Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Other

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type

Articles 21751 - 21780 of 25731

Full-Text Articles in Entire DC Network

Manipulating And Hiding Terrorist Content On The Internet: Legal And Tradecraft Issues, Jack F. Williams Jan 2008

Manipulating And Hiding Terrorist Content On The Internet: Legal And Tradecraft Issues, Jack F. Williams

Faculty Publications By Year

No abstract provided.

Go to article

Perceptions Of Special Education And General Education Teachers On Co-Teaching Of Students With Disabilities In Outheast Georgia School Systems, Deborah Richardson Jan 2008

Perceptions Of Special Education And General Education Teachers On Co-Teaching Of Students With Disabilities In Outheast Georgia School Systems, Deborah Richardson

College of Graduate Studies: Theses & Dissertations

The researcher's purpose of this study was to understand perceptions of co-teaching by special education and general education teachers, and how those perceptions make the implementation of co-teaching for students with disabilities in the general education classroom successful. The study examined teacher perceptions on training for co-teaching, recommended practices for co-teaching, and supports needed for the co-teaching team. The researcher administered a Likert-scale survey, Perceptions of Co-Teaching Survey developed by Vance Austin (2001) to 45 special education and 98 general education teachers with co-teaching experience from three school districts in southeast Georgia. Teacher perceptions in three different areas were addressed: …

Go to article

Synthesis And Study Of Fluorinated Thiophenes, Bithiophenes And Trithiophenes: Models For The Polymeric Material, Nashaat Turkman Jan 2008

Synthesis And Study Of Fluorinated Thiophenes, Bithiophenes And Trithiophenes: Models For The Polymeric Material, Nashaat Turkman

Chemistry & Biochemistry Dissertations - Archive

3-Fluorothiophene is a small molecule and the known syntheses for this molecule are far from being straight forward and suffer from many drawbacks such as low yield, long synthetic procedures and the use of expensive or dangerous fluorinating agents. The synthesis of 3-fluorothiophene was accomplished in four steps and 49% overall yield by a very convenient method. 2,5-Dibromo-3-fluorothiophene was prepared in essentially one step synthesis involving a decarboxylation-bromination reaction. Both 3-fluorothiophene and 2,5-dibromo-3-fluorothiophene are potential monomers for a wide variety of fluorinated polythiophenes. Fluoroalkyl thiophene monomers, dimers and trimers were prepared. 3-Heptanoylthiophene is a key intermediate in the synthesis of …

Go to article

Development And Validation Of Physical Education Perception Of Competence Survey, Kristin Scrabis-Fletcher, Stephen J. Silvermanf Jan 2008

Development And Validation Of Physical Education Perception Of Competence Survey, Kristin Scrabis-Fletcher, Stephen J. Silvermanf

Department of Exercise Science and Physical Education Scholarship and Creative Works

The following abstract will be among those presented in the session entitled “Free Communication: Assessment and Validation of Instrumentation and Theoretical Models” scheduled for Wednesday, April 9, 2008, 10:30-11:45 a.m. This research was completed as part of the author’s dissertation work at Teacher’s College, Columbia University.

Go to article

Associative Retrieval Processes In Episodic Memory, Michael J. Kahana, Marc W. Howard, Sean M. Polyn Jan 2008

Associative Retrieval Processes In Episodic Memory, Michael J. Kahana, Marc W. Howard, Sean M. Polyn

Psychology - All Scholarship

Association and context constitute two of the central ideas in the history of episodic memory research. Following a brief discussion of the history of these ideas, we review data that demonstrate the complementary roles of temporal contiguity and semantic relatedness in determining the order in which subjects recall lists of items and the timing of their successive recalls. These analyses reveal that temporal contiguity effects persist over very long time scales, a result that challenges traditional psychological and neuroscientific models of association. The form of the temporal contiguity effect is conserved across all of the major recall tasks and even …

Go to article

Institutions Matter: Why The Herder Problem Is Not A Prisoner's Dilemma, Daniel H. C., Peter Z. Grossman Jan 2008

