| Lithographically-Scribed Planar Holographic Optical CDMA Devices and Systems |
15 FEB 2007 |
58 pages |
| Authors:
Thomas Mossberg; LIGHTSMYTH TECHNOLOGIES INC EUGENE OR
|
 | Recent advances in photo lithographic fabrication and planar waveguides have created a powerful opportunity. For the First time it is possible to generate arbitrary computer-designed. waveguide volume holograms and to do so robustly and at low cost. Holographic Bragg Reflectors (HBRs) comprise an exemplary lithographically scribed fully integrated holographic device useful for multiplexing of wavelength differentiated optical signals and general purpose spectral filtering. HBRs provide both a flexible spectral filtering ... |
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| Binocular Rivalry and Attention in Helmet-Mounted Display Applications |
FEB 2007 |
8 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christin Covas; Jason Rogers; LINK SIMULATION AND TRAINING MESA AZ
|
| As monocular head-mounted displays (HMDs) are introduced into existing flight simulators for training and mission rehearsal it will be important to determine whether binocular rivalry affects the visibility of HMD presented symbology or the out-the-window (OTW) flight simulator display imagery. In the present study, we examined whether rivalry suppression could be objectively measured under conditions that simulated a monocular HMD and OTW display, and whether voluntary attention and moving imagery ... |
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| The Influence of Depth of Focus on Visibility of Monocular Head-Mounted Display Symbology in Simulation and Training Applications |
FEB 2007 |
12 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christine Covas; Jennifer Winner; LINK SIMULATION AND TRAINING MESA AZ
|
| The Joint Helmet Mounted Cueing System (JHMCS) is being considered for integration into the F-15, F-16, and F-18 aircraft. If this integration occurs, similar monocular head-mounted displays (HMDs) will need to be integrated with existing out-the-window simulator systems for training purposes. One such system is the Mobile Modular Display for Advanced Research and Training (M2DART), which is constructed with flat-panel rear-projection screens around a nominal eye-point. Because the panels are ... |
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| Depth of Focus and Perceived Blurring of Simultaneously-Viewed Displays |
FEB 2007 |
12 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christine Covas; Jennifer Winner; LINK SIMULATION AND TRAINING MESA AZ
|
| Head-mounted displays (HMDs) have not previously been combined with flat-panel display systems and it was unknown whether viewing two displays at differing focal plane distances would lead to perceived blurring or visual discomfort. This is now a concern as the Joint Helmet Mounted Cueing System (JHMCS) is integrated with existing flat-panel display systems such as the Mobile Modular Display for Advanced Research and Training (M2DART). The degree of blurring that ... |
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| Chip-Scale Controlled Storage All-Optical Memory |
FEB 2007 |
28 pages |
| Authors:
Constance Chang-Hasnain; Shun Lien Chuang; CALIFORNIA UNIV BERKELEY
|
| Goal of the project was to demonstrate a semiconductor waveguide device suitable for use as an all-optical buffer with a slow down factor of 1000 at room temperature. Theoretical and experimental research was performed to show the feasibility of slow light in semiconductor quantum wells. Prototype GaAs quantum well devices were fabricated, and characterized at both cryogenic and ambient laboratory temperatures. Mechanisms such as coherent population oscillation (CPO) and electromagnetically ... |
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| Helmet Tracker Requirements and Measurement Verification |
FEB 2007 |
22 pages |
| Authors:
Gary Martinsen; Judson Shattuck; Jeffrey Craig; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| A helmet tracker is a critical element in the path that delivers targeting and other sensor data to the user of a helmet-mounted display (HMD) in a military aircraft. This paper reviews helmet tracker technology with respect to use in military aviation. The human factors limitations of helmet tracker systems for delivering both targeting and flight reference information to a military pilot are also discussed. This paper also presents data ... |
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| Government Access to Phone Calling Activity and Related Records: Legal Authorities |
