The Role Of Farmer Heterogeneity In Nutrient Management: A Farm-Level Analysis, Hua Wang, Naveen Adusumilli, Daniel Fromme, Keith Shannon

Journal of Applied Farm Economics

Understanding farmer heterogeneity regarding nutrient management decisions is crucial for the success of any nonpoint source pollution prevention programs. Data from a farm- level experiment of cover crops in corn production were used in the Stochastic Efficiency with Respect to a Function framework to examine preference for nitrogen strategies over a range of risk aversion levels. We show the highest net return and certainty equivalent to the consideration of N supplied by cover crops. The results provide insights into policy discussions about the level of conservation incentives and plans that offer solutions to mitigate nonpoint source pollution.

“Oh, You Shouldn’T Have!” Understanding Key Factors Impacting Cut Flowers Gifting Preferences In Germany, Meike Rombach, David L. Dean, Nicole Olynk Widmar, Vera Bitsch

Department of Agricultural Economics Faculty Publications

Cut flower gifting preferences are relatively unexplored in Germany. This study proposes a model that investigates the impact of attitudinal, experiential, and socio-demographic factors on the cut flower gifting preferences of German consumers. For this purpose, an online survey with a representative sample of 978 German residents was conducted. Partial least squares structural equation modelling shows that active and passive engagement with plants and nature positively impact cut flower giving preferences through cut flower knowledge, cut flower fondness, and perceived versatility of cut flowers. For German women and men, the largest driver of cut flower giving preferences is the versatility …

Questions To Measure Enjoyment Of And Satisfaction With Physical Activity: Are They Appropriate For Use In An Older Population?, Mary Katherine Huffman, Sharon L. Christ, Kenneth F. Ferraro, David B. Klenosky, Kristine Marceau, Steve Amireault

Purdue University Libraries Open Access Publishing Fund

Background and Objectives

Enjoyment of and satisfaction with physical activity have been proposed as two actionable mechanisms to promote sustained engagement in physical activity. An accurate understanding of how, why, and for whom these two mechanisms work (or not) in response to a particular intervention strategy is contingent on having suitable measures for the population of interest. This study aims to determine whether the Physical Activity Enjoyment Scale-8 and a novel approach to the measurement of satisfaction with physical activity are suitable for use among older adults (Mage = 66.25 years; range = 55–91 years).

Research Design and Methods

Participants …

Teaching With Data In The Social Sciences: The Purdue Report, Jane Yatcilla, Clarence Maybee, Bethany Mcgowan, Gang Shao, D Trevor Burrows

Libraries Reports

Purdue University Libraries participated in a multi-institution study about how instructors teach with data in social sciences courses. Thirteen semi-structured interviews were conducted with social sciences faculty who teach undergraduate students to use data, addressing questions about how faculty connect students to data; how students work with data; what types of support faculty have received that informs their teaching with data. Four broad themes emerged from qualitative coding of the interview transcripts: an array of purposes and practices for teaching about data; instructors' experiences, needs, and perspectives; managing wide-ranging student confidence and ability; technical concerns when teaching with data. The …

Enable The People To Say, "Amazing: We Did It, All By Ourselves!", Yeomin Yoon

KAUPA Letters

No abstract provided.

Recent Progress In Superabsorbent Polymers For Concrete, Christof Schröfl, Kendra Erk, Wanwipa Siriwatwechakul, Mateusz Wyrzykowski, Didier Snoeck

School of Materials Engineering Faculty Publications

Scientific interest on superabsorbent polymers (SAPs) in conjunction with cement-based building materials has widened from mostly engineering aspects towards polymer physico-chemical topics over the past years. Here, we focus on the relationships between absorptivity in terms of absorption/desorption kinetics and retention of the absorbed liquid and the polymer physico-chemical principles. Based on such understanding, use and effects of SAPs in concrete are outlined and explained mechanistically. They comprise modifying rheology, internal curing to mitigate plastic and autogenous shrinkage, self-sealing and self-healing of cracks, and improvement of freezing-and-thawing durability. Recent topics such as reduction of fire spalling and enhanced growth of …

Tips To Professors For Managing Money, Semoon Chang

KAUPA Letters

No abstract provided.

