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2006

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Numerical And Asymptotical Study Of Three-Dimensional Wave Packets In A Compressible Boundary Layer, Eric Forgoston, Michael Viergutz, Anatoli Tumin Dec 2006

Numerical And Asymptotical Study Of Three-Dimensional Wave Packets In A Compressible Boundary Layer, Eric Forgoston, Michael Viergutz, Anatoli Tumin

Department of Applied Mathematics and Statistics Faculty Scholarship and Creative Works

A three-dimensional wave packet generated by a local disturbance in a two-dimensional hypersonic boundary layer flow is studied with the aid of the previously solved initialvalue problem. The solution can be presented as a sum of modes consisting of continuous and discrete spectra of temporal stability theory. Two discrete modes, known as Mode S and Mode F, are of interest in high-speed flows since they may be involved in a laminar-turbulent transition scenario. The continuous and discrete spectra are analyzed numerically for a hypersonic flow. A comprehensive study of the spectrum is performed, including Reynolds number, Mach number and temperature …

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Lanthorn, Vol. 41, No. 31, December 11, 2006, Grand Valley State University Dec 2006

Lanthorn, Vol. 41, No. 31, December 11, 2006, Grand Valley State University

Volume 41, July 13, 2006 - June 14, 2007

Lanthorn is Grand Valley State's student newspaper, published from 1968 to the present.

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Observation And Tracking Of Tropical Cyclones Using Resolution Enhanced Scatterometry, Richard Ryan Halterman Dec 2006

Observation And Tracking Of Tropical Cyclones Using Resolution Enhanced Scatterometry, Richard Ryan Halterman

Theses and Dissertations

The QuikSCAT scatterometer provides global daily coverage of oceanic near-surface vector winds. Recently, algorithms have been developed to enhance the spatial resolution of QuikSCAT winds from 25~km to 2.5~km posting. These ultra-high resolution winds are used, in comparison with standard L2B data product winds, to observe and track tropical cyclones. Resolution enhanced winds are found to provide additional storm structure such as inner core size and structure and the presence of multiple eyewalls compared with standard resolution winds. The 2.5~km winds are also able to observe storms nearer to the shore than 25~km winds. An analysis of circulation center locatability …

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Practical Implementation And Performance Analysis On Security Of Sensor Networks, Nidhi Verma Dec 2006

Practical Implementation And Performance Analysis On Security Of Sensor Networks, Nidhi Verma

Theses

A wireless sensor network (WSN) is a network made of thousands of sensing elements called as nodes with wireless capabilities. Their application is varied and diverse ranging from military to domestic and household. As the world of self-organizing sensor networks tip to the edge of maximum utilization, their wider deployment is adding pressure on the security front. Powerful laptops and workstations make it more challenging for small sensors. In addition, there are many security challenges in WSN, e.g- confidentiality, authentication, freshness, integrity etc. Contributions of this work are as follows: “Symmetric” security implementation: This thesis work designs a symmetric-key based …

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Graphical Microcode Simulator With A Reconfigurable Datapath, Brian Vanburen Dec 2006

Graphical Microcode Simulator With A Reconfigurable Datapath, Brian Vanburen

Theses

Microcode is a symbolic way to simplify control design that allows changing, testing and updating the control unit of processors. By changing the microcode, the same datapath can be used for an entirely different application, such as supporting a completely different instruction set. For these reasons, a majority of control units in modern day processors are microcoded. The object was to investigate and implement a graphical microcode simulator with a reconfigurable datapath and microcode format. By allowing a wide configuration of the datapath, many types of logical processors can be designed and simulated. The resulting implemented simulator is able to …

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Realizing Privacy-Preserving Features In Hippocratic Databases, Yasin Laura-Silva, Walid G. Aref Dec 2006

Realizing Privacy-Preserving Features In Hippocratic Databases, Yasin Laura-Silva, Walid G. Aref

Department of Computer Science Technical Reports

No abstract provided.

