Digital Commons Network^™

Everyone, Everywhere, Every Time, Clayton A. Copeland Phd

Faculty Publications

The University of South Carolina’s Knowledge School has a commitment. The commitment: Everyone. Everywhere. Every time. The “Knowledge School” is about empowerment. It is about accessing abilities in everyone. It is about using abilities to ensure knowledge creation. And it is about using abilities to ensure equity. This chapter defines a philosophy rooted in tenets of universal access and design. It then highlights several initiatives in teaching, research, and service that put the philosophy into action.

Effective Early Treatment Of Microcystis Exponential Growth And Microcystin Production With Hydrogen Peroxide And Hydroxyapatite, Ian Struewing, Nathan Sienkiewicz, Chiqian Zhang, Nicholas Dugan, Jingrang Lu

Faculty Publications

: Mitigating cyanotoxin production is essential to protecting aquatic ecosystems and public health. However, current harmful cyanobacterial bloom (HCB) control strategies have significant shortcomings. Because predicting HCBs is difficult, current HCB control strategies are employed when heavy HCBs have already occurred. Our pilot study developed an effective HCB prediction approach that is employed before exponential cyanobacterial growth and massive cyanotoxin pro‐ duction can occur. We used a quantitative polymerase chain reaction (qPCR) assay targeting the toxin‐encoding gene mcyA to signal the timing of treatment. When control measures were applied at an early growth stage or one week before the exponential …

Agnew, Abc, And Richard Nixon's War On Television, Dale L. Cressman Phd

Faculty Publications

Less than a year into the presidency of Richard Nixon, Vice President Spiro Agnew launched a series of attacks on television journalists, accusing them of being biased and having too much power to determine what news millions of Americans watched on their televisions. Because the government licensed and regulated their stations, the networks considered Agnew's statements, and other White House criticisms, to be threats. As the smallest, most vulnerable network, ABC found itself at a confluence of relationships with the administration: It employed both Nixon's favorite and least favorite anchors, as well as a highly placed executive who lent sympathy …

Evaluating A Technology-Mediated Hpv Vaccination Awareness Intervention: A Controlled, Quasi-Experimental, Mixed Methods Study, Heather M. Brandt, Beth Sundstrom, Courtney M. Monroe, Gabrielle Turner-Mcgrievy, Chelsea Larsen, Melissa Stansbury, Karen Magradey, Andrea Gibson, Delia Smith West

Faculty Publications

College-aged women and men are an important catch-up population for human papillomavirus (HPV) vaccination interventions. Limited research has explored technology-mediated HPV vaccination awareness interventions aimed at college students. The purpose was to evaluate a novel, technology-mediated, social media-based intervention to promote HPV vaccination among college students. A controlled, quasi-experimental, mixed methods study examined the feasibility of a technology-based intervention among two undergraduate classes ( = 58) at a public university in the southeastern United States of America. Classes were randomized to receive one of two cancer prevention programs (i.e., HPV vaccination (intervention) or healthy weight (control)). Both programs contained eight …

Information Uncertainty: A Correlate For Acute Stress Disorder During The Covid-19 Outbreak In China, Danhua Lin, Daniela B. Friedman Ph.D., Shan Qiao Ph.D., Cheuk Chi Tam, Xiaoyan Li, Xiaoming Li Ph.D.

Faculty Publications

Background: Individuals’ stress in responding to the current COVID-19 pandemic may be exacerbated by information uncertainty driven by inconsistent, unverified, and conflicting news from various sources. The current study aims to test if information uncertainty during the COVID-19 outbreak was related to acute stress disorder (ASD) over and above other psychosocial stressors.

