| Characterization of the Nonlinear Viscoelastic and Adhesive Properties of Polyurea and Characterization of Polyurea-Clad Metallic Structures |
14-Oct-2009 |
121 pages |
| Authors:
K Ravi-Chandar; K M Liechti; TEXAS UNIV AT AUSTIN CENTER FOR MECHANICS OF SOLIDS STRUCTURES AND MATERIALS
|
 | This report describes an experimental effort to characterize the viscoelastic properties of polyurea and the failure of ductile materials at high strain rates. The viscoelastic properties of cast polyurea were determined under monotonic loading conditions, both in the confined compression and Arcan shear configurations. The nonlinear viscoelastic properties have been determined and validated by predicting the large deformation compression behavior. Expanding ring experiments were performed on Al 6061-O, Al 1100-H14 ... |
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| Evaluation of Plume Divergence and Facility Effects on Far-Field Faraday Probe Current Density Profiles |
Sep-2009 |
54 pages |
| Authors:
Daniel L Brown; Alec D Gallimore; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
|
| A Faraday probe with three concentric rings was designed and fabricated to assess the effect of gap width and probe geometry in a systematic study of the Hall thruster plume. The nested Faraday probe consisted of two concentric collector rings and an outer guard ring, which enabled simultaneous current density measurements on the inner and outer collector. Two versions of the outer collector were fabricated to create gaps of 0.5 ... |
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| A Tracer Analysis for the M1002 Training Projectile |
Sep-2009 |
20 pages |
| Authors:
James Garner; Xaiogang Huang; Jason Mishock; John Kostka; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Testing to qualify the M1002 round was conducted in FY08. The M1002 round has met its accuracy requirements as a training round to replace the M831A1. The present configuration achieves acceptable performance but could be improved. This report provides an understanding of some of the tracer's launch conditions, which are important in determining what might be done to further improve tracer performance. |
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| Optimizing the Router Configurations within a Nominal Air Force Base |
Sep-2009 |
63 pages |
| Authors:
Marcus E McNabb; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Routing information is a delicate balance between theoretical ideas such as optimization of flow and shortest path routing and the reality of threats to the security of the network. The way in which information is routed can be massaged to give the best solution, that being one that aptly satisfies both of these constraints. But are the routers on a nominal Air Force base set up with all of these ... |
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| Integration of Robotics and 3D Visualization to Modernize the Expeditionary Warfare Demonstrator (EWD) |
Sep-2009 |
198 pages |
| Authors:
Christian R Fitzpatrick; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In the summer of 2008, the Commandant of the Marine Corps (CMC) released a message to all Marines and Sailors detailing plans to revitalize U.S. naval amphibious competency. Current responsibilities in Iraq and Afghanistan have significantly reduced available training time causing overall amphibious readiness to suffer. In response, this thesis evaluates 3D visualization techniques and other virtual environment technologies available to support these mission-critical training goals. The focus of this ... |
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| IPv6 Tactical Network Management |
Sep-2009 |
223 pages |
| Authors:
John F Dobrydney; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Current and emerging technologies and equipment, such as unmanned aerial vehicles, ground sensors, networked radios, operator-worn sensor vests, and nanotechnology applications offer warfighters unprecedented command and control and information detection capabilities, yet the use of this technology has not been fully realized. The current protocol, IPv4, is incapable of providing enough addresses due to a depletion of IPv4 address space. IPv6, however, offers unprecedented network support for tactical-level sensor and ... |
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| Calibrated Orbiting Object Project (COOP) Code Tip Heater Installation and Characterization |
07-Aug-2009 |
24 pages |
| Authors:
Ben Brown; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
|
| In this experiment, heaters were installed inside the Calibrated Orbiting Object Project (COOP) cone tip for the purpose of controlling the temperature of the cone tip on orbit. Heater performance characterization was accomplished for two different heater configurations and the differences in performance are discussed. Heater performance was characterized by measuring the temperature of the tip at various current set points and comparing these to those predicted by a one-dimensional ... |
