1579 matches in the database.
These are records: 1 - 30.
[1] [2] [3] [4] [5] … [53]
1.
CABALFIN, EDSON ROY GREGORIO.
ART DECO FILIPINO: POWER, POLITICS AND IDEOLOGY IN PHILIPPINE ART DECO ARCHITECTURES (1928-1941).
Degree: MS ARCH, Design, Architecture, Art, and Planning : Architecture, 2003, University of Cincinnati
► This research argues that the Art Deco style in the Philippines can…
(more)
▼ This research argues that the Art Deco style in the Philippines can be understood both as the imposition of power by the colonizer and the demonstration of resistance of the colonized. The study also proposes that the style can never be neutral, innocent or inert, rather can be embedded within intricacies of ideological practices and political processes. Scholarship on Art Deco architecture outside Europe and the Americas, especially in the Philippines, has remained uncritical as these were often limited to formalistic analysis. Using postcolonial theory, the critical historiography on Philippine Art Deco is to be investigated in terms of three critical categories of mode of production, representation and power. First, mode of production, shows how Art Deco was connected and dependent on the relationship between producers and consumers of the style. The interaction of materials, technologies of construction, patronage, institutions and cultural agents were highlighted in this chapter. Second, representation, explores how Art Deco became the technology of refashioning and re-presenting the different realities. The form, typologies, variants of the architectural style are dissected and problematized according to the politics of representation; Third focuses on power, or the dynamics between the dominated-subjugated and colonizer-colonized. This section established the linkage between the political, economic and social colonial programs and its manifestations in the built form of that period. Furthermore, modes of resistances and empowerment were identified and probed in relation to the power dynamics.
Advisors/Committee Members: Snadon, Patrick.
Subjects: Architecture
Keywords: architecture - Philippines - 20th Century; Art Deco; Philippine-American relations; architecture historiography; Postcolonial theory - architecture
More Like This
3.
CABOVSKA, BAIBA.
INVESTIGATIONS OF SEPARATION MECHANISMS IN CAPILLARY ELECTROPHORESIS AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHY.
Degree: PhD, Arts and Sciences : Chemistry, 2003, University of Cincinnati
► In the beginning of this work, the applications of ionic liquids to…
(more)
▼ In the beginning of this work, the applications of ionic liquids to chromatography and capillary electrophoresis are reviewed. This review discusses the interactions ionic liquids provide in the retention and separation of various analytes. The use of ionic liquids is further encompassed in Chapters 2, 3 and 4. Aqueous capillary electrophoretic studies were performed to investigate interactions between halophenols and 1-ethyl-3-methylimidazolium tetrafluoroborate or tetraethylammonium tetrafluoroborate electrolytes. In both cases, the impact of halogen size and place of substitution was investigated. Investigating the interactions between halophenols and ionic liquids by NMR, the NMR results indicated hydrophobic stacking interactions between the iodophenols and possible similar interaction among phenols and imidazolium. Following the CE studies, the applications of ionic liquids to HPLC were also investigated. Two different alkylimidazoles were attached to silica support and the effect of organic modifier, pH and ionic strength on retention was examined. The imidazolium based stationary phase was compared with a reversed phase column, which incorporated only alkylbromide as the functional group. The analytes selected allowed differentiation between reversed phase and ion-exchange phase behavior on the stationary phases. In Chapter 5, the separation of cocaine stereoisomers and metabolites was investigated. The effect of methanol and acetonitrile as organic modifiers and the effect of different concentrations of sulfated cyclodextrin on the resolution and migration times of the analytes were investigated. A reproducible method for the separation of cocaine stereoisomers was developed.
Advisors/Committee Members: Stalcup, Dr. Apryll M.
Subjects: Chemistry, Analytical
Keywords: ionic liquids; cocaine; Halophenols
More Like This
4.
Cabral, Kyle H. K.
PROXIMAL STRESS PROCESSES AS PREDICTORS OF ALCOHOL USE IN GAY AND BISEXUAL MALES: A PARTIAL TEST OF THE MINORITY STRESS THEORY.
Degree: Master of Arts (MA), Psychology, 2007, Bowling Green State University
► Research has shown that gay and bisexual males use alcohol in higher…
(more)
▼ Research has shown that gay and bisexual males use alcohol in higher quantities and more frequently than their heterosexual counterparts. In this study, I examined the relationship between sexual identity (internalized homonegativity and gay identity formation) and the quantity and frequency of alcohol use, drinking-related consequences, and drinking-related outcome expectancies in gay and bisexual males. I recruited two samples (n1 = 529; n2 = 337) via the World-Wide-Web who completed my survey online. Participants in both samples who reported a more integrated gay identity also reported less internalized homonegativity. In the second sample, there was a small but consistent relationship between internalized homonegativity, quantity and frequency of alcohol use and drinking related consequences. There was no relationship between gay identity formation and any of the drinking outcome variables. None of the sexual identity variables explained more than 10% of the variance in alcohol-related behaviors. Although the methods of this project attempted to address some of the limitations of previous research by using a larger sample size, using more than one measure of internalized homonegativity, and attempting to recruit a demographically diverse sample, my results are similar to previous results. Future directions for research include recruiting a wider range of problem and non-problem drinkers, more subjects in the lower stages of gay identity development, and subjects who are less educated, older, lower income, and from a variety of ethnic backgrounds.
Advisors/Committee Members: Rosenberg, Harold.
Keywords: Gay and Bisexual Males; Alcohol Use; Drinking Behavior; Alcohol Expectancies; Alcohol Consequences; Internalized Homonegativity; Gay Identity Development; Gay Identity Formation; Gay Identity
More Like This
5.
Cabrera, Marco Eugenio.
Identification, modeling, and analysis of the dynamics of lactate and oxygen uptake during exercise in man.
