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Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2018-08-16T15:46:10Z No. of bitstreams: 1 Moreno Cruz Osório_.pdf: 1552076 bytes, checksum: f89242265c71e36493d75b2b5ed328c2 (MD5) / Made available in DSpace on 2018-08-16T15:46:10Z (GMT). No. of bitstreams: 1 Moreno Cruz Osório_.pdf: 1552076 bytes, checksum: f89242265c71e36493d75b2b5ed328c2 (MD5) Previous issue date: 2018-04-25 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico / Esta tese dedica-se a elaborar o ciberacontecimento breaking news, uma formulação teórico-metodológica para compreender o breaking news no jornalismo contemporâneo realizado em redes digitais. À expressão breaking news é atribuída uma intensificação da relação entre as categorias substantivas dos valores-notícia oriunda dos níveis de extraordinariedade dos acontecimentos e as rotinas jornalísticas como procedimento chave para a realização do trabalho jornalístico. Considerando a capacidade de impor o determinismo jornalístico aos fenômenos como uma das características que mais distingue o fazer profissional, parte do pressuposto que, atualmente, tal habilidade possui contornos intrincados. Pois sua prática é suscetível a influências de um ecossistema midiático complexo, em rede, descentralizado, acelerado, fluído, e marcado pela multiplicação do número de atores capazes de construir a realidade. Partindo do ciberacontecimento, o conceito proposto de ciberacontecimento breaking news constrói teoricamente esta intensificação, oferecendo possibilidades de abordá-la empiricamente. Esta construção é realizada por meio de dois movimentos. O primeiro desenvolve a proposta teórico-metodológica. Busca interfaces com a Teoria Ator-Rede (TAR), com o conceito de rizoma, de Deleuze e Guattari, com o método da cartografia e a com prática da curadoria de conteúdo. Objetiva arquitetar a anatomia e a dinâmica do processo evenemencial de um acontecimento extraordinário ao se desenvolver em rede. O segundo movimento busca, na teoria do jornalismo recente, subsídios para sustentar o ciberacontecimento breaking news. Para isso, são analisados 75 artigos publicados em um período de dez anos (2007-2016) nos periódicos Journalism, Journalism Practice e Digital Journalism. Esta análise traça uma evolução da expressão “breaking news” na contemporaneidade observando as discussões realizadas em sua órbita. Elas nutrem e contextualizam as características do ciberacontecimento breaking news desenvolvidas no primeiro movimento. A abordagem do breaking news desenvolvida nesta tese sugere um processo de dispersão e de reconcentração das práticas jornalísticas, em um movimento cuja tendência é a ampliação das fronteiras do jornalismo. / This doctoral thesis develops the cyberevent breaking news, a theoretical-methodological proposal that aims to understand the breaking news in contemporary Journalism performed in digital networks. The expression breaking news here is understood as an intensification of the relationship between the substantive categories of the news values originated from the events’ levels of extraordinariness and the journalistic routine as a key procedure for performing the journalistic work. Knowing that the capacity to impose journalistic determinism to phenomena is one of the characteristics that distinguishes professional journalistic work, it is based on the assumption that, nowadays, this ability has intricate boundaries, since it is known that its practice is open to influences of a complex, networked, decentralized, accelerated, fluid media ecosystem that is characterized by the multiplication of the number of actors able to build the social reality. Taking the concept of cyberevent as starting point, the cyberevent breaking news builds the mentioned intensification theoretically, offering possibilities to approach it empirically. This construction is splited in two movements. The first one develops the theoretical-methodological proposal itself. It does this by creating interfaces with the Actor-Network Theory (ANT), with the Deleuze and Guattari’s concept of rhizome, with the cartography method and with content curation practice. The goal is to architect the anatomy and dynamics of the evenemential process of an extraordinary event when it happens in a network. The second one quests subsidies to sustain the cyberevent breaking news in the recent journalism theory. For this, 75 articles published over a period of ten years (2007-2016) in the journals Journalism, Journalism Practice and Digital Journalism are analyzed. This analysis traces an evolution of the expression "breaking news" in the contemporaneity observing the discussions that appears in its orbit. Such discussions feed and contextualize the characteristics of the cyberevent breaking news developed in the first effort. The understanding of the breaking news developed in this thesis suggests a process of dispersion and reconcentration of journalistic practices, in a movement that indicates the expansion of the journalism boundaries.

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Modeling of wave energy transformation and breaking on fringing reefs is inherently difficult due to the unique topography of reefs. Prior methods of determining dissipation are based on empirical data from gently sloping beaches and offer only bulk energy dissipation estimates over the entire spectrum. Methods for deducing a frequency-dependent dissipation have been limited to hypothesized linkages between dissipation and wave shape in the surf zone, and have used bulk dissipation models as a constraint on the overall dissipation for mild sloping beaches. However, there is no clear indication that the constraint on the overall level of dissipation is suitable for the entire reef structure. Using these constraints the frequency-dependent dissipation rate can be deduced from laboratory data of wave transformation over reefs, taken at the Coastal and Hydraulics Laboratory. The frequency-dependent dissipation rate can then be integrated over the spectrum to derive an empirically-based counterpart to energy flux dissipation. Comparing the bulk energy dissipation estimates for the reef system to the frequency based method allows for the modification of wave breaking parameters in the frequency based estimation. Since this method is based on the Fourier transform of the time series data, it allows the dissipation to be found as a function of the frequency. This analysis shows that there is a correlation between the amount of energy in the low frequencies of the wave spectrum and certain characteristics of the frequency-dependent dissipation coefficient.

