| HQ Air National Guard Bureau Request for Hazardous Materials Waiver per AFMAN 24-204 for the MODS-75 |
28 Nov 2012 |
7 pages |
| Authors:
Peter Lurker; SCHOOL OF AEROSPACE MEDICINE WRIGHT PATTERSON AFB OH OCCUPATIONAL AND ENVIRONMENTAL HEALTH DEPT
|
 | Headquarters Air National Guard Bureau Command requested the U.S. Air Force School of Aerospace Medicine provide modeling data of the maximum oxygen concentration aboard mobility aircraft used by the Air National Guard (C-130, C-5, C-17, KC-10, and KC-135) when transporting a liquid oxygen unit, the Mass Oxygen Distribution System (MODS-75). The AIHA Press mathematical model for estimating occupational exposure to chemicals was used to estimate the maximum oxygen level in ... |
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| Design and Performance Evaluation of a 200 deg C Interleaved Boost Converter (Preprint) |
Sep 2012 |
22 pages |
| Authors:
James D Scofield; Seana A McNeal; Brett A Jordan; Hiroyuki Kosai; Biswajit Ray; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AEROSPACE SYSTEMS DIR
|
| Recent advances in SiC power semiconductor technology and resulting availability of SiC Schottky rectifiers and controlled devices (BJTs, JFETs, and MOSFETs) make it possible to design and implement power converters capable of operating at 200oC. The design, prototype development, operation, and testing of a 74 kHz, 2 kW, 100 V/270 V inversely-coupled, interleaved, dc-dc boost converter over the 20oC to 200oC temperature range is presented in this paper. The advantages ... |
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| Formal System Verification - Extension 2 |
08 Aug 2012 |
28 pages |
| Authors:
June Andronick; Gerwin Klein; NEW SOUTH WALES UNIV SYDNEY (AUSTRALIA)
|
| The goal of this project is to provide an initial framework prototype for efficient performing formal proofs of targeted security or safety properties about large, complex software systems, which is generic in terms of the targeted property for the system and minimizes the verification effort while providing high-assurance guarantees at the source code level. The framework takes as input the concrete implementation (translated into formal logic) of any system made ... |
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| How to Use Calibration Errors to Determine Measurement Uncertainty |
Aug 2012 |
28 pages |
| Authors:
James L Taylor; AIR FORCE MATERIEL COMMAND ARNOLD AFB TN ARNOLD ENGINEERING DEVELOPMENT CENTER
|
| This report illustrates two methodologies to establish measurement uncertainty for a family of digital pressure transducers using calibration data. The lumped method assumes calibration data at each input level are statistically independent and lumps all errors together into a single population without regard to pressure level. Descriptive statistics are used to define population parameters that become the basis for measurement uncertainty. The grouped method groups errors according to input level ... |
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| Application of Multi-Input Multi-Output Feedback Control for F-16 Ventral Fin Buffet Alleviation Using Piezoelectric Actuators |
22 Mar 2012 |
126 pages |
| Authors:
Tomoyuki D Ono; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Control of structural vibrations has been a popular topic. Use of MFC piezoelectric actuators and co-located sensors allows for an active rather than passive control method. The F-16 ventral fin is susceptible to buffet induced vibrations and is a perfect test structure for active vibration control for flight-testing. The research follows the previous ACTIVE FIN project and improves on the design by increasing the number of actuator layers, available actuator ... |
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| Slow Computing Simulation of Bio-plausible Control |
Mar 2012 |
32 pages |
| Authors:
Alec Koppel; Vishnu Ganesan; Alma Wickenden; William Nothwang; Robert Proie; Brian Sadler; ARMY RESEARCH LAB ADELPHI MD
|
| In order to implement control methods on low power, size-constrained systems, significant departures from standard approaches are needed. We look to biology for inspiration and focus on the problem of attitude stabilization through visual input alone. Bio-plausibility broadly refers to the ability of an operation to be carried out on a neural substrate or a parallel asynchronously operating computation scheme. One method of realizing such an asynchronous, parallel computing capability ... |
