Physical Sciences and Mathematics Commons^™

Roveacrinids From Northern Arabian Plate In Se Turkey, Anna Farinacci, Riccardo Manni

Turkish Journal of Earth Sciences

Crinoid remains from Cenomanian limestones in SE Anatolia have been studied. These crinoids belong to the family Roveacrinidae and are characterised by their lacking a stem and free living above the sea floor. A new species, Roveacrinus derdereensis Manni, n. sp., has been erected.

Mineralogy And Geochemistry Of Melilite Leucitites, Balçıkhisar, Afyon (Turkey), Cüneyt Akal

Turkish Journal of Earth Sciences

The Middle Miocene Afyon volcanic complex crops out in west-central Anatolia and comprises products of extensive potassic-ultrapotassic volcanic activity that intrude and/or cover the sedimentary formations of the western Taurides. Based on their stratigraphic setting, three stages of potassic and ultrapotassic volcanism are distinguishable. Melilite-leucitite lavas are the products of the first stage and followed by lamproites that represent the second stage of volcanism. The leucitite block- and fragment-rich Balçıkhisar volcaniclastic succession overlies the products of the first and second stage volcanism. Lacustrine sedimentary rocks cover the products of first and second stage volcanism. Lacustrine sedimentary rocks are gradationally overlain …

Absorption Spectroscopy Of Colored Dissolved Organic Carbon In Georgia (Usa) Rivers: The Impact Of Molecular Size Distribution, Yosef Z. Yacobi, James J. Alberts, Monika Takacs, Michelle Mcelvaine

Ocean Engineering and Marine Sciences Faculty Publications

Dissolved organic carbon (DOC) was collected in six rivers that transect the coastal plain of Georgia in July 1999 and February 2000. DOC concentrations ranged from 4.9 to 40.7 g m-3 and from 7.1 to 40.5 g m-3, respectively. The absorption coefficient at 440 nm was highly correlated with DOC concentration, suggesting that the optical parameter may be utilized for rapid estimation of DOC in these waters. The isolated DOC was separated into fractions of operationally defined molecular size, using an ultrafiltration technique that yielded three fractions: <10 ("small"), 10-50 ("medium") and >50 ("large") kilodalton. The smallest fraction was the most abundant (>50%) in …

Geology And Hydrothermal Alteration Of The Aydın-Salavatlı Geothermal Field, Western Anatolia, Turkey, İsmai̇l Hakki Karamanderesi̇, Cahi̇t Helvaci

Turkish Journal of Earth Sciences

The Aydın-Salavatlı geothermal field is located in the middle part of the Büyük Menderes Graben, and is characterized by normal-fault structures. The stratigraphic sequence of the Aydın-Salavatlı geothermal field consists of metamorphic rocks of the Menderes Massif and sedimentary rocks deposited during the rifting period of the Menderes Massif in the Miocene. Geological data suggest that there is a connection between tectonic development and periods of hydrothermal alteration. Hydrothermal alteration in the Aydın-Salavatlı geothermal field occurred in five distinct periods, and all are related to different stages of faulting systems, from the Middle Miocene up to the present. The first …

Modeling Nonintersective Adjectives Using Operator Logics, Paul Bankston

Mathematics, Statistics and Computer Science Faculty Research and Publications

Our topic is one that involves the interface between natural language and mathematical logic. First-order predicate language/logic does a good job approximating many parts of (English) speech, i.e., nouns, verbs and prepositions, but fails decidedly when it comes to, say, adjectives. In particular, it cannot account for the quite different ways in which the adjectives green and big modify a noun such as chair. In the former case, we can easily view a world in which the class of green chairs is the intersection of the class of green things with the class of chair-things. By contrast, the way …

Adaptive Critic Neural Network-Based Controller For Nonlinear Systems With Input Constraints, Pingan He, Sarangapani Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

A novel adaptive critic-Based multilayer neural network (NN) controller in discrete-time is designed to deliver a desired tracking performance for a class of nonlinear systems in the presence of magnitude constraints on the input. Reinforcement learning scheme in discrete time is proposed for the NN controller, where the action generating NN learning is performed based on a certain performance measure, which is supplied from a critic. using the Lyapunov approach and with a novel weight update, the uniform ultimately boundedness (UUB) of the closed loop tracking error and weight estimates are shown. the adaptive critic NN does not require an …

2003 Program And Abstracts, University Of Dayton. Department Of Mathematics

Undergraduate Mathematics Day: Programs, Lectures, Promotional Materials

Program and abstracts of papers presented at the 2003 Undergraduate Mathematics Day at the University of Dayton

2003 Undergraduate Mathematics Day Poster, University Of Dayton. Department Of Mathematics

Undergraduate Mathematics Day: Programs, Lectures, Promotional Materials

Poster of Undergraduate Mathematics Day events held Saturday, November 1, 2003.