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Murray Ledger And Times, December 11, 2006, Murray Ledger And Times Dec 2006

Murray Ledger And Times, December 11, 2006, Murray Ledger And Times

The Murray Ledger & Times

No abstract provided.

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Perfluoroalkyl (Aryl) Sulfonimide Zwitterions, Hua Mei Dec 2006

Perfluoroalkyl (Aryl) Sulfonimide Zwitterions, Hua Mei

All Dissertations

This research focuses on superacid perfluoroalkyl(aryl) sulfonimides and their derivatives as a source of stable zwitterionic salts. The strong resonance stabilization of sulfonimides imparts unexpected stability to the zwitterions.
Two types of zwitterions were investigated. The first are symmetrical diaryliodonium zwitterions (DZs) as potential photo acid generators (PAGs) for microlithography. Driven by the demand for smaller feature sizes in the microelectronics industry, microlithography using shorter wavelength light has evolved and new PAGs are of interest. New DZs are potentially useful because they have good thermal stability and may be structurally modified to alter their spectral absorption characteristics. As an extension …

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Tribological Systems For The Evaluation Of Supercritical Carbon Dioxide Sterilized Ultra-High Molecular Weight Polyethylene, John Desjardins Dec 2006

Tribological Systems For The Evaluation Of Supercritical Carbon Dioxide Sterilized Ultra-High Molecular Weight Polyethylene, John Desjardins

All Dissertations

Polymeric biomaterials are especially susceptible to changes in mechanical and surface material properties as a result of sterilization processes that involve heat, moisture and/or irradiation. This is problematic for polymeric materials used in total joint replacement bearings, as these constructs must retain their superior mechanical and tribological properties over their expected 10-20 years of implantation. A younger more active patient population has now exacerbated this longevity issue with service lifetimes of 20+ years now being expected. Supercritical phase carbon dioxide (SC-CO2) is an industrial solvent that has shown great promise as a sterilizing agent in the food industry. Recently, SC-CO2 …

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Nonlinear Control Techniques For Robot Manipulators, Nitendra Nath Dec 2006

Nonlinear Control Techniques For Robot Manipulators, Nitendra Nath

All Theses

This Masters thesis describes the design and implementation of control strategies for the following topics of research: i) Whole Arm Grasping Control for Redundant Robot Manipulators, ii) Neural Network Grasping Controller for Continuum Robots and, iii) Coordination Control for Haptic and Teleoperator Systems.

An approach to whole arm grasping of objects using redundant robot manipulators is presented. A kinematic control which facilitates the encoding of both the end-effector position, as well as body self-motion positioning information as a desired trajectory signal for the manipulator joints is developed.

An approach is presented to whole arm grasping control for continuum robots. The …

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Simulation And Characterization Of Tire Nonuniformity-Induced Steering Nibble Vibrations Through Integrated Subsystems Modeling, Derek Mangun Dec 2006

Simulation And Characterization Of Tire Nonuniformity-Induced Steering Nibble Vibrations Through Integrated Subsystems Modeling, Derek Mangun

All Theses

Periodic force variations produced by nonuniform tire/wheel assemblies are known root causes of torsional steering wheel vibrations known as 'nibble'. Previous studies have sought to investigate this issue through modeling or experimentation involving the entire vehicle or specific subsystems, however a direct link between objectively measured tire force variations and the vibration levels perceived by vehicle occupants has yet to be established. Analytical models of a nonuniform tire, double-wishbone suspension system, and rack and pinion steering system are sourced from literature and integrated into a single subsystem-level model validated against experimental data obtained as part of a collaborative effort. The …

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Best Practices For Developing The Engineer's Estimate, Karl Niedzwecki Dec 2006

Best Practices For Developing The Engineer's Estimate, Karl Niedzwecki

All Theses

The research project 'Best Practices for Developing the Engineering Estimate' was executed by Clemson University on behalf of the South Carolina Department of Transportation (SCDOT). The primary objective of this research project was to investigate the strengths and weaknesses of two types of estimating methods being utilized today by state department of transportations (DOT) nationwide. These two types of estimating methods are the unit cost line item approach, which the SCDOT utilizes, and the cost-based estimating approach. This research report identifies accuracy obtained, resources expended, and methodologies utilized when implementing either type of estimating approach. This was done so the …

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Fall Commencement Program, December 9, 2006, Coastal Carolina University Dec 2006

Fall Commencement Program, December 9, 2006, Coastal Carolina University

Commencement Programs

Program of Commencement Exercises at Coastal Carolina University.

