| Low Band Telemedicine Decision Support System for Disaster Situations |
OCT 2001 |
9 pages |
| Authors:
Patricia Hastings; TRIPLER ARMY MEDICAL CENTER HI
|
 | Problems encountered : 1) Poor quality of commercial wireless Internet connectivity We frequently faced poor Internet connection with a commercial wireless Internet service provider, which frustrated users. This is anticipated to improve as service improves regionally and globally. 2) Little evidence for clinical decision making We decided to develop a decision support system for crush injury because little epidemiological study is available for other disaster unique medical diagnoses. 3) Narrow ... |
|
| Department of Defense Mail Guard for High Robustness Environments |
30 SEP 2001 |
77 pages |
| Authors:
Linda M. Gilmore; Barbara Mayer; Rita Montequin; Kristina Rogers; Howard Weiss; BOOZ-ALLEN AND HAMILTON INC MCLEAN VA
|
| This Protection Profile (PP) specifies the information security requirements for DoD Mail Guards for High Robustness Environments. The Mail Guard specified in this PP sits between two protected network enclaves at different classification levels, controlling the flow of electronic messages sent between the two networks. The protection approach employs various processing, filtering, and data-blocking techniques in an attempt to provide data sanitization (e.g., downgrade) or separation between enclaves. Besides enforcing ... |
|
| Teleophtalmology for Diabetic Retinopathy Screening |
SEP 2001 |
10 pages |
| Authors:
Thomas Ward; Robert Bauer; WALTER REED ARMY MEDICAL CENTER WASHINGTON DC
|
| Several studies have suggested that telemedicine techniques may be used to screen patients for signs of diabetic retinopathy. The objective of this research is to use nonmydriatic digital fundus cameras to collect retinal images at remote sites that can be transmitted and interpreted by an ophthalmologist. The present study has examined the validity of using digital fundus images to recognize the presence and extent of retinopathy in diabetic patients. Nonmydriatic, ... |
|
| An Aerostat/Elevated Antenna Component to Aid VHF Radiotelemetry and Tracking of Right Whales in Critical Habitats |
AUG 2001 |
|
| Authors:
James H. Hain; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | Elevating the receiving antenna in projects to monitor movements and behaviors of right whales, Eubalaena glacialis, in critical habitats will increase range and efficacy. This was accomplished by mounting the antenna and receiver on an aerostat (tethered balloon). At altitudes of 200 ft or greater, ranges of 15-20 miles can be expected. This project evolved to include other applications, and demonstrated the use of aerostats for carrying antenna arrays, instrument ... |
|
| Intramodule Multielement Microsystem (IM2) Bus and Interface Circuit |
JUL 2001 |
54 pages |
| Authors:
Zhigang Wang; KENTUCKY UNIV LEXINGTON
|
| This report describes a communication bus for multielement 'smart sensor' microsystems and the architecture for a sensor bus interface circuit. The Intramodule Multielement Microsystem (IM2) Bus which has been developed provides a link between central control electronics and individual front-end transducers in a sensor-based microsystem. The Transducer Independent Interface (TII) of the IEEE standard for a Smart Transducer Interface for Sensors and Actuators (IEEE 1451.2) has been adopted and expanded ... |
|
| Telemedicine for the Canadian Forces: What Is a Viable Satellite Means for the Canadian Forces to Deliver Telemedicine Information Between a Deployed Force and a Canada Based Supporting Hospital |
01 JUN 2001 |
74 pages |
| Authors:
Timothy W. Walrod; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| Several nations currently use commercial off-the-shelf technology to provide telemedicine for military and civilian purposes. The vast distances and undeveloped regions that the Canadian Forces (CF) work across requires a transportable, satellite accessible telemedicine system that meets their requirements. The purpose of this thesis was to conduct an exploratory descriptive analysis to compare existing deployable telemedicine systems and identify which of those would best meet the telemedicine requirements of the ... |
|
| Secure Multicast Protocols for Group Communication |
JUN 2001 |
24 pages |
| Authors:
Louise E. Moser; P. M. Melliar-Smith; CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This final report for this project focuses on: Design and implementation of the Secure Group message ordering and group membership protocols, which are derived from our previous Trans/Total protocols. Design and implementation of the Secure Ring message ordering and group membership protocols, which are derived from our previous Totem single-ring protocols. Experimentation with the FORTEZZA card, the Cryptoki interface, and the Cryptolib software. Development of a system, called the Immune ... |
|
| Worldwide Meteorological and Oceanographic Data Distribution Using the Global Broadcast Service |
JUN 2001 |
59 pages |
| Authors:
William L. Wheeler Jr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Fleet Numerical Meteorology and Oceanography Center (FNMOC) produces large meteorological and oceanographic (METOC) data files in support of regional METOC centers worldwide. These data files can be from 50 megabytes to 1 gigabyte in size and can take up to one hour and twenty-eight minutes to send across a T-1 (1.544 Megabits per second (Mbps)) line due to physical limitations and network delays. However, not all of FNMOC's customers ... |
|
| Encrypted Mode Select ADS-B Tactical Military Situational Awareness |
JUN 2001 |
92 pages |
| Authors:
John R. Jochum; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| Mid-air collisions between tactical military aircraft occur somewhat frequently and are a product of the inherent danger of dynamic maneuvering and flight at high airspeeds. Each collision results in significant loss to the military in terms of aircrew injury or fatality and airframe damage or loss. However, tactical aircraft do not have a collision avoidance or situational awareness aid. A potential solution to improve pilots' awareness of proximate traffic is ... |
|
| The Outlook Y-JBI: An E-Mail Based Approach to Prototyping the Joint Battlespace Infosphere |
JUN 2001 |
14 pages |
| Authors:
Robert E. Marmelstein; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| One approach for rapidly implementing a prototype Joint Battlespace Infosphere (YJBI) publish and subscribe (P&S) system is to leverage the existing e-mail transport infrastructure. E-mail has the advantage of being standardized, pervasive, robust, and scalable. This Y-JBI is implemented though the peer-to-peer interaction of publisher and subscriber agents. These agent pass subscription requests, acknowledgements, and information objects to each other using Extensible Markup Language (XML) e-mail messages. Under this approach, ... |
|
| Standard Message Definition - Statement of Need |
10 MAY 2001 |
6 pages |
| Authors:
Sid Jones; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| There are many standards available to the telemetry community for internetworking systems together. The vast majority of these standards apply to the movement of data. A standard is needed to define the data itself. However, the format of the data being moved is closely tied to the applications that source and sink the data. This project will focus on defining a structure(s) for the various messages required within a data ... |
|
| Launch Support for the Skipper Satellite |
03 MAY 2001 |
10 pages |
| Authors:
Peter Erdman; PITTSBURGH UNIV PA
|
| Support was provided for a person to be at the Utah State Joint Operations Control Center (JOCC) during the flight of the Skipper satellite, and to develop software needed to display the spectrometers' data while the satellite is in orbit. A large amount of engineering and scientific data was to be collected during the flight of the Skipper satellite. These data needed to be reviewed in real time in order ... |
|
| Ultrashort Pulse, Monolithic Modelocked Lasers for WDM Systems |
MAY 2001 |
29 pages |
| Authors:
P. D. Dapkus; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERINGAND ELECTROPHYSICS
|
| A program of research to investigate the use of modelocked lasers as sources for WDM systems is reported. The objective of the program was to demonstrate modelocked lasers with ultrashort pulse widths that contain as many as 16 phase locked longitudinal modes. Analysis was carried to understand the role of self phase modulation on the spectral range of modes that could be phase locked in such a device. The results ... |
|
| Traffic Information Service (TIS) Planned Product Improvement (P21) Operational Test |
MAY 2001 |
108 pages |
| Authors:
Tuc Vu; Michael McNeil; FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ
|
