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Measurement of the polarization of strange quark in the nucleon and determination of quark fragmentation functions into hadronsMakke, Nour 28 October 2011 (has links) (PDF)
Understanding the nucleon structure is currently one of the main challenges encountered in nuclear physics. The present work represents a contribution to the study of the nucleon structure and deals, in particular, with the study of the role of strange quarks in the nucleon. The latter can be investigated by determing the strange quark distribution in the nucleon as well as the contribution of the spins of strange quarks to the nucleon spin ($\Delta s$). This work first presents a measurement of $\Delta s$ performed via Deeply Inelastic Scattering of a muon beam off polarized proton and deuterium targets. The result is found to be strongly dependent on the quark fragmentation functions into hadrons (FFs), which define the probability that a quark of a given flavour fragments into a final state hadron. The FFs are poorly known, in particular, the FF of strange quark into kaons, which play an important role in the determination of $\Delta s$. In deep inelastic scattering process, the access to the FFs is provided by the hadron multiplicities which, in turn, define the average number of hadrons produced per DIS event. Pion and kaon multiplicities have been extracted versus different kinematic variables, using DIS data collected by deeply inelastic scattering of a $160$ GeV muons off a deuterium target. A first LO extraction of the fragmentation functions has then been performed using the measured pion and kaon multiplicities.
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Studies of Diffractive Scattering of Photons at Large Momentum Transfer And of the VFPS Detector at HERAHreus, Tomas 26 September 2008 (has links)
In this thesis, two studies of the diffractive phenomena in the electron proton collisions with the H1 detector at HERA are presented.
The first is the study of the inclusive elastic diffractive events $ep o eXp$ in the regime of high photon virtuality ($Q^2 >$ few GeV$^2$), with the scattered proton detected by the Very Forward Proton Spectrometer (VFPS). The VFPS detector, designed to measure diffractive scattered protons with high acceptance, has been installed in 2004 to benefit from the HERA II luminosity increase. The selected event sample of an integrated luminosity of 130.2 pb$^{-1}$ was collected in years 2006-2007. Data sample distributions are compared to the prediction
based on the diffractive parton distribution functions, as extracted from the H1 measurement of the diffractive structure function $F_2^{D(3)}$ at HERA I. After the study of the VFPS efficiency, the VFPS acceptance as a function of $xpom$ is estimated and studied in relation to the forward proton beam optics.
The second study leads to the cross section measurement of the diffractive scattering of quasi-real photons off protons, $gamma p o gamma Y$, with the large momentum transfer, $|t|$. The final state photon is separated from the proton dissociation system, $Y$, by a large rapidity gap and has a large transverse momentum, $p_T > 2$ GeV. Large $p_T$ imply the presence of the hard scale $t$ ($|t| simeq p_T^2$) and allows predictions of the perturbative QCD to be applied. The measurement is based on an integrated luminosity 46.2 pb$^{-1}$
of data collected in the 1999-2000 running period. Cross sections $sigma(W)$ as a function of the incident photon-proton centre of mass energy, $W$, and $ud sigma/ud |t|$ are measured in the range $Q^2 < 0.01$ GeV$^2$, $175 < W < 247$ GeV, $4 < |t| < 36$ GeV$^2$ and $ypom < 0.05$. The cross section measurements have been compared to predictions of LLA BFKL calculations.