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Fall 2006 Commencement - The University Of Texas Of The Permian Basin, The University Of Texas Permian Basin Dec 2006

Fall 2006 Commencement - The University Of Texas Of The Permian Basin, The University Of Texas Permian Basin

UTPB Commencement Programs

Fall 2006 Commencement - December 9, 2006

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South Dakota State University Graduation Exercises, December 9, 2006, Brookings, South Dakota, South Dakota State University Dec 2006

South Dakota State University Graduation Exercises, December 9, 2006, Brookings, South Dakota, South Dakota State University

Commencement Programs

Please be advised that the names listed in the program do not constitute official confirmation of meeting the graduation requirements. The Graduation Exercises ceremony will commence with introductions by University President Peggy Gordon Miller. Honorary marshals for the occasion are Dr. David Hilderband, Dean of Graduate School, Research and Sponsored Programs, and Professor Emeritus of Chemistry, along with Mary J. Perpich, Associate Professor Emerita of Journalism and Mass Communication. Delivering the graduation address titled "Rights, Privileges, and Responsibilities Pertaining Thereto" will be Dr. Steve R. Marquardt, Dean of Libraries. Dr. Carol J. Peterson, Provost and Vice President of Academic Affairs, …

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12/09/2006 Obituary Records, Hawaii Obituaries Dec 2006

12/09/2006 Obituary Records, Hawaii Obituaries

Obituaries

List of Obituaries for individuals who passed away on 12/09/2006. Scroll down to see the names and obituary description.

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December 9, 2006 (Pages 7407-7522), Pennsylvania Legislative Reference Bureau Dec 2006

December 9, 2006 (Pages 7407-7522), Pennsylvania Legislative Reference Bureau

Volume 36 (2006)

No abstract provided.

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Selecting Keyword Search Terms In Computer Forensics Examinations Using Domain Analysis And Modeling, Alfred Christopher Bogen Dec 2006

Selecting Keyword Search Terms In Computer Forensics Examinations Using Domain Analysis And Modeling, Alfred Christopher Bogen

Theses and Dissertations

The motivation for computer forensics research includes the increase in crimes that involve the use of computers, the increasing capacity of digital storage media, a shortage of trained computer forensics technicians, and a lack of computer forensics standard practices. The hypothesis of this dissertation is that domain modeling of the computer forensics case environment can serve as a methodology for selecting keyword search terms and planning forensics examinations. This methodology can increase the quality of forensics examinations without significantly increasing the combined effort of planning and executing keyword searches. The contributions of this dissertation include: ? A computer forensics examination …

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Multiscale Structure-Function Relations Of A Tendon, Lakiesha Nicole Williams Dec 2006

Multiscale Structure-Function Relations Of A Tendon, Lakiesha Nicole Williams

Theses and Dissertations

In 1998, the United States National Committee on Biomechanics (USNCB) established an evolving discipline called Functional Tissue Engineering (FTE). In establishing this discipline, the goals of the USNCB were to advance FTE by increasing awareness among tissue engineers about the importance of restoring function when engineering tissue constructs. Another goal was to encourage tissue engineers to incorporate these functional criteria in the design, manufacturing and optimization of tissue engineered constructs. Based on this motivation, an investigation of the structure and mechanical properties of the rabbit patellar tendon will be executed, with the ultimate goal of creating a multiscale soft tissue …

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Grout Impregnation Of Pre-Placed Recycled Concrete Pavement (Rcp) For Rapid Repair Of Deteriorated Portland Cement Concrete Airfield Pavements, Travis A. Mann Dec 2006