Degree: Doctor of Philosophy, Biomedical Engineering, 1995, Case Western Reserve University
► In this study, the human bioenergetic system is identified and then modeled…
(more)
▼ In this study, the human bioenergetic system is identified and then modeled to relate cellular metabolism to whole-body responses during hypoxia and exercise. First, the dynamic characteristics of the physiological system are investigated using system identification methods. A time series model of the lactate concentration (LA) and oxygen uptake (VO2) response to incremental changes in work rate was fitted to simulated and experimental data. Time-varying system response parameters were determined and then examined. Two major transitions in the parameters were found to occur, at intensity levels equivalent to 53 ± 8% VO2max and 77 ± 9% VO2max. These changes in the parameters indicate that the best linear dynamic model that fits the observed system behavior has changed. The identified parameter changes over time suggest that the exercise intensity range (from rest to VO2max) is divided into three main intensity domains, each with distinct dynamics. Secondly, we developed a mathematical model of human bioenergetics that links cellular metabolism to whole-body responses. Our aim is to examine and quantify the mechanisms that control LA accumulation when O2 avail ability to the muscle is lowered. The model equations, which are based on dynamic mass balances for glycogen, glucose, pyruvate, LA, O2, and CO2, were solved numerically to simulate the system responses to hypoxia. The simulations predict (a) the substrate concentration changes in muscle, splanchnic bed, and other tissues, and (b) changes in other metabolites whose reactions are coupled to the main reactions processes. System responses to simulated respiratory and circulatory hypoxia were examined and compared to experimental data. Model simulations closely predicted the pattern of change in substrates and control metabolites to that from experimental data. A large decrease can occur in muscle O2 concentration without affecting muscle respiration. Only one-third of the increase in LA production can be attributed to changes in redox state (NADH/NAD).Thirdly, we extended the mathematical model to incorporate changes in metabolic rate. Our aim was to examine and quantify the mechanisms that control LA accumulation when the muscle O2 concentration is lowered with moderate exercise. Model simulations of system responses to exercise predict (a) the substrate concentration changes in muscle, splanchnic bed, and other tissues, and (b) changes in other metabolites whose reactions are coupled to the main reactions processes. System responses to a step change in metabolic rate were simulated, examined, and compared to experimental data. Model simulations closely predicted the pattern of change in substrates and control metabolites to that from experimental data. A large decrease can occur in muscle O2 concentration without affecting muscle respiration. Redox state decreased to 50% its initial value during exercise. With exercise initiation, LA increased abruptly, most likely as a result of a concurrent increase in pyruvate due to the sudden stimulation of glycolysis induced by the sharp rise in phosphorylation state. Therefore, during moderate exercise, (a) there are appropriate levels of oxyge nation at the tissue level even during the transient state, and (b) the observed increase in LA concentrations in the muscle and arterial blood are mainly due to the sudden increase in the glycolytic rate. (Abstract shortened by UMI)
Advisors/Committee Members: Saidel, Gerald M.
Subjects: Engineering, Biomedical
Keywords: Exercise, lactate and oxygen uptake
More Like This
6.
Cabrera Rios, Mauricio.
MULTIPLE CRITERIA OPTIMIZATION STUDIES IN REACTIVE IN-MOLD COATING.
Degree: Doctor of Philosophy, Industrial and Systems Engineering, 2002, Ohio State University
► Reactive in-mold coating (IMC) products have been used successfully for many years…
(more)
▼ Reactive in-mold coating (IMC) products have been used successfully for many years to improve the surface quality of Sheet Molding Compound (SMC) compression molded parts. IMC provides a smooth, sealed surface, used as a conductive or nonconductive primer for subsequent painting operations. The success of IMC for SMC parts has recently attracted the interest of thermoplastic injection molders. The potential environmental and economic benefits of using IMC as a primer and, in the ideal case, to replace painting completely are large. Acceptance of IMC as a competitor to the traditional painting processes will depend upon the improvement of its ability to deliver in-mold coated parts in short cycle times at the highest possible quality level. Most optimization studies in Reactive Polymer Processing involve compromising between different performance measures since, frequently, the controllable variables have conflicting effects on these measures. IMC is not the exception to the rule. The performance measures need to be balanced, each against the other, in order to obtain the best compromises. The goal of this research work is to develop an optimization strategy for the application of reactive in-mold coating to SMC and thermoplastic parts in presence of multiple and conflicting performance measures. To achieve this goal we explore the use of Artificial Neural Networks as metamodeling techniques and the use of Data Envelopment Analysis to solve multiple criteria optimization problems.
Advisors/Committee Members: Castro, Jose M.
Keywords: In-Mold Coating; Multiple Criteria Optimization; Artificial Neural Networks; Data Envelopment Analysis; Reactive Polymer Processing
More Like This
7.
Caccia, Lewis E. Jr.
Risk Communication in the Workplace: An Analysis of Communication Toolkits as Rhetorical Practice.
Degree: PHD, College of Arts and Sciences / Department of English, 2009, Kent State University
► This dissertation focuses on rhetorical practices in occupational risk communication. Risk communication…
(more)
▼ This dissertation focuses on rhetorical practices in occupational risk communication. Risk communication is the exchange of information and perspectives relating to issues of uncertain harm or loss. Accordingly, occupational risk communication restricts such exchange and provision to issues concerning the workplace. The study examines the Communications Toolkits written at a Fortune 500 automotive manufacturing plant. The Toolkits are a weekly document written by the plant’s Safety Department for the purpose of teaching employees to avoid injuries that may result in lost work days. More specifically, this study develops systematically-derived taxonomies of written discourse based on Aristotle’s taxonomy of enthymemes and topoi, as discussed in his Rhetoric. This taxonomy is then applied to the Communications Toolkits to determine the topoi used and the extent to which they occur among the enthymemes found in the documents. In so doing, the examination observes and analyzes the manner by which the Communications Toolkits complicate existing representations of risk communication and, more specifically, occupational risk communication. By assessing qualities of the Toolkits, the study suggests that a sub-discipline of the field exists that may be more narrowly distinguished as safety communication. This study finds that the Toolkits are comprised of topoi that deliberate about future safety and praise current actions rather than analyzing past problems. Thus, safety and risk differ in substantive ways: safety communication looks at preventing future harm and affirming community values whereas risk communication assesses posited future harm and either remedies or measures past harm. Future work must more carefully ascribe and delineate how arguments are constructed in the safety communication subfield and to what end within the larger scope of occupational risk communication.
