Digital Commons Network^™

Raising Heart Rate With Dance Pad Based Computer Games, Martin Masek, Philip Hingston, Matthew Carrigy, Liam Collins, Kazunori Nosaka

Research outputs pre 2011

No abstract provided.

Adiabatically Induced Coherent Josephson Oscillations Of Ultracold Atoms In An Asymmetric Two-Dimensional Magnetic Lattice, Ahmed Abdelrahman, Peter Hannaford, Kamal Alameh

Research outputs pre 2011

We propose a new method to create an asymmetric two-dimensional magnetic lattice which exhibits magnetic band gap structure similar to semiconductor devices. The quantum device is assumed to host bound states of collective excitations formed in a magnetically trapped quantum degenerate gas of ultracold atoms such as a Bose-Einstein condensate (BEC) or a degenerate Fermi gas. A theoretical framework is established to describe possible realization of the exciton-Mott to discharging Josephson states oscillations in which the adiabatically controlled oscillations induce ac and dc Josephson atomic currents where this effect can be used to transfer n Josephson qubits across the asymmetric …

Multipartite Entanglement In A Discrete Magnetic Bands Magnetic Lattice, Ahmed Abdelrahman, Peter Hannaford, Mikhail Vasiliev, Kamal Alameh

Research outputs pre 2011

An asymmetric multi-quantum state magnetic lattice is proposed to host entangled system formed by using Bose Einstein Condensate. Discrete magnetic bands magnetic lattice is devised to locate a controllable long-range entanglement of a many qubits well separated in space. Confinement of the system may improve the condition for long-range entanglement.

The Implementation Of The Framework Of 21st Century Schools: A Comparison Of Two Rural, West Virginia High Schools., Cynthia Phillips Kolsun

Graduate Theses, Dissertations, and Problem Reports (ETD)

While prior research exists that high schools need to make changes to meet the needs of the students of the 21st Century, no research exists from the perspective of the teacher who must implement the changes. This qualitative study provides a comparison of two rural model 21st Century high schools in West Virginia, both members of the High Schools That Work network, and factors that impacted their initial benchmarking of 21st Century through a cross case analysis. The purpose of this study was to add to the body of knowledge concerning the factors that affecting the West Virginia framework of …

Annual Report 2008, Dexia

Documents

No abstract provided.

Identification And Characterization Of Novel Astroviruses, Stacy Finkbeiner

All Theses and Dissertations (ETDs)

Approximately 1.8 million children die from diarrhea annually, and millions more suffer multiple episodes of nonfatal diarrhea. Despite the availability of improved molecular diagnostics to detect the known viral agents, the etiology of a large proportion of diarrheal cases is unknown. In fact, it is estimated that no causative agent can be identified in up to 40% of sporadic cases or in gastroenteritis outbreaks. Detection of novel or unexpected viruses is the first step in identifying agents that could potentially close the diagnostic gap and pave the way for the development of more comprehensive preventative measures and better treatments. This …

North Dakota Climate Bulletin: Vol. 3, No. 4 (Fall 2009), Adnan Akyuz

North Dakota Quarterly Climate Bulletin

No abstract provided.

Multi-Proxy Palaeoclimate Reconstruction Of The Permian-Triassic Mass Extinction Event, Timothy Kearsey

School of Geography, Earth and Environmental Sciences Theses

The Permian/Triassic (P/Tr) boundary is widely assumed to have been a time of extreme environmental upheaval and change. In the terrestrial realm, a negative anomaly in 813C isotope values has been reported from organic carbon in Antarctica, Australia, India and Madagascar, and from marine carbonate in the Karoo Basin. However, these sections are all from southern palaeolatitudes. Analysis from the Permian-Triassic terrestrial sedimentary record of the South Urals, in Russia, comprising of many Aridisol and Vertisol horizons has revealed that, like the Southern Hemisphere, there is a dramatic change in paleosol morphology across the P/Tr boundary linked to a shift …

Measurement And Modelling Of Structure And Pore Level Processes In Filters And Wicks, John Charles Price

