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Prefeasibility Study Of Flexible Manufacturing System, Patrice Gerault

Theses

Most major companies over the world are or intend to go into Flexible Manufacturing System. But, FMS is not as easy to implement as most cf the other equipments. It affects the whole company and careful studies must be done before parchasing it.

After a description of this new system, this paper reviews the effects introduced by FMS and the alements of savings or surcosts in comparison to conventional systems ; but no numerical evaluations are stated.

This paper gives a frame to any company which wants to undertake a prefeasibility study.

Reliability Screening Of Transformers, Bharat M. Shah

Theses

The purpose of this project is to study screening of components from the reliability point of view. The component used is electronic transformer. The screen chosen is Electrical Noise generated in the transformer insulation system and the failure mode selected is leakage current in the transformer insulation.

Experiments were conducted to monitor electrical noise generated due to partial ionization of the tiny air gaps in the transformer insulation. The voltage stress, regiured to be applied to the insulation system, for constant 59 units of noise, recorded for the sample of three hundred seventeen transformers.

The voltage readings were analyzed statiscally …

Amatitlan, An Actively Resurging Cauldron 10 Km South Of Guatemala City, Richard L. Wunderman, William I. Rose

Department of Geological and Mining Engineering and Sciences Publications

A 14×16 km diameter collapse caldera has been recognized 10 km south of Guatemala City, Guatemala. The caldera is north of the presently active volcano Pacaya and west of Agua, a large stratovolcano. The caldera was not previously recognized because its eastern and western margins coincide with faults that outline the Guatemala City graben and because the northern margin of the caldera is buried by pyroclastic rocks. The existence of the northern caldera margin is now established by gravity data and a variety of geological observations including circumferential faults, hot springs, well-log data, and lithological changes in sedimentary rocks. A …

Acuta Enews September 1984, Vol. 13, No. 9

ACUTA Newsletters

In This Issue

PRESIDENT'S MESSAGE

BOSTON CONFERENCE

MULTIPLE POSSIBILITIES FOR MULTI-POINT NETWORKS

Planning For The On-Orbit Servicing Of Military Spacecraft, Michael E. Russell, Robert M. Tayloe

Theses and Dissertations

On-orbit spacecraft servicing for military programs is examined. The military community appears to be somewhat reticent to embrace or, in some cases, to even consider on-orbit servicing. The civilian community appears enthusiastic about the potential of on-orbit servicing and the majority of economic studies of civilian missions show servicing strategies to be an attractive alternative to most expendable spacecraft strategies. A model called SATSERV is presented. This model can be used to conduct economic comparisons from an overall standpoint between expendable and servicing strategies. The model is implemented in a microcomputer spreadsheet format for rapid implementation and application along with …

Acuta Enews August 1984, Vol. 13, No. 8

ACUTA Newsletters

In This Issue

President's Message

Bits & Pieces

Telecom Study Program to Begin

Information Management says Telecom Manager Fulfill Critical Role

MASTER OF SCIENCE DEGREE IN TELECOMMUNICATIONS

AT&T: WHAT WAS IT WE WERE TRYING TO FIX

MIDWESTERN TELECOMMUNICATIONS CONFERENCE '84

Acuta Enews July 1984, Vol. 13, No. 7

ACUTA Newsletters

In This Issue

President's Message

Party Line

Time-Compression Multiplexing Squeezing Digits Through Loops

Bits & Pieces

Repair Records lmportant

Wanted, Telecomm Pros

Power Characteristics Of Single‐Mode Semiconductor Lasers, Jaroslava Z. Wilcox, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

The basic aspects of power calculations for high‐gain semiconductor lasers are briefly reviewed, and a straightforward one‐dimensional model is described. The relative importance of spontaneous emission, distributed losses, band‐to‐band absorption, and high single‐pass gain are investigated in detail.

Block Encoding Of Speech Spectral Principal Components, James R. Holland Jr.