Occurrence And Probabilistic Health Risk Assessment (Pra) Of Dissolved Metals In Surface Water Sources In Southern Peru, Alexander Ccanccapa-Cartagena, Betty Paredes, Corina Vera, Francisco D. Chavez-Gonzales, Elizabeth Joy Olson, Lisa Welp, Nadezhda N. Zyaykina, Timothy R. Filley, David M. Warsinger, Chad T. Jafvert

School of Mechanical Engineering Faculty Publications

Often, metal and metalloid ions are present in water at concentrations that seriously affect human health; understanding their occurrence is critical, especially in regions such as Peru, where natural volcanic activity and anthropogenic activity have made them more prevalent in local waterbodies. In this study, river, lake, aquifer, and irrigation water samples, collected from the Chili-Quilca, Camana-Majes, Colca-Chivay-Siguas, Oco˜na, Urubamba-Vilcanota, and Titicaca river basins in Southern Peru, were analyzed for transition metals, other metals, metalloids, and other inorganic water constituents. Special emphasis was placed on metals and metalloids regulated by Peruvian Water Quality Standards and those categorized as of “primary …

Nanofluids Improve Energy Efficiency Of Membrane Distillation, Harsharaj B. Parmar, Hamid Fattahi Juybari, Yashwant S. Yogi, Sina Nejati, Ryan M. Jacob, Prashant S. Menon, David M. Warsinger

School of Mechanical Engineering Faculty Publications

Thermal desalination of high salinity water resources is crucial for increasing freshwater supply, but efficiency enhancements are badly needed. Nanomaterial enhancements offer enormous potential for improving promising technologies like membrane distillation (MD). However, while many approaches have been tried, such as nanoparticle solar absorbers or nanomaterial membranes, there have not been studies to directly enhance the fluid properties in MD; via nanofluids. In this work, we examine nanofluids for gap-based MD systems, including the role of nanoscale physics and system-level energy efficiency enhancements. Our model includes the dominant micro-mixing from Brownian motion in fine particle nanofluids (copper oxide) and the …

내마음의 韓詩: 愛, Young B. Choi

KAUPA Letters

No abstract provided.

Understanding Informed Design Through Trade-Off Decisions With An Empirically-Based Protocol For Students And Design Educators, Molly H. Goldstein, Robin S. Adams, Senay Purzer

Journal of Pre-College Engineering Education Research (J-PEER)

Trade-off decisions, which necessitate striking a balance between two or more desirable but competing features, are a crucial part of design practice. However, they are known to be difficult for student designers to make. While designers, educators, and researchers have numerous methods to assess the quality of design artifacts, these methods are not necessarily easy to use, nor do they indicate design competency. Moreover, they are not grounded in a definition of engineering design. The objectives of this study were twofold. First, we developed a protocol to depict design artifact quality through the lens of design trade-off decisions. We aimed …

Enhancing Engineering Identity Among Boys Of Color, Jerrod Henderson, Virginia Snodgrass Rangel, James Holly Jr, Rick Greer, Mariam Manuel

Journal of Pre-College Engineering Education Research (J-PEER)

Black and Brown men continue to be underrepresented in engineering. One explanation for the dearth of Black and Latino men in engineering is that engineering (and STEM) identity often is not inclusive of People of Color. As a result, Black and Brown boys may be less likely to become interested in STEM subjects. The purpose of this study, then, was to investigate how the components of one afterschool engineering program tap into engineering identity formation among fourth- and fifth-grade Black and Brown boys. Leveraging research on the STEM and engineering identity, we argue that the program and its key components …

Rheology Of Enzyme Liquefied Corn Stover Slurries: The Effect Of Solids Concentration On Yielding And Flow Behavior, Ryan Szeto, Jonathan C. Overton, Antonio Freitas Dos Santos, Clark Eby, Nathan S. Mosier, Eduardo Ximenes, Michael R. Ladisch, Kendra Erk

School of Materials Engineering Faculty Publications

The measurement of yield stress and shear thinning flow behavior of slurries formed from unpretreated corn stover at solids loadings of 100–300 g/L provides a key metric for the ability to move, pump, and mix this lignocellulosic slurry, particularly since corn stover slurries represent a major potential feedstock for biorefineries. This study compared static yield stress values and flow hysteresis of corn stover slurries of 100, 150, 200, 250, and 300 g/L, after these slurries were formed by adding pellets to a cellulase enzyme solution (Celluclast 1.5 L) in a fed-batch manner. A rotational rheometer was used to quantitate relative …

