Engineering Commons^™

A Global Resource Allocation Model For An Electrical Utility, Pantelis G. Tinios

Theses

The management of the electric utility company, as the management of any other company, has to make important decisions which will have a direct impact on the company's future operations.

In this study, a global model was devised which enables the management to make more intelligent decisions related to the company's planning process.

The company's goals and subgoals are formulated, in a systematic way, into the mathematical model along with operational and financial constraints. Productivity growth, steady labor force, fuel availability, cash flow requirements, share rating, and coverage were some of the goals to be achieved. The goal programming technique …

On Circular Hvac Duct Design Through Stress Analysis, Chien-Chung Lee

Theses

In this thesis, comprehensive studies through stress analysis of the circular HVAC ducts are made. The ducts are made of thin gaged steel sheet, and reinforced by stiffeners that are made of hot-rolled steel sections of L or C shapes. The ducts are loaded with pressure, its own weight and the possible seismic accelerations. A comprehensive FORTRAN program is developed as an aid Lo achieving the optimum design of circular ducts, i.e. duct thickness, stiffener spacing, stiffener size and seismic span length, Several stress analysis tables and a design parameter plot arc, provided in this thesis Lo facilitate design optimization.

A Comparison Of Training Available To Entry Level Naval And Merchant Marine Engineroom Personnel, Paul J. Bugelski

Theses

Similarities between occupations or industrial environments are often overshadowed by differences between goals, services, or products. From the time that shipboard steam propulsion became a practicality the Naval and merchant marine services have experienced this phenomena. For various reasons, the two sectors have ignored similarities between their respective occupational sub-groups, e.g. engineroom crews, and the training which facilitates each group's performance.

Manning and training problems, related to the evolution of automated shipboard propulsion plants, have been shared by the U.S. Navy and commercial ship operators. Recent events such as the British Falkland Islands crisis and the implementation of the U.S. …

A Diagnostic Study Of Burning Black Powder Via Stroboscopic Laser Schlieren Photography, Donald Bruce Rowland

Theses

The combustion processes and products of a single grain of burning black powder were experimentally investigated via the stroboscopic laser schlieren photographic technique. A high power modulated argon laser system was used in conjunction with a streak camera to provide a dynamic sequence of time resolved, high resolution schlieren photographs of a burning black powder grain. When black powder burns, a multi-phase product is produced consisting of hot gases, solid particles, and a molten liquid spray. The expansion processes of this multi-phase product cloud were recorded and characterized. Molten drops, reactive and nonreactive particles within as well as outside of …

Keeping Up With Technological Change, Karlis V. Kopans

Theses

Advances in technology over the past fifty (50) years have changed virtually everything that touches our lives today to some degree. However, in the last five years or so, these innovations have been combined into products and systems which have visibly begun to change society as we have known it in the past.

Only in recent years, have the affects of technological change or innovation on society begun to be examined. While a fair amount of literature has been published to date on specific areas of technological change, few publications have been produced which provide a general overview of the …

A Maintenance Program Guide For The Non-Technical Building Manager, Luis M. Tavares

Theses

For the most part, the title of Building Manager is conferred upon an individual who is given the responsibility of services support for a facility. However, this title many times is carried by men/women who are responsible not only for the upkeep of the general building, janitorial, and food services but also for the safekeeping of the building equipment, such as mechanical and electrical machinery. At times, these individuals may be involved with general service responsibilities and tend to lose sight of maintenance needs.

In order for the Building Manager to implement maintenance successfully, he/she must understand the close cooperative …

Conversion And Kinetics In The Reaction Of Chloroform With Water Vapor At High Temperatures, Chii-Guang Hwang

Theses

This is an experimental study on thermolytic reactions of chloroform with excess water vapor where kinetic parameters are determined and complete product analysis made at atmospheric pressure over a temperature range from 550to 1050°C. In this study, water vapor was introduced as a reactant to convert chlorine in chlorocarbons to stable HCl which is an easily neutralized end-product and thereby completely destroy chloroform. Substantial amounts of thermodynamically stable species: HCl, CO, CO₂, C(s) etc. were observed as products.

The reaction was studied in a 46cm tubular flow reactor mounted in a furnace that had three independently temperature-controlled heating …

Reactions Of Hydrogen With Chloroform And Trichloroethylene At High Temperatures, Burhan Mahmood

Theses

The reactions of chloroform and trichloroethylene with hydrogen in the temperature range 550 to 1000°C were studied using tubular flow reactors of varying diameters. The residence time range was from 0.05 to 3.0 seconds.Two different concentrations of the chlorinated species were used, each with hydrogen in large excess. Flat temperature profiles (+/- 5°C) were achieved over 80 to 85 per cent of the 45 cm long reaction zone, with inlet gases preheated to about 400°C.

