Entire DC Network | Open Access Articles | Digital Commons Network™

Collecting To The Core — Our Common Future, Carla Heister, Anne Doherty

Against the Grain

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Optimizing Library Services — Cloud Computing For Higher Education Institutions: A Feasibility Study Of The Adoption Of Iaas In The Computing And Library Services Of A U.K. University, Lindsay Wertman, Caroline J. Campbell, Alexandros Chrysikos

Against the Grain

No abstract provided.

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National Conferences, Jane A. Hamblin

Supplementary content for Mortar Board: A Century of Scholars, Chosen for Leadership, United to Serve

No abstract provided.

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The Scholarly Publishing Scene — Publishing Memories, Myer Kutz

Against the Grain

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#Chsconf2018 Through The Lens Of Social Media, Carol Appollo Kennedy

Against the Grain

No abstract provided.

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Stop, Look, Listen — Oa Books Funding: The Next Phase, Sven Fund

Against the Grain

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Straight Talk — Springer Nature Cancels €3.2 Billion Ipo At The Last Minute, Dan Tonkery

Against the Grain

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Letters To The Editor, Katina Strauch

Against the Grain

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Squirreling Away: Managing Information Resources &Libraries — Supply Chains Are Complicated, But Critical, Corey Seeman

Against the Grain

No abstract provided.

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Considering Games And Gamification In Libraries & Associated Entities — The “G” Word, Jared Alexander Seay

Against the Grain

No abstract provided.

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Internet Of Underground Things In Precision Agriculture: Architecture And Technology Aspects, Abdul Salam, Mehmet C. Vuran, Rigoberto Wong, Suat Irmak

Computer Information Technology Faculty Publications

The projected increases in World population and need for food have recently motivated adoption of information technology solutions in crop fields within precision agriculture approaches. Internet Of Underground Things (IOUT), which consists of sensors and communication devices, partly or completely buried underground for real-time soil sensing and monitoring, emerge from this need. This new paradigm facilitates seamless integration of underground sensors, machinery, and irrigation systems with the complex social network of growers, agronomists, crop consultants, and advisors. In this paper, state-of-the-art communication architectures are reviewed, and underlying sensing technology and communication mechanisms for IOUT are presented. Moreover, recent advances in …

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Soft Microreactors For The Deposition Of Conductive Metallic Traces On Planar, Embossed, And Curved Surfaces, Abhiteja Konda, Advaith Rau, Michael A. Stoller, Jay M. Taylor, Abdul Salam, Gabriel A. Pribil, Christos Argyropoulos, Stephen A. Morin

Computer Information Technology Faculty Publications

Advanced manufacturing strategies have enabled large‐scale, economical, and efficient production of electronic components that are an integral part of various consumer products ranging from simple toys to intricate computing systems; however, the circuitry for these components is (by and large) produced via top‐down lithography and is thus limited to planar surfaces. The present work demonstrates the use of reconfigurable soft microreactors for the patterned deposition of conductive copper traces on flat and embossed two‐dimensional (2D) substrates as well as nonplanar substrates made from different commodity plastics. Using localized, flow‐assisted, low‐temperature, electroless copper deposition, conductive metallic traces are fabricated, which, when …

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Muskmelon Variety Trial In Southwest Indiana ̶ 2017, Wenjing Guan, Dan Egel, Dennis Nowaskie, Alex Plummer

Purdue Fruit and Vegetable Research Reports

This is a compilation of 18 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

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Improving The Reliability Of A Domestic Refrigerator Compressor Subjected To Repetitive Loading, Seongwoo Woo, Dennis O'Neal

International Compressor Engineering Conference

As a reliability quantitative specification, parametric accelerated life testing was used to assess the reliability of a newly designed compressor of a commercial refrigerator subjected to repetitive stresses. A generalized life-stress failure model and new sample size equation with a new load concept were derived starting with the basic refrigeration cycle. The sample size equation with the acceleration factor also enabled the parametric accelerated life testing to quickly evaluate the expected lifetime. The design of this testing should help an engineer uncover the design parameters affecting reliability during the design process of the compressor system. Consequently, it should help companies …

