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Articles 1 - 17 of 17
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Mathematical Model Of Temperature Profiles And Coking In A Crude Oil Heater Tube, Joseph C. Polimeni
Mathematical Model Of Temperature Profiles And Coking In A Crude Oil Heater Tube, Joseph C. Polimeni
Theses
A mathematical model to predict temperature profiles and coking of crude oil in furnace tubes is presented. The model assumes that the coking mechanism is due to a reaction in the laminar sublayer, whose rate depends upon the temperature profile. That profile is obtained by a numerical solution of the appropriate transport equations, with velocity profiles that may be laminar or turbulent, and including the temperature dependence of the crude oil properties. In addition, velocity and temperature profiles were adjusted when necessary to ensure closure of the heat and material balances. As a by-product of this study, a correction was …
Kinetics Of Biodegradation Of Phenol And 2,6-Dichlorophenol, Samir Shrikant Desai
Kinetics Of Biodegradation Of Phenol And 2,6-Dichlorophenol, Samir Shrikant Desai
Theses
Biological removal of phenol up to 600 ppm and 2,6-dichlorophenol up to 20 ppm was studied in a well aerated fill-and-draw reactor of 41 capacity at 26 C using an activated sludge obtained from the municipal treatment plant in Livingston, N.J. Experimental evaluation of kinetic parameters showed that biodegradation of both phenol and 2,6-DCP followed zero-order kinetics. As expected, the lag time for both compounds was considerably reduced when acclimated sludge was used. However, the metabolism of 2,6-DCP was very slow even for preacclimated sludge, requiring about 36 hours to degrade only 15 ppm.. This was markedly improved by the …
The Lewis-Matheson Method On Computer, William Raymond Castner
The Lewis-Matheson Method On Computer, William Raymond Castner
Theses
Lewis and Matheson, in the early 1930's, developed a manual calculation technique for the solution of multicomponent distillation problems. The object of this study was to see if there would be any advantage to using the Lewis-Matheson method, once incorporated onto a computer, over current multicomponent distillation solution techniques. The immediate advantage of using the L-M technique is that it requires fewer preliminary calculations than other computer methods. It was found that the L-M technique uses about half the execution time of a typical Newton-Raphson program, while using only one tenth the computer core (memory). This was not intended to …
Mathematical Modeling Of The Unsteady State Glucose And Insulin Concentrations In Blood For Normal Subjects And Diabetics, Tung Shih
Theses
A mathematical model of the blood-glucose regulatory system has been developed. This model describes an oral glucose tolerance test adequately and simulates the behavior of the real physiological system using computer techniques.
Regression of the rate constants involved have been effected by conforming the theoretical functions to the data from glucose tolerance test in nonobese normal subjects, obese normal subjects, nonobese mild diabetics, obese mild diabetics, nonobese moderate diabetics and obese moderate diabetics measured by continuous sampling after oral ingestion. Most of the data were conformed within the limits of experimental error. The result of optimal parameters lead to a …
Gallium Nitride Film Deposition By Ionized Cluster Beam Epitaxy, Ghulum Bakiri
Gallium Nitride Film Deposition By Ionized Cluster Beam Epitaxy, Ghulum Bakiri
Theses
An experimental Ionized Cluster Beam System similar in design to the one developed at Kyoto University in Japan was. designed and constructed in the Microelectronics Laboratory at NJIT. This involved making the working drawings, having the parts machined and then assembling the system in a vacuum system together with the necessary variable power supplies, meters, controls, gas inlets, cooling water connections, etc.
Eleven deposition runs were then attempted to grow gallium nitride utilizing the system constructed. In a typical deposition run, gallium was vaporized from a boron nitride crucible at 1000° C and allowed to expand through a 0.5 mm …
The Role Of Electrical Noise In Screening Transformers Prone To Failure, Rajeev D. Shirodkar
The Role Of Electrical Noise In Screening Transformers Prone To Failure, Rajeev D. Shirodkar
Theses
Insulation used as a barrier between the high voltage and low voltage windings of a transformer has sites of in- homogeneities like pinholes, cracks or voids, developed during the manufacturing process. Thus, these minute air pockets are stressed much more than the solid dielectric, on the application of a voltage stress, because the dielectric constant of the solid insulation is many times that of the air dielectric. As a result, excitation or ionization takes place in the air (gases). The amount of excited or ionized molecules is proportional to the volume of the inhomogenei- ties within the insulation.
