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An Investigation Of Broadband Current Preamplification For Obtaining Simultaneous High-Resolution Energy And Time Information From Nuclear Radiation Detectors, Joe Kenneth Millard

Doctoral Dissertations

In beginning the investigation of low noise current preamplification, noise-performance limitations of existing broadband current-amplifying stages are considered. Dominant noise sources of the general, shuntfeedback amplifier stage having both bipolar and field-effect transistor input devices are discussed. This discussion includes the reasons why optimum noise performance from this amplifier stage requires unavoidable signal integration. The integrating shunt-feedback configuration is commonly known as the charge-sensitive preamplifier. Criteria are developed for differentiating the output voltage pulse of the charge-sensitive preamplifier without degrading the signal-to-noise ratio. Subsequently, a new broadband, shunt-feedback amplifier is described having a current gain equal to the ratio of …

Application Of Positive Feedback Techniques To Charge-Sensitive Preamplifiers, Willaim Pinkston Albritton Jr.

Doctoral Dissertations

The application of positive feedback techniques to charge-sensitive preamplifiers for the purpose of improving their performance characteristics and versatility is considered. Improvements in sensitivity of charge gain in input capacitance, preamplifier output pulse rise-time, and ability to terminate long input cables are discussed. In each case, theoretical developments are carried out in order to determine the optimum positive feedback conditions. A practical charge-sensitive preamplifier design is discussed and the effects of applying positive feedback are delineated.

For the experimental preamplifier, the application of positive feedback resulted in a reduction in charge gain sensitivity to input capacitance changes of almost an …

Rotating Cylinder Apparatus For Rarefied Gas Flow Studies, Darryl J. Alofs, George S. Springer

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A Rotating Cylinder Type Apparatus is Described, Suitable for Determining Drag in Cylindrical Couette Flow of Rarefied Gases, and for Evaluating Tangential Momentum Accommodation Coefficients at Gas-Solid Boundaries. the Apparatus is Equipped with a Damping Device using Diffusion Pump Oil for Eliminating Undesirable Oscillations in the System. Tangential Momentum Accommodation Coefficients of Argon on Aluminum Were Determined with an Accuracy of ±2.5%. the Results Obtained Indicate that the Apparatus May Be Used over a Wide Pressure Range, Corresponding to Free Molecule and Continuum Flow Conditions. © 1970 the American Institute of Physics.

Evaluation Of Cored Specimens From Timber Caisson Beneath Pier No. 2 Of The Us 25 Bridge Over The Ohio River Between Covington And Cincinnati, James H. Havens, Assaf S. Rahal

Kentucky Transportation Center Research Report

Pier No. 2 of the former C&O Bridge at Covington is off-shore from the Kentucky side of the Ohio River. It was built in 1887. In 1927, this pier was extended downstream to support a new railroad bridge. The other three piers remained independent. The original structure was then converted to highway use and was purchased by the Commonwealth of Kentucky in 1937. In 1968, an engineering analysis of the superstructure indicated critical deficiencies in terms of "safety factors", and the bridge was closed to all traffic. Subsequently, various plans for reconstruction came under consideration. Of greatest significance here is …

Local Planning Agency Relationships With Councils Of Governments And Development Districts: A General Investigation With A Specific Emphasis On Chattanooga, Tennessee, John Mayes

Masters Theses

The federal government, in an attempt to bring about metropolitan wide problem solving and to foster economic development on a regional scale, has encouraged the establishment of metropolitan councils of governments and economic development districts. These have been given a planning function, financially supported by the federal government. This thesis is a study of how these new planning agencies relate with other planning agencies in areas where their jurisdictions overlap.

This is done in a genera investigation of how the Chattanooga Area Regional Council of Governments and the Southeast Tennessee Development District relate to the local planning agency (the Chattanooga-Hamilton …

Transient Response Of Linear Elastic Structures Determined By The Matrix Exponential Method, William Christopher Terrill Stoddart

Masters Theses

This investigation was undertaken to develop a numerical solution for the transient response of linear, elastic structures based on the matrix exponential solution for first order, linear, constant coefficient differential equations. The investigation was prompted by the need for an economical technique that can be used to analyze multidegree of freedom systems exemplified by piping and structural components associated with nuclear power plants.

