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2012

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Taking A Sensible Choice Of Sustainable Super Market Refrigeration Equipment, Rafiqul Islam Jan 2012

Taking A Sensible Choice Of Sustainable Super Market Refrigeration Equipment, Rafiqul Islam

International Refrigeration and Air Conditioning Conference

Supermarkets play a significant role in modern urban living in developed and developing nations worldwide. Technology has made it possible to provide peoples’ daily needs such as food either fresh, preserved or cooked, at the hand reach in these supermarkets. This easy lifestyle however, comes with a burden to the environment and natural resources. There are growing concerns for the sustainability of modern lifestyle in connection to worldwide population growth, increasing impact of climate change due to human activities, predicted shortage of traditional energy sources and uncertainty in alternative energy resource, New generation supermarket equipments such as refrigeration, air conditioning, …

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Workplace Dispute Resolution And Quality Of Work Life: The Worker Co-Operative Alternative, Elizabeth A. Hoffmann Jan 2012

Workplace Dispute Resolution And Quality Of Work Life: The Worker Co-Operative Alternative, Elizabeth A. Hoffmann

Department of Sociology Faculty Publications

This paper provides a concise comparison of matched pairs of conventional and worker-owned co-operative organizations operating in three industries – coal mining, taxicab driving, and organic food distribution. Worker co-operatives try to minimize hierarchy in order to maximize the power and dignity of the workers involved. Specifically, this paper examines workplace dispute resolution, a key factor in the quality of work life, and the alternative of more egalitarian, self-managed workplaces. While we think of such workplaces as being a benefit of certain professional firms, all co-operative workplaces studied here involved mostly positions that required no college education. Nevertheless, members of …

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Workplace Dispute Resolution In The Homecare Industry: The Triangle Of Worker, Client, And Manager, Elizabeth A. Hoffmann Jan 2012

Workplace Dispute Resolution In The Homecare Industry: The Triangle Of Worker, Client, And Manager, Elizabeth A. Hoffmann

Department of Sociology Faculty Publications

This study explores contrary predictions of workers' dispute resolution strategies by examining three different types of homecare businesses: a conventional, hierarchical business that is run for profit; a hierarchically organized charity; and a worker-owned, worker-managed cooperative. Some literature asserts that the structure of the organization will impact how workers address their workplace disputes. However, other literature argues the structure and culture of the industry will have greater influence than organization on workplace dispute resolution. The data in this study imply that the industry effects had the greater impact in the homecare industry. Members of the worker cooperative did not exhibit …

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Treating Diet - Induced Obesity: A New Role For Vagal Afferents?, Edward A. Fox Jan 2012

Treating Diet - Induced Obesity: A New Role For Vagal Afferents?, Edward A. Fox

Department of Psychological Sciences Faculty Publications

No abstract provided.

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Dynamical Modeling Of Stochastic Wind Flow In Street Canyons, Parham Ahranjani Mirzaei, Jan Carmeliet Jan 2012

Dynamical Modeling Of Stochastic Wind Flow In Street Canyons, Parham Ahranjani Mirzaei, Jan Carmeliet

International High Performance Buildings Conference

For decades, the borders of building studies were restricted up to the exterior walls. With better understanding the side effect of urbanization on human health and with excessive progress in new investigation tools, the area of building studies were enlarged to neighborhood environment where mass and air transport vividly interacts with the buildings. Unlike the indoor studies, one can emphasize the significance of the stochastic wind in outdoor studies. To verify the contribution of the wind velocity over/within street canyons/buildings many experimental and simulation studies have been conducted. These works were mainly designed to observe the relations between wind flow …

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Combined Heat And Moisture Transfer In Buildings Systems, Rashmin Damle, Oriol Lehmkuhl, Joaquim Rigola, Assensi Oliva Jan 2012

Combined Heat And Moisture Transfer In Buildings Systems, Rashmin Damle, Oriol Lehmkuhl, Joaquim Rigola, Assensi Oliva

International High Performance Buildings Conference

Temperature and humidity are the two main parameters indicating the comfort level of the building occupants. Although the effect of temperature is taken into account in thermal simulation of buildings, the moisture transfer through the rooms and porous building walls is sometimes neglected. The level of humidity can give different sensations of thermal comfort. It is necessary to take into account both heat and moisture transport in and around buildings to predict the hygrothermal behavior of rooms and building walls so as to calculate the energy demands correctly. In this work some benchmark exercises are worked out to see the …

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Assessing The Retrofit Potential Of Building Control Systems, Stephen J. Treado, Yan Chen Jan 2012

Assessing The Retrofit Potential Of Building Control Systems, Stephen J. Treado, Yan Chen

International High Performance Buildings Conference

It is well known that building control systems frequently under-perform, leading to wasted energy and poor space conditions for occupants. There are many reasons for this, including insufficient design or commissioning, deterioration of equipment over time, changes in building usage and poor maintenance. Therefore, building control systems are prime candidates for retrofits and upgrades. Such activities, though, can be very challenging in their own right. For example, information regarding the design intent and current control logic may be difficult or impossible to obtain due to lack of documentation, proprietary data and communication formats or unrecorded modifications. In addition, there is …

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The Design, Construction, And Performance Of A Net Zero Home In The Solar Decathlon 2011, Eric A. Holt, Sarah Miller Jan 2012

The Design, Construction, And Performance Of A Net Zero Home In The Solar Decathlon 2011, Eric A. Holt, Sarah Miller

International High Performance Buildings Conference

The Solar Decathlon is a biennial Department of Energy (DOE) collegiate contest to “promote and speed to market” solar powered, residential homes (Grose, 2009). It is a student competition wherein twenty universities are selected to design, build, and showcase residential structures that would ultimately be relocated to a competition campus in West Potomac Park in Washington D.C. to be viewed by the general public and judged by representatives of the DOE. The challenge is “design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive” (DOE). The project structures are homes that are designed and built to conform to …

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Conx Space Frame System, Purdue Ect Team Jan 2012

Conx Space Frame System, Purdue Ect Team

ECT Fact Sheets Archive

Off-site manufacture is one of the key initiatives being used by contractors to achieve these goals. Sandwich Plate System (SPS) Floors deliver a compelling off-site solution for structural floors. Their composite steel panels provide a similar performance to concrete floors at one quarter the weight, 10 - 15% shorter project schedules and broader benefits such as reduced complexity and the elimination of the majority of wet-work above ground level.

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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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