen C Myers; Michael L Begnaud; Sanford Ballard; Abelardo L Ramirez; W S Phillips; Michael E Pasyanos; Harley Benz; Raymond P Buland; LAWRENCE LIVERMORE NATIONAL LAB CA
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| Monitoring seismic events at ever-lower magnitude thresholds requires the utilization of seismic stations that are close to the event. The proliferation of seismic stations across the globe results in lower seismic detection thresholds because more stations are likely to be at regional distance to an event. However, utilization of arrival time data at regional distances often results in degraded location accuracy, because large variations in regional crust and upper-mantle structure ... |
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| Toward an Empirically-Based Parametric Explosion Spectral Model |
Sep 2010 |
10 pages |
| Authors:
Sean R Ford; William R Walter; Stan D Ruppert; Eric Matzel; Terri F Hauk; Rengin Gok; LAWRENCE LIVERMORE NATIONAL LAB CA
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| Small underground nuclear explosions need to be confidently detected and identified in regions of the world where they have never occurred. We are developing a parametric model of the nuclear explosion seismic source spectrum derived from regional phases (Pn, Pg, Sn, and Lg) that is compatible with earthquake-based geometrical spreading and attenuation. Earthquake spectra are fit with a generalized version of the Brune spectrum, which is a three-parameter model that ... |
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