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Electric Field Tunable Magnetic Properties Of Lead-Free Na0.5bi0.5tio3/Cofe2o4 Multiferroic Composites, S Narendra Babu, Seong Gi Min, Leszek Malkinski

Physics Faculty Publications

Lead-free multiferroic particulate composites of Na_0.5Bi_0.5TiO₃ (NBT) and CoFe₂O₄ (CFO) have been synthesized by solid-state sintering method. A systematic study of structural, magnetic and magnetoelectric (ME) properties is undertaken. Structural and morphology studies carried out by x-ray diffraction and field emission scanning electron microscopy indicate formation of single phase for parent phases and presence of both phases in the composites. Magnetic properties are investigated using vibrating sample magnetometer and ferromagnetic resonance (FMR) measurements at room temperature. Strong ME coupling is demonstrated in NBT-CFO 70-30 mol% composite by an electrostatically tunable FMR field …

Calorimetric Evidence Of Strong-Coupling Multiband Superconductivity In Fe(Te0.57se0.43) Single Crystal, J. Hu, T. J. Liu, B. Qian, A. Rotaru, L. Spinu, Z. Q. Mao

Physics Faculty Publications

We have investigated the specific heat of optimally doped iron chalcogenide superconductor Fe(Te_0.57Se_0.43) with a high-quality single crystal sample. The electronic specific heat C_e of this sample has been successfully separated from the phonon contribution using the specific heat of a nonsuperconducting sample (Fe_0.90Cu_0.10)(Te_0.57Se_0.43) as a reference. The normal-state Sommerfeld coefficient γ_n of the superconducting sample is found to be ~26.6 mJ/mol K², indicating intermediate electronic correlation. The temperature dependence of C_e in the superconducting state can be best fitted using a double-gap …

Bgsu Graduate College 2011-2012 Catalog, Bowling Green State University

Course Catalogs

Bowling Green State University graduate catalog for 2011-2012.

Mckillop Library Newsbrief Jan 2011

McKillop Library Newsbrief

No abstract provided.

Acer 2010-2011 Annual Report, Australian Council For Educational Research (Acer)

ACER Annual Reports

No abstract provided.

Investigating The Influence Of Organic Acids On Uraninite Solubility And Uranyl Sorption Onto Kaolinite, Michelle L. Barger

Dissertations

Within anoxic near surface aqueous settings where U0_2(S) may be released an opportunity to encounter and complex with organic acids may occur. Reactions between U0_2(S) and ligands may promote the solubility and mobility of uranium. Organic ligands investigated in the dissolution work include citric acid, NTA and EDTA. Exposure to the ligands had little effect on U0_2(S) solubility. The log activity of U0_2(S) hydrolysis under reduced conditions was -6.56. Under all measured conditions of ligand concentration, the data consistently show an increase in uranium concentration to a median log U activity of -4.89. The observed solubility …

Deconstructing Corporate Governance: Director Primacy Without Principle?, René Reich-Graefe

Faculty Scholarship

If profit-maximizing is not enforced by corporate law, why does it nonetheless happen as a matter of almost overwhelming routine in today’s corporate reality? If indeed, director primacy is absolute and our theoretical models are all reliant on protolegal variables to explain general investor confidence ex-ante-investment despite the lack of director accountability ex-post-investment, then how can director primacy be understood and explained as a principled and, thus, just cor-porate governance structure in the first place? Or is director primacy not only absolute, but also without principle?

