Mapping out the electronic and magnetic transitions in mixed-valent La1-xSrxMnO3 thin films

The rich phase diagram in mixed-valent manganites has been intensely studied in bulk crystals as a function of chemical doping. Here we study the effect of doping in La1-xSrxMnO3 thin films by varying the Sr/La ratio between samples. These thin films are grown using ozone assisted molecular beam epitaxy with carefully controlled stoichiometry for a range of doping from x = 0.0 to x = 0.5. Our electronic measurements reveal a crossover from a Mott insulator to a metallic ground state as x is increased. In the metallic ground state we observe a metal-to-insulator transition coincident with a ferromagnetic-to-paramagnetic ordering transition consistent with the double exchange interaction with higher, doping dependent transition temperatures compared to those reported for bulk La1-xSrxMnO3 crystals. We will also discuss the magnetic ordering transitions observed in the low doping regime (x\u3c0.17) where an insulating ground state is observed and compare these transitions with those reported for bulk La1-xSrxMnO3 crystals. *NSF Grant No. DMR-16-2633

Electronic and magnetic order as a function of doping in mixed-valent LA1-xSrxMn03 thin films

The rich phase diagram in mixed-valent manganites has been intensely studied in bulk crystals as a function of chemical doping. Here we study the effect of doping in La1-xSrxMnO3 thin films by varying the Sr/La ratio between samples. These thin films are grown using ozone assisted molecular beam epitaxy with carefully controlled stoichiometry for a range of doping from x = 0.0 to x = 0.5. Our electronic measurements reveal a crossover from a Mott insulator to a metallic ground state as x is increased. In the metallic ground state we observe a metal-to-insulator transition coincident with a ferromagnetic-to-paramagnetic ordering transition consistent with the double exchange interaction with higher, doping dependent transition temperatures compared to those reported for bulk La1-xSrxMnO3 crystals. We will also discuss the magnetic ordering transitions observed in the low doping regime (

Mouth Rinsing With a Pink Non-caloric, Artificially-Sweetened Solution Improves Self-Paced Running Performance and Feelings of Pleasure in Habitually Active Individuals

Purpose: The purpose of this study was to investigate whether mouth rinsing with a pink non-caloric, artificially sweetened solution can improve self-selected running speed and distance covered during a 30 min running protocol. Methods: Ten healthy and habitually active individuals (six males, four females) completed two experimental trials in a randomised, single-blind, crossover design. Each experimental trial consisted of a 30 min treadmill run at a self-selected speed equivalent to 15 (hard/heavy) on the rating of perceived exertion scale. During exercise, participants mouth rinsed with either a pink or a clear non-caloric, artificially sweetened solution, with performance, perceptual and physiological measures obtained throughout. Results: Self-selected running speed (+0.4 ± 0.5 km·h−1, p = 0.024, g = 0.25) and distance covered (+213 ± 247 m, p = 0.023, g = 0.25) during the 30 min running protocol were both improved by 4.4 ± 5.1% when participants mouth rinsed with the pink solution when compared to the clear solution. Feelings of pleasure were also enhanced during the 30 min treadmill run when participants mouth rinsed with the pink solution, with ratings increased from 3.4 ± 0.7 in the clear condition to 3.8 ± 0.6 in the pink condition (+0.4 ± 0.5, p = 0.046, g = 0.54). Conclusion: Mouth rinsing with a pink non-caloric, artificially sweetened solution improved self-selected running speed, total distance covered, and feelings of pleasure obtained during a 30 min running protocol when compared to an isocaloric and taste-matched clear solution

??? to Snowbird: Education, Assimilation, and Integration of Cherokee in the Snowbird Community, 1932-1965

??? to Snowbird: Education, Assimilation, and Integration of Cherokee in the Snowbird Community, 1932-1965, explores the history of education of the Cherokees in the Snowbird Community. Beginning with a brief look at the Cherokee Boarding School and the creation of the Snowbird Day School. Exposing the effects that the Bureau of Indian Affairs assimilation policies and tactics had on this small Eastern Band of Cherokee Community. The assimilation process culminated in the integration of the Cherokee students into the Graham County school system, a process that took 11 years from 1954 to 1965. The Snowbird Community is apart of the Eastern Band of Cherokee Indians (EBCI) Qualla Boundary, but it is located approximately one hour west of the main EBCI territory. This distance was key in creating the unique educational path that the community was placed on, with the adverse effects lasting for generations

