Physical Sciences and Mathematics Commons^™

Power Connector, Stephen L. Clark, Joseph B. Shuey, Jose L. Ortega, John B. Brown Iii

Mathematics and Statistics Faculty Research & Creative Works

A pair of mating connectors includes a receptacle having an insulative housing and at least one conductive receptacle contact with a pair of spaced walls forming a plug contact receiving space. The plug connector has an insulative housing and at least one conductive contact having a pair of spaced walls which converge to form a projection engageable in the plug receiving space of the receptacle contact. In each case, the spaced walls are joined by a bridging structure that unites the walls. The plug and receptacle contacts are retained in the respective housings by engagement of opposed lateral edge portions …

Corrected Article: Exclusive Electroproduction Of ᵠ Mesons At 4.2 Gev [Physical. Rev. C 63, 065205, (2001)], M. Bektasoglu, L. Ciciani, G. E. Dodge, T. A. Forest, C. E. Hyde-Wright, S. E. Kuhn, L. M. Qin, F. Sabatié, L. B. Weinstein, Et Al., The Clas Collaboration

Physics Faculty Publications

We studied the exclusive reaction ep → e' p' ᵠ using the ᵠ →K⁺K^- decay mode. The data were collected using a 4.2 GeV incident electron beam and the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. Our experiment covers the range in Q² from 0.7 to 2.2 GeV²and W from 2.0 to 2.6 GeV. Taken together with all previous data, we find a consistent picture of ᵠ production on the proton. Our measurement shows the expected decrease of the t slope with the vector-meson formation time c Δ t …

Assessment Of Metals Pollution In Sediments Of The Coastal Area, U.A.E, By Nawal Mubarak Al Qubaisi

Theses

The present study aims at the quantifying and assessment of heavy metals concentrations and pollution in the offshore sediments, off Abu Dhabi, Dubai and Sharjah. Thirty three samples were collected and subjected to grain size analysis, organic carbon and total carbonate determinations, mineralogical analysis and heavy metals (leachable and residual phasis) determination.

The contents of organic carbon of the study areas vary within a wide range. The maximum was recorded at Abu Dhabi and the minimum at Dubai. There is a trend of increasing organic carbon with the decrease of grain size. In contrast to organic carbon, carbonate contents in …

Determination And Catalytic Degradation Of Some Pesticides In Selected Agriculture Environment, Khalid Mutasim Al Magboul

Theses

Buprofezin [2-[(1, 1-dimethylethyl)imino]tetrahydro-3-(1-methylethyl)-5-phenyl-4H-1,3,5-thiadiazin-4-one] is a thiadiazine insect regulator and molting inhibitor that has a persistent larvicidal action against some Coleoptera and Hemiptera and effectively controls harmful insect pests including the brown rice planthopper Nilaparvata lugens and the greenhouse whitefly Trialeurodes vaporaiorum. However, amitraz (IUPAC name: N-methylbis(2,4-xylyliminomethyl) amine belongs to the family of the triazapentadienes. It is a non-systemic acaricide and insecticide which has contact and respiratory action. Amitraz is active against a wide range of larvae and phytophagous insects. Its properties have long been known. Additionally, amitraz is often used against varroasis disease, caused by the mite Varroa Jacobsoni and …

Development Of A Networked Interactive Information Environment Within A National Park, John Clifton

Theses

For the most part, the Killarney National Park (KNP) currently disseminates information to visitors in paper format and by word of mouth in a non-coherent fashion. Society as a whole is moving towards an Information Age delivered through an electronic medium. This project aims to facilitate the KNP in delivering a new electronically presented information experience to its global visitors.

Electronic media facilitate the delivery of in-depth multimedia as well as multilingual information. This information will be made available on demand to visitors and delivered through a variety of media including information points and handheld devices to facilitate the various …

Application Of Geophysical, Hydrogeologic L And Gis Techniques For Investigation Of Groundwater Resources In The Al Dhaid Area, Uae, Mohamed Mustafa Mohamed Al Mulla

Theses

No abstract provided.

