| Heuristic Rational Models In Social Networks |
Oct 2011 |
7 pages |
| Authors:
Ceyhun Eksin; Alejandro Ribeiro; PENNSYLVANIA UNIV PHILADELPHIA DEPT OF ELECTRICAL AND SYSTEMS ENGINEERING
|
 | A network of distributed agents wants to minimize a global cost given by a sum of local terms involving nonlinear functions of self and neighboring variables. Agents update their variables at random times by observing the values of neighboring agents and applying a random heuristic rule intent on minimizing the local cost with respect to their own variables. The heuristic rules are rational in that their average result is the ... |
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| Virtual Reality and Cellular Phones as a Complementary Intervention for Veterans with PTSD and Substance Use Disorders |
Oct 2011 |
8 pages |
| Authors:
Mark Z Rosenthal; DUKE UNIV DURHAM NC
|
| In the present project, we are testing a novel adjunctive intervention designed to complement exposure-based therapies for combat veterans with posttraumatic stress disorder (PTSD) and co-morbid substance use disorders (SUDs). The novel intervention uses virtual reality as a cue exposure platform to extinguish cravings to drug-related cues, and cellular phones as an extinction reminder platform to transfer learning effects from exposure/extinction in the clinic to adaptive responses in high-risk contexts ... |
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| Self-Stabilizing and Efficient Robust Uncertainty Management |
Oct 2011 |
50 pages |
| Authors:
Michael B Segal; Ohad Ben-Shahar; Shlomi Dolev; BEN-GURION UNIV OF THE NEGEV BEERSHEBA (ISRAEL)
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| This report results from a contract tasking Ben Gurion University as follows: During the course of this research project we have examined various models of communication and UAVs coordination including simulating birds flocking behavior. We considered the situation when the members of the swarm may discover each other by exchanging messages; periodically collecting information concerning the position, speed and direction of other members. Next, we considered the situation where the ... |
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| Tech Data, Please |
Oct 2011 |
4 pages |
| Authors:
David L Gallop; DEFENSE ACQUISITION UNIV FT BELVOIR VA
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| The operations and sustainment (O&S) phase costs for a weapon system often exceed 50 percent of the system's life cycle cost. This makes O&S costs a prime target for affordability initiatives. By introducing competition into the procurement of logistics support, spares, and upgrades to systems, experts believe we can achieve a 15 percent cost reduction, compared with a sole-source procurement of the same products and services. For example, the Army ... |
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| SOLVCON: An Unstructured PDE Framework |
Oct 2011 |
20 pages |
| Authors:
Yung-Yu Chen; David Bilyeu; OHIO STATE UNIV COLUMBUS DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| This presentation discusses the construction of the new software framework that supports, pluggable multi-physics, hybrid parallelism for HPC, and productive work flows, to deliver analyzed results by using high-fidelity solutions of hyperbolic conservation laws. The new software framework is called SOLVer CONstructor, i.e., SOLVCON; it is a platform to construct PDE-solving codes. |
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| Acoustic Metadata Management and Transparent Access to Networked Oceanographic Data Sets |
30 Sep 2011 |
9 pages |
| Authors:
Marie A Roch; Simone Baumann-Pickering; Catherine L Berchok; John A Hildebrand; Erin M Oleson; Sofie M Van Parijs; SAN DIEGO STATE UNIV CA DEPT OF COMPUTER SCIENCES
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| The long-term goals of this effort are to produce software capable of organizing and archiving metadata associated with the detection of marine mammals. The focus is on acoustic detections, but other modalities of detection as well as measurements such as conductivity, temperature, and depth (CTD) casts are included. In addition, the software provides interfaces to access oceanographic measurements from other data repositories in a transparent manner. Data shall be accessible ... |
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| Numerical Investigation of Nonlinear Internal Wave Generation and Breaking in Straits |
30 Sep 2011 |
9 pages |
| Authors:
Sonya Legg; PRINCETON UNIV NJ
|
| The long-term goal of this research is to develop a physical understanding of the processes that lead to mixing in the ocean with the aim of using this understanding to develop parameterizations of mixing suitable for global and regional models. Of particular focus are the mixing induced by tidal flow over topography and the mixing induced by breaking nonlinear internal waves. The primary scientific objective of this study is to ... |
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| Development of a Highly Efficient and Accurate Wind-Wave Simulation Framework for Operational Data Assimilation |
30 Sep 2011 |
9 pages |
| Authors:
Lian Shen; JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF CIVIL ENGINEERING