Advisors/Committee Members: Newman, Sara J.
Subjects: American studies; Communication; Health; Labor economics; Labor relations; Literacy; Occupational safety
Keywords: Labor Relations, Workplace; Risk Communication; Occupational Safety; Safety Communication; Enthymemes; Literacy; Rhetoric; Communications Toolkits; Toolkits; topoi
More Like This
8.
Cacciapaglia, Holly M.
A STEPPED-CARE APPROACH to SMOKING CESSATION and HARM REDUCTION.
Degree: Doctor of Philosophy (Ph.D.), Psychology/Clinical, 2006, Bowling Green State University
► Smoking is the most preventable cause of death in the US (American…
(more)
▼ Smoking is the most preventable cause of death in the US (American Cancer Society, 2004). Despite a significant public health need for effective cessation interventions, the efficacy of smoking cessation interventions has declined over the past 15 years (Piasecki and Baker, 2001; Irvin and Brandon, 2000). The purpose of this study was to examine a stepped-care approach to smoking cessation and harm reduction. Stepped-care has been proposed as a promising, yet relatively unexplored approach to smoking cessation (Piasecki and Baker, 2001). In a stepped-care program, participants who are not responding therapeutically to the current level of treatment (i.e. experience significant difficulties or failure) are stepped-up to a more intensive form of treatment. In this study, individual problem solving therapy (PST) was used as the stepped-care component. The participants in this study were 40 smokers from the community. While all participants were engaged in an 8-session cognitive-behavioral group smoking cessation program, half of the participants were eligible to be stepped-up to individual PST when they experienced difficulties meeting their smoking reduction goals. Alternative measures of success (i.e., harm reduction) included progression along the stages of change model as measured by the Stages of Change Algorithm, Processes of Change Inventory, Decisional Balance Inventory, Self-Efficacy/Temptation Inventory, and the Self-Efficacy Questionnaire (SEQ-12), as well as reductions in nicotine exposure and the ability to achieve a 24-hour quit attempts. Results revealed that 56% of all participants were able to quit by the end of the intervention and participants made significant progress along the stages of change as measured by the processes of change and self-efficacy. Participants were also able to achieve significant reductions in nicotine exposure and an increase in 24-hour quit attempts. No significant differences were found between the treatment and control groups or the treatment group participants who received PST (Treatment + PST) and those matched on stepped-care eligibility in the control group (Control + PST eligible). Despite the lack of significant findings, effect size estimates revealed a moderate to large effect size for self-efficacy/temptation, achieving a 24-hour quit attempt, and abstinence in favor of the treatment group. Implications and future directions are discussed.
Advisors/Committee Members: Carels, Robert A.
Subjects: Psychology, Clinical
Keywords: smoking cessation; harm reduction; tobacco; stepped-care; intervention
More Like This
9.
CACHO RIVERO, JESUS ANDRES.
ANAEROBIC DIGESTION OF EXCESS MUNICIPAL SLUDGE: OPTIMIZATION FOR INCREASED SOLID DESTRUCTION.
Degree: PhD, Engineering : Environmental Science, 2005, University of Cincinnati
► Anaerobic digestion is an economically viable and environmentally friendly process for the…
(more)
▼ Anaerobic digestion is an economically viable and environmentally friendly process for the reduction of excess municipals sludge. Primary and activated sludge are generated during wastewater treatment. The production of sludge is increasing worldwide and anaerobic digestion presents limitations in terms of solid destruction and long SRT requirements. This study investigates two major aspects of the anaerobic digestion of excess municipal sludge. First the effect of sludge retention time (SRT) on the performance of the anaerobic digestion process was evaluated. Four different SRTs (5, 10, 20 and 40 days) were used in triplicate. The process showed stability and reproducibility throughout the experimental period. Solid destruction was a function of SRT, increasing as the SRT increased. It was modeled as a first order reaction considering the digester as a plug-flow reactor with recycle. The maximum solid destruction achieved in the anaerobic digestion of a mixture of primary and WAS was 55.3% and the first order reaction constant 0.38d-1. The effect of SRT on other effluent quality parameters was also studied. Increasing SRT decreased fecal coliforms density, although only class B biosolids were achieved in all cases. Once the effect of SRT and the limit in solid destruction of anaerobic digestion were determined, the second part of the study investigated a technology that would enhance solid destruction during the anaerobic process. A thermo-oxidative treatment using hydrogen peroxide as oxidant and temperatures below the boiling point of water was evaluated. Several reactor configurations and SRTs were considered as determinant factors in the process performance. Results showed that solid destruction increased as hydrogen peroxide and temperature increased. Higher stability, versatility and effluent quality were observed for the two stage configuration compared to the single stage configuration for the same overall SRT. Increasing SRT increased stability and improved effluent quality. The best cost effective configuration was a two stage configuration with reactors operated at 5 days SRT and thermo-oxidative treatment operated at 90°C and a dosage of 1.0 g H2O2/g VSSinfluent. A VSS removal of 75.7% was achieved with this configuration, which represents a 36.9% increase when compared to the maximum determined for conventional anaerobic digestion of the sludge mixture. This configuration showed eventually complete fecal coliforms removal thus achieving class A biosolids. Anaerobic digestion performance of municipal sludge was significantly enhanced when combined with thermo-oxidative treatment. However this technology can be economically prohibitive due to chemical addition. Further research should take into account a balance between performance enhancement and economic cost.
Advisors/Committee Members: Suidan, Dr. Makram T.
Subjects: Engineering, Environmental
Keywords: Anaerobic Digestion,Excess Municipal Sludge, Thermo-oxidative Treatment, Hydrogen Peroxide
More Like This
11.
Caddy, Scott A.
(Mis)appropriating (Con)text: Jane Austen's Mansfield Park in Contemporary Literary Criticism and Film.
