| Lithospheric Models of the Middle East to Improve Seismic Source Parameter Determination/Event Location Accuracy |
Sep 2012 |
10 pages |
| Authors:
Rengin Gok; Stephen Herzog; Keith Nakanishi; Michael E Pasyanos; Rob J Mellors; Arthur J Rodgers; David B Harris; Eileen S Vergino; LAWRENCE LIVERMORE NATIONAL LAB CA
|
 | The Middle East is a tectonically complex and seismically active region. The ability to accurately locate earthquakes and other seismic events in this region is complicated by tectonics, the uneven distribution of natural earthquakes and the fact that countries run separate national seismic networks without well-developed data-sharing agreements. We report here on a variety of scientific efforts to enhance knowledge of the lithospheric velocity structure in the Middle East, making ... |
|
| A Description of the Framework of the Atmospheric Boundary Layer Environment (ABLE) Model |
Sep 2012 |
32 pages |
| Authors:
Yansen Wang; Chatt Williamson; Benjamin MacCall; ARMY RESEARCH LAB ADELPHI MD
|
| This technical report documents the framework of a three-dimensional Atmospheric Boundary Layer Environment (ABLE) model. The objective of the project is to develop a microscale boundary layer meteorological model to fill the gap in Army applications. A set of incompressible equations for momentum, energy, and scalar is chosen specifically for the microscale meteorological modeling. A Cartesian coordinate with a structured grid is selected for a fast computation and domain preprocessing. ... |
|
| Stress Intensity Solutions for Corner and Through-the-Thickness Cracks at a U-Shaped Notch (Preprint) |
Sep 2012 |
19 pages |
| Authors:
James A Harter; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AEROSPACE SYSTEMS DIR
|
| Stress intensity factor solutions for corner and through cracks growing from a u-shaped edge notch are required to improve the accuracy of damage tolerance analyses for continuing damage scenarios. Closed-form K-solutions for through-the-thickness and corner cracks under remote axial loading were developed using 3-D finite element (FE) models for wide plates. Finite width corrections were determined based on FE models for a wide range of finite plate geometries. The finite ... |
|
| Attitude Estimation for Unresolved Agile Space Objects with Shape Model Uncertainty |
Sep 2012 |
11 pages |
| Authors:
Marcus J Holzinger; Kyle T Alfriend; Charles J Wetterer; K K Luu; Chris Sabol; Kris Hamada; Andrew Harms; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| The problem of estimating attitude for actively maneuvering or passively rotating Space Objects (SOs) with unknown mass properties / external torques and uncertain shape models is addressed. To account for agile SO maneuvers, angular rates are simply assumed to be random inputs (e.g., process noise), and model uncertainty is accounted for in a bias state with dynamics derived using rst principles. Bayesian estimation approaches are used to estimate the resulting ... |
|
| An Improved Design Methodology for Modeling Thick-Section Composite Structures Using a Multiscale Approach |
Sep 2012 |
112 pages |
| Authors:
Jeffrey M Staniszewski; Travis A Bogetti; Michael Keefe; Brian Powers; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Material nonlinearity and progressive ply failure are important considerations in the finite element modeling of thick-section composite structures. LAMPATNL uses a method to model the material nonlinearity and progressive ply failure of composite laminates using finite element software without explicitly simulating individual plies. Improvements to LAMPATNL are documented and discussed in this report. Also, LAMPATNL is validated against both the linear and nonlinear material point models. In this work, a ... |
|
| Understanding and Managing Propagation on Large Networks - Theory, Algorithms, and Models |
Sep 2012 |
233 pages |
| Authors:
B A Prakash; CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF COMPUTER SCIENCE
|
| How do contagions spread in population networks? What happens if the networks change with time? Which hospitals should we give vaccines to, for maximum effect? How to detect sources of rumors on Twitter/Facebook? These questions and many others such as which group should we market to, for maximizing product penetration, how quickly news travels in online media and how the relative frequencies of competing tasks evolve are all related to ... |