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| This research aims at developing a highly efficient yet accurate computational framework for the simulation and prediction of wave and wind coupled motions with wave phases being resolved, which will lead to an advanced data assimilation tool to provide more comprehensive environmental input for naval applications. Our ultimate goal is to pave the way for developing an operational tool for the Navy to use for ocean-wave-atmosphere battlespace sensing and prediction ... |
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| Large-Eddy Simulations of Baroclinic Instability and Turbulent Mixing |
30 Sep 2011 |
7 pages |
| Authors:
Eric D Skyllingstad; Roger M Samelson; OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
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| The long-term goal of this project is to improve our ability to understand, model, and predict lateral mixing and the associated submesoscale physical structure and processes in the upper and interior ocean. The main objective of this project is to examine the interaction between baroclinic, mesoscale eddies and turbulence using a large-eddy simulation (LES) model. Cases will focus on strong, baroclinic waves that form in the mixed layer along surface ... |
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| Turbulent Flow and Large Surface Wave Events in the Marine Boundary Layers |
30 Sep 2011 |
10 pages |
| Authors:
Peter P Sullivan; James C McWilliams; NATIONAL CENTER FOR ATMOSPHERIC RESEARCH BOULDER CO
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| The long-term objective of our research for the High Resolution Air-Sea Interaction (HIRES) Departmental Research Initiative (DRI) is to identify the couplings between large wave events, winds, and currents in the surface layer of the marine boundary layers. Turbulence-resolving large-eddy simulations (LESs) and direct numerical simulations (DNSs) of the marine atmospheric boundary layer (MABL) in the presence of time and space varying wave fields will be the main tools used ... |
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| High Wind Upper Ocean Mixing with Explicit Surface Wave Processes |
30 Sep 2011 |
13 pages |
| Authors:
Peter P Sullivan; James C McWilliams; NATIONAL CENTER FOR ATMOSPHERIC RESEARCH BOULDER CO
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| The work described here supports the Office of Naval Research Departmental Research Initiative (DRI) on the Impact of Typhoons on the Ocean in the Pacific (ITOP). One of central themes of the DRI is to better characterize and predict the ocean boundary layer (OBL) and its impact on typhoon (hurricane) evolution. This is one component of developing improved prediction models for the coupled atmosphere-ocean-wave system. Cooling of the sea surface ... |
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| Simulation of Extreme Arctic Cyclones in IPCC AR5 Experiments |
30 Sep 2011 |
5 pages |
| Authors:
Stephen Vavrus; WISCONSIN UNIV-MADISON CENTER FOR CLIMATIC RESEARCH
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| The primary goals of this project are to assess the ability of the current generation of global climate models (GCMs) to simulate extreme Arctic cyclones, and to identify changes in the characteristics of these storms caused by greenhouse-forced climate change to the present. These goals are being addressed through the following questions. First, how realistically does the widely used CCSM4 GCM simulate the observed characteristics of extreme Arctic cyclones, and ... |
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| Estimation of Salt and Fresh Water Transports in the Bay of Bengal |
30 Sep 2011 |
3 pages |
| Authors:
Subrahmanyam Bulusu; SOUTH CAROLINA UNIV COLUMBIA
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| The importance of Indian Ocean circulation dynamics to regional and global weather is increasingly recognized due to improved ocean observations in the last few decades. Observational and modeling efforts are directed towards understanding the impact of intraseasonal variability and interannual variability on monsoon variability. A key component to better understanding these interactions is understanding salt transport within a dynamic freshwater flux environment. Freshwater influx leads to intense salinity stratification in ... |
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| Near-Bottom Turbulence and Sediment Resuspension Induced by Nonlinear Internal Waves |
30 Sep 2011 |
9 pages |
| Authors:
Peter J Diamessis; Gustaaf B Jacobs; CORNELL UNIV ITHACA NY SCHOOL OF CIVIL ENGINEERING
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| The long-term goal of this work is to develop a fundamental understanding of the underlying physics of the interaction of nonlinear internal waves (NLIWs) with the continental shelf seafloor over a broad range of environmental conditions. We are particularly interested in how such interactions impact underwater optics and acoustics and shelf energetics and ecology by simulating enhanced bottom boundary layer (BBL) turbulence and particulate resuspension leading to benthic nepheloid layer ... |
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| Impact of Typhoons on the Western Pacific Ocean DRI: Numerical Modeling of Ocean Mixed Layer Turbulence and Entrainment at High Winds |
30 Sep 2011 |
6 pages |
| Authors:
Ramsey R Harcourt; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| This ongoing collaborative effort aims at measuring and modeling the response of the upper ocean to strong typhoons both in simple, open ocean conditions and in the more complex conditions caused by ocean eddies and preconditioning by prior storms. The measurement and modeling activities include a focus on the impact of surface waves; air-sea fluxes; and the temperature, salinity, and velocity structure of the upper ocean. The goals of this ... |
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| Flexible Radiation Codes for Numerical Weather Prediction Across Space and Time Scales |
30 Sep 2011 |
3 pages |
| Authors:
Robert Pincus; COLORADO UNIV AT BOULDER
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| Our long-term goal is to develop radiation parameterizations for dynamical models that are computationally efficient and work seamlessly across models at all time and space scales, especially from regional models to global models. The objective of this project is to build radiation codes for use in the Navy's limited area model (COAMPS) and global model (NOGAPS/NAVGEM). The codes will be scale-aware, computationally efficient across a range of computer architectures, and ... |
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| Numerical Techniques and Cloud-Scale Processes for High-Resolution Models |
30 Sep 2011 |
8 pages |
| Authors:
James D Doyle; NAVAL RESEARCH LAB MONTEREY CA
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| The long-term goal of this project is to improve the existing U.S. Navy mesoscale atmospheric forecast model, the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS (trademark)), and maintain it at the leading edge of Numerical Weather Prediction (NWP) models, while at the same time continue developing the next-generation model. In the near future, a change of paradigm to a unified approach in NWP will necessitate a novel approach in modeling. The ... |
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| Analysis and High-Resolution Modeling of Tropical Cyclogenesis during the TCS-08 and TPARC Field Campaign |
30 Sep 2011 |
8 pages |
| Authors:
Tim Li; Melinda S Peng; HAWAII UNIV HONOLULU (MANOA CAMPUS) SCHOOL OF OCEAN AND EARTH SCIENCE AND TECHNOLOGY
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| The accurate prediction of tropical cyclone (TC) genesis, structure, and intensity changes is critical to Navy missions and civilian activities in coastal areas. Significant gains have been made in TC track prediction over the past decades. However, genesis and intensity forecasts have shown very little progress during the same time period. A primary contributing factor to our lack of skill in the prediction of TC genesis and intensity is our ... |
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| Initialization of Tropical Cyclone Structure for Operational Application |
30 Sep 2011 |
5 pages |
| Authors:
Tim Li; Melinda S Peng; HAWAII UNIV HONOLULU (MANOA CAMPUS) SCHOOL OF OCEAN AND EARTH SCIENCE AND TECHNOLOGY
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| The long-term goal of this project is to improve the prediction of tropical cyclone (TC) genesis, structure, and intensity changes through improved representation of 3-dimensional TC structure in operational weather forecast models. The accurate prediction of TC genesis, structure, and intensity changes is critical to Navy missions and civilian activities in coastal areas. Significant gains have been made in TC track prediction over the past decades. However, genesis and intensity ... |
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| The Properties of Convective Clouds Over the Western Pacific and Their Relationship to the Environment of Tropical Cyclones |
30 Sep 2011 |
6 pages |
| Authors:
Zhaoxia Pu; Carolyn Reynolds; Allen Zhao; UTAH UNIV SALT LAKE CITY DEPT OF ATMOSPHERIC SCIENCES
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| The long-term goal of this research is to advance our understanding of the relationship between large-scale and mesoscale environmental conditions and small but powerful convective events during tropical cyclone (TC) development and intensity changes. Our ultimate goal is to identify the necessary conditions that determine the formation and evolution of a TC. Using data obtained during ONR's Tropical Cyclone Structure-2008 (TCS-08) program in the western Pacific region, we investigated large-scale ... |
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| Implementation of the Automated Numerical Model Performance Metrics System |
26 Sep 2011 |
31 pages |
| Authors:
James D Dykes; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Known as AutoMetrics, this set of software modules was developed to provide model-observation and model-model comparison matchups and statistics to help modellers and forecasters assess the performance of ocean circulation models, primarily the Navy Coastal Ocean Model (NCOM) and the Hybrid Coordinate Ocean Model (HYCOM). This system is fully automatic and gives users much flexibility in what model runs to be evaluated by this system, in real-time operations or for ... |
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| Shadow: Running Tor in a Box for Accurate and Efficient Experimentation |
23 Sep 2011 |
23 pages |
| Authors:
Rob Jansen; Nicholas Hooper; MINNESOTA UNIV MINNEAPOLIS DEPT OF COMPUTER SCIENCE AND ENGINEERING