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| Design Proposal for a Highly Robust Peripheral Input Device Switch for a Multi-Level Secure System |
Mar 2012 |
91 pages |
| Authors:
Douglas C Tanner; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A number of commercial vendors have tried to develop peripheral input device switches to provide high robustness, but most fail to achieve the assurance level necessary for use in a multi-level secure system. This paper provides the groundwork for designing a highly robust peripheral input device switch for Universal Serial Bus (USB) keyboards and mice by defining the requirements, the external and internal interfaces, the data flows, and the state ... |
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| Spin-Torque Microwave Detectors |
06 Feb 2012 |
24 pages |
| Authors:
Oleksandr V Prokopenko; Ilya N Krivorotov; Thomas J Meitzler; Elena Bankowski; Vasil S Tiberkevich; Andrei N Slavin; OAKLAND UNIV ROCHESTER MI DEPT OF PHYSICS
|
| It is known that the spin-transfer torque (STT) effect provides a new method of manipulation of magnetization in nano-scale objects. According to the STT effect bias DC current traversing magnetic multilayers can transfer angular magnetic moments from one layer to another, which can give rise to the micro-wave dynamics of magnetization in the layer. However, it is clear that an inverse effect is also possible. This inverse effect leads to ... |
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| Fuzzing: The State of the Art |
Feb 2012 |
55 pages |
| Authors:
Richard McNally; Ken Yiu; Duncan Grove; Damien Gerhardy; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)
|
| Fuzzing is an approach to software testing where the system being tested is bombarded with test cases generated by another program. The system is then monitored for any flaws exposed by the processing of this input. While the fundamental principles of fuzzing have not changed since the term was first coined, the complexity of the mechanisms used to drive the fuzzing process have undergone significant evolutionary advances. This paper is ... |
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| Influences On The Oceanic Biogeochemical Cycling Of The Hybrid-Type Metals: Cobalt, Iron, And Manganese |
Feb 2012 |
300 pages |
| Authors:
Abigail E Noble; MASSACHUSETTS INST OF TECH CAMBRIDGE JOINT PROGRAM IN APPLIED OCEAN SCIENCE AND ENGINEERING
|
| Trace metal cycling is one of many processes that influence ocean ecosystem dynamics. Cobalt, iron, and manganese are redox active trace metal micronutrients with oceanic distributions that are influenced by both biological and abiotic sources and sinks. Their open ocean concentrations range from picomolar to nanomolar, and their bioavailabilities can impact primary production. Understanding the biogeochemical cycling of these hybrid-type metals with an emphasis on cobalt was the focus of ... |
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| Design Insights for MapReduce from Diverse Production Workloads |
25 Jan 2012 |
15 pages |
| Authors:
Yanpei Chen; Sara Alspaugh; Randy H Katz; CALIFORNIA UNIV BERKELEY DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| In this paper, we analyze seven MapReduce workload traces from production clusters at Facebook and at Cloudera customers in e-commerce, telecommunications media, and retail. Cumulatively, these traces comprise over a year's worth of data logged from over 5000 machines, and contain over two million jobs that perform 1.6 exabytes of I/O. Key observations include input data forms up to 77% of all bytes, 90% of jobs access KB to GB ... |
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| Background Knowledge in Learning-Based Relation Extraction |
Jan 2012 |
120 pages |
| Authors:
Quang X Do; ILLINOIS UNIV AT URBANA-CHAMPAIGN
|
| In this thesis, we study the importance of background knowledge in relation extraction systems. We not only demonstrate the bene ts of leveraging background knowledge to improve the systems' performance but also propose a principled framework that allows one to effectively incorporate knowledge into statistical machine learning models for relation extraction. Our work is motivated by the fact that relation extraction systems in the literature usually use evidence that is ... |
