Digital Commons Network^™

Campaign Of Sabotage: Big Government's War Against Public Transportation, Michael Lewyn

Scholarly Works

Historically, American politicians have been far more generous to highways than to public transit. The political elite's failure to support public transit is based on the view that despite decades of state and federal support, transit ridership has dwindled. This article criticizes that theory, by explaining that far from promoting public transit, government at all levels has sabotaged transit in a variety of ways: by building highways to suburbs unserved by public transit, by loading down transit systems with unfunded mandates, by using housing, education and tax policy to encourage migration to those suburbs, and by using zoning policy to …

Modeling And Fabrication Of Lightweight, Deformable Mirrors Subjected To Discrete Loading, Michael E. Roche

University of Kentucky Master's Theses

The push towards larger diameter space telescope mirrors has caused the space industry to look at lightweight, deformable alternatives to the traditional monolithic mirror. One possible solution to the dilemma is to use the piezoelectric properties of certain materials to create a lightweight, deformable mirror. Current piezoelectric deformable mirror designs use individual actuators, creating an immensely complex system as the mirrors increase in size. The objective of this thesis is to aid in the design and development of lightweight, deformable mirrors for use in space based telescopes. Two topics are considered to aid this development. A doubly curved, lightweight, bimorph …

Risk Based Urban Watershed Management Under Conflicting Objectives, Vladimir Novotny, David E. Clark, Robert J. Griffin, Douglas Booth

Economics Faculty Research and Publications

Ecological impairment and flooding caused by urbanization can be expressed numerically by calculating the risks throughout the watershed (floodplain) and along the main stems of the streams. The risks can be evaluated in terms of the present and/or future. This article describes the methodologies for ascertaining the risks in the Geographical Information Systems (GIS) environment. The objectives of urban flood controls and ecological preservation/restoration of urban waters are often conflicting and, in the past, the sole emphasis on flood control led to destruction of habitat and deterioration of water quality. An optimal solution to these two problems may be achieved …

Hard Water: Politics And Water Supply In Milwaukee, 1870-1995, Kate Foss-Mollan

Purdue University Press Books

Hard Water: Politics And Water Supply In Milwaukee, 1870-1995 by educator and urban studies specialist Kate Foss-Mollan is the documented and historical account of the water supply of Milwaukee, Wisconsin. Foss-Mollan blends urban history, technology, biology, research, and political science into a remarkably intriguing and informative saga. From conflicts over supplying poor neighborhoods to partisan debates regarding the necessity of a filtration plant, Hard Water spans over a century with an eye-opening account of the wrangling, machinations, and more all about a seemingly simple drink of water. Very highly recommended for American urban studies reading lists.

Porosity, Percolation Thresholds, And Water Retention Behavior Of Random Fractal Porous Media, Michael C. Sukop

University of Kentucky Doctoral Dissertations

Fractals are a relatively recent development in mathematics that show promise as a foundation for models of complex systems like natural porous media. One important issue that has not been thoroughly explored is the affect of different algorithms commonly used to generate random fractal porous media on their properties and processes within them. The heterogeneous method can lead to large, uncontrolled variations in porosity. It is proposed that use of the homogeneous algorithm might lead to more reproducible applications. Computer codes that will make it easier for researchers to experiment with fractal models are provided. In Chapter 2, the application …

Implementation Costs Of Kentucky's Erosion Control Best Management Practices For Skid Trails, Bennett Scott Shouse

University of Kentucky Master's Theses

This paper describes a study designed to determine average labor and machine times required to implement erosion control and revegetation best management practices (BMPs) for skid trails in Kentucky. Labor and machine activities were recorded for 14,400 feet of skid trail on 10 nonindustrial private logging sites. Water bar construction and reshaping activities such as filling ruts and berm removal were filmed continuously with a video camera and then analyzed using time-motion study techniques. Labor activities for revegetation such as seeding and application of fertilizer were also timed. The average total machine time for retirement activities per 1000 feet was …

Finite Memory Policies For Partially Observable Markov Decision Proesses, Christopher Lusena

University of Kentucky Doctoral Dissertations

This dissertation makes contributions to areas of research on planning with POMDPs: complexity theoretic results and heuristic techniques. The most important contributions are probably the complexity of approximating the optimal history-dependent finite-horizon policy for a POMDP, and the idea of heuristic search over the space of FFTs.

