| Performance Analysis of Live-Virtual-Constructive and Distributed Virtual Simulations: Defining Requirements in Terms of Temporal Consistency |
Dec-2009 |
134 pages |
| Authors:
Douglas D Hodson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | This research extends the knowledge of live-virtual-constructive (LVC) and distributed virtual simulations (DVS) through a detailed analysis and characterization of their underlying computing architecture. LVCs are characterized as a set of asynchronous simulation applications each serving as both producers and consumers of shared state data. In terms of data aging characteristics, LVCs are found to be first-order linear systems. System performance is quantified via two opposing factors; the consistency of ... |
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| Conditional Reliability and the Identification of Communities |
09-Nov-2009 |
7 pages |
| Authors:
Charles J Colbourn; Violet R Syrotiuk; ARIZONA STATE UNIV TEMPE
|
| This document reports on results obtained in the investigation of a collection of methods for using indirect measurements of usage patterns in communication networks with the goal of identifying communities of users. The primary methods developed include a generalization of connectivity-based network reliability measures to multiterminal resilience measures that permit a more detailed classification of types of communication; techniques for identifying indirect connections based on patterns of common usage rather ... |
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| Introduction to Astrodynamic Reentry |
09-Sep-2009 |
485 pages |
| Authors:
Kerry D Hicks; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This TR is actually a textbook on atmospheric entry for several classes at AFIT. It teaches from an analytical perspective, with finding closed-form solutions being the preferred approach. The over-arching goal is to instill and understand how families of solutions behave as well as the general trends, trade-offs, and the nature of atmospheric entry before picking point designs to study in detail. By thoroughly understanding the classic analytic analyses first, ... |
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| Low-Latitude Western North Atlantic Climate Variability During the Past Millennium: Insights from Proxies and Models |
Sep-2009 |
|
| Authors:
Casey P Saenger; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | Estimates of natural climate variability during the past millennium provide a frame of reference in which to assess the significance of recent changes. This thesis investigates new methods of reconstructing low-latitude sea surface temperature (SST) and hydrography, and combines these methods with traditional techniques to improve the present understanding of western North Atlantic climate variability. A new strontium/calcium (Sr/Ca) - SST calibration is derived for Atlantic Montastrea corals. This calibration ... |
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| Replicating Physiological Patterns of Activity with Prosthetic Stimulation |
Jul-2009 |
30 pages |
| Authors:
Shelley Fried; BOSTON VA RESEARCH INST MA
|
| We want to develop more effective methods of neural stimulation in order to improve the clinical outcomes associated with retinal prosthetics. To accomplish this, we are investigating the mechanism(s) by which different types of retinal neurons respond to electric stimulation. Previous studies have shown that ganglion cells, the output cells of the retina, can be activated directly and exclusively with short duration stimulus pulses[1-4]. However, the site of spike initiation ... |
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| Enhancing the Effectiveness of Ad Hoc Units: A Revised Training Model |
01-Jun-2009 |
123 pages |
| Authors:
Glenn J Woodson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| To meet the personnel shortfalls resulting from the Global War on Terror, the United States Civil Affairs and Psychological Operations Command developed an integrated approach to strength management - use of the ad hoc unit. This came at a cost however, generally in terms of lost efficiency and decreased capabilities to conduct tactical and operational Civil Affairs Operations. This thesis encapsulates fifteen months studying eight United States Army Civil Affairs ... |
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| Identifying and Overcoming Barriers to Diabetes Management in the Elderly: An Intervention Study |
Jun-2009 |
22 pages |
| Authors:
Medha N Munshi; JOSLIN DIABETES CENTER BOSTON MA
|
| This study investigates whether short-term focused intervention by a geriatric multidisciplinary team with the addition of a geriatric life specialist is superior to usual care (with attention control) in improving glycemic control and quality of life parameters in elderly patients with diabetes, and whether these interventions will have persistent effects on outcome measures. The study also evaluates improvement in cerebral perfusion in elderly with type 2 diabetes following a 6-month ... |
