| Health of Women after Wartime Deployments: Correlates of Risk for Selected Medical Conditions among Females after Initial and Repeat Deployments to Afghanistan and Iraq, Active Component, U.S. Armed Forces |
Jul 2012 |
11 pages |
| Authors:
ARMED FORCES HEALTH SURVEILLANCE CENTER SILVER SPRING MD
|
 | Women account for approximately 10 percent of all U.S. military deployers to Afghanistan and Iraq. This analysis estimates the percentages of female deployers (n=154,548) who were affected by selected illnesses and injuries after first through third deployments to Iraq/Afghanistan in relation to age group, service branch, military occupation, marital status, pre-deployment medical history, ?dwell time? prior to 2nd and 3rd deployments, and length of deployment. Of these factors, diagnosis of ... |
|
| Comparision of High Energy Laser Expected Dwell Times and Probability of Kill for Mission Planning Scenarios in Actual and Standard Atmospheres |
Mar 2012 |
131 pages |
| Authors:
Jarred L Burley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The 1976 U.S. standard atmosphere, a 50th percentile climatological profile, a ground observation based profile, and 48, 24, and 12 hour GFS forecast derived profiles are compared to actual sounding data and characterized for meteorological parameter predictive performance. Predictive HEL engagement performance is analyzed through AFIT/CDEs HELTDA for relevant engagement scenarios for multiple wavelengths. Operational optimization is demonstrated utilizing GFS forecast predictions in nearly all cases. Ground observation-based profiles prove ... |
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| An Analysis of Turnover Intentions: A Reexamination of Air Force Civil Engineering Company Grade Officers |
Mar 2012 |
124 pages |
| Authors:
Joshua D Connell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| A potential retention problem is facing company grade officers (CGOs) in the Air Force Civil Engineer (CE) career field. This is due to the stress caused by a demanding workload experienced during a prolonged period of conflict (Iraq and Afghanistan), which is compounded by a reduction in force. The possibility of reduced retention is thus a concern for CE leadership. Based on past research, and the prior study conducted by ... |
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| Effect of Dwell Time on the Mental Health of U.S. Military Personnel with Multiple Combat Tours |
Jan 2012 |
7 pages |
| Authors:
Andrew J MacGregor; Peggy P Han; Amber L Dougherty; Michael R Galarneau; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Background: Operation Iraqi Freedom (OIF) required the use of military personnel for multiple combat deployments. Dwell time, or the period between deployments, may confer a protective effect against deployment-related mental health disorders, such as posttraumatic stress disorder (PTSD). Methods: U.S. Marine Corps personnel who deployed in support of OIF once and twice were identified from electronic military deployment records. New-onset mental health diagnoses (ICD-9-CM 290?319), including PTSD, were identified from ... |
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| Oxygenation-Enhanced Radiation Therapy of Breast Tumors |
Nov 2011 |
29 pages |
| Authors:
Mikhail Skliar; UTAH UNIV SALT LAKE CITY
|
| The treatment of locoregional breast cancer has evolved from radical mastectomy to targeted local therapy with breast conservation. The efficacy of conserving treatments of breast cancers is impeded by tumor hypoxia, which affects 50% of locally advanced breast tumors. Poor oxygenation of hypoxic tumors reduces their sensitivity to X-ray and -radiation, which requires a high radiation dose for efficacy compared to normally oxygenated tissues. This Concept project provides initial investigation ... |
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| ARFORGEN BOG: Dwell Simulation |
11 JUL 2011 |
40 pages |
| Authors:
DAVID HUGHES; Mark Zais; Paul Kucik; Fernando Huerta; MILITARY ACADEMY WEST POINT NY OPERATIONS RESEARCH CENTER
|
| The Army refers to the time a Soldier spends deployed overseas in a combat environment as Boots on the Ground time, or BOG. Conversely, the time a Soldier spends between deployments is known as "dwell." This BOG:Dwell ratio is an important, highly visible statistic, that serves as a leading indicator of recruiting, retention, and morale issues for the Army, its Soldiers, and their families. The Army's G1's Strength Analysis and ... |
