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2004

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An Architecture Design For A Real-Time Web-Based Visualization In The Grid Environment, Bhargavi Sura Dec 2004

An Architecture Design For A Real-Time Web-Based Visualization In The Grid Environment, Bhargavi Sura

Theses and Dissertations

Situations like war, terrorist attacks, fire accidents, floods, storms, etc., which threaten human life and property, demand immediate action to decrease the damage caused by them. A system is needed that predicts the future events based on what has happened and notifies the concerned personnel. The situation could be better understood in less time if the data is represented as colored, shaded and moving images rather than as numbers. Such a system requires a real-time Web-based visualization system with easy and secure access to grid resources, presenting easy-to-read graphics through a simple interface provided by a Web browser, and responding …

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An In Vitro Evaluation Of Chitosan As A Biomaterial Focusing On The Effects Of The Degree Of Deacetylation, Virginia Hamilton Dec 2004

An In Vitro Evaluation Of Chitosan As A Biomaterial Focusing On The Effects Of The Degree Of Deacetylation, Virginia Hamilton

Theses and Dissertations

The material characteristics play a role in the suitability of chitosan for biomedical applications. This is not surprising since the degree of deacetylation of chitosan influences antimicrobial activity, degradation rate, immune reaction and mechanical properties such as strength and elongation. This study examines chitosans of variable material characteristics for wound and bone healing applications. Chitosan films of 76, 78, 80, 87, 91, 92, and 95% degree of deacetylation were tested in vitro for cellular responses by fibroblast and bone cell lines. The in vitro responses were compared to the material characteristics of molecular weight, degree of deacetylation, swelling index, and …

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A Sliding Interface Method For Unsteady Unstructured Parallel Flow Simulations, Eric Lindsay Blades Dec 2004

A Sliding Interface Method For Unsteady Unstructured Parallel Flow Simulations, Eric Lindsay Blades

Theses and Dissertations

The primary objective of this study is to develop a sliding interface method for simulations involving relative rotational grid motion suitable for unstructured grid topologies. The present method alleviates computationally expensive grid deformation, remeshing, and hole cutting procedures. Rotational motion is accomplished by rigidly rotating a subdomain representing the moving component. At the subdomain interface boundary, the faces along the interfaces are extruded into the adjacent subdomain to create new volume elements and provide a one-cell overlap. These new volume elements close the control volumes for the nodes on the interface surface and allow a flux to be computed across …

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Analysis Of The Design And Operation Of Mix-Bank Resequencing Areas, Arunkumar Subramanian Dec 2004

Analysis Of The Design And Operation Of Mix-Bank Resequencing Areas, Arunkumar Subramanian

Theses and Dissertations

Automotive assembly plants work on a pre-planned job sequence in order to optimize the performance of the assembly line. However, the job sequence becomes scrambled due to factors such as plant layout, process design, variability and uncertainty. Assembly plants use either a mix-bank or an automatic storage and retrieval system to regenerate the sequence before final assembly. A mix-bank, which is a set of parallel lanes, is the most common method used in the automotive industry to reconstruct the sequence. Only the first vehicles on the lanes are available for sequencing in a mix-bank set-up. Hence the lane selection policy …

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Development Of A Distributed Model For The Biological Water Processor Of The Water Recovery System For Nasa Advanced Life Support Program, Sachin Vishwas Puranik Dec 2004

Development Of A Distributed Model For The Biological Water Processor Of The Water Recovery System For Nasa Advanced Life Support Program, Sachin Vishwas Puranik

Theses and Dissertations

The Water Recovery System (WRS) is one of the necessary subsystems in an Advanced Life Support program. It regenerates potable water by processing wastewater generated on a space shuttle or on a space station. The Biological Water Processor (BWP) is one of the complex subsections of WRS that involves processes described by continuous time as well as discrete event dynamics. Such systems can be modeled as hybrid dynamical systems in MATLAB/Stateflow. The following state variables of the BWP have been simulated in MATLAB: Pressure drop across Organic Carbon Oxidation Reactor (OCOR), Pressure drop across nitrification reactor, nitrifier flow rate, total …

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Commencement Convocation Exercises - December 2004, Prairie View A&M University Dec 2004

Commencement Convocation Exercises - December 2004, Prairie View A&M University

Commencement and Convocation Exercises

No abstract provided.

