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Comparative Study Of Lightweight And Normal Weight Concrete In Flexure, Mohammad Zareh

Dissertations and Theses

This investigation represents a comparative study of the flexural behavior of lightweight and normal weight concrete. Both theoretical and experimental moment-curvature characteristics of the tested specimens were used to study the flexural behavior.

A generalized computer program to determine the moment-curvature relationships of a singly reinforced rectangular concrete beam was developed.

For this limited study it was observed that lightweight concrete beams when compared to normal concrete beams achieve comparable moment capacity (about 92% of normal weight concrete) but exhibit higher deflections (about 40% more than normal weight concrete).

Sequences From Nonlinear Feedback Shift Registers., Richard H. Braasch

Electrical and Computer Engineering ETDs

1.1 General Aspects of Shift-Register Generated Sequences

An n-stage register is a device consisting of n consecutive two-state memory units controlled by a clock. At each clock pulse, the state ak (logical 1 or 0) of each memory stage, ak, is shifted to the adjacent stage of higher degree. A shift register may be converted into a code generator through introduction of feedback loops that compute a new shift register state based on the previous state of the register. This feedback shift register principle is illustrated in Figure 1-1.

Static And Dynamic Shear Behavior Of Uniformly Loaded Reinforced Concrete Deep Beams., Robert A. Crist Jr.

Civil Engineering ETDs

The objective of this research Kas to develop behavioral equations for reinforced concrete deep beams especially in the realm of shear capacity. A series of static and dynamic beam tests was performed to aid in the develop­ment of this objective.

Static testing was completed on nine uniformly loaded reinforced concrete deep beams. Span-to-depth ratios varied from 1.6 to 3.3. Intermediate-grade ASTM A 15 reinforcing steel was used. Nominal concrete strength was 3,750 psi. All beams contained longitudinal tensile reinforcing and no compressive reinforcing. Five beams contained an orthogonal array of web reinforcing coincident with the longitudinal axes of the beams …

The Use Of Graphical Techniques In Construction Management, Varne M. Kimmick

Civil Engineering ETDs

The relation and practical uses of graphics in construction management is a study area in which little work, with the exception of the critical path method, has been done. As the subject was begun, it was discovered there was little specific written material on the graphs themselves; therefore, a considerable portion of the thesis was devoted to basic graphics in order to make the discussion relative to construction more meaningful. Chapters I through VII cover the subject of basic graphics. The basic graphics portion was considered essential to the study in order to allow practical use of the work by …

Structural Stability In Earthquake Engineering., Aybars GüRpinar

Civil Engineering ETDs

To pate, only special cases of dynamic stability have been solved. In this dissertation, an attempt is made to obtain practical solutions to the stability problem in earthquake engineering.

A column supporting a concentrated mass at the top is treated as a single-degree-of-freedom system. The system is assumed to be linearly e·1astic with viscous damping. It is subjected to both horizontal and vertical random acceleration at the base, which are taken to be a band limited white noise simulating earthquake motions. The objective of this investigation is to find the probability of instability of the system.

Two methods of solution …

A Study In The Design And Development Of A Baseball Pitching Machine, Neal M. Lundwall

Theses and Dissertations

Throughout history man has had the need of services which require great skill or tremendous strength or delicate consistency on the part of those who perform. Much of the time he has turned to the machine to accomplish these requirements.

Transition From Laminar To Turbulent Flow For A Two-Phase Mixture, Mohammed Sharief Qureshi

Theses and Dissertations

A phase is simply one of the states of matter. Multiphase flow is the simultaneous flow of several phases. Two-phase flow is the simplest case of multiphase flow.

A Correlation Study Of The Washington Pre-College Test Scores To Determine Which Scores Are The Best Predictors Of Success In Flight Aviation At The Big Bend Community College, Richard H. Pearce

All Master's Theses

The purpose of this study is to determine how a student's Washington Pre-College test results and his high school grade point average can best be used in deciding which people have the greatest chance to succeed in the Big Bend Community College flight aviation program. For the past four years of the aviation program it has been necessary to choose approximately seventy students for the program from as many as two hundred applicants. The counseling staff of the college in cooperation with the flight aviation department has used the high school grade point average as a primary tool in order …

A Computer Simulation Of A Partial Venous System Of A Human Lower Extremity, David C. Smith

