| Durability of Composite Materials and Structures |
02-Nov-2009 |
15 pages |
| Authors:
Hassan Mahfuz; Richard D Granata; William Hartt; Leif Carlsson; Lawrence Drzal; Dayakar Penumadu; Clive Clayton; William Scott; FLORIDA ATLANTIC UNIV BOCA RATON
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 | This project focused on marine composites and sandwich structures with specific interests on the effects of moisture, seawater, hydrostatic pressure, and temperature on their durability and life prediction. One task revealed fiber changes that occur with nitric acid treatment promoting better engineering design of composite fiber matrix interface and interphase region. Comparative environmental exposures show that moisture absorption was along the F/M interface (wicking). A fracture mechanical model of single ... |
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| Software Systems Stockroom |
Nov-2009 |
107 pages |
| Authors:
Gabor Karsai; James L Panmicka; Douglas A Stuart; Andrew M Vandivort; Christopher P VanBuskirk; BOEING CO ST LOUIS MO
|
| This final report contains a record of activities and a description of project deliverables and results from the Software Systems Stockroom (S3) Phase 1 program, which was executed by Boeing Research & Technology (BR&T) form 05-February-2009 to 02- August-2009. BR&T subcontractors on the effort included Raytheon and Vanderbilt University. The work included development of an open, community-driven, technically focused shared infrastructure that will encourage the capture and reuse of domain ... |
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| Efficient and Secure Repository Access |
Nov-2009 |
84 pages |
| Authors:
Urs A Muller; Alan Plofker; Chris Crudele; Paula Muller; Beat Flepp; NET-SCALE TECHNOLOGIES INC MORGANVILLE NJ
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| The principal contractor, in collaboration with the Corporation for National Research Initiatives (CNRI) demonstrated interoperability and secure sharing between three Digital Object Repository (DOR) and between the DOR repositories and a legacy system as specified in the Use Case of this project. Documentation was delivered on the architecture and the protocols in sufficient detail to allow an independent third party to develop its own DOR implementation and/or to develop a ... |
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| Microstructural Design & Optimization of Highly Filled Epoxy Based Composites |
Nov-2009 |
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| Authors:
Bradley White; Jennifer L Jordan; D W Richards; Jonathan E Spowart; Naresh N Thadhani; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
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 | The dynamic mechanical properties of multi-constituent particulate composites, consisting of individual Ni and Al particles dispersed in an epoxy matrix are investigated in this study. Properties of such composites depend on the mechanical and physical properties of the individual components; their loading density; the shape and size of the particles; the interfacial adhesion; residual stresses; and matrix porosity. These multi-phase particulate composites systems, particularly those with high fill densities, have ... |
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| Diamond/CNT Film Interface for Heat Dissipation in Electronic Devices |
29-Sep-2009 |
10 pages |
| Authors:
Phan Ngoc Minh; VIETNAM ACADEMY OF SCIENCE AND TECHNOLOGY HANOI INST OF MATERIALS SCIENCE (VAST)
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| Commercial thermal matching media such as thermal grease are normally basing on silver. By adding a suitable amount of the CNTs into the commercial silver paste, it is expected to improve the conductivity and the performance of any high power electronic components such as micro-processor, high power laser, high power LED for lighting, and so on. In this research, CNT materials were successfully functionalized to form CNT-COOH and CNT-C6H4NH2. The ... |
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| Spatially-Resolved System for Polarimetric Measurements at Subwavelength Scales |
24-Sep-2009 |
22 pages |
| Authors:
Aristide Dogariu; UNIVERSITY OF CENTRAL FLORIDA ORLANDO SCHOOL OF OPTICS/CREOL
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| This proposal will purchase an Aurora-3 Near-Field Scanning Optical Microscope (NSOM) that has the capability of high, sub-wavelength spatial resolution, improved focusing mechanism, dual-light path design, and accurate probe-to-sample patented measuring capability making it the most advanced NSOM available. The proposed instrumentation offers superior performance in near-field optical characterization and contrast mechanisms with the high resolution of scanning probe microscopy techniques. The acquisition of this equipment will allow the PI ... |