Methods: An anonymous online survey was conducted with 7800 college students throughout China from January 31 through February 11, 2020. Existing scales were modified to measure ASD and six potential stressors including information uncertainty during the COVID-19 outbreak. Hierarchical regression analysis was conducted to assess the unique association …

Hypotensive And Antihypertensive Effects Of An Aqueous Extract From Guinep Fruit (Melicoccus Bijugatus Jacq) In Rats, Chukwuemeka R. Nwokocha, Alexia Gordon, Javier Palacios, Adrian Paredes, Fredi Cifuentes, Sheena Francis, Je Ann Watson, Rupika Delgoda, Magdalene Nwokocha, Ruby Alexander-Lindo, Rory Thompson, Donna Minott-Kates, Momoh A. Yakubu

Faculty Publications

Melicoccus bijugatus Jacq (Mb) has been reported to have cardiovascular modulatory effects. In this study, we evaluated the antihypertensive effects and mechanism of action of Mb on NG-Nitro-l-arginine Methyl Ester (l-NAME) and Deoxycorticosterone Acetate (DOCA) rat models. Aqueous extract of Mb fruit (100 mg/kg) was administered for 6 weeks to rats by gavage and blood pressure was recorded. Effects of the extract on vascular reactivity was evaluated using isolated organ baths, and tissues were collected for biochemical and histological analysis. The systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP) were significantly (P < 0.05) reduced with extract (100 mg/kg) administration and treatment compared to the hypertensive models. Mb (100 µg/mL) reduced the vascular contractility induced by phenylephrine (PE), and caused a dose-dependent relaxation of PE-induced contraction of aortic vascular rings. The vasorelaxation properties seemed to be endothelium dependent, as well as nitric oxide (NO) and guanylyl cyclase, but not prostaglandin dependent. Histomicrograph of transverse sections of the ventricles from the Mb group did not show abnormalities. The extract significantly (P < 0.05) reduced an l-NAME induced elevation of cardiac output and Creatine Kinase Muscle-Brain (CKMB), but had no significant impact on the activities of arylamine N-acetyltransferase. In conclusion, Mb significantly decreased blood pressure in hypertensive models. The extract possesses the ability to induce endothelium dependent vasodilation, which is dependent on guanylyl cyclase but not prostaglandins.

Proving Our Maternal And Scholarly Worth: A Collaborative Autoethnographic Textual And Visual Storying Of Motherscholar Identity Work During The Covid-19 Pandemic, Elizabeth Spradley, Sarah S. Leblanc, Heather Olson-Beal, Lauren Burrow, Chrissy Cross

Faculty Publications

Pivoting to remote work as female academics and to schooling our children from home as mothers in March 2020 marked a dramatic shift in how we enact our MotherScholar identities. This collaborative autoethnographic study employs a modification of interactive interviewing and photovoice to produce verbal and visual text of COVID-19 MotherScholar identity work for analysis. Thematic analysis results in themes of maternal interruptions, professional interruptions, maternal recognition, and professional recognition. Of note, our MotherScholar interactivity functioned as identity work as we sought and granted legitimacy to one another’s’ COVID-19 MotherScholar identities. Of particular concern to us is how institutions of …

Blackness As Fighting Words, Etienne C. Toussaint

Faculty Publications

The resurgence of worldwide protests by activists of the Movement for Black Lives (BLM) has ushered a global reckoning with the meaning of this generation’s rallying cry – “Black Lives Matter.” As citizens emblazon their streets with this expression in massive artistic murals, the Trump administration has responded with the militarized policing of non-violent public demonstrations, revealing not merely a disregard for public safety, but far worse, a concerted dismantling of protestors’ First Amendment rights. Nevertheless, BLM protests have persisted. Accordingly, this Essay considers the implications of this generation’s acclamation of Black humanity amidst the social tensions exposed during the …

Emotional Presence In Building An Online Learning Community Among Non-Traditional Graduate Students, Mei Jiang, Katie Koo

Faculty Publications

The Community of Inquiry (CoI) framework posits that a collaborative online teaching and learning process can be achieved through three interdependent dimensions of presence: cognitive presence, social presence, and teaching presence. Emotion is considered an important factor in successful online learning. This study explored non-traditional graduate students’ perceived emotional presence that emerged in participants’ online learning experiences. Based on quantitative and qualitative data from 45 non-traditional graduate students in the field of education, the study showed that participants demonstrated both positive emotional expressions (e.g., enjoyment and happiness) and negative expressions (e.g., frustration and disappointment) in their responses. Emotional presence ratings …

