abstract: A multitude of individuals across the globe suffer from hearing loss and that number continues to grow. Cochlear implants, while having limitations, provide electrical input for users enabling them to "hear" and more fully interact socially with their environment. There has been a clinical shift to the bilateral placement of implants in both ears and to bimodal placement of a hearing aid in the contralateral ear if residual hearing is present. However, there is potentially more to subsequent speech perception for bilateral and bimodal cochlear implant users than the electric and acoustic input being received via these modalities. For normal listeners vision plays a role and Rosenblum (2005) points out it is a key feature of an integrated perceptual process. Logically, cochlear implant users should also benefit from integrated visual input. The question is how exactly does vision provide benefit to bilateral and bimodal users. Eight (8) bilateral and 5 bimodal participants received randomized experimental phrases previously generated by Liss et al. (1998) in auditory and audiovisual conditions. The participants recorded their perception of the input. Data were consequently analyzed for percent words correct, consonant errors, and lexical boundary error types. Overall, vision was found to improve speech perception for bilateral and bimodal cochlear implant participants. Each group experienced a significant increase in percent words correct when visual input was added. With vision bilateral participants reduced consonant place errors and demonstrated increased use of syllabic stress cues used in lexical segmentation. Therefore, results suggest vision might provide perceptual benefits for bilateral cochlear implant users by granting access to place information and by augmenting cues for syllabic stress in the absence of acoustic input. On the other hand vision did not provide the bimodal participants significantly increased access to place and stress cues. Therefore the exact mechanism by which bimodal implant users improved speech perception with the addition of vision is unknown. These results point to the complexities of audiovisual integration during speech perception and the need for continued research regarding the benefit vision provides to bilateral and bimodal cochlear implant users. / Dissertation/Thesis / Masters Thesis Speech and Hearing Science 2015

abstract: The present study describes audiovisual sentence recognition in normal hearing listeners, bimodal cochlear implant (CI) listeners and bilateral CI listeners. This study explores a new set of sentences (the AzAV sentences) that were created to have equal auditory intelligibility and equal gain from visual information. The aims of Experiment I were to (i) compare the lip reading difficulty of the AzAV sentences to that of other sentence materials, (ii) compare the speech-reading ability of CI listeners to that of normal-hearing listeners and (iii) assess the gain in speech understanding when listeners have both auditory and visual information from easy-to-lip-read and difficult-to-lip read sentences. In addition, the sentence lists were subjected to a multi-level text analysis to determine the factors that make sentences easy or difficult to speech read. The results of Experiment I showed that (i) the AzAV sentences were relatively difficult to lip read, (ii) that CI listeners and normal-hearing listeners did not differ in lip reading ability and (iii) that sentences with low lip-reading intelligibility (10-15 % correct) provide about a 30 percentage point improvement in speech understanding when added to the acoustic stimulus, while sentences with high lip-reading intelligibility (30-60 % correct) provide about a 50 percentage point improvement in the same comparison. The multi-level text analyses showed that the familiarity of phrases in the sentences was the primary driving factor that affects the lip reading difficulty. The aim of Experiment II was to investigate the value, when visual information is present, of bimodal hearing and bilateral cochlear implants. The results of Experiment II showed that when visual information is present, low-frequency acoustic hearing can be of value to speech understanding for patients fit with a single CI. However, when visual information was available no gain was seen from the provision of a second CI, i.e., bilateral CIs. As was the case in Experiment I, visual information provided about a 30 percentage point improvement in speech understanding. / Dissertation/Thesis / Doctoral Dissertation Speech and Hearing Science 2015

O objetivo proposto por este estudo é investigar a contribuição da Operação Pan-Americana (OPA), lançada pelo Brasil, em 1958, durante o Governo JK, para o estreitamento das relações entre o Brasil e a Argentina, cujo ápice foram os “Acordos de Uruguaiana”, firmados em 1961. A crescente parceria estendeu-se até a desestabilização provocada pelo golpe militar, que destituiu o Presidente argentino Arturo Frondizi, em 1962. Este trabalho procura demonstrar que, durante o período de 1958 a 1962, atingiu-se um alto nível de cooperação bilateral, como resultado de uma ampla mobilização por parte tanto do corpo diplomático, quanto das assessorias diretamente ligadas ao Poder Executivo dos governos desses dois países.As razões que motivaram uma convergência nas ações dos governos do Brasil e da Argentina foram: no aspecto econômico, a necessidade de ampliação do mercado regional, visando a uma maior inserção internacional dessas economias; no aspecto político, o esforço para a manutenção da autonomia frente aos Estados Unidos, potência mundial com hegemonia na região. Tal posicionamento foi influenciado, principalmente, pela tentativa de ingerência norte-americana em determinados países, como foi o caso da Guatemala, em 1954. Portanto, a cooperação internacional dos países latino-americanos (a partir do lançamento da OPA), ampliou o enfoque, que antes era exclusivamente bilateral (com os Estados Unidos), para o âmbito regional, por meio da qual se buscou fortalecer as economias da região. A iniciativa brasileira, de caráter hemisférico, caracterizada pela OPA, acabou contribuindo para que houvesse uma aproximação entre os dois países. Nesses termos, os entendimentos de Uruguaiana, são, aqui, analisados como o resultado de um aprofundamento do projeto de JK; isso porque, apesar de ter havido o fortalecimento dos laços, especialmente, dos dois maiores países do Sul do Continente, mediante os Acordos de Uruguaiana, a OPA abriu também uma nova perspectiva para os demaispaíses da região, que resultou na criação da Associação Latino-Americana de Livre Comércio (ALALC).

