Digital Commons Network^™

Experimental Injector Element Stability Characterization And Combustion Imaging, Robert Lashawn Ikard

Theses

This research evaluated the stability characteristics of a swirl-coaxial injector in an atmospheric combustion chamber using gaseous oxygen and gaseous methane as the propellants. The experiment studies the mixing processes in a laboratory-scale analogue to full-scale engine operating conditions. The injector was tested over a range of mass flow conditions that matched specified scaling parameters for a notional space engine. The scaling parameters used were mixture ratio, velocity ratio, momentum ratio, and momentum flux ratio. A maximum amplitude of 3.52% of chamber pressure was measured when the injector was placed 19 mm from the chamber wall. The associated instability mode--determined …

Achieving Mars Sample Return On A Single Ares V Launch, Ashley Jones

Theses

No abstract provided.

The Right To Survival In The Democratic People’S Republic Of Korea, Jiyoung Song

Research Collection School of Social Sciences

For the past decade, the author has examined North Korean primary public documents and concludes that there have been changes of identities and ideas in the public discourse of human rights in the DPRK: from strong post-colonialism to Marxism-Leninism, from there to the creation of Juche as the state ideology and finally 'our style' socialism. This paper explains the background to KIM Jong Il's 'our style' human rights in North Korea: his broader framework, 'our style' socialism, with its two supporting ideational mechanisms, named 'virtuous politics' and 'military-first politics'. It analyses how some of these characteristics have disappeared while others …

Advance (Spring 2010), Georgia Southern Division Of Continuing And Professional Education

Division of Continuing & Professional Education

No abstract provided.

Eagle Executive Magazine, Georgia Southern University

College of Business: News & Publications

• Georgia Southern’s First Ph.D.
• The “R” Us Partnership
• A message from Dean Shiffler
• New IS Scholarship
• 20th Annual Accounting Day
• Hala Moddelmog Returns to Arby’s
• Linda M. Bleicken Is Beta Gamma Sigma Honoree
• MBA Business Plan Development Competition
• Spotlight on Graduate Studies
• Alumni in the spotlight
• 2010 awards of excellences
• Dean’s Citations for Student Engagement
• The Forensic Accounting Board
• William A. Freeman Memorial Lecture
• Forensic Accounting Lecture
• Alumniville
• 4th Annual Banking Symposium
• Special Providence: Ori James and Annie Sula Brannen Moxley

Armstrong Atlantic State University 2010 Fact Book, Armstrong State University

Armstrong Office of Institutional Research: Armstrong Fact Books (Archived)

No abstract provided.

Splitting The Academy: The Emotions Of Intersectionality At Work, Helen A. Moore, Katherine Acosta, Gary Perry, Crystal Edwards

Department of Sociology: Faculty Publications

Using labor market theory, we assess how we have constructed the teaching of required courses on diversity, with the potential splitting of the academy into distinctive labor markets. In-depth interviews with instructors of color and nonminorities who teach required diversity-education courses at a predominately white university are qualitatively assessed and describe the differences in the emotional labor attached to this segmented academic market.We identify specific dimensions of diversity teaching that attach to the job conditions of secondary labor markets, including the distortion of work loads and evidence of differential barriers in the emotional labor attached. These labor market conditions may …

A Study Of The Relationships In Financial Performance, Organization Size, Business Classification, And Program Maturity Of Six Sigma Systems, Diane J. Olson

All-Inclusive List of Electronic Theses and Dissertations

United States companies are facing increased competition as business continues to grow globally. This is true for large companies and small-to-medium enterprises (SMEs), as well as manufacturing and non-manufacturing organizations. To remain competitive, organizations need to improve product value, technology, customization, service, and turnaround time while reducing costs and increasing innovation. Many large manufacturers have turned to Six Sigma as a quality method to guide improvement efforts. Reported results have been significant in terms of cost reduction and the bottom line. Leaders in Six Sigma efforts have been Motorola, General Electric (GE), Allied Signal, Honeywell, and Ford. These manufacturers are …

An Evaluation Of The Effectiveness Of Corporate Communication During Large-Scalebailey College Of Engineering And Technology Changes, Dawna M. Drum

All-Inclusive List of Electronic Theses and Dissertations

The success rate ofBailey College of Engineering and Technology implementations remains low, despite decades of scholarly research and popular advice. Whether success is defined by spending within the budget, on-time completion, functionality of the final implementation, or satisfaction of the users, few projects are deemed to be complete and resounding successes. One possible reason is inadequate communication during the change process, and many studies have examined aspects of change communication such as media choice, message content, and timing of the messages. What has been missing, however, is an assessment of these items' effectiveness across hierarchical levels within an organization undergoing …