The Sex Discrimination Argument In Gay Rights Cases, Nan D. Hunter

Georgetown Law Faculty Publications and Other Works

The argument that laws that discriminate on the basis of sexual orientation in fact discriminate on the basis of sex is not new. Advocates have been pressing this claim for almost thirty years. Simply put, the argument is that a statute that bars a sexual relationship between two women or two men discriminates on the basis of sex because either partner could have had the same relationship with a person of the opposite sex.

Automatic Image To Model Alignment For Photo-Realistic Urban Model Reconstruction, Mike Partington

University of Kentucky Master's Theses

We introduce a hybrid approach in which images of an urban scene are automatically alignedwith a base geometry of the scene to determine model-relative external camera parameters. Thealgorithm takes as input a model of the scene and images with approximate external cameraparameters and aligns the images to the model by extracting the facades from the images andaligning the facades with the model by minimizing over a multivariate objective function. Theresulting image-pose pairs can be used to render photo-realistic views of the model via texturemapping.Several natural extensions to the base hybrid reconstruction technique are also introduced. Theseextensions, which include vanishing point …

Shadow Generation Based On Re Loops And Their Angular Representations, Khageshwar Thakur

University of Kentucky Master's Theses

The initial attempt was to find efficient technique to identify shadow plylgons in the shadow-volume based shadow generation algorithm. It was observed that shadows correspond to loops of ridge edges (REs). By identifying all the non-overlapping RE loops of a 3D object, one finds all the shadow polygons and, consequently, all the shadows it generates on other objects as well as shadows it generates on itself. This, however, requires extensive edge-edge intersection tests.It was subsequently realized that by storing the angular representations of the RE looks in a look up table, one can avoid the need of decomposing RE loops …

Piv Measurements Of Channel Flow With Multiple Rib Arrangements, Harald Roclawski

University of Kentucky Master's Theses

A model of a gas turbine blade cooling channel equipped with turbulators and a backward facing step geometry was examined. Up to four turbulators oriented cross-stream and inclined 45° to the flow direction were mounted in the channel. The blockage ratio b/H of the turbulators and the height h/H of the backward facing step was 0:125 and 0:14 respectively. The number of turbulators as well as their size was varied. In a preliminary investigation, hot-wire and pressure measurements were taken for three different Reynolds numbers (5,000, 12,000, 18,000)in the center plane of the test section. Subsequently, particle image …

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Magnetoresistance Measurements On Electrodeposited Co_X Cu_{1-X} Alloy Films, Ömer F. Bakkaloğlu, İsmai̇l H. Karahan

Turkish Journal of Physics

Co_x Cu_{1-x} alloy films were prepared by using electrodeposition technique. The variations of Co and Cu contents of the films were investigated as functions of bath pH and Co content. The compositions of the alloy films were determined using an atomic absorption spectrophotometer. The crystal structures of the alloy films were analyzed using a Cu (K \alpha )-X-ray diffractometer. The diffraction lines observed were only those of copper component in the alloy films. All three films showed negative magnetoresistance and a giant magnetoresistance effect on the order of 1% in Co_{0.26} Cu_{0.74} and 1.7% in Co_{0.19} Cu_{0.81} alloy films at …

Multiple Structures Of (110) Csl Twist Boundaries In Fcc Metals, A. Ghafoor, B. A. S. Faridi, S. A. Ahmad

Turkish Journal of Physics

The geometry of different possible structures of (110) fcc twist boundaries is explored. Computer simulation of all possible low energy structures have been carried out for \Sigma=3 and \Sigma=9 twist boundaries using many-body potentials representing copper, silver and gold. Low symmetry structures are found to have lower energies than the high symmetry CSL structures.