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| Giant Field Localization in 2-D Photonic Crystal Cavities with Defect Resonances: Bringing Nonlinear Optics to the W/cm2 Level |
Jan 2012 |
8 pages |
| Authors:
Nadia Mattiucci; Mark J Bloemer; Giuseppe D'Aguanno; AEGIS TECHNOLOGIES GROUP INC HUNTSVILLE AL NANOGENESIS DIV
|
| We investigate the field localization properties in a 2-D photonic crystal cavity with defect resonances. Although based on a simple geometry, these resonances achieve extremely high quality (Q)-factors 108. We provide an example of a chalcogenide glass (As2S3) photonic crystal cavity where all-optical switching at telecommunication wavelengths can be obtained for input intensity W/cm2 and local field intensity in the crystal well below the photodarkening threshold of the material. |
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| Linear-Quadratic Control of a MEMS Micromirror using Kalman Filtering |
Dec 2011 |
91 pages |
| Authors:
Jamie P Schnapp; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The deflection limitations of electrostatic flexure-beam actuators are well known. Specifically, as the beam is actuated and the gap traversed, the restoring force necessary for equilibrium increases proportionally with the displacement to first order, while the electrostatic actuating force increases with the inverse square of the gap. Equilibrium, and thus stable open-loop voltage control, ceases at one-third the total gap distance, leading to actuator snap-in. A Kalman Filter is designed ... |
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| Developing a Model Fusion Center to Enhance Information Sharing |
Dec 2011 |
115 pages |
| Authors:
Walter E Smith; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Fusion Centers are in a unique position to provide the necessary collaborative space to bring the federal intelligence community together with state, local and tribal initiatives to support homeland security efforts at the grass roots level. Fusion Centers are described as a collaborative effort of two or more agencies to share, or more importantly, fuse information or data from multiple sources. Although, fusion centers have developed at different intervals, the ... |
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| Applications of Flocking Algorithms to Input Modeling for Agent Movement |
Dec 2011 |
8 pages |
| Authors:
Dashi Singham; Meredith Therkildsen; Lee Schruben; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Simulation flocking has been introduced as a method for generating simulation input from multivariate dependent time series for sensitivity and risk analysis. It can be applied to data for which a parametric model is not readily available or imposes too many restrictions on the possible inputs. This method uses techniques from agent-based modeling to generate a flock of boids that follow the data. In this paper, we apply simulation flocking ... |
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| Preconditioner Circuit Analysis |
Sep 2011 |
87 pages |
| Authors:
Matthew J Nye; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Voltages up to 10,000 volts or higher must be attenuated and measured to provide control feedback for many applications like medium voltage generators or pulsed power systems. How these medium voltage signals can be conditioned so that they can be input to analog control circuits or analog-to-digital converters is the focus of this thesis. A preconditioner circuit takes as input a medium voltage signal and outputs a low voltage conditioned ... |
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| Mine Burial Expert System for Change of MIW Doctrine |
Sep 2011 |
160 pages |
| Authors:
Christopher M Beuligmann; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Mine impact burial models such as IMPACT25, IMPACT28, and IMPACT35 have been used in the MIW community in an attempt to calculate the percentage of impact burial for sea mines. Until recently the models have been deterministic, using parameters such as sediment type, air and sea trajectories, drop angle, and mine type to calculate the percentage of burial. These models have been relatively effective in calculating impact burial, but little ... |
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| Extracting Forensic Artifacts from Windows O/S Memory |
30 Aug 2011 |
|
| Authors:
James S Okolica; Gilbert L Peterson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| Memory analysis is a rapidly growing area in both digital forensics and cyber situational awareness (SA). Memory provides the most accurate snapshot of what is occurring on a computer at a moment in time. By combining it with event and network logs as well as the files present on the filesystem, an analyst can re-create much of what has occurred and is occuring on a computer. The Compiled Memory Analysis ... |
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| Basic Lessons in ORA and AutoMap 2011 |
13 Jun 2011 |
121 pages |
| Authors:
Kathleen M Carley; Dave Columbus; CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE
|
| ORA is a network analysis tool that detects risks or vulnerabilities of an organization's design structure. The design structure of an organization is the relationship among its personnel, knowledge, resources, and tasks entities. These entities and relationships are represented by the Meta-Matrix. Measures that take as input a Meta-Matrix are used to analyze the structural properties of an organization for potential risk. ORA contains over 100 measures which are categorized ... |
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| Coherent Noise Rejection in a Three-Phase Power Inverter |
JUN 2011 |
55 pages |
| Authors:
Daniel G. Wheaton; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| In this thesis, we discuss the design of a controller to reject the effects of high order harmonics in a three-phase power inverter. Specifically, coherent noise in the fifth harmonic is considered, as it seems to be dominant in most applications. The controller used in this power inverter operates in a reference frame synchronous with the 60 Hz line voltage. This transformation effectively changes the desired 60 Hz sine wave ... |
|
| Segmented Mirror Telescope Model and Simulation |
JUN 2011 |
69 pages |
| Authors:
Travis W. Axtell; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Segmented Mirror Telescope (SMT) housed at the Naval Postgraduate School is a unique, state-of-the-art optical instrument built to explore new technologies needed for future space-based telescopes. A discrete Fourier transform wavefront reconstruction technique developed at Lawrence Livermore National Laboratory is discussed in this thesis as applied to a hexagonal aperture. A Fourier domain implementation of a spatial-frequency modal controller for a simple spring-mass model of a deformable mirror surface ... |
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| Improving the Accuracy and Scalability of Discriminative Learning Methods for Markov Logic Networks |
MAY 2011 |
161 pages |
| Authors:
Tuyen N. Huynh; TEXAS UNIV AT AUSTIN
|
| Many real-world problems involve data that both have complex structures and uncertainty. Statistical relational learning (SRL) is an emerging area of research that addresses the problem of learning from these noisy structured/ relational data. Markov logic networks (MLNs), sets of weighted rstorder logic formulae, are a simple but powerful SRL formalism that generalizes both rst-order logic and Markov networks. MLNs have been successfully applied to a variety of real-world problems ... |
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| Fast Hardware Computation of x mod z |
MAY 2011 |
5 pages |
| Authors:
J. T. Butler; T. Sasao; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We show a high-speed hardware implementation of xmod z that can be pipelined in O(n - m) stages, where x is represented in n bits and z is represented in m bits. It is suitable for large x. We offer two versions. In the first, the value of z is fixed by the hardware. For example, using this circuit, we show a random number generator that produces more than 11 ... |
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| Capacity of Byzantine Consensus with Capacity-Limited Point-to-Point Links |
31 Mar 2011 |
14 pages |
| Authors:
Guanfeng Liang; Nitin Vaidya; ILLINOIS UNIV AT URBANA-CHAMPAIGN
|
| In our previous work [5, 4, 6],we investigated the capacity of the broadcast version of the Byzantine agreement problem[3] in networks where communications links are capacity limited. In this report, we are going to study capacity of the consensus version of the Byzantine agreement problem. The Byzantine consensus problem considers n nodes, namely P1, ..., Pn, of which at most f nodes may be faulty and deviate from the algorithm ... |
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| Impact of Input Uncertainty on Failure Prognostic Algorithms: Extending the Remaining Useful Life of Nonlinear Systems |