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2004-12-11 Minutes & Appendices, Longwood University Dec 2004

2004-12-11 Minutes & Appendices, Longwood University

Board of Visitors Meeting Minutes 1964-

No abstract provided.

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Hawks' Herald - December 11, 2004, Roger Williams University Dec 2004

Hawks' Herald - December 11, 2004, Roger Williams University

Hawk's Herald

No abstract provided.

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Towards A Methodology For Interactive Virtual Design Assessment, Kang Li Dec 2004

Towards A Methodology For Interactive Virtual Design Assessment, Kang Li

Theses and Dissertations

Complex interactive behaviour involves cognitive, sensation and motor behaviour and may consist of several sub interactive behaviours. It needs to be examined from different points of view. Although explaining everything in one model is not currently possible, it is possible to connect information from different sources to get a better understanding of the interaction to benefit product design. The long-term objective of our study is to develop a methodology for interactive virtual design assessment to study the interactive behaviour and achieve compatibility. This study summarized two experiments which covered many aspects of interactive behaviours in seated posture. Experiment one addressed …

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The Creation Of Boron Deep Levels By High Temperature Annealing Of 4h-Sic, Hrishikesh Das Dec 2004

The Creation Of Boron Deep Levels By High Temperature Annealing Of 4h-Sic, Hrishikesh Das

Theses and Dissertations

Creation of semi-insulating layers in SiC is highly desirable for high voltage device fabrication. Specifically PiN diodes can be fabricated with a compensated semi-insulating layer that would be capable of blocking a large reverse voltage. Semi-insulating (SI) behavior in SiC has been traditionally achieved via passivation of shallow dopants with vanadium-related deep levels. Degraded electrical properties of SiC devices result from the use of vanadium compensated SiC because unintentional formation of additional defects due to vanadium segregation and stress generation in the material occur. In this work, the possibility of low doped or SI epilayers via engineering of the boron …

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Gml Represntation For Interoperable Spatial Data Exchange In A Mobile Mapping Application, Venu Madhav Singh Kanaparthy Dec 2004

Gml Represntation For Interoperable Spatial Data Exchange In A Mobile Mapping Application, Venu Madhav Singh Kanaparthy

Theses and Dissertations

Geographic information is critical to GIS applications located remotely for executing business operations. GIS applications need to interoperate to be able to share information for analysis and decision making process. Heterogeneity and complexity of information models and structures limit the data flow and application interoperation. Advancements in Internet technologies provided new opportunities for delivering spatial information to remote users. However, spatial data delivered is in proprietary structures, limiting the utility to GIS applications. To enable information flow between GIS applications a portable data modeling approach is necessary. However, geographic information is inherently complex to model. A comprehensive and standardized vocabulary …

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Imposing Cyclic Strain On Osteogenic Stem Cells: The Effects Of Strain Levels And Repetition Of Cyclic Strain In An Implant Environment, Daniel Henlee Smith Dec 2004

Imposing Cyclic Strain On Osteogenic Stem Cells: The Effects Of Strain Levels And Repetition Of Cyclic Strain In An Implant Environment, Daniel Henlee Smith

Theses and Dissertations

Bone and bone cells have been shown to respond to mechanical forces placed upon them. Particularly, strain plays an important role in osteogenic differentiation of marrow cells around artificial implants in bone. These strains, depending on their magnitude, duration, and repetition, can alter the proliferation and matrix synthesis of osteoblasts. To test how strain parameters influence osteoblast behavior, a four-point bending apparatus was used to impose cyclic strain on osteogenic stem cells isolated from rats and seeded on titanium plates. Cells were stimulated at 1 Hz for 15 minutes daily and compared to an unstrained control. Stimulation occurred at two …

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Improved Estimation Of Epitaxial Thin Film Thickness And Doping Using Fourier Transform Infrared Reflection Spectroscopy, Swapna Geetha Sunkari Dec 2004

Improved Estimation Of Epitaxial Thin Film Thickness And Doping Using Fourier Transform Infrared Reflection Spectroscopy, Swapna Geetha Sunkari

Theses and Dissertations

Film thickness, free carrier concentration and free carrier mobility are critical figures of merit for silicon carbide epitaxial growth. Room temperature Fourier Transform Infrared (FTIR) reflection spectroscopy can estimate these parameters non-destructively and is capable of high-resolution wafer mapping. Commercially available equipment has greatly simplified the application of this technique by coupling a high performance automated spectrometer with model-based data analysis and interpretation based on the personal computer. While powerful numerical techniques run fast and efficient on modern computers, it is essential that low-order, well-conditioned models are needed. The observed reflectance spectrum is the result of reflection and refraction of …

