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Articles 31 - 60 of 91
Full-Text Articles in Computer Engineering
Novel Kalman Filtering Method For The Suppression Of Gyroscope Noise Effects In Pointing And Tracking Systems, Marcelo C. Aigrain
Novel Kalman Filtering Method For The Suppression Of Gyroscope Noise Effects In Pointing And Tracking Systems, Marcelo C. Aigrain
Department of Electrical and Computer Engineering: Faculty Publications
A primary cause of degraded performance in pointing and tracking systems is the jitter in the line of sight. This jitter is caused by the residual angular motion of the stabilized platform within the system. A major contributor to this residual motion is the gyroscope noise. Thus, to reduce angular jitter, lower-noise gyroscopes are selected, generally at a premium cost. Another approach is to enhance the accuracy of the gyroscopes electronically (by suppressing measurement noise) before their outputs are fed into the stabilized platform control system. Optimal filtering techniques can be used for this purpose. The goal is to estimate …
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 11, Number 3, March 1995, College Of Engineering And Computer Science, Wright State University
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 11, Number 3, March 1995, College Of Engineering And Computer Science, Wright State University
BITs and PCs Newsletter
A fourteen page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.
Study Of The Subjet Structure Of Quark And Gluon Jets, D. Buskulic, D., M. Thulasidas
Study Of The Subjet Structure Of Quark And Gluon Jets, D. Buskulic, D., M. Thulasidas
Research Collection School Of Computing and Information Systems
Measurements of the subjet structure of quark and gluon jets in hadronic Z decays are presented. The analysis is based on one million hadronic events recorded by the Aleph detector. Roughly symmetric three-jet events are selected with a coarse jet-resolution cut-off, y1. Gluon jets are identified with a purity of 94.6% in those events where evidence of long-lived heavy-flavour hadrons in the other two jets is found. The jets are then analyzed using a smaller cut-off y0 (< y1) so that subjets are resolved. The properties of the jets (subjet multiplicities (Nq), (Ng) and rates Rng(q) for n = 1, 2, 3, 4) are determined and are found to be in good agreement with the expectations of perturbative QCD as long as the subjet resolution parameter y0 is sufficiently large to keep non-perturbative effects small. In particular, the ratio , which to leading order in QCD is given by the ratio of colour factors , is measured to be 1.96 ± 0.15 for y0 = 2 · 10−3, but falls to 1.29 ± 0.03 for y0 = 1.6 · 10−5.
Apparatus For Forming Fine Particles, Dennis R. Alexander
Apparatus For Forming Fine Particles, Dennis R. Alexander
Department of Electrical and Computer Engineering: Faculty Publications
To alter feedstock material, the material is exposed to laser radiation applied at a selected angle of incidence, intensity and wavelength related to the refractive index of the feedstock material. Fine uniform particles may be formed through vapor explosion and/or plasma formation and used by this method to coat surfaces, such as with paint or adhesive or to supply uniform small particles to a heat engine. Moreover, moving materials such as a column of liquid may be subjected to high internal pressure and temperature for creating physical and chemical changes.
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 11, Number 2, February 1995, College Of Engineering And Computer Science, Wright State University
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 11, Number 2, February 1995, College Of Engineering And Computer Science, Wright State University
BITs and PCs Newsletter
An eighteen page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.
Losslees Compression Of Rgb Color Images, Nasir D. Memon, Khalid Sayood
Losslees Compression Of Rgb Color Images, Nasir D. Memon, Khalid Sayood
Department of Electrical and Computer Engineering: Faculty Publications
Although much work has been done toward developing lossless algorithms for compressing image data, most techniques reported have been for two-tone or gray-scale images. It is generally accepted that a color image can be easily encoded by using a gray-scale compression technique on each of the three accounts the substantial correlations that are present between color planes. Although several lossy compression schemes that exploit such correlations have been reported in the literature, we are not aware of any such techniques for lossless compression. Because of the difference in goals, the best way of exploiting redundancies for lossy and lossless compression …
Webwork: Integrated Programming Environment Tools For National And Grand Challenges, Geoffrey C. Fox, Wojtek Furmanski, Marina Chen, Claudio Rebbi, James H. Cowie
Webwork: Integrated Programming Environment Tools For National And Grand Challenges, Geoffrey C. Fox, Wojtek Furmanski, Marina Chen, Claudio Rebbi, James H. Cowie
Physics - All Scholarship
Challenging-scale problems consistently demand solutions that fuse geographically distributed and heterogeneous data, personnel, expertise, and resources. For example, national health care problems require collaboration among experts of fields as diverse as medical informatics, public policy, robotics, and high performance computing to solve problems ranging from telemedicine to cost management and quality control. Indeed, many National Challenges include Grand Challenges as subcomponents. We can pose the Integrated Challenge as the solution of etaproblems hosted on world-wide metacomputers linking all three aspects: simulation, information processing, and collaboration. We suggest a hybrid approach to Integrated Challenges that combines World-Wide Web (WWW) technologies with …
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 11, Number 1, January 1995, College Of Engineering And Computer Science, Wright State University
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 11, Number 1, January 1995, College Of Engineering And Computer Science, Wright State University
BITs and PCs Newsletter
A fourteen page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.