Oct 2010 |
8 pages |
| Authors:
Derek Edwards; Marcos E Orchard; Liang Tang; Kai Goebel; George Vachtsevanos; GEORGIA INST OF TECH ATLANTA SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This paper presents a novel set of uncertainty measures to quantify the impact of input uncertainty on nonlinear prognosis systems. A Particle Filtering-based method is also presented that uses this set of uncertainty measures to quantify, in real time, the impact of load, environmental, and other stresses for long-term prediction. Furthermore, this work shows how these measures can be used to implement a novel feedback correction loop aimed to suggest ... |
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| Spike Train Driven Dynamical Models for Human Actions |
Jun 2010 |
9 pages |
| Authors:
Michalis Raptis; Kamil Wnuk; Stefano Soatto; CALIFORNIA UNIV LOS ANGELES DEPT OF COMPUTER SCIENCE
|
| We investigate dynamical models of human motion that can support both synthesis and analysis tasks. Unlike coarser discriminative models that work well when action classes are nicely separated, we seek models that have finescale representational power and can therefore model subtle differences in the way an action is performed. To this end, we model an observed action as an (unknown) linear time-invariant dynamical model of relatively small order driven by ... |
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| System Behavior Specification Using IEEE Std 1175.4 |
27 Apr 2010 |
31 pages |
| Authors:
Dwayne L Knirk; SANDIA NATIONAL LABS ALBUQUERQUE NM
|
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| Dynamics and Control of a Biomimetic Vehicle Using Biased Wingbeat Forcing Functions: Part 1 - Aerodynamic Model (Postprint) |
Jan 2010 |
36 pages |
| Authors:
David B Doman; Michael W Oppenheimer; David O Sigthorsson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| An aerodynamic model, for a minimally actuated flapping wing micro air vehicle (FWMAV), is derived from blade element theory. The vehicle considered in this work is similar to the Harvard RoboFly, except that it is equipped with independently actuated wings. A blade element-based approach is used to compute both instantaneous and cycle-averaged forces and moments for a specific type of wingbeat motion that enables nearly decoupled, multi-degree-of-freedom control of the ... |
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| A Simulation Tool for the Duties of Computer Specialist Non-Commissioned Officers on a Turkish Air Force Base |
Sep-2009 |
96 pages |
| Authors:
Sethat Camur; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Staff assignment is one of the major problems in many lines of business. Knowing that the human being is one of the most expensive and demanding resources, efficient personnel employing becomes significant. Simulation techniques can help accomplish effective staff assignments. The aim of this thesis is to create a simulation tool by using a prototypical model of the computer system specialist non-commissioned officers? jobs on a Turkish Air Force Base, ... |
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| Dynamics and Control of a Minimally Actuated Biomimetic Vehicle: Part 1 - Aerodynamic Model (Postprint) |
Aug 2009 |
27 pages |
| Authors:
David B Doman; Michael W Oppenheimer; David O Sigthorsson; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| An aerodynamic model for the forces and moments acting on a minimally actuated flapping wing micro air vehicle (FWMAV) are derived from blade element theory. The proposed vehicle is similar to the Harvard RoboFly that accomplished the first takeoff of an insect scale flapping wing aircraft, except that it is equipped with independently actuated wings and the vehicle center-of-gravity can be manipulated for control purposes. Using a blade element-based approach, ... |
|
| The Effect of Variable Gravity on the Cooling Performance of a Partially-Confined FC-72 Spray |
Jul-2009 |
214 pages |
| Authors:
John McQuillen; Travis E Michalak; Kirk L Yerkes; Scott K Thomas; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| This thesis discusses the effects of a variable-gravity environment on the performance of a subcooled partially-confined spray. An experiment, consisting of a test chamber, the associated flow loops, and instrumentation, was fabricated and flown on the NASA Reduced-Gravity Testing Platform. This modified KC-135 aircraft followed a parabolic flight path to provide various acceleration levels. The spray chamber contained two opposing nozzles spraying onto Thick Film Resistor (TFR) heaters, which were ... |
