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Articles 31 - 60 of 71

Full-Text Articles in Engineering

Minimum Weight Design Of Frames Using Sway Subassemblage Theory, Hiroshi Yoshida Jan 1969

Minimum Weight Design Of Frames Using Sway Subassemblage Theory, Hiroshi Yoshida

Theses and Dissertations

This thesis considers the theoretical development of a minimum weight design procedure for unbraced multi-story frames which are subjected to combined gravity and wind loads.


Molecular Weight Distribution In Emulsion Polymerisation, Ashok K. Taori Jan 1969

Molecular Weight Distribution In Emulsion Polymerisation, Ashok K. Taori

Theses and Dissertations

No abstract provided.


An Experimental And Correlative Study Of The Equilibrium Liquid And Vapor Phases Of Solutions Of Carbon Dioxide And Difluoromethane, Robert Arthur Adams Jan 1969

An Experimental And Correlative Study Of The Equilibrium Liquid And Vapor Phases Of Solutions Of Carbon Dioxide And Difluoromethane, Robert Arthur Adams

Theses and Dissertations

No abstract provided.


The Influence Of Surface Characteristics On Single Phase Liquid Heat Transfer, Goutan R. Hattiangadi Jan 1969

The Influence Of Surface Characteristics On Single Phase Liquid Heat Transfer, Goutan R. Hattiangadi

Theses and Dissertations

No abstract provided.


A Study On The Condensation Coefficient Of Water, Nelson Edward Malwitz Jan 1969

A Study On The Condensation Coefficient Of Water, Nelson Edward Malwitz

Theses and Dissertations

No abstract provided.


An Empirical Determination Of The Characteristic Impedance Of Rectangular Strip Transmission Lines With Offset Inner Conductors, Joseph R. Bouvier Jan 1969

An Empirical Determination Of The Characteristic Impedance Of Rectangular Strip Transmission Lines With Offset Inner Conductors, Joseph R. Bouvier

Theses and Dissertations

This thesis presents an experimental approach to the problem of finding the characteristic impedance of a rectangular stripline with an off-set inner conductor. It employs an enlarged scale model of the transmission line, immersed in an electrolytic tank, as one branch of a simple bridge circuit. One adjacent branch of the bridge circuit consists of a similar model of a transmission line with known characteristic impedance. A complete analogy is derived between the field pattern in the transmission line and the current pattern in the model.


Measurement Of Residual Stresses - A Study Of Methods, Negussie Tebedge Jan 1969

Measurement Of Residual Stresses - A Study Of Methods, Negussie Tebedge

Theses and Dissertations

The large number of residual stress measurements involved in the research project "Residual Stresses in Thick Welded Plates" required a study of different methods of residual stress measurement. In this thesis different techniques of residual stress measurement are investigated with points of consideration as to their applicability, simplicity, economy, accuracy and saving in time.


An Experimental Method For Determining Cutting Forces, Kiran M. Gandhi Jan 1969

An Experimental Method For Determining Cutting Forces, Kiran M. Gandhi

Theses and Dissertations

The prediction of the force required to cut a material has been one of the central problems of interest in metal cutting. Many theories have been presented, but because of their predictive inaccuracies, they have rendered themselves wholly unacceptable for practical use. In this thesis an empirical method of predicting the forces produced during cutting is developed for SAE 1117, CRS, SAE 4145 HRS and SSE 6150 HRS materials. The same type of empirical method is also presented to predict cutting forces for any type of steel by knowing its ultimate shear strength. This can be used to predict the ...


The Strength Of Welded Flame-Cut Columns Of Astm A572 Steel, Yoshio Kishima Jan 1969

The Strength Of Welded Flame-Cut Columns Of Astm A572 Steel, Yoshio Kishima

Theses and Dissertations

This thesis describes the results of an extensive investigation into the strength and behavior of steel wide-flange columns welded from flame-cut plates. The material chosen for the study is ASTM A572 (Grade 50) steel.


Experimental Study Of Transient Properties Of A Wide Pin Diode, Mahendra I. Patel Jan 1969

Experimental Study Of Transient Properties Of A Wide Pin Diode, Mahendra I. Patel

Theses and Dissertations

The purpose of this thesis has been to study some of the properties of the hole-electron plasma in the i-layer of a wide p-i-n diode, particularly phenomena associated with the build-up of plasma in a diode, initially at equilibrium, excited with various voltage signals. The investigations of changes in plasma density with time have made use of the fact that this quantity is almost linearly related to the conductance of the diode. Thus the study was carried out by observing the transmitted current resulting from the application of various signals.