| The Traffic Information Service (TIS) Planned Product Improvement final report provides the detailed analysis, results, conclusions, and final recommendations drawn from the Operational Test (OT) test results for the TIS p2I test effort, which was conducted at the Federal Aviation Administration (FAA) William J. Hughes Technical Center by the Surveillance Branch, ACT-310, from August 14, 2000, through December 22, 2000. The TIS is a Mode Select (Mode S) Data Link ... |
|
| Telemetry Networks |
MAY 2001 |
38 pages |
| Authors:
RANGE COMMANDERS COUNCIL WHITE SANDS MISSILE RANGE NM TELEMETRY GROUP
|
| Part 2 of the IRIG 106 Telemetry Standards addresses the standards specifically devoted to the area of Telemetry Networks. This part does not stand-alone and must be used in conjunction with Part 1 of the 106 Telemetry Standards to define and implement a telemetry system. |
|
| A Search for the Lost IDCSP Constellation |
03 APR 2001 |
20 pages |
| Authors:
J. V. Lambert; P. Sydney; J. L. Africano; V. SooHoo; K. Hamada; AIR FORCE RESEARCH LAB HANSCOM AFB MA
|
| IDCSP Constellation Provides Unique Challenge: a Family of Known US Spacecraft; Distinctive Orbital Characteristics; at the Limit of Current Capabilities. Recovery Will Provide Measure of New Sensor Performance. |
|
| Exploiting AFSCN Ranging Data for Catalog Maintenance |
03 APR 2001 |
|
| Authors:
A. J. Coster; R. Abbot; L. E. Thornton; D. Durand; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| The following topics are covered in this briefing: (1) Lincoln Experience with AFSCN data, (2) Calibration Issues, (3)Description of Project and Schedule |
|
| Exploiting AFSCN Ranging Data for Catalog Maintenance |
03 APR 2001 |
|
| Authors:
A. J. Coster; R. Abbot; L. E. Thornton; D. Durand; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| The Air Force Satellite Control Network (AFSCN) is composed of eight worldwide fixed remote tracking stations (Space Ground Link Stations, SGLS) hosting 15 antennas, plus two mission control nodes, one at Onizuka AFB, CA and the other at Schriever AFB, CO. One of the AFSCN message formats provides AFSCN metric data (range, range-rate, azimuth, and elevation). Currently the AFSCN metric data are not used by the Space Control Center for ... |
|
| Stochastic Control Problems in Mobile Communications |
29 MAR 2001 |
5 pages |
| Authors:
Paul Dupuis; Harold J. Kushner; BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS
|
| The book, Numerical Methods for Stochastic Control Problems in Continuous Time, contains the most comprehensive development of numerical algorithms and associated convergence proofs for a large part of the current forms of stochastic control problems, and has been quite popular. A second edition was completed. In addition to the broad coverage of the previous edition, it gives numerical algorithms and proofs for problems where the variance term is controlled, and ... |
|
| Implementation of Lifelink(TM) Connections at Brooke Army Medical Center (BAMC) |
19 MAR 2001 |
127 pages |
| Authors:
Brian Robey; E. S. Kinkler Jr; SOUTHWEST RESEARCH INST SAN ANTONIO TX
|
| This is the Final Report entitled "Implementation of LifeLink(TM) connections at Brooke Army Medical Center (BAMC)". This report describes the work that was performed during the course of the project, describes the technical configuration of the installation at BAMC, and reports on testing and demonstration activities using the equipment at BAMC. The objective of this project was to provide equipment and services as required to establish a "Hospital Terminal" node ... |
|
| Implementation of Spread Spectrum Image Steganography |
MAR 2001 |
32 pages |
| Authors:
Frederick S. Brundick; Lisa M. Marvel; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD ADVANCED COMPUTATIONAL AND INFORMATION SCIENCES DIRECTORATE
|
| Steganographic techniques are useful to convey hidden information by using various types of typically-transmitted multimedia data as cover for concealed communication. Spread Spectrum Image Steganography (SSIS) is a data- hiding/hidden-communication method that uses digital imagery as a cover signal. This report describes an SSIS prototype system for embedding messages in images and extracting messages from stegoimages. The components, which were written in the Java and C programming languages, were kept ... |
|
| Communications Issues in Shipboard Telemedicine |
MAR 2001 |
76 pages |
| Authors:
A. D. Ramirez; S. D. Russell; C. B. Phillips; M. W. Roberts; L. C. Russell; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| This study defines the specific communications capabilities of U.S. Navy ships and identifies operational problems and technical barriers prohibiting telemedicine on a wide scale. This information is needed so the transmission of medical data can be managed in conformance with shipboard capabilities and contingencies can be developed for the potential degradation of those capabilities. While communications requirements for telemedicine in the civilian sector continue to be defined and implemented on ... |
|
| Development, Simulation and Evaluation of the IEEE 802.11a Physical Layer in a Multipath Environment |
MAR 2001 |
|
| Authors:
Kok Chye Tan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis describes the development and simulation of the newly proposed IEEE 802.11a physical layer and demonstrates the effects of Additive White Gaussian Noise (AWGN) and multipath on its performances. The IEEE 802.11a standardization group has selected Orthogonal Frequency Division Multiplexing (OFDM) as the basis for the new 5 GHz standard, targeting a range of data rates from 6 up to 54 Mbps. Coded OFDM (COFDM) is a channel coding ... |
|
| Modeling Bluetooth Radio Technology Simulation Using Multi-Agent Based System and Genetic Algorithm Design Paradigm |
MAR 2001 |
129 pages |
| Authors:
Mustafa Dinc; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis uses Multi-agent systems (MAS), and Genetic Algorithm (GA) techniques to develop a Bluetooth radio system simulation that is called "Wireless World". Typically, wireless world is a simple two-dimensional (2D) toy model of Bluetooth Technology implemented in the Java programming language version 1.2.1 and Borland jbuilder3 university edition editor environment. In addition, the wireless model is designed for outdoor environment for the six different weather conditions. And in the ... |
|
| Numerical Study of Optical Delay in Semiconductor Multilayer Distributed Bragg Reflector and Tunable Microcavity Structures |
MAR 2001 |
108 pages |
| Authors:
Michael I. Etan; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
|
| The Air Force has a growing need for the greater bandwidth, speed, and flexibility offered by optical communication links. Future space systems and airborne platforms will most likely use optical signals for efficient power transmission and to minimize the possibility of spoofing and eavesdropping. Tunable optical delays play an important role in the implementation of free space optical communication links. The primary challenge in implementing these systems is the active ... |
|
| Dataman Project-Information Services for Low-Powered Wireless Mobile Clients |
MAR 2001 |
7 pages |
| Authors:
Tomasz Imielinski; B. R. Badrinath; RUTGERS - THE STATE UNIV PISCATAWAY NJ
|
| The goal of the research effort in the DataMan Project is the development of novel wireless information services, location-dependent protocols such as geographic routing, and low energy protocols for wireless networks and devices. In each of the areas we have made progress and several results to report. First, the problem of efficient energy management and bandwidth utilization has been addressed using the concept of Meta-Channel designed for dissemination of information ... |
|
| Effects of Proton Irradiation on InGaAs/AlGaAs Multiple Quantum Well Modulators (Preprint) |
MAR 2001 |
8 pages |
| Authors:
Peter G. Goetz; W. S. Rabinovich; Robert J. Walters; Scott R. Messenger; G. C. Gilbreath; Rita Mahon; M. Ferraro; Kiki Ikossi-Anastasiou; D. S. Katzer; NAVAL RESEARCH LAB WASHINGTON DC
|
| Recently large area multiple quantum well (MQW) optical modulators have been coupled to cornercube optical retro-reflectors to allow free-space optical communications using a lightweight, low-power device. A pointing/tracking system and laser are required only on one end of the link. Such a system is attractive for ground-to-space links or space-to-space communication between a satellite and a microsat. An important question for these potential space-borne systems is the radiation tolerance of ... |
|
| Fibre Channel Avionics Bus Monitor |
27 FEB 2001 |
162 pages |
| Authors:
Sid Jones; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| The following document is the result of a semester long independent study course at Johns Hopkins University (JHU). This document discusses the concept development stage of a conceivable System to monitor data from a Fibre Channel avionics bus for test purposes. Specifically. it addresses the system need (why) and the system requirements (what). The document also contains several top-level discussions as to implementation options (how). This document was a tool ... |
|
| Improving File Fetches in AFS |
