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Microwave-Assisted Topochemical Manipulation of Layered Oxide Perovskites: From Inorganic Layered Oxides to Inorganic-Organic Hybrid Perovskites and Functionalized Metal-Oxide Nanosheets
Get PDFDeveloping new materials with desired properties is a vital component of emerging technologies. Functional hybrid compounds make an important class of advanced materials that let us synergistically utilize the key features of the organic and inorganic counterparts in a single composite, providing a very strong tool to develop new materials with ”engineered” properties. The research presented here, summarizes efforts in the development of facile and efficient methods for the fabrication of three- and two-dimensional inorganic-organic hybrids based on layered oxide perovskites. Microwave radiation was exploited to rapidly fabricate and modify new and known materials. Despite the extensive utilization of microwaves in organic syntheses as well as the fabrication of the inorganic solids, the work herein was among the first reported that used microwaves in topochemical modification of the layered oxide perovskites. Our group specifically was the first to perform rapid microwave-assisted reactions in all of the modification steps including proton exchange, grafting, intercalation, and exfoliation, which decreased the duration of multi-step modification procedures from weeks to only a few hours. Microwave-assisted grafting and intercalation reactions with n-alkyl alcohols and n-alkylamines, respectively, were successfully applied on double-layered Dion-Jacobson and Ruddlesden-Popper phases (HLaNb2O7, HPrNb2O7, and H2CaTa2O7), and with somewhat more limited reactivity, applied to triple-layered perovskites (HCa2Nb3O10 and H2La2Ti3O10). Performing neutron diffraction on n-propoxy-LaNb2O7, structure refinement of a layered hybrid oxide perovskite was then tried for the first time. Furthermore, two-dimensional hybrid oxides were efficiently prepared from HLnNb2O7 (Ln = La, Pr), HCa2Nb3O10, HCa2Nb2FeO9, and HLaCaNb2MnO10, employing facile microwave-assisted exfoliation and post-exfoliation surface-modification reactions for the first time. A variety of surface groups, saturated or unsaturated linear and cyclic organics, were successfully anchored onto these oxide nanosheets. Properties of various functionalized metal-oxide nanosheets, as well as the polymerization of some monomer-grafted nanosheets, were then investigated for the two-dimensional hybrid systems
A Computational Fluid Dynamics Study on Bidirectional Glenn Shunt Flow with an Additional Pulsatile Flow Through a modified Blalock-Taussig Shunt
Get PDFThe blood flow through the Bidirectional Glenn shunt (BGS) and modified Blalock-Taussig shunt (mBTS) to the pulmonary arteries (PAs) was analyzed using Computational Fluid Dynamics. This study consisted of the steady and pulsatile cases. In case one, the results of blood flow through the BGS for the Newtonian and non-Newtonian viscosity models were compared. Case two focused on having an additional pulsatile blood flow through the mBTS using the non-Newtonian Carreau viscosity model. The geometries were created based on the angiograms. In case one, boundary conditions to be specified at the inlets were obtained from the flow rate measurements via Doppler flow studies in children and young adults. The averaged velocities were obtained from these flow rates and specified as parabolic velocity profiles at the inlets. The average PA pressures were obtained from the catheterization data and specified at the branches of the PA outlets. In case two, boundary conditions at the same inlets were constant during the cardiac cycle. The pulsatile PA and aortic pressure tracings obtained from the catheterization data were specified at the outlets and mBTS inlet, respectively. A comparison is made between the first and second case results
Dwight D. Eisenhower and the Politics of Anti-Communism at Columbia University: Anti-Intellectualism and the Cold War during the General\u27s Columbia Presidency
Get PDFDwight D. Eisenhower has been criticized as an anti-intellectual by scholars such as Richard Hofstadter. Eisenhower’s tenure as president of Columbia University was one segment of his career he was particularly criticized for because of his non-traditional approach to education there. This paper examines Eisenhower’s time at Columbia to explain how anti-intellectualism played into his university administration. It explains how his personality and general outlook came to clash with the intellectual environment of Columbia especially in the wake of the faculty revolt against former Columbia President Nicholas Murray Butler. It argues that Eisenhower utilized the Columbia institution to promote a Cold War educational agenda, which often belittled Columbia intellectuals and their scholarly pursuits. However, this paper also counter-argues that Eisenhower, despite accusations of anti-intellectualism, was an academically interested man who never engaged in true suppression of free thought despite pressure from McCarthyite influences in American government, media and business
