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Laureate, 2003, Old Dominion University

University Yearbooks

2003 yearbook of Old Dominion University

The Relationship Between Afloat Training Group Norfolk Levels Of Effectiveness To Formal Assessment/Inspections As A Predictor Of Atlantic Fleet Shipboard Engineering Readiness, Juan D. Marpuri Jr.

OTS Master's Level Projects & Papers

This research will determine if the changes made as a result of IDTC initiatives have contributed to the levels of training effectiveness and ultimately the afloat commands ability to demonstrate engineering readiness.

Training Programs Used By Small Businesses On The Peninsula Of Hampton Roads, Virginia, Deborah Y. Yehlen

OTS Master's Level Projects & Papers

In order to determine answers to this problem, the following research questions were established: 1. What type of training was used? 2. How does the company make decisions on topics for training? 3. What were topics of recent training? 4. Did employees have any input of their needs for training? If so, how was that accomplished or expressed? 5. Who was responsible for coordinating the training programs? 6. Who delivered the presentations? 7. What were the projections for future needs of training in terms of cost, productivity and manpower?

The Attitudes Of Core Subject Teachers Toward Making Technology Education A Required Subject, Michael C. Hamby

OTS Master's Level Projects & Papers

The goals of this study were to: 1. Ascertain the definition and scope of Technology Education from the perspective of core subject teachers; 2. Gather core subject teachers' opinions concerning the ability of Technology Education to reinforce learning in their content areas; 3. Determine if Technology Education should be a core or required subject.

New Approaches To Gortler And Tollmien-Schlichting Boundary-Layer Instabilities, Vijay Kalburgi

Mechanical & Aerospace Engineering Theses & Dissertations

A detailed understanding of the physical processes that lead to instability and transition in the external viscous boundary layers of airfoils has been the goal of researchers for decades. This study seeks to enhance our understanding of Gortler and Tollmien-Schlichting instabilities through a critical review of prior theoretical methodology and fundamental experiments, the development of dimensionally consistent disturbance equations, and novel interpretation of the resulting flow physics revealed by their solutions to explain the process of transition.

Gortler vortices arise in boundary layers along concave surfaces due to centrifugal effects and these vortices in combination with other instabilities play an …

Boussinesq Model And The Relative Trough Froude Number (Rtfn) For Wave Breaking, Takashi Okamoto

Civil & Environmental Engineering Theses & Dissertations

The relative trough Froude number (RTFN) theory is a new phase-resolving type, wave breaking trigger model introduced by Utku (1999) and Utku and Basco (2002). Based on the moving hydraulic jump concept, this model provides a better implementation of wave breaking in terms of hydrodynamics. Development of computer resources permits the use of the phase-resolving type, Boussinesq wave models in nearshore areas. The Boussinesq equation, however, does not include the physics of wave breaking, so that an additional mechanism is required to initiate wave breaking in the model. The main objective of this study is to develop a new wave …

Developing A Methodology To Detect Partial Failures For Dynamic Systems, Anwar A. Al-Jowder

Engineering Management & Systems Engineering Theses & Dissertations

The purpose of this research is to develop a decision support system that can assist in detecting partial failures in dynamic systems such as Fire Control System Tracking Radar (TR) onboard Naval Ships. Partial failures do not necessarily shut down the system immediately but cause degradation of operational performance. Previous work has shown that experts in the field of failure detection, test point insertion and Built-In-Test Equipment (BITE) can provide useful input in detecting partial failures. Partial failures affect operational system performance and support costs, which can be significant. Often, however, partial failure detection consists of the estimations and opinions …

An Examination Of Personality As A Predictor Of Guard Behavior In A Virtual Environment, Jean M. Catanzaro

Psychology Theses & Dissertations

Military personnel need access to realistic training tools that can provide a safe environment in which to acquire skills that will generalize to real world tasks. A virtual environment (VE) is one such tool. The focus of the present study was to evaluate a VE as a training tool for military guards. The first goal was to examine the potential of VE technology to provide effective training for standing watch at a military checkpoint. The second goal was to study a set of personality traits that might predict performance. Participants completed the NEO Personality Inventory and were trained to perform …

Examining The Equivalence Of Rater Groups In 360-Degree Feedback For Use In Leadership Development, Amy Fitzgibbons

Psychology Theses & Dissertations

This study assessed the seldom-considered aspect of measurement equivalence across the three most common rater groups in 360-degree feedback systems. The graded response model for polytomous items was used to assess differential functioning of items and tests and applied to an archival data set of 664 ratees to determine the equivalence of peer, subordinate, and supervisor ratings of four leadership competencies. The results indicate that the leadership competencies were invariant across the three rater groups. The results and conclusions produced are discussed with practical implications in mind.