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| Simulation of Ballistic Impact of a Tungsten Carbide Sphere on a Confined Silicon Carbide Target |
Jun-2009 |
16 pages |
| Authors:
C G Fountzoulas; B A Cheeseman; J C LaSalvia; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The present investigation is a continuation of our previous study on the ability of the phenomenological Johnson-Holmquist model to predict the observed damage induced by spheres of tungsten carbide (WC) striking confined cylinders of silicon carbide (SiC) at velocities between 63 m/s to 500 m/s. In this study, the WC was modeled using the Johnson-Cook plasticity model along with a principal stress failure criterion calibrated with recently available experimental data. ... |
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| Optimization of a Paint Production Process |
Apr-2009 |
6 pages |
| Authors:
Pamela Najjar; OAKLAND UNIV ROCHESTER MI INDUSTRIAL AND SYSTEMS ENGINEERING
|
| The project will be conducted for the U.S. Army TARDEC Survivability Group. The main objective of this project is to integrate a pixilated camouflage paint pattern into the production process for the Future Combat Systems (FCS). Currently, military systems are coated with a single color of Chemical Agent Resistant Coating (CARC) for the entire vehicle. However, when the previous generation of camouflage was applied, it was done by hand, using ... |
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| Trust Me: Design Patterns for Constructing Trustworthy Trust Indicators |
Apr-2009 |
259 pages |
| Authors:
Serge Egelman; CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE
|
| In a world where making an incorrect online trust decision can mean giving away highly personal information to a con artist, Internet users need effective online trust indicators to help them make better trust decisions. In a perfect world, software could automatically detect all security threats and then block access to high risk web sites. Because there are many threats that we cannot detect with 100% accuracy and false positives ... |
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| Data Mining Report |
01-Mar-2009 |
9 pages |
| Authors:
OFFICE OF THE DIRECTOR OF NATIONAL INTELLIGENCE WASHINGTON DC
|
| The Office of the Director of National Intelligence (ODNI) is pleased to provide to Congress its second report pursuant to the Data Mining Reporting Act. The Data Mining Reporting Act requires the head of each department or agency of the Federal Government that is engaged in an activity to use or develop data mining, as defined by the Act, to report annually on such activities to the Congress. This report ... |
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| Sequential Pattern Detection and Time Series Models for Predicting IED Attacks |
Mar-2009 |
95 pages |
| Authors:
William B Stafford; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Improvised explosive device (IED) attacks are a significant threat to coalition forces. Defeating IEDs as weapons of strategic influence has become a major objective of Combatant Commanders and their respective Joint Task Forces. This thesis attempts to identify new approaches that can help operational forces mitigate the risk of IED attacks by identifying common sequences of events that occur before an IED attack and forecasting the number of attacks in ... |
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| Neuroticism Negatively Affects Multitasking Performance through State Anxiety |
Feb-2009 |
29 pages |
| Authors:
Hubert T Chen; Elizabeth M Poposki; Frederick L Oswald; NAVY PERSONNEL RESEARCH STUDIES AND TECHNOLOGY MILLINGTON TN
|
| Multitasking is on the rise, both at work and at home. As such, researchers have begun to focus attention on understanding and predicting multitasking performance. Though past research has demonstrated that cognitive predictors correlate positively with multitasking performance, there is reason to believe that non-cognitive factors are likely to predict such performance as well. This study tested for relationships between extraversion, neuroticism, Type A Behavior Pattern, polychronicity, and multitasking performance. ... |
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| Using Sign Patterns to Distinguish Feared Clock Events |
01-Dec-2008 |
15 pages |
| Authors:
Matthias Suess; Ulrich Grunert; GERMAN AEROSPACE CENTER (DLR) OBERPFAFFENHOFEN (GERMANY)
|
| The first and second difference of clock measurements is investigated to detect and identify clock events. A hypothesis test of the difference functions is described which is calibrated by given Allan deviations of the observed clock differences. The impact of four defined clock events, namely time step, frequency step, drift step, and outlier on the first and second differences is calculated. The analysis outlines that the sign of these calculations ... |
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| The Choice: Social Representation and the Formation of the Hellenic Armed Forces |
Dec-2008 |
275 pages |
| Authors:
Efthymios Domazos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| As societies of the developed part of the world evolved, new trends of military staffing have been coming up. The basic trend that used to exist globally till the end of WW-II was the conscription system, through which all citizens were obliged to serve. During the 20th century, when globalization became the new world concept, when terrorist attacks devaluated armies, when people became wealthier and more independent; military staffing, as ... |
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| Seasonal Distribution, Biology, and Human Attraction Patterns of Mosquitoes (Diptera: Culicidae) in a Rural Village and Adjacent Forested Site Near Iquitos, Peru |
Nov-2008 |
9 pages |
| Authors:
Roberto Fernandez; Faustino Carbajal; Michael J Turell; James W Jones; Terry A Klein; James E Pecor; Michael R Sardelis; Douglas M Watts; ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD VIROLOGY DIV
|
| This study was conducted as part of a field-ecology study of arboviral and malarial activity in the Amazon Basin, Loreto Department, Peru, to determine the relative abundance, species diversity, and seasonal and vertical distributions of potential mosquito vectors. Mosquitoes were captured either by volunteers using mouth aspirators while mosquitoes attempted to land on the collectors or in dry ice-baited ABC light traps. Anopheles darlingi, the principal malaria vector in the ... |
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| Supply Chain Resilience: Development of a Conceptual Framework, an Assessment Tool and an Implementation Process |
01-Oct-2008 |
420 pages |
| Authors:
Timothy J Pettit; OHIO STATE UNIV COLUMBUS
|
| The business environment is always changing and change creates risk. Managing the risk of the uncertain future is a challenge that requires resilience the ability to survive, adapt and grow in the face of turbulent change. Academics and industry leaders have seen the need to supplement traditional risk management techniques with the concept of resilience that is better designed to cope with extreme complexities, unpredictable events and adaptive threats. However, ... |
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| Detection of IED Emplacement in Urban Environments |
01-Sep-2008 |
61 pages |
| Authors:
Matthew P O'Hara; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This research will be focused on discovering patterns of activity that lead to the emplacement of IEDs by terrorists in urban environments. This research will employ a network in a predictive mode by looking for suspicious activity patterns and raising alerts when a pre-determined level of confidence is achieved in the prediction. The scope of this thesis will be to conduct various experiments using wireless sensor network motes to detect ... |
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| Data Strategies to Support Automated Multi-Sensor Data Fusion in a Service Oriented Architecture |
01-Jun-2008 |
240 pages |
| Authors:
Kurt J Rothenhaus; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The quantity of data available to decision makers of various types is rapidly expanding beyond the pace of manual interpretation techniques (Hobbins, 1). Introducing a Service Oriented Architectures (SOA) based web service framework that exposes even more data without sufficient guidance will exacerbate the situation. Ontology's, data descriptions and discovery methods alone are not enough to create the end-to-end solutions promised by SOA technologies. Software architectural patterns in conjunction with ... |
|
| Collaborative Learning Agent (CLA) for Trident Warrior |
01-Jun-2008 |
10 pages |
| Authors:
Ying Zhao; Chetan Kotak; Charles Zhou; QUANTUM INTELLIGENCE INC SANTA CLARA CA
|
| Collaborative Learning Agent (CLA) is a technology selected for Navy on Trident Warrior '08, which is an annual FORCEnet SEA Trial. The theme for '08 is "Maritime Domain Awareness". The objective is to demonstrate a set of CLAs in a distributed network to learn behavior patterns from historical MDA data and then apply them for search, prediction, and identification of anomalies and reasons that might cause the anomalies, e.g. weather ... |
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| Orchestration: The Movement and Vocal Behavior of Free-Ranging Norwegian Killer Whales (Orcinus Orca) |
01-Jun-2008 |
304 pages |
| Authors:
Ari D Shapiro; MASSACHUSETTS INST OF TECH CAMBRIDGE JOINT PROGRAM IN APPLIED OCEAN SCIENCE AND ENGINEERING
|
| Studying the social and cultural transmission of behavior among animals helps to identify patterns and content of interaction. Killer whales likely acquire traits culturally based on their stable social groups, population-specific feeding behaviors, and group-distinctive vocal repertoires. Digital tags were used to record the movements and vocalizations of Norwegian killer whales. These animals carousel feed, corralling herring into a ball before tail slapping, incapacitating and eating the fish. Periods of ... |
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| Improving Government's Retirement Plan Investments by Using Mining Tools for Discovery of Price Patterns and Combining Methods of Fundamental and Technical Analysis |
