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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Glomerular information processing in Xenopus laevis

de Jong, Daniëlle 22 April 2016 (has links)
No description available.
62

Kinetic Theory for Anisotropic Thermalization and Transport of Vibrated Granular Material

Khambekar, Jayant Vijay 02 May 2007 (has links)
The purpose of this work is to develop a continuum theory that may be used to predict the effects of anisotropic boundary vibrations on loose granular assemblies. In order to do so, we extend statistical averaging techniques employed in the kinetic theory to derive an anisotropic flow theory for rapid, dense flows of identical, inelastic spheres. The theory is anisotropic in the sense that it treats the full second moment of velocity fluctuations, rather than only its isotropic piece, as a mean field to be determined. In this manner, the theory can, for example, predict granular temperatures that are different in different directions. The flow theory consists of balance equations for mass, momentum, and full second moment of velocity fluctuations, as well as constitutive relations for the pressure tensor, the flux of second moment, and the source of second moment. The averaging procedure employed in deriving the constitutive relations is based on a Maxwellian that is perturbed due to the presence of a deviatoric second and full third moment of velocity fluctuations. Because the theory is anisotropic, it can predict the normal stress differences observed in granular shear flows, as well as the evolution to isotropy in an assembly with granular temperatures that are initially highly anisotropic. In order to complement the theory, we employ similar statistical techniques to derive boundary conditions that ensure that the flux of momentum as well as the flux of second moment are balanced at the vibrating boundary. The bumps are hemispheres arranged in regular arrays, and the fluctuating boundary motion is described by an anisotropic Maxwellian distribution function. The bumpiness of the surface may be adjusted by changing the size of the hemispheres, the spacing between the hemispheres in two separate array-directions, and the angle between the two directions. Statistical averaging consistent with the constitutive theory yields the rates at which momentum and full second moment are transferred to the flow. In order to present results in a form that is easy to interpret physically, the statistical parameters that describe the boundary fluctuations are related in a plausible manner to amplitudes and frequencies of sinusoidal vibrations that may differ in three mutually perpendicular directions, and to phase angles that may be adjusted between the three directions of vibration. The focus of the results presented here is on the steady response of unconfined granular assemblies that are thermalized and driven by horizontal bumpy vibrating boundaries. In a first detailed study of the effects of the boundary geometry and boundary motion on the overall response of the assemblies, the anisotropic theory is reduced to a more familiar isotropic form. The resulting theory predicts the manner in which the profiles of isotropic granular temperature and solid volume fraction as well as the uniform velocity and corresponding flow rate vary with spacings between the bumps, angle of the bump-array, energy of vibration, direction of vibration, and phase angles of the vibration. In a second study, we solve the corresponding, but more elaborate, boundary value problem for anisotropic flows induced by anisotropic boundary vibrations. The main focus in presenting these results is on the differences between granular temperatures in three perpendicular directions normal and tangential to the vibrating surface, and how each is affected by the bumpiness of the boundary and the direction of the vibration. In each case, we calculate the corresponding nonuniform velocity profile, solid volume fraction profile, and mass flow rate.
63

Responsabilidade civil por danos à pessoa humana oriundos do uso de perfis falsos em sites de redes sociais / Civil liability for damage to the human person from the use of fake profiles on social networking sites