12 FEB 2001 |
13 pages |
| Authors:
Charles J. Antonelli; Kevin Coffman; Jim Rees; MICHIGAN UNIV ANN ARBOR CENTER FOR INFORMATION TECHNOLOGY INTEGRATION
|
| We describe two enhancements to the AFS distributed file system intended to improve the performance of large file fetches over high-speed networks. Selective caching AFS bypasses the client local disk when fetching files, which improves the performance of applications such as streaming video, for which local caching is of little benefit, and gives client processor and cache resources to applications for which local caching is an advantage. Split- path AFS ... |
|
| Development of the Moffitt Cancer Network as a Telemedicine and Teleconferencing Educational Tool for Health Care Providers |
FEB 2001 |
24 pages |
| Authors:
Jeffrey P. Krischer; UNIVERSITY OF SOUTH FLORIDA TAMPA
|
| The Moffitt Cancer Network's (MCN) goal is to provide up-to-date oncology related information, resources, and education to oncology health care providers and researchers for the prevention and cure of cancer. The MCN provides access to educational programming, cancer control and clinical protocols, and a mechanism to exchange patient focused information leading to the improved detection and treatment of cancer. The MCN is health care provider focused and complements an array ... |
|
| Telemetry Standards |
FEB 2001 |
387 pages |
| Authors:
RANGE COMMANDERS COUNCIL WHITE SANDS MISSILE RANGE NM TELEMETRY GROUP
|
| The Telemetry Standards have taken on a new look effective with this release. The IRIG-106 is now published in two parts. Part I contains the more familiar information and standards that have been evolved over the years. Part II is a totally new entity. This new part is devoted to the standards associated with the present technological evolution I revolution in the telemetry networks area. |
|
| A Prospective Evaluation of Telemedicine in Remote Naval Populations Seeking Specialty Care |
05 JAN 2001 |
26 pages |
| Authors:
Ted Melcer; Darrell Hunsaker; Bobbi Crann; Lisa Caola; William Deniston; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Telemedicine technologies, such as Internet and live videoteleconferencing (VTC), have great potential to provide specialty care for naval personnel in remote treatment facilities at sea or onshore. This study focused on the clinical impact of ear/nose/throat (ENT) consultations conducted via live VTC during a planned, 4-month study period in TRICARE Region 9 Also, interviews of physician and non-physician medical personnel assessed their attitudes and recent use of telemedicine. A total ... |
|
| Passive Aircraft Status System (PASS) Preliminary Plan for Technology Development |
JAN 2001 |
38 pages |
| Authors:
NCI INFORMATION SYSTEMS INC FAIRBORN OH
|
| The purpose of the Passive Aircraft Status System (PASS) demonstration is to exhibit the potential use of PASS in the aircraft maintenance arena. The PASS demonstration design and development is based upon data collected in the field from various field visits, platforms, and all levels of maintainers. This is the third phase of a three-phase effort and addresses the conceptual design and technologies used in the development of the PASS ... |
|
| Wavelet-Based Smoothing and Multiplexing of VBR Video Traffic |
2001 |
5 pages |
| Authors:
Dejian Ye; Zixiang Xiong; Huai-Rong Shao; Qiufeng Wu; Wenwu Zhu; TEXAS A AND M UNIV COLLEGE STATION DEPT OF ELECTRICAL ENGINEERING
|
| Although VBR coding is more efficient than CBR coding, the burstiness of VBR video traffic brings great difficulty to network resource management. To address this problem, we propose a novel wavelet-based traffic smoothing (WTS) algorithm. Unlike existing algorithms, which only have one resolution, the WTS algorithm has the multiresolutional property that is preferable for smoothing VBR video traffic that exhibits a self-similar behavior. WTS allows traffic smoothing at multiple resolutions ... |
|
| Nonlinear Instabilities in TCP-RED |
2001 |
10 pages |
| Authors:
Priya Ranjan; Eyad H. Abed; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
|
| This work introduces a discrete time model for a simplified TCP network with RED control. It is argued that by sampling the state space at certain instants, the dynamics of the system can be described explicitly as a discrete time feedback control system. This system is used to analyze the operating point of TCP-RED and its stability with respect to various controller and system parameters. With the help of bifurcation ... |
|
