Digital Commons Network^™

Trends Of Vehicular Emissions For Clean Air Associates Precombustion Retrofit Device, Jaya Vani Nagireddi

Civil Engineering Theses - Archive

The research study objective was to find if there was any reduction in onboard exhaust emissions from a light duty passenger car (2007 Dodge Charger) with a Clean Air Catalytic Converter manufactured by Clean Air Associates, Inc. The research was conducted by the Civil and Environmental Engineering Department, University of Texas at Arlington as part of the North Central Texas Council of Governments Aftermarket Technology and Fuel Additive Research Program. Initially, emissions of pollutants were measured without the Clean Air Associates' retrofit device, called Baseline testing. A Horiba OBS-1300 On-Board System measured concentrations of the pollutants NOx, CO, CO2 and …

Modeling Unsaturated Soil Response Under Suction-Controlled Multi-Axial Stress States, Arthit Laikram

Civil Engineering Dissertations - Archive

In this research work, a novel suction-controlled true triaxial testing apparatus has been developed to test 3-in (7.5-cm) side, cubical specimens of unsaturated soil under controlled-suction states for a wide range of stress paths that are not easily achievable in a conventional cylindrical apparatus. The equipment is a mixed-boundary type of device, with the specimen seated on top of a high-air-entry ceramic disk and between five flexible (latex) membranes on the remaining sides of the cube. The new cell is an upgraded, more elaborate version of the one previously reported by Hoyos (1998), featuring two independent pore-air and pore-water pressure …

Suppressing Delta-I Noise In Mcml Circuits In Mixed Signal Environment, Ritesh Jayant Mehta

Electrical Engineering Theses - Archive

This work addresses the problem of simultaneous switching noise (SSN) in mixed signal environment. It is shown that the Metal Oxide Semiconductor Current Mode Logic (MCML) can be used to minimize the SSN. In short channel devices, Drain Induced Barrier Lowering (DIBL) effect causes the current mismatch problem. It is seen that this current mismatch problem aggravates SSN. Basic logic gates were designed using MCML topology at 5 Gbps. Parasitic model was introduced at power supply lines and substrate to study the behaviour of these logic gates in the presence of parasitics. Interpolation type delay cells were used to suppress …

Developing The Competency Of Serious Play, Mark D. Hylton

Creativity and Change Leadership Graduate Student Master's Projects

This project explored the development of serious play as a personal competency of creative leadership and as a dimension of a creative organizational climate. Skill development was undertaken through acquiring certification as a LEGO® Serious Play™ facilitator and three workshops were subsequently delivered to a range of clients. The principles of play and Papert’s theory of constructionism were used to develop a serious of creative products as prototypes tried out with clients in the form of team based games. The outcomes of this project are ideas on how to bring play into the workplace, creating a climate for creativity and …

Resilient Teachers: A Qualitative Study Of Six Thriving Educators In Urban Elementary Schools, Paul Giroux

Dissertations

This qualitative research study used elements of phenomenological and narrative research methodology to explore the common characteristics and experiences of a sample of resilient elementary teachers working in urban schools. The six research subjects in this study’s sample each had at least eight years of teaching experience, and each participated in a cycle of three in-depth interviews designed to determine their degree of resilience and to develop a portrait of their personal and professional characteristics, experiences, attitudes and beliefs. Once the data collection phase was complete, data was coded and then analyzed to identify which of the characteristics and experiences …

Estimating Evapotranspiration And Seepage For A Sinkhole Wetland From Diurnal Surface-Water Cycles, A. Jason Hill, Vincent S. Neary

KIP Articles

This study used measured diurnal surface-water cycles to estimate daily evapotranspiration (ET) and seepage for a seasonally flooded sinkhole wetland. Diurnal surface-water cycles were classified into five categories based on the relationship between the surface-water body and the surrounding ground-water system (i.e., recharge/discharge). Only one class of diurnal cycles was found to be suitable for application of this method. This subset of diurnal cycles was used to estimate ET and seepage and the relative importance of each transfer process to the overall water budget. The method has limited utility for wetlands with erratic hydrologic regimes (e.g., wetlands in urban environments). …

Harvesting The Devil's Garden, Andrew Schurgott

Global CWD Repository

Ambitious development plans for the Northwest Coast run into a 65-year-old problem waiting beneath the sand...