João Victor Rozatti Longhi 03 July 2011 (has links)
As transformações sociais advindas da popularização de Tecnologias da Informação e Comunicação (TICs) como a Internet são flagrantes. E a regulamentação destas novas práticas deve ser condizente com as peculiaridades das relações jurídicas desenvolvidas neste âmbito. Este trabalho visa analisar o problema da responsabilidade civil por danos à pessoa humana sofridos no âmbito dos sites de redes sociais pela criação e uso de perfis falsos. Assim, primeiramente, faz-se uma análise introdutória do fenômeno da Internet e das visões sobre as possíveis formas de regulamentação jurídica das condutas praticadas por meio da Rede. Posteriormente, adstringe-se à temática dos danos morais, buscando-se conceituá-los sob a ótica civil constitucional, como danos à pessoa humana. Finalmente, chega-se ao estudo dos perfis falsos, enfrentando-se a problemática dos danos morais sofridos por seu manejo. São desdobradas em três subproblemas: se são ou não capazes civilmente os usuários, chegando-se ao estudo dos perfis de menores de idade; se existem ou não as pessoas representadas nos perfis, subdividindo-se a análise nas hipóteses de perfis criados em roubo de identidade e perfis que representem criações intelectuais e; se estão ou não vivas as pessoas descritas nos perfis, trazendo-se à baila a hipótese dos perfis de pessoas falecidas. / The popularization of Information and Communication Technologies (ICTs) like Internet brought undeniable changes for many. The legal regulation of these new habits must be harmonized with the quirks of such legal relations. This work aims to analyze the problem of the civil liability for moral injuries due to the creation and use fake profiles on the online social network websites. First, it studies some preliminary notions about the Internet and some legal opinions about its governance. After, the issue is restricted to the study of moral injuries at the civil constitutional legal doctrine measure as a damage to the human dignity of person. Finally, the work arrives at the fake profiles and the moral injuries caused by it. Then comes three sub-problems: if the user is legal incapable or not, taking to the study of profiles children and adolescent; if the person represented at the online profile really exists or not, taking to the problems about identity theft and intellectual property violations, and; if the person is alive or not, taking to the topic of deceased persons profiles.
64

Experimental simulation of distillation column profile maps

Modise, Tshepo Sehole David 27 March 2008 (has links)
ABSTRACT One of the most important tasks in the chemical industry is the separation of multicomponent liquid mixtures into one or more high-purity products. Several technologies are feasible for this task, either alone or in combination, such as distillation, extraction, crystallization, ect. Among these, distillation is by far the most widely spread and has a long history in chemical technology. However, until recently, there has been no systematic approach for understanding the separation of complex mixtures where azeotropes and multiple liquid phases may occur. There has been a growing interest in the use of residue curve and column profiles for the preliminary design of distillation columns. Residue curves and column profile are not only used to predict the composition changes in the distillation column but also to determine the feasibility of the proposed separation. Recently, theory underlying column profile maps has been developed by Tapp, Holland and co-workers. However there has been no direct experimental validation of the predictions of the column profile map theory. The main aim of this thesis is to experimentally verify some of the predictions of column profile map theory. A simple experimental batch apparatus has been developed to measure residue curve maps (RCMs) by Tapp and co-workers, the apparatus was modified so that it could be used to measure column profile maps (CPMs) in this thesis. CPM theory has shown that CPMs are linear transforms of the residues curve maps (RCMs). A stable node which was the apex of a mass balance triangle (MBT) was introduced inside the MBT, this was done by transforming the RCMs to CPMs using the appropriate distillate composition xd and reflux ratio R. It was also shown that the saddle point which was on the boundary of the triangle of the RCM can be shifted inside the MBT by transforming the RCM to CPM. This is again in accordance with theoretical predictions of CPM theory. iv Residue curves (RCs) and pinch point curves (PPCs) are used to determine the operation leaves and hence the feasible region for distillation columns operating at a specific distillate and bottoms composition for all fixed reflux ratio. The operating leaves were expanded beyond the pinch point curve by varying the reflux ratio from a higher reflux to a lower reflux ratio. This showed that one can effectively cross the pinch point curve hence expanding the operating leave. Finally the importance of experimentally measuring CPMs is demonstrated. Two thermodynamic models were used to predict the profiles of a complex system. The binary vapor-liquid equilibrium (VLE) diagrams and the residue curves produced from using these two thermodynamic models did not predict the same topology. The composition of the profiles were not the same because there were multiple liquid phases involved in this system, which made it difficult for the researchers to measure the correct profiles. Column profile maps were simulated using the different thermodynamic models, they also showed that there is some discrepancy between the predictions of the two models.
65

A Bridge over Troubled Waters: Power, Exploitation, and Gender in International Online Matchmaking.

