Given a matrix A in F(t)[D;\delta]^{n\times n} over the ring of differential polynomials, we first prove the existence of the Hermite form H of A over this ring. Then we determine degree bounds on U and H such that UA=H. Finally, based on the degree bounds on U and H, we compute the Hermite form H of A by reducing the problem to solving a linear system of equations over F(t). The algorithm requires a polynomial number of operations in F in terms of the input sizes: n, deg_{D} A, and deg_{t} A. When F=Q it requires time polynomial in the bit-length of the rational coefficients as well.

This study explores how middle-aged homeless persons in Atlanta, GA, who have harmful, self-identified addictive behaviors come to make positive material and psychological changes, while constrained by urban poverty and structural violence. This study is divided into two parts. In part one, I examine the interaction between individual, social, and material factors that promote recovery from addiction in a poor, urban context. I argue that recovery occurs through a process, initiated by a decision and realized through practice. Recovery is enhanced by a stable community and consistent material access. In part two, I examine how pain associated with homelessness can create a strong drive to intensify substance usage as a means to seek relief. I then describe how alienation, pain and corresponding addictive behaviors among homeless persons can be lessened through intentioned, empowering acts, which I call “symbolic love”. Finally, I offer policy recommendations based on my findings.

Leadership represents a diverse and dynamic area of study, occupying a vast area in sociological literature. However, the nonprofit sector is somewhat neglected in literature that examines leadership as a performance. Heightened demand for accountability, funding shortages and other challenges in the nonprofit sector have spurred recent trends such as coalition-building and business-like practices. Nonprofit leaders must satisfy multiple internal and external stakeholders with opposing values and expectations. This creates a rich and yet incomplete area in which to study impression management. This thesis employs an interpretivist perspective, specifically utilizing symbolic interactionism to understand how the participants create and maintain impressions. By employing Erving Goffman’s dramaturgical metaphors, this thesis addresses how the participants use symbolic representations of leadership in order to create desired impressions. It also explores the strategies used by the participants in order to present a front of competent leadership during the interviews. Lastly, the research asks the participants to reflect on their impression management activities. To address these questions, 19 leaders were interviewed at 11 different nonprofits in Canada and in Egypt for approximately one hour each, using face-to-face semi-structured interviews. Simple observation was also applied. A combination of purposive, snowball and convenience sampling was used to select the organizations. iv The research offers a number of significant findings. First, the manner and appearances of the leaders and the design of their office space provides avenues in which to convey leadership, financial and organizational messages, as well as information about the leaders’ roles and statuses. For example, visual cues may be used to express their participative approach to leadership, convey organizational frugality or success and create a corporate culture. Second, the participants commonly self-identified as benevolent and humble “servant leaders” by attempting to appear as mentors. They downplayed their authority and claimed to integrate staff feedback into the organization. They also claimed to employ a benevolent form of discipline that focuses on learning. When discussing mistakes, the participants claimed to respond in an ideal way, by apologizing and learning from their errors. However, they claimed to, at times, act authoritatively and convey “professionalism.” The leaders displayed their authority during the course of the interview and laid claim to qualifications that made them especially suited for the job. These kinds of inconsistencies suggest that impression management is not static or flawless, but rather a series of performances fraught with contradiction and tension. Third, about half of the participants admitted to consciously changing their behaviour, language and appearances in situations in order to build trust with stakeholders. This involves at times appearing “professional” while at other times self-humbling in order to build a shared-identity with others. The participants struggle to appear sincere, but recognize that their impressions are sometimes met with suspicion. There are limitations to the sampling technique and research design. A larger sample that interviewed a group of leaders from one region would be preferable to this small, cross-national one. In this thesis it is impossible to know whether the participants’ claims are warranted. Longitudinal participant observation would enable the researcher to see inconsistencies and also to understand how others interpret the leaders’ impression management attempts. However, the research has many benefits; in addition to contributing to the literature and providing examples of Goffman’s dramaturgical metaphors in the context of nonprofit leadership, this thesis may assist leaders in their goals. This thesis could lead to increased self-reflexivity or sharing of impression management techniques and could potentially assist nonprofit leaders with their tenuous missions.

Given a matrix A in F(t)[D;\delta]^{n\times n} over the ring of differential polynomials, we first prove the existence of the Hermite form H of A over this ring. Then we determine degree bounds on U and H such that UA=H. Finally, based on the degree bounds on U and H, we compute the Hermite form H of A by reducing the problem to solving a linear system of equations over F(t). The algorithm requires a polynomial number of operations in F in terms of the input sizes: n, deg_{D} A, and deg_{t} A. When F=Q it requires time polynomial in the bit-length of the rational coefficients as well.

This study examines a new method for conceptualizing and measuring roletaking ability. Role-taking is defined in a manner that facilitates further theory building and testing. The task of designing and validating a measure of role-taking that departs from the self-evaluative measures currently used is undertaken and validated with an experimental design. A computer-based survey instrument is created consisting of video and written vignettes designed to test subjects’ ability to predict their study partner’s behavior. It is found that one type of vignette is more suitable for measuring role-taking accuracy than is the other. Females, regardless of experimental condition, record higher role-taking scores than do their male counterparts. Subjects’ self-reported role-taking accuracy is not correlated with their actual role-taking accuracy scores. Because this is the case, it leads to a re-thinking of the meaning of studies that use self-reported ability as the sole measure of role-taking ability. An additional finding is that participants seem to overestimate individual differences. Personality factors measured by the Big Five Inventory were not correlated with role-taking accuracy.