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| Electromagnetic Environmental Effects System Testing |
02-Sep-2009 |
179 pages |
| Authors:
ARMY WHITE SANDS TEST CENTER WHITE SANDS MISSILE RANGE NEW MEXICO SURVIVABILITY VULNERABILITY AND ASSESSMENT DIRECTORATE (SVAD)
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| This Test Operational Procedure (TOP) provides the Electromagnetic Environmental Effects (E3) interface requirements and verification criteria for airborne, sea, space, and ground systems, including associated ordnance, as stated in military standard (MIL-STD)-464A Electromagnetic Environmental Effects Requirement for Systems, as well as ADS-37A-PRF Aeronautical Design Standard for the Electromagnetic Environmental Effects (E3) Performance and Verification Requirements. |
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| An Experimental Study of Fiberglass Composites Containing Metal Wire Joints |
Sep-2009 |
54 pages |
| Authors:
Joseph E Klopfer; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The U.S. Navy has been incorporating increasing amounts of composite materials during construction, especially in the areas of submarine sails and surface ship superstructures. The benefit of using composite material with metal wire layers imbedded is that these metal wire layers may be welded to the steel superstructure of a Naval Vessel resulting in maximum joint strength. Joining a composite structure to a metallic structure required the metal-wire layers to ... |
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| Portable Signals Analysis Solutions Using Signalworks(trademark) : A Process Guide For Analysts And Students |
Sep-2009 |
124 pages |
| Authors:
Eric W Sears; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF INFORMATION SCIENCES
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| Signalworks(trademark) is a signals analysis software suite designed to be installed on Windows and Linux portable computing platforms. The demodulation applications within the program offer considerable processing capability for a variety of signals coupled with a graphical interface that is both easy to use and configure. This thesis examines the process of building test signals within Signalworks and then processing them with the available demodulation applications to define important parameters ... |
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| Acoustic Scattering from an Aluminum Cylinder in Contact with a Sand Sediment: Measurements, Modeling, and Interpretation |
10-Aug-2009 |
17 pages |
| Authors:
Philip L Marston; Kevin L Williams; Steven G Kargl; Eric L Thorsos; David S Burnett; Joseph L Lopes; Mario Zampolli; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| Understanding acoustic scattering from objects placed on the interface between two media requires incorporation of scattering off the interface to the object as well as the reciprocal scattering process. In addition, the contact of the target with the interface may change the dynamics of the target. This class of problems is studied in the particular context of an aluminum cylinder placed on a flattened sand interface. Experimental results are presented ... |
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| An Evaluation and Development Environment for an ARM7-Based Autopilot Using the Atmel SAM7S256 Microcontroller |
Aug-2009 |
18 pages |
| Authors:
Justin L Shumaker; Ainsmar X Brown; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD VEHICLE TECHNOLOGY DIRECTORATE
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| This report provides a detailed procedure for interfacing an Atmel SAM7S256 board with a Linux-based PC. The environment and interface are related to a new autopilot project that is designed around the ARM7 architecture used within the U.S. Army Research Laboratory's Vehicle Technology Directorate. An example project is also discussed as a means to see how the environment operates. |
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| Overcoming Information Overload in the Cockpit |
15-Jul-2009 |
102 pages |
| Authors:
Robert H Kewley; Thomas Deveans; MILITARY ACADEMY WEST POINT NY OPERATIONS RESEARCH CENTER
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| This study is focused on finding new technologies that will convey the most important information to pilots, when they need it, and in a more efficient and effective way than is currently being done across Army Aviation. The ever increasing complex nature of flying and managing an aircraft, especially during an event which degrades pilot awareness, demands a constant search for better ways of portraying aircraft data to the crew ... |
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| Investigation of ELF Signals Associated with Mine Warfare: A University of Idaho and Acoustic Research Detachment Collaboration |
