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2012

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Thermal Management Challenges In Telecommunication Systems And Data Centers, S V. Garimella, L.-T. Yeh, T. Persoons Jan 2012

Thermal Management Challenges In Telecommunication Systems And Data Centers, S V. Garimella, L.-T. Yeh, T. Persoons

CTRC Research Publications

The framework for this paper is the growing concern about the worldwide increasing energy consumption of telecommunications systems and data centers, and particularly the contribution of the thermal management system. The present energy usage of these systems is discussed, as well as the relationship between cooling system design and the total cost of ownership. This paper identifies immediate and future thermal bottlenecks facing the industry, ranging from technological issues at the component and system level to more general needs involving reliability, modularity, and multidisciplinary design. Based on this enumeration, the main challenges to implementing cooling solutions are reviewed. Particular attention …

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Alternative Heat Rejection Methods For Power Plants, R. A. Leffler, C. R. Bradshaw, E. A. Groll, S V. Garimella Jan 2012

Alternative Heat Rejection Methods For Power Plants, R. A. Leffler, C. R. Bradshaw, E. A. Groll, S V. Garimella

CTRC Research Publications

Process waste heat in large power generation plants is commonly rejected to lakes or rivers, or through the use of cooling towers. Although these waste heat rejection methods are effective, they may not be feasible in every application due to cost considerations or geographic location. Moreover, it is desirable to put some of the waste heat to good use, both from the standpoint of improved plant efficiency as well as reduced environmental impact. An analysis of alternative methods of power plant waste heat rejection is presented here as applied to a coal-fired power generation facility in the Midwestern United States. …

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Multi-Objective Optimization Of Sustainable Single-Effect Water/Lithium Bromide Absorption Cycle, B. H. Gebreslassie, E. A. Groll, S V. Garimella Jan 2012

Multi-Objective Optimization Of Sustainable Single-Effect Water/Lithium Bromide Absorption Cycle, B. H. Gebreslassie, E. A. Groll, S V. Garimella

CTRC Research Publications

A rigorous mathematical approach is developed for optimization of sustainable single-effect water/ Lithium Bromide (LiBr) absorption cooling cycles. The multi-objective formulation accounts for minimization of the chiller area as well as the environmental impact associated with the operation of the absorption cycle. The environmental impact is quantified based on the global warming potential and the Eco-indicator 99, both of which follow principles of life cycle assessment. The design task is formulated as a bi-criterion non-linear programming problem, the solution of which is defined by a set of Pareto points that represent the optimal compromise between the total area of the …

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Processes Involving Acid Gas Solubility In Room Temperature Ionic Liquids (Rtils), Fadekemi E. Osideinde Jan 2012

Processes Involving Acid Gas Solubility In Room Temperature Ionic Liquids (Rtils), Fadekemi E. Osideinde

Electronic Theses and Dissertations

The literature contains a number of thermodynamic studies involving the solubility of acid gases in RTILs. This thesis looks at using these studies in the context of two processes: membrane separation and absorption refrigeration cycles. The first part of this study investigated the separation of a mixed dry gas feed of CO2/CH4 by four Stabilized Ionic Liquid Membranes (SILMs); 1-Ethyl-3-methlyimidazolium dicyanamide, [emim][DCA], 1-ethyl-3-methylimidazolium thiocyanate, [emim][SCN], 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [emim][Tf2N] and 1-Butyl-3-methylimidazolium nitrate, [bmim][NO 3]. The selectivities and permeances for the CO2/CH 4 feed were measured in all four SILMs at various partial pressures of CO2 in the feed and at two …

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Design And Synthesis Of Hiv-1 Integrase Inhibitors, Sarah Chajkowski Scarry Jan 2012

Design And Synthesis Of Hiv-1 Integrase Inhibitors, Sarah Chajkowski Scarry

Electronic Theses and Dissertations

In recent years, HIV-1 integrase (IN) has emerged as an attractive target for the treatment of human immunodeficiency virus type 1 (HIV-1), the causative pathogen of acquired immuno-deficiency syndrome (AIDS). Several classes of IN inhibitors are known but many of these compounds are toxic, do not show antiviral activity or display decreased potency. Therefore, new classes of potent IN inhibitors are desperately needed. The b-diketo (b-DK) class of compounds has emerged as one of the most successful classes of IN inhibitors. Although several b-DK inhibitors with potent antiviral activity are known, compounds containing b-DK motifs have limitations in drug development. …