An Organizational Learning Approach To Domain Analysis, Scott Henninger, Kris Lappala, Anand Raghavendran
An Organizational Learning Approach To Domain Analysis, Scott Henninger, Kris Lappala, Anand Raghavendran
CSE Conference and Workshop Papers
As the application of computer technology continues to proliferate and diversify, the identification and understanding of application domains is becoming increasingly important to software development methodologies. Domain analysis techniques have been developed to accumulate and formalize the knowledge necessary for successful software reuse. These techniques have been shown to be useful, but suffer from defining the domain too restrictively, burying important relationships deep in domain taxonomies, and prohibiting flexible identification of domains with common issues. Techniques are needed that dynamically detect recurring patterns of activities in development projects. This paper presents a method for developing and refining the knowledge and …
Book Review: Reasoning Agents In A Dynamic World: The Frame Problem. Kenneth M. Ford And Patrick J. Hayes, Eds.,, Jozsef A. Toth
Book Review: Reasoning Agents In A Dynamic World: The Frame Problem. Kenneth M. Ford And Patrick J. Hayes, Eds.,, Jozsef A. Toth
Jozsef A Toth Ph.D.
No abstract provided.
A Single-Stroke Orientation-Orient Gesture System, Yike Hu
A Single-Stroke Orientation-Orient Gesture System, Yike Hu
All Computer Science and Engineering Research
No abstract provided.
Using Matlab To Illustrate The 'Phenomenon Of Aliasing', Sol Neeman, Ph.D.
Using Matlab To Illustrate The 'Phenomenon Of Aliasing', Sol Neeman, Ph.D.
Engineering Studies Faculty Publications and Creative Works
The phenomenon of aliasing is important when sampling analog signals. In cases where the signal is bandlimited, one can avoid aliasing by ensuring that the sampling rate is higher than the Nyquist rate . But in cases where the signal is not bandlimited , aliasing is unavoidable if the signal is not filtered before it is sampled. It is then crucial to understand the phenomenon in order to estimate the distortion generated when the signal is reconstructed from its samples. Using the software package MATLAB by MathWorks, Inc ., two examples are presented. The first is a pure sinusoid which …
Software And Hardware Requirements For Some Applications Of Parallel Computing To Industrial Problems, Geoffrey C. Fox
Software And Hardware Requirements For Some Applications Of Parallel Computing To Industrial Problems, Geoffrey C. Fox
Northeast Parallel Architecture Center
We discuss the hardware and software requirements that appear relevant for a set of industrial applications of parallel computing, these are divided into 33 separate categories, and come from a recent survey of industry in New York State. The software discussions includes data parallel languages, message passing, databases, and high-level integration systems. The analysis is based on a general classification of problem architectures originally developed for academic applications of parallel computing. Suitable hardware architectures are suggested for each application. The general discussion is crystalized with three case studies: computational chemistry, computational fluid dynamics, including manufacturing, and Monte Carlo Methods.