Comparison Of Pretenured And Tenured Engineering Professors', Monica F. Cox, Alene Harris

International Journal for the Scholarship of Teaching & Learning

Analyzing 36,000 strings of instructional data from fifteen faculty teaching twenty-eight courses over five semesters, the authors conducted a research study exploring differences in the pedagogical practices of pretenured and tenured faculty teaching innovative courses designed around the principles of the “How People Learn” (HPL) framework and of pretenured and tenured faculty teaching traditional, lecture-based courses. Consistent with previous research that reports that time is needed for pretenured faculty to become proficient teachers and with research that identifies lecture to be the primary teaching strategy used by engineering faculty, the current study provides additional insight into the types of pedagogical …

Developing Complex, Business-To-Business Products: Issues And Implications, Sreedhar Madhavaram, Radha Appan

Business Faculty Publications

No abstract provided.

Improving Training Impact Through Effective Follow-Up: Techniques And Their Application, Harry J. Martin

Business Faculty Publications

PURPOSE: This paper aims to describe a variety of cost-effective methods that employers can use to support training activities and promote the transfer of skills and knowledge to the workplace. These techniques work to positively impact the workplace environment through peer and supervisory support. DESIGN/METHODOLOGY/APPROACH: The application of action plans, performance assessment, peer meetings, supervisory consultations, and technical support is illustrated in two case examples. Findings - Follow-up activities resulted in improved transfer and had positive quantitative and qualitative effects on operations and firm performance. PRACTICAL IMPLICATIONS: Billions of dollars are spent annually by organisations on employee training and management …

La Loi Sur La Protection Des Obtentions Végétales; Entre Compétitivité Et Utopie, Y A-T-Il Un Avenir Pour Le Modèle?, Régine Tremblay

All Faculty Publications

Y a-t-il un avenir pour le régime de la Loi sur la protection des obtentions végétales? Cet article analyse les deux vagues majeures de législation entourant la protection et la stimulation des investissements dans le domaine des obtentions végétales au Canada et dans l‘Union européenne. Le Canada pourrait-il saisir sa chance et devenir un acteur de premier plan? Qui plus est, que peut-on apprendre et transposer d‘un régime de propriété intellectuelle sectoriel vers un régime general?

Corporate Social Responsibility In China: Window Dressing Or Structural Change?, Li-Wen Lin

All Faculty Publications

In recent years many indigenous corporate social responsibility (CSR) initiatives have emerged in China. The Chinese CSR initiatives include laws and regulations, governmental instructions and guidelines, non-governmental standards and organizations. The recent growth of the Chinese CSR initiatives deserves an analysis of the CSR development in China, especially given that China’s international image is usually associated with human rights abuses, substandard products, sweatshops, and serious environmental pollution. How sincere and serious are the Chinese CSR measures, simply window dressing or any real structural change? This article overviews major Chinese CSR initiatives and analyzes the Chinese CSR development from the perspectives …

How Much Surveillance Is Too Much? Some Thoughts On Surveillance, Democracy, And The Political Value Of Privacy, Benjamin J. Goold

All Faculty Publications

Over the past decade it has become increasingly common to speak of the emergence of a surveillance society. Surveillance is an almost inescapable part of 21st century life. There is a very real danger that individual privacy - as it is currently understood - may soon become a thing of the past. Some would argue privacy is already dead and we have no choice but to accept our newly transparent lives. For many, surveillance has become part of daily life during visit banks, stores, shopping malls, and many public streets and parks. Travel through airports subjects our bodies to physical …

Rethinking Environmental Contracting, Natasha Affolder

All Faculty Publications

Environmental contracts occupy an ill-defined middle ground between command and control regulation and voluntary initiatives. These agreements have captured the imagination of policymakers and scholars in the U.S. and Europe in particular. They are heralded as promising examples of “new governance.” This Article explores a little known example of environmental contracting which emerged in the context of a Canadian diamond mine — the Ekati Environmental Agreement. Through a fine-grained case study of the Ekati Agreement, this article challenges some of the assumptions that shape the “environmental contracting literature as well as the wider literature on “new governance.” By debunking the …

Fractional Anisotropic Diffusion For Noise Reduction In Magnetic Resonance Images, Jonathan Blackledge, Matthew Blackledge

Articles

We extend the method of anisotropic diffusion for noise reduction in digital images to the case when the diffusion processes are non-Gaussian and Levy distributed. This yields a fractional diffusion equation characterised by the Levy index. A solution to this equation is considered and a numerical algorithm developed. The algorithm is then applied as a case study to the problem of reducing noise in magnetic resonance imaging. The focus of this study is on diffusion weighted images which have low signal-to-noise ratios.