Submitted by Paula Quirino (paula.quirino@ufpe.br) on 2015-03-13T15:48:09Z No. of bitstreams: 1 DISSERTAÇÃO JoyceHelenaFerreiradaSilva-final.pdf: 1712168 bytes, checksum: 12e388c2625762046bc35ffdc98e87d7 (MD5) / Made available in DSpace on 2015-03-13T15:48:09Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO JoyceHelenaFerreiradaSilva-final.pdf: 1712168 bytes, checksum: 12e388c2625762046bc35ffdc98e87d7 (MD5) Previous issue date: 2013 / O objetivo deste estudo é delinear alguns aspectos da relação bilateral sino-brasileira, no período 2000-2012, a fim de verificar, principalmente, a partir do padrão de comércio e das relações políticas, de que forma a aproximação entre os dois países tem impactado no Brasil. O esforço consiste numa tentativa de mensurar se esta aproximação, tanto em termos econômicos quanto políticos, tem permitido ao Brasil avanços consistentes no sentido de um projeto político de desenvolvimento ou se refletem apenas ganhos conjunturais, enlaçando o país latino americano numa nova condição de dependência do mercado chinês para seus produtos primários, trazendo à tona a questão da especialização regressiva da pauta de exportação brasileira, e a possibilidade de uma desestruturação de sua indústria pela enxurrada de produtos chineses de baixíssimo custo de produção e, portanto, mais competitivos.

Foreign investment is mainly protected through national laws. However the wide-spreading network of bilateral investment treaties aims to ensure a certain standard of protection. These treaties demonstrate far-reaching implications at both treaty level and international level. The implications raise an important question as to whether bilateral investment treaties are coherent or not. Coherence can be viewed as an attempt to prettify the law and minimise the effect of politics which may leave the law incoherent. It is obvious that bilateral investment treaties need to be coherent for a number of reasons. Firstly, incoherent treaties may create problems in relation to the development policy of member countries. Secondly, coherence reassures that negotiators of such treaties would not encounter possible contradictions and inconsistencies amongst the countries’ agreement network as well as between the treaties and domestic laws. Thirdly, coherence is critical to treaty interpretation as it is necessary to avoid further complications which may arise from contradictory awards. The aim of this thesis is mainly to elucidate the meaning of coherence and use it to provide an understanding as to how coherent these treaties are. The coherence of bilateral investment treaties will be evaluated in a number of aspects: coherence between bilateral investment treaties and the fundamental principles of international investment law; coherence between bilateral investment treaties and their objectives of investment promotion and investment liberalisation; coherence within the bilateral investment treaties network; coherence between bilateral investment treaties and customary international law on foreign investment; coherence between bilateral investment treaties and free trade agreements; coherence between bilateral investment treaties’ obligations and non-investment obligations of states.

The recent investment policy shift, by the South African government, including, termination of bilateral investment treaties with some developed countries, is illustrative of the continued discontent by most developing countries with the status quo in the realm of international investments agreements (IIAs) regime. Balancing governments' sovereign right to implement domestic policies, in order to achieve socio-economic goals, for overall sustainable development, and the corresponding duty to protect foreign investments within the host state seems perpetually elusive, within the current bilateral investment treaty (BIT) regime. The parallel rising of free trade agreements (FTAs) incorporating investment chapters to BITs and the withdrawal from international investment arbitration by some countries, is symptomatic of continued disgruntlement with the current investment regime. South Africa is amongst the front runners of this discontentment and has voiced its concerns with the system, by cancelling some of its BITs and substituting same with adopting a new domestic investment regime instead, the investment Act of 2015. This study analyses the government's policy shift, with a view to find the extent to which the current BIT regime constrained the government's policy space towards economic transformation. This is achieved by analysing the substance and objective of the policy reform as against the international standards. Consequently, after probing the global investment regime and more in particularly the country's economic and political architecture, the study found that although South Africa's investment policy shift was labelled 'drastic and regressive' by critics, the latter is rational when subjected to substantive approach to the rule of law. Author however, concludes that it is the implementation thereof that is disproportional, as the same objectives underpinning the policy reform can be achieved through a less contentious approach. Finally author suggests a renegotiation of a model BIT as a less onerous and proportionate tool, to achieve the balance sought, and recommends policy options for enhancing international investment regime to address the challenges identified. / tm2017 / Centre for Human Rights / LLM / Unrestricted

