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Seasonal Adaptation Of Vegetation Color In Satellite Images For Flight Simulations, Yuzhong Shen, Jiang Li, Vamsi Mantena, Srinivas Jakkula Jan 2009

Seasonal Adaptation Of Vegetation Color In Satellite Images For Flight Simulations, Yuzhong Shen, Jiang Li, Vamsi Mantena, Srinivas Jakkula

Electrical & Computer Engineering Faculty Publications

Automatic vegetation identification plays an important role in many applications including remote sensing and high performance flight simulations. This paper proposes a novel method that identifies vegetative areas in satellite images and then alters vegetation color to simulate seasonal changes based on training image pairs. The proposed method first generates a vegetation map for pixels corresponding to vegetative areas, using ISODATA clustering and vegetation classification. The ISODATA algorithm determines the number of clusters automatically. We then apply morphological operations to the clustered images to smooth the boundaries between clusters and to fill holes inside clusters. Six features are then computed …

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Effects Of An Informal Science Program On The Perceptions Of 4-6th Grade Minority Girls Toward Science And Stem Careers, Angel Thomas Jan 2009

Effects Of An Informal Science Program On The Perceptions Of 4-6th Grade Minority Girls Toward Science And Stem Careers, Angel Thomas

OTS Master's Level Projects & Papers

The problem of this study was to determine whether participation in an informal STEM program would positively influence the perceptions of African-American girls in grades 4-6 about science.

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Significant Differences Between Seventh And Eighth Grade Students Enrolled In Keyboarding To Earn High School Credit, Kellie Wheeler Jan 2009

Significant Differences Between Seventh And Eighth Grade Students Enrolled In Keyboarding To Earn High School Credit, Kellie Wheeler

OTS Master's Level Projects & Papers

The purpose of this study was to investigate seventh and eighth grade students end of course grades in keyboarding to determine if their passing score were higher for students who were more mature in age.

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Instructional Alignment Of Workplace Readiness Skills In Career And Technical Education, Sarah Jane Martin Jan 2009

Instructional Alignment Of Workplace Readiness Skills In Career And Technical Education, Sarah Jane Martin

STEMPS Theses & Dissertations

The United States faces a skills shortage that goes beyond academic and technical skills. Employers report entry-level workers lack the necessary "soft" skills, also referred to as workplace readiness skills, needed for success in the workforce; thus, calling on educational institutions to make improvements in high school curriculum in order to address the skills gap. The intent of this dissertation was to examine high school marketing education teachers' knowledge of workplace readiness skills and whether that knowledge had an impact on student workplace readiness skill achievement. Further, this study examined the usage of Virginia's 13 Workplace Readiness Skills curriculum and …

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Comparing High School Students' And Adults' Perceptions Of Technological Literacy, Henry Ladson Harrison Iii Jan 2009

Comparing High School Students' And Adults' Perceptions Of Technological Literacy, Henry Ladson Harrison Iii

STEMPS Theses & Dissertations

This study compared high school student's perceptions of technology and technological literacy to those perceptions of the general public. Additionally, individual student groups were compared statistically to determine significant differences between the groups. The ITEA/Gallup Poll instrument was used to survey high school student's perceptions of technology in the study. The instrument has been used twice (2001, 2004) in the United States and once (2005) in Hong Kong to survey adult's perceptions of technology. The student population in question consisted of three subgroups: students enrolled in a standards-based technology education courses, students enrolled in a Project Lead the Way® (PLTW®) …

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Supporting Protocols For Structuring And Intelligent Information Dissemination In Vehicular Ad Hoc Networks, Filip Cuckov Jan 2009

Supporting Protocols For Structuring And Intelligent Information Dissemination In Vehicular Ad Hoc Networks, Filip Cuckov

Electrical & Computer Engineering Theses & Dissertations

The goal of this dissertation is the presentation of supporting protocols for structuring and intelligent data dissemination in vehicular ad hoc networks (VANETs). The protocols are intended to first introduce a structure in VANETs, and thus promote the spatial reuse of network resources. Segmenting a flat VANET in multiple cluster structures allows for more efficient use of the available bandwidth, which can effectively increase the capacity of the network. The cluster structures can also improve the scalability of the underlying communication protocols. The structuring and maintenance of the network introduces additional overhead. The aim is to provide a mechanism for …

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Results From A Mathematical Model For Human Monocytic Ehrlichiosis, H. Gaff, L. Gross, E. Schaefer Jan 2009