01-Jun-2008 |
121 pages |
| Authors:
Nikitas Goumatianos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| There are many tools available to government fund managers for making investment decisions, especially regarding the retirement options available to U.S. service members, including Social Security, Military Retirement, Traditional Individual Retirement Accounts (IRAs), Roth IRAs, and the Uniformed Services Thrift Savings Plan (TSP). This project concentrates on both long-term and short-term investments by exploiting the combination of two types of investment methods. The first is to predict the future directions ... |
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| Defense Industry Consolidation and Weapon Systems Cost Growth |
01-Jun-2008 |
117 pages |
| Authors:
Ioannis A Stratogiannis; Christos K Zahos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis is a survey of the cost growth of weapon systems acquisition by the U.S. Department of Defense (DoD). It attempts to assess whether the extensive consolidation of the defense industry has led to any significant reduction of cost growth. The primary data sources for the cost of weapon systems are the Selected Acquisition Reports (SAR), which are published by DoD for the major acquisition programs. After an introductory ... |
|
| Decentralization and Development: The Indian Balancing Act |
01-Jun-2008 |
87 pages |
| Authors:
Robert K Federal; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Over the course of India's six decades of statehood, the central government granted and removed authority to and from states resulting in a variety of development patterns among Indian states and across different periods of India's history. The cases presented here illustrate that when sub national groups with well-entrenched and capable governing institutions successfully lobbied the center for more authority, several developmental outcomes -- reducing insurgent violence, promoting economic growth, ... |
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| Building Composable Bridges Between the Conceptual Space and the Implementation Space |
21-May-2008 |
41 pages |
| Authors:
Paul Gustavson; Tram Chase; Matt Wilson; SIMVENTIONS INC FREDERICKSBURG VA
|
| Often the process and effort in building interoperable Command and Control (C2) systems and simulations can be arduous. Invariably the difficulty is in understanding what is intended. This paper introduces the notion of composable bridges as a means to help transition abstract ideas or concepts into concrete implementations. We examine the key elements to achieve composability, which include the direction provided by a process, the importance of a conceptual model, ... |
|
| Urban-Small Building Complex Environment: W07US Stability Analysis and Inter-Study Comparison, Volume AS-2 |
MAY 2008 |
54 pages |
| Authors:
Gail Vaucher; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM COMPUTATIONAL AND INFORMATION SCIENCE DIRECTORATE
|
| Urban atmospheric stability patterns impact military and civilian health, tools, operations, and planning. By identifying repeatable urban stability patterns, improvements to each of these impacted areas can be achieved. In this report, the White Sands Missile Range (WSMR) Urban Study research project is reviewed with a focus on stability characterization; specifically, the stable urban environment. Results from the WSMR 2007 Urban Study stability assessment are described and contrasted with the ... |
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| Evaluation of Holographic Technology in Close Air Support Mission Planning and Execution |
18-Mar-2008 |
47 pages |
| Authors:
Adam Smith; John J Martin; Mark Holzbach; Joseph Riegler; Chin-Ki Tam; ZEBRA IMAGING INC AUSTIN TX
|
| The Air Force Research Laboratory (AFRL) initiated BAA-05-04-HE with an objective to assess human performance in identifying patterns or subtle targets, comparing the effectiveness of 2D and 3D static visual stimuli based on identical example data sets. The research was tailored to the mission and task of the Joint Terminal Attack Controller (JTAC), and was a joint effort between AFRL/RHA in Mesa, AZ, its on-site support contractors (L-3 Communications and ... |
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| The National Security Strategy of the United Kingdom: Security in an Interdependent World |
01-Mar-2008 |
|
| Authors:
MINISTRY OF DEFENCE LONDON (UNITED KINGDOM)
|
| Providing security for the nation and for its citizens remains the most important responsibility of government. Since the end of the Cold War, the international landscape has been transformed. The opposition between two power blocs has been replaced by a more complex and unpredictable set of relationships. Economic trends, including more open global markets, and technological trends, particularly in communications, have strengthened the connections between individuals, businesses, societies and economies. ... |
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| An Analysis of Groundwater Flow Patterns in a Constructed Treatment Wetland Cell |
MAR 2008 |
104 pages |
