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2006

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An Approach To Estimate Object Depth From A Visual Projection Scene For Eye-In-Hand Robot Applications ., Walladin K. Said, Ghassan A. Al-Kindi, Hussam K. Abdulameer Dec 2006

An Approach To Estimate Object Depth From A Visual Projection Scene For Eye-In-Hand Robot Applications ., Walladin K. Said, Ghassan A. Al-Kindi, Hussam K. Abdulameer

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In this paper, an indirect field-oriented control (IFOC) induction machine drive with a conventional PI and sliding mode controllers is presented. The robustness of ac machine drive speed performance with these controllers is checked in terms of variation of machine parameters. The design includes rotor speed estimation from measured stator terminal Voltages and currents. The estimated speed is used as feedback in an indirect vector control system, such that the speed control is performed without the use of shaft mounted transducers. The high performance of the proposed control schemes under load disturbances is studied via simulation cases. The components of …

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Application Of A Statistical Zonation Technique To Granny Creek Field In West Virginia, Venkata Kristamsetty Dec 2006

Application Of A Statistical Zonation Technique To Granny Creek Field In West Virginia, Venkata Kristamsetty

Graduate Theses, Dissertations, and Problem Reports (ETD)

The significance of dividing the sedimentary intervals into flow units reflects groups of rocks that has similar geologic, physical properties and depositional environment that affect fluid flow. Variations in rock properties result from depositional, diagenetic and post-depositional changes. A flow unit is a volume of a reservoir rock that is continuous laterally and vertically and has similar averages of those rock properties that affect fluid flow.;In this study, a statistical zonation technique developed by Testerman to identify and describe naturally occurring zones in a reservoir is applied to Granny Creek field in West Virginia. This technique is particularly useful in …

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Forecasting Truck Traffic Growth At West Virginia Non-Interstate Highways, Sundeep Gopisetty Dec 2006

Forecasting Truck Traffic Growth At West Virginia Non-Interstate Highways, Sundeep Gopisetty

Graduate Theses, Dissertations, and Problem Reports (ETD)

Reliable estimates of truck volumes are important in transportation planning and design applications, such as pavement design and management. This study evaluates different statistical methods based on their accuracy and data requirements, to calculate the truck growth rates by developing statistical models. Nine years of data from 1995 to 2003 was used to develop these models for calculating the truck growth rates at non-interstate highways of West Virginia. The literature review and the current practices for the state DOT was conducted to better understand and select the different forecasting methods that could be applicable to the given data. As a …

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Finite Element Analysis Of Long-Term Performance Of Buried High Density Polyethylene Pipes, Raj Kumar Gondle Dec 2006

Finite Element Analysis Of Long-Term Performance Of Buried High Density Polyethylene Pipes, Raj Kumar Gondle

Graduate Theses, Dissertations, and Problem Reports (ETD)

Buried pipes are utilized for various applications such as sewers, water conveyance, and highway drainage systems. Advantages such as lightweight, ease of installation, low cost, higher impact strength and durability have resulted in the extensive use of High Density Polyethylene (HDPE) pipes during the past few years. Time dependent properties such as creep associated with HDPE material may reduce the expected design life of high density polyethylene pipes under field conditions. The objective of this research work was to investigate the time dependent nature of buried high density polyethylene pipes using the finite element analysis. The influence of trench width …

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One-Dimensional Computer Modeling Of Electrical Conductivity Through Methane And Synthesis Gas Flames, Jonathan Patrick Lilly Dec 2006

One-Dimensional Computer Modeling Of Electrical Conductivity Through Methane And Synthesis Gas Flames, Jonathan Patrick Lilly

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this work has been to produce and test simulation software to accurately model the effects of charged species and applied electric fields on the current conducted through methane and methane-doped synthesis gas flames. Comparison with existing experimental data generated at NETL has been conducted on a variety of published reaction mechanisms.