Electrical & Computer Engineering Theses & Dissertations

A Karhunen-Loeve series expansion was used to block encode speech spectral principal components as a function of time. Each of ten principal components was first obtained as a linear combination of 2© speech spectral band energies. Using a fixed block length of 10 frames (0.128 s), the K-L basis vectors were computed separately for various speakers for each principal component. In all cases the resulting basis vectors were essentially a set of discrete cosine basis vectors. Synthesis of speech from the block encoded parameters showed that very little information is lost with up to 70% data reduction. The block encoding …

Suboptimal Algorithms For Improvement Of Pipeline Through Insertion Of Delays, Sukhamoy Som

Electrical & Computer Engineering Theses & Dissertations

Pipelining is now widely used in the design of high speed processors in order to overcome the intrinsic speed limitations imposed by the technology. For a good performance and avoidance of internal conflicts, the concurrent operations within different subunits of a pipeline architecture should be properly scheduled This scheduling problem is known to be intrinsically difficult" and a member of the "NP complete class of problems. The aim of this thesis is to develop heuristic suboptimal algorithms whose execution time is a polynomial function of the number of items to be scheduled. Insertion of delay is used as a basic …

Acuta Enews June 1984, Vol. 13, No. 6

ACUTA Newsletters

In This Issue

President's Message

Party Line

Bell Labs Won't Have To Share ldeas As Much

Why AT&T Will Lose More Long-Distance Business

United Telecom Makes Long Distance Phone Plan

AT&T Long Distance Plan Stirs Varied Reactions

The lrony Of lt All

Santa Clara Magazine, Volume 26 Number 8, Summer 1984, Santa Clara University

Santa Clara Magazine

2 - ALBEE'S ST. GEORGE AND THE DRAGON By Michael Tueth, S.J. Some principles of archetypal criticism are applied to Albee's Who's Afraid of Virginia Woolf?

7 - NUCLEAR ADDICTION Edmund G. Brown Jr. The United States and the Soviet Union are engaged in an addictive and ultimately lethal process. Neither will break out of the curse of assured mutual destruction.

9 - GIVE US THIS DAY OUR DAILY BREAD By Charles E. French. There are good reasons today to hope for a solution to world hunger, one that will occur in our time.

13 - TRAITS OF A HEALTHY …

Analysis Of Accidents Involving Crash Cushions, Jerry G. Pigman, Kenneth R. Agent, Tom Creasey

Kentucky Transportation Center Research Report

This report is an analysis of 127 accidents involving crash cushions in Kentucky. The primary data base was for the period 1980-82, with some additional data before and after this period. An attempt was made to document each accident with a police report, photographs, and a repair form. The largest number of accidents (63) involved a Hi-Dro cell cushion or cluster, followed by 33 accidents involving a G.R.E.A.T. crash cushion, 19 with a temporary G.R.E.A.T., 10 with sand barrels, and 2 with steel drums.

Average repair cost was lowest for the Hi-Dro cell cushion ($392) and highest for the Hi-Dro …

Survey Of Effectiveness Of Transportation Services (1984), Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objective of this study was to measure the effectiveness of transportation services by means of a public opinion survey. Results from the mail survey were intended to provide administrators with quantitative measures so that emphasis would be based on the public's perception of specific programs. Questionnaires were mailed to a random sample of 800 licensed drivers in each of Kentucky's 12 highway districts for a total of 9,600 statewide. The total response rate was 51 percent for all districts, with 49 percent considered to be usable responses.

Results from the survey showed that 82 percent of the respondents were …

Microcomputer Controlled Instrumentation System For Studies Of Metabolic Changes In Rats, Murat Dertlioglu

Theses

The system measures the respiratory exchange in rats in a controlled experiment. An interface unit provides data, received from several measurement instruments such as gas analyzers, an electronic flowmeters, electronic thermometer and an electronic hygrometer, to the computer. The data is gathered from different chambers in a multiplexed mode.

The computer samples the chambers sequentially and prints out the results and stores them on the disk. The sampling duration of each chamber and the number of the rats to be tested can be programmed. The system can perform experiments with twelve animals, in the following arrangments, either one group of …

Computer Based Instrumentation System For Measurement Of Cardiac Output In Small Animals, Prasad L. Gavaskar

Theses

The task of the instrumentation system is to measure cardiac output in animals like rats, dogs, etc. A thermal-dilution method is used for this purpose. The temperature change due to injection of saline is picked up by thermo-couple microprobes implanted in the blood-vessel. The signal after conditioning is fed to a data acquisition system controlled by a computer.