|
| Exploring the Dynamics and Modeling National Budget as a Supply Chain System: A Proposal for Reengineering the Budgeting Process and for Developing a Management Flight Simulator |
Sep 2012 |
138 pages |
| Authors:
Christoforos Kalloniatis; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| In the Science of Economics, there has been a debate about the optimal fiscal and budgetary policy that should be implemented by governments. On the one side, the advocates of the Keynesian Theory assert that in recession times governments should run budgets with deficits, in order to stimulate the economy, while the supporters of the Balanced Budget Theory, on the contrary, underscores the need to reduce and even eliminate the ... |
|
| Bio-Alpha off the West Coast |
Sep 2012 |
7 pages |
| Authors:
Orest Diachok; JOHNS HOPKINS UNIV ARLINGTON VA APPLIED PHYSICS LAB
|
| LONG-TERM GOALS: Develop quantitative models of the effects of fish with swim bladders on attenuation (bio-alpha), transmission loss, and scintillation index in the ocean. OBJECTIVES: Conduct an experiment off the west coast to determine the effects of hake and sardines, the dominant species of fish with swim bladders off the west coast of the USA, on attenuation (bio-alpha), transmission loss (TL) and scintillation index (SI). Determine the effects of gas ... |
|
| Observation-Consistent Input and Whitecapping Dissipation in a Model for Wind-Generated Surface Waves: Description and Simple Calculations |
Sep 2012 |
20 pages |
| Authors:
W E Rogers; Alexander V Babanin; David W Wang; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| A new wind-input and wind-breaking dissipation for phase-averaged spectral models of wind-generated surface waves is presented. Both are based on recent field observations in Lake George, New South Wales, Australia, at moderate-to-strong wind-wave conditions. The respective parameterizations are built on quantitative measurements and incorporate new observed physical features, which until very recently were missing in source terms employed in operational models. Two novel features of the wind-input source function are ... |
|
| Nanostructured Composite Materials for High Temperature Thermoelectric Energy Conversion |
29 Aug 2012 |
26 pages |
| Authors:
Charles J O'Connor; NEW ORLEANS UNIV LA
|
| The goals of this project were to synthesize, characterize and model bulk nanostructured composite materials for thermoelectric energy conversion applications. The objective was to produce materials which demonstrate an increase in intrinsic thermoelectric efficiency of a factor of two or more over existing commercially-available materials. |
|
| Human-Robot Interaction: Intention Recognition and Mutual Entrainment |
18 Aug 2012 |
66 pages |
| Authors:
Kazuhiro Kosuge; TOHOKU UNIV SENDAI (JAPAN)
|
| Waltz is a typical example of physical human-human interaction (pHHI) in a well-structured environment. Waltz involves two dancers. The goal is to reproduce the female dancer's abilities with a robot in pHRI. The project focused on the lower level interaction in pHRI, i.e., coupled dynamics, and proposed a framework which covers modeling, analysis, human state sensing and robot control in developing a cooperative female robot dancer. The two dancers' coupled ... |
|
| Model Validation for Simulations of Vehicle Systems |
16 Aug 2012 |
24 pages |
| Authors:
Hao Pan; Gregory Hulbert; Michael Kokkolaras; Matthew Castanier; David Lamb; FORD MOTOR CO DEARBORN MI
|
| Outline: Classification of validation approaches, Bayesian interval hypothesis testing, Quantifying model confidence, Distribution-free approach by means of bootstrapping, Statistical power superiority, Validation benchmark problem, ARC-developed electro-thermal battery model validation, for energy & power community of interest application. |
|
| Evaluating Voltage Regulation Compliance of MIL-PRF-GCS600A (Army) for Vehicle On-Board Generators and Assessing Overall Vehicle Bus Compliance |
16 Aug 2012 |
31 pages |
| Authors:
Wesley G Zanardelli; John Kelly; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
|
| SQTrust: Social and QoS Trust Management and Its Application to Mission-Oriented Mobile Groups |
15 Aug 2012 |
15 pages |
| Authors:
Ing-Ray Chen; Fenye Bao; Jin-Hee Cho; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG OFFICE OF SPONSORED PROGRAMS
|
| We propose to combine the notion of social trust derived from social networks with that of quality-of-service (QoS) trust derived from communication networks to obtain a composite trust metric as a basis for evaluating trust of mobile nodes in mobile ad hoc network (MANET) environments. We develop a novel model-based approach to identify the best protocol setting under which peer-to-peer subjective trust as a result of executing our distributed trust ... |
|
| Understanding and Addressing Cultural Variation in Costly Antisocial Punishment |
15 Aug 2012 |
35 pages |
| Authors:
Joanna J Bryson; Benedikt Herrmannz; BATH UNIV (UNITED KINGDOM) DEPT OF COMPUTER SCIENCE
|
| This report results from a contract tasking University of Bath as follows: The varieties of human cultures are a rich treasure, valued for their wealth of knowledge as well as their aesthetics. However, some aspects of cultural variation result in measurable metric differences in indices with apparently universal ethical value, for example infant mortality or literacy rates. We seek here to understand the cultural traits that lead members of some ... |
|
| Arctic Collaborative Environment (ACE) |
01 Aug 2012 |
20 pages |
| Authors:
OFFICE OF THE DIRECTOR OF DEFENSE RESEARCH AND ENGINEERING WASHINGTON DC RAPID FIELDING DIRECTORATE
|
| The ACE JCTD will provide a web-based, open-access, Arctic-focused, environmental research and decision-support system that integrates data from existing remote sensing assets and in situ observations to provide monitoring, analysis, and visualization based on earth observation data and modeling. The ACE JCTD will enable local, regional, and international cooperation and coordination on long-term environmental planning and near-term actions in response to climatic and environmental changes occurring in the Arctic Region. ... |
|
| Comparison between a Terramechanics Model and a Continuum Soil Model Implemented within the Absolute Nodal Coordinate Formulation |
Aug 2012 |
10 pages |
| Authors:
Michael D Letherwood; Paramsothy Jayakumar; Guangbu Li; Ulysses Contreras; Craig D Foster; Ahmed A Shabana; ILLINOIS UNIV AT CHICAGO DEPT OF CIVIL AND MATERIALS ENGINEERING
|
| In order to determine the best approach for the modeling of tracked vehicle-terrain interactions, a comparison is made between terramechanics and continuum mechanics plasticity soil models that can be used in vehicle dynamic simulations. The absolute nodal coordinate formulation (ANCF) which can be used in multibody system (MBS) dynamics to model large rotations and large deformations will provide a novel framework for this comparison. First, a brief review of the ... |
|
| Development of iFab (Instant Foundry Adaptive Through Bits) Manufacturing Process and Machine Library |
Aug 2012 |
202 pages |
| Authors:
Shreyes N Melkote; GEORGIA INST OF TECH ATLANTA
|
| This report summarizes work performed under AFRL Contract Number FA8650-11-C-7142 for the development of an iFAB process and machine capability library. Specifically, the report is in draft form and addresses three major task areas relevant to the proposed effort. The main objective of this research is to create and validate adaptable software libraries of manufacturing processes, machines, tooling and fixtures, and other operations pertinent to the fabrication of electro-mechanical components ... |
|
| Model Validation for Simulations of Vehicle Systems |
Aug 2012 |
15 pages |
| Authors:
David Lamb; Matthew Castanier; Hao Pan; Michael Kokkolaras; Gregory Hulbert; MICHIGAN UNIV ANN ARBOR DEPT OF MECHANICAL ENGINEERING
|
| This paper deals with model validation of dynamic systems (with vehicle systems being of particular interest) that have multiple time-dependent output. First, we review several validation methodologies that have been reported in the literature: graphical comparison, feature-based techniques, PDF/CDF based techniques, Bayesian posterior estimation, classical hypothesis testing and Bayesian hypothesis testing. We discuss their advantages and disadvantages in terms of several attributes: applicability to different types of models, need for ... |
|
| An Experimental Investigation to Improve Lead Acid Battery Recharging Algoriths for Environmental Performance |