Boiling Heat Transfer In Vertical Upflow And Downflow Tubes Using A Multicomponent Fluid, James P. Quaile Jan 1969

Boiling Heat Transfer In Vertical Upflow And Downflow Tubes Using A Multicomponent Fluid, James P. Quaile

Theses and Dissertations

Non-boiling and boiling heat transfer experiments were conducted in vertical tubes using Varsol, a hydro-carbon mixture. A computer program was developed to perform data recudtion analysis and is presented in the appendix.


A Computational Procedure For Solving Multiple Choice Integer Programming Problems With Zero-One Variables, Joe C. Alexander Jan 1969

A Computational Procedure For Solving Multiple Choice Integer Programming Problems With Zero-One Variables, Joe C. Alexander

Theses and Dissertations

The multiple choice integer programming problem is one for which practical applications frequently arise. A computational procedure which optimally solves problems of this structure is developed by the author. The proposed procedure takes advantage of the particular characteristics of different types of problems within the multiple choice class. The method is primarily a branch and bound procedure which implicitly enumerates all of the possible combinations.


Traffic Congestion In Shop Collection Systems, George D. Boardman Jan 1969

Traffic Congestion In Shop Collection Systems, George D. Boardman

Theses and Dissertations

A computer simulation model is developed which will aid in predicting the data traffic congestion for shop data collection systems. Two data traffic input distributions, Poisson and Bernoulli, gamma distributed service times; and random or order of arrival queue discipline.


Characterization Of The Interdigital Gap Capacitor For Microwave Stripline And Microstrip Applications, Frederick M. Goll Jan 1969

Characterization Of The Interdigital Gap Capacitor For Microwave Stripline And Microstrip Applications, Frederick M. Goll

Theses and Dissertations

This thesis concerns the development of an equivalent circuit model and the associated theory necessary to characterize the interdigital gap capacitor throughout the frequency range. The results of this study show that the interdigital gap capacitor can be approximated as a lumped series capacitor for frequencies, where the capacitor digit length is less than 2% of a wave length.


A Method Of Estimating The Value Of A Computer Based On-Line Operations Control System In A Production Shop, James V. Goodbarn Jan 1969

A Method Of Estimating The Value Of A Computer Based On-Line Operations Control System In A Production Shop, James V. Goodbarn

Theses and Dissertations

A simulation program is presented that develops a risk profile of the intended investment. The risk profile is essentially a return on investment probability analysis developed from the estimated distributions of costs, service life and savings of the intended investment in a computer based, on-line system. The author concludes that investments in computer based on-line operations control systems in production shops can be evaluated through use of the risk analysis or return-probability techniques given, but that conventional cash flow analysis techniques may result in overstating the probable return on investment.


Human Factors Evaluation Of Techniques For The Manual Entry Of Data Into Source Data Collection Systems, Otis P. Lutz Jan 1969

Human Factors Evaluation Of Techniques For The Manual Entry Of Data Into Source Data Collection Systems, Otis P. Lutz

Theses and Dissertations

This study evaluated six input configurations which can be used for the manual entry of numeric data into source data collection systems. The input configurations evaluated were: Touch-Tone keyboard with and without voice answerback, teletype keyboard, slidebars, rotary knobs, and thumbwheels. Two groups with 8 subjects in each entered numeric messages into the input configurations.


A Computational Procedure For Obtaining The Minimum Makespan Solution To The Machine Scheduling Problem With Job And Machine Start Constraints And Job Passing Permitted, Peter Long Jan 1969

A Computational Procedure For Obtaining The Minimum Makespan Solution To The Machine Scheduling Problem With Job And Machine Start Constraints And Job Passing Permitted, Peter Long

Theses and Dissertations

The problem of balancing an assembly line has been facilitated by a number of analytic methods for which computer programs are available. The feasibility of using the variable element time balancing algorithm was investigated in reference to the task of setting up an assembly line type operation for the reconditioning of units which are disassembled, repaired, and returned to inventory and subsequent use.


As Study In The Design Of An Assembly Line For Reconditioning Items, Thomas B. Long Jr. Jan 1969

As Study In The Design Of An Assembly Line For Reconditioning Items, Thomas B. Long Jr.

Theses and Dissertations

The problem of balancing an assembly line has been facilitated by a number of analytic methods for which computer programs are available. The majority of such techniques accept only deterministic values as the element times of the operations.


Models For Bivariate Process Control On Central Tendency, Anthony J. Pellecchia Jan 1969

Models For Bivariate Process Control On Central Tendency, Anthony J. Pellecchia

Theses and Dissertations

As an introduction to a 2-part problem, the models for bivariatge control of central tendency, including the Shewhart, the Hotelling T2, and the elliptical control charts are reviewed. Included are background material on the bivariate normal distribution, the Multivariate Central Limit Theorem, and a demonstration of the equivalence of the Hotelling T2 control chart to the elliptical control region.


