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Exhibition Opening of Ancient Cast Collection at Freie Universität Berlin on May 11, 2017 BERLIN, 12-May-2017 — /EuropaWire/ — An exhibition of sculptures in an architectural context will open on May 11, 2017, in the Cast Collection of Ancient Sculptures. Using casts of ancient sculptures and reconstructions of individual spatial constructions in images, five examples show how sculptures were integrated in their respective architectural context in antiquity. As part of the exhibition, there is a short film illustrating the possibilities of a 3D visualization of the ancient city of Pergamon, in which individual sculptures were scanned. The exhibition will be on display from May 12 through July 2, 2017, during the regular opening hours of the cast collection. Both the exhibition and the exhibition opening are public, and admission is free. “Greek and Roman sculptures were components of religious, political, and other social practices,” says Prof. Dr. Lorenz Winkler-Horaček from the Institute of Classical Archaeology at Freie Universität Berlin, who organized the exhibition. They belonged to the furnishing of temples, outdoor plazas, villas, and palaces, among various other functions. The sculptures formed a unity with the surrounding architecture, which they influenced, while also being influenced by the surrounding buildings. This spatial connection has largely disappeared. “Nowadays, we usually view these sculptures in museums and travel separately to the locations where they stood,” says Lorenz Winkler-Horaček. The 3D visualization of the city of Pergamon was developed by scholars at the Brandenburg University of Technology in Cottbus (today Cottbus-Senftenberg) under the direction of Dominik Lengyel and Catherine Toulouse in cooperation with the German Archaeological Institute, Istanbul Division, within a project sponsored from 2009 to 2012 by the German Federal Ministry of Education and Research. The project was called “The Berlin Sculpture Network – Contextualization and Translation of Ancient Sculptures.” 3D scans of selected statues in Pergamon were integrated into a model of the city. “3D visualization is a multifunctional research tool that allows the viewer to assume different points of view within the city, and to draw conclusions about the spatial interplay of sculpture and architecture,” says Dominik Lengyel. Using this tool it is possible to visually implement and test research findings about the placement of statues. Other participants were the Karlsruhe University of Applied Science and the Ancient Collections of the Staatliche Museen zu Berlin.

Herzog T.H.,Wildau University of Applied Sciences | Janchen J.,Wildau University of Applied Sciences | Kontogeorgopoulos E.M.,InvenSor GmbH | Lutz W.,Brandenburg University of Technology
Energy Procedia | Year: 2014

The influence of the dealumination degree of NaY with respect to the water adsorption properties was investigated by infrared spectroscopy, thermogravimetry and isotherm measurements. The modification of the samples is a result of a steaming process at different temperatures in dependence of time. It was found that dealumination controls the hydrophilic behavior of NaY and contributes to defined low desorption temperatures. Similar to microporous SAPO's steamed Y-zeolites can be used for low temperature applications of heat transformation and thermal adsorption storage.

Frossard A.,Eawag - Swiss Federal Institute of Aquatic Science and Technology | Frossard A.,ETH Zurich | Frossard A.,Leibniz Institute of Freshwater Ecology and Inland Fisheries | Gerull L.,Brandenburg University of Technology | And 5 more authors.
Applied and Environmental Microbiology | Year: 2013

Succession of newly created landscapes induces profound changes in plant litter supplied to streams. Grasses dominate inputs into open-land streams, whereas tree litter is predominant in forested streams. We set out to elucidate whether the activity and structure of microbial communities on decomposing leaves are determined by litter quality (i.e., grass or tree leaves colonized) or whether changes during riparian succession affecting litter standing stocks on the stream bed play an overriding role. We used 15 outdoor experimental streams to simulate changes in litter supplies reflecting five stages of riparian succession: (i) a biofilm stage with no litter, (ii) an open-land stage characterized by grass litter inputs, (iii) a transitional stage with a mix of grass and tree litter, (iv) an early forested stage with tree litter, and (v) an advanced forested stage with 2.5 times the amount of tree litter. Microbial activities on tree (Betula pendula) and grass (Calamagrostis epigejos) litter were unaffected by either the quantity or type of litter supplied to the experimental streams (i.e., litter standing stock) but differed between the two litter types. This was in stark contrast with bacterial and fungal community structure, which markedly differed on grass and tree litter and, to a lesser extent, also among streams receiving different litter inputs. These patterns reveal distinct responses of microbial community structure and activity to the bulk litter available in streams but consistent responses to the litter type colonized. © 2013, American Society for Microbiology.

Beirow B.,Brandenburg University of Technology | Giersch T.,Brandenburg University of Technology | Kuhhorn A.,Brandenburg University of Technology | Nipkau J.,Rolls-Royce
Journal of Engineering for Gas Turbines and Power | Year: 2015

The forced response of the first rotor of an engine 3E (technology program) (E3E)-type high pressure compressor (HPC) blisk is analyzed with regard to varying mistuning, varying engine order (EO) excitations and the consideration of aero-elastic effects. For that purpose, subset of nominal system modes (SNM)-based reduced order models are used in which the disk remains unchanged while the Young's modulus of each blade is used to define experimentally adjusted as well as intentional mistuning patterns. The aerodynamic influence coefficient (AIC) technique is employed to model aero-elastic interactions. Furthermore, based on optimization analyses and depending on the exciting EO and aerodynamic influences it is searched for the worst as well as the best mistuning distributions with respect to the maximum blade displacement. Genetic algorithms using blade stiffness variations as vector of design variables and the maximum blade displacement as objective function are applied. An allowed limit of the blades' Young's modulus standard deviation is formulated as secondary condition. In particular, the question is addressed if and how far the aero-elastic impact, mainly causing aerodynamic damping, combined with mistuning can even yield a reduction of the forced response compared to the ideally tuned blisk. It is shown that the strong dependence of the aerodynamic damping on the interblade phase angle is the main driver for a possible response attenuation considering the fundamental blade mode. The results of the optimization analyses are compared to the forced response due to real, experimentally determined frequency mistuning as well as intentional mistuning. Copyright © 2015 by ASME.

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