A Facile And Efficient Method For The Rearrangement Of Aryl-Substituted Epoxides To Aldehydes And Ketones Using Bismuth Triflate, Ram Mohan, Kaushik Bhatia, Kyle Eash, Nicholas Leonard, Matthew Oswald

Scholarship

Aryl-substituted epoxides undergo smooth rearrangement in the presence of 0.01–0.1 mol% Bi(OTf)3•xH2O. The rearrangement is regioselective with aryl-substituted epoxides, and products arise from cleavage of the benzylic C―O bond. The highly catalytic nature of this method coupled with the fact that the reagent is relatively non-toxic, easy to handle and inexpensive make it an attractive alternative to more corrosive and toxic Lewis acids, such as BF3•Et2O, currently used to effect epoxide rearrangements.

The Discovery-Oriented Approach To Organic Chemistry. 5. Stereochemistry Of E2 Elimination: Elimination Of Cis- And Trans-2-Methylcyclohexyl Tosylate, Ram Mohan, Marcus Cabay, Brad Ettlie, Adam Tuite, Kurt Welday

Scholarship

The E2 elimination is one of the most important reactions in organic chemistry and is discussed in considerable detail in a sophomore organic course. We have developed a discovery-oriented lab that illustrates the stereochemistry of the E2 elimination reaction and is a good exercise in 1H NMR spectroscopy. The added element of discovery insures that student interest and enthusiasm are retained.

Deprotection Of Ketoximes Using Bismuth(Iii) Nitrate Pentahydrate, Ram Mohan, Bryce Nattier, Kyle Eash

Scholarship

Ketoximes undergo facile deprotection in acetone-H20 (9: 1) in the presence 01' 0.5 equivalents of Bi(N03h•5H20. Bismuth(III) nitrate is relatively non-toxic, insensitive to air and inexpensive. These features coupled with the use of a relatively nontoxic solvent system make this method an attractive alternative to existing routes for deprotection of ketoximes.

How To Evaluate An On-Road Remote Sensor, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

All on-road remote sensors or which we are aware carry out at least a measurement of the CO/CO2 ratio in the exhaust of a passing vehicle. It is possible for an interested party to carry out a quantitative evaluation of the precision of this measurement. This evaluation can be done without going to the expense and complexity of an on-road audit using a vehicle of known emissions (wet gas audit), or a vehicle designed to puff surrogate compressed gas mixtures of known ratios (dry gas audit). The measurement of exhaust CO/CO2 ratio is obtained by estimating the slope of a …

On-Road Remote Sensing Of Automobile Emissions In The Phoenix Area: Year 2, Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

The University of Denver conducted a five-day remote sensing study in the Phoenix, AZ area in the fall of 1999. The remote sensor used in this study is capable of measuring the ratios of CO, HC, and NO to CO2 in motor vehicle exhaust. From these ratios, we calculate mass emissions per kg (or gallon) of fuel and the percent concentrations of CO, CO2, HC and NO in motor vehicle exhaust which would be observed by a tailpipe probe, corrected for water and any excess oxygen not involved in combustion. The system used in this study was also configured to …

Controlling The Optical Properties Of A Conjugated Co-Polymer Through Variation Of Backbone Isomerism And The Introduction Of Carbon Nanotubes, A. Dalton, J. Coleman, M. In Het Panhuis, B. Mccarthy, A. Drury, W. Blau, J. Nunzi, Hugh Byrne

Articles

The need to control the formation of weakly emitting species in polymers such as aggregates and excimers, which are normally detrimental to device performance, is illustrated for the example of the polymer poly(m-phenylenevinylene-co-2,5-dioctyloxy-p-phenylenevinylene), using the model compound, 2,5-dioctyloxy-p-distyrylbenzene as a comparison. Two different methods, namely a Homer-Emmons polycondensation in dimethylformamide (DMF) and a Wittig polycondensation in dry toluene, have been used during synthesis resulting in a polymer with a predominantly trans-vinylene backbone and a polymer with a predominantly cis-vinylene backbone, respectively. Photoluminescence and absorption spectroscopy indicate that the polymer forms aggregate species in solution with spectra that are distinctly red-shifted …