25 JAN 2007 |
|
| Authors:
Elizabeth B. Bazan; Gina M. Stevens; Brian T. Yeh; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | Media disclosures regarding an alleged National Security Agency (NSA) program designed to collect and analyze information on telephone calling patterns within the United States have raised interest in the means by which the Government may collect such information. The factual information available in the public domain with respect to any such alleged program is limited and in some instances inconsistent, and the application, if at all, of any possibly relevant ... |
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| Future Naval Concepts -- Crew Reductions through Improved Damage Control Communications (FNC-CRIDCC), Triad Test 2 Report (18-22 Sep 2006) |
12 JAN 2007 |
70 pages |
| Authors:
Thomas T. Street; Frederick W. Williams; L. S. Cooper; III Halloway Kenneth E.; Michael Rininger; Charles Miller; Bradley Shirley; Samuel Genovese; Rendell Perry; Kenney McCombs; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
|
| The object of Triad Test 2 was to conduct and document an RF coverage survey of the installed WLAN aboard ex-USS Shadwell in a benign environment, obtain RF WLA data during fire events, and evaluate the ability of the communications equipment to continue to provide a communication capability. The fire events were used to determine the ability of the equipment to provide voice and data communications over Voice over Internet ... |
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| 100 Gbit Interconnects and Above: The Need for Speed |
Jan-2007 |
82 pages |
| Authors:
W S Ring; OPTOELECTRONICS INDUSTRY DEVELOPMENT ASSOCIATION WASHINGTON DC
|
| Today's electronic society is seeing increased demand for data transfer, internet downloads, online applications, video sharing, and storage. Banks, companies, universities, and governments require large secure data centers connected to secure networks. This continuously drives the development for more powerful servers and computer systems. Today's data centers are not single computer systems but networked systems with distributed processing, computational power, and memory. The systems are connected by nodes, which connect ... |
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| Wavefront Aberration Correction Using Zernike Polynomial Parameterizations of Optical Phased Arrays (PREPRINT) |
2007 |
7 pages |
| Authors:
Jeffrey A. Butterworth; Charles Hindman; Seth Lacy; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
|
| High performance laser communication systems require adaptive optics based wavefront correction systems to correct aberrations that result from imperfections in optical hardware and atmospheric conditions. Traditionally, deformable membrane mirrors are used for wavefront correction. These mirrors are bulky and require excessive amounts of power, both of which can be detrimental to a space application. Liquid crystal based optical phased arrays (OPAs) offer an attractive alternative to these traditional devices. This ... |
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| Large Diameter, High Speed InGaAs Receivers for Free-Space Lasercom |
2007 |
13 pages |
| Authors:
H. R. Burris; M. S. Ferraro; C. I. Moore; P. G. Goetz; W. D. Waters; W. R. Clark; W. S. Rabinovich; L. M. Wasiczko; M. R. Suite; R. Mahon; NAVAL RESEARCH LAB WASHINGTON DC ADVANCED SYSTEMS TECHNOLOGY BRANCH
|
| The U. S. Naval Research Laboratory (NRL) and OptoGration, Inc. have collaborated in the development and testing of large area, high speed InGaAs avalanche photodiode (APD) receivers for use in free-space lasercom systems. A 200 micron diameter InGaAs APD receiver has been tested in a free-space lasercom testbed and has demonstrated sensitivities of -42.4 dBm at 622 Mbps and -44.8 dBm at 155 Mbps. A 100 micron diameter receiver has ... |
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| News Media Industry |
2007 |
29 pages |
| Authors:
Janet Anderson; Florentin Buhos; Ed Celentano; Yadmaa Choijamts; Iris Cooper; Ed Daniel; Nhu-Nga Do; Tara Feret-Erath; Yori R. Escalante; Paul Guinee; INDUSTRIAL COLL OF THE ARMED FORCES WASHINGTON DC
|
| The ability of US citizens to freely express their views and opinions is a gift we must never take for granted. A key means by which our government and citizens communicate is the News Media. This critical industry is now experiencing tremendous change. Technological advances have led to an explosion in communication media that now provide consumers more news options than ever before. Traditional media such as newspapers, television and ... |