Improved Covariance Model Parameter Estimation Using Rna Thermodynamic Properties, Jennifer A. Smith, Kay C. Wiese

Electrical and Computer Engineering Faculty Publications and Presentations

Covariance models are a powerful description of non-coding RNA (ncRNA) families that can be used to search nucleotide databases for new members of these ncRNA families. Currently, estimation of the parameters of a covariance model (state transition and emission scores) is based only on the observed frequencies of mutations, insertions, and deletions in known ncRNA sequences. For families with very few known members, this can result in rather uninformative models where the consensus sequence has a good score and most deviations from consensus have a fairly uniform poor score. It is proposed here to combine the traditional observed-frequency information with …

Ipulse: December 2007, Lynn University

Student Newspapers

Issues:

• December 5, 2007
• December 6, 2007
• December 7, 2007

Stochastic Models For In-Silico Event-Based Biological Network Simulation, Preetam Ghosh

Computer Science and Engineering Dissertations - Archive

The multi-scale biological system model is a new research direction to capture the dynamic measurements of complex biological systems. The current statistical thermodynamic models can not scale to this challenge due to the explosion of state-spaces of the system, where a biological organ may have billions of cells, each with millions of molecule types and each type may have a few million molecules. We seek to propose a phenomenological theory that will require a smaller number of state variables to address this multi-scaling problem. Discrete Markov statistical process is used to understand the system dynamics in the networking community for …

A Cfd Investigation Of Axisymmetric Microthruster Nozzles For Use On Nano-Satellites, Michael R. O'Gara

Master's Theses - Daytona Beach

The performance of microthruster nozzles (^ 0.1 N thrust) depending on nozzle contour, propellant and surroundings, destined for use in nanosatellite missions, is investigated via a numerical approach using the Wind-US flow solver. An experimental apparatus designed to measure microthruster performance in atmospheric or vacuum conditions used to aid numerical simulations is also presented. Comparing the numerical and experimental results show an approximate 25% drop in efficiency for unknown reasons. An evaluation of favorable nozzle contours suggested by previous researchers is conducted, and the results demonstrate the need for a more rigorous treatment of the nozzle flow at the exit …

Non-Invasive Measuerments Of Bone Strain During Mechanical Loading Using Pulsed Phase-Locked Quantitative Ultrasound, Frederick Serra-Hsu

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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The Role Of Smpb Protein In Trans-Translation, Thomas Robert Sundermeier

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Experimental Constraints On The Frictional Properties Of Fault Zones Through The San Andreas Fault Observatory At Depth Scientific Drilling Project, Sheryl Tembe

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Endoscopic Optical Coherence Tomography For Bladder Cancer Diagnosis, Zhenguo Wang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Feature-Driven Illustrative Visualization And Graphics, Lujin Wang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Modeling Of Air-Droplet Interaction, Substrate Melting And Coating Buildup In Thermal Spraying, Guanghua Wei

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Some Aspects Of Internet Portal Market Competition, Volha Chuvakin

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Single Photon Counting For Ultra-Weak Fluorescence Detection: System Design, Characterization And Application To Dna-Sequencing., Vinit H. Dhulla

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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Structural And Functional Studies Of Negative Regulators Of Tcr Signaling, Yunting Chen

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

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The Functional Analysis Of Four Connexin50 Variants To Determine The Physiological Relevance Of Connexin50 Protein Domains, Adam Michael Derosa

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

Characterization Of Damage Due To Environmental Conditions In Heterogeneous Material Systems, Narayanan Ramanujam

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

[to be added]

Volume 27, Number 4, December 2007 Olac Newsletter, Jain Fletcher, Jay Weitz, Barbara Vaughan, Amy K. Weiss

OLAC Newsletters

Digitized December 2007 issue of the OLAC Newsletter.

Open Markets, Competitive Democracy, And Transparent And Reliable Legal Systems: The Three Legs Of Development, James R. Jones

Chicago-Kent Law Review

In the 1990s, reform swept through Latin America. Open markets replaced closed economies. Real democracy replaced one-party rule and rigged elections. For about half of the region's population, economic and political conditions improved—yet the gap between the rich and poor widened. The poor half received little or no tangible benefits from these economic and democratic reforms. This article argues that the most difficult and probably most important reform remains to be accomplished: the reform of the legal and regulatory systems throughout Latin America. Until that happens, dreams of first-world recognition and respectability will elude Latin nations.

