Digital Commons Network^™

Csma/Cd Lan Performance : Modeling And Simulation In Csim, Nanda K. Kanuri

Theses

A simulation model to analyze the performance of CSMA/CD protocol is developed. CSIM, a process oriented simulation language, is used. Performance measures such as throughput, average delay and maximum delay per packet are presented. System performance is analyzed for different loads, number of stations, and network lengths, with packet length as parameter. By trading off the throughput and delay time, an optium packet length can be selected from simulated performance curves. A general scheme for MAC protocols modeling is provided.

Feasibiltiy, Planning, And Justification Of Fms : A Case Study, Joo Hwan Kim

Theses

FMS production technology, because of its ability to adjust to changes in product demands and produce at competitive costs even on small runs and at above quality levels, has caused its adoption by the major automobile manufacturers. These attributes are of particular interest to Korean automobile manufacturers who due to a small home market need to manufacture in relative small quantities and to export.

This paper considers how such a technology can be implemented. It discusses the key factors to be considered such as strategy, selection and design of the appropriate hardware and software, required organizational changes, and its economic …

A Dynamic Cmos Programmable Logic Device, Praveen K. Parvathala

Theses

This thesis presents the design of a Dynamic CMOS Programmable Logic Device chip (NJIT PLD). The main feature of the chip is its reconfigurability and the provision of a processor interface which makes the chip capable of performing coprocessor like functions. The chip has been designed to be used with the Intel 8088 microprocessor, but may also find stand-alone applications. Provision is made for dynamic reconfiguration of the chip. The configuration data for the chip comes from a serial PROM, to which the chip sends a synchronizing clock. The NJIT PLD is a high performance, digital integrated circuit. It has …

Trellis Encoded M-Ary Partial-Response Schemes, Raju P. Patel

Theses

Convolutional codes can be used to improve the reliability of partial-response channels in a Gaussian noise environment. Multilevel partial-response schemes can be used to increase the information rate in a given bandwidth compared to binary partial-response schemes. This thesis deals with the theory and construction of convolutionally encoded 4-ary partial- response schemes. The free Euclidean distance of the combined trellis of rate-1/2 convolutional code and 4-ary partial-response scheme is found through a computer search, using the Viterbi-algorithm.

The matched encoding concept is also applied to find the conditions for matched encoding for combined trellis of rate-1/2 convolutional codes and 4-ary …

Hardware And Software Designs For Integrated Electrical Engineering Experiments, Sujin Pramojaney

Theses

The interfacing between the various electrical engineering fields is not emphasized in the electrical engineering laboratory; the traditional aim of a laboratory course is to complement a single theoretical course. The object of this thesis is to provide means, hardware and software, that can be used in different system configurations to perform useful industrial tasks. The chosen task is to control electrical machines using a microcomputer. Experiments can be written to be performed by students, using these systems. The emphasize of these experiments can be on the characteristics of a power electronics device, but the device will be seen as …

Digital Image Restoration Using Power Spectrum Equalization Filtering Technique, Debdatta Sen

Theses

Digital deblurring of micro-circulatory images using both homomorphic and power spectrum equalization filtering are considered. An existing homomorphic filter was modified by changing filter parameters. This permitted an image with better contrast to be obtained. The power spectrum equalization approach consists of modeling and characterization of degradation and estimation of the power spectrum of the image using the Welch method. The restoration is considered from the point of view of spatial-frequency domain descriptions of images. Consideration is restricted to degradations arising from additive noise and spatially invariant linear blurring. The filter restores the power spectrum of the image to what …

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, May 1989, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Total Maximum Daily Loads And Waste Load Allocations For Las Vegas Bay: Rationale And Calulations, State Of Nevada: Division Of Environmental Protection

Publications (WR)

In September 1987 the Nevada Division of Environmental Protection revised Water Quality Standards for Las Vegas Wash (LVW) and Lake Mead. Standards were set for chlorophyll-a and unionized ammonia in Las Vegas Bay (LVB) (NDEP 1987). The 1986 and 1987 LVB data showed non-achievement of both the chlorophyll-a and unionized ammonia standard which triggered an analysis of total phosphorus and total ammonia Total Maximum Daily Loads and Waste Load Allocations which are presented in this report. This report is separated into three sections: 1. 1987 Las Vegas Bay Water Quality Conditions and Seasonal Periodicity. 2. Concentration Estimates at Northshore Road …

