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« Je n’ai rien à cacher... quoique ?! » Un guide pratique pour mener des discussions en classe
(2020)
L’interaction entre les grands volumes de données (big data) et l’intelligence artificielle ouvre de nouveaux horizons, et cela également dans le domaine de la sécurité publique. De plus en plus de villes dans le monde entier y ont recours et installent des caméras à reconnaissance faciale. Tout le monde n’est pas d’accord avec cette pratique. Comment peut-on discuter avec les jeunes du débat social actuel sur la sécurité publique et la vie privée ?
Soil degradation due to erosion is a significant worldwide problem at different spatial (from pedon to watershed) and temporal scales. All stages and factors in the erosion process must be detected and evaluated to reduce this environmental issue and protect existing fertile soils and natural ecosystems. Laboratory studies using rainfall simulators allow single factors and interactive effects to be investigated under controlled conditions during extreme rainfall events. In this study, three main factors (rainfall intensity, inclination, and rainfall duration) were assessed to obtain empirical data for modeling water erosion during single rainfall events. Each factor was divided into three levels (− 1, 0, + 1), which were applied in different combinations using a rainfall simulator on beds (6 × 1 m) filled with soil from a study plot located in the arid Sistan region, Iran. The rainfall duration levels tested were 3, 5, and 7 min, the rainfall intensity levels were 30, 60, and 90 mm/h, and the inclination levels were 5, 15, and 25%. The results showed that the highest rainfall intensity tested (90 mm/h) for the longest duration (7 min) caused the highest runoff (62 mm3/s) and soil loss (1580 g/m2/h). Based on the empirical results, a quadratic function was the best mathematical model (R2 = 0.90) for predicting runoff (Q) and soil loss. Single-factor analysis revealed that rainfall intensity was more influential for runoff production than changes in time and inclination, while rainfall duration was the most influential single factor for soil loss. Modeling and three-dimensional depictions of the data revealed that sediment production was high and runoff production lower at the beginning of the experiment, but this trend was reversed over time as the soil became saturated. These results indicate that avoiding the initial stage of erosion is critical, so all soil protection measures should be taken to reduce the impact at this stage. The final stages of erosion appeared too complicated to be modeled, because different factors showed differing effects on erosion.
Designing a Randomized Trial with an Age Simulation Suit—Representing People with Health Impairments
(2020)
Due to demographic change, there is an increasing demand for professional care services, whereby this demand cannot be met by available caregivers. To enable adequate care by relieving informal and formal care, the independence of people with chronic diseases has to be preserved for as long as possible. Assistance approaches can be used that support promoting physical activity, which is a main predictor of independence. One challenge is to design and test such approaches without affecting the people in focus. In this paper, we propose a design for a randomized trial to enable the use of an age simulation suit to generate reference data of people with health impairments with young and healthy participants. Therefore, we focus on situations of increased physical activity.
Phylogeographic analyses point to long-term survival on the spot in micro-endemic Lycian salamanders
(2020)
Lycian salamanders (genus Lyciasalamandra) constitute an exceptional case of microendemism of an amphibian species on the Asian Minor mainland. These viviparous salamanders are confined to karstic limestone formations along the southern Anatolian coast and some islands. We here study the genetic differentiation within and among 118 populations of all seven Lyciasalamandra species across the entire genus’ distribution. Based on circa 900 base pairs of fragments of the mitochondrial 16SrDNA and ATPase genes, we analysed the spatial haplotype distribution as well as the genetic structure and demographic history of populations. We used 253 geo-referenced populations and CHELSA climate data to infer species distribution models which we projected on climatic conditions of the Last Glacial Maximum (LGM). Within all but one species, distinct phyloclades were identified, which only in parts matched current taxonomy. Most haplotypes (78%) were private to single populations. Sometimes population genetic parameters showed contradicting results, although in several cases they indicated recent population expansion of phyloclades. Climatic suitability of localities currently inhabited by salamanders was significantly lower during the LGM compared to recent climate. All data indicated a strong degree of isolation among Lyciasalamandra populations, even within phyloclades. Given the sometimes high degree of haplotype differentiation between adjacent populations, they must have survived periods of deteriorated climates during the Quaternary on the spot. However, the alternative explanation of male biased dispersal combined with a pronounced female philopatry can only be excluded if independent nuclear data confirm this result.