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Efficient Simulation Of Communication Systems On A Desktop Grid, Raja Sekhar Katuri Dec 2006

Efficient Simulation Of Communication Systems On A Desktop Grid, Raja Sekhar Katuri

Graduate Theses, Dissertations, and Problem Reports (ETD)

Simulation is an important part of the design cycle of modern communication systems. As communication systems grow more sophisticated, the computational burden of these simulations can become excessive. The need to rapidly bring systems to market generally precludes the use of a single computer, and drives a demand for parallel computation. While this demand could be satisfied by the development of dedicated infrastructure, a more efficient option is to harness the unused computational cycles of underutilized desktop computers located throughout the organization.;In this thesis, a new paradigm for parallelizing communication simulations is proposed and developed. A desktop grid is created …

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Factors Of Effectiveness In Kentucky Nonprofit Social Welfare Organizations., Peggy Proudfoot-Mcguire Dec 2006

Factors Of Effectiveness In Kentucky Nonprofit Social Welfare Organizations., Peggy Proudfoot-Mcguire

Electronic Theses and Dissertations

This dissertation is an exploratory, mixed methods study using grounded perspective to examine how stakeholders (including consumers, administrators, and practitioners) in social welfare organizations perceive effectiveness in the nonprofit social welfare sector. Focus groups were held in eight regions constituting the Area Health Education Centers (AHEC) in Kentucky. A total of 25 people participated in the study. A theoretical framework of nonprofit social welfare organizational effectiveness emerged from the data indicating that the five most significant factors identified by stakeholders as constituting effectiveness in the nonprofit social welfare sector in Kentucky were (a) client services, (b) organizational structure © workplace …

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Robust Estimation Of Mahalanobis Distance In Hyperspectral Images, Eduardo C. Meidunas Dec 2006

Robust Estimation Of Mahalanobis Distance In Hyperspectral Images, Eduardo C. Meidunas

Theses and Dissertations

This dissertation develops new estimation methods that fit Johnson distributions and generalized Pareto distributions to hyperspectral Mahalanobis distances. The Johnson distribution fit is optimized using a new method which monitors the second derivative behavior of exceedance probability to mitigate potential outlier effects. This univariate distribution is then used to derive an elliptically contoured multivariate density model for the pixel data. The generalized Pareto distribution models are optimized by a new two-pass method that estimates the tail-index parameter. This method minimizes the mean squared fitting error by correcting parameter values using data distance information from an initial pass. A unique method …

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Vacuum Chamber Construction And Contamination Study Of A Micro Pulsed Plasma Thruster, Jacob H. Debevec Dec 2006

Vacuum Chamber Construction And Contamination Study Of A Micro Pulsed Plasma Thruster, Jacob H. Debevec

Theses and Dissertations

The micro pulsed plasma thruster (micro-PPT) is a simple and versatile electric thruster capable of performing multiple missions, from precise attitude control on standard satellites to primary propulsion for nanosatellites. In order to fill this role as both industry and government move toward utilizing smaller satellites, micro-PPTs first need to be thoroughly tested on the ground. This study examines the deposition profile and rate of particle emission from the thruster so that satellite designers understand any potential contamination issues with sensitive instruments and solar panels. Employing a newly assembled vacuum chamber system, four tests were completed with the micro-PPTs, and …

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An Exploration Of Several Structural Measurement Techniques For Usage With Functionally Graded Materials, Robert A. Reuter Dec 2006

An Exploration Of Several Structural Measurement Techniques For Usage With Functionally Graded Materials, Robert A. Reuter

Theses and Dissertations

Titanium / titanium boride functionally graded 6"x 1"x1" beams were subjected to a four-point beam test in order to critique the value of several measurement techniques. Also, finite element analysis results were compared with experimental values and general observations about the experiment were recorded. Uniform 85% TiB /15% Ti and uniform commercially pure titanium specimens were also subjected to the same loading conditions as a control. Techniques used include digital image correlation, fiber optic strain gauging, strain gauging, and differential infrared thermography techniques. The strain data results were compared with one another and to linear finite element models. It was …

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Integrated Conceptual Design Of Joined-Wing Sensor Craft Using Response Surface Models, Josh E. Dittmar Dec 2006

