954 resultados para String-pulling


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This study has as objective to investigate the identity constructions of Mossoró, at the statements of the string literature. Having as thread the episode of resistance of the city against the group of Lampião at June the thirteenth of nineteen twenty seven, our study built itself at the statements present in nine strings, produced between the space-time of 1927 and 2007, year that Mossoró celebrated eighty years of the episode. Aware that the theme extrapolated the limits of the means of communication of the time and it became part of the everyday of the people from Mossoró, producing at the collective memory the image of a resistance city at the street’s names, at companies’ names, at radios’ names with the “FM Resistance”, at the discourses of the politicians, at the city hall which name is “Palace of the Resistance”, the central question that guides our investigation congregates the discussion around the dialogical relations done at the statements about the theme in vogue. This bias, the research elected as categories of analysis the concept of social voices and chronology, considering that the different identities are produced according to placements made by the subjects, as well as, by the context of production. Admitted at the area of Applied Linguistics (AL) and its line language and pratic of social the research articulates the theorizations provided from the area of Cultural Studies (especially regarding identity) with the theoretical framework of the bakhitinian Circle (regarding the social-historical conception of language and in its dialogical character). The results indicate that even existing an axiological movement around the representations of Mossoró and of the episode of 1927, the statements of the strings converge to a hegemonic discourse, corroborating with the identity profile of resistance transported over eighty decades

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Einstein’s equations with negative cosmological constant possess the so-called anti de Sitter space, AdSd+1, as one of its solutions. We will later refer to this space as to the "bulk". The holographic principle states that quantum gravity in the AdSd+1 space can be encoded by a d−dimensional quantum field theory on the boundary of AdSd+1 space, invariant under conformal transformations, a CFTd. In the most famous example, the precise statement is the duality of the type IIB string theory in the space AdS5 × S 5 and the 4−dimensional N = 4 supersymmetric Yang-Mills theory. Another example is provided by a relation between Einstein’s equations in the bulk and hydrodynamic equations describing the effective theory on the boundary, the so-called fluid/gravity correspondence. An extension of the "AdS/CFT duality"for the CFT’s with boundary was proposed by Takayanagi, which was dubbed the AdS/BCFT correspondence. The boundary of a CFT extends to the bulk and restricts a region of the AdSd+1. Neumann conditions imposed on the extension of the boundary yield a dynamic equation that determines the shape of the extension. From the perspective of fluid/gravity correspondence, the shape of the Neumann boundary, and the geometry of the bulk is sourced by the energy-momentum tensor Tµν of a fluid residing on this boundary. Clarifying the relation of the Takayanagi’s proposal to the fluid/gravity correspondence, we will study the consistence of the AdS/BCFT with finite temperature CFT’s, or equivalently black hole geometries in the bulk.

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Technical and interpretative aspects of the String Quartet No. 2 Guerra-Peixe will approach this work of a composer who is considered one of the greatest exponents of Brazilian music of the twentieth century, who developed several strands in his career as a musicologist, performer, composer, arranger radio and cinema, among others. In this work, we will see in the work in question their compositional styles, pointing sources that he has been drinking and offering elements that will subsidize technical and interpretive choices for future interpreters. After the historical context and esthetics, we will make some brief remarks about the terms performance and interpretation, to support the objective of the work, which will be the interpretation of the work. For that purpose, a comparative analysis was performed between recording of important Brazilian quartets, interviews with relevant players on the national scene and trials in rehearsals and recitals, always making a Quartet bridge with other works by the composer. Concomitantly, it was held analysis of handwritten edits by the composer, culminating with its own revised edition.

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Technical and interpretative aspects of the String Quartet No. 2 Guerra-Peixe will approach this work of a composer who is considered one of the greatest exponents of Brazilian music of the twentieth century, who developed several strands in his career as a musicologist, performer, composer, arranger radio and cinema, among others. In this work, we will see in the work in question their compositional styles, pointing sources that he has been drinking and offering elements that will subsidize technical and interpretive choices for future interpreters. After the historical context and esthetics, we will make some brief remarks about the terms performance and interpretation, to support the objective of the work, which will be the interpretation of the work. For that purpose, a comparative analysis was performed between recording of important Brazilian quartets, interviews with relevant players on the national scene and trials in rehearsals and recitals, always making a Quartet bridge with other works by the composer. Concomitantly, it was held analysis of handwritten edits by the composer, culminating with its own revised edition.

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Under the framework of the ANDRILL Southern McMurdo Sound (SMS) Project successful downhole experiments were conducted in the 1138.54 metre (m)-deep AND-2A borehole. Wireline logs successfully recorded were: magnetic susceptibility, spectral gamma ray, sonic velocity, borehole televiewer, neutron porosity, density, calliper, geochemistry, temperature and dipmeter. A resistivity tool and its backup both failed to operate, thus resistivity data were not collected. Due to hole conditions, logs were collected in several passes from the total depth at ~1138 metres below sea floor (mbsf) to ~230 mbsf, except for some intervals that were either inaccessible due to bridging or were shielded by the drill string. Furthermore, a Vertical Seismic Profile (VSP) was created from ~1000 mbsf up to the sea floor. The first hydraulic fracturing stress measurements in Antarctica were conducted in the interval 1000-1138 mbsf. This extensive data set will allow the SMS Science Team to reach some of the ambitious objectives of the SMS Project. Valuable contributions can be expected for the following topics: cyclicity and climate change, heat flux and fluid flow, seismic stratigraphy in the Victoria Land Basin, and structure and state of the modern crustal stress field.