Properties Of Mos Capacitors Produced On Sige Formed By Ge-Implanted Si, M. Şahi̇n, Serhat Özder, Raşi̇t Turan

Turkish Journal of Physics

Metal-oxide-semiconductor (MOS) capacitors fabricated on Ge-implanted Si have been investigated by using C-V and G-V measurements. The control sample on pure Si substrate yielded normal C-V and G-V characteristics. The Ge-implanted MOS samples exhibited anomalous C-V and G-V behavior. The C-V curves of the samples were strongly frequency dependent both in the accumulation and inversion regions. They shift almost in parallel to higher values with decreasing frequency, reaching the oxide capacitance value in the quasi-static (QS) measurement. A band structure and equivalent circuit model were introduced to explain this and other features of the experimental observations. It is shown that …

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Mössbauer-Effect Study Of Fine Atomic Structure Of Fe-Ni-C Alloys, K. G. Binnatov, A. O. Mekhrabov

Turkish Journal of Physics

Fine atomic structure of Fe-Ni-C alloys containing of 30-36 wt. % Ni and 0.1-1.0 wt. % C have been analysed by means of a nuclear \gamma -resonance method. The alloys under investigation were in austenite phase. The study shows that the effective hyperfine magnetic field H_{eff} on the ^{57}Fe nuclei is affected by the presence of C atoms in Fe-Ni alloys and the mean value of H_{eff} fields increase with increasing of C element content in these alloys. It has been detected that increase in carbon content in Fe-Ni alloys leads to a broadening of Mössbauer absorption lines. On the …

Cover And Contents

Turkish Journal of Physics

No abstract provided.

The Muddy Boundaries Between Res Judicata And Full Faith And Credit, Stewart E. Sterk

Articles

The Full Faith and Credit Clause of the U.S. Constitution requires states to respect and recognize the legal decisions of other states, but its application is limited when it comes to judgments that attempt to control future behavior or infringe on a state's sovereignty. The article argues that while the clause ensures finality and uniformity, it does not obligate states to enforce sister-state injunctions or orders that dictate conduct beyond their borders. This distinction is particularly evident in cases involving family law, where states retain flexibility to modify or ignore prior judgments based on evolving circumstances, such as the best …

Saudi Medical Journal The New Century, Basim A. Yaqub, Saleh M. Al-Deeb

Saudi Medical Journal

No abstract provided.

Computer Graphics Optique: Optical Superposition Of Projected Computer Graphics, Aditi Majumder

Link Foundation Modeling, Simulation and Training Fellowship Reports

We present some ideas and demonstrations for a hybrid projector-based rendering and display technique we call Computer Graphics Optique. Instead of partially overlapping projected images to achieve a wide-area display, we completely overlap projected images on top of each other to achieve the addition of light and color in an "optical composition buffer''. The idea is to use the optical composition to replace some analytical computation, to increase rendering speed, gain flexibility, intensity range, and intensity resolution. Where projector-based displays are appropriate, potential uses include the optical realization of certain effects normally requiring a digital accumulation buffer, the optical composition …

Computer Graphics Optique: Optical Superposition Of Projected Computer Graphics, Aditi Majumder

Link Foundation Modeling, Simulation and Training Fellowship Reports

We present some ideas and demonstrations for a hybrid projector-based rendering and display technique we call Computer Graphics Optique. Instead of partially overlapping projected images to achieve a wide-area display, we completely overlap projected images on top of each other to achieve the addition of light and color in an "optical composition buffer''. The idea is to use the optical composition to replace some analytical computation, to increase rendering speed, gain flexibility, intensity range, and intensity resolution. Where projector-based displays are appropriate, potential uses include the optical realization of certain effects normally requiring a digital accumulation buffer, the optical composition …

Enhancing Training And Presence In Virtual Environments Using Passive Haptics, Brent E. Insko

Link Foundation Modeling, Simulation and Training Fellowship Reports

One of the worst virtual environment experiences is to virtually contact something and feel nothing. Visual-haptic sensory conflicts are normally dominated by visual perception. Therefore, augmenting a high-fidelity visual virtual environment with low-fidelity haptic objects, called passive haptics, should markedly improve both sense of presence and task training effectiveness. Testing these hypotheses, I found adding a 1.5 inch physical ledge to a visual-cliff virtual environment increased participants' sense of presence as measured by subjective questionnaires, observed participant behaviors, and physiological responses. I next examined memory model creation and training effectiveness for a navigation task in a virtual environment with and …

Teaching The Law Of Race (Book Review), Anthony V. Alfieri

Articles

No abstract provided.