Integrated Conceptual Design Of Joined-Wing Sensor Craft Using Response Surface Models, Josh E. Dittmar

Theses and Dissertations

A multidisciplinary conceptual design and analysis of Boeing's joined-wing SensorCraft has been conducted. This analysis was completed using geometrical optimization, aerodynamic analyses, and response surface methodology on a composite structural model. Phoenix Integration's Model Center was used to integrate the sizing and analysis codes found in Raymer's text, "Aircraft Design: A Conceptual Approach" as well as those from the NASA derived conceptual design tool AirCraft Synthesis (ACSYNT), and a modified Boeing Finite Element Model (FEM). This research demonstrated the utility of integrated low-order models for fast and inexpensive conceptual modeling of unconventional aircraft designs.

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Public Engagement To Prioritize The Pastoral Research Agenda At The Pastoral And Agro-Pastoral Research Center Of Oari In Ethiopia, D. Layne Coppock, Getachew Gebru, Lemma Gizachew, Sintayehu Mesele, Mohammed Hassena, Solomon Desta Dec 2006

Public Engagement To Prioritize The Pastoral Research Agenda At The Pastoral And Agro-Pastoral Research Center Of Oari In Ethiopia, D. Layne Coppock, Getachew Gebru, Lemma Gizachew, Sintayehu Mesele, Mohammed Hassena, Solomon Desta

Environment and Society Faculty Publications

The Oromia Agricultural Research Institute (OARI) has a mandate to conduct agricultural and livestock research throughout the Regional State of Oromia in Ethiopia. OARI has recently opened a facility near Yabello town on the Borana Plateau called the Pastoral and Agro-Pastoral Research Center. A meeting was held in August 2006 at Yabello that involved representatives from pastoral communities, the private sector, government, and non-governmental organizations. The aim was to engage stakeholders in a process of problem prioritization and set the stage to create new partnerships to better address pressing problems. The final priorities included: addressing a general decline in forage …

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Effect Of Decarburization On Microstructure Of Dc-Plasma Nitrided H 13 Tool Steel, P Visuttipitukul, C Paa-Rai, K Hideyuki Dec 2006

Effect Of Decarburization On Microstructure Of Dc-Plasma Nitrided H 13 Tool Steel, P Visuttipitukul, C Paa-Rai, K Hideyuki

Journal of Metals, Materials and Minerals

Decarburization may occur during heat treatment of H13 steel resulting in carbon deficiency near the specimen surface. Microstructures and properties of H13 tool steel after surface treatment such as plasma nitriding can be affected by decarburization. This study is focused on the microstructure of plasma nitrided H13 steel. Decarburized and non-decarburized H13 steel was plasma nitrided for 36-72 ks at temperatures varying from 773 to 823 K. The microstructure of the plasma nitrided layer was analyzed by an optical microscope and Electron Probe Micro Analysis (EPMA). The thickness of the nitriding layer is measured. The microstructures of the decarburized and …

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Techniques To Improve Coating Adhesion Of Superhard Coatings, N Panich, P Wangyao, N Vattanaprateep, S Yong Dec 2006

Techniques To Improve Coating Adhesion Of Superhard Coatings, N Panich, P Wangyao, N Vattanaprateep, S Yong

Journal of Metals, Materials and Minerals

This work addresses the development of different techniques in fabricating TiB2 coatings with increased adhesion to the substrate and with retained high hardness. Titanium diboride (TiB2) coatings were deposited on high-speed steel substrates by magnetron sputtering of a TiB2 target. Attempts to enhance the coating adhesion to the substrate of the TiB2 coatings by controlling the deposition conditions and parameters are presented, such as effect of substrate rotation; annealing temperature; using deposited Cr as an interlayer material and Ti/TiB2 multilayer system. The structure of the coatings was examined by X-ray diffraction, field-emission scanning electron microscopy, and atomic force microscopy. The …

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"I Think We Never Looked At A Financial Analysis" : Making Sense Of Resource Allocation Decisions In Technical Innovation In The Durable Consumer Goods Industry, Martin Zummersch Dec 2006