Theses and Dissertations

The human body is truly a fascinating and complex creation of our Maker. Because of the complexity and variability, many of its workings were little known until recent years. Some of the more amazing facts of the circulatory system follow. If the individual blood vessels of a single adult, i.e., artery, arteriole capillary, venule and vein, were laid end to end, they would extend more than 60,000 miles. For the average adult, the heart beats 70 times per minute; for the well-conditioned athlete, 50-60 beats per minute; and for the extraordinary athlete, as few as 37 times per minute. The …

Transient Convective Heat Transfer Coefficient For Injection Into Rigid Vessel, James Edward Steiger

Theses and Dissertations

The purpose of this study was to develop and demonstrate a method for experimentally determining the convective heat transfer in a rigid vessel while air was being injected. The heat transfer took place between the air in the pressurized vessel and the surrounding walls which were maintained at a temperature of 32 F. with a circulating ice water bath. The study considers the effects of injection geometry and injection flow rate on the heat transfer process. The problem of heat transfer after injection has been considered by Means (1), and was responsible for establishing this study. The experimental technique used …

Conduction Error In Thermocouples Embedded In Low Conductivity Material, Tumkur G. Nagaraju

Theses and Dissertations

Thermocouples are generally used as devices to determine the internal temperature of any material. The purpose of the temperature measuring device is to measure the temperature which would exist at some known location if the device were not present. The thermocouples are embedded in the material in order to study the temperature-time history of the point of location. The presence of the thermocouple induces error in the temperature measured. This error becomes significant if heat is conducted into or away from the point of measurement by the sensor itself, or if the sensor insulates the point. This would result from …

Fastener Strength In Diaphragm Braced Members, Amir Simaan, George Winter, Teoman Peköz

CCFSS Library (1939 - present)

SUMMARY In conjunction with research projects on diaphragm-braced members conducted at Cornell University, this investigation deals with the function of the fasteners in the braced system. In these systems, the diaphragm resists the lateral deflections of the braced members, in its plane, by virtue of its shear regidity (Qdr) and its shear strain capacity Yd (as a measure of strength). Considering the system in a slightly deformed shape, compatibility of displacements and forces between the diaphragm and the braced member at their connection locations, implies that the fasteners at these locations are subjected to the action of a system of …

Strain Measurements At Extremely High Temperatures Using Moiré Fringe Techniques., Joseph W. Neudecker Jr.

Mechanical Engineering ETDs

A new procedure is described for using the moiré-fringe technique to measure strains in structural materials at temperatures exceeding 1300 °C. The principal factor found to be necessary for successful viewing of moiré patterns at extremely high temperatures is the use of reflected laser light for viewing the strained grid on the material. This factor is extensively discussed and experiments are described in which strain measurements were successfully made on graphite specimens at elevated temperatures. It is concluded that the techniques described constitute a more feasible method of measuring strains at higher temperatures than is possible by any other known …

A Comparison Of Technologist Needs And Training Requirements Of The Major Industries Within The State Of Utah, Gene E. Forsberg

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The technologist needs and training requirements were determined from a selected cross-section of Utah industrial firms.

The larger industries were significantly more aware of the training requirements and capabilities of four-year technologists than were the smaller firms.

A significant difference was found regarding general and specialized training required by each firm. Thirteen of the 16 responding firms indicated specialized training as being most important.

The 10 areas of technical training rated most critical in their order of importance were: electronics, technical writing, electricity, English, mathematics (calculus and above), machine shop, manufacturing processes, physics, and metallurgy and design.

There was no …

A Statistical Theory Of Avalanche Breakdown In Silicon, Terence Vincent Sewards

Electrical and Computer Engineering ETDs

A statistical theory of avalanche breakdown in silicon is presented, based on the conventional Boltzmann transport equation. The scattering mechanisms considered are impact ionization (electron-hole pair production), phonon emission and absorption, thermal generation and recombination. The resultant critical field is found to depend on the recombination statistics, which were ignored in previous theories of avalanche breakdown. The theoretical temperature dependence is compared with the temperature dependence of the breakdown voltages of three conunercial diodes.

