Digital Commons Network^™

A General Statistical Approach To Engineering Problem Solving., Ali Akbar Moshirpour

Graduate Theses, Dissertations, and Problem Reports (ETD)

A non-deterministic approach to engineering problem solving is developed, with the emphasis on the effects of manufacturing and service uncertainties on selected performance characteristics and economic factors. The approach integrates concepts from probability analysis, statistical inference, and decision making theory into a coherent framework, which is identified here as the Decision Model for Engineering (DME). The main innovative aspect of this approach is the application of a general method for statistical inference based on the Bayes' theorem to quantify probabilities of random variables for subsequent use as inputs to a decision making model. The solution to a Bayesian inference problem …

'Regional' Political Ecology And Underdevelopment In Appalachia: Case Studies From Two West Virginia Counties., James Todd Nesbitt

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation analyzes the environmental history of Pendleton and Randolph Counties, West Virginia, as it relates to underdevelopment within the broader Appalachian region. Theories of political ecology and reconstructed regional geography are used to gain a better understanding of the intersection between cultural practice and human use of the natural environment. Specifically, three case study locales are utilized in this study to demonstrate local variability in natural resource issues within the Appalachian region. Political ecology and reconstructed regional geography are integrated to create a conceptually and contextually refined 'regional' political ecology which accounts for issues of geographic scale and alternative …

Monte Carlo Studies Of Instabilities In Solids Under External Strains And Stresses., Anatoli M. Peredera

Graduate Theses, Dissertations, and Problem Reports (ETD)

We use dynamical Monte Carlo simulations to investigate instabilities of solids in the presence of externally applied stresses or strains. One of the instabilities is the classical Euler buckling instability of compressed rods. We address, for the first time, the dynamical aspects of this instability, that is, we study how an initially straight flexible chain reaches the final buckled configuration at long times. We find that this process has much in common with coarsening phenomena such as the spinodal decomposition or unstable mound growth in molecular beam epitaxy. Evolving chain's profile is like a wave with a wavelength which grows, …

Thermoconvective Instability Of Paramagnetic Fluids In A Uniform Magnetic Field, Jie Huang, Boyd F. Edwards, Donald D. Gray

Faculty & Staff Scholarship

No abstract provided.

Outlook Magazine, Winter 1997

Outlook Magazine

No abstract provided.

Outlook Magazine, Summer 1997

Outlook Magazine

No abstract provided.

Outlook Magazine, Spring 1997

Outlook Magazine

No abstract provided.

Techniques For Lossless Image Compression, Daniel R Jenkins

UNLV Retrospective Theses & Dissertations

Popular lossless image compression techniques used today belong to the Lempel-Ziv family of encoders. These techniques are generic in nature and do not take full advantage of the two-dimensional correlation of digital image data. They process a one-dimensional stream of data replacing repetitions with smaller codes. Techniques for Lossless Image Compression introduces a new model for lossless image compression that consists of two stages: transformation and encoDing Transformation takes advantage of the correlative properties of the data, modifying it in order to maximize the use of encoding techniques. Encoding can be described as replacing data symbols that occur frequently or …

Two Optimization Techniques For Designing Multiplierless Fir Filters, Torrance Matthew Lawton

UNLV Retrospective Theses & Dissertations

This thesis introduces two optimal design techniques for discrete time finite impulse response (FIR) multiplierless filters with constant group delay. The first technique minimizes a weighted least squared optimality criteria. The second technique minimizes a weighted least squared optimality criteria subject to user specified frequency constraints. Examples are included of transport processor applications and finite wordlength coefficient applications.

The Lantern Yearbook, 1997

Lambuth Lantern Yearbook

"The Lantern" yearbook of Lambuth University in Jackson, Tennessee, for 1997.

A History Of The Las Vegas School Desegregation Case: Kelly Et Al V The Clark County School District, Ronan Matthew

UNLV Retrospective Theses & Dissertations

Kelly et al. v. Clark County School District (1972) is the title of a case initiated in 1968. The lawsuit alleged that de facto segregation existed in six elementary schools in Westside Las Vegas, 14 years following Brown v. Board of Education (1954) which called for the desegregation of American public schools. The case ended in 1972 with a victory for the plaintiffs, with the ordering of desegregation of the elementary schools in question. The purpose of this study was to examine the history of Kelly et al. v. Clark County School District (1972). Included in the study were a …

Minds-On And Hands-On Activity: Improving Instruction In Science For All Students, Thomas Andre

Mid-Western Educational Researcher

This paper briefly reviews evidence on gender inequities in science education. It argues that making science instruction more effective is one way in which greater equity can be achieved. A line of research conducted in my laboratory dealing with conceptual change (CC) approaches to science instruction is discussed. CC instruction explicitly activates students’ pre-existing conceptions, leads students to be dissatisfied with less than adequate conceptions, and helps students construct more effective conceptions. Across several studies, CC instruction was found to be more effective than didactic instruction. CC features added to science text and science lessons facilitate learning for both males …

A Finite Element Model With Penalty Formulation To Predict The Pressure And Velocity Behavior In A Pultrusion Die Inlet, Srikanth Elaprolu

Electronic Theses and Dissertations

No abstract provided.