No chlorinated hydrocarbons, products or reactants were observed at /above 850°C. The major products at these temperatures were C₂H₂, C_{2 …}

A Comparison Of The Biodegradation Of Phenol And O-Chlorophenol Using A Municipal Mixed Liquor And Three Commercial Microbial Preparations, Nigel P. Mcmullen

Theses

The biodegradation of phenol and O-chlorophenol was studied in six-liter batch reactors, using a municipal mixed liquor (from the Livingston, NJ treatment plant) that had not previously been exposed to either of the substrates. In addition, three commercial microbial preparations: BI-CHEM (Sybron), Hydrobac (Polybac), and LLMO (General Environmental Science), were tested alone and in combination with the municipal mixed liquor.

It was found that the municipal mixed liquor performed significantly better than any of the commercial preparations by themselves. When the commercial preparations were mixed with the municipal mixed liquor in a ratio of 1:10 it was found that the …

Failure Rates And Leakage Current Increase In Tantalum Capacitors Of Different Manufacturers, Joseph G. Grant

Theses

This study has determined the effect of high humidity and temperature on solid tantalum capacitors, from five different sources.

The reasons for using capacitors from five different prestigious sources is to first determine how the parameters change with the different manufacturing techniques used by the different sources. Secondly to rank the different sources according to reliability. The parameters that were measured before and after the "1000 hour" high temperature and humidity test were, capacitance, leakage current, and equivalent series resistance. All the capacitors showed significant increase in leakage current after the test, but there were wide variations in catastrophic failure …

A Cogeneration Industrial Park In An Urban Environment In The Year 2000, Raymond T. Scott

Theses

An investigation into the feasibilty of placing an industrial park in an urban environment in the year 2000 was made. A selected cogeneration facility located within the park would supply electricity and process steam to the industries with minimal transmission costs and environmental effects. A projection was made on the industries that would exhibit growth to the end of this century, and yet be environmentally benign in nature. These industries would be placed within the industrial park. The selection of the cogeneration facility was based upon projections of fuel availability, environmental factors and available technologies. Socio-economic factors and the effects …

Comparative Study Of Computational Methods For Kinematics Of Mechanism Analysis, Ren-Jea Wang

Theses

This thesis introduces three numerical methods of solving nonlinear algebraic equations, i.e. Newton's method, Brown's method, and Brent's method, and applies these methods to kinematics of mechanism problems for comparative study.

Firstly, each method is reviewed in some detail. Then experimental computer programs, NABKAP(Nonlinear Algebraic equations Based Kinematic Analysis Programs), are developed based on the above methods and used to solve kinematic of mechanism problems. Example problems include various kinds of four-bar mechanisms and two degree of freedom mechanism. Lastly, each technique is compared with the others based on the above computational experiences.

The FORTRAN programs used for this study …

Simulation Of The Manufacturing System : A General Discussion, Di-Cheing Chien

Theses

This thesis treats the problem of multi-variable sensitivity analysis in a production system which may be used in investigating a variety of characteristics of a flow production system which involve idle time, cost, production rate, ect. are the subjects of the analysis.

The analysis procedure follows the rule of INPUT/OUTPUT through a production process. A simple system model using elements such as : raw material, transfer tool, labor, machine and energy/ or electrical power, is used to lead into the construction of dependent-variable system. A utilization is made of industrial robots as well as humans in loading and unloading machines …

Development Of A Gating System For The "H" Process Of Metal Casting, Dean A. Boyce

Graduate Research Papers

The "H" Process of metal casting uses a unique gating system that controls the flow of molten metal during the casting process. A feeder/runner bar serving each casting is the vital element in the "H" Process. Available information on the "H" Process is not very specific about the runner system configuration. This study will develop a gating system for use with the "H" Process using the available information and principles of conventional gating practice.

Mode Of Communication And The "Risky Shift" : A Controlled Experiment With Computerized Conferencing And Anonymity In A Large Corporation, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz, Murray Turoff, Kenneth Johnson

Computerized Conferencing and Communications Center Reports

Peer groups of five managers in a large company with a well developed corporate culture engaged in choice dilemma tasks using three modes of communication: face-to-face, synchronous computerized conferences with regular names, and synchronous computerized conferences with assigned pen names. This is the final technical report on the experiment, including documentation of all procedures, and reports of the tests of all hypotheses, including those which were not supported.