"I Think We Never Looked At A Financial Analysis" : Making Sense Of Resource Allocation Decisions In Technical Innovation In The Durable Consumer Goods Industry, Martin Zummersch

Student Scholarship

The purpose of this research study was to investigate how practitioners' of the durable consumer goods industry make resource allocation decisions in technical innovation, in an industry shaped by high uncertainty and low barriers to entry. Few studies have been conducted that generated qualitative data that allowed for comparisons between prescriptive models and the actual lived-world experiences of practitioners. During the investigation we conducted interviews with executives of the industry that allowed us to better understand how practitioners derived at decisions and why certain organizations were able to innovate more successfully than others. This analysis leveraged the theories of the …

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Enabling Trust And Performance In Distributed Collaborative Teams, Eugene A. Pierce Dec 2006

Enabling Trust And Performance In Distributed Collaborative Teams, Eugene A. Pierce

Student Scholarship

Virtual teams allow organizations to bring together critical contributors who might not otherwise be able to work together due to time, travel and cost restrictions. In addition, virtual teams can enhance the available pool of resources by including people from outside the sponsoring organization, such as consultants, or members of partner organizations. Virtual teams also allow organizations to hire and retain the best people, who may be either unable or unwilling to relocate, and to facilitate dynamic membership changes as a result of changes in project requirements or the unexpected loss of team members. As such they are sometimes unable …

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Ac Conductivity Relaxation Processes In Cacu₃Ti₄O₁₂ Ceramics: Grain Boundary And Domain Boundary Effects, Wei Li, Robert W. Schwartz Dec 2006

Ac Conductivity Relaxation Processes In Cacu₃Ti₄O₁₂ Ceramics: Grain Boundary And Domain Boundary Effects, Wei Li, Robert W. Schwartz

Materials Science and Engineering Faculty Research & Creative Works

The ac conductivity of CaCu₃Ti₄O₁₂ ceramics associated with electrical charge carrier motion (ions or vacancies) was investigated as a function of frequency at different temperatures. The long range migration of charge carriers within the ceramic is restricted by two kinds of insulating barriers, namely, grain boundaries and domain boundaries. The potential barriers associated with these boundaries lead to two anomalies in conductivity response and three frequency-dependent contributions to conductivity: long range diffusion of carriers, carrier migration localized within grains, and carrier migration localized within domains.

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The Murray State News, December 1, 2006, The Murray State News Dec 2006

The Murray State News, December 1, 2006, The Murray State News

Murray State University Collection

No abstract provided.

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Control Of A Stepping Motor Using Neural Network Predictive ., Hazim I. Ali Dec 2006

Control Of A Stepping Motor Using Neural Network Predictive ., Hazim I. Ali

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In this paper, an application of the neural network predictive controller for stepping motor will be presented. This approach has been considered in order to assure high control performance of the system. The advantage of this type of control with respect to the classical PID controller will be illustrated. In the neural network predictive control approach the model of the system to be controlled is first determined in a system identification phase. The system model is used to predict future behavior of the system, and an optimization algorithm is used to select the control input that optimizes future performance.

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Bite Rate And Losses Limitations In Single Mode Fiber ., Ali Y. Fatah, Laith A. Almayhi Dec 2006

Bite Rate And Losses Limitations In Single Mode Fiber ., Ali Y. Fatah, Laith A. Almayhi

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In a WDM system a laser with only one line in its spectrum is needed, so the linewidth of laser must be specified. The required linewidth will depend on the number of channels and bit rate in the proposed system. In general the narrower the linewidth the better but this will usually be a cost/benefit tradeoff. In this paper the limitations of bit rate and losses in single mode fiber are studied, and propose the perfect limitation that is used in the optical design. All simulation was implemented using programs written in MALTAB 7.