January 2019 (has links)
abstract: This study examines the representation of Asian online brides by studying the images and profiles that are advertised on Asianonlinebrides.com. To do so, I combined the history and growth of the Human Trafficking industry, the idea of the Asian “exotic OTHER,” the power and structured/constrained agency, and social construction of gender theories. In particular, I utilized a mixed methods approach for data collection. The content and visual analysis in this study provided the two sides of the analytic coin: the written and the visual. I am particularly interested in the narrative comments offered by the prospective brides, e.g., what they state to be their preferences in their dream man/husband, and the personality traits, and characteristics that they write about themselves. The following were examined: the gender displays, picture frames, feminine touch, and the ritualization of subordination. For example, body language, clothing, skin, hair color, and texture, bone structure, posture, etc. I argue that this data alerts us to the whole host of ideas, assumptions, social, cultural, and gender constructions. The power relations that exceeds the text and inform us of these online brides. The findings have indicated that these women are vulnerable and caught within oppressive social structures. They have nevertheless utilized those structures to their advantage. By doing so, the brides have acted as assertive agents in that they have looked out for the interests of both themselves and their families. Moreover, a significant body of data was provided first hand through the written and visual narratives of the online brides. These brides have offered valuable insight into the field of Asian online brides. Their stories have presented a unique perspective to the online brides’ process that can only be captured through the narratives provided in this research. / Dissertation/Thesis / Doctoral Dissertation Justice Studies 2019
66

Comparison of Stability Profiles of Three Generic Vancomycin Hcl for Injections Products

Kirk, Loren, Brown, Stacy D., Lewis, Paul 01 October 2013 (has links)
No description available.
67

Hypermasculinity Attitude Profiles and Depressive Symptoms in Emerging Adult Males

January 2013 (has links)
The project examines hypermasculine attitudes and depressive symptoms in emerging adult males. Recent research has suggested that although males have historically reported lower rates of depressive symptoms than females (Boticello, 2009), emerging adulthood may be a time when males are at an increased risk of developing depressive symptoms due to fear of failing to fulfill traditional masculine roles (e.g., breadwinner) and failure to achieve intimate romantic partnerships as a result (Oliffe et al., 2010). Some males may attempt to cope with these negative feelings by adopting maladaptive and exaggerated hypermasculine attitudes. Hypermasculine attitudes are associated with a variety of negative outcomes including violence toward women and substance abuse (Mosher & Sirkin, 1984). Substance use is also associated with depressive symptoms as a form of self-medication (Joiner et al., 1992) and masculinity in the college social context (Iwamoto et al., 2011). Hypermasculinity was originally conceptualized as a personality trait, but more recent research has examined it as a reactive coping strategy (Cunningham & Meunier, 2004). Furthermore, there is also evidence that hypermasculine attitudes may be more multidimensional and that different profiles of hypermasculine attitudes may be associated with different behavioral and psychological outcomes (Burke, Burkhart, & Sikorski, 2004). 328 males ages 18-25 who attend college completed the survey. The results do not support the hypothesized profile of hypermasculine attitudes. However, analysis of demographic characteristics did yield one large homogeneous cluster (n =213) for whom hypermasculine attitudes may be serving as a reactive coping strategy for depressive symptoms, and another large heterogeneous cluster (n = 115) for whom hypermasculine attitudes may not be serving as a coping strategy for depressive symptoms. / acase@tulane.edu
68

‘No worries’ : A longitudinal study of fear, attitudes and beliefs about childbirth from a cohort of Australian and Swedish women