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Telling tales of identity: an interpretation of women's narrativesBarthus, Tatum Terri January 2011 (has links)
<p>This paper examines selected discourses found in the journals kept by 21 working-class women during a training course for domestic workers in South Africa. The principal aim of the paper is to examine how emotion, voice and agency are expressed through literacy practices such as writing. With critical discourse analysis, the existing literacy levels of these women are revealed as well as the way in which women express identity, agency and emotion through the act of writing and reflecting on their experiences. A secondary aim is to uncover those recurrent discourses and attitudes that either empower or disempower these women. This is done to showcase how women&rsquo / s perception of themselves and their opportunities help them become active or inactive agents in their communities and families. Contributions are made to the study of women&rsquo / s language and literacy practices, with particular investigation of how their identities are shaped and moulded by language use. Critical discourse analysis and narrative analysis are the main analytical tools used in the study, highlighting aspects like agency, voice and ideology. These aspects are examined through the lens of women&rsquo / s experiences.</p>
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Direct Income Payments: Turkish ExperienceCetin, Selcan 01 September 2010 (has links) (PDF)
In 2001, Turkey started an agricultural reform program which ended at the end of 2008. The major component of the reform program was to make the transfers decoupled from production. In this scope, direct income support (DIS) was the tool that has been used to reduce the price distortions. DIS received noteworthy criticisms since the first signs of it and now, even after it is over, the prejudice against DIS prevails in Turkey. On the other hand, Turkey&rsquo / s commitments to WTO&rsquo / s Agreement on Agriculture insist on replacing price supports with non-distortionary policy tools and its candidacy to the membership of the EU requires harmonizing its agricultural policy to the CAP which is shifting towards direct income payments. Criticisms against DIS in Turkey are determined in this thesis, grouped and analyzed by investigating official data to see whether the fears came true. There were both rational and irrational criticisms and consequently, they could not be justified and agricultural issues were not worse off in DIS years. Turkey will eventually have to implement direct income payments again due to both domestic and international forces. Therefore, it is essentially important to understand how it was implemented previously and which aspects of it were exposed to criticisms, and design future policies accordingly.
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Die „Theorie der kognitiven Dissonanz“ – fruchtbar oder obsolet?Mothes, Cornelia 06 August 2008 (has links) (PDF)
Der vorliegende Aufsatz unternimmt den Versuch, die einst für die Kommunikationswissenschaft höchst relevante „Theorie der kognitiven Dissonanz“ des Sozialpsychologen Leon Festinger erneut ins wissenschaftliche Bewusstsein zu rücken. Während der Dissonanzforschung innerhalb der Psychologie auch heute noch Erkenntnispotentiale zugesprochen werden, ist sie in der Kommunikationswissenschaft kaum mehr von Bedeutung. Betrachtet man aber aktuelle Forschungsfragen, mit denen sich Kommunikationswissenschaftler beschäftigen, fällt auf, dass gerade die Dissonanzforschung alternative Erklärungen für gegenwärtige Probleme in Mediengesellschaften bieten kann. Diese Annahme wird am Beispiel der Politikverdrossenheit und unter Rückgriff auf das Konzept der „Dis-Identification“ einer explorativen Prüfung unterzogen. / This paper attempts to reconsider the value of Festinger’s „Theory of Cognitive Dissonance“ on mass media topics. Investigations in cognitive dissonance still represent an important field of research in social psychology. Yet, despite having once been one of the most important psychological theories on selective exposure, the concept is barely seen as relevant to current communication studies. Indeed, Festinger’s assertions have lost scientific importance in media studies. However, if one examines the present research topics in communication science, several objects of investigation can be identified that seem to call for psychological explanations in general and for Dissonance Theory predictions in particular. Thus, a reintegration seems to be worthwhile. The author exemplifies this intention by connecting political malaise with the concept of “Dis-identification”.
