2,126 research outputs found

    An exploration into identity formation in young people living with a chronic illness

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    Section A critically reviews relevant theoretical literature and empirical studies exploring the particular impact of chronic illness on identity formation in adolescents. Theoretical conceptualisations of the adolescent period and of the process of identity formation are explored. Following this, empirical literature regarding the impact of chronic illness on the developmental tasks of adolescence and in particular identify formation will be critically examined. A number of clinical implications are discussed to enable clinicians to effectively support young people and future research directions are outlined. Section B reports a narrative analysis of young people's experiences of forming an identity with a diagnosis of an adolescent-onset chronic illness (CI). Identity formation is argued to be one of the key developmental tasks of adolescence. Despite implications for adolescent development, research into CI onset during this period has been notably sparse. This study aimed to explore how diagnosis impacts on the developmental tasks of adolescence, what role adolescent-onset CI plays in identity formation, and how adolescents incorporate the diagnosis into their identity. Individual semi-structured interviews were carried out with 8 young people aged 14-19 who lived with a diagnosis of a CI diagnosed between the ages of 12-16 years. Two illness types were studied; crohn’s disease and juvenile idiopathic arthritis. Interviews were audio-recorded, transcribed and analysed using narrative analysis. Participant narratives contained five core narrative themes: Walking a different path, tolerating contradiction, a changed interface with others, locating power and a fluid relationship. Narratives were considered to have been influenced by factors such as the interview context and dominant social narratives concerning health and illness. Adolescent-onset CI was found to have a significant, though not exclusively negative, impact on developmental tasks. The findings are discussed in relation to existing literature and potential clinical implications. Section C critically appraises the narrative study. A discussion begins with reflections on the research skills developed and insights into the research process. Areas of further learning are identified. Implications of clinical practice are explored and the section concludes with considerations for further research in this area

    Collisional Energy Loss of Non Asymptotic Jets in a QGP

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    We calculate the collisional energy loss suffered by a heavy (charm) quark created at a finite time within a Quark Gluon Plasma (QGP) in the classical linear response formalism as in Peigne {\it et al.} \cite{peigne}. We pay close attention to the problem of formulating a suitable current and the isolation of binding and radiative energy loss effects. We find that unrealistic large binding effects arising in previous formulations must be subtracted. The finite time correction is shown to be important only for very short length scales on the order of a Debye length. The overall energy loss is similar in magnitude to the energy loss suffered by a charge created in the asymptotic past. This result has significant implications for the relative contribution to energy loss from collisional and radiative sources and has important ramifications for the ``single electron puzzle'' at RHIC.Comment: 15 Pages, 11 figures, revte

    Scaling anisotropy of the power in parallel and perpendicular components of the solar wind magnetic field

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    Power spectra of the components of the magnetic field parallel (Pzz) and perpendicular (Pzz+Pyy) to the local mean magnetic field direction were determined by wavelet methods from Ulysses’ MAG instrument data during eighteen 10-day segments of its first North Polar pass at high latitude at solar minimum in 1995. The power depends on frequency f and the angle θ between the solar wind direction and the local mean field, and with distance from the Sun. This data includes the solar wind whose total power (Pxx + Pyy + Pzz) in magnetic fluctuations we previously reported depends on f and the angle θ nearly as predicted by the GS95 critical balance model of strong incompressible MHD turbulence. Results at much wider range of frequencies during six evenly-spaced 10-day periods are presented here to illustrate the variability and evolution with distance from the Sun. Here we investigate the aniso tropic scaling of Pzz(f,θ) in particular because it is a reduced form of the Poloidal (pseudo-Alfvenic) component of the (incompressible) fluctuations. We also report the much larger Pxx(f,θ)+Pyy(f,θ) which is (mostly) reduced from the Toroidal (Alfvenic, i.e., perpendicular to both B and k) fluctuations, and comprises most of the total power. These different components of the total power evolve and scale differently in the inertial range. We compare these elements of the magnetic power spectral tensor with “critical balance” model predictions

    Open heavy flavor production at RHIC

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    The study of heavy flavor production in relativistic heavy ion collisions is an extreme experimental challenge but provides important information on the properties of the Quark-Gluon Plasma (QGP) created in Au+Au collisions at RHIC. Heavy-quarks are believed to be produced in the initial stages of the collision, and are essential on the understanding of parton energy loss in the dense medium created in such environment. Moreover, heavy-quarks can help to investigate fundamental properties of QCD in elementary p+p collisions. In this work we review recent results on heavy flavor production and their interaction with the hot and dense medium at RHIC.Comment: Quark Matter 2006 proceedings, 8 pages, 5 figure

    Anisotropy of Imbalanced Alfvenic Turbulence in Fast Solar Wind

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    We present the first measurement of the scale-dependent power anisotropy of Elsasser variables in imbalanced fast solar wind turbulence. The dominant Elsasser mode is isotropic at lower spacecraft frequencies but becomes increasingly anisotropic at higher frequencies. The sub-dominant mode is anisotropic throughout, but in a scale-independent way (at higher frequencies). There are two distinct subranges exhibiting different scalings within what is normally considered the inertial range. The low Alfven ratio and shallow scaling of the sub-dominant Elsasser mode suggest an interpretation of the observed discrepancy between the velocity and magnetic field scalings. The total energy is dominated by the latter. These results do not appear to be fully explained by any of the current theories of incompressible imbalanced MHD turbulence.Comment: 5 pages, 2 figure

    Diagnosing Energy Loss: PHENIX Results on High-pT Hadron Spectra

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    Measurements of inclusive spectra of hadrons at large transverse momentum over a broad range of energy in different collision systems have been performed with the PHENIX experiment at RHIC. The data allow to study the energy and system size dependence of the suppression observed in RAA of high-pT hadrons at sqrt(s_NN)= 200 GeV. Due to the large energy range from sqrt(s_NN)= 22 GeV to 200 GeV, the results can be compared to results from CERN SPS at a similar energy. The large Au+Au dataset from the 2004 run of RHIC also allows to constrain theoretical models that describe the hot and dense matter produced in such collisions. Investigation of particle ratios such as eta/pi0 helps understanding the mechanisms of energy loss.Comment: 4 pages, 6 figures. To appear in the proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2006), Shanghai, China, November 14-20, 200

    Towards a More Productive Dialogue Between Stakeholder Theory and Strategic Management

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    This chapter highlights some of the tensions and most promising points of convergence between the strategic management and stakeholder theory literatures. We briefly examine the early development of both areas, identifying some of the background assumptions and choices that informed how the fields evolved, and how these factors led the two fields to engage in scholarly pursuits that seldom intersected for a period of years, followed by a renewal of interest among strategists in themes that are central to stakeholder theory. From this discussion, we develop a larger agenda with specific topics as examples of areas that offer promise for integrative research that can advance knowledge in both fields. Our vision of the future is one in which the larger aspirations of scholars in strategy and stakeholder theory are more fully realized with human purposes, broadly defined, as the focal point

    A Practitioner Critique of a Conceptual Paper on Measuring Value and Performance

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    Much of the business literature suggests that firm performance should be measured in financial terms, based on the notion that the primary obligation of a corporation is to provide high shareholder returns. An alternative literature is emerging in which scholars identify the many weaknesses associated with shareholder primacy, and offer alternative performance measures that are focused on a broader set of stakeholders. One such publication was provided to high-­‐level executives in large companies. The executives were then given the opportunity to critique the paper and to discuss the extent to which their firms are engaging in the types of performance measurement activities contained therein. This proposal is a direct response to the call by SMS leaders to engage practitioners in useful dialogues within our Society
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