Levumi, Malini und das verhexte Dorf. Leseabenteuer See

Die Onlineplattform Levumi bietet vier adaptive Förderkonzepte unter dem Titel „Levumis Leseabenteuer“ zur Steigerung der Leseflüssigkeit und des basalen Leseverständnisses in der Grundschule an. In dem vorliegenden Dokument befinden sich alle Vorbereitungs- und Unterrichtsmarialien zum Leseabenteuer „Levumi, Malini und das verhexte Dorf“. Die fachliche Einleitung sowie ein Überblick zu den anderen drei Leseabenteuern ist unter http://dx.doi.org/10.17877/DE290R-20992 zu finden und kann dort k...

Theoriegeleitete Lernverlaufsdiagnostik zur Erfassung von basalen Lesekompetenzen in der inklusiven Grundschule – Entwicklung, Evaluation und Implementation von webbasierten Testverfahren See

In Deutschland erwerben aktuell knapp 20% Grundschülerinnen und Grundschüler unzureichende Lesekompetenzen, sodass das Lernen in der Sekundarstufe beeinträchtigt wird. Forschende fordern für Schülerinnen und Schüler mit einem Risiko zur Ausbildung von Leseschwierigkeiten eine präventive Leseförderung, die an individuellen Lernbedürfnissen ansetzt. Ein möglicher Ansatz ist die Lernverlaufsdiagnostik (LVD). Allerdings stehen für den deutschen Grundschulleseunterricht reliable Lernverlaufstests ...

Validation and evaluation of the strengths and difficulties questionnaire in the German school system: an examination of regular and inclusive classrooms See

This dissertation examines the Strengths and Difficulties Questionnaire (SDQ) in German classrooms. In doing so, the factor structure of the SDQ was found sufficiently similar to established 5- and 3- factor models. In the three included articles, longitudinal changes in SDQ performance are examined, and the SDQ is connected to student performance (i.e., grades and competency) and the Perception of Inclusion Questionnaire (PIQ). This establishes not only a validation of the structure of the S...

The stabilizing influence of radiofrequency phase modulation counteracting coupled-bunch instabilities See

Synchrotron radiation sources have become an essential part of modern science. The ongoing development to reach higher performance levels with improved quality of synchrotron light demands upgrades of current synchrotron radiation facilities or even construction of new accelerators. During this process, new challenges, both technological and in the accelerator physics, need to be addressed to achieve a higher light quality in terms of brightness, coherence, pulse duration, etc. This includes ...

Tätigkeitsbericht 2019 See

Activity Report 2019 See

Optimal photon energies for initialization of hybrid spin quantum registers of NV centers in diamond See

Initializing quantum registers with high fidelity is a fundamental precondition for many applications like quantum information processing and sensing. The electronic and nuclear spins of a Nitrogen-Vacancy (NV) center in diamond form an interesting hybrid quantum register that can be initialized by a combination of laser, microwave, and radio-frequency pulses. However, the laser illumination, which is necessary for achieving electron spin polarization, also has the unwanted side-effect of dep...

Adaptive Leseförderung zur Steigerung der Leseflüssigkeit und des basalen Leseverständnisses „Levumis Leseabenteuer“ See

Die Onlineplattform Levumi bietet vorrangig Tests zur Lernverlaufsdiagnostik in den Lernbereichen Lesen, Rechtschreiben, Mathematik und dem Bereich Verhalten und Empfinden an (Jungjohann, Diehl, Mühling & Gebhardt, 2018). Im Lernbereich Lesen kann die Entwicklung der Leseflüssigkeit sowie des basalen Leseverständnisses beobachtet werden (Jungjohann, Mau, Diehl & Gebhardt, 2019). Als Ergänzung werden zur Förderung vier adaptive Förderkonzepte unter dem Titel „Levumis Leseabenteuer“ zur Steiger...

On the threshold condition for Dörfler marking See

It is an open question if the threshold condition θ < θ_* for the Dörfler marking parameter is necessary to obtain optimal algebraic rates of adaptive finite element methods. We present a (non-PDE) example fitting into the common abstract convergence framework (axioms of adaptivity) and which is potentially converging with exponential rates. However, for Dörfler marking θ > θ_* the algebraic converges rate can be made arbitrarily small.

Optimal control of perfect plasticity Part II: Displacement tracking See

The paper is concerned with an optimal control problem governed by the rate-independent system of quasi-static perfect elasto-plasticity. The objective is optimize the displacement field in the domain occupied by the body by means of prescribed Dirichlet boundary data, which serve as control variables. The arising optimization problem is nonsmooth for several reasons, in particular, since the control-to-state mapping is not single-valued. We therefore apply a Yosida regularization to obtain a ...