Degree: Master of Arts (MA), English/Literature, 2009, Bowling Green State University
► In this thesis, the critical tradition of Jane Austen’s novel Mansfield Park…
(more)
▼ In this thesis, the critical tradition of Jane Austen’s novel Mansfield Park (1814), the historical context of the novel, and a contemporary film adaptation are re-examined. The film in question is Patricia Rozema’s 1999 adaptation, entitled Mansfield Park. In Chapter I, the critical tradition of the novel is examined in order to determine what consensus, if anything, scholars have come to in regards to an accepted reading of the novel. By examining this criticism a historical context unique to the novel is uncovered. In Chapter II, Austen’s personal letters and contemporary authors are scrutinized in terms of the debate over abolition at the time. Because most scholars of the novel see slavery as an important or central theme in the novel, the historical context becomes integral to any reading of the novel; it also becomes intrinsic to any adaptation of the novel into film. Chapter III uses the arguments outlined in Chapter’s I and II to re-evaluate Rozema’s Mansfield Park to revitalize and reinterpret the debate over Austen (as an author and person) in regards to any critical tradition of her works. Overall, this thesis examines how the criticism of the novel and/or film has become a battle over who Jane Austen is, was, and what kinds of political sentiments she had. Focus has been taken off the text(s), resulting in a critical tradition more concerned with control over critical readings instead of discourse over meanings and interpretations of Mansfield Park.
Advisors/Committee Members: Lapinksi, Piya.
Subjects: English literature; History; Literature
Keywords: Jane Austen; Mansfield Park; adaptation; Patricia Rozema; film
More Like This
12.
Cade, Justin A.
"Frozen Conflict" in Paradise: Origins of the Struggle for Abkhazia.
Degree: Master of Arts, Slavic and East European Studies, 2009, Ohio State University
► “’Frozen Conflict’ in Paradise: Origins of the Struggle for Abkhazia” examines the…
(more)
▼ “’Frozen Conflict’ in Paradise: Origins of the Struggle for Abkhazia” examines the question of separatism in Abkhazia, a breakaway republic of Georgia. Paying particular attention to the role of Georgia and Russia in shaping the fate of Abkhazia, this Master’s thesis is concerned with identifying the origins of the now “frozen conflict” which now exists in the autonomous republic, which scholars have described as being in a state of constitutional limbo. In offering an explanation for how a series of diplomatic failures led to the outbreak of war following the fall of the Soviet Union, the thesis places particular emphasis on five critical themes in the history of Abkhazia. They are as follows: demographic shift in the republic; the legitimate, yet conflicting, interests of the Russians, Georgians, and Abkhaz in the republic and how the triangular nature of the relationship between these three parties; competing or overlapping claims to Abkhaz territory; the question of nationalism; and the importance of specific events and personalities. The thesis is divided into five distinct chapters to offer readers a basic background in Abkhaz history and to highlight key events and personalities in the region’s past. The first chapter is concerned with the ancient and pre-Russian history of Abkhazia and Georgia; the second chapter focuses on Transcaucasia under the Russian Empire and Georgia’s brief period of independence from Russia in the early twentieth century; the third chapter is a narrative of the region in the Soviet period; the fourth chapter examines the post-Soviet period and the outbreak and consequences of the 1992-93 war in Abkhazia; and, finally, the fifth chapter follows post-war Abkhaz, Georgian, and Russian relations, culminating in the August 2008 war fought between the Georgians and Russians over South Ossetia.
Advisors/Committee Members: Breyfogle, Nicholas.
Subjects: History
Keywords: Abkhazia; Georgia
More Like This
13.
Ca, Diep Vu.
NANOSTRUCTURED ASSEMBLIES FOR SOLID PHASE EXTRACTION OF METAL IONS.
Degree: Doctor of Philosophy, Chemistry, 2005, Miami University
► The main goal of our research was to develop nanostructured materials for…
(more)
▼ The main goal of our research was to develop nanostructured materials for i) solid phase extraction of metal ions and ii) electrocatalytic systems. The selective preconcentration of cesium from aqueous solutions containing high concentrations of alkali metals is an important problem in the treatment of radioactive waste. We investigated the use of cobalt hexacyanoferrate (CoHCF) for this purpose. The CoHCF in our work was encapsulated in a silica sol-gel material that is templated to have pores in the nano-domain. A capacity of 0.61 ± 0.01 mmol Cs+ g-1 was achieved for the CoHCF-doped sonogel. The CoHCF silica sol-gels are promising both for the solid phase extraction of Cs+ and for the capture and storage of this cation. For environmental applications, after sorbing Cs+ the glass-like material can be sintered to collapse the pores. We found that silica sol-gel is not only a good hosting material but also a medium for growing crystals and extruding fibers. Here, a sonogel was used to grow CoSO4 and CuSO4 crystals and extrude Prussian Blue-containing fibers. Subsequently, we investigated the use of mixed-ligand monolayer-protected gold nanoclusters (MPCs) with crown ether (CE) and carboxylate functionalities for the preconcentration of cesium from aqueous solution. 18-crown-6 ether was used as a functional group because it has a selective affinity to cesium. Here, the MPCs were used to assemble layer-by-layer (LBL) films on a substrate. The uptake of cesium from solution by these films was monitored by a quartz crystal microbalance. Our general interest was to modify electrode surfaces that can selectively interact with substances ranging from metal ions to biological models. We focused on the former as a surrogate. Thus, the study was developed for a metal ion, Pb2+ which is electrochemically active. In this case, 15-crown-5, which selectively complexes with Pb2+, was used instead of 18-crown-6. The electrostatic LBL films were assembled on gold and indium tin oxide (ITO) electrodes. Trapping Pb2+ within these nanostructured films was demonstrated by voltammetry and quartz crystal microbalance measurements. Metal nanoparticles (NPs) can have different electrocatalytic properties from the corresponding bulk metal under given conditions. A hypothesis of our study was that NP catalysts can be optimized by controlling the distribution of metal NPs on an electrode surface. The oxidation of cysteine and arsenite were the test systems for AuNPs and PtNPs, respectively. Generation-4 poly(amidoamine)-encapsulated Au and Pt nanoparticles were synthesized. The metal-PAMAM NPs were assembled on an ITO electrode. The PAMAM was then decomposed by heating, leaving the NPs on the ITO. The surface excess, gamma, of PAMAM-metal NPs was controlled. The catalytic oxidation of cysteine at the resulting AuNP array was observed. Interestingly, a study of the cyclic voltammetric peak current vs gamma showed that a small amount of metal NPs dispersed on a surface electrode gave high electrocatalytic activities. For example, a mole fraction of Au-PAMAM in the assembled layer of 0.062 yielded the highest sensitivity. Linear calibration curves were obtained over the range 5 uM - 500 uM for cysteine with AuNP catalysts. For AsIII with PtNPs, linearity was observed over the range 0.2 mM – 1.0 mM.