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How Do The Perceived Barriers, Attitudes, And Knowledge Of Grocery Store Personnel Affect Availability Of Organic Food Products?, Rachel Adams Jan 2012

How Do The Perceived Barriers, Attitudes, And Knowledge Of Grocery Store Personnel Affect Availability Of Organic Food Products?, Rachel Adams

Electronic Theses and Dissertations

Organic food is one of the fastest-growing segments of food production and consumption in the U.S. Even though organic foods are becoming more widely available, some studies suggest they may not be equally available to all populations because people in some areas are being excluded from the organics market either geographically or financially. The purpose of this study was to examine how individual and local characteristics affect the attitudes of grocery store personnel toward organic food products and how these attitudes affect availability. Grocery store personnel were surveyed about their attitudes toward organic foods, their perceptions of the barriers to …

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Identifying Dysfunction In Persistent Social Deviance: Perspective Taking As A Mediator Of The Relationship Between Psychopathy And Social Aggression, Olga Vadymovna Berkout Jan 2012

Identifying Dysfunction In Persistent Social Deviance: Perspective Taking As A Mediator Of The Relationship Between Psychopathy And Social Aggression, Olga Vadymovna Berkout

Electronic Theses and Dissertations

Psychopathy has been associated with social aggression in a number of studies. Perspective taking (e.g. theory of mind and empathy) has been inversely associated with both psychopathy and social aggression, suggesting that it may serve as a potential mediator of this relationship. Structural equation modeling (SEM) was used to assess perspective taking as a potential partial mediator of the relationship between psychopathy and social aggression in a sample of 439 undergraduates. Although bivariate correlations produced the expected negative relationships between perspective taking and psychopathy and social aggression, perspective taking did not function as a mediator in the SEM analysis. Implications …

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Thermodynamic And Kinetic Investigation Of A Chemical Reaction-Based Miniature Heat Pump, Scott M. Flueckiger, Fabien Volle, S V. Garimella, Rajiv K. Mongia Jan 2012

Thermodynamic And Kinetic Investigation Of A Chemical Reaction-Based Miniature Heat Pump, Scott M. Flueckiger, Fabien Volle, S V. Garimella, Rajiv K. Mongia

CTRC Research Publications

Representative reversible endothermic chemical reactions (paraldehyde depolymerization and 2-proponal dehydrogenation) are theoretically assessed for their use in a chemical heat pump design for compact thermal management applications. Equilibrium and dynamic simulations are undertaken to explore the operation of the heat pump which upgrades waste heat from near room temperature by approximately 20 degrees in a minimized system volume. A model is developed based on system mass and energy balances coupled with kinetic equations to ascertain mixture conditions at each state point in the loop, as well as mass flow rate, minimum work input, and minimum endothermic reactor volume according to …

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Frequent Flier Perceptions And Air Travel Satisfaction: The Airline Passenger Survey 2012, Erin E. Bowen, Brent D. Bowen, Dean E. Headley Jan 2012

Frequent Flier Perceptions And Air Travel Satisfaction: The Airline Passenger Survey 2012, Erin E. Bowen, Brent D. Bowen, Dean E. Headley

Airline Passenger Surveys

The Airline Passenger Survey is an annual survey of frequent fliers who visit the web site for the Airline Quality Rating. Since 2009, over 4,000 passengers have responded to researchers’ request to provide a consumer perspective on the quality of today’s air travel experience. Airline Quality Rating researchers at Purdue University and Wichita State University compare the consumer experience of air travel with the objective rankings of the Airline Quality Rating (www.airlinequalityrating.com). These detailed findings are provided publicly and periodically released to the media.

