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Resonance Two Photon Ionization Study Of Binary Clusters Of Styrene With Polar Molecules, Hatem Ahmed Mahmoud

Theses and Dissertations

One-color resonance two-photo ionization (R2PI) spectra of mixed clusters of styrene molecule (S) with polar molecules [water (W), methanol (M), ethanol (E), and trifuoroethanol (T)] were measured through the S1←S0 transition of the styrene molecule. The spectra reveal a rapid increase in complexity with the number of polar molecules in the cluster, associated with van der Waal modes and isomeric forms. The spectral shifts of the cluster origins from the S1-S0 transition of the bare styrene molecule reflect the nature of the intermolecular interactions within the binary clusters. The obtained R2PI spectra xv were compared with the spectra of the …

Sonogashira Coupling Routes To Ortho-Alkynl-And- Fused-Ring Sydnones, Andrew John Weisner

Browse all Theses and Dissertations

In the present work, suitably functionalized arylsydnones were used to synthesize a variety of ortho-alkynyl sydnones both as potential precursors to novel sydnoquinolines and to provide non-linear optical (NLO) species of interest to Wright-Patterson Air Force Base (WPAFB). The versatile intermediate, 3-(2-(trimethylsilylethynyl)phenyl)sydnone, was prepared in good yield by the coupling of 3-(2-iodophenyl)sydnone with trimethylsilyl acetylene under Sonogashira conditions. From this intermediate, several ortho-alkynyl sydnones were prepared via a one-pot desilylation with tetrabutylammonium fluoride and Sonogashira coupling with para-substituted aryl iodides. In addition, a three-reaction-in-one-pot procedure was developed to access some of these species directly from 3-(2- iodophenyl)-sydnone. Subsequent reaction of …

Identification Of Gypsy Moth Defoliation In Ohio Using Landsat Data, Angela Lorraine Hurley

Browse all Theses and Dissertations

The gypsy moth is one of the most devastating forest pests in North America. In late spring, gypsy moth larvae hatch from eggs laid the previous summer. During the next forty days, tens of thousands of these caterpillars eat up to one square foot of foliage each. The gypsy moth has established populations in several states, and dangerously fast-growing populations in several others. The state of Ohio is a critical area in the suppression of the gypsy moth because the front of gypsy moth advance passes through the state. Besides diminishing the aesthetic value of Ohio’s forests, gypsy moths also …

Feasibility Of Radiographic Absorptiometry Of The Mandible As An Osteoporosis Screening Method, Julie A. Skipper

Browse all Theses and Dissertations

The purpose of this work was to develop and evaluate single- and dual-energy radiographic absorptiometry (RA) for the measurement of mandibular bone mineral density (BMD), using standard dental equipment, that would allow for inexpensive and widespread osteoporosis screening. Accurately measured x-ray tube spectra are important for validating the simulations used in the design of the method. A constrained least-squares deconvolution technique for reducing the detector-induced blurring of the energy spectrum was developed. Application of this analytic correction to spectra acquired with a NaI-photomultiplier detector improved the measured data by 20-60%. Implementation of the screening method is accomplished by simultaneously acquiring …

Characterization Of A Viscoplastic Constitutive Model And Its Application For The Finite Element Analyses Of A Stirling Space Power Converter Heater Head, Ali Abdul-Aziz, David Krause, M. Tong

United States National Aeronautics and Space Administration: Publications

NASA has identified the Stirling power converter as a prime candidate for the next generation power system for space applications requiring 60,000 hours of operation. To meet this long-term goal, several critical components of the power converter were analyzed using advanced structural assessment methods. Perhaps the most critical component, because of its geometric complexity and operating environment, was the power converter’s heater head. Low-cycle fatigue and creep experiments on a nickelbase superalloy, Udimet 720 LI (lowinclusions) and viscoplastic analyses for the Stirling starfish heater head were conducted. All testing was performed at temperatures of 625 to 820±C in air. This …

A Deterministic Interfacial Cyclic Oxidation Spalling Model, James L. Smialek

United States National Aeronautics and Space Administration: Publications

A series summation has been developed to model the iterative scale growth and spalling process of cyclic oxidation.

