Heterotopien: Kindliche Raumwahrnehmung als produktive Kategorie der Architektur- und Kunstgeschichte

1\. Auflag

„Im Straßenbild wirkungsvoll“. Kirchenbauten in der Stadt Hamburg vom Mittelalter bis 1965

Bis zur Aufhebung der Torsperre im Jahr 1860 war Hamburg ein recht kompakter, in sich geschlossener städtebaulicher Organismus. Dessen Entwicklung lässt sich bis heute eindrucksvoll an seinen Kirchenbauten nachvollziehen. Noch im 19. Jahrhunderts hatten die Kirchen zunächst große Gemeinden zu versorgen und mussten daher von weither sichtbar sein. „Sehlinien“ sollten ähnlich der städtischen Situation im Mittelpunkt der Architektenplanung stehen. In den Jahren 1945 bis 1961, in denen die meisten Hamburger Kirchen errichtet worden sind, waren neben dem Landeskirchenamt auch die städtischen Behörden an der Planung beteiligt. Die Entscheidung über Abriss oder Umnutzung und Umbau von Kirchenbauten darf daher, so die These, nicht den Kirchen selbst überlassen werden. Kirchen und ihre Ausstattung müssen in ihrer städtebaulichen und architekturhistorischen Bedeutung für Hamburg analysiert und öffentlich diskutiert werden

Efficient generation and optimization of stochastic template banks by a neighboring cell algorithm

Placing signal templates (grid points) as efficiently as possible to cover a multi-dimensional parameter space is crucial in computing-intensive matched-filtering searches for gravitational waves, but also in similar searches in other fields of astronomy. To generate efficient coverings of arbitrary parameter spaces, stochastic template banks have been advocated, where templates are placed at random while rejecting those too close to others. However, in this simple scheme, for each new random point its distance to every template in the existing bank is computed. This rapidly increasing number of distance computations can render the acceptance of new templates computationally prohibitive, particularly for wide parameter spaces or in large dimensions. This work presents a neighboring cell algorithm that can dramatically improve the efficiency of constructing a stochastic template bank. By dividing the parameter space into sub-volumes (cells), for an arbitrary point an efficient hashing technique is exploited to obtain the index of its enclosing cell along with the parameters of its neighboring templates. Hence only distances to these neighboring templates in the bank are computed, massively lowering the overall computing cost, as demonstrated in simple examples. Furthermore, we propose a novel method based on this technique to increase the fraction of covered parameter space solely by directed template shifts, without adding any templates. As is demonstrated in examples, this method can be highly effective..Comment: PRD accepte

Reducing the number of templates for aligned-spin compact binary coalescence gravitational wave searches using metric-agnostic template nudging

Efficient multi-dimensional template placement is crucial in computationally intensive matched-filtering searches for Gravitational Waves (GWs). Here, we implement the Neighboring Cell Algorithm (NCA) to improve the detection volume of an existing Compact Binary Coalescence (CBC) template bank. This algorithm has already been successfully applied for a binary millisecond pulsar search in data from the Fermi satellite. It repositions templates from over-dense regions to under-dense regions and reduces the number of templates that would have been required by a stochastic method to achieve the same detection volume. Our method is readily generalizable to other CBC parameter spaces. Here we apply this method to the aligned--single-spin neutron-star--black-hole binary coalescence inspiral-merger-ringdown gravitational wave parameter space. We show that the template nudging algorithm can attain the equivalent effectualness of the stochastic method with 12% fewer templates

Atomic Fermi gas in the trimerized Kagom\'e lattice at the filling 2/3

We study low temperature properties of an atomic spinless interacting Fermi gas in the trimerized Kagom\'e lattice for the case of two fermions per trimer. The system is described by a quantum spin 1/2 model on the triangular lattice with couplings depending on bonds directions. Using exact diagonalizations we show that the system exhibits non-standard properties of a {\it quantum spin-liquid crystal}, combining a planar antiferromagnetic order with an exceptionally large number of low energy excitations.Comment: 4 pages & 4 figures + 2 tables, better version of Fig.

Who, What, Why, Where and How? - Youth Councils in Foundations

This report aims to show German funding organizations the positive effects of children and young people's active participation in grant-making decisions, and encourage the organizations to establish their own youth councils or take other steps to enable participation. In order to make this as easy as possible for the organizations, we set out quality criteria and success factors and suggest first steps that can be taken. Three of the programs run by German foundations that are profiled are covered in depth. By making youth councils and youth participation more widespread, the democratic process is strengthened and the legal rights of young people anchored in reality

Mechanistic insights into the oxidative dehydrogenation of amines to nitriles in continuous flow

Mechanistic investigations including in situ infrared spectroscopy and Hammett investigations of the oxidative dehydrogenation of amine compounds using RuO2/Al2O3 catalysts.</p