Digital Commons Network^™

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 …

Development Of Dynamic Testing Machine For Laboratory Modeling Of The Rock Fracturing Phenomenon, Mohammad Ali Moghaddass Zadeh Kermani

Theses

The purpose of this thesis is to develop a dynamic testing machine for laboratory modeling of the rock fracturing phenomenon. Bearing stratum fracturing is a construction difficulty which occurs when end-bearing piles are driven to weak rock or weathered sound rock. It is a pile group effect and can result in significantly less pile carrying capacity than the final driving resistance would normally indicate.

A linear scaling factor was derived to establish similitude between the laboratory apparatus and field conditions. This scaling factor is approximate and was used for overall sizing of the apparatus and its components. A more exact …

Mathematical Simulation Of Proteins Separation In A Packed Bed, Jing James Huang

Dissertations

The generalized adsorption models are developed to simulate the unsteady state mass transfer behavior in a packed column. Based on the nature of adsorbent particles, the adsorption models may be classified into two categories: (1) the surface adsorption model, (2) the pore diffusion model. In the first model, it is assumed that the internal diffusion is negligible, and the adsorption rate is determined by external diffusion and surface adsorption. In the second model, the effect of internal diffusion is considered as significant as that of external diffusion. For both models, the effect of axial dispersion in fluid phase is emphasized. …

Mathematical Modeling Of Carrier Mediated Mass Transfer Through Liquid Membrane Systems, Keng Chao Wang

Dissertations

Dispersed liquid membrane systems are double emulsion drops. Two immiscible phases are separated by a third phase which is immiscible with the other two phases. The liquid membrane systems were classified into three types: (1) carrier mediated mass transfer, (2) mass transfer with reaction in the receiving phase, (3) mass transfer without any reaction involved. Copper extraction, phenol removal and solvent extraction were used as typical examples for each type of the membrane systems in the derivation of their mathematical models. Models with or without the consideration of film resistances were developed and compared. The models developed in this study …

Stress In The Alveolar Bone Surrounding A Dental Implant, Jagmohan Singh Kohli

Theses

The purpose of this study is to find the stresses developed in mandibular bone due to the occlusal loading of oral endosseous blade implants. Previous work done in this area was based on the theory of "Beam on Elastic Foundation". As the width/length ratio employed is approximately 0.65, the theory of "Plate on Elastic Foundation" used in this thesis is more appropriate. The mandibular bone acts as the foundation supporting the endosseous implants.

The analysis is complicated by the fact that the implants are irregular plates of varying thickness, the foundation modulus is a variable and the occlusal loading is …

The Biodegradation Of Phenol And O-Chlorophenol Using Activated Sludge Bacteria, Jeffery Colish

Theses

The biological degradation of phenol up to 500 ppm and 0-chlorophenol up to 40 ppm was studied in an aerated 4.0 liter hatch reactor using activated sludge bacteria from the Livingston, N.J. wastewater treatment plant. From the concentration versus time data, kinetic rate constants were determined for phenol (@ 100 ppm) and o-chlorophenol (@ 20 ppm and 40 ppm). Air stripping was determined to be an insignificant removal mechanism for the compounds studied.

It was noted that the acclimation times decreased with repeated exposure to a particular concentration of phenol or o-chlorophenol, and that the activated sludge bacteria first had …

Development Of A Computer Model To Track Water Droplet Trajectories As Related To Aircraft Icing, Satyen G. Harve

Theses

In order to be able to predict the local ice accretion rate, or the icing profile on any surface it is neccessary that a model be available, which helps in determining the local impingement values of water droplets on the object. Two models have been developed. One model determines the potential and the velocity field around any arbitrary object. The second model determines the trajectory of the water droplets in the presence of a potential field. The two models have been combined to form a general trajectory model capable of tracking water droplet trajectories around any arbitrary object. The object …

Enhancement Of The Integrated Mechanisms Program (Imp) By Addition Of Graphic Output, Anil Parsaram Hingorani

Theses

The Integrated Mechanisms Program (IMP) is enhanced to include the capability of graphic output of simple mechanisms. The subroutines available in the graphics package GP-10 are used. The output consists of a drawing of the mechanism at its initial position and for every position for which the analysis is done. In addition, a graph of velocity and/or acceleration against the angle of the driving link may be plotted. There are limitations. The output of the mechanism represents only prismatic joints by a different symbol. It is represented by a rectangle and the symbol of the fixed link. All the other …