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| Mass Spectrometric Analysis of the Electrospray Plume from an Externally Wetted Tungsten Ribbon Emitter |
Aug-2009 |
11 pages |
| Authors:
Yu-Hui Chiu; Brian W Ticknor; Shawn W Miller; AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE
|
| Angle-resolved mass spectrometry in conjunction with retarding potential energy analysis provides information on the mechanisms of ion field evaporation and spatial distributions of the emitted ions and droplets, the latter being of particular importance in the emitter array configuration. In the present study, we conduct mass spectrometric, retarding potential, and angular distribution measurements for ions. The angle resolved measurements indicate that the spray comprises a mixture of droplets and ions. ... |
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| Quantum Enhanced Imaging by Entangled States |
Jul-2009 |
123 pages |
| Authors:
Doyle Nichols; NORTHROP GRUMMAN SYSTEMS CORP LINTHICUM HEIGHTS MD
|
| The use of entangled states in a prospective standoff imaging sensor has been explored. Specifically, the question of whether enhanced performance (in terms of achievable resolution, in particular) may be obtained through the use of entangled states in a ghost imaging configuration has been investigated. The resiliency of such a system in the presence of transmission impairments that necessarily accompany sensors in a tactical environment, such as large optical loss, ... |
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| Scarf Joint Modeling and Analysis of Composite Materials |
Jun-2009 |
77 pages |
| Authors:
Armando Marron; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The objective of this study is to investigate joint strength of the scarf joint configuration, constructed from carbon and glass woven fabric hybrid laminates, with different material combinations. Glass/glass, glass/carbon, carbon/glass, and carbon/carbon are tested under various loading conditions like tension, compression, bending and shear loading. Both experimental and computational studies are conducted. For the experimental study, specimens made of scarf joints using carbon and glass woven fabrics are tested ... |
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| A Computational Study of the Energy Dissipation Through an Acrylic Target Impacted by Various Size FSP |
Jun-2009 |
14 pages |
| Authors:
C G Fountzoulas; J M Sands; P G Dehmer; J H Yu; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Recent advances in the numerical techniques, higher computing power and materials model have allowed the accurate simulation of the ballistic impact into monolithic and multi-layer transparent armor configurations. In the current effort, the velocity profile during the ballistic impact of 0.22-cal and 0.15-cal fragment simulating projectiles (FSP) into a polymethyl-methacrylate (PMMA) target, which was a Plexiglas G manufactured by Atofina Chemicals was simulated using the ANSYS/AUTODYN commercial software. Our successful ... |
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| Sea-Based Ballistic Missile Defense-Background and Issues for Congress |
21-May-2009 |
|
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | As part of its effort to develop an integrated global ballistic missile defense (BMD) system, the Department of Defense (DOD) has modified or is modifying several Navy Aegis cruisers and many Navy Aegis destroyers for BMD operations. DOD has also deployed a large BMD radar -- the Sea-Based X-Band Radar (SBX) -- on a modified floating oil platform. The proposed FY2010 defense budget requests a total of $1,859.5 million for ... |
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| Implicit and P-Multi-Grid Algorithms for High-Order Spectral Difference Method on Unstructured Grids |
May-2009 |
6 pages |
| Authors:
Z J Wang; IOWA STATE UNIV AMES DEPT OF AEROSPACE ENGINEERING
|
| The development of high-order methods (order of accuracy 2nd order) on unstructured grids is widely viewed as a major pacing item in computational fluid dynamics (CFD). Efficient high-order methods capable of handling complex geometries are required to compute vortex dominated flows, and to perform large eddy simulation and direct numerical simulation with complex configurations, and to predict aeroacoustic noise generation and propagation. The primary objective of the present research is ... |
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| Spectral-Based Volume Sensor Prototype, Post-VS4 Test Series Algorithm Development |
30-Apr-2009 |
45 pages |
| Authors:
Daniel A Steinhurst; Jeffrey C Owrutsky; NAVAL RESEARCH LAB WASHINGTON DC
|
| A retrospective analysis was undertaken to better understand the performance trade-offs involved in reducing the sensor count in the Spectral Based Volume Sensor Component Prototype developed as part of the Advanced Volume Sensor Project. Using a portion of the Volume Sensor Test Series 4 (VS4) data, superior performance was retrospectively demonstrated for several potential new configurations than was originally observed during the live VS4 demonstration. Additionally, it was possible to ... |