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Xilinx Fpga Implementation Of Arithmetic Logic Shift Unit (Alsu) ., Raghad Z. Tawfeeq Dec 2006

Xilinx Fpga Implementation Of Arithmetic Logic Shift Unit (Alsu) ., Raghad Z. Tawfeeq

Iraqi Journal of Computers, Communications, Control and Systems Engineering

A Field Programmable Gate Array (FPGA) is a digital integrated circuit that can be programmed to do any type of digital function. This paper represents how to map the arithmetic logic shift unit (ALSU) to the Xilinx FPGA Chip. The ALSU the VHDL hardware architecture was captured through the use of description language. Xilinx Integrated Software Environment ISE 6.i (project navigator) CAD software package was used to synthesize and implement the architecture of the ALSU to the FPGA chip. The architecture was functionally and performance validated through the package software simulation via post-synthesis and post-implementation software simulations.

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Investigation Of The Band Structures And Optical Properties Of Super Lattices, Sheikha Ahmed Awad Alnaeme Dec 2006

Investigation Of The Band Structures And Optical Properties Of Super Lattices, Sheikha Ahmed Awad Alnaeme

Theses

Group III nitrides are highly attractive materials because of their great potential for the development of optoelectronic devices in short wavelength, semiconductor lasers and optical light-emitters and detectors. GaN, AlN and InN are considered as the most important compounds in this class of materials. In this work, we present a theoretical investigation of the electronic properties (band structure, density of state and contour maps of the charge density distribution) and optical properties (refractive index, absorption and dielectric constants). Also, we investigate the band structures and optical properties of AlN/GaN and InN/GaN super lattices. A full-potential linearized plane-wave (FPLAPW) method is …

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Managing News In A Managed Media: Mediating The Message In Malaysiakini.Com, Augustine Pang Dec 2006

Managing News In A Managed Media: Mediating The Message In Malaysiakini.Com, Augustine Pang

Research Collection Lee Kong Chian School Of Business

Widely regarded as an anomaly in the neo-authoritarian system in Malaysia, Malaysiakini.com is proving that managing an independent media in a government-managed media landscape is more than a Sisyphean struggle. Employing participant observation and interviews, supplemented by artifacts and media accounts, this study seeks to understand the media management of Malaysiakini.com through news management, using Shoemaker and Reese’s (1996) hierarchy of influence model, which posits a framework of internal and external forces that affect news management. The study found determined attempts to minimize ideological influences through media socialization by accentuating on the direct influences, such as the journalists’ role in …

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Barbarians At The Ballot Box: The Use Of Hedging To Acquire Low Cost Corporate Influence And Its Effect On Shareholder Apathy, Jonathan J. Katz Dec 2006

Barbarians At The Ballot Box: The Use Of Hedging To Acquire Low Cost Corporate Influence And Its Effect On Shareholder Apathy, Jonathan J. Katz

Cardozo Law Review

No abstract provided.

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The Proteomics Of N-Terminal Methionine Cleavage, Frédéric Frottin, Aude Martinez, Philippe Peynot, Sanghamitra Mitra, Richard C. Holz, Carmela Giglione, Thierry Meinnel Dec 2006

The Proteomics Of N-Terminal Methionine Cleavage, Frédéric Frottin, Aude Martinez, Philippe Peynot, Sanghamitra Mitra, Richard C. Holz, Carmela Giglione, Thierry Meinnel

Chemistry Faculty Research and Publications

Methionine aminopeptidase (MAP) is a ubiquitous, essential enzyme involved in protein N-terminal methionine excision. According to the generally accepted cleavage rules for MAP, this enzyme cleaves all proteins with small side chains on the residue in the second position (P1′), but many exceptions are known. The substrate specificity of Escherichia coli MAP1 was studied in vitro with a large (>120) coherent array of peptides mimicking the natural substrates and kinetically analyzed in detail. Peptides with Val or Thr at P1′ were much less efficiently cleaved than those with Ala, Cys, Gly, Pro, or Ser in this position. Certain residues …

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Application Of Advanced Computational Modelling In The Numerical Prediction Of The Haemodynamic Impact Of Coronary Stent Implantation, Jonathan Murphy, Fergal Boyle Dec 2006