Punishing Pill Mill Doctors: Sentencing Disparities In The Opioid Epidemic, Adam M. Gershowitz

Faculty Publications

Consider two pill mill doctors who flooded the streets with oxycodone and other dangerous opioids. The evidence against both doctors was overwhelming. They each sold millions of opioid pills. Both doctors charged addicted patients hundreds of dollars in cash for office visits that involved no physical examinations and no diagnostic tests. Instead, the doctors simply handed the patients opioids in exchange for cash. To maximize their income, both doctors conspired with street dealers to import fake patients — many of them homeless — so that the doctors could write even more prescriptions. Both doctors made millions of dollars profiting off …

The Promise Of A Multi-Disciplinary, Mixed-Methods Approach To Inform Insect Pest Management: Evidence From Wyoming Alfalfa, Randa Jabbour, Shiri Noy

Faculty Publications

No abstract provided.

From Obstacles To Opportunities: Churches Rising Above The Challenges Of Covid-19, S. Joseph Kidder, Willie Edward Hucks Ii

Faculty Publications

No abstract provided.

Women Leaders And Policy Compliance During A Public Health Crisis, Nichole M. Bauer, Jeong Hyun Kim, Yesola Kweon

Faculty Publications

How does the gender of a political leader affect policy compliance of the public during a public health crisis? State and national leaders have taken a variety of policy measures to combat the COVID-19 pandemic, with varying levels of success. While many female leaders have been credited with containing the spread of COVID-19, often through implementing strict policy measures, there is little understanding of how individuals respond to public health policy recommendations made by female and male leaders. This article investigates whether citizens are more willing to comply with strict policy recommendations about a public health issue when those recommendations …

Octenidine/Carbenicillin Gumbos As Potential Treatment For Oropharyngeal Gonorrhoea, Kelsey M. Lopez, Jeffrey A. Hobden, Isiah M. Warner

Faculty Publications

© The Author(s) 2020. Background: Reducing Neisseria gonorrhoeae colonies in the oropharynx is a viable solution to minimize the transmission of this bacterium amongst individuals. Objectives: A strategy involving the electrostatic interaction between a common antiseptic and a discontinued antibiotic (i.e. octenidine and carbenicillin) was evaluated as a potential treatment for gonorrhoea. Octenidine/carbenicillin is a novel group of uniform materials based on organic salts (GUMBOS) with inherent in vitro antibacterial activity that comes from its parent antiseptic and antibacterial ions, octenidine and carbenicillin, respectively. Methods: Antibacterial activities for octenidine dihydrochloride, disodium carbenicillin, octenidine/carbenicillin and stoichiometrically equivalent 1:1 octenidine dihydrochloride to …

Mobilization Of Iron Stored In Bacterioferritin Is Required For Metabolic Homeostasis In Pseudomonas Aeruginosa, Achala N.D. Punchi Hewage, Leo Fontenot, Jessie Guidry, Thomas Weldeghiorghis, Anil K. Mehta, Fabrizio Donnarumma, Mario Rivera

Faculty Publications

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Iron homeostasis offers a significant bacterial vulnerability because pathogens obtain essential iron from their mammalian hosts, but host-defenses maintain vanishingly low levels of free iron. Although pathogens have evolved mechanisms to procure host-iron, these depend on well-regulated iron homeostasis. To disrupt iron homeostasis, our work has targeted iron mobilization from the iron storage protein bacterioferritin (BfrB) by blocking a required interaction with its cognate ferredoxin partner (Bfd). The blockade of the BfrB–Bfd complex by deletion of the bfd gene (∆bfd) causes iron to irreversibly accumulate in BfrB. In this study we …

Colletotrichum Truncatum Causing Anthracnose On Papaya Fruit (Carica Papaya) In Brazil, Willie Anderson Dos Santos Vieria, Angélica Dos Santos Nunes, Josiene Silva Veloso, Alexandre Reis Machado, Valdir Queiroz Balbino, Anthony Carlos Da Silva, André Ângelo Medeiros Gomes, Vinson Patrick Doyle, Marcos Paz Saraiva Câmara

Faculty Publications

Papaya anthracnose caused by Colletotrichum truncatum is reported for the first time in Brazil. The etiological agent was identified by a combination of morphological and molecular approaches. Pathogenicity was confirmed and Koch’s postulates fulfilled for a selected isolate from Porto Seguro, Bahia, Brazil.