| Authors:
Rebecca S. Corbin; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research effort analyzed groundwater flow paths within a treatment wetland constructed to degrade tetrachloroethylene (PCE) in groundwater. The treatment cell is a vertical flow wetland that allows the water to flow from the bottom to the surface breaking down PCE and daughter products. The method of conducting this research included collecting field data of hydraulic head contours nested piezometers and collecting data from sampling wells to determine hydraulic conductivities ... |
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| Dynamics of Marine Zooplankton: Social Behavior, Ecological Interactions, and Physically-Induced Variability |
FEB 2008 |
|
| Authors:
Ariane Verdy; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| Marine ecosystems reflect the physical structure of their environment and of the biological processes they carry out. This leads to spatial heterogeneity and temporal variability, some of which is imposed externally, and some of which emerges from the biological processes themselves. The main focus of this thesis is on the formation of spatial patterns in the distribution of zooplankton arising from social interactions between individuals. In the Southern Ocean, krill ... |
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| Trait Anxiety and Salivary Cortisol During Free Living and Military Stress |
Feb-2008 |
9 pages |
| Authors:
Jared P Reis; Marcus K Taylor; Kenneth P Sausen; Eric G Potterat; Genieleach A Padilla; Amanda E Markham; Sean P Drummond; Amanda E Miller; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Accumulating evidence suggests that negative affect is associated with elevated cortisol. Limited research has investigated this association in young, highly functioning, and stress-resilient populations. Methods: We examined the relation of trait anxiety with total and diurnal salivary cortisol during free-living conditions and during a stressful military exercise in 26 military men ages 19 -30 yr (M = 21.6, SD = 2.3). Salivary cortisol was assessed at five time points over ... |
|
| Morphological Analysis of Three Populations of Anopheles (Nyssorhynchus) Nuneztovari Gabaldon (Diptera: Culicidae) from Colombia |
Feb-2008 |
9 pages |
| Authors:
Mayury F Ramos; Ranulfo G Obando; Marco F Suarez; David Lopez; Richard Wilkerson; Maria A Sallum; UNIVERSIDAD DEL VALLE CALI (COLOMBIA)
|
| Based on the results of comparative analyses of 1,039 specimens of several progenies of Anopheles nuneztovari from three localities in Colombia, eight costal wing spot patterns were observed. Patterns I and III were the most frequent: 77.96% and 11.36%, respectively. Using the diagnostic characters ratio of the length of the basal dark area of hind tarsomere II/length of hind tarsomere II, ratio of the length of the humeral pale spot/length ... |
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| Biocompatible and Biomimetic Self Assembly of Functional Nanostructures |
17 JAN 2008 |
22 pages |
| Authors:
Jeffrey Brinker; NEW MEXICO UNIV ALBUQUERQUE DEPT OF CHEMICAL AND NUCLEAR ENGINEERING
|
| Immobilization of individual cells and collections of cells in well defined reproducible nano-to-microscale structures that allow structural and functional manipulation and interrogation is important for developing new classes of biotic/abiotic materials for establishing the relationship between genotype and phenotype and for elucidating responses to disease injury/stress or therapy - primary goals of biomedical research Although there has been considerable recent progress in investigating the response of cells to chemical or ... |
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| Nesting the Gulf of Mexico in Atlantic HYCOM: Oceanographic Processes Generated by Hurricane Ivan |
01-Jan-2008 |
21 pages |
| Authors:
Luis Zamudio; Patrick J Hogan; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The HYbrid Coordinate Ocean Model (HYCOM) has been configured for the Gulf of Mexico (GOM) at 1/250 horizontal grid resolution and has been nested inside a basin-scale 1/120 Atlantic version of HYCOM. The 1/250 nested GOM model is used to study temperature variations, current patterns, transport variations, and two coastal-trapped waves (CTWs) generated by Hurricane Ivan during mid September 2004. The model results indicate that the winds generated by Ivan: ... |
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| Structural Design of a NPS CubeSat Launcher |
01-Jan-2008 |
85 pages |
| Authors:
Felix Rossberg; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| To encourage student interest in space and education Stanford University and CalPoly developed the CubeSat. These picosatellites weigh about one kg and can be developed and built by students. NPS is designing CubeSats and a structure to deploy them in orbit as part of its emphasis on hands-on education This technical report deals with the development of a CubeSat Launcher (NPSCuL). NPSCuL will carry up to ten P-PODs built and ... |
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| Patterning of Bi2Te3 Polycrystalline Thin-Films on Silicon |