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Numerical Study On The Internal Characteristics Of Single Screw Expanders Used In Organic Rankine Cycle Systems, Lili Shen, Wei Wang, Yu-Ting Wu, Biao Lei, Ruiping Zhi, Chongfang Ma

International Compressor Engineering Conference

Single screw expanders have been widely studied in middle-low temperature heat recovery power system of organic Rankine cycle, which is significant for the energy-conservation and environment-protection. However, internal irreversible loss including leakage, heat transfer and friction power loss has great influence on the performances of single screw expanders. Although some present researches of single screw expanders have been carried out, few can directly reflect the effect of internal irreversible loss on the performance of expanders. Therefore, it is necessary to research the internal characteristics of the single screw expanders. In this paper, a numerical study of a single screw expander …

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Dynamics Study Of The Hermetic Compressor, Simone Penazzo

International Compressor Engineering Conference

In this Paper a detailed study of dynamics of the hermetic compressor is shown. The key point of this study is the well-known issue of compressor reciprocating kinematic unbalancing which is the main cause of modern refrigerator structural vibrations and consequently acoustical performance. In this frame-work the main target of this work is the reduction and redistribution of compressor accelerations along “privileged” axes to reduce the aforementioned phenomena. Starting from the general treatment of Professor Sōdel, specific studies on reciprocating kinematic balancing, discharge pipe, suspension springs and crankcase dynamics are performed. In particular, a detailed model is developed to calculate …

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Numerical Analysis Of Friction Power And Wear Of Vane In Rotary Compressor, Zhong Yang, Hong Guo, Bo Jiang, Binsheng Zhu

International Compressor Engineering Conference

In this article, a numerical method was established to analyze the friction power and wear of vane in the rotary compressor. In this method, the time domain was divided into many steps, the physical process was simplified as an explicit model. At each delta time step, three sub models were calculated iteratively, the geometric model, the contact model and the friction model. Firstly, in the geometric model, geometric kinematics of vane and piston were obtained by calculating multi body dynamical equation. Secondly, in the contact model, Reynolds equation and elastic contact equation were solved as a coupled problem to get …

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Numerical Simulation Of Pump Oil For Rotary Compressor Under Different Crankshaft Structures, Wang Yanzhen, Chunhui Liu

International Compressor Engineering Conference

The oil lubrication system of the crankshaft pump is an essential part of the rotary compressor. In the crankshaft pump oil lubrication system, the crankshaft has two kinds of inner hole structure: straight through hole and horizontal hole. The direct through hole and the transverse hole are different not only in the processing mode and cost, but also on the oil quantity of the pump. In this paper, based on the CFD software the fluid field of whole compressor exhaust chamber under different speed is simulated, and the pressure pulsation curves of crankshaft through hole end and horizontal hole end …

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Noise Optimization For Rotary Compressor Base On Balance Of Crank-Shaft System Analysis, Xiaoqiang Huang, Hui Shen, Ke Wang, Xuechao Ding, Lijuan Tian

International Compressor Engineering Conference

The sound quality and noise level of the compressor are obviously affected by balance of the crank-shaft system. An intermittent abnormal noise problem on a customer air-conditioner was detected through the crank-shaft displacement test, it is caused by the radial and longitudinal unbalance of the crank-shaft system of the rotary compressor. The test shows that the abnormal noise develops with the radial and longitudinal run-out of the crank-shaft of the compressor, the forces of the crank-shaft system are studied by the mechanical model and the optimization design schemes are obtained to solve the noise problem.