Parabolic scale growth has been assumed. Interfacial spallation of a constant area fraction was stipulated to occur only at the thickest portions. Inputs are the parabolic growth rate constant, spall area fraction, oxide stoichiometry, and cycle duration. Outputs include the net weight change, amount of oxygen and metal consumed, and amount of oxide spalled. Classic weight change curves are produced with an initial maximum and final linear weight loss rate. This simplicity allowed for representation by explicit algebraic functions for all outputs …

Robustly Transitive Sets And Heterodimensional Cycles, Christian Bonatti, Lorenzo J. Díaz, Enrique R. Pujals, Jorge Rocha

Publications and Research

It is known that all non-hyperbolic robustly transitive sets Λ_φ have a dominated splitting and, generically, contain periodic points of different indices. We show that, for a C¹-dense open subset of diffeomorphisms φ, the indices of periodic points in a robust transitive set Λ_φ form an interval in ℕ. We also prove that the homoclinic classes of two periodic points in Λ_φ are robustly equal. Finally, we describe what sort of homoclinic tangencies may appear in Λ_φ by studying its dominated splittings.

Allowance For Credit Losses; Exposure Draft (American Institute Of Certified Public Accountants), 2003, June 19, American Institute Of Certified Public Accountants. Accounting Standards Executive Committee

Exposure Drafts, Comment Letters, and Statements of Position

No abstract provided.

Aicpa Professional Standards: U.S. Auditing Standards As Of June 1, 2003, American Institute Of Certified Public Accountants

AICPA Professional Standards

No abstract provided.

Investigation Of Model Cell Membrane Disruption Via Fluorescence And Light Scattering Techniques, Imara Charles

Seton Hall University Dissertations and Theses (ETDs)

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The Impact Of Classroom Organization In Grade 4 On Student Achievement In Science, Edward Duncanson

Seton Hall University Dissertations and Theses (ETDs)

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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 …

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 …

Shock Wave Dispersion In Weakly Ionized Gas, Prasong Kessaratikoon

Physics Theses & Dissertations

Electrodeless microwave (MW) discharge in two straight, circular cylindrical resonant cavities in TE_1,1,1 and TM_0,1,2 modes were introduced to perform additional experimental studies on shock wave modification in non-equilibrium weakly ionized gases and to clarify the physical mechanisms of the shock wave modification process. The discharge was generated in 99.99% Ar at a gas pressure between 20 and 100 Torr and at a discharge power density less than 10.0 Watts/cm³. Power density used for operating the discharge was rather low in the present work, which was determined by evaluating the power loss inside the resonant cavity. …

Privatize Or Self-Operate: Decision-Making In Campus Services Management, Jeffrey Shelton Pittman

Theses and Dissertations in Urban Services - Urban Education

In the past colleges operated as communities in which teaching and almost every other aspect of campus life were managed by a campus entity. This is particularly true in the area of campus support services. In recent years, there has been a significant shift in the way campus services are provided. Increasingly, college and university administrators evaluate the benefits and potential problems of privatizing or outsourcing various service units. Currently, such services as bookstores, food preparation/service operations, and physical plant departments have been the primary services chosen for privatization.

This study examines the decision-making process governing the choice between privatization …

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 …

Connecting Community And School: A Systems Approach, Nichole Kea Zumbach Johnson

Dissertations and Theses @ UNI

Making community and school connections is vital as the nation experiences an economic downturn. Financial consideration and collaborative projects are extremely important when beginning a community/school project. However, the common aspect running through any community/school project is communication. The level of communication that must exist for the system to be successful is incredible. This is not an analysis of one theory; instead it is a testament to how communication studies must be utilized, in every aspect, to make the system function as efficiently as possible. Systems theorists present a fitting outline to determine challenges that exist when trying to create …

Public Trust Doctrine And Public Access In New Jersey, Urban Harbors Institute, University Of Massachusetts Boston

Urban Harbors Institute Publications

A discussion paper prepared as part of a series of focus groups on the topic of the Public Trust Doctrine and Public Access in New Jersey.

Public access is specifically identified as one of the key priorities of the Coastal Zone Management Act (CZMA) of 1972. More importantly, the Act enables states to develop their own coastal zone management programs and to receive federal funding with which to implement them. There are a number of criteria that such plans must include before they can receive federal approval.

Learning From Conflict: Reflections On Teaching About Race And Gender, Susan Sturm, Lani Guinier

Faculty Scholarship

In 1992 had been teaching for four years at the University of Pennsylvania Law School. I taught voting rights and criminal procedure, subjects related to what I had done as a litigator. Preparing for class meant reading many of the same cases I had read preparing for trial. Some were even cases I had tried. Teaching offered me a fresh chance to read those cases with new interest. I could see the subtle linkages between cases that I had not previously noticed. From the distance of the academy, I observed the evolution of the doctrine without feeling overcome by the …

Student Perceptions Of Ethics And Professionalism In Computer Science: Does Age, Gender, Or Experience Matter?, James Stuart Bohy

Dissertations and Theses @ UNI

This work explores several factors that impact ethics education in undergraduate computer science, including: the overall understanding of ethics material, any differences between male and female subjects, any differences between traditional age and non-traditional age subjects, and any differences in experience level. Instruments (attitudinal surveys and reflective scenarios) were distributed to four institutions in the Midwest; 74 out of 170 were returned.

