Dokumentarische Interpretation von Kinderzeichnungen: Kinder malen ihre KiTa

Die für diesen Beitrag ausgewählten Kinderzeichnungen von 4- bis 6-jährigen Kindern sind im Rahmen des Forschungs- und Praxisentwicklungsprojekts „Kinder als Akteure der Qualitätsentwicklung in KiTas“ entstanden. Die für das Projekt entwickelte Methode „Kinder malen ihre Kita“ wird mit folgendem Stimulus eingeleitet: „Ich möchte/wir möchten, dass ihr mir/uns mal unsere KiTa malt. Ihr könnt sie so malen, wie ihr denkt! Und ihr könnt mir/uns entweder während ihr malt, etwas zu eurem Bild erzählen oder auch danach, wenn es fertig ist“. Sowohl die Kinderzeichnungen als auch die Gespräche mit den Kindern werden einer Dokumentarischen Interpretation unterzogen. In dem Beitrag werden zum einen anhand von zwei Bildern die Arbeitsschritte der dokumentarischen Bildinterpretation und ihre Spezifität in Bezug auf Kinderzeichnungen detailliert vorgeführt. Zum anderen werden die beiden weiteren Bilder sowie die Gesprächssequenzen auf der Ebene der Komparation bzw. der Relationierung verschiedener Datensorten hinzugezogen. Der Beitrag fokussiert methodologische und methodische Fragen, arbeitet aber auch erste homologe Muster heraus, wie Kinder im Alter von vier bis sechs Jahren ihre KiTa in Bild und Text (re-) konstruieren und mit ihren Erfahrungen und Relevanzen ‚aufladen‘

Enforcing Temporal Consistency in Physically Constrained Flow Field Reconstruction with FlowFit by Use of Virtual Tracer Particles

Processing techniques for particle based optical flow measurement data such as 3D Particle Tracking Velocimetry (PTV) or the novel dense Lagrangian Particle Tracking method Shake-The-Box (STB) can provide time-series of velocity and acceleration information scattered in space. The following post-processing is key to the quality of space-filling velocity and pressure field reconstruction from the scattered particle data. In this work we describe a straight-forward extension of the recently developed data assimilation scheme FlowFit, which applies physical constraints from the Navier-Stokes equations in order to simultaneously determine velocity and pressure fields as solutions to an inverse problem. We propose the use of additional artificial Lagrangian tracers (virtual particles), which are advected between the flow fields at single time instants to achieve meaningful temporal coupling. This is the most natural way of a temporal constraint in the Lagrangian data framework. Not FlowFit's core method is altered in the current work, but its input in form of Lagrangian tracks. This work shows that the introduction of such particle memory to the reconstruction process significantly improves the resulting flow fields. The method is validated in virtual experiments with two independent DNS test cases. Several contributions are revised to explain the improvements, including correlations of velocity and acceleration errors in the reconstructions and the flow field regularization within the inverse problem

Bildungsbotschafterinnen und Bildungsbotschafter in Kita, Schule und Stadtteil

BILDUNGSBOTSCHAFTERINNEN UND BILDUNGSBOTSCHAFTER IN KITA, SCHULE UND STADTTEIL Bildungsbotschafterinnen und Bildungsbotschafter in Kita, Schule und Stadtteil / Gesemann, Frank (Rights reserved) ( -

Evolution of visual guanylyl cyclases and their activating proteins with respect to clade and species-specific visual system adaptation

Membrane guanylyl cyclase receptors are important regulators of local cGMP production, critically influencing cell growth and differentiation as well as ion transport, blood pressure and calcium feedback of vertebrate phototransduction. Currently, seven different subtypes of membrane guanylyl cyclase receptors have been characterized. These receptors have tissue specific expression and are activated either by small extracellular ligands, changing CO$_{2}$ concentrations or, in the case of visual guanylyl cyclases, intracellularly interacting Ca$^{2+}$-dependent activating proteins. In this report, we focus on the visual guanylyl cyclase receptors (GCs) GC-E (gucy2d/e) and GC-F (gucy2f) and their activating proteins (GCAP1/2/3; guca1a/b/c). While gucy2d/e has been detected in all analyzed vertebrates, GC-F receptors are missing in several clades (reptiles, birds, and marsupials) and/or individual species. Interestingly, the absence of GC-F in highly visual sauropsida species with up to 4 different cone-opsins is compensated by an increased number of guanylyl cyclase activating proteins, whereas in nocturnal or visually impaired species with reduced spectral sensitivity it is consolidated by the parallel inactivation of these activators. In mammals, the presence of GC-E and GC-F is accompanied by the expression of one to three GCAPs, whereas in lizards and birds, up to five different GCAPs are regulating the activity of the single GC-E visual membrane receptor. In several nearly blind species, a single GC-E enzyme is often accompanied by a single variant of GCAP, suggesting that one cyclase and one activating protein are both sufficient and required for conferring the basic detection of light