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Development Of High Efficiency Carbon Dioxide Commercial Heat Pump Water Heater, Chad D. Bowers, Stefan Elbel, Michael Petersen, Predrag S. Hrnjak Jan 2012

Development Of High Efficiency Carbon Dioxide Commercial Heat Pump Water Heater, Chad D. Bowers, Stefan Elbel, Michael Petersen, Predrag S. Hrnjak

International Refrigeration and Air Conditioning Conference

Although heat pump water heaters are today widely accepted in both Japan and Europe, where energy costs are high and government incentives for their use exist, acceptance of such products in the US has been limited. While this trend is slowly changing with the introduction of heat pump water heaters into the residential market, but acceptance remains low in the commercial sector. The objective of the presented work is the development of a high efficiency R744 heat pump water heater for commercial applications with effective utilization of the cooling capability for air conditioning and/or refrigeration. The ultimate goal is to …

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Personal Cooling System Based On Vapor Compression Cycle For Stock Car Racing Drivers, André Morriesen, Frederico E. Resende, Luciana W. S. L. Ramos, Paulo R. C. Couto, Guilherme Borges Ribeiro Jan 2012

Personal Cooling System Based On Vapor Compression Cycle For Stock Car Racing Drivers, André Morriesen, Frederico E. Resende, Luciana W. S. L. Ramos, Paulo R. C. Couto, Guilherme Borges Ribeiro

International Refrigeration and Air Conditioning Conference

This work is related to the design, fabrication and test of a personal cooling system prototype for Stock Car racing pilots, who are exposed to very high temperatures inside the cockpit. The solution is based on a compact vapor compression system, which cools a secondary fluid that flows through the pilot vest. An experimental apparatus was especially developed for the prototype evaluation, simulating real environmental conditions. Subject tests were also performed and indicated the potential of such solution.

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Biology And Nursing Students’ Perceptions Of A Web-Based Information Literacy Tutorial, Sharon A. Weiner, Nancy Pelaez, Karen Chang, John M. Weiner Jan 2012

Biology And Nursing Students’ Perceptions Of A Web-Based Information Literacy Tutorial, Sharon A. Weiner, Nancy Pelaez, Karen Chang, John M. Weiner

Libraries Faculty and Staff Scholarship and Research

This study examined the perceptions of two groups of students to obtain different perspectives on the online information literacy tutorial, CORE (Comprehensive Online Research Education, to plan for its update. The CORE tutorial includes seven modules: “Planning Your Project,” “Topic Exploration,” “Types of Information,” “Search Tools,” “Search Strategies,” “Evaluating Sources,” and “Copyright, Plagiarism, and Citing Sources.” First-year students in biology and nursing courses responded to a survey after completing the CORE modules. Students indicated that they liked learning through an online tutorial. However, they thought that the tutorial could be improved with shorter modules and the addition of video and …

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Co-Designing, Co-Developing, And Co-Implementing An Institutional Data Repository Service, Michael Witt Jan 2012

Co-Designing, Co-Developing, And Co-Implementing An Institutional Data Repository Service, Michael Witt

Libraries Faculty and Staff Scholarship and Research

In January of 2011, the National Science Foundation began requiring that all proposals for research funding include data management plans. At the time of the mandate, Purdue University's library and campus information technology units had been collaborating on enhancements to the HUBzero virtual research environment. These efforts were parlayed into the development of an institutional, digital data repository and service with the support of the campus research office. In the process, local library science practices have been extended to facilitate research data curation and cyberinfrastructure on campus. Librarians are consulting on data management plans, conducting data reference and instruction, advising …

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Assessing Change In Socially Inhibited Interpersonal Subtype Through Focused Brief Group Therapy, David A. Yutrzenka Jan 2012

Assessing Change In Socially Inhibited Interpersonal Subtype Through Focused Brief Group Therapy, David A. Yutrzenka

Browse all Theses and Dissertations

An outcome study of effectiveness was completed for the Focused Brief Group Therapy (FBGT) at a college counseling wellness service center concerning individuals who endorsed distress due to a specific interpersonal type, social inhibition. Pre-existing data from the Inventory of Interpersonal Problems-32 (IIP-32) and the Counseling Center Assessment of Psychological Symptoms (CCAPS) was analyzed for these individuals prior to and after completion of FBGT. This researcher hypothesized that through the process of the groups, statistically significant decrease in scores of Social Inhibition, Total Interpersonal Distress, Depression, Social Anxiety, Generalized Anxiety and Academic Distress as a function of the group process …