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| Tor is a large and popular overlay network providing both anonymity to its users and a platform for anonymous communication research. New design proposals and attacks on the system are challenging to test in the live network because of deployment issues and the risk of invading users privacy, while alternative Tor experimentation techniques are limited in scale, are inaccurate, or create results that are difficult to reproduce or verify. We ... |
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| Development of a Flow Solver with Complex Kinetics on the Graphic Processing Units |
22 Sep 2011 |
21 pages |
| Authors:
Hai P Le; Jean-Luc Cambier; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIR/SPACE AND MISSILE PROPULSION DIV/SPACECRAFT BRANCH
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| The current paper reports on the implementation of a numerical solver on the Graphic Processing Units (GPU) to model reactive gas mixture with detailed chemical kinetics. The solver incorporates high-order finite volume methods for solving the fluid dynamical equations coupled with stiff source terms. The chemical kinetics are solved implicitly via an operator-splitting method. We explored different approaches in implementing a fast kinetics solver on the GPU. The detail of ... |
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| Mathematical Modeling to Reduce the Cost of Complex System Testing: Characterizing Test Coverage to Assess and Improve Information Return |
21 Sep 2011 |
88 pages |
| Authors:
Karl D Pfeiffer; Valery A Kanevsky; Thomas J Housel; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF OPERATIONAL AND INFORMATION SCIENCES
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| Effective, cost-efficient testing is critical to the long-term success of Open Architecture within the Navy's Integrated Warfare System. In previous research, we developed a simple, effective framework for examining the testing of complex systems. This model and its prototype decision aid provide a rigorous yet tractable approach to improve system testing, and to better understand and document the system and component interdependencies across the enterprise. An integral part of this ... |
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| Shadowcopy: A Python-Based Shadow Volume Enumeration and Digest Tool |
12 Sep 2011 |
23 pages |
| Authors:
Mike Horn; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE
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| This report presents shadowcopy, tool written in Python that extracts and deduplicates files from Microsoft NTFS Shadow copies using the Microsoft Volume Shadow Service (VSS), copies the files to an external volume, and prepares a report of each extracted file's name, timestamp, original path, and MD5 hash value |
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| A Comparative Analysis of File Carving Software |
12 Sep 2011 |
22 pages |
| Authors:
Timothy Courrejou; Simson L Garfinkel; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Though there has been significant research into file carvers, there has been little comparison or validation of different file carvers. Such comparison and validation is vital if the state of the art is to progress. We present a methodology for comparing file carvers based on realistic data and present the results of applying the carver to the Foremost, Scalpel, PhotoRec, and Adroit, carvers. |
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| Uncertainty-Based Self Configuring Simulation for Design Support |
09 Sep 2011 |
7 pages |
| Authors:
Roger A Dougal; Ferdinanda Ponci; SOUTH CAROLINA UNIV COLUMBIA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| The authors introduce the idea of using a criterion based on uncertainty propagation for appropriate detail for a model given a simulation task. A guideline to achieve this goal is proposed. A process to synthesize the differences in accuracy between the levels of the model of a component is developed so that the proposed guideline can be implemented in a solver. This approach comprises a preliminary simulation of the components, ... |
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| An Empirical Analysis of the Cascade Secret Key Reconciliation Protocol for Quantum Key Distribution |
Sep 2011 |
85 pages |
| Authors:
Timothy I Calver; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Cryptography provides the means to securely communicate data between authorized entities by using mathematical transformations which utilize preshared cryptographic keys. The need to share key material with authorized entities in a secure, efficient and timely manner has driven efforts to develop new key distribution methods. The most promising method is Quantum Key Distribution (QKD) and is considered to be unconditionally secure because it relies upon the immutable laws of quantum ... |
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| A Distributed Middleware-Based Architecture for Fault-Tolerant Computing over Distributed Repositories |
Sep 2011 |
93 pages |
| Authors:
Sharma Chakravarthy; TEXAS UNIV AT ARLINGTON