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Predicting Open-Source Software Quality Using Statistical And Machine Learning Techniques, Amit Ashok Phadke Dec 2004

Predicting Open-Source Software Quality Using Statistical And Machine Learning Techniques, Amit Ashok Phadke

Theses and Dissertations

Developing high quality software is the goal of every software development organization. Software quality models are commonly used to assess and improve the software quality. These models, based on the past releases of the system, can be used to identify the fault-prone modules for the next release. This information is useful to the open-source software community, including both developers and users. Developers can use this information to clean or rebuild the faulty modules thus enhancing the system. The users of the software system can make informed decisions about the quality of the product. This thesis builds quality models using logistic …

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Laboratory Evaluation Of Tensile And Shear Strengths Of Asphalt Tack Coats, Mark Everett Woods Dec 2004

Laboratory Evaluation Of Tensile And Shear Strengths Of Asphalt Tack Coats, Mark Everett Woods

Theses and Dissertations

Asphalt tack coats are applied during pavement construction to ensure bond between pavement layers, thus providing a more durable pavement. A prototype tack coat evaluation device (TCED) was developed to evaluate the tensile and torque-shear strength of tack coat materials. Three emulsions (SS-1, CSS-1, and CRS-2) and one asphalt binder (PG 67-22), commonly used as tack coats, were evaluated using the TCED at various application temperatures, application rates, dilutions, and set times. A laboratory bond interface strength device (LBISD) was developed to assess interface shear strength of laboratory-prepared specimens. Mass loss testing was performed to evaluate moisture evaporation and visual …

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Theoretical Modeling Approach For A Common Residential Electrically Heated Oven And Proposed Oven Design Modification, Mark Allan Breen Dec 2004

Theoretical Modeling Approach For A Common Residential Electrically Heated Oven And Proposed Oven Design Modification, Mark Allan Breen

Theses and Dissertations

Current research has developed a fully predictive model of an electrically heated common residential oven. This system was modeled using a fully explicit approach and, where applicable, considered natural convective correlations, various radiation networks, and conduction relations. Two oven configurations were modeled, a conventional (unmodified) residential oven and a modified design. By comparing the theoretical results obtained through modeling with experimental results, verification of the modeling assumptions and results has been achieved. This research has produced an analytical design tool for predictive modeling of time dependant surface temperatures, maximum expected temperatures, and the baking performance of various oven designs. Thus …

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Visualization Of Computer-Modeled Forests For Forest Management, Mahnas Jean Mohammadi-Aragh Dec 2004

Visualization Of Computer-Modeled Forests For Forest Management, Mahnas Jean Mohammadi-Aragh

Theses and Dissertations

Forest management is a costly and time-consuming activity. Remote sensing has the potential to improve the process by making it cheaper and more efficient, but only if appropriate characteristics can be determined from computer-models. This thesis describes the implementation of a forest visualization system and a corresponding user study that tests the accuracy of parameter estimation and forest characterization. The study uses data obtained from field-surveys to generate a computer-modeled forest. Five different stands were tested. Based on the quantitative results obtained, generally, there is no statistically significant difference in parameter estimation when comparing field-recorded movies and computer-generated movies.

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A Comparative Analysis Of Proportional-Integral Compensated Shunt Active Power Filters, Matthew Alan Gray Dec 2004

A Comparative Analysis Of Proportional-Integral Compensated Shunt Active Power Filters, Matthew Alan Gray

Theses and Dissertations

This thesis deals primarily with the simulation and analysis of shunt active power filters (APF) on a three-phase power distribution system possessing a harmonic generating load. The shunt active power filters are analyzed based on effective total harmonic distortion (THD) levels and response to changing dynamics. These results are derived from the simulation of a pulse-width modulation (PWM) controlled voltage source inverter (VSI) with a capacitor connected to the DC side of the VSI. The primary difference between individual simulations is the particular control law implemented in the shunt APF.