Therefore, experiments …
Automation Considerations For A Manufacturing System, Marvin Fachuan Wang
Automation Considerations For A Manufacturing System, Marvin Fachuan Wang
Theses
This thesis examines the present manufacturing system of Apollo Valve Company, a solenoid control valves manufacturing. After analyzing the present system, the automation considerations and proposed new system were recommended.
Chapter 1 presenti the background material of automation and manufacturing system. The development of the automated factory is also included. The plant layout, organization, and departments functions of the present system are briefly described in the Chapter 2. Analysis of the present manufacturing system by the production volume, by plant layout, and by the manufacturing operations, is discussed in Chapter 3.
Proposed automation considerations and improvements, such as group technology …
Analysis And Tests [Of] L-Shaped Reinforced Concrete Column Under Combined Biaxial Bending And Axial Compression, Alaedin Majlesi
Analysis And Tests [Of] L-Shaped Reinforced Concrete Column Under Combined Biaxial Bending And Axial Compression, Alaedin Majlesi
Theses
A total of five tests on biaxially loaded column specimens were conducted to investigate the complete behavior of load-deformation characteristics from zero load until failure. The specimens were tested under horizontal position with 60 ton hydrolic jack. Pin end was used for both ends to obtain higher accuracy of plotting curves.
Two specimens were tested with dial gages to obtain load-deflection curves and the other three specimens were tested with demec and strain gages to obtain load strain and moment-curvature curves. The strain gages were measured by weston bridge and deme-gages were measured by mechanical dial gage.
The above moment-curvature …
Finite Element Analysis Of The Femoral Head, Ghandikota Ramamurthy
Finite Element Analysis Of The Femoral Head, Ghandikota Ramamurthy
Theses
Femoral component loosening and Prosthetic stem fractures have renewed interest in conservative alternatives to conventional total hip replacements. One such alternative is the concept of surface replacement. The objective in this study is a finite element analysis of a femoral surface replacement cup with Particular attention given to the interfacial stresses. An axisymmetric model with a grid of two-dimensional isoparametric elements is generated. This study utilizes an adaptive model so as to include the effect of bone remodeling in response to stress. The stiffness is considered to be linearly proportional to the stress in the femoral head and neck. Isotropic …
The Operational Utility Of The Walton-Mckersie Attitudinal Structuring Model In Collective Bargaining, Donald Warren
The Operational Utility Of The Walton-Mckersie Attitudinal Structuring Model In Collective Bargaining, Donald Warren
Theses
This work is an heuristic inquiry into behavioral change theory designed for application to labor/management interaction in collective bargaining. The theory itself was postulated by Richard E. Walton and Robert B. McKersie in their book A Behavioral Theory Of Labor Negotiations. The principles of their theory are highly axiomatic and their importance and validity can only be recognized through applied empirical analyses that demonstrate or refute its concept.
The aspect of the theory which is the focal point of this research pertains to the structuring and restructuring of attitudes and attendant relationships resulting from the collective bargaining process. The objective …
Mathematical Modeling Of Mass Transfer In A Hollow Fiber Dialyzer, Tzyy-Kai Yu
Mathematical Modeling Of Mass Transfer In A Hollow Fiber Dialyzer, Tzyy-Kai Yu
Theses
A mathematical model describing the flow characteristics and mass transfer has been developed for the hollow fiber dialyzer in countercurrent dialysis.
The theoretical expressions are developed from a typical Graetz problem for the stream side, and a first order differential equation for the dialyzate side. The solution of the dimensionless concentration profile is obtained as a summation of orthogonal eigenfunctions in closed form, which are given as product of an exponential function and a confluent hypergeometric function.
