| Evaluation of the Weather Research and Forecast Model Over Dugway, Utah During 2009 |
Nov-2009 |
68 pages |
| Authors:
Robert Dumais; Robert Flanigan; Barbara Sauter; Jeffrey Passner; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM COMPUTATIONAL AND INFORMATION SCIENCE DIRECTORATE
|
 | The U.S. Army Research Laboratory (ARL) performed numerous case studies of the Advanced Research version of the Weather Research and Forecasting (WRF) model at horizontal resolutions of 3 and 1 km to better understand weather output for military use. ARL's devised model sensitivity experiments of several WRF parameterizations including the vertical resolution of 40, 60, and 80 levels, model time steps of 9 and 3 seconds, three different explicit microphysics, ... |
|
| Assessment of a Bayesian Model and Test Validation Method |
11-Aug-2009 |
17 pages |
| Authors:
Greg Hulbert; Panos Papalambros; Yogita Pai; Michael Kokkolaras; Michael K Pozolo; Yan Fu; Ren-Jye Yang; Saeed Barbat; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND WARREN MI
|
| Bayesian framework promising for validation: incorporates statistics of field data, incorporates statistics of M&S, and enables systematic evaluation of data variability. Systematic method for accepting and comparing M&S. Further refinement needed for calibration and sensitivity. Further research required for accreditations use. |
|
| 2008 Post-Election Voting Survey of Local Election Officials: Statistical Methodology Report |
Aug-2009 |
27 pages |
| Authors:
DEFENSE MANPOWER DATA CENTER ARLINGTON VA
|
| This report describes sample design, sample selection, weighting, and variance estimation procedures for the 2008 Post-Election Voting Survey of Local Election Officials. The first section of this report describes the design and selection of sample. The second section provides information on weighting and variance estimation. The final section describes the calculation of response rates, location rates, and completion rates for the full sample and for population subgroups. |
|
| 2008 Post-Election Voting Survey of Unit Voting Assistance Officers: Statistical Methodology Report |
Aug-2009 |
24 pages |
| Authors:
DEFENSE MANPOWER DATA CENTER ARLINGTON VA
|
| This report describes sample design, sample selection, weighting, and variance estimation procedures for the 2008 Post-Election Voting Survey of Unit Voting Assistance Officers. The first section of this report describes the design and selection of sample. The second section provides information on weighting and variance estimation. The final section describes the calculation of response rates, location rates, and completion rates for the full sample and for population subgroups. |
|
| 2008 Post-Election Voting Survey of Uniformed Service Members: Stastical Methodology Report |
Aug-2009 |
53 pages |
| Authors:
DEFENSE MANPOWER DATA CENTER ARLINGTON VA
|
| This report describes sample design, sample selection, weighting, and variance estimation procedures for the 2008 Post-Election Voting Survey of Uniformed Service Members. The first section of this report describes the design and selection of sample. The second section provides information on weighting and variance estimation. The final section describes the calculation of response rates, location rates, and completion rates for the full sample and for population subgroups. |
|
| 2008 Post-Election Voting Survey of Overseas Citizens: Statistical Methodology Report |
Aug-2009 |
26 pages |
| Authors:
DEFENSE MANPOWER DATA CENTER ARLINGTON VA
|
| This report describes sample design, sample selection, weighting, and variance estimation procedures for the 2008 Post-Election Voting Survey of Overseas Citizens. The first section of this report describes the design and selection of sample. The second section provides information on weighting and variance estimation. The final section describes the calculation of response rates, location rates, and completion rates for the full sample and for population subgroups. |
|
| 2008 Post-Election Voting Survey of Department of State Voting Assistance Officers: Statistical Methodology Report |
Aug-2009 |
20 pages |
| Authors:
DEFENSE MANPOWER DATA CENTER ARLINGTON VA
|
| This report describes sample design, sample selection, weighting, and variance estimation procedures for the 2008 Post-Election Voting Survey of Department of State Voting Assistance Officers. The first section of this report describes the design and selection of sample. The second section provides information on weighting and variance estimation. The final section describes the calculation of response rates, location rates, and completion rates for the full sample and for population subgroups. ... |
|
| 2008 Post-Election Voting Survey of Federal Civilians Overseas: Statistical Methodology Report |