The simulation of breaking wave has a computationally intensive application. In order to reduce the computation, this thesis presents a slice-based water simulation method for ocean breaking waves on natural simulation by generating the 2D simulations and then integrating these 2D simulation results into a 3D shape. We first simulate a 2D wave by a 2D Navier-Stokes solver to obtain the varying of ocean. Then, we combine VOF (Volume of fluid) with a new reconstruct free surface method that is a fast 2D simulation. We use linear interpolation with noise function to construct a complete 3D ocean simulation from these 2D simulations. By doing these, one can reduce the computation time and achieve better efficiency.

Thesis (M.Eng.)--Memorial University of Newfoundland, 2001. / Bibliography: leaves 78-84.

A novel holographic model of chiral symmetry breaking has been proposed by Kuperstein and Sonnenschein by embedding non-supersymmetric probe D7 and anti-D7 branes in the Klebanov-Witten background. We study the dynamics of the probe flavours in this model in the presence of finite temperature and a constant electromagnetic field. In keeping with the weakly coupled field theory intuition, we find the magnetic field promotes spontaneous breaking of chiral symmetry whereas the electric field restores it. The former effect is universally known as the ``magnetic catalysis" in chiral symmetry breaking. In the presence of an electric field such a condensation is inhibited and a current flows. Thus we are faced with a steady-state situation rather than a system in equilibrium. We conjecture a definition of thermodynamic free energy for this steady-state phase and using this proposal we study the detailed phase structure when both electric and magnetic fields are present in two representative configurations: mutually perpendicular and parallel. / text

Breaking news implies that something urgent, important and newsworthy happened, assuming that viewers will be more curious about this event. As the mass media have continued to develop, the form of breaking news also keeps on changing. Today, the internet plays a primary role as a platform of breaking news. With online news services providing a plethora of real-time breaking news to audiences, there is a concern that online breaking news has little news value. Some scholars warned that the increase in the number of breaking news would finally impoverish the quality of journalism. Thus, this study tried to ascertain the credibility of online breaking news. This study conducted a 2 (news with/without breaking label) ⅹ 2 (high and low news value) factorial-designed experiment. The result of the experiment suggested that neither breaking news label nor newsworthiness would not increase or decrease the credibility rating. It would be possible to assume that there was no effect of such two components because audiences have already grown accustomed to the prevalence of the label breaking news and continual update of the headline of online news. Journalists might arbitrarily label specific news as breaking news, but they would keep in mind that calling something “breaking news” neither helps nor hurts. / text

In this thesis, we report a novel symmetry breaking system in single-beam optical trap. The breaking of symmetry is observed in Brownian dynamics of a linked pair of beads with substantially differing radii (500nm and 100nm). Such composite beads were originally conceived as a manipulation means to study of Brownian interactions between mesoscopic biological agents of the order of 100 – 200 nm (viruses or bacteria) with cell surfaces. During the initial testing of the composite bead system, we discovered that the system displayed thermally activated transitions and energetics of symmetry breaking. This thesis, while making a brief overview of the biological relevance of the composite bead system, focuses primarily on the analysis and experimentation that reveals the complex dynamics observed in the system. First, we theoretically analyze the origin of the observed symmetry breaking using electromagnetic theory under both Gaussian beam approximation and full Debye-type integral representation. The theory predicts that attachment of a small particle to a trapped microsphere results in creation of a bistable rotational potential with thermally activated transitions. The theoretical results are then verified using optical trapping experiments. We first quantify the top-down symmetry breaking based on measurement of the kinetic transition rates. The rotational potential is then explored using an experiment employing a novel algorithm to track rotational state of the composite bead. The results of the theory and experiments are compared with results of a Brownian dynamics simulation based on Smart Monte Carlo algorithm.

According to the Bruntland Commission, sustainable development requires consumers in industrialized nations to reduce significantly their consumption of resources. This research brings a new perspective to the reduction of discretionary consumption, using both theoretical and empirical approaches. Demarketing programs have often been unable to achieve sustained reductions in consumption. It is argued here that they have incorrectly treated demand reduction as a variation on the usual marketing problem of building demand, when it is (1) more complex than typical marketing problems, and (2) essentially similar to clinical habit change problems. The dissertation reviews the literature on habits and automated processes, introduces the concept of “habit-like” behavior, and argues that reducing discretionary consumption can often be framed as a habit-change problem. The Prochaska and DiClemente (1984) Revolving Door Model of Behavior Change (RDM) describes how people change habitual behaviors in clinical situations. Study 1, an energy conservation (cold water laundry washing) survey (n=340), using a decisional balance framework, indicated that the RDM generalizes to demarketing situations and that it is consumers’ perceptions of the importance of disadvantages, not advantages, that influence consumption reductions. The research develops new theory to explain habit-like behavior changes. Based on previous theory and findings on automated processes, it is proposed that changing habit-like behavior proceeds in three steps: de-automation, volitional behavior change, and consolidation. Study 2 was a laboratory experiment (n= 117) in which two demarketing approaches (the traditional approach and the habit-change approach) competed in two situations (when the consumption behavior targeted for change was under volitional control, and when it was habit-like). Contrary to expectations, a persuasive message supplemented by limited practice of the new behavior was more effective when the old behavior was volitional than when it was habit-like, suggesting that the disadvantages of changing are more evident to people whose behavior is habit-like. There are two important practical implications: that (1) segmentation based on the RDM stages of change may be more powerful than other approaches; and (2) it is more important to address disadvantages of reducing consumption than to emphasize advantages.