Japanese Management Techniques And Its Transition To Taiwan, Shih-Tung Shu

Theses

Japan's success, as measured by a vertically increasing balance-of-payments surplus, has created serious issues between Japan and other industrial democracies. It has created fears about the economic superpower status of Japan. On the other hand, because of this very success in coping with worldwide economic problems and in sustaining its export drive, Japan's unique style of managenemt has attracted a great deal of attention. As the Japanese have begun to demonstrate on ability to transfer their management style to the U. S. and other western countries, Japanese management and its transferability continue to be a subject of special interest in …

Correlation Of Dissolved Oxygen With Flowrate And Water Temperature In The Passaic River Basin, Shan-Pei Fanchiang

Theses

Passaic River water is utilized by a number of major water purveyors in New Jersey. They are the North Jersey Water Supply District Commission, the city of Jersey City, the city of Newark, the Commonwealth Water Company, and the Passaic Valley Water Commission (i.e. PVWC).

Since all are interrelated in that the demands and releases of each affect the other, there is an interest in insuring sufficient water to maintain adequate water quality for the last user on the line (i.e. PVWC) who draws water close to Little Falls.

Having daily data of flowrate, water temperature and dissolved oxygen in …

A Comparison Of The Biodegradation Of Nitrobenzene, 1-Butanol, And 2,4-Dichlorphenoxyacetic Acid Using A Municipal Mixed Liquor And Three Commercial Bacterial Preparations, Salvatore P. Salerno

Theses

The biological degradation of nitrobenzene, 1-butanol, and 2,4-dichlorophenoxyacetic acid (2,4-D) was studied in aerated 6 liter batch reactors using activated sludge from the Livingston, NJ wastewater treatment plant-- by itself and in a 10:1 by volume mixture with each of three commercial bacterial preparations: Hydrobac, BI-CHEM DC-1006/7, and Liquid Live Microorganisms (LLMO). Air stripping and adsorption were determined to be insignificant removal mechanisms for the three compounds studied. None of the bacterial mixtures were able to degrade 10 ppm nitrobenzene to any significant extent. A small but noticeable improvement in degradation rates occurred when the Livingston sludge was mixed with …

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.

Integrating Cad/Cam Into Engineering And Manufacturing Organizations : A Management Perspective, Gerardo A. Navia

Theses

The potential productivity improvements possible with CAD/CAM systems will require all Engineering and Manufacturing Enterprises to acquire this technology in order to stay competitive. Experience to date has shown that integration of these computer-based systems into the on-going operations is difficult and will not yield the anticipated benefits unless this is done properly.

This thesis examines the integration problem and how it is being dealt with by reviewing the literature and through personal contacts with both CAD/CAM vendors and users. It was concluded that for successful adoption and integration, Managers need a strong background in both the technical and managerial …

Contaminant Transport Against A Slowly Moving Fluid : An Experimental Investigation, Surya Man Shakya

Theses

Leachate migration into groundwater from leaking lagoons, hazardous waste sites, solid waste disposal sites, etc. has recently become a major cause of groundwater pollution. A possible solution to prevent leachate migration into groundwater is to create a negative hydraulic gradient toward the site. This can be achieved by installing two parallel slurry trench cut-offs around the perimeter of a leaking lagoon and by filling it with water. The water und-er the influence of positive hydraulic gradient will move toward the site and will finally find its way on the surface of the lagoon. Along with the flow of water, the …

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 …

Design Of A Photoreactor For The Oxidation Of Toxic Pollutants In Water By Ozone And Ultraviolet Radiation, Andrew Youngrak Park

Theses

A photoreactor has been set up to study the feasibility of ozone and ultraviolet radiation for treating pollutants in water. Phenol, 2,4-dichlorophenol, and 2,6-dichlorophenol were chosen as pollutants in this study.

The reaction kinetics mechanism has been postulated to be consisted of ozone decomposition, oxygen activation by UV, and reaction of pollutant with ozone, UV, and activated species. The corresponding reaction rate constants were found, using Rosenbrock optimization program, from four different experiment sets --- reaction of pollutant with ozone; reaction of pollutant with UV; reaction of pollutant with O₂/UV; reaction of pollutant with O₃/O_{2 …}

Human Factors In Quality Assurance, Min C. Tzou

Theses

This thesis is concerned with the impact of human factors elements upon the efficiency and quality of output in a manufacturing environment. The subject was aproached through the current literature as it appeared in periodicals and papers. There were very few texts on the subject of human factors discipline, specially in the application of behavioral principles, which this thesis was mostly base on.