Results From A Mathematical Model For Human Monocytic Ehrlichiosis, H. Gaff, L. Gross, E. Schaefer

Biological Sciences Faculty Publications

Human monocytic ehrlichiosis (Ehrlichia chaffeensis), HME, is a tick-transmitted, rickettsial disease that has recently increased substantially in the USA from 142 reported cases in 2001 to 506 reported cases in 2005 [1,2]. There have been increasing surveys of tick populations over the past 10 years that have in turn supported the development of models for tick-borne disease transmission. Resulting HME models [3] suggest the importance of metapopulation structures, landscape environment parameters and periodic climatic effects in predicting the dynamics of HME transmission and the efficacy of control efforts, such as the reduction of the tick population through acaricide …

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Regional Characterisation Of Hard-Bottom Nursery Habitat For Juvenile Caribbean Spiny Lobster (Panulirus Argus) Using Rapid Assessment Techniques, Rodney D. Bertelsen, Mark J. Butler Iv, William F. Herrnkind, John H. Hunt Jan 2009

Regional Characterisation Of Hard-Bottom Nursery Habitat For Juvenile Caribbean Spiny Lobster (Panulirus Argus) Using Rapid Assessment Techniques, Rodney D. Bertelsen, Mark J. Butler Iv, William F. Herrnkind, John H. Hunt

Biological Sciences Faculty Publications

Shallow, hard-bottom habitat constitutes approximately 30% of the coastal waters of south Florida, United States, yet it is a chronically understudied feature of the marine seascape in this region. In this study, we characterised the general biogeographic and structural features of shallow benthic hard-bottom communities in the Florida Keys, and related those to the abundance of juvenile Caribbean spiny lobster (Panulirus argus), the target of one of Florida's most economically valuable fisheries. We used rapid assessment techniques to survey more than 100 hard-bottom sites in the Florida Keys to estimate the percentage bottom coverage of vegetation (seagrass and …

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Phytoplankton Blooms: Their Occurence And Composition Within Virginia's Tidal Tributaries, Harold G. Marshall, Todd A. Egerton Jan 2009

Phytoplankton Blooms: Their Occurence And Composition Within Virginia's Tidal Tributaries, Harold G. Marshall, Todd A. Egerton

Biological Sciences Faculty Publications

Sporadic algal bloom development within a 10 year monitoring program in Virginia tidal tributaries of Chesapeake Bay is reviewed. These blooms were common events, characteristically producing a color signature to the surface water, typically short lived, occurring mainly from spring into autumn throughout different salinity regions of these rivers, and were produced primarily by dinoflagellates. The abundance threshold levels that would identify bloom status from a non-bloom presence were species specific, varied with the taxon's cell size, and ranged from ca. 10 to 10(4) cells mL(-1). Among the most consistent sporadic bloom producers were the dinoflagellates Akashiwo sanguinea, Cochlodinium …

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Patterns Of Larval Atlantic Croaker Ingress Into Chesapeake Bay, Usa, Jason J. Schaffler, Christian S. Reiss, Cynthia M. Jones Jan 2009

Patterns Of Larval Atlantic Croaker Ingress Into Chesapeake Bay, Usa, Jason J. Schaffler, Christian S. Reiss, Cynthia M. Jones

OES Faculty Publications

We compared ingress patterns of Atlantic croaker Micropogonias undulatus larvae into Chesapeake Bay, USA, with published ingress patterns through barrier island inlets, the accepted model for larval fish ingress. This model asserts that larvae ingress on night flood tides at the flooddominated side of the inlet and at all depths. At the Chesapeake Bay mouth and in the adjacent coastal waters, we compared the distribution of abundance, size, age, and growth rates of croaker prior to ingress, In contrast to the barrier island inlet model, croaker larvae were more abundant at depth than closer to the surface regardless of location. …

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Synergistic Effects Of Iron And Temperature On Antarctic Phytoplankton And Microzooplankton Assemblages, J. M. Rose, Y. Feng, G. R. Ditullio, R. B. Dunbar, C. E. Hare, P. A. Lee, M. Lohan, M. Long, W. O. Smith Jr., B. Sohst, S. Tozzi, Y. Zhang, D. A. Hutchins Jan 2009

