Digital Commons Network^™

Development Of Transparent Lsco And Lscno Conductors For Optical Shutter Systems, Robert W. Schwartz, M. T. Sebastian, M. Charoenwongsa, H. D. Dobberstein

Mechanical and Aerospace Engineering Faculty Research & Creative Works

We have prepared lanthanum strontium cobalt oxide (La0.50Sr0.50CoO3; LSCO 50/50) and lanthanum strontium cobalt nickel oxide (La0.50Sr0.50Co0.50Ni0.50O3; LSCNO) as candidate transparent electrodes for use in a shutter-based infrared sensor protection device. The shutter device requires that the electrode be transparent (80% transmission) and have moderate sheet resistance (300 Ω/sq.). Because of the effects of film thickness on intrinsic material properties, such as resistivity and extinction coefficient, and simple engineering issues (i.e., the relationship between film thickness, resistance and transmission), films of various thicknesses were prepared to achieve an optimal balance of electrical and optical performance. van der Pauw measurements and …

Dynamics Of Poly(Vinyl Acetate)-D₃ On Silica, Robert D. O'Connor, Frank D. Blum, Gu Xu

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Poly(vinyl acetate) (PVAc) is an important polymer in applications because of both its bulk and surface characteristics. Its chain architecture gives it a low Tg and, generally, good qualities for processing and applications, which include paints, adhesives, thin films and surface coatings. In this study, we investigate the surface dynamics of PVAc absorbed onto silica with deuterium nuclear magnetic resonance (2H NMR). For dynamics studies, 2H NMR is an excellent technique because it uses an innocuous probe that can report on correlation times (τc) from approximately 10-8 s to 10 s. We report the use of two-dimensional exchange NMR (2D-X) …

Robust State Dependent Riccati Equation Based Robot Manipulator Control, Ming Xin, S. N. Balakrishnan, Zhongwu Huang

Mechanical and Aerospace Engineering Faculty Research & Creative Works

We present a new optimal control approach to robust control of robot manipulators in the framework of state dependent Riccati equation (SDRE) technique. To treat this highly nonlinear control system, we formulate it as a nonlinear optimal regulator problem. SDRE technique was used to synthesize an optimal controller to this class of robot control problem. We also synthesize a neural network based extra controller to achieve the robustness in the presence of the parameter uncertainties. A typical two-link robot position control problem was studied to show the effectiveness of SDRE approach and robust extra control design to robotic application.

The Trusteeship Of Legal Rulemaking, Edward S. Adams, Richard A. Saliterman

Articles

Professor Robert D. Putnam's work is, in many respects, the contemporary companion to Democracy in America.' It comprehensively surveys and tests common presumptions held about our democracy with apparently very reliable quantitative data. Until recently, a work of this depth and breadth has been unavailable. Putnam sets forth a well supported thesis suggesting that even though American financial capital may be at a high, its "social capital" has perhaps reached a record low, or at least a level similar to the social, economic, and legal bottleneck of a century ago.' His use of empirical and combined data, however, probes into …

The Role Of Experience And Active Learning In Web-Based Training For Applying Knowledge, Deborah L. Dunaway

LSU Doctoral Dissertations

The purpose of this study was to test a new method for presenting information on the internet in a format that enhances adaptive learning and transfer to real-world applications. This web-based training method, called Cognitive Toolboxes (Mathews, 2001) involves analyzing course content into goal-based categories (toolboxes) linked to sets of knowledge facets (tools) and applications (cases). Three experiments examined the effects of internet access to different aspects of toolbox content (tools, toolbox names and cases) on subsequent application of the material to real-world problems. Results show that access to the organizational aspects of the method (tools organized into toolboxes) facilitated …

Women's International Tribunal On Japanese Military Sexual Slavery, Christine M. Chinkin

Articles

From December 8 to 12,2000, a peoples' tribunal, the Women's International War Crimes Tribunal 2000, sat in Tokyo, Japan. It was established to consider the criminal liability of leading high-ranking Japanese military and political officials and the separate responsibility of the state of Japan for rape and sexual slavery as crimes against humanity arising out of Japanese military activity in the Asia Pacific region in the 1930s and 1940s.