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A Hybrid Model For Dtm Generation From Lidar Data, Hyun Seung Lee Dec 2004

A Hybrid Model For Dtm Generation From Lidar Data, Hyun Seung Lee

Theses and Dissertations

This dissertation introduces an innovative technique to extract ground elevation models using smallootprint LIDAR data. This technique consists of a preprocessing step, ground modeling, and interpolation. In the preprocessing step, much of the non-terrain points are eliminated using a histogram-based clustering technique. Then, in the ground modeling stage, the information such as elevation and slope between nearest neighbor points is extracted. This step corresponds to an outlier detection process. In this stage, residuals and gradient indices for elevation and slope, are introduced. These indices are investigated for a constructed 95% confidence interval to discard the remaining non-terrain points. Finally, using …

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Distributed Generation Impact On Fault Response Of A Distrubution [I.E., Distribution] Network, Venkata Ramanujam Kanduri Dec 2004

Distributed Generation Impact On Fault Response Of A Distrubution [I.E., Distribution] Network, Venkata Ramanujam Kanduri

Theses and Dissertations

Electric power systems are a key infrastructure today. Power systems can be divided into three major parts: generation, transmission, and distribution. Out of these the distribution system is the most complex part and least studied system. In order to have continuous and reliable power to all customers it is necessary to have a good protection system. Major disturbances that are caused and last for a very short duration are called faults. With the advent of distributed generation (DG), the understanding of fault response has become more difficult. This thesis presents the study of the fault response and the factors that …

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Comparing Spectral-Object Based Approaches For Extracting And Classifying Transportation Features Using High Resolution Multi-Spectral Satellite Imagery, Sunil Reddy Repaka Dec 2004

Comparing Spectral-Object Based Approaches For Extracting And Classifying Transportation Features Using High Resolution Multi-Spectral Satellite Imagery, Sunil Reddy Repaka

Theses and Dissertations

Recent developments in commercial satellite products have resulted in a broader range of high quality image data, enabling detailed analysis. Transportation features have historically been difficult to accurately identify and structure into coherent networks; prior analyses have demonstrated problems in locating smaller features. One problem is that roadways in urban environments are often partly obscured by proximity to land cover or impervious objects. Ongoing research has focused on object-based methods for classification and different segmentation techniques key to this approach. For this application, software packages such as eCognition have shown encouraging results in assessing spatial and spectral patterns at varied …

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Gas Hydrates To Capture And Sequester Co2, Tao Ding Dec 2004

Gas Hydrates To Capture And Sequester Co2, Tao Ding

Theses and Dissertations

Reducing atmospheric CO2, a main source of greenhouse gas, has been accentuated recently. One focus is capture, separation, and sequestration of industrial CO2. As a hydrate former, CO2 forms hydrates at moderate temperatures and pressures. This phenomenon could be utilized to capture and separate CO2 from flue gases, and also has the potential to sequester CO2 in the deep sds. This research investigated the CO2-N2 separation efficiency of gas hydrates; it investigated the sequestration potential of CO2 hydrates in ocean sediments. The catalytic effect of surfactants in these processes was investigated. A fluorosurfactant FS-62 was mixed with SDS at 100ppm/1000ppm …

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Site-Specific Prediction And Measurement Of Cotton Fiber Quality, Rui Wang Dec 2004

Site-Specific Prediction And Measurement Of Cotton Fiber Quality, Rui Wang

Theses and Dissertations

Maintaining cotton fiber quality is crucial for the survival of the U.S. cotton industry. Previous studies have indicated that spatial variability of fiber quality parameters exists in cotton fields. If site-specific measurement and prediction of quality is possible, then fiber could be segregated during the harvesting process, thus increasing the overall price a producer would receive for his crop. Because of the importance of fiber micronaire to the textile industry, the fact that micronaire exhibits moderate variation in the field, and the fact that it has been shown to be related to optical properties of cotton fibers, micronaire measurement was …

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Multiscale Analysis Of Void Coalescence In Ductile Metals, Matthew Kenneth Jones Dec 2004

Multiscale Analysis Of Void Coalescence In Ductile Metals, Matthew Kenneth Jones

Theses and Dissertations

A mulitscale approach is used to model the coalescence of voids. At the microscale, cylindrical and spherical voids in nickel and the magnesium alloy AM60 are simulated through finite element analyses. The nickel cylindrical void simulations are compared to a set of experiments to validate this micromechanical finite element approach used to study void coalescence. At the macroscale, the coalescence portion of a microstructure-property material model is modified to reflect the behavior of three-dimensional spherical voids using results from the micromechanical simulations. An analysis of an automotive component illustrates the influence of void coalescence at the structural scale.