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Cette thèse de doctorat en composition comprend deux projets de nature différente et complémentaire : (1) un projet de recherche théorique sur la communication des caractères musicaux; (2) un projet artistique s'articulant autour de la composition de trois pièces : L'homme à deux têtes - opéra de chambre, Un instant dans l'esprit de Lovecraft - pour clarinette solo, orchestre à cordes et percussions, et Balade ornithologique - pour orchestre à vents. La conception de la musique comme un moyen de communication est à l'origine de cette recherche théorique qui est motivée par un désir de compréhension des stratégies d'expressions des émotions en musique, à partir du point de vue du compositeur. Cette thèse aborde les modèles de communication, le concept de personnage virtuel et la théorie de la contagion des humeurs. Par la suite, nous détaillerons les indices acoustiques menant à la perception des caractères musicaux. Toutes ces notions sont illustrées et explorées par la composition de miniature ayant un caractère bien ciblé. Finalement, nous proposons un système d'analyse musical des caractères et des émotions qui est appliqué à l'analyse de sections des pièces composées au cours de ce projet de doctorat. Ce dernier chapitre met en lumière les stratégies utilisées pour créer un discours dramatique tout en exposant l'évocation de différents caractères musicaux.

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In recent years, most low and middle-income countries, have adopted different approaches to universal health coverage (UHC), to ensure equity and financial risk protection in accessing essential healthcare services. UHC-related policies and delivery strategies are largely based on existing healthcare systems, a result of gradual development (based on local factors and priorities). Most countries have emphasized on health financing, and human resources for health (HRH) reform policies, based on good practices of several healthcare plans to deliver UHC for their population.

Health financing and labor market frameworks were used, to understand health financing, HRH dynamics, and to analyze key health policies implemented over the past decade in Kenya’s effort to achieve UHC. Through the understanding, policy options are proposed to Kenya; analyzing, and generating lessons from health financing, and HRH reforms experiences in China. Data was collected using mixed methods approach, utilizing both quantitative (documents and literature review), and qualitative (in-depth interviews) data collection techniques.

The problems in Kenya are substantial: high levels of out-of-pocket health expenditure, slow progress in expanding health insurance among informal sector workers, inefficiencies in pulling of health are revenues, inadequate deployed HRH, maldistribution of HRH, and inadequate quality measures in training health worker. The government has identified the critical role of strengthening primary health care and the National Hospital Insurance Fund (NHIF) in Kenya’s move towards UHC. Strengthening primary health care requires; re-defining the role of hospitals, and health insurance schemes, and training, deploying and retaining primary care professionals according to the health needs of the population; concepts not emphasized in Kenya’s healthcare reforms or programs design. Kenya’s top leadership commitment is urgently needed for tougher reforms implementation, and important lessons from China’s extensive health reforms in the past decade are beneficial. Key lessons from China include health insurance expansion through rigorous research, monitoring, and evaluation, substantially increasing government health expenditure, innovative primary healthcare strengthening, designing, and implementing health policy reforms that are responsive to the population, and regional approaches to strengthening HRH.

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In this thesis we study aspects of (0,2) superconformal field theories (SCFTs), which are suitable for compactification of the heterotic string. In the first part, we study a class of (2,2) SCFTs obtained by fibering a Landau-Ginzburg (LG) orbifold CFT over a compact K\"ahler base manifold. While such models are naturally obtained as phases in a gauged linear sigma model (GLSM), our construction is independent of such an embedding. We discuss the general properties of such theories and present a technique to study the massless spectrum of the associated heterotic compactification. We test the validity of our method by applying it to hybrid phases of GLSMs and comparing spectra among the phases. In the second part, we turn to the study of the role of accidental symmetries in two-dimensional (0,2) SCFTs obtained by RG flow from (0,2) LG theories. These accidental symmetries are ubiquitous, and, unlike in the case of (2,2) theories, their identification is key to correctly identifying the IR fixed point and its properties. We develop a number of tools that help to identify such accidental symmetries in the context of (0,2) LG models and provide a conjecture for a toric structure of the SCFT moduli space in a large class of models. In the final part, we study the stability of heterotic compactifications described by (0,2) GLSMs with respect to worldsheet instanton corrections to the space-time superpotential following the work of Beasley and Witten. We show that generic models elude the vanishing theorem proved there, and may not determine supersymmetric heterotic vacua. We then construct a subclass of GLSMs for which a vanishing theorem holds.

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Bacterial tubulin homolog FtsZ assembles straight protofilaments (pfs) that form the scaffold of the cytokinetic Z ring. These pfs can adopt a curved conformation forming a miniring or spiral tube 24 nm in diameter. Tubulin pfs also have a curved conformation, forming 42 nm tubulin rings. We have previously provided evidence that FtsZ generates a constriction force by switching from straight pfs to the curved conformation, generating a bending force on the membrane. In the simplest model the membrane tether, which exits from the C terminus of the globular FtsZ, would have to be on the outside of the curved pf. However, it is well established that tubulin rings have the C terminus on the inside of the ring. Could FtsZ and tubulin rings have the opposite curvature? In the present study we explored the direction of curvature of FtsZ rings by fusing large protein tags to the N or C terminus of the FtsZ globular domain. FtsZ with a protein tag on the N terminus did not assemble tubes. This was expected if the N terminus is on the inside, because the protein tags are too big to fit in the interior of the tube. FtsZ with C-terminal tags assembled normal tubes, consistent with the C terminus on the outside. The FN extension was not visible in negative stain, but thin section EM gave definitive evidence that the C-terminal tag was on the outside of the tubes. This has interesting implications for the evolution of tubulin. It seems likely that tubulin began with the curvature of FtsZ, which would have resulted in pfs curving toward the interior of a disassembling MT. Evolution not only eliminated this undesirable curvature, but managed to reverse direction to produce the outward curving rings, which is useful for pulling chromosomes.