Daughters of Ares: Iconography of the Amazons

This project will investigate the myth and the imaginative flexibility of the Amazon idea. I am not trying to prove that the Amazons were a real people but that the myth created and interpreted through time in depictions detailed in art and literature have culminated in the reception of popular entertainment. By looking at narratives and depictions both ancient and modern, I plan to investigate the interpretations of the myth in visual arts and compare that same myth interpreted in visual media today. By analyzing the modern media in the categories of the comic book universe and television adaptations, I seek to illuminate the connections between the ancient depictions of the myth to the modern. This analysis will highlight the flexibility of the myth in its multiple interpretations and also the significance of these interpretation in the cultural contexts in which they were created and popularized

On the Nature of Trapped-Hole States in CdS Nanocrystals and the Mechanism of their Diffusion

Recent transient absorption experiments on CdS nanorods suggest that photoexcited holes rapidly trap to the surface of these particles and then undergo diffusion along the rod surface. In this paper, we present a semiperiodic DFT model for the CdS nanocrystal surface, analyze it, and comment on the nature of both the hole-trap states and the mechanism by which the holes diffuse. Hole states near the top of the valence band form an energetic near continuum with the bulk, and localize to the non-bonding sp$^3$ orbitals on surface sulfur atoms. After localization, the holes form nonadiabatic small polarons that move between the sulfur orbitals on the surface of the particle in a series of uncorrelated, incoherent, thermally-activated hops at room temperature. The surface-trapped holes are deeply in the weak-electronic coupling limit and, as a result, undergo slow diffusion.Comment: 4 figure

Frequency of Genetic Variants at the MC1R Locus in a Student Population

The Melanocortin-1 Receptor gene (MC1R) encodes a protein that is associated with pigmentation in vertebrate animals. An extraordinary number of variations in this gene have arisen over time due to the importance of pigmentation in camouflage, photosensitivity, vitamin D production, and other evolutionary factors. Variations in the MC1R gene sequence became important to survival as humans migrated out of Africa and into cooler climates with less sun exposure, where lighter skin pigmentation (and therefore more vitamin D production) was key to survival. These genetic variations (alleles) continue to exist in modern humans. Recent research into the MC1R gene variations shows that variants occur at different frequencies in different human populations. For example, a variant named R151C occurs in about 9% of humans of European descent but is not detected in humans of Asian descent.https://scholarworks.moreheadstate.edu/celebration_posters_2022/1012/thumbnail.jp

Head Injury risk and car seat use for children in collisions

Background: Motor vehicle collisions (MVCs) are the leading cause of death for people under the age of 17 years. Almost 80% of rear seat motor vehicle passengers are children. Previous studies have shown that a large fraction of injuries to children in MVCs involved the head and chest. In this study, the hypothesis that children under the age of eight using a forward-facing child restraint system (FFCRS) will have more severe head injuries than children using any other type of restraints in an MVC was tested. Methods: Several datasets obtained from Transport Canada and Level 1 Pediatric Trauma Centre emergency and admission reports containing collision, occupant, and injury information were combined and trends were analyzed. Results: Investigations for 42 cases were analyzed (6 fatal / 36 non-fatal injury). Fourteen children had severe head injuries and five of those were fatal. All of those with severe head injuries were using FFCRSs. However, more than half were incorrectly used or installed, or not used at all (8/14). Discussion & Conclusion: Restraint misuse for child passengers leads to more severe head injuries in MVCs. FFCRSs that are properly used decrease risk of injury and death. Interdisciplinary Reflection: The findings from this study help to determine why younger children are injured more severely in crashes and whether these injuries are related to the type of restraint system used. This information can be used to create new CRS designs to prevent further injury as well as create treatment plans for the most common youth head injuries

The Behavior and Measurement of Hygroscopic Expansion of Dental Casting Investment

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67033/2/10.1177_00220345540330041201.pd

Assessing Florida Early Career Extension Faculty\u27s Adoption of Design Principles to Communicate Messages

Extension faculty are tasked with developing and communicating educational programs to local clientele, and communication skills are a considerable piece of the Extension faculty job. Thus, UF/IFAS Extension included a communication portion to the on-board training for newly hired Extension faculty to develop their design skills so they can more effectively communicate through their educational and marketing materials. We used Rogers’ (2003) innovation-decision process to assess Florida early career Extension faculty’s adoption of design principles after completion of the 2019 UF/IFAS Extension Faculty Development Academy. Thirty-two Extension faculty completed the spring and fall sessions of the Academy. A mixed methods approach was utilized to gather survey data at the immediate completion of the Academy and qualitative, telephone interview data four to five months after completing the Academy. The faculty retrospectively perceived they increased their knowledge about design principles. They had an overwhelmingly positive attitude about learning design principles to better their communication efforts, but they decided not to fully adopt design principles in their work as other information and elements of learning their job took precedent