Choice behavior varied by problem and mode of communication. On a problem related to a major decision on the future of the company, conservative choices and conservative shifts dominated. On two choice …

Laser Levelling Land For Flood Irrigation, M D. Green, J. P. Middlemas

Journal of the Department of Agriculture, Western Australia, Series 4

Since the introduction of laser levelling to Western Australia's South-West irrigation area five years ago, many farmers have benefited from this new and precise method of land-forming.

The use of lasser controlled earthmoving equipment to redevelop irrigated paddocks has led to improved irrigation efficiency and drainage. Less water is used for each irrigation, water is applied more evenly and less labour is needed. many older, grass-dominated paddocks have been reseeded to improve pasture species.

Salinity Control In Northern China, G A. Robertson

Journal of the Department of Agriculture, Western Australia, Series 4

China has vast areas of saline land, perhaps as much as six million hectares. Some of this saline land is a result of marine influence in coastal areas and some is the resultof soil formation in areas with saline geological deposits and inadequate rainfall to leach out the salts at that time.

However, most saline soils in China are as a result of secondary salinisation processess induced by a hydrological imbalance resulting from over-clearing of the land or irrigation. This imbalance has produced rising watertables bringing the salt closer to the soil surface.

In this article, G..A. Robertson, Commissioner …

Acuta Enews January 1985, Vol. 14, No. 1

ACUTA Newsletters

In This Issue

Yale University

Party Line

The Intelligent Campus

Centrex/ Essx Service

Potpourri

Summer 1985, 90.9 Wmpg Fm

WMPG Program Guides

Light pink, folded into thirds.

Biofilm Growths With Sucrose As Substrate, Ju-Chang Huang, Shoou Yuh Chang, Yow Chyun Liu, Zhanpeng Jiang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study was conducted to: (1) Evaluate the effect of DO on cell yield in a fixed film reactor using 1,000 mg/L sucrose as a substrate; (2) evaluate the correlations of the biofilm thickness and density with DO and their resultant substrate stabilization rates; and (3) examine the response of biofilm communities as a result of DO and biofilm thickness changes. Data obtained from this study indicate that DO has only a minor effect on the cell yield. However, the thickness of aerobic biofilm is definitely related to DO, or thickness (mm) = (2.08 x DO)/(9.2 + DO). The biofilm …

Evaluation Of Micro Irrigation Systems, Charles M. Burt, Robert E. Walker, Stuart W. Styles

BioResource and Agricultural Engineering

No abstract provided.

Applications Of Optical Emission Spectroscopy To Semiconductor Processing, Richard N. Savage, John G. Shabushnig, Paul R. Demko

Materials Engineering

Optical emission spectroscopy (OES) has proven to be a valuable tool in the developmrent and production of state-of-the-art semiconductor devices. Application to the plasma etching of a variety of materials necessary for integrated circuit fabrication is discussed, with particular emphasis placed on etch endpoint analysis. The utility of OES techniques in monitoring photolithographic processes is also presented.

Response Of Lithographic Mask Structures To Repetitively Pulsed X-Rays: Thermal Stress Analysis, A. Ballantyne, H.A. Hyman, Clive L. Dym, R.C. Southworth

All HMC Faculty Publications and Research

This paper examines the effects of thermal loading and time history upon the thermal stresses developed in lithographic mask structures as would be expected under irradiation by intense soft x rays. The objective of this work was to examine the phenomenology of the interaction and to evaluate the limits placed upon mask dosage. The mechanics of mask failure are examined in terms of single pulse and cumulative, or fatigue, effects. A number of prototypical mask structures are investigated, which show that the application of intense pulsed sources to x‐ray lithography does not reduce the potential utility of the techique. However, …

Response Of Lithographic Mask Structures To Repetitively Pulsed X-Rays: Dynamic Response, Clive L. Dym, A. Ballantyne

All HMC Faculty Publications and Research

This paper addresses the issue of the dynamic response of thin lithographic mask structures to thermally induced stress fields. In particular, the impact of repetitively pulsed x‐ray sources are examined: the short duration (1–100 nsec) pulses induce large step changes in mask temperatures, which can, in turn, induce a dynamic response. The impact of conductive cooling of the mask is to reduce the repetitively pulsed problem to a series of isolated nearly identical thermal impulses of duration approximately equal to the cooling time. The importance of self‐weight and prestress is examined, and an analysis of the nonlinear dynamic response to …

Santa Clara Magazine, Volume 27 Number 3, Winter 1985, Santa Clara University

Santa Clara Magazine

2 - WHEN ARE LEADERS AT THEIR BEST? By James M. Kouzes and Barry Z. Posner. There is a revolution in leadership style taking place in corporate America. This deals with how ordinary people get extraordinary things done in organizations.

