WorldCat Identities


Works: 330 works in 361 publications in 1 language and 582 library holdings
Genres: Academic theses 
Publication Timeline
Most widely held works by GEORGIA INST OF TECH ATLANTA
Complex Metal Hydrides. High Energy Fuel Components for Solid Propellant Rocket Motors( Book )

7 editions published between 1971 and 1978 in English and held by 7 WorldCat member libraries worldwide

Work has continued concerning the preparation and structure elucidation of complex metal hydrides of the main group elements. Research papers are contained in the Appendix of the report. Major developments include: A direct synthesis of iminoalanes, (RNA1H)n compounds. These compounds should be excellent candidates as high energy binders. New complex metal hydrides of magnesium, zinc and copper have been prepared. These compounds should be excellent candidates as high energy propellants and burning rate accelerators. The development of a high vacuum DTA0TGA for the study of the decomposition of complex metal hydrides. A solution to the problem of the existence of HMgA1H4 and NaA1H4 with organomagnesium compounds. (Author)
Investigation of Intermodulation Products Generated in Coaxial Cables and Connectors( Book )

1 edition published in 1982 in English and held by 2 WorldCat member libraries worldwide

This program was performed to investigate the parameters that may affect the generation of intermodulation (IM) products within typical coaxial cables and connectors. The parameters investigated include physical and material properties of the test components as well as electromagnetic properties of the applied signals. A repeatable measurement scheme capable of measuring very low level IM products was developed and evaluated. This test setup was used to measure the IM levels producted by 83 test samples selected to be representative of the coaxial cables and connectors employed on Command, Control, and Communications (C3) platforms. Mathematical models were developed which describe the IM behavior of these cables and connectors as a function of the various parameters investigated. In order to verify the cable-connector model, the IM levels of 21 additional test samples were predicted and then measured. The cable-connector combination model effectively predicts the IM levels within + or -4 dB as a function of each parameter except frequency; it predicts the variation with frequency to within 10 dB over the 20 to 450 MHz frequency range. (Author)
Performance Analysis of Hybrid ARQ Protocols in a Slotted Code Division Multiple-Access Network by Joseph M Hanratty( Book )

1 edition published in 1989 in English and held by 2 WorldCat member libraries worldwide

A link throughput-delay analysis is presented for a slotted direct-sequence spread-spectrum multiple-access packet radio network (PRN) operating in the presence of background noise, multiple-access interference, and pulsed jammer noise. The PRN is comprised of an arbitrary number of full-duplex radio units arranged in a paired-off topology. Slotted ALOHA random access is used in conjunction with CDMA for channel access and a type I hybrid ARQ is used for error control. Expression are derived for the link throughput-delay in terms of the channel cutoff rate and capacity. With the friendly objective of maximizing the link throughput, and the enemy objective of minimizing the link throughput, the dependency of the optimal retransmission probability, processing gain, code rate, and jamming fraction on the population size, traffic intensity, bit energy-to-background-noise ratio, is examined in detail. It is shown that properly designed (optimized) PRN using random-access CDMA offers a significantly larger heavy load throughput than a random-access PRN. Theses. (RH)
Extreme Values of Queues, Point Processes and Stochastic Networks( Book )

2 editions published in 1985 in English and held by 2 WorldCat member libraries worldwide

Work progressed on four topics. In modeling of stochastic flows in networks, compound Poisson approximations for random variables and point processes were developed. In extremal problems in stochastic networks, a family of bounds for the distributions of certain generic random variables were obtained. In optimization of queueing systems, progress was made in determining ways to control or dampen extremes of queues. Finally, research was begun on extreme values of queues and point processes. (Author)
Modeling Crosstalk on Printed Circuit Boards( Book )

1 edition published in 1985 in English and held by 2 WorldCat member libraries worldwide

The modeling of crosstalk on printed circuit boards is investigated. The emphasis is on simple models for use in CAD/CAM codes. Several simple models are developed. Their predictions are assessed for typical printed circuit board dimensions and interfering signals. The model predictions are compared to those of conventional lumped-circuit iterative models as well as experimental results. Also included are similar results for a ribbon cable. Keywords: Printed circuit board, Crosstalk, Coupling, Transmission Lines, Ribbon Cable, and Electromagnetic Compatibility
Integrated Diagnostics( Book )