A Review Of The Different Methods For Assessing Standing Balance, Jacinta Browne, N. J. O'Hare

Articles

This paper is a review of the balance assessment methods currently used to evaluate standing balance. Most of the presently available instrumentation appears to be more suited to research laboratories than to routine clinical situations. Functional assessments of balance appear to be the quickest test to administer and do not require expensive equipment however only gross changes in balance can be detected making them suitable as a screening tool for identifying subject’s needing more thorough evaluation. Force platforms appear to be most suited balance assessment instrumentation to the clinical situation since it produces a real time display and can detect …

E-Spatial Technology For Spatial Analysis And Decision Making In Web-Based Land Information Management Systems, James Carswell

Articles

In this paper we describe e-SpatialTM technology, comprising an innovative software solution for deploying integrated web-based spatial applications within Oracle 9i Database environments. The two main components of the solution are the iSMARTTM database development technology and the i-SpatialTM Information Server (iSIS). This technology allows Oracle users to build and deploy both spatially enabled and standard Internet applications without requiring any application-specific GIS source code. It can be deployed on any Oracle supported hardware platform and on any device running a Java Virtual Machine, thus providing full support for wireless, PDAs and other mobile devices. In particular, we describe a …

Mcnair Research Journal

Georgia Southern University McNair Scholars Journal (Archived)

• Comparing Aerobic And Anaerobic Physical Activity Utilizing A Three Site Skinfold Shawnae Allen

• Theory, laser light, and the adiabatic approximation Shannon Anderson

• Perceptions Of Elementary Gifted Students Kalesha Brown

• Population Structure Of The Blacklegged Tick, Ixodes Scapularis, In Eastern United States Using Microsatellite DNA Markers Shahnjayla K. Connors
  

• The Growing Minority: A Study Of Local Reactions To The Increasing Latino Population In Southeast Georgia Miranda Davis
  

• Assessing The Economic Impact Of The School Information Technology At Georgia Southern Mary Dowling
  

• The Desegregation of Law Enforcement in a Rural Community: Statesboro, Georgia Ebony Starla Halliburton
  

• Understanding The Racial Gap In Healthcare: …

Machine Learning In Euchre: A Comparison Of Techniques, Michael J. Holmes

Dissertations and Theses @ UNI

This study compares the effectiveness of inductive and analytical learning techniques for a specific type of problem. The set of problems has a large number of parameter combinations as inputs, and a small set of possible output solutions. The card game, Euchre, was the basis for research. Four algorithms were used for comparison. Two were variants of induction using decision tree learning, and the other two used variants of explanation-based learning, an analytical approach. The example data were gathered from human players, along with one set of random, "noisy" data. These data were then used as training sets for the …

Slope Control In Western Boundary Currents, Sang-Ki Lee, J. L. Pelegri, John Kroll

Mathematics & Statistics Faculty Publications

An analytic solution is presented for the steady-state depth-averaged western boundary current flowing over the continental slope by combining three highly idealized models: the Stommel model, the Munk model, and the arrested topographic wave model. The main vorticity balance over the slope is between planetary vorticity advection and the slope-induced bottom stress torque, which is proportional to rv(h^-1)_x where r is the Rayleigh friction coefficient, h is the water depth, and v is the meridional velocity. This slope-induced torque provides the necessary source of vorticity for poleward flow over the slope, its simple interpretation being …

On Moment Inequalities And Stochastic Ordering For Weighted Reliability Measures, Broderick O. Oluyede, Mekki Terbeche

Mathematical Sciences: Faculty Publications

We obtain stochastic inequalities, error bounds, and classification probability for a general class of distributions. We introduce the notion of variability ordering via the probability functional and comparisons made for the weighted and the original distributions. We present moment inequalities, comparisons, and applications.

On Stochastic Comparisons Of Energy Functions With Applications, Broderick O. Oluyede

Mathematical Sciences: Faculty Publications

We develop simple methods for the stochastic comparisons of informational energy functions. We introduce modified informational energy functions and uncertainty of parameter functions are introduced for models with realistic parameter spaces. We present inequalities, comparisons, and applications including test procedures for testing the equality of informational energy functions. Some illustrative examples are also presented.