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| Frequency and Hold-Time Effects on Durability of Melt-Infiltrated SiC/SiC (Preprint) |
Jul 2011 |
11 pages |
| Authors:
R John; G Ojard; R Miller; Y Gowayed; G Morscher; U Santhosh; J Ahmad; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIR METALS CERAMICS AND NONDESTRUCTIVE EVALUATION DIV/METALS BRANCH
|
| With the growing interest in ceramic matrix composites for multiple applications, the response of the material to service conditions needs to be understood. A range of durability assessment was undertaken on Melt Infiltrated (MI) SiC/SiC Ceramic Matrix Composite. MI SiC/SiC was tested under 30 Hz fatigue, 1 Hz fatigue, dwell fatigue (2 hour hold cycle) and creep loading. The applied stresses ranged from the micro-cracking initiation point to well above ... |
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| An Analysis of U.S. Navy Humanitarian Assistance and Disaster Relief Operations |
01 JUN 2011 |
120 pages |
| Authors:
Cullen M. Greenfield; Cameron A. Ingram; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
|
| This project investigates the response of the U.S. Navy (USN) and Military Sealift Command (MSC) to different types of natural disasters and identifies the types of assets deployed as well as the dwell times for those assets. Using the recent history of USN humanitarian assistance and disaster relief (HADR) operations, we explore opportunities to shape the fleet force structure to adapt to the increased mission importance of HADR operations, and ... |
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| Weight Changes Among Male Navy Personnel Deployed to Iraq or Kuwait in 2005-2008 |
May 2011 |
10 pages |
| Authors:
Caroline A Macera; Hilary Aralis; Andrew MacGregor; Mitchell J Rauh; Kevin Heltemes; Peggy Han; Michael R Galarneau; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| The study objective was to identify changes in weight that occurred during deployment to Iraq or Kuwait between 2005 and 2008 among male Navy personnel. Data on length and type of deployment was combined with weight measurements from the Physical Readiness Information Management System. Weight measurements pre- and post-deployment were available for 10,886 men who did not exceed weight recommendations predeployment. For men deploying twice, complete weight measurements were available ... |
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| The High Cost of Serving in the Army Reserve |
24 MAR 2011 |
32 pages |
| Authors:
Sherry McCloud; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Since 9/11 the Army Reserve has been challenged to transform from a strategic force to an operational force that is constantly deploying some portion of its units and individuals. Reservists are no longer known as the weekend warriors who serve actively two weeks in the summer. Over time, the frequency of Reserve deployments and the time between deployments, or dwell time, has become a point of deep concern both in ... |
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| Interface Defeat of Long Rods Impacting Oblique Silicon Carbide |
Feb 2011 |
140 pages |
| Authors:
Jr Anderson Charles E; Thilo Behner; Timothy J Holmquist; Nikki L King; Dennis L Orphal; SOUTHWEST RESEARCH INST SAN ANTONIO TX
|
| Test data for gold rods impacting unconfined silicon carbide targets are reported. This work focuses on the dwell phenomenon exhibited by silicon carbide for targets at obliquity. Experiments are presented for obliquities of 30 deg, 45 deg and 60 deg, with and without cover plates. Results are compared to normal impact. |
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| AH-64D Apache Longbow/Video from UAS for Interoperability Teaming Level II (VUIT-2) Aircrew Workload Assessment |
Apr-2009 |
80 pages |
| Authors:
Jamison S Hicks; David B Durbin; Brian Sperling; PROGRAM MANAGEMENT OFFICE AH-64D APACHE LONGBOW REDSTONE ARSENAL AL
|
| An AH-64D/Unmanned Aerial System (UAS) aircrew workload assessment was conducted during February 2008 in Huntsville, AL. The purpose of the assessment was to evaluate AH-64D aircrew workload during UAS level II interoperability under simulated mission conditions. The workload assessment consisted of operational missions conducted by aircrews (eight pilots) in an AH-64D simulator. Pilot workload, situational awareness (SA), crew coordination, crewstation interface, switch actuations, simulator sickness, visual gaze and dwell times ... |