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| An Analysis of Multiple Configurations of Next-Generation Cathodes in a Low Power Hall Thruster |
Mar-2009 |
151 pages |
| Authors:
John E Rotter; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The research presented here is an effort to integrate an existing hollow cathode design with a low power production Hall thruster in multiple geometries. Both externally- and internally-mounted cathodes were fabricated and operated in conjunction with a Busek BHT-1500 Hall thruster. Three insert materials were evaluated; Cerium Hexaboride (CeB6), Lanthanum Hexaboride (LaB6), and impregnated tungsten. The thruster was operated at a single operating condition for all testing. The operating specifications ... |
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| Model Test Report of a 100,000 Ton Heavy Lift Ship as a Seabased Intermediate Transfer Station |
Mar-2009 |
56 pages |
| Authors:
Richard Mcllwaine; Dan Sheahan; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SHIP SYSTEMS INTEGRATION AND DESIGN DEPARTMENT
|
| This report describes the second phase of sub-scale testing undertaken at for the CISD developed Intermediate Transfer Station (ITS). Phase I testing used a 50,000 ton Heavy Lift Ship (HLS) and concentrated on a med-moor configuration. Phase II introduced a wider range of configurations, including skin-to-skin, bow-to-stern, and varied headings with the use of a HLS approximately twice the size of the small HLS. The main objectives of the Phase ... |
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| MV-22 Osprey: More than Marine Air's Medium-Lift Replacement |
20-Feb-2009 |
|
| Authors:
D W Pope; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| The MV-22 Osprey brings new challenges and possibilities to Marine Corps aviation operations. Because of its unique capabilities, the Osprey has the possibility to develop into a versatile, utility-type role with an expanded mission-essential task list, rather than serving solely as the new medium lift assault support platform. However, the escort role must be addressed in order to better employ the Osprey as an assault support platform. It is up ... |
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| Chemistry and Physics of Analyte Identification in Integrated Nanosensors |
05-Feb-2009 |
21 pages |
| Authors:
Ivan K Schuller; William Trogler; CALIFORNIA UNIV SAN DIEGO LA JOLLA OFFICE OF CONTRACT AND GRANT ADMINISTRATION
|
| This supplement was dedicated to the development and modeling of phthalocyanine based chemical sensors. We used Organic Molecular Beam Epitaxy (OMBE) to prepare phthalocyanine based sensors. We lithographically patterned special electrode configurations and mounted them on a universal commercial carrier chip thus facilitating manufacturability in actual field testable devices closer to reality. Two types of metallo-phthalocyanine (M-Pc) based sensors were prepared; Co-MPc films 12 monolayer thick and 3 different kinds ... |
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| Symposium on Using Mechanics to Discover New Materials. Annual Technical Meeting of the Society of Engineering Science (45th) held in Urbana-Champaign, Illinois on 12-15 October 2008 |
21-Dec-2008 |
32 pages |
| Authors:
Kaushik Dayal; CARNEGIE-MELLON UNIV PITTSBURGH PA OFFICE OF SPONSORED RESEARCH
|
| The objective of this proposal is to support a symposium on using modern theoretical mechanics theories to discover new materials. Examples include low-hysteretic media which would revolutionize actuators and ferromagnetic shape-memory alloys which would provide interesting, reconfigurable antennas. |
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| Nanoscale Transport Optimization |
04-Dec-2008 |
33 pages |
| Authors:
Lisa M Weiland; PITTSBURGH UNIV PA
|
| A generalized modeling tool has been created that facilitates virtual design of active material systems utilizing nanoscale transport. The construct is bio-mimetic in that the stochastic nature of biological transport proteins is utilized as the basis for transport phenomena. The transport response is then coupled to host response (for instance, elastic deformation of the supporting membrane) via finite element analysis. The advantages of this construct are (1) biological transport phenomena ... |
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| Measurements of the Effectiveness of Concave Spherical Dimples for Enhancement of Hot-gas Side Heat Transfer (Preprint) |
04-Dec-2008 |
10 pages |
| Authors:
Stephen A Danczyk; Edward B Coy; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
|