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| Coordinating Initiation and Response in Computer-Mediated Communication |
DEC 2006 |
207 pages |
| Authors:
Laura A. Dabbish; CARNEGIE-MELLON UNIV PITTSBURGH PA HUMAN COMPUTER INTERACTION INST
|
| Communication interruptions make work sociable and interesting, and they support flexibility and knowledge transfer in the workplace. However, interruptions also delay task completion and degrade performance, with negative consequences for organizational effectiveness. When communication is technologically mediated, how can we maintain connectivity while reducing the potential disruption associated with informal interaction? This thesis examines factors influencing the decision to initiate and respond to communication, and the impacts of communication interactions ... |
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| Neck Muscle Fatigue with Helmet-Mounted Systems |
SEP 2006 |
8 pages |
| Authors:
Edward S. Eveland; Joseph A. Pellettiere; HUMAN EFFECTIVENESS DIRECTORATE WRIGHT-PATTERSON AFB OH AIRCREW PROTECTION BRANCH
|
| Helmet-mounted systems (HMS) allow aircrew to perform more efficiently in poor conditions. Optics allow improved visibility, night vision, helmet-mounted displays, and targeting capability. The cost to use them in high performance aircraft is unknown. Test flights were made with pilots wearing HMS and neck muscles were evaluated. Objectives were to test the functionality of the helmet-mounted devices and to determine the impact on pilots using them during high G acceleration. ... |
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| Critical Infrastructure Protection: How to Assess and Provide Remedy to Vulnerabilities in Telecom Hotels |
SEP 2006 |
109 pages |
| Authors:
Michael A. Ordonez; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| America's open society includes a vast array of critical infrastructure and key resources that are vulnerable to terrorist attacks. While it is not possible to protect or eliminate vulnerabilities of all critical infrastructures in the United States, strategic improvements can be made to harden these assets and mitigate any damaging effects if an attack were to occur. Current network assessment methods and protective measures are inadequate. As a consequence, the ... |
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| Performance Effects of Mounting a Helmet-Mounted Display on the ANVIS Mount of the HGU-56P Helmet (Reprint) |
SEP 2006 |
11 pages |
| Authors:
Thomas H. Harding; John S. Martin; Clarence E. Rash; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The U.S. Army, under the auspices of the Air Warrior Product Office, is developing a modular helmet-mounted display (HMD) for four aircraft series within its helicopter fleet. A design consideration is mounting the HMDs to the HGU-56P Aviator's Night Vision Imaging System (ANVIS) mount. This particular mount is being considered, presumably due to its inherent cost savings, as the mount is already part of the helmet. Mounting the HMD in ... |
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| Field Tests of Acoustic Telemetry for a Portable Coastal Observatory |
Sep-2006 |
7 pages |
| Authors:
Bradford Butman; Marinna Martini; Jonathan Ware; Dan Frye; GEOLOGICAL SURVEY WOODS HOLE MA
|
| Long-term field tests of a low-cost acoustic telemetry system were carried out at two sites in Massachusetts Bay. At each site, an acoustic Doppler current profiler mounted on a bottom tripod was fitted with an acoustic modem to transmit data to a surface buoy; electronics mounted on the buoy relayed these data to shore via radio modem. The mooring at one site (24 m water depth) was custom-designed for the ... |
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| Remote, Aerial, Trans-Layer, Linear and Non-Linear Downlink Underwater Acoustic Communication |
Sep-2006 |
8 pages |
| Authors:
Fletcher Blackmon; Lynn Antonelli; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
|
| Abstract-Both the linear mechanism for optical to acoustic energy conversion are explored for opto-acoustic communication from an in-air platform to a submerged vessel such as a submarine or unmanned undersea vehicle. This downlink communication can take the form of a bell ringer function for submerged platforms or for the transmission of text and/or data. The linear conversion mechanism, also known as the linear opto-acoustic regime where laser energy is converted ... |