Fungicide Resistance In Cercospora Species Causing Cercospora Leaf Blight And Purple Seed Stain Of Soybean In Argentina, Francisco J. Sautua, Vinson P. Doyle, Paul P. Price, Alejandro Porfiri, Paula Fernandez, Maria M. Scandiani, Marcelo A. Carmona

Faculty Publications

Cercospora species cause cercospora leaf blight (CLB) and purple seed stain (PSS) on soybean. Because there are few resistant soybean varieties available, CLB/PSS management relies heavily upon fungicide applications. Sensitivity of 62 Argentinian Cercospora isolates to demethylation inhibitor (DMI), methyl benzimidazole carbamate (MBC), quinone outside inhibitor (QoI), succinate dehydrogenase inhibitor (SDHI) fungicides, and mancozeb was determined in this study. All isolates were sensitive to difenoconazole, epoxiconazole, prothioconazole, tebuconazole, and cyproconazole (EC50 values ranged from 0.006 to 2.4 µg/ml). In contrast, 51% of the tested isolates were sensitive (EC50 values ranged from 0.003 to 0.2 µg/ml), and 49% were highly resistant …

Families Coping With Financial Loss Following The Deepwater Horizon Oil Spill, Kathryn Sweet Keating, Sarah Becker, Ifeyinwa F. Davis, Thomas Chandler, Tim Slack, Jaishree Beedasy

Faculty Publications

Objective: This study examines family strategies for coping and adaptation to social disruption from the 2010 Deepwater Horizon oil spill (DHOS) in south Louisiana. Background: The DHOS is a technological disaster of unprecedented scale and ongoing impact, including the socioeconomic disruption of families. Method: Using data from focus groups, grounded-theory methods informed a thematic analysis of spill-related economic loss and coping mechanisms among families in the spill-affected region. Results: Key findings were as follows: (a) long-term economic impacts persisted but were nuanced and differed across places; (b) for families living in multistressor environments, concerns about the DHOS spilled over into …

Practices Of Athletic Trainers Using Weight Charts To Determine Hydration Status And Fluid-Intervention Strategies, Jeremy M. Eith, Clint R. Haggard, Dawn M. Emerson, Susan Yeargin Ph.D., Atc

Faculty Publications

Context

Determining an athlete's hydration status allows hydration-related concerns to be identified before significant medical or performance concerns arise. Weight charts are an accurate measure of hydration status changes, yet their clinical use by athletic trainers (ATs) is unknown.

Objective

To investigate ATs' use of weight charts in athletic settings and describe their subsequent clinical decisions.

Design

Cross-sectional survey.

Setting

High schools and National Collegiate Athletic Association Divisions I, II, III and National Association Intercollegiate Athletics colleges.

Patients or Other Participants

A total of 354 ATs (men = 162, women = 175; 17 respondents did not answer the demographic questions) …

Practices Of Athletic Trainers Using Weight Charts To Determine Hydration Status And Fluid-Intervention Strategies, Jeremy M. Eith, Clint R. Haggard, Dawn M. Emerson, Susan W. Yeargin Ph.D., Atc

Faculty Publications

Context

Determining an athlete's hydration status allows hydration-related concerns to be identified before significant medical or performance concerns arise. Weight charts are an accurate measure of hydration status changes, yet their clinical use by athletic trainers (ATs) is unknown.

Objective

To investigate ATs' use of weight charts in athletic settings and describe their subsequent clinical decisions.

Design

Cross-sectional survey.

Setting

High schools and National Collegiate Athletic Association Divisions I, II, III and National Association Intercollegiate Athletics colleges.

