See file appended.

[pt] Otimização de portfólio tradicionalmente assume ter conhecimento da distribuição de probabilidade dos retornos ou pelo menos algum dos seus momentos. No entanto, é sabido que a distribuição de probabilidade dos retornos muda com frequência ao longo do tempo, tornando difícil a utilização prática de modelos puramente estatísticos, que confiam indubitavelmente em uma distribuição estimada. Em contrapartida, otimização robusta considera um completo desconhecimento da distribuição dos retornos, e por isto, buscam uma solução ótima para todas as realizações possíveis dentro de um conjunto de incerteza dos retornos. Mais recentemente na literatura, técnicas de distributionally robust optimization permitem lidar com a ambiguidade com relação à distribuição dos retornos. No entanto essas técnicas dependem da construção do conjunto de ambiguidade, ou seja, distribuições de probabilidade a serem consideradas. Neste trabalho, propomos a construção de conjuntos de ambiguidade poliédricos baseado somente em uma amostra de retornos. Nestes conjuntos, as relações entre variáveis são determinadas pelos dados de maneira não paramétrica, sendo assim livre de possíveis erros de especificação de um modelo estocástico. Propomos um algoritmo para construção do conjunto e, dado o conjunto, uma reformulação computacionalmente tratável do problema de otimização de portfólio. Experimentos numéricos mostram que uma melhor performance do modelo em comparação com benchmarks selecionados. / [en] Portfolio optimization traditionally assumes knowledge of the probability distribution of returns or at least some of its moments. However is well known that the probability distribution of returns changes over time, making difficult the use of purely statistic models which undoubtedly rely on an estimated distribution. On the other hand robust optimization consider a total lack of knowledge about the distribution of returns and therefore it seeks an optimal solution for all the possible realizations wuthin a set of uncertainties of the returns. More recently the literature shows that distributionally robust optimization techniques allow us to deal with ambiguity regarding the distribution of returns. However these methods depend on the construction of the set of ambiguity, that is, all distribution of probability to be considered. This work proposes the construction of polyhedral ambiguity sets based only on a sample of returns. In those sets, the relations between variables are determined by the data in a non-parametric way, being thus free of possible specification errors of a stochastic model. We propose an algorithm for constructing the ambiguity set, and then a computationally treatable reformulation of the portfolio optimization problem. Numerical experiments show that a better performance of the model compared to selected benchmarks.

This work deals with Multi-Criteria Analysis which represents an effective tool for solving complex decision-making situations. This paper describes the various methods of multi-criteria evaluation. One of the chapters also focuses on the software support. The main objective of this document is to demonstrate how to apply Multi-Criteria Analysis in real life. The practical part of this study refers to the structural policy and deals with the evaluation of regions of the Czech Republic after its entry into the European Union. The study mainly concentrates on the detailed analysis of South Bohemia region.

The law of contract in South African affords parties the freedom to enter into a contract and who they wish to enter with. The general requirements for a legally enforceable contract are consent, good faith, and the sanctity of contract. The contractual freedom of parties also offers them freedom to choose the terms of their contract. Part of these terms is the freedom to incorporate exemption clauses in contracts. An exemption clause is a waiver of liability or the apportionment of risk in the event of an occurrence materialising as defined in the contract. Exemption clauses have become the norm rather than the exception and parties must therefore expect a contract to contain an exemption clause, albeit unfair. Until recently, there was no legislation that declared exemption clauses as unfair. The Consumer Protection Act is South Africa's first legislative regulation on unfair contract terms and the waiver of liability. The Act does not address the contractual freedom of parties to incorporate exemption clauses and whether they will be unenforceable in the light of section 48. The Act cannot be implemented without considering the freedom of contract to rely on exemption clauses. A literature study will be undertaken in order to establish the influence of section 48 of the Consumer Protection Act on South African law of contract and exemption clauses. / LLM (Import and Export Law), North-West University, Potchefstroom Campus, 2015