Synergistic Effects Of Iron And Temperature On Antarctic Phytoplankton And Microzooplankton Assemblages, J. M. Rose, Y. Feng, G. R. Ditullio, R. B. Dunbar, C. E. Hare, P. A. Lee, M. Lohan, M. Long, W. O. Smith Jr., B. Sohst, S. Tozzi, Y. Zhang, D. A. Hutchins

OES Faculty Publications

Iron availability and temperature are important limiting factors for the biota in many areas of the world ocean, and both have been predicted to change in future climate scenarios. However, the impacts of combined changes in these two key factors on microbial trophic dynamics and nutrient cycling are unknown. We examined the relative effects of iron addition (+1 nM) and increased temperature (+4° C) on plankton assemblages of the Ross Sea, Antarctica, a region characterized by annual algal blooms and an active microbial community. Increased iron and temperature individually had consistently significant but relatively minor positive effects on total phytoplankton …

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Assessment Of Training Needs For Early/Primary Private School Teachers, Regina Flora Jan 2009

Assessment Of Training Needs For Early/Primary Private School Teachers, Regina Flora

OTS Master's Level Projects & Papers

The problem of this study was to determine the training needs of staff at Mercy Crossing Christian Academy to project pertinent courses for professional development.

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Review Of Student Performance In Developmental Mathematics Courses Taught At Virginia Western Community College, T. Jonathan Bayer Jan 2009

Review Of Student Performance In Developmental Mathematics Courses Taught At Virginia Western Community College, T. Jonathan Bayer

OTS Master's Level Projects & Papers

The problem of this study was to determine changes that should be made by Virginia Western mathematics faculty to improve developmental mathematics instruction.

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Workkeys Mathematics Skill-Level Scores As Predictors For Placement Into College-Level Mathematics, Wanda Sadler Jan 2009

Workkeys Mathematics Skill-Level Scores As Predictors For Placement Into College-Level Mathematics, Wanda Sadler

OTS Master's Level Projects & Papers

A study to determine the relationship between the WorkKeys applied mathematics skill level scores and the COMPASS/ESL mathematics placement scores as predictors for placement in college level mathematics.

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Effectiveness Of A+ Learning Software In Assisting Students With Learning And Reducing Behavior Problems, Jason Buchanan Jan 2009

Effectiveness Of A+ Learning Software In Assisting Students With Learning And Reducing Behavior Problems, Jason Buchanan

OTS Master's Level Projects & Papers

The problem of this study was to determine the effectiveness of the A+ Learning Software in assisting students with learning and reducing behavioral problems at Piedmont Alternative School.

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Perceptions Of Technology Education Supervisors Toward Implementation Of Engineering By Design Courses In Virginia Public Schools, Terrance Beddow Jan 2009

Perceptions Of Technology Education Supervisors Toward Implementation Of Engineering By Design Courses In Virginia Public Schools, Terrance Beddow

OTS Master's Level Projects & Papers

The problem of this study was to determine the perceptions of Virginia technology education supervisors toward implementation of Engineering by Design courses in Virginia public schools.

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Virginia Beach Middle School Work And Family Studies Teacher's Implementation Of The Virginia Workforce Readiness Lesson Plans, Carole Forbes Jan 2009

Virginia Beach Middle School Work And Family Studies Teacher's Implementation Of The Virginia Workforce Readiness Lesson Plans, Carole Forbes

OTS Master's Level Projects & Papers

The problem of this study was to determine if Virginia Beach Middle School Work and Family Studies teachers were incorporating Virginia Workforce Readiness lesson plans as lessons for the improvement of student career preparation skills.

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A Meta-Analysis Of Supplemental Educational Services (Ses) Provider Effects On Student Achievement, Shanan L. Chappell Jan 2009

A Meta-Analysis Of Supplemental Educational Services (Ses) Provider Effects On Student Achievement, Shanan L. Chappell

Teaching & Learning Theses & Dissertations

The 2001 renewal of the United States' Title I program, which provides federal funds to schools with large populations of low-income students, instituted the Supplemental Educational Services (SES) program in which schools in their third year of failing to make Adequate Yearly Progress (AYP) are required to offer after-school tutoring in core subjects to low-income students, provided by public or private tutoring agencies. States are responsible for implementing, overseeing, and evaluating the SES programs; currently, several states and large local school districts have performed evaluations, with many more in the process of publishing results from statewide SES studies. Although state …

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The Impact Of Dual Enrollment Participation On Degree Attainment, Peggy Anne Westcott Jan 2009