JAN 2008 |
18 pages |
| Authors:
Brian Morgan; Patrick Taylor; ARMY RESEARCH LAB ADELPHI MD
|
| Bi2Te3-based thermoelectric (TE) energy conversion devices are an attractive possibility for recovering usable energy from waste heat. The integration of TE devices on silicon substrates opens the door for new highly integrated systems where micro-electro-mechanical systems (MEMS) heat exchangers and sensor/actuator technology can be leveraged to improve conversion efficiency and system capability. One roadblock on this path is the development of reliable patterning methods for fabricating thin-film TE devices on ... |
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| Quantification of the Interacting Physical, Biological, Optical and Chemical Properties of Thin Layers in the Sea |
Jan-2008 |
10 pages |
| Authors:
Margaret A McManus; Mark T Stacey; John P Ryan; HAWAII UNIV AT MANOA HONOLULU DEPT OF OCEANOGRAPHY
|
| Our long-term goal is to develop the capability to predict thin layer formation and presence in the coastal ocean. The central focus of our research is to investigate: the spatial and temporal scales of thin layers, the relationship between physical processes (from the microscale to the mesoscale) and thin layers, as well as the difference between layered structures in the nearshore and offshore environments. The overarching goal of our research ... |
|
| Reflective Light Modulation by Cephalopods in Shallow Nearshore Habitats |
Jan-2008 |
|
| Authors:
Roger T Hanlon; MARINE BIOLOGICAL LAB WOODS HOLE MA
|
| The central question is: what are the optical principles upon which crypsis is achieved by opaque organisms in shallow, nearshore marine habitats? Camouflage mechanisms are not well known despite the general misconception that they are. Moreover, quantification of camouflage (especially of opaque organisms) is particularly wanting. We have three objectives: (1) Acquire imagery (camouflaged animals and their backgrounds) and corresponding irradiance data from coral reef and temperate rock reef environments. ... |
|
| Towards Link Characterization from Content |
Jan-2008 |
5 pages |
| Authors:
John Grothendieck; Allen Gorin; RUTGERS - THE STATE UNIV PISCATAWAY NJ
|
| In processing large volumes of speech and language data, we are often interested in the distribution of languages, speakers, topics, etc. For large data sets, these distributions are typically estimated at a given point in time using pattern classification technology. Such estimates can be highly biased, especially for rare classes. While these biases have been addressed in some applications, they have thus far been ignored in the speech and language ... |
|
| Spatial Memory Guides Task Resumption |
2008 |
19 pages |
| Authors:
Raj M. Ratwani; J. G. Trafton; NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR APPLIED RESEARCH IN ARTIFICIAL INTELLIGENCE
|
| Previous research examining how people resume a task following an interruption has focused primarily on pure memory processes. In this paper, we focus on the perceptual processes underlying task resumption and show that spatial memory guides task resumption. In Experiment 1, fixation patterns suggest participants were able to resume remarkably close to where they were in the task prior to interruption. In Experiment 2, a spatial interruption disrupted resumption performance ... |
|
| Characterizing Patterns of MILCON Project Contract Modifications |
01-Dec-2007 |
96 pages |
| Authors:
Tyler K Nielsen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Change orders are used by project managers of construction projects to account for unplanned for events. This may include everything from weather events to last minute changes requested by the user. This effort analyzes data from the U.S. Air Force military construction program to find the major causes of change orders. The data is also analyzed to find trends over time, by construction agent, and by major command to detect ... |
|
| Fractional Factorial Controlled Sequential Bifurcation: Efficient Factor Screening Through Divide and Discard |
DEC 2007 |
112 pages |
| Authors:
Regine P. Oh; NAVAL POSTGRADUATE SCHOOL CENTER FOR DEFENSE TECHNOLOGY AND EDUCATION FOR THE MILITARY SERVICES MONTEREY CA
|
| On any given day, organizations use software simulations to make better decisions. Software simulations of real world systems are often large and rich with many parameters potentially affecting outcomes. Faced with a multitude of parameters, decision makers may not know or may lose sight of the few truly critical factors. Thus, screening algorithms are essential in order to identify the factors that most impact outcome measures. This enables experimenters to ... |
|
| Analysis of Recruit Attrition from the Navy's Delayed Entry Program and Recruit Training Command |
DEC 2007 |
323 pages |
| Authors:
Jon K. Neuhalfen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis analyzes demographic and assignment factors associated with recruit attrition from the U.S. Navy's Delayed Entry Program (DEP) and Recruit Training Command (RTC). These factors include education credentials, enlistment program, and women in traditional ratings. The Navy currently screens applicants using three qualification "tiers" based on education credentials. Armed Forces Qualification Test (AFQT) scores are cross-referenced with education tier to create the Navy's Recruit Quality Matrix, which determines enlistment ... |
|
| First Principles Modeling of Segregation of Nd to YAG Grain Boundarie |
15 NOV 2007 |
17 pages |
| Authors:
Vijay Kumar; VIJAY KUMAR FOUNDATION CHENNAI (INDIA)
|
| Calculations show that Nd doping in bulk is endothermic and it agrees with experiments which show that only a very small amount can be added in bulk. However, there is a large segregation energy on surface and Nd doping is energetically favorable. An interesting finding is that Al replacement by Nd at the surface is highly exothermic. We expect similar trends on grain boundaries though segregation energies will be lower. ... |
|
| Long-Term Clock Behavior of GPS IIR Satellites |
01-Nov-2007 |
|
| Authors:
Marvin Epstein; Todd Dass; John Rajan; Paul Gilmour; ITT CORP CLIFTON NJ SPACE SYSTEMS DIV
|
| The ITT-developed GPS IIR satellite payloads have been on orbit since 1997, and have proven to be the best family of clocks in the GPS constellation. At this time, there is a substantial recorded history of clock behavior, including over 60 clock years of space operation. The age of the oldest clock is over 9 years. A review of the record shows a number of significant characteristics that were not ... |
|
| Marine Mammal Acoustic Monitoring and Habitat Investigation, Southern California Offshore Region |
NOV 2007 |
42 pages |
| Authors:
John Hildebrand; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY
|
| The echolocation clicks of five dolphin species found off southern California are described and the use of clicks for species classification is investigated. Spectral and temporal properties are analyzed for the echolocation clicks from short-beaked common, long-beaked common, Risso's, Pacific white-sided and bottlenose dolphins. Two of the species exhibit unique spectral peaks and notches when the complete click is analyzed. A nested ANOVA analysis indicates that spectral peaks and notches ... |
|
| Predicting Future Training Opportunities Using the Land-Use Evolution and Impact Assessment Model |
OCT 2007 |
63 pages |
| Authors:
James D. Westervelt; Sarah B. Nemeth; Michael J. White; Michael R. Kemme; Dawn A. Morrison; Christa Eastgate; Mark Ginsberg; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
|
| The future training/testing capacities of military installations and their surrounding regions are increasingly based on today's smart regional planning in collaboration with surrounding cities, counties, and states. Developing urban patterns around installations can be steered in a manner that ensures the continued viability of the installation to support present and future missions. Researchers have developed a two-step process to link proposed regional plans to future training/testing opportunities. The first step ... |
|
| Understanding Recent Variability in the Arctic Sea Ice Cover -- Synthesis of Model Results and Observations |
SEP 2007 |
83 pages |
| Authors:
John Whelan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis provides a continuation of the analysis of the diminishing sea ice trend in the Arctic Ocean by examining results from the NPS 1/12 degree pan-Arctic coupled ice-ocean model. While many previous studies have analyzed changes in ice extent and concentration, this research focuses on ice thickness as it gives a better representation of ice volume variability. The skill of the model is examined by comparing its ice thickness ... |
|
| Direct Numerical Simulations of the Diffusive Convection and Assessment of Its Impact on Artic Climate Change |
SEP 2007 |
81 pages |
| Authors:
Ivo J. Prikasky; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis focuses on the numerical modeling of the oceanic double-diffusive convection, a mixing process which is driven by the two orders of magnitude difference in diffusivities of heat and salt in seawater. This study explores the diffusive regime of double-diffusion. The aim of the research is to quantify the double-diffusive transport in both smooth gradients and thermohaline staircases, and to develop clear insight into the origin of the staircases ... |
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| Lagrangian Observations of Rip Currents |
SEP 2007 |
59 pages |
| Authors:
Jonathan D. Morrison; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| A comprehensive field rip-current experiment (RCEX) was conducted from 14 April to 18 May 2007 in Sand City, California, on Monterey Bay. Lagrangian observations were made with inexpensive ($150), handheld, Differential Global Positioning Systems (DGPS) mounted on surf zone drifters. The inexpensive DGPS requires post-processing to achieve O(0.4m) position accuracy and O(0.01m/s) velocity accuracy. Thirty drifters were constructed and deployed in well-developed, rip-currents to map the circulation patterns for the ... |
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