Electric Field Controlled, Pulsed Autoionization In Two Electron Wave Packets, J. Greg Story, Heider N. Ereifej

Physics Faculty Research & Creative Works

In this paper, control of the evolution of a two electron wave packet through the application of a static electric field is demonstrated. Specifically, application of a small electric field is used to produce pulsed autoionization events, the timing of which can be controlled on a picosecond time scale. The technique is demonstrated by exciting calcium atoms using a short-pulsed laser to the 4p_3/219d doubly excited state, which is energy degenerate with the 4p_1/2nk stark states. Evolution of the resultant wave packet is monitored through the application of a second short laser pulse, which stimulates the …

Structural, Electronic, And Magnetic Properties Of Lani₅₋ₓtₓ (T = Fe, Mn) Compounds, Jinbo Yang, Chiu-Ying Tai, G. K. Marasinghe, George Daniel Waddill, Oran Allan Pringle, William Joseph James, Y. Kong

Physics Faculty Research & Creative Works

Structures and magnetic properties of the LaNi_5-xFe_x and LaNi_5-xMn_x compounds have been investigated using neutron diffraction and first-principles tight-binding-linear-muffin-tin-orbital methods. Both neutron diffraction refinement data and total energy calculations show that the Fe and Mn atoms preferentially occupy the 3g sites in the hexagonal CaCu₅-type structure. The calculated magnetic moments of Fe and Ni atoms are of 2.4-2.5μ_B and 0.2-0.5μ_B in LaNi_5-xFe_x, respectively. The magnetic structure exhibits more localized moments at Fe atoms in LaNi_5-xFe_x when x ≤ 1.0. Electronic structure calculations indicate …

Electronic Structures And Magnetism Of Lani₅₋ₓfeₓ Compounds, Jinbo Yang, Chiu-Ying Tai, G. K. Marasinghe, George Daniel Waddill, Oran Allan Pringle, William Joseph James

Physics Faculty Research & Creative Works

A systematic study of the magnetic moments and hyperfine interactions of the LaNi_5-xFe_x compounds was performed using the spin-polarized tight-binding-linear-muffin-tin-orbital methods (TBLMTO). The calculated results were compared with neutron diffraction and Mössbauer experimental data and found to be in good agreement. Fe atoms exhibit more localized magnetic moments in LaNi_5-xFe_x when the Fe content x is lower than 1.0. The calculated magnetic moments of the Fe atoms approach values as large as 2.5μ_B due to the dilution effect. The strong s-d hybridization between the Ni and La atoms and the neighboring Fe in …

Dynamics Of The Fragmentation Of D2 By Fast Protons And Slow Highly Charged Xe26+, I. Ali, Robert D. Dubois, C. L. Cocke, S. Hagmann, C. R. Feeler, Ronald E. Olson

Physics Faculty Research & Creative Works

Using recoil-ion momentum spectroscopy, combined with a multihit detector system, the full momentum vectors of both fragment ions produced by fragmentation of D₂ by fast 50-kV protons and slow (9.56–0.191 keV/u) keV/u! Xe²⁶⁺ ions have been measured. The data are kinematically complete and make it possible to separate the laboratory momentum of the center of mass of the molecule from the momentum of each fragment in the center-of-mass system of the molecule. Using this separation, we find that, for higher collision velocities, the overall reaction can be described as double-electron capture, followed in a second and separate step …

Magnetization And Heat Capacity Of R1/3sr2/3feo3-Δ (R = La And Pr), V. P.S. Awana, M. Karppinen, H. Yamauchi, S. K. Malik, William B. Yelon, Apurva Mehta, A. V. Narlikar

Physics Faculty Research & Creative Works

Results of magnetization and heat capacity (CP) measurements are presented for R₁/₃Sr₂/₃FeO_3-δ compounds with R = La and Pr. The change in entropy (ΔS) near the magnetic transition amounts to only 15% of the theoretically expected value for the Fe³⁺ or Fe⁵⁺ spins magnetic ordering. The lower value of ΔS is explained on the basis of reported Mössbauer studies, which revealed a substantial amount of nonmagnetic Fe⁴⁺ in the compound across the magnetic transition. The C_P peak height across the magnetic transition increases substantially after annealing the …