Curvature (Abstract), Chikako Mese

Undergraduate Mathematics Day: Programs, Lectures, Promotional Materials

We may have an intuitive idea of what it means for surfaces to be curved, but what does it mean for higher dimensional spaces to be curved?

On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 4, January 2003, Daniel A. Burgard, Gary A. Bishop, Mitchell J. Williams, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Labrea Area: Year 2, Mitchell J. Williams, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Phoenix Area: Year 4, November 2002, Gary A. Bishop, Daniel A. Burgard, Mitchell J. Williams, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

The Synthesis Of 2-(1-Indenyl)-Phenol: A Potential Ligand For Metallocene Polymerization Catalysts; And, Ω-Iodoalkyl(Methyl) Malonate Esters: Synthesis And Application In Bioconjugate Chemistry, Sara E. Bendler

Masters Theses

Chapter I:

Metallocene catalysis is an important division of polymerization chemistry. The design of appropriate ligands for metallocene catalysts has focused on stereochemical control and structural diversity. The synthesis of the potential ligand 2-(1-indenyl)-phenol has been developed. Indenyl phenol ligands offer advancements over cyclopentadienyl ligands because the steric and electronic properties of the catalyst could be tailored to suit individual polymerization reactions. 2-(1-Indenyl)-phenol was synthesized with an overall yield of 4% and characterized with ¹H NMR and ¹³C NMR.

Chapter II:

A large percentage of breast malignancies overexpress the nuclear estrogen receptor (ER) protein. Binding to nuclear receptors …

Phosphido-Bridged Complexes Linked By Unsaturated Phosphines, Yong Liu

Masters Theses

Di(p-tol)phosphido-bridged complexes, (OC)₄M[μ-P(p-tol)₂]₂M(CO)₄ (M = Mo, W), have been synthesized for the first time. These have been obtained from the reaction of (OC)₅MP(p-tol)₂H with BuLi, followed by air oxidation. The choice of solvent is very important as the intermediate anion, [(OC)₅MP(p-tol)₂] is unstable in THF. An ideal solvent for these preparations is CH₃OCH₂CH₂OCH₃ (monoglyme) from which yields of 68% and 76% were realized for the tungsten and molybdenum complexes, respectively. …

Dynamic Nonlinear Effect On Lasing In Random Media, B. Liu, Alexey Yamilov, Y. Ling, J. Y. Xu, Hui Cao

Physics Faculty Research & Creative Works

We investigate the dynamic effect of nonlinearity on lasing in disordered medium. The third-order nonlinearity not only changes frequency and size of lasing mode, but also modifies laser emission intensity and laser pulse width.

Postcollisional Decay In Ne Multiple Ionization By H2+ Ions In Breakup Collisions, M. M. Sant'anna, H. Luna, Antonio C. Santos, C. Mcgrath, M. B. Shah, E. G. Cavalcanti, G. M. Sigaud, E. C. Montenegro

Physics Faculty Research & Creative Works

We measured the Ne^q+ charge-state yield distribution for Ne atoms multiply ionized by 1-MeV/amu H₂⁺ in coincidence with the final state of the projectile, for both breakup and Non breakup channels. Measurements with 1-MeV H⁺ projectiles were also performed. While the H₂⁺ Non breakup channel produces results similar to equal-velocity proton or electron projectiles, the breakup channels lead to a charge-state yield distribution very close to the known Ne 2s^-1 post collisional decay distribution, measured through photoionization [T. A. Carlson, W. E. Hunt, and M. O. Krause, Phys. Rev. 151, 41 (1966)]. This …

Electron Loss From 0.74- And 1.4-Mev/U Low-Charge-State Argon And Xenon Ions Colliding With Neon, Nitrogen, And Argon, Robert D. Dubois, Antonio C. Santos, Ronald E. Olson, Th Stöhlker, F. Bosch, A. Bräuning-Demian, A. Gumberidze, S. Hagmann, C. Kozhuharov, R. Mann, A. Oršić Muthig, U. Spillmann, S. Tachenov, W. Barth, L. Dahl

Physics Faculty Research & Creative Works

Absolute total-, single-, and multiple-electron-loss cross sections are measured for (Ar⁺-, Ar²⁺-, Xe³⁺)-~Ne, N₂ Ar) collisions at 0.74 and 1.4 MeV/u. in addition, a many-body classical trajectory Monte Carlo model was used to calculate total- and multiple-electron-loss cross sections for Ar⁺ impact. for N₂ and Ar targets, excellent agreement between the measured and calculated cross sections is found; for the Ne target the experimental data are approximately 40% smaller than the theoretical predictions. the experimental data are also used to examine cross-section scaling characteristics for electron loss from fast, low-charge-state, heavy …