School of Geography, Earth and Environmental Sciences Theses

Characterisation of new filtration and wicking materials through a 'wet-bench" testing process is a requirement for many filtration companies before new products can be released to market. A reduction in this testing commitment through the application of successful computational based models, requiring minimal empirical input, would undoubtedly result in huge financial savings and reductions in testing lead times. Such models could offer total media characterisation and could also aid further insights into many filtration and wicking processes which before would have required an expensive combination of different testing procedures. In this research, a depth filtration model has been developed, based …

Backscatter And Attenuation Characterization Of Ventricular Myocardium, Allyson Gibson

All Theses and Dissertations (ETDs)

This Dissertation presents quantitative ultrasonic measurements of the myocardium in fetal hearts and adult human hearts with the goal of studying the physics of sound waves incident upon anisotropic and inhomogeneous materials. Ultrasound has been used as a clinical tool to assess heart structure and function for several decades. The clinical usefulness of this noninvasive approach has grown with our understanding of the physical mechanisms underlying the interaction of ultrasonic waves with the myocardium. In this Dissertation, integrated backscatter and attenuation analyses were performed on midgestational fetal hearts to assess potential differences in the left and right ventricular myocardium. The …

Interval Estimation Of Excess Risk Related Effective Doses In Tobit Models, Jia Wang

All Theses and Dissertations (ETDs)

No abstract provided.

A Quest For Meaning In Spontaneous Brain Activity - From Fmri To Electrophysiology To Complexity Science, Biyu He

All Theses and Dissertations (ETDs)

The brain is not a silent, complex input/output system waiting to be driven by external stimuli; instead, it is a closed, self-referential system operating on its own with sensory information modulating rather than determining its activity. Ongoing spontaneous brain activity costs the majority of the brain's energy budget, maintains the brain's functional architecture, and makes predictions about the environment and the future. I have completed three separate studies on the functional significance and the organization of spontaneous brain activity. The first study showed that strokes disrupt large-scale network coherence in the spontaneous functional magnetic resonance imaging: fMRI) signals, and that …

A Model Of Responses To Race-Based And Gender-Based Stereotype Threat In Computer Science, Lara Tedrow

Psychology Theses & Dissertations

The perception of stereotype threat among computer science students was examined at two universities. A model of stereotype threat was developed and tested among students enrolled in three undergraduate computer science courses at two universities. The goal of this model was to provide an understanding of the underlying mechanisms through which stereotype threat works.

The study tested relationships among the following variables: race-based stereotype threat, gender-based stereotype threat, goal orientation, CS self-efficacy, active coping, behavioral disengagement, effort, and performance. Structural equation modeling was used to test the measurement model and a series of nested structural models. Findings supported the proposed …

Biogenic Tracers Through The Holocene On The Alaskan Shelf, Carie A. Curry

OES Theses and Dissertations

Dramatic environmental changes in the Arctic Ocean have been observed for the last two decades including changing the amount of sea ice thickness and extent, and increased river discharge. In order to put these and other current day observations into historical context and perhaps reveal mechanisms controlling them, a suite of paleo-proxies were used to analyze two high resolution cores collected on the 2005 HOTRAX expedition. The goals of this research were: (1) develop an analytical method for determining biogenic calcite, (2) identify the major sources of biogenic matter into the system over the Holocene, and (3) assemble the history …

Comparative Study Of Forward And Diffusely Scattered Light In A Coherently Prepared Ultracold Rubidium Gas, Rocio Gisel Olave Gonzalez

Physics Theses & Dissertations

A comparison between forward and diffusely scattered light propagating in a coherently prepared ultracold ⁸⁷Rb atomic vapor is presented. This research is part of the ongoing effort to characterize the processes, such as diffusion, that contribute to coherence loss in atomic media under conditions of electromagnetically induced transparency, for applications in realistic systems. Toward this end, a magneto optical trap (MOT) of ⁸⁷Rb has been built, and the atomic vapor sample characterized in terms of atomic density, shape and size, temperature, and optical depth. Next, two co-propagating beams were sent through the sample, to establish an electromagnetically induced …

Transformation Paradox: A Framework For The Analysis Of Politics In Enterprise Transformations, Cindy S. Miller

