Wave propagation simulation on a 3D model of the Ruhr district for locations of seismic monitoring.

<p>The Ruhr district meets the necessary elements to carry out geothermal projects due to its geothermal potential and demand, as it is a densely populated industrial area. Currently, there are projects for direct use, whereas projects for electricity generation are planned. The latter, due to greater depths, reservoir enhancement techniques are required in some cases. This may increase the associated seismic risk which should be elaborated in detail.</p><p>With available data, a three-dimensional geological and structural model was created. The shallower parts have been widely studied and documented by mining activity in the Ruhr region during the last century.  Below a depth of 1 km, data are scarce, and uncertainties increase. The full elastic wavefield emitted by a realistic seismic source has been simulated using a finite differences scheme and the derived geological model. The elastic properties were estimated with well data. The source has common characteristics of real seismic events in the area.</p><p>The wave propagation simulations let us analyze the seismic response with different sources and velocities models. Three cases are considered, two seismic events with distinct depths based on real events. The third case is based on the proposed location of a deep geothermal project.</p><p>Especially for the case with the deeper source, the areas with relatively high amplitudes of displacement correlated with structural features of the model. Applying the imaging condition of maximum energy density allows us to define zones with a potentially increased seismic risk that should be monitored more closely.</p>

„Da war ich sofort high gewesen, ne. Wein getankt, woll.” – Eine exemplarische Analyse des Dortmunder Regiolekts unter besonderer Berücksichtigung von Rückversicherungspartikeln

Da war ich sofort high gewesen, ne. Wein getankt, woll: An empirically based analysis of the Dortmund area’s regiolect with particular regard to reassurance particlesThis study deals with the German particles ne and woll in the spoken language of the Ruhr district. There are some possibilities in terms of the usage of what we call reassurance particles at the end of somebody’s utterances. In the regiolect of the Ruhr area, the usage of ne is very common, but there are also eastern territories where woll is used as well. We are examining if the usage depends on different sub-regiolects in terms of diatopic variations, and/or it also depends on situational aspects such as different registers or situational speech.

Immersive VR Experience of Redeveloped Post-industrial Sites: The Example of “Zeche Holland” in Bochum-Wattenscheid

Modern hardware and software innovations in the field of virtual reality (VR), such as VR headsets and accessible game engines, allow cartographers to create 3D environments which can be experienced from the ego perspective in real time and with a simulated illusion of physical presence (immersion) in the virtual representation. The new immersive experience of these virtual environments requires new ideas on how to present and orchestrate geographical information for the benefit of planning applications. This paper intends to present examples how VR-based 3D environments use can be enriched (based on the game engine Unreal Engine 4) to support the district development of a restructured post-industrial area. A VR model of a representative former industrial area in the German Ruhr district which was revitalized and part of a large urban transformation programme (IBA Emscher Park), serves an example. Today, the area of “Zeche Holland” in Bochum-Wattenscheid is characterized by a mix of residential and commercial uses. The area is used as a leisure route for locals and tourists, with an old winding tower as an important urban landmark in its centre. VR techniques allow to transport additional spatial information which cannot be experienced when visiting the real physical area. This paper addresses the potential of immersive VR environments representing a multifaceted and redeveloped area for planning and related usage scenarios. It shows how peculiarities of game engine-based VR can help to extend the immersive (3D) experience of geographic information.

Four Key Concepts for Studying Context-based Compositions

This theoretical article investigates context-based compositions where we cannot identify the real-world context from the sounds alone. Examples include Stephen Vitiello’sWorld Trade Center Recordings: Winds After Hurricane Floyd, Jana Winderen’sThe Noisiest Guys on the Planet, Jacob Kirkegaard’s4 Rooms, Christina Kubisch’s compositions based on observations of the Ruhr district, Anne Niemetz and Andrew Pelling’sThe Dark Side of the Cell(2004) as well as Andrea Polli’sHeat and Heartbeat of the City(2004) based on weather data from New York. The article asks how these compositions establish their relation to a specific context. How do they invite the listener to include his or her knowledge of specific contexts? The article suggests four relevant terms that are useful when studying this relation between text and context:paratext,intermediality,enunciationandmediality.