Digital Commons Network^™

Optimization Of The Pre-Outlet And Main-Outlet Bores In Scroll Compressors, Rico Baumgart, Joerg Aurich

International Compressor Engineering Conference

No abstract provided.

Initial Design And Experimental Results Of A Novel Near-Isothermal Compressor For Heat Pump Applications, Stephen Kowalski, Joseph Rendall, Ahmad Abu-Heiba, Praveen Cheekatamarla, Anthony Gehl, Ayyoub Momen, Nawaz Kashif

International Compressor Engineering Conference

No abstract provided.

Vibration Mount Optimization Of Two-Stage Screw Compressors With Harmonic Analysis, Hükümran Selim Ertürk, Buğrahan Bahadır, Sinan Pi̇şi̇ri̇ci̇

International Compressor Engineering Conference

No abstract provided.

Dynamic Simulation And Anti-Surge System Design Of A Demethanizer Compression Unit, Mahshid Zaresharif, Jafar Hooshmand

International Compressor Engineering Conference

No abstract provided.

Modeling Air Handling Units To Create A Diverse Fault Dataset For Fdd Innovation: Lessons Learned And Recommendations, Armando Casillas, Yimin Chen, Guanjing Lin, Jessica Granderson, Sen Huang, Zhelun Chen

International High Performance Buildings Conference

No abstract provided.

Concentrated Radiative Cooling, J. Peoples, Y.-W. Hung, X. Li, D. Gallagher, N. Fruehe, M. Pottschmidt, C. Breseman, C. Adams, A. Yuksel, J. Braun, W. T. Horton, X. Ruan

CTRC Research Publications

No abstract provided.

Mapping Religious Sites In China: A Research Note, Jackie Henke, Fenggang Yang

Department of Sociology Faculty Publications

Drawing from visual studies scholarship, we highlight current and persistent critiques of sociological visualization, note recent developments in visualization tools for sociologists, and propose how sociologists can be reflective about their visualization choices. As a case study, we outline the visualization development and selection process in our project of mapping Chinese religious venues. We explain the visualization challenges we faced, the visual biases we hoped to manage, the strengths and limitations of various visualization methods we identified, and how we selected visualizations for varying research queries. In addition, we provide a list of considerations for fellow sociologists working to visualize …

Phonetic Feature Size In Second Language Acquisition: Examining Vot In Voiceless And Voiced Stops, Daniel J. Olson

School of Languages and Cultures Faculty Publications

Featural approaches to second language phonetic acquisition posit that the development of new phonetic norms relies on sub-phonemic features, expressed through a constellation of articulatory gestures and their corresponding acoustic cues, which may be shared across multiple phonemes. Within featural approaches, largely supported by research in speech perception, debate remains as to the fundamental scope or “size” of featural units. The current study examines potential featural relationships between voiceless and voiced stop consonants, as expressed through the voice onset time cue. Native English-speaking learners of Spanish received targeted training on Spanish voiceless stop consonant production through a visual feedback paradigm. …

Evaluation Of A Graphene Enhanced Photocatalytic Oxidation Device, Paul Gerard Hoertz, Stephen Kujak, Kathleen Owen

International High Performance Buildings Conference

No abstract provided.

Smart Low-Cost Thermal Imaging Acquisition Towards Personal Comfort Prediction, Ati Soleimanijavid, Iason Konstantzos

International High Performance Buildings Conference

No abstract provided.

Reflections On Software Failure Analysis, Paschal C. Amusuo, Aishwarya Sharma, Siddharth R. Rao, Abbey Vincent, James C. Davis

Department of Electrical and Computer Engineering Faculty Publications

Failure studies are important in revealing the root causes, behaviors, and life cycle of defects in software systems. These studies either focus on understanding the characteristics of defects in specific classes of systems or the characteristics of a specific type of defect in the systems it manifests in. Failure studies have influenced various software engineering research directions, especially in the area of software evolution, defect detection, and program repair.

