TY - CHAP A1 - Butenweg, Christoph A1 - Roeser, W. T1 - Erdbebenbemessung von Stahlbetontragwerken nach DIN EN 1998-1 T2 - Stahlbetonbau aktuell : Praxishandbuch Y1 - 2012 SN - 978-3-410-21932-3 (Print) ; 978-341-02193-3-0 (E-Book) SP - A.1 EP - A.43 PB - Beuth CY - Berlin ER - TY - JOUR A1 - Stadler, Andreas M. A1 - Garvey, G. J. A1 - Bocahut, A. A1 - Sacquin-Mora, S. A1 - Digel, Ilya A1 - Schneider, G. J. A1 - Natali, F. A1 - Artmann, Gerhard A1 - Zaccai, G. T1 - Thermal fluctuations of haemoglobin from different species : adaptation to temperature via conformational dynamics JF - Journal of the Royal Society Interface N2 - Thermodynamic stability, configurational motions and internal forces of haemoglobin (Hb) of three endotherms (platypus, Ornithorhynchus anatinus; domestic chicken, Gallus gallus domesticus and human, Homo sapiens) and an ectotherm (salt water crocodile, Crocodylus porosus) were investigated using circular dichroism, incoherent elastic neutron scattering and coarse-grained Brownian dynamics simulations. The experimental results from Hb solutions revealed a direct correlation between protein resilience, melting temperature and average body temperature of the different species on the 0.1 ns time scale. Molecular forces appeared to be adapted to permit conformational fluctuations with a root mean square displacement close to 1.2 Å at the corresponding average body temperature of the endotherms. Strong forces within crocodile Hb maintain the amplitudes of motion within a narrow limit over the entire temperature range in which the animal lives. In fully hydrated powder samples of human and chicken, Hb mean square displacements and effective force constants on the 1 ns time scale showed no differences over the whole temperature range from 10 to 300 K, in contrast to the solution case. A complementary result of the study, therefore, is that one hydration layer is not sufficient to activate all conformational fluctuations of Hb in the pico- to nanosecond time scale which might be relevant for biological function. Coarse-grained Brownian dynamics simulations permitted to explore residue-specific effects. They indicated that temperature sensing of human and chicken Hb occurs mainly at residues lining internal cavities in the β-subunits. Y1 - 2012 U6 - https://doi.org/10.1098/rsif.2012.0364 SN - 1742-5689 VL - 9 IS - 76 SP - 2845 EP - 2855 PB - The Royal Society CY - London ER - TY - CHAP A1 - Dachwald, Bernd A1 - Mikucki, Jill A. A1 - Tulaczyk, Slawek A1 - Digel, Ilya A1 - Feldmann, Marco A1 - Espe, Clemens A1 - Plescher, Engelbert A1 - Xu, Changsheng T1 - IceMole - a maneuverable probe for clean in-situ analysis and sampling of subsurface ice and subglacial aquatic ecosystems : extended abstract / SCAR Open Science Conference 2012, Session 29: Advancing Clean Technologies for Exploration of Glacial Aquatic Ecosystems N2 - The ”IceMole“ is a novel maneuverable subsurface ice probe for clean in-situ analysis and sampling of subsurface ice and subglacial water/brine. It is developed and build at FH Aachen University of Applied Sciences’ Astronautical Laboratory. A first prototype was successfully tested on the Swiss Morteratsch glacier in 2010. Clean sampling is achieved with a hollow ice screw (as it is used in mountaineering) at the tip of the probe. Maneuverability is achieved with a differentially heated melting head. Funded by the German Space Agency (DLR), a consortium led by FH Aachen currently develops a much more advanced IceMole probe, which includes a sophisticated system for obstacle avoidance, target detection, and navigation in the ice. We intend to use this probe for taking clean samples of subglacial brine at the Blood Falls (McMurdo Dry Valleys, East Antarctica) for chemical and microbiological analysis. In our conference contribution, we 1) describe the IceMole design, 2) report the results of the field tests of the first prototype on the Morteratsch glacier, 3) discuss the probe’s potential for the clean in-situ analysis and sampling of subsurface ice and subglacial liquids, and 4) outline the way ahead in the development of this technology. KW - Eisschicht KW - Sonde KW - subsurface ice KW - subglacial aquatic ecosystems Y1 - 2012 ER - TY - JOUR A1 - Butenweg, Christoph A1