In this study, we investigate the fundamental mechanisms defining the approach for addressing tribological challenges in mechanical systems via the use of the tribocatalytically active coating. The coating is designed using an electrodeposition process and consists of a hard amorphous cobalt-phosphorous matrix with the incorporation of tribocatalytically-active nickel and copper. Our focus is on understanding the effect of the tribocatalytic elements, Cu vs Ni, on the coating's performance in high-contact stress conditions, generating local heating, shear, and compression. By optimizing the relative composition and mechanical characteristics of the coating, we aim to enhance its tribological performance in the presence of a hydrocarbon environment. Through extensive characterization of the wear tracks using SEM/EDS and Raman analyses, we identify the formation of a protective carbon-based tribofilm on the coating's surface during sliding as the key factor behind its excellent performance. Our findings not only contribute to the understanding of material transformations in the contact but also offer a robust and versatile approach to addressing tribological challenges in mechanical systems. The development of this innovative coating opens up new possibilities for promoting the formation of protective tribofilms and improving the performance of mechanical components operating in low-viscosity fuels and synthetic oils.

Hypoxia as a stressor has physiological implications that have been a focal point for many physiological studies in recent years. In some studies, hypoxia had large effects on the organ tissue degeneration, which ultimately effects multiple ecological processes. These organ tissue studies played a part in the development of new fields like neurocardiology, a specialty that studied the relationship between the brain and the heart. This thesis focuses on how hypoxia-induced cardiac arrest alters the amounts of GLYT2, a glycine reuptake transporter, in the central nervous system of zebrafish, Danio rerio. At 7 days post-fertilization (dpf), zebrafish were exposed to acute, severe hypoxia until they lost equilibrium, and minutes later, subsequent cardiac arrest occurred. Zebrafish were then placed into recovery groups to measure the GLYT2 levels at multiple points in zebrafish recovery. Fish were then sacrificed, and their brains dissected. Using immunofluorescence, the outer left optic tectum of the zebrafish was imaged, and mean image pixel fluorescent intensity was taken. There were significant changes (one-way ANOVA) in the levels of GLYT2 compared to that of the control groups during the course of recovery. GLYT2 levels continued to rise through the 24-hour recovery mark but did not show significant difference after …

In model reaction systems to test amino acids in chlorinated waste effluents, several amino acids were chlorinated at high chlorine doses. (2000-4000 mg/1). Amino acids present in municipal waste effluents before and after chlorination were concentrated and purified using cation exchange and Chelex resins. After concentration and cleanup of the samples, the amino acids were derivatized by esterification of the acid functional groups and acylation of the amine groups. Identification and quantification of the amino acids and chlorination products was carried out by gas chromatography/mass spectrometry, using a digital computer data system. Analysis of the waste products revealed the presence of new carbon-chlorine bonded derivatives of the amino acid tyrosine when the effluents were treated with heavy doses of chlorine.

A major consideration in this study has been given to the establishment of the criteria by which the soundness of a testing program could be evaluated as its role in the secondary school. This problem was limited to the planning and administering of a progressive and comprehensive long-range testing program designed to meet the needs and problems common to most school administrators within the economic limits of a small high school. It was not the purpose of this study to anticipate the problems peculiar to particular teachers, high schools, or localities. However, the testing program if properly directed will result in the formation of subsidiary testing programs undertaken by particular teachers or groups of teachers for the purpose of throwing light on the specific problems raised by a large general testing program.

The goal of this study was to determine if performance -based tests should be routinely administered to students in computer application courses. The purpose was to determine the most appropriate mode of testing for individuals taking a computer applications course. The study is divided into areas of assessment, personality traits, and computer attitudes.

This paper is the result of a study of the power method to find dominant eigenvalues of square matrices. It introduces ideas basic to the study and shows the development of the power method for the most well-behaved matrices possible, and it explores exactly which other types of matrices yield to the power method. The paper also discusses a type of matrix typically considered impossible for the power method, along with a modification of the power method which works for this type of matrix. It gives an overview of common extensions of the power method. The appendices contain BASIC versions of the power method and its modification.