|
| Complex Variable Methods for Fatigue Sensitivity Analysis (Preprint) |
Apr-2009 |
13 pages |
| Authors:
A Voorhees; R Bagley; H Millwater; TEXAS UNIV AT SAN ANTONIO DEPT OF MECHANICAL ENGINEERING AND BIOMECHANICS
|
| Complex variable, numerical differentiation techniques have proven useful in many fields of engineering analysis. Complex Taylor series expansion and Fourier differentiation are two such complex variable methods. This paper adapts the use of both complex Taylor series expansion and Fourier differentiation for fatigue sensitivity analysis. The sensitivity of the number of cycles to failure to input parameters and initial conditions has been determined by traditional numerical differentiation techniques as well ... |
|
| Adaptive Pareto Set Estimation for Stochastic Mixed Variable Design Problems |
Mar-2009 |
139 pages |
| Authors:
Christopher D Arendt; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Many design problems require the optimization of competing objective functions that may be too complicated to solve analytically. These problems are often modeled in a simulation environment where static input may result in dynamic (stochastic) responses to the various objective functions. System reliability, alloy composition, algorithm parameter selection, and structural design optimization are classes of problems that often exhibit such complex and stochastic properties. Since the physical testing and experimentation ... |
|
| Information and Motion Pattern Learning and Analysis Using Neural Techniques |
28-Feb-2009 |
11 pages |
| Authors:
Brad Rhodes; Neil Bomberger; Majid Zandipour; Denis Garagic; James Dankert; BAE SYSTEMS ADVANCED INFORMATION TECHNOLOGIES INC BURLINGTON MA
|
| This work addressed the development and application of neural models for higher-level information fusion at Levels 2+/3 according to the JDL Data Fusion Group Process Model. We explored several new concepts based on insights from neural processing, learning, and representation. Building on some initial prior work under AFOSR sponsorship, we continued investigation of mechanisms to rapidly and incrementally learn models of normal behavior exhibited by moving tracked entities. These models ... |
|
| MissileLab User's Guide |
Feb-2009 |
84 pages |
| Authors:
Lamar M Auman; Kristina Kirby-Brown; ARMY AVIATION AND MISSILE RESEARCH DEVELOPMENT ENG CTR REDSTONE ARSENAL AL SYSTEM SIMULATION AND DEVELOPMENT DIRECTORATE
|
| MissileLab is a Microsoft Window based, Graphical User Interface (GUI) written in Visual Basic, that assist the user in running several Missile Aerodynamic Prediction codes. MissileLab allow the aerodynamic to input one set of geometry and atmospheric conditions and then run several aerodynamic prediction codes with the click of a button. MissileLab creates input files and for and executes Missile DATCOM, AeroPrediction Code (AP98, AP02, and AP05), NEAR MISL3, MISDL ... |
|
| Development Strategy for Effective Sampling to Detect Possible Nutrient Fluxes in Oligotrophic Coastal Reef Waters in the Caribbean |
Jan-2009 |
14 pages |
| Authors:
W G Mendoza; R G Zika; J E Corredor; J S Morrel; D Ko; C N Mooers; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The stress contributed by nutrients to the coral reef ecosystem is among many problems that may be resolved using the coastal ocean observing system developed by various institutions. Traditional nutrient sampling has been inadequate to resolve issues on episodic nutrient fluxes in reef regions due spatial variability. This paper illustrates sampling strategy using COOS information to identify areas that need critical investigation. The area investigated the Puerto Rico subdomain. Nutrient ... |
|
| Wave Transformation Over Reefs: Evaluation of One-Dimensional Numerical Models |
Jan-2009 |
208 pages |
| Authors:
Zeki Demirbilek; Okey G Nwogu; Donald L Ward; Alejandro Sanchez; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| Three one-dimensional (1D) numerical wave models are evaluated for wave transformation over reefs and estimates of wave setup, runup, and ponding levels in an island setting where the beach is fronted by fringing reef and lagoons. The numerical models are based on different governing equations. BOUSS-1D and RBREAK2 are phase-resolving models that respectively solve the time-dependent Boussinesq and shallow water equations. WAV1D solves the 1D wave-averaged energy conservation equation. Laboratory ... |
