499 research outputs found

    Psychosoziale Aspekte bei transsexuellen Patienten in ambulanter Therapie und Begutachtung

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    Die Therapie transsexueller Patienten ist aufgrund ihrer fachübergreifenden Komplexität problematisch. Die Patienten suchen Hilfe bei der Umsetzung ihrer Vorstellungen zur Angleichung des äußeren Erscheinungsbildes entsprechend des empfundenen Geschlechts. Durch die Ausarbeitung zweier Stichproben konnte gezeigt werden, dass durch strukturiertes therapeutisches Vorgehen eine bessere Bewältigung interpersoneller und psychosozialer Probleme gegeben ist, so dass eine Festigung und Akzeptanz des transsexuellen Erlebens erreicht wird. Des Weiteren lassen sich voreilige Schritte bezüglich rechtlicher, hormoneller oder operativer Therapien erkennen, ohne dass Alltagstest und psychotherapeutische Betreuung erfolgt sind. Die Ergebnisse zeigen den Bedarf an Behandlungszentren, in denen nach standardisierten Behandlungsmethoden therapiert wird, damit der Leidensweg transsexueller Patienten durch eine adäquate, den individuellen Problemen angepasste Therapie verkürzt wird

    Research of the power plant operational states with block structure

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    In this article the research technique block structure power plant operational states is offered. As an example the operating power plant of OOO Siberian Generation Company with block structure of turbogenerators connection is considered. The choice of the operating power plant has allowed to receive to carry out the analysis real long and emergency states. The offered technique of states identification and the analysis can be used for power plant of other structure after the corresponding correction

    Realtime calibration of the A4 electromagnetic lead fluoride calorimeter

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    Sufficient energy resolution is the key issue for the calorimetry in particle and nuclear physics. The calorimeter of the A4 parity violation experiment at MAMI is a segmented calorimeter where the energy of an event is determined by summing the signals of neighbouring channels. In this case the precise matching of the individual modules is crucial to obtain a good energy resolution. We have developped a calibration procedure for our total absorbing electromagnetic calorimeter which consists of 1022 lead fluoride (PbF_2) crystals. This procedure reconstructs the the single-module contributions to the events by solving a linear system of equations, involving the inversion of a 1022 x 1022-matrix. The system has shown its functionality at beam energies between 300 and 1500 MeV and represents a new and fast method to keep the calorimeter permanently in a well-calibrated state

    Identifying Overlapping and Hierarchical Thematic Structures in Networks of Scholarly Papers: A Comparison of Three Approaches

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    We implemented three recently proposed approaches to the identification of overlapping and hierarchical substructures in graphs and applied the corresponding algorithms to a network of 492 information-science papers coupled via their cited sources. The thematic substructures obtained and overlaps produced by the three hierarchical cluster algorithms were compared to a content-based categorisation, which we based on the interpretation of titles and keywords. We defined sets of papers dealing with three topics located on different levels of aggregation: h-index, webometrics, and bibliometrics. We identified these topics with branches in the dendrograms produced by the three cluster algorithms and compared the overlapping topics they detected with one another and with the three pre-defined paper sets. We discuss the advantages and drawbacks of applying the three approaches to paper networks in research fields.Comment: 18 pages, 9 figure

    Porosity and Structure of Hierarchically Porous Ni/Al2O3 Catalysts for CO2 Methanation

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    CO2 methanation is often performed on Ni/Al2O3 catalysts, which can suffer from mass transport limitations and, therefore, decreased efficiency. Here we show the application of a hierarchically porous Ni/Al2O3 catalyst for methanation of CO2. The material has a well-defined and connected meso- and macropore structure with a total porosity of 78%. The pore structure was thoroughly studied with conventional methods, i.e., N2 sorption, Hg porosimetry, and He pycnometry, and advanced imaging techniques, i.e., electron tomography and ptychographic X-ray computed tomography. Tomography can quantify the pore system in a manner that is not possible using conventional porosimetry. Macrokinetic simulations were performed based on the measures obtained by porosity analysis. These show the potential benefit of enhanced mass-transfer properties of the hierarchical pore system compared to a pure mesoporous catalyst at industrially relevant conditions. Besides the investigation of the pore system, the catalyst was studied by Rietveld refinement, diffuse reflectance ultraviolet-visible (DRUV/vis) spectroscopy, and H2-temperature programmed reduction (TPR), showing a high reduction temperature required for activation due to structural incorporation of Ni into the transition alumina. The reduced hierarchically porous Ni/Al2O3 catalyst is highly active in CO2 methanation, showing comparable conversion and selectivity for CH4 to an industrial reference catalyst

    Measurement of the Transverse Beam Spin Asymmetry in Elastic Electron Proton Scattering and the Inelastic Contribution to the Imaginary Part of the Two-Photon Exchange Amplitude

