Submitted by Luiz Felipe Barbosa (luiz.fbabreu2@ufpe.br) on 2015-03-09T14:20:41Z No. of bitstreams: 2 DISSERTAÇÃO GIOVANE BOAVIAGEM RIBEIRO.pdf: 1180509 bytes, checksum: 60993216b72646656b1bd7f422bbf6f2 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-03-09T14:20:41Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO GIOVANE BOAVIAGEM RIBEIRO.pdf: 1180509 bytes, checksum: 60993216b72646656b1bd7f422bbf6f2 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2014-03-10 / Samsung Enetrônica da Amazônia Ltda / Smartphones estão cada vez mais presentes e conectados. A grande popularização destes aparelhos se deu principalmente pelo sucesso do sistema operacional Android, a modernização dos periféricos presentes no aparelho (câmera, módulo bluetooth, etc), e a adoção de grande parte da população dos planos de redes móveis oferecidos pelas operadoras. Tal popularização pode ser mostrada em números: 86% dos usuários utilizam o smartphone para se comunicar, seja por redes sociais, seja por e-mail ou programas de instant messaging, 73% não saem de casa sem o aparelho e projeções recentes indicam mais de um bilhão de dispositivos com este sistema no mundo. Porém, com a grande quantidade e usabilidade de aplicativos que necessitam de sincronização do seu conteúdo de forma permanente com a rede (com a realização de transmissões periódicas), o consumo de energia do smartphone acaba sendo elevado, devido ao fato da máquina de estados responsável por controlar os recursos de rádio do smartphone não conseguir permanecer no estado IDLE por um tempo suficientemente longo para promover economia de energia, o que acaba contribuindo para a redução da autonomia da bateria, cuja evolução não conseguiu acompanhar a demanda energética dos aparelhos de forma satisfatória. Este trabalho apresenta uma proposta de controle da sincronização global do smartphone baseado nos intervalos das transmissões classificadas como periódicas. Em experimentos com redes e aplicações reais foi constatada economia de energia em valores relevantes (mais de 60% para algumas configurações), mostrando a aplicabilidade e a eficácia da abordagem.

Orientador: Varese Salvador Timóteo / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia / Made available in DSpace on 2018-08-19T10:25:36Z (GMT). No. of bitstreams: 1 Oliveira_TitoRicardoBianchin_M.pdf: 4698545 bytes, checksum: a02de15000b11124637f63ed02fe50ee (MD5) Previous issue date: 2011 / Resumo: O crescimento das redes de terceira geração, aliado a sua alta velocidade para transmissão de dados e banda disponível fazem com que novos terminais lançados no mercado utilizem o comportamento Always On, no qual o dispositivo fica 100% do tempo conectado a rede para transmissão e recepção de dados. Esse comportamento, no entanto, faz com que o consumo de bateria do dispositivo seja maior devido ao uso de aplicativos que recebem informações periodicamente, e principalmente pelo recebimento de pacotes não solicitados provenientes de ataques a rede. Este trabalho tem como objetivo analisar os elementos de rede responsáveis pela transmissão de pacotes de dados, identificando os fatores responsáveis pelo aumento de consumo. Ao final, e proposto um método para melhor aproveitamento dos recursos de radio para transmissão de dados e consequentemente, a diminuição do consumo de energia, utilizando um modelo de previsão / Abstract: The expansion of third generation network and its high speed of data transmission and available bandwidth, made that new designed mobile devices use the "Always On" concept, in which the device is 100% connected in packet switch network, and able for data transmission. This behavior makes the device's energy consumption to be higher due to usage of applications that receives periodically information, and mainly due to the unsolicited packages from hacker attack. This work has as main purpose analyze the network elements responsible for data package transmission, identifying the main factors related to the energy consumption increasing. Finally, it is proposed a method to enhance the radio resources for data transmission and energy consumption decreasing, using a prevision model / Mestrado / Tecnologia e Inovação / Mestre em Tecnologia

The support of mobile workers with mobile IT solutions can create dremendous improvements in mobile business processes of a company. The main charateristic of such a mobile system is the ability to connect via a (mobile) network to a central server, e.g. in order to access customer data. The frequency and the location of the use, data topicality, interaction requirements and many more are central aspects when developing a suitable system architecture. This paper provides a detailed decription of the four main software architectures for mobile systems and their main charateristics. Beyond, typical business requirements are developed, the implications for the system architecture for each of them is shown.