Engineering Management & Systems Engineering Theses & Dissertations

The purpose of this research is to develop a theoretical framework for the analysis of politics in enterprise transformations using a dialectical analysis approach (Hegel, 1989; Heraclitus, 1979; Pinkard, 1988; Skinner, 1978a, 1978b) and conduct an evaluation of the framework validity. The framework is constructed using a dialectical analysis of concepts stemming from the work of Alford and Friedland (1992) and considers four theoretical perspectives: autocratic, bureaucratic, pluralistic, and cognitive. The framework is then validated by means of qualitative metrics and adherence to critical ideology.

This research addresses the problem that there is no holistic theoretical framework for the analysis …

Que Ondee Sola - January-February 2009, Xavier Luis Burgos

Que Ondee Sola

Student publication founded in 1972, articles include: Dominga Cruz Nationalist Leader, Rafael Hernandez Musician, Cortijo's Revenge: Race & Politics in Puerto Rico, Jose 'Chegui' Torres Boxing Champion, Jose Campeche Painter, Bomba: The History & Rhythyms of the Music, Loiza Aldea: The African Capital of Puerto Rico, History of the Maroon Societies, Luis Pales Matos Poet, NEIU Student Profile

A Protocol For Occupational Therapy Involvement In The Response To Intervention Model, Nicole Bolinger

Occupational Therapy Capstones

In order to provide effective occupational therapy services to children within the school-based practice setting, it is important to be knowledgeable regarding the current theories and educational models which drive the educational system. Also, it is imperative that school-based occupational therapy practitioners understand the educational models and how they may impact the way occupational therapists deliver services. Chandler (2007) states, "an initiative is gathering momentum that has the potential to significantly change the way occupational therapists practice in the public school" (p. 7). Occupational therapy may have an opportunity to expand their services through a model called Response to Intervention. …

History At The University Of North Dakota: 1885-1970, William Caraher

UND Departmental Histories

This departmental history was written on the occasion of the UND Quasquicentennial in 2008.

Decision Aids For Addressing The Validity-Adverse Impact Trade-Off, Paul R. Sackett, Wilfried De Corte, Filip Lievens

Research Collection Lee Kong Chian School Of Business

Typically, adverse impact (AI) is an after-the-fact analysis: Once predictor scores for a pool of applicants are available, AI is evaluated. Sometimes the analysis is made in real time, as predictor scores are obtained on a set of applicants, and AI calculations are done on a “what if” basis as input to decisions about features such as where to set a cutoff score. The focus of this chapter, however, is on attempts to estimate in advance the likely impact of a given selection system. Here, estimates are made based on available information about the features such as the expected magnitude …

Chaos And Uncertainty, M. Thulasidas

Research Collection School Of Computing and Information Systems

The end of 2008 in the finance industry can be summarized in two words – chaos and uncertainty. The subprime crisis, where everybody lost; the dizzying commodity price movements; the pink slip syndrome; the spectacular bank busts; and the gargantuan bail-outs all vouch for it.

(2009) Caring For The “Self As One Among Others”, Laurance J. Splitter

Collected Papers of Laurance J. Splitter

n this paper, I explore some underpinnings of the community of inquiry (CoI), viewed as the primary mode of classroom organization in Philosophy for Children but also as a pedagogic, personal and inter-personal framework for teaching and learning in any subject area. I will argue that the CoI provides a model of both personal and intellectual development which exemplifies how classroom teaching and learning may be seen both as forms of care and of self-care.

Will Directed Evolution Destroy Humanity, And If So, What Can We Do About It?, Maxwell J. Mehlman

Faculty Publications

In contemplating the technologies emerging from the Human Genome Project, nothing scares people more than the prospect that we will attempt to use genetic engineering to control the human evolutionary process.

Ltc Newsletter, University Of Dayton. Ryan C. Harris Learning Teaching Center

LTC Newsletter

Spring 2009

Biology In Mathematics At The University Of Richmond, Lester Caudill

Department of Math & Statistics Faculty Publications

In an effort to meet the needs of science students for modeling skills, three new courses have been created at the University of Richmond: Scientific Calculus I and II, and Mathematical Models in Biology and Medicine. The courses are described, and lessons learned and future directions are discussed.

