Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2008

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 181 - 210 of 13177

Full-Text Articles in Entire DC Network

Geochemical Impacts From Permanganate Oxidation Based On Field Scale Assessments., Kelly Ann Moore Dec 2008

Geochemical Impacts From Permanganate Oxidation Based On Field Scale Assessments., Kelly Ann Moore

Electronic Theses and Dissertations

In situ chemical oxidation (ISCO) using permanganate is a technology for treatment of organic hazardous wastes. This research is a review of 30 permanganate (MnO4-) ISCO sites to determine whether there are long term impacts on groundwater quality due to the introduction of the oxidant into the subsurface. A second objective is to determine if manganese concentration can be predicted by trends in specific pre and postoxidation monitored parameters (i.e., pH and oxidation reduction potential (ORP)). The final objective is to identify the effects of site and design conditions on groundwater conditions postoxidation. Results indicate that (1) …

Go to article

Towards The Design And Syntheses Of Novel Triads Comprising Single Robson-Type Macrocyclic Dicopper(Ii) Cores Flanked By Two Terminal Polypyridyl Ruthenium(Ii) Complexes., Leslie Shane Moody Dec 2008

Towards The Design And Syntheses Of Novel Triads Comprising Single Robson-Type Macrocyclic Dicopper(Ii) Cores Flanked By Two Terminal Polypyridyl Ruthenium(Ii) Complexes., Leslie Shane Moody

Electronic Theses and Dissertations

Progress toward the syntheses of new tetranuclear bimetallic complexes of copper(II) and ruthenium(II) was realized. The designed triads comprise a central binuclear copper(II) complex with a tetraiminodiphenolate macrocyclic Robson-type compartmental ligand. In the envisioned complexes, the macrocyclic core is further functionalized by attachment of two polypyridyl ruthenium(II) complexes. A novel dibrominated dicopper(II) Robson complex was formed by the 2:2:2 condensation reaction of 4-bromo-2,6-diformylphenol and 1,3- diaminopropane with cupric chloride. Similarly, a new dibrominated dizinc(II) was synthesized from zinc tetrafluoroborate and the same diamine and dialdehyde. The new dicopper(II) complex did not heterocouple with borylated substrates under explored Suzuki reaction conditions. …

Go to article

Illinois State University, One Hundred And Forty-Ninth Annual Commencement, December 13, 2009, Illinois State University Dec 2008

Illinois State University, One Hundred And Forty-Ninth Annual Commencement, December 13, 2009, Illinois State University

Commencement Programs

Normal, Illinois
Illinois State University
One Hundred and Forty-Ninth Annual Commencement
December 13, 2008

Go to article

The Factors That Influence The Graduation Rates Of Community College Transfer Students And Native Students At A Four-Year Public State University, John Randall Dickerson Dec 2008

The Factors That Influence The Graduation Rates Of Community College Transfer Students And Native Students At A Four-Year Public State University, John Randall Dickerson

Theses and Dissertations

The purpose of the study was to investigate the rate at which community college transfer students graduate from the 4 year college and what variables can be used to explain the corresponding graduation rates. In addition, the study attempted to answer the identical question regarding the rate at which native students graduate from the 4 year college and the variables that can be used to explain the native student graduate rates. Finally, the study made comparisons between the community college transfer student variables that explained the corresponding graduation rates and the native student variables that explained their corresponding graduation rates …

Go to article

The Teacher Shortage: Factors That Influence The Recruitment, Retention, And Attrition Of Teachers In Selected Mississippi Teacher Shortage Area, Gloria (Gloria Diane) Hayes Dec 2008

The Teacher Shortage: Factors That Influence The Recruitment, Retention, And Attrition Of Teachers In Selected Mississippi Teacher Shortage Area, Gloria (Gloria Diane) Hayes

Theses and Dissertations

The primary purpose of this study was to determine the magnitude of the teacher shortage in the Mississippi Delta region, and to investigate the factors which seem to influence the attrition and retention of teachers. This study employed a nonexperimental quantitative investigation designed to analyze survey data. The sample for this study included selected K-12 teachers employed in school districts in the Mississippi Delta region, and two non-Delta school districts. 436 teachers participated in the study. The study was designed to answer questions on the commitment level of currently employed teachers in the Mississippi Delta region. Data were collected using …