This thesis examines the implementation of an Always On VPN solution for Windows 10 and macOS, focusing on the configuration of a Palo Alto Firewall to enable their GlobalProtect VPN as Always On. This means that the VPN solution is enabled on a device at all times. The primary objective of this thesis is to present a solution, where the GlobalProtect VPN is configured to be Always On for both Windows 10 and macOS devices. Furthermore, the objective is to evaluate the performance impact of the VPN solution on network throughput, packet loss, and jitter. The study compares performance in both AES 128-bit GCM and AES 256-bit GCM encryption modes, as well as performance without the VPN, to determine its potential impact on employee workflow. The employee workflow consists of file uploads of varying sizes across a single stream as well as multiple streams. Here, our study finds that performance is reduced with the VPN solution active and can limit upload speeds by up to 45% depending on the tested scenario. Jitter and packet loss can also increase by more than 50% for jitter and roughly 10% for packet loss. It is worth noting that the practical differences such as time lost through lower network throughput when enabling the VPN solution or added jitter and packet loss is till very low for the majoirty of the scenarios tested in this thesis.  Additionally, the thesis analyzes the functional and performance differences between Windows 10 and macOS when utilizing the VPN solution. Performance wise, the loss is similar between Windows 10 and macOS in certain scenarios but can differ in others. The thesis also highlights a significant limitation of the GlobalProtect VPN, specifically concerning its ability to enforce an Always On VPN experience on macOS devices. Unlike Windows 10, macOS users can still uninstall the VPN agent, posing challenges in ensuring continuous VPN connectivity. The thesis proposes removing administrative rights from macOS users as an optimal solution to prevent agent uninstallation and to maintain an Always On VPN experience with Palo Alto's GlobalProtect VPN.

This thesis presents an investigation of a new three-dimensional urban form where walking distances are less than a half-mile and congestion is minimal. The car-free urban form investigated herein is a city composed of skyscrapers massively interconnected with skybridges at multiple levels. The investigation consists of optimizing space use arrangement, skybridge presence or absence, and elevator number to simultaneously minimize total travel time, skybridge light blockage, and elevator energy usage in the city. These objectives are evaluated using three objective functions, the most significant of which involves a three-dimensional, pedestrian-only, three-step version of the traditional four-step planning model. Optimal and diverse designs are discovered with a genetic algorithm that generates always-feasible designs and uses the maximum fitness function. The space use arrangements and travel times of four extreme designs are analyzed and discussed, and the overall results of the investigation are presented. Conclusions suggest that skybridges are beneficial in reducing travel time and that travel times are shorter in cities wherein space use is mixed vertically as well as horizontally.

The literary utopia is often accused of being an outmoded genre, a graveyard for failed social movements. However, utopian literature is a surprisingly resilient genre, evolving from the static, descriptive anatomies of the Renaissance utopias to the novelized utopian romances of the late nineteenth century and the self-reflexive critical utopias of the 1970s. The literary utopia adapts to the needs of the moment: what form(s) best represent the fears and desires of our current historical period? In this dissertation I perform a close reading of three exemplary texts: John Brunner’s Stand on Zanzibar (1968), Ursula K. Le Guin’s Always Coming Home (1985), and David Mitchell’s Cloud Atlas (2004). While I address topics specific to each text, my main focus is on the texts’ depictions of utopia and their spatialized narrative forms. In Stand on Zanzibar Brunner locates the utopian impulse in three registers—the political/bureaucratic, the technical/scientific, and the human(e)—and explores how their interplay constitutes the utopian space. In Always Coming Home Le Guin renovates the classical literary utopia, problematizing its uncritical advocacy of the “Judaeo-Christian-Rationalist-West” but preserving much of the older utopia’s form. In Cloud Atlas the networked narrative structure reflects and enables the heterogeneous, non-hierarchical, and processual utopian communities depicted in the novel. In these science fictional works the spatialized techniques of juxtaposition, discontinuity, and collage —commonly associated with a loss of historical depth and difference—are used to create utopian spaces founded on contingency and human choice. I contend that science fiction is a historical genre, one that is invested in representing societies as contingent historical totalities. Science fiction’s generic tendencies modify the context that a spatialized narrative form functions in, and in changing the context changes its effects. By utilizing a spatialized narrative form to embody a contingent practice, Brunner, Le Guin, and Mitchell cast the future—and the present—as historical, as something that can be acted upon and changed: they have provided us with strategies for envisioning better futures and, potentially, for mobilizing our visions of the future for positive change in the present.