|
| Gestural Communication With Accelerometer-Based Input Devices and Tactile Displays |
Dec-2008 |
8 pages |
| Authors:
Paul D Varcholik; James L Merlo; UNIVERSITY OF CENTRAL FLORIDA ORLANDO INST FOR SIMULATION AND TRAINING
|
| In this work, we introduce a communication system for common military hand and arm gestures which does not require a visual connection between the transmitter and receivers. Specifically, we present a computer mediated gesture recognition system that employs a wireless, accelerometer-based input device for collecting and classifying one- and two-hand and arm gestures. This system delivers message output through an audible channel and through a tactile display. The tactile display ... |
|
| A Metadata Calculus for Securing Information Flows |
Dec-2008 |
8 pages |
| Authors:
Mudhakar Srivatsa; Dakshi Agrawal; Shane Balfe; IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY
|
| Traditional approaches to information sharing use a highly conservative approach to deduce the metadata for an output object x derived from input objects y(sub 1), y(sub 2), ... , y(sub n) [e.g.: maximum over the security labels of all input objects]. Such approaches does not account for functions that explicitly down- grade the value of an object. Consequently, the security labels in traditional approaches tend to monotonically increase as newer ... |
|
| NORM: A Decentralized Location Verification Mechanism for Wireless Sensor Networks |
Dec-2008 |
8 pages |
| Authors:
Jie Yang; Yingying Chen; Xiuyuan Zheng; Venkataraman Swaminathan; STEVENS INST OF TECH HOBOKEN NJ DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| The location of wireless devices and sensor nodes is a critical input for many location-aware applications. Particularly, important tasks in tactical fields, such as monitoring the status of soldiers and tracking the equipment, all rely on the location information. However, adversaries may falsify the location information and undermine the activities supported by location. In this work, we propose NORM, a decentralized location verification mechanism for wireless sensor networks. To perform ... |
|
| Operation Iraqi Freedom: Actions Needed to Enhance DOD Planning for Reposturing of U.S. Forces from Iraq |
01-Sep-2008 |
86 pages |
| Authors:
William M Solis; Christopher Turner; Tristan T To; John J Marzullo; Gregory Marchand; Katherine Lenane; John Lee; Guy A Lofaro; David A Schmitt; Cheryl Weissman; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| While the pace and overall extent of reposturing in Iraq has yet to be determined, various defense commands began planning for reposturing in fall 2007, and in May 2008 DOD began coordinating these individual planning efforts to develop a logistical framework based on three key assumptions. According to DOD officials, initial planning efforts were uncoordinated because the three organizations undertaking them the Defense Logistics Agency (DLA), the Army Materiel Command(AMC), ... |
|
| Organizational Analysis of the United States Army Contracting Command-Kuwait |
01-Sep-2008 |
105 pages |
| Authors:
Kristine R Orr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This study of the U.S. Army Contracting Command - Kuwait (USACC-KU) used an organizational systems framework to analyze factors related to strategy structure, processes and results experienced at USACC-KU during 2006-2008. The researcher's experience at the command coupled with survey data from employees and mid and senior level managers was used to analyze the organization as a system. Conclusions and recommendations regarding the assessment include: 1) Key variables appeared to ... |
|
| Deposition of Selected Airborne Particles into a Microfluidic Flow Cytometer for Bioanalysis |
MAY 2008 |
22 pages |
| Authors:
Hermes Huang; Yong-Le Pan; Steven C. Hill; Richard K. Chang; ARMY RESEARCH LAB ADELPHI MD
|
| In a proof-of-concept experiment, we demonstrate how selected airborne bacteria, detected in air by light scattering, can be deflected aerodynamically into the input well of a microfluidic flow cytometer and analyzed using fluorescein-labeled antibodies. This experiment demonstrates a new method for introducing airborne samples into a microfluidic cell. The results suggest that by deflecting only those airborne particles having the fluorescence spectra of bioaerosols and by depositing the individual bioaerosols ... |
