Project (M.P.P.) - Simon Fraser University, 2006. / Theses (Master of Public Policy Program) / Simon Fraser University. Also issued in digital format and available on the World Wide Web.

The purpose of this study is to understand and analyze why individuals develop and manage to leave drug abuse. The material consists of interviews with eight individuals who have gone through a life of addiction and managed to change their lifestyle. We contacted the participants through the organization called KRIS (Criminals Redress with Society). The results indicate that the participants have had a troublesome upbringing and been labeled by society as outsiders which have led them into addiction. The results also show that they have all gone through a social conversion from the life as an addict to become sober. The results of our study are analyzed with Jonsson and Bergström’s theory on social in heritage and Becker and Andersson’s view of outsiders and qualifications for drug abuse. The results are also analyzed with Ebaughs theory on role-exit. What we would like to contribute is an understanding of how an individual enters addiction and how they manage to leave drug abuse.

This study sought to investigate the relationship between safety voicing and employee turnover. A model of the safety exit interview process was developed, along with reasons why conducting a safety exit interview may help improve workplace safety. A generic safety exit survey template was developed and administered to a sample of workers previously employed in high safety risk occupations. 126 participants completed the study measures. The type of information which the safety exit survey elicited is described. Results found clear evidence that safety concerns had influenced participants to leave their previous job. It was also found participants wished to voice these safety concerns at exit, but for some reason they could not or chose not to do so. Results also support the predictions that management and co-worker trust and support for safety, would be negatively associated with voicing within the safety exit survey context. Support was also found for the prediction that management trust and support for safety, would be positively associated with the actual voicing of safety issues on the job. Overall, this study seeks to improve workplace safety through encouraging the use of a safety exit interview.

Masters Research - Masters of Engineering / Mobile telephony, wireless networks and wireless telemetry systems have gone from simple single-input single-output wireless architectures with low data transmission rates to complex systems employing multiple antennas and forward error correction algorithms capable of high data transmission rates over wireless channels. Claude Shannon provided the fundamental capacity limits for a communications system and it can be shown that the capacity for a single-input single-output systems is limited in it’s capability to provide for modern wireless applications. The introduction of multiple-input multiple-output systems employing multiple antenna elements and orthogonal coding structures proved beneficial and could provide the capacities required for modern wireless applications. This thesis begins with an introduction and overview of space-time coding and the codes of Tarokh, Jafarkhani and Alamouti. Further, this thesis provides an introduction and overview to the family of forward error correction codes known as low-density parity-check (LDPC) codes. LDPC codes, when employed over Gaussian channels, provide near-Shannon limit performance and the question is posed as to their suitability for a wireless multiple-input multiple-output system employing multiple antennas and space-time coding. This question is answered by the use and demonstration of LDPC codes as outer codes to a MIMO system employing space-time block codes and a modified maximum-likelihood decoder. By modifying the space-time block-code decoder to provide a soft-information output, iterative decoders such as the sum-product algorithm can be employed to provide significant performance gains over a Rayleigh flat-fading channel. Further the use of design tools such as EXIT charts can then be used to design codes. The key to allowing the use of EXIT charts is the observation that a MIMO system employing orthogonal transmissions in a Rayleigh flat-fading channel is the equivalent to a SISO channel employing Nakagami-m fading coefficients. The seemingly complex MIMO system can now be analyzed in the form of a simpler SISO equivalent allowing the use of techniques such as EXIT charts to be employed in order to design codes with known and predictable performance haracteristics. This thesis demonstrates this technique and shows by example the performance gains that can be achieved for MIMO systems and opens some further questions for future research.

Masters Research - Masters of Engineering / Mobile telephony, wireless networks and wireless telemetry systems have gone from simple single-input single-output wireless architectures with low data transmission rates to complex systems employing multiple antennas and forward error correction algorithms capable of high data transmission rates over wireless channels. Claude Shannon provided the fundamental capacity limits for a communications system and it can be shown that the capacity for a single-input single-output systems is limited in it’s capability to provide for modern wireless applications. The introduction of multiple-input multiple-output systems employing multiple antenna elements and orthogonal coding structures proved beneficial and could provide the capacities required for modern wireless applications. This thesis begins with an introduction and overview of space-time coding and the codes of Tarokh, Jafarkhani and Alamouti. Further, this thesis provides an introduction and overview to the family of forward error correction codes known as low-density parity-check (LDPC) codes. LDPC codes, when employed over Gaussian channels, provide near-Shannon limit performance and the question is posed as to their suitability for a wireless multiple-input multiple-output system employing multiple antennas and space-time coding. This question is answered by the use and demonstration of LDPC codes as outer codes to a MIMO system employing space-time block codes and a modified maximum-likelihood decoder. By modifying the space-time block-code decoder to provide a soft-information output, iterative decoders such as the sum-product algorithm can be employed to provide significant performance gains over a Rayleigh flat-fading channel. Further the use of design tools such as EXIT charts can then be used to design codes. The key to allowing the use of EXIT charts is the observation that a MIMO system employing orthogonal transmissions in a Rayleigh flat-fading channel is the equivalent to a SISO channel employing Nakagami-m fading coefficients. The seemingly complex MIMO system can now be analyzed in the form of a simpler SISO equivalent allowing the use of techniques such as EXIT charts to be employed in order to design codes with known and predictable performance haracteristics. This thesis demonstrates this technique and shows by example the performance gains that can be achieved for MIMO systems and opens some further questions for future research.