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| Was the Surge Strategy Right? |
12-Mar-2009 |
28 pages |
| Authors:
Bruce Antonia; ARMY WAR COLL CARLISLE BARRACKS PA
|
| The decrease in violence and the recent successes enjoyed in Operation Iraqi Freedom are presumably due to the surge strategy that was implemented by the Department of Defense. This research project examines whether or not the increase in American Soldiers in Iraq was actually needed. The author argues that the Sons of Iraq program (or Sahwa) was the major contributing factor to the successes in Iraq (along with other parts ... |
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| AH-64D Apache Longbow Aircrew Workload Assessment for Unmanned Aerial System (UAS) Employment |
Jan-2009 |
76 pages |
| Authors:
David B Durbin; Jamison S Hicks; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| This study assessed whether workload was tolerable for AH-64D pilots when they employed an unmanned aerial system (UAS) during simulated missions. Ten AH-64D pilots participated in the study. Pilot workload, situation awareness, crew coordination, crewstation interface, switch actuations, simulator sickness, visual gaze and dwell times (using a head-eye tracker), audio-video, and tactics, techniques and procedures data were collected and analyzed. Pilot workload was found to be tolerable for the tasks ... |
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| Mean vs. Life-Limiting Fatigue Behavior of a Nickel-Based Superalloy (Postprint) |
Sep-2008 |
10 pages |
| Authors:
S K Jha; J M Larsen; M J Caton; UNIVERSAL TECHNOLOGY CORP DAYTON OH
|
| The mean and the life-limiting behavior under fatigue of the nickel-based superalloy, IN100, separated (or converged) as a function of stress level and dwell loading. This behavior was related to the control of the life-limiting behavior by the small-crack growth regime, producing its much slower response to stress level and dwell-time, relative to the mean-lifetime behavior. The lifetime probability density is therefore, modeled as a superposition of the crack growth ... |
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| Projecting Pyongyang: The Future of North Korea's Kim Jong IL Regime |
MAR 2008 |
58 pages |
| Authors:
Andrew Scobell; ARMY WAR COLL STRATEGIC STUDIES INST CARLISLE BARRACKS PA
|
| This monograph considers the future trajectory of the Pyongyang regime and explores a range of future scenarios. It does not consider the future of North Korea as a geographic or territorial entity. Some analysts and observers discuss the future without clarifying whether they are discussing the country of North Korea or the Pyongyang regime. In this monograph, the focus is on the fate of the regime dominated by the Kim ... |
|
| Assessing Capabilities of the High Energy Liquid Laser Area Defense System through Combat Simulations |
Mar-2008 |
104 pages |
| Authors:
Ryan S Ponack; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| High Energy Laser (HEL) technology continues to improve and its place in the battlefield is ever evolving. By combining the high energy delivery of solid state laser technology with the efficient thermal management of liquid laser technology, HELLADS has two main advantages over any HEL predecessors. One, the configuration is small and light enough to be carried on more tactical aircraft such as fighters. Two, the thermal management greatly increases ... |
|
| Stress on the Force: Measuring the Impact of Increased Operational Deployments Using Manpower Metrics |
Jan-2008 |
32 pages |
| Authors:
Robert J Guice; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| Accurate deployment data, when correlated with manpower metrics such as divorce, separation, and suicide rates, can provide a representative assessment of stress on the force. The United States Marine Corps (USMC) is involved in a conflict that can potentially last a generation. Given this level of operational commitment, the Marine Corps is sensitive to the ramifications, both long- and short-term, of increased operational tempo. The negative ramifications are commonly referred ... |
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| Recruiting Implications of the Long War for the Marine Corps |
Jan-2008 |
36 pages |