Aug 2012 |
9 pages |
| Authors:
Yi Ding; Sonya Zanardelli; Stanley Jones; John Mendoza; Daniel Wang; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| An experimental testing program has been developed that looks to optimize the battery recharging algorithms to improve battery lifetime and state of charge knowledge. The first phase of the testing targeted lead acid battery performance characterization as a function of controlled environmental temperatures. Subsequent testing includes performance testing under alternator recharging using default and proposed charging algorithms. A new experimental apparatus has been developed to integrate battery testing with alternator ... |
|
| Linear Algebraic Modeling of Power Flow in the HMP500-3 Transmission |
Aug 2012 |
11 pages |
| Authors:
Matthew G McGough; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The HMPT500-3 is a split torque path hydrostatic / mechanical continuously variable transmission used in the Bradley Fighting Vehicle. Power transmission and steering is accomplished through the interaction of six planetary gear sets and two variable displacement hydrostatic pump / motor units (HSUs). Power flow in the HMPT500-3 is extremely complex, with numerous feedback paths within the planetary gear train. Without a clearly defined power flow path from gear set ... |
|
| Effect of Heat on Wounded Warriors in Ground Combat Vehicles: Insights from the Army Medical Community, and the Simulation of a Novel Method for Soldier Thermal Control |
Aug 2012 |
9 pages |
| Authors:
Nathan Tison; Robert E Smith; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| Ground combat vehicles can operate in regions characterized by various types and severities of injuries ? resulting from improvised explosive devices (IEDs), gunfire or heat illness ? as well as extreme climates such as desert environments. Because of the wounded warrior's compromised physical condition, their thermal surroundings within the vehicle is especially important. This paper presents insights gleaned from the Army medical community, as well as a simple study of ... |
|
| Investigating the Mobility of Light Autonomous Tracked Vehicles using a High Performance Computing Simulation Capability |
Aug 2012 |
22 pages |
| Authors:
Dan Negrut; Hammad Mazhar; Daniel Melanz; David Lamb; Paramsothy Jayakumar; Michael Letherwood; Abhinandan Jain; Marco Quadrelli; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| This paper is concerned with the physics-based simulation of light tracked vehicles operating on rough deformable terrain. The focus is on small autonomous vehicles, which weigh less than 100 lb and move on deformable and rough terrain that is feature rich and no longer representable using a continuum approach. A scenario of interest is, for instance, the simulation of a reconnaissance mission for a high mobility lightweight robot where objects ... |
|
| Process Performance: Words of Wisdom |
Aug 2012 |
5 pages |
| Authors:
Dale Childs; Paul Kimmerly; MARINE CORPS TECHNOLOGY SERVICES ORGANIZATION KANSAS CITY MO
|
| Process performance forms the cornerstone of the high-maturity concepts in the CMMI(registered trademark). High maturity generates great discussion in the CMMI-based process improvement world. However, understanding process performance provides benefits to an organization whether or not it adopts the CMMI. The CMMI provides a framework for an organization's process improvement efforts. At its highest levels, the CMMI describes how an organization can use process performance measures to understand and improve ... |
|
| Linear Algebraic Modeling of Power Flow in the HMP500-3 Transmission |
Aug 2012 |
17 pages |
| Authors:
Matthew G McGough; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| These charts use linear algebra to describe the transmission of a tracked vehicle. |
|
| Suspension Parameter Measurements of Wheeled Military Vehicles |
Aug 2012 |
10 pages |
| Authors:
Aleksander Kurec; Amandeep Singh; Igor Baseski; Thomas Skorupa; Dale Andreatta; Gary Heydinger; Anmol Sidhu; Ronald Bixel; SEA LTD COLUMBUS OH
|
