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Traps And Trap Distribution In Commercial Zinc Sulphides Phosphors Silver Activated And Poisoned With Cobalt, Zohra Safinaz El Calamawy

Archived Theses and Dissertations

No abstract provided.

Non-Linear Analysis Of Electrocardiogram Tracings In Detection Of Occult Coronary Artery Disease, Joseph Robert Levitt

Dissertations

The general problem of identifying significant characteristics of a system by analyzing the properties of a signal emitted by that system is common to many disciplines, biological as well as physical. In general, achievement of a satisfactory solution depends on the capability of assigning membership of candidate signals to one of a number of mutually exclusive categories:

In this study, a new technique of processing the standard electrocardiograms from human subjects has been developed. This technique employs a set of non-linear transformations which enable the assignment of electrocardiograms into one of two Mutually exclusive categories. The first category is that …

Electronic Analog Computer Hydrologic Simulation Of The Upper Bear River Basin, Mohammed A. Basha

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

OF the total precipitation falling on watersheds throughout the world, an average of approximately 85 percent returns directly to the atmosphere through evaporation and use by mountain vegetation. The remaining 15 percent moves from the watersheds as runoff and becomes available in the valleys to be used by man for irrigation, industry, recreation, and many other requirements in recent years has led to an increasing need for efficient management of available water resources, and in this regard computer modeling or simulation has proved to be a powerful tool.

The study described herein involves simulation of the hydrologic system of the …

Irrigation Water Management Potential In The Bear River Delta, Tom Al Austin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purposes of this study were to evaluate the present irrigation efficiencies of the Bear River delta area of northern Utah and to propose a set of management proposals to improve the irrigation efficiency. In order to evaluate the present use, all pertinent data on the water resources of the Bear River delta had to be assembled and analyzed.

A hydrologic budget is a method used to account for all inflows, outflows, and changes in storage within a given area. In this study, all inflows and changes in storage were evaluated and the outflow was predicted. In this manner the …

Estimating The Rainfall-Runoff Characteristics Of Selected Small Utah Watersheds, Clive H. Walker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Runoff and rainfall data have been taken from three high mountain Utah watersheds and subjected to runoff to rainfall comparisons. The resulting Q/P ratios have been compared to the average volumes of runoff curve numbers (CN) computed from this data for each watershed. Runoff curve numbers were also estimated on the basis of the soils and vegetation data available for the watersheds.

An attempt has been made to estimate the watershed lag characteristics by computing synthetic hydrographs for successively larger values of time to peak estimates until the best fit comparison was achieved between the snythetic and the actual hydrographs. …

A Study Of The Secant Law For Sporadic E, Ruey-Yuan Han

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The secant law is the relationship between the frequencies of a vertically incident wave and an obliquely incident wave that are reflected from the same level (i.e., density) of a stratified ionosphere. This thesis investigates the validity of the secant law applied to sporadic E.

Sporadic E data from two backscatter sounders and one vertical incidence ionosonde located in Japan were studied to test the validity of the secant law. The B-scan photos of the backscatter sounders were searched for E_s patches which were then compared with the sporadic E parameters defined for vertical incidence ionograms.

Finally, two theoretical …

A Study Of Flooded And Rain Infiltration Relations With Surface Ponding, Yehia Z. El-Shafei

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The non-linear partial differential equation (combination of Darcy's law and continuity equation) has been used in this investigation to predict the flooded infiltration through soils possessing appreciable amount of clay and initially drier than its field capacity. One of the most important assumptions made in solving the differential equation is that the capillary conductivity-moisture content relationship is unique for each initial moisture content computation due to the different reaction of clay minerals with different initial moisture contents.

Mathematical equations were also derived to predict:

1. The rate of the wetting front advance, prior to the occurrence of surface ponding, taking into …

A Study Of An Unintentional Shutdown (Scram) Problem In The Operation Of The High Flux Isotope Reactor, Cheng Ping Wu

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory experiences occasional operating difficulties caused by temporary low voltage conditions on its main power feeder line. The low voltage causes the shutdown of one or more of the three primary coolant pumps. When two of these pumps are shut down, the capacity of the cooling system is reduced to the point where the reactor is scrammed due to a high inlet coolant temperature.