The hospitality and tourism industry is an increasingly important part of the New Zealand economy, contributing almost nine percent of the Gross Domestic Product in 2008. One of the key concerns regarding this part of the economy is the impact of a tight labour market and intense skill shortages on its ability to maximise returns from tourists. Labour turnover rates have been extremely high in the hospitality sector over the past few years and this has contributed to the intense labour market pressures affecting this industry. Hotels have suffered particularly high turnover rates in the past few years and exit interviews have been one of the tools that Human Resource Managers used to try and gain data about employee reasons for leaving. This study looks at exit interviews as a source of data on the causes of labour turnover in two New Zealand hotel chains. The aim of this study was to analyse hotel exit interview data in order to identify significant patterns that might illuminate the causes and potential moderating factors of labour turnover in New Zealand hotels. In addition, the study aimed to analyse the processes used to gather exit interview data in order to evaluate the efficacy of exit interviews and see if any practical recommendations could be made regarding the use of exit interviews to address labour turnover. A qualititative, triangulated research methodology was applied in order to analyse the data generated from over 4500 exit interviews, from 17 hotels, in two New Zealand hotel brands. The interviews cover six years of exit interview gathering. In addition, in depth semi-structured interviews with six hotel Human Resource Managers were used to gain insight into the practice and perceptions around exit interviews. The study found that despite considerable application of time and resources, hotels gain very little benefit from the exit interview process. Several issues are identified as bringing the efficacy of exit interviews into question, including power imbalance between interviewees and interviewers, language and cultural concerns, and the impact of psychological contract breaches on the employment relationship. In addition, the study found that even when opportunities for organisational improvement did arise from exit interviews, little or no action was taken by the hotels in question. The study concludes that there is insufficient benefit to the hotels given the costs of exit interviews and suggests that other forms of employee feedback, such as engagement surveys may be more efficacious in addressing labour turnover.

I investigate why Taiwanese entrepreneurs who have invested in China exit. Viewed from the non-economic perspective, there are three main themes in this thesis. Theme A focuses on the non-economic variables in international exit. Theme B examines how incident-generated emotions shape entrepreneur’s actions in internationalization. Theme C presents an overview of the decision-making of international exit, summarizing the finding in Theme A and Theme B and revisiting the theoretical framework developed in literature chapter. Driven by the nature of the research questions, a multiple-case study methodology was adopted for the purpose of theory building. I employ the method of critical incident technique to explore firm’s critical events in internationalization and how entrepreneurs feel and respond to. In total, I identify five exit cases and two stay cases. 34 semi-structured in-depth interviews were conducted with entrepreneurs and their stakeholders. Data was coded in an interactive manner, working back and forth between theory, emerging patterns and data. Other sources including annual reports, press release, webpage, meeting minutes and archives are used for data triangulation. Being positioned at the intersection of entrepreneurship and international business research paths, this research firstly examines international business literature and use theories in entrepreneurship field to explain my data. Following Gimeno et al.’s (1997) threshold of performance theory, entrepreneurs can terminate an economically profitable business since it no longer meets entrepreneur’s expectation. My finding shows in addition to organizational performance, entrepreneur’s personal goal, predisposition of China and family socio-emotional wealth can influence the international exit decision by changing entrepreneur’s threshold of performance and the non-economic value of the firm. This explains why some entrepreneurs shut down a profitable firm. Following entrepreneurial emotions literature (e.g. Baron, 2008; Foo et al., 2009), I examine how entrepreneur’s incident-generated emotions shape their behaviour in internationalization. Passion and confidence are positive for organizational growth while fear and disgust are negative for entrepreneur’s efforts in internationalization. Empathy is positive for learning and adaption and anger encourages risky actions with optimistic prediction. This section provides empirical evidence to entrepreneurial emotion studies and connects empathy with entrepreneur’s learning and development of institution-specific capability. Finally, I revisit the international exit decision-making framework and redefine international exit. My finding shows entrepreneurs who have positive emotional memory and predisposition of China are easier to recover and learn from their international exit experience and use it to renter into China in the future. Taken together, this thesis provides fresh insights into an emerging debate relating to international exit, particularly on emerging market studies. It contributes to the international business literature by viewing from non-economic perspective, indicating why some entrepreneurs persist in a failing venture while others shut down a profitable venture. This research also adds to entrepreneurial emotion literature by providing an insight to positive and negative emotions and focusing on specific emotions rather than a broad category, describing six emotions and their effects on entrepreneur’s decision in internationalization. Implications for practitioners and policy makers are also discussed.