| At the request of the US Army's Tank Automotive Command (TACOM) a device was built to measure the suspension parameters of any military wheeled vehicle. This is part of an ongoing effort to model and predict vehicle dynamic behavior. The new machine is called the Suspension Parameter Identification and Evaluation Rig (SPIdER) and has a capacity intended to cover all of the military's wheeled vehicles. The machine operates by holding ... |
|
| Probabilistic Framework for Prediction of Material Property Distributions from Small Microstructural Models (Preprint) |
Aug 2012 |
18 pages |
| Authors:
Patrick Golden; Reji John; Daniel M Sparkman; Jr Millwater Harry R; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH STRUCTURAL MATERIALS DIV
|
| A probabilistic framework for prediction of material property distributions from small scale (i.e. 2-grain) models is proposed. Monte Carlo Simulation and kernel density estimation are used to estimate the material property distribution of a grain boundary with a 2-grain model. Extreme value and order statistics are then employed to estimate the distribution of larger microstructure models. An example of the methodology is presented for identifying the applied uniaxial stress at ... |
|
| Mining and Modeling Real-world Networks: Patterns, Anomalies, and Tools |
Aug 2012 |
244 pages |
| Authors:
Leman Akoglu; CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF COMPUTER SCIENCE
|
| Large real-world graph (a.k.a network, relational) data are omnipresent, in online media, businesses, science, and the government. Analysis of these massive graphs is crucial, in order to extract descriptive and predictive knowledge with many commercial medical, and environmental applications. In addition to its general structure knowing what stands out, i.e. anomalous or novel, in the data is often at least, or even more important and interesting. In this thesis, we ... |
|
| Common Object Library Description |
Aug 2012 |
46 pages |
| Authors:
Kristine K Fallon; Mark Johnson; KRISTINE FALLON ASSOCIATES INC CHICAGO IL
|
| For Building Information Modeling (BIM) technology to be successful, it must be consistently applied across many projects, by many teams. The National Building Information Model Standard United States (NBIMS-US) has begun to deliver standards that allow teams to consistently deliver open-standard building information. The contents of this standard describe the format and quality of information to be delivered. Software configuration guides and object templates can assist users of BIM technology ... |
|
| Application of TREECS (trademark) to Strontium 90 for Borschi Watershed near Chernobyl, Ukraine |
Aug 2012 |
8 pages |
| Authors:
Mark S Dortch; ARMY CORPS OF ENGINEERS VICKSBURG MS ENGINEER RESEARCH AND DEVELOPMENT CENTER
|
| The Training Range Environmental Evaluation and Characterization System (TREECS ) (http://el.erdc.usace.army.mil/treecs/) is being developed by the U.S. Army Engineer Research and Development Center (ERDC) for the Army. TREECS will have varying levels of capability to forecast the fate of munitions constituents (MC) (such as high explosives (HE) and metals) found on firing/training ranges, as well as those subsequently transported to surface water and groundwater. The overall purpose of TREECS is ... |
|
| The Identification of Military Installations as Important Migratory Bird Stopover Sites and the Development of Bird Migration Forecast Models: A Radar Ornithology Approach |
Aug 2012 |
|
| Authors:
Richard A Fischer; Michael P Guilfoyle; Jonathon Valente; Jr Gauthreaux Sidney A; Carroll G Belser; John W Blaricom Donald V; Emily Cohen; Frank R Moore; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
 | Military lands and waters may be particularly valuable for migrating birds requiring stopover habitat to rest and refuel en route to very distant seasonal ranges. Recent developments in radar technology have provided powerful tools for investigating on a broad scale migrant use of military installations; thus providing an opportunity to improve both conservation and flight safety measures. In this study, spring and fall migrant use of 40 military installations across ... |
|
| The Role of Metaphors in Fostering Macrocognitive Processes in Distributed Teams |
30 Jul 2012 |
52 pages |
| Authors:
Susan Mohammed; Michael McNeese; Vincent Mancuso; Katherine Hamilton; Rachel Tesler; PENNSYLVANIA STATE UNIV STATE COLLEGE OFFICE OF SPONSORED PROGRAMS
|