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Telling tales of identity: an interpretation of women's narrativesBarthus, Tatum Terri January 2011 (has links)
<p>This paper examines selected discourses found in the journals kept by 21 working-class women during a training course for domestic workers in South Africa. The principal aim of the paper is to examine how emotion, voice and agency are expressed through literacy practices such as writing. With critical discourse analysis, the existing literacy levels of these women are revealed as well as the way in which women express identity, agency and emotion through the act of writing and reflecting on their experiences. A secondary aim is to uncover those recurrent discourses and attitudes that either empower or disempower these women. This is done to showcase how women&rsquo / s perception of themselves and their opportunities help them become active or inactive agents in their communities and families. Contributions are made to the study of women&rsquo / s language and literacy practices, with particular investigation of how their identities are shaped and moulded by language use. Critical discourse analysis and narrative analysis are the main analytical tools used in the study, highlighting aspects like agency, voice and ideology. These aspects are examined through the lens of women&rsquo / s experiences.</p>
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Die vader-seun-verhouding binne 'n postkoloniale konteks : Indishce duinen van Adriaan van Dis = The relationship between father and son within a post-colonial context : Indische duinen by Adriaan van Dis.Dubbeld, Gys. January 2004 (has links)
This study examines the relationship between father and son in the novel Indische duinen (1994, 2002) by Adriaan van Dis within the context of post-war and postcolonial Dutch society. It relates the process by which an adult son, 36 years after the death of his father, comes to terms with the memory of a man whom he has always seen as unreasonably strict, violent and even cruel. During this process the son discovers the effects of colonialism, war, the Japanese occupation of the Dutch East Indies (subsequently Indonesia) and the process of rapid decolonisation and repatriation to the Netherlands upon his father. For the father the latter experiences amount to what Kaja Silverman (1992: 55) refers to as "historical trauma". The experiences that shaped his father and influenced his behaviour towards his son are linked to what Paul Ricoeur (1992: 121) would refer to as the father's "narrative identity" and his sense of masculinity (Cormell, 1995: 77 - 81) which have both been marginalised within the "dominant fiction" (Silverman, 1992: 54) of the postcolonial society in which he has been forced to live. As the son discovers the father through a process of retelling both his father's story and the story of their relationship he is able to gain sense of understanding and closure. Regarding issues of race and gender in Dutch colonialism and the trauma of postcolonial alienation this study draws upon the insights of E.M. Beekman (1988 and 1998), Frances Gouda (1998), Elsbeth Locher-SchoIten (1995), Rob Nieuwenhuys (1982), Edy Seriese (1995), Ann Laura Stoler (1992, 1995 and 1997) and Peter van Zonneveld (1995, 2002 and 2003). / Thesis (M.A.) - University of KwaZulu-Natal, Durban, 2004.
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What if IAS/IFRS were a Tax Base? New Empirical Evidence from an Austrian Perspective.Eberhartinger, Eva, Klostermann, Margret January 2006 (has links) (PDF)
In particular in Germany and Austria, but also in other countries, extensive theoretical and analytical research has been published on the potential tax effects in case IAS/IFRS were used as the basis for corporate taxation. Very few quantitative papers exist. This motivated us to conduct a study that quantifies the actual effects of a potential decisiveness of IAS/IFRS for the national tax base - without further questioning the usefulness of an IAS/IFRS relevance. Our paper extends existing research substantially. The research question of our paper deals with the measurement of differences in discounted tax burden in different scenarios, by simulation. Our sample comprises original data of 61 Austrian companies. The median of the difference between book values of IAS/IFRS single accounts and tax accounts for specific balance sheet items is determined. We then apply the result on the items of a typical corporate account derived from an Austrian database. As a result, depending on the term of items, we can calculate the discounted tax effects for different scenarios. It must be underlined that such highly confidential and detailed tax data is usually not available to researchers. The main preliminary finding of our empirical survey is that only in few cases we find essential differences between IAS/IFRS and tax accounts. Our evidence suggests that no dramatic change in the tax base has to be expected. Our study provides not only new empirical evidence but also a basis for further research on a possible common consolidated corporate tax base from an academic perspective. (author's abstract) / Series: Working Papers / Institut für Revisions-, Treuhand- und Rechnungswesen
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“It could just as well be my body” : A posthumanist and phenomenological study of the becomings of an embodied female subject and her experiences of fitting and misfitting in relation to cosmetic body modificationsViktorsson Blom, Linnéa January 2014 (has links)
This thesis is a phenomenological study that has been carried out via two semi-structured interviews with an - in conventional ways of categorising - 22 years old white, heterosexual, and middleclass Swedish woman, referred to as “Andrea”. The thesis aims to explore the becomings of Andrea in connection with cosmetic body modifications and her experiences in relation to this of fitting and misfitting, which are related to the dis/ability system. The aim of this thesis has also been to situate her as an embodied female subject in an intersectional context, in addition to her own experiences, as multiple social categorizations intra-act in the creation of dis/ability. The thesis takes its point of departure in Rosi Braidotti’s theorization of nomadic subjectivity and employs her notion of subjectivity as a negotiation between desire and power, with the goal of analysing the affirmative potential of cosmetic body modifications, as well as being critical towards them and their effects. Rosemarie Garland-Thomson’s concepts of fitting/misfitting are used in order to analyse the intra-actions between body and environment as well as how cosmetic body modifications affect the fit and/or misfit of Andrea. Sara Ahmed’s notion of orientation has been employed in relation to this, with the aim of showing how beauty, whiteness, femininity, and economic wealth are produced and sustained. In the thesis it is analysed how Andrea, in complex ways desires molarity at the same time as she actively resists “fixed” positionings of her. Andrea contributes to a deconstruction of the fixity of molar identity as her resistance disrupts the flow of expected behaviors - something which creates moments of imperceptibility. The thesis furthermore argues that Andrea uses cosmetic body modifications as an affirmative deconstruction of power in addition to it being a force that drives her towards the desired molarity.