Application Of Advanced Computational Modelling In The Numerical Prediction Of The Haemodynamic Impact Of Coronary Stent Implantation, Jonathan Murphy, Fergal Boyle

Conference Papers

Coronary stent implantation can improve blood flow in an artery narrowed by the build up of arterial plaque. However, the haemodynamic effect of stent placement is unclear and may influence arterial restenosis (re-blockage). In this investigation the stent induced, non-Newtonian blood flow disturbances have been captured in a three dimensional computational domain. The results clearly show areas of low wall shear stress proximal and distal to the stent wires, a characteristic which is known to encourage restenosis. Furthermore, this computational method of observing the complex haemodynamics of the stent environment can be used in conjunction with medical trial data to …

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Castro's Cuba: Quo Vadis?, Francisco Wong-Diaz Dr. Dec 2006

Castro's Cuba: Quo Vadis?, Francisco Wong-Diaz Dr.

Books, Monographs & Collaborative Studies

The United States, particularly the Army, has a long history of involvement with Cuba. It has included, among others, the Spanish-American War of 1898, military interventions in 1906 and 1912, the 1961 Bay of Pigs Invasion, the 1962 Missile Crisis, counterinsurgency, and low intensity warfare in Latin America and Africa against Cuban supported guerrilla movements. After almost 5 decades of authoritarian one-man rule, Fidel Castro remains firmly in power. On July 31, his brother, Raul Castro, assumed provisional presidential power after an official announcement that Fidel was ill and would undergo surgery. What would be the strategic and political implications …

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Observation Of Fano Asymmetry In Raman Spectra Of Srtio3 And Cax Sr1-Xtio3 Perovskite Nanocubes, Sarbajit Banerjee, Dae In Kim, Richard D. Robinson, Irving P. Herman, Yuanbing Mao, Stanislaus S. Wong Dec 2006

Observation Of Fano Asymmetry In Raman Spectra Of Srtio3 And Cax Sr1-Xtio3 Perovskite Nanocubes, Sarbajit Banerjee, Dae In Kim, Richard D. Robinson, Irving P. Herman, Yuanbing Mao, Stanislaus S. Wong

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

Bulk SrTi O3 is cubic and not expected to exhibit any first-order Raman scattering. However, nanocubes of SrTi O3 with an edge length of 80±10 nm show strong first-order Raman scattering originating from the breaking of symmetry caused by frozen surface dipoles (local tetragonality) and the presence of nanoscopic polar domains (arising from incorporated impurities). Rapid polarization fluctuations within these nanoscopic ferroelectric regions interfere with a polar phonon, resulting in a Fano-like asymmetric line shape in these SrTi O3 nanocubes, as well as in Ca0.3 Sr0.7 Ti O3 nanocubes.

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Weakly Positive Urine Pregnancy Diagnostic Test Rate:A Study On Laboratory Incidence, P. Ekawong, V. Wiwanitkit Dec 2006

Weakly Positive Urine Pregnancy Diagnostic Test Rate:A Study On Laboratory Incidence, P. Ekawong, V. Wiwanitkit

Chulalongkorn Medical Journal

No abstract provided.

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Designing Web Sites For Customer Loyalty Across Business Domains: A Multilevel Analysis, S. Mithas, Narayanasamy Ramasubbu, M. S. Krishnan, C. Fornell Dec 2006

Designing Web Sites For Customer Loyalty Across Business Domains: A Multilevel Analysis, S. Mithas, Narayanasamy Ramasubbu, M. S. Krishnan, C. Fornell

Research Collection School Of Computing and Information Systems

Web Sites are important components of Internet strategy for organizations. This paper develops a theoretical model for understanding the effect of Web site design elements on customer loyalty to a Web site. We show the relevance of the business domain of a Web site to gain a contextual understanding of relative importance of Web site design elements. We use a hierarchical linear modeling approach to model multilevel and cross-level interactions that have not been explicitly considered in previous research. By analyzing, data on more than 12,000 online customer surveys for 43 Web sites in several business domains, we find that …

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