The law of contract in South African affords parties the freedom to enter into a contract and who they wish to enter with. The general requirements for a legally enforceable contract are consent, good faith, and the sanctity of contract. The contractual freedom of parties also offers them freedom to choose the terms of their contract. Part of these terms is the freedom to incorporate exemption clauses in contracts. An exemption clause is a waiver of liability or the apportionment of risk in the event of an occurrence materialising as defined in the contract. Exemption clauses have become the norm rather than the exception and parties must therefore expect a contract to contain an exemption clause, albeit unfair. Until recently, there was no legislation that declared exemption clauses as unfair. The Consumer Protection Act is South Africa's first legislative regulation on unfair contract terms and the waiver of liability. The Act does not address the contractual freedom of parties to incorporate exemption clauses and whether they will be unenforceable in the light of section 48. The Act cannot be implemented without considering the freedom of contract to rely on exemption clauses. A literature study will be undertaken in order to establish the influence of section 48 of the Consumer Protection Act on South African law of contract and exemption clauses. / LLM (Import and Export Law), North-West University, Potchefstroom Campus, 2015

Summaries in English and Afrikaans / Text in English / The aim of this investigation was to determine whether values, the style of discipline and father involvement, influence achievement motivation in secondary school pupils. A survey of existing literature on this subject reveals that style of discipline does influence academic achievement. Baumrind's research is a major source of information in this regard. Research also indicates a positive correlation between academic achievement and the father's ability to assume the leadership role in the family. A positive correlation between the choice of values, for example religious, social, etcetera, and academic achievement is indicated in past research on academic achievement. An investigation done in a large rural town in South Africa, however, reveals no significant correlation between the above mentioned factors and academic achievement. However, a negative correlation between achievement and popularity as an important value, suggests that under-achievement is found more frequently among pupils whose parents value popularity highly. / Die doel van hierdie ondersoek was om te bepaal of waardes, die dissiplineringstyl en vaderbetrokkenheid, die kind se akademiese prestasie bei:nvloed. 'n Ondersoek van bestaande literatuur op hierdie gebied, wys daarop dat die dissiplineringstyl, akademiese prestasie bei:nvloed. Baumrind se studie is 'n belangrike bron van inligting in die verband. Navorsing dui op 'n positiewe korrelasie tussen akademiese prestasie en die vader se vermoe om die leierskapsposisie in die gesin te handhaaf Bestaande literatuur oor die onderwerp dui ook daarop dat die keuse van waardes, byvoorbeeld godsdienstige-, sosiale-, ensovoorts, positief korreleer met akademiese prestasie. 'n Ondersoek in 'n groot plattelandse dorp in Suid-Afiika, wys geen beduidende korrelasie tussen die bogenoemde aspekte en akademiese prestasie nie. 'n Negatiewe korrelasie tussen akademiese prestasie en gewildheid as waarde, word wel aangedui, wat suggereer dat leerlinge dikwels onderpresteer wanneer hulle ouers op gewildheid gesteld is. / Psychology of Education / M. Ed. (Psychology of Education)

The purpose of this study was to investigate the environmental factors that impact on childhood diarrhoea in children under five years old in Akakikality sub city Addis Ababa, Ethiopia. Objectives of the study were to determine the prevalence of diarrhoea and to determine the environmental factors that impact on diarrhoea in children under five years old. A survey was done and a non-experimental approach was used in this descriptive and analytical quantitative study using a cross sectional study design. The instrument was a self-designed questionnaire. The target population for this study was all mothers or caretakers of children under five years found in the described study context – the sample size was 299. In this study 12.7% of the children had diarrhoea during the survey. Proper utilization of toilets, hand washing and safe storage of water in the households using narrow mouthed water containers were significant predictors of diarrhoea in the children. / Health Studies / M.A. (Public Health)