Techniques For Scheduling I/O In A High Performance Multimedia-On-Demand Server, Divyesh Jadav, Chutimet Srinilta, Alok Choudhary, P. B. Berra
Techniques For Scheduling I/O In A High Performance Multimedia-On-Demand Server, Divyesh Jadav, Chutimet Srinilta, Alok Choudhary, P. B. Berra
Electrical Engineering and Computer Science - All Scholarship
One of the key components of a multi-user multimedia-on-demand system is the data server. Digitalization of traditionally analog data such as video and audio, and the feasibility of obtaining network bandwidths above the gigabit-per-second range are two important advances that have made possible the realization, in the near future, of interactive distributed multimedia systems. Secondary-to-main memory I/O technology has not kept pace with advances in networking, main memory and CPU processing power. Consequently, the performance of the server has a direct bearing on the overall performance of such a system. In this paper we present a high-performance solution to the …
Runtime Support For In-Core And Out-Of-Core Data-Parallel Programs, Rajeev Thakur
Runtime Support For In-Core And Out-Of-Core Data-Parallel Programs, Rajeev Thakur
Electrical Engineering and Computer Science - All Scholarship
Distributed memory parallel computers or distributed computer systems are widely recognized as the only cost-effective means of achieving teraflops performance in the near future. However, the fact remains that they are difficult to program and advances in software for these machines have not kept pace with advances in hardware. This thesis addresses several issues in providing runtime support for in-core as well as out-of-core programs on distributed memory parallel computers. This runtime support can be directly used in application programs for greater efficiency, portability and ease of programming. It can also be used together with a compiler to translate programs …
Efficient Axis And Circle Detection Through Hough Transformation, Karissa E. Hobert
Efficient Axis And Circle Detection Through Hough Transformation, Karissa E. Hobert
Presidential Scholars Theses (1990 – 2006)
Computer vision and human vision are quite different. While a person can look at an object and easily recognize it, a computer is does not understand the the objects it is seeing. Finding axes and circles in an image is an intermediate step in designing a machine with the ability to recognize shapes and objects. Through the utilization of contour and smoothed local symmetry information, the main axes of an image are determined and may be used to facilitate shape and object analysis. A Hough transform algorithm detects the most popular lines from a set of candidate axis points. This …
Transient Data Sharing Among Mobile Programs, Jerome Plun, Gruia-Catalin Roman
Transient Data Sharing Among Mobile Programs, Jerome Plun, Gruia-Catalin Roman
All Computer Science and Engineering Research
Mobile computing represents a major point of departure from the traditional distributed computing paradigm. The potentially very large number of independent computing units, a decoupled computing style, frequent disconnections, continuous position changes, and the location-dependent nature of the behavior and communication patterns present designers with unprecedented challenges in the areas of modularity and dependability. This paper describes a modular approach to specifying and reasoning about of mobile computing. Its novelty rests with the notion of allowing transient (location-dependent) data sharing among programs which move in space. The notation is a direct extension of that used in UNITY and reasoning about …
An Efficient Signaling Structure For Atm Networks, Dakang Wu
An Efficient Signaling Structure For Atm Networks, Dakang Wu
All Computer Science and Engineering Research
As ATM becomes widely accepted as the communication standard for high speed networks, the signaling system structure and protocols that support ATM become more and more important. To support existing, future and unknown applications, the signalign system has to be very flexible and efficient. In this paper we define the signaling problem, present several possible signaling system structures, compare the advantages and disadvantages of these systems, and then we propose a new signaling system structure. The fundamental idea of the new signaling system is the logical separation of the signaling system structure from the underlying communication network, even though they …
Building Interactive Distributed Applications In C++ With The Programmers' Playground, Kenneth J. Goldman, T. Paul Mccartney, Ram Sethuraman, Bala Swaminathan And Todd Rogers
Building Interactive Distributed Applications In C++ With The Programmers' Playground, Kenneth J. Goldman, T. Paul Mccartney, Ram Sethuraman, Bala Swaminathan And Todd Rogers
All Computer Science and Engineering Research
No abstract provided.
Efficient Demultiplexing Of Network Packets By Automatic Parsing, Mahesh Jayaram, Ron K. Cytron
Efficient Demultiplexing Of Network Packets By Automatic Parsing, Mahesh Jayaram, Ron K. Cytron
All Computer Science and Engineering Research
Packet filters are a mechanism for efficiently demultiplexing network packets to application endpoints. There is currently no general, formal specification method for packet filters that allows for easy or efficient composition of specifications. In this paper we present an automatic approach that achieves all of these goals. We approach packet filter specification as a language recognition problem: each filter is represented by a context-free grammar, whose language is the set of packets the filter should accept. Thus, packet filters can be formulated through a general, well defined specification; further, the grammar-based approach simplifies filter composition, which is essential where scalability …
Master Of Science Degree Programs Computer Information Systems, Management Information Systems 1995, Nova Southeastern University
Master Of Science Degree Programs Computer Information Systems, Management Information Systems 1995, Nova Southeastern University
College of Engineering and Computing Course Catalogs
No abstract provided.
