Digital Commons Network^™

Two Phase Flow Cfd Analysis Of Refrigerants In A Condenser Pipe For Prediction Of Pressure Drop And Pumping Power, Aniket Ramchandra Kalambe

Mechanical and Aerospace Engineering Theses - Archive

With the ever growing need of achieving optimum cooling at chip level at the expense of low input pumping power and keeping in check the Global Warming Potential (GWP) & Ozone Depletion Potential (ODP) has given rise to “two-phase on chip cooling” with nature friendly refrigerants. Currently, “air-cooling” and “single-phase water on-chip cooling” using copper micro-channel coolers are being used but “two-phase on chip cooling” with refrigerants have a very large scale & long lasting advantages over the prior. However, due to the perceived complexity of modelling two-phase flow, this solution is not yet well understood. Modelling of two phase …

An Invastigation Of Band-Limited Fluid Damper Configuration Using Lumped Parameter Modeling, Ye Hong

Mechanical and Aerospace Engineering Theses - Archive

Vehicle suspension system is one of the key factors related to the vehicle dynamic characteristic. The fine tuning of suspension system between vehicle handling and ride comfort is not only a trade-off between these two aspects, but also, has its impact on vehicle safety and durability. For an optimal damper performance, the damper needs to generate sufficient damping force at maneuvering frequency (< 2 Hz); and it also needs to generate less damping force, which allow spring to filter the high frequency noise (> 2 Hz) generated by vehicle travels along rough road condition at speed. In order to achieve such performance, a lumped parameter model of Band-Limited Damper is proposed. Frequency response of both Conventional Damper and Band-Limited Damper are …

Computational Analysis Of Enhancing Heat Transfer In A 3-D Stacked Die Using Different Finned Heat Sink, Deekshith Pittala

Mechanical and Aerospace Engineering Theses - Archive

3D die stacking is an exciting new technology that increases the transistor’s density by integrating two or more dies vertically with a dense high – speed interface. The result of 3D die stacking is a significant reduction of interconnect both within a die and across dies in a system. The objective of the thermal design requirement for a 3D stacked die package is to maintain the junction temperatures of the devices at or below specified limits. Installing the Heat sink aid the heat transfer activity from a package. The extent of cooling and the junction temperatures vary if the designs …

Developing And Validating Thermodynamic Models For Evaporative Cooling Employed In Data Centers, Niravkumar Prabhatsinh Dodia

Mechanical and Aerospace Engineering Theses - Archive

Cooling of Data centers is of paramount importance for continuous and reliable operation of Servers housed by them. Considerable amount of total power is used to drive the cooling activity. Various different types of cooling methods have been implemented and are currently operating in various data centers. Evaporative (Indirect/Direct) Cooling is trending these days because of its ability to provide cooling at minimal cost. Previous studies have presented various cooling plants in data centers and studied them. A dedicated model for Evaporative cooling is developed and validated. The data is computed assuming the developed cooling model operating at a particular …

Experimental Study On Effects Of Segregated Cooling Provisioning On Thermal Performance Of Information Technology Servers In Air Cooled Data Centers, Ashwin Venugopal Siddarth

Mechanical and Aerospace Engineering Theses - Archive

Modern Information Technology (IT) equipment are typically assumed to operate in quiescent airflow conditions in an uncontained data center facility. In this study, the multi-scaled thermal management strategies are reconsidered at the IT chassis and rack level for a containment system. For an ideal containment configuration of airflow provisioning the entirety of conditioned air provided by the Computer Room Air Conditioning (CRAC) unit would flow through the IT equipment and return back to the CRAC. But in actuality a lack of interfaced airflow distribution exists between the amount of conditioned air provisioned to the rack and the volume capacity ingested …