South African institutions of preservation, such as archives, have often focused their collecting efforts on records of national significance and documenting the perspectives of the more dominant communities that represent power and government. This has resulted in the underrepresentation of certain communities in the archival heritage of the nation, such as the South African Portuguese community, whose contemporary history and experiences have not been adequately reflected in the country’s archival collections, including in those of government and other mainstream archival institutions and non-public institutions. Since South Africa has a number of Portuguese community-based organisations - and because the records they have created may be a potential resource for safeguarding the social history of this under-documented group - this study aimed to investigate the management of these records with a view of proposing a best practice model that would assist in their future management and guide their inclusion in any intended archival collection initiatives. Utilising a generic interpretive qualitative research design, the study revealed that the selected study population, namely the Portuguese community-based organisations in Gauteng, create and hold diverse types of records that may show important aspects of the community’s history that are worthy of systematic management and preservation. However, it became evident from the empirical findings that the recordkeeping practices of these organisations were performed inadequately, with records often being misplaced or discarded after their administrative use had expired. The findings also showed that, although these organisations had never thought of establishing an archival programme for themselves or depositing their records in any mainstream archives, they were willing to contribute their records to a planned archival collecting initiative of the community. Based on these findings, recommendations were made with regard to these organisational records in order to improve their management and to facilitate their potential inclusion in an archival collecting plan. The study also suggested an archival collecting framework and a model for these records. The proposed model followed an integrated approach, taking into account the community’s divergent collecting and custody preferences, such as the mainstream institutional acquisition of these records or these being preserved within community structures. / Information Science / D. Litt et Phil. (Information Science)

In this thesis, Margaret Atwood’s The Edible Woman and Michel Faber’s Under the Skin are analysed from the perspective of feminist-vegetarian critical theory. Both texts deal with the idea of feeling like or being meat, but approach this idea from different angles. In The Edible Woman, the connection to feeling like meat is metaphorical and rooted in gender relations, while in Under the Skin, it is literal, related to the idea of being animal. What becomes clear through an analysis of these two texts is that they both deal with the interlocking oppressions of women and animals. In The Edible Woman, protagonist Marian loses her subjectivity and stops eating meat when, as a result of the dynamics of her relationship with her boyfriend (later fiancé), she starts identifying with animals that are hunted or eaten. In Under the Skin, the alien protagonist Isserley, as female, non-human and in her natural form looking like a kind of mammal, represents both women and animals in her objectifying returned gaze on human men. Examining these two texts together highlights the interlocking nature of patriarchy and speciesism, and shows how these oppressions are better understood in relation to each other.

This dissertation constitutes two major sections. In the first major section, a kinetic analysis was established to investigate the electromigration (EM), enhanced intermetallic compound (IMC) growth and void formation for Sn-based Pb-free solder joints to Cu under bump metallization (UBM). The model takes into account the interfacial intermetallic reaction, Cu-Sn interdiffusion, and current stressing. A new approach was developed to derive atomic diffusivities and effective charge numbers based on Simulated Annealing (SA) in conjunction with the kinetic model. The finite difference (FD) kinetic model based on this approach accurately predicted the intermetallic compound growth when compared to empirical observation. The ultimate electromigration failure of the solder joints was caused by extensive void formation at the intermetallic interface. The void formation mechanism was analyzed by modeling the vacancy transport under electromigration. The effects of current density and Cu diffusivity in Sn solder were also investigated with the kinetic model. The second major section describes the integration of Step and Flash Imprint Lithography (S-FIL®) into an industry standard Cu/low-k dual damascene process. The yield on a Back End Of the Line (BEOL) test vehicle that contains standard test structures such as via chains with 120 nm vias was established by electrical tests. S-FIL shows promise as a cost effective solution to patterning sub 45 nm features and is capable of simultaneously patterning two levels of interconnect structures, which provides a low cost BEOL process. The critical processing step in the integration is the reactive ion etching (RIE) process that transfers the multilevel patterns to the inter-level dielectrics (ILD). An in-situ, multistep etch process was developed that gives excellent pattern structures in two industry standard Chemical Vapor Deposited (CVD) low-k dielectrics. The etch process showed excellent pattern fidelity and a wide process window. Electrical testing was conducted on the test vehicle to show that this process renders high yield and consistent via resistance. Discussions of the failure behaviors that are characteristic to the use of S-FIL are provided. / text