Economic Lessons Of The Kobe Earthquake, G. Horwich

Purdue CIBER Working Papers

The earthquake that struck the Japanese port city of Kobe on January 17, 1995, was the most severe quake ever to strike a modern urban area. It has become the most studied, analyzed, and discussed natural disaster in history. What I propose to add to this dialogue is an economist's overview of what he saw in Kobe 19 months after the event and what he learned during the ensuing 6 months.

1997 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Herpicc

Indiana Local Technical Assistance Program (LTAP) Directory

Contact information for agency officials and employees responsible for Indiana’s local road infrastructure.

Computer-Aided Mechanical Assembly Design Using Configuration Spaces, Leo Joskowicz, Elisha Sacks

Department of Computer Science Technical Reports

No abstract provided.

Financial Prediction And Trading Strategies Using Neurofuzzy Approaches, K. N. Pantazopoulos, L. H. Tsoukalas, N. G. Bourbakis, M. J. Brün, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.

Performance Analysis And Visualization Tools For Parallel Computing, K. N. Pantazopoulos, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.

Future Scientific Software Systems, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

Interface Relaxation Methods For Elliptic Differential Equations, John R. Rice, P. Tsompanopoulou, E. Vavalis

Department of Computer Science Technical Reports

No abstract provided.

Reflection Anistropy Spectroscopy Study Of The Near Surface Electric Field In Low-Temperature Grown Gaas (001), Todd Holden, Fred H. Pollak, J. L. Freeouf, D. Mcinturff, J. L. Gray, Mark S. Lundstrom, J. M. Woodall

Department of Electrical and Computer Engineering Faculty Publications

We have evaluated an ‘‘effective depletion width’’ of =< 45 Å and the sign (n-type/upward band bending) of the near surface electric field in low-temperature grown GaAs ~001! using the optical method of reflection anisotropy spectroscopy in the vicinity of the spin-orbit split E₁ , E₁ + Delta₁ optical features. Our results provide evidence that surface Fermi level pinning occurs for air exposed (001) surfaces of undoped low temperature grown GaAs.

Technique For Measurement Of The Minority Carrier Mobility With A Bipolar Junction Transistor, S. L. D'Souza, Michael R. Melloch, Mark S. Lundstrom, E. S. Harmon

Department of Electrical and Computer Engineering Faculty Publications

A simple technique to measure the minority carrier mobility using a bipolar junction transistor is demonstrated. By fixing the base-emitter voltage, the carrier injection into the base is constant. The collector current is then monitored as a function of a magnetic field applied perpendicular to the current transport across the base. The magnetic field leads to an increase in base transit time and a corresponding decrease in collector current. From the resulting fractional change in collector current, the minority carrier mobility in the base can be determined. For narrow base transistors, quasiballistic transport across the base must be taken into …

Electrical Characteristics Of Nearly Relaxed Inas/Gap Heterojunctions, E H. Chen, T. P. Chin, J. M. Woodall, Mark S. Lundstrom

Department of Electrical and Computer Engineering Faculty Publications

The electrical properties of lattice mismatched InAs/GaP heterojunctions are examined. In spite of a high dislocation density at the heterointerface, the current versus voltage characteristics show nearly ideal behavior with low reverse leakage currents and high breakdown voltages. The forward currentvaried exponentially with bias displaying ideal factors of 1.10 or less. Band offsets estimated from current–voltage and capacitance–voltage analysis are consistent with previous estimates based on differences in Schottky barrier heights.

Computing Moments Of Piecewise Polynomial Surfaces, Carlos Gonzalez-Ochoa, Scott Mccammon, Jörg Peters

Department of Computer Science Technical Reports

No abstract provided.

Videotext Database System, Haitao Jiang, Danilo Montesi, Ahmed K. Elmagarmid

Department of Computer Science Technical Reports

No abstract provided.

Approximation Of Spin Coating With A Genetic Algorithm Based Neural Network, Ching-Fu Li

Electronic Theses and Dissertations

No abstract provided.

Howling The Truth Inarticulate : A Comparative Study Of D.H. Lawrence And Frank Norris, Jay Anthony Lowrey

Electronic Theses and Dissertations

No abstract provided.

Dynamic Characteristics Of A Four-Bar Linkage Coupler Fabricated From Pultruded Composite Materials, Meganathan Mohanraj

Electronic Theses and Dissertations

No abstract provided.

Behavior Of The Pressure Rise In A Pultrusion Die Inlet, Kevin S. Raper

Electronic Theses and Dissertations

No abstract provided.

Vibration Analysis Of Textile Air Distribution Systems, Alan Bateman

Theses

Textile air-distribution systems are air permeable materials used for air delivery applications where problems associated with solid steel ducting, such as condensation, local draughts, noise and hygiene are to be eliminated. The aim of this project was to investigate the causes of duct wall vibration in textile air-distribution systems. This was undertaken by consideration of the three aspects of a fluid dynamics problem; a) theoretical analysis, b) experimental analysis and c) analysis using Computational Fluid Dynamics.

The aspect of textile air-distribution systems is still at an infancy stage and no publicised research was encountered in this area. Thus, the approach …