|
| On the Swerve Response of Projectiles to Control Input |
APR 2008 |
30 pages |
| Authors:
Douglas Ollerenshaw; Mark Costello; OREGON STATE UNIV CORVALLIS DEPT OF MECHANICAL ENGINEERING
|
| The swerve response of fin- and spin-stabilized projectiles to control mechanism input is sometimes not intuitive and often surprises smart weapon designers. This report seeks to explain the basic parameters that govern swerve of projectiles excited by control input. By modeling the overall effect of any control mechanism as a non-rolling reference frame force or moment applied to the projectile, we obtain general expressions for swerve in terms of basic ... |
|
| The Use of a Steering Shaping Function to Improve Human Performance in By-Wire Vehicles |
MAR 2008 |
34 pages |
| Authors:
Susan G. Hill; Jason S. Metcalfe; Kaleb McDowell; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE
|
| The U.S. Army is examining evolutionary concepts for the command and control of military vehicles. Currently, there is a performance issue regarding vehicle control at higher speeds for some indirect vision, by-wire tactical vehicles. By-wire vehicles are those in which mechanical links between the driver and control devices are replaced by electronic or computerized signals. Specifically, an operator's ability to maintain reliable control of by-wire military vehicles while driving appears ... |
|
| Communicating Optimized Decision Input from Stochastic Turbulence Forecasts |
MAR 2008 |
159 pages |
| Authors:
Jeanne R. Szczes; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The uncertainty of weather forecasts contributes to mission risk. Ensemble data can improve combat capability by incorporating forecast uncertainty into the warfighter decision process. The study transforms raw ensemble data into optimized decision inputs for upper level turbulence using ORM principles and decision science. It demonstrates the methodology and importance of incorporating ambiguity, the uncertainty in forecast uncertainty, into the decision making process using the Taijitu method to estimate ambiguity. ... |
|
| Ferroelectric Plasma Thruster |
29 FEB 2008 |
10 pages |
| Authors:
Scott D. Kovaleski; Mark A. Kemp; MISSOURI UNIV-COLUMBIA
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| The Ferroelectric Plasma Thruster (FEPT) has been developed as an electrostatic micropropulsion thruster for the smallest classes of spacecraft. The FEPT consists of a thin wafer of lithium niobate ferroelectric material, with a solid electrode on one side, and an electrode with an aperture on the other. When radiofrequency high voltage is applied between the electrodes, through the thickness of the crystal, a combination of triple point and piezoelectric effects ... |
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| User's Guide to STAT The SHADWELL Test Analysis Tool (Version 2.0) |
29 FEB 2008 |
34 pages |
| Authors:
John B. Hoover; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
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| The SHADWELL Test Analysis Tool, orginally developed to aid in the analysis of large-scale fire test data, has been updated. The new version removes the dependency on proprietary, third-party software and adds support for several new data input formats, including SHADWELL LabVIEW test data and the Fire and Smoke Simulator (FSSIM) fire model output. Methods are provided for definition of data channels, selection of data based on instrument type and ... |
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| A Chemoprevention Trial to Study the Effects of High Tea Consumption on Smoking-Related Oxidative Stress |
FEB 2008 |
10 pages |
| Authors:
Iman A. Hakim; ARIZONA UNIV TUCSON
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| Our overall goal is to develop a safe and feasible model for the chemoprevention of a wide range of tobacco-related diseases. Our immediate goal that is addressed over a 5-year study period is to determine the effects of high tea consumption on biological markers of oxidative stress that mediate lung cancer risk. We are conducting a 6-month randomized controlled double-blinded chemopreventive trial in a group of COPD subjects who are ... |
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