The Impact Of Dual Enrollment Participation On Degree Attainment, Peggy Anne Westcott

Educational Leadership & Workforce Development Theses & Dissertations

Dual enrollment programs continue to grow in the United States; however, little empirical research examines the relationship between this high school experience and future college success and degree attainment. This study examines degree attainment for first-time beginning students who began their postsecondary education at a Virginia Community College during the fall semester, 2002. It follows those students for six years across all institutions attended, comparing degree attainment for two identified groups; students with dual enrollment credit earned prior to fall 2002 (dual enrolled students) and students with no prior dual credit (traditional students). It explores the differences that exist between …

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Modeling And Simulation Of Coaxial Helicopter Rotor Aerodynamics, Murat Gecgel Jan 2009

Modeling And Simulation Of Coaxial Helicopter Rotor Aerodynamics, Murat Gecgel

Mechanical & Aerospace Engineering Theses & Dissertations

A framework is developed for the computational fluid dynamics (CFD) analyses of a series of helicopter rotor flowfields in hover and in forward flight. The methodology is based on the unsteady solutions of the three-dimensional, compressible Navier-Stokes equations recast in a rotating frame of reference. The simulations are carried out by solving the developed mathematical model on hybrid meshes that aim to optimally exploit the benefits of both the structured and the unstructured grids around complex configurations. The computer code is prepared for parallel processing with distributed memory utilization in order to significantly reduce the computational time and the memory …

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Analysis Of N-Linked Oligosaccharides Of Prostate-Specific Antigen And Prostatic Acid Phosphatase In Prostatic Fluids, Krista Yaudes White Jan 2009

Analysis Of N-Linked Oligosaccharides Of Prostate-Specific Antigen And Prostatic Acid Phosphatase In Prostatic Fluids, Krista Yaudes White

Theses and Dissertations in Biomedical Sciences

Presently, prostate cancer is the most common cancer afflicting men in the United States, with serum PSA being the "gold standard" protein biomarker used in the clinic for detecting and diagnosing prostate cancer. Nonetheless, serum PSA levels can also be elevated in non-cancerous conditions as well, such as benign prostatic hyperplasia (BPH). Due to this overlap, many unnecessary biopsies and radical prostatectomies occur, leading to patient distress. Despite recent advances to clinical assays which consider other clinical parameters, there is still a great need for improved clinical detection methodologies for prostate cancer, including improved biomarkers. Therefore, this research project aims …

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Spin Structure Of The Deuteron, Nevzat Guler Jan 2009

Spin Structure Of The Deuteron, Nevzat Guler

Physics Theses & Dissertations

Double spin asymmetries for the proton and the deuteron have been measured in the EG1b experiment using the CLAS detector at Jefferson Lab. Longitudinally polarized electrons at energies 1.6, 2.5, 4.2 and 5.7 GeV were scattered from longitudinally polarized NH3 and ND3 targets. The double spin asymmetry A|| for the proton and the deuteron has been extracted from these data as a function of W and Q2 with unprecedented precision. The virtual photon asymmetry A1 and the spin structure function g1 can be calculated from these measurements by using parametrization to the world data for the virtual …

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Neutron Structure Functions Measured With Spectator Tagging, Svyatoslav Tkachenko Jan 2009

Neutron Structure Functions Measured With Spectator Tagging, Svyatoslav Tkachenko

Physics Theses & Dissertations

We know much less about the neutron than the proton due to the absence of free neutron targets. Neutron information has to be extracted from data on nuclear targets like deuterium. This requires corrections for off-shell and binding effects which are not known from first principles and therefore are model-dependent. As a consequence, the same data can be interpreted in different ways, leading to different conclusions about important questions such as the value of the d/u quark ratio at large momentum fraction x. The Barely Off-shell NUcleon Structure (BONUS) experiment at Jefferson Lab addressed this problem by tagging spectator protons …

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An Integrated Probability-Based Approach For Multiple Response Surface Optimization, Okay Isik Jan 2009

An Integrated Probability-Based Approach For Multiple Response Surface Optimization, Okay Isik