Advisors/Committee Members: Cox, James A.
Subjects: Chemistry, Analytical
Keywords: Nanoparticles; Au; Pt; ITO; LBL; electrochemistry
More Like This
14.
Cadle, Lanette.
A Public View of Private Writing: Personal Weblogs and Adolescent Girls.
Degree: Doctor of Philosophy (Ph.D.), English/Rhetoric and Writing, 2005, Bowling Green State University
► This dissertation examines the public and private nature of personal weblogs written…
(more)
▼ This dissertation examines the public and private nature of personal weblogs written by adolescent girls. During a four-month observation period, the participants continue to post material to their weblogs and the posts during that time are available for examination and analysis. There is also an email interview and an end-of-study questionnaire that lend an inside view to the process. The reflection, collaboration, and mentoring that these blogs enable act as a feminist space as well as a personal one uniquely qualified for investigating identity. At the same time, the intersection of writing, introspection, and digital tools also lends the possibility of answering another feminist goal, that is expressed in AAUW’s Tech Savvy of bringing more girls to the sciences and to make them more comfortable in digital spaces. I propose that identity development and the need for a space that is both public and private may be behind the steady increase proportionately and numerically of adolescent girls in the LiveJournal user base. From April 2004 to April 2005 the increase has been steady, with the female user base rising from 65.2% to 67.3%, the majority of those being between the ages of 15 and 21 as per the statistics on April 30, 2005. This indicates that a need is being filled and provides an important part of the rationale for my study. It is significant also because by sheer numbers, adolescent girls in personal weblogs are making the definition of what acceptable public discourse is more diffuse and inclusive.
Advisors/Committee Members: Blair, Kristine.
Subjects: Language, Rhetoric and Composition
Keywords: weblogs; adolescent girls; personal writing; gender; blogs; feminism; literacy; identity
More Like This
16.
Caffrey, Donald A.
Small Offices for a New Age: Downtown Cincinnati.
Degree: Master of Architecture, Architecture, 2001, Miami University
► The modern world has become one of dualities, of abstracts and of…
(more)
▼ The modern world has become one of dualities, of abstracts and of tangibles. No one development better represents this trend than the Internet. While we shop and browse in a world constructed of ones and zeroes, it creates a physical reality in terms of cash and buildings and trucks and all the things that make businesses. As the physical becomes the virtual, so too does the virtual become the physical. How do we construct this reality? It seems that the physical needs of such a reality will be constantly changing. There will be a need that remains constant though, the need for accurate representation of this abstract. How does this creation of ours, this abstract, translate into reality? A community of small offices in downtown Cincinnati is presented as such an example.
Advisors/Committee Members: Benson, Robert.
Subjects: Architecture
More Like This
17.
Cahill, Daniel J.
The Role of Transformational Leadership, Vision Communication and Vision Characteristics on the Growth of Dotcoms in the Midwest.
Degree: PhD, Interdisciplinary : Interdisciplinary Studies, 2002, University of Cincinnati
► The present study examines the impact of transformational leadership, management of meaning,…
(more)
▼ The present study examines the impact of transformational leadership, management of meaning, and vision characteristics on the growth of dotcoms. Transformational leadership is a popular leadership theory that describes two opposite dimensions known as transformational and transactional leadership styles (Bass, 1985; Bass and Avolio, 1990). Leadership as the “management of meaning” is an extension of the visionary and transformational leadership literatures and may help explain the intricacies involved in the visioning process. The literature is based on two key assumptions. First, leadership becomes real in the process of framing and defining reality for employees (Smirich and Morgan, 1982). Second, there is a clear distinction between leaders and managers based on presentation of a vision (Zaleznik, 1977; Pondy, 1978; Pfeffer, 1981; Bennis and Nanus, 1985). The literature also suggests that a vision must have seven key characteristics that make it successful. Using startups as a point of reference, dotcom is defined as an organization that is dependent on some form of seed funding or venture capital with up to 150 employees. Generally, the organization has been in business for less than five years and relies heavily on the Internet as a basis for its business model. Dotcoms distinguish themselves by adding “.com” to the name of their business and promote certain cultural elements that distinguish them from a startup, although the specific characteristics of the culture are less clear. The research is driven by three hypotheses that focus on the impact of the three preceding variables on growth. The results show no support for the hypotheses although the interview data does reveal that the role of the CEO and CFO as transformational leaders is evolving. Suggestions for future research are discussed.
Advisors/Committee Members: Fairhurst, Gail T.
Subjects: Business Administration, Management
Keywords: Transformational Leadership; Vision Communication; Vision Characteristics; Dotcoms
More Like This
18.
Cahoy, Dexter Odchigue.
Fractional Poisson Process in Terms of Alpha-Stable Densities.
Degree: Doctor of Philosophy, Statistics, 2007, Case Western Reserve University
► The link between fractional Poisson process (fPp) and α-stable density is established…
(more)
▼ The link between fractional Poisson process (fPp) and α-stable density is established by solving an integral equation. The result is then used to study the properties of fPp such as asymptotical n-th arrival time, number of events distributions, covariance structure, stationarity and dependence of increments, self-similarity, and intermittency property. Asymptotically normal parameter estimators and their variants are derived; their properties are studied and compared using synthetic data. An alternative fPp model is also proposed.Finally, the asymptotic distribution of a scaled fPp random variable is shown to be free of some parameters; formulae for integer-order, non-central moments are also derived.