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MAIR / Department of Development Studies / Development Aid has often has been used as a tool and written about where in by developed states dominated African countries during the colonial rule to maximize their countries economy by means of exporting raw materials from Africa to Europe meanwhile the majority of Africans living in poverty. However, the role of USAID towards South Africa’s development has attracted little study so far. Into today’s politics country states interact in a political arena to formulate bilateral relations. Since the adoption of independent in 1994 South Africa is still facing challenges of socio economic development such as lack of health care facilities, poor education, and high rate of unemployment, lack of infrastructures and lack of good governance. This work investigates the role of the USAID towards the development of South African government. Issue to be examined is the bilateral relations of US-SA for SA socio economic development. / NRF

The frequent occurrences of natural and technological disasters have incurred grave loss of life and damage to property. For mitigating the miserable aftermaths, multi-robot teleoperation systems have been developed and deployed to cooperate with human rescuers in post-earthquake scenarios, and to sample, monitor and clean pollutants in marine environments. With a bidirectional communication channel, human users can deliver commands/requests to guide the motions of the remote robots, and can receive visual/audio feedback to supervise the status of the remote environment, throughout multi-robot teleoperation. Furthermore, the remote robots can send force feedback to human operators to improve their situational awareness and task performance. This way, a closed-loop multi-robot teleoperation system becomes bilateral in which coordinated robots physically interact and exchange energy with human users, and hence needs to be rendered passive for safe human-robot interaction. Beyond guaranteeing closed-loop passivity, the control of a bilateral multi-robot teleoperation system faces two challenging problems: preserving the communication connectivity of the remote robots; and dispatching the teleoperation authority to multiple human users. Because wireless transmission of radio/acoustic signals between the remote robots is constrained by their distances, bilateral multi-robot teleoperation control must coordinate the motions of the remote robots appropriately so as to maintain their communication network connected. Further, multiple human users can send possibly conflicting teleoperation commands to the remote robots, a distributed authority dispatch algorithm is thus needed for the remote robot network to recognize and follow the most urgent user commands at runtime. This thesis develops an energy shaping strategy to preserve the connectivity of the remote robots, and to dispatch control authority over the remote robots to human users, during bilateral multi-robot teleoperation. Chapter 1 introduces the application background of multi-robot teleoperation as well as the state-of-the-art development in related research areas. In Chapter 2, a dynamic interconnection and damping strategy is proposed to reduce and constrain the position error between the local and remote robots to any prescribed bound during bilateral teleoperation. Chapter 3 derives a gradient plus damping control from a bounded potential function and then unifies it into an indirect coupling framework to preserve all communication links of an autonomous multi-robot system with time-varying delays and bounded actuation. On these bases, Chapter 4 develops a dynamic feedforward-feedback passivation strategy to preserve all communication links and thus the connectivity of the tree network of the remote robots while rendering the bilateral multi-robot teleoperation close loop passive. Specifically, by blending the sliding variable in Chapter 2 with the bounded potential function in Chapter 3, the dynamic passivation strategy decomposes the dynamics of the remote robots into a power-preserving interconnection of two subsystems, and regulates the energy behaviour of each subsystem to preserve the tree communication connectivity of the remote robots. To handle time-varying communication delays, the strategy further transforms the communication channels between the local and remote robots into a dynamic controller for passivating bilateral teleoperation. Superior to existing controls, the strategy using a bounded potential function can circumvent numerical instability, reduce noise sensitivity and facilitate future extensions to accommodate robot actuator saturation. On the other side, Chapter 5 designs a distributed and exponentially convergent winners-take-all authority dispatch algorithm that activates the teleoperation of only human users with the most urgent requests in real time. After formulating the problem as a constrained quadratic program, we employ an exact penalty function method to construct a distributed primal-dual dynamical system that can solve the problem at an exponential rate. Because the equilibrium of the system changes with user requests, we then interconnect the dynamical system with physical robot dynamics in a power-preserving way, and passivate closed-loop multi-robot teleoperation using multiple storage functions from a switched system perspective. Finally, Chapter 6 provides some conclusive remarks and two problems regarding connectivity preservation and authority dispatch for future study. / Graduate

Massive bilateral adrenal hemorrhage occurring in the postoperative period is an unusual but potentially life-threatening complication of any abdominal operation. The diagnosis is often difficult due to the nonspecific nature of the clinical presentation, which is easily attributable to other more common postoperative conditions. We report a case of bilateral adrenal hemorrhage resulting in acute primary adrenal insufficiency following an otherwise-uncomplicated laparoscopic cholecystectomy, which has not previously been described. An awareness of the possibility of this uncommon condition complicating laparoscopic cholecystectomy may lead to a higher index of suspicion, which is important in timely diagnosis and prompt treatment.