4353 research outputs found
Sort by
Kinetics of H\u3csub\u3e2\u3c/sub\u3e Adsorption at the Metal–Support Interface of Au/TiO\u3csub\u3e2\u3c/sub\u3e Catalysts Probed by Broad Background IR Absorbance
No full textH2 adsorption on Au catalysts is weak and reversible, making it difficult to quantitatively study. We demonstrate H2 adsorption on Au/TiO2 catalysts results in electron transfer to the support, inducing shifts in the FTIR background. This broad background absorbance (BBA) signal is used to quantify H2 adsorption; adsorption equilibrium constants are comparable to volumetric adsorption measurements. H2 adsorption kinetics measured with the BBA show a lower Eapp value (23 kJ mol−1) for H2 adsorption than previously reported from proxy H/D exchange (33 kJ mol−1). We also identify a previously unreported H-O-H bending vibration associated with proton adsorption on electronically distinct Ti-OH metal-support interface sites, providing new insight into the nature and dynamics of H2 adsorption at the Au/TiO2 interface
Biofilm Viscoelasticity and Nutrient Source Location Control Biofilm Growth Rate, Migration Rate, and Morphology in Shear Flow
Get PDFWe present a numerical model to simulate the growth and deformation of a viscoelastic biofilm in shear flow under different nutrient conditions. The mechanical interaction between the biofilm and the fluid is computed using the Immersed Boundary Method with viscoelastic parameters determined a priori from measurements reported in the literature. Biofilm growth occurs at the biofilm-fluid interface by a stochastic rule that depends on the local nutrient concentration. We compare the growth, migration, and morphology of viscoelastic biofilms with a common relaxation time of 18 min over the range of elastic moduli 10–1000 Pa in different nearby nutrient source configurations. Simulations with shear flow and an upstream or a downstream nutrient source indicate that soft biofilms grow more if nutrients are downstream and stiff biofilms grow more if nutrients are upstream. Also, soft biofilms migrate faster than stiff biofilms toward a downstream nutrient source, and although stiff biofilms migrate toward an upstream nutrient source, soft biofilms do not. Simulations without nutrients show that on the time scale of several hours, soft biofilms develop irregular structures at the biofilm-fluid interface, but stiff biofilms deform little. Our results agree with the biophysical principle that biofilms can adapt to their mechanical and chemical environment by modulating their viscoelastic properties. We also compare the behavior of a purely elastic biofilm to a viscoelastic biofilm with the same elastic modulus of 50 Pa. We find that the elastic biofilm underestimates growth rates and downstream migration rates if the nutrient source is downstream, and it overestimates growth rates and upstream migration rates if the nutrient source is upstream. Future modeling can use our comparison to identify errors that can occur by simulating biofilms as purely elastic structures
Sexual Trauma Uniquely Associated with Eating Disorders: A Replication Study
No full textObjective: Extensive research supports the contention that trauma exposure is a nonspecific risk factor for the development of eating disorders (EDs). Limited research has investigated the relative association of diverse types of traumatic events with EDs in the same statistical model. In a recent exception, Breland et al. (2018) found that only sexual trauma predicted ED pathology among female veterans when both sexual trauma and combat exposure were examined simultaneously, even though combat exposure alone had been previously identified as an ED risk factor. Given the current replication crisis in psychology, it is important to investigate if this finding replicates in different populations. This study investigated whether results from Breland et al. (2018) would (a) replicate in a distinct population (i.e., participants living with food insecurity) and (b) hold when 3 additional traumatic events were included in the statistical model. Method: We hypothesized that self-reported sexual trauma would be uniquely associated with ED pathology as compared to combat exposure, wreck/crash/accident, serious body-related accident, and life-threatening illness or injury. Results: Using a cross-sectional logistic regression model, sexual trauma was the only independent predictor of EDs in the model, thus replicating the findings of Breland et al. (2018) in a different population. Conclusion: Findings highlight the importance of (a) investigating multiple traumatic events in the same statistical models and (b) careful screening of traumatic events in patients presenting with EDs
What We Ought to Say: An Appropriation of \u3cem\u3eKing Lear\u3c/em\u3e
No full textA critical analysis and creative appropriation of King Lear into a modern short story. What We Ought to Say presents Lear as Mr. Le, a Vietnamese immigrant who came to the United States after the Vietnam War with his wife and daughters. By the time the story begins, Le has amassed a large fortune transforming an empty lot into a popular Asian shopping center. But while he is financially successful, his personal life and family relationships are strained and dysfunctional. When Le slips in the bathtub, his life begins falling apart
Reorienting the Orient: An Examination of Asian Influence on the Intercultural Theatre
Get PDFThis thesis explores the intercultural theatre by examining how Asian theatre traditions influenced European theatre directors in the twentieth century. It also applies discussions of the intercultural theatre to a contemporary, sociological context by investigating the development of the Asian American theatre
Interpersonal Relationships and the Self-Concept
No full textThis volume provides an overview of the theoretical and empirical work on relationship-induced self-concept change that has occurred over the last 10-15 years. The chapters in this volume discuss the foundations of relationship self-change, how and when it occurs, how it influences relationship decisions and behavior, and how it informs and modifies subsequent knowledge structures, all examined over the course of the relationship cycle (i.e., initiation, maintenance, and dissolution). Additionally, this volume identifies novel applications and extensions of the relationship self-change literature, including applications to health and behavior, intergroup relations, and the workplace.