Optimal Feedback Control For Ship Roll Motion Under Sea States, Anusit Anmanatarkul

Mechanical & Aerospace Engineering Theses & Dissertations

The primary influences of ship motion are roll motion. The purpose of this dissertation is to discuss a means to reduce the roll amplitude of ship motion in the case of zero forward speed using the roll mitigation device known as the flume tank, or U-tube, tank. Passive control and active control are studied. Optimal feedback control is the designated algorithm for activated roll mitigation device. The assumed model in this study is a submarine chaser. The linear coupled equation of swaying, rolling, and yawing motion of this assumed model is studied. The roll motion of this vessel is investigated …

Life-Extending Control For A Highly Maneuverable Flight Vehicle, Si-Bok Yu

Mechanical & Aerospace Engineering Theses & Dissertations

This dissertation investigates the feasibility and potential of life extension control logic for reducing fatigue within aerospace vehicle structural components. A key underpinning of this control logic is to exploit nonintuitive, optimal loading conditions which minimize nonlinear crack growth behavior, as predicted by analytical fatigue models with experimentally validated behavior. A major simplification in the development of life extension control logic is the observation and justification that optimal stress loading conditions, as described by overload magnitude ratio and application interval, are primarily independent of crack length and therefore, component age. This weak relationship between optimal stress loading and structural age …

Generalized Predictive Control Of Ship Coupling Motions Using Active Flume Tanks, Abdulkarim Mohammed Alotaiwi

Mechanical & Aerospace Engineering Theses & Dissertations

This dissertation uses the Generalized Predictive Control (GPC) approach to design a control system for a ship rolling motion coupled with the sway and yaw using an activated flume tank. GPC is a strategy based on system output prediction over finite horizon known as the prediction horizon. GPC controller is designed from the coefficients of the Autoregressive model with exogenous input (ARX) that are computed directly from input and output data. It computes the future control input based on the cost function with weighted input and output. System identification approach is implemented on the system to find the ARX coefficients …

A Study To Determine The Effectiveness Of The Leadership Learning Website At Bank Of America, Gloria D. Govan

OTS Master's Level Projects & Papers

To solve this problem the following goals were established: 1. Determine the effectiveness of the leadership learning website for Consumer Products leaders at Bank of America; 2. Identify the various learning options that are most frequently used by Bank of America leaders in the Consumer Products lines of business; 3. Recommend web solutions to improve future leadership training of Consumer Products leaders.

Parents' Definition Of Technological Literacy And Their Perceived Attitudes Toward Technological Literacy, Charles L. Thomas

OTS Master's Level Projects & Papers

The research objectives used to guide this problem were: 1. Determine parents understanding of technology 2. Determine parents' attitude towards the effect of technology on society 3. Determine the parents attitude toward technological literacy and the school curriculum.

A Study To Determine The Relationship Between Parent's Work And Their Concern For Their Children Becoming Technologically Literate, Gerald T. Hoover

OTS Master's Level Projects & Papers

This study was used to gain an understanding of parent's concern for their children's technological literacy. The questions established for this research were: 1. Are parents who work in technical fields more concerned about their children's technological literacy than parents who work in non-technical fields? 2. Do parents who work in technical fields have a better understanding of what technology is over parents working in non-technical fields?

A Matlab-Based Upper Division Systems Analysis Course For Engineering Technology, William D. Stanley, Paul L. Kauffmann, Gary R. Crossman

Engineering Technology Faculty Publications

The Department of Engineering Technology at Old Dominion University offers TAC of ABET accredited baccalaureate programs in Civil Engineering Technology, Electrical Engineering Technology, and Mechanical Engineering Technology. All students are required to take traditional courses in algebra and trigonometry, as well as differential and integral calculus, at the freshman and sophomore levels. While these courses provided the necessary basic mathematical skills, it was difficult to justify the traditional upper-division mathematics courses such as differential equations, vector analysis, etc., as appropriate for the special needs of engineering technology students.