This study was made to determine the cause of the high inlet temperature when operating with one primary coolant pump and to suggest possible changes …

A Study Of The Reduction Of Nickel Oxide Single Crystal By Hydrogen In A High Vacuum System., Jong In Joung

Chemical and Biological Engineering ETDs

Wafers of well-characterized nickel oxide single crystal, with (110) faces, were etched in hydrochloric acid and reduced by hydrogen in a high vacuum system. Reduction took place at temperatures of 280-310°C and pressures of 1.0-1.3 torr. The reduced wafers were replicated by carbon film and the replicas were examined by an electron microscope.

A series of reduction patterns at various stages of surface change were obtained. After a period of incubation, hemispherical metallic nickel particles, about 400 A in diameter, appeared on the parent nickel oxide surface. The number of hemispheres increased but the size of the hemispheres did not …

Median Design And Accident Histories, Gordon R. Garner

Kentucky Transportation Center Research Report

The purpose of this study was to provide information concerning the accident histories of various median types to verify minimum requirements for width and cross section. Previous accident studies failed to disclose significant relationships between median width and accident rates. Those studies did not recognize or control several important variables that were controlled in the present study. The efforts here are to compare median types on rural, four-lane, fully controlled access facilities with similar geometries other than median types. An attempt was made to account for some of the Variability in the accident data. Thus, this study gives information on …

Legal Aspects And Guidelines Pertaining To Drainage Of Surface Waters, D. W. Mclellan Jr., Victor Fox

Kentucky Transportation Center Research Report

A previous study ("Research Relating to State Highway Laws", reported January 1967) afforded us an opportunity to review a vast array of literature and statutory law pertaining to enabling legislation and administrative authority to construct and maintain highways. It was surprising to find that the statutes are void of guidance on certain subjects: there are great "bodies" of unwritten or non-statutory laws which are referred to as "common law" and "civil law", which are deeply rooted in the past; many are doctrinal or equitable; many are extraordinary and argumentative -- they should not be confused with Civil Procedure. They have …

A Study Of Air Cleaners And The Effect Of Air Cleaner Design On Horsepower, Roger D. Mcculley

Graduate Research Papers

It is the purpose of this study to investigate air cleaners and the effect of air cleaner housing design, intake snorkel tube design and filter media on engine horsepower. In doing the investigation, the writer will determine how horsepower is affected by: (1) the size and shape of the intake snorkel, (2) the placement of the intake snorkel in the engine compartment, (3) the size (volume) of the air cleaner housing, (4) the type of filtering media used, (5) the size of the filter element, (6) breather holes drilled in the filter housing, and (7) a partially clogged filter element.

Field Manual Fm 55-8, Transportation Intelligence, 12 March 1970, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

Obviously, reliable information about potential enemy transportation equipment, facilities, systems, capabilities is vital, since our forces may need to prevent an enemy from using them and we may need to use them. Transportation or mobility intelligence is such reliable information. This is a very thorough document describing the collection, production, and dissemination of transportation intelligence. The emphasis of this manual is collection of relevant information in the field.

The manual describes organizations and personnel in the army responsible for collecting transportation related information. It identifies the national-level military intelligence production agencies as:

(a) The Defense Intelligence Agency (DIA) which was …

Hydrologic Inventory Of The Uintah Study Unit, Lloyd H. Austin, Gaylord V. Skogerboe

Reports

The 1963 Utah State Legislature authorized the Utah Water and Power Board (now the Utah Division of Water Resources) to develop a state water plan in order to give coordination and direction to the activities of all state and federal agencies concerned with Utah's water resources. To facilitate the development of this plan, a proposal was submitted through the State Planning Coordinator in the Governor's Office to the Urban Renewal Administration of the Housing and Home Finance Agency. Funding was approved effective May 19, 1966, under the Urban Planning Assistance Program authorized by Section 701 of the Housing Act of …

Closed Conduit To Open Channel Usu Stilling Basin, Gordon H. Flammer, Gaylord V. Skogerboe, Chi-Yuan Wei, Hameed Rasheed

Reports

Criterion have been developed for designing a stilling basin to serve as a transition from closed conduit flow to open channel flow for a fully submerged pipe outlet. The unique feature of the stilling basin is the short-pipe energy dissipater so located and designed as to provide maximum energy dissipation for the basin configuration. The expanding characteristics of a submerged jet were used in establishing the length of the stilling basin. The unsteadiness of the water surface and the relative boil height in the model basin were used as the criteria for evaluating the effectiveness of the structure for energy …

Pavement Slipperiness Studies, James L. Burchett Jr., Ronalds L. Rizenbergs

Kentucky Transportation Center Research Report

Studies of pavement skid resistance in Kentucky have been in progress since 1956. In 1964, an extensive investigation into the use of an automobile as a testing tool was undertaken and an interim standard method of test was selected. Since then, investigations with the device have continued, both to facilitate meaningful interpretation of skid-test data and to evaluate the skid resistance performance of pavement surfaces.