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Three-Dimensional Cfd Simulation Of A Roots Blower For The Hydrogen Circulating Pump, Yian Zhang, Ying Zhao, Xueyuan Peng

International Compressor Engineering Conference

Fuel cell vehicle (FCV) is more advantageous compared to a gasoline-powered internal combustion engine based vehicle and is a new and popular way to solve the environmental problem. Hydrogen circulating pump is an essential assembly unit for the fuel cell, which is used in FCV. Roots blower is employed in this field. Hydrogen has a low molecular weight, which means it is easy to leak through the clearances and hard to preserve. It increases the difficulty of design and operation. In this paper, the performance parameters of a three-lobe roots blower were studied. A multi-scale model was used since the …

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Application Of Dynamic Centrifugal Compressor Model For Mechanical Vapor Recompression System Simulation, Le Wang, Guangbin Liu, Chuandong Xie, Jun Xiao, Chenyan Zhang

International Compressor Engineering Conference

In order to reducing energy costs and CO2 foot-print, mechanical vapor recompression system (MVR) is used for thermal separation processes such as evaporation and distillation are energy intensive instead of multiple-effect evaporation system. For medium and high capacities, centrifugal compressor (fan) is the most commonly used type for gas compression with a limited operational range and control of the compressors is crucial for safe and efficient operation. The model based on first principles is developed for dynamic performance, which is determined from the compressor geometry and not from the experimentally determined characteristic performance curves. Impeller losses are studied: incidence, skin …

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Evaluation Of Lubricant Properties And Refrigerant Interaction, Joseph Karnaz, Christopher Seeton

International Compressor Engineering Conference

Lubricant selection for compressors used in the HVAC&R industry is typically tied to the refrigerant and subsequent properties understood to be desirable for effective system operation. Over the years refrigerants have changed, and with each change there has been a need for the reevaluation of the interaction with lubricants. In some cases, the existing lubricants can be utilized, however, in others, a there has been the need for new lubricants to be developed. Unfortunately, engineers have typically not challenged what constitutes good and have proceeded with outdated values for “good” or “desirable” properties of the lubricant-refrigerant mixture. Or, in some …

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Unsteady Numerical Simulation Of Scroll Expander Based On Cfd, Bin Peng, Li Yaohong, Shengxian Zhao

International Compressor Engineering Conference

As a key component of organic Rankine cycle system(ORC), the performance analysis of the scroll expander is critical for the whole system, and the force analysis of the orbiting scroll plays an important role in the output performance of the expander. In this study, CFD based 3D unsteady flow numerical simulation is performed on scroll expander, the flow characteristics, mechanical properties, output torque and power of the R134a scroll expander under different speed are analyzed in detail with dynamic mesh technology. The analysis shows that the inlet mass flow rate increases with the raise of shaft speed, the output torque …

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Noise And Cycle Performance Of A New Damping Valve For Compressor, Bo Huang, Hao Yuan

International Compressor Engineering Conference

A new design of damping valve which contain two steel valve and one piece of silica gel is proposed in this paper. This new structure is considered effective in the valve noise control especially in the mid-low speed which can lead the flutter response of valve. 6 case damping valves of different height are assembled in compressors. Noise and cycle performance experiment are carried out with the same working condition cases. One optimal damping valve is selected and it's sound pressure level of compressor is gotten about 2dB improvement compare with the mass one in the mid-low speed which contain …

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Igniting Self-Directed Learning And Higher Level Workforce Competencies In An Aviation Curriculum, Timothy D. Ropp

IMPACT Presentations

Discusses the underlying concepts and pedagogies informing an IMPACT redesign course in Aviation, focused on developing workplace competencies and students' self-directed learning.

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An Integrated Assessment Of The Potential Impacts Of Climate Change On Indiana Forests, Richard Phillips, Leslie Brandt, P. David Polly, Patrick A. Zollner, Michael Saunders, Keith Clay, Louis Iverson, Songlin Fei

Forest Publications

Forests provide myriad ecosystem services, many of which are vital to local and regional economies. Consequently, there is a need to better understand how predicted changes in climate will impact forests dynamics and the implications of such changes for society as a whole. Here we focus on the impacts of climate change on Indiana forests, which are representative of many secondary growth broadleaved forests in the greater Midwest region in terms of their land use history and current composition. We find that predicted changes in climate for the state – warmer and wetter winters/springs and hotter and potentially drier summers …

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Are The Adverse Human Effects Of Air Pollution Underestimated In The Literature? Implications For Science, Medicine And Public Policy, Stephen Jay

Health Supplemental Files

Researchers have not addressed the question “Are the adverse human effects of air pollution underestimated in the literature?” and to date we lack an answer to it. This scan is a non-scientific review of diseases causally linked to air pollution and reported infrequently in the peer reviewed literature. I think a prospective study of the true estimate of mortality and morbidity and harm of air pollution would confirm current statistics upon which policy decisions are based are underestimated.