Aug-2009 |
28 pages |
| Authors:
DEFENSE MANPOWER DATA CENTER ARLINGTON VA
|
| This report describes sample design, sample selection, weighting, and variance estimation procedures for the 2008 Post-Election Voting Survey of Federal Civilians Overseas. The first section of this report describes the design and selection of sample. The second section provides information on weighting and variance estimation. The final section describes the calculation of response rates, location rates, and completion rates for the full sample and for population subgroups. |
|
| Homosexuals and the U.S. Military: Current Issues |
22-Jul-2009 |
|
| Authors:
David F Burrelli; Jody Feder; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | In 1993, new laws and regulations pertaining to homosexuals and U.S. military service came into effect reflecting a compromise in policy. This compromise, colloquially referred to as don't ask, don't tell, holds that the presence in the armed forces of persons who demonstrate a propensity or intent to engage in homosexual acts would create an unacceptable risk to the high standards of morale, good order and discipline, and unit cohesion ... |
|
| PSPP: A Protein Structure Prediction Pipeline for Computing Clusters |
Jul-2009 |
10 pages |
| Authors:
Jaques Reifman; Nela Zavaljevski; Anders Wallqvist; In-Chul Yeh; Valmik Desai; Michael S Lee; Rajkumar Bondugula; ARMY MEDICAL RESEARCH AND MATERIEL COMMAND FORT DETRICK MD
|
| Background: Protein structures are critical for understanding the mechanisms of biological systems and, subsequently, for drug and vaccine design. Unfortunately, protein sequence data exceed structural data by a factor of more than 200 to 1. This gap can be partially filled by using computational protein structure prediction. While structure prediction Web servers are a notable option, they often restrict the number of sequence queries and/or provide a limited set of ... |
|
| Iraq: U.S. Casualties |
16-Apr-2009 |
|
| Authors:
Susan G Chesser; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The following casualty data were compiled by the Department of Defense (DOD), as tallied from the agency's press releases. Table 1 provides statistics on fatalities during Operation Iraqi Freedom, which began on March 19, 2003, and is ongoing, as well as on the number of fatalities since May 1, 2003, plus statistics on those wounded, but not killed, since March 19, 2003. Statistics may be revised as circumstances are investigated ... |
|
| Iraq: U.S. Casualties |
03-Apr-2009 |
|
| Authors:
Susan G Chesser; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The following casualty data was compiled by the Department of Defense (DOD), as tallied from the agenc's press releases. Table 1 provides statistics on fatalities during Operation Iraqi Freedom, which began on March 19, 2003, and is ongoing, as well as on the number of fatalities since May 1, 2003, plus statistics on those wounded, but not killed, since March 19, 2003. Statistics may be revised as circumstances are investigated ... |
|
| Probabilistic Sensitivity Analysis of Fretting Fatigue (Preprint) |
Apr-2009 |
14 pages |
| Authors:
Patrick J Golden; Harry R Millwater; Xiaobin Yang; TEXAS UNIV AT SAN ANTONIO DEPT OF MECHANICAL ENGINEERING AND BIOMECHANICS
|
| A probabilistic analysis of the fatigue life of specimens subject to fretting fatigue was carried out. A mechanics based fretting life analysis was applied that accounted for the local stress gradient at the edge of contact. The random variables in the analysis included the initial crack size, coefficient of friction, crack growth rate law, and the contact pad profile. The variation in pad profiles was determined through statistical analysis of ... |
|
| Effectiveness of Cognitive Exposure, and Skills Group Manualized Treatments in OIF/OEF Female Veterans |
Apr-2009 |
27 pages |
| Authors:
Diane T Castillo; LOVELACE BIOMEDICAL AND ENVIRONMENTAL RESEARCH INST ALBUQUERQUE NM
|
| The subject and purpose of the study are to evaluate and establish the effectiveness of three behavioral treatments--exposure, cognitive, and skills (assertiveness/relaxation) therapies--provided in a group format. Data began in February 2009, the last two months of the first annual reporting period. Therefore, the data have not yet been analyzed and there are no statistical results. The summary of the most significant findings of the study's progress are that the ... |
|
| Wrestling with Recruiting |
24-Mar-2009 |
36 pages |
| Authors:
Edward Nye; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Today's Soldiers have been compared to Soldiers of World War Two, and have been called the Strongest Generation. They face a resilient and adaptive enemy, meet the challenges of multiple deployments, and exceed all expectations. However, current statistics show that only 30 percent of youths between the ages of 17 and 24 are qualified for enlistment. To meet its annual recruiting goals, the U.S. Army has broadened its recruiting standards ... |