Crystal And Magnetic Structure Of Pr0.7sr0.3-Xmno3 (0 ≤ X ≤ 0.2) Compounds, Q. Cai, William B. Yelon, M. Ellouze, W. Boujelben, A. Cheikh-Rouhou

Physics Faculty Research & Creative Works

The electronic and magnetic properties of the ABO3 type manganite's (A = rare earth, B = Mn) depend sensitively on the ratio of divalent and trivalent atoms on the A sublattice. The substitution of rare-earth by Ca or Sr not only affects the total valence, but also the lattice spacing, which, in turn may affect the structure and magnetic ordering temperature. If these compounds are synthesized with less than stoichiometric amounts of the A site constituents, (relative to the Mn content), three possible outcomes may be considered: a) single phase materials with vacancies on the A sublattice may be formed, …

A Neutron Diffraction Study Of The Deuterium Site Occupancy In Nd5fe17d15.5, Z. Chu, William B. Yelon, R. K. Murakami, P. S.M. Da Silva, V. Villas-Boas, F. P. Missell

Physics Faculty Research & Creative Works

The intermetallic compound Nd₅Fe₁₇ has potentially important magnetic properties and is being investigated as a possible permanent magnetic material. As with many other rare-earth transition metal compounds, this phase can absorb significant quantities of H(D) and lesser amounts of N. Gravimetric measurement indicate that ∼14-16H(D) atoms can be absorbed per formula unit leading to roughly a 20% increase in saturation magnetization and Curie temperature. We have carried out powder neutron diffraction studies to determine the location of D atoms in a sample of Nd₅Fe₁₇ containing approximately 15.5D/f.u. The large, complex unit cell of Nd …

Storage Free Terrain Simulation, Warren Creemers

Theses : Honours

Landscape visualisation is the process of recreating a natural environment and displaying it in an interactive graphical simulation. To do this a terrain is displayed together with accompanying plant life and other objects. Present landscape visualisation software is capable in theory of displaying very detailed and large landscapes. The software is also in theory capable of simulating environments with thousands if not millions of individually structured plants. In practice though, the simulation of such landscapes requires such a large amount of storage space that it is not achievable on personal computers. Even storing small landscapes with a moderate amount plant …

Mine Dewatering In Arid, Saline Environments In Western Australia: The Response Of Biota Emerging From Rehydrated Sediments, Charelle Harkins

Theses : Honours

Mine dewatering is a critical part of the mining process to prevent flooding of underground or open pits, to allow for the excavation of the available resources. Groundwater is abstracted from underground pits to the surface through extraction bores. The issue of where to discharge the excess water is a major concern. The use of natural wetlands is one option for mine water discharge. Saline lakes in arid areas are ideal receiving environments for discharge options, acting as evaporation facilities for the storage and disposal of excess mine water. Mine water discharge into ephemeral lake systems modifies the volume of …

Adequacy Of Terrestrial Fauna Surveys For The Preparation Of Environmental Impact Assessments In The Mining Industry Of Western Australia [Thesis], Jason L. Fraser

Theses : Honours

The Environmental protection Authority has indicated that terrestrial fauna surveys as undertaken for the purpose of preparing Environmental Impact Assessment (EIA) are not providing adequate information to enable decision-makers to assess development impacts on biodiversity and ecosystems. In the absence of a protocol to assess current standards of terrestrial fauna surveys, 'best practice' was defined through discussions held with an 'expert panel', and quantified through a questionnaire. This study examined current standards of terrestrial vertebrate fauna surveys, prepared for the purpose of EIA, with 'best practice' as defined by relevant expert opinion. Strengths and weaknesses of terrestrial fauna surveys were …

Annual Meeting Of The Iowa Academy Of Science

Journal of the Iowa Academy of Science: JIAS

No abstract provided.