Biden Administration U.S. Space Force Policy Literature, Bert Chapman

Libraries Faculty and Staff Presentations

Provides details on U.S. Space Force policy literature produced by the Biden Administration during its first eight months. Includes announcements that the Biden Administration will continue this new armed services branch begun during the Trump Administration. Features congressional testimony of Biden Administration officials such as Secretary of Defense Lloyd Wilson and Air Force Space Command leader General James Dickinson, the text of Space Force's 2021 Digital Force Vision document, congressionally approved FY 2022 space force budget figures, congressional committee comments and report requirements contained in emerging defense spending legislation, the emergence of collaboration between Space Force and universities such as …

Considerations For Recommending Service Dogs Versus Emotional Support Animals For Veterans With Post-Traumatic Stress Disorder, Macy Porter, Melissa Y. Winkle, Ellen Herlache-Pretzer

People and Animals: The International Journal of Research and Practice

Background: Health care providers must understand factors that may guide the decision-making process for determining whether a veteran with post-traumatic stress disorder (PTSD) is appropriate for a service dog (SD) versus an emotional support animal (ESA), and assist SD training organizations in determining trained tasks that are suitable for the veteran’s needs.

Purpose: This study explored the perspectives of SD training organizations and factors for human health care providers to consider before recommending a veteran with PTSD for a SD versus an ESA. The researchers identified information that providers should give organizations to guide the SD training and placement process. …

Demographic Characteristics Of Individuals Who Abuse Animals: A Systematic Review, Lisa Emmett, Nina Kasacek, Birgit Ursula Stetina

People and Animals: The International Journal of Research and Practice

The purpose of the following review is to evaluate current literature on animal abuse including animal hoarding and zoophilia to identify demographic characteristics of adults who abuse animals. The review was conducted by using the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) Checklist 2009 (Moher et al., 2010). As the body of this research is still limited there were no restrictions regarding the level of evidence of studies made. A total of 40 studies met the selection criteria and were included in the review. The present review’s main findings suggest that animal hoarders are mostly female and between …

Human- Animal Interaction To Support Well- Being At University: Experiences Of Undergraduate Students In The Uk, Aliya Khalid, Anne Rogers, Emily Vicary, Helen Brooks

People and Animals: The International Journal of Research and Practice

In the context of increasing concerns about student mental health and the therapeutic value of companion animals for mental health, there is limited understanding of the potential contribution of human- animal interaction in relation to undergraduate well- being. This study aimed to develop an in- depth understanding of the meaning and well- being roles attributed to human- animal interactions by undergraduate students in the UK. Using a qualitative research design, semistructured interviews were conducted with 60 students aged be-tween 18 to 23 years at a UK university of whom 39 implicated the role of companion animals in their well- being …

Can The Visits Of Dogs (Canis Lupus Familiaris) Influence The Mental Health (Anxiety And Depression) Of Male Aging Patients Institutionalized With Dementia In Health Care Units? A Pilot Study Of Madeira Island, Portugal, S. Vasconcelos, J. Azevedo, C. Casanova, H. Jardim, D. Neto, S. Jardim, C. Viegas

People and Animals: The International Journal of Research and Practice

Despite the fact that in the last decades, several mental health studies have shown that companion animals contribute to psychological and social well- being in humans (e.g., positive impacts have been observed in the elderly medicated for chronic diseases such as anxiety, dementia, and depression), bonds between humans and other animals continue to be under-estimated. The aim of this study is to assess the impact of an animal’s visits (twice a week, N = 30) in depression and anxiety levels of an institutionalized male population diagnosed with dementia. While some of these patients are being partially medicated with antidepressants and/or …

Embryonic And Neonatal Mouse Cochleae Are Susceptible To Zika Virus Infection, Vidhya Munnamalai, Nabilah H. Sammudin, Caryl A. Young, Ankita Thawani, Richard J. Kuhn, Donna M. Fekete

Department of Biological Sciences Faculty Publications

Congenital Zika Syndrome (CZS) is caused by vertical transmission of Zika virus (ZIKV) to the gestating human fetus. A subset of CZS microcephalic infants present with reduced otoacoustic emissions; this test screens for hearing loss originating in the cochlea. This observation leads to the question of whether mammalian cochlear tissues are susceptible to infection by ZIKV during development. To address this question using a mouse model, the sensory cochlea was explanted at proliferative, newly post-mitotic or maturing stages. ZIKV was added for the first 24 h and organs cultured for up to 6 days to allow for cell differentiation. Results …