|
| Tree-Structured Methods for Prediction and Data Visualization |
18-Mar-2009 |
20 pages |
| Authors:
Wei-Yin Loh; WISCONSIN UNIV-MADISON
|
| The aim of the research is to develop the GUIDE algorithm into a fast, powerful, and comprehensive procedure for tree-structured prediction and data visualization. During this reporting period, the regression component was enhanced by the addition of least squares regression through the origin, best simple analysis of covariance, all subsets regression, and least median of squares regression. An option to truncate the predicted values also was added. A preliminary classification ... |
|
| Hybrid Robust Multi-Objective Evolutionary Optimization Algorithm |
10-Mar-2009 |
38 pages |
| Authors:
George S Dulikravich; FLORIDA INTERNATIONAL UNIV MIAMI DEPT OF MECHANICAL ENGINEERING
|
| A hybrid robust multi-objective optimization algorithm and accompanying software were developed that: 1) utilize several evolutionary optimization algorithms, a set of rules for automatic switching among these algorithms in order to accelerate the overall convergence and avoid termination in a local minimum, 2) involve development of algorithms for multi-dimensional response surfaces (metamodels) that are fast, accurate and robust by utilizing wavelet-based artificial neural networks, polynomials of radial basis functions, and ... |
|
| Interface Conditions for Hybrid RANS/LES Simulations of Complex and Compressible Flows |
06-Mar-2009 |
31 pages |
| Authors:
Ugo Piomelli; Elias Balaras; MARYLAND UNIV COLLEGE PARK DEPT OF MECHANICAL ENGINEERING
|
| We have demonstrated the applicability of synthetic turbulence coupled with the controlled-forcing method to generate eddies at the interface between RANS and LES in hybrid calculations. We obtained shorter transition regions and improved model accuracy. Realistic turbulence can be generated within 5 boundary-layer thicknesses of the RANS/LES interface even in cases in which the data supplied by the RANS is inaccurate, or the assumptions on which the forcing is based ... |
|
| Thermal Inactivation of Bacillus Anthracis using Laser Irradiation of Micro-Etched Platforms |
Mar-2009 |
131 pages |
| Authors:
Jeffrey B Bacon; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this research was to determine the probability of kill for a thermal inactivation strategy for use against biological agents; specifically the resilient endospore of Bacillus anthracis (Ba). The effort focused on short durations (milliseconds to several seconds) and temperatures (300 to 1300 K) simulating the periphery effects after an explosion generated by conventional munitions. For an improved statistical counting, applied microlithography techniques were used to produce micro-etched ... |
|
| Characterizing the Exhaust Plume of the Three-Electrode Micro Pulsed Plasma Thrusters |
Mar-2009 |
115 pages |
| Authors:
Seo Myeongkyo; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Three-electrode micro-PPTs are a new version of two electrode micro-PPTs devices. Performance predictions and contamination expectations are essential characteristics needed by satellite designers. In order to focus on thruster specific impulse, thrust and efficiency, measuring the exhaust velocity or impulse bit and propellant consumption rate is essential. While this is not always possible to measure directly, focusing on the ejected mass from the PPT provides significant information allowing determination of ... |
|
| Microstructure-Sensitive Extreme Value Probabilities for High Cycle Fatigue of Ni-Base Superalloy IN100 (Preprint) |
Mar-2009 |
48 pages |
| Authors:
Craig P Przybyla; David L McDowell; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| To quantify the effects of interactions between various microstructure attributes on fatigue life in the high cycle fatigue (HCF) regime, we have proposed a new microstructure-sensitive extreme value statistical framework. This framework couples the extreme value distributions of certain fatigue indicator parameters (FIPs) or response functions to the correlated microstructure attributes that exist at the extreme value locations of these FIPs. We demonstrate the application of this statistical framework to ... |
|
| To Live and Ride in Today's Marine Corps |
20-Feb-2009 |
18 pages |
| Authors:
J A Patacsil; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| Fiscal year 2008 was a dark time for the Marine Corps. Twenty-five motorcycle fatalities occurred that year, which is more than the number of combat deaths in Iraq for the same period. Concerned about these recent statistics, the Commandant of the Marine Corps (CMC) has put an emphasis on motorcycle safety and the continued improvement of the Marine Corps Motorcycle Safety Program. The CMC expressed how leaders and riders must ... |