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When Laws And Representation Are Not Enough: Enduring Impunity And Post-Conflict Sexual Violence In Liberia And Sierra Leone, Ashley D. Kitchen Jan 2012

When Laws And Representation Are Not Enough: Enduring Impunity And Post-Conflict Sexual Violence In Liberia And Sierra Leone, Ashley D. Kitchen

Browse all Theses and Dissertations

Throughout the course of history, literature and examination on the impact of civil war has focused little on women, especially in the cases of wartime rape. While the factors which sustain wartime rape are examined with frequency, using gender as an analytical lens, the analysis regarding post-conflict sexual violence and rape is studied far less, leading to the question: what factors are correlated with the continuance of widespread acts of rape even after the cessation of official conflict? Liberia and Sierra Leone suffered high levels of both wartime rape and also post-conflict sexual violence. This comparative case study, using process …

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The Changing Definition And Role Of Collections And Services In The University Research Library, James L. Mullins Jan 2012

The Changing Definition And Role Of Collections And Services In The University Research Library, James L. Mullins

Libraries Faculty and Staff Scholarship and Research

No abstract provided.

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Knowledge-Enabled Engineering Design: Toward An Integrated Model, Michael Fosmire, David Radcliffe Jan 2012

Knowledge-Enabled Engineering Design: Toward An Integrated Model, Michael Fosmire, David Radcliffe

Libraries Faculty and Staff Scholarship and Research

Librarians and engineering faculty have long understood that design is one of the defining processes of the engineering profession. In an increasingly knowledge-driven society, students need to efficiently locate, assess and integrate relevant information into their design process so that they can develop innovation solutions to emerging complex, global grand challenges. Increasingly, engineering curricula are incorporating design as early as the first year, but a question remains as to how effectively information literacy is being integrated into these early experiences of design. For example, the Engineering Change study found there has been very little improvement to lifelong learning skills in …

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The Librarian And The Designer: Working Together To Create A Showcase For Contemporary Learning, Tomalee Doan Jan 2012

The Librarian And The Designer: Working Together To Create A Showcase For Contemporary Learning, Tomalee Doan

Libraries Faculty and Staff Scholarship and Research

Many institutions of higher education are designing spaces that reflect the established correlation between learning spaces and student achievement, mastery, and retention (Hunley & Schaller, 2006). In this case study of a renovation of an 18,327 square foot business library space into a dynamic learning environment, Melinda McGee, the Interior Designer for the project, and Tomalee Doan, the Associate Professor and Head Librarian of the business library, share the experience of their successful partnership that required a creative and an in-depth collaboration with each other and with several other stakeholders not usually found in an academic setting. Their goal is …

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Tied Kronecker Product Graph Models To Capture Variance In Network Populations, Sebastian Moreno, Jennifer Neville, Sergey Kirshner Jan 2012

Tied Kronecker Product Graph Models To Capture Variance In Network Populations, Sebastian Moreno, Jennifer Neville, Sergey Kirshner

Department of Computer Science Technical Reports

No abstract provided.

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Investigation Of Low Gwp Refrigerant Interaction With Various Lubricant Candidates, Roger J. Beattie, Joseph A. Karnaz Jan 2012

Investigation Of Low Gwp Refrigerant Interaction With Various Lubricant Candidates, Roger J. Beattie, Joseph A. Karnaz

International Refrigeration and Air Conditioning Conference

Refrigerants used in various air conditioning and refrigeration industries are going through changes today and continued changes into the near future. These changes are being driven by environmental and energy efficiency regulations and could result in the use of refrigerants that require the investigation of new lubricants. One such change is the use of refrigerants that carry a lower global warming potential (GWP) value then current refrigerants used in the market. Some of these refrigerants present certain challenges over current refrigerants such as changes in flammability requirements, higher pressures or stability of the refrigerant in system operation. These refrigerants and …