A mathematical model characterizing the behavior of linear, elastic structures was developed by using state variables of displacement and velocity. The structure consists of beam elements of uniformly distributed mass, weightless springs, and rigid masses. The stiffness …

Statistical Quality Control Of Highway Construction And Materials, J. B. Venable

Kentucky Transportation Center Research Report

The objective of this report is to review existing local practices used in establishing and enforcing highway specifications and construction processes and to compare these practices. With procedures based on statistical quality control concepts. In order that statistical quality control concepts may be properly used where applicable, the first part of this report considers the general theory underlying the use of statistical control methods and the development of different types. Of acceptance plans which may be used in the highway construction industry. The second portion of the report is concerned with analyzing and comparing Kentucky's current specification requirements with typical …

Continuously Reinforced Concrete Pavement, James H. Havens

Kentucky Transportation Center Research Report

A sampling-type crack survey was made in July 1969; 200 feet in each 1000 feet were sampled. The average interval between cracks was 5.78 feet. Paving was completed in late 1968. The average crack interval in July 1970 was 4.14 feet. The 1970 survey was also a sampling type.

It is apparent that cracking approached maturity or equilibrium during the first year. Apparently, too, most of the cracking occurred during the first few weeks after construction – which suggests curing shrinkage as a contributory cause. A discussion of the significance of time and temperature will follow the presentation of other …

Diffusion In Wide Grain Boundaries, J. Mimkes, Manfred Wuttig

Materials Science and Engineering Faculty Research & Creative Works

The rigorous solution of the grain-boundary diffusion problem has been approximated by a series expansion method. The calculations show that higher-order terms may be neglected in the bulk adjacent to the grain boundary. Thus, in this region Whipple's and Suzuoka's solutions represent a close approximation to the problem. Inside the grain boundary, however, higher-order approximations have to be taken into account. These approximations gain importance in the case of wide grain boundaries. The solutions obtained for an instantaneous source have been fitted to available grain-boundary diffusion data of Ni2+ in MgO at 1200°C. Numerical calculations give for the bulk diffusion …

Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

Basic Instrumentation Of A Three-Zone Convection Coater Dryer For Calculation Of Heat And Mass Balances, Byron H. Mckinstry

Masters Theses

No abstract provided.

Relationship Between Soil Support Value And Kentucky Cbr, Tommy C. Hopkins

Kentucky Transportation Center Research Report

Three slightly different correlations between Kentucky CBR's and the AASHO Road Test soil support values were developed. The first relationship was made by assuming a logarithmic scale between Kentucky CBR's of 5.2 and 100, which corresponded to values on the soil support scale of 3 and 10, respectively. The Kentucky CBR of 5.2 was determined by performing tests on the AASHO road subgrade soils. For practical purposes, the AASHO Road Test crushed stone base material was assumed to be a "100 percent CBR material" (this assumption was based on CBR data previously reported by Shook and Fang). The second correlation …

Manpower And Apprentice Training Program, B. B. Myers

Kentucky's Annual Forum on Transportation

No abstract provided.

Pollution Control For Quarry Operations, J. W. Render

Kentucky's Annual Forum on Transportation

No abstract provided.

Pollution Control Anti-Pollution Construction, C. W. Sigler

Kentucky's Annual Forum on Transportation

No abstract provided.

Anti-Pollution Design, E. B. Gaither Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

Status Of The Five Year Highway Program, J. R. Harbison

Kentucky's Annual Forum on Transportation

No abstract provided.

Professionalism - The Challenge Of The 70'S, Sammie F. Lee

Kentucky's Annual Forum on Transportation

No abstract provided.

Concrete Slip-Form Paving For Secondary Roads, George D. Timm

Kentucky's Annual Forum on Transportation

No abstract provided.

Maintenance Management, John D. Witt, B. H. Banks

Kentucky's Annual Forum on Transportation

No abstract provided.

Roadside Safety, John A. Deacon

Kentucky's Annual Forum on Transportation

No abstract provided.

Maintenance Levels: What, Why, Where And How, Adrian G. Clary

Kentucky's Annual Forum on Transportation

No abstract provided.

Subaqueous Interstate Highway Tunnel Design And Construction, Earl F. Cecil

Kentucky's Annual Forum on Transportation

No abstract provided.

Quality Control In Structural Fabrication, C. F. Jarrard Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

The "Topics" Program, H. Milton Heywood

Kentucky's Annual Forum on Transportation

No abstract provided.

Utilities-Highway Location, N. W. Coomes

Kentucky's Annual Forum on Transportation

No abstract provided.

Remarks By John M. Branham, John M. Branham

Kentucky's Annual Forum on Transportation

No abstract provided.

Remarks By Bill E. King, Bill E. King

Kentucky's Annual Forum on Transportation

No abstract provided.

What Lies Ahead For The Highway Program?, Ralph R. Bartelsmeyer

Kentucky's Annual Forum on Transportation

No abstract provided.

Working Toward A Clean Air Environment For Kentucky, Frank P. Partee

Kentucky's Annual Forum on Transportation

No abstract provided.