Systemic Risk Assessment Using A Non-Stationary Fractional Dynamic Stochastic Model For The Analysis Of Economic Signals, Jonathan Blackledge

Articles

This paper considers the Fractal Market Hypothesis (FMH) for assessing the risk(s) in developing a financial portfolio based on data that is available through the Internet from an increasing number of sources. Most financial risk management systems are still based on the Efficient Market Hypothesis which often fails due to the inaccuracies of the statistical models that underpin the hypothesis, in particular, that financial data are based on stationary Gaussian processes. The FMH considered in this paper assumes that financial data are non-stationary and statistically self-affine so that a risk analysis can, in principal, be applied at any time scale …

Using Virtual Reality To Enhance Electrical Safety And Design In The Built Environment, Martin Barrett, Jonathan Blackledge, Eugene Coyle

Articles

Electricity and the inherent risks associated with its use in the built environment have long since been a priority for the electrical services industry and also the general public who must live and work in this environment. By its nature virtual reality has the advantage of being safe for both the user and equipment. In addition, it offers the user an opportunity to be exposed to a range of scenarios and conditions that either occur infrequently or are hazardous to replicate. This paper presents a prototype desktop virtual reality model, to enhance electrical safety and design in the built environment. …

Spontaneous Periodic Deformations In Nonchiral Planar-Aligned Bimesogens With A Nematic-Nematic Transition And A Negative Elastic Constant, V. P. Panov, J. K. Vij, Yuri Panarin, A. Kohlmeier, M. G. Tamba, R. A. Lewis, G. H. Mehl

Articles

Hydrocarbon linked mesogenic dimers are found to exhibit an additional nematic phase below the conventional uniaxial nematic phase as confirmed by x-ray diffraction. The phase produces unusual periodic stripe domains in planar cells. The stripes are found to be parallel to the rubbing direction (in rubbed cells) with a well-defined period equal to double the cell gap. The stripes appear without external electromagnetic field, temperature or thickness gradients, rubbing or hybrid alignment treatments. Simple modeling proposes a negative sign for at least one of the two elastic constants: splay and twist, as a necessary condition for the observed pattern.

Liquid Crystal Display Modes In A Nontilted Bent-Core Biaxial Smectic Liquid Crystal, Mamatha Nagaraj, Yuri Panarin, J. K. Vij, C. Keith, C. Tschierske

Articles

Liquid crystal display (LCD) modes associated with the rotation of the secondary director in nontilted, biaxial smectic phase of an achiral bent-core compound are demonstrated. For LCDs, we find that at least four display modes are possible using SmAPA phase of the studied material, in which the minor directors in adjacent layers are aligned antiferroelectrically. The advantages of these modes include low driving field (1–2 V/ µm), high contrast ratio 1000:1, relatively fast switching time of 0.5 ms and continuous gray scale. The molecular short axis or the polar axis in a negative dielectric, biaxial material is oriented by the …

Electric Field Induced Biaxiality And The Electro-Optic Effect In A Bent-Core Nematic Liquid Crystal, Mamatha Nagaraj, Yuri Panarin, U. Manna, J. K. Vij, C. Keith, C. Tschierske

Articles

We report the observation of a biaxial nematic phase in a bent-core molecular system using polarizing microscopy, electro-optics, and dielectric spectroscopy, where we find that the biaxiality exists on a microscopic scale. An application of electric field induces a macroscopic biaxiality and in consequence gives rise to electro-optic switching. This electro-optic effect shows significant potential in applications for displays due to its fast high-contrast response. The observed electro-optic switching is explained in terms of the interaction of the ferroelectric clusters with the electric field. © 2010 American Institute of Physics.

Lots Of Moving Parts: Is Service-Learning Sustainable In A College Classroom?, Jessica Skolnikoff, Robert P. Engvall, Kc Ferrara

Arts & Sciences Faculty Publications

Engagement in the immediate community has long been a stated goal of most colleges and universities. Grand university mission statements (including our own) often convey a “commitment to community service.” While our rhetoric is lofty, how do we actually commit ourselves to pursuing this objective? How might we truly “engage” a community of scholars with the larger community? Is “true” service-learning sustainable in a college classroom? This paper addresses one method of engagement that exists on our campus: one section of the Core Curriculum “Human Behavior in Perspective,” has been transformed into a service-learning course. This course integrates the model …