3 editions published between 1997 and 1999 in English and held by 1 WorldCat member library worldwide

This document summarizes activity concerning the performance of basic research being conducted in the area of Integrated Diagnostics, a term associated with the technologies and methodologies used to determine how mechanical failures occur, and how they can be detected, predicted, and diagnosed in real time. Objectives, set forth through a Department of Defense Multidisciplinary Research Program of the University Research Initiative (M-URI), are being addressed by faculty and staff from the Georgia Institute of Technology, Northwestern University, and the University of Minnesota. Fourth year accomplishments and plans are reported upon. During this reporting period, experiments based on material, load, and vibration information from critical rotorcraft components continued so as to collect data of relevance in understanding the mechanisms of small crack growth for use in developing fatigue failure models. Such models serve as a guide in the selection and development of sensors to detect faults and pending failures. Effort has been placed on sensor development, and achieving the means to analyze and correlate reliable sensor output for operator use. Organizationally, this activity is being accomplished through (11) projects, categorized by the thrust areas of (1) Mechanical System Health Monitoring, including microsensor development and the condition monitoring of rotordynamic elements; (2) Nondestructive Examination Technology; and (3) Material Failure Characterization and Prediction Methodology
F-15 Tail Buffet Alleviation: A Smart Structure Approach( Book )

2 editions published in 1998 in English and held by 1 WorldCat member library worldwide

In high performance twin-tail aircraft fighter aircraft (HPTTA), tail buffet was first noticed through its destructive effects of induced fatigue cracks in the F-15 aircraft. The fatigue cracks were noticed shortly (less than six months) after the F-15 was placed in service and many high angles of attack maneuvers were executed. After repeated temporary structural fixes, a thorough investigation of the conditions leading to the crack confirmed that tail buffet is the cause of these effects. There are two significant effects of the buffet induced tail vibrations. These vibrations can restrict the flight maneuvering capability by restricting the angles of attack and speeds at which maneuvers such as the wind-up and wind-down turns can be executed. The second effect is caused by fatigue cracks and the resulting corrosion due to moisture absorption through the cracks. The objective of this work is to describe the results of our work in the area of buffet alleviation by the use of piezoceramic stack actuator assemblies
Intelligent Turbine Engines( Book )

2 editions published between 2001 and 2002 in English and held by 1 WorldCat member library worldwide

This program focuses on the fundamental and practical issues that hinder development of intelligent control systems for improving the performance of turbine engines, such as rotorcraft turboshaft engines. Our approach to the development of an intelligent control system has focused on advances in the basic understanding of engine processes through experiments and advanced computational models, refinement of appropriate sensor and actuator technologies, and development of practical control strategies for control of steady-state and transient performance. Substantial advances have been made on: unsteady modeling of compressor and combustor flows, control strategies for compressor surge and stall; combustor control using synthetic jets and smart fuel injectors; model-based, fuzzy logic and neural network control approaches; and MEMS and optical sensors able to operate in high temperature environments. In this report, we highlight advances in simulations, control theory, and compressor control (since last year's report focused on sensor and actuator technologies)
Measurement of Lung Vibration from Low Frequency Underwater Sound in an Animal Model and Divers Using NIVAMS( Book )

3 editions published between 1998 and 1999 in English and held by 1 WorldCat member library worldwide

The attached report covers the activities performed in the past year. These include the design, fabrication, and testing of a travelling wave chamber for the controlled exposure of small mammals to underwater low frequency sound. They also include preparations for an experiment which is to be performed on divers in October 1998
ARL Intranet Analysis and Development Study by Dana L Ulery( Book )

2 editions published in 1999 in English and held by 1 WorldCat member library worldwide