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| This project has established the foundations for developing a Distributed Middleware-based Architecture for Fault tolerant Computing Over Distributed Repositories . During this project, the sub problems and related issues were identified and the creation of an integrated solution was investigated. In this project, the contractor implemented proof principle systems to show the effectiveness of the proposed approaches. The simulator has been extended to incorporate features specific to this scenario and ... |
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| ProjectHPC: A Multi-Tier Architecture for Simulation and Analysis |
Sep 2011 |
18 pages |
| Authors:
Jerry Clarke; Kelly Kirk; James Collins; Ankur Chopra; Kenneth Renard; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD COMPUTATIONAL AND INFORMATION SCIENCES DIRECTORATE
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| For Mobile Network Modeling, Multi-Scale Modeling, and Blast Protection for Platforms and Personnel, ARL is developing and providing a variety of codes and tools that require a wide range of computer sophistication from the user. This diverse and complex software supports a range of interfaces that extend from simple, intuitive interfaces with a minimal number of options to scalable, parallel simulators that are submitted via a batch queuing system. Subject ... |
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| A New Orbital Analyst Tool for Associating Un-cataloged Analyst Debris with Historical Launches, Breakups, and Anomalous Events |
Sep 2011 |
12 pages |
| Authors:
Bruce R Bowman; Robin Thurston; Robert Teets; AIR FORCE SPACE COMMAND PETERSON AFB CO
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| A suite of astrodynamic software tools has been developed for associating un-catalogued analyst satellite debris with historical launches, breakups, and anomalous events. A semi-analytical orbit integrator is at the heart of the tool suite. To associate currently tracked analyst debris with events occurring over 30 to 45 years ago requires an orbit integrator that predicts orbit plane ascending node values accurately, with errors no more than a few degrees over ... |
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| Calibration Binaries |
Sep 2011 |
6 pages |
| Authors:
Jack D Drummond; AIR FORCE RESEARCH LAB KIRTLAND AFB NM DIRECTED ENERGY DIRECTORATE
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| Two Excel Spreadsheet files are offered to help calibrate telescope or camera image scale and orientation with binary stars for any time. One is a personally selected list of fixed position binaries and binaries with well-determined orbits and the other contains all binaries with published orbits. Both are derived from the web site of the Washington Double Star Library. The spreadsheets give the position angle and separation of the binaries ... |
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| Advanced Prosthetic Gait Training Tool |
Sep 2011 |
19 pages |
| Authors:
Karim Abdel-Malek; Rajankumar Bhatt; John Yack; Salam Rahmatalla; Jason Wilken; Rich Degenhardt; IOWA UNIV IOWA CITY
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| The objective of our study is to produce a computer-based Advanced Prosthetic Gait Training Tool to aid in the training of clinicians at military treatment facilities providing care for wounded service members. In Year 1 of the effort, significant work was completed at the University of Iowa Center for Computer-Aided Design (CCAD), the University of Iowa Orthopedic Gait Analysis Laboratory (OGAL), and the Military Performance Laboratory (MPL). A representative set ... |
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| Demonstration of the DSST State Transition Matrix Time-Update Properties Using the Linux GTDS Program |
Sep 2011 |
23 pages |
| Authors:
Paul J Cefola; Chris Sabol; Keric Hill; Daron Nishimoto; AIR FORCE RESEARCH LAB KIHEI MAUI HI DETACHMENT 15
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| The semi-analytical theory for the motion of a space object replaces the conventional equations of motion with two formulas: (1) equations of motion for the mean equinoctial elements, and (2) expressions for the short periodic motion in the equinoctial elements. Very complete force models have been developed for the mean element equations of motion and for the short periodic motion. There is also a semi-analytical theory for the partial derivatives ... |
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| Intuitive Space Weather Displays to Improve Space Situational Awareness (SSA) |
Sep 2011 |
8 pages |
| Authors:
Paul Picciano; George Reis; APTIMA INC WOBURN MA
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| Making definitive attributions concerning satellite anomalies proves to be a challenging endeavor given the dynamic space environment, the threat of adversarial actions, and unanticipated system failures. Further, decision makers are usually contending with performance-shaping factors such as time pressure and the knowledge that errors can be extremely costly. Significant consequences can emerge with erroneous conclusions, whether it's failing to thwart an adversary's attack against our space assets, or misconstruing an ... |
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| Affordable Emerging Computer Hardware for Neuromorphic Computing Applications |
Sep 2011 |
6 pages |
| Authors:
Morgan Bishop; Michael J Moore; Daniel J Burns; Robinson E Pino; Richard Linderman; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