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Non-Intrusive Fault Detection In Reciprocating Compressors, Christopher James Schantz, Steven Leeb Jan 2012

Non-Intrusive Fault Detection In Reciprocating Compressors, Christopher James Schantz, Steven Leeb

International Refrigeration and Air Conditioning Conference

This research presents techniques developed for non-intrusive sensing and fault detection in reciprocating compressors driven by induction motors. These procedures are “non-intrusive” because they rely only on voltage and current signals measured on the compressor power cable. The electrical sensor based method allows for easy and non-intrusive determination of many fault sensitive signals that usually require complicated, expensive, and time consuming operations to measure. The electric signals are processed and used with the inverted dynamic motor model equations and motor parameters (which are also determined non-intrusively) to recover the instantaneous angular speed of the compressor shaft, as well as the …

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Comparison Of Earth-Air And Earth-Water Ground Tube Heat Exchangers For Residentialal Application, Christophe T’Joen, Liping Liu, M. De Paepe Jan 2012

Comparison Of Earth-Air And Earth-Water Ground Tube Heat Exchangers For Residentialal Application, Christophe T’Joen, Liping Liu, M. De Paepe

International Refrigeration and Air Conditioning Conference

Earth-air systems are already commonly applied as a passive technique to reduce the overall energy use of buildings by reducing the required cooling or heating demand. However, they often require large surface area for their installation, and make use of large diameter tubes to reduce the pressure drop. As an alternative, waterearth systems are being considered. To explore these two options, one dimensional analytical models were derived. The impact of different design parameters, including tube length, tube diameter, fluid flow rate, etc., have been investigated. For the earth-air system, it is shown that for high Reynolds numbers, the soil resistance …

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Domestic Hot Water Supply For Multiple Familiy Dwellings Using Heat Pumps, Bernhard Vetsch, Andreas Gschwend, Stefan S. Bertsch Jan 2012

Domestic Hot Water Supply For Multiple Familiy Dwellings Using Heat Pumps, Bernhard Vetsch, Andreas Gschwend, Stefan S. Bertsch

International Refrigeration and Air Conditioning Conference

In multiple family dwellings of central Europe heat pumps are not only used for space heating but also increasingly for domestic hot water (dhw) supply. The water is often heated in a centralized or decentralized installation with a large distribution network. This leads to the combination of heat pumps with various trace heating systems to ensure both comfort and protection from legionella disease. The COP of the heat pump can be greatly affected by the choice of the heat tracing system which influences the overall efficiency (OE) of the domestic hot water supply system significantly. In this study several heat …

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Efficient Coding And Statistically Optimal Weighting Of Covariance Among Acoustic Attributes In Novel Sounds, Keith Kluender R., Christian E. Stilp Jan 2012

Efficient Coding And Statistically Optimal Weighting Of Covariance Among Acoustic Attributes In Novel Sounds, Keith Kluender R., Christian E. Stilp

Department of Speech, Language, and Hearing Sciences Faculty Publications

To the extent that sensorineural systems are efficient, redundancy should be extracted to optimize transmission of information, but perceptual evidence for this has been limited. Stilp and colleagues recently reported efficient coding of robust correlation (r =. 97) among complex acoustic attributes (attack/decay, spectral shape) in novel sounds. Discrimination of sounds orthogonal to the correlation was initially inferior but later comparable to that of sounds obeying the correlation. These effects were attenuated for less-correlated stimuli (r =. 54) for reasons that are unclear. Here, statistical properties of correlation among acoustic attributes essential for perceptual organization are investigated. Overall, simple strength …

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Conceptual Changes To The Definition Of Borderline Personality Disorder Proposed For Dsm-5, Douglas B. Samuel, Joshua D. Miller, Thomas A. Widiger, Donald R. Lynam, Paul A. Pilkonis, Samuel A. Ball Jan 2012

Conceptual Changes To The Definition Of Borderline Personality Disorder Proposed For Dsm-5, Douglas B. Samuel, Joshua D. Miller, Thomas A. Widiger, Donald R. Lynam, Paul A. Pilkonis, Samuel A. Ball