Evaluation Of The Risk When Monthly Auditing Standards Are Imposed By Sampling With Weighed Attributes, David A. Rockwell Jan 1969

Evaluation Of The Risk When Monthly Auditing Standards Are Imposed By Sampling With Weighed Attributes, David A. Rockwell

Theses and Dissertations

A method is developed to assist the producer in controlling the product quality where monthly auditing standards are imposed after final inspection. The control involves monitoring the numer of demerits accumulated by the auditing department and finding the risk that the product will be rated out of control at the end of the month. Thus the method is intended to be employed in addition to present control techniques.


An Investigation Of Branch-And Bound Techniques For Solving The Facilties-Location Assignment Problem, Lloyd C. Turner Jan 1969

An Investigation Of Branch-And Bound Techniques For Solving The Facilties-Location Assignment Problem, Lloyd C. Turner

Theses and Dissertations

Optimal producing procedures for the facilities-location assignment problem have been impractical because of the long computer solution times required for even the relatively small problems. Two new algorithms are presented in this paper and their improved capabilities are demonstrated. The responses of these algorithms to several input parameters are also investigated.


An Optimal Sequence Sensitivity Analysis For The Flow Shop Scheduling Model, Milan M. Sowis Jan 1969

An Optimal Sequence Sensitivity Analysis For The Flow Shop Scheduling Model, Milan M. Sowis

Theses and Dissertations

The problem of constructing an optimal schedule or sequence, given that there are n jobs and m machines, has been intensively studied by many investigators. This paper presents an analysis of the effects on the optimum sequence of changing the time of a single operation after an optimal schedule has been determined but before the schedule has actually commenced.


An Industrial Dynamics Study Of A Distributing House Operation For Reparable Items, Joseph J. Westlake Jan 1969

An Industrial Dynamics Study Of A Distributing House Operation For Reparable Items, Joseph J. Westlake

Theses and Dissertations

Industrial Dynamics is a method for studying industrial, social, or economic systems with which it is hoped to discover the underlying nature of these systems in order to develop a theory of management in the sense of the basic theories and laws of physics. This paper presents an Industrial Dynamics study of an actual Distributing House operation at the micro-economic level of analysis.


The Behavior Of Thixotropic Fluids In Constant Shear Rate Experiments, Donald D. Joye Jan 1969

The Behavior Of Thixotropic Fluids In Constant Shear Rate Experiments, Donald D. Joye

Theses and Dissertations

No abstract provided.


Feedforward Control Of A Binary Distillation Column Using The Feed Tray Location As The Manipulative Variable, Emmett J. Speicher Jan 1969

Feedforward Control Of A Binary Distillation Column Using The Feed Tray Location As The Manipulative Variable, Emmett J. Speicher

Theses and Dissertations

No abstract provided.


Flow Pattern Optimization Study Of Sulfur Recovery Plant, Ronald Dennis Istivan Jan 1969

Flow Pattern Optimization Study Of Sulfur Recovery Plant, Ronald Dennis Istivan

Theses and Dissertations

No abstract provided.


Moving Cracks In A Finite Strip Under Longitudinal Shear, Tony Er-Ping Chen Jan 1969

Moving Cracks In A Finite Strip Under Longitudinal Shear, Tony Er-Ping Chen

Theses and Dissertations

Investigated is the anti-plane stress distribution around a semi-infinite crack traveling with constant velocity in an infinitely long strip of finite width. The problem is reduced to the solution of the Hilbert problem of the half plane by the application of the Schwarz-Christoffel conformal transformation and the theory of complex functions.


Threshold Characteristics Of Frequency Modulation Noise, Charles J. Ludinsky Jan 1969

Threshold Characteristics Of Frequency Modulation Noise, Charles J. Ludinsky

Theses and Dissertations

This paper presents a study of the behavior of an FM system with carrier-to-noise ratios in the threshold region. This study was directed toward determination of the statistical distribution of the noise output.


Transient Properties Of A Wide P I N Diode, Karl Kerchmar Jan 1969

Transient Properties Of A Wide P I N Diode, Karl Kerchmar

Theses and Dissertations

This thesis consisted of a study of the transient response of a p-i-n diode with wide i layer. Attention was directed to investigating the time required for transition from high impedance to low impedance after application of a voltage stop. This transient process was assumed to be related to the time required for formation of a neutral hole-electron plasma out of the clouds of holes and electrons injected from the P and N regions, respectively.


An Experimental Investigation Of The Velocity And Heat Generation Characteristics Of A Fixed Boundary Fracture Model, Thomas L. Paxson Jan 1969

An Experimental Investigation Of The Velocity And Heat Generation Characteristics Of A Fixed Boundary Fracture Model, Thomas L. Paxson

Theses and Dissertations

An experimental investigation of the fracture velocity characteristics of a quasi-brittle material under fixed boundary conditions has been conducted. In addition, an apparatus to measure the heat generated by a quai-static, propagating crack has been designed.