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| We are pursuing an investigation of neuromorphic computational models and architectures in order to leverage present understanding of how the estimated 1011 neurons and 1015 neuron connections in the mammalian brain are able to do some of the things a human does, and as quickly as it does it, using slow base components, while consuming very little power on affordable synthetic non-biological computing hardware. Understanding and harvesting neurologically based methods ... |
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| Applying Massively Parallel Kinetic Monte Carlo Methods to Simulate Grain Growth and Sintering in Powdered Metals |
Sep 2011 |
121 pages |
| Authors:
Aaron M Hay; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Kinetic Monte Carlo (KMC) simulation methods were utilized to study the grain growth and sintering of nanocrystalline metal compacts. Sintering is the process used to fabricate materials from powders by densifying the powder compact at elevated temperatures. Recently, experimental literature has demonstrated that nanoparticles ( 50 nm) can be used to bond materials at dramatically lower temperatures and pressures while maintaining the mechanical properties of nanostructured materials. Despite these promising ... |
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| Guidance, Navigation, and Control System Simulations via Graphics Processor Unit |
Sep 2011 |
18 pages |
| Authors:
Mark Ilg; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Monte Carlo simulation is crucial in the design, development, and execution of a guided projectile program. Graphics processing units (GPUs) are powerful parallel computing devices that are increasingly being used for general purpose (GP) computing. This technical report details the use of GPUs for Monte Carlo simulations with the goal of aiding the Guidance, Navigation, and Control (GN&C) engineer during the design phase of a guided weapon. This report provides ... |
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| Investigation of Transitional Flows on Compressor Blades in Cascade |
Sep 2011 |
111 pages |
| Authors:
Michael L Holihan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Flow around polished second-generation controlled-diffusion blades in cascade set at their design inlet flow angle was investigated at various Reynolds numbers using static pressure measurements, five-hole probe surveys, twocomponent laser Doppler velocimetry (LDV), computational fluid dynamics and flow visualization. A suction-side separation bubble formed at Reynolds number, based on chord length, of 203,000 and collapsed by a Reynolds number of 393,000. Five-hole probe surveys characterized the blade-row inlet and outlet ... |
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| The Effect of Time-Advance Mechanism in Modeling and Simulation |
Sep 2011 |
318 pages |
| Authors:
Ahmed A Alrowaie; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| As the discipline of Modeling and Simulation (M&S) becomes more complex, modelers are faced with mounting challenges to design and analyze simulations that effectively address difficult problems across military, industrial, and societal fields. Understanding the effects of time-advance mechanisms (TAMs) is essential to making advances in the design and use of M&S across a wide variety of domains. We perform a series of empirical studies to characterize and compare the ... |
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| Changing the Paradigm: Simulation, a Method of First Resort |
Sep 2011 |
105 pages |
| Authors:
Ben L Anderson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The computing capability to which Operations Research (OR) analysts have access today is over 1,000,000,000 times more powerful than the first simulation pioneers had sixty years ago, yet the concept that simulation is a method of last resort still plagues the OR community. Many real-world problems are complex, with properties such as high dimensionality, non-linear effects, stochastic elements, and dependence between variables. Solving these problems analytically often requires simplifying assumptions, ... |
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| Development of Model List Conversion Application |
Sep 2011 |
40 pages |
| Authors:
Milton A Lamb; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND REDSTONE ARSENAL AL
|
| ModelListConvert is an application to aid in the conversion of the Aviation and Missile Research, Development, and Engineering Center (AMRDEC) Weapons Development and Integration (WDI) Directorate Air Defense Artillery (ADA) trainer's model list file. The task was given to convert modellist.bhv from its original formatting to a spreadsheet format for dissemination. It became clear that a more efficient method was needed than to manually convert the file. An application, ModelListConvert, ... |
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| A Comparative Analysis of the Snort and Suricata Intrusion-Detection Systems |
Sep 2011 |
68 pages |
| Authors:
Eugene Albin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Our research focuses on comparing the performance of two open-source intrusion-detection systems, Snort and Suricata, for detecting malicious activity on computer networks. Snort, the de-facto industry standard open-source solution, is a mature product that has been available for over a decade. Suricata, released two years ago, offers a new approach to signature-based intrusion detection and takes advantage of current technology such as process multithreading to improve processing speed. We ran ... |