The first chapter of this thesis discusses the increasing role people play in product quality, and the changing attitudes of today's work force. The next six chapters are broken down into three parts. Chapter II and III …

Industrial And Commercial Energy Management, Frank L. Peraino

Theses

This thesis deals with energy and its management in the industrial and commercial segments of our society. It provides an insight into the development and evolution of the energy manager, as well as a projection of his role in the next decade. Through an analysis of energy sources, the utilization of energy in the industrial and commercial markets, and the development of energy conservation attitudes and technologies, this thesis provides an appreciation of the factors that have molded yesterday's energy coordinator into today's energy manager. By projecting this analysis, a snapshot of the characteristics and duties of tomorrow's energy manager …

Experimental Investigation Of Submerged, Turbulent, Array Of Air Jets Impinging On A Flat Plate, Samir Sethi

Theses

Experimental investigation was carried out on the flow characteristics of a circular, submerged, turbulent, array of axisymmetric air jets impinging normally on a smooth, flat, square, lucite plate. Jets issuing from an array of circular nozzles 0.25 and 0.375 in. (0.635 and 0.9525 cm) in diameter were considered and nozzle exit Reynolds Number varied from 10,000 to 60,000.The ratio of nozzle center to center distance to the nozzle diameter, given by C_n/D, of 2 and 3 were considered. The jet velocity was not too high, such that at a Mach Number less than 0.3, the flow was still …

Performance Comparison Of Digital Communication Signaling Schemes, Hiroshi Okusawa

Theses

The intent of the work "Performance Comparison of Digital Communication Signaling Schemes" is to consider various signaling schemes for digital communication and their relative performances.

In order to gain a better perspective of the overall problem of digital communication signaling, the most basic ideas, such as conceptual techniques for the generation and detection of modulated signals, are outlined and provided.

The primary measure of performance -for a digital communication system is the error rate. Emphasis is placed on analyzing the probability of error for various idealized signaling schemes.

Computer Aided Design Of Optimum Structures, Sanjay M. Alexander

Theses

Techniques for the improvement of procedures for large scale structural synthesis are investigated. Considerable amount of research has been devoted to structural optimization. Yet as developments continue in this area, constant improvements in structural analysis methods, most of which are computationally demanding, tax the ability of existing optimization procedures to use the most powerful of the new analysis techniques effectively. This thesis presents optimization of structures modeled by classical discretized finite elements using the direct stiffness approach. The technioue presented here utilizes a Mathematical Programming (MP) method, which is based on Zoutendijk's feasible Direction Finding Problem (DFP). Modifications on Zoutendijk's …

Management Concept For Consumer Services Via Microprocessor Systems, Thomas William Bradshaw

Theses

With the proliferation of home computers and the subsequent ability to communicate with retail establishments, an opportunity exists for alternative delivery of goods and products to residential consumers. This paper explores the establishment, management, and problems associated with these burgeoning enterprizes.

Presently, there are several technologies and market strategies under devlopment which stress the convenience of making purchases. In addition to home computers there are other communication networks using different protocols such as videotext which consists of several arrangements of text and graphical protocols. In addition there are several mediums like cable and videotext by which product information can be …

A Method For The Identification Of Parameters In Nonlinear Time-Varying Discrete Systems, Somo Coulibaly

Theses

The purpose of this thesis is to present a new technique for estimating the unknown parameters of nonlinear discrete time-varying systems.

The method is based on the model-reference control system where the model and the plant are controlled to exhibit the same output trajectory. The model is chosen to be linear and stationary. To develop the procedure of identification we assume that the structure of the nonlinear system is known and all the measurements are free of noise. A feedback input is adapted to improve the scheme. This scheme can be used to simultaneously identify the parameters when the control …

Modeling And Analysis Of Switching Dc-To-Dc Converters, Suresh Hariharan

Theses

Modeling and analysis of switching dc-to-dc converters has been achieved through several techniques. The state space averaging technique is valid only for disturbances which are less than one-tenth the switching frequency. The discrete technique does not yield accurate results. In this thesis a new approach to the stability analysis of switching regulators has been discussed and the model is far more accurate than the state space averaging technique or the discrete technique. It can be easily programmed into any computer and the results compare well with the experimental results. It also gives a good insight into the design of the …

Optimization Of The Sputtering Technology For Preparation Of Hg1-[Subscript X] Cd[Subscript X] Te Heterojunction Diodes, Kyriacos Kokkinos