The Development And Use Of Scattering Parameters For Semiconductor Junction Devices, Lee Dennis Philipp

Electrical and Computer Engineering ETDs

Scattering parameters are developed for diodes and tran­sistors. The parameters are developed through a modification of the wave equation from quantum mechanics. The effects of pulsed X-ray radiation on these devices is then calculated with the use of these parameters.

Various methods of analyzing semiconductor junction de­vices are discussed. These methods include diffusion theory, invariant imbedding and quantum mechanics. The background in these areas necessary for a discussion of semiconductor models is outlined.

Models resulting from the three basic approaches are presented. These include the Ebers-Moll Model, the Charge Control Model, the Linville Model, the Gore Model, the MLB (McKelvey, …

Damping Capacity Of A Model Steel Structure, Dixon Rea, R. W. Clough, Jack G. Bouwkamp

CCFSS Library (1939 - present)

The damping capacities of seven model steel structures, each consisting of a heavy steel platform supported on four columns, have been determined from forced vibration tests. The vibrations were produced by an eccentric-mass vibration generator, and the amplitudes ranged from small displacements up to slightly greater than yield displacement. The tests were terminated at the higher amplitudes once fatigue cracks formed in any of the joint welds in the columns. For vibration amplitudes up to a critical amplitude slightly less than yield displacement, the damping factors of the structures were constant, independent of amplitude, and ranged between .15 and .25~ …

Computer Simulation Of Unsteady Flow In An Alluvial Channel By The Method Of Characteristics, Dennis Lynn Richards

Electronic Theses and Dissertations

A number of dams have been constructed along alluvial rivers. These dams create reservoirs which serve to collect and store water, usually in large quantity, for use in supplying municipal needs, for supplying power and driving machinery, for furnishing irrigation, and for retaining the flow in time of floods. The characteristics of flow and the sediment-transport capacity of the channel change after these dams have been constructed. One of the major problems then confronting the hydraulic engineer is the rate of reservoir sedimentation and the change in river configuration. A problem of concern is the rapidity of reservoir sedimentation and …

Thermal Lattice Expansion Of Various Types Of Solids, Jayantkumar Shantilal Shah

Doctoral Dissertations

"Thermal lattice expansion studies of various types of solids were carried out in this investigation and were corelated to their crystallographic and various other properties. The advantages and limitations of various methods of studying thermal expansion are discussed in detail. A new design for a versatile low temperature camera to study expansion by an X-ray method is proposed. The thermal lattice expansion of silicon was negative below 119ºK. This behavior is discussed in terms of crystal structure and interatomic bonding. Diamond exhibits no anomalous thermal expansion. Lattice parameter data for many metals at low temperatures are reported for the first …

History Of Utah's Salt Industry 1847-1970, John L. Clark

Theses and Dissertations

Utah salt makers have extracted salt from three sources, the principal of these being brine from Great Salt Lake. Other sources are saline beds in Great Salt Lake Desert and subterranean halite formations in central Utah.

This study traces the development of methods used to recover and refine salt by the industry, in general, and by specific companies. It provides brief, historical sketches of the major corporations and the economic, legal, and environmental factors affecting their growth.

Utah produces about 1 per cent of the nation's salt, exporting over half of it from the state. The major factors limiting the …

Experimental Investigation Of Shock Boundary Layer Interaction For Two-Dimensional And Axisymmetric Flow, A. Shawki Zahran

Electronic Theses and Dissertations

A supersonic wind-tunnel has been constructed using an 8 inch by 10 inch single stage jet vacuum ejector with a capacity of handling 0.4 lb/sec air at 4 inches Hg absolute suction pressure. A Toepler Schlieren system with 10-inch diameter parabolic mirrors has been set up for flow pattern visualization. The same apparatus was developed to obtain multi-colored views of the flow pattern. That was accomplished by placing an equilateral prism in front of the light source located at the focal plane of the first parabolic mirror. A spectrum was thus produced at the focal plane of the second parabolic …

Screening Electrocardiograms Using Hotelling's Method Of Principle Components, Edward G. Schwartz

Electronic Theses and Dissertations

Considerable use is presently being made of computers to classify electrocardiograms (ECGs) into various heart defect categories. An example of such a program is the "Electrocardiographic Analysis Program" developed jointly by the Mayo Clinic and IBM. In one of Dr. Caceres published reports, he tells of using a computer program which involves 5,000 instructions. Dr. Caceres does not say whether this is a commercial program or one of bis own. His description does place this program in the same general category as IBM's. These programs have the common criteria of examining the ECG for the same information that a cardiologist …