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| Testing a Low-Interaction Honeypot against Live Cyber Attackers |
Sep 2011 |
90 pages |
| Authors:
Erwin E Frederick; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The development of honeypots as decoys designed to detect, investigate, and counterattack unauthorized use of information systems has produced an arms race between honeypots (computers designed solely to receive cyber attacks) and anti-honeypot technology. To test the current state of this race, we performed experiments in which we ran a small group of honeypots, using the low-interaction honeypot software Honeyd, on a network outside campus firewall protection. For 15 weeks, ... |
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| A Registrar Administration System Requirements Analysis and Product Recommendation for Marine Corps University, Quantico, VA |
Sep 2011 |
101 pages |
| Authors:
Daniel E Good; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE
|
| Marine Corps University (MCU) is a relatively young organization and continues to mature as it brings more academic functionality and oversight under centralized control, especially in the area of Information Technology (IT). Much of MCU's IT control and responsibility still remains decentralized down to the school and college level. This research focuses on a specific IT capability, a Registrar Administration System (RAS). An RAS may also be termed a Student ... |
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| A Quantitative Model for Assessing Visual Simulation Software Architecture |
Sep 2011 |
143 pages |
| Authors:
Robert W Harder; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE
|
| The U.S. military is the largest single user of simulation in the world, and our visual simulations can be softwareintensive systems with a lifespan of many years. Managers of these simulations need tools to help them make better decisions at the architectural level. Currently, no such quantitative models with supporting metrics exist for this purpose. There are properties that are held as positive characteristics in visual simulation architectures. Visual simulation ... |
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| A Software Assurance Framework for Mitigating the Risks of Malicious Software in Embedded Systems Used in Aircraft |
Sep 2011 |
119 pages |
| Authors:
Robert C Ginn; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Malicious software represents a significant and growing threat to Department of Defense systems. Threats to airborne systems in particular can be characterized not by system vulnerability to Internet based exploits but rather by the risk posed by malicious code already present in the system's software. Although there are software techniques to detect and prevent certain types of attacks, a Systems Engineer has access to system level information and system design ... |
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| Web Applications and Thin Clients in the Navy |
Sep 2011 |
109 pages |
| Authors:
Jeremy L Britt; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF INFORMATION SCIENCES
|
| This thesis investigates the advantages and disadvantages of transitioning to Web Applications and Thin Client-Server Architecture for U.S. Navy shore based Components. Thin Clients and Web Technology have advanced significantly over the last few years and now more than ever, offer a multitude of cost efficient solutions. In the past, networking technology and bandwidth limitations made traditional Personal Computers or Fat Clients a more viable option for Naval Commands. The ... |
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| Representing Trust in Cognitive Social Simulations |
Sep 2011 |
85 pages |
| Authors:
Shawnoah Pollock; NAVAL POSTGRADUATE SCHOOL MONTEREY CA MODELING VIRTUAL ENVIRONMENTS AND SIMULATION (MOVES)
|
| Trust plays a critical role in communications, strength of relationships, and information processing at the individual and group levels. Cognitive social simulations show promise in providing an experimental platform for the examination of social phenomena such as trust formation. This work is a novel attempt at trust representation in a cognitive social simulation using reinforcement learning algorithms. Initial algorithm development was completed within a standalone social network simulation and tested ... |
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| Adaptive Discrete Event Simulation for Analysis of Harpy Swarm Attack |
Sep 2011 |
59 pages |
| Authors:
Bradon J Cobb; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Harpy swarm attacks are a new type of threat designed for Suppression of Enemy Air Defenses. Research into combating Harpy swarm attacks has been conducted but the simulation software used to date, Naval Simulation System, is inadequate for future research. A new and mission-focused simulation tool is necessary in order to advance research in defensive tactics against Harpy and other unmanned aerial vehicle threats (UAV). This research develops a simulation ... |
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Computer Programming and Software