Thesis (M.Sc.)--York University, 2007. Graduate Programme in Computer Science. / Typescript. Includes bibliographical references (leaves 153-157). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38783

Brazil was the first country in South America to launch a television network and air television shows. Television programming was designed to develop national capitalism and to foster a national identity. Although Brazil is composed of an overwhelmingly large population of African descent, they are usually underrepresented in mainstream media, chiefly in telenovelas (soap operas). This research examines what happens when a telenovela attempts to portray issues of race relations and tensions in contemporary Brazil. Duas Caras (“Two Faces”), a TV Globo telenovela aired October 1, 2007 to May 31, 2008. The show was a turning point in Brazilian programming because it was the first prime time soap opera to present audiences with an Afro-Brazilian as the main hero. It was also the first novela das oito (“eight o’clock” or “primetime soap opera”) to openly address racial issues through its plot and dialogue. However, in depth critical and theoretical analysis of different episodes demonstrates that instead of debunking the myth of racial democracy, this soap opera in fact helps to further reproduce it through the portrayal of interracial relationships amongst the characters. As shown here, interracial relationships between white and Black Brazilians was used as a strategy of erasing African ancestry traits from the population through a process of whitening. This report combines a traditional textual analysis of Duas Caras with theoretical frameworks about race relations, gender and anti-Black racism in Brazil. The investigation revealed how telenovelas contribute to social ideology and hegemonic discourses in a way that has not been properly recorded. This discussion contributes to Latin American media studies generally, and the scholarship on interracial relationships in Brazilian media particularly. / text

Alzheimer disease (AD) and related dementias affect nearly one in thirteen Canadians over the age of 65. Difficulties in communicating are frequently cited as the greatest source of stress for individuals who have a diagnosis of dementia and their families. Despite the wide recognition that the family is affected by a relative’s diagnosis of dementia, there has been little research aimed at understanding the experience of the family as a unit. The purpose of this study is to gain insight into the family experience of communicating with a relative who has dementia. This study used a qualitative single case study design, drawing on the theory of Symbolic Interactionism. Three members of one family participated in two individual interviews and a family interview. The family member who was experiencing symptoms associated with AD but whose diagnosis was referred to as “cognitive impairment” (CI), participated in one individual interview. Interviews were transcribed and the data was analyzed using constant comparative analysis. The findings that emerged from the data indicate that the participating family approached communication with the intention of achieving three particular goals in their interactions. These goals were to include, protect, and bring happiness to their afflicted family member. Three strategies were identified as the primary strategies used to achieve these goals: interpreting, scripting, and translating. Further, the family was organized in such a way that members were positioned either as part of the ‘core’ of the family or on the ‘outskirts’ of the family. Family members that pursued and achieved the three goals in their interactions with the relative who has CI were considered to be part of the core while others who were not willing or capable of interacting in this way were positioned on the outskirts of the family. Understanding the communication experience of the family as a unit offers a vital link to meet the needs of families dealing with the effects of CI. This knowledge will aid in formulating important new questions and insights for researchers and clinicians to provide the care and support necessary to promote the well-being of families affected by CI.

Web services are pieces of software offering functionalities to other (remote) machines over the Internet that work based on the Service-Oriented Architecture (SOA). They can be invoked by means of Web related standards (usually, SOAP, UDDI, XML, HTTP, WSDL. In the recent years, the usage of Web services has increased due to the flexibility and interoperability among heterogeneous platforms and operative systems that they provide. SOA adds value in terms of low coupling, re-usability of services and sharing; it makes the systems flexible and adaptive in case of changes in the business process and improves the integration of heterogeneous systems. Besides, new ways of using Web services have emerged, by combining them in order to create more complete (and complex) services. This process of re-using and combining Web services is called Web service composition, and its main objective is to allow the re-usability of the functionalities proposed by the Web services. This is why this architecture has been widely accepted by the companies all over the world: it helps reducing the cost and time to create business processes, and this is the type of systems we work with in this thesis, more specifically, we aim at ensuring their correct behavior by using testing techniques in order to detect possible errors.

Within the academic discussion, water is argued to be a ‘multifaceted resource’, yet, the social and cultural dimensions of water have received little attention. Furthermore, authors have highlighted a need to explore the phenomenon from both, the macro and micro level, however, debates regarding water tend to revolve around the former. Following the need for a more local perspective, this study looks into water practices of a household, like using a watering can to irrigate crops or purifying water for consumption, as well as the environment in which these occur. Recognising that change is essential for development, it also explores if improvement of these practices is needed, and how development of these, if so, may be encouraged. One perspective fostering such an understanding is Symbolic Interactionism, focusing on individuals and their behaviour and how this is influenced by their perceived reality and the interaction with oneself and others. This perspective is utilised as the analytical framework in order to explore people’s lives and their experiences. The research was carried out as a field work during April and May, 2013, in Ribáuè, Mozambique. This study concludes that there is a recognised need to develop water practices in order to support and create favourable outcomes for households. One of the factors that this study highlights as important is to acknowledge individuals’ cognitive process in relation to the visible actions performed, emphasising the significance of taking both processes into account when attempting to encourage the development of water practices. For instance, it is advisable to provide not only theoretical instructions, but also to demonstrate and let the individuals carry out new practices. By taking such factors into account, this may strengthen the efforts to encourage a household to develop its water practices. This study also proposes potential perspectives for future research.