This work studies typical mathematical challenges occurring in the modeling and simulation of manufacturing processes of paper or industrial textiles. In particular, we consider three topics: approximate models for the motion of small inertial particles in an incompressible Newtonian fluid, effective macroscopic approximations for a dilute particle suspension contained in a bounded domain accounting for a non-uniform particle distribution and particle inertia, and possibilities for a reduction of computational cost in the simulations of slender elastic fibers moving in a turbulent fluid flow.
We consider the full particle-fluid interface problem given in terms of the Navier-Stokes equations coupled to momentum equations of a small rigid body. By choosing an appropriate asymptotic scaling for the particle-fluid density ratio and using an asymptotic expansion for the solution components, we derive approximations of the original interface problem. The approximate systems differ according to the chosen scaling of the density ratio in their physical behavior allowing the characterization of different inertial regimes.
We extend the asymptotic approach to the case of many particles suspended in a Newtonian fluid. Under specific assumptions for the combination of particle size and particle number, we derive asymptotic approximations of this system. The approximate systems describe the particle motion which allows to use a mean field approach in order to formulate the continuity equation for the particle probability density function. The coupling of the latter with the approximation for the fluid momentum equation then reveals a macroscopic suspension description which accounts for non-uniform particle distributions in space and for small particle inertia.
A slender fiber in a turbulent air flow can be modeled as a stochastic inextensible one-dimensionally parametrized Kirchhoff beam, i.e., by a stochastic partial differential algebraic equation. Its simulations involve the solution of large non-linear systems of equations by Newton's method. In order to decrease the computational time, we explore different methods for the estimation of the solution. Additionally, we apply smoothing techniques to the Wiener Process in order to regularize the stochastic force driving the fiber, exploring their respective impact on the solution and performance. We also explore the applicability of the Wiener chaos expansion as a solution technique for the simulation of the fiber dynamics.
This study investigated correlative, factorial, and structural relationships between scores for ability emotional intelligence in the workplace (measured with the Geneva Emotional Competence Test), as well as fluid and crystallized abilities (measured with the Intelligence Structure Battery), carried out by a 188-participant student sample. Confirming existing research, recognition, understanding, and management of emotions were related primarily to crystallized ability tests measuring general knowledge, verbal fluency, and knowledge of word meaning. Meanwhile, emotion regulation was the least correlated with any other cognitive or emotional ability. In line with research on the trainability of emotional intelligence, these results may support the notion that emotional abilities are subject to acquired knowledge, where situational (i.e., workplace-specific) emotional intelligence may depend on accumulating relevant experiences.
Roof and wall slates are fine-grained rocks with slaty cleavage, and it is often difficult to determine their mineral composition. A new norm mineral calculation called slatecalculation allows the determination of a virtual mineral composition based on full chemical analysis, including the amounts of carbon dioxide (CO2), carbon (C), and sulfur (S). Derived norm minerals include feldspars, carbonates, micas, hydro-micas, chlorites, ore-minerals, and quartz. The mineral components of the slate are assessed with superior accuracy compared to the petrographic analysis based on the European Standard EN 12326. The inevitable methodical inaccuracies in the calculations are limited and transparent. In the present paper, slates, shales, and phyllites from worldwide occurrences were examined. This also gives an overview of the rocks used for discontinuous roofing and external cladding.