A Protocol to Overcome the Negative Health Effects Associated with Urinary Catheters in the Hospital Setting; A Quality Improvement Project

There are estimated to be 449,334 CAUTI events per year (hospitalsafelygrade). As well, this costs the health care system to the United States Healthcare System which shows that it costs the country an extra 340-370 million every year (Gray et al., 2016). The purpose of this quality improvement project is to determine how to overcome the negative effects that patients experience when receiving catheters (indwelling or external) while in the hospital. Increased catheter rates and infections were noted at an urban teaching hospital which led to the creation of this new protocol guideline.https://scholarworks.moreheadstate.edu/celebration_posters_2021/1049/thumbnail.jp

Implementation of PRSEUS for General Aviation Aircraft

A lighter, more robust airframe is one of the key technological advancements necessary for the successful launch of any large next-generation transport aircraft. Such a premise dictates that considerable improvements beyond current state-of-the-art aluminum structures are needed and improvements will require extensive use of composite materials. Composite materials are light weight and offer the same, if not more, load bearing capabilities when compared to conventional aluminum aircraft structures. NASA and the Boeing Company have been actively working on the development and optimization of a new composite structural concept that presents substantial advantages over traditional aircraft structures. The new concept, named Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS), offers damage arresting capabilities and weight reductions for transport category aircraft by eliminating the use of fasteners by employing stitched unitized co-cured panels. . With majority of the aircraft operating under general aviation category, applications of such new structural concepts can be valuable. In addition, when dealing with safety in aviation, airworthiness and crashworthiness are important to consider when creating an aircraft structure. Moreover, general aviation has a higher likeliness to be involved in a crash when compared to transport aircraft with high mortality rates. The PRSEUS structural concept promises improved crashworthiness of general aviation aircraft due to the characteristics of the composite structure having a higher energy absorption compared to conventional aircraft aluminum structures. By implementing the PRSEUS concept structure on a general aviation aircraft such as the Cessna 172 Skyhawk, the nature of carbon fiber composites will offer better crash worthiness and the damage arresting capabilities due to the stitching will allow for higher loading to be applied. In addition, if PRSEUS can successfully perform under primary loads, it could mean weight savings for the aircraft

At-home blood collection and stabilization in high temperature climates using home RNA

Expanding whole blood sample collection for transcriptome analysis beyond traditional phlebotomy clinics will open new frontiers for remote immune research and telemedicine. Determining the stability of RNA in blood samples exposed to high ambient temperatures (\u3e30°C) is necessary for deploying home-sampling in settings with elevated temperatures (e.g., studying physiological response to natural disasters that occur in warm locations or in the summer). Recently, we have develope

Exploration of Club Motorcycle Riding for Veteans

There is significantly limited research regarding the occupation of club motorcycle riding, and even more limited with its application to the veteran population The study yielded 17 survey participants and 7 interview participants from the VFW MC. The study aimed to discover the benefits of club motorcycle riding for the veteran population through a Doing, Being, Becoming, and Belonging Framework. The data consisted of both quantitative and qualitative components which revealed four overall themes. The four main themes that came from the data analysis were (1) Camaraderie, (2) Mental and Emotional Health Through Occupation, (3) Reconstruction of Identity, and (4) Altruistic Contributions. From trust to brotherhood, each veteran seemed to have a connection within the VFW MC that they have not experienced since their time in the service. There was a collective sense of occupation that underlined each members answers when explaining the importance of the club. Having a role within a group occupation can be a benefit to those going through life transitions, such as retirement. There needs to be a further emphasis on the importance of discovering the ways occupational therapy can promote a collectivistic mindset within the veteran population.https://soar.usa.edu/otdcapstonessummer2024/1039/thumbnail.jp