801 research outputs found

    On transverse momentum event–by–event fluctuations in string hadronic models

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    Transverse momentum event-by-event fluctuations are studied within the string-hadronic model of high energy nuclear collisions, LUCIAE. Data on non-statistical pT fluctuations in p+p interactions are reproduced. Fluctuations of similar magnitude are predicted for nucleus-nucleus collisions, in contradiction to the preliminary NA49 results. The introduction of a string clustering mechanism (Firecracker Model) leads to a further, significant increase of pT fluctuations for nucleus-nucleus collisions. Secondary hadronic interactions, as implemented in LUCIAE, cause only a small reduction of pT fluctuations

    Inspiring initiative

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    The food-versus-fuel crisis, the need for alternative energy resources and obstacles to forging closer East Asian economic cooperatio

    Minimizing the Cost and Enhancing the Security for Cloud Hosting Service

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    Cloud computing is a new emerging technology which provides different kinds of services through internet and reduces maintenance cost as well as provides data reliability. Now a days many cloud service providers are providing services with different policies and prices. But it leads difficult to customers to choose cloud services with less price. That clients as a rule put their information into a single cloud and after that just trust to luckiness. Proposing new data hosting technique termed as CHARM which supports two strong functionalities.The first is selecting a few suitable clouds and a fitting excess system to store information with minimized financial expense and ensured accessibility.The second is setting off a move procedure to re-disperse information as indicated by the varieties of information access example and evaluating of clouds.In this project defining secret sharing algorithm to reduce the risk of data intrusion and the loss of service availability in the cloud and ensure data integrity. Finally proposed scheme not only saves the cost and also Maintains data and price adjustments

    The MOUSE approach: Mapping Ontologies using UML for System Engineers

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    To address the problem of semantic heterogeneity, there has been a large body of research directed toward the study of semantic mapping technologies. Although various semantic mapping technologies have been investigated,  facilitating the process for domain experts to perform a semantic data integration task is still not easy. This is because one is required not only to possess domain expertise but also to have a good understanding of knowledge engineering. This paper proposes an approach that automatically transforms an abstract semantic mapping syntax into a concrete executable mapping syntax, we call this approach MOUSE (Mapping Ontologies using UML for System Engineers). In order to evaluate MOUSE, an implementation of this approach for a semantic data integration use case has been developed (called SDI, Semantic Data Integration). The aim is to enable domain experts, particularly system engineers, to undertake mappings using a technology that they are familiar with (UML), while ensuring the created mappings are accurate and the approach is easy to use. The proposed UML-based abstract mapping syntax is evaluated through usability experiments conducted in a lab environment by participants who have skills equivalent to real life system engineers using the SDI tool. Results from the evaluations show that the participants could correctly undertake the semantic data integration task using the MOUSE approach while maintaining accuracy and usability (in terms of ease of use)

    Pion interferometry in Au+Au collisions at sqrt[sNN]=200GeV

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    We present a systematic analysis of two-pion interferometry in Au+Au collisions at sqrt[sNN]=200GeV using the STAR detector at Relativistic Heavy Ion Collider. We extract the Hanbury-Brown and Twiss radii and study their multiplicity, transverse momentum, and azimuthal angle dependence. The Gaussianness of the correlation function is studied. Estimates of the geometrical and dynamical structure of the freeze-out source are extracted by fits with blast-wave parametrizations. The expansion of the source and its relation with the initial energy density distribution is studied

    Linking Ethnic Identification to Organisational Solidarity

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    This paper investigates the process through which ethnic identification (EI) influences employees’ sense of organisational solidarity (OS). A survey of 1525 employees working in different ministries of a state government in Nigeria was collected and analysed by means of a regression to investigate EI-OS relationships. As expected, EI was a significant determinant of OS with co-worker social support explaining the rationale for EI-OS relationship. The conceptualisation of OS as a composite construct that manifest in employees’ self-efficacy, organisational self-identity and employee voice behaviours is novel. The study provides evidence from an under researched area to further generalise existing debates

    Determinants of Health-Related Quality of Life (HRQoL) in the Multiethnic Singapore Population - A National Cohort Study

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    Background: HRQoL is an important outcome to guide and promote healthcare. Clinical and socioeconomic factors may influence HRQoL according to ethnicity. Methodology: A multiethnic cross-sectional national cohort (N = 7198) of the Singapore general population consisting of Chinese (N = 4873), Malay (N = 1167) and Indian (N = 1158) adults were evaluated using measures of HRQoL (SF-36 version 2), family functioning, health behaviours and clinical/laboratory assessments. Multiple regression analyses were performed to identify determinants of physical and mental HRQoL in the overall population and their potential differential effects by ethnicity. No a priori hypotheses were formulated so all interaction effects were explored. Principal Findings: HRQoL levels differed between ethnic groups. Chinese respondents had higher physical HRQoL (PCS) than Indian and Malay participants (p<0.001) whereas mental HRQoL (MCS) was higher in Malay relative to Chinese participants (p<0.001). Regressions models explained 17.1% and 14.6% of variance in PCS and MCS respectively with comorbid burden, income and employment being associated with lower HRQoL. Age and family were associated only with MCS. The effects of gender, stroke and musculoskeletal conditions on PCS varied by ethnicity, suggesting non-uniform patterns of association for Chinese, Malay and Indian individuals. Conclusions: Differences in HRQoL levels and determinants of HRQoL among ethnic groups underscore the need to better or differentially target population segments to promote well-being. More work is needed to explore HRQoL and wellness in relation to ethnicity
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