The immediate background to the tribunal's establishment was a series of events commencing in 1988 when the women's movement in the Republic of Korea began to learn of the research of …

Effects Of Defects On Armatures Within Helical Flux-Compression Generators, Jason Baird, Paul Nicholas Worsey, Mark F. C. Schmidt

Mining Engineering Faculty Research & Creative Works

Tubes of aluminum and copper filled with C-4 high-explosive were tested during this study of the effects of explosive flaws and voids, their sizes and locations, and of the effects of armature machining tolerances on the expansion characteristics of armatures within helical flux-compression generators. Flaws and voids were introduced into the explosive fill of 6061-T6 aluminum armatures during assembly. The defects were located along the major axis of the fill, midway between the major axis and the explosive/armature interface, and at the interface. The resulting effects on armature expansion were recorded by high-speed framing camera, intensified charge-coupled display (ICCD) photography …

Surface Fracturing Of Armatures Within Helical Flux-Compression Generators, Paul Nicholas Worsey, Jason Baird

Mining Engineering Faculty Research & Creative Works

Tubes of aluminum and of copper filled with C-4 high-explosive were tested during this study of high strain rate effects within thin metallic structures performed as an adjunct to helical flux-compression generator research at the University of Missouri-Rolla. Focusing on the stresses within a relatively thin metallic structure when brisant explosives abutting the structure are detonated, this study directly affects the understanding of flux cutoff and high strain-rate resistivity changes in an expanding armature. The detonation wave is compressive, and the shock waves resulting from its transmission into a thin metallic structure cause both compressive and tensile regions, posing an …

Agglomerated Die Casting Lubricant, Mary R. Reidmeyer

Materials Science and Engineering Faculty Research & Creative Works

A lubricant for use in lubricating the shot sleeve of a machine for die casting molten metals is in the form of agglomerated particles. The particles have an inorganic high pressure lubricant agglomerated, with a binder material and with an organic material. The solid lubricant is resistant to dusting, caking and breakage, can be fed through an automatic dispensing machine, and combines inorganic and organic materials to achieve excellent lubrication properties. The product has low flash and low smoke release into the environment.

Chemical Plating Method, Electrolytic Cell And Automotive Oxygen Sensor Using It, Mary R. Reidmeyer, Matthew J. Donelon, Robert F. Killion

Materials Science and Engineering Faculty Research & Creative Works

An automotive lambda oxygen sensor is formed by electroless plating of a thin, catalytically active, conductive electrode uniformly on the outer surface of a zirconia thimble. The process includes forming a pristine zirconia solid electrolyte thimble and drilling out a cylindrical cavity in it. A porous outer surface suitable for producing crystallization sites is formed by dipping the unfired thimble in a zirconia slurry containing spray-dried microspheres and firing the coated thimble to densify the thimble and the microspheres and to produce cavities on the surface of the thimble. An inner platinum electrode is formed by conventional conductive ink painting …

Spectrally Selective, Matched Emitters For Thermophotovoltaic Energy Conversion Processed By Tape Casting, L. G. Ferguson, Fatih Dogan

Materials Science and Engineering Faculty Research & Creative Works

The thermophotovoltaic (TPV) generator converts radiant energy from a high temperature emitter element into electric power using infrared responding photovoltaic cells. Spectral control is a primary issue in TPV applications. Conventional TPV generators have relied on filters to achieve selectivity and spectral control with near-blackbody ceramic emitters. Several practical problems have limited the success of this approach, particularly the present lack of a satisfactory wide-band infrared filter. A new, spectrally selective emitter is described in this work, and will be called the “bandgap matched” emitter because its emissive power spectrum is very efficiently matched with the infrared response of the …

Modelling The Hydrodynamics Of The Patos Lagoon, Brazil, Elisa Helena Fernandes

School of Biological and Marine Sciences Theses

The Patos Lagoon, the largest choked coastal lagoon in the world, is a typical centre of population, commerce, industry and recreation, and consequently it is also a site for disposal of industrial, agricultural and municipal wastes. Important questions concerning beneficial uses of and potential changes to the lagoon and its estuary are left unanswered without a good understanding of hydrodynamic processes. The current study involves the choice, calibration and application of a numerical model which can be used in future hydrodynamic. sediment transport and water quality studies in the area. The two- and three-dimensional modes of the TELEMAC System were …

Investigation Of Quantum Resistor Networks For Electron Wave Computing, Diwakar Ramamurthy

Masters Theses

A new computing methodology using electron waves has been developed with three and four terminal Quantum Resistor Networks as the basic computational structure. Transmission probability matrices for these networks were derived from first principles from which the behavior of single and simultaneously incident electron waves have been accurately evaluated. Classification and scaling laws have also been provided according to their transmission behavior. Techniques for constructing devices from these networks analogous to the logic gates used in digital computing today have been explained. Numerous examples of such devices performing functions like Inversion, OR, and AND have been provided. The operating principles …

The Federal Mine Safety And Health Act Of 1977: Is It Suffering From A Mid-Life Crisis, Karen L. Johnston

Denver Law Review

No abstract provided.

