Diagonally dominant matrices arise in many applications. In this work, we exploit the structure of diagonally dominant matrices to provide sharp entrywise relative perturbation bounds. We first generalize the results of Dopico and Koev to provide relative perturbation bounds for the LDU factorization with a well conditioned L factor. We then establish relative perturbation bounds for the inverse that are entrywise and independent of the condition number. This allows us to also present relative perturbation bounds for the linear system Ax=b that are independent of the condition number. Lastly, we continue the work of Ye to provide relative perturbation bounds for the eigenvalues of symmetric indefinite matrices and non-symmetric matrices.

This thesis is comprised of four studies. The first study aimed to examine the measurement invariance of the Coach-Athlete Relationship Questionnaire (11-item, athlete version CART-Q) employing a total of 1,363 athletes from Belgium (n =200), Britain (n =382), China (n =200), Greece (n =115), Spain (n =120), Sweden (n =169), and the United States of America (n =177). Multi-group mean and covariance structure (MACS) analyses supported the factorial validity of the CART-Q in a three-first order factor model across the seven countries. An examination of the latent mean differences of the CART-Q revealed that there are some variations in terms of the intensity athletes perceive in the quality of the relationship with their coach across the different countries. Overall, these results supply additional evidence of the psychometric properties of the CART-Q and highlight that it is a sound instrument that can be applied cross-culturally. The second study attempted to identify the cultural nuances that exist in Chinese coach-athlete relationships from an derived-emic perspective. Eight-hundred Chinese coaches and athletes completed the long and short versions of the CART-Qs. Results supported the reliability across the CART-Q versions examined, while confirmatory factor analyses only supported the factorial validity of the three-first order factor model of the 11-item CART-Q. The findings indicated that the corresponding aspect of complementarity may not best capture the Chinese coach-athlete behavioural interactions. Thus, it suggested that future research should consider conceptualising and measuring the coach-athlete reciprocal interactions in terms of coaches dominant behaviours and athletes submissive behaviours within Chinese sports context. The third study examined the nomological validity of the 11-item CART-Qs with 350 Chinese coach-athlete dyads. Big-Five personality traits and relationship satisfaction were employed as the criterion variables of coach-athlete relationships. Results revealed: (a) actor effects of personality traits, namely, conscientiousness, extroversion, and neuroticism, on both coaches and athletes perceptions of relationship quality and (b) partner effects of only athletes personality, namely, conscientiousness, extroversion, and neuroticism, on their coaches perceptions of relationship quality. The findings suggested that each relationship member s personality trait contributed independently to relationship quality, because no interaction effects of the coach s and the athlete s personality traits on relationship quality were found. In addition, the findings also supported both actor and partner effects of the coach s and the athlete s perceptions of relationship quality on their satisfaction with training. Based upon the relevant theory and findings generated from the previous three studies, the fourth and final study aimed to fill the gap in the relevant literatures by expanding the construct of complementarity to include coach-athlete reciprocal behaviours, namely the coach s dominant and the athlete s submissive behaviours. Study 4 included 4 phases reflecting the process undertaken to develop and validate the Dominant-Submissive Behaviours Scales. Phase 1 generated a pool of items based on the relevant literatures and feedback from the coaches and athletes; these items were then assessed by three panel groups including academic experts, coaches and athletes. In phase 2 and phase 3, confirmatory factor analysis was used to examine the construct validity, nomological validity, and internal reliability of the developed scales. As a result, the 10-item coach s dominant behaviour scale and the 10-item athlete s submissive behaviour scale were derived. Phase 4 employed athletes from five different countries to assess the cross-cultural validity of the submissive scale, and results supported the full structural invariance of the athlete s submissive behaviour scale across the five countries. Overall, results confirmed the dominant-submissive scale is a valid measure for assessing another dimension of complementarity in coach-athlete relationships. Collectively, this thesis has expanded the current knowledge of coach-athlete relationships to a broader social-cultural context by recruiting coaches and athletes from eight different countries across two continents. It is therefore plausible to conclude that the conceptualisation of the 3+1Cs model and the CART-Q seem to be universal across diverse cultures at a generic level. However, future research needs to continue discovering the universals as well as the variations of human behaviours in the content and the quality of coach-athlete relationships. Key Words: Chinese, dominant, submissive, coach-athlete, relationships, cross-cultural, CART-Q