Evaluation Of 3,3′-Triazolyl Biisoquinoline N,N′-Dioxide Catalysts For Asymmetric Hydrosilylation Of Hydrazones With Trichlorosilane, Shiyu Sun, Changgong Xu, Jamielyn Jarvis, Phillip Nader, Brandon Naumann, Abigail Soliven, Roberto Peverati, Noriko Takenaka

Department of Chemistry Faculty Publications

A new class of axial-chiral biisoquinoline N,N′-dioxides was evaluated as catalysts for the enantioselective hydrosilylation of acyl hydrazones with trichlorosilane. While these catalysts provided poor to moderate reactivity and enantioselectivity, this study represents the first example of the organocatalytic asymmetric reduction of acyl hydrazones. In addition, the structures and energies of two possible diastereomeric catalyst–trichlorosilane complexes (2a–HSiCl₃) were analyzed using density functional theory calculations.

Does The Covid-19 Pandemic Change Consumers’ Food Consumption And Willingness-To-Pay? The Case Of China, Wei Yue, Na Liu, Qiujie Zheng, H Holly Wang

Department of Agricultural Economics Faculty Publications

Since COVID-19 was first detected in China in 2019, governments around the world have imposed strict measures to curb the spread of the coronavirus, which substantially impacted people’s life. Consumers’ food consumption behavior has also changed accordingly with reduced grocery shopping frequency, replaced in-person grocery shopping with online shopping, and increased valuation on food. In this paper, we aim to investigate the change in Chinese consumers’ food consumption and their willingness to pay (WTP) for vegetables and meat, using a dataset with 1206 online samples collected between February and March 2020. Consumers’ WTP for vegetables and meat is estimated using …

Bacterial Biofilms And Their Implications In Pathogenesis And Food Safety, Xingjian Bai, Cindy H. Nakatsu, Arun K. Bhunia

Department of Food Science Faculty Publications

Biofilm formation is an integral part of the microbial life cycle in nature. In food processing environments, bacterial transmissions occur primarily through raw or undercooked foods and by cross-contamination during unsanitary food preparation practices. Foodborne pathogens form biofilms as a survival strategy in various unfavorable environments, which also become a frequent source of recurrent contamination and outbreaks of foodborne illness. Instead of focusing on bacterial biofilm formation and their pathogenicity individually, this review discusses on a molecular level how these two physiological processes are connected in several common foodborne pathogens such as Listeria monocytogenes, Staphylococcus aureus, Salmonella enterica and Escherichia …

Evaluation Of A Combined Mhe-Nmpc Approach To Handle Plant-Model Mismatch In A Rotary Tablet Press, Yan-Shu Huang, M Ziyan Sheriff, Sunidhi Bachawala, Marcial Gonzalez, Zoltan K. Nagy, Gintaras V. Reklaitis

Department of Chemistry Faculty Publications

The transition from batch to continuous processes in the pharmaceutical industry has been driven by the potential improvement in process controllability, product quality homogeneity, and reduction of material inventory. A quality-by-control (QbC) approach has been implemented in a variety of pharmaceutical product manufacturing modalities to increase product quality through a three-level hierarchical control structure. In the implementation of the QbC approach it is common practice to simplify control algorithms by utilizing linearized models with constant model parameters. Nonlinear model predictive control (NMPC) can effectively deliver control functionality for highly sensitive variations and nonlinear multiple-input-multiple-output (MIMO) systems, which is essential for …

Quantitative Proteomics And Phosphoproteomics Reveal Tnf-Α-Mediated Protein Functions In Hepatocytes, Rodrigo Mohallem, Uma K. Aryal

Department of Veterinary Clinical Sciences Faculty Publications

Increased secretion of proinflammatory cytokines, such as tumor necrosis factor-alpha (TNFα), is often associated with adipose tissue dysregulation, which often accompanies obesity. High levels of TNFα have been linked to the development of insulin resistance in several tissues and organs, including skeletal muscle and the liver. In this study, we examined the complex regulatory roles of TNFα in murine hepatocytes utilizing a combination of global proteomic and phosphoproteomic analyses. Our results show that TNFα promotes extensive changes not only of protein levels, but also the dynamics of their downstream phosphorylation signaling. We provide evidence that TNFα induces DNA replication and …

Prioritizing Roadway Pavement Marking Maintenance Using Lane Keep Assist Sensor Data, Justin Mahlberg, Rahul Suryakant Sakhare, Howell Li, Jijo Mathew, Darcy M. Bullock, Gopi C. Surnilla