| MDVA: A Distance-Vector Multipath Routing Protocol |
2001 |
9 pages |
| Authors:
Srinivas Vutukury; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| Routing protocols using the Distributed Bellman-Ford (DBF) algorithm converge very slowly to the correct routes when link costs increase, and in the case where a set of link failures results in a network partition, DBF simply fails to converge, a problem that is commonly referred to as the count-to-infinity problem. In this paper, the authors present the first distance vector routing algorithm, the Multipath Distance-Vector Algorithm (MDVA), that uses a ... |
|
| Multiple Quantum Well Retromodulators for Low Power, Covert Infrared Data Links |
2001 |
12 pages |
| Authors:
G. C. Gilbreath; Timothy J. Meehan; Robert J. Walters; Sharon Mozersky; Mena Ferraro; Scott R. Messenger; William S. Rabinovich; NAVAL RESEARCH LAB WASHINGTON DC INFORMATION TECHNOLOGY DIV
|
| In this paper, we describe progress in the development of the Multiple Quantum Well retromodulator for compact, covert data transfer which is uniquely suited to unmanned vehicles. Device power draw is quite low and can be sun-powered with possible laser light augmentation in some strategies. Carrier wavelengths are in the infrared so interference is not an issue and shutter speeds can support up to 10 Mbps. Progress in demonstrating solar-powered ... |
|
| Performance Modeling and Evaluation of Topologies for Low-Latency SCI Systems |
2001 |
22 pages |
| Authors:
Damian M. Gonzalez; Alan D. George; Matthew C. Chidester; FLORIDA UNIV GAINESVILLE HIGH-PERFORMANCE COMPUTING AND SIMULATION RESEARCH LAB
|
| This paper presents an analytical performance characterization and topology comparison from a latency perspective for the Scalable Coherent Interface (SCI). Experimental methods are used to determine constituent latency components and to verify the results obtained by these analytical models as close approximations of reality. In contrast with simulative models, analytical SCI models are faster to solve, yielding accurate performance estimates very quickly, and thereby broadening the design space that can ... |
|
| (BMDO) All-Optical Wavelength Coded Logic |
31 DEC 2000 |
11 pages |
| Authors:
Kerry Vahala; CALIFORNIA INST OF TECH PASADENA OFFICE OF SPONSORED RESEARCH
|
| F49620-97-1-0512 is the principal grant for all of this work; F49620- 97-1-0430 was an ASSERT grant associated with F49620-97-1-0512 to furnish graduate-student support; and F49620-98-1-0409 was a DURIP award associated with the principal grant This report describes the culmination and pinnacle of our effort on the logic-gate program stemming from the principal grant F49620-97-1- 0512 This work began with the concept of all-optical spectral logic based on the polarization selection ... |
|
| Prototyping and Optimization of Ultra-High Speed Fiber Optic Links |
29 DEC 2000 |
5 pages |
| Authors:
Curtis R. Menyuk; MARYLAND UNIV BALTIMORE DEPT OF COMPUTER SCIENCE AND ELECTRICAL ENGINEERING
|
| The research was aimed at determining the impact of nonlinearity on the distribution of the differential group delay due to nonlinearity. And at determining the length scale over which polarization mode dispersion (PMD) yields the well-known asymptotic Maxwellian distribution. Professor Kath assisted with both projects. The work in both projects was presented at conferences and is being prepared for publication. In the first project, we simulated a large number of ... |
|
| Airborne JTIDS Net Controller |
15 DEC 2000 |
|
| Authors:
William C. Cave; PREDICTION SYSTEMS INC SPRING LAKE NJ
|
| Current JTIDS operations utilize a small portion of its theoretical capabilities. Most importantly, they do not use the full multi-net facilities that support significant densities of concurrent radio traffic in a limited spatial area while maintaining a high AJ margin. Furthermore, a substantial effort is required for mission planning to design a network, and real-time changes are limited. Establishing and maintaining an operational network requires control assets that may not ... |
|
| Design and Experimental Evaluation of an Electro-Optical, Sigma-Delta Modulator for Wideband Digital Antennas |
DEC 2000 |
107 pages |
| Authors:
William U. Gillespie; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Electro-optical sigma-delta analog-to-digital converters (ADCs) use a pulsed laser to oversample an input signal at two Mach-Zehnder interferometer modulators. A fiber lattice accumulator is embedded within a feedback loop around a single-bit quantizer to spectrally shape the quantization noise to fall outside the signal band of interest. Applications of electro-optical sigma-delta ADCs include digitizing wideband radio frequency signals directly at an antenna (digital antenna). The design considerations, construction process and ... |