Go to article

Reconfiguration Of Distribution System Using Survivability Index, Bidur Raj Gautam Dec 2008

Reconfiguration Of Distribution System Using Survivability Index, Bidur Raj Gautam

Theses and Dissertations

Electrical power systems are vulnerable to contingencies due to the possibility of fault or damage. When a serious fault (which cannot be removed immediately) occurs in the power system, the fault needs to be isolated, and the remaining system should be reconfigured to make efficient use of available energy. Reconfiguring the system by making an island can be one of the strategies to continue the energy supply using the remaining generation capacity. By analyzing the effect of contingencies on power systems in terms of voltage support, reliability and stability, survivability of the system can be predicted. A survivability index of …

Go to article

Responsiveness Of Elementary-Aged Students, With And Without Specific Learning Disabilities, To Interventions For Mathematics Calculation, Masanori Ota Dec 2008

Responsiveness Of Elementary-Aged Students, With And Without Specific Learning Disabilities, To Interventions For Mathematics Calculation, Masanori Ota

Theses and Dissertations

The Response to Intervention (RtI) model is an identification model for Specific Learning Disability (SLD), one of the 13 disability categories identified under the Individual with Disabilities Education Act (IDEA) of 2004. The RtI model has been proposed as an alternative model to the discrepancy model (e.g., intelligence quotient-achievement discrepancy model). In the RtI model, students’ responsiveness (e.g., levels of performance and slopes of progress) yields their eligibility for special education. However, to date, research that examined the validity of the RtI model (e.g., examination of intervention responsiveness with students with academic deficits) has been limited in the area of …

Go to article

Nitrogen Doping In Low Temperature Halo-Carbon Homoepitaxial Growth Of 4h-Silicon Carbide, Kritsa Chindanon Dec 2008

Nitrogen Doping In Low Temperature Halo-Carbon Homoepitaxial Growth Of 4h-Silicon Carbide, Kritsa Chindanon

Theses and Dissertations

With the low-temperature halo-carbon epitaxial growth technique developed at MSU prior to this work, use of a halo-carbon growth precursor enabled low-temperature homoepitaxial process for 4H-SiC at temperatures below 1300 °C with good quality. Investigations of the nitrogen doping dependence are reported. It has been demonstrated that the efficiency of the nitrogen incorporation may be different for different substrate orientations, with the Cace showing the higher value of doping. The Si/C ratio is known to influence the doping during the epitaxial growth due to the site-competition mechanism. The doping on the Cace showed weak dependence on the Si/C ratio. On …

Go to article

Development Of Overcurrent Relay Model And Power System Simulator Using National Instruments Devices In Real-Time, Sunil Kumar Palla Dec 2008

Development Of Overcurrent Relay Model And Power System Simulator Using National Instruments Devices In Real-Time, Sunil Kumar Palla

Theses and Dissertations

One of the major objectives at Mississippi State University’s Power and Energy Research Laboratory (PERL) is to develop an adaptive protective controller for Shipboard Power System (SPS) protection. This thesis work focuses on developing an overcurrent relay model in LabVIEW software and validating the developed model by conducting Hardware-in-the-Loop (HIL) tests with Real-Time Digital Simulator (RTDS) and commercial Schweitzer Engineering Laboratories (SEL)-351S directional over-current relay. Simulation results show that the developed relay model is quite flexible, efficient and can be used in real-time. Modeling efforts to establish a HIL platform using National Instruments devices have been presented here. This thesis …

Go to article

Development Of A Geovisual Analytics Environment Using Parallel Coordinates With Applications To Tropical Cyclone Trend Analysis, Chad A. Steed Dec 2008

Development Of A Geovisual Analytics Environment Using Parallel Coordinates With Applications To Tropical Cyclone Trend Analysis, Chad A. Steed

Theses and Dissertations

A global transformation is being fueled by unprecedented growth in the quality, quantity, and number of different parameters in environmental data through the convergence of several technological advances in data collection and modeling. Although these data hold great potential for helping us understand many complex and, in some cases, life-threatening environmental processes, our ability to generate such data is far outpacing our ability to analyze it. In particular, conventional environmental data analysis tools are inadequate for coping with the size and complexity of these data. As a result, users are forced to reduce the problem in order to adapt to …