30-Jun-2009 |
69 pages |
| Authors:
Dennis Sullivan; Jeffrey L Young; Robert G Olsen; Christopher L Wagner; IDAHO UNIV MOSCOW
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| The questions that are being asked in this investigation are: (1) once an ELF signal is generated, how far does it propagate and still be detectable and (2) how can such signals be modeled, excited and measured? To this end, the scenario considered is one in which an ELF source of the electric or magnetic kind is located in or above water, such as a lake or ocean. This source ... |
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| Applications of Psychophysiological Measures in Uninhabited Air Vehicle Tasks |
Jun-2009 |
68 pages |
| Authors:
Krystal Thomas; Glenn Wilson; James Christensen; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
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| To enhance the performance of Air Force systems, we must keep the human operator in mind during our development and testing. The work performed has kept this thought at its forefront evidenced by the studies performed. Our objectives have included developing methodologies, tools, and algorithms for real-time psychophysiological assessments and application of operator functional state as well as applying muti-sensory and adaptive interfaces to improve total system performance. |
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| Terahertz Quantum Cascade Structures Using Step Wells And Longitudinal Optical-Phonon Scattering |
Jun-2009 |
129 pages |
| Authors:
Will Freeman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Electron transport properties of terahertz (THz) longitudinal optical (LO)-phonon quantum cascade (QC) structures were modeled, in order to investigate high gain quantum cascade laser (QCL) structures. A new structure, a step well QC structure, was proposed. Under such an arrangement, there are three main energy levels within the step well, where the transition from the upper state to the middle state is at the THz radiative spacing and the transition ... |
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| Raptor: An Empirical Evaluation of an Ecological Interface Designed to Increase Warfighter Cognitive Performance |
Jun-2009 |
197 pages |
| Authors:
Daniel S Hall; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| A prototype interface was developed to support military practitioners with enhanced levels of situation awareness and better decision making as they conduct command and control activities during tactical operations. A laboratory experiment was conducted to evaluate the capability of this interface?s cognitive systems engineering and ecological interface design principles to support critical activities (i.e., assess anticipated enemy actions on friendly force operations). Qualitative tactical simulations and an alternative interface (an ... |
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| Enabling Robust C2 Systems through Evolvable Human-in-the-Loop Data Fusion |
Jun-2009 |
30 pages |
| Authors:
Eric Carlson; Emilie Roth; Jonathan Pfautz; Gerald Powell; Sean Guarino; Samuel Mahoney; Ted Fichtl; Mike Farry; CHARLES RIVER ANALYTICS INC CAMBRIDGE MA
|
| Data fusion systems are being increasingly used to support military planning, decision making, and command and control functions in general. Typically, these systems are designed around the current capabilities of particular data collectors (e.g., sensors) and available processing algorithms. These algorithms incorporate an ontology that reflects the designer's perception of key concepts in the world (e.g., types of threats, classes of vehicles to be tracked) and how these can be ... |
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| Voice-on-Target: A New Approach to Tactical Networking and Unmanned Systems Control via the Voice Interface to the SA Environment |
Jun-2009 |
34 pages |
| Authors:
Eugene Bourakov; Alex Bordetsky; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF INFORMATION SCIENCES
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| Since 2004 the authors have been actively involved in the innovative Tactical Network Topology (TNT) experimentation program, which the Naval Postgraduate conducts quarterly with the United States Special Operations Command (USSOCOM) to explore emerging agile adaptive tactical networks. One of our first findings was a set of solutions enabling rapid adaptation of broadband wireless networks to the commander's needs, which we have named Network-on-Target (Bordetsky and Bourakov, 2006). According to ... |
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| Multi-level Operational C2 Holonic Reference Architecture Modeling for MHQ with MOC |
Jun-2009 |