Chronische primäre Schmerzen im Kindes- und Jugendalter sind weit verbreitet. Das Risiko für die Chronifizierung von kindlichen Schmerzen erhöht sich, wenn die Eltern selbst unter chronischen Schmerzen leiden. Elterliche kognitiv-affektive und verhaltensbezogene Reaktionen auf die kindlichen Schmerzen spielen eine zentrale Rolle in der Chronifizierung und familialen Transmission der Schmerzen. Welche spezifischen Faktoren die elterlichen Reaktionen auf die kindlichen Schmerzen modulieren, ist bis dato allerdings unklar. Ziel der vorliegenden Dissertation ist daher die Analyse des elterlichen schmerzbezogenen Verhaltens (maladaptive Reaktionen wie Katastrophisieren und Zuwendung) hinsichtlich möglicher modulierender Faktoren sowohl auf Eltern- (top-down-Variablen) als auch auf Kindebene (bottom-up-Variablen). Dafür wurden differenzierende Stichproben generiert und mit Hilfe von validierten Fragebögen befragt. In Studie 1 wurde eine Stichprobe von N = 105 schmerzfreien Elternteilen aus der Allgemeinbevölkerung und N = 80 Elternteilen aus der Allgemeinbevölkerung mit selbstberichteten chronischen Schmerzen erhoben. Die Stichprobe von Studie 2 umfasste N = 118 Elternteile mit chronischen Schmerzen, Angstsymptomen oder beidem sowie deren N = 190 Kinder, in Studie 3 wurden N = 63 Mütter, Väter und Kinder (Eltern-Kind-Triaden mit jeweils N = 21 Müttern, Vätern und Kindern mit der Diagnose einer chronischen Schmerzstörung) befragt. Nach der Überprüfung der Einsetzbarkeit der zentralen Erhebungsinstrumente auch in nicht-klinischen Samples wurden in Studie 1 die Reaktionen von schmerzfreien Eltern und Eltern mit selbstberichteten chronischen Schmerzen auf die Schmerzen ihrer Kinder mit anderen Stichproben sowie untereinander verglichen. Die Analyse der Einflüsse von top-down- und bottom-up-Variablen (elterliche und kindliche Schmerz- und Angstsymptomatik, elterliche und kindliche Somatisierung bzw. schmerzbezogene Beeinträchtigung sowie Alter und Geschlecht von Eltern und Kindern) auf die elterlichen
maladaptiven Reaktionen wurde in Studie 2 und Studie 3 mit Hilfe von hierarchisch linearen Modellen durchgeführt. Die Ergebnisse zeigen, dass Eltern von Kindern mit chronischen
Schmerzen grundsätzlich stärker katastrophisierten als Eltern von gesunden Kindern. Außerdem zeigte sich, dass insbesondere top-down-Variablen wie elterliche Angst das Katastrophisieren und die Zuwendung der Eltern verstärken. Bottom-up-Variablen erwiesen sich ausschließlich in der Interaktion von kindlicher Schmerz- und Angstsymptomatik als verstärkender Faktor für die Katastrophisierungsneigung der Eltern. Demnach scheinen zentrale modulierende Faktoren für kognitiv-affektive und verhaltensbezogene elterliche Reaktionen im Kontext der Chronifizierung von kindlichen chronischen Schmerzen vor allem top-down-Variabeln wie die elterliche Katastrophisierungsneigung und Angstsymptomatik zu sein. Als potentielle Risikogruppen für die Entwicklung von chronischen Schmerzen lassen sich so neben Kindern von Eltern mit eigenen chronischen Schmerzen auch Kinder von Eltern mit Angststörungen und erhöhter Katastrophisierungsneigung benennen. Daher sollte die Elternrolle in Therapien von Erwachsenen eine ausreichende Berücksichtigung finden, um eine Reduktion der maladaptiven Reaktionen auf die Kinder zu erreichen und so einer Entwicklung von chronischen Schmerzen vorzubeugen. Auch die psychoedukative Einbindung der Eltern in die kindliche Schmerztherapie erscheint aufgrund der vorliegenden Ergebnisse unabdingbar, vor allem wenn die Kinder neben den chronischen Schmerzen auch unter komorbiden psychischen Störungen wie beispielsweise Angststörungen leiden.
The nonhydrostatic regional climate model CCLM was used for a long-term hindcast run (2002–2016) for the Weddell Sea region with resolutions of 15 and 5 km and two different turbulence parametrizations. CCLM was nested in ERA-Interim data and used in forecast mode (suite of consecutive 30 h long simulations with 6 h spin-up). We prescribed the sea ice concentration from satellite data and used a thermodynamic sea ice model. The performance of the model was evaluated in terms of temperature and wind using data from Antarctic stations, automatic weather stations (AWSs), an operational forecast model and reanalyses data, and lidar wind profiles. For the reference run we found a warm bias for the near-surface temperature over the Antarctic Plateau. This bias was removed in the second run by adjusting the turbulence parametrization, which results in a more realistic representation of the surface inversion over the plateau but resulted in a negative bias for some coastal regions. A comparison with measurements over the sea ice of the Weddell Sea by three AWS buoys for 1 year showed small biases for temperature around ±1 K and for wind speed of 1 m s−1. Comparisons of radio soundings showed a model bias around 0 and a RMSE of 1–2 K for temperature and 3–4 m s−1 for wind speed. The comparison of CCLM simulations at resolutions down to 1 km with wind data from Doppler lidar measurements during December 2015 and January 2016 yielded almost no bias in wind speed and a RMSE of ca. 2 m s−1. Overall CCLM shows a good representation of temperature and wind for the Weddell Sea region. Based on these encouraging results, CCLM at high resolution will be used for the investigation of the regional climate in the Antarctic and atmosphere–ice–ocean interactions processes in a forthcoming study.