Go to article

Development Of Corrective Actions For Higher Order Contingencies, Bharath Kumar Ravulapati Dec 2008

Development Of Corrective Actions For Higher Order Contingencies, Bharath Kumar Ravulapati

Theses and Dissertations

The importance of the electric power infrastructure has been exposed by several blackouts throughout the world in the last decade. These blackouts were caused mainly by physical vulnerabilities, human errors and natural disasters. The power grid is becoming more and more prone to outages which affect not only the power system network, but also other infrastructures and the society in several ways. Utilities generally operate with an (N-1) security level (no violations for single outage), and blackouts are generally caused by higher order contingencies. There is lack of effective methods and analysis tools to deal with higher order contingencies. Higher …

Go to article

Enhanced Models For Mixtures Of Fluids In Chemical Equilibrium At High Pressures, Pietro Gaiaschi Dec 2008

Enhanced Models For Mixtures Of Fluids In Chemical Equilibrium At High Pressures, Pietro Gaiaschi

Theses and Dissertations

This thesis is concerned with the numerical simulation of mixtures of chemically reacting fluids at high pressures. Mixture rules are established, accommodating components that do not follow the thermally perfect Equation of State (EoS), and including formulas for the fugacities. Particular attention has been given to the species EoS originally developed by Hirschfelder, Buehler, McGee and Sutton. The Law of Mass Action that governs chemical equilibrium of mixtures of fluids is presented. The common assumption of neglecting fugacities contributions when calculating the equilibrium composition is assessed by comparing complete thermochemical predictions with those obtained by reduced models. For air mixtures …

Go to article

Epidemiologic And Economic Study Of Hyperelastosis Cutis/Herda In The Quarter Horse Cutting Industry, Sally Grant Tipton Dec 2008

Epidemiologic And Economic Study Of Hyperelastosis Cutis/Herda In The Quarter Horse Cutting Industry, Sally Grant Tipton

Theses and Dissertations

Hyperelastosis Cutis (HC) is an autosomal recessive disorder in Quarter Horses. Homozygous (Hr/Hr) horses are affected with fragile, hyperextensible skin that sloughs and scars easily following minor trauma. Heterozygous (N/Hr) horses appear normal, but carry one copy of the gene. Objectives were to determine inbreeding coefficients of affected (Hr/Hr), carrier (N/Hr), and normal (N/N) Quarter Horses, compared to Thoroughbreds, and evaluate economic effects of HC within the cutting horse industry. Of the top cutting horses from 1985 through 2006, 35 were confirmed carriers by either DNA analysis or production of affected offspring. Although 23% of the earnings from the leading …

Go to article

Analysis Of Exhaust Waste Heat Recovery Techniques From Stationary Power Generation Engines Using Organic Rankine Cycles, Devin Krishna Sham Dec 2008

Analysis Of Exhaust Waste Heat Recovery Techniques From Stationary Power Generation Engines Using Organic Rankine Cycles, Devin Krishna Sham

Theses and Dissertations

Strict emissions legislation and energy security debates have spurred extensive research in alternative fuels and renewable energies. Literature research has shown the need for improvements in internal combustion engines (ICE) due to their low efficiencies. Significant gains in efficiency can be accomplished with the use of waste heat recovery (WHR) techniques. Organic rankine cycles (ORC) with turbocompounding harness the waste heat from an ICE to improve efficiency and fuel economy while reducing brake-specific emissions. A mathematical model was developed to explore the potential gains in 1st and 2nd law efficiencies. The model approaches the evaluations of the ORC from a …

Go to article

Instructional Leadership: Perceptions Of Mississippi Career And Technical Education Administrators And Teachers, Leanne Freeman (Cheryl Leanne Freeman) Long Dec 2008

Instructional Leadership: Perceptions Of Mississippi Career And Technical Education Administrators And Teachers, Leanne Freeman (Cheryl Leanne Freeman) Long

Theses and Dissertations

The purpose of this study was to determine perceptions of instructional leadership behaviors from Mississippi secondary career and technical education administrators and teachers in order to assist career and technical education administrators in becoming better instructional leaders. This research was conducted for the following purposes: (a) to determine which perceived instructional leadership behavior teachers consider most important, (b) to determine which perceived instructional leadership behavior administrators consider most important, (c) to determine if a difference exists in perceived instructional leadership behaviors between administrators and teachers, (d) to determine if a difference exists in perceived instructional leadership behaviors between career and …