This Article provides a roadmap for purposes of answering this inquiry. Part II …

Obesity And Overweight Prevalence Among A Mississippi Low-Income Preschool Population: A Five-Year Comparison, Bonnie Harbaugh, Jerome R. Kolbo, Elaine F. Molaison, Geoffrey M. Hudson, Lei Zhang, Danyell Wells

Faculty Publications

Purpose. This study determined 2010 rates of overweight/obesity in a representative sample of low-income preschoolers in Mississippi, USA and compared rates between 2005 (� = 1 2 5 0) and 2010 (� = 1 7 6 5). Significance. Obesity is a significant global health issue because of its well-established negative health consequences. Child obesity is a concern due to risk of early-onset obesity-related illnesses and the longevity of lifetime exposure to those illnesses. Methods. Identical measures were used in 2005 and 2010 with complex-stratified sampling designs. Results. Chi-square tests revealed that overall obesity/overweight rates between 2005 (20.6%/17.9%) and 2010 (20.8%/17.0%) …

Coastal Watershed Connections; Student Impact, Stewardship, And Reflections, Sherry S. Herron, Shelia A. Brown

Faculty Publications

The project provided students and teachers in six coastal and noncoastal Title 1 secondary schools in Mississippi with experiential learning activities to emphasize connections between their local watershed an coastal habitats of the Gulf of Mexico using GLOBE (Global Learning and Observations to Benefit the Environment) protocols, OBIS (Outdoor Biology Instruction Strategies) Science and service-learning projects.

Confronting The Certainty Imperative In Corporate Finance Jurisprudence, Diane Lourdes Dick

Utah Law Review

As it has evolved across decades of case law and legislative enactments, the Certainty Imperative has profoundly altered judicial decision-making in finance and lending by encouraging strict interpretive norms and rejecting more expansive contextual analyses. Over time, the Imperative’s methodological constraints have become a paralyzing force upon the judiciary, preventing it from engaging in legal reform. In essence, the law of corporate finance places the highest value upon the status quo. The methodological constraints imposed by the Imperative must be overcome. As modern corporate financing arrangements grow more complex, moral hazards arise when contractual language vests substantive rights and remedies …

Surveying The Online Classroom : Student Reactions To E-Learning, Jordan Dierks

Graduate Research Papers

The utilization of commercial, open source, and institution designed learning management systems are increasing in higher education. Universities are competing with each other to find qualified applicants or increase enrollment. Many higher education institutions are evaluating their return on investment for educational technologies, white public institutions are facing the reality of shifting funding sources from state support to self-sufficiency. The purpose of this study is to determine if the use of a learning management system (LMS) in an online classroom supporting either a full-web or blended course affects student satisfaction with the learning experience. Additional areas examined include whether students …

Student Motivation And No Child Left Behind, Tiffany Kleckner

Graduate Research Papers

The No Child Left Behind Act was developed in 2002 by the administration of George W. Bush. The purpose of this piece of legislation was to increase student achievement in America. Regulations and requirements have been put in place by the administration such as standardized testing. This paper discusses the history of NCLB, the current issues with the legislation, and how student motivation and achievement has been effected due to the NCLB law.

Curricular Integration In The Elementary Classroom, Jill Leibold

Graduate Research Papers

The No Child Left Behind Act and how it narrows the elementary curriculum is an important educational issue. Integration is a valuable teaching practice that is becoming more wide spread in today's classrooms because of the pressures placed on teachers by NCLB. Integration is used to relieve some of the pressures of NCLB by helping teachers create more time to teach all subject areas. Integration allows teachers to connect learning standards across the curriculum and make lessons more meaningful for the students. This paper describes what integration is and why teachers need to implement integration into their daily instruction. In …

Design And Ground Plane Optimization Of A Cpw-Fed Ultra-Wideband Antenna, Mohammed Al-Husseini, Ali Ramadan, Youssef Tawk, Ali El-Hajj, Karim Y. Kabalan

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, an ultra-wideband antenna based on an egg-shaped conductor and a co-planar waveguide (CPW) feed is presented. The ground plane incorporates an egg-shaped slot with parametrized center and dimensions. By resizing the slot and moving its center, a slotted or a partial ground can be obtained. Based on this configuration, a parametric study that aims at achieving the best ultra-wideband (UWB) response of the antenna is done. The study shows that an excellent UWB response is achieved for a certain ground slot size, beyond which the response starts to degrade. However, as the slot size tends to infinity, …

Application Of A Hybrid Evolutionary Technique For Efficiency Determination Of A Submersible Induction Motor, Mümtaz Mutluer, Osman Bi̇lgi̇n

