Institutional Repository

The UDSpace Institutional Repository collects and disseminates research material from the University of Delaware.

  • Faculty, staff, and graduate students can deposit their research material directly into UDSpace. Faculty may use UDSpace to fulfill the University of Delaware Faculty Senate Open Access Resolution, and in many cases may use it to fulfill open access requirements from grant funding agencies.
  • Departments can use UDSpace to publish or distribute their working papers, technical reports, or other research material.
  • UDSpace also includes all doctoral dissertations from winter 2014 forward, and all master's theses from fall 2009 forward.

To learn more about UDSpace, and how you can make your research openly accessible to the public, visit our UDSpace Policies website.

 

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Recent Submissions

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What Is a Girl Worth?: Gender-Based Violence and Accountability in SportsWorld
(Sociology of Sport Journal, 2024-05-25) Kiss, Marissa; Foltz, Katelyn E.; Hattery, Angela; Mirance, Katie; Smith, Earl
Despite having clear policies that address athlete misconduct, including gender-based violence, at the collegiate and professional levels, members of SportsWorld—athletes, coaches, and staff—are rarely, if ever, held accountable. And, even when they face a penalty, more than 80% are allowed to either remain on the team or transfer and continue playing. In this paper, we explore the impact of this lack of accountability, including the “positive” benefits to players that include the opportunity to play in national playoffs and secure lucrative contracts as well as the negative impacts on victims and communities, most disturbingly the impact of serial abusers like Larry Nassar whose unfettered access to athletes resulted in hundreds of victimized individuals.
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Incorporating flowpaths as an explicit measure of river-floodplain connectivity to improve estimates of floodplain sediment deposition
(Geomorphica, 2024-05-28) Sumaiya, Sumaiya; Schubert, John T.; Czuba, Jonathan A.; Pizzuto, James E.
Variation in floodplain topography can lead to gradual flooding and increase river-floodplain connectivity. We show that incorporating flowpaths as an explicit measure of river-floodplain connectivity can improve estimates of floodplain sediment deposition. We focus on the floodplain of the South River, downstream of Waynesboro, Virginia, where measurements of mercury accumulation have been used to estimate decadal-scale sedimentation rates. We developed a two-dimensional Hydrologic Engineering Center's River Analysis System (2D HEC-RAS) hydrodynamic model and used simulated model results with sediment deposition data to create regression models describing sedimentation across the floodplain. All of our statistical models incorporated a flowpath length from the location on the floodplain downstream to the riverbank as an explicit measure of river-floodplain connectivity that improved our estimates of floodplain sediment deposition (r2 = 0.514). We applied our best regression model to our hydrodynamic model results to create a map of floodplain sedimentation rate and discuss differences of three separate sections of floodplain. We found that floodplains with variable topography had wider, bimodal probability distribution functions (PDFs) of sedimentation rate (aggregated spatially) than floodplains without this topographic relief (with narrower log-normal PDFs). Our work highlights how floodplain topography and river-floodplain connectivity affect sedimentation rates and can help inform the development of floodplain sediment budgets.
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Neonicotinoid exposure increases Varroa destructor (Mesostigmata: Varroidae) mite parasitism severity in honey bee colonies and is not mitigated by increased colony genetic diversity
(Journal of Insect Science, 2024-05-28) Bartlett, Lewis J.; Alparslan, Suleyman; Bruckner, Selina; Delaney, Deborah A.; Menz, John F.; Williams, Geoffrey R.; Delaplane, Keith S.
Agrochemical exposure is a major contributor to ecological declines worldwide, including the loss of crucial pollinator species. In addition to direct toxicity, field-relevant doses of pesticides can increase species’ vulnerabilities to other stressors, including parasites. Experimental field demonstrations of potential interactive effects of pesticides and additional stressors are rare, as are tests of mechanisms via which pollinators tolerate pesticides. Here, we controlled honey bee colony exposure to field-relevant concentrations of 2 neonicotinoid insecticides (clothianidin and thiamethoxam) in pollen and simultaneously manipulated intracolony genetic heterogeneity. We showed that exposure increased rates of Varroa destructor (Anderson and Trueman) parasitism and that while increased genetic heterogeneity overall improved survivability, it did not reduce the negative effect size of neonicotinoid exposure. This study is, to our knowledge, the first experimental field demonstration of how neonicotinoid exposure can increase V. destructor populations in honey bees and also demonstrates that colony genetic diversity cannot mitigate the effects of neonicotinoid pesticides.
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Specialist Physicians in Delaware 2018
(Center for Applied Demography & Survey Research, 2019-04) Tóth, Tibor
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Primary Care Physicians in Delaware 2021
(Center for Applied Demography & Survey Research, 2022-02) Tóth, Tibor