| Authors:
Walker M Field; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| The Marine Corps is facing tremendous challenges in meeting global commitments and sustaining a proper force dwell time while remaining postured as America's 911 force. To this end, President Bush approved a proposal to increase personnel in the Marine Corps over the next 5 years to an end-strength goal of 202,000 Marines. Faced with the reality of a long war and the absence of a draft, the Marine Corps must ... |
|
| Learning to Orient Using a Map Display: Evidence from Eye Tracking |
Jan-2008 |
5 pages |
| Authors:
Glenn Gunzelmann; Scott Douglass; Peter Khooshabeh; AIR FORCE RESEARCH LAB MESA AZ HUMAN EFFECTIVENESS DIRECTORATE COGNITIVE MODELS AND AGENTS BRANCH
|
| Eight individuals participated in an experiment requiring them to identify the position of a viewer on a map given the viewer's egocentric perspective of the space. Performance data indicated that response times decreased significantly over the course of the experiment, but accuracy did not improve. An analysis of eye tracking data showed that the speedup in participant performance was primarily a reflection of participants shifting attention between the two perspectives ... |
|
| Tensile Creep and Fatigue of Sylramic-iBN Melt-Infiltrated SiC Matrix Composites: Retained Properties, Damage Development, and Failure Mechanisms (Preprint) |
Oct-2007 |
32 pages |
| Authors:
Gregory N Morscher; Greg Ojard; Robert Miller; Yasser Gowayed; Unni Santhosh; Jalees Ahmed; Reji John; PRATT AND WHITNEY EAST HARTFORD CT
|
| The elevated temperature creep, fatigue, rupture, and retained properties of ceramic matrix composites envisioned for use in gas turbine engine applications are essential properties to understand and model for the purposes of component design and life-prediction. In order to quantify the effect of stress, time, temperature, and oxidation for a state-of-the-art composite system: the Sylramic-iBN woven fiberreinforced, BN interphase, melt-infiltrated SiC matrix composite, a wide variety of tensile creep, dwell ... |
|
| Defense Science Board Task Force on Deployment of Members of the National Guard and Reserve in the Global War on Terrorism |
SEP 2007 |
54 pages |
| Authors:
DEFENSE SCIENCE BOARD WASHINGTON DC
|
| Use of the components in support of overseas contingencies has increased significantly since September 11, 2001 and the U.S. invasion of Afghanistan and Iraq. Although the number of reserve component members on active duty has declined over the past few years, from a peak in May 2003, the current level still remains far higher than in decades past. This level of effort is expected to continue as long as the ... |
|
| Fit to Fight Is Post Traumatic Stress Decreasing our Readiness |
03-Mar-2007 |
32 pages |
| Authors:
Charles Honore; TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY
|
| This paper examines the Operational Tempo (OPTEMPO) of US forces since Operations Iraqi Freedom and Enduring Freedom. By reviewing historical documentation and troop surveys, it discusses stress impacts to soldiers and family members, including domestic violence, divorce rate trends, and suicide statistics. Finally, the paper examines policies and procedures necessary to effectively manage deployment times, durations to minimize post traumatic stress, and propose recommended changes. Concerns which impact the problem ... |
|
| Time-Dependent Response of MI SiC/SiC Composites. Part 2: Samples with Holes |
JAN 2007 |
10 pages |
| Authors:
G. Ojard; R. Miller; Y. Gowayed; J. Chen; U. Santhosh; J. Ahmad; R. John; PRATT AND WHITNEY EAST HARTFORD CT
|
| Time-dependent response of samples with holes manufactured from MI SiC/SiC composites (01/01 material) was experimentally evaluated under creep and dwell fatigue loading. Forty specimens with a central hole with sizes 2.286, 4.572 and 6.35 mm were tested. All specimens showed primary and steady state creep responses. Environmental degradation was empirically related to material response at different stress levels utilizing information from samples without holes. ANSYS Finite Element Analysis was used ... |
|
| Unmanned Vehicles for U.S. Naval Forces: Background and Issues for Congress |
25 OCT 2006 |
|
