Dynamic and thermal analysis of high speed tapered roller bearings under combined loading

The development of a computer program capable of predicting the thermal and kinetic performance of high-speed tapered roller bearings operating with fluid lubrication under applied axial, radial and moment loading (five degrees of freedom) is detailed. Various methods of applying lubrication can be considered as well as changes in bearing internal geometry which occur as the bearing is brought to operating speeds, loads and temperatures

Lichtenberger and The Three Bears: Getting the Private Search Exception and Modern Digital Storage Just Right

Finding a happy medium is hard. Often, it is a challenge to find a workable balance between two unworkable extremes. Known as the “Goldilocks Principle,” this phenomenon has been observed in fields as diverse as developmental psychology and astrobiology. As Goldilocks found in the Three Bears’ house, “just right” may not come on the first attempt. We may have to explore the extremes of the spectrum—“too hot” and “too cold”—before we can settle on “just right. Goldilocks also discovered that this process is all the more difficult in a new environment—like the Three Bears’ house. Goldilocks persevered, however, until she found “just right.” Federal courts face a similar dilemma in the private search exception to warrant requirements under the Fourth Amendment. On one hand are legitimate individual privacy interests and on the other, the legitimate interests of law enforcement to protect society. Courts must not handcuff law enforcement agents in their duties in the name of individual privacy (“too cold”), but neither should they unreasonably curtail individual liberty by giving too much latitude to legitimate government interests (“too hot”). It is no small task to identify an appropriate compromise between the competing principles of protecting the privacy of American citizens and protecting American citizens from crime. Like Goldilocks, courts today also face this challenge in an unfamiliar world. What is the “just right” application of the private search exception in the world of digital storage devices, which hold staggeringly large amounts of data and whose structure challenges traditional Fourth Amendment concepts

Natural histories of Yup'ik memoirs

Thesis (M.A.) University of Alaska Fairbanks, 2017This thesis explores how cultural knowledge is committed to textual form and circulated within and outside of linguistically marginalized communities. Working within a Central Yup'ik context, I have focused my research on collections of Yup'ik elders' memoirs housed within the Alaska Native Language Archive. Published Yup'ik elders' memoirs offer rich descriptions of Yup'ik cultural histories, epistemologies and statements about language, the expression and inclusion of which varies based on the interactional contexts, participant frameworks and funding institutions through which they were produced. This study incorporates both Indigenous and non-Indigenous theoretical frameworks related to the process of entextualization, or text creation, and the transmission of cultural knowledge. Drawing from archival materials and interviews with participants involved in their production and circulation, I identify the relevant linguistic ideologies and participant frameworks involved in the creation of these publications or "text artifacts" and frame my analysis with respect to the following research questions: How have published memoirs of Yup'ik elders emerged as a culturally salient genre of text? Who are the primary participants in the production, publication and circulation of Yup'ik memoirs? How do issues of identity, agency, authenticity and essentialism shape the form, thematic content and circulation of Yup'ik memoirs in Alaska? This thesis seeks to identify the primary participants and ideologies contributing to the publication of Yup'ik elders' memoirs, as well as the visibility or erasure of these actors within the published text of the memoirs. I further explore the specific ways in which individual voices, tribal, political and academic institutions and their ideological goals presuppose and contribute to broader cultural processes and shape the linguistic structure and content of textual artifacts produced. Although the documentation, description and analysis of Yup'ik language and culture has received sustained attention both within and outside the academy, this project is the first to investigate the processes and participant frameworks through which traditional Yup'ik cultural knowledge is entextualized and circulated as contemporary published text. This research offers significant insights into the collaborative efforts of Native and non-Native participants in the production of Yup'ik textual materials, while also contributing to a broader understanding of ideological goals and obstacles relative to processes of entextualization within communities facing marginalization or language endangerment within, and outside of, the circumpolar north. An analysis of the participants and ideologies shaping the production and circulation of Yup'ik memoirs provides and empirical framework for understanding the relationship between text artifacts and ongoing cultural processes, and contributes to an increasingly reflexive approach to anthropological and sociolinguistic research concerning identity, authenticity and the entextualization of traditional knowledge

2021: Dr. Anne R. Crecelius

During Women’s History Month, the Women’s Center coordinates, as an experiential learning opportunity for students, an annual exhibit highlighting the contributions women have made at the University of Dayton. The 2021 theme, Leading with Character and Resilience, captures what it means to work in the midst of a pandemic, social and political unrest and economic uncertainty. Each honoree displayed resilience, drive, character and tenacity and created inspiring ways to move forward.https://ecommons.udayton.edu/women_of_ud/1051/thumbnail.jp