Patients or Other Participants

A total of 354 ATs (men = 162, women = 175; 17 respondents did not answer the demographic questions) …

Associative Nitrogen Fixation Linked With Three Perennial Bioenergy Grasses In Field And Greenhouse Experiments, Jayani J. Wewalwela, Yuan Tian, Janet R. Donaldson, Brian S. Baldwin, Jac J. Varco, Brett Rushing, Haoliang Lu, Mark A. Williams

Faculty Publications

© 2020 The Authors. Associative nitrogen (N₂)‐fixation (ANF) by bacteria in the root‐zone of perennial bioenergy grasses has the potential to replace or supplement N fertilizer and support sustainable production of biomass, but its application in marginal ecosystems requires further evaluation. In this study, we first combined both greenhouse and field experiments, to explore the N₂ fixation effects of three temperate feedstocks Miscanthus × giganteus (giant miscanthus, Freedom), Panicum virgatum (switchgrass, Alamo), and Saccharum sp. (energycane, Ho 02‐147). In field studies across three growing seasons, plant and soil pools of candidate feedstocks were partially composed of N …

The Role Of The Msaabcr Operon In Implant-Associated Chronic Osteomyelitis In Staphylococcus Aureus Usa300 Lac, Gyan S. Sahukhal, Michelle Tucci, Hamed Benghuzzi, Gerri Wilson, Mohamed O. Elasri

Faculty Publications

The msaABCR operon regulates several staphylococcal phenotypes such as biofilm formation, capsule production, protease production, pigmentation, antibiotic resistance, and persister cells formation. The msaABCR operon is required for maintaining the cell wall integrity via affecting peptidoglycan cross-linking. The msaABCR operon also plays a role in oxidative stress defense mechanism, which is required to facilitate persistent and recurrent staphylococcal infections. Staphylococcus aureus is the most frequent cause of chronic implant-associated osteomyelitis (OM). The CA-MRSA USA300 strains are predominant in the United States and cause severe infections, including bone and joint infections.

Court-Appointment Compensation And Rural Access To Justice, Hannah Haksgaard

Faculty Publications

Hourly rates paid to court-appointed lawyers impact access to justice. Court appointed lawyers provide necessary counsel in civil and criminal cases, yet hourly rates in many jurisdictions are so low that many lawyers cannot afford to take court-appointed cases. This article argues that low hourly rates cause problems: namely, appointed lawyers will be insufficient in number, inaccessible to their clients, and sometimes even ineffective. These problems are heightened in rural America where they are compounded by geographical distance and the rural lawyer shortage. This article concludes by suggesting a number of policy solutions.

Monitoring The Spatial Spread Of Covid-19 And Effectiveness Of Control Measures Through Human Movement Data: Proposal For A Predictive Model Using Big Data Analytics, Zhenlong Li, Xiaoming Li, Dwayne Porter Ph.D., Jiajia Zhang Ph.D., Yuqin Jiang, Bankole Olatosi Ph.D., Sharon Weissman

Faculty Publications

Background: Human movement is one of the forces that drive the spatial spread of infectious diseases. To date, reducing and tracking human movement during the COVID-19 pandemic has proven effective in limiting the spread of the virus. Existing methods for monitoring and modeling the spatial spread of infectious diseases rely on various data sources as proxies of human movement, such as airline travel data, mobile phone data, and banknote tracking. However, intrinsic limitations of these data sources prevent us from systematic monitoring and analyses of human movement on different spatial scales (from local to global). Objective: Big data from social …

Homotopy Simulation Of Dissipative Micropolar Flow And Heat Transfer From A Two-Dimensional Body With Heat Sink Effect: Applications In Polymer Coating, O. A. Bég, B. Vasu, A. K. Ray, T. A. Beg, A. Kadir, H. J. Leonard, Rama S. R. Gorla