The Evolution Of Euhermaphroditism In Caridean Shrimps: A Molecular Perspective Of Sexual Systems And Systematics, G. Curt Fiedler, Andrew L. Rhyne, Ryoko Segawa, Tadashi Aotsuka, Nikolaos V V. Schizas

Arts & Sciences Faculty Publications

The hippolytid genus Lysmata is characterized by simultaneous hermaphroditism, a very rare sexual system among Decapoda. Specialized cleaning behavior is reported in a few pair-living species; these life history traits vary within the genus. Unfortunately, the systematics of Lysmata and the Hippolytidae itself are in contention, making it difficult to examine these taxa for trends in life history traits. A phylogeny of Lysmata and related taxa is needed, to clarify their evolutionary relationships and the origin of their unique sexual pattern. In this study, we present a molecular phylogenetic analysis among species of Lysmata, related genera, and several putative …

Drug-Eluting Stents For Coronary Artery Disease: A Review, David Martin, Fergal Boyle

Articles

Over the past decade the introduction of drug-eluting stents (DESs) has revolutionised the treatment of coronary artery disease. However, in recent years concern has arisen over the long-term safety and efficacy of DESs due to the occurrence of late adverse clinical events such as stent thrombosis. With this concern in mind, research and development is currently centred on increasing the long-term safety and efficacy of DESs. The aim of this paper is to provide a thorough review of currently approved and promising investigational DESs. With dozens of companies involved in the development of new and innovative anti-restenotic agents, polymeric coatings …

Computational Structural Modelling Of Coronary Stent Deployment: A Review, David Martin, Fergal Boyle

Articles

The finite element (FE) method is a powerful investigative tool in the field of biomedical engineering, particularly in the analysis of medical devices such as coronary stents whose performance is extremely difficult to evaluate in vivo. In recent years, a number of FE studies have been carried out to simulate the deployment of coronary stents, and the results of these studies have been utilised to assess and optimise the performance of these devices. The aim of this paper is to provide a thorough review of the state-of-the-art research in this area, discussing the aims, methods and conclusions drawn from a …

Spectroscopic And Chemometric Approaches To Radiobiological Analyses, Aidan Meade, Hugh Byrne, Fiona Lyng

Articles

No abstract provided.

Optical Properties Of Photopolymer Layers Doped With Aluminophosphate Nanocrystals, Elsa Leite, Tzvetanka Babeva, E Ng, Vincent Toal, Svetlana Mintova, Izabela Naydenova

Articles

The optical properties of photopolymer layers consisting of an acrylamide–based matrix and microporous aluminophosphate nanocrystals of AEI- type are investigated. The compatibility of the photopolymer doped with the nanoparticles is studied. The surface and volume properties of the layers with different levels of doping with microporous nanocrystals are characterized. The effective refractive indices and absorption coefficients of the doped photopolymer layers are determined and used to calculate the refractive index and porosity of pure AEI nanoparticles used as dopants. Volume transmission gratings were recorded in the doped photopolymer layers at different spatial frequencies. By spatial monitoring of the characteristic Raman …

Two-Way Diffusion Model For Short Exposure Holographic Grating Formation In Acrylamide-Based Photopolymer, Tzvetanka Babeva, Izabela Naydenova, Dana Mackey, Suzanne Martin, Vincent Toal

Articles

A theoretical model for formation of a short exposure holographic grating is presented. The model accounts for both monomer and polymer diffusion and distinguishes between short polymer chains capable of diffusing and long polymer chains that are immobile. It is shown that the experimentally observed decrease of diffraction efficiency at higher spatial frequency can be predicted by assuming diffusion of short-chain polymers away from the bright fringes. The time evolution of the refractive index modulation after short exposure is calculated and compared with experimental results. The effects of diffusion coefficients, polymerization rates, intensity and spatial frequency of recording on the …

Optimisation Of An Acrylamide-Based Photopolymer System For Holographic Inscription Of Surface Patterns With Sub-Micron Resolution, Kevin Trainer, Kevin Wearen, Dimana Nazarova, Izabela Naydenova, Vincent Toal

Articles

We describe the optimisation of the holographic patterning of sub-micrometer surface relief structures in an acrylamide-based photopolymer. A substantial improvement in the photoinduced surface relief resolution was achieved by altering the photopolymer chemical composition and by introducing a single step post recording thermal treatment of the layers. It was observed that, by optimisation of the chemical composition of the photopolymer layers, the maximum achievable spatial frequency increases from 200 l/mm to 550 l/mm. The improvement of the surface relief amplitude by alteration of the chemical composition is limited due to the fact that both decrease of the plasticiser and increase …