Lyles School of Civil Engineering Faculty Publications

There are over four million miles of roads in the United States, and the prioritization of locations to perform maintenance activities typically relies on human inspection or semi-automated dedicated vehicles. Pavement markings are used to delineate the boundaries of the lane the vehicle is driving within. These markings are also used by original equipment manufacturers (OEM) for implementing advanced safety features such as lane keep assist (LKA) and eventually autonomous operation. However, pavement markings deteriorate over time due to the fact of weather and wear from tires and snowplow operations. Furthermore, their performance varies depending upon lighting (day/night) as well …

Competitive Advantage Of Geosmithia Morbida In Low-Moisture Wood May Explain Historical Outbreaks Of Thousand Cankers Disease And Predict The Future Fate Of Juglans Nigra Within Its Native Range, Geoffrey M. Williams, Matthew D. Ginzel

Purdue University Libraries Open Access Publishing Fund

Bark beetles vector symbiotic fungi and the success of these mutualisms may be limited by competition from other microbes. The outcome of fungal competition is strongly influenced by the physical and chemical conditions of the wood they inhabit. These conditions are in turn subject to climatic variation. In particular, wood moisture content (MC) influences fungal competition and, therefore, could help determine environmental suitability for thousand cankers disease (TCD) caused by Geosmithia morbida and its vector Pityophthorus juglandis. We conducted competition experiments in Juglans nigra wood that was naturally or artificially colonized by G. morbida and other fungi over a range …

Systemic Copper Disorders Influence The Olfactory Function In Adult Rats: Roles Of Altered Adult Neurogenesis And Neurochemical Imbalance, Sherleen Xue-Fu Adamson, Wei Zheng, Zeynep Sena Agim, Sarah Du, Sheila Fleming, Jason Cannon

School of Health Sciences Faculty Publications

Disrupted systemic copper (Cu) homeostasis underlies neurodegenerative diseases with early symptoms including olfactory dysfunction. This study investigated the impact of Cu dyshomeostasis on olfactory function, adult neurogenesis, and neurochemical balance. Models of Cu deficiency (CuD) and Cu overload (CuO) were established by feeding adult rats with Cu-restricted diets plus ip. injection of a Cu chelator (ammonium tetrathiomolybdate) and excess Cu, respectively. CuD reduced Cu levels in the olfactory bulb (OB), subventricular zone (SVZ), rostral migratory stream (RMS), and striatum, while CuO increased Cu levels in these areas. The buried pellet test revealed both CuD and CuO prolonged the latency to …

Comparative Safety Analysis Of Accelerator Driven Subcritical Systems And Critical Nuclear Energy Systems, Run Luo, Shripad Revankar, Fuyu Zhao

School of Nuclear Engineering Faculty Publications

The accelerator driven subcritical system (ADS) has been chosen as one of the best candidates for Generation IV nuclear energy systems which could not only produce clean energy but also incinerate nuclear waste. The transient characteristics and operation principles of ADS are significantly different from those of the critical nuclear energy system (CNES). In this work, the safety characteristics of ADS are analyzed and compared with CNES by a developed neutronics and thermal-hydraulics coupled code named ARTAP. Three typical accidents are carried out in both ADS and CNES, including reactivity insertion, loss of flow, and loss of heat sink. The …

Fe Simulation Of Split In Fundamental Air-Cavity Mode Of Loaded Tires: Comparison With Empirical Results, Won Hong Choi, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

Tire/road noise has become a significant issue in the automotive industry, especially for electric vehicles. Among the various tire/road noise sources, the air cavity mode can amplify the forces transmitted from the tire to the suspension system causing noticeable cabin noise near 200 Hz. Furthermore, when the tire is deformed by loading, the fundamental air-cavity mode separates into two acoustic modes, a fore-aft mode and vertical mode due to the break in geometrical symmetry. This is important because the two components of the split mode can increase force levels at the hub by interacting with neighboring structural modes, thus resulting …

Introduction To Prefabrication And Automation In Construction, Luciana Debs, Jiansong Zhang, Yunfeng Chen

Bowen School of Construction Open Educational Resources

New developments and recent advances in construction methods have the potential to change the future of the architecture, engineering and construction industry. Prefabrication, along with modular construction, provides a safe and controlled environment for the production of building construction elements and raises the need for improved collaboration and coordination from design to manufacturing and from transportation to final assembly. Prefabrication also provides relief from the skilled construction labor shortage while opening up new opportunities for mass customization within the building industry. Prefabrication and modular construction automation are emerging expansion routes for the construction industry. In addition, integral to developing the …