Disparity and optical flow partitioning using extended Potts priors

This paper addresses the problems of disparity and optical flow partitioning based on the brightness invariance assumption. We investigate new variational approaches to these problems with Potts priors and possibly box constraints. For the optical flow partitioning, our model includes vector-valued data and an adapted Potts regularizer. Using the notion of asymptotically level stable (als) functions, we prove the existence of global minimizers of our functionals. We propose a modified alternating direction method of multipliers. This iterative algorithm requires the computation of global minimizers of classical univariate Potts problems which can be done efficiently by dynamic programming. We prove that the algorithm converges both for the constrained and unconstrained problems. Numerical examples demonstrate the very good performance of our partitioning method

Daring to process the trauma: using a web-based training to reduce psychotherapists’ fears and reservations around implementing trauma-focused therapy

Sansen L, Saupe L, Steidl A, Fegert JM, Hoffmann U, Neuner F. Daring to process the trauma: using a web-based training to reduce psychotherapists’ fears and reservations around implementing trauma-focused therapy. European Journal of Psychotraumatology. 2019;10(1): 1696590.Although trauma-focused interventions are the first-line therapies for patients with posttraumatic stress disorder (PTSD), they are not frequently used in clinical practice. Factors preventing therapists from applying trauma-focused methods include a lack of training and negative attitudes towards trauma-focused therapy. The aim of the present study was to investigate which factors predict willingness to carry out trauma-focused therapy and to examine whether a web-based training is able to reduce negative attitudes and reservations about these interventions. In a wait-list controlled evaluation study, therapists (N = 499) were randomized into an intervention or a wait-list control group. Results show that trauma-treatment specific competencies and overcoming pre-existing concerns towards trauma-focused therapy significantly predict therapists’ willingness to utilize trauma-focused interventions. Thus, the content alignment of the web-based course is appropriate for improving therapists’ willingness to conduct trauma-focused therapy. A retrospective examination of therapists after the training and a comparison of fears and reservations before and after the training demonstrate a significant reduction of fears and reservations. In terms of perceived contraindications, no effects of the web-based training were found. The present study provides compelling evidence that web-based training in evidence-based PTSD therapy is able to reduce reservations that may prevent therapists from applying evidence-based trauma-focused interventions

Определение эффективности нейтронного детектора из пластического сцинтиллятора o100?200 мм

Рассчитывается и экспериментально проверяется эффективность детектора. к нейтронам сверхвысоких (десятки и сотни МэВ) энергий

Characterization of the KATRIN cryogenic pumping section

The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine the effective anti-electron neutrino mass with a sensitivity of 0.2 eV/c$^2$ by using the kinematics of tritium $\beta$-decay. It is crucial to have a high signal rate which is achieved by a windowless gaseous tritium source producing 10$^{11}$ $\beta$-electrons per second. These are guided adiabatically to the spectrometer section where their energy is analyzed. In order to maintain a low background rate below 0.01 cps, one essential criteria is to permanently reduce the flow of neutral tritium molecules between the source and the spectrometer section by at least 14 orders of magnitude. A differential pumping section downstream from the source reduces the tritium flow by seven orders of magnitude, while at least another factor of 10$^7$ is achieved by the cryogenic pumping section where tritium molecules are adsorbed on an approximately 3 K cold argon frost layer. In this paper, the results of the cryogenic pumping section commissioning measurements using deuterium are discussed. The cryogenic pumping section surpasses the requirement for the flow reduction of 10$^7$ by more than one order of magnitude. These results verify the predictions of previously published simulations