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| Modeling and Interpretation of Beamforming Gain and Diversity Gain for Underwater Acoustic Communications |
Sep-2006 |
6 pages |
| Authors:
T C Yang; NAVAL RESEARCH LAB WASHINGTON DC
|
| Output signal-to-noise ratios for a multichannel decision feedback equalizer were measured from experimental BPSK data as a function of the receiver spacing, number of receivers used, and array aperture and reported in a paper in OCEANS 2005 by the author. This paper discusses the theory and reports numerical modeling results to compare with the data. |
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| Effects of Multiple Scattering on the Implementation of an Underwater Wireless Optical Communications Link |
Sep-2006 |
7 pages |
| Authors:
Alan Laux; Brandon Cochenour; Linda Mullen; Tom Curran; NAVAL AIR SYSTEMS COMMAND PATUXENT RIVER MD
|
| Recent interest in ocean exploration has brought about a desire for developing wireless communication techniques in this challenging environment. Due to its high attenuation in water, a radio frequency (RF) carrier is not the optimum choice. Acoustic techniques have made tremendous progress in establishing wireless underwater links, but they are ultimately limited in bandwidth. A third option is optical radiation, which is discussed in this paper. One drawback of underwater ... |
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| Error Rate Improvement in Underwater MIMO Communications Using Sparse Partial Response Equalization |
Sep-2006 |
7 pages |
| Authors:
Vincent McDonald; Subhadeep Roy; Tolga M Duman; ARIZONA STATE UNIV TEMPE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Point-to-point links using multiple transmitters and receivers or MIMO (multiple input, multiple output) configurations and associated signal processing at the receiver, can provide significant improvements in both data rate and reliability and is a promising technology for enhancing communications in the band-limited and highly-dynamic underwater acoustic (UWA) channel. Although the underwater channel impulse response extent can span tens to hundreds of symbols, it is generally sparse in nature and well ... |
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| Field Tests of the Hybrid Remotely Operated Vehicle (HROV) Light Fiber Optic Tether |
Sep-2006 |
7 pages |
| Authors:
Robert Elder; Matt Heintz; Dana Yoerger; Andrew Bowen; Louis L Whitcomb; Chris Young; Robert McCabe; Chris Taylor; James Buescher; Barbara Fletcher; Robert Fuhrmann; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| The Hybrid Remotely Operated Vehicle (HROV), being designed and built by Woods Hole Oceanographic Institution (WHOI) with the support of the Space and Naval Warfare Systems Center San Diego (SSC San Diego), will provide a new level of accessibility for deep ocean research. HROV will be primarily an autonomous vehicle but will be reconfigurable to a teleoperated system by the installation of a fiber optic data link and a manipulator ... |
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| Visual Suppression of Monocularly Presented Symbology Against a Fused Background in a Simulation and Training Environment |
AUG 2006 |
13 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Amanda Taylor; AIR FORCE RESEARCH LAB MESA AZ
|
| When wearing a monocular head-mounted display (HMD), one eye views the HMD symbology while both eyes view an out-the-window scene. This may create interocular differences in image characteristics that could disrupt binocular vision by provoking visual suppression, thus reducing visibility of the background scene, monocular symbology, or both. However, binocular fusion of the background scene may mitigate against the occurrence of visual suppression, a hypothesis that was investigated in the ... |
|
| Devices and Control Strategies for AD HOC Optical Communications Networks |
26 JUN 2006 |
11 pages |
| Authors:
John Baillieul; Thomas Bifano; BOSTON UNIV MA DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
|
| The research under this project has been aimed at proving the potential value of key elements (both hardware and operational concepts) that we plan to develop in initiating an ambitious program of research to develop a radical new technology for high-bandwidth, stealthy communication over free-space optical links. The results of the project have been several prototype systems which integrate optical components (a MEMS-based spatial light modulator (SLM) integrated with a ... |