|
| Focused Impact of II Marine Expeditionary Force Motorcycle Club Program |
20-Feb-2009 |
17 pages |
| Authors:
J B Cook; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| Nationally, the number of motorcyclist fatalities has increased for the 10th consecutive year (1997-2007). While making up only 3 percent of all registered vehicles, motorcyclist fatalities represent over 12% of all motor vehicle traffic fatalities. Marine Corps-wide, motorcyclist deaths have been rising for the 5th consecutive year (FY04-FY08). In FY08, motorcyclists constituted 49% of all motor vehicle traffic deaths in the Marine Corps. Nationally, the mean age of motorcyclists killed ... |
|
| Description and Evaluation of GDEM-V 3.0 |
06-Feb-2009 |
27 pages |
| Authors:
Michael R Carnes; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The GDEM (Generalized Digital Environment Model) has served as the U.S. Navy's global gridded ocean temperature and salinity climatology since its development began in 1975. This memorandum introduces a new version of this climatology, named GDEM-V 3.0, and discusses the techniques used in its construction. Several comparisons are shown between version 3.0 and the previous version (2.6) of GDEM to demonstrate several significant improvements. The largest change in methodology was ... |
|
| Estimating UTC - UTC (APL) at the JHU Applied Physics Laboratory |
01-Dec-2008 |
9 pages |
| Authors:
Mihran Miranian; Gregory L Weaver; Matthew J Reinhart; JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
|
| Our master clock accuracy goal at the Time and Frequency Laboratory of the Johns Hopkins University Applied Physics Laboratory (JHU/APL) is to maintain UTC (APL) within plus-or-minus 20 nanoseconds of UTC. This is a challenging goal, because it requires the estimation of the future character of UTC - UTC (APL) up to 6 weeks beyond the latest issue of Circular T from the BIPM. Furthermore, the accuracy of our timescale-based ... |
|
| Iraq: U.S. Casualties |
31-Oct-2008 |
|
| Authors:
Susan G Chesser; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The following casualty data was compiled by the Department of Defense (DOD), as tallied from the agency's press releases. Table 1 provides statistics on fatalities during Operation Iraqi Freedom, which began on March 19, 2003, and is ongoing, as well as on the number of fatalities since May 1, 2003, plus statistics on those wounded, but not killed, since March 19, 2003. Statistics may be revised as circumstances are investigated ... |
|
| Iraq: U.S. Casualties |
02-Oct-2008 |
|
| Authors:
Susan G Chesser; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The following casualty data was compiled by the Department of Defense (DOD), as tallied from the agency's press releases Table 1 provides statistics on fatalities during Operation Iraqi Freedom, which began on March 19, 2003, and is ongoing, as well as on the number of fatalities since May 1, 2003, plus statistics on those wounded, but not killed, since March 19, 2003. Statistics may be revised as circumstances are investigated ... |
|
| A Framework for Uncertainty Quantification in Nonlinear Multi-Body System Dynamics |
22-Sep-2008 |
9 pages |
| Authors:
D Negrut; M Datar; D Gorsich; D Lamb; WISCONSIN UNIV-MADISON DEPT OF MECHANICAL ENGINEERING
|
| This paper outlines a methodology for determining the statistics associated with the time evolution of a nonlinear multi-body dynamic system operated under input uncertainty. The focus is on the dynamics of ground vehicle systems in environments characterized by multiple sources of uncertainty: road topography, friction coefficient at the road/tire interface and aerodynamic force loading. Drawing on parametric maximum likelihood estimation, the methodology outlined is general and can be applied to ... |
|
| New Theoretical Frameworks for Machine Learning |
15-Sep-2008 |
|
| Authors:
Maria-Florina Balcan; CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF COMPUTER SCIENCE
|
| This thesis has two primary thrusts. The first is developing new models and algorithms for important modern and classic learning problems. The second is establishing new connections between Machine Learning and Algorithmic Game Theory. The formulation of the PAC learning model by Valiant [201] and the Statistical Learning Theory framework by Vapnik [203] have been instrumental in the development of machine learning and the design and analysis of algorithms for ... |
|
| Indicators and Indices of Conflict and Security: A Review and Classification of Open-Source Data |