Effects Of Quantum Mechanics On The Deflagration Threshold In The Molecular Magnet Mn12 Acetate, F Macià, J M. Hernandez, J Tejada, S Datta, S Hill, Christos Lampropoulos, G Christou

Chemistry Faculty Research and Scholarship

We report experimental studies of the stability of a Mn₁₂-Ac crystal against magnetic avalanches as a function of the magnitude and direction of the magnetic field, as well as a function of temperature. Strong evidence for quantum effects associated with this phenomenon is seen in the (H_z,H_x) metastability diagram. The data provide further support to the theory of magnetic deflagration.

Crystal Lattice Desolvation Effects On The Magnetic Quantum Tunneling Of Single-Molecule Magnets, G Redler, Christos Lampropoulos, S Datta, C Koo, T C. Stamatatos, N E. Chakov, G Christou, S Hill

Chemistry Faculty Research and Scholarship

High-frequency electron paramagnetic resonance (HFEPR) and alternating current (ac) susceptibility measurements are reported for a new high-symmetry Mn₁₂ complex, [Mn₁₂O₁₂(O₂CCH₃)₁₆(CH₃OH)₄]⋅CH₃OH. The results are compared to those of other high-symmetry spin S=10 Mn₁₂ single-molecule magnets (SMMs), including the original acetate, [Mn₁₂(O₂CCH₃)₁₆(H₂O)₄]⋅2CH₃CO₂H⋅4H₂O, and the [Mn₁₂O₁₂(O₂CCH₂Br)₁₆(H₂O)₄]⋅4CH₂Cl₂ and [Mn₁₂O …

Alignment Of Magnetic Anisotropy Axes In Crystals Of Mn12 Acetate And Mn12-Tbuac Molecular Nanomagnets: Angle-Dependent Ac Susceptibility Study, E Burzurí, Ch Carbonera, F Luis, D Ruiz-Molina, Christos Lampropoulos, G Christou

Chemistry Faculty Research and Scholarship

We report the results of angular-dependent ac susceptibility experiments performed on two derivatives of Mn₁₂ single-molecular magnets: the well-known Mn₁₂ acetate, which contains disordered acetic acid molecules in interstitial sites of the crystal structure and Mn₁₂-tBuAc, for which solvent molecules are very well ordered in the structure. Our results show (a) that the angular variation is very similar in the two compounds investigated and compatible with a maximum misalignment of the anisotropy axes of less than 3° and (b) that the tunneling rate is faster for the better ordered Mn₁₂-tBuAc compound. These experiments question …

Management And Social Indicators Of Soil Carbon Storage In A Residential Ecosystem, Midlothian, Va, Christopher M. Gough, Eliza A. Fritz

Virginia Journal of Science

Soil carbon storage- defined here as carbon mass per unit ground area- is an important ecosystem service, sequestering carbon that might otherwise exist in atmospheric CO₂ . Significant attention has focused on the effects that humans have on carbon cycling, but little is known about how human behaviors and attitudes relate to lawn carbon storage. The objectives of this study were to conduct household surveys in concert with soil carbon sampling in a 10-year-old exurban neighborhood near Richmond, Virginia to quantify differences in soil carbon storage between residential lawns and mixed pine-hardwood forest fragments, and to determine how lawn …

Decentralized Or Centralized Production : Impacts To The Environment, Industry, And The Economy, Abigail R. Clarke-Sather

Dissertations, Master's Theses and Master's Reports - Open

Since product take-back is mandated in Europe, and has effects for producers worldwide including the U.S., designing efficient forward and reverse supply chain networks is becoming essential for business viability. Centralizing production facilities may reduce costs but perhaps not environmental impacts. Decentralizing a supply chain may reduce transportation environmental impacts but increase capital costs. Facility location strategies of centralization or decentralization are tested for companies with supply chains that both take back and manufacture products.

Decentralized and centralized production systems have different effects on the environment, industry and the economy. Decentralized production systems cluster suppliers within the geographical market region …