Institutions Matter: Why The Herder Problem Is Not A Prisoner's Dilemma, Daniel H. C., Peter Z. Grossman

Scholarship and Professional Work - Business

In the game theory literature, Garrett Hardin’s famous allegory of the “tragedy of the commons” has been modeled as a variant of the Prisoner’s Dilemma, labeled the Herder Problem (or, sometimes, the Commons Dilemma). This brief paper argues that important differences in the institutional structures of the standard Prisoner’s Dilemma and Herder Problem render the two games different in kind. Specifically, institutional impediments to communication and cooperation that ensure a dominant strategy of defection in the classic Prisoner’s Dilemma are absent in the Herder Problem. Their absence does not ensure that players will achieve a welfare-enhancing, cooperative solution to the …

Go to article

Fabrication Of Superparamagnetic And Ferromagnetic Nanoparticles, Narayan Poudyal Jan 2008

Fabrication Of Superparamagnetic And Ferromagnetic Nanoparticles, Narayan Poudyal

Physics Dissertations - Archive

Monodisperse magnetic nanoparticles with controlled size and geometry have drawn great attention in the last decade for fundamental scientific studies and for their potential applications in advanced materials and devices such as ultra high-density magnetic recording media, exchange-coupled nanocomposite magnets, biomedicine and nanodevices. This dissertation focuses on the fabrication and characterization of superparmagnetic and ferromagnetic nanoparticles of hard magnetic materials (FePt, SmCo5, Sm2Co17 and Nd2Fe14B) and soft magnetic materials (CoFe2O4, NiFe2O4 and FeCo). Novel preparation techniques including salt-matrix annealing, surfactant-assisted ball milling and magnetic field milling have been adopted in this study. The FePt nanocrystals with a variety of morphologies …

Go to article

Ecological Genetics Of Adaptive Life-History Phenotypes In The Cricket Allonemobius Socius, Diana Lea Huestis Jan 2008

Ecological Genetics Of Adaptive Life-History Phenotypes In The Cricket Allonemobius Socius, Diana Lea Huestis

Biology Dissertations - Archive

As many organisms inhabit unstable environments, the ability to respond to changing environmental conditions is highly adaptive, and results in the evolution of phenotypic plasticity. Thus, identifying the genetic basis and evolutionary origins of adaptive life-history phenotypes, such as phenotypic plasticity, is an active and important research area within the field of evolutionary biology. In the last two decades, gene-expression techniques have been developed which allow genes to be identified and gene-expression levels measured in a range of species, reducing dependence on classic genetic model systems and allowing an array of species with interesting ecological phenotypes to be used as …

Go to article

A Theoretical Exploration Of The Modern Health Care Crisis In The United States And The Lack Of Universal Health Care Coverage., Christopher Biedenbach Jan 2008

A Theoretical Exploration Of The Modern Health Care Crisis In The United States And The Lack Of Universal Health Care Coverage., Christopher Biedenbach

Sociology & Anthropology Theses - Archive

The United States is unique amongst industrialized wealthy nations in not providing health care to all of its citizens. The purpose of this thesis is to provide a theoretical explanation as to why the United States does not offer health care to all of its citizens when so many other nations do. The approach is necessarily comparative. For this paper, I compare three nations: the United States, Norway and Canada as prototypical nations (in reference to health care provision) based upon levels of government involvement in health care. I explore the historical development of health care in each of the …

Go to article

Obsessive Compulsive Disorder And Support Groups, Allison Davis Jan 2008

Obsessive Compulsive Disorder And Support Groups, Allison Davis

Communication Theses - Archive

The purpose of this qualitative study used several methodologies in order to discover why individuals with OCD choose to participate or not participate in a face-to-face and/or online support group. The primary researcher conducted a focus group, in-depth individual interviews, and open-ended online questionnaires. Three types of participants were recruited for this research: individuals with OCD who were currently in a face-to-face support group, individuals with OCD who were not currently in a support group, and individuals who were part of an online OCD support group. The two theoretical perspectives informed the research: the Health Belief Model (HBM) and the …