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Implications Of Climate Change For Managing Urban Green Infrastructure In Indiana, Heather Reynolds, Leslie Brandt, Burnell C. Fischer Dr, And Clinical Professor, Brady Hardiman, Donovan Moxley, Eric Sandweiss, James Speer, Songlin Fei

Urban Green Spaces Publications

Urban areas around the world are increasingly investing in networks of urban forests, gardens, and other forms of green infrastructure for its many benefits, including enhanced livability, sustainability, and climate change mitigation and adaptation. Proactive planning for climate change requires anticipating potential climate change impacts to green infrastructure and adjusting management strategies accordingly. We apply climate change projections for Indiana to assess the possible impacts of climate change on common forms of urban green infrastructure, and identify management implications. Projected changes in Indiana’s temperature and precipitation could pose numerous management challenges for managing urban green infrastructure, including water stress; pests, …

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Hoosiers’ Health In A Changing Climate: A Report From The Indiana Climate Change Impacts Assessment, Gabriel Filippelli, Melissa Widhalm, Rose Filley, Karen Comer, Gebisa Ejeta, William Field, Jennifer L. Freeman, Joe Gibson, Stephen Jay, Daniel Johnson, Max Jacobo Moreno-Madriñán, Richard D. Mattes, Igor Ogashawara, Jeremy Prather, Frank Rosenthal, Jeries Smirat, Yi Wang, Ellen Wells, Jeffrey Dukes

Health Reports

In the coming decades, Indiana’s changing climate will bring with it higher temperatures, longer heat waves, more extremely hot days and more frequent extreme storm events. Those changes will affect the health of Hoosiers in every part of the state. This report from the Indiana Climate Change Impacts Assessment (IN CCIA) describes historical and future climate-related health impacts that affect Hoosiers.

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Impacts Of Climate Change On The State Of Indiana: Ensemble Future Projections Based On Statistical Downscaling, Alan Hamlet, Kyuhyun Byun, Scott Robeson, Melissa Widhalm, Mike Baldwin

Climate Change Publications

Using an ensemble of 10 statistically downscaled global climate model (GCM) simulations, we project future climate change impacts on the state of Indiana (IN) for two scenarios of greenhouse-gas concentrations (a medium scenario--RCP4.5, and a high scenario--RCP 8.5) for three future time periods (2020s, 2050s, 2080s). Relative to a 1971-2000 baseline, the scenarios project substantial changes in temperature for IN, with a change in the annual ensemble mean temperature for the 2080s RCP8.5 scenario of about 5.6 °C (10.1 °F). Such changes also indicate major changes in extreme temperatures. For southern IN, the number of days with daily maximum temperatures …

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Full-Text Articles in Entire DC Network

Collecting To The Core — Our Common Future, Carla Heister, Anne Doherty

Against the Grain

Optimizing Library Services — Cloud Computing For Higher Education Institutions: A Feasibility Study Of The Adoption Of Iaas In The Computing And Library Services Of A U.K. University, Lindsay Wertman, Caroline J. Campbell, Alexandros Chrysikos

Against the Grain

National Conferences, Jane A. Hamblin

Supplementary content for Mortar Board: A Century of Scholars, Chosen for Leadership, United to Serve

The Scholarly Publishing Scene — Publishing Memories, Myer Kutz

Against the Grain

#Chsconf2018 Through The Lens Of Social Media, Carol Appollo Kennedy

Against the Grain

Stop, Look, Listen — Oa Books Funding: The Next Phase, Sven Fund

Against the Grain

Straight Talk — Springer Nature Cancels €3.2 Billion Ipo At The Last Minute, Dan Tonkery

Against the Grain

Letters To The Editor, Katina Strauch

Against the Grain

Squirreling Away: Managing Information Resources &Libraries — Supply Chains Are Complicated, But Critical, Corey Seeman

Against the Grain

Considering Games And Gamification In Libraries & Associated Entities — The “G” Word, Jared Alexander Seay