A General Approach To Boolean Function Decomposition And Its Application In Fpgabased Synthesis, Tadeusz Luba, Henry Selvaraj
A General Approach To Boolean Function Decomposition And Its Application In Fpgabased Synthesis, Tadeusz Luba, Henry Selvaraj
Electrical & Computer Engineering Faculty Research
An effective logic synthesis procedure based on parallel and serial decomposition of a Boolean function is presented in this paper. The decomposition, carried out as the very first step of the .synthesis process, is based on an original representation of the function by a set of r-partitions over the set of minterms. Two different decomposition strategies, namely serial and parallel, are exploited by striking a balance between the two ideas. The presented procedure can be applied to completely or incompletely specified, single- or multiple-output functions and is suitable for different types of FPGAs including XILINX, ACTEL and ALGOTRONIX devices. The …
Simtm Turing Machine Simulator, Yin Fu Chen
Simtm Turing Machine Simulator, Yin Fu Chen
Theses Digitization Project
No abstract provided.
Production Of Excited Beauty States In Z Decays, D. Buskulic, Manoj Thulasidas
Production Of Excited Beauty States In Z Decays, D. Buskulic, Manoj Thulasidas
Research Collection School Of Computing and Information Systems
A data sample of about 3.0 million hadronic Z decays collected by the ALEPH experiment at LEP in the years 1991 through 1994, is used to make an inclusive selection of B hadron events.
Hardware Implementation Of The Complex Hopfield Neural Network, Chih Kang Cheng
Hardware Implementation Of The Complex Hopfield Neural Network, Chih Kang Cheng
Theses Digitization Project
No abstract provided.
Convergence Properties Of Perceptrons, Ratnasri Krishna Adharapurapu
Convergence Properties Of Perceptrons, Ratnasri Krishna Adharapurapu
Theses Digitization Project
No abstract provided.
Maintaining High Throughput During Overload In Atm Switches, Jonathan S. Turner
Maintaining High Throughput During Overload In Atm Switches, Jonathan S. Turner
All Computer Science and Engineering Research
This report analyzes two popular heuristics for ensuring packet integrity in ATM switching systems. In particular, we analyze the behavior of packet tail discarding, in order to understand how the packet level link efficiency is dependent on the rates of individual virtual circuits and the degre of the imposed overload. In addition, we study early packet discard and show that the queue capacity needed to achieve high efficiency under worst-case conditions grows with the number of virtual circuits and we determine the efficiency obtainable with more limited queue capacities. Using the insights from these analyses, extensions to early packet discard …
Real-Time Upcalls: A Mechanism To Provide Real-Time Processing Guarantees, Raman Gopalakrishna, Guru M. Parulkar
Real-Time Upcalls: A Mechanism To Provide Real-Time Processing Guarantees, Raman Gopalakrishna, Guru M. Parulkar
All Computer Science and Engineering Research
Real-time upcalls (RTUs) are an operating systems mechanism that can be used by applications to efficiently schedule code segments (or handlers) that must execute periodically. While the mechanism was conceibed to support protocol processing with quality-of-service guarantees for networked multimedia applicatoins it is general enough to be applicable in other domains like real-time image processing. Until now real-time threads have been the only mechanism for implementing protocols in user space with QoS guarantees. The RTU mechanism avoids the implementation complexity of the thread based approach while retaining its ability to ensure real-time behavior. In addition, our design simplifies protocol code, …
Issues In Distributed Control For Atm Networks, Jonathan S. Turner
Issues In Distributed Control For Atm Networks, Jonathan S. Turner
All Computer Science and Engineering Research
Asynchronous Transfer Mode (ATM) network technology is expected to become a central part of the emerging global information infrastructure. ATM networks introduce a number of features that distinguish them from earlier technologies and introduce new issues in network control. This paper offers a framework for precisely defining and analyzing alternative approaches to the distributed control of ATM networks and explores some of the key design issues through a series of examples. It is hoped that it will provide a useful foundation for researchers in networking and distributed computing interested in exploring these issues further and developing more complete solutions.
Euphoria Reference Manual, T. Paul Mccartney, Kenneth J. Goldman
Euphoria Reference Manual, T. Paul Mccartney, Kenneth J. Goldman
All Computer Science and Engineering Research
No abstract provided.