A Model Analysis Of Sand Insertion In Hydraulic Fractures, Ya Hao

Mechanical and Aerospace Engineering Theses - Archive

Hydraulic fracturing (fracking) is a well-stimulation technology to create large volume of fracture formation in rocks for gas and/or oil extraction. This technology has been applied to commercially exploit natural gas in unconventional shale reservoirs that contain immense quantity but low density of hydrocarbon sources. The productivity can be largely dependent on the connectivity of fractures that must stay open. However, upon initial hydraulic fracturing, the fractures would be closed due to high hydrostatic pressure deep inside the crust. Sand must be pumped into the fractures to keep them open. An in-depth understanding of the sand distribution and its dependence …

Magnetic Field Enhanced Thermal Conductivity Analysis Of Magnetic Nanofluids, Christopher Allen

Mechanical and Aerospace Engineering Theses - Archive

The magnetic properties of four water-based nanofluids consisting of Al2O3, CuO, Fe3O4, and SiO2 were exploited to analyze the effect of the application of an external magnetic field on the thermal conductivity of the nanofluid. When the magnetic field is applied, the magnetic dipole moments of the particles align and the particles come in contact with each other and form chains in the direction of the applied magnetic field. When parallel to the direction of heat flow, the magnetic field causes the effective thermal conductivity in the direction of the magnetic field to increase. A higher thermally conductive fluid can …

Influencing Donor Decision-Making: An Examination Of Situational Determinants That Impact Donation, Floyd Kristopher

Marketing Dissertations - Archive

Research around donor decision-making has shown the importance of understanding why donors make decisions. However, much less research exists explaining how donors make decisions. Set against the backdrop of online websites and in the context of donation, this dissertation examines how web characteristics, as situational determinants, influence donor decisions. Situational determinants are influences that arise because of a specific situation where a consumer is using the product or brand; these are instances that extend beyond the basic tendencies or traits of the consumer (Belk 1974). This could be a behavioral setting, a space, or a time (Belk 1974); other situational …

Nanoparticle-Bridge Assay For Amplification-Free Electrical Detection Of Oligonucleotides, Manouchehr Teimouri

Material Science and Engineering Dissertations - Archive

The aim of this research is to investigate a highly sensitive, fast, inexpensive, and field-applicable amplification-free nanoparticle-based oligonucleotide detection method which does not rely on any enzymatic or signal amplification process. In this approach, target oligonucleotide strands are detected through the formation of nanoparticle satellites which make an electrical path between two electrodes. This method enables an extremely sensitive oligonucleotide detection because even a few oligonucleotide strands can form a single nanoparticle satellite which can solely generates an electrical output signal. Results showed that this oligonucleotide detection method can detect oligonucleotide single strands at concentrations as low as 50 femtomolar …

Material Changes Of Bone Following Ishcemia Of The Immature Femoral Head, Olumide O. Aruwajoye

Material Science and Engineering Dissertations - Archive

Legg-Calvé-Perthes disease (LCPD) is a childhood hip disorder resulting from the loss of blood flow to the femoral head. In severe cases of the disease, the femoral head can develop a flattening deformity; additionally, if the disease is diagnosed at a later stage, it leaves most patients to develop early osteoarthritis of the hip. Due to a lack of pathological specimen from patients, an experimental piglet model of femoral head ischemia was developed. The model closely follows the radiographic changes seen in LCPD patients, where there is subchondral fracture, resorption, and a flattening deformity of the femoral head. After ischemia, …

Twenty-Six Years Of Changes In Education Students’ Attitudes, Mary Lynn Crow, Mohan Pant

Curriculum and Instruction Faculty Publications - Archive

The main purpose of this quantitative study was to compare graduate education students from 1988 with graduate and undergraduate education students from 2014 in regard to their attitudes and expectations about teaching, schools, and students. The sample of participants for this study was chosen from a large public research university in North Texas and it was comprised of 50 graduate education students from 1988, 119 undergraduate and 147 graduate education students from 2014.The 2014 graduate education students were found to be significantly more negative and to have significantly lower expectations than either the graduate education students of 1988 or the …

Merging Radar-Only Qpe And Rain Gauge Data Via Conditional Bias-Penalized Optimal Estimation, Beomgeun Kim