Female subjects demonstrated a markedly better ability to distinguish between ethical and unethical behavior in the scenarios (especially in areas where the distinctions were less obvious) and produced higher quality written justifications. There were only 4 attitudinal survey …

Teacher Perceptions Of Iowa Workshop Model Aspects Fostering Use Of Project Wet, Marcene Seavey

Dissertations and Theses @ UNI

State partners of national environmental education (EE) programs contribute to professional development in EE through their program delivery. This study describes teacher perceptions of individual elements of EE workshops provided by one such program, Iowa Project WET. The study found that educators associate three types of workshop activities with successful classroom integration of Project WET activities: ( a) Experiencing activities first-hand, (b) interacting with other educators, and (c) learning about the Project WET Activity and Curriculum Guide. Almost 90% of survey respondents integrate some of the activities they experience during the workshop into their classrooms. Some of these teachers also …

Economics, Biology, And Culture: Hodgson On History, Alexander J. Field

Economics

This book addresses what the author claims, with considerable justification, to be the foremost challenge confronting the social and behavioral sciences today: the problem of historical specificity. Hodgson poses the question by asking whether we need different theories to understand social and economic behavior in different societies at different stages of their development. He answers the question in the affirmative, and criticizes the economics profession for suggesting that there is one universal model or theory equally suited to all economies and societies at all times. He faults the profession further for no longer worrying much or conducting serious debate about …

Explaining Speculative Expansions;, Wei Xiao

Department of Economics and Finance Working Papers, 1991-2006

In this paper we use a modified neoclassical business cycle model to test two competing explanations of the expansion of the 1990s. The model can have indeterminate, multiple equilibria that give rise to expectation-driven business cycles. We fit into the model series of estimated speculative and productivity shocks and compare its predictions with empirical data. Our results suggest that the speculation hypothesis has more explanatory power than the productivity hypothesis in terms of matching the data. Speculative behavior of investors, therefore, may have contributed to the investment boom, the prolonged expansion, and the subsequent recession of the period 1991-2001.

Sm 601, 602, 603 Supervised Ministry Handbook, Asbury Theological Seminary

Syllabi

Lay Leadership for Ministry Training, Field Supervisors Handbook: Local Church, Field Supervisors Handbook: Institutional

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 …

The Fcat Is Out Of The Bag: Prominent Concerns Regarding Florida's Comprehensive Assessment Test, David Lewis

University of Florida Journal of Law & Public Policy

No abstract provided.

The Impact Of Medicaid Estate Recovery On Nontraditional Families, Diane Lourdes Dick

University of Florida Journal of Law & Public Policy

No abstract provided.

Decoherence In Two Coupled Qubits, Kristian Rabenstein, Dmitri V. Averin

Turkish Journal of Physics

We have developed quantitative description of quantum coherent oscillations in the system of two coupled qubits in the presence of weak decoherence that in general can be correlated between the two qubits. It is shown that in the experimentally realized scheme of excitation of the oscillations, their waveform is not very sensitive to the magnitude of decoherence correlations. Modification of this scheme into potentially useful probe of the degree of decoherence correlations at the two qubits is suggested.

Issues In The Control Of Halfspace Systems, Ramprasad Potluri

University of Kentucky Doctoral Dissertations

By the name HALFSPACE SYSTEMS, this dissertation refers to systems whose dynamics are modeled by linear constraints of the form Exk+1 <= Fxk + Buk (where E, F 2 andlt;mn, B 2 andlt;mp). This dissertation explores the concepts of BOUNDEDNESS, STABILITY, IRREDUNDANCY, and MAINTAINABILITY (which is the same as REACHABILITY OF A TARGET TUBE) that are related to the control of halfspace systems. Given that a halfspace system is bounded, and that a given static target tube is reachable for this system, this dissertation presents algorithms to MAINTAIN the system in this target tube. A DIFFERENCE INCLUSION has the form xk+1 = Axk + Buuk, where xk, xk+1 2 andlt;n, uk 2 andlt;p, A 2 andlt;nn, Bu 2 andlt;np, Ai 2 andlt;nn, Bj 2 andlt;np, and A and Bu belong to the convex hulls of (A1,A2, . . . ,Aq) and (B1, B2, . . . , Br) respectively. This dissertation investigates the possibility that halfspace systems have equivalent difference inclusion representation for the case of uk = 0. An affirmitive result in this direction may make it possible to apply to halfspace systems the control theory that exists for difference inclusions.

Digital Divide: Myth, Reality, And Responsibility, Nick Allard

Faculty Scholarship

No abstract provided.