Among the topics discussed: Self-disclosure in the acquaintance process Commitment readiness Bolstering attachment security through close relationships Self-concept clarity and self-change The role of social support in promoting self-development Relationship dissolution and self-concept change Intergroup and sociocultural factors of self-expansion Self-concept change at work Measurement of relationship-induced self-concept change
Interpersonal Relationships and the Self-Concept serves both as a comprehensive overview of the existing empirical research as well as a roadmap for future research on self-change, including a discussion of emerging theoretical frameworks. It will interest researchers focusing on romantic relationships, self and identity, and the intersection of self and relationships, spanning the disciplines of psychology, sociology, communication, and family studies.https://digitalcommons.trinity.edu/mono/1153/thumbnail.jp
Pasajero de la Literatura (1944-2000): Antonio Fernández Spencer
No full textLos trabajos de Antonio Fernández Spencer (1922-1999) reunidos en a Pasajeros de la literatura fueron publicados entre 1944 y 2000: medio siglo de sostenida escritura y penetrantes indagaciones en torno a la poesía, sin desdeñar la disquisición filosófica o histórica. Con su diversidad de formatos el reconocido poeta y ensayista realiza un largo inventario de la poesía y el pensamiento, dominicano y contemporáneo. De Fernández Spencer ya hemos publicado en Ediciones Cielonaranja A orillas del filosofar, Ensayos sobre historia y letras dominicanas y El gallo y la veleta. [Ensayos últimos]. Esta edición ha sido realizada por el Dr. Carlos X. Ardavín Trabanco, crítico y profesor de literatura española en la Universidad de Trinity, San Antonio, Tejas; autor de una serie de libros entre los que se destacan La pasión meditabunda, La torre de los panoramas y Diccionario personal de literatura dominicana.https://digitalcommons.trinity.edu/mono/1154/thumbnail.jp
A Very English Revolution: The Impacts of Co-Residence at the University of Oxford
No full textThis paper examines the impacts of co-residence (admitting women to men’s colleges and men to women’s colleges) at the University of Oxford beginning in the 1970s. Co-residence increased the representation of women undergraduates at Oxford to near parity with men; the representation of women in academic positions rose but not as substantially as that of women undergraduates and postgraduates and today women comprise still only a third of academics in the colleges of the university; the fellowships of the former female colleges became genuinely mixed, the fellowships of the former male colleges more slowly; women are less likely to be appointed head of a former men’s college than are men to be appointed head of a former women’s college; the quality of Oxford undergraduates rose with the increased number of female undergraduates; and the quality of undergraduates in the former male colleges rose at the expense of the female colleges
Moving Forward: The Role of Reflection in Planning Literacy Instruction
No full textHow are all the essential components of literacy and the features of effective instruction integrated into a comprehensive instructional plan? If you feel overwhelmed, this chapter may help alleviate your concerns. Sample daily and weekly lesson plans created by effective, experienced teachers are shared. Ideas to ensure time for small-group targeted instruction and multiple opportunities for students to practice their new skills are provided. Most important, you will learn how to reflect on your teaching and the achievement of your students to adjust your instruction to be more effective. This chapter shows you how to put it all together