39 pages |
| Authors:
David L Kleinman; Krishna R Pattipati; Chulwoo Park; CONNECTICUT UNIV STORRS DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| The purpose of this paper is to present a multi-level operational C2 holonic reference architecture that is applicable to Navy maritime headquarters (MHQ) with maritime operations center (MOC) for assessing, planning and executing multiple missions and tasks across a range of military operations. The control architecture consists of three levels: strategic level control (SLC), operational level control (OLC) and tactical level control (TLC). In addition to coordination within each level, ... |
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| Symbiotic Planning: Cognitive-Level Collaboration Between Users and Automated Planners |
Jun-2009 |
50 pages |
| Authors:
Ron Scott; Emilie M Roth; Jeffrey L Wampler; Elizabeth Kean; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
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| As the Department of Defense (DoD) moves into a more agile C2 environment, added requirements will be laid on operators and systems -- integration with outside systems and organizations, operation in an environment where rules change daily, and severely limited resources. We foresee an increased reliance on automated support tools -- optimizers, schedulers, evaluators -- to meet these requirements. These automated tools need to be closely coupled with an operator ... |
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| Stability of Large-Scale Oceanic Flows and the Importance of Non-Local Effects |
Jun-2009 |
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| Authors:
Hristina G Hristova; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| My thesis covers two general circulation problems that involve the stability of large scale oceanic flows and the importance of non-local effects. The first problem examines the stability of meridional boundary currents, which are found on both sides of most ocean basins because of the presence of continents. A linear stability analysis of a meridional boundary current on the beta-plane is performed using a quasi-geostrophic model in order to determine ... |
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| Research Operations for Advanced Warfighter Interface Technologies |
Jun-2009 |
117 pages |
| Authors:
Timothy P Ryan; GENERAL DYNAMICS ADVANCED INFORMATION SYSTEMS DAYTON OH
|
| Execution of the Research Operations for Advance Warfighter Interface Technologies (ROADWIT) contract required a broad range of technical expertise supporting the mission of the Human Effectiveness Directorate (711 HPW/RHC). The mission of 711 HPW/RHC is to develop science and technology that improves the effectiveness of human-human and human-machine interaction within the Air Force. General Dynamics' mission, in support of 711 HPW/RHC research, is to ensure that the human operator is ... |
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| Orion Unmanned Aircraft System JCTD |
Jun-2009 |
|
| Authors:
DIRECTOR DEFENSE RESEARCH AND ENGINEERING WASHINGTON DC RAPID FIELDING DIRECTORATE
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| GAME-CHANGING CAPABILITY: How will Orion change the game? 5-days with 1,000 lb at 15,000 ft * NFOV FMV EO/IR sensor * Comms relay (including laser comms) * Benefits of the Orion UAS: Payload flexibility with open architecture interfaces * Highly autonomous operations * Standards compliant GCS * Reduced O&M manpower when compared to currently fielded systems * Twin certified heavy fuel engines * Redundant avionics systems * Affordable * Autonomous ... |
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| United States Air Force Unmanned Aircraft Systems Flight Plan 2009-2047 |
18-May-2009 |
77 pages |
| Authors:
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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| Unmanned aircraft systems (UAS) and the effects they provide have emerged as one of the most in demand capabilities the USAF provides the Joint Force. The attributes of persistence, endurance, efficiency, and connectivity are proven force multipliers across the spectrum of global Joint military operations. This document presents a USAF Unmanned Aircraft Systems Flight Plan 2009 to 2047. it is an actionable plan, characterized by Doctrine, Organization, Training, Materiel, Leadership ... |
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| LSE Re-Engineering Testbed |
14-May-2009 |
91 pages |
| Authors:
Jami J Shah; ARIZONA STATE UNIV TEMPE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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| The basic premise is that a legacy part design that was originally optimized for one manufacturing process may either be impossible to produce by another process, or too costly. To re-manufacture a replacement part, the original geometry and the material need to be modified; such modification must be done without violating the inter-facing, functional and structural constraints. The Rapid Re-Engineering System (RRES) is envisioned to serve as a bridge. |