Go to article

Combined Scalability Coding Based On The Scalable Extension Of H.264/Avc, Sangseok Park Jan 2008

Combined Scalability Coding Based On The Scalable Extension Of H.264/Avc, Sangseok Park

Electrical Engineering Dissertations - Archive

Fine-grain scalability (FGS) based on significant and refinement coding is one of the ways to achieve quality scalability by providing a graceful quality degradation through truncations of the FGS enhancement layer. This approach is useful for video conferencing and telephony on wireless networks, which need to ensure real-time and low-delay conditions since they are subject to serious bit rate fluctuations. The simplification of FGS is proposed to reduce the overall complexity for the Progressive Refinement (PR) slice. The one pass scanning structure is introduced to simplify the coding pass of the FGS layers and the code type method is also …

Go to article

Peforming Under Pressure: An Examination Of Performance, Workload, And Measures Of Acute Stress, Robyn D. Petree Jan 2008

Peforming Under Pressure: An Examination Of Performance, Workload, And Measures Of Acute Stress, Robyn D. Petree

Psychology Theses - Archive

Although many organizations use in-basket simulations as a means of selection and development, empirical guidance regarding the design of in-baskets is lacking. This study sought to fill that gap by examining the relationships between workload, stress, and performance using an in-basket simulation. Workload was manipulated by creating three variations of a task, differing only in quantity of issues to be addressed, to see how people perform under conditions that represent too much work, a moderate amount of work, and not enough work. Salivary cortisol samples were examined to investigate participants' stress levels throughout the simulation. Results revealed that performance was …

Go to article

Visualizing The Flow Induced By An Air Curtain Over A Mannequin Using Stereo Particle Image Velocimetry, John Edward Fernandes Jan 2008

Visualizing The Flow Induced By An Air Curtain Over A Mannequin Using Stereo Particle Image Velocimetry, John Edward Fernandes

Mechanical and Aerospace Engineering Theses - Archive

Air curtains find widespread applications in today's world, such as in malls, supermarkets, airports, cold storage, etc., to allow easy pedestrian movement between two different environments. There is interest in understanding the flow induced by traffic through the air curtain in terms of energy efficiency and the ability to provide isolation from contaminants and airborne pathogens. To develop an understanding of the flow, an initial exploratory study was performed using a static mannequin. A stereo particle image velocimetry (SPIV) system was set up to map the flow of the air curtain, installed on top of the doorway, over a mannequin. …

Go to article

Characterization Of Thermal Challenges In Electronics : Leakage Current, Co-Architectural Design And Rack Level Cooling, Uthaman Raju Jan 2008

Characterization Of Thermal Challenges In Electronics : Leakage Current, Co-Architectural Design And Rack Level Cooling, Uthaman Raju

Mechanical and Aerospace Engineering Theses - Archive

Since the advent of transistors and integrated circuits the complexity and functionality of the electronic products has gone up. In line with this, the scaling of the products is catching up at all levels of packaging. Current electronics era is driven by a mantra - "Miniaturization". Recently the number of transistors on high end microprocessor has exceeded a billon mark. The design at board level becomes sophisticated to meet the growing demands. All of these lead to thermal and reliability challenges. A good thermal design is one which makes sure that the chip is operating at its rated frequency or …

Go to article

Ecological Homelessness, Steven C. Bouma-Prediger Jan 2008

Ecological Homelessness, Steven C. Bouma-Prediger

Faculty Presentations

No abstract provided.