Due to their influential roles in the lives of their players, understanding coaches' attitudes and perceptions toward LGBQ+ student-athletes is essential for assessing how safe collegiate sport environments are for LGBQ+ athletes. However, the research in this area has been limited. The present study aims to address this gap by investigating coaches' perceptions of LGBQ+ athletes to inform policy and education for promoting inclusive sport environments for these athletes. Participants were 1,533 collegiate coaches (Mage = 39.65 years; women = 41.3%; White = 83.7%; non-Hispanic = 86.4%; heterosexual = 74.9%) drawn from all three NCAA Divisions. In an open-ended, text response question, coaches were asked to identify the extent to which they would support and accept athletes on their teams being open about their sexual orientation and/or gender identity, and to describe the reasoning for their beliefs. Through reflexive thematic analysis, six higher order themes capturing coaches' rationales were identified: (a) levels of acceptance, (b) i coach, therefore i am…, (c) supportive environments are essential, (d) as a queer coach…, (e) limiting queerness, and (f) sexual orientation does not provide a competitive advantage. Analyses illuminate avenues for LGBQ+ athlete inclusion policies and training for coaches.

The bristlenose pleco (Ancistrus cirrhosus) is a species of armored catfish in the Loricariidae family that breathes air facultatively when the aquatic environment becomes hypoxic. The bristlenose pleco uses its highly vascularized stomach as an air breathing organ. The two main goals of this developmental study were to determine the size of onset of air breathing and to determine the frequency of air breathing behavior in bristlenose plecos from juveniles to adults. Developing juveniles reach functional maturity within four to six months of hatching and grow to an adult size of eight to ten cm in length. To examine the developmental timing for the onset of air breathing, we tested different sized juveniles beginning at one cm up until 8 cm in length. The developmental timing for the onset of air breathing was measured by exposing each fish to a slowly decreasing aquatic oxygen content from 100% air saturation down to 8% air saturation. Fish were first able to breathe air at just over 2 cm and 1 gram in mass. There was a weak negative correlation between fish length and % air saturation at which air breathing began. When exposed to 15% air saturation, frequency of air breathing was …

The Nit1C cluster is a conserved gene cluster of seven genes that confers bacterial growth on cyanide as the sole nitrogen source. Bacteria with this ability are referred to as cyanotrophs. To date, the linkage between Nit1C and cyanotrophy has only been demonstrated for environmental isolates but the cluster also exists in certain medically related bacteria. In this study, a nosocomial isolate, Acinetobacter haemolyticus ATCC 19194, carrying Nit1C also displayed the ability to grow on cyanide. Growth on cyanide was accompanied by the induction of the cluster as was the mere exposure of cells to cyanide. Expression of the cluster was determined by measuring the activity of the nitrilase (NitC) coded for by the cluster and by transcriptional analysis (qRT-PCR). However, a disconnect between nitC message and NitC protein was observed depending on the phase of the growth cycle, the disconnect being related to proteolytic digestion of the NitC protein. Ironically, the cluster was also discovered to be upregulated in the absence of cyanide under nitrogen starvation conditions paralleling biofilm formation. The basis of the genetic linkage to cyanotrophy is not understood but taken together with results showing that nitrogen starvation and biofilm formation are also physiologically associated with Nit1C …

This study analyzed the effects of acculturation, locus of control, and incidence of inhalant use on Mexican Americans. Information was collected from 275 subjects at three middle schools and one treatment center. The instrument consisted of Levenson's Locus of Control Scale, the Acculturation Rating Scale for Mexican Americans, and an incidence of use and family relationship questionnaire developed for this study. Statistical analysis indicated a relationship between acculturation and inhalant use. Further examination revealed relationships between a family members' use and subjects' inhalant use; subjects' alcohol use and inhalant use; and subjects' marijuana use and inhalant use. Information implied that prevention and intervention programs should focus on children of substance users and further research is needed surrounding the role of acculturation.