An Evaluation Of An Aerated Lagoon System Treating Combined Dairy And Domestic Wastes During Summer Operation, Douglas M. Skie

Electronic Theses and Dissertations

The Water Quality Act of 1965 and the adoption of the subsequent state water quality standards emphasized the general public's concern for the control of water pollution; for it has become the goal of our nation to maintain all American waters in a suitable condition for domestic and industrial supply, for recreation and for other beneficial uses. It is for these reasons that many communities have been faced with the problem of constructing new sewage treatment facilities or expanding present operations. The use of stabilization ponds as a means of providing sewage treatment has been the practice of many small …

Liquid Viscosity Measurement Using A Buret: An Instructional Technique, Charles A. Sorrell

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

A Software System For Interactive Man-Machine Design And Analysis Of Electronic Circuits, Leo William Midden

Masters Theses

"The development of an interactive computer-aided circuit analysis program is presented. A graphics terminal is used as an I/O device while an SCC 650 mini-computer is used as peripheral processor. The central processor is an IBM 360/50.

Formulation, capabilities and use of the system are discussed in detail. Close attention is given to user control, making the system both useful and versatile. Both hard and soft copies of all plots and tabular data are available. Provisions are made for error corrections and changes at each step of the input. Parameter values can be altered before and after each analysis.

Additionally, …

Mechanical Properties Of Low Carbon Martensite, Allen L. Affolter

Masters Theses

"Steels of three different compositions were heat treated and tensile tested in order to determine their mechanical properties after heat treatment. All samples had near 0.20 per cent carbon and two manganese levels 0.90 per cent and 1.35 per cent. One group containing the higher manganese level also had small additions of columbium and vanadium. The specimens were too brittle in the as-quenched condition to be loaded to full strength. Maximum strength and ductility were found after short time tempering at low tempering temperatures -- 2 to 15 minutes at 200º to 300ºF. Higher strengths were found at the low …

The Artificial Sedimentation Of Soil, John Richard Wagner

Masters Theses

"Previous investigations concerned with artificially sedimented soils and a review of the literature on soil structure are summarized. These studies show that many of the physical properties of a soil depend upon its structure and that the structure of a sedimented soil depends principally upon the salt content of the pore water. In addition, artificially sedimented soils have been shown to have a "natural" soil structure. An apparatus was developed which will automatically sediment soils in water of controlled salt content. To determine whether or not the apparatus was able to sediment uniform and homogeneous soil samples, moisture content determinations, …

Maximum-Distance Linear Codes, Gary K. Maki, James H. Tracey

Electrical and Computer Engineering Faculty Research & Creative Works

Described here is a linear code that has a maximum distance between codewords of k for a code of order 2k. Since the minimum-maximum distance is k for a code of order 2k, a class of minimum-maximum distance codes results. For an (n,k) linear code, k ≤ n ≤ k + k∣2 for k even and k ≤ n ≤ k + (k - 1)/2 for k odd. Maximum-distance codes are found useful in encoding the states of sequential circuits. © 1971, IEEE. All rights reserved.

Diffusion Coefficients Of Ethylene Glycol And Cyclohexanol In The Solvents Ethylene Glycol, Diethylene Glycol, And Propylene Glycol As A Function Of Temperature, Ronald D. Mitchell, James W. Moore, Robert M. Wellek

Chemical and Biochemical Engineering Faculty Research & Creative Works

No abstract provided.

Internal Friction Of Ion Exchanged Li₂O•Al₂O₃•2sio₂ Glasses, A. Ismail A. Abdel-Latif

Doctoral Dissertations

"Li₂O•Al₂O₂•2SiO₂ glass fibers were ion-exchanged from 1 to 300 minutes in a sodium nitrate bath at 366ºC. The internal friction was measured along with the lithium and sodium concentration profiles. As sodium progressively replaced lithium, the alkali internal friction peak became smaller while a new peak (mixed alkali peak) appeared and increased in magnitude. These changes in the internal friction are similar to those that occur upon the addition of a second alkali to glasses prepared by conventional melting. The magnitude of both internal friction peaks in ion exchanged glasses was dependent on the overall glass composition. The magnitude of …