| Measurements of the heat transfer enhancement effects of concave spherical dimples have been performed under hydrogenoxygen hot-fire conditions in a subscale combustion chamber. Seven configurations were tested with a range of area densities from 15-70% and depth to diameter ratios of 0.111 to 0.333. (Additional quantitiative results will included in the form of heat transfer coefficients and Stanton number.) Enhancements of 15-82% relative to a smooth surface were measured. Reynolds ... |
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| UMD/NPS Free Electron Laser Research |
01-Dec-2008 |
77 pages |
| Authors:
Joseph Blau; William B Colson; MARYLAND UNIV COLLEGE PARK
|
| Simulations and theoretical analysis are used to study the development of high-average-power free electron lasers (FELs). Various existing and proposed FELs are studied, in both amplifier and oscillator configurations. Comparisons to experimental results show good agreement in each case. At the outset of this project, short Rayleigh length (SRL) optical cavities were proposed to reduce the optical intensity on the mirrors. Contrary to conventional wisdom, our simulations showed that an ... |
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| AF/NGA GPS Monitor Station High-Performance Cesium Frequency Standard Stability 2007/2008: From NGA Kalman Filter Clock Estimates |
01-Dec-2008 |
15 pages |
| Authors:
Colin P Petersen; Dennis M Manning; NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY ARNOLD MO TECHNICAL TRANSLATIONS
|
| The National Geospatial-Intelligence Agency (NGA) and the United States Air Force (USAF/AF) operate a worldwide network of GPS monitoring stations. The NGA and USAF monitor stations utilize high-performance cesium frequency standards (CFS) and geodetic quality GPS receivers. Products derived from the NGA Monitor Station Network (MSN) include the postprocessed GPS satellite ephemerides, and GPS broadcast ephemeris and clock parameters. The NGA monitor stations are unmanned and operate in non-laboratory environments. ... |
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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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| Capabilities for Magnus Prediction in Subsonic and Transonic Flight |
Dec-2008 |
9 pages |
| Authors:
J DeSpirito; S I Silton; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The Magnus characteristics of three spin-stabilized projectiles were characterized using steady-state RANS and time-accurate RANS/LES computational fluid dynamic simulations. RANS/LES simulations improved the Magnus moment prediction for projectiles with rounded or chamfered bases. No difference was found between the RANS and RANS/LES simulations for the projectile with a sharp-cornered base?either with or without a boattail. The near-body flow field was similar for RANS and RANS/LES simulations; but the RANS/LES simulations ... |
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| Engineering Robust and Functional Vascular Networks in Vivo with Human Adult and Cord Blood-Derived Progenitor Cells |
Dec-2008 |
9 pages |
| Authors:
J M Melero-Martin; J Bischoff; CHILDREN'S HOSPITAL CORP BOSTON MA
|
| The success of therapeutic vascularization and tissue engineering (TE) will rely on our ability to create vascular networks using human cells that can be obtained readily, expanded safely ex vivo and produce robust vasculogenic activity in vivo. We hypothesized that blood derived endothelial progenitor cells (EPCs) have the required proliferative and vasculogenic activity to create vascular networks in vivo. To test this, EPCs were isolated and expanded from human umbilical ... |
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| Theoretical and Numerical Investigation of Polymer-Particle Nanocomposites and their Effective Materials Properties |
Nov-2008 |
8 pages |
| Authors:
Qi Wang; FLORIDA STATE UNIV TALLAHASSEE DEPT OF MATHEMATICS
|
| Polymer paniculate nanocomposites (PNCs) have many industrial and military applications. They can achieve very high mechanical modulus and possess superior transport or barrier properties. The project aimed to study the mesoscopic structure formation during flow processing and the corresponding rheological consequence leading to characterization of material properties in solid states. Significant progress has been made to model the materials and to understand their rheological properties in melt or solution processing ... |
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| Machine-Aided Design of an Air-Launched Missile Defense System |
Nov-2008 |
11 pages |
| Authors:
Mark Homer; Sungyung Lim; Jose Lopez; Michael Corbett; CHARLES STARK DRAPER LAB INC CAMBRIDGE MA
|
| The power of today's computers is altering design methodologies at the system level. Instead of manually comparing and contrasting a dozen or so options for configuring a system, machine aids can now quantitatively evaluate thousands of candidate configuration on the time scale of minutes. We apply a machine aid to improve the design of an air-launched missile defense system that intercepts ballistic targets during both their boost and terminal phases. ... |
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| Hardware-In-The-Loop Power Extraction Using Different Real-Time Platforms (Postprint) |