Go to article

Practical Understandings: Teachers' Beliefs And Practices In Pronunciation Teaching, Hsing-Hui Winnie Chiu Jan 2008

Practical Understandings: Teachers' Beliefs And Practices In Pronunciation Teaching, Hsing-Hui Winnie Chiu

Linguistics & TESOL Theses - Archive

Recent discussion regarding pronunciation teaching and the global expansion of English use have encouraged formal English education in the EFL/expanding circle countries.The present study involved three native English speaking teachers (NEST) and three non-native English speaking teachers (NNEST) in an elementary school of a EFL/Expanding Circle country. The study explores teachers' practices and beliefs of pronunciation teaching in terms of the teaching context (i.e. ESL, EFL or EIL), the teaching component: segmentals or suprasegmentals, their teaching approaches, and the differences between NESTs and NNESTs. The results revealed the teachers' EFL norm-bound beliefs and practices with little EIL inclination. Moreover, the …

Go to article

A Scan Of Attributes In County Government Structure, Kevin O'Brien, Holly Cooper Whisman, Ryan Foster, Melissa Rowe Jan 2008

A Scan Of Attributes In County Government Structure, Kevin O'Brien, Holly Cooper Whisman, Ryan Foster, Melissa Rowe

All Maxine Goodman Levin School of Urban Affairs Publications

This report discusses the outcome of a national scan of models of effective county leadership and operations that might translate into alternative structures for consideration by the Commission on Cuyahoga County Government Reform. The scan produced a number of alternate county organizational structures that utilized several formats for executive, legislative, and administrative roles.

Go to article

Novel Stabilization Methods For Sulfate And Non-Sulfate Soils, Chakkrit Sirivitmaitrie Jan 2008

Novel Stabilization Methods For Sulfate And Non-Sulfate Soils, Chakkrit Sirivitmaitrie

Civil Engineering Dissertations - Archive

Expansive soils are commonly found in arid and semi-arid climate zone. These soils typically exhibit moderate to high plasticity, low to moderate strength, and high swell and shrinkage characteristic which in turn result in more swelling problems when the soil absorbs water. Both low strength characteristic and volumetric movements weaken the subgrade soils that they may lead to structural distress on road pavements. This research project was conducted at the City of Arlington, Texas. Soils in Arlington are known to be highly expansive. The expansive soils consist of both sulfate-rich soils and non-sulfate soils. This research project was conducted to …

Go to article

Mechanism Of Nanoparticle And Nanotube-Induced Cell Death, Syed Khaja Sohaebuddin Jan 2008

Mechanism Of Nanoparticle And Nanotube-Induced Cell Death, Syed Khaja Sohaebuddin

Bioengineering Theses - Archive

Recent advances in nanotechnology have lead to synthesis of high-quality nanoparticles which exhibit unique physical and chemical properties. The novel properties of these nanoparticles are widely being applied for diagnostic and therapeutic purposes and enable new means of biosensing and targeted drug delivery. However, increasing evidence has suggested that some nanoparticles may cause detrimental effects on cells and tissues. Using titanium oxide (TiO2) nanoparticles (5-10 nm diameter), silicon oxide (SiO2) nanoparticles (30 nm diameter), and multi-walled carbon nanotubes (MWCNTs) of different diameters (<8 nm, 20-30 nm, >50 nm), 0.5-2 µm in length as test subjects, we evaluated the in vitro interaction of these …

Go to article

Integration Of Hyperspectral Imaging System For Optimized Data Acquisition And Control To Revolutionized Pathology Applications, Dipen Rana Jan 2008

Integration Of Hyperspectral Imaging System For Optimized Data Acquisition And Control To Revolutionized Pathology Applications, Dipen Rana

Bioengineering Theses - Archive

Detecting and measuring the interactions and expression levels of tumor markers in a cancerous cell are quintessential in prognosis and management of cancer. These have propagated the need to develop better microscopic imaging techniques to understand the cellular structure and its functional behavior. Pathologist use techniques such immunohistochemistry and in situ hybridization to measure and detect these tumor marker expression levels. Fluorophores are used in these techniques as fluorescent tags to identify the tumor markers. These fluorophores have unique absorption and emission spectrum, making them useful to not only identify but also quantify the concentration levels of these markers. This …