Turkish Journal of Electrical Engineering and Computer Sciences

Electric motors are the largest consumers of electricity in plants and induction motors constitute nearly two-thirds of them. The replacement of in-service induction motors with more efficient ones is a very important strategy for energy savings and consequently nearly 30 different methods have been used to determine the efficiency of induction motors in the last 2 decades. This paper aims to develop the efficiency determination of a 20 Hp submersible induction motor. Due to getting perfect efficiency of the submersible induction motor, a robust hybrid evolutionary optimization technique, which consists of a genetic algorithm and simulated annealing, is used. The …

An Algorithm To Minimize Within-Class Scatter And To Reduce Common Matrix Dimension For Image Recognition, Ümi̇t Çi̇ğdem Turhal, Alpaslan Duysak

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, a new algorithm using 2DPCA and Gram-Schmidt Orthogonalization Procedure for recognition of face images is proposed. The algorithm consists of two parts. In the first part, a common feature matrix is obtained; and in the second part, the dimension of the common feature matrix is reduced. Resulting common feature matrix with reduced dimension is used for face recognition. Column and row covariance matrices are obtained by applying 2DPCA on the column and row vectors of images, respectively. The algorithm then applies eigenvalue-eigenvector decomposition to each of these two covariance matrices. Total scatter maximization is achieved taking the …

Design And Development Of Workstation For Microparts Manipulation And Assembly, Emrah Deni̇z Kunt, Ahmet Teoman Naskali̇, İslam Shoukry Mohammed Khalil, Asif Sabanovic, Ebubeki̇r Yüksel

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, microassembly system design issues are discussed with requirements, constraints and necessities for the development of an assembly platform, and these issues are shown over a versatile and reconfigurable microassembly workstation which is designed and realized as a research tool for investigation of the problems in microassembly and micromanipulation tasks. First prototype of a workstation and the development of a second prototype with enhancements on mechanical and control structure of the system are presented with details on the configuration of the systems. In addition, several experiments using a workstation are presented both on the first and the second …

Different Degrees Of Partial Melting Of The Enriched Mantle Source For Plio−Quaternary Basic Volcanism, Toprakkale (Osmaniye) Region, Southern Turkey, Utku Bağci, Musa Alpaslan, Robert Frei, Mehmet Ali̇ Kurt, Abi̇di̇n Temel

Turkish Journal of Earth Sciences

The Toprakkale (Osmaniye) region, located in the Yumurtalık fault zone in southern Turkey, contains Quaternary volcanic rocks, shown by their mineralogical and petrographical features to be alkali basaltic and basanitic. These alkaline rocks are enriched in the large ion lithophile elements (LILE) Ba, Th and U, and show light rare earth element (LREE) enrichment relative to heavy rare earth element (HREE) on primitive mantle trace and rare earth element patterns that indicate different partial melting of the same source. The isotopic 87Sr/86Sr ratio is relatively low (0.703534-0.703575 for the alkali basalts and 0.703120-0.703130 for the basanites) and the 143Nd/144Nd ratio …

A New Species Of Angariid Gastropod From The Early Thanetian Of The Haymana-Polatlı Basin, Turkey, İzzet Hoşgör, Yavuz Okan

Turkish Journal of Earth Sciences

A new trochoidean species, Angaria calvii n. sp., from the early Thanetian of the Kırkkavak Formation (Haymana-Polatlı Basin, Palaeocene) in central Anatolia, is described and placed in the family Turbinidae. Previously, the oldest Cenozoic Angaria was recorded from the Early Palaeocene (Danian) in France (Paris Basin). In this paper, we report the second discovery of the oldest angariid specimens from the Thanetian sediments of the Tethys realm, a stratigraphic position which is supported by the foraminiferal-red alga assemblages at this locality.