Nov-2008 |
9 pages |
| Authors:
Mitch Wolff; Michael Corbett; Michael Boyd; John McNichols; Peter Lamm; PC KRAUSE AND ASSOCIATES INC LAFAYETTE IN
|
| Aircraft power demands continue to increase with the increase in electrical subsystems. These subsystems directly affect the behavior of the power and propulsion systems and can no longer be neglected or assumed linear in system analyses. The complex models designed to integrate new capabilities have a high computational cost. Hardware-in-the-loop (HIL) is being used to investigate aircraft power systems by using a combination of hardware and simulations. This paper considers ... |
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| Sea-Based Ballistic Missile Defense - Background and Issues for Congress |
02-Oct-2008 |
|
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| As part of its effort to develop a global ballistic missile defense (BMD) system, the Department of Defense (DOD) has modified three Navy cruisers and 15 Navy destroyers for BMD operations, and has deployed a large BMD radar the Sea- Based X-Band Radar (SBX) on a modified floating oil platform. In August 2008 it was reported that the Navy has decided to increase the number of BMD-capable destroyers from 15 ... |
|
| Potentiation of Prostate Cancer Radiotherapy Using Antiangiogenic and Antitumor Therapies |
01-Oct-2008 |
12 pages |
| Authors:
Bruce M Fenton; ROCHESTER UNIV NY
|
| Various antiangiogenic strategies have proven effective in preclinical tumor models, either as single agents or combined with radiation (RT). The current work aimed to evaluate whether treatment sequencing critically impacts tumor pathophysiological and therapeutic response. Using human prostate tumor models, axitinib, an inhibitor of VEGF receptors, was administered either before or after each daily RT fraction, and pathophysiological changes were monitored. Tumor growth inhibition was equivalent following the two combination ... |
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| Advanced Nondestructive Evaluation (NDE) Sensor Modeling For Multisite Inspection |
Oct-2008 |
167 pages |
| Authors:
Zhiwei Zeng; Yiming Deng; Satish Udpa; R Bossi; B Koltenbah; L Udpa; Liu Xin; BOEING INFORMATION SPACE AND DEFENSE SYSTEMS SEATTLE WA
|
| The Advanced Nondestructive Evaluation (NDE) Sensor Modeling for Multisite Inspection program has developed finite element models (FEM) of electromagnetic NDE for optimizing the inspection of aging aircraft structure. The program found excellent correlation between magnetic field strengths predicted by FEM analysis and experimental values in fastened airframe structure configurations. Applying the FEM analysis to magnetoresistive (MR) sensors inspection problems then provided useful insights into the many parameter effects associated with ... |
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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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| A Constraint Based Approach for Building Operationally Responsive Satellites |
01-Sep-2008 |
146 pages |
| Authors:
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Operational Responsive Space (ORS) program requires flexible and responsive satellites to meet user's needs. Traditional satellite design methods are typically iterative processes that optimize individual components, subsystems, and ultimately the entire satellite. This study focuses on developing a new approach for creating Responsive Satellites (RS) from Plug-and-Play (PnP) components. The aim is to create an approach that quickly evaluates a wide variety of possible satellite configurations and identify the ... |
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| Logistically Constrained Asset Scheduling in Maritime Security Operations |
01-Sep-2008 |
57 pages |
| Authors:
Doyne D Clem; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Operational commanders and planners are challenged with maintaining fleet presence in many environments with limited resources. To add to this challenge, there are further constraints placed upon assets allocated to a given operational commander such as replenishments at sea, multinational exercises, diplomatic port visits, and predetermined in-chop and out-chop dates. In the case of the Combined Maritime Force (CMF), which operates in the FIFTH FLEET Area of Responsibility, these constraints ... |
|
| Influence of Transport Processes on Autoignition of High Molecular Weight Hydrocarbon Fuels in Nonpremixed Flows |
27-Aug-2008 |
18 pages |
| Authors:
Kalyanasundaram Seshadri; CALIFORNIA UNIV SAN DIEGO LA JOLLA
|
| The objective of this research is to obtain an improved understanding of the influences of transport processes, chemical kinetics and flow characteristics on the mechanisms of autoignition of condensed (liquid) hydrocarbon fuels in nonpremixed, nonuniform flows. An experimental and numerical investigation is carried out. The condensed fuels tested are n-heptane and n-decane. Recent experimental investigation of autoignition of liquid hydrocarbon fuels, in particular n-heptane and n-decane, show that at low ... |