Manipulated Museum History and Silenced Memories of Aggression: Historical Revisionism and Japanese Government Censorship of Peace Museums
Get PDFThe Japanese government has a vested interest in either avoiding discussion of its war-torn past or arguing for a revisionist take. The need to play up Japanese victimization over Japanese aggression during World War II has led to many museums having their exhibits censored or revised to fit this narrative goal. During the 1990’s, Japan’s national discourse was more open to discussions of war crimes and the damage caused by their aggression. This in turn led to the creation of many “peace museums” that are intended to discuss and confront this history as frankly as possible. At the beginning of the 21st century, public discourse turned against these museums and only private museums have avoided censorship. Some museums, like the Osaka International Peace Center, have been devastated by the censorship. This museum and other museums with similar narrative issues raise questions about appropriate narrative on display. What is appropriate to censor for the sake of respect for the dead? What must be included for the sake of historical accuracy and honesty about the past? These questions are investigated at four different peace museums throughout Japan
Following the Spirit of the Law: Col. Eberhard P. Deutsch and the Legal Division of United States Forces Austria, 1945-1946
Get PDFAs World War II neared its end in Europe, the Allied powers faced a difficult situation with the occupied nation of Austria. Considering the complicated Austrian relationship with Nazism, the Allies had to decide how the nation would be liberated, occupied, and rehabilitated. Almost instantaneously, the United States, Great Britain, and France became at odds with a vengeful Soviet Union seeking to build a defensive shield of Communist European client states that included Austria. This study will show that as the head of the American Legal Division, Col. Eberhard P. Deutsch, United States Army, was instrumental in the reformation of occupied Austria’s legal system. It will also address the alleged role he played in the modification of the Second Control Agreement of 1946, the summer quadripartite conference that allowed the Austrian government greater opportunities for self-determination
Examining the Impact of Sexual Orientation on the Career Development of LGBQ+ Students
Get PDFCollege is a significant stage that heavily contributes to who and what citizens become after degree attainment. During career development, college students’ interests develop through taking part in coursework and employment based occupational exploration. It has been speculated that because sexual identity development and vocational identity development are active during the same phase of life, these processes might exert influence on each other (Chen, Stacuzzi, Ruckdeschel, 2004; Fassinger, 1996; Morrow, 1997). With the changing socioeconomic climate over the past decade, individuals of varying sexual orientation identities have found it necessary or desirable to be more open regarding their identity in their career. Currently, a lack of research exists that examines LGBQ+ students’ career development (Datti, 2009; Degges-White & Shoffner, 2002; Chung, 1995; Morrow, 1997; Schneider & Dimito, 2010).
The purpose of this research study was to examine the career development of LGBQ+ students. Through a qualitative, phenomenological approach utilizing nine participants, the researcher examined how a LGBQ+ sexual orientation impacts a student’s career development. Four themes emerged from the study: the participant coming out process, awareness of intersectionality of identities, navigating their career as an LGBQ+ individual, identifying potential employers, and the role of career counselors. Recommendations are shared to further support LGBQ+ individuals in their career development. As a result of this study, leaders in post-secondary education as well as policymakers are able to gain insight into the career development of this population
Mom\u27s Photoshoot
Get PDFThis is a semi-autobiographical script about the author, Eric Hollerbach. It analyzes how problems with his mother manifest into problems with his romantic relationships