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | Unmanned vehicles (UVs) are viewed as a key component of U.S. defense transformation. Perhaps uniquely among the military departments, the Department of the Navy (DON), which includes the Navy and Marine Corps, may eventually acquire every major kind of UV, including unmanned air vehicles (UAVs), unmanned combat air vehicles (or UCAVs, which are UAVs armed with weapons), unmanned surface vehicles (USVs), unmanned underwater vehicles (UUVs), and unmanned ground vehicles (UGVs). ... |
|
| Stress Coatings for Large Scale Membrane Mirrors (preprint) |
15 SEP 2006 |
20 pages |
| Authors:
Ryan Conk; J. D. Moore; B. G. Patrick; D. Marker; B. deBlonk; SRS TECHNOLOGIES VANDERBERG AFB CA
|
| Finite element modeling and design need further adjustments, but have shown good correlation through successful results and actuator influence. Active boundary control effective in correcting mounting errors and other types of low order aberrations typically seen in membrane applications. Spherical aberration can be controlled (as required) thought varied stress coatings on the membrane. Improvements must be made to ensure no increase in surface roughness of membrane. Deposition rate and dwell ... |
|
| Unmanned Vehicles for U.S. Naval Forces: Background and Issues for Congress |
26 JUL 2006 |
|
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| Unmanned vehicles (UVs) are viewed as a key component of U.S. defense transformation. Perhaps uniquely among the military departments, the Department of the Navy (DON), which includes the Navy and Marine Corps, may eventually acquire every major kind of UV, including unmanned air vehicles (UAVs), unmanned combat air vehicles (or UCAVs, which are UAVs armed with weapons), unmanned surface vehicles (USVs), unmanned underwater vehicles (UUVs), and unmanned ground vehicles (UGVs). ... |
|
| Unmanned Vehicles for U.S. Naval Forces: Background and Issues for Congress |
31 MAY 2006 |
|
| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| Unmanned vehicles (UVs) are viewed as a key component of U.S. defense transformation. Recent U.S. military operations have highlighted the potential of UVs to significantly improve and reshape U.S. military capabilities. Perhaps uniquely among the military departments, the Department of the Navy (DON), which includes the Navy and Marine Corps, may eventually acquire every major kind of UV, including unmanned air vehicles (UAVs), unmanned combat air vehicles (or UCAVs, which ... |
|
| Comparison of Climatological Optical Turbulence Profiles to Standard, Statistical and Numerical Models Using Heleeos |
MAR 2006 |
117 pages |
| Authors:
Liesebet E. Gravley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Optical turbulence within earth's atmosphere plays a significant role in electromagnetic radiation propagation from a high energy laser. The index of refraction structure constant, Cn2, characterizes turbulent spatial fluctuations due to temperature gradients. These changes in the index of refraction affect the intensity of the laser wave front on its intended target. It is important to characterize this parameter throughout the atmosphere, the boundary layer and above, for its applications ... |
|
| The Use of Agent Based Simulation for Cooperative Sensing of the Battlefield |
DEC 2005 |
121 pages |
| Authors:
Lawrence A. Liang; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH
|
| Many military Intelligence Surveillance and Reconnaissance (ISR) operations would benefit greatly from a fleet of disparate sensor-bearing UAVs that are tightly integrated via a communications network work cooperatively for a common operational objective enhance situation awareness of the areas of operation and increase persistence of sensor dwell time on strategic targets. This would enable continuity in the entire target acquisition cycle from detection to classification to identification and finally localization ... |
|
| Optimum Wavelength and Power for Efficient Laser Propagation in Various Atmospheric Environments |
25 OCT 2005 |
44 pages |
| Authors:
Phillip Sprangle; Joseph Penano; Bahman Hafizi; NAVAL RESEARCH LAB WASHINGTON DC
|
| This paper discusses the optimum laser wavelength and power for efficient propagation in maritime, desert, rural, and urban atmospheric environments. The theoretical/numerical model used in this study includes the effects of aerosol and molecular scattering, aerosol heating and vaporization, thermal blooming due to aerosol and molecular absorption, atmospheric turbulence and beam quality. These processes are modeled in a fully three-dimensional and time-dependent manner. It is found that aerosols, which consist ... |