The analytical solution of the model has been examined by adjusting system parameters, like Sherwood number, Peclet number and the geometry of the …
Computer Simulation Of Cavity Filling During Injection Molding Process, Sumit Banerjee
Computer Simulation Of Cavity Filling During Injection Molding Process, Sumit Banerjee
Theses
A numerical technique is proposed for the simulation of cavity filling process during injection molding of glass-bead filled polypropylene. The mold cavity is of cylindrical shape. Marker And Cell (MAC) method is utilized for solving the transient flow phenomena, after a mathematical simulation of the flow model is carried out by using the relevant continuity and-momentum equations governing the system. The complexity of the equations involved, results in the simplifying assumption of incompressible and isothermal flow process. A computer program is written on the basis of finite-difference equations developed during the application of MAC method under the prevailing conditions.
The …
One-Dimensional Compressible Flow Analysis : Isentropic And Normal Shock, Su-Bo Wong
One-Dimensional Compressible Flow Analysis : Isentropic And Normal Shock, Su-Bo Wong
Theses
A computer program to compute and analyse one-dimensional isentropic compressible flow through variable cross-sectional area with or without a normal shock is developed. The program is written in the "FORTRAN LANGUAGE".
In this work, the area change is the predominant cause of change of flow condition. One of the advantage of this program is set on general uses for isentropic flow. In common practice, the values of the isentropic flow property ratios were tabulated or graphically presented as function of the Mach number with a specified specific heat ratio, K (normally K=1.40 was presented). With todays technology, the most versatile …
Behavior Of Channel-Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Dureseti Chidambarrao
Behavior Of Channel-Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Dureseti Chidambarrao
Theses
The inelastic behavior of irregular shaped reinforced concrete columns has been a constant concern for a structural engineer, to design a safe and economic structure in modern buildings and bridge piers. The shape of the elements in a reinforced concrete structure may be used to optimize its structural strength, to make better use of the available space, to improve the aesthetic appearance of the structure, or to facilitate construction. Due to the locations of the columns, the shapes of the buildings and the nature of the applied loads, many columns are subject to combined biaxial bending and axial load.
Seven …
Failure Surface For L-Shaped Reinforced Concrete Short Columns, Mon-Chen Liu
Failure Surface For L-Shaped Reinforced Concrete Short Columns, Mon-Chen Liu
Theses
Combined bending and axial compression for L-shaped reinforced concrete short columns is a common problem. But the present ACI Building Code (ACI 318-77), handbooks and texbooks pay no attention to this problem. A numerical analysis and computer program developed by Hsu fora reinforced concrete member subject to biaxial bending and axial load has been used Using this computer program, the interaction diagrams and failure surface were developed for L-shaped members under combined bending and axial compression. A comparison between theoretical and experimental results was included to examine the validity of failure surface.
Flow Tube Reactions Of Selected Chlorocarbons With Molecular Hydrogen Or Water Vapor In A Microwave Induced Plasma Reactor, Robert Benedict Barat
Flow Tube Reactions Of Selected Chlorocarbons With Molecular Hydrogen Or Water Vapor In A Microwave Induced Plasma Reactor, Robert Benedict Barat
Theses
The reactions of various chlorinated hydrocarbons with molecular hydrogen or water vapor have been studied in a microwave plasma tubular flow reactor. The investigation of such reactions is desirable because the often toxic parent chlorocarbons are transformed to more thermodynamically stable and relatively non-toxic products by removal of' chlorine atoms as hydrogen chloride. Present detoxification technologies generally employ thermal oxidation as a means of disposal of chlorocarbons, which does not offer a thermodynamically stable sink for the chlorine atoms.
The experimental apparatus included feed introduction systems, a microwave plasma reactor, and full product analyses. The feed systems enabled use of …
Error Detection For Data Communication Systems, John Biancamano
Error Detection For Data Communication Systems, John Biancamano
Theses
A description of the problems encountered in the data communications field and the various solutions can be found in a number of diverse, and often theoretical sources. My intention in writing this thesis is to bring together, in a practical and understandable manner, the theory and the application of a method of error detection used extensively in data communication systems known as the Cyclic Redundancy Check (CRC).
To provide some background on the subject, a description of a data communication system is presented, and the possible sources of error are explored in some detail. Data transmission formats are described, and …