Sep-2008 |
|
| Authors:
Nada J Pavlovic; David R Mandel; Lisa C Hoshino; A W Dorn; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
|
| With the advent of the World Wide Web (WWW), there has been a proliferation of readily accessible open-source databases on conflict and security indicators and indices. The sheer proliferation and diversity of information sources, however, demands an increasing level of knowledge management to maximize the utility of the available information for end users. Part of that function involves discovering what data and information sources currently exist, as well as classifying ... |
|
| Mathematical Frameworks for Diagnostics, Prognostics and Condition Based Maintenance Problems |
15-Aug-2008 |
189 pages |
| Authors:
Andrew Scott; Kaveh Heidary; ALABAMA A AND M UNIV NORMAL OFFICE FOR RESEARCH AND DEVELOPMENT
|
| This report documents the theoretical and computational investigation of statistical pattern recognition techniques and Bayesian Networks (BN). The application of statistical pattern recognition methodology and Bayesian Networks to automatic fault diagnostics, fault prognostics, and condition based maintenance (CBM) is explored. The theory of Margin-Setting, a new pattern recognition method developed by researchers at Alabama A&M University, is documented and its applicability to problems of interest to Army is investigated. Extensive ... |
|
| A Path Following Algorithm for Sparse Pseudo-Likelihood Inverse Covariance Estimation (SPLICE) |
24-Jul-2008 |
43 pages |
| Authors:
Bin Yu; Peng Zhao; Guilherme V Rocha; CALIFORNIA UNIV BERKELEY DEPT OF STATISTICS
|
| Given n observations of a p-dimensional random vector, the covariance matrix and its inverse (precision matrix) are needed in a wide range of applications. Sample covariance (e.g. its eigenstructure) can misbehave when p is comparable to the sample size n. Regularization is often used to mitigate the problem. In this paper, we proposed an l1 penalized pseudo-likelihood estimate for the inverse covariance matrix. This estimate is sparse due to the ... |
|
| Schweinfurt Raids and the Pause in Daylight Strategic Bombing |
13 JUN 2008 |
96 pages |
| Authors:
Greg A. Grabow; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| Avid readers of WWII air combat will find the Eighth AAF's strategic bombing mission #84 (the Schweinfurt-Regensburg raid on August 17th, 1943) and mission #115 (the Schweinfurt raid on October 14th, 1943) to be tremendous setbacks to the daylight strategic bombing campaign of Germany. As a result of the heavy losses the Luftwaffe inflicted upon Eighth Bomber Command's heavy bombers, the daylight strategic bombing campaign was halted for over four ... |
|
| PTSD Type Symptoms and CGSC class 08-01, a Study of Field Grade Officers and Implications for the Future |
13 JUN 2008 |
93 pages |
| Authors:
Jr Dixon Richard L.; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| With the emergence of the Global War on Terror (GWOT), the mental illness of Post Traumatic Stress Disorder (PTSD) is increasingly identified in returning veterans. A 2006 mental health study released by the Pentagon found 11% of returning OEF veterans and 19% of returning OIF veterans have mental health issues. Of the veterans sampled, 5% were Army Officers and 2% were Marine Officers. Thus, the primary research question was: Are ... |
|
| New Directions in Complex Data Analysis for Emerging Applications |
13-Jun-2008 |
23 pages |
| Authors:
Hamid Krim; NORTH CAROLINA STATE UNIV AT RALEIGH
|
| The workshop was organized into four thematic sessions including interdisciplinary trends, algebraic geometry, differential geometry and statistics, and topological and geometric features of data. The invited speakers were directed to consider the workshop as a visionary forum. The presentations were all limited to ten minutes with an emphasis on new directions, open problems, and provocative speculation. These were followed by breakout sessions where the presented material was further discussed in ... |
|
| Challenges of Self-Reported Medical Conditions and Electronic Medical Records Among Members of a Large Military Cohort |
05-Jun-2008 |
12 pages |
| Authors:
Besa Smith; Tyler C Smith; Margaret A Ryan; Tomoko I Hooper; Edward J Boyko; Laura K Chu; Paul J Amoroso; Gary D Gackstettter; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Self-reported medical history data are frequently used in epidemiological studies. Self-reported diagnoses may differ from medical record diagnoses due to poor patient-clinician communication, self-diagnosis in the absence of a satisfactory explanation for symptoms, or the health literacy of the patient. The US Department of Defense military health system offers a unique opportunity to evaluate electronic medical records with near complete ascertainment while on active duty. This study compared 38 self-reported ... |