Go to article

Synthesis And Characterization Of Crosslinked Urethane Doped Polyesters For Vascular Tissue Engineering, Jagannath Dey Jan 2008

Synthesis And Characterization Of Crosslinked Urethane Doped Polyesters For Vascular Tissue Engineering, Jagannath Dey

Bioengineering Theses - Archive

Traditional crosslinked polyester elastomers are inherently weak, and the strategy of increasing crosslink density to improve their mechanical properties makes them brittle materials. Biodegradable polyurethanes, although strong and elastic, do not fare well in dynamic environments due to the onset of permanent deformation. The design and development of a soft, strong and completely elastic (100% recovery from deformation) material for tissue engineering still remains a challenge. Herein, we report the synthesis and evaluation of a new class of biodegradable elastomers, crosslinked polyurethane-doped polyesters (CUPEs), which is able to satisfy the need for soft, strong, and elastic biomaterials. Tensile strength of …

Go to article

Development Of Novel Multilayered Particles For Drug Delivery And Cell Isolation Applications, Bhanuprasanth Koppolu Jan 2008

Development Of Novel Multilayered Particles For Drug Delivery And Cell Isolation Applications, Bhanuprasanth Koppolu

Bioengineering Theses - Archive

The objective of this work is to develop multilayered nanoparticles for drug delivery and cell isolation applications. These particles principally consist of three layers; biodegradable polymer, thermo sensitive polymer and magnetic materials. For drug delivery, multilayered nanoparticles (MLNP) consisting of a magnetic core and two encompassing shells made up of temperature sensitive polymer, poly (N-isopropylacrylamide) (PNIPAAm), and biodegradable polymer, poly(D, L lactide-co-glycolide) (PLGA), were developed for targeted and controlled drug delivery. The PNIPAAm layer was immobilized onto magnetic nanoparticles (MNPs) via a silane coupling agent, Vinyltrimethoxysilane (VTMS), and free radical polymerization. These particles were then encapsulated with PLGA using a …

Go to article

Hong Kong Interbank Interest Rates – Daily Figures – Hong Kong Monetary Authority, Hong Kong Monetary Authority Jan 2008

Hong Kong Interbank Interest Rates – Daily Figures – Hong Kong Monetary Authority, Hong Kong Monetary Authority

Documents

Data series was extracted using an custom API (Application Programming Interface) to pull from HKMA's open source API website.

Go to article

Teaching Critical Thinking In Osteopathy - Integrating Craft Knowledge And Evidence-Informed Approaches, Gary Fryer Jan 2008

Teaching Critical Thinking In Osteopathy - Integrating Craft Knowledge And Evidence-Informed Approaches, Gary Fryer

All KCOM Faculty Publications

Educators in the field of osteopathic manipulative medicine have a responsibility to encourage critical thinking and integration of evidence-based knowledge. Important strategies for osteopathic educators include discussion of relevant evidence as part of classroom osteopathic manual technique training; problem-based or case-based critical appraisal exercises which focus on the management of actual patients; and provision of adequate information resources in teaching clinics to support evidence-based practice. Where evidence conflicts with a particular paradigm, educators should be prepared to adapt and modify their teaching. A pragmatic approach for teaching osteopathic technique where evidence conflicts with aspects of theory and practice is outlined, …

Go to article

Fearing Islam In Uzbekistan : Islamic Tendencies, Extremist Violence, And Authoritarian Secularism, Russell Zanca Jan 2008

Fearing Islam In Uzbekistan : Islamic Tendencies, Extremist Violence, And Authoritarian Secularism, Russell Zanca

Anthropology Faculty Publications

No abstract provided.

Go to article

Catholic Social Teaching And Health Care For All, Patrick T. Mccormick M.S. Jan 2008

Catholic Social Teaching And Health Care For All, Patrick T. Mccormick M.S.