New Data On The Dasycladales From The Lower Eocene Of Seyitgazi Region, Eskişehir, Central Turkey, Rajka Radoicic, Nazi̇re Erdem

Turkish Journal of Earth Sciences

An association of Dasycladalean algae is identified from the Lower Eocene (Ilerdian-Cuisian) of the Seyitgazi area, Western Anatolia. The association consists mostly of the genus Belzungia Morellet and Anatolia n. gen. This is the first discovery of such a rich and diversified dasycladalean flora with Belzungia in the Eocene of Central Tethys. The genus Belzungia is represented by four species: Belzungia terquemi Morellet, B. silvestrii (Pfender), B. bella (Ju Ying) Radoicic and B. pfenderae n. sp. Belzungia articles consist of whorls characterized by an assemblage of laterals, in the transversal section of which, the primary laterals are distally enlarged (sub-triangular …

Sphalerite Associated With Pyrrhotite-Chalcopyrite Ore Occurring In The Kotana Fe-Skarn Deposit (Giresun, Ne Turkey): Exsolution Or Replacement, Emi̇n Çi̇ftçi̇

Turkish Journal of Earth Sciences

The Kotana prospect is located about 30 km south of Giresun (NE Turkey). The ore mineralization is a Fe-skarn occurring within the low-grade pre-Lower Jurassic Pınarlar metamorphics, consisting of marble-phyllite intruded by the Upper Cretaceous-Eocene Aksu biotite monzogranite. The principal primary ore minerals include pyrrhotite and magnetite along with minor pyrite (I) and chalcopyrite, accompanied by trace sphalerite. Sphalerite is closely associated with chalcopyrite and to a lesser extent with hexagonal pyrrhotite. Secondary ore minerals include pyrite (II), marcasite, martite, hematite, goethite, lepidocrocite, and intermediate Fe-oxides-hydroxides. Gangue minerals are mainly calcite and quartz. Oxidation of the primary sulphides resulted in …

Late-Medieval Plagioclase-Titanaugite-Bearing Iron Slags Of The Yapraklı Area (Çankırı), Turkey, W. E. Sharp, Steven K. Mittwede

Turkish Journal of Earth Sciences

A mineralogical, mineral-geochemical and ^1^4C geochronological study of slags, previously identified as copper slags, in the Yapraklı area (Çankırı Province) of central Anatolia, has demonstrated that these are late-medieval iron slags consisting mainly of fayalite, glass, plagioclase, titanaugite, ulvöspinel and metallic iron. Because of the high lime content, relative to other medieval and Roman slags, these slags are quite anomalous in their lack of both modal and normative wüstite. Further study of these sites could shed light on the mining history and smelting methods of central Anatolia during a relatively obscure period of major socio-ethnic transition.

Geophysical Variations During The Total Solar Eclipse In 2006 In Turkey, Abdullah Ateş, Aydin Büyüksaraç, Özcan Bektaş

Turkish Journal of Earth Sciences

It has been observed that some geophysical parameters could be changed during a solar eclipse. We have therefore measured gravity and magnetic fields during solar eclipses. We also measured the gravity field during the previous eclipse on the 11^t^h of August, 1999. Gravity measurements on the 29^t^h of March, 2006 are compared with previous gravity measurements at the same location during the eclipse on the 11^t^h of August, 1999. Both showed the same behaviour during the eclipses. Gravity measurements showed fluctuations during both eclipses. A decrease in the intensity of the magnetic field was observed. Low-pass filtered magnetic data show …

Pre-Jurassic Basement Of The Greater Caucasus: Brief Overview, Mark L. Somin

Turkish Journal of Earth Sciences

The main units of the Greater Caucasus pre-Jurassic basement are represented by Svanetian and North-Caucasian domains brought together tectonically. The former includes continuous Devonian to Upper Triassic marine sequence devoid of any manifestation of Variscan orogenic activity. In contrast, within the limits of the North-Caucasian domain the Variscan events are expressed in classical form. This domain is very heterogeneous and contains both metamorphosed and unmetamorphosed formations. Till recently the former was considered by most authors to be mainly Proterozoic. New geochronological data indicate that the predominant part of these complexes is Palaeozoic in their protolith age. Lithology, P/T conditions of …