Engineering Management & Systems Engineering Theses & Dissertations

Nearly all real life systems have multiple quality characteristics where individual modeling and optimization approaches can not provide a balanced compromising solution. Since performance, cost, schedule, and consistency remain the basics of any design process, design configurations are expected to meet several conflicting requirements at the same time. Correlation between responses and model parameter uncertainty demands extra scrutiny and prevents practitioners from studying responses in isolation. Like any other multi-objective problem, multi-response optimization problem requires trade-offs and compromises, which in turn makes the available algorithms difficult to generalize for all design problems. Although multiple modeling and optimization approaches have been …

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A Subspace Projection Methodology For Nonlinear Manifold Based Face Recognition, Praveen Sankaran Jan 2009

A Subspace Projection Methodology For Nonlinear Manifold Based Face Recognition, Praveen Sankaran

Electrical & Computer Engineering Theses & Dissertations

A novel feature extraction method that utilizes nonlinear mapping from the original data space to the feature space is presented in this dissertation. Feature extraction methods aim to find compact representations of data that are easy to classify. Measurements with similar values are grouped to same category, while those with differing values are deemed to be of separate categories. For most practical systems, the meaningful features of a pattern class lie in a low dimensional nonlinear constraint region (manifold) within the high dimensional data space. A learning algorithm to model this nonlinear region and to project patterns to this feature …

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Computational Studies On R67 Dihydrofolate Reductase: An Investigation Into Its Unique Binding Patterns, Chuanyin Shi Jan 2009

Computational Studies On R67 Dihydrofolate Reductase: An Investigation Into Its Unique Binding Patterns, Chuanyin Shi

Theses and Dissertations in Biomedical Sciences

R67 dihydrofolate reductase (R67 DHFR) is a plasmid encoded enzyme which catalyzes the reduction of dihydrofolate (DHF) to tetrahydrofolate (THF) using NADPH as a cofactor. R67 DHFR is a homo-tetramer and D2 symmetric. It contains only one active site, which spans the central channel of the enzyme. The active site can bind either two reactants (DHF), two cofactors (NADPH) or one of each (NADPH/DHF), which is the productive ternary complex (i.e. the complex which yields product). In order to favor formation of the productive complex, this enzyme exhibits binding cooperativity. Unlike other allosteric enzymes which achieve binding cooperativity through conformational …

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Relationship Between Discipline Referrals In Career And Technical Education As Compared To Core Classes, Kim Genge Jan 2009

Relationship Between Discipline Referrals In Career And Technical Education As Compared To Core Classes, Kim Genge

OTS Master's Level Projects & Papers

A study to determine whether there was a relationship between discipline referrals in career and technical education as compared to academic classes for determining factors that could be used to reduce referrals in eighth grade. Determine the number of referrals written by career and technical education and academic teachers. Determine if career and technical education classes provided environments and instructional strategies which reduced discipline referrals.

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A Comparison Of Use Of Archived Video-Streamed Tapes, Donald Jerry Bartley Jan 2009

A Comparison Of Use Of Archived Video-Streamed Tapes, Donald Jerry Bartley

OTS Master's Level Projects & Papers

The problem of this study was to compare Old Dominion University's Occupational and Technical Studies distance education graduate students who made use of archived classroom tapes in order to determine the usefulness of the archived tapes for improved classroom performance.

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Relationship Of Gender To Grades In A General Education Technology Course, Harry Stout Jan 2009

Relationship Of Gender To Grades In A General Education Technology Course, Harry Stout

OTS Master's Level Projects & Papers

A study to determine the relationship between male and female student's final grades in a general education technology course to determine if gender plays a role in achieving academic excellence in the course. There is no correlation between a student's gender and the achievement of academic excellence in a post-secondary technology course.

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Addressing The Principles For School Mathematics: A Case Study Of Elementary Teachers Pedagogy And Practices In An Urban High-Poverty School, Robert Q. Berry, Linda Bol, Sueanne E. Mckinney Jan 2009

Addressing The Principles For School Mathematics: A Case Study Of Elementary Teachers Pedagogy And Practices In An Urban High-Poverty School, Robert Q. Berry, Linda Bol, Sueanne E. Mckinney

Educational Leadership & Workforce Development Faculty Publications

The extent to which four novice teachers assigned to an urban high-poverty school implemented the Principles of School Mathematics during their mathematics instruction program was investigated using a case study design. The research team conducted 36 unannounced observations of the participating teachers and utilized a developed assessment to guide their observations. Results indicated that only one teacher was judged proficient for all the principles. The remaining three teachers fell short in the implementation and direction of the principles. Detailed descriptions of the pedagogical practices of the teachers are provided.

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