|
| Orbit Determination of Highly Eccentric Orbits using a RAVEN Telescope |
SEP 2005 |
51 pages |
| Authors:
Michael L. Thrall; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| For the past eight years, the small automated telescope Raven has been tested in detecting and tracking deep space objects. As the Raven has proven successful in tracking this regular and predictable orbit, its one arc-second accuracy made it a perfect candidate to attempt to accurately track the less predictable Highly Eccentric Orbit (HEO) objects. Ranging data was obtained from the Sirius satellite radio company for the Sirius3 satellite (Satellite ... |
|
| Instrument Scan Strategies of F-117A Pilots |
FEB 2002 |
16 pages |
| Authors:
David L. Brown; Holly S. Bautsch; Paul A. Wetzel; Gretchen M. Anderson; LOGICON TECHNICAL SERVICES INC DAYTON OH
|
| Eye tracking is an accurate and objective means of measuring an instrument scan pattern. The purpose of this study was to determine if prior aircraft experience, phase of flight, and autopilot mode modulated the instrument scan pattern of F-117A pilots. Twenty-three F-117A pilots, grouped by prior experience, flew an instrument approach manually and with autopilot while wearing and El Mar eye tracker in the F-117A simulator at Holloman AFB NM. ... |
|
| The Impact of a Petroleum-Based Corrosion Inhibitor (PBCI) on a Two- Component Solventborne Chemical Agent Resistant Coating (CARC) |
AUG 2001 |
|
| Authors:
Brian E. Placzankis; John A. Escarsega; Chirs E. Miller; William S. Lum; Raymond E. Hinxman; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Test specimens of steel, aluminum armor, and fiberglass composite representative of materials used in U.S. Army systems were coated using Chemical Agent Resistant Coating (CARC) (U.S. Department of Defense. Chemical Agent Resistant Coating CARC system Application Procedures and Quality Control Inspection. MIL-C-53072, Washington, DC, 1992). The CARC primer MIL-P-53022 (U. S. Department of Defense. Primer, Epoxy Coating, Corrosion Inhibiting Lead and Chromate Free. MIL-P-53O22-10, Washington, DC, 1992) and the two-part ... |
|
| Tagging of Breast Tumors for Excision and Specimen Radiography and of Sentinel Nodes for Ultrasound-Guided Localization Using Novel Particulate Agents |
AUG 2000 |
13 pages |
| Authors:
Robert F. Mattrey; CALIFORNIA UNIV SAN DIEGO LA JOLLA
|
| Year 1, we identified a radiopaque tumor-marking agent and optimized the dose. This year we worked on coloring that agent and sentinel node detection. We could not color the radiopaque perfluorocarbon (PFC) emulsion, but successfully suspended India Ink within it. The optimum dose was then injected in tumors. We followed the black tract to locate/remove the tumor at 72-hours. The resected specimen was then radiographed. We worked on sentinel node ... |
|
| How Is U.S. Space Power Jeopardized By An Adversary's Exploitation, Technological Developments, Employment and Engagement of Laser Antisatellite Weapons? |
APR 2000 |
63 pages |
| Authors:
Thomas A. Summers; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
|
| This research project discusses how an adversary's exploitation, technological developments, employment and engagement of laser antisatellite (ASAT) weapons may negatively impact the US ability to use space power to enhance terrestrial warfighting capability. After describing some exploitable, attractive laser weapon characteristics, the paper explains some laser lethality factors relating several key laser weapon parameters, such as range, pointing jitter, atmospheric attenuation, dwell time and target coupling. How ground-, air- and ... |
|
| Hypersonic Weapons Technology for the Time Critical Mobile Ground ThreatA State-of-the-Art Review |
JAN 1999 |
|
| Authors:
Mitchel Douglas; John Lindgren; DEFENSE MODELING SIMULATION AND TACTICAL TECHNOLOGY INFORMATION ANALYSIS CENTER HUNTSVILLE AL
|
| As a result of growing concern about threat time critical or mobile targets (TCMT), the Department of Defense (DoD) has recognized the need for ability to place TCMT, with 1 to 15 minute (or less) dwell times, at risk from surface, subsurface, subsurface and/or airborne platforms. This requires the need for a hypersonic weapons capability to deliver lethal payloads at standoff ranges. This document is ... |
|