Theses

The deposition of (Hg_1-xCd_x)Te onto Si and (Hg_1-yCd_y)Te (x>y) substrates by rf triode sputtering was studied. Ionized mercury vapor, in the 0.6 to 1.2 micron pressure range, was used to bombard pressed-powder targets, consisting of HgTe and CdTe particles, with effective target x value of 0.3, 0.35, and 0.4. The sputtering procedure, parameters, and system were modified to optimize film characteristics. Higher substrate temperature (270°C) was required to obtain metallic gray films with x>0.3. With substrate temperatures less than 270°C and deposition rates 0.5-1.0 micron per hour the films were …

An Experimental Investigation Of The Kinetics And Thermal Properties Of Poly(Ethylene) Terephthalate And Its Related Di-Acid Modified Copolymers, Satish Baliga

Theses

Poly(ethylene) Terephthalate , PET, is synthesized from purified Bis-hydroxyethyl Terephthalate,(BHET), in the presence of antimony oxide catalyst. Rate constant for the polycondensation reaction, based on a second order kinetic model is found to be 152.4/mol/hr.

A new modified polyester Polyethylene Adipic Terephthalate (PEAT) is synthesized from BHET and adipic acid. The effect of adipic acid content in the copolymer,on the rate of polycondensation is studied. Adipic acid is shown to improve the activity of the polymer chain ends thereby increasing the apparent reaction rate constants.

The modified polyesters are observed to melt at a lower temperature than PET. Moreover, the …

Synthesis Of Trimethylpropane-Tolylene-2,4-Diisocyanate Adduct And Its Blocked Monomers, Farhad Forohar

Theses

A trimethylolpropane adduct of tolylene-2,4-diisocyanate (TMP-TDI) was prepared by reaction in a heterogeneous solvent system. The isocyanate functional groups of the TMP-TDI adduct were blocked with the following blocking agents: p-cresol, eugenol, o-chlorophenol, and one to one mole ratio of mixtures of 2-hydroxyethyl methacrylate (HEMA) and each of the three preceding blocking agents. A sample of TMP-TDI adduct blocked with only HEMA was also prepared. The products were characterized by melting point, infrared spectroscopy, and elemental analysis. Monomers of TMP-TDI blocked with 50% HEMA and 50% blocking agents may be very useful as dental restorative materials.

Microbial Characteristics Of An Activated Sludge And Three Commercial Preparations After Exposure To Phenolics, Laurie Gneiding

Theses

The biological characteristics of four microbial mixtures were examined after successive exposure to phenol and 2-chlorophenol at room temperature. One of the microbial mixtures was an activated sludge from the Livingston, NJ municipal wastewater treatment plant. The other three mixtures were commercial preparations sold by Polybac Corp.(Hydrobac), Sybron Corp. (BI-CHEM DC 1006/1007), and General Environmental Sciences(LLMO).

The characteristics examined were relative counts and species of gram negative/gram positive bacteria, yeast and fungi, protozoa, and higher organisms. For the gram negative bacteria and yeasts, culturing techniques and diagnostic tubes were used to determine the predominant species. Biochemical tests were done on …

Stability Of Bicomponet Polymeric Liquids In Poiseuille Flow, Chin-Chang Jeng

Theses

Polymer processing, involving two or more components, has become more popular recently in industrial plants. However, product Quality is affected very much by the fluid stability. Some theoretical and experimental results concerning Newtonian and non-Newtonian flow in rectangular coordinates, have been published, and the fluid-fluid interfaces were observed to be unstable by some researchers.

In this paper, the linear stability of bicomponent non-Newtonian fluids flowing in a cylindrical tube was investigated by using the Ellis model. Only the very long wave and the axisymmetric disturbances were considered. The Ellis zero-shear-rate viscosity ratio, m( = η02 / η01 )destabilizing. The half-zero-shear-rate-viscosity …

Homogenous Reaction Kinetics Of Reduction Of Sulfur Dioxide, Satyanarayana Manthani

Theses

Homogeneous reduction of sulfur dioxide by carbon monoxide was investigated in the temperature range between 700 and 1000°C, initial sulfur dioxide concentration of about 3000 ppm, typical of a flue gas from coal fired power plants, and excess carbon monoxide concentration, in a 12 mm O.D. quartz tubular reactor. Over ninty percent reduction of sulfur dioxide was obtained at temperatures above 900°C and space times of the order of about 3.5 seconds. Substantial carbonyl sulfide was also produced.