With the help of a computer it is thus possible to monitor and control an experiment on several animals. The computer can sample the chambers sequentially. The sampling cycle duration and frequency are programmable. The data is collected and processed to determine …

Automated Instrumentation System To Monitor Behavioral Experiments, Dilip S. Gokhale

Theses

An instrumentation system has been designed to monitor behavioral experiments on monkeys. This instrumentation system is capable of performing these experiments in an automated manner without any human intervention. It is capable of monitoring these experiments concurrently in six boxes. It exhibits several features that make it more versatile than previous instrumentation systems. It is also capable of storing the data generated on to a floppy disk and later transmitting it to the mainframe.

Another feature that makes it more versatile is the flexibility of the system. Presently it is configured to run experiments with variable interval schedules. However with …

Tourist Development And Environmental Impact Of Future Airport Construction In Athens, Greece, Vasilios Michael Halkias

Theses

The present thesis is an overall study of the suitablility of the eastern region of the Attica Peninsula in Greece, for a Tourist Development. The future construction of the new International Airport of Athens within the region is a significant factor that has been taken into account for the study.

It also examines and projects the Environmental Impacts due to the Airport construction.

The description of the studied area is presented by maps and refers to the Environmental Inventory. This Inventory examines the Water Resources of the region, Topography, Land Uses, Transportation System, Air and Noise Quality, Archaeological Sites, Utilities, …

The Effects Of Feedback On Operator Performance In A Production Environment, Diane L. Knoll

Theses

The objective of this thesis and it's associated research is to analyze the positive effects of feedback in a production environment. The experimental data was collected at the Ortho Pharmaceutical Corporation in New Jersey and a subsidiary company, The J. T. Clark Company, in Illinois.

The experiments involved three types of feedback indirect feedback provided to a large group of packaging operators, direct feedback provided to a small group of temporary packaging operators in a training situation, and direct feedback provided to an entire workforce of operators performing dissimilar, but interrelated tasks.

The results of these experiments were consistent with …

An Investigation Of Characteristics Of Blood Velocity In A Simulated Circulation System, Yung-Gang Wu

Theses

The major objective of this thesis is to find the relationship between the blood velocity and the stenosis of the vessel. Tests were performed with different degrees of stenosis at varied logitudinal positions from the testing probe in the vessel of a Z-80 microprocessor controlled artificial circulation system.

Three methods were used to detect the velocity in the vessel: continuous wave Doppler, Pulse Doppler, and a hot-film device. The first method can get the average velocity, while the latter two have the capability to find a velocity profile, and all are important indicators to the arterial occlusion phenomenon.

An analysis …

Risk Assessment For New Products In Office Automation, Dolores Ann Canale

Theses

As investors survey the industrial growth of technology for the late 1980's one area leading the range for large potential growth is the area of office automation. Though this area has been under heavy speculation by many large firms (such as IBM, AT&T and EXXON) for the pass ten years it still remains an unexplored market for many investors. The objective of this research paper is to study the risks companies. will face developing products for this horizon.

Investors believe that success in this area, as well as, many other areas of engineering rely in large measure on the willingness …

Performance Modeling And Simulation Of Multiple Microcomputer Systems, Moorthy Narayana Hariharan

Theses

Multiple processor systems are the logical choice for applications demanding high computing power, throughput and reliability. Moderately coupled Multiple Microprocessor systems can be applied to a variety of applications demanding high performance. The structure of Multiple Microprocessor systems is examined. Various interconnection structures are analysed for performance comparisons.

Queueing theory is a powerful tool in modeling and analysing Computer systems. Queueing models are developed for popular Multiple processor interconnection topolog es like the Shared memory, Shared bus, Star and Loop configurations.

The usefulness of Digital computer Simulation techniques in estimating the performance of Multiple processor systems is demonstrated through a …

Decision Rules Applied To Spread Spectrum Signal Detection, Richard Jae Kim

Theses

Decision rules for detection of spread spectrum signals were investigated. For each decision rule, error and erasure probabilities were analyzed. The obtained data was used to plot PE vs Pe for constant signal-to-noise ratio (SNR). With the use of the probability of a word error curves the optimum threshold setting was found for a given SNR.

