This dissertation seeks to understand how the need for orientation (NFO) and motivated reasoning influence the agenda-setting process at the level of the individual by examining whether and to what extent the two types of motivations guide individuals to process information differently, thereby resulting in differences in the second level of agenda-setting effects. The first motivation, the need for orientation (NFO), was developed as part of the agenda-setting theory in communication studies, while the other set of motivations (i.e., accuracy and directional goals) was introduced by the theory of motivated reasoning that was developed in the field of psychology. By combining the two motivations - NFO and motivated reasoning - this study demonstrated that the role of NFO on the agenda setting process was moderated by motivated reasoning, accuracy and directional goals. In other words, participants with High-NFO who used accuracy goals that motivated them to seek information in accurate ways searched for more news about unemployment which was manipulated as the most salient attribute. Their information seeking behaviors, in turn, led to higher agenda-setting effects. By comparison, participants with High-NFO who used directional goals to seek information that was congruent with their prior perspectives or perceptions were less likely to seek information about unemployment and showed lower agenda-setting effects. Overall, the findings of this study suggest that individuals’ motivation to seek more information about an issue (NFO) may not always result in higher agenda-setting effects: if their motivations are biased by strong prior perceptions or perspectives, then their eagerness to seek information may blind them to what the media cover. Individuals’ motivations are expected to play an increasingly important role in their information seeking behaviors in the new media environment where people have unprecedented opportunities to access a broad range of information that varies in content as well as perspectives. Implications for the findings of this study and for the role of the media in a democratic society are also discussed. / text

It has long been a tool of the LGBTQ rights movement to loudly proclaim and own one’s sexual orientation label. However, there is a new generation of young sexual minorities who feel a label is no longer necessary. Are these no-labelers headed in the right direction? Or are they hurting the fight for LGBTQ equality? / text

An exploratory study of the geomorphology of Florida's springs was conducted using morphometric analysis. Spatial datasets for spring locations, elevation data, physiography, geology and hydrography were acquired for incorporation and analysis with GIS technology. ArcGIS 9 was used to measure certain morphometric parameters from the spatial data for Florida's springs. Other Parameters representing physical and dimensional characteristics of the springs were acquired from FGS Bulletin 66, Springs of Florida. All measured and collected data was compiled into a usable morphometric database. The data is described statistically and summarized according to the spatial distribution of Florida's springs with respect to geology and landforms. This examination is carried out at two different scales; 1) the entire population of Florida's 754 springs is examined with emphasis placed upon geology, physiography, and elevation, 2) a subset of 102 springs that is deemed to be a representative sample is examined according to all morphometric parameters. It was concluded that the presence of karst terrain at the majority of the spring sites that were examined in this study is the prevailing factor that has influenced where springs have resurged in Florida. This was observed at both scales in the study. It is also concluded that spring sites in Florida are strongly linked to lower elevations, and therefore that elevation also influences their distribution. Suggestions for future research are posed, including specific ways in which the current methodology can be expanded upon and improved.

Not available / text

To understand how falls occur during walking in older adults, we need to understand how the nervous system maintains stability, and how aging affects walking. Four studies were conducted to better understand the effect of age on gait. Older adults display higher gait variability compared to young adults, possibly because of their slower walking. We compared gait stability at multiple controlled walking speeds. Greater gait variability in healthy elderly existed independent of slower walking. Their diminished strength and flexibility partly explained this difference. To explain slower walking in the elderly, some have suggested that muscle weakness and stiffness may force people to walk slower. Others have suggested that people choose to walk slower to be more stable. We compared dynamic stability of gait at multiple speeds. Healthy older adults also exhibited more stability at slower speeds, yet walked at speeds comparable to young adults despite the lower strength and flexibility. Therefore, weakness and stiffness may not force healthy older adults to walk slower. The goal of the nervous system during walking may be to maintain stability of superior segments. We tested whether superior segments are more stable than inferior segments during walking. Superior segments exhibited less orbital stability during preferred walking speed, in contrast to previous suggestions. This highlighted the importance of trunk control during gait. The effects of aging on the fluctuations in the muscle activity during gait are not well understood. We quantified the stride-to-stride fluctuations of EMG as a measure of muscle activation patterns in state-space. Variability increased with speed except in the gastrocnemius. Orbital stability was less in older adults, suggesting that deviations in the EMG amplitude pattern were not readily corrected. Less local stability was seen in older adults, suggesting that older adults were more sensitive to perturbations. Together, these findings suggest that trunk control is important during gait. Strength and flexibility deficits help explain higher variability and lower stability in older adults. Future work will need to address the effect of strength interventions, neurophysiological decline on gait stability and fall risk.

African Americans who identify as gay, lesbian, bisexual, and transgender (GLBT) are discriminated against in the African American community. Sociodemographics such as income, education, age, and religion/spirituality have been shown to be associated with sexual prejudice. There is limited research on how African American cultural attitudes influence attitudes towards sexual orientation. The purpose of this study was to examine the extent to which demographic variables and African American cultural attitudes (measured by the African American Acculturation Scale-Revised; AAAS-R) predict attitudes toward sexual orientation in African American adults (measured by the Attitudes towards Lesbians and Gay Men Scale; ATLG). Social identity theory (SIT) was used to describe how group affiliation influences attitudes. A sample of African Americans who were 18 years or older (n = 236) completed the questionnaires online. Stepwise multiple regression analyses were conducted to examine the relative importance of demographics and cultural attitudes in predicting attitudes towards homosexuals and lesbians. The results of the study indicated that religious affiliation and religious beliefs and practices were statistically significant in predicting attitudes towards both homosexual and lesbian individuals. These findings suggest that individuals who identify as Christians and have stronger religious beliefs and practices are more likely to have negative attitudes towards lesbians and gay men. These results lend support to efforts to create programs to educate people about cultural misconceptions of the African American GLBT community and to encourage spiritual leaders to promote efforts support to them.

Reducing the complexity in information systems is a main concern on which researchers work. Separation of concerns, also known as the principle of ‘divide and conquer’, has long time been a strategy for dealing with complexity. Two examples of the application of this principle in the area of information system design are the break out the data management into Database Management Systems(DBMSs) and the separation of the business logic from the application logic into Business Process Management Systems (BPMSs). However, separation of cross-cutting concerns from the core-concern of a business process is not yet supported in the Business Process Management (BPM) area. Aspect Oriented principle recommends such a separation. When looking into the business process, several concerns, such as security and privacy, can be identified. Therefore, a formal model that provides a foundation for enabling BPMSs to support separation of concerns in BPM area is needed. This thesis provides a formal model for dealing with separation of concerns in the BPM area. Implementing this model in BPMSs would facilitate the design and implementation of business processes with a lower level of complexity, which in turn would reduce the costs associated with BPM projects. The thesis starts with a literature review on aspect orientation both in programming and in the BPM areas. Based on this study, a list of requirements for an Aspect Oriented Service for BPMSs is compiled. Then a formal model for such a service, fulfilling a set of these requirements, is designed using Coloured Petri Nets and implemented in CPN Tools. The model is evaluated through the execution of a number of scenarios. The solution is also validated through an industrial case study. The results of the case study are presented the direction for future work outlined. The case study demonstrates that separation of concerns through aspect orientation does indeed reduce the complexity of business process models.

published_or_final_version / Medical Sciences / Master / Master of Medical Sciences

published_or_final_version / Industrial and Manufacturing Systems Engineering / Master / Master of Philosophy

No description available.