To address this issue, the Department has undertaken the development of a …

An Air-Filter Sensor For Home-Used Air Conditioners, Cheng Y. Lin, Gary R. Crossman, Alok K. Verma

Engineering Technology Faculty Publications

This paper presents a successful senior project of instrumentation developed in a Mechanical Engineering Technology senior capstone course. Students were encouraged to approach the problem of designing an air-filter sensor and to propose an optimum and practical solution for the problem. Work includes conceptual design and analysis, implementation, tests and modifications. When an air filter is used in a home air conditioner, inhabitants often forget when to replace it until the cooling or heating capacity is obviously reduced. If the filter remains in service, the efficiency of the cooling/heating system will continue decreasing while the electricity bill will significantly increase. …

Active Learning In Distance Education, Carol Considine, Tony Dean

Engineering Technology Faculty Publications

Although there are many strategies for incorporating active learning exercises into the traditional classroom, incorporating active learning exercises in a distance education delivery format is more challenging. Active learning has been shown to enhance student performance and attitudes when used in conjunction with a traditional lecture format.¹ In order for students to be actively involved they must read, write, discuss, problem solve and engage higher-order thinking tasks such as analysis, synthesis, and evaluation.² The implementation of active learning exercises in distance education classes may help establish student rapport and enhance the feeling of community among the students in …

Anisotropy And Its Relation To Liquefaction Resistance Of Granular Material, Isao Ishibashi, Omer F. Capar

Civil & Environmental Engineering Faculty Publications

This research establishes quantitative relationships between soil's anisotropy and liquefaction resistance for granular materials. Uniform medium density (D_r = 50%) sand specimens were prepared using three different sample preparation techniques (air pluviated (AP), moist tamped (NIT), and moist vibrated (MV)) to create different initial soil fabrics. Undrained cyclic triaxial tests were then performed to determine the liquefaction resistance of each soil specimen. On the same specimens in the triaxial cell, vertical and horizontal compression wave velocities and vertical shear wave velocity (V_s) were measured using piezoelectric bender elements. Anisotropic (transversely isotropic) elastic constants of the soil specimens were …

Numerical Techniques For Excitation And Analysis Of Defect Modes In Photonic Crystals, Shangping Guo, Sacharia Albin

Electrical & Computer Engineering Faculty Publications

Two numerical techniques for analysis of defect modes in photonic crystals are presented. Based on the finite-difference time-domain method (FDTD), we use plane wave incidences and point sources for excitation and analysis. Using a total-field/scattered-field scheme, an ideal plane wave incident at different angles is implemented; defect modes are selectively excited and mode symmetries are probed. All modes can be excited by an incident plane wave along a non-symmetric direction of the crystal. Degenerate modes can also be differentiated using this method. A proper arrangement of point sources with positive and negative amplitudes in the cavity flexibly excites any chosen …

Transmission Property And Evanescent Wave Absorption Of Cladded Multimode Fiber Tapers, Shangping Guo, Sacharia Albin

Electrical & Computer Engineering Faculty Publications

Cladded multimode fiber optic tapers are proposed as chemical sensors using evanescent wave absorption. There is no need to strip the cladding; therefore, fabrication is easy and the taper is mechanically stronger than the taper without cladding. The transmission property and evanescent wave absorption are modeled using ray theory and wave theory, respectively. Effects of some parameters on the absorption sensitivity are analyzed numerically. Due to the presence of the cladding, the taper core is not in direct contact with the external medium, leading to some significant differences from the uncladded one, especially when the index of the external medium …

Simple Plane Wave Implementation For Photonic Crystal Calculations, Shangping Guo, Sacharia Albin

Electrical & Computer Engineering Faculty Publications

A simple implementation of plane wave method is presented for modeling photonic crystals with arbitrary shaped ‘atoms’. The Fourier transform for a single ‘atom’ is first calculated either by analytical Fourier transform or numerical FFT, then the shift property is used to obtain the Fourier transform for any arbitrary supercell consisting of a finite number of ‘atoms’. To ensure accurate results, generally, two iterating processes including the plane wave iteration and grid resolution iteration must converge. Analysis shows that using analytical Fourier transform when available can improve accuracy and avoid the grid resolution iteration. It converges to the accurate results …

Protocols For Disease Classification From Mass Spectrometry Data, Michael Wagner, Dayanand Naik, Alex Pothen

Mathematics & Statistics Faculty Publications

We report our results in classifying protein matrix-assisted laser desorption/ionizationtime of flight mass spectra obtained from serum samples into diseased and healthy groups. We discuss in detail five of the steps in preprocessing the mass spectral data for biomarker discovery, as well as our criterion for choosing a small set of peaks for classifying the samples. Cross-validation studies with four selected proteins yielded misclassification rates in the 10-15% range for all the classification methods. Three of these proteins or protein fragments are down-regulated and one up-regulated in lung cancer, the disease under consideration in this data set. When cross-validation studies …

Implementation Of Gy-Eq For Deterministic Effects Limitation In Shield Design, John W. Wilson, Myung-Hee Y. Kim, Giovanni De Angelis, Francis A. Cucinotta, Nobuaki Yoshizawa, Francis F. Badavi

Mathematics & Statistics Faculty Publications

The NCRP has recently defined RBE values and a new quantity (Gy-Eq) for use in estimation of deterministic effects in space shielding and operations. The NCRP's RBE for neutrons is left ambiguous and not fully defined. In the present report we will suggest a complete definition of neutron RBE consistent with the NCRP recommendations and evaluate attenuation properties of deterministic effects (Gy-Eq) in comparison with other dosimetric quantities.