In this paper, we reflect on the conduct of failure studies in software engineering. We reviewed a sample of 52 failure study papers. We identified several recurring problems in these studies, …

Sok: Analysis Of Software Supply Chain Security By Establishing Secure Design Properties, Chinenye Okafor, Taylor R. Schorlemmer, Santiao Torres-Arias, James C. Davis

Department of Electrical and Computer Engineering Faculty Publications

This paper systematizes knowledge about secure software supply chain patterns. It identifies four stages of a software supply chain attack and proposes three security properties crucial for a secured supply chain: transparency, validity, and separation. The paper describes current security approaches and maps them to the proposed security properties, including research ideas and case studies of supply chains in practice. It discusses the strengths and weaknesses of current approaches relative to known attacks and details the various security frameworks put out to ensure the security of the software supply chain. Finally, the paper highlights potential gaps in actor and operation-centered …

Exploiting Input Sanitization For Regex Denial Of Service, Efe Barlas, Xin Du, James C. Davis

Department of Electrical and Computer Engineering Faculty Publications

Web services use server-side input sanitization to guard against harmful input. Some web services publish their sanitization logic to make their client interface more usable, e.g., allowing clients to debug invalid requests locally. However, this usability practice poses a security risk. Specifically, services may share the regexes they use to sanitize input strings — and regex-based denial of service (ReDoS) is an emerging threat. Although prominent service outages caused by ReDoS have spurred interest in this topic, we know little about the degree to which live web services are vulnerable to ReDoS.

In this paper, we conduct the first black-box …

Discrepancies Among Pre-Trained Deep Neural Networks: A New Threat To Model Zoo Reliability, Diego Montes, Pongpatapee Peerapatanapokin, Jeff Schultz, Chengjun Guo, Wenxin Jiang, James C. Davis

Department of Electrical and Computer Engineering Faculty Publications

Training deep neural networks (DNNs) takes significant time and resources. A practice for expedited deployment is to use pre-trained deep neural networks (PTNNs), often from model zoos.collections of PTNNs; yet, the reliability of model zoos remains unexamined. In the absence of an industry standard for the implementation and performance of PTNNs, engineers cannot confidently incorporate them into production systems. As a first step, discovering potential discrepancies between PTNNs across model zoos would reveal a threat to model zoo reliability. Prior works indicated existing variances in deep learning systems in terms of accuracy. However, broader measures of reliability for PTNNs from …

A Pressure And Temperature Cycling Test Stand With Hot-Gas Bypass Control For Evaluation Of Adhesive Joints In Hvac&R Applications, Haotian Liu, Justin Weibel, Patrick Geoghegan, Eckhard A. Groll

CTRC Research Publications

The formation of joints is critical to the long-term reliability with leak-free operation of heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems. Leakages commonly occur due to fatigue failure developing in joined materials from continuous pressure and temperature cycling with mechanical vibration and refrigerant under pressure inside the system. In particular, rapid pressure and temperature changes happen frequently (e.g., multiple times per day) when the system is switched on and off. Therefore, it is important to have an automatically controlled fast- 2 response pressure and temperature cycling (PTC) test stand available to test the performance of refrigeration joints to evaluate …

Suction Valve Design Optimization To Improve Reliability, Sehnaz Ektas, Haluk Arda Avci

International Compressor Engineering Conference

No abstract provided.

Semi-Empirical Scroll Compressor Model With Optional Vapor-Injection, Jan Christ, Fabian Schmid, Konstantinos Stergiaropoulos, Stefan Bertsch

International Compressor Engineering Conference

No abstract provided.

The Optimisation Of The Inlet Diameter And The Filter Of The Muffler Of The Hermetic Compressors, Sarper Maraşlı, Semih Gürel, İsmail Yeşilaydın

International Compressor Engineering Conference

No abstract provided.

