The orientation completion problem for a hereditary class C of oriented graphs asks whether a given partially oriented graph can be completed to a graph belonging to C. This problem was introduced recently and is a generalization of several existing problems, including the recognition problem for certain classes of graphs and the representation extension problem for proper interval graphs. A local tournament is an oriented graph in which the in-neighbourhood as well as the out-neighbourhood of each vertex induces a tournament. Local tournaments are a well-studied class of oriented graphs that generalize tournaments and their underlying graphs are intimately related to proper circular-arc graphs. Proper interval graphs are precisely those which can be oriented as acyclic local tournaments. The orientation completion problems for the class of local tournaments and the class of acyclic local tournaments have been shown to be polynomial-time solvable. In this thesis, we characterize the partially oriented graphs that can be completed to local tournaments by finding a complete list of obstructions. These are in a sense the minimal partially oriented graphs that cannot be completed to local tournaments. We also determine the minimal partially oriented graphs that cannot be completed to acyclic local tournaments. / Graduate

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This paper is studying what kind of mental factors could possibly affect esports players. Qualitative data collection method was chosen for the paper’s method. Thus, we gathered 5 individuals that were, or is in the professional esports scene and interviewed them. With the information we gathered from the interviews we could see that most of our expectation about the mental factors were right. This paper will bring up some mental factors that affects the players from their parents, spectators of esports, other competitors and what they do to handle the different factors.

The objective of this thesis is to investigate the initial allocation of pollution permits in a dynamic tradeable market. Tradeable pollution permit markets are an increasingly common method of environmental regulation and it is apparent that future schemes may have a number of repeated compliance periods. It is important to consider how and to what extent the dynamic allocation of pollution permits determines the market efficiency at the equilibrium. This objective is developed in three parts. First, Part I introduces the topic and sets out the current relationships that exist between the initial allocation of permits and market efficiency and finds strong links between the two. It is shown that markets with imperfect competition, transaction costs or multiple periods can result in links between the initial allocation and market efficiency. In Part II, a generalised model is created to investigate the optimality of dynamic permit allocations and finds the dynamic use of grandfathering (free allocation based on emissions information) permits is, in general, sub-optimal. It is argued that alternative dynamic mechanisms should be considered, such as auctions and other relative performance mechanisms. Part II is concluded by an investigation into the link between market efficiency, dynamic initial allocations and firms' lobbying over a permit allocation. Firms have the ability to determine their permit allocation by their choice of emissions and lobbying activity. It is shown that in some circumstances, lobbying activity may alter market efficiency and may result in reductions in social welfare. In Part III, an alternative dynamic allocation mechanism is considered, namely a rank-ordered contest, which can optimally allocate permits and simultaneously accomplish a predetermined secondary policy objective. The thesis concludes with a discussion of the policy implications and future work associated with this research.

Tournament theory shows that a firm may motivate employees by running competitors for rewards either for a group or individualistic schemes. The empirical literature on Tournaments has been grown. However, many studies use no appropriate data. This paper provides the first empirical evidence on three key assumptions in these models using a special case surrounding the incentives for workers in public sector. The dataset contains information from the Coordenacao de Fiscalizacao (i.e., the Inspections Division) of the Secretaria da Receita Federal (SRF) on the bonus program created by the Brazilian government to compensate tax officials for their efforts in collecting taxes and uncovering tax violations. We constructed a larger unbalanced panel data Tax collection containing information upon 110 tax agencies distributed between 10 regions and 45 time period by month, which allowed us to support the predictions raised above. In order to examine the tournaments predictions we emphasize the dynamic of the process taking into account the unobserved heterogeneity and endogeneity problems using appropriate GMM techniques. This enable us to pondered the possible inertia for time adjustments within tax agency, possibly in determining strategies to improve the tax agency performance on the sources most valuable for collection, which supports the hypothesis of learning by doing. The results also demonstrated evidence to support the following tournaments hypothesis: (1) prizes motivate agents to exert effort; (2) number of participants increased as the size of the prize increase; (3) differential in wages and bonus directly affect workers incentives.

Thesis (M.A.)--University of North Carolina at Chapel Hill, 2003. / Includes bibliographical references (leaves 113-114).

