WorldCat Identities

GEORGIA INST OF TECH ATLANTA

Overview
Works: 323 works in 354 publications in 1 language and 571 library holdings
Publication Timeline
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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)
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
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)
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)
Study and analysis of speech parameters and display techniques( Book )

1 edition published in 1968 in English and held by 2 WorldCat member libraries worldwide

The research demonstrated the feasibility of the hybrid system approach to automatic speech processing. In particular, this approach appears suitable for acquiring statistics regarding a variety of acoustic properties of monosyllabic utterances over very large sample populations in a rapid and efficient manner. On the basis of experimental runs made with several types of normalization and scaling, it is concluded that the following procedure should be adopted in any further processing of data with the present hybrid system. It is felt that vectorgrams produced by the procedure used would be readily amenable to automatic pattern-recognition programming on the digital computer. (Author)
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
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
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
Individual Feedback Propensities and Their Effects on Motivation, Training Success, and Performance by David M Herold( Book )

2 editions published in 1997 in English and held by 1 WorldCat member library worldwide

This research project had as its goal the development, validation, and field testing of new measures of individual differences that assess people's propensities to seek, generate, or interpret performance feedback information in a particular way. Specifically, based on preliminary work, it was thought that internal and external propensities exist that make individuals more or less likely to prefer, rely on, seek, or attend to primarily internally or externally generated performance cues. These propensities, if identified and measured, would be related to skill acquisition, performance improvement, self regulatory processes, performance maintenance, as well as a variety of affective and cognitive responses to performance settings based on the interaction of the performer's feedback predispositions and the characteristics of the feedback available. In summary, this study proposed to help one better understand the role of dispositions in explaining how different individuals go about shaping their feedback environment, processing feedback information, and responding to such information. The driving belief behind this line of research has been that individuals differ in ways that are specific to their orientation toward performance feedback situations, and that such differences, if identified and appropriately measured, would be valuable in better understanding the links between feedback and performance as well as other outcomes of interest
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
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
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
The Role of Self-Esteem and Self-Efficacy in Detecting Responses to Feedback( Book )

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

Our research on the relationships between individual differences, feedback seeking, and reactions to feedback sought to identify and clarify the existing state of knowledge concerning these relationships. We identified five individual difference variables that have historically been included in empirical feedback studies. These are: self-esteem, self-efficacy, locus of control, achievement need, and tolerance for ambiguity. Within the identified research, feedback-related responses were classified into five categories: affective reactions to feedback (e.g., satisfaction with the feedback), cognitive reactions to feedback (e.g., perceived accuracy), feedback monitoring (i.e., using indirect methods such as observing others to gain some performance information), feedback seeking (i.e., asking others for feedback), and other behaviors (often including performance following the receipt of feedback). The results of this investigation are summarized in Appendices A through E. In each appendix, the relationship between an individual difference and the responses given above are outlined. More specifically, the results for self-esteem are contained in Appendix A, for self-efficacy in Appendix B, for locus of control in appendix C, for tolerance for ambiguity in Appendix D, and need for achievement in Appendix E
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
Intelligent Turbine Engines( Book )

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

This study investigated technologies needed for the development of advanced turbine engines (TE) control systems that could improve TE performance and safety and reduce ownership cost. Since such control systems generally consist of one or more sensors, a control system and one or more actuators, this program investigated novel approaches for improved sensing, control and actuation in TE combustors and compressors. A multidisciplinary team of faculty from the school of Aerospace, Electrical and Computer and Mechanical engineering performed this study. Notable accomplishments of this program include: high temperature, wireless MEMS sensors, optical approaches for real time monitoring of combustor efficiency and pattern factor, 3, a 'smart' fuel injector for controlling combustor performance, a synthetic jet actuator for improved combustor mixing processes and pattern factor, nonlinear robust and adaptive controllers for combustion and compression systems, a Neural Network Chip for controlling combustion instabilities, LES and CFD for modeling unsteady combustor and compressor flows, respectively, and active control approaches for unstable compressors
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
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 and 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
Applications of Multiconductor Transmission Line Theory to the Prediction of Cable Coupling. Volume 5. Prediction of Crosstalk Involving Twisted Wire Pairs( )

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

A transmission line model of the twisted wire pair is presented which may be used to compute electromagnetic coupling between the twisted wire pair and other circuits. The model is derived by representing the transmission line for the twisted wire pair as a cascade of uniform loops and 'abruptly' nonuniform twists. The overall transmission line matrix is found by cascading the chain parameter matrices, which represent the loops, with the permutation matrices, that represent the twists. Comparisons are presented between the twisted wire pair, the straight wire pair, and the single wire circuit configurations to determine the relative effectiveness in the reduction of electromagnetic coupling. Experimental results are compared to the model predictions which verify that the chain parameter model is accurate to within + or - 3 dB for frequencies such that the line is electrically short (i. e. 1/10 lambda). Finally a second model, the low frequency model, is presented and is shown to be as accurate as the chain parameter model in the prediction of coupling at low frequencies. This low frequency model is very appealing in that it is conceptually much easier to model and also less time consuming, computationally
 
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English (44)