Study Of High-Performance Engineering Polymers Applied In Reciprocating Hermetic Refrigeration Compressors – Part 2: Extension To New Components & Experimental Validation, Qasim Shaikh, Patrick Kunc, Roger Nelson, Laurent Hazard, Philippe Martin, Celso Kenzo Takemori, Edmar Baars, Luis Miguel Valdes Lopez, Gustavo Rafael Bernardes

International Compressor Engineering Conference

No abstract provided.

Ils 490: Diplomacy Lab: Strategies For Identifying Mis/Disinformation Course Syllabus, Bethany S. Mcgowan, Matthew Hannah

Libraries Faculty and Staff Creative Materials

No abstract provided.

Put Your Money Where Your Mouth Is: A Values-Based Evaluation Tool For Collections Decisions, Heather A. Howard, Dave Zwicky, Danielle Walker

Libraries Faculty and Staff Scholarship and Research

As libraries and communities consider institutional values and ethical standards, there is a need to scrutinize how those values and standards connect with collections decisions. An existing body of literature about the contents of the collections exists, with respect to issues like decolonization and open access, but little about the business relationships libraries maintain in order to acquire these collections. In this paper, librarians from Purdue University take a critical approach to identifying the values of their institution at multiple levels, including a newly released Libraries strategic plan, to create a values-based evaluation tool for future collection assessment.

Experimental Investigation Of R1336mzz(E) In A High-Temperature Heat Pump, Cordin Arpagaus, Sidharth Paranjape, Leon P. M. Brendel, Luke D. Simoni, Konstantinos Kontomaris, Stefan S. Bertsch

International Refrigeration and Air Conditioning Conference

No abstract provided.

Contents, William S. Walker Iii, Lynn A. Bryan Ph. D., S. Selcen Guzey, Elizabeth Suazo-Flores

Indiana STEM Education Conference

No abstract provided.

How To Measure And Evaluate Refrigerant Cycles – In A Representative, Reproducible Manner? An Experimental Case Study For Water-To-Water Heat Pumps, Stephan Gobel, Christian Vering, Dirk Müller, André Wachau

International Refrigeration and Air Conditioning Conference

No abstract provided.

Air Conditioning In Public Transport Vehicles. Numerical Simulation Of Contaminants Transport And Infection Probability., Jordi Vera, Eugenio Schillaci, Joaquim Rigola, Marc Arolas, Oriol Del Rivero

International Refrigeration and Air Conditioning Conference

No abstract provided.

The Two-Phase Flow Boiling Heat Transfer Coefficient Of R448a Inside Multiport Mini-Channel Tube, Hoang Ngoc Hieu, Nurlaily Agustiarini, Jong-Taek Oh

International Refrigeration and Air Conditioning Conference

No abstract provided.

Carnot Analysis Of Heat Pump Drying: Ideal Efficiency And Dry Time, Kyle Gluesenkamp, Viral Patel

International Refrigeration and Air Conditioning Conference

No abstract provided.

Critical Analysis Of Replacements For R410a In Heat Pump Applications, Zhenning Li, Samuel Fortunato Yana Motta, Bo Shen, Brian Fricke, Hanlong Wan

International Refrigeration and Air Conditioning Conference

No abstract provided.

Experimental Results Of Density Controlled Phase Change Material Capsules For Increased First Hour Rating For Heat Pump Water Heaters, Joseph Rendall, Kashif Nawaz, Will Asher, Jamieson Brechtl, Ahmed Elatar, Kai Li, Cheng-Min Yang, Jian Sun, Tony Gehl

International Refrigeration and Air Conditioning Conference

No abstract provided.

Gravity Dependence Quantifiers For Vapor Compression Cycles Subjected To Inclination Testing And Parabolic Flights, Leon P. M. Brendel, Stephen L. Caskey, James E. Braun, Eckhard A. Groll

International Refrigeration and Air Conditioning Conference

No abstract provided.