Strong Stationarity for Optimal Control of Variational Inequalities of the Second Kind See

This paper is concerned with necessary optimality conditions for optimal control problems governed by variational inequalities of the second kind. So-called strong stationarity conditions are derived in an abstract framework. Strong stationarity conditions are regarded as the most rigorous ones, since they imply all other types of stationarity concepts and are equivalent to purely primal optimality conditions. The abstract framework is afterwards applied to four application-driven exa...

Micro-computed tomography for the investigation of stationary liquid/liquid and liquid/gas interfaces in capillaries See

For better understanding and optimization of multiphase flow in miniaturized devices, micro‐computed tomography (μCT) is a promising visualization tool, as it is nondestructive, three‐dimensional, and offers a high spatial resolution. Today, computed tomography (CT) is a standard imaging technique. However, using CT in microfluidics is still challenging, since X‐ray related artifacts, low phase contrast, and limited spatial resolution complicate the exact localization of interfaces. We apply ...

Urban Factories – Establishing resource-efficiency in production logistics systems in cities See

Cities are a hotspot for resource consumption and related impacts. This is induced, among others, by transportation, production and the use of products and services. Industrial production is commonly associated with negative impacts, e.g. on the environment or traffic. Through positive integration of production sites into urban surroundings, negative impacts can be eliminated, and even positive impacts achieved. To reach a higher degree of integration of different u...

Tailored transition-metal coordination environments in imidazole-modified DNA G-quadruplexes See

Two types of imidazole ligands were introduced both at the end of tetramolecular and into the loop region of unimolecular DNA G‐quadruplexes. The modified oligonucleotides were shown to complex a range of different transition‐metal cations including NiII, CuII, ZnII and CoII, as indicated by UV/Vis absorption spectroscopy and ion mobility mass spectrometry. Molecular dynamics simulations were performed to obtain structural insight into the investigated systems. Variation of ligand number and ...

Entwicklung einer intramolekularen Alkin-(Aza-)de Mayo Reaktion: Aufbau und Modifikation von Cyclohepta-, Cyclooctadienonen und Cyclohepta[b]indolen See

Die vorliegende Dissertation beschäftigt sich mit der Entwicklung einer intramolekularen Alkin-(Aza-)de Mayo Reaktion, die zur Synthese von mittelgroßen anellierten cyclischen Dienonen genutzt werden kann. Als Ausgangsmaterial dienen einfach zugängliche Alkinyl-substituierte vinyloge (Thio-)Ester bzw. Imide. Entscheidend für die erfolgreiche Durchführung dieser photochemischen Reaktion ist die Verwendung einer quasi-monochromatischen Lichtquelle zur Bestrahlung. Des Weiteren begünstigt der Ei...

Robustness and variation of low-dimensional signal transmission in topological phases See

This thesis investigates the variation of signal transmission in topological phases as well as their robustness in one- and two-dimensional systems. For this purpose, multiple approaches in different systems are pursued. First, the possibility of designed modifications at the boundaries is explored in order to change the Fermi velocity at edge states of topological phases. The Fermi velocity as a quantity of the transport behavior describes the speed of signal transmission. The main ide...

Quasi-optimal and pressure robust discretizations of the stokes equations by moment- and divergence-preserving operators See

We approximate the solution of the Stokes equations by a new quasi-optimal and pressure robust discontinuous Galerkin discretization of arbitrary order. This means quasi-optimality of the velocity error independent of the pressure. Moreover, the discretization is well-defined for any load which is admissible for the continuous problem and it also provides classical quasioptimal estimates for the sum of velocity and pressure errors. The key design principle is a careful discretization of the l...

Sustainable gold catalysis in water using cyclodextrin-tagged NHC-gold complexes See

The synthesis of 10 water‐soluble β‐cyclodextrin‐tagged NHC‐gold(I) complexes is described. Key steps are nucleophilic substitutions, as well as, copper‐(CuAAC)‐ and ruthenium‐(RuAAC)‐catalyzed azide alkyne cycloadditions. Whereas the CuAAC reliably affords 1,4‐disubstituted 1,2,3‐triazoles, the regioselectivity of the RuAAC depends on the structure of the coupling partners. Permethylated cyclodextrin‐tagged NHC‐gold(I) complexes are soluble both in water and in organic solvents. They show ex...

Load optimisation for air bending in the context of damage reduction See

Load optimisation applied to air bending is used to optimise the damage state in the formed component. In [1], elastomer bending is presented, where superposed stresses due to the reaction forces of the elastomer cushion lead to reduced damage growth. Replacing the elastomer cushion with compressive loads allows for optimisation of these loads such that the damage, estimated with the stress triaxiality, is reduced. The optimisation is accomplished with the commercial FEM‐Software Abaqus as th...