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| Terrain Mechanics and Modeling Research Program: Enhanced Vehicle Dynamics Module |
May-2009 |
139 pages |
| Authors:
Randolph A Jones; Daniel C Creighton; George B McKinley; Richard B Ahlvin; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
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| The vehicle dynamics module (VEHDYN 4.0) includes many enhancements to the previously documented and released VEHDYN II model and the internally developed, but not released, VEHDYN 3.0 model. The VEHDYN 3.0 model accepted the vehicle in a settled, or equilibrium, configuration instead of the zero-force configuration (the force acting on each suspension spring is assumed to be zero) required by VEHDYN II. VEHDYN 3.0 also included a special suspension and ... |
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| Moisture-Induced Delayed Alumina Scale Spallation on a Ni(Pt)Al Coating (Preprint) |
Apr-2009 |
32 pages |
| Authors:
James L Smialek; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH GLENN RESEARCH CENTER
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| Delayed scale failure was examined for samples of a Ni(Pt)Al-coated CMSX4 single crystal superalloy, cyclically oxidized at 1150 degrees C for 2000 hr. One sample exhibited accentuated coating grain boundary wrinkling, initiating local alumina scale spallation to bare metal, resulting in a final weight loss of 3.3 milligrams/(square centimeter). Spallation under ambient conditions was monitored with time after cooldown and was found to continue for times up to 24 hr, ... |
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| Interface Conditions for Hybrid RANS/LES Simulations of Complex and Compressible Flows |
06-Mar-2009 |
31 pages |
| Authors:
Ugo Piomelli; Elias Balaras; MARYLAND UNIV COLLEGE PARK DEPT OF MECHANICAL ENGINEERING
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| We have demonstrated the applicability of synthetic turbulence coupled with the controlled-forcing method to generate eddies at the interface between RANS and LES in hybrid calculations. We obtained shorter transition regions and improved model accuracy. Realistic turbulence can be generated within 5 boundary-layer thicknesses of the RANS/LES interface even in cases in which the data supplied by the RANS is inaccurate, or the assumptions on which the forcing is based ... |
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| Upgrading of Existing X-Ray Photoelectron Spectrometer Capabilities for Development and Analysis of Novel Energetic NanoCluster Materials (DURIP) |
Mar-2009 |
7 pages |
| Authors:
David L Allara; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
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| This DURIP proposal was funded to upgrade an existing Kratos Ultra Axis X-ray Photoelectron Spectrometer (XPS) in the Penn State Materials Characterization Laboratory Facility as the primary objective along with an existing RHK, ultrahigh vacuum atomic force microscope (AFM) in the Allara lab as the secondary objective. These acquisitions allow new capabilities for performing experiments directed at synthesizing novel types of discrete heteroatom clusters by highly controlled vapor deposition and ... |
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| Target Acquisition Involving Multiple Unmanned Air Vehicles: Interfaces for Small Unmanned Air Systems (ISUS) Program |
Mar-2009 |
83 pages |
| Authors:
Lamar Warfield; Thomas R Carretta; Airam Gonzalez-Garcia; Michael J Patzek; Sarah E Spriggs; Allen J Rowe; Kristen K Liggett; HUMAN EFFECTIVENESS DIRECTORATE WRIGHT-PATTERSON AFB OH 711 HUMAN PERFORMANCE WING
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| The use of small unmanned aerial vehicles (UAVs) and micro air vehicles (MAVs) in military reconnaissance, surveillance, and target acquisition (RSTA) missions is becoming increasingly widespread. The Supervisory Control Interfaces Branch of the Air Force Research Laboratory is exploring interface design techniques to support multiple-UAV, single-operator employment concepts. These employment concepts require that a single operator monitor manage multiple vehicles and or sensors which may increase visual/cognitive workload and degrade ... |
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| Dynamic Interactions for Network Visualization and Simulation |
Mar-2009 |
111 pages |
| Authors:
Cigdem Yetisti; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| This research effort examines related interface studies, interactive techniques and visualization functions to present the design, development and implementation of a new network visualization framework design. From the interface design perspective, this research presents a prototype design to ease the implementation process. The prototype design is introduced to attempt to better facilitate using multiple network visualization functions meeting user needs. With the usage of the mediator tool, the new network ... |
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| Evolution of the gamma/gamma' Interface Width in a Commercial Nickel Base Superalloy Studied by 3D Atom Probe (Preprint) |
Mar-2009 |
15 pages |
| Authors:
J Tiley; J Y Hwang; R Banerjee; R Srinivasan; H L Fraser; S Nag; A R Singh; NORTH TEXAS STATE UNIV DENTON
|
| The compositional width of the gamma/gamma-prime interface for primary and secondary gamma-prime precipitates in the commercial nickel base superalloy, Rene 88 DT, has been characterized at sub-nanometer resolution using local electrode atom probe (LEAP) tomography. On formation during continuous cooling, the primary gamma-prime precipitates exhibit a very sharp interface while the secondary gamma-prime precipitates exhibit a substantially more diffuse interface. Interestingly, on subsequent isothermal aging at 760 degrees C, the ... |
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| New Numerical Strategies for Transient Interaction of Structures With Fluids and Soils |
Feb-2009 |
7 pages |
| Authors:
Tod A Laursen; John E Dolbow; DUKE UNIV DURHAM NC DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
|
| The research effort in this project constitutes a novel hybridization of techniques developed by the PIs in recent years, concerned on one hand with finite element approaches to the modeling of contact-impact phenomena in solid and structural mechanics, and on the other with eXtended Finite Element Method (XFEM) approaches which are able to advect interfaces through finite element grids without the necessity to mesh these interfaces explicitly. The work described ... |
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| Phoenix Architecture |
Feb-2009 |
120 pages |
| Authors:
Robert Hillman; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| This technical report documents the effort, known as Phoenix, that leveraged all of the existing AFRL expertise and knowledge of Information Management (IM), along with colleagues and customers, to define a Service Oriented Architecture (SOA) based IM solution that will have significant meaning now and well into the foreseeable future. The goal was to define an abstract architecture which defines the concepts and interfaces necessary for an effective set of ... |
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| Evaluation of Visual Alerts in the Maritime Domain. Study 2. Program Modifications |
Feb-2009 |
59 pages |
| Authors:
Shelley Roberts; CAE PROFESSIONAL SERVICES KANATA (ONTARIO)
|
| A Defence Research and Development Canada (DRDC) - Atlantic research program is in progress investigating human performance issues related to the use of automated visual alerts under high workload conditions. Previous research comparing performance of two distinct styles of visual alerts - 'flashing border' versus 'static sidebar' was completed by CAE Professional Services (CAE PS) for DRDC Atlantic. CAE PS was then contracted to modify the existing experimental software and ... |
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| Prediction of Magnetic and Electronic Phenomena in Molecular-Assembled Crystals |
19-Dec-2008 |
4 pages |
| Authors:
Kyungwha Park; Amy Y Liu; Tunna Baruah; GEORGETOWN UNIV WASHINGTON DC
|
| This grant supported two postdoctoral fellows who worked on a variety of problems related to the prediction of materials properties from first principles. Projects included optimization of a parallel code for calculating magnetic anisotropy parameters; application of the method to molecule-based magnets; studies of structural and electronic properties of interfaces between ferromagnets and semiconductors; and investigation and quantification of vibrational contributions to the Van der Waals interaction between molecules. |
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| Recent Progress in Silicon Mems Oscillators |
01-Dec-2008 |
13 pages |
| Authors:
Wan-Thai Hsu; DISCERA INC ANN ARBOR MI
|
| This paper first reviews key milestones in the making of silicon MEMS oscillators and how MEMS resonators can be used as frequency references for electronic systems, starting from silicon resonators device designs with different fabrication processes, to wafer level packaging technologies, to the robustness of volume manufacturing processes. Secondly, as final products, various MEMS oscillators from various companies are compared with quartz crystal oscillators in terms of jitter, power consumption, ... |
