I construct a spherically symmetric solution for a massless real scalar field minimally
coupled to general relativity which is discretely self-similar (DSS) and regular. This solution …

We study the power-law tails in the evolution of massless fields around a fixed background
geometry corresponding to a black hole. We give analytical arguments for their existence at …

As first discovered by Choptuik, the black hole threshold in the space of initial data for general
relativity shows both surprising structure and surprising simplicity. Universality, power-law …

We show that by adding suitable lower-order terms to the Z4 formulation of the Einstein
equations, all constraint violations except constant modes are damped. This makes the Z4 …

Die Entwicklung und Durchsetzung von Innovationen im Markt ist zu einem entscheidenden
Faktor geworden, der die Agenda von Managern immer stärker bestimmt. Dass eine …

During plastic deformation of metals and alloys, dislocations arrange in ordered patterns.
How and when these self-organization processes take place have remained elusive, because …

We compare the predictions of linearized theory for the radiation produced in the collapse of
a spherically symmetric scalar field with a full numerical integration of the Einstein equations…

We summarize exploratory work on multigrain crystallography. The experimental arrangement
comprises a monochromatic beam, a fully illuminated sample with up to several hundred …

By fine-tuning generic Cauchy data, critical phenomena have recently been discovered in
the black-hole/no-black-hole “phase transition” of various gravitating systems. For the …

This study demonstrates a two-step approach that enables quantification of concrete printability
through dynamics mode rheological measurements; I) modeling shearing history during …