Go to article

Model Development Of A Polymer Electrolyte Membrane Fuel Cell To Predict Steady And Unsteady Behavior, Bikash Mishra Dec 2008

Model Development Of A Polymer Electrolyte Membrane Fuel Cell To Predict Steady And Unsteady Behavior, Bikash Mishra

Theses and Dissertations

Fuel cells are promising technology to meet the energy need of the future. This alternative energy source is clean and efficient, and with the continuous decrease in fossil fuel resources, one of the best bets towards sustaining our power needs. Fuel cells are being used in automobiles as well as to fulfill portable power needs. In this work a computational model has been developed for fuel cells which can be used to simulate traditional as well as passive proton exchange membrane fuel cell behavior. The model is unsteady, two phase, nonisothermal in nature, and also capable of handling natural convection …

Go to article

Molecular Dynamics Simulations Of Metals, Bohumir Jelinek Dec 2008

Molecular Dynamics Simulations Of Metals, Bohumir Jelinek

Theses and Dissertations

This dissertation describes the development and testing of modified embedded atom method (MEAM) interatomic potentials for Al, Si, Mg, Cu, Fe, and their alloys, with primary concentration on Mg-Al system. We performed the density functional theory (DFT) based ab initio calculations to determine the structural and elastic properties of element pairs that are impractical to obtain from experimental measurements. Specifically, we estimated the cohesive energy, equilibrium atomic volume, bulk modulus, and elastic moduli of every element pair in the NaCl reference structure. Based on the results of DFT calculations, MEAM parameters for each element pair were constructed. We extensively tested …

Go to article

Evaluation Of Propane Fueled Chp Systems For Small Commercial Applications, Justin Byron Ramsay Dec 2008

Evaluation Of Propane Fueled Chp Systems For Small Commercial Applications, Justin Byron Ramsay

Theses and Dissertations

This thesis evaluates the effects of Combined Heating and Power (CHP) systems with a Propane fueled spark ignited engine as prime mover used in a small commercial building. The system was evaluated in five different U.S. cities. The most common operating modes, thermal load following (FTL) and electric load following (FEL) were evaluated, and an optimized operating mode was developed and investigated. The optimized operating mode is a hybrid (FHL) of FEL and FTL operation. Methodology for the derivation and application of these models is presented. Also, the economic effects of Diesel and Natural Gas were investigated. The results for …

Go to article

Exploration Of The Genomes Of Two Diverse Conifers, Supaphan Thummasuwan Dec 2008

Exploration Of The Genomes Of Two Diverse Conifers, Supaphan Thummasuwan

Theses and Dissertations

My research is focused on advancing understanding of the genomes of two important distantly related conifer species, loblolly pine (Pinus taeda L.) and bald cypress (Taxodium distichum (L.) Rich. var. distichum). Loblolly pine is the most commercially important tree crop in the United States, the major source of pulpwood for paper manufacturing, a source of quality lumber, a prime bioenergy feedstock, and an important part of the ecosystem of the southeastern U.S. Bald cypress is the dominant tree species in the aptly named ¡°cypress swamps¡± of the South.Its ecological importance to the wetlands of the southern U.S. is immeasurable. Moreover, …

Go to article

Fabrication Of Aluminum Matrix Particulate Composites By Compaction And Sintering, Wei Li Dec 2008

Fabrication Of Aluminum Matrix Particulate Composites By Compaction And Sintering, Wei Li

Theses and Dissertations

With the possession of extremely broad unique properties, particulate reinforced aluminum composites are very attractive in diverse applications. Aluminum matrix particulate composites are challenging to work with. A single pressing and sintering process was used to fabricate the reinforced aluminum composites in this study. The key advantage of this method is its comparative low expense. However, abrasive reinforcement powders can lead to shorter tool life. To study the fundamental wear mechanisms during the die compaction process, a new method was developed and combined with experiments to quantify tool wear. Automatic die compaction experiments and tribological experiments are employed in this …

Go to article

A Study Of Statewide Transfer And Articulation Reporting System (Stars) Approved Courses Completed At An Alabama Community College, Khristy Gibson Large Dec 2008