Corporate Social Responsibility: The Role Of Law And Markets And The Case Of Developing Countries, Antonio Vives

Chicago-Kent Law Review

In order for the corporation to engage in responsible practices, many obstacles must be overcome. One such obstacle is the belief of many managers that the corporation would be violating its fiduciary responsibility if it engaged in activities that go beyond what is required by the law. Another obstacle is that many of those practices have a real cost but are perceived not to have a corresponding tangible benefit. The article discusses and dismisses these perceived obstacles and argues that it is both through law and the workings of the market that responsible behavior can enhance society's welfare. It is …

Uncertainty And Loss In The Free Speech Rights Of Public Employees Under Garcetti V. Ceballos, Sarah F. Suma

Chicago-Kent Law Review

Resolving a circuit split, the Supreme Court declared in Garcetti v. Ceballos that the First Amendment does not protect speech made pursuant to a public employee's work duties, regardless of whether the speech relates to a matter of public concern or the government's restrictions are justifiable. This article argues that a bright line rule eliminating First Amendment protection for job-duty speech is inconsistent with the theories underlying free speech protection. Further, this article explores practical drawbacks to Garcetti's bright-line rule, including inconsistent judicial determination of the scope of job duties, a disincentive to report government abuse through one's chain-of-command, …

Regulation Of D-Xylose Metabolism In Caulobacter Crescentus By A Laci-Type Repressor, Craig Stephens, Beat Christen, Kelly Watanabe, Thomas Fuchs, Urs Jenal

Biology

In the oligotrophic freshwater bacterium Caulobacter crescentus, D-xylose induces expression of over 50 genes,including the xyl operon, which encodes key enzymes for xylose metabolism. The promoter (PxylX) controllingexpression of the xyl operon is widely used as a tool for inducible heterologous gene expression in C. crescentus. We show here that PxylX and at least one other promoter in the xylose regulon (PxylE) are controlled by theCC3065 (xylR) gene product, a LacI-type repressor. Electrophoretic gel mobility shift assays showed that operator binding by XylR is greatly reduced in the presence of D-xylose. The data support the hypothesis that there is a …

Stress Distribution And Strength Prediction Of Composite Laminates With Multiple Holes, Brian Esp

Mechanical and Aerospace Engineering Dissertations - Archive

The major purpose of this study was to investigate failure of composite laminates with multiple unloaded holes in close proximity. The least square boundary collocation method for anisotropic materials was utilized to determine the state of stress. The approach utilized collocation on both the internal and external boundaries, making it relatively easy to implement. The method compared favorably to both published and finite element solutions. A failure prediction approach for an infinite, symmetric and balanced laminate, with two holes in close proximity was presented. The baseline material for consideration was IM7/977-3, a carbon fiber/epoxy lamina. The failure prediction method was …

An Analytical And Numerical Model For Design Of Non- Uniformly Powered Silicon Chips Based On Both Thermal And Device Clock Performance, Abhihit D. Kaisare

Mechanical and Aerospace Engineering Dissertations - Archive

Silicon chips continue to grow in capabilities, complexity and performance. Silicon chips typically integrate functional components such as logic and level two (L2) cache memory in their architecture. This functional integration of logic and memory results in improved performance of the chip. However, the integration also introduces a layer of complexity in the thermal design and management of silicon chips. As a direct result of functional integration, the power map on a silicon chip is typically highly non-uniform and the assumption of a uniform heat flux across the chip surface has been shown to be invalid post Pentium II architecture. …

Thermal Stresses Of Composite Beams With Rectangular And Tubular Cross-Sections, Chia-Wei Su

Mechanical and Aerospace Engineering Theses - Archive

Closed-form analytical solutions for laminated composite beams with tubular and rectangular cross-sections are developed for evaluating the thermal induced stresses. The derivations are based on modified lamination theory and parallel axis theorem. The present approach includes variation of ply stiffness along the contour of the cross-section. The interlaminar shear stress of cantilever composite beam with rectangular cross-section under a transverse load is analytically proved to be independent of temperature change in uniform temperature environment. Three-dimensional finite element models for computing thermal stresses of both cross-sections are developed using commercial software package ANSYS 10. The results obtained from analytical solutions give …