The Rise Of Dispersed Ownership: The Roles Of Law And The State In The Separation Of Ownership And Control, John C. Coffee Jr.

Faculty Scholarship

Recent scholarship on comparative corporate governance has produced a puzzle. While Berle and Means had assumed that all large public corporations would mature to an end-stage capital structure characterized by the separation of ownership and control, the contemporary empirical evidence is decidedly to the contrary. Instead of convergence toward a single capital structure, the twentieth century saw the polarization of corporate structure between two rival systems of corporate governance:

1. A Dispersed Ownership System, characterized by strong securities markets, rigorous disclosure standards, and high market transparency, in which the market for corporate control constitutes the ultimate disciplinary mechanism; and
2. A …

An Investigation Into The Use Of The Internet For Medical Informatics, Patricia A. Williams

Theses: Doctorates and Masters

The rapid evolution and popularity of the Internet technologies, and the World Wide Web, have resulted in unrestricted worldwide access to medical and health information. This has provided the medical profession with the ability to access up to date research more immediately than by traditional means, and has created the potential for advanced information collation. Also the availability of medical literature, previously difficult to obtain for the general public, is having an effect that is both a benefit and a burden to the medical profession. Whilst benefits exist in the use of the Internet in General Practice for clinical support, …

Statistical Multiplexing And Connection Admission Control In Atm Networks, Guoqiang Mao

Theses: Doctorates and Masters

Asynchronous Transfer Mode (ATM) technology is widely employed for the transport of network traffic, and has the potential to be the base technology for the next generation of global communications. Connection Admission Control (CAC) is the effective traffic control mechanism which is necessary in ATM networks in order to avoid possible congestion at each network node and to achieve the Quality-of-Service (QoS) requested by each connection. CAC determines whether or not the network should accept a new connection. A new connection will only be accepted if the network has sufficient resources to meet its QoS requirements without affecting the QoS …

A Framework For River Restoration Planning : Considering Conceptual And Structural Perspectives From Case Studies Of The Liao River In China And The Kalgan River In Australia, Ye Sun

Theses: Doctorates and Masters

Over the last decade, restoration ecology has been considered a new paradigm for dealing with many of the environmental problems of river systems. It is also recognized that management decisions have a greater chance of being successful if they are based on a thorough understanding of a concept or a plan. A review of current studies on river restoration and river restoration planning revealed that managers and scientists have put a substantial emphasis on ecological science and technology in restoration, while many sociopolitical and economic elements have been de-emphasized Besides this, understanding and experiences of river restoration, especially those of …

Vlsi Implementation Of A Massively Parallel Wavelet Based Zerotree Coder For The Intelligent Pixel Array, Geoffrey N. Alagoda

Theses: Doctorates and Masters

In the span of a few years, mobile multimedia communication has rapidly become a significant area of research and development constantly challenging boundaries on a variety of technologic fronts. Mobile video communications in particular encompasses a number of technical hurdles that generally steer technological advancements towards devices that are low in complexity, low in power usage yet perform the given task efficiently. Devices of this nature have been made available through the use of massively parallel processing arrays such as the Intelligent Pixel Processing Array. The Intelligent Pixel Processing array is a novel concept that integrates a parallel image capture …

To The Flag: America's Banner Of Enduring Freedom, Don P. Diffine Ph.D.

Belden Center Monographs

What in the world is at stake for America's "Operation Enduring Freedom," our war on terrorism? How shall we gauge the future of our land so recently visited with terrorism against our pillars of capitalism, the New York Trade Center Twin Towers? We have been violated, lost our innocence, and the stakes are high.