Spatially moving boundary conditions for FlowFit using the Augmented Lagrangian method

In order to support Aeroelastics and Fluid-Structure Interaction studies we intend to improve on how the data assimilation method FlowFit deals with possibly moving boundaries such as walls and other objects. FlowFit takes scattered velocity and acceleration estimates from a particle tracking method such as the STB and estimates the full velocity and pressure fields. Internally, FlowFit represents the flow fields using a uniform rectangular grid of base splines. This type of grid has several benefits which include a fast FFT-based Poisson solver for pressure and fast computation of several quantities due to the separability of the filter kernels. But it also complicates the introduction of possibly curved walls. Until now, we have converted wall constraints into a set of “wall particles” covering the wall’s surface with vanishing velocities for the no-slip condition. These constraints were not enforced exactly but only approximately by minimizing the squared error as part of the cost function (penalty method). In this work we present some preliminary results of an investigation on the use of the Augmented Lagrangian method for enforcing the no-slip constraints more accurately within the FlowFit data assimilation method. A 2D implementation of FlowFit was adapted for the purpose of testing different surface sampling strategies with respect to its effect on the velocity field reconstruction

Selective Gene Loss of Visual and Olfactory Guanylyl Cyclase Genes Following the Two Rounds of Vertebrate-Specific Whole-Genome Duplications

Photoreceptors convey visual information and come in two flavors; dim-light and bright-light dedicated rod and cones. Both cell types feature highly specialized phototransduction cascades that convert photonic energy into intracellular signals. Although a substantial amount of phototransduction gene ohnologs are expressed either in rods or cones, visual guanylyl cyclases (GCs) involved in the calcium (Ca2+) dependent feedback regulation of phototransduction are neither rod nor cone specific. The co-existence of visual GCs in both photoreceptor types suggests that specialization of these ohnologs occurred despite their overlapping expression. Here, we analyze gene retention and inactivation patterns of vertebrate visual and closely related olfactory GCs following two rounds (2R) of vertebrate-specific whole-genome duplication events (2R WGD). Although eutherians generally use two visual and one olfactory GC, independent inactivation occurred in some lineages. Sauropsids (birds, lizards, snakes, turtles, and crocodiles) generally have only one visual GC (GC-E). Additionally, turtles (testodes) also lost the olfactory GC (GC-D). Pseudogenization in mammals occurred in specific species/families likely according to functional needs (i.e., many species with reduced vision only have GC-E). Likewise, some species not relying on scent marks lack GC-D, the olfactory GC enzyme. Interestingly, in the case of fish, no species can be found with fewer than three (two visual and one olfactory) genes and the teleost-specific 3R WGD can increase this number to up to five. This suggests that vision in fish now requires at least two visual GCs

FlowFit3: Fast Data Assimilation for Recovering Instantaneous Details of Incompressible Flows based on scattered data

This works presents an evolution of the FlowFit method for reconstructing incompressible flow fields (specifically velocity and pressure) based on scattered velocity and acceleration data. It can thus be used to process the data obtained from Lagrangian Particle Tracking (LPT) in order to recover structures of fluid motion. The goal of this development was to improve both accuracy and speed over its predecessor so this method can be used in experiments with large measurement domains and/or a high number of seeding particles. The method will be explained and assessed in comparison with its predecessor using synthetic data derived from fluid simulations

Die Romankunst Ivan Vazovs

In der Reihe Slavistische Beiträge werden vor allem slavistische Dissertationen des deutschsprachigen Raums sowie vereinzelt auch amerikanische, englische und russische publiziert. Darüber hinaus stellt die Reihe ein Forum für Sammelbände und Monographien etablierter Wissenschafter/innen dar.</P