|
| Analyzing the Effects of Human Performance Under Stress |
01-Jun-2008 |
83 pages |
| Authors:
Daniel B Ammons-Moreno; Kathleen E Pauls; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In order to analyze the effects of stress on human performance, we examined baseball players because of the large body of data and many measures of performance available. Clutch hitting is examined because a baseball player batting in a clutch situation is analogous to a person who is performing in a stressful situation. The more important, or clutch, the situation the more stress the player may feel. Statistical measures were ... |
|
| Intelligent Information Systems Institute |
01-Jun-2008 |
|
| Authors:
Carla P Gomes; CORNELL UNIV ITHACA NY
|
| The Intelligent Information Systems Institute began operation in December of 2000. Its mandate is threefold: To perform and stimulate research in computer and data-intensive methods for intelligent decision making systems; to foster collaborations between Cornell researchers, AFRL, in particular IF, and the scientific community; and to play a leadership role in the research and dissemination of the core areas of the institute. IISI supports basic research within the Faculty of ... |
|
| Iraqi Civilian Casualties Estimates |
16-May-2008 |
|
| Authors:
Hannah Fischer; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| This report presents various governmental and nongovernmental estimates of Iraqi civilian dead and wounded. The Department of Defense (DOD) regularly updates total U.S. military death and wounded statistics from Operation Iraqi Freedom (OIF), as reflected in CRS Report RS21578, Iraq: Summary of U.S. Casualties. However, no Iraqi or U.S. government office regularly releases publically available statistics on Iraqi civilian deaths or civilians who have been wounded. Statistics on Iraqi civilian ... |
|
| Data Analysis Project: Leveraging Massive Textual Corpora Using n-Gram Statistics |
01-May-2008 |
31 pages |
| Authors:
Ian Fette; Andrew Carlson; Tom M Mitchell; CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE
|
| We study methods of efficiently leveraging massive textual corpora through n-gram statistics. Specifically, we explore algorithms that use a database of frequency counts for sequences of tokens in a teraword Web corpus to correct spelling mistakes and to extract a list of instances of some category given only the name of the target category. For spelling correction, we use a novel correction algorithm and demonstrate high accuracy in correcting both ... |
|
| White Sands Missile Range 2007 Urban Study: Data Processing - Volume DP-3 (Airflow Qualitative Assessment) |
MAY 2008 |
|
| Authors:
Gail Vaucher; Manuel Bustillos; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM COMPUTATIONAL AND INFORMATION SCIENCE DIRECTORATE
|
| Urban toxic chemical releases pose a threat to the military and civilians. The White Sands Missile Range (WSMR) Urban Studies address two critical elements in diagnosing airborne hazard releases, namely, airflow (chemical distribution) and stability (chemical concentration). This document provides a qualitative assessment of seven airflow features targeted by the WSMR 2007 Urban Study (W07US). The W07US stability assessment is published separately. The features identified for verification and characterization include ... |
|
| Heterogeneous Deformation and Spall of an Extruded Tungsten Alloy: Plate Impact Experiments and Crystal Plasticity Modeling |
01-Apr-2008 |
|
| Authors:
T J Vogler; J D Clayton; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The role of microstructure in the dynamic deformation and fracture of a dual phase, polycrystalline tungsten alloy under highrate impact loading is investigated via experiments and modeling. The material studied consists of pure tungsten crystals embedded in a ductile binder alloy comprised of tungsten, nickel, and iron. The tungsten crystals are elongated in a preferred direction of extrusion during processing. Plate impact tests were conducted on samples oriented either perpendicular ... |
|
| Dredged Material Analysis Tools; Performance of Acute and Chronic Sediment Toxicity Methods |
APR 2008 |
73 pages |
| Authors:
Jeffery Steevens; Alan Kennedy; Daniel Farrar; Cory McNemar; Mark R. Reiss; Roy K. Kropp; Jon Doi; Todd Bridges; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
| This report and research were supported by the U.S. Army Corps of Engineers New York District and U.S. Environmental Protection Agency Region 2. The work was conducted to provide insight into the potential advantages and disadvantages of using chrome semi toxicity tests with relevant benthic micro invertebrates as part of dredged material evaluations, as described in the Inland and Ocean Testing Mammals (USEPA/USACE 1991, 1998). Nine sediments collected from the ... |