Arginase Promotes Skeletal Muscle Arteriolar Endothelial Dysfunction in Diabetic Rats

Endothelial dysfunction is a characteristic feature in diabetes that contributes to the development of vascular disease. Recently, arginase has been implicated in triggering endothelial dysfunction in diabetic patients and animals by competing with endothelial nitric oxide synthase for substrate L-arginine. While most studies have focused on the coronary circulation and large conduit blood vessels, the role of arginase in mediating diabetic endothelial dysfunction in other vascular beds has not been fully investigated. In the present study, we determined whether arginase contributes to endothelial dysfunction in skeletal muscle arterioles of diabetic rats. Diabetes was induced in male Sprague Dawley rats by streptozotocin injection. Four weeks after streptozotocin administration, blood glucose, glycated hemoglobin, and vascular arginase activity were significantly increased. In addition, a significant increase in arginase I and II mRNA expression was detected in gracilis muscle arterioles of diabetic rats compared to age-matched, vehicle control animals. To examine endothelial function, first-order gracilis muscle arterioles were isolated, cannulated in a pressure myograph system, exposed to graded levels of luminal flow, and internal vessel diameter measured. Increases in luminal flow (0-50µL/min) caused progressive vasodilation in arterioles isolated from control, normoglycemic animals. However, flow-induced vasodilation was absent in arterioles obtained from streptozotocin-treated rats. Acute in-vitro pretreatment of blood vessels with the arginase inhibitors Nω-hydroxy-nor-L-arginine or S-(2-boronoethyl)-L-cysteine restored flow-induced responses in arterioles from diabetic rats and abolished differences between diabetic and control animals. Similarly, acute in-vitro pretreatment with L-arginine returned flow-mediated vasodilation in vessels from diabetic animals to that of control rats. In contrast, D-arginine failed to restore flow-induced dilation in arteri

Reconstructing phase-resolved hysteresis loops from first-order reversal curves

The first order reversal curve (FORC) method is a magnetometry based technique used to capture nanoscale magnetic phase separation and interactions with macroscopic measurements using minor hysteresis loop analysis. This makes the FORC technique a powerful tool in the analysis of complex systems which cannot be effectively probed using localized techniques. However, recovering quantitative details about the identified phases which can be compared to traditionally measured metrics remains an enigmatic challenge. We demonstrate a technique to reconstruct phase-resolved magnetic hysteresis loops by selectively integrating the measured FORC distribution. From these minor loops, the traditional metrics - including the coercivity and saturation field, and the remanent and saturation magnetization - can be determined. In order to perform this analysis, special consideration must be paid to the accurate quantitative management of the so-called reversible features. This technique is demonstrated on three representative materials systems, high anisotropy FeCuPt thin-films, Fe nanodots, and SmCo/Fe exchange spring magnet films, and shows excellent agreement with the direct measured major loop, as well as the phase separated loops

Impact of different environmental conditions on the aggregation of biogenic U(IV) nanoparticles synthesized by Desulfovibrio alaskensis G20

This study investigates the impact of specific environmental conditions on the formation of colloidal U(IV) nanoparticles by the sulfate reducing bacteria (SRB, Desulfovibrio alaskensis G20). The reduction of soluble U(VI) to less soluble U(IV) was quantitatively investigated under growth and non-growth conditions in bicarbonate or 1,4-piperazinediethanesulfonic acid (PIPES) buffered environments. The results showed that under non-growth conditions, the majority of the reduced U nanoparticles aggregated and precipitated out of solution. High resolution transmission electron microscopy revealed that only a very small fraction of cells had reduced U precipitates in the periplasmic spaces in the presence of PIPES buffer, whereas in the presence of bicarbonate buffer, reduced U was also observed in the cytoplasm with greater aggregation of biogenic U(IV) particles at higher initial U(VI) concentrations. The same experiments were repeated under growth conditions using two different electron donors (lactate and pyruvate) and three electron acceptors (sulfate, fumarate, and thiosulfate). In contrast to the results of the non-growth experiments, even after 0.2 mu m filtration, the majority of biogenic U(IV) remained in the aqueous phase resulting in potentially mobile biogenic U(IV) nanoparticles. Size fractionation results showed that U(IV) aggregates were between 18 and 200 nm in diameter, and thus could be very mobile. The findings of this study are helpful to assess the size and potential mobility of reduced U nanoparticles under different environmental conditions, and would provide insights on their potential impact affecting U(VI) bioremediation efforts at subsurface contaminated sites