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| Towards Determination of Visual Requirements for Augmented Reality Displays and Virtual Environments for the Airport Tower |
01 JUN 2006 |
29 pages |
| Authors:
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
|
| The visual requirements for augmented reality or virtual environments displays that might be used in real or virtual towers are reviewed with respect to similar displays already used in aircraft. As an example of the type of human performance studies needed to determine the useful specifications of augmented reality displays, an optical see-through display was used in an ATC Tower simulation. Three different binocular fields of view (14 , 28 ... |
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| Effects of Head Up Display Symbology Lag on Recovery from Inadvertent Instrument Meteorological Conditions: Performance Costs |
JUN 2006 |
18 pages |
| Authors:
Arthur Estrada; Patricia LeDuc; Siobhan Gallagher; Joanna Greig; Shannen Dumond; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The past three decades of technological advances in U.S. Army aviation have provided the capability to fly nap-of-the-earth (NOE) missions at night. The technology that has enabled Army pilots to gain this operational advantage is the head-mounted illumination intensification device called the Night Vision Goggle (NVG) (Collins and Piccione, 1998). Further workload reduction efforts have led to the production of a head up display (HUD) for the Aviator's Night Vision ... |
|
| Analysis of Interchannel Crosstalk in a Dispersion-Managed Analog Transmission Link |
JUN 2006 |
7 pages |
| Authors:
Brian S. Marks; Curtis R. Menyuk; Anthony L. Campillo; Frank Bucholtz; MARYLAND UNIV BALTIMORE DEPT OF COMPUTER SCIENCE AND ELECTRICAL ENGINEERING
|
| A technique for computing the effect of cross-phase modulation (XPM) on two co-propagating analog channels in an optical fiber link is presented. In this approach, the interaction between the two channels is linearized by keeping the self-phase modulation (SPM) and XPM interactions in the strong optical carrier components only at lowest order and then at the next order, deriving the effect on the modulation components of both channels when the ... |
|
| Effects of Using Licensed Practical Nurses to Assist with Telephone Consultation Management |
23 MAY 2006 |
58 pages |
| Authors:
Jennifer L. Wiley; DWIGHT DAVID EISENHOWER ARMY MEDICAL CENTER FORT GORDON GA
|
| The purpose of this project was to examine the effects of using Licensed Practical Nurses to assist providers with telephone consults at one of Dwight David Eisenhower Army Medical Center's primary care clinics. The study compared means of pre- and post-implementation provider overall job satisfaction, provider satisfaction with the telephone consult process, average daily hours providers spent on telephone consults, and the length of time to complete patient generated telephone ... |
|
| Government Access to Phone Calling Activity and Related Records: Legal Authorities |
17 MAY 2006 |
|
| Authors:
Elizabeth B. Bazan; Gina M. Stevens; Brian T. Yeh; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| Recent media disclosures regarding an alleged National Security Agency (NSA) program designed to collect and analyze information on telephone calling patterns within the United States have raised interest in the means by which the Government may collect such information. The factual information available in the public domain with respect to any such alleged program is limited and, in some instances, inconsistent, and the application, if at all, of any possibly ... |
|
| Net Neutrality: Background and Issues |
16 MAY 2006 |
|
| Authors:
Angele A. Gilroy; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| As the 109th Congress continues to debate telecommunications reform, a major point of contention is the question of whether action is needed to ensure unfettered access to the Internet. The move to place restrictions on the owners of the networks that compose and provide access to the Internet, to ensure equal access and nondiscriminatory treatment, is referred to as "net neutrality." There is no single accepted definition of "net neutrality." ... |
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| Digital Surveillance: The Communications Assistance for Law Enforcement Act |
10 MAY 2006 |
|
| Authors:
Patricia M. Figliola; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The Communications Assistance for Law Enforcement Act (CALEA, P.L. 103-414, 47 USC 1001-1010), enacted October 25, 1994, is intended to preserve the ability of law enforcement officials to conduct electronic surveillance effectively and efficiently despite the deployment of new digital technologies and wireless services that have altered the character of electronic surveillance. CALEA requires telecommunications carriers to modify their equipment, facilities, and services, wherever reasonably achievable, to ensure that they ... |
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| Head and Helmet Biodynamics and Tracking Performance in Vibration Environments |
MAY 2006 |
12 pages |
| Authors:
Suzanne D. Smith; Jeanne A. Smith; GENERAL DYNAMICS ADVANCED INFORMATION SYSTEMS DAYTON OH
|
| There are potential effects of vibration on aircrew performance and safety when using helmet-mounted equipment The objective of this study was to quantify the effects of head orientation and helmet center-of-gravity (CC) on head and helmet biodynamics and tracking performance during exposures to aircraft buffeting and quasi-random vibration. Three head orientations, including two off-axis or off-boresight configurations [Side (40" elevation, 70" azimuth) and Up (40" elevation, 0" azimuth)], and three ... |
|
| Visual Suppression of Monocularly Presented Symbology Against a Fused Background in a Simulation and Training Environment |
May-2006 |
12 pages |
| Authors:
Robert Patterson; Amanda Taylor; Marc D Winterbottom; Byron J Pierce; AIR FORCE RESEARCH LAB MESA AZ
|
| When wearing a monocular head-mounted display HMD, one eye views the HMD symbology while both eyes view an out-the-window scene. This may create interocular differences in image characteristics that could disrupt binocular vision by provoking visual suppression, thus reducing visibility of the background scene, monocular symbology, or both. However, binocular fusion of the background scene may mitigate against the occurrence of visual suppression, a hypothesis that was investigated in the ... |
|
| Evaluation of the Microvision Spectrum SD2500 Helmet-Mounted Display for the Air Warrior Block 3 Day/Night HMD Program |
MAR 2006 |
24 pages |
| Authors:
Clarence E. Rash; Thomas H. Harding; J. S. Martin; Howard H. Beasley; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The Microvision Spectrum SD2500 HMD, a monocular, full-color scanning laser display, display, was evaluated for optical image quality. The data indicated compliance with spectral integrity, field curvature, refresh rate, luminance uniformity, distortion and exit pupil size specifications. However, the contrast transfer function and the modulation transfer function clearly showed that the system had insignificant modulation at the Nyquist frequency. The trapezoidal shaped field-of-view was determined to be noncompliant, and the ... |
|
| Flare Cue Symbology for Zero-Zero Weather Landings |
MAR 2006 |
13 pages |
| Authors:
Guy A. French; David M. Murphy; William R. Ercoline; GENERAL DYNAMICS ADVANCED INFORMATION ENGINEERING SERVICES INC DAYTON OH
|
| When flying an airplane, landing is arguably the most difficult task a pilot can do. This applies to pilots of all skill levels particularly as the level of complexity in both the aircraft and environment increase. Current navigational aids, such as an instrument landing system (ILS), do a good job of providing safe guidance for an approach to an airfield. These aids provide data to primary flight reference (PFR) displays ... |
|
| Photovoltaically Powered Modulating Retroreflectors |
MAR 2006 |
7 pages |
| Authors:
R. J. Walters; J. L. Murphy; W. S. Rabinovich; G. C. Gilbreath; D. M. Wilt; M. A. Smith; M. J. Krasowski; P. P. Jenkins; D. Schelman; J. H. Warner; NAVAL RESEARCH LAB WASHINGTON DC
|
| Abstract. The development of a photovoltaically PV powered laser communication system that constitutes a miniature, highly energy efficient wireless communication technology is described. The technology is based on the direct integration of a multiquantum well (MQW) modulating retroreflector (MRR) optical communication node and a monolithically integrated module (MIM) PV power source. The MQW MRR optical data link exploits the shift in the MQW absorption peak under an applied reverse bias ... |
|
| The Effects of Pushing the Digital Divide to the Fighting Hole |
03-Feb-2006 |
14 pages |
| Authors:
J M Hamilton; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| As society moves from the industrial age to the information age, the importance of sharing accurate and timely information throughout the asymmetric battlespace is becoming increasingly apparent. The current lessons learned from Afghanistan and Iraq have shown that, oftentimes, it is the Platoon Leader, and not the Battalion Commander, who needs the digital communication feed from the Unmanned Aerial Vehicle (UAV) so that a critical tactical decision can be made. ... |