Civil Engineering Theses - Archive

A new technique for merging radar precipitation estimates and rain gauge data is developed and evaluated to improve multisensor quantitative precipitation estimation (QPE). Various types of linear and nonlinear techniques have been used to combine rain gauge and radar data. Linear cokriging and its variants, for example, may be considered as the best linear unbiased estimators which minimize the error variance in the unconditional sense. They are, however, subject to conditional biases (CB) that may be unacceptably large for estimation of heavy-to-extreme precipitation. In this work, I develop, apply, and evaluate conditional bias-penalized cokriging (CBPCK) for spatial estimation of precipitation …

Finding Deaf Gain: Changing Languages, Changing Lenses, Changing Society, Edward Henry Bart

English Theses - Archive

Most literature is analyzed through various lenses, or more accurately, schools of thought informed by life experience and cultural knowledge. Literature created in American Sign is no different than any other literature in spite of it being a visual-spatial language rather than a sound-based language. It requires scholars able to access the Deaf Lens, cognizant of the linguistic and historical context that informed Deaf artists in the creation of their work. This context is embedded in their ASL literature, and often requires scholars to approach their work as the product of a colonized group. Though the Deaf Community does not …

Becomes A Woman Best: Female Prophetic Figures In Shakespeare's Plays, Alan Morris Cochrum

English Theses - Archive

This dissertation argues that female characters in Shakespeare’s The Winter’s Tale, Henry VIII, Richard III, Macbeth, and 1 Henry VI function as prophets in the style of the Old Testament. In a culture that venerates Holy Writ but also devalues women, a dramatic exemplar wrapped in the mantle of a biblical prophet becomes a potential model for playgoers as well as an embodied critique. Paulina, Katherine of Aragon, and Margaret of Anjou condemn injustice, uphold the cause of the vulnerable, challenge the abuse of royal and spiritual authority, and frequently echo aspects of biblical figures such as Moses, Isaiah, and …

Predicting Outcomes In Investment Treaty Arbitration, Susan Franck

Scholarly Articles in Law Reviews & Journals

Crafting appropriate dispute settlement processes is challenging for any conflict-management system, particularly for politically sensitive international economic law disputes. As the United States negotiates investment treaties with Asian and European countries, the terms of dispute settlement have become contentious. There is a vigorous debate about whether investment treaty arbitration (ITA) is an appropriate dispute settlement mechanism. While some sing the praises of ITA, others offer a spirited critique. Some critics claim that ITA is biased against states, while others suggest ITA is predictable but unfair due to factors like arbitrator identity or venue. Using data from 159 final cases derived …

The International Humanity Foundation Co-Director Training Program, Indonesia: Supporting International Volunteers, Christina Darling

Capstone Collection

The following capstone paper takes a critical look at international volunteer programs and the potential negative consequences these programs may inadvertently have on the host community. The current volunteer Co-Director program at the International Humanity Foundations (IHF) is an archetype of this phenomenon. This paper examines the ways in which IHF falls short in achieving its mission and warns of the possible neo-colonial impact its Western volunteers may be having on the local communities around IHF’s centers.

The International Humanity Foundation Co-Director Training Program, Indonesia has been created in an effort strengthen IHF’s existing program by minimizing any negative impacts …

Rebuilding Houses, Rebuilding Ukraine: Peacebuilding Through Youth Service-Learning, Katherine Tremont

Capstone Collection

In order to successfully transform conflict in a complex situation such as Ukraine, it is critical to examine projects designed by Ukrainians themselves that support and reflect Ukrainian attitudes towards conflict and peace. Lviv Education Foundation is one such Ukrainian-run organization developing and implementing peacebuilding projects between the east and west of Ukraine. From interviews with Lviv Education Foundation personnel, this paper examines the feasibility of two important peacebuilding interventions through the lenses of positive and negative peace, basic human needs, and conflict transformation through ritual. This project finds that Lviv Education Foundation’s programs encourage peacebuilding in all three of …

Conflicted Tourism : Heritage Narratives, Sectarian Schism, And Economic Growth In Northern Ireland., Ashleigh Larissa Bixby