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    We report on a measurement of the asymmetry in the scattering of transversely polarized electrons off unpolarized protons, A_\perp, at two Q2^2 values of \qsquaredaveragedlow (GeV/c)2^2 and \qsquaredaveragedhighII (GeV/c)2^2 and a scattering angle of 30<θe<4030^\circ < \theta_e < 40^\circ. The measured transverse asymmetries are A_{\perp}(Q2^2 = \qsquaredaveragedlow (GeV/c)2^2) = (\experimentalasymmetry alulowcorr ±\pm \statisticalerrorlowstat_{\rm stat} ±\pm \combinedsyspolerrorlowalucorsys_{\rm sys}) ×\times 106^{-6} and A_{\perp}(Q2^2 = \qsquaredaveragedhighII (GeV/c)2^2) = (\experimentalasymme tryaluhighcorr ±\pm \statisticalerrorhighstat_{\rm stat} ±\pm \combinedsyspolerrorhighalucorsys_{\rm sys}) ×\times 106^{-6}. The first errors denotes the statistical error and the second the systematic uncertainties. A_\perp arises from the imaginary part of the two-photon exchange amplitude and is zero in the one-photon exchange approximation. From comparison with theoretical estimates of A_\perp we conclude that π\piN-intermediate states give a substantial contribution to the imaginary part of the two-photon amplitude. The contribution from the ground state proton to the imaginary part of the two-photon exchange can be neglected. There is no obvious reason why this should be different for the real part of the two-photon amplitude, which enters into the radiative corrections for the Rosenbluth separation measurements of the electric form factor of the proton.Comment: 4 figures, submitted to PRL on Oct.

    Evidence for Strange Quark Contributions to the Nucleon's Form Factors at Q2Q^2 = 0.108 (GeV/c)2^2

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    We report on a measurement of the parity violating asymmetry in the elastic scattering of polarized electrons off unpolarized protons with the A4 apparatus at MAMI in Mainz at a four momentum transfer value of Q2Q^2 = \Qsquare (GeV/c)2^2 and at a forward electron scattering angle of 30<θe<40^\circ < \theta_e < 40^\circ. The measured asymmetry is ALR(ep)A_{LR}(\vec{e}p) = (\Aphys ±\pm \Deltastatstat_{stat} ±\pm \Deltasystsyst_{syst}) ×\times 106^{-6}. The expectation from the Standard Model assuming no strangeness contribution to the vector current is A0_0 = (\Azero ±\pm \DeltaAzero) ×\times 106^{-6}. We have improved the statistical accuracy by a factor of 3 as compared to our previous measurements at a higher Q2Q^2. We have extracted the strangeness contribution to the electromagnetic form factors from our data to be GEsG_E^s + \FakGMs GMsG_M^s = \GEsGMs ±\pm \DeltaGEsGMs at Q2Q^2 = \Qsquare (GeV/c)2^2. As in our previous measurement at higher momentum transfer for GEsG_E^s + 0.230 GMsG_M^s, we again find the value for GEsG_E^s + \FakGMs GMsG_M^s to be positive, this time at an improved significance level of 2 σ\sigma.Comment: 4 pages, 3 figure

    The impact of diabetes on multiple avoidable admissions: a cross-sectional study

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    Background Multiple admissions for ambulatory care sensitive conditions (ACSC) are responsible for an important proportion of health care expenditures. Diabetes is one of the conditions consensually classified as an ACSC being considered a major public health concern. The aim of this study was to analyse the impact of diabetes on the occurrence of multiple admissions for ACSC. Methods We analysed inpatient data of all public Portuguese NHS hospitals from 2013 to 2015 on multiple admissions for ACSC among adults aged 18 or older. Multiple ACSC users were identified if they had two or more admissions for any ACSC during the period of analysis. Two logistic regression models were computed. A baseline model where a logistic regression was performed to assess the association between multiple admissions and the presence of diabetes, adjusting for age and sex. A full model to test if diabetes had no constant association with multiple admissions by any ACSC across age groups. Results Among 301,334 ACSC admissions, 144,209 (47.9%) were classified as multiple admissions and from those, 59,436 had diabetes diagnosis, which corresponded to 23,692 patients. Patients with diabetes were 1.49 times (p < 0,001) more likely to be admitted multiple times for any ACSC than patients without diabetes. Younger adults with diabetes (18–39 years old) were more likely to become multiple users. Conclusion Diabetes increases the risk of multiple admissions for ACSC, especially in younger adults. Diabetes presence is associated with a higher resource utilization, which highlights the need for the implementation of adequate management of chronic diseases policies.NOVASaudeinfo:eu-repo/semantics/publishedVersio
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