| Tradeoff Between Dwell Time and Frequency of Revisits of Sensors |
AUG 1998 |
39 pages |
| Authors:
Don Barr; MILITARY ACADEMY WEST POINT NY OPERATIONS RESEARCH CENTER
|
| The Department of Defense has expressed heightened interest in managing information processes related to combat operations. This has highlighted the analytic community's need for information-related analysis methods, which begs the question of how to measure combat information. One measure, called "information gain", has been developed and applied at the U.S. Military Academy in recent years. Information gain is based on modeling a tactical ... |
|
| Human Factors Technical Writer's Guide |
JUN 1998 |
87 pages |
| Authors:
Michael D. Snyder; David J. Bryant; Jean Dunn; Earl S. Stein; FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ
|
| The Program Directorate for Aviation Simulation and Human Factors (ACT-500) of the Federal Aviation Administration William J. Hughes Technical Center determined that there should be a standardized method to create technical documents. The Human Factors Branch (ACT-530) was tasked to develop this document. They decided that standardizing technical documents should not only dwell on developing the document but teaching basic writing techniques to make all ... |
|
| Short Segment Data Base |
AUG 96 |
29 pages |
| Authors:
R. Lay; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The objective of this project was to construct the Short Segment Data Base, a data base of short speech segments with various dwell times and various periods. This was accomplished by switching a receiver back and forth between an occupied and an unoccupied frequency. There must be no audio signal present when the receiver is tuned to the unoccupied frequency. This switching technique simulates a scanning receiver recording the audio ... |
|
| Early Detection of Breast Cancer on Mammograms Using: Perceptual Feedback, Computer Processed Images and Ultrasound |
APR 1996 |
35 pages |
| Authors:
Peter Bloch; PENNSYLVANIA UNIV PHILADELPHIA
|
| Several approaches for impraving the detection of small tumors m the breast9 were explored. These included; (1) Perceptual feedback to decrease errors in missing tumors that are actually visible on the initial screening mammogram. The observers head-eye-position was recorded while viewing mammograms. It was found that false negative decisions in identifying a lesion was associated with prolonged dwell time. Visual feedback, obtained by placing a small circle on the image ... |
|
| Early Detection of Breast Cancer on Mammograms Using: Perceptual Feedback, Computer Processed Images and Ultrasound |
JAN 96 |
163 pages |
| Authors:
Peter Bloch; PENNSYLVANIA UNIV PHILADELPHIA
|
| Several approaches for improving the detection of small tumors in the breast were explored. These included: (1) Perceptual feedback to decrease errors in missing tumors that are actually visible on the initial screening mammogram. The observers head-eye-position was recorded while viewing mammograms. It was found that false negative decisions in identifying a lesion was associated with prolong dwell time. Visual feedback, obtained by placing a small circle on the image ... |
|
| Preliminary Analysis of Vertical-Motion Detection for Low-Elevation Targets with Doppler Processing at W-Band |
OCT 95 |
41 pages |
| Authors:
G. W. Groves; J. E. Conte; W. D. Blair; NAVAL SURFACE WARFARE CENTER DAHLGREN DIV VA
|
| The detection of vertical motion of a low-elevation target in multipath by frequency analysis using millimeter waves such as W-band radar is considered. Target vertical motion can be detected if the range rate of the image differs sufficiently from that of the target itself, so that their Doppler shifts allow resolution of the target return from its image. This observed difference in frequency provides additional information on target position and ... |
|
| An Azimuth Measurement Algorithm for Mechanically Rotating Pulse Doppler Radars |
15 JUN 95 |
13 pages |
| Authors:
Gregory Tavik; Ben Cantrell; NAVAL RESEARCH LAB WASHINGTON DC
|
| For a mechanically rotating pulse Doppler radar having only a single main beam, an algorithm is presented that obtains an estimate of a target's azimuth angle using echo data obtained over a single coherent dwell. By removing the clutter and then cross-correlating the target echoes with a stored replica of the antenna pattern, azimuth angle measurement accuracies can be obtained within a fraction of a beamwidth. A Monte Carlo simulation ... |