| This grant project integrated research on team cognition, temporal dynamics, and storytelling towards the goal of improving team coordination and performance in distributed decision making teams. Specifically, the three overall research objectives were: 1) To integrate and empirically investigate information sharing, team mental models, and situational awareness to understand their differential effects on team outcomes 2) to infuse a temporal focus into the study of team cognition and team outcomes ... |
|
| The MRAP Boondoggle |
26 Jul 2012 |
5 pages |
| Authors:
Chris Rohlfs; Ryan Sullivan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Last summer, Secretary of Defense Robert Gates said [1] that the Pentagon's Joint Program Office for Mine-Resistant Ambush Protected Vehicles (JPO-MRAP), a $45 billion program to design, manufacture, and deploy 27,000 heavily protected vehicles into Iraq and Afghanistan, had saved thousands and thousands of lives. The Joint Program Office drilled down a more specific figure: MRAPs, as they're known in military jargon, saved the lives of 40,000 troops in Iraq ... |
|
| Continuous Graph Partitioning for Camera Network Surveillance |
23 Jul 2012 |
17 pages |
| Authors:
D Borra; F Pasqualetti; F Bullo; CALIFORNIA UNIV SANTA BARBARA CENTER FOR CONTROL, DYNAMICAL SYSTEMS AND COMPUTATION (CCDC)
|
| In this work we design surveillance trajectories for a network of autonomous cameras to detect intruders in an environment. Intruders, which appear at arbitrary times and locations, are classified as static or dynamic. While static intruders remain stationary, dynamic intruders are aware of the cameras configuration and move to avoid detection, if possible. As performance criteria we consider the worst-case detection time of static and dynamic intruders. We model the ... |
|
| Human Neural Cell-Based Biosensor |
05 Jul 2012 |
4 pages |
| Authors:
Steven L Stice; Jamie Chilton; ARUNA BIOMEDICAL INC ATHENS GA
|
| The purpose of this project is to develop in vitro, cell based biosensors for environmental toxins. By using ArunA s neural cell lines derived from both human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs), our goal is to provide a human neural cell based biosensor that is a more biologically relevant model of human physiology. This report focused on the differentiation of hESC- and hiPSC-derived neural ... |
|
| Instant Foundry Adaptive through Bits (iFAB) |
Jul 2012 |
74 pages |
| Authors:
Tolga Kurtoglu; Matthew Campbell; Joseph Rasche; Jami Shah; Yorgos Stilyanos; PALO ALTO RESEARCH CENTER INC CA
|
| The goal of this project is to incorporate manufacturability constraints early into the system design process to enable design trade space exploration which we believe will shorten schedules, decrease manufacturing costs, increase reliability and enable reconfiguration and reuse capability within design and manufacturing processes. Our long-term vision is to embed the proposed intelligent design and manufacturing framework into existing product lifecycle management software technologies so that corporations can dramatically improve ... |
|
| Analysis and Modeling of Small Crack Detection in Pressurized Fuselages for Structural Health Monitoring Applications (Preprint) |
Jul 2012 |
14 pages |
| Authors:
J L Blackshire; F Ospina; S R Soni; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| This effort explores the evolution and characterization of structural cracks in aircraft fuselage structures in which the loads are varying. During flight, an aircraft fuselage skin and structure are subjected to varied cyclic loads, which can cause embedded cracks and other damage features to change their characteristics due to loading effects. The current research uses finite element modeling and experimental techniques to characterize the behavior of cracks under different static ... |
|
| Improving Domain-specific Machine Translation by Constraining the Language Model |
Jul 2012 |
18 pages |
| Authors:
Jeffrey C Micher; ARMY RESEARCH LAB ADELPHI MD COMPUTATIONAL AND INFORMATION SCIENCES DIRECTORATE
|
| A domain-specific statistical machine translation engine is shown to be more accurate when only domain-specific language data are used to build the target-language language model. This has been found to be true when compared to using a much larger, out-of-domain corpus for building the language model, either alone or in combination with the domain-specific data. |