In this thesis, our aim is to study a Cournot tatonnement system which exhibits destabilisation of the Cournot equilibrium as the number of firms increase. Our approach is to first consider the special case of firms behaving identically in a market share attraction model in two different adjustment process: Cournot tatonnement and bounded rationality adjustment. Results from the Cournot tatonnement system shows a superstable equilibrium in two firms model and an unstable equilibrium in a five firms model. In the five firms model, we show that introducing heterogeneity stabilises the Cournot equilibrium. For both two and five firms model, the differences of costs between firms are critical for the convergence of the system to the Cournot equilibrium. Lastly, we study the effect of entries and exits of firms on the number of active firms in the market. We discover that the market can sustain between two to four firms, and the factors are differences of costs and initial outputs between firms, and barriers to entries.

Title: ”… Then came the realization that I was just like them. That I have a gambling addiction…” This is a qualitative study of four former gamblers and their experience of getting out of the gambling addiction. The study is about how individuals have overcome a gambling addiction. The purpose of this study is to examine the social processes and factors that are of importance when overcoming a gambling addiction. In addition, the study focuses on how individuals experience the change from gambling addiction to a life free of that addiction. In this thesis, I conducted a qualitative study in the form of semi-structured interviews with four former gamblers. The theoretical approach concentrated on Ebaugh’s (1988) role exit theory and Giddens’ (2005) identity formation theory has been used to illustrate the interviewees' experiences of gambling addiction and their identity as addiction free. The study shows that the gambling addiction has brought economic, social and health-related impacts and some of these aspects still exist today. The exit out of a gambling addiction has been a process with different phases and events where the process for some has been incrementally with relapses during the journey. Based on my results, the changing process appears to consist of parallel turning points where different and more significant events give rise to role exit. The study shows the need of continuous social support in combination with gambling association support efforts and the gamblers’ own insight, motivation and freedom of action. It appears that the interviewed have accepted their role that they had left behind and they take careful consideration to the past and the future and try to make more conscious choices and build their new identity. This is done by actions and re- evaluations of themselves and their world. It is based on their lives, by their own choices. However, these choices seem to be limited by conditions that occur in the interaction with the environment, social norms and social situations.

A doença de Alzheimer (DA) e a demência vascular (DV), especialmente a sua forma subcortical, são responsáveis pela maioria dos quadros de demência em idosos, nem sempre facilmente diferenciadas do ponto de vista clínico. O objetivo do estudo foi comparar o desempenho de pacientes com DA e com DV em uma bateria breve de testes cognitivos (Mini-exame do estado mental e bateria Neuropsi para confirmar o diagnóstico de demência; CLOX 1 e 2, fluência verbal categoria animal e fonêmica, EXIT 25 e teste de memória tardia da bateria breve de rastreio cognitivo), e verificar seu valor no diagnóstico diferencial entre elas. O desempenho do grupo DV foi inferior ao DA nos testes: CLOX 2, fluência verbal animal e fonêmica. O grupo DA obteve desempenho inferior a DV no subitem evocação do teste de memória tardia. / Alzheimer’s disease (AD) and vascular dementia (VaD), especially its subcortical form, are responsible for the majority of dementia cases in the elderly and are not always easily differentiated from a clinical point of view. The aim of this study was to compare the performance of mild VaD and AD patients in a series of brief cognitive tests (Mini-mental State Examination and Neuropsi battery, in order to confirm the diagnosis of dementia; CLOX 1 and 2, category and letter fluency, a delayed recall test of 10 simple figures and the EXIT 25), and to evaluate the potential use of these tests for the differential diagnosis between them. The performance of the VaD group was significantly impaired, in relation to the AD group, in the tests CLOX 2, category verbal fluency and letter verbal fluency, while the AD patients performed significantly worst in the delayed recall test.