We analyze the concept and practice of Intranets used in midsize and large enterprises, focusing on their use and impact within research and development (R & D) organizations. We examine the shift from the old concept of business computing to the modern concept of enterprise computing, and consider Intranets-a class of enterprise computing-relative to enterprise computing trends. By analyzing in detail some case studies selected from the literature, on-site visits, and workshop discussions, we then offer three tools to frame the critical issues and provide structure for systematically constructing strategic Intranets specific to a given organization's mission and culture. Arguing that creation of an Intranet that projects an image of a world-class organization demands no less than a world-class enterprise that is strategically enabled through information technology, we then analyze the current U.S. Army Research Laboratory (ARL) Intranet and present a three-step action plan to expedite ARL's movement toward creation of such an Intranet
Integrated Automatic Target Detection from Pixel-Registered Visual-Thermal-Range Images( Book )

2 editions published in 1998 in English and held by 1 WorldCat member library worldwide

This paper outlines a method to automatically detect targets from sets of pixel registered visual, thermal, and range images. The method uses operations specifically designed for the different kinds of images. It also introduces the morphological operation called erosion of strength n as a powerful tool for removal of spurious information. Good preliminary results obtained for detection support its suitability for application to the Automatic Target Recognition (ATR) problem
Final Report Summer Intern Program( Book )

2 editions published in 1998 in English and held by 1 WorldCat member library worldwide

This report summarizes the summer internship program conducted in 1996, supported by an ONR grant (N00014-92-J-1828, Georgia Tech budget C36-542). The report describes the work undertaken by the students, results of the program, and future plans. Overall, the internship program was a complete success. The goal of the internship program was to give socioeconomically disadvantaged undergraduate students an introduction to what graduate study in Computer Science is like and to encourage them to consider graduate education. A further goal was to build stronger relationships with local and national four year HBCUs (Historically Black Colleges and Universities). We also recruited students from HBCUs nationwide and worked in conjunction with the School of Electrical and Computer Engineering, which has a similar intern program, funded by the National Science Foundation. We worked very closely with local HBCU faculty to provide an internship program that was rewarding, challenging, enjoyable, and closely mentored
User Interfaces for Cooperative Remote Design( Book )

3 editions published between 1997 and 1998 in English and held by 1 WorldCat member library worldwide

Our objective in this research is to allow teams that are physically separated to do detailed design work on large-scale, 3D projects. The specific task is to enable multiple users to stand at each of two (or more) Virtual Workbenches at remote locations and interact effectively for design generation. Specific tasks completed include: (1) Organized and segmented the new Navy Arsenal Ship model; (2) Developed off-axis stereoscopic display and basic tracking mechanisms; (3) Developed an object data organization; (4) Generated nearly 1,000 3D objects and classified them using the data organization format; (5) Worked on several interaction paradigms, many of which are implemented in the design environment; (6) Developed a networking structure; and (7) Put together and are demonstrating a prototype design environment. In the coming year we will further study issues of collaboration and will also continue our work in enlarging and managing the set of objects in the ship design
Internal State Variable Models for Rate and Temperature History Dependent Behavior at Finite Strain( Book )

2 editions published in 1998 in English and held by 1 WorldCat member library worldwide

Under nonisothermal histories typical of metals under impact or deformation processing, dependence on the history of temperature and strain rate is potentially first order in terms of material response (McDowell & Voorhees, DSSG Report, IDA, 1995). The principal goal of this program has been to progress towards the next generation of ISV constitutive relations for thermoviscoplastic finite strain behavior of metals. The goals of this research program, which expired at the end of September 1998, were to explore: (1) more physically-based representation of the anisotropy of hardening and flow associated with development of dislocation substructure, including kinematical (deformation) as well as kinetics (flow) aspects; and (2) rate dependence of material strain hardening behavior for strain rates ranging from quasi-static to dynamic, with emphasis on temperature and strain rate history dependence, rather than just instantaneous temperature and strain rate dependence
Augmentation Awards for Science and Engineering Training (AASERT)( Book )

2 editions published in 1999 in English and held by 1 WorldCat member library worldwide

This report documents in summary format the research performed under the AASERT grant N00014-96-1-1018. The AASERT parent grant is the ONR contract for the Conformal Acoustic Velocity Sonar (CAVES). Three graduate students were supported by this grant and they performed research in nearfield array measurements and Laser Doppler Vibrometry (LDV) in the presence of a large acoustic excitation
Applications of Multiconductor Transmission Line Theory to the Prediction of Cable Coupling. Volume 6. A Digital Computer Program for Determining Terminal Currents Induced in a Multiconductor Transmission Line by an Incident Electromagnetic Field( )