|
| Study of a Potential Single Point Household Communications Product Utilizing Internet Protocol |
DEC 2000 |
92 pages |
| Authors:
Donna L. Fortin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The future of networking technology and the Internet offer a great deal of promise. The potential is forthcoming as newer hardware technology and higher bandwidth capable protocols are designed and implemented. This thesis investigates the possibility of utilizing existing hardware with presently available software to create a practical communication package for the household. The household communication package or home communicator is the network core of the household linking television, telephone, ... |
|
| (BMDO) All Optical Wavelength Coded Logic Gates |
30 NOV 2000 |
11 pages |
| Authors:
Kerry Vahala; CALIFORNIA INST OF TECH PASADENA OFFICE OF SPONSORED RESEARCH
|
| F49620-97-1-0512 is the principal grant for all of this work; F49620- 97-1-0430 was an ASSERT grant associated with F49620-97-1-0512 to furnish graduate-student support; and F49620-98-1-0409 was a DURIP award associated with the principal grant This report describes the culmination and pinnacle of our effort on the logic-gate program stemming from the principal grant F49620-97-1- 0512 This work began with the concept of all-optical spectral logic based on the polarization selection ... |
|
| Battle Force Email (BFEM) and other HF Issues |
17 NOV 2000 |
15 pages |
| Authors:
BOOZ-ALLEN AND HAMILTON INC MCLEAN VA
|
| This briefing is a description of the Battle Force E-mail 66 system. |
|
| Develop Equalization Techniques for Use with Bandwidth Efficient Modulation Methods |
01 NOV 2000 |
160 pages |
| Authors:
Sheila Horan; NEW MEXICO STATE UNIV LAS CRUCES
|
| Bandwidth is a precious commodity. In order to make the best use of what is available, better modulation schemes need to be developed, or less data needs to be sent. This paper will investigate the option of sending less data via data compression. The structure and the entropy of the data determine how much lossless compression can be obtained for a given set of data. This paper shows the data ... |
|
| Transmission Control Protocol (TCP) Over Asynchronous Transfer Mode (ATM): A Simulation Study |
NOV 2000 |
56 pages |
| Authors:
Teunis J. Ott; James E. Burns; Larry H. Wong; BELLCORE MORRISTOWN NJ
|
| The main body of this final report is a discussion of network studies performed using a simulation tool which was enhanced under this contract. The interaction between Transmission Control Protocol (TCP) and Asynchronous Transfer Mode (ATM), in particular Available Bit Rate (ABR), was studied. |
|
| IRIG J Asynchronous ASCII Time Code Formats |
NOV 2000 |
8 pages |
| Authors:
RANGE COMMANDERS COUNCIL WHITE SANDS MISSILE RANGE NM TELE- COMMUNICATIONS GROUP
|
| This standard describes a family of American Standard Code for Information Interchange (ASCII) time formats to be used to transfer time over conventional asynchronous telecommunications circuits. |
|
| All Optical Binary Flip-Flop Gate for Photonic Serial to Parallel Interfaces |
NOV 2000 |
2 pages |
| Authors:
William W. Clark III; UNIVERSITY OF CENTRAL FLORIDA ORLANDO CENTER FOR RESEARCH IN ELECTRO-OPTICS AND LASERS
|
| This project addresses key component technologies for enabling the fusion of data between the transmission lines and the receivers in optical communication network systems. This year involved the optimization and testing of an integrated flip-flop device, fabrication of an integrated divide-by-8 optical clock counter/sequencer, and development of a serial to parallel converter. |
|
| Telemetry Systems and Electric Gun Projectiles |
OCT 2000 |
28 pages |
| Authors:
William P. D'Amico; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Using telemetry in gun-launched projectiles is not as common as it is in missile and aircraft systems. A primary reason is the launch environment of guns. Conventional solid propellant guns often produce launch accelerations approaching 100,000 g's. Additionally, if the bore is rifled, large lateral accelerations are also produced. Recently, the Hardened Subminiature Telemetry and Sensor System (HSTSS) program developed and demonstrated a series of ... |
|
Telemetry