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| Aerodynamic Predictions, Comparisons, and Validations Using MissileLab and Missile Datcom (97) |
Dec-2008 |
51 pages |
| Authors:
Hoon H Teo; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Aerodynamic prediction software is often used in the early stages of missile systems designed to quickly and accurately estimate the aerodynamics of a wide variety of missile configuration designs operating over many different flight regimes. It is also possible to use these empirical packages to validate flight data collected from wind tunnel tests and other open sources. Analysis of such data provides users with insights to the performance of a ... |
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| Identifying the Role of Pressure on the Response of Reactive Materials to Thermal Initiation: A Molecular Dynamics Study |
Dec-2008 |
6 pages |
| Authors:
Betsy M Rice; William D Mattson; Anthony D Yau; Timothy P Weihs; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Molecular dynamics (MD) simulations using a first principles-based Embedded-atom-Method (EAM) potential are used to simulate the exothermic alloying reactions of a NiAl bilayer at 1500 K and 1100 K. Both microcanonical (NVE) and isoenthalpic (NPH) MD simulations are used to demonstrate the influence of pressure on atomic mixing and subsequent alloying reaction. The NVE simulations, in which the volume is fixed and in which pressure increases as the exothermic reactions ... |
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| The Use of Field Deployable Instrumentation for the Monitoring of Explosives in Ground Water |
Dec-2008 |
7 pages |
| Authors:
A J Bednar; R A Kirgan; A L Russell; C A Hayes; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
| The use of explosives at military installations has and does provide environmental concerns through soil and groundwater contamination, even after training or manufacturing activities have ceased. The concentration of munitions constituents in ground water is an ongoing concern that requires periodic monitoring. The traditional monitoring scenario requires that large amounts of sample (2 to 4 liters) be shipped overnight, under chain of custody control, to a fixed laboratory for analysis ... |
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| Multi-Robot Guided Autonomy for Indoor Exploration |
Dec-2008 |
8 pages |
| Authors:
Hikaru Fujishima; Edward S Rankin; Mark P Gossage; Ricky C Chng; Ai P New; DSO NATIONAL LABORATORIES SINGAPORE
|
| The effective use of multiple Unmanned Ground Vehicles (UGVs) in an indoor environment can be challenging due to the several environmental and technical constraints. It becomes more challenging when a single operator is required to manage more than one UGV. Hence, there is a need to look into how this can be effectively addressed and to develop the necessary approaches to testing and selecting the solutions. One approach is to ... |
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| Conference on the Physics, Chemistry and Biology of Water (3rd) Held in West Dover, Vermont on October 16-19, 2008 (Abstracts) |
27-Oct-2008 |
34 pages |
| Authors:
Thomas Lowell; VERMONT PHOTONICS TECHNOLOGIES CORP BELLOWS FALLS VT
|
| The 3rd Annual Conference on the Physics, Chemistry and Biology of Water was held in West Dover, Vermont October 16th thru 19th, 2008. The conference was organized by Vermont Photonics Technologies Corporation of Bellows Falls, Vermont, and was attended by an international group of 51 scientists who presented 31 papers during the 4 days. The cost of organizing this event was approximately $43,000, offset by attendance fees, sponsorship by 2 ... |
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| A Real-Time Closed-Loop System for Predicting and Counteracting Lapses of Attention |
07-Oct-2008 |
8 pages |
| Authors:
David A St Kobus; Mark John; Matthew R Risser; PACIFIC SCIENCE AND ENGINEERING GROUP INC SAN DIEGO CA
|
| Vigilance tasks, from driving to surveillance to security remain important and frequent tasks for the U.S. Army. Yet the difficulty users have sustaining vigilance is well known. Augmented cognition offers new methods for supporting sustained vigilance via a closed-loop attention management system (CLAM). A CLAM system monitors operators' psychophysiology for signs of inattention and then triggers a countermeasure to rouse them and help them sustain vigilance and good task performance. ... |
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| Modern Nondestructive Test Methods for Army Ceramic Matrix Composites |
Oct-2008 |
18 pages |
| Authors:
Douglas J Strand; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| As composites have developed and matured, the nondestructive testing (NDT) methods needed to characterize and maintain them have also developed and matured. The purpose of this report is to examine the newer methods of NDT, which may be applicable to some of the new composite materials being used for U.S. Army applications. Ceramic matrix composites (CMC) are potentially good high-temperature structural materials because of their low density, high elastic moduli, ... |
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| JCID Compliant Thin Server for Sensors |
Oct-2008 |
10 pages |
| Authors:
David C Swanson; PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB
|
| The JCID S&T Insertion Project (JSP) is a team effort between a group at Penn State's Applied Research Lab and Lattice/RTI of Herndon, VA to integrate a flexible table-based sensor configuration capability into the JCID/JWARN architecture. Using a reduced set of essential JCID requirements, we successfully implemented the JSP on several COTS PXA-type microprocessors. This is very important as it demonstrates software portability and readiness for future spiral development options. ... |
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| Biotic - Abiotic Interface Between they Body and the Artificial Limb |
29-Sep-2008 |
29 pages |
| Authors:
Kenneth H Church; SCIPERIO INC ORLANDO FL
|
| Intraosseous transcutaneous amputation prostheses (ITAPs) may be able to overcome the problems that stem from the nonuniform distribution of pressure seen in the conventional stump-socket prosthetic replacement devices. While transcutaneous devices have had limited success in amputees. By optimizing the attachment of the skin to the prosthetic, ITAPs may become clinically viable options. Our team has developed a modified titanium construct with a specially machined surface to increase the adherence ... |
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| Design and Implementation of a Motor Incremental Shaft Encoder |
01-Sep-2008 |
119 pages |
| Authors:
La; Andrew M Valley; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Department of Electrical and Computer Engineering at the Naval Postgraduate School continuously develops new design applications and searches for new ways to arm the students with the tools necessary to gain a greater understanding of advanced motor applications. One such tool is the Student Design Center (SDC). The SDC utilizes Field Programmable Gate Array (FPGA) technology for digital control of motor applications. One of the key factors in motor ... |
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| Pylon Effects on a Scramjet Cavity Flameholder Flowfield |
01-Sep-2008 |
204 pages |
| Authors:
Andrew B Freeborn; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| Cavity flameholders in supersonic combustion ramjet (scramjet) combustors, while effective, fail to take advantage of the full combustor volume. Adding a pylon to the leading edge of a cavity flameholder generates a flowfield increasing mass exchange between the cavity and main combustor flow, increasing the mixing interface between flameholder products and main combustor flow, and exhibiting minimal Reynolds number effects. To demonstrate this modified flowfield driven by supersonic expansion behind ... |
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| Experimental Study of Composites and Metal-Wire Joints |
01-Sep-2008 |
51 pages |
| Authors:
William A Schultz; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| In order to join a composite structure to a metallic structure, the metal-wire layers were co-cured with composite layers using the Vacuum Assisted Resin Transfer Molding (VARTM). Then, the interface fracture strength was measured for Mode II fracture for various lay-up and interface conditions. The study includes a metal-wire to composite interface, composite to composite interface, and metal-wire to metal-wire interface. In addition, the lay-up orientations of the metal-wires were ... |
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| Web Access of Meteorological and Oceanographic Data |
Sep-2008 |
9 pages |
| Authors:
Roy Ladner; Frederick E Petry; Bruce Lin; Richard Sween; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MAPPING CHARTING AND GEODESY BRANCH
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| Web Services are becoming the standard technology used to share data for many Navy and other DoD operations. These enable an automated capability to obtain and integrate data for data fusion. However assimilation of data from Web-based sources means that differences in schema and terminology prevent simple querying and retrieval of data. Thus, machine understanding of the Web Services interface is necessary for automated selection and invocation of the correct ... |
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