|
| Conceptual Modeling (CM) for Military Modeling and Simulation (M&S) (Modelisation conceptuelle (MC) pour la modelisation et la simulation (M&S) militaires) |
Jul 2012 |
334 pages |
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| The objectives of the Task Group (MSG-058) include: 1) Clarify the Conceptual Model concepts, discuss the terminology, and emphasize the utility to better formalize conceptual models; 2) Investigate methodologies, simulation and software engineering processes, initiatives and technologies useful for the establishment of conceptual models; 3) Identify the relevant stakeholders of conceptual models; 4) Address the needs of M&S community, identifying the way conceptual models may contribute to M&S development, and ... |
|
| Development of Novel Data Processing Schemes and Global Seismic Event Database and Special Studies to Support the Explosions Monitoring Research Program |
28 Jun 2012 |
42 pages |
| Authors:
Patricia Doherty; Jessie Bonner; Delaine Reiter; Estela Minaya; Mario Zabala; Maracia Antelo; BOSTON COLL CHESTNUT HILL MA INST FOR SCIENTIFIC RESEARCH
|
| The Boston College Institute for Scientific Research (ISR) has conducted innovative research using tools, analysis techniques, and database development to support the Air Force Research Laboratory s (AFRL) nuclear monitoring program. The innovative research objectives of this task have been directed toward applying waveform modeling techniques to earthquakes and explosions at locations of interest to the community where both teleseismic and regional waveform data are available. Moderate to large earthquake ... |
|
| Securing the Next Ripple in Information Security: The Defense Industrial Base (DIB) |
14 Jun 2012 |
105 pages |
| Authors:
Justin W Swartzmiller; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| America's one-time technological advantage is gone; much of its intellectual property secrets have been stolen. For sometime, our adversaries have been attacking the Department of Defense's (DoD) networks to obtain any sensitive information. Recently, attackers have expanded their attacking efforts, to include the Defense Industrial Base (DIB), due to DoD's increased network defenses. This research paper will answer the core issue of how to secure sensitive information within the DIB ... |
|
| Design of a Free-running, 1/30th Froude Scaled Model Destroyer for In-situ Hydrodynamic Flow Visualization |
01 Jun 2012 |
77 pages |
| Authors:
David M Cope; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| Hydrodynamic flow visualization techniques of scaled hull forms and propellers are typically limited to isolating certain operating conditions in a tow tank, circulation tunnel, or large maneuvering basin. Although cost effective, these tests provide a limited perspective on the interactions of the entire system. Full-scale testing, other the other hand, provides real world data but is costly. In between, a Froude scaled, free-running model of an existing hull form controls ... |
|
| Computational Conceptual Change: An Explanation-Based Approach |
Jun 2012 |
304 pages |
| Authors:
Scott E Friedman; NORTHWESTERN UNIV EVANSTON IL
|
| The process of conceptual change - whereby new knowledge is adopted in the presence of prior conflicting knowledge - is pervasive in human cognitive development, and contributes to our cognitive flexibility. At present, Artificial Intelligence systems lack the flexibility of human conceptual change. This is due in part to challenges in knowledge representation, belief revision abduction, and induction. In addition, there are disagreements in the cognitive science community regarding how ... |
|
| Bathymetric Control of Front Generation in a Tidal River |
Jun 2012 |
10 pages |
| Authors:
Paul McKay; Cheryl A Blain; Richard Mied; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| A persistent tidal front is observed on ebb tide in the vicinity of the Nanjemoy Creek diversion on the Potomac River in Maryland. This front forms along the boundary between the creek water mass and the main river water ma ss and is evidence of low lateral mixing in the area of the front. An accurate numerical model of the river-creek geometry is able to reproduce this feature using realistic ... |
|