1 edition published in 1978 in English and held by 0 WorldCat member libraries worldwide

The report describes a digital computer program which is designed to compute the terminal currents induced in a multiconductor transmission line by an incident electromagnetic field. Sinusoidal steady state behavior of the line is assumed. The transmission line is uniform and consists of n wires and a reference conductor immersed in a homogeneous, lossless, linear, isotropic medium. The n wires and the reference conductor are assumed to be lossless. The reference conductor may be a wire, an infinite ground plane or an overall, cylindrical shield. The incident electromagnetic field may be a uniform plane wave or a general nonuniform field. The primary restriction on the program validity is that the cross sectional dimensions of the line, e.g., wire separation, must be much less than a wavelength
Applications of Multiconductor Transmission Line Theory to the Prediction of Cable Coupling. Volume 7. Digital Computer Programs for the Analysis of Multiconductor Transmission Lines( )

1 edition published in 1977 in English and held by 0 WorldCat member libraries worldwide

Four digital computer programs, XTALK, XTALK2, FLATPAK, FLATPAK2, for determining the electromagnetic coupling within an (n+1) conductor, uniform transmission line are presented. Sinusoidal steady state behavior of the line as well as the TEM or 'quasi-TEM' mode of propagation are assumed. XTALK and XTALK2 consider lines consisting of n wires (cylindrical conductors) and a reference conductor. The surrounding medium is homogeneous and lossless. XTALK assumes that all (n+1) conductors are perfect conductors whereas XTALK2 considers the conductors to be lossy. There are three choices for the reference conductor: a wire, a ground plane, an overall cylindrical shield. FLATPAK and FLATPAK2 consider (n+1) wire ribbon (flatpack) cables in which all wires are identical and are coated with cylindrical, dielectric insulations of identical thicknesses. All wires lie in a horizontal plane and all adjacent wires are separated by identical distances. FLATPAK considers the wires to be perfect conductors and FLATPAK2 considers the wires to be lossy. The dielectric insulations are considered to be lossless. General termination networks are provided for at the ends of the line and the programs compute the voltages (with respect to the reference conductor) at the terminals of these termination networks for sinusoidal steady state excitation of the line
Blind adaptive dereverberation of speech signals using a microphone array by Tariq Saad Bakir( )

1 edition published in 2003 in English and held by 0 WorldCat member libraries worldwide

This thesis describes a blind adaptive method for the dereverberation of speech (audio) signals in a closed room environment using multiple microphones, and by using the second-order statistics (correlations) of the reverberated speech signal
Information-Based Multisensor Detection( )

2 editions published between 2000 and 2001 in English and held by 0 WorldCat member libraries worldwide

This program addresses the Navy need for extended firm track range for low altitude cruise missiles through the integration of multiple sensors. Track Before Declare (TBD) techniques that utilize signal features are proposed for the synergistic integration of an Electronically Scanned Array (ESA) radar with other sensors for the detection of weak targets. The computer simulation models of the sensors will include the effects of many issues such as finite sensor resolution, limitations on the sensor resources, atmospheric refraction, sensor pointing errors, sea surface induced multipath, nonhomogeneous clutter, sea clutter, etc. that are omitted in most of the legacy simulations. The two primary accomplishments for the first year of this program were the development of a phased array radar model with search and track management functions for multiple targets as well as the development of a sea clutter model with moving target indictor (MTI) waveform designs
Graph minors structure theory & algorithms by Roy Thomas( )

3 editions published between 1993 and 1996 in English and held by 0 WorldCat member libraries worldwide

There have been significant developments in Graph Theory over the last decade that imply the existence of polynomial time algorithms for a large class of problems. These results, however, guarantee the existence of polynomial-time algorithms to solve various problems, but give no hint how to find one. Yet another drawback of these algorithms is that even though they are theoretically fast (O(n2) or O(n3)), the constant hidden in the 0 notation is so enormous that it makes the algorithms impractical. The purpose of this project is to (1) further develop this theory and obtain more theoretical results, (2) apply these results to the design of (at least theoretically) efficient algorithms, and (3) turn these theoretically efficient algorithms into practical ones
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English (43)