This study investigated a new approach to achieving high energy density supercapacitors (SCs) by using high surface area self-activated carbon from waste coffee grounds (WCGs) and modifying 3D printed electrodes' porous structure by varying infill density. The derived activated carbons' surface area, pore size, and pore volume were controlled by thermally treating the WCGs at different temperatures (1000˚C, 1100˚C, and 1200˚C) and post-treating with HCL to remove water-soluble ashes and contaminants that block activated carbon pores. Surface area characterization revealed that the carbon activated at 1000˚C had the highest surface of 1173.48 m2 g-1, and with the addition of HCL, the surface area increased to 1209.35 m2 g-1. This activated carbon was used for fabricating the electrodes based on the surface area and having both micropores and macropores, which are beneficial for charge storage. Direct ink writing (DIW) method was utilized for 3D printing SC electrodes and changing the electrode structure by increasing the infill densities at 30%, 50%, and 100%. Upon increasing the infill densities, the electrodes' mass increased linearly, porosity decreased, and the total surface area increased for the 30% and 50% infill electrodes but decreased for the 100% infill electrode. Cyclic voltammetry (CV) test on the assembled …

It would be impossible to trace the evolution of the form of the scherzo without treating also to some extent the history of the minuet, as the scherzo would hardly have come into being in the way it did had there not been the minuet, even though as the scherzo grew to maturity it resembled less and less its parent-form. This thesis examines the early use and origin of the scherzo, and its use and evolution in the works of Beethoven.

In both Mexico and the U.S., abortion rights protests have been taking place in recent years, but while Mexico is moving forward with the legalization of abortion, the U.S. is going in the opposite direction with the overturning of Roe v. Wade. Through framing, journalists select salient information, shaping audiences' understandings of social movements. The protest paradigm suggests that due to journalistic norms and routines, journalists tend to focus on disruptive acts, which can stigmatize the protest. Additionally, scholars have stated that men and women photojournalists have different approaches to covering certain topics. This cross-national research combined a content analysis of photographs in U.S. and Mexican media with in-depth interviews with photojournalists to determine if photojournalists in each country are reproducing the protest paradigm and if there are gendered differences in how they photograph abortion rights protests. The results revealed that women and men photograph differently, with women capturing more intimate photos; however, photojournalists' gendered experiences are also influenced by how protesters perceive them. Furthermore, the study suggests that photojournalists from both countries are questioning objectivity and are attempting to move away from the protest paradigm. This research provides valuable insights into visual framing theory, protest news coverage, and gendered …

The production of Hate, albeit a historical, long-existing, and relentless process, has been reinvigorated by the simultaneously globalizing and localizing power of cyberspace. Techno-capitalism, often perceived as the actuating force of neoliberal globalization, has emanated novel formations of social interaction, community formation, the dissemination of ideology, and political mobilization. Far-right ideology is being globalized throughout popular social cyberspaces like YouTube by thought leaders or ideological entrepreneurs, while users then localize within alternative social cyberspaces like Gab, wherein their beliefs are reaffirmed, identities are consolidated, and communities are formed. This process is integral to the materialization of far-right extremism, manifested as political action in real, physical space, and thus, illuminates new expressions of real virtuality, various politics of scale, and contemporary consequences of neoliberal globalization.

Interfacial mechanical properties of adhesive joints are very crucial in board applications, including composites, multilayer structures, and biomedical devices. Establishing traction-separation (T-S) relations for interfacial adhesion can evaluate mechanical and structural reliability, robustness, and failure criteria. Due to the short range of interfacial adhesion such as micro to nanoscale, accurate measurements of T-S relations remain challenging. The advent of machine learning (ML) became a promising tool to predict materials behaviors and establish data-driven mechanical models. In this study, we integrated a state-of-the-art ML method, finite element analysis (FEA), and standard experiments to develop data-driven models for characterizing the interfacial mechanical properties precisely. Macroscale force-displacement curves are derived from FEA with incorporation of double cantilever beam tests to generate the dataset for ML model. The eXtreme Gradient Boosting (XGBoost) multi-output regressions and classifier models are used to determine T-S relations with R2 score of 98.8% and locate imperfections at the interface with accuracy of around 80.8%. The outcome of the XGBoost models demonstrated accurate predictions and fast calculation speed, outperforming several other ML methods. Using 3D printed double cantilever beam specimens, the performance of the ML models is validated experimentally for different materials. Furthermore, a XGBoost model-based package is designed to …