| An Interpolation Approach to Optimal Trajectory Planning for Helicopter Unmanned Aerial Vehicles |
Jun 2012 |
65 pages |
| Authors:
Jerrod C Adams; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis explores numerical methods to provide real-time control inputs to achieve an optimal trajectory which minimizes the time required for a Helicopter Unmanned Aerial Vehicle (HUAV) to reorient to a given target. A library of optimal trajectories is populated using a pseudospectral computational algorithm applied to the mathematical model developed by the National University of Singapore and Singapore Department of Defense to simulate flight characteristics for their HeLion small ... |
|
| Blind Cyclostationary Feature Detection Based Spectrum Sensing for Autonomous Self-Learning Cognitive Radios |
Jun 2012 |
6 pages |
| Authors:
Mario Bkassiny; Sudharman K Jayaweera; Yang Li; Keith A Avery; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
|
| In this paper, we present an autonomous cognitive radio (CR) architecture that incorporates the main features of cognition. This model, referred to as the Radiobot, is capable of self-learning and self-reconfiguration to match its RF environment. The proposed CR architecture assumes a joint blind energy and cyclostationary detection methods to classify the communication systems in its vicinity, without any prior knowledge of the sensed signals. We derive the receiver operating ... |
|
| Designing a Qualitative Data Collection Strategy (QDCS) for Africa - Phase 1: A Gap Analysis of Existing Models, Simulations, and Tools Relating to Africa |
Jun 2012 |
48 pages |
| Authors:
Ashley N Bybee; Dominick E Wright; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA
|
| This document summarizes the findings of the IDA's survey of models, simulations, and relevant tools currently being used to analyze the African continent. It identifies the most pressing gaps in data and captures the most significant challenges or obstacles to effective data collection. This phase of research supports the final objective, which is to draft a Qualitative Data Collection Strategy (QDCS) that addresses gaps where insufficient qualitative data exist for ... |
|
| Modeling the 2008 Manning Study for the 618th Tanker Airlift Control Center (TACC) |
Jun 2012 |
31 pages |
| Authors:
Nathan R Purtle; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| In October of 2008, a Capability-Based Manpower Standard report was released for the 618th Tanker Airlift Control Center (TACC). This report describes each task and its applicable man-hours for every department in the TACC. Depending on how many missions are planned and the number of missions that are actually executed, this gives each department an idea of how many man-hours (people) it needs to accomplish its mission. Using the 2008 ... |
|
| Cornerstone: Foundational Models and Services for Integrated Battle Planning |
Jun 2012 |
33 pages |
| Authors:
Nicholas J Pioch; Jr Farrell Robert J; III Sexton William A; David Lebling; Daniel Hunter; Fotis Barlos; AIR FORCE RESEARCH LAB ROME NY
|
| The Air Force has three mission elements, air, space and cyber that it must command and control as a Joint and Coalition partner. Today's Air Operations Centers (AOCs) want to improve multi-domain collaboration. To address these challenges, Air Force Research Laboratory Information Directorate (AFRL/RI) is sponsoring exploration and development of an Integrated Battle Planning Capability (IBPC) to coordinate and synchronize planning across the three domains. As a first step toward ... |
|
| Cornerstone: Foundational Models and Services for Integrated Battle Planning |
Jun 2012 |
33 pages |
| Authors:
Nicholas J Pioch; Jr Farrell Robert J; III Sexton William A; David Lebling; Daniel Hunter; Fotis Barlos; AIR FORCE RESEARCH LAB ROME NY
|
| The Air Force has three mission elements, air, space and cyber that it must command and control as a Joint and Coalition partner. Today's Air Operations Centers (AOCs) want to improve multi-domain collaboration. To address these challenges, Air Force Research Laboratory Information Directorate (AFRL/RI) is sponsoring exploration and development of an Integrated Battle Planning Capability (IBPC) to coordinate and synchronize planning across the three domains. As a first step toward ... |
|
Reports by Keyword(s)
MODELS