|
| Drug Usage in Pilots Involved in Aviation Accidents Compared With Drug Usage in the General Population: From 1990 to 2005 |
APR 2008 |
12 pages |
| Authors:
Sabra R. Botch; Robert D. Johnson; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROSPACE MEDICAL INST
|
| Civil aviation pilots represent a small subsection of the general population. Therefore, one might expect to see the same types of drugs used by pilots that are found in the general population. The purpose of this study was to compare usage of both illegal drugs and abused prescription medications in pilots involved in civil aviation accidents from 1990 to 2005 with that of the general population in the United States. ... |
|
| The Implementation of a Python Class for Structuring Network Data Collected in a Test Bed |
APR 2008 |
30 pages |
| Authors:
Binh Q. Nguyen; ARMY RESEARCH LAB ADELPHI MD
|
| This report documents an internally developed Python class that takes in a set of data files and organizes them into effective data structures that are suitable for the subsequent extraction, processing, and analysis. The report includes usage examples by describing Python snippets that perform statistical calculations and that transform the data into comma-separated values. Sample input and output data are appended to the report. |
|
| Digital Signal Processing Leveraged for Intrusion Detection |
27 MAR 2008 |
106 pages |
| Authors:
Theodore J. Erickson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis describes the development and evaluation of a novel system called the Network Attack Characterization Tool (NACT). The NACT employs digital signal processing to detect network intrusions, by exploiting the Lomb-Scargle periodogram method to obtain a spectrum for sampled network traffic. The Lomb-Scargle method for generating a periodogram allows for the processing of unevenly sampled network data. The spectrum is examined to determine if features exist above a significance ... |
|
| Sustainable Design Policy and Leadership in Energy and Environmental Design Certification |
01-Mar-2008 |
105 pages |
| Authors:
David M Nyikos; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The 2007 Air Force Sustainable Development and Design Policy mandates the use of Leadership in Energy and Environmental Design (LEED ) criteria for military construction projects. Additionally, the policy authorizes adding two percent of the original building budget to the total building budget in order to fund the resulting sustainable design costs. To determine if the specific sustainable design goals of this policy had statistical support in the population of ... |
|
| Afghanistan Reconstruction - A Quantitative Analysis of the International Effort |
MAR 2008 |
159 pages |
| Authors:
Jr O'Connell Thomas J.; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Since the start of Operation Enduring Freedom nearly seven years ago, Afghanistan has made only very limited progress towards reconstruction. While they have experienced limited political progress under the framework agreed to in Bonn Agreement, the development, reform, and progress in other sectors of the society have predominantly fallen short of expectations. After several years of relative calm, the Taliban reemerged in 2004 significantly increasing their operations and territorial control ... |
|
| Statistical Removal of Shadow for Applications to Gait Recognition |
MAR 2008 |
73 pages |
| Authors:
Brian Hockersmith; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this thesis is to mathematically remove the shadow of an individual on video. The removal of the shadow will aid in the rendering of higher quality binary silhouettes than previously allowed. These silhouettes will allow researchers studying gait recognition to work with silhouettes unhindered by unrelated data. The thesis begins with the analysis of videos of solid colored backgrounds. A formulation of the effect of shadow on ... |
|
| Iraqi Police and Security Forces Deaths Estimates |
29 FEB 2008 |
|
| Authors:
Hannah Fischer; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| This report presents various governmental and non-governmental estimates of Iraqi police and security forces fatalities. The Department of Defense (DOD) regularly updates total U.S. military deaths and wounded statistics from Operation Iraqi Freedom (OIF), as reflected in CRS Report RS21578, Iraq: Summary of U.S. Casualties, but has not regularly released detailed statistics on Iraqi security forces deaths. For information on Iraqi civilian deaths, see CRS Report RS22537, Iraqi Civilian Deaths ... |
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