Introduction: Borders, Fran Ansley

Denver Law Review

No abstract provided.

Post-Colonial Economies Of Desire: Legal Representations Of The Sexual Subaltern, Ratna Kapur

Denver Law Review

No abstract provided.

Introduction: Identity And Crisis: The Critical Race Project And Postmodern Political Theory, Gil Gott

Denver Law Review

No abstract provided.

A & (And) M Records, Inc. V. Napster, Inc.: Copyright Infringement On The Internet, Jesse Wiens

Denver Law Review

No abstract provided.

Changing The Rules: Public Access To Dependency Court, Kathleen S. Bean

Denver Law Review

No abstract provided.

Vol. 79, No. 1: Full Issue, Denver University Law Review

Denver Law Review

No abstract provided.

A Low-Cost Intervention For Cleaner Drinking Water In Karachi, Pakistan, S Luby, M Agboatwalla, A Raza, J Sobel, E Mintz, K Baier, M Rahbar, S Qureshi, Rumina Hassan, F Ghouri

Community Health Sciences

Objective: To pilot test an inexpensive, home-based water decontamination and storage system in a low-income neighborhood of Karachi.Methods: Fifty households received a 20-L plastic water storage vessel with a high-quality spout and a regular supply of diluted hypochlorite solution. Twenty-five control households were recruited. Water samples were collected at baseline and during unannounced follow-up visits 1, 3, 6, and 10 weeks later.Results: Baseline drinking water samples among intervention households were contaminated with a mean 9397 colony-forming units (cfu)/100 mL of thermotolerant coliforms compared with a mean 10,990 cfu/100 mL from controls. After intervention the mean concentration of thermotolerant coliforms decreased …

Magnetization And Heat Capacity Of R1/3sr2/3feo3-Δ (R = La And Pr), V. P.S. Awana, M. Karppinen, H. Yamauchi, S. K. Malik, William B. Yelon, Apurva Mehta, A. V. Narlikar

Physics Faculty Research & Creative Works

Results of magnetization and heat capacity (CP) measurements are presented for R₁/₃Sr₂/₃FeO_3-δ compounds with R = La and Pr. The change in entropy (ΔS) near the magnetic transition amounts to only 15% of the theoretically expected value for the Fe³⁺ or Fe⁵⁺ spins magnetic ordering. The lower value of ΔS is explained on the basis of reported Mössbauer studies, which revealed a substantial amount of nonmagnetic Fe⁴⁺ in the compound across the magnetic transition. The C_P peak height across the magnetic transition increases substantially after annealing the …

Crystal And Magnetic Structure Of Pr0.7sr0.3-Xmno3 (0 ≤ X ≤ 0.2) Compounds, Q. Cai, William B. Yelon, M. Ellouze, W. Boujelben, A. Cheikh-Rouhou

Physics Faculty Research & Creative Works

The electronic and magnetic properties of the ABO3 type manganite's (A = rare earth, B = Mn) depend sensitively on the ratio of divalent and trivalent atoms on the A sublattice. The substitution of rare-earth by Ca or Sr not only affects the total valence, but also the lattice spacing, which, in turn may affect the structure and magnetic ordering temperature. If these compounds are synthesized with less than stoichiometric amounts of the A site constituents, (relative to the Mn content), three possible outcomes may be considered: a) single phase materials with vacancies on the A sublattice may be formed, …

A Neutron Diffraction Study Of The Deuterium Site Occupancy In Nd5fe17d15.5, Z. Chu, William B. Yelon, R. K. Murakami, P. S.M. Da Silva, V. Villas-Boas, F. P. Missell

