Engineering Commons^™

An Analysis Of A Cathode-Coupled Multivibrator, Fred T. Sinnott

Electrical and Computer Engineering ETDs

The purpose of this study is to develop an analysis for monostable cathode-coupled multivibrators and verify the analysis by experimental results.

Engineering Geology For Dams, Howard T. Bolton

Civil Engineering ETDs

No abstract provided.

Investigations In Prestressed Concrete Design, Anthony Radosevich

Civil Engineering ETDs

No abstract provided.

A Plane Coordinate System For Bernalillo County, Karl V. Morin

Civil Engineering ETDs

The first purpose of this thesis is to frame an enabling act that could be submitted to legislature for adoption. Such an act would authorize the use of plane coordinate system, but not make it mandatory. Twenty-four states have passed laws establishing state coordinate systems.

A second purpose of this thesis is to provide practicing engineers with all the necessary information and explanatory material in one manuscript to permit them to apply the system to their work. An example is worked out in detail using local points known to local men and fully explained step by step.

In addition to …

The Flotation Concentration Of A Complex Low-Grade Lead Zinc Ore, Edward James Fong

Bachelors Theses and Reports, 1928 - 1970

This report is concerned primarily with the beneficiation of a low-grade complex lead-zinc ore. The depletion of high grade veins has caused the mineral engineer to seek deposits deeper in the earth's crust or to find lower grade deposits. The other alternative has placed more research problems on Mineral Dressing Engineers in particularly the iron, copper, lead and zinc fields.

An Analysis Of The Monostable Cathode-Coupled Multivibrator, Joseph C. Connell

Electrical and Computer Engineering ETDs

II. PURPOSE OF THESIS

The foregoing comments pointed out the facts that: 1) little has been done to show the similarity between the multivibrator and the RC amplifier with degenerative feedback; 2) the existing treatment of the conditions under which a linear relationship between pulse duration and applied grid voltage will exist does not give results which are in very good agreement with the values used in a practical circuit.

It is the purpose of this study to fill in these gaps by showing that the equations resulting from an analysis of the cathode-coupled multivibrator are, in general, those of …

A Historical Study Of Flood Prior To 1892 In The Rio Grande Watershed, New Mexico, Rufus H. Carter

Civil Engineering ETDs

The purpose of this study is twofold: first, to collect as much recorded data as possible on the floods in the Rio Grande watershed in New Mexico prior to 1892, and second, to summarize that data with particular reference to hydrologic and economic facts that appear in the record.

An Investigation Of The Water Supply Of The Laramie River Basin And Its Utilization, Omer D. Hall

Civil Engineering ETDs

Many plans have been proposed during the last quarter century for increasing the water supply available to the Laramie River Basin. It is the purpose of this thesis to consider physically possible plans for increasing the available water and to estimate the amount of this increase. The lining of canals on the Wheatland project is suggested and studied in detail.

A Proposed Traffic Interchange For The City Of El Paso, Paul C. Hassler

Civil Engineering ETDs

This survey was conducted at the request of the Traffic Division of the El Paso Police Department for the purpose of improving the supervision and administration of the department. The main conclusions, in addition to the recommendation of certain changes and expansions of the Police Department, was that the city hire a traffic engineer to unsnarl its traffic problems. At this writing preliminary steps have been taken in both directions by the commission.

Host Rocks And Gangue Minerals Associated With Copper Deposits In Plutonic Igneous Rocks, Richard D. Montgomery

Bachelors Theses and Reports, 1928 - 1970

All of the information on the various districts has come directly from published reports. The investigation was suggested by Mr. Forbes Robertson. The geographical extent of the deposits was confined to the western United States. Many of these deposits are of the disseminated porphyry type. A few of the de­posits, such as at Butte, Montana, were of the fissure vein type.

Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen

Bachelors Theses and Reports, 1928 - 1970

As the field work progressed it became apparent that very little was known of the mineralogical associations of the precious metal constituents of the Marget Ann ore. A mineralogical study in excess of that originally planned was then decided upon to de­termine the affiliations exhibited by the silver and gold. With these objectives in mind, the laboratory and field work continued.

Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue

Bachelors Theses and Reports, 1928 - 1970

One of the reasons why steel is the most versatile of all the metals available for engineering applications is because of the wide range of properties that can be obtained from it by proper heat treatment.

The Orientation Of Quartz Grains In Unconsolidated Beach Sands Of San Luis Obispo County, California, David V. Pearson

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to determine the orientation of quartz grains in unconsolidated beach sands, and if possible, to determine some of the physical factors involved in producing the orientation found.

An Investigation Of The Effect Of Feedback On Amplifier Figure Of Merit, John L. Crone

Electrical and Computer Engineering ETDs

It was the purpose of this investigation to determine the effect of feedback on the figure of merit of (1) the resistance coupled amplifier; (2) the shunt peaked amplifier; and (3) the single tuned amplifier.

An Experimental Method Of Predicting Strength Variations In Portland Cement, James H. Sprouse Jr.

Civil Engineering ETDs

It was the purpose of this study (1) to show the variations that may be expected in the strength characteristics of different shipments of Portland cement of the same brand from the same cement mill; (2) to show the variations in the strength characteristics of different brands of cement; and (3) to develop an accelerated strength test for Portland cement upon which the strength of the concrete made from the cement could be predicted.

Polarographic Determination Of Germanium, Calvin Leo Stevenson

Bachelors Theses and Reports, 1928 - 1970

In the past germanium has been determined by either wet methods or by the spectograph; the spectograph being used for the determination of very small amounts of ger­manium and wet methods used when more than one hundredth of one percent germanium is present. Both of these analyti­cal schemes have weaknesses.