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(Des)localização do meio e outras rotas : trânsito entre meiosCezar, Claudia Zimmer de Cerqueira January 2014 (has links)
A presente pesquisa busca desenvolver um pensamento reflexivo entrecruzando teoria e prática artística. Para tanto, o texto tece considerações acerca de trabalhos constituídos através de deslocamentos, tendo como disparador inicial a sequência de visitas a lugares cujos topônimos incluem a palavra “meio” ou “meia”, conforme acontece no projeto (Des)localização do Meio. Outros lugares também são visitados, não integrando o conjunto supracitado, porém compreendendo o que se chama aqui de “outras rotas”. Independentemente da definição de cada um, o fato de trabalhar sempre com os mesmos lugares e isolá-los de seus contextos agrega-lhes um caráter (des)locado. Nesse processo, são importantes os seguintes aspectos: o termo “meio”, que surge como articulador poético na criação dos trabalhos e na escrita; a “cartografia”, por evidenciar questões de transitoriedade, provisoriedade e (des)localização; os “títulos” dos trabalhos, que agem como elo entre o sensível e o conceitual e como disparador de contextos outros para além dos visitados; a “paisagem”, pensada como uma relação (aquilo que se encontra entre nós e o lugar); a “rota”, que configura o caminho traçado, a experiência do trilhado, o ponto de partida e o de chegada aos lugares visitados, bem como o modo de elaboração de imagens; a “fotografia”, que dá corpo à prática artística ora investigada, mas que frequentemente desliza para outros meios, uma vez que, de mesmo modo, são realizados trabalhos em vídeos, publicações, desenhos, instalações, objetos, etc. Frente às considerações acima, os diferentes conceitos que atravessam a pesquisa e os distintos modos de apresentação dos trabalhos assinalam o “trânsito entre meios” anunciado no título desta abordagem. / This study conducts reflexive thinking combining theory and artistic practice. It presents considerations about works constituted through movements, with the initial stimulus being a series of visits to places whose toponyms include the word “meio” or “meia” [which in Portuguese can mean middle, medium or milieu] as found in the project (Des)localização do Meio [Shifts in the Milieu]. Other places are also visited, which are not part of this group, although they include what we call “other paths.” Regardless of the definition of each one, the fact that we always work with the same places and isolate them from the contexts gives them a (dis)located character. The following aspects are important in this process: the term “meio” which appeared as a poetic articulator in the creation of the works and in the writing; “cartography,” because it reveals the transitory, provisory and (dis)location; the “titles” of the works, which serve as a link between the sensitive and the conceptual and as a trigger of the other contexts beyond those visited; “landscape”, thought of as a relationship (that between us and a place); and the “path”, which shapes the route taken, the experience of the trail-traveled, the starting and arrival points of the places visited, as well as the form of elaboration of images; “photography”, which gives shape to the artistic practice being investigated, and which frequently slips into other mediums, given that works are also conducted in video, publications, designs, installations, objects, etc. Given these considerations, the different concepts found in the study and the various modes of presentation of the work indicate the “transit between milieus” indicated in the title of this approach.
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