|
| Early Detection of Breast Cancer on Mammograms Using: Perceptual Feedback, Computer Processed Images and Ultrasound |
01 JAN 94 |
28 pages |
| Authors:
Peter Bloch; PENNSYLVANIA UNIV PHILADELPHIA
|
| Three approaches are being explored for improving the detection of small tumors in the breast: (1) Perceptual feedback to decrease errors in missing tumors that are actually visible on the initial screening mammograms. The observers head-eye-position is recorded while viewing mammograms and the gaze where the eye-position dwell time is concentrated, will be feedback to the observer. The reduction in the number of incorrect decisions with biofeedback is being studied. ... |
|
| Parallel Search for a Conjunction of Shape and Contrast Polarity |
94 |
15 pages |
| Authors:
J. Theeuwes; F. L. Kooi; HOOFDGROEP MAATSCHAPPELIJKE TECHNOLOGIE TNO DELFT (NETHERLANDS)
|
| When a target object embedded in an array of other objects can be distinguished along a single feature dimension (e.g., colour or shape), it can be detected in parallel. When a target object is defined by a conjunction of stimulus features, search has to be conducted serially, indicating that the visual system is incapable of conducting a parallel search over two stimulus dimensions simultaneously. Earlier research has shown that there ... |
|
| Target Detection Via Kalman Filtering |
MAR 93 |
83 pages |
| Authors:
Gary A. Sipe; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| A simple, time domain method is used to analyze moderate to high PRF radar signals. The quantities of interest are the signal's PRF, SNR, and time of arrival. The time of arrival problem is important because it can be used, with multiple sensors, to determine the position of the emitting target. An algorithm is described which will produce these values using Kalman filtering. Individual pulses in a pulsed type radar ... |
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| Target Scheduling for Directed Energy Weapon Platforms |
JAN 1993 |
175 pages |
| Authors:
G. C. Corynen; CALIFORNIA UNIV LIVERMORE RADIATION LAB
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| This final report documents the results of a three-year technology development program sponsored by the Rome Laboratory (RL) as part of the Strategic Defense Initiative (SDI) and executed at the Lawrence Livermore National Laboratory (LLNL). The major objectives of this program were to develop, test, and deliver algorithms for managing Directed Energy Weapons (DEW) platforms during defensive engagements with a number of offensive weapons, which we shall call the targets. ... |
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| Formation of Submicrometer Carbonaceous Islands during SEM Examination of Thin GaAs Layers on Si Substrates, |
22 MAY 1992 |
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| Authors:
G. W. Turner; P. M. Nitishin; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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| In the course of investigating the initial stages of GaAs growth on Si substrates by molecular beam epitaxy (MBE), we have discovered an electron-beam-induced growth process that can occur during scanning electron microscope (SEM) examination of samples with a sufficiently thin deposit of GaAs. When such a sample is transferred from the MBE system to the SEM with only a brief exposure to air, a circular island forms at any ... |
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| Proceedings of Damping '91, Held in San Diego, California on 13 - 15 February 1991. Volume 3 |
AUG 91 |
517 pages |
| Authors:
WRIGHT LAB WRIGHT-PATTERSON AFB OH
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| Partial contents: Damping identifications--Identification techniques for damped distributed structural systems using the method of collocation, Correlation techniques to determine model form in robust nonlinear system realization identification, System level design and analysis of truss structures damped by viscous struts, Damping ratio estimates from autocorrelation functions, Damping materials--Passive vibration damping with noncohesive granular materials, Effect of porosity on the microstructural damping response of a 6061 aluminum alloys, Damping properties of aliphatic ... |
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