|
| REVEAL: Reconstruction, Enhancement, Visualization, and Ergonomic Assessment for Laparoscopy |
Aug-2008 |
32 pages |
| Authors:
W B Seales; KENTUCKY UNIV RESEARCH FOUNDATION LEXINGTON
|
| The goal of this work was to develop and test new technologies, breaking down the barriers that block more surgeons from attaining and continuing to practice (without injury or pain) high levels of skill in minimally invasive surgery (MIS). This project developed new technology by concentrating on three major research thrusts: Smart Image: the project developed and evaluated new approaches for extracting, fusing, and presenting information cues from imagery and ... |
|
| Inlaid Carbon Nanofiber Nanoelectrode Array as Highly Efficient Dielectrophoresis Device for Bacteria Trapping |
Aug-2008 |
3 pages |
| Authors:
Jun Li; HUA CHEN; Prabhu U Arumugam; Alan Cassell; KANSAS STATE UNIV MANHATTAN DEPT OF CHEMISTRY
|
| Dielectrophoresis (DEP) is an effective microelectronic technique for trapping and manipulating biological particles in a microfluidic environment, which relies on the highly asymmetric electric field gradient created by the microelectrodes. Here we demonstrate an AC DEP technique for single-bacteria trapping using nanoelectrode arrays (NEAs) in a points-and-lid configuration. The NEA is based on vertically aligned carbon nanofibers (CNFs) embedded in SiO2 matrix. The miniaturization of the electrode size provides a ... |
|
| Al Ager Water Compact Unit, Nassriya, Iraq |
22-Jul-2008 |
24 pages |
| Authors:
Angelina Johnston; Todd Criswell; OFFICE OF INSPECTOR GENERAL ARLINGTON VA SPECIAL INSPECTOR GENERAL FOR IRAQ RECONSTRUCTION
|
| The Special Inspector General for Iraq Reconstruction initiated this project assessment as part of its continuing assessments of selected activities of the Economic Support Fund. SIGIR conducted this project assessment in accordance with the Quality Standards for Inspections issued by the President's Council on Integrity and Efficiency. The assessment team included a professional engineer/inspector and an auditor/inspector. |
|
| Sea-Based Ballistic Missile Defense - Background and Issues for Congress |
01-Jul-2008 |
|
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| As part of its effort to develop a global ballistic missile defense (BMD) system, the Department of Defense (DOD) is modifying 18 Navy cruisers and destroyers for BMD operations, and has deployed a large BMD radar the Sea-Based X-Band Radar (SBX) on a modified floating oil platform. The eventual role of sea-based systems in the worldwide U.S. BMD architecture has not been determined. The overall issue for Congress discussed in ... |
|
| Performance of a Hopping Rotochute |
23-Jun-2008 |
34 pages |
| Authors:
Mark Costello; Eric Beyer; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
|
| Future military operations will rely much more heavily on robotic systems to perform a variety of missions. Ultimately, the success of these robots lies in the basic robot configuration being properly tailored to the intended application. A new hybrid micro vehicle configuration, called a hopping rotochute has been created. The hopping rotochute configuration is optimized to operate within small interior spaces. The vehicle is propelled upward by a small rotor ... |
|
| Analysis of Ticonderoga Class Cruiser Operating Targets for Other Consumables, Repair Parts, and Administrative Expenditures |
01-Jun-2008 |
145 pages |
| Authors:
Jeffery S Mills; Jason C Warner; Rush; Edison C III; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this project is to analyze Ticonderoga Class Cruiser Operating Targets (OPTAR) for the Atlantic Fleet (LANTFLT) and the Pacific Fleet (PACFLT). The scope of the analysis focused on the Ticonderoga Class Cruisers -- the surface combatants with the least amount of configuration differences among the class. This project was conducted with the sponsorship and assistance of Commander Naval Surface Forces (CNSF). The goal of this project is ... |
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| Evaluation of Nanocomposites as Lightweight Electronic Enclosures for Satellites' Applications |
JUN 2008 |
98 pages |
| Authors:
Benjamin T. Harder; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The United States military is exploring the use of nanocomposite materials for satellite structural applications. Current composite spacecraft structures are nonconductive and must have expensive shielding materials applied in order to protect the spacecraft from catastrophic damage that can be caused by electromagnetic interference (EMI) and/or electrostatic discharge (ESD) which are characteristics of the space environment. Conductive nanocomposites are being developed for spacecraft structures that will provide ESD and EMI ... |
|
| Performance Optimization for Pattern Recognition Using Associative Neural Memory |
Jun-2008 |
15 pages |
| Authors:
Michael Moore; Richard Linderman; Qing Wu; Qinru Qiu; Prakash Mukre; Tom Renz; Daniel Burns; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| This paper describes the performance optimization in software and hardware solutions for a cognitive computing model called Brain State in a Box (BSB). This BSB model is implemented using two different configurations of the proposed architecture. The first implementation is a software only approach using the Cell Broadband Engine. The other implementation is a hybrid configurable computing platform which uses Field Programmable Gate Array (FPGA) for implementing the computation. To ... |
|
| Multiscale Modeling and Computation of Liquid Crystal Polymers, Polymer Blends, and Polymer Nanocomposites: Investigation of Rheology and Material Properties |
15 APR 2008 |
11 pages |
| Authors:
Qi Wang; FLORIDA STATE UNIV TALLAHASSEE DEPT OF MATHEMATICS
|
| High-performance polymeric materials such as liquid crystal polymers and polymer nano-particle composites have many military applications. The project aimed to study the mesoscopic structure formation during flow processing and characterization of material properties in solid states. Significant progress has been made to model the materials and to understand their rheological properties in melt or solution processing. Electrical and thermal conduction properties of the nanocomposites are characterized by the low volume ... |
|
| Image Science Research for Speckle-based LADAR (Speckle Research for 3D Imaging LADAR) |
03 APR 2008 |
32 pages |
| Authors:
Nicholas George; ROCHESTER UNIV NY OFFICE OF RESEARCH AND PROJECT ADMINISTRATION
|
| We propose a basic study of image science topics related to a new class of speckle-based laser-ranging radars (LADAR). For this imaging radar we study two basic system configurations: a wavefront sensing configuration and an imaging configuration. Three major research projects are (1) study of speckle patterns to establish 3D qualitative features for a remote object (2) study of performance of this compact ladar at photon counting light levels and ... |
|
| Advanced Electron Guns and Depressed Collectors Design and Optimization Using the MICHELLE / ANALYST Environment |
Apr-2008 |
3 pages |
| Authors:
Eric nelson; Ben Held; John Petillo; Baruch Levush; John DeFord; Dimitrios Panagos; STAAR INC MEQUON WI
|
| Next generation vacuum electron devices under development for millimeter and sub-millimeter wavelengths are often characterized by very small features that must be very precisely designed and manufactured for proper tube function and longevity. In this regime the need for automated physics-based optimization to aid the designer in meeting device performance specificaitons is much more critical than in larger, lower frequency devices where prototyping and experimentation are more readily performed. Recent ... |
|
| A Streamer-Like Atmospheric Pressure Plasma Jet (Postprint) |
APR 2008 |
5 pages |
| Authors:
Brian L. Sands; Biswa N. Ganguly; Kunihide Tachibana; UES INC DAYTON OH
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| The properties of an atmospheric pressure plasma jet (APPJ) are examined in a single-cell dielectric capillary configuration. In contrast to some other flow-driven APPJs, this stable, cold plasma jet is electrically driven, composed of rapidly propagating ionization fronts with speeds of the order of 107 sq cm. Using spatially and temporally resolved optical diagnostics, it is demonstrated that the plasma jet is initiated independent of the dielectric barrier discharge inside ... |
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| Grain Boundary Conductivity in Crystalline LiTi2(PO4)3 |
APR 2008 |
14 pages |
| Authors:
Jeff Wolfenstine; ARMY RESEARCH LAB ADELPHI MD
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| Recently, there has been a renewed interest in the development of high energy Li-Air batteries. One configuration involves the use of a Li anode in a non-aqueous electrolyte, which is separated from an aqueous electrolyte containing the air cathode by a solid state Li-ion conducting membrane. Several solid state polycrystalline Li-ion conductors, based on pervoskite (1,2), garnet (3,4) and NASICON (Na super ion conductor) (5 through 12) structures, are under ... |
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| Advanced Cathodes for Next Generation Electric Propulsion Technology |
01-Mar-2008 |
174 pages |
| Authors:
Dustin J Warner; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| The research presented here investigated the feasibility of a 6.4 mm Lanthanum Hexaboride (LaB6) and Cerium Hexaboride (CeB6) hollow cathode for low power electric propulsion applications (100-300W). Two orifice geometries, one anode configuration, several anode and keeper currents, and a range of flow rates were tested for the LaB6 cathode. The CeB6 cathode underwent the same tests, with the exception of the second orifice geometry due to time constraints. The ... |
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