Against the Grain

Internet Of Underground Things In Precision Agriculture: Architecture And Technology Aspects, Abdul Salam, Mehmet C. Vuran, Rigoberto Wong, Suat Irmak

Computer Information Technology Faculty Publications

Soft Microreactors For The Deposition Of Conductive Metallic Traces On Planar, Embossed, And Curved Surfaces, Abhiteja Konda, Advaith Rau, Michael A. Stoller, Jay M. Taylor, Abdul Salam, Gabriel A. Pribil, Christos Argyropoulos, Stephen A. Morin

Computer Information Technology Faculty Publications

Muskmelon Variety Trial In Southwest Indiana ̶ 2017, Wenjing Guan, Dan Egel, Dennis Nowaskie, Alex Plummer

Purdue Fruit and Vegetable Research Reports

Improving The Reliability Of A Domestic Refrigerator Compressor Subjected To Repetitive Loading, Seongwoo Woo, Dennis O'Neal

International Compressor Engineering Conference

Numerical Study On The Internal Characteristics Of Single Screw Expanders Used In Organic Rankine Cycle Systems, Lili Shen, Wei Wang, Yu-Ting Wu, Biao Lei, Ruiping Zhi, Chongfang Ma

International Compressor Engineering Conference

Dynamics Study Of The Hermetic Compressor, Simone Penazzo

International Compressor Engineering Conference

Numerical Analysis Of Friction Power And Wear Of Vane In Rotary Compressor, Zhong Yang, Hong Guo, Bo Jiang, Binsheng Zhu

International Compressor Engineering Conference

Numerical Simulation Of Pump Oil For Rotary Compressor Under Different Crankshaft Structures, Wang Yanzhen, Chunhui Liu

International Compressor Engineering Conference

Noise Optimization For Rotary Compressor Base On Balance Of Crank-Shaft System Analysis, Xiaoqiang Huang, Hui Shen, Ke Wang, Xuechao Ding, Lijuan Tian

International Compressor Engineering Conference

Three-Dimensional Cfd Simulation Of A Roots Blower For The Hydrogen Circulating Pump, Yian Zhang, Ying Zhao, Xueyuan Peng

International Compressor Engineering Conference

Application Of Dynamic Centrifugal Compressor Model For Mechanical Vapor Recompression System Simulation, Le Wang, Guangbin Liu, Chuandong Xie, Jun Xiao, Chenyan Zhang

International Compressor Engineering Conference

Evaluation Of Lubricant Properties And Refrigerant Interaction, Joseph Karnaz, Christopher Seeton

International Compressor Engineering Conference

Unsteady Numerical Simulation Of Scroll Expander Based On Cfd, Bin Peng, Li Yaohong, Shengxian Zhao

International Compressor Engineering Conference

Noise And Cycle Performance Of A New Damping Valve For Compressor, Bo Huang, Hao Yuan

International Compressor Engineering Conference

Igniting Self-Directed Learning And Higher Level Workforce Competencies In An Aviation Curriculum, Timothy D. Ropp

IMPACT Presentations

An Integrated Assessment Of The Potential Impacts Of Climate Change On Indiana Forests, Richard Phillips, Leslie Brandt, P. David Polly, Patrick A. Zollner, Michael Saunders, Keith Clay, Louis Iverson, Songlin Fei

Forest Publications

Are The Adverse Human Effects Of Air Pollution Underestimated In The Literature? Implications For Science, Medicine And Public Policy, Stephen Jay

Health Supplemental Files

Implications Of Climate Change For Managing Urban Green Infrastructure In Indiana, Heather Reynolds, Leslie Brandt, Burnell C. Fischer Dr, And Clinical Professor, Brady Hardiman, Donovan Moxley, Eric Sandweiss, James Speer, Songlin Fei

Urban Green Spaces Publications

Health Reports

Impacts Of Climate Change On The State Of Indiana: Ensemble Future Projections Based On Statistical Downscaling, Alan Hamlet, Kyuhyun Byun, Scott Robeson, Melissa Widhalm, Mike Baldwin

Climate Change Publications