Advisors/Committee Members: Woyczynski, Wojbor A.
Subjects: Statistics
More Like This
19.
Caia, George Laurentiu.
Pion Photo- and Electro-production from the Nucleon.
Degree: Doctor of Philosophy (PhD), Physics (Arts and Sciences), 2004, Ohio University
► We present a relativistic dynamical model for pion photo- and electro-production on…
(more)
▼ We present a relativistic dynamical model for pion photo- and electro-production on the nucleon. The model uses a manifestly Lorentz-covariant approach based on solving a relativistic coupled-channel scattering equation in the pion-photon channel space. The effect of the pion-nucleon final state interaction is thus explicitly included in a way that is consistent with the two-body unitarity – - the Watson theorem is obeyed exactly. This work applies the dynamical model for π N scattering of Pascalutsa and Tjon, to virtual photons by introducing electromagnetic form factors in the Born (non-resonant) and resonant terms. Special care is taken to satisfy current conservation for the Born terms by imposing the Ward-Takahashi identity at the nucleon and pion electromagnetic vertices, thereby allowing us to use realistic electromagnetic form factors. We perform a multipole decomposition and analyze the electromagnetic form factors and quadrupole deformation ( R EM and R SM ) of the Δ(1232). We compare our model with recent data for single polarization observables, for both pion photo- and electro-production.
Advisors/Committee Members: Wright, Lois E.
Subjects: Physics, General
Keywords: Pion; Photo-Production; Electro-Production; Scattering; Covariant; Unitary
More Like This
20.
Cai, Gangfeng.
Synthesis and characterization of oxazoline homopolymers, random and block copolymers.
Degree: Doctor of Philosophy, Macromolecular Science, 1991, Case Western Reserve University
► This dissertation is concerned with the synthesis and characterization of several series…
(more)
▼ This dissertation is concerned with the synthesis and characterization of several series of highly crystallizable homopolymers, block and random copolymers from 2-substituted 2-oxazolines. Phenyl (P) and Undecyl (U) oxazoline diblock (PU) and triblock (UPU) copolymers with almost the same P block length (about 10 monomer units) and various U block lengths (19-55 monomer units) were synthesized. They all have high water contact angles (geq107° for most of the block copolymers), low critical surface energies (21 dynes/cm), and low peel strength with pressure sensitive adhesives at room temperature for a short time after application. Their peel strength increases at elevated temperatures and/or long dwell times. Therefore two undecyl homopolymers with relatively high molecular weights (monomer/initiator ratio, M/I = 99 and 510) were made and tested as abhesives. It was found that unlike the phenyl/undecyl block copolymers, the undecyl homopolymers retain good adhesive properties up to 100°C. We attached a bulky, flexible siloxanyl group to the tail of the highly crystallizable alkyl side chain of decenyl oxazoline to see the effect of a bulky non-polar group on the polymer properties. 10-(pentamethyl disiloxanyl) decyl oxazoline (Si) was copolymerized with undecyl (U) or nonyl (N) oxazoline. Two series of random copolymers, U/Si and N/Si, were made with a total degree of polymerization of 100 and narrow molecular weight distributions. As we expected, their critical surface energies are almost the same as those of undecyl polymers, 21 dynes/cm, because their surfaces also consist of methyl groups. More interestingly, these two random copolymers crystallize two dimensionally over a broad composition range (10-65 mol.% of Si for N/Si copolymers, 10-50 mol.% of Si for U/Si copolymers). This proposed new crystalline structure was supported by both DSC (differential scanning calorimetry) and WAXD (wide angle x-ray diffraction) data.
Advisors/Committee Members: Litt, Morton H.
Subjects: Chemistry, Polymer
Keywords: oxazoline homopolymers block copolymers
More Like This
21.
Cai, Haiping.
Stimulation of apical NHE3 endocytosis by ouabain-activated basolateral Na/K-ATPase Signaling Complex.
Degree: Master of Science in Biomedical Sciences (MSBS), College of Graduate Studies, 2008, University of Toledo Health Science Campus
► By using LLC-PK1 cells (a porcine renal proximal tubule cell line), we…
(more)
▼ By using LLC-PK1 cells (a porcine renal proximal tubule cell line), we have demonstrated that the long-term effects of ouabain and other cardiotonic steroids on transepithelial Na+ transport involved transcriptional down-regulation of NHE3 in previous studies. In this study, we investigated the acute effect of ouabain on NHE3. We observed that administration of ouabain in basolateral aspect of LLC-PK1 cells, but not in apical aspect, significantly reduced transepithelial Na+ transport. This ouabain effect was not due to changes in the barrier function of tight junction or increases in intracellular Na+ concentration, but resulted from ouabain-stimulated the endocytosis of NHE3 and subsequent inhibition of apical NHE3 activity. Moreover, ouabain-induced NHE3 endocytosis was abolished by either cholesterol depletion or Src inhibitor PP2. Likewise, blocking of Na/K-ATPase endocytosis by PI3K inhibitor was equally effective in inhibiting ouabain-induced NHE3 endocytosis. In addition, ouabain increased intracellular Ca2+ and pre-treatment of cells with an intracellular Ca2+ chelator (BAPTA-AM) completely blocked ouabain-induced endocytosis of NHE3. Taken together with these observations, it indicates that ouabain can stimulate apical NHE3 endocytosis by activating the basolateral Na/K-ATPase signaling complex. This pathway may be relevant to proximal tubular sodium handling during conditions associated with increases in circulating endogenous cardiotonic steroids.
Advisors/Committee Members: Liu, Jiang.
Subjects: Molecular biology
Keywords: NHE3; Kidney
More Like This
22.
Cai, Jingfeng.
Decision Tree Pruning Using Expert Knowledge.