Variables associated with the testing device, procedures and pavement surfaces were investigated. Several paving projects were tested to determine the number of sites required to obtain a representative result. It was found that on most …

Freeze-And-Thaw Phenomena In Concretes And Aggregates, James H. Havens

Kentucky Transportation Center Research Report

This report summarizes several years of research relating to damage to concrete and aggregates undergoing freezing and thawing. Basic principles involving freezing and attendant pressures are considered. Application of these principles to the evaluation of concrete was accomplished in experiments on concrete having low and high air contents. The effects of air entrainment upon freeze-thaw resistance were demonstrated.

Freeze-thaw characteristics of saturated aggregates relative to their physical properties such as porosity, absorption and bulk specific gravity were studied by submerging individual particles in pre-chilled mercury. Pressures associated with popouts in concrete were monitored and are presented along with accompanying theoretical …

An Investigation Of Low-Strength Concrete And Resulting Structural Failure In A Bridge Deck, James H. Havens

Kentucky Transportation Center Research Report

This investigation concerns the discovery of weak concrete in a portion of the deck of the Elkhorn City bridge, APD 640(4), within a year after it was opened to traffic. The deck concrete was placed between April 14 and June 14, 1968. The bridge serves heavy coal-trucks traffic. Failures occurred in the eastern-most span (No. 5) in April or May of 1969, Undoubtedly, the heavy loading contributed to early disclosure of defective concrete.

A preliminary investigation was made in May 1969, and reported by memorandum May 21, 1969. The bottom third or half of concrete in the affected portion, Span …

Locating And Tracing Seepage Water In Unstable Slopes, Yasin A. Alkhoja, Gordon D. Scott

Kentucky Transportation Center Research Report

With the increase in modern highway construction, the occurrence of landslides has been growing proportionally due to the use of deeper cuts and higher fills. It has been observed that landslides on highways often occur in fills on hillsides. Accumulation of water in the embankment, usually seeping from a nearby hill, may reduce the shear strength of the embankment soil and result in failure at a later time. Many landslides on Kentucky highways have occurred a few years after construction and obviously have been caused by the gradual weakening of the embankment due to a damming and accumulation of water. …

Slip-Form Paving, Kerry P. Magan

Kentucky Transportation Center Research Report

The proper placement, consolidation, and finishing of low-slump concrete without the aid of pre-erected side, forms has been widely acclaimed as an economical and effective procedure in the construction of portland cement concrete pavements. This construction procedure, commonly referred to as slip-form paving, depends upon the ability of low-slump concrete to remain in place after consolidation and removal of forms.

Slip-form pavers differ from conventional pavers in that no fixed side forms are required inasmuch as the slip-form paver has side forms that advance with the machine. Concrete is merely deposited on the prepared subgrade in front of the machine, …

Final Performance Report On Experimental Use Of Thermoplastic Pavement-Striping Materials, Assaf S. Rahal, Ronald D. Hughes

Kentucky Transportation Center Research Report

This study was undertaken in order to: 1) evaluate the performance of thermoplastic striping materials, 2) compare their performance on both portland cement concrete and bituminous concrete pavements to that of conventional traffic paints, and 3) to evaluate the economics of thermoplastics in terms of cost per mile per day of useful life. The performance of two brands of thermoplastic striping materials and conventional traffic paints applied at nine test sites in both rural and urban areas is reported herein. Application procedures, site locations, repair histories and materials specifications are included. Accumulative costs for each material at all sites for …

Slurry Seal Maintenance Applications, Robert L. Florence, Herbert F. Southgate

Kentucky Transportation Center Research Report

A slurry seal mixture consists of graded fine aggregate (normally minus 3/8-inch material), mixing grade emulsified asphalt (SS-1 or SS-lH), and water. The water is added to aid in mixing and to provide a free-flowing consistency so that the mixture can be spread in thin layers on the surface of an existing pavement. After the mixture is spread, the water evaporates and the remaining material, aggregate and base asphalt, forms a thin seal on the pavement surface which resembles a fine-grained asphaltic-concrete surface. As a result of the free-flowing consistency and the fineness of the aggregate, a slurry mixture readily …