Upper Jurassic Reefs From The Russian Western Caucasus: Implications For The Eastern Black Sea, Li Guo, Stephen J. Vincent, Vladimir Lavrishchev

Turkish Journal of Earth Sciences

Exposures of Upper Jurassic reef outcrops in the Russian western Caucasus provide excellent field analogues for possible reef-complex reservoir targets imaged on seismic reflection data from the northern Shatskiy Ridge, eastern Black Sea. The reefs at outcrop can be generally grouped into coral-dominated, siliceous sponge-microbialite and microbialite types. Coral-dominated reefs occur as isolated patchy and massive forms, and can be subdivided into higher-diversity and low-diversity types. The former developed at shallow-water platform margins and in platform interiors, whilst the latter occurred in deeper-water mid-shelf settings. Siliceous sponge-microbialite and microbialite reefs occur as lenses and mounds that were restricted to deeper-water …

New Media Icc Profiles Construction And Concerns, Reem El Asaleh

Dissertations

With the advent of the modern digital technology, users can now capture an image and reproduce it between different media, such as display it on LCD monitor or tablet computer, print it on desktop printer or send it to a printing press. The challenge has been then to maintain the accuracy of image colors during this reproduction, which has led to the development of Color Management Systems. Using these systems, the color reproduction across-media will be accomplished using device ICC profiles that describe each device’s color characterization data in a standardized format based on International Color Consortium (ICC) specifications.

ICC …

Leach-Sm: A Protocol For Extending Wireless Sensor Network Lifetime By Management Of Spare Nodes, Bilal Abu Bakr

Dissertations

Operational lifetime of a wireless sensor network (WSN) depends on its energy resources. Significant improvement of WSN lifetime can be achieved by adding spare sensor nodes to WSN. Spares are ready to be switched on when any primary (a node that is not a spare) exhausts its energy. A spare replacing a primary becomes a primary itself.

The LEACH-SM protocol (Low-Energy Adaptive Clustering Hierarchy with Spare Management) proposed by us is a modification of the prominent LEACH protocol. LEACH extends WSN lifetime via rotation of cluster heads but allows for inefficiencies due to redundant sensing target coverage. There are two …

Experiences That Influence A Student's Choice On Majoring In Physics, Donya Rae Dobbin

Dissertations

Currently the production of college graduates with science and engineering degrees is insufficient to fill the increasing number of jobs requiring these skills. This study focuses on physics majors with an in-depth examination of student transitions from high school to college. Many different areas of influence could affect a student's decision to major in physics. The first phase of this study addresses all of the potential areas of influence identified from the literature. The goal was to identify common influences that might be used to increase students' interest in majoring in physics. Subjects (N=35) from the first phase were recruited …

Debugging Support For Message-Passing Based Concurrent Software, Mohamed Medhat Elwakil

Dissertations

Today, multi-core processors are used in all computing aspects, including embedded systems such as mobile devices. In order for software programs to benefit from the transition to multi-core processors, the programs need to be concurrent.

Recent research shows that programs developed using the message-passing model can scale better than programs developed using the shared-memory model. However, the message-passing model is not widely adopted, partly, because of the lack of debugging tools. Debugging message-passing programs is very intricate due to their inherent nondeterministic behavior; even with the same input, a program may behave differently when executed multiple times. Bugs in message-passing …

Relativistic R-Matrix Theory, Janina Grineviciute

Dissertations

We have developed a relativistic coupled{channel reaction theory in which binary break-up channels satisfy a relative Dirac equation. This theory is developed by extending the R-matrix formalism of Lane and Thomas to the relativistic case and implementing the Dirac oscillator basis. The motivation for this project is testing po- tentials for the dense matter calculations and generating relativistic wave functions for the nal states in the knockout reactions. As an example of the formalism we have calculated observables for the proton scattering on light-to-medium weight nuclei in the relativistic impulse approximation using the relativistic Love-Franey amplitudes of Horowitz. The R-matrix …