Degree: Doctor of Philosophy, Electrical Engineering, 2006, University of Akron
► Decision tree technology has proven to be a valuable way of capturing…
(more)
▼ Decision tree technology has proven to be a valuable way of capturing human decision making within a computer. It has long been a popular artificial intelligence(AI) technique. During the 1980s, it was one of the primary ways for creating an AI system. During the early part of the 1990s, it somewhat fell out of favor, as did the entire AI field in general. However, during the later 1990s, with the emergence of data mining technology, the technique has resurfaced as a powerful method for creating a decision-making program. How to prune the decision tree is one of the research directions of the decision tree technique, but the idea of cost-sensitive pruning has received much less investigation than other pruning techniques even though additional flexibility and increased performance can be obtained from this method. This dissertation reports on a study of cost-sensitive methods for decision tree pruning. A decision tree pruning algorithm called KBP1.0, which includes four cost-sensitive methods, is developed. The intelligent inexact classification is used for first time in KBP1.0 to prune the decision tree. Using expert knowledge in decision tree pruning is discussed for the first time. By comparing the cost-sensitive pruning methods in KBP1.0 with other traditional pruning methods, such as reduced error pruning, pessimistic error pruning, cost complexity pruning, and C4.5, on benchmark data sets, the advantage and disadvantage of cost-sensitive methods in KBP1.0 have been summarized. This research will enhance our understanding of the theory, design and implementation of decision tree pruning using expert knowledge. In the future, the cost-sensitive pruning methods can be integrated in other pruning methods, such as minimum error pruning and critical value pruning, and include new pruning methods in KBP. Using KBP to prune the decision tree and getting the rules from the pruned tree to help us build the expert system is another direction of our future work.
Advisors/Committee Members: Durkin, John.
Subjects: Computer Science
Keywords: Decision Tree; Expert System
More Like This
23.
CAI, JUN.
AERODYNAMICS OF LEAN DIRECT INJECTION COMBUSTOR WITH MULTI-SWIRLER ARRAYS.
Degree: PhD, Engineering : Aerospace Engineering, 2006, University of Cincinnati
► Multi-point Lean Direct Injection (LDI) combustion focuses on low NOx emissions under…
(more)
▼ Multi-point Lean Direct Injection (LDI) combustion focuses on low NOx emissions under extremely high temperature and pressure environment as might be used in high performance aircraft engines in the near future. The performance of the multi-point LDI combustor directly depends on the aerodynamics of the combustor swirlers and their different combinations. Therefore, further understanding of the underlying physical performance of swirler arrays is one of the primary requirements for advanced LDI combustor design. The focus of this dissertation is to investigate the aerodynamics of co-rotating and counter-rotating multi-swirler arrays. This study covers two aspects of investigation, experimental and computational. Experimental measurements were conducted on the flow fields of a macro-laminated radial swirler, a discrete-jet swirler with different size confinements, and co-rotating and counter-rotating swirler arrays using the discrete-jet swirler. Computational studies of the flow in the swirler and the downstream tube were carried out using k-ε and Reynolds stress turbulence models and the results were compared with experimental data. The experimental measurements show that the swirling flow generated by the macro-laminated swirler is not uniform. Discrete air jets can be found near the exit. The square chamber strongly affects the velocity distribution. The study on the flow structures of a discrete-jet swirler in three different size confinements shows that the confinement size strongly affects flow structure such as the recirculation zone size, velocity distribution and turbulence levels. The experimental results of co-rotating and counter-rotating swirler array indicate that the considered flow fields have very complicated structures. The existence of recirculation zones and strong turbulence levels indicate the potential for good combustion performance and Low NOx emissions. For the single swirler case, both the k-ε and the Reynolds stress models were able to predict the flow structure very well. However for the co-rotating swirler array, the Reynolds stress model proved superior to the k-ε model, and was able to predict the extremely complicated flow structure well.
Advisors/Committee Members: Jeng, Dr. San-Mou.
Subjects: Engineering, Aerospace
Keywords: Swirling Flow, LDI, NOx, Swirler array
More Like This
24.
Cai, Liuchun.
Molecular Structure of Ga2S3)x(GeS2 )1-x Glasses by Raman Scattering and T-Modulated DSC.
Degree: MS, Engineering : Electrical Engineering, 2003, University of Cincinnati
► The doping behavior of the group III additive Indium in GexSe1-x glasses…
(more)
▼ The doping behavior of the group III additive Indium in GexSe1-x glasses is examined in temperature modulated DSC (MDSC) measurements. The results show that variation in Tg, (dTg/dy)obs, in GexInySe1-x-y glasses, in the floppy (x = 0.10), intermediate (x = 0.22) and stressed rigid (x > 0.26) phases reveal slopes that can be quantatively understood in term of a model in which In segregates into nanocrystalline In2Se3 clusters. A parallel behavior is suggested for Ga in stressed rigid (x > 0.26) base glasses. Molecular structure of Ge x S 1-x glasses in the 0.30 < x < 0.34 range is examined by Raman scattering, 119Sn Mössbauer spectroscopy, and MDSC. The results show that the stoichiometric glass, x = 1/3 (Tg = 508°C is partially polymerized into 3 phases; a majority phase consist of Ge(S1/2)4 tetrahedra (A); a Ge-rich minority phase consisting of ethanelike Ge2(S1/2)6 units (B), and a minority GeS phase consisting of distorted rocksalt Ge(S1/6)6 units (C) in approximately 93.4 : 3.6 : 3.0 ratio as deduced from Raman scattering. Raman Scattering and MDSC investigations of the molecular structure of (GeS2)1-x(Ga2S3)x glasses shows the existence of a rather striking anomaly when x = 17%. In the 0 < x < 17% range, additive (Ga 2 S 3 ) enters the base glass as Ga(S 1/2 ) 4 units forming part of the base glass network, and results in a Ge-rich Ge 2 S 3 nanophase to segregate from the backbone. At x > 17%, the additive (Ga2S3) now nucleates a Ga-rich, GaS like phase, releasing S that permits Ge2S3 nanophase to alloy back in the base glass network.
Advisors/Committee Members: Boolchand, Dr. Punit.
Keywords: molecular structure; additive In and Ga in Ge-Se glasses; Ge-S glasses; Ge-Ga-S glasses
More Like This
25.
Cai, Minghao.
Acousto-Plastic deformation of metals by nonlinear stress waves.
