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Works: 329 works in 360 publications in 1 language and 595 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 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)
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 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 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)
Analysis of Knowledge-Based Expert Systems as Tools for Construction Design ( file )
1 edition published in 1991 in English and held by 2 libraries worldwide
Because construction costs are continuously rising, Congress mandated that those within the respective branches of military service who are responsible for planning and executing construction programs develop policies and procedures that ensure that the individual projects are designed, bid, and constructed as rapidly as possible. This requires an approach that demands maximum efficiency from the design process. Reviews are necessary to ensure that designs meet all requirements, but the reviews themselves must be conducted in the least amount of time so as to preclude delays. Design tools that increases efficiency are knowledge-based expert systems which are interactive computer programs that incorporate judgement, experience, rules of thumb, and other expertise, so as to provide knowledgeable advice about a specific domain. They mimic the thought process employed by a human expert in solving a problem
Augmentation Awards for Science and Engineering Training (AASERT) ( Book )
2 editions published in 1999 in English and held by 1 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
Integrated Automatic Target Detection from Pixel-Registered Visual-Thermal-Range Images ( Book )
2 editions published in 1998 in English and held by 1 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
ARL Intranet Analysis and Development Study by Dana L Ulery( Book )
2 editions published in 1999 in English and held by 1 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
User Interfaces for Cooperative Remote Design ( Book )
3 editions published between 1997 and 1998 in English and held by 1 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 ( Book )
2 editions published in 1997 in English and held by 1 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
Introspective Reasoning Models for Multistrategy Case-Based and Explanation ( Book )
2 editions published in 1997 in English and held by 1 library worldwide
On the technical front, we have been working towards using the StatLady system as the starting point for implementing our own ideas. By using StatLady, we can make use of the system's large body of domain information, its capacity for evaluating a student's comprehension of a large number of definitions, procedures, and skills related to statistics, and its tutoring algorithms. We are exploring several options for an interface, including Visual Basic, the language of the original StatLady system. On the theoretical side, we have focussed on designing our planning to tutor module, based on the PLUTO planning to learn system, for augmenting StatLady along the lines of our proposal. Our extension builds on the strengths of StatLady by expanding the way StatLady represents the student model, the way it creates a lesson plan, and the flexibility it has to adapt a lesson plan as student performance deviates from the student model's predictions
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 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
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 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
Integrated Diagnostics ( Book )
3 editions published between 1997 and 1999 in English and held by 1 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
Applications of Multiconductor Transmission Line Theory to the Prediction of Cable Coupling. Volume 5. Prediction of Crosstalk Involving Twisted Wire Pairs ( file )
1 edition published in 1978 in English and held by 0 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
Applications of Multiconductor Transmission Line Theory to the Prediction of Cable Coupling. Volume 7. Digital Computer Programs for the Analysis of Multiconductor Transmission Lines ( file )
1 edition published in 1977 in English and held by 0 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
Information-Based Multisensor Detection ( file )
2 editions published between 2000 and 2001 in English and held by 0 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
A Study of the Relationship Between Macroscopic Measures and Physical Processes Occuring During Crack Closure ( file )
2 editions published between 1991 and 1995 in English and held by 0 libraries worldwide
This report is divided into Parts A and B which cover the numerical modeling with supporting fractography and the high resolution x-ray computed tomography of loaded samples, respectively. The figures for each part immediately follow the text of that part. The focus throughout is to relate macroscopic measures of crack closure to the physical-processes occurring at and near the crack tip. The most significant accomplishments of the program detailed in Part A include the following. Roughness-induced crack closure was characterized by fractographic analysis. The crack tip stress parameter, K, was justified as a forcing function at the crack tip in the roughness-induced crack closure problem. Analytical models were developed to predict the closure stress intensity factor as a function of crack length using a "phenomenological approach." The relations between fractographically measured parameters and the crack driving "force" was investigated. (MM)
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 ( file )
1 edition published in 1978 in English and held by 0 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
Graph minors : structure theory and algorithms by Roy Thomas( file )
3 editions published between 1993 and 1996 in English and held by 0 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
Blind adaptive dereverberation of speech signals using a microphone array by Tariq Saad Bakir( file )
1 edition published in 2003 in English and held by 0 libraries worldwide
Presentation on blind adaptive dereverberation of speech signals using a microphone array
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