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Cultural Awareness Levels Of Professionals And Students At Mississippi State University: International Education's Challenge, William Edward Stephen Cottrell Dec 2004

Cultural Awareness Levels Of Professionals And Students At Mississippi State University: International Education's Challenge, William Edward Stephen Cottrell

Theses and Dissertations

The literature indicates that America's demographic transformation is becoming a priority issue for higher education. Consequently, progressive educational leadership has a stake in international education development. Since enhanced cultural awareness is essential to this process, its scarcity in terms of measurable evidence has given rise to this study. Research questions included: (1) What is the level of cultural awareness among professional employees and students at Mississippi State University as measured by the Culture Shock Inventory Measurement Table? (2) Do demographic factors relate to cultural awareness levels of professional employees and students at Mississippi State University? (3) What role does international …

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Investigation Of Inductively Coupled Plasma As An Atomization Source For Analytical And Fundamental Measurements Using Cavity Ringdown Spectroscopy, Fabio Jerome Mazzotti Dec 2004

Investigation Of Inductively Coupled Plasma As An Atomization Source For Analytical And Fundamental Measurements Using Cavity Ringdown Spectroscopy, Fabio Jerome Mazzotti

Theses and Dissertations

Analytical as well as fundamental measurements were performed with an inductively coupled plasma (ICP) using the novel technique of cavity ringdown spectroscopy. A newly designed ICP torch was presented. Limits of detection were measured for elemental mercury, both in an ICP as well as in a cold mercury chemical generator. The efficiency of the technique was compared with laser-induced fluorescence (LIF) in the ICP. Isotopically resolved spectra of uranium were collected with this technique and results were compared to previous studies using LIF. Gas temperature and electron density estimations were done by lineshape measurements on lead atoms in the ICP. …

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Investigation Of Order Parameters And Critical Coupling For The Peierls Extended Hubbard Model At One-Quarter Filling, Rahul Padmakar Hardikar Dec 2004

Investigation Of Order Parameters And Critical Coupling For The Peierls Extended Hubbard Model At One-Quarter Filling, Rahul Padmakar Hardikar

Theses and Dissertations

The determination of the phase boundary between the charge density wave and the Luttinger Liquid phase for the one-dimensional Peierls extended Hubbard model is done using Stochastic Series Expansion and comparison is done with the phase boundary for the Extended Hubbard model. The result of adding an electron-phonon interaction is that the charge density wave phase weakens. par The energy autocorrelation time is reported for the Extended Hubbard Model and the Peierls Hubbard Model. For coupling near and above the critical coupling the autocorrelation time increases exponentially. par Also investigated is the presence of a spin gap and the critical …

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Hispanic Students' Beliefs Regarding Emergent Literacy: A Case Study, Jacqueline L. Breland Worley Dec 2004

Hispanic Students' Beliefs Regarding Emergent Literacy: A Case Study, Jacqueline L. Breland Worley

Theses and Dissertations

The purpose of this study was to identify the beliefs of the participants with regards to emergent literacy. Another purpose was to identify literacy practices employed by the participants while teaching preschool children. An additional purpose was to determine if participation in the course entitled ?Emergent Literacy? changed any beliefs of the participants regarding emergent literacy and subsequent literacy practices employed while teaching preschool children. The final purpose of this study was to determine the beliefs of the participants regarding emergent literacy and subsequent literacy practices employed while teaching preschool children, three years after completing the course entitled ?Emergent Literacy.? …

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On The Green Vol. 35 No. 6 December 10, 2004, Gallaudet University Dec 2004

On The Green Vol. 35 No. 6 December 10, 2004, Gallaudet University

2001-2010

On the Green is an internal publication of Gallaudet College, which later became Gallaudet University. It notified employees of updates around the campus and in the broader community, including new construction and the establishment of new academic programs. Running until 2010, it was supplanted by various forms of online mass communications across multiple audiences.

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Volume 40 - Issue 11 - Friday, December 10, 2004, Rose Thorn Staff Dec 2004

Volume 40 - Issue 11 - Friday, December 10, 2004, Rose Thorn Staff

The Rose Thorn Archive

The Rose Thorn, Rose-Hulman's independent student newspaper.

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