Degree: Doctor of Philosophy, Mechanical Engineering, 2006, Ohio State University
► The present dissertation summarizes the results of research and development for elastic-plastic…
(more)
▼ The present dissertation summarizes the results of research and development for elastic-plastic deformation of metals by nonlinear stress waves. The focus of the present work is the development of a new theoretical and numerical framework to simulate nonlinear stress waves in solids. The application of the new method focuses on modeling the plateau stage of a novel ultrasound welding process. Superimposed by ultrasonic vibrations, metal specimens under static loading experience remarkable transitory softening, which has been called the Blaha effect or the Acousto-Plastic Effect (APE). Previous microscopy studies showed that the metals experience significant plastic deformation and the morphology resembles the Kelvin-Helmholtz instability waves in the presence of shear stresses. The present research addresses the need to understand the APE beyond phenomenological descriptions in the literature. Theoretical and numerical studies have been performed to understand the unusual metal deformation induced by ultrasonic vibrations. A comprehensive continuum mechanics model for macroscopic description of nonlinear stress waves in solids has been developed, including conservation laws of mass, momentum, and energy in the Eulerian frame, in conjunction with a set of transport equations for stress components, which have been derived based on the elastic-plastic constitutive relation employed. The present approach aims to directly address the dynamic nature of the processes rather than treating transitory metal softening by proposing “effective constitutive relations” to relate the nominal “static stress” to the nominal “static strain.” Various forms of the governing equations have been systematically derived. The eigensystem of each set of model equations has been analyzed in details with clear presentation of the analytical forms of eigenvalues and the associated eigenvector matrices. To solve these governing equations for the nonlinear stress waves, the space-time Conservation Element and Solution Element (CESE) method has been used. Numerical results of one- and two-dimensional elastic and elastic-plastic stress waves are reported in the dissertation. The numerical results are validated by a series of comparison between the one–dimensional numerical results of elastic and elastic-plastic waves and the available analytical solutions, experimental results and published numerical works.
Advisors/Committee Members: Yu, Sheng-Tao (John).
Subjects: Engineering, Mechanical
Keywords: Acousto-Plastic Effect(APE), Nonlinear stress waves, space-time Conservation Element and Solution Element (CESE), UltraSound Welding
More Like This
29.
Cain, Robert J.
Aqueous Processing of Corrosion Inhibiting Hybrid Nanocomposite Bulk Coating.
Degree: MS, Engineering : Materials Science, 2006, University of Cincinnati
► Environmentally friendly sol-gel coatings were developed on the automotive alloy AA6111. The…
(more)
▼ Environmentally friendly sol-gel coatings were developed on the automotive alloy AA6111. The one-step coating process neither involves adding heavy metal chromium compounds nor organic solvents. Nano-structured silane coatings were developed and were systematically, optimized for corrosion resistance, as a function of reactant concentration and days of precursor reaction time. It was found that the precursor solution composed of Glycidoxypropyltrimethoxysilane (GPTMS) and Tetramethoxysilane (TMOS) (with a 3/1 respective ratio) needed at least 3 days of reacting time for proper hydrolysis and condensation. The results also indicate that at least a 7:1 ratio of curing agent Aminopropyl triethoxysilane (APTEOS) to GPTMS was optimal. The structure and composition of the hybrid coatings were determined using Fourier Transform Infrared Spectroscopy (FTIR). Coating adhesion was evaluated with dynamic contact angle analysis (DCA) and scratch testing. Corrosion performance was determined using DC Polarization (DCPT) and time dependent Electrochemical Impedance Spectroscopy (EIS). However, within two weeks, exposure to corrosive solution demonstrate coating instability in 3.5% NaCl salt solution. Hydrodynamic instability was improved, and internal stresses were reduced by replacing the monomeric curing agent with a commercial polymeric amine adduct. A wide range of reactant ratios were evaluated from 1:1 to 9:1, all of which were comparable with polarization tests. The 7 to 1 ratio lasted EIS testing for over three months. The curing kinetics were evaluated with respect to time, temperature, and extent of cure. Different curing temperatures were evaluated from room temperature to 130ºC. It was found that the presence of water may slow the reaction rate below 100ºC. Finally, fillers were introduced for their corrosion resistance and corrosion sensing abilities. Na+ Montmorrilonite clay composites were produced and exhibited water sensing abilities as confirmed by X-Ray Diffraction (XRD). XRD also confirmed the amorphous nature of the coating. Successful electrochromic behavior was observed in two of the coating formulations incorporating Prussian Blue with prolonged exposure to corrosive solutions.
Advisors/Committee Members: Iroh, Dr. Jude.
Subjects: Engineering, Materials Science
Keywords: Corrosion, Coating, Sol-gel, Aluminum, Nano, Silane
More Like This
30.
Cain Spannagel, Sarah A.
THE RELATIONSHIP BETWEEN INTERPERSONAL THEMES IN PLAY AND PROSOCIAL MORAL REASONING.
Degree: Master of Arts, Psychology, 2008, Case Western Reserve University
► Research has shown that both pretend play and prosocial moral reasoning relate…
(more)
▼ Research has shown that both pretend play and prosocial moral reasoning relate to the socio-emotional constructs of emotional understanding, perspective taking, and empathy. It then makes theoretical sense that play processes should relate to prosocial moral reasoning. The present study investigated this relationship and also served to provide further validation evidence for the Interpersonal Themes in Play Scale (ITPS). It was hypothesized that the ITPS scale scores would be related to prosocial moral reasoning in that children who showed more prosocial behaviors in their play would demonstrate more advanced moral reasoning. This study also investigated the relationship among prosocial moral reasoning, empathy, and prosocial behavior. Results indicated that some prosocial themes in play did relate to prosocial moral reasoning categories and to sharing behavior. For example, Sharing/Turn-taking in play was significantly negatively related to hedonistic reasoning (r(58)= -.26) and Cooperation in play was significantly positively related to stereotyped reasoning (r(58)=.25).
Advisors/Committee Members: Russ, Sandra W.
Subjects: Psychology, Clinical
More Like This
[1] [2] [3] [4] [5] … [53]