Mine Warfare In The Russian And Soviet Navies, Jeffrey K. Bray

Graduate Program in International Studies Theses & Dissertations

This thesis examines the development of technology, tactics, strategy, and organization of mine warfare in the Russian and Soviet navies from 1807 to the present. The author reviews the trials and tribulations of the development of naval mines and their employment within these two navies. This development has been primarily driven by the needs of war and advances of technology. In spite of occasional setbacks, the Russian and Soviet mine warfare forces continued to provide support to the overall naval and central policies of their respective governments. This support has often been during times of high tension and limited resources. …

Irish Building Services News

Building Services Engineering

No abstract provided.

An Evaluation Of The Plasma Frequency Probe, Charles Merrill Swenson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Electron density in a plasma can be measured by determining the plasma frequency. For 20 years this electron density measurement technique has been used with the plasma frequency probe. The purpose of this paper is to characterize, evaluate, and suggest improvements for this instrument. Although the current plasma frequency probe is a highly successful instrument for measuring absolute electron density in the ionosphere, several areas for improvement were found. These were in the radio frequency head and the voltage controlled oscillator. Currently, the plasma frequency probe is approximately 20% accurate in determining absolute densities around 1.5x10⁴ electrons/cm³ but …

College Of Engineering And Technology Bylaws 1989, Paul Savory

Department of Industrial and Management Systems Engineering: Reports

Attached are the Bylaw for the College of Engineering as approved April 21, 1989.

Santa Clara Magazine, Volume 31 Number 3, Spring 1989, Santa Clara University

Santa Clara Magazine

10 - VISION Santa Clara's new president talks about his priorities for the University in the decade ahead.

15 - FAMILY IN CRISIS Is the Silicon Valley family an endangered species?

18 - DUBLIN: CITY OF 1,000 YEARS Today it is a bustling European capital. But progress has come at a price.

22 - GEORGE AND THE SILVER FOX A behind-the-scenes look at President and Mrs. Bush.

27 - WHO SHALL CARE .. . AND HOW? By 2020 every fourth American may be 65 or over.

Agricultural Pesticide Hazard To Groundwater In Utah, Hubert Eisele, Majid Ehteshami, Richard C. Peralta, Howard M. Deer, Terry T. Tindall

Civil and Environmental Engineering Faculty Publications

We gratefully acknowledge the funding support of the Utah Department of Agriculture and the following offices at Utah State University. The Department of Agricultural and Irrigation Engineering, the International Irrigation Center, the Department of Animal, Dairy and Veterinary Sciences, the Department of Soil Science and Biometerology, and the University Extension Services.

Transient Hot-Film Sensor Response In A Shock Tube, Kelly Ryan Ortgies

Mechanical & Aerospace Engineering Theses & Dissertations

Shock tube experiments have been performed to determine the response of a hot-film sensor, mounted flush on the side-wall of a shock tube, to unsteady flow behind a normal shock wave. The present experiments attempt to isolate the response of the anemometer due only to the change in convective heat transfer at the hot-film surface. The experiments, performed at low supersonic shock speeds in air, are described along with the data acquisition procedure. The change in convective heat transfer i s deduced from the data and the results are compared with those from transient boundary-layer theory and another set of …

Irish Building Services News

Building Services Engineering

No abstract provided.

Acuta Enews April 1989, Vol. 18, No. 4

ACUTA Newsletters

In This Issue

President's Message

Party Line

User Groups

1989-90 Dues Notices

Gallaudet University

University of Missouri Adds Video Instruction To Beat The Highway Blue

Wake Forest University Telecommunitcations

Administrative Director's Office

Sky-high satisfaction with SkyDome contract

Acuta Enews March 1989, Vol. 18, No. 3

ACUTA Newsletters

In This Issue

Duke University Tel-Com

Bits & Pieces

President's Message

Administrative Director's Office

Palm Springs Seminar

Party Line

Digital Rebel

User Groups

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, March 1989, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

The Nusat I Project: Government, Industry And Academia Learning Together, Charles A. Bonsall

Robert "Bob" Twiggs STEM Education Collection

A report composed by Charles A. Bonsall on the history of the NUSat Project in March of 1989.

Bulletin - February, 1989, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

A six page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.