Fluorite Deposits In The Dry Creek District, Near Superior, Mineral County, Montana, Russell M. Corn

Bachelors Theses and Reports, 1928 - 1970

Fluorite was discovered in the. Dry Creek District, Mineral County, in 1943 and the first commercial prod­uction of this mineral in Montana waS recorded from this locality.

Concentration Of Tungsten Ore From The Potosi Mining District, Ted S. Jordan

Bachelors Theses and Reports, 1928 - 1970

Tungsten is a strategic metal which, at present, is in short supply in the United States. In addition to its need in the defense effort, tungsten is becoming more and more in industrial demand and, as an increasing number of uses for this element are being found, so must additional sources of it be discovered and processed.

The Decomposition Of Calcium Tungstate And Synthetic Scheelite With Hydrochloric Acid, Robert R. Beebe

Bachelors Theses and Reports, 1928 - 1970

The decomposition of scheelite with hydrochloric acid was studied under conditions of variable acid concentration, time and temperature. The reactions were traced by weigh­ing material untransformed and, in some cases, by analyzing the transformation products.

The Indium-Mercury Constitutional Diagram, Bert E. Lake

Bachelors Theses and Reports, 1928 - 1970

Whenever metals differ greatly in electropositivity, intermetallic compounds are likely to form in preference to solid solutions. 21ercury and indium show a considerable difference in electropositivity. This would indicate that intermetallic compounds may play an important role in the con­stitutional diagram for the mercury-indium system.

The Effect Of Germanium On The Current Efficiency In The Electrolysis Of Pure Zinc Sulfate Solution, Keith R. Bock

Bachelors Theses and Reports, 1928 - 1970

It has long been recognized that electrolytic zinc cells are extremely sensitive to impurities. In fact, cer­tain impurities present in amounts as low as 0.1 mg/1 cause a serious loss of current efficiency. Also, the presence of several impurities in the electrolyte may accelerate the detrimental effect of each impurity.

Metal Dust Production, James H. Foreman

Bachelors Theses and Reports, 1928 - 1970

The object of this thesis is to study the production of metal dust by direct application of a mechanical force to a stream of molten metal.

Recrystallization Of High Purity Aluminum, Virgil H. Griswold Jr.

Bachelors Theses and Reports, 1928 - 1970

If a metal is first cold-worked and then heated to a sufficient temperature for an adequate length of time, the hardening properties due to cold-working disappear, and the metal will return more or less to its original state. Upon examination of the microstructure, we find that new grains have replaced the old grains through what is called recrystallization. The final size of the recrystallized grains depends upon three important variables--the degree of cold-work or deforma­tion, annealing temperature, and annealing time.

A Study Of The Effects Of The Chloride Ion On The Lead-Silver Anodes And On The Lead Tenor Of The Zinc Deposit In Zinc Electrolysis, William A. Mitchell

Bachelors Theses and Reports, 1928 - 1970

The electrolyte used in the commercial production of electrolytic zinc from zinc sulphate solutions contains small amounts of impurities each of which has its own effects upon the process. Impurities such as antimony, cobalt, nickel, and iron tend to lower the current efficiency while other impurities such as chlorine, fluorine, and nitrates tend to increase the corrosion of the lead anodes and thereby increase the lead tenor of the zinc deposit.

The Precipitation Of Calcium Tungstate From Sodium Tungstate Solution, Martin E. Messner

Bachelors Theses and Reports, 1928 - 1970

In view of the great need for tungsten in the present industrial world it is necessary that all known tungsten sourves be utilized to the greatest possible extent. Scheelite ores promise to be an increasingly important source of tungsten, inasmuch as the discovery of vast new deposits has been made and known deposits of high grade ores have practically been depleted.

The Effect Of Manganese On The Age Hardening Of Aluminum-Copper Alloys, Keith P. Burgess

Bachelors Theses and Reports, 1928 - 1970

It is known that age-hardening occurs in alloys of the solid solution type containing a hardening constituent, of a metal or metallic compound which is more soluble in the solvent phase at higher tempertures than at lower temperatures.

A Study Of The Beneficiation Of Low-Grade Domestic Chromite, Darrell Edward Bodie

Bachelors Theses and Reports, 1928 - 1970

Chromite, a strategic mineral, is being consumed in ever increasing quantities in the United States today. Although the United States imports practically all of the chromite that is being consumed, it is gradually becoming necessary to exploit the low-grade deposits that are located within the United States, and also the low-grade deposits of Canada.

A Petrographic Analysis Of The Basal Member Of The Kootenai Formation, Frank E. Coupal

Bachelors Theses and Reports, 1928 - 1970

The basal member of the Kootenai formation in south­western Montana is typically a fine to medium-grained "salt and pepper" sandstone and chert-pebble conglomerate. The section between Delpine, Montana, and Melrose, Montana, generally thickens and markedly coarsens to the West.

The Benefication Of A Low-Grade, Montana Scheelite Ore, Walter G. Parker

Bachelors Theses and Reports, 1928 - 1970

The increasing importance of tungsten as an industrial metal and the recent discoveries of extensive deposits of low-grade tungsten ores in Montana led to the investigation which is reported in this paper. The purpose of this investigation was to determine if a saleable concentrate could be obtained from one of these low-grade, Montana scheelite ores.

Consumptive Use Of Water By Major Farm Crops In The Milford District Of Utah, Glen H. Calder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Irrigation water supplies in the arid West have become limited, yet the area of irrigable land is still extensive. To realize the more efficient use of the available supply, or for planning new irrigation projects, studies are needed to determine how much water is consumptively used by farm crops and native vegetation.