Interior Corrosion Of Structural Steel Closed Sections, American Iron And Steel Institute

CCFSS Library (1939 - present)

A survey of light poles, water-tank stanchions, orthotropic deck bridges, marine tubular catwalks, davits and welded steel columns strongly suggests, contrary to some beliefs, that interior surfaces of closed steel sections rust but little in the atmosphere, even when not fully sealed. Only light rusting occurs because amounts of oxy'gen and water in entrapped air are limited and condensation necessary for rusting is infrequent. Computations based on the oxidation reaction taking into account inside surface, volume of entrapped air, relative humidity and air changes show that the loss of iron thickness due to such rusting is negligible. Use of closed …

A History Of Maine Roads 1600 - 1970, State Highway Comission

Maine Collection

A History of Maine Roads 1600 - 1970.

State Highway Commission, Augusta, Maine, 1970.

Sections: Two Transportation Firsts, Early Roads, The Stagecoach Arrives, Steamboats and Railroads, Better Roads Movement, The Automobile, State Roads, First Highway Commissioner, State Highway Department, State Highway Commission, Patrol Maintenance, Bridge Law, Federal Aid, Highway Finances, World War 1, First Route Markers, Traffic Counts, Snow and Ice Control, Planning Activities, World War 2, The Maine Turnpike, Right of Way, Division Offices, Chairman Full-Time Position, Engineering Tools and Techniques, Engineering Pioneers, The Interstate Program, Roadside Beauty, Highway Safety, Operation of the Department Today.

The Proposed Eastern Nebraska International Airport Plan, George T. C. Peng, Joseph H. Bain

Nebraskiana Publications: Resources and Materials on the 37th State

Excerpt from the prologue:

Passenger growth has led to expansion of facilities at both the Omaha and Lincoln airports; but like many others in the nation, they are rapidly becoming congested. The Federal Aviation Administration, the State Government officials, and many civic leaders in Nebraska are now becoming aware of the need for establishing a regional airport for the Eastern Nebraska region in order to promote and handle international air transportation for the future. People are also beginning to think of such a modern airport as an essential factor in bringing new industries to Nebraska and in shaping the urbanization …

Linear Regression Models Of Sound Velocity In The North Atlantic Ocean Below A Critical Depth, Richard Roland Kunkel

Doctoral Dissertations

"Sound velocity models currently in use by the U. S. Navy require difficult data sampling at great expense. This study is to investigate the feasibility of a sound velocity model dependent only upon position that would be valid for a selected, reasonably large, near homogeneous area of the ocean. The most important position parameters are latitude, longitude, and depth. To accomplish this objective a critical depth of 2500 meters was established for an 8° by 20° rectangle of the Sargasso Sea which lies within the North Atlantic Ocean. The critical depth is defined as the depth at which the characteristics …

Developing A Hydro-Quality Simulation Model, Neal P. Dixon, David W. Hendricks, A. Leon Huber, Jay M. Bagley

Reports

No abstract provided.

Water Management Research In Arid And Sub-Humid Lands Of The Less Developed Countries: Second Annual Progress Report, Utah Water Research Laboratory

Reports

No abstract provided.

Subcritical Flow At Open Channel Structures Bridge Constructions, Gaylord V. Skogerboe, Lloyd H. Austin, Kuan-Tao Chang

Reports

The techniques previously employed by the writers for describing subcritical flow at open channel constrictions have been found valid for analyzing nonuniform flow in open channels. Combining the nonuniform flow analysis with the submerged flow ratings for various bridge geometrics has provided an analytical means for determining the backwater due to the bridge constrictions under “abnormal stage – discharge” conditions.

A Hydrologic Model Of The Bear River Basin, Robert W. Hill, Eugene K. Israelsen, A. Leon Huber, J. Paul Riley

Reports

As demands upon available water supplies increase, there is an accompanying increase in the need to assess downstream consequences resulting from changes at specific locations within a hydrologic system. The problem is approached in this study by hybrid computer simulation of the hydrologic system. Modeling concepts are based upon the development of basic relationships which describe the various hydrologic processes. Within a system these relationships are linked by the continuity-of-mass priciple which requires a hydrologic balance at all points. Spatial resolution is achieved by considering the modeled areas as a series of subbasins. The time increment adopted for the model …