A Study Of Statewide Transfer And Articulation Reporting System (Stars) Approved Courses Completed At An Alabama Community College, Khristy Gibson Large

Theses and Dissertations

The primary purpose of this study was to determine if students have earned more STARS articulated and transferrable hours since the creation of the STARS program than students did before the existence of the program in the state of Alabama. Study results revealed that the STARS program has had a significant impact on the amount of articulated credit hours students have earned since the creation of the STARS program. Additional variables such as ethnicity, gender, GPA, status, and student type were also used to determine if significant differences existed among these variables in students completing STARS-approved hours. Pre-existing data were …

Go to article

A Case Study Examining The Collaboration Between General Education And Special Education Teachers In Inclusive Classrooms, Tina Atkins Dec 2008

A Case Study Examining The Collaboration Between General Education And Special Education Teachers In Inclusive Classrooms, Tina Atkins

Theses and Dissertations

Increased accountability mandates from the No Child Left Behind Act of 2001 and the Individuals with Disabilities Education Improvement Act of 2004 have resulted in general education teachers with disabled students in their classrooms. Within the inclusive classroom, the special education teacher and the general education teacher must develop a collaborative relationship that will consider the needs of the special education students and general education students. Villa and Thousand (1996) described the benefits of collaboration in schools: “Collaboration enables school personnel to meet diverse student needs through shared expertise and ownership of problem definitions and solutions” (p. 170). The purpose …

Go to article

Library Education In Bangladesh: Strengths, Problems, And Suggestions, A.I.M. Jakaria Rahman, Momena Khatun, Dr. Mohammed Mezbah-Ul-Islam Dec 2008

Library Education In Bangladesh: Strengths, Problems, And Suggestions, A.I.M. Jakaria Rahman, Momena Khatun, Dr. Mohammed Mezbah-Ul-Islam

Library Philosophy and Practice (e-journal)

This article examines the historical development and current trends of library education system in Bangladesh, identifies educational institutions involved, and determines the strength of current l

Go to article

On The Green Vol. 37 No. 46 December 12, 2008, Gallaudet University Dec 2008

On The Green Vol. 37 No. 46 December 12, 2008, 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.

Go to article

Volume 44 - Issue 10 - Friday, December 12, 2008, Rose Thorn Staff Dec 2008

Volume 44 - Issue 10 - Friday, December 12, 2008, Rose Thorn Staff

The Rose Thorn Archive

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

Go to article

2008 Fall Commencement Program: Winona State University, Winona State University Dec 2008

2008 Fall Commencement Program: Winona State University, Winona State University

WSU Commencement Programs

This is the Winona State University Fall 2008 commencement program. Commencement was on Friday December 12, 2008.

Go to article

Fall 2008 Commencement Program, University Of Alabama In Huntsville Dec 2008

Fall 2008 Commencement Program, University Of Alabama In Huntsville

Commencement Programs

No abstract provided.

Go to article

Search For Third Generation Scalar Leptoquarks Decaying Into ΤB, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Dec 2008

Search For Third Generation Scalar Leptoquarks Decaying Into ΤB, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

We have searched for third generation leptoquarks (LQ3) using 1.05 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider operating at √s = 1.96 TeV. We set a 95% C.L. lower limit of 210 GeV on the mass of a scalar LQ3 state decaying solely to a b quark and a τ lepton.

Go to article

Increasing The Performance Of The Tangential Vector Finite Element Method By Utilizing A Graphics Processing Unit As A Parallel Coprocessor, Maxwell U. Woolsey Dec 2008

Increasing The Performance Of The Tangential Vector Finite Element Method By Utilizing A Graphics Processing Unit As A Parallel Coprocessor, Maxwell U. Woolsey

Electronic Theses and Dissertations

No abstract provided.

Go to article

Minutes, College Of Education Early Childhood Education Committee Meeting, December 12, 2008, University Of South Florida St. Petersburg. College Of Education. Early Childhood Education Committee Dec 2008

Minutes, College Of Education Early Childhood Education Committee Meeting, December 12, 2008, University Of South Florida St. Petersburg. College Of Education. Early Childhood Education Committee

College of Education: Ad Hoc and Occasional Committees

Minutes from the December 12, 2008, meeting of the Early Childhood Education Committee of the University of South Florida St. Petersburg's College of Education.

Go to article

First Prev Next Last