Grout Impregnation Of Pre-Placed Recycled Concrete Pavement (Rcp) For Rapid Repair Of Deteriorated Portland Cement Concrete Airfield Pavements, Travis A. Mann

Theses and Dissertations

The U.S. military must have the ability to rapidly deploy troops and equipment anywhere in the world as part of a contingency operation. Recent military operations have highlighted the critical need for rapid repair procedures and materials for military use on sub-standard, in-theater airfields. The U.S. Army Corps of Engineers, Engineer Research and Development Center is currently addressing these problems through a program titled ?Joint Rapid Airfield Construction?. This study involves the development of a method using rapid setting grouts and recycled concrete pavement (RCP) to repair portland cement concrete (PCC) pavements. A laboratory study was conducted to evaluate material …

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Single-Step Treatment Of 2,4-Dinitrotoluene Via Zero-Valent Metal Reduction And Chemical Oxidation, J. Mathew Thomas Dec 2006

Single-Step Treatment Of 2,4-Dinitrotoluene Via Zero-Valent Metal Reduction And Chemical Oxidation, J. Mathew Thomas

Theses and Dissertations

Many nitroaromatic compounds (NACs) are considered toxic and potential carcinogens. The purpose of this study was to develop an integrated reductive/oxidative process for treating NAC contaminated waters. The process consists of the combination of zero-valent manganese or iron and a hydroxyl radical based treatment technique. Corrosion promoters were added to the contaminated water to minimize passivation of the metallic species. Water contaminated with 2,4-dinitrotoluen (DNT) was treated with the integrated process using a recirculating batch reactor. It was demonstrated that addition of corrosion promoters to the contaminated water enhanced the rate of reaction of 2,4-DNT with zero-valent iron or manganese. …

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Rans And Hybrid Rans/Les Computations For Three-Dimensional Wings With Ice Accretion, Mithun Varma Mankada Covilakom Dec 2006

Rans And Hybrid Rans/Les Computations For Three-Dimensional Wings With Ice Accretion, Mithun Varma Mankada Covilakom

Theses and Dissertations

Computational investigations were carried out to evaluate the effectiveness and usability of hybrid RANS/LES techniques for predicting the unsteady separated flow over wings with ice accretion. RANS and hybrid RANS/LES computations were performed using the viscous flow solver CHEM with the SST turbulence model. Two configurations were considered during the study: an extruded wing with a glaze-ice shape and a swept wing with a simulated glaze-ice accretion. Hybrid RANS/LES results, in general, predict a less active shear layer ``roll up' than seen in the experimental data. Qualitative improvements are seen in the hybrid RANS/LES results over corresponding RANS results. The …

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Commencement Convocation Exercises - December 9th 2006, Prairie View A&M University Dec 2006

Commencement Convocation Exercises - December 9th 2006, Prairie View A&M University

Commencement and Convocation Exercises

No abstract provided.

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Development And Validation Of A Control Strategy For A Parallel Hybrid (Diesel-Electric) Powertrain, Jimmy C. Mathews Dec 2006

Development And Validation Of A Control Strategy For A Parallel Hybrid (Diesel-Electric) Powertrain, Jimmy C. Mathews

Theses and Dissertations

The rise in overall powertrain complexity and the stringent performance requirements of a hybrid electric vehicle (HEV) have elevated the role of its powertrain control strategy to considerable importance. Iterative modeling and simulation form an integral part of the control strategy design process and industry engineers rely on proprietary ?legacy? models to rapidly develop and implement control strategies. However, others must initiate new algorithms and models in order to develop production-capable control systems. This thesis demonstrates the development and validation of a charge-sustaining control algorithm for a through-the-road (TTR) parallel hybrid (diesel-electric) powertrain. Some unique approaches used in powertrain-level control …

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Development Of Power Flow With Distributed Generators And Reconfiguration For Restoration Of Unbalanced Distribution Systems, Sarika Khushalani Dec 2006