The trope of the queer cannibal recurs throughout fiction as well as film and television. While literature scholars such as David Bergman and Caleb Crain have written about this figure in American literature, the queer cannibal remains unstudied in the realm of media studies. This thesis analyzes six media texts that feature queer cannibals: Hannibal (2013-2015), Ravenous (1999), The Terror (2018), Yellowjackets (2021-), Raw (2016), and Bones and All (2022). Through these analyses, this thesis establishes a genre termed "queer cannibal texts." These texts function on two different levels: they include a cannibal character who is or can be read as queer, and they in some way cannibalize and queer an existing story or societal script. The presence of a queer cannibal character often signals that the work itself is a queer cannibal text. These texts are built on an awareness of existing power structures and narratives. By cannibalizing these narratives—whether they be a fictional narrative that is being adapted, or societal narratives of white supremacy, heteronormativity, and so on—and interrogating them from a queer perspective, queer cannibal texts create reparative narratives that speak from the margins. Queer cannibal characters act as a textual manifestation of this framework, providing a …

This investigation utilized data from a previous laboratory-based study to examine the interactive contributions of trait involuntary stress responses (ISRs, e.g., rumination) and perceived familial social support (SS) on the hypothalamic-pituitary-adrenal axis (HPA; as indexed via salivary cortisol) response to acute stress in a sample of 128 adolescent girls ages 12 to 16. Participants completed a modified Trier Social Stress Test (TSST), and physiologic stress response was indexed via six salivary cortisol samples. Dimensions of ISRs and familial social support were entered into regression models to predict total cortisol circulation defined by area under the curve with respect to ground (AUCG; Pruessner et al., 2003) following the TSST. Neither ISRs or SS were associated with cortisol AUCG, nor was there an interactive effect of SS on relationships between ISRs and AUCG. Implications of present results and methodological recommendations for future investigations are discussed. This may be the first investigation to consider the interactive effects of ISRs and social support on adolescent girls' HPA responses. Greater understanding of these factors in this understudied demographic will improve translational science as well as inform risk assessment and intervention development.

Ravel' s "Tombeau de Couperin," a suite for piano, was published in 1918 by Durand. Its first performance was in the Salle Gaveau in Paris in April, 1919. Shortly afterwards Ravel scored four of the six movements of the piano suite for small orchestra, composed of flutes, oboes, clarinets, bassoons, and horns in pairs, English horn, trumpet, harp, and strings, The new version was introduced in America in 1920. The four orchestrated movements, Prelude, Forlane, Menuet, and Rigaudon, have no programmatic content and the titles identify the forms used. "Le Tombeau de Couperin" is a souvenir of World War I. Each movement is dedicated to the memory of a French soldier fallen in battle. The "Tombeau" form dates from the seventeenth century and is a musical "homage" to Francois Couperin, clavecinist of Louis XIV, and one of the great names of French music. "The separate movements, cast in eighteenth century dance forms often used by Qouperin have been described as "tonal wreaths," not too somber nor too profuse, laid with tenderness on an unforgotten tomb." This piece represents Ravel's extreme effort to express himself in the simplest possible manner. The music is subtly archaic; form, line and texture artfully suggest …

This thesis investigates the influence of organizational culture on customer experience through a comprehensive study of a global supplier of home repair products. By combining organizational analysis and consumer research, this research draws on anthropological principles to explore the nuances of family governance and their effects on behavior, customer experience, and product design. The results of this study present insightful information on product perception and actionable strategies to improve product design, branding, and messaging in order to enhance customer experience and drive sales. Drawing on organizational anthropology and the utilization of critical reflexivity, this thesis provides a deeper understanding of how family-owned businesses can leverage research to challenge their cultural assumptions about products, consumers, and their organization, in order to effectively implement customer-centric solutions and drive organizational behavior, customer experience, and product development.