Department of Psychological Sciences Faculty Publications

The DSM-5 Personality and Personality Disorders Work Group proposed the elimination of diagnostic criterion sets in favor of a prototype matching system that defines personality disorders using narrative descriptions. Although some research supports this general approach, no empirical studies have yet examined the specific definitions proposed for DSM-5. Given the wide interest in borderline personality disorder (BPD), it is crucial to determine how this methodological shift might affect the content and conceptualization of the diagnosis. Eighty-two experts on BPD provided ratings of the DSM-IV-TR or DSM-5 version of BPD in terms of 37 traits proposed for DSM-5. Analyses revealed significant …

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Learning And Transfer Of Category Knowledge In An Indirect Categorization Task, Sebastien Helie, F Gregory Ashby Jan 2012

Learning And Transfer Of Category Knowledge In An Indirect Categorization Task, Sebastien Helie, F Gregory Ashby

Department of Psychological Sciences Faculty Publications

Knowledge representations acquired during category learning experiments are ‘tuned’ to the task goal. A useful paradigm to study category representations is indirect category learning. In the present article, we propose a new indirect categorization task called the “Same” – “Different” categorization task. The same-different categorization task is a regular same-different task, but the question asked to the participants is about the stimulus category membership instead of stimulus identity. Experiment 1 explores the possibility of indirectly learning rule-based and information-integration category structures using the new paradigm. The results suggest that there is little learning about the category structures resulting from an …

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2011 & 2012 Rosabeth Moss Kanter Award For Excellence In Work-Family Research Publication, Center For Families, Center For Work And Families Jan 2012

2011 & 2012 Rosabeth Moss Kanter Award For Excellence In Work-Family Research Publication, Center For Families, Center For Work And Families

Center for Families Publications

No abstract provided.

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The Effect Of Visualized Student's Self-Set Learning Progress Goals On East Asian Chinese Student's Motivation And Self Confidence In Learning, Yu Ao Jan 2012

The Effect Of Visualized Student's Self-Set Learning Progress Goals On East Asian Chinese Student's Motivation And Self Confidence In Learning, Yu Ao

Electronic Theses and Dissertations

This study was conducted to determine if visualized goal achievement can help enhance East Asian Chinese students‟ motivation in learning and elevate their confidence in reaching their goals thus improving their performance. The goal achievement was visualized on a goal achievement progress chart that was self-created and self-managed by the East Asian Chinese students and the goal creating was under the supervision of their instructor. In this study, literature reviews on the theories, previous research studies in the perspectives of East Asian students‟ motivation in learning, goal setting on motivation, self-determination, self-efficacy, and expectancy theories are conducted to provide theoretical …

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Development And Evaluation Of An Instrument To Measure Mother-Infant Togetherness After Childbirth, Carol Lawrence Jan 2012

Development And Evaluation Of An Instrument To Measure Mother-Infant Togetherness After Childbirth, Carol Lawrence

Electronic Theses and Dissertations

No existing measure to date captures mother-infant togetherness. A valid measure of togetherness is essential to engage in evidence-based practice, evaluate obstetric delivery models and nursing interventions, and measure the level of togetherness which promotes optimal maternal-infant outcomes. When together and in close proximity, a women and her infant have access to one another to allow for mutual caregiving or caregiving on cue. A new measure entitled the Mother-Infant Togetherness Scale (MITS) was developed based on a review of the literature and conceptual framework of Mother-Newborn Mutual Caregiving. The MITS is a 35- item instrument composed of four subscales that …

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A New Semantic Similarity Join Method Using Diffusion Maps And Long String Table Attributes, Bilal Hani Hawashin Jan 2012

A New Semantic Similarity Join Method Using Diffusion Maps And Long String Table Attributes, Bilal Hani Hawashin

Wayne State University Dissertations

With the rapid increase of the distributed data sources, and in order to make information integration, there is a need to combine the information that refers to the same entity from different sources. However, there are no global conventions that control the format of the data, and it is impractical to impose such global conventions. Also, there could be some spelling errors in the data as it is entered manually in most of the cases. For such reasons, the need to find and join similar records instead of exact records is important in order to integrate the data. Most of …

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