Role of vascular hyperpolarization in muscle blood flow regulation in healthy humans

2013 Spring.Includes bibliographical references.The following investigation composes a series of experiments with the overall aim of determining the role for vascular hyperpolarization via activation of inwardly-rectifying potassium (KIR) channels and Na+/K+-ATPase in the regulation of vascular tone in response to muscle contractions and ischaemia in young, healthy humans. We tested the general hypothesis that activation of KIR channels and Na+/K+-ATPase contributes in large part to the vasodilatory, hyperaemic, and sympatholytic responses observed in these conditions and this contribution is greater than that of other vasodilators, specifically nitric oxide (NO) and prostaglandins (PGs). The specific aims of each experiment were: 1) to determine whether K+-stimulated vascular hyperpolarization via activation of KIR channels and Na+/K+-ATPase mediates contraction-induced rapid vasodilatation in the human forearm; 2) to determine whether vascular hyperpolarization via activation of KIR channels and Na+/K+-ATPase contributes to the hyperaemic response at the onset of repeated muscle contractions, as well as to steady-state forearm blood flow during rhythmic handgrip exercise; 3) to determine whether vascular hyperpolarization via activation of KIR channels and Na+/K+-ATPase contributes to the observed blunting of sympathetically-mediated vasoconstriction that occurs during moderate intensity rhythmic forearm exercise; and 4) to determine whether vascular hyperpolarization via activation of KIR channels and Na+/K+-ATPase contributes to the observed reactive hyperaemia that occurs in the human forearm following release of temporary ischaemia. Our collective findings demonstrate a significant contribution of KIR channels and Na+/K+-ATPase activation to rapid vasodilatation following a single muscle contraction, the onset of exercise hyperaemia in response to repeated muscle contractions, steady-state muscle blood flow during rhythmic handgrip exercise and reactive hyperaemia following temporary ischaemia. In contrast to our hypothesis, we did not observe a significant contribution of KIR channels and Na+/K+-ATPase to the observed blunting of sympathetic α-adrenergic vasoconstriction that occurs during handgrip exercise. In all studies, any role of NO and PGs was modest, if present at all. Taken together, our findings indicate that during a variety of vasodilatory stimuli, there is a large contribution of pathways that are independent of NO and PGs, specifically activation of KIR channels and Na+/K+-ATPase. Hyperpolarization via activation of KIR channels and Na+/K+-ATPase represents a novel mechanistic pathway in the understanding of in vivo regulation of muscle blood flow in response to contractions and ischaemia. These findings may provide insight into understanding impaired vascular function in patient populations and as such, could represent a novel therapeutic target for reversing microvascular dysfunction

From Professor to Patient X

I walked into the classroom feeling nervous. It wasn\u27t my first time teaching undergraduate students about human endocrine physiology. I knew the material well. But today\u27s lecture was different. I pulled up slides depicting a hypothetical cancer patient and told them, “Patient X had a biopsy that detected invasive carcinoma in her breast.” I described the many months of chemotherapy, surgery, and radiation treatments she went through before going into remission. Then I taught the students about the hormonal therapy she was prescribed—drugs her doctor hoped would limit the growth of any remaining cancer cells and prevent a recurrence. On the final slide, I showed them a picture of me on my last day of chemotherapy. “I am patient X,” I revealed

When Working Out Makes You Sick to Your Stomach: What to Know about Exercise-Induced Nausea

You’re doing it! You’re working out, reaping all those benefits of exercise that have been drilled into your head. So you’re pedaling your heart out or running like you’re escaping a zombie horde. You’re feeling accomplished, on cloud nine, until … your stomach starts to churn. You may even feel dizzy. Your feelings of accomplishment have turned to agony as you deal with a bout of nausea. Exercise-induced nausea is quite common, as are exercise-induced gastrointestinal (GI) problems in general, affecting perhaps up to 90% of endurance athletes. So why does this happen and, more important, how can you prevent it

The Administrative Techniques of the Extension Department of the Sunday School

The problem was to present a clear study of the nature, purposes, values and operation of the Extension Department of the Sunday School. It was the writers purpose to present the actual picture of the organization of the Extension Department and its necessity as a regular department of the Sunday School along with its relative position to the church and Sunday School. An attempt was made to present the true picture of the Extension Department by truthfully presenting some of the disadvantages as well as the advantages. Thus the problem may be stated: to find and present the true framework and organization of the Extension Department and to present this, and other f actors involved, in proof of the absolute necessity of the inclusion of such a department in the Sunday School organization