Synthesis And Characterization Of A Polypyridyl Ru(Ii)-Alloxazine Complex For Adsorption On Tio2-Coated Ito Electrodes, Manisha A. Patel

Masters Theses

TiO₂-coated conducting glass electrodes can be modified by attachment of redox-active molecules to the TiO₂ surface. This thesis describes the synthesis and characterization of a polypyridyl Ru(II) complex that can be covalently bound to a TiO₂ surface through the carboxylate groups of 2,2'-bipyridine-4,4' -dicarboxylic acid, H₂dcbpy. In addition, the bound complex contains a redox-active alloxazine derivative, pptd, which is capable of 2e^-/2H⁺ transfers. Thus the TiO₂-coated electrode is modified with a transition metal complex capable of shuttling H-atoms to substrates in solution. Synthesis of the PF₆^- salt …

Anthropogenic-Induced Changes To Weather And Climate: An Overview, Robert Cataneo

Masters Theses

Human activities, since the beginning of the Industrial Revolution, have caused measurable and significant changes to local and regional weather and climate, as well as to global climate.

There is substantial evidence to show that anthropogenic influences have caused statistically significant changes to local and regional weather and climate, and have played a major role in the 0.6°C increase in global, low level temperature observed in the last 100 years. There is also an abundance of data that establishes a causal relationship between the 32% increase in atmospheric CO₂ concentration that has occurred since the beginning of the Industrial …

Dmap As A Catalyst For Carbon Acylation: Elucidation Of Mechanistic Pathway, Including Spectral Characterization Of The Putative Reactive Intermediate, Jagadish K. Boppisetti

Masters Theses

3-Phenylbenzofuranone, when deprotonated with sodium hydride, forms an extended enolate system which, when treated with excess alkyl chloroformates, affords only oxygen-acylated products, as opposed to the usually desired carbon-functionalized derivatives. It was discovered that such molecules, when treated with a catalytic amount of 4- (N, N-dimethylamino)pyridine (DMAP), rearrange quantitatively to the carbon acylated isomers.

These migrations, which are accompanied by a deep blue color, are proposed to involve a reactive intermediate. This intermediate, which is postulated as an ion pair charge transfer (IPCT) complex, has been closely studied in order to gain a better understanding of the …

Chlorobenzenes And Chloronitrobenzenes Interaction With Iron (O), Manuel Alejandro Serratos

Masters Theses

Degradation of chlorobenzene, dichlorobenzenes and chloronitrobenzenes (ClB, x-Cl2B and x-ClNO2B) was tested by trying to make them react with metallic iron, Fe (0), in water solvent.

The experiments consisted of optimizing the parameters of the reactions (like minimum mass of iron needed) and analytical detection conditions. Analytical techniques used were gas and liquid chromatography (GC and HPLC), mass spectrometry (MS) and UV-Vis spectroscopy.

No substances other than the initial ClB and x-Cl2B were detected in their tests with Fe (0) after shaking for periods of up to three days, although 10%weight average decreases in concentration were observed.

The ClNO2B isomers …

Study Of Nanoidentation And Tip Geometry In Gaas (100) At Ultra-Low-Loads For The Patterning Of Quantum Dots, Robin Prince

Inquiry: The University of Arkansas Undergraduate Research Journal

In this study, nanoindentations were produced and characterized for the future patterning of quantum dots. Nanoindentation was performed on a Si-doped (n-type) Vertical Gradient Freeze (VGF) GaAs (100) wafer with a 700 nm GaAs (100) layer grown by molecular beam epitaxy (MBE). Nanoindentation was performed with a Berkovich diamond tip, a cube corner diamond tip, and a 600 conical diamond tip. Nanoindentation of GaAs has been studied in the past, but not at extremely low loads. Previous research has been done on high load (50-200 mN) and low load (200-8000 mN) nanoindentation. The applied load in this study ranges from …

Channel Geomorphology And Restoration Guidelines For Springfield Plateau Streams, South Dry Sac Watershed, Southwest Missouri, John M. Horton

MSU Graduate Theses

Land-use change, both historical and present, has been a source of channel degradation within Ozark streams. This study examines the influence of land use on channel morphology within the South Dry Sac Watershed which drains 78.5 km2. The main objectives of this study are to: (1) perform a geomorphic assessment of stream channel and sediment characteristics; (2) evaluate the effects of watershed factors on channel morphology and dynamics; (3) quantify the geomorphic relationships for use in stream restoration projects in the Springfield Plateau area. Thirty-six reaches were surveyed and evaluated in the field for channel cross-sectional geometry, longitudinal profile, and …

