101 research outputs found

    Die Spiritualität der Schönstattbewegung: eine historische Studie zur missionarischen Spiritualität neuer kirchlicher Bewegungen

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    Auch im Buchhandel erhältlich: Die Spiritualität der Schönstattbewegung : eine historische Studie zur missionarischen Spiritualität neuer kirchlicher Bewegungen / von Hinrich E. Bues. - Münster : Monsenstein und Vannerdat, 2007. - 253 S. (Forschungen zur Volkskunde ; 54 : Abteilung Kirchen- und Ordensgeschichte ; 1) ISBN 978-3-86582-429-5 Preis: 17,80 €Die elektronische Fassung ist mit dem gedruckten Buch vollkommen identisch

    Detailed Spectroscopic and Photometric Analysis of DQ White Dwarfs

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    We present an analysis of spectroscopic and photometric data for cool DQ white dwarfs based on improved model atmosphere calculations. In particular, we revise the atmospheric parameters of the trigonometric parallax sample of Bergeron et al.(2001), and discuss the astrophysical implications on the temperature scale and mean mass, as well as the chemical evolution of these stars. We also analyze 40 new DQ stars discovered in the first data release of the Sloan Digital Sky Survey.Comment: 6 pages,3 figures, 14th European Workshop on White Dwarfs, ASP Conference Series, in pres

    From Pathogens to People: Enhancing Reporting and Surveillance for more Effective Control of Disease Outbreaks

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    Infectious disease outbreaks are a threat to global health and security. Current systems for early and effective reporting and monitoring of pathogens and other health threats, and high-quality surveillance of human diseases, face a number of challenges including incomplete and fragmented early warning and governance systems that are under-incentivised and under-resourced. We propose a number of opportunities for the G20 leaders to address these challenges, including: (1) establishing an ‘Emerging Health Threat Data Platform’ as a public good for independent, co-ordinated and scientist-led reporting and surveillance of pathogens; (2) supporting the development of a framework to incentivise scientists to participate in the platform and; (3) enhancing population health surveillance and vital registration systems through technical and financial investments in both the short and longer term

    Beam mask and sliding window-facilitated deep learning-based accurate and efficient dose prediction for pencil beam scanning proton therapy

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    Purpose: To develop a DL-based PBSPT dose prediction workflow with high accuracy and balanced complexity to support on-line adaptive proton therapy clinical decision and subsequent replanning. Methods: PBSPT plans of 103 prostate cancer patients and 83 lung cancer patients previously treated at our institution were included in the study, each with CTs, structure sets, and plan doses calculated by the in-house developed Monte-Carlo dose engine. For the ablation study, we designed three experiments corresponding to the following three methods: 1) Experiment 1, the conventional region of interest (ROI) method. 2) Experiment 2, the beam mask (generated by raytracing of proton beams) method to improve proton dose prediction. 3) Experiment 3, the sliding window method for the model to focus on local details to further improve proton dose prediction. A fully connected 3D-Unet was adopted as the backbone. Dose volume histogram (DVH) indices, 3D Gamma passing rates, and dice coefficients for the structures enclosed by the iso-dose lines between the predicted and the ground truth doses were used as the evaluation metrics. The calculation time for each proton dose prediction was recorded to evaluate the method's efficiency. Results: Compared to the conventional ROI method, the beam mask method improved the agreement of DVH indices for both targets and OARs and the sliding window method further improved the agreement of the DVH indices. For the 3D Gamma passing rates in the target, OARs, and BODY (outside target and OARs), the beam mask method can improve the passing rates in these regions and the sliding window method further improved them. A similar trend was also observed for the dice coefficients. In fact, this trend was especially remarkable for relatively low prescription isodose lines. The dose predictions for all the testing cases were completed within 0.25s

    Clinical commissioning of intensity-modulated proton therapy systems: Report of AAPM Task Group 185

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    Proton therapy is an expanding radiotherapy modality in the United States and worldwide. With the number of proton therapy centers treating patients increasing, so does the need for consistent, high-quality clinical commissioning practices. Clinical commissioning encompasses the entire proton therapy system\u27s multiple components, including the treatment delivery system, the patient positioning system, and the image-guided radiotherapy components. Also included in the commissioning process are the x-ray computed tomography scanner calibration for proton stopping power, the radiotherapy treatment planning system, and corresponding portions of the treatment management system. This commissioning report focuses exclusively on intensity-modulated scanning systems, presenting details of how to perform the commissioning of the proton therapy and ancillary systems, including the required proton beam measurements, treatment planning system dose modeling, and the equipment needed

    Consensus Statement on Proton Therapy in Mesothelioma

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    Purpose: Radiation therapy for mesothelioma remains challenging, as normal tissue toxicity limits the amount of radiation that can be safely delivered to the pleural surfaces, especially radiation dose to the contralateral lung. The physical properties of proton therapy result in better sparing of normal tissues when treating the pleura, both in the postpneumonectomy setting and the lung-intact setting. Compared with photon radiation, there are dramatic reductions in dose to the contralateral lung, heart, liver, kidneys, and stomach. However, the tissue heterogeneity in the thorax, organ motion, and potential for changing anatomy during the treatment course all present challenges to optimal irradiation with protons. Methods: The clinical data underlying proton therapy in mesothelioma are reviewed here, including indications, advantages, and limitations. Results: The Particle Therapy Cooperative Group Thoracic Subcommittee task group provides specific guidelines for the use of proton therapy for mesothelioma. Conclusions: This consensus report can be used to guide clinical practice, insurance approval, and future research
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