Marketing literature has propagated “customer-participation” and “co-production” in the seller-buyer framework since the 1970s (Lovelock and Young 1979), yet marketing knowledge gaps exist in this area. Recent management research emphasise the need to re-evaluate how value is created for consumers and to consider the close nature of the interactions between buyers and sellers (Payne et al 2008). Vargo and Lusch’s (2004) proposed service-dominant logic reiterates this need, arguing that the “customer is always the co-creator of value”, as they are part of the system that delivers value. Understanding value co-creation is then important to management research, as it uncovers new opportunities to create “value” for customers. This also enables firms to formulate better pricing strategies. This thesis examines value co-creation attributes and how they may impact on the customer’s willingness to pay. Three studies utilising qualitative and quantitative methods have been conducted to address the research question. The first two studies employed qualitative methods to derive insights into value co-creation attributes from a comparative case study perspective under two different service contexts; the defence and healthcare industries. The third study, conducted under the higher education context, employed quantitative methods to gauge the impact of value co-creation attributes on the customers’ willingness to pay. The qualitative studies found six generic value co-creation attributes, while the quantitative study empirically verified the importance of value co-creation attributes and the fact that they may impact on the customer’s willingness to pay for a service. This thesis validates that value co-creation is important in service provision. As customers become increasingly informed and empowered, a deeper understanding of how customers co-create value with the firm is then central to marketing activities, specifically in how firms design and price their services. Therefore, this thesis contributes to marketing knowledge by proposing value co-creation attributes that have both theoretical and managerial implications.

Democratization is a fragile process, easily reversed when and where its advance is most recent. African countries present particular challenges to democratization, given generally low levels of economic and social development, often combined with ethnic and cultural fractionalization. Debates about democratization have not been sufficiently developed with the African context in mind. In particular, assessment of the effects of presidential systems on democratization has not been sensitively applied to African cases where most regimes are Presidential. Moreover, a particular feature of African democracy, the dominant party within a multi-party system, also raises questions that have not been so pertinent elsewhere. Debates about the merits and demerits of electoral system options for democratic consolidation also require more empirical analysis in Africa. This study is based on the assumption that debates about the relationship between political institutions and democratization in Africa can only be advanced by recognition of the interactions that can be identified between the institutions of presidential, parliamentary and party systems, particularly within the dynamics of one-party dominance. Empirical leverage takes advantage of an important case with a parliamentary system and proportional representation: South Africa. The most appropriate comparator from the Presidential and majoritarian camp is Nigeria. These are the two largest and most important states in Africa, sharing a British colonial heritage and a federal system and each dominated by a single party for about two decades. The thesis conceptualizes democratization in terms of legitimation and institutionalization. Legitimation focuses on the micro-level: the quality of elections and the voting process, the presence or absence of government-sponsored violence or coercion, the extent of public confidence in politicians and public support for democratic principles and practices. Institutionalization is focused at the macro-level: elite compliance to constitutional norms, political accountability, and the absence of violent intervention against the state, by the military or other internal forces. The thesis finds that leadership transitions within the parties take place with more accountability in South Africa than Nigeria. While corruption is a problem in both countries, it is more pervasive and there are more incentives to generate it in Nigeria due to a combination of the candidate-centred nature of politics, the country’s great dependence on oil exports, and its lower accountability in leadership transitions. Mechanisms to promote consensus politics differ in both countries and within-party arrangements call into question an assumption that one-party government is necessarily majoritarian. Although the process of legitimation has advanced well in both countries, they share many problems associated with lack of development. The main threat to democracy in Nigeria lies partly in the mutual distrust occasioned by the unsettled issues of ‘power rotation’, ‘resource sharing’ as well as the widening economic disparity between regional blocs of the principally Islamic North and largely Christian South with possible central state responses that might increase rather than reduce the conflicts, while in South Africa the threat lies in the high level of inequality between the white and black communities. Radical political action to address this inequality might increase the already high level of violence in the country. Such tension could ultimately lead to the break-up of the ANC, but an end to dominant-party politics in South Africa could as well destabilise rather than consolidate democracy. Similarly, in Nigeria, a break-up of the PDP, which has been nearly made possible due to a crisis of confidence in an ‘elite consensus’ on power rotation among the regional blocs, could as well constitute a threat to democratic consolidation and national integration.

Purpose The purpose of this thesis is to develop a holistic understanding of customers’ value perceptions and experiences within the online apparel industry. In doing so, the authors’ hope to develop managerial guidelines for companies to utilize. This will be done with a customerdominant logic approach. Design/Methodology/Approach As the study aims to understand behavior and perceptions, the authors have used an inductive, qualitative method to gain the deepest possible customer insight. By using a case study, the authors have been able to further understand the given context. Using focus group interviews resonated in the authors aim to understand why the participants reasoned as they did, as they would in a focus group session argue for their standpoint. The interview template was influenced by the theories on value formation within customer-dominant logic. Findings This study strengthens the relevance of CD logic empirically and provides a deeper understanding of customers’ value perceptions and the reasons behind them. Functional elements of value were proven to be important, yet it was the values derived of emotional and life-changing elements that created true value. Based on the findings of this study, the authors have proposed a new term, true value, which refers to a state-of-mind in which a person finds in psychological well-being through the experiences derived from a product or service. Furthermore this study highlights social media’s importance within the given context. Originality/Value Previous research on customer-dominant logic has mainly been on a theoretical level. This research contributes to service research by studying the phenomena through empirical research within the online apparel industry. Furthermore, this research develops managerial guidelines for companies applying customer-dominant logic within the given context. Research Implications/Limitations Awareness of the importance of social media within the online apparel industry can provide insight and assist businesses in shaping marketing strategies. This research was limited by time, demographical group and geographical location. Furthermore, the generalizability of the results is limited to the given context.

Ägarstruktur har konstaterats vara en viktig del i ett bolags styrmekanism och det har sedan länge pågått en debatt kring vad som karakteriserar en optimal ägarstruktur. Ägarskapet sägs ha en varierad grad av påverkan beroende på typ av dominant ägare. Vi undersöker hur två av de största ägartyperna, familjeägande och institutionellt ägande, påverkar ett bolags värdeskapande när de anses vara dominanta ägare. Urvalet består av 216 icke finansiella bolag listade på Stockholmsbörsen mellan 2010–2015. Resultatet undersöks genom en OLS-regression och visar att både familjeägande och institutionellt ägande har ett positivt samband med ett bolags värdeskapande. Undersökningen studerar även huruvida graden av ägarkoncentration, användandet av röstdifferentierade aktier och aktivt familjeägande påverkar ett bolags värdeskapande.

Telomerase is a ribonucleoprotein that is reactivated in cancer cells to allow for continuous cellular division and indefinite growth. With telomerase being expressed in more than 85% of all cancer, it is imperative that we understand how to selectively inactivate and degrade this unique DNA polymerase. In doing so, we can specifically target tumor cells to erode their telomeres so that they will undergo apoptosis or senescence. Through this research, we have learned that telomerase can be degraded in the nucleoplasm by Hsp90 chaperone inhibition and in the cytoplasm by the dominant negative mutant, D712A V713I. These findings should guide future drug design to target sites on telomerase that interact with Hsp90 and catalytic divalent metal ions. Previous studies have shown that chaperones function to stabilize the RNP and that their inhibition results in ubiquitin-mediated degradation. However, a detailed understanding of how telomerase is signaled for degradation is not well defined. We showed that Hsp90 inhibition causes telomerase to be degraded by a nuclear ubiquitin/proteasome pathway such that exportation to the cytoplasm is not required. Using confocal fluorescence microscopy and immunoprecipitation /Western analysis, we showed that nucleoplasmic GFP-hTERT is ubiquinated and degraded within 2 hrs of exposure to the Hsp90 inhibitor, Radicicol. Upon combined treatment with the proteasome inhibitor, MG132, degradation is inhibited as shown by Western analysis and fluorescent intensity. Additionally, fluorescent pattern with inhibition of degradation shows telomerase aggregation and co-localization with the nuclear proteasome and not with nucleoli. However, the combined treatment with the exportin inhibitor, Leptomycin B, resulted in complete loss of fluorescence. Taken together, these data suggest that Hsp90 inhibition causes telomerase to immediately undergo nuclear degradation, which may function in the nuclear quality-control of telomerase. The dominant negative expression of telomerase has been shown by many investigators to cause shortening of telomeres. However, the mechanism of how it functions and its fate inside the cell are still unknown. After stably expressing the wild-type and dominant negative mutants GFPhTERT in cells, we show that the D712A V713I mutation causes the ubiquination and degradation of the mutant and wild-type hTERT which eventually leads to the shortening of telomeres. Degradation appears to be cytoplasmic since the additional mutation for the nuclear export signal (nes) and treatment with the exportation inhibitor are able to prevent the reduction in protein levels and fluorescence. Based on this cytoplasmic degradation and the additional co-localization of the GFPDNhTERT to the nucleoli, we propose two new mechanisms of dominant negative hTERT utilizing the theory of interactive dimerization. First, the heterodimer of DNhTERT : wt hTERT may be degraded at a faster rate than the wt hTERT homodimer. Second, the heterodimer may be sequestered in the nucleoli thus diminishing the wild-type hTERT access to the telomere in the nucleoplasm. Overall, we have shown that telomerase can be degraded in the nucleoplasm or cytoplasm depending on the mechanism of inhibition. The significance of this is a better understanding of how Hsp90 inhibition and dominant negative hTERT expression cause the degradation of wild-type hTERT. We have also suggested potential mechanisms of dominant-negative hTERT effect and resistance. With this knowledge, future drug therapies can be designed based on these inhibitors to not only inactivate but also to cause the degradation of an enzyme that is crucially important for the immortalization of cancer cells.

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

Abuse of a dominant position - the concept of abuse and modes of abusive conduct Abstract This thesis deals with an abuse of dominant position, specifically with concept of abuse as such and subsequently with individual abusing practices. Article 102 TFEU as well as § 11 ZOHS do not define concept of abuse, it is therefore necessary to analyze case law for their understanding. The same apply in case of individual abusing practices. This analysis is fitted into the wider framework which consists in exploring the object of Article 102 and the method of its application, particularly in regards to Commision's effort to modernization. The main aim of the thesis is critical reflection of case law in the context of searching of purpose of Article 102, not comprehensive and detailed review. The thesis is composed of three chapters. Chapter One characterizes basic objectives of Article 102 and method of its application. Due to brief text of Article 102, the objects of the Article are really crucial for its interpretation and application. In the same way assessment methods can fundamentally change and shift use of Article 102. Basically there are two different objectives and two different methods. Objectives are ordoliberal economic freedom protecting competition as a process and consumer welfare pursuing growth of...

Protection of business competition - Abuse of dominant position The main objective of this thesis is a comprehensive analysis of the term "abuse." In a wider complex, thesis deals with a question of the present aim and prevailing method of application of provision 102 TFEU in order to find out whether and if yes, to what extent is current approach compatible with the modernization process of the application of article 102 TFEU declared by the Commission. Thesis deals with a question whether decisional practise is capable to react on a challenge made by so called new economy sector. Thesis consists of five substantial chapters. The first chapter sums up historical development of the 102 prohibition in Europe and USA law with a particular focus on the objective behind the text of the relevant provisions and decisions and its changes in time. The second chapter zooms to modernization process in relation to Art. 102. The central chapter analyses in detail the features of the general definition of an abuse arising from the decision of Hoffmann-La Roche, namely: i) a special responsibility of the undertaking; ii) the objective nature of the abuse and the effect of conduct on competition; iii) competition on the merits. An analysis of the concept of anticompetitive foreclosure follows. The concept of...