|
| Development of the C-17 Heads-Up Display (HUD) Container, CNU-676/E |
27 JAN 2006 |
47 pages |
| Authors:
Robbin L. Miller; Susan J. Evans; AIR FORCE PACKAGING TECHNOLOGY AND ENGINEERING FACILITY WRIGHT-PATTERSON AFB OH
|
| The Air Force Packaging Technology and Engineering Facility (AFPTEF) was tasked with the design of a new shipping and storage container for the C-17 Heads-Up Display (HUD) unit in March of 2004. The new container is designed to replace the wood/fiberboard combination package presently used. The current containers lack of mechanical and environmental protection as well as handling issues prompted AFPTEF's design of a new container. The new container will ... |
|
| An Algorithm for Distributed Location Management in Networks of Mobile Computers |
2006 |
26 pages |
| Authors:
Svetlana Kryukova; Berna Massingill; Beverly Sanders; TANNER RESEARCH INC PASADENA CA
|
| In a network supporting mobile communication devices, a mechanism to find the location of a device, wherever it may be, is needed. In this paper, we present a distributed algorithm for this purpose along with its formal specification and proof sketch. Inspired by our experiences with Wang's algorithm, one goal of this paper is to demonstrate that the process of formalization together with careful attention to abstraction and presentation can ... |
|
| Identifying Error in AUV Communication |
2006 |
9 pages |
| Authors:
Joseph Coleman; Kaylani Merrill; Michael O'Rourke; Andrew G. Rajala; Dean B. Edwards; IDAHO UNIV MOSCOW CENTER FOR INTELLIGENT SYSTEMS RESEARCH
|
| Mine Countermeasures (MCM) involving Autonomous Underwater Vehicles (AUVs) are especially susceptible to error, given the constraints on underwater acoustic communication and the inconstancy of the underwater communication channel. Little work has been done to systematize error identification and response in AUV communication. We introduce a systematic approach involving Design Failure Mode and Effects Analysis (DFMEA) that is adapted to the complex character of communication between autonomous agents. |
|
| Packet Testing in Free-Space Optical Communication Links Over Water |
2006 |
11 pages |
| Authors:
M. R. Suite; H. R. Burris; C. I. Moore; M. F. Stell; L. Wasiczko; W. Freeman; W. S. Rabinovich; G. C. Gilbreath; W. J. Scharpf; NAVAL RESEARCH LAB WASHINGTON DC ADVANCED SYSTEMS TECHNOLOGY BRANCH
|
| NRL's Chesapeake Bay lasercom test facility (LCTF) offers a variety of ranges for researching free-space optical laser communication (FSO lasercom) links in a maritime environment. This paper discusses link performance over the 16 km one-way range at the LCTF. There are several methods to determine the link quality in FSO lasercom. Bit-error-rate (BER) testing and packet testing are two possible methods. Since errors generally tend to occur in bursts in ... |
|
| Testing Agile Information Management Systems with Video Test Client. Case Study - DIMES |
2006 |
42 pages |
| Authors:
Lok K. Yan; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| In a Network Centric Warfare (NCW) environment, geographically distributed forces are networked together to attain military advantage, e.g. force agility. At the core of NCW is the ability for these distributed forces to collaborate and share information, which are the two services provided by information management systems located on the Global Information Grid (GIG). Due to the fact that a single system can not be perfect for all possible applications, ... |
|
| Single-Photon Generator for Optical Telecommunication Wavelength |
2006 |
5 pages |
| Authors:
T. Usuki; Y. Sakuma; S. Hirose; K. Takemoto; N. Yokoyama; T. Miyazawa; M. Takatsu; Y. Arakawa; FUJITSU LABS LTD ATSUGI (JAPAN)
|
| We report on the generation of single-photon pulses from a single InAs/InP quantum dot in telecommunication bands (1.3-1.55 micrometers: higher transmittance through an optical fiber). First we prepared InAs quantum dots on InP (0 0 1) substrates in a low-pressure MOCVD by using a so-called InP double-cap procedure. The quantum dots have well-controlled photo emission wavelength in the telecommunication bands. We also developed a single-photon emitter in which quantum dots ... |
|
| Advanced UMV Operator Interfaces |
DEC 2005 |
11 pages |
| Authors:
Marker Draper; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| A head-mounted display (HMD) presents real video imagery or synthetically generated visual imagery via a head-mounted optic system with very small displays attached to a helmet, visor, or set of spectacles (see Figure 1). There is a wide range of technologies and approaches associated with today's HMD systems, including the type and quality of image display, monocular versus bi-ocular design, the ability to display color images, the ability to effectively ... |
|
| Underwater Acoustic Networks: An Acoustic Propagation Model for Simulation of Underwater Acoustic Networks |
DEC 2005 |
113 pages |
| Authors:
Leopoldo J. Solorzano; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Underwater Acoustic Networks (UANs) hold enormous potential for both military and civilian applications. However, current networking protocols implemented are often sub-optimal, resulting in severely underutilized networks. We believe one of the key reasons for this shortcoming is a lack of good underwater acoustic propagation models for simulation packages used to evaluate UAN protocols. This thesis addresses this problem by developing a computationally-efficient approximation of a sophisticated analytical model called Monterey-Miami ... |
|
| Design and Integration Issues for Visually Coupled Systems |
DEC 2005 |
77 pages |
| Authors:
Vincent Parisi; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| This is a briefing on design and integration issues for visually coupled systems that was presented to AATC (The Air National Guard/Reserve Test Center/Tuscon AZ). |
|
| Helmet-Mounted Displays for Use in Air Force Training and Simulation |
NOV 2005 |
62 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; AIR FORCE RESEARCH LAB MESA AZ HUMAN EFFECTIVENESS DIRECTORATE
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| This report provides a review and analysis of the published literature on head-mounted displays (HMDs). In particular, we discuss several key perceptual issues that are relevant to the use of HMDs. The issues discussed are: (1) brightness and contrast; (2) accommodationvergence synergy; (3) field of view; (4) binocular input; and (5) head movements. This review of the literature is intended to anticipate and solve perceptual issues associated with two particular ... |
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| Acoustic Focusing in Shallow Water and Bubble Radiation Effects |
20 OCT 2005 |
9 pages |
| Authors:
Grant B. Deane; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
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| The long-term goals of the "Acoustic Focusing in Shallow Water and Bubble Radiation Effects" project is as follows: (1) understand the role of wave-induced bubbles in the upper ocean boundary layer on the performance of underwater communications systems and ambient noise generation, (2) study the implications of focusing by surface gravity waves on Doppler sonar and acoustic communications systems in shallow and very shallow water, and (3) study the performance ... |
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| Optical Communications: A Compendium of Signal Formats, Receiver Architectures, Analysis Mathematics, and Performance Characteristics |
09 SEP 2005 |
253 pages |
| Authors:
Don M. Boroson; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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| There are a number of options for modulation formats in optical fiber and free-space lasercom systems. There are a seemingly even greater number of options for receiver architectures. Although most of these possibilities and combinations have been analyzed in journal publications and textbooks, there does not seem to be a single place to look for all relevant results concerning these options. Furthermore, comparisons of the options do not seem to ... |
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| Undersea Navigation of a Glider UUV Using an Acoustic Communications Network |
SEP 2005 |
91 pages |
| Authors:
Sean P. Ouimet; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The US Navy is developing Seaweb undersea acoustic networking technology to enable distributed autonomous ocean sensors. An Unmanned Undersea Vehicle (UUV) can operate as a mobile node among the grid in the conduct of its own mission, using the fixed nodes as navigation reference points. The fixed grid provides a cellular communications infrastructure for command & control and data telemetry. In turn, the UUV can support the fixed grid by ... |
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Non-radio Communications