Verbum Incarnatum: An Academic Journal of Social Justice

Over 47 million Americans find themselves without health insurance in the richest and most Christian nation in the world. Catholic Social Teaching views this situation as an unjust violation of a basic human right to medical care, arguing that all persons have the right to those goods and services necessary for the proper development of life. In making this claim, Catholic Social Teaching advances three biblical principles: (1) that all persons are sacred and social, (2) that God hears the cries of the poor, and (3) that believers are directed to make a preferential option for the poor. In addition, …

Go to article

Can Silicon Carbide Nanotubes Be Effective Storage Medium For Hydrogen Storage?, Souptik Mukherjee Jan 2008

Can Silicon Carbide Nanotubes Be Effective Storage Medium For Hydrogen Storage?, Souptik Mukherjee

Physics Theses - Archive

A systematic study of molecular hydrogen adsorption on three different atomic configurations of armchair SICNTs has been performed. In the first stage of our study, first principles calculations using both density functional theory (DFT) and hybrid density functional theory (HDFT) as well as the finite cluster approximation have been performed to study the adsorption of molecular hydrogen on three types of armchair (9, 9) silicon carbide nanotubes. The distances of molecular hydrogen from the outer wall of the nanotubes have been optimized manually using the B3LYP and PW91 functionals and results have been compared in detail with published literature results. …

Go to article

Ferrimagnetism And Magnetic Entropy Change For Tm/Re Multilayers, Maria Rodica Hossu Jan 2008

Ferrimagnetism And Magnetic Entropy Change For Tm/Re Multilayers, Maria Rodica Hossu

Physics Dissertations - Archive

Multilayers of Co/Tb, Ni/Gd, NiFe/Gd, CoFe/Gd and CoNi/Gd multilayers have been synthesized using dc magnetron sputtering and have been investigated experimentally by SQUID magnetometry. Due to the antiferromagnetic coupling between the transition metal and rare earth layers these systems behave like artificial ferrimagnets, with a minimum in total magnetic moment at compensation temperature. The measurement of magnetic moment (M) as a function of temperature (T) shows that magnetic phase transition occurs at different temperatures during the heating (superheating) and cooling (supercooling) cycles resulting in thermal hysteresis curve for M (T). Magnetic entropy change has been measured for CoFe/Gd and CoNi/Gd …

Go to article

Electron Emission From Surfaces Resulting From Low Energy Positron Bombardment, Saurabh Mukherjee Jan 2008

Electron Emission From Surfaces Resulting From Low Energy Positron Bombardment, Saurabh Mukherjee

Physics Dissertations - Archive

Measurements of the secondary electron energy spectra resulting from very low energy positron bombardment of a polycrystalline Au and Cu (100) surfaces are presented that provide evidence for a single step transition from an unbound scattering state to an image potential bound state. The primary positron energy threshold for secondary electron emission and energy cutoff of the positron induced secondary electron energy peak are consistent with an Auger like process in which an incident positron make a transition from a scattering state to a surface-image potential bound while transferring all of the energy difference to an outgoing secondary electron. We …

Go to article

Good (Youth) Sports: Using Benefits-Based Programming To Increase Sportsmanship, Mary Sara Wells, Skye G. Arthur-Banning, Karen P. Paisley, Gary D. Ellis, Mark F. Roark, Kara M. Fisher Jan 2008

Good (Youth) Sports: Using Benefits-Based Programming To Increase Sportsmanship, Mary Sara Wells, Skye G. Arthur-Banning, Karen P. Paisley, Gary D. Ellis, Mark F. Roark, Kara M. Fisher

Kinesiology and Health Science Faculty Publications

Sportsmanship problems in youth sport have recently become a more prominent issue for parks and recreation professionals. Benefits-based programming is one method these professionals could use to address the issues of sportsmanship in their youth leagues. Recent studies and programs have successfully employed prosocial behavior techniques in this process as a means of improving the sportsmanship atmosphere in youth leagues. Previous research, however, has yet to compare the efficacy of such programs in comparison to a control group. Data for this study were gathered through observations of positive and negative sportsmanship behaviors youth basketball games at two local community centers. …

Go to article

First Prev Next Last