Acuta Enews February 1989, Vol. 18, No. 2

ACUTA Newsletters

In This Issue

President's Message

Party Line

Users Must Join The Standards Fray

Video Classroom

User Groups

Bits & Pieces

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, February 1989, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Traffic Signing For Local Areas, Herpicc

Indiana Local Technical Assistance Program (LTAP) Publications

One of the most important responsibilities of local street and highway departments is to provide the driving public with adequate, appropriate signs to permit safe travel over unfamiliar roads. Unfortunately, this responsibility is frequently neglected or, at best, under-emphasized. The most common excuse used to justify this neglect is inadequate funding, which is undoubtedly true. What is equally true, however, is that resurfacing roads and streets is more politically popular than re-signing them, even though resurfacing leads to increased speeds, which in turn can lead to increased accident experience on improperly or inadequately signed facilities.

This brief report is not …

A Methodology For Designing Spacecraft Onboard Processing Systems, Mohammad Nadeem Ahmad

Theses

A three layer methodology is presented for designing spacecraft onboard computer systems. The system design is perceived as a sequence of three hierarchical layers: the Dedicated Processing Layer, the Application and Support Processing Layer, and the Communications Processing Layer. Each layer implements a distinct set of functions and offers services at different levels of abstraction. As opposed to the ISO/OSI Reference Model, where the prime objective is to implement peripheral interaction between two systems, the layered approach used here is to address the problems in system design itself. The problem is approached in a bottom-up fashion, starting with the description …

A Microcomputer Based Non-Invasive Cardiopulmonary Monitor Using A Microwave Interferometer, Tanmoy K. Basu

Theses

With a microwave interferometer the vibrational velocity of the anterior (front), as well as posterior (back) chest wall can be monitored and recorded. The recorded signals are a reflection of the mechanical cardiac activity within the chest cavity, as opposed to Electrocardiogram (ECG) which is a reflection of the electrical cardiac activity. The interferometer recordings are obtained with no physical contact between the instrument and the subject. Moreover, the subject can be fully clothed since microwave energy readily passes through normal dry clothing.

A microwave interferometer that is capable of detecting the vibrational velocity of the surfaces of the chest …

X.25 Interface Packet Level Simulation, Arvind Tewari

Theses

An X.25 interface was simulated at the packet level and data packets successfully transmitted from the Data Circuit-Terminating Equipment (a process) to the Data Terminal Equipment (another process). This was executed interactively. Two independent processesg were generated on the AT&T 3B15 computer and inter-process communication (IPC) used to transfer the data. The X.25 interface is based on the Open System Interconnection (OSI) model of the International Standards Organization.

Design Of A Lan Based Data Acquisition System For Sensor Applications, Krishna Murthy Uppunda

Theses

This thesis presents the design of a local area network (LAN) based data acquisition system for sensor applications. The circuit designed forms the robotic LAN (RLAN) interface between the sensor IC nodes and the ARCNET network. The RLAN network uses two packet protocols. The sensor data request (SDR) packet is received by the sensor IC nodes and the sensor transmits the sensor data (SD) packet. The RLAN interface provides a two way communication between the sensors and the ARCNET network. Whenever an ARCNET node receives the SDR packet, it stores the packet temporarily in a 1k RAM buffer. The RLAN …

Use Of The Lms Algorithm In Ecg Analysis, Xiaohua Yang

Theses

The purpose of this thesis is to develop an IBM PC-AT based system to effectively process electrocardiogram (ECG) signals. Adaptive filter theory is used to implement a noise cancellation system (adaptive noise canceller), which adaptively cancels the ECG signals resulting in real ECG noise. The adaptive process is based on the well known least-mean square (LMS) algorithm.

The noise canceling system is software based. Several programs have been written, which include analog to digital converter control, data acquisition and storage, data retrieval, adaptive filtering and digitized data graphics.

The thesis presents numerous computer experiments. The performance of the adaptive noise …

A Research Analysis : Differences Between Contemporary Corporate Management And Entrepreneurial Management, Kevin A. Gugliotta

Theses

A research analysis was conducted to distinguish the differences between contemporary corporate management and entrepreneurial management. A major difference is in the attitude, perception, and priority of the senior management and the organizational mission. Other distinguishing differences are related to individual and organizational leadership, organizational hierarchy and structure, decision-making authority, and compensation systems for employees.