The thesis deals with the Utopian and dystopian aspects of Ursula K. Le Guin's The Dispossessed and Always Coming Home. To provide a basis for comparison with the endeavours of previous utopists, the first part is devoted to a historical account of literary Utopias, and to an examination of the signposts of the genre. This history is restricted to practical blueprints for the ideal commonwealth and excludes creations of pure fantasy. In tracing Utopian development from Plato to Wells, the influence of historical events and the mainstreams of thought, such as Renaissance humanism, the Reformation, the rising importance of science, the discovery of new lands, the Enlightenment, Locke's Theory of Perfectability, Bentham's utilitarianism, the Industrial Revolution, socialism, the French Revolution, Darwinism, and the conflict between capital and labour is demonstrated. It is also shown how the long-range results of the Russian Revolution and the two world wars shattered all Utopian visions, leading to the emergence of the dystopia, and how the author reversed this negative trend in the second part of the twentieth century. In a study of forms of Utopian presentation, the claim is made that The Dispossessed features the first Utopia that qualifies as a novel: not only does the author break with the genre's tradition of subordinating the characters to the proposal, she also creates the conflict necessary for novelistic structure by juxtaposing her positive societies with negative ones. In part two, the Utopias and dystopias of both books are examined, and their features compared to previous endeavours in the genre. The observation is made that although the author favours anarchism as a political theory, she is more deeply committed to the Chinese philosophy of Taoism, seeing in its ideals the only way to a harmonious and just existence for all. In order to prove her point, Le Guin renders her Utopias less than perfect, placing one society into an inhospitable environment and showing the other as suffering from genetic damage; this suggests that the ideal life does not rest in societal organization or beneficent surroundings, but in the minds of the inhabitants: this frame of mind—if not inherent in a culture—can be achieved by living in accordance with the tao. Lastly, an effort is made to determine the anthropological models upon which Utopian proposals are constructed. The theory is put forth that all non-governed, egalitarian Utopias represent a return to the societal arrangements of early man, when his communities were still small and decentralized, and before occupational specialization began to set in; that all democratic forms of government are taken from the Greek examples, that More's Utopia might well have been modelled on the Athenian clans of the pre-Cleisthenes era, and that the Kesh society of Always Coming Home is based exclusively on the kinship systems of the Pueblo Indians of the American Southwest. / Arts, Faculty of / English, Department of / Graduate

This thesis explores the utilisation of satire within the television series It's Always Sunny in Philadelphia. Employing Stuart Hall's encoding/decoding model as a theoretical framework, this study delves into the complexities of how satire is constructed, received, and interpreted by viewers. Hall’s model will be paired with a genre studies and audience receptions studies. The research employs two methods; a text analysis of a specific episode (“A Woman’s Right to Chop”); and interviews. The issues displayed in the episode are: gender roles, women’s rights, abortion and adoption. These issues are portrayed in a satirical manner by the use of humour, exaggeration, irony, critique, stereotypes and symbolism. The majority of the interviewees were found to understand and engage with the satire. Parts of the interviewees understood some of the underlying meanings. Few of the interviewees did not understand or misunderstood the material completely. Apart from satire, the additional interpretations stemmed from viewers fixating on minor details, misconstruing the portrayed messages, taking a literal approach, and harbouring dismissive sentiments towards the episode's content.

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