Soft actuation methods are a developing field of robotics deemed suitable for physical human-robot interactions due to the adaptability of materials and compliant structures. Thermo-active soft actuators are a subset of these which convert thermal energy to mechanical work in the form of elongation, bending, or twisting to conform to the environment. This study is divided into three major studies that all use actuators with a working principle of phase-change fluid vaporizing for expansion with applied heat from a Peltier. The first study evaluates the bandwidth and efficiency between (i) traditional Joule heating, and (ii) Peltier heating, finding that Peltier heating can considerably improve the operational bandwidth of the actuator. The second study uses a thin membrane actuator placed in a braided mesh to form a McKibben muscle capable of lifting 5N, and formed into a gripper capable of manipulating objects within the environment. The third study uses actuators of a solid, hollow and flexible Peltier embedded silicone structure and are evaluated and optimized in order to increase actuation speed, finding that the embedded flexible Peltier design was able to elongate over 50% of its original height in 20 seconds. The overall aim of all of these studies was to …

The relationship between Erasmus of Rotterdam and the religious movement called the Devotio Moderna, especially the latter's relevance to Erasmian piety, has been a somewhat contentious historiographical issue. This thesis examines that relationship, and asserts that the Devotio Moderna was a crucial formative aspect of Erasmus' religiosity. However, its relevance ought not be overstated, due to the humanist's significant developments away from his spiritual forerunners.

Beneficial consumer outcomes are most likely when behavior-analytic interventions are implemented with high procedural fidelity (i.e., degree to which the procedure is implemented as intended). Video self-monitoring, which involves teaching staff members to monitor their own procedural fidelity when watching recordings of themselves, can be used to improve and maintain high procedural fidelity, but video self-monitoring requires additional staff time and resources. In-vivo self-monitoring, which involves monitoring procedural fidelity during or immediately following implementing a behavior-analytic intervention, could be a cost-effective option. However, in-vivo self-monitoring needs additional research to understand its effects on procedural fidelity. This current study analyzed the effects of in-vivo self-monitoring on the procedural fidelity of three behavior technicians implementing discrete trial instruction with children with autism. We used a nonconcurrent multiple baseline across participants design to teach participants how to score their procedural fidelity during their discrete trial instruction session. Data suggested that in-vivo self-monitoring was effective for two out of three participants, and those two participants were more likely to be accurate in their self-scored procedural fidelity. Procedural fidelity for the third participant did not increase with in-vivo or video self-monitoring, and the third participant was less likely to be accurate in their self-scored procedural …

It is generally accepted among scholars that increases in descriptive representation result in increases in substantive representation. Although women's descriptive representation has increased in recent years, women are still underrepresented in politics. One reason for women's underrepresentation is that female candidates must overcome additional barriers in order to get elected, including on the low number of women in the pipeline to elected office, party gatekeeping, women's lower levels of political ambition, and voters' negative gender stereotypes about female candidates. Changes in women's descriptive representation and recent salience of women-friendly policies, such as abortion and paid maternity leave, has caused me to investigate whether implementation of these women-friendly policies result in an increase in women's descriptive representation. I assert that women-friendly policies reduce the barriers women must overcome to get elected to office. Specifically, the presence of more women-friendly abortion and paid maternity leave policies will result in an increase in women's descriptive representation at the state level. I find partial support for a relationship between these women-friendly policies and higher levels of women's descriptive representation. State-level abortion protections are associated with higher levels of women's descriptive representation in the state legislature.

The third volume of A.B. Marx's theory treatise Die Lehre von der musikalischen Komposition is discussed. His definitions of rondo and sonata formal types are demonstrated in the first chapter in addition to the manner of their derivation through a developmental process originating in the Liedform. Musical examples chosen by Marx are examined in chapter two. These examples, taken from Mozart's and Beethoven's piano works, are evaluated in relation to Marx's definitions of the various types of form. The third chapter is concerned with the progression from microstructure to macrostructure and the functional interrelation of the parts to the whole. In addition, Marx's opinion on musical form is compared with perspectives of philosophers from his time period and the immediate past.