Digital Commons Network^™

Two Dimensional Diffusional Model For Leakage Of Macromolecules In The Interstitial Space, Suthiluk Dumrongsiri

Theses

Two dimensional diffusion of macromolecules through the interstitial in the hamster cheek pouch was studied with intravital fluorescence microscopy. After topical application of Bradykinin, the movement of Fluorescein isothiocyanate (FITC)-labeled dextrans of average molecular weight 150,000 daltons (Dextran 150) was recorded on videotape which latter was played back frame-by-frame for analysis by digital image processing. Leakage of macromolecules in response to topical application of Bradykinin occurs at discrete leakage site in post caplillary venules of 15-25 um diameter, rather than in the capillary themselves. A mathematical model of two dimensional convection plus diffusion was used to simulate the macromolecule transport. …

An Analysis Of The Heating And Densification Process During Rotational Molding Of A Thermoplastic Powder In A Uniaxially Rotating Cylindrical Cavity, Floyd Steven Ribe

Dissertations

This dissertation presents the results of an experimental and theoretical investigation of the heating and densification portion of the rotational molding process in a uniaxial, cylindrical mold.

A thorough literature survey is included which reviewed past analysis of the rotational molding process and other areas that assisted in understanding of the process.

The results presented in this dissertation included an analysis of the densification process by use of Scanning Electronic Microscope (SEM) photography producing intermediate correlations between the physical properties of the densifying material and neck radius of adjacent coalescing spheres. In addition, a hybrid experimental procedure coupled with a …

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 …

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. …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …}

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 …

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 …

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 …

Mixing Effect On Chemical Reaction In Liquid Phase, Ming-Teh Hsu

Dissertations

Mathematical models for the mixing phenomenon are proposed in this study. First model deals Newtonian and non-Newtonian fluid without chemical reaction. The new terminology " degree of mixing " is define in this model for the time-dependency of mixing toward its completeness. The velocity profile and boundary conditions are given, then the degree of mixing can be calculated by the mathematical model. The degree of mixing is influenced by fluid motion and it is function of time.

Second model deals with first-order reaction effected by mixing. A mean fractional conversion is defined to investigate the rate of bhemical reaction. Results …

Simulation Of Particle Size Distribution In Continuous Emulsion Polymerization Through A Modified Population Balance Approach, Ying-Yuh Lu

Theses

A detailed mathematical model for particle size distribution in continuous emulsion polymerization of styrene and vinyl acetate is proposed on the basis of the population balance in the presence of several kinetic and mass transfer processes. This study is limited to the Smith-Ewart case II, which assumes instantaneous free radical termination within polymer particles. Radical desorption mechanism from polymer particles is included in the model and the desorption rate is formulated from the diffusion theory which suggests that the rate coefficient should be inversely proportional to the surface area of polymer particles.

Mathematical Modeling Of Unsteady State Photo-Polymerization, Rong-Fa Liang

Dissertations

Mathematical modeling of unsteady state photopolymerization in an isothermal batch reactor has been investigated. An analytical solution of the distribution of active polymers as a function of reaction time has been determined. It is verified that the quasi-stationary state approximation is valid in the photopolymerization process.

The free radical polymerization of styrene is forced periodically by on-off UV light regulation to the reactor. The effect of operating condition, the ratio of light-off period to light on/off period, on the polydispersity and molecular weight distribution are theoretically and numerically investigated. Significant broadening on molecular weight distribution can be obtained during the …

1984 Nucleus, New Jersey Institute Of Technology

Yearbooks

This is a digitized, downloadable version of the Newark College of Engineering Nucleus.

Mathematical Modeling Of Distillation Operation From Non-Equilibrium Approach, Wen-Dow Pan

Dissertations

A new method for mathematical modeling of a distillation operation from non-equilibrium approach has been studied. The primary purpose of the study was to develop a model to simulate the mechanism of mass transfer between a continuous phase and the bubbles of a dispersed phase in a distillation column. The second major purpose of this work was to utilize and test the model of estimating the tray efficiency.

Distillation was considered to be purely a mass transfer process, where the less volatile component is transferred from vapor to liquid phase, and the more volatile component from liquid to vapor phase. …

Deposition Of Suspension In Inclined Channels Due To The Effects Of Inertia, Gravity And Image Force, I-Hsi Chu

Theses

This investigation was made to determine the effect on the deposition of particle in an inclined parallel-plate channel due to the influences of image charge, viscosity, inertia and gravity. The flow considered was lamina, imcompressible and steady. The flow patterns considered were uniform and fully developed with symmetry about the axis of the channel.

The governing equations derived for a particle were based on Newton's Second Law of motion. Since the resulting governing equations are linear second order differential equations, Runge-Kutta algorithm is used to solve the problem and graphical techniques is used to interpret the results of the numerical …

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 Simulation For Studying The Performance Of Plasticating Extruders, K. S. Govindaraju

Theses

A Computer program for simulation of a single screw plasticating extruder is presented. The computer program simulates the performance of different size extruders with various screw geometries for plasticating and pumping different thermoplastic resins. The simulation yields valuable information on the performance of an extruder for a variety of operating conditions. The simulation program provides a means of separating the effect of one variable at a time on the overall performance of the extruders.

Intelligent Computer Decision Systems, Robert J. Heath

Theses

This paper demonstrates that the concepts developed through Artificial Intelligence research are applicable to computerized information systems; and that a system of expert problem solvers and natural language interfaces exhibiting characteristics of "intelligent behavior" offer several advantages over present-day, conventional database management designs. Development of the conclusion was accomplished after an analysis and assimilation of the current literature in the field of Artificial Intelligence and participation in university symposia concerning its application to the business environment. It is concluded that incorporating the notions of learning and creativity, common sense(heuristics), and self-awareness, intelligent computer decision systems will provide managers with : …