Electronic Theses and Dissertations

This thesis examines tourism as a politically charged facet of the economic process in Northern Ireland. While violence has abated in the region, sectarian conflict continues to affect Northern Irish society. Tourism has helped develop the economy by opening the market to visitors through the marketing of the region as unique and different. As conflict in the region is ongoing, the rise of tourism as a viable economic strategy raises the question: how does the Northern Irish tourist industry reconcile the past and ongoing conflict in order to present the region as a desirable tourist destination? The answer lies in …

Meta-Analyses Of Cardiovascular Responses To Rumination : Exploring Mechanisms Linking Depression And Hostility To Cardiovascular Disease., Lorna Y. Busch

Electronic Theses and Dissertations

Rumination intensifies and prolongs cardiovascular responses to stress. This emotion regulation strategy is characteristic of depression and hostility and may be a mechanism linking these dispositions to cardiovascular disease (CVD). The current meta-analyses investigate the magnitude of cardiovascular responses to rumination and the effectiveness of distraction in curtailing these responses. A literature search identified studies with rumination conditions and corresponding cardiovascular measures. A random effects model was applied to calculate heart rate (HR), diastolic blood pressure (DBP), and systolic blood pressure (SBP) weighted effect sizes for reactivity and recovery to angry rumination, sadness rumination, and rumination on positive emotion; heart …

Plant Community Responses To Invasive Shrub And Vine Removal In An Urban Park Woodland., Eric Richard Moore

Electronic Theses and Dissertations

Counter to what some people think, urban areas can be biodiversity hotspots. Maintaining this biodiversity can be challenging, since exotic shrubs and vines block sunlight and threaten native plant regeneration. Since 2007, the Louisville Olmsted Parks Conservancy (LOPC) has spent $2 million on invasive plant management in Cherokee Park. Before the project began, long-term transects were established by the LOPC to collect baseline presence/absence data on 11 invasive plant species. In 2014, I revisited these transects and documented presence/absence data on the entire plant community. I found that four species (garlic mustard, winter creeper, Japanese honeysuckle, and English ivy) have …

Educational Excellence Through Dual Degrees : Using Symbolic Convergence Theory To Make It Happen Here., Stephanie Ann French

Electronic Theses and Dissertations

Interdisciplinary studies is a goal for the University of Louisville as it pertains to the Vision 2020 Plan. Implementing interdisciplinary studies is a part of Educational Excellence, goal number one of five strategic goals in the Vision 2020. Each of the colleges at the university has devised a strategic plan to determine how each will contribute to that goal. This specific research provides an overview of various issues pertaining to implementing programs in interdisciplinary studies. It then explores a specific instance of interdisciplinary possibilities by focusing on a single instance of what might become an exemplar of interdisciplinary studies. Specifically, …

The Czech-Egyptian Arms Deal Of 1955 : A Turning Point In Middle Eastern Cold War History., Thomas Michael Shaughnessy Skaggs

Electronic Theses and Dissertations

This study focuses on the Czechoslovakian-Egyptian arms deal of 1955 and analyzes how it impacted Middle Eastern Cold War policy. Central to the issue is Egyptian President Gamal Abdul Nasser’s approach to garnering Pan-Arab Nationalist support and his decision to approach the Soviet Bloc for weapons and economic aid. Supporting evidence came from several repositories, including the National Archives in College Park, Maryland, and the Dwight D. Eisenhower Presidential Library. In addition to primary sources, a thorough examination of the existing scholarship was conducted. In conclusion, the Czech-Egyptian arms deal, more than any other event, cemented Nasser's place as champion …

Pregnancy And Performance : Rights To The Unveiling., Takayla Justina Williams

Electronic Theses and Dissertations

Imagine you are an actress auditioning for a role, and the director asks, “If cast”, would you have conflicts?” You know you’re pregnant, but the director does not.You are also aware of the theatre’s production calendar; the production will be over before you start showing, or a couple of months before your due date. What do you do? Should you reveal the pregnancy, even though you know there is a possibility you may be discriminated against? Or do you hide it? What are the benefits and risks involved when the pregnant performer decides to conceal her pregnancy? This thesis serves …