Haines, Helen January 2012 (has links)
Much is known about childbirth fear in Sweden including its relationship to caesarean birth. Less is understood about this in Australia. Sweden has half the rate of caesarean birth compared to Australia. Little has been reported about women’s beliefs and attitudes to birth in either country. The contribution of psychosocial factors such as fear, attitudes and beliefs about childbirth to the global escalation of caesarean birth in high-income countries is an important topic of debate. The overall aim of this thesis is to investigate the prevalence and impact of fear on birthing outcomes in two cohorts of pregnant women from Australia and Sweden and to explore the birth attitudes and beliefs of these women.   A prospective longitudinal cohort study from two towns in Australia and Sweden (N=509) was undertaken in the years 2007-2009. Pregnant women completed self-report questionnaires at mid-pregnancy, late pregnancy and two months after birth. Fear of birth was measured in mid-pregnancy with a tool developed in this study: the Fear of Birth Scale (FOBS). The FOBS showed promise as a clinically practical way to identify women with significant fear. A similar prevalence of fear of birth (30 percent) was found in the Australian and Swedish cohorts (Paper I).  The Swedish women had attitudes indicating a greater concern for the personal impacts of birth and a belief system that situated birth as a natural event when compared to the Australian women (Paper II). Finally, when women’s attitudes and levels of fear were combined, three profiles were identified: Self determiners, Take it as it comes and Fearful (Paper III). Belonging to the Fearful profile had the most negative outcomes for women including higher rates of elective caesarean, more negative feelings in pregnancy and post birth and poorer perceptions of the quality of their antenatal and intra-partum care (Paper IV).
69

Individual-Technology Fit: Matching Individual Characteristics and Features of Biometric Interface Technologies with Performance

Randolph, Adriane 18 May 2007 (has links)
Abstract INDIVIDUAL-TECHNOLOGY FIT: MATCHING INDIVIDUAL CHARACTERISTICS AND FEATURES OF BIOMETRIC INTERFACE TECHNOLOGIES WITH PERFORMANCE By ADRIANE B. RANDOLPH MAY 2007 Committee Chair: Dr. Melody Moore Jackson Major Department: Computer Information Systems The term biometric literally means “to measure the body”, and has recently been associated with physiological measures commonly used for personal verification and security applications. In this work, biometric describes physiological measures that may be used for non-muscularly controlled computer applications, such as brain-computer interfaces. Biometric interface technology is generally targeted for users with severe motor disabilities which may last long-term due to illness or injury or short-term due to temporary environmental conditions. Performance with a biometric interface can vary widely across users depending upon many factors ranging from health to experience. Unfortunately, there is no systematic method for pairing users with biometric interface technologies to achieve the best performance. The current methods to accommodate users through trial-and-error result in the loss of valuable time and resources as users sometimes have diminishing abilities or suffer from terminal illnesses. This dissertation presents a framework and methodology that links user characteristics and features of biometric interface technologies with performance, thus expediting the technology-fit process. The contributions include an outline of the underlying components of capturing and representing individual user characteristics and the impact on the performance of basic interaction tasks using a methodology called biometric user profiling. In addition, this work describes a methodology for objectively measuring an individual’s ability to control a specific biometric interface technology such as one based on measures of galvanic skin response or neural activity. Finally, this work incorporates these concepts into a new individual-technology fit framework for biometric interface technologies stemming from literature on task-technology fit. Key words: user profiles, biometric user profiling, biometric interfaces, fit, individual-technology fit, galvanic skin response, functional near-infrared, brain-computer interface
70

Taking ideas from online social media in development of academic profiles of researchers

Naushahi, Faroogh Hassan January 2011 (has links)
The terms social media and social networking have been under the spotlight in recent times due to enormous success of some of the social networking websites. Creating profiles and making friends are the prime activities on these sites. People upload pictures, videos and create events on these sites to share with their friends. Some people are more active than others when it comes to participating in online social activity. But more or less, most users; be it active or passive find time almost daily to log in and see what is happening on these sites. The aim of this paper is to propose a design for online profiles of researchers and teachers who work in a university environment based on ideas from existing social media and similar systems. In this research I a) identified elements of such a system by studying the already existing profiles of researchers in ten different Swedishuniversities b) interviewed researchers and students at different departments of UppsalaUniversity to get first hand knowledge on how such a system should look like c) propose design recommendations for online profiles of people involved in education in universities based on the requirements collected.

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