Lunar Lava Tube Radiation Safety Analysis, Giovanni De Angelis, J. W. Wilson, M. S. Clowdsley, J. E. Nealy, D. H. Humes, J. M. Clem

Mathematics & Statistics Faculty Publications

For many years it has been suggested that lava tubes on the Moon could provide an ideal location for a manned lunar base, by providing shelter from various natural hazards, such as cosmic radiation, meteorites, micrometeoroids, and impact crater ejecta, and also providing a natural environmental control, with a nearly constant temperature, unlike that of the lunar surface showing extreme variation in its diurnal cycle. An analysis of radiation safety issues on lunar lava tubes has been performed by considering radiation from galactic cosmic rays (GCR) and Solar Particle Events (SPE) interacting with the lunar surface, modeled as a regolith …

Electric Field Enhanced Plasmid Delivery To Liver Hepatocellular Carcinomas, Richard Gilbert, Mark J. Jaroszeski, Loree Heller, Richard Heller

Bioelectrics Publications

Electric field enhanced molecular delivery for cancer research and treatment is a new technology that has demonstrated its effectiveness in clinical trials using bleomycin or cisplatin (Heller, R., Gilbert, R., Jaroszeski, M. J. Clinical applications of electrochemotherapy, Advanced Drug Delivery Reviews 35,119-129, 1999), as chemotherapeutic agents. The technology is being investigated in research applications for applicability as a method to enhance gene expression in a target tumor. Success is predicated on an appropriate effective electric field mediated delivery protocol that triggers significant appropriate gene expression duration and levels. An electric field mediated delivery protocol includes a set of conditions …

Chromium Tolerant Microbial Communities From The Chesapeake Bay Watershed, Kristine L. Lowe, Ruth E. Fliflet, Tony Ly, Brenda J. Little, Joanne Jones-Meehan

Virginia Journal of Science

Chromium tolerant bacteria were enumerated from portions of the Chesapeake Bay watershed and examined for their potential to reduce Cr(VI). Water and sediment samples were collected from various locations in Baltimore Harbor and Bear Creek, as well as Sandy Point State Park in Maryland and the Anacostia River in Washington, DC. Samples were spread onto agar plates with CrO₄^2- (5 ppm) as the sole terminal electron acceptor. Plates were incubated anaerobically and colony forming units (CFU) enumerated. CFU arising on minimal-CrO₄^2- medium ranged from 10³-10⁴ mL^-1 or g^-1 and community estimates …

Nato Code Of Best Practice For C2 Assessment, Dave Alberts, Tim Bailey, Paul Choinard, Andreas Tolk, Gary Wheatley, John Wilder

Computational Modeling & Simulation Engineering Books

This major revision to the Code of Best Practice (COBP) for C² Assessment is the product of a NATO Research and Technology Organisation (RTO) sponsored Research Group (SAS-026). It represents over a decade of work by many of the best analysts from the NATO countries. A symposium (SAS-039) was hosted by the NATO Consultation Command Control Agency (NC3A) that provided the venue for a rigorous peer review of the code. This new version of the COBP for C² assessment builds upon the initial version of the COBP produced by SAS-002. The earlier version focused on the analysis of …

Best Student Paper Awards 2001, Virginia Journal Of Science

Virginia Journal of Science

This document is a list of the Best Student Paper Awards granted by the Virginia Academy of Science at the 2001 Annual Meeting.

Study Of Transport Properties Of Inas Using Monte Carlo Simulation, Satyanadh Gundimada

Electrical & Computer Engineering Theses & Dissertations

The present research is aimed at ascertaining the usefulness of InAs semiconductor material for single photon avalanche photo detectors operating in the Geiger mode at 2 μm wavelengths. InAs is considered as the material suitable for the purpose because of its less bandgap and lower effective mass of the electrons when compared to other semiconductor materials presently in use. Hence, theoretically transient transport properties of bulk InAs are superior and the velocity overshoot phenomena stronger. InAs is a relatively less explored material when compared to other materials like GaAs. The choice of the material is justified with thorough exploration of …