Microbial Dynamics And Biogeochemistry In The North Pacific Subtropical Gyre, Matthew J. Church

Dissertations, Theses, and Masters Projects

The research presented in this dissertation describes the influence of planktonic bacterial growth on upper ocean organic matter dynamics in the North Pacific Subtropical Gyre (NPSG). Examination of the temporal dynamics in dissolved organic matter (DOM) was coupled with investigations that targeted the influence of heterotrophic bacterial production (HBP) on organic matter fluxes in the NPSG. Nine cruises to the Hawaii Ocean Time-series field site Station ALOHA revealed that HBP accounted for a large flux of organic carbon in the upper ocean of the NPSG. HBP was significantly enhanced by sunlight, with photoenhancement of HBP accounting for 3.2 mol C …

Effects Of Sediment Characteristics On The Distribution Of Fiddler Crabs (Uca Spp) At Goodwin Island, Virginia, Landon Alan Ward

Dissertations, Theses, and Masters Projects

No abstract provided.

Synthetic And Mechanistic Studies Of Poly(Vinyl Chloride) And Some Other Chlorinated Polymers, Xianlong Ge

Dissertations, Theses, and Masters Projects

Unlike vinyl chloride, 1,2-dichloroethylene (DCE) experienced dimerization under free-radical conditions. Chain transfer to DCE by beta-Cl elimination was shown to be the major reason for its nonpolymerization.;During the chlorination of alkyl chlorides with molecular chlorine, the involvement of a bridged intermediate led to the formation of vicinal chlorides as the major products. The yields of geminal chlorides increased significantly in the presence of solvents that form complexes with chlorine atoms, but such solvents also decreased the reactivity of the chlorination. Thus the chlorination of poly(vinyl chloride) (PVC) in the presence of complexing solvents was not a useful method for the …

Domain And Type Enforcement In Linux, Serge Edward Hallyn

Dissertations, Theses, and Masters Projects

Domain and Type Enforcement (DTE) is a simple and well-known access control system, which has been used at the microkernel level in SPIN, the kernel level in Unix, and the user-space library level in CORBA. This work implements DTE as a Linux Security Module, and provides tools for the composition and analysis of policies. The goal is to bring Mandatory Access Control in Linux to the level of ease of use of cryptography tools and libraries.;Tools have been created to edit DTE policies and query transitions through different privilege levels. A subtle modification of the Bell LaPadula (BLP) access control …

A Comparative Analysis Of Design Techniques For The Construction Of An Expert System For Aircraft Engine Diagnostics, Mitch Raton

CCE Theses and Dissertations

The lack of knowledge and understanding of diagnostic aircraft propulsion systems causes inappropriate problem diagnosis. Because of increasing complexity, technicians are incapable of performing the necessary tasks in accordance with standard regulations. More sophisticated systems are needed today to "assist" the user technician in decision-making. This work provided a study of rule-based and frame-based expert system techniques to determine the most appropriate solution in the domain of complex diagnosis using large amounts of deterministic data. The study produced a framework that facilitates the diagnosing of faults on aircraft engines, thus reducing the burden on the aircraft mechanic regardless of experience …

An Integrated, Secured, Open-Source Medical Prototype For Collaborative Patient Management On The Internet, Joseph Dabre Ramsey

CCE Theses and Dissertations

Conventional approaches to building critical and secured systems are based on the use of commercial tools for development and maintenance. Changes in the marketplace and the acceptance of the open-source model have brought this assumption into question. The combination of open-source's rapid rise and the introduction of pervasive computing has made the computing industry more receptive to open-source tools and products. The open-source model allows systems to be controlled by a single individual or a small developer group that reduces dependence on individual experts. The availability of free system source codes, an expanding commercial support market, and increasing global collaborative …

Finding Unexpected Events In Staring Continuous-Dwell Sensor Data Streams Via Adaptive Prediction, Peter G. Raeth

CCE Theses and Dissertations

This research produced a Predictive Anomaly Detector (PAD). It is an adaptive prediction-based approach to detecting unexpected events in data streams drawn from staring continuous-dwell sensors. The underlying technology is spectrum independent and does not depend on correlated data (neither temporal nor spatial) to achieve improved detection and extraction in highly robust environments. ("robust environment" refers to the data stream's control law being variable and the spectral content covering a wide range of wavelengths.)

The resulting approach uses a network of simple building-block equations (basis functions) to predict the non-event data and thereby present subtle sub-streams to a detection model …