7 - A MEDITATION IN ST. IVES By William J. Rewak, S.J. Some reflections on the essence of work taken from Father Rewak's travel diary during a trip to England last summer.

10 - TAKING LAUGHTER SERIOUSLY By John Morreall. A philosophy professor shows how important humor is to human life and how understanding our laughter can help us understand …

Study Of Mo, Au, And Ni Implanted Molybdenum Laser Mirrors By Spectroscopic Ellipsometry, Paul G. Snyder, George H. Bu-Abbud, Jae Oh, John A. Woollam, David Poker, D. E. Aspnes, David Ingram, Peter Pronko

Department of Electrical and Computer Engineering: Faculty Publications

The implantation of 150 kev molybdenum ions into polished molybdenum laser mirrors is found to increase the complex dielectric constant in the visible spectrum. Analysis using the Bruggeman effective medium approximation demonstrates that the increase is due to surface smoothing and that the surface is made nearly atomically smooth by a fluence of 5 x 10¹⁵ /cm². Implantation of Au at 1Mev caused considerable microscopic roughening, as well as a change in the bulk optical properties. 3 MeV Ni ion implantation caused only a slight surface roughening. A thin dielectric film (probably a hydrocarbon) is found to …

Us Army Missile Intelligence Agency, Redstone Arsenal, Alabama, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This is a recruitment brochure for the Missile Intelligence Agency (MIA) providing a thumb-nail history and description of the organization. The brochure was sent to Robert Bolin in 1985 by MIA.

MISSION • TO PROVIDE WORLDWIDE, SCIENTIFIC AND TECHNICAL INTELLIGENCE (S&T) TO MEET THE REQUIREMENTS GENERATED THROUGH THE DEFENSE INTELLIGENCE AGENCY AND THE OFFICE OF THE ARMY ASSISTANT CHIEF OF STAFF FOR INTELLIGENCE. • TO DEVELOP AND DISSEMINATE FOREIGN INTELLIGENCE CONCERNING GUIDED MISSILE SYSTEMS IN RESPONSE TO INTELLIGENCE PRODUCTION REQUIREMENTS. • TO ASSESS THE S&T THREAT TO THE UNITED STATES. • TO ENHANCE WEAPONS DEVELOPMENT.

Window Treatment For Energy Conservation, Florida Solar Energy Center, Ross Mccluney

FSEC Energy Research Center®

This Energy Note gives the non-technical reader a clear look at windows - how to get the most from them in cooling, heating, ventilating and illuminating the home. Although most of the points are applicable anywhere in the country, emphasis is on summer solar heat gain experienced in buildings in Florida. Two common features of Southern building style are large window areas to let the light and breezes in, and shading devices or window films to keep the hot sunshine out. This energy note addresses design guidelines and strategies as well as shading devices and window films for existing windows.

Computer Modeling And Design Of State Space Feedback Control System For A Process Veneer Dryer, Allen D. Nease

Retrospective Theses and Dissertations

This thesis describes the design of a state space feedback control system for a process veneer dryer. The input variable is dryer atmospheric temperature and the output variable is veneer moisture content. As usual in the design of control systems for real-world processes, the biggest task was modeling the system to obtain the system differential equation and state space representation. The system equation derived from the model was checked against the behavior of the real-world system using the Advanced Continuous Simulation Language (ACSL) software package run on a VAX 11/750 computer. From the system equation a state space control system …

Fiber Optic Fluid Level Sensor, Navid Ghandeharioun

Retrospective Theses and Dissertations

A fiber optic fluid level sensor based on light transmission attenuation due to bending losses is designed, built and tested.

Fibers formed with reverse curvatures of decreasing radii will induce and increasing amount of lower order mode light loss to the cladding as the light propagates along the step index multimode fiber. The sensor is arranged in the fluid in a vertical position such that the light travels along the fiber from the bottom or low fluid point to the top or full point. As the fluid covers increasing lengths of the exposed fiber, it strips even more power from …