Increasing Rates Of Specific Praise And Otr Provided By Para-Educators In Special Education Classrooms, Jordan Christopher Politte

Graduate Theses/Dissertations

Increasing behavior specific praise and the opportunities to respond (OTR) in a classroom increases the likelihood that students will engage in learning activities and socially appropriate behavior. This study was focused to investigate the effects of on increasing para-educator's use of positive praise and the opportunities to respond in small group reading lessons. This study employed four single-subject withdrawal designs were employed in this study. Two were ABAB, the third was ABABC, and the fourth was ABCAC. The interventions consisted of the para-educators receiving training in the area of behavior specific positive praise and opportunities to respond. After each lesson …

Writing Trauma In Iraq: Literary Representations Of War And Oppression In The Fiction Of Sinan Antoon, Zahraa Qasim Habeeb

Graduate Theses/Dissertations

The Iraqi war narrative reflects the traumatizing situation that omnipresence of war and three decades of oppression have caused to Iraqis' views of life. Writing about their traumatic experience is an essential way of giving voice to their wounds. The Iraqi American novelist Sinan Antoon is a "wounded storyteller" who is able to give words to the wounds of his homeland. His two novels, I'jaam: An Iraqi Rhapsody and The Corpse Washer, address the physical and psychological trauma of wars and prolonged years of oppression in Iraq. Academic research and literary production about the effect of trauma presented in the …

Terrorism And The Rise Of Isis In Egypt, Jantzen William Garnett

Graduate Theses/Dissertations

Using mostly primary source materials this thesis seeks to understand the evolution of and linkages between different terrorist organization that have operated in Egypt and the Sinai, in particular. Of particular interest was the terrorist group Ansar Bayt al-Maqdis (ABM) which later became an Islamic State in Iraq and al-Sham [Syria] (ISIS) affiliate known as Wilayat Sinai. The thesis then documents the group's operations and shows how it has evolved over the past five years into one of ISIS' most lethal affiliates. ISIS' expansion into Egypt by incorporating ABM into its global terrorist network has increased the threat posed by …

An Affect Theory Of Composition, Lindsey L. Novak

Graduate Theses/Dissertations

This thesis explores the effect that being published in an online journal has on students' attitudes about writing and their willingness to revise. The impetus for the study was a combination of frustration at seeing the students in the Writing Center devaluing their own work, as well as my own experiences within the academy at large. The problem was that these students were neither seen as "good writers" within an academic setting, nor believed themselves to be such. The methods employed were the creation of a WordPress webpage, with a URL redirect ("boldjournal.org") which served as a forum in which …

Commencement Program 2015 December: College Of Architecture, Planning And Public Affairs; School Of Social Work; University College, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

External Corporate Governance And Misreporting, William R. Baber, Lihong Liang, Sok-Hyon Kang, Zinan Zhu

Accounting - All Scholarship

This study investigates how external corporate governance provisions, specifically statutory and corporate charter provisions that limit direct shareholder participation in the governance process, affect the likelihood of an accounting restatement. The analysis indicates that strong external governance (fewer restrictions on shareholder participation) is associated with a relatively low incidence of accounting restatements. The effect of external governance is incremental to that of internal governance, which is considered as provisions that foster effective board oversight of management. Such evidence supports the premise that shareholder participation improves financial reporting quality.

Hacking The Urban Village | Architecture As Board Game, Xuyun Liu

Architecture Senior Theses

This thesis proposes the board game as a new research methodology and platform for the study of southern China's urban villages.

Hacking the Urban Village examines the urban villages that have, in recent decades, become a common but informal settlement type in China as a result of China's unprecedented period of urbanization.

This research forms the contextual core of a board game where game settings present the current urban conditions and players may explore alternative forms of urbanism. The board game offers players the opportunity to investigate both he formal conditions of the urban village life along with it attendant …