Development Of Power Flow With Distributed Generators And Reconfiguration For Restoration Of Unbalanced Distribution Systems, Sarika Khushalani

Theses and Dissertations

With the increasing interest in distribution automation, distribution power flow is important for applications like VAR planning, switching, state estimation and especially optimization. Typically, a distribution system originates at a substation and continues to a lower voltage for delivery to the customers. There are several tools for transmission system analysis. These tools include Newton Raphson, Gauss Seidel and fast decoupled techniques. These techniques however sometimes fail to converge when applied to distribution systems due to their higher resistance/reactance (R/X) ratio of the lines, making them ill conditioned. Distribution systems typically have a radial topological structure where the loads are not …

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Study Of Lunar Constellations For Situational Awareness And Surveillance, Devon Sanders Dec 2006

Study Of Lunar Constellations For Situational Awareness And Surveillance, Devon Sanders

Theses and Dissertations

Lunar constellations providing the capabilities of situational awareness and surveillance for future mission operators are analyzed in this study. The use of specialty orbits, such as sun-synchronous and frozen orbits, are analyzed to determine the applicability of these unique orbits. Additionally, altitude and inclination trades are performed to determine the degree to which mission objectives are achieved through ranges of these orbital parameters. Using the analyzed orbits, constellations of varying patterns are developed and surface coverage figures of merit are used to evaluate them. The research concludes with calculation of the yearly cross-track and in-track stationkeeping costs of a representative …

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Real-Time Vehicle Performance Monitoring With Data Integrity, William George Jenkins Dec 2006

Real-Time Vehicle Performance Monitoring With Data Integrity, William George Jenkins

Theses and Dissertations

A cornerstone of next generation intelligent transportation systems (ITS) is a seamless integration of in-vehicle networking with existing wireless telephony infrastructure. Remote access to on-board diagnostics and performance data is a crucial requirement for ITS. This thesis investigated the performance benefits of a data integrity buffering technique for an extensible vehicle position and performance tracking system (VPPTS). In support of this investigation, a VPPTS prototype was developed. The prototype used available technologies and interfaces to industry-standard communications channels and is a demonstration of a next-generation intelligent transportation system (ITS). The data integrity buffering technique under investigation was shown to provide …

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Commencement Speech December 2006, Prairie View A&M University Dec 2006

Commencement Speech December 2006, Prairie View A&M University

President Emeritus George C. Wright Speeches

No abstract provided.

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Multi-Agent Based Control And Reconfiguration For Restoration Of Distribution Systems With Distributed Generators, Jignesh M. Solanki Dec 2006

Multi-Agent Based Control And Reconfiguration For Restoration Of Distribution Systems With Distributed Generators, Jignesh M. Solanki

Theses and Dissertations

Restoration entails the development of a plan consisting of opening or closing of switches, which is called reconfiguration. This dissertation proposes the design of a fast and efficient service restoration with a load shedding method for land-based and ship systems, considering priority of customers and several other system operating constraints. Existing methods, based on centralized restoration schemes that require a powerful central computer, may lead to a single point of failure. This research uses a decentralized scheme based on agents. A group of agents created to realize a specific goal by their interactions is called a Multi-Agent System (MAS). Agents …

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Hybrid Electric Vehicle Modeling In Generic Modeling Environment, Shravana Kumar Musunuri Dec 2006

Hybrid Electric Vehicle Modeling In Generic Modeling Environment, Shravana Kumar Musunuri

Theses and Dissertations

The Hybrid Electric Vehicle (HEV) is a complex electromechanical system with complex interactions among various components. Due to the large number of design variables involved, the design flexibility in the HEV makes performance studies difficult. As the system complexity and sophistication increases, it becomes much more difficult to predict these interactions and design the system accordingly. Also, different variations in the design and manufacture of various components and systems involve a large amount of work and cost to keep updated of all these variations. While the above issues ask for a flexible design environment suitable for vehicle design, most of …

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