FSK (orthogonal signalling) and PSK (antipodal signalling) were considered for modulating the chips. When the PE vs Pe plots for FSK and PSK were compared, PSK performed better than FSK by a ratio of 6 dB.

Finally, analog and digital correlation of the received …

A Systematic Program For The Management Of A Sanitation Function In The Food Industry, John Joseph Sprainitis

Theses

The sanitation of food processing and packaging facilities is a labor intensive activity. As with any labor intensive operation, effective planning and control of the manpower is necessary. The more effective tie management, the more effective and productive the manpower will be.

As the effectiveness of the management improves, the cost effectiveness of the manpower will improve.

In dealing with the manufacturing of foods, there are numerous government regulations, of which sanitation plays a key role. Misunderstanding the impact of these regulations, and either over- or under-reacting to them, can result in unnecessary costs or severe problems.

In order to …

A Study Of Worker Motivation, Farid Uddin Ahmad

Theses

This thesis mainly deals with the motivation of the production managers, engineers, technicians and production workers. The purpose is to emphasize the need for providing due motivations to an important work group of the industry who are largely ignored. An attempt has been made to amply demonstrate the various techniques for worker motivation. As the study of standard motivational theories alone cannot solve the complex motivational problems, all possible efforts have been made to relate, integrate and blend the theories with actual applications in the organizations. All the relevant and important issues connected with worker motivation have been highlighted. Points …

Successful Management Techniques For Introduction Of Computerized Systems In A Production Facility, Michael James Boyle

Theses

This thesis surveys the potential for introducing significant organizational change into a manufacturing environment which is undergoing large scale capital improvement.

The first portion describes both the organizational and technological barriers present at a specific manufacturing facility. The capabilities of a computer based process control system are detailed along with its ability to fulfill the employer's particular business needs.

The next portion details the work necessary to train both management and production operators, not only on how to use this computer based equipment, but also how they themselves must change their personal modes of thinking in order to carry out …

Investigations Into Rates And Mechanisms Of Mercury Depuration In The Killifish, Fundulus Heteroclitus, Joanne A. Korpanty

Theses

Metallothionein (MT) and glutathione (GSH) have been shown in mammalian research to play a role in the sequestration and depuration of mercury. The sulfhydryl groups on both these peptides have a strong affinity for mercury, MT for Hg²⁺ and GSH for CH₃Hg⁺. In this study, killifish (Fundulus heteroclitus) were force-fed one piece of squid laced with labelled mercuric nitrate to give a final food concentration of 20 ppm ²⁰³Hg²⁺ and 0.03 -0.05 µg g-1 Hg²⁺ total dose. Most of the mercury, 84.1 ± 12.1% (mean ± standard deviation), is depurated within the …

The Role Of Case Studies In The Evaluation Of Soil Liquefaction Potential, H. Bolton Seed

International Conference on Case Histories in Geotechnical Engineering

Field evidence concerning soil liquefaction is reviewed and a number of case studies are summarized. Examples of the use of case studies in developing an understanding of the liquefaction phenomenon, both on level ground due to earthquake shaking and in slopes due to earthquake and static stress applications are presented.

Squeezing Problems In Indian Tunnels, J. L. Jethwa, A. K. Dube, B. Singh, Bhawani Singh

International Conference on Case Histories in Geotechnical Engineering

Case histories of three Indian tunnels indicate that squeezing conditions are created due to plastic flow of rock masses under the influence of high cover pressures. These examples emphasize that a tunnel experiencing squeezing conditions must be allowed to deform to optimize support costs and avoid delays. Allowance for desirable tunnel deformations must, therefore, be made while planning the size of excavation.

Field data has shown that a flexible support system of compressible backfill and steel ribs may be used as an alternative to shotcrete support which is unpractical in Indian tunnels excavated largely by conventional methods. Instrumentation indicates that …

A Case Of Land Use And Urban Planning In The Expansive-Soil District, Hou Shitao, Wang Siyi, Zhou Jibing, Cao Kezhi

International Conference on Case Histories in Geotechnical Engineering

Taking the construction and reform planning for new town of Yunxian County as an example, this paper deals with the principles of land development and use and town construction and reform planning in the expansive-soil area in the case of undulating mountain topography, including the problems of treating expansive-soil slope, of treating expansive-soil foundation etc., not involving other aspects of general planning.