397 research outputs found

    Sport tourism as a developmental initiative in the economy of Mafikeng

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    Sport plays an important role in the economic and social growth of a nation. The aim of this research was to assess and identify the difference Sport Tourism can make as a developmental initiative in the economy of Mafikeng. The research method employed in this study was restricted to the descriptivequantitative approach. The purpose of this quantitative approach was to examine the role between sport tourism and its impact on the economic activity of Mafikeng. The findings from the exploratory survey support the role of sport tourism to a city like Mafikeng and illustrate that it can improve its economic activity through the hosting of regular or small sport tourism events. It is recommended that small or regular sport tourism events should be hosted using existing facilities that do not require substantial financial investments

    Re: Lack of association between Matrix Metalloproteinase-1 (MMP-1) promoter polymorphism and risk of renal cell carcinoma

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    Federal University of São Paulo Section of NephrologyFederal University of São Paulo Section of UrologyInstitute of Energetic and Nuclear ResearchUNIFESP, Section of NephrologyUNIFESP, Section of UrologySciEL

    Hospitalised patients with suspected 2009 H1N1 Influenza A in a hospital in Norway, July - December 2009

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    <p>Abstract</p> <p>Background</p> <p>The main objective of this study was to describe the patients who were hospitalised at Oslo University Hospital Aker during the first wave of pandemic Influenza A (H1N1) in Norway.</p> <p>Methods</p> <p>Clinical data on all patients hospitalised with influenza-like illness from July to the end of November 2009 were collected prospectively. Patients with confirmed H1N1 Influenza A were compared to patients with negative H1N1 tests.</p> <p>Results</p> <p>182 patients were hospitalised with suspected H1N1 Influenza A and 64 (35%) tested positive. Seventeen patients with positive tests (27%) were admitted to an intensive care unit and four patients died (6%). The H1N1 positive patients were younger, consisted of a higher proportion of non-ethnic Norwegians, had a higher heart rate on admission, and fewer had pre-existing hypertension, compared to the H1N1 negative patients. However, hypertension was the only medical condition that was significantly associated with a more serious outcome defined as ICU admission or death, with a univariate odds ratio of the composite endpoint in H1N1 positive and negative patients of 6.1 (95% CI 1.3-29.3) and 3.2 (95% CI 1.2-8.7), respectively. Chest radiography revealed pneumonia in 24/59 H1N1 positive patients. 63 of 64 H1N1 positive patients received oseltamivir.</p> <p>Conclusions</p> <p>The extra burden of hospitalisations was relatively small and we managed to admit all the patients with suspected H1N1 influenza without opening new pandemic isolation wards. The morbidity and mortality were similar to reports from comparable countries. Established hypertension was associated with more severe morbidity and patients with hypertension should be considered candidates for vaccination programs in future pandemics.</p

    Nucleation of Al3Zr and Al3Sc in aluminum alloys: from kinetic Monte Carlo simulations to classical theory

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    Zr and Sc precipitate in aluminum alloys to form the compounds Al3Zr and Al3Sc which for low supersaturations of the solid solution have the L12 structure. The aim of the present study is to model at an atomic scale this kinetics of precipitation and to build a mesoscopic model based on classical nucleation theory so as to extend the field of supersaturations and annealing times that can be simulated. We use some ab-initio calculations and experimental data to fit an Ising model describing thermodynamics of the Al-Zr and Al-Sc systems. Kinetic behavior is described by means of an atom-vacancy exchange mechanism. This allows us to simulate with a kinetic Monte Carlo algorithm kinetics of precipitation of Al3Zr and Al3Sc. These kinetics are then used to test the classical nucleation theory. In this purpose, we deduce from our atomic model an isotropic interface free energy which is consistent with the one deduced from experimental kinetics and a nucleation free energy. We test di erent mean-field approximations (Bragg-Williams approximation as well as Cluster Variation Method) for these parameters. The classical nucleation theory is coherent with the kinetic Monte Carlo simulations only when CVM is used: it manages to reproduce the cluster size distribution in the metastable solid solution and its evolution as well as the steady-state nucleation rate. We also find that the capillary approximation used in the classical nucleation theory works surprisingly well when compared to a direct calculation of the free energy of formation for small L12 clusters.Comment: submitted to Physical Review B (2004
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