Physics Faculty Research & Creative Works

The intermetallic compound Nd₅Fe₁₇ has potentially important magnetic properties and is being investigated as a possible permanent magnetic material. As with many other rare-earth transition metal compounds, this phase can absorb significant quantities of H(D) and lesser amounts of N. Gravimetric measurement indicate that ∼14-16H(D) atoms can be absorbed per formula unit leading to roughly a 20% increase in saturation magnetization and Curie temperature. We have carried out powder neutron diffraction studies to determine the location of D atoms in a sample of Nd₅Fe₁₇ containing approximately 15.5D/f.u. The large, complex unit cell of Nd …

A Look At The Possible Effects Of Genial/Eclectic Learning Environments In Denmark And The United States Of America, Annette Sigrid Wilson

Graduate Research Papers

The intent of this qualitative research is to gain knowledge and understanding of the impact a genial/eclectic environment may have upon creativity and skillful problem solving. Upon invitation from Benedicte Riis, a well-known Danish educator, composer, author, musician, and presenter in Denmark, Bulgaria, Norway, and the United States; I embarked on a trip to Ebeltoft, Denmark in May of2000 to study her pedagogy. My desire was to compare the methodologies, philosophies, and classroom environments of Benedicte's Tante Andante Hus in Denmark with Franklin Elementary School in Council Bluffs, Iowa. My professors at the University of Northern Iowa encouraged me to …

Storage Free Terrain Simulation, Warren Creemers

Theses : Honours

Landscape visualisation is the process of recreating a natural environment and displaying it in an interactive graphical simulation. To do this a terrain is displayed together with accompanying plant life and other objects. Present landscape visualisation software is capable in theory of displaying very detailed and large landscapes. The software is also in theory capable of simulating environments with thousands if not millions of individually structured plants. In practice though, the simulation of such landscapes requires such a large amount of storage space that it is not achievable on personal computers. Even storing small landscapes with a moderate amount plant …

The Effect Of The Moon Phase On The Daily Catch Rate Of King, Tiger And Endeavour Prawns In The Shark Bay And Exmouth Gulf Fisheries, Tenniel Harman

Theses : Honours

Two of the major commercial prawn fisheries in Western Australia arc located in Exmouth Gulf and Shark Bay. Prawn fishing is the third most valuable fishing industry in WA, producing an annual income of $62 million. These two fishing regions are considered fully exploited (Fisheries WA Home Page) and careful management is needed to produce and maintain them as sustainable fisheries. The Western Australian Marine Research Laboratories have developed detailed computer models which estimate the stock abundance of the prawn fisheries. This provides information on what sort of restrictions should be made to maintain a stainable fishery. The impact of …

Property Rights And Property Rules For Commercializing Inventions, F. Scott Kieff

GW Law Faculty Publications & Other Works

Several recent commentators have criticized trends in the patent system by suggesting that the goals of the system can be better achieved through a variety of approaches that avoid or mitigate the monopoly-type impact of property rights. Suggested alternatives include the use of cash rewards, buy-outs, and liability rules, as distinct from property rules. This paper uses the important contributions made by these commentators to reveal shortcomings in any view of the patent system that focuses only on incentives to engage in inventive activity. The paper offers a new view of the patent system that embraces property rights and property …

Biotechnology And International Law, Sean D. Murphy

GW Law Faculty Publications & Other Works

Emerging applications in the field of biotechnology hold great promise for promoting the health and well-being of the global community, especially in developing states. Yet significant concerns have emerged about biotechnology in the transnational sphere, concerns that no doubt will increase in decades to come. The purpose of the article is to assess the strengths and limits of existing international norms and structures designed to address these concerns, and to suggest a means for augmenting current structures to make them more effective. International law develops and regulates transnational behavior in a manner that goes well beyond the development treaty regimes. …

Chevron, State Farm And The Epa In The Courts Of Appeals During The 1990s, Robert L. Glicksman, Christopher H. Schroeder

GW Law Faculty Publications & Other Works

This study updates an article published a decade ago by the same authors. It presents a systematic analysis of decisions in which EPA or its administrator was a named party in the federal courts of appeals during the 1990s. Relying on a data base of over 300 cases, the main topics of the study are judicial review of statutory interpretation and of EPA's use of science in its rulemaking proceedings. In both the statutory interpretation and scientific areas, one of our most significant findings is evidence that the federal courts have embraced what Tom Grey has termed the new formalism. …