Faculty Publications

Non-Newtonian flow from a wedge constitutes a fundamental problem in chemical engineering systems and is relevant to processing of polymers, coating systems, etc. Motivated by such applications, the homotopy analysis method (HAM) was employed to obtain semi-analytical solutions for thermal convection boundary layer flow of incompressible micropolar fluid from a two-dimensional body (wedge). Viscous dissipation and heat sink effects were included. The non-dimensional boundary value problem emerges as a system of nonlinear coupled ordinary differential equations, by virtue of suitable coordinate transformations. The so-called Falkner-Skan flow cases are elaborated. Validation of the HAM solutions was achieved with earlier simpler models, …

Engaging Empirical Dynamic Modeling To Detect Intrusions In Cyber-Physical Systems, David R. Crow, Scott R. Graham, Brett J. Borghetti, Patrick J. Sweeney

Faculty Publications

Modern cyber-physical systems require effective intrusion detection systems to ensure adequate critical infrastructure protection. Developing an intrusion detection capability requires an understanding of the behavior of a cyber-physical system and causality of its components. Such an understanding enables the characterization of normal behavior and the identification and reporting of anomalous behavior. This chapter explores a relatively new time series analysis technique, empirical dynamic modeling, that can contribute to system understanding. Specifically, it examines if the technique can adequately describe causality in cyber-physical systems and provides insights into it serving as a foundation for intrusion detection.

Biochemical And Genetic Analysis Of Ecm14, A Conserved Fungal Pseudopeptidase, R. Christian Mcdonald, Matthew James Schott, Temitope A. Idowu, Peter J. Lyons

Faculty Publications

© 2020, The Author(s). Background: Like most major enzyme families, the M14 family of metallocarboxypeptidases (MCPs) contains a number of pseudoenzymes predicted to lack enzyme activity and with poorly characterized molecular function. The genome of the yeast Saccharomyces cerevisiae encodes one member of the M14 MCP family, a pseudoenzyme named Ecm14 proposed to function in the extracellular matrix. In order to better understand the function of such pseudoenzymes, we studied the structure and function of Ecm14 in S. cerevisiae. Results: A phylogenetic analysis of Ecm14 in fungi found it to be conserved throughout the ascomycete phylum, with a group of …

This Is My Vision’: How Students Depict Critiques Along With Themselves During Critiques, Jason K. Mcdonald, Esther Michela

Faculty Publications

In this article we consider critiques within the design studio as how students press forward into possible forms of the self that are opened up through studio participation. We contrast this with a view of critiques as primarily being a pedagogical or socialising technique under the control of instructors and other critics. We carried out our inquiry using interviews with six studio students, studying how they depict critiques and how they depict themselves when being critiqued. Students’ depictions of critiques included their being: a) signal in the noise; b) windows into their critics’ character; c) a type of text to …

Variedades: Intermediate/Advanced Spanish Conversation, Carmela V. Mattza

Faculty Publications

VARIEDADES is a Spanish conversation book for the student at the intermediate / advanced intermediate level (DELE nivel B2). Through audiovisual activities, the student is expected to put their previous knowledge into practice and continue to develop their ability to understand, write, listen and speak in Spanish.

VARIEDADES offers communicative activities that can be easily adapted into courses of different levels. In addition, it offers an appendix of activities with films and a Spanish grammar section that by subject directs the student to electronic databases that are freely accessible or are part of the Open Access platform

Chloramination Of Iopamidol- And Bromide-Spiked Waters Containing Natural Organic Matter, Nana Osei B Ackerson, Hannah K. Liberatore, Susan D. Richardson, Micheal J. Plewa, Thomas A. Ternes, Stephen E. Duirk

Faculty Publications

Iopamidol (an iodinated X-ray contrast medium) and bromide are precursors in the formation of halogenated disinfection byproducts (DBPs). The interactions of these precursors are vital to elucidate the formation of halogenated DBPs during chloramination. This work investigated the formation of total organic halogen and select individual DBPs in two laboratory-chloraminated source waters containing iopamidol and bromide. Experiments were carried out in batch reactors containing Barberton source water (BSW) and Cleveland BSW (CSW), spiked with iopamidol (5 mu M), bromide (15 mu M), and 100 mu M monochloramine. Total organic iodine concentrations were approximately equal regardless of source water since they …