6,791 research outputs found

    Strange and charm mesons at FAIR

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    We study the properties of strange and charm mesons in hot and dense matter within a self-consistent coupled-channel approach for the experimental conditions of density and temperature expected for the CBM experiment at FAIR/GSI. The in-medium solution at finite temperature accounts for Pauli blocking effects, mean-field binding of all the baryons involved, and meson self-energies. We analyze the behaviour in this hot and dense environment of dynamically-generated baryonic resonances together with the evolution with density and temperature of the strange and open-charm meson spectral functions. We test the spectral functions for strange mesons using energy-weighted sum rules and finally discuss the implications of the properties of charm mesons on the D_{s0}(2317) and the predicted X(3700) scalar resonances.Comment: 12 pages, 9 figures, invited talk at XXXI Mazurian Lakes Conference on Physics: Nuclear Physics and the Road to FAIR, August 30-September 6, 2009, Piaski, Polan

    Charmed hadrons in nuclear medium

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    We study the properties of charmed hadrons in dense matter within a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent manner. We analyze the behaviour in this dense environment of dynamically-generated baryonic resonances as well as the open-charm meson spectral functions. We discuss the implications of the in-medium properties of open-charm mesons on the Ds0(2317)D_{s0}(2317) and the predicted X(3700) scalar resonances.Comment: 4 pages, 5 figures, invited parallel talk in the 5th International Conference on Quarks and Nuclear Physics (QNP09), Beijing, September 21-26, 200

    Role of Mo in catalysts based on noble metals in hydrodeoxygenation reactions

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    The use of bio-energy as a renewable alternative to fossil fuels is nowadays attracting more and more attention. The bio-fuel from biomass seems to be a potential energy substitute for fossil fuels since it is a renewable resource that could contribute to sustainable development and global environmental preservation and it appears to have significant economic potential1. The problem is its high oxygen content, which gives undesirable properties for combustion. To remove oxygen, catalytic hydrodeoxygenation (HDO) reactions are carried out. Monometallic Mo/Si, Pt/Si as well as bimetallic PtMo/Si catalysts were prepared and evaluated in the hydrodeoxygenation (HDO)reaction of dibenzofurane (DBF) as a model molecule in biomass derived bio-oil.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    Charmed mesons in nuclear matter

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    We obtain the properties of charmed mesons in dense matter using a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent manner. We study the behaviour of dynamically-generated baryonic resonances together with the open-charm meson spectral functions in this dense nuclear environment. We discuss the implications of the in-medium properties of open-charm mesons on the Ds0(2317)D_{s0}(2317) and the predicted X(3700) scalar resonances, and on the formation of DD-mesic nuclei.Comment: 5 pages, 5 figures, 1 table, to appear in Proceedings of XIII International Conference on Hadron Spectroscopy, November 29 - December 4, 2009, Florida State Universit

    CASA-Mot technology: how results are affected by the frame rate and counting chamber

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    For over 30 years, CASA-Mot technology has been used for kinematic analysis of sperm motility in different mammalian species, but insufficient attention has been paid to the technical limitations of commercial computer-aided sperm analysis (CASA) systems. Counting chamber type and frame rate are two of the most important aspects to be taken into account. Counting chambers can be disposable or reusable, with different depths. In human semen analysis, reusable chambers with a depth of 10 mm are the most frequently used, whereas for most farm animal species it is more common to use disposable chambers with a depth of 20 mm. The frame rate was previously limited by the hardware, although changes in the number of images collected could lead to significant variations in some kinematic parameters, mainly in curvilinear velocity (VCL). A frame rate of 60 frames s(-1) is widely considered to be the minimum necessary for satisfactory results. However, the frame rate is species specific and must be defined in each experimental condition. In conclusion, we show that the optimal combination of frame rate and counting chamber type and depth should be defined for each species and experimental condition in order to obtain reliable results

    Breast treatments with Axxent equipment.Comparison with Mammosite for skin, lung and heart dose

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    Poster Session [EP-1314] Purpose or Objective We have treated 250 patients at our center from May 2015 to September 2017 for breast cancer with Axxent (Xoft Inc.) intraoperativ e radiotherapy (IORT) following the inclusion parameters of the TARGIT study, in this work we compare the doses in the skin of the first 150 patients treated with the 50 kVp source with the skin doses they would have received using the Mammosite kit using an Ir192 source. Material and Methods To the 250 patients treated in our center after removing the tumor, the appropriate balloon size is chosen to cover the tumor area with a dose of 20 Gy on the ball oon surface, the sizes used range fro m 30-65 cm3, after which it is verified that the distance to skin from the 3 closest points of the balloon i s less than 10 mm and then the treatment is carried out with an average duration of 10.3 minutes being the volumes of 30 and 35 cm3 the most used due to the inclusion criteria of the procedure. Treatment plans are previously per formed in a Brachyvision treatment planning system (TPS) (Varian Inc.) for each of the possible volumes. In tur n, another plan is calculated with the Mammosite applicator and Ir192 source, from which the skin dose of each control point is estimated, compared to our results. We present also the cases of acute dermatitis seen for these first 150 patients in a time less than 6 months after the surgical act and irradiation. Results The differences in maximum skin dose for bot h types of treatment are 8.1 ± 1.2 Gy for the case of Mammosite and 5.7 ± 1.5 Gy for patients treated with electronic source, due to the difference in the depht dos e percentage of both types of treatment (Image 1). This, in turn, explains the very few cases of acute dermatitis at 6 months (8 cases of grade 2 and 2 cases of grade 3) (Image 2) with no recurrence to date.We also show the mean and maximum doses (expressed as percentage of prescribed dose) for the left lung and heart in cases of left breast tumor for the volumes of 30 and 35 cm3, which are the most common volumes in our hospital (70% of cases): LEFT LUNG (Left Breast tratment) AXXENT MAMMOSITE Maximun Dose (%PD) 20.4% 29.9% Mean Dose (%PD) 1.0% 3.9% HEART (Left Breast tratment) AXXENT MAMMOSITE Maximun Dose (%PD) 4.1% 10.4% Mean Dose (%PD) 0.8% 3.3% Conclusion It is concluded that the IORT treatments performed with the Axxent equipment with electronic source are a good alternative to those performed with Ir192 and our 250 patients treated to date to the good results presented by other centers are joined.In additi on to the low skin toxicity, there is no recurrence in patients treated so far, which makes us very optimistic about the results

    Specifying and Analysing SOC Applications with COWS

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    COWS is a recently defined process calculus for specifying and combining service-oriented applications, while modelling their dynamic behaviour. Since its introduction, a number of methods and tools have been devised to analyse COWS specifications, like e.g. a type system to check confidentiality properties, a logic and a model checker to express and check functional properties of services. In this paper, by means of a case study in the area of automotive systems, we demonstrate that COWS, with some mild linguistic additions, can model all the phases of the life cycle of service-oriented applications, such as publication, discovery, negotiation, orchestration, deployment, reconfiguration and execution. We also provide a flavour of the properties that can be analysed by using the tools mentioned above
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