Dissertation submitted in fulfilment of the requirements for the degree Master of Technology: Tourism and Hospitality Management in the Faculty of Business at the Cape Peninsula University of Technology 2013 / The continent of Africa hosted the FIFA World Cup™ for the first time in 2010. The historical hosting of Africa‟s first mega-event by South Africa was deemed to be a key opportunity to initiate and promote socio-economic legacies for local South Africans. Therefore, the importance of examining visitor experiences and perceptions of the event cannot be overemphasised. The global struggle for competitive advantage, national reputation or nation branding is in recent times more and more significant as countries compete for attention, respect and trust of investors, tourists, consumers, donors, immigrants and media. Assessing visitors‟ experiences can contribute significantly to knowledge management and inform the planning of future events to leverage positive benefits while minimising the negative impacts. In this study, visitors‟ perceptions of the event are examined using Nelson Mandela Bay / Port Elizabeth (one of the nine [9] host cities for the 2010 event) as a case study. A spatially-based systematic sampling technique was used to interview visitors at fan parks and in the Nelson Mandela Bay Stadium precinct during the 2010 FIFA World Cup™. Face-to-face interviews were conducted and in all, two thousand, two hundred and twenty-five (n=2225) visitors were interviewed. The key findings reveal that many of the visitors came from the key tourism source markets of South Africa (the United Kingdom [UK], Germany, the Netherlands, the United States of America [USA] and France), were men and had an average age of thirty three (33) years. They generally had positive perceptions about the hosting of the event and the quality of tourism facilities and services on offer during their stay in Nelson Mandela Bay / Port Elizabeth, and South Africa generally. Additionally, many visitors suggested that the hosting of the event in Nelson Mandela Bay / Port Elizabeth offered an opportunity to experience a different tourism destination, with potential for future repeat visitations. However, the city was found to be a poor responsible tourism destination and as not being a good value-for-money destination. During the event, the Nelson Mandela Bay / Port Elizabeth region arguably drew its biggest international crowd as it usually receives fewer international tourists when compared to other regions in South Africa. The study therefore underscores the need for local tourism authorities to devise strategies aimed at capitalising on the exposure garnered through the hosting of the event and at maximising the opportunity to tap into new tourism markets with a view to increasing international visitation in a province that is said to attract only five percent of South Africa‟s international visitors.

Thesis (MTech( Tourism and Hospitality Management))-- Cape Peninsula University of Technology, 2011 / South Africa goes down in the annals of African history as the first nation on the continent to host an edition of the Fédération Internationale de Football Association (FIFA) World Cup in 2010. The event has been well publicised by the host nation as an “African World Cup”, with a number of economic, socio-cultural and political legacies projected for all of Africa’s citizens. Such a scenario has triggered hope of anticipated benefits in the minds of such citizens. In this light, several studies in relation to mega-events and the 2010 FIFA World Cup™, linked to perceptions of the event impact on relevant stakeholders, has mainly targeted local South African communities. Given that the event was designed and planned within the framework of an African affair, and with South Africa’s demographic groups being inclusive of resident African immigrants, the study attempted to determine the perceptions of such immigrants residing in Cape Town with respect to the 2010 FIFA World Cup™ and its associated African legacy. The study was conducted before the hosting of the World Cup and the assessment was therefore prospective. In all, 450 questionnaires were administered to respondents in different areas in Cape Town by means of the simple convenient sampling method. Of such questionnaires, 406 were deemed usable and therefore formed the sample size for the study. The key findings of the study in terms of demographic profile reveal the average age of respondents to be 30 years, with more men than women participating in the study. Although the study confirms the male domination of football in terms of participation, increased participation by women is noted in the study. Furthermore, the findings also indicate a high level of participation of resident African immigrants in Cape Town during the 2010 FIFA World Cup™, as spectators, volunteers and operators of small businesses. Most respondents perceived the event as generating positive economic benefits for South Africa and the African continent as a whole. However, the respondents noted concerns regarding the issues of crime, the disruption of daily lives and the increase in the price of goods and services that could result from the hosting. Findings further revealed that a slight majority of respondents were aware of the projected African legacy of the 2010 FIFA World Cup™. The study provides the basis for future research into the perceptions of African immigrants in relation to sport mega-events in Africa. The different roles assumed by such immigrants and the initiatives undertaken in preparation for the event warrants a post-event assessment with a view to determine any shift in perceptions and expectations that might pave the way for a comparative analysis to be done.

Dissertation submitted in fulfilment of the requirements for the degree Master of Technology: Tourism and Hospitality Management in the Faculty of Business at the Cape Peninsula University of Technology / The 2010 FIFA World CupTM was hosted for the first time on the continent of Africa. The importance of understanding residents’ perceptions of such mega-events is key. Most studies that have previously been commissioned on residents’ perceptions have focused on the pre-event, with only a few focusing on what transpired post-event, as regards the legacy impacts associated with a mega sport event of that nature. This study focuses on the residents’ perceptions of the 2010 FIFA World CupTM in Port Elizabeth (one of the nine host cities of the 2010 tournament), with the view to compare pre- and post-event impacts. Both qualitative and quantitative methods of data collection were used in the study. The survey population of interest, included residents living within a two kilometre (2km) radius of the Nelson Mandela Bay Stadium. The sample size (n=700) of questionnaires that was collected (with 350 each for pre- and post-event) was administered in face-to-face interviews that were conducted with the respondents. The results showed significant statistical differences and similarities between the pre- and post-event responses in relation to key socio-economic variables. Shifts in perceptions were noted in terms of comparing both event phases. Post-event, residents displayed a more positive perception of the impact of the event. The study recommends the need to develop legacy indicators to track, monitor and determine the long-term effects of the event. In addition the necessity for a longitudinal study that measures changes in perceptions over time is essential.

Orientador: Caio Jose Colleti Negreiros / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica / Made available in DSpace on 2018-08-08T09:41:20Z (GMT). No. of bitstreams: 1 Bressan_JoaoPaulo_M.pdf: 1270495 bytes, checksum: 690edfeed4929635ff181ad3063aaadb (MD5) Previous issue date: 2007 / Resumo: O objetivo deste trabalho é estudar a relação existente entre holomorfia e harmonicidade de aplicações f : M 2 (IF; J; ds2? ), onde M 2 é uma superfície de Riemann compacta, orientável e IF é a variedade bandeira maximal. Para isto, apresentamos parte da teoria geral de aplicações harmônicas e holomorfas, necessária para demonstrar o teorema de Lichnerowicz. Uma de suas conseqüências é uma ferramenta importante neste estudo, pois fornece o seguinte critério: se f é J-holomorfa e ds2? é (1,2)-simplética, então f é harmônica. Portanto, também estamos interessados em descrever as métricas (1,2)-simpléticas nas variedades bandeira. Primeiramente, no caso geométrico, estudamos a variedade bandeira complexa maximal de subespaços encaixados IF(n). Posteriormente, este estudo é generalizado para outras variedades bandeiras maximais IF, definidas através de álgebras de Lie semi-simples complexas. Ainda, demonstramos o teorema de Burstall-Salamon, que fornece propriedades da estrutura quase complexa invariante J através de um torneio ?J associado. Finalmente, exibimos as equações de Cauchy-Riemann e de Euler-Lagrange para estas aplicações, e apresentamos exemplos de famílias de funções equi-harmônicas / Abstract: The goal of this work is to study the relationship bettwen holomorphicity and harmonicity of maps f: M 2 (IF; J; ds2? ), where M 2 is a compact, orientable Riemann surface and IF is the full-flag manifold. With this pourpose, we present part of the general holomorphic/harmonic maps theory, which is necessary to prove the Lichnerowicz theorem.It states like consequence a criterion, which is an important tool in this study: if f is J-holomorphic and ds2? é (1,2)-symplectic, then f is harmonic. Therefore, we are interested in to describe (1,2)-symplectc metrics on the flag manifold.Firstly, in the geometrical case, we study the complex full-flag manifold IF(n). Later, we generalize this study to other full-flag manifolds IF, which is defined through complex semisimple Lie algebras. Also, we prove the Burstall-Salamon theorem, which gives some properties of the almost complex structure J through an associated tournament ?J. Finally, we show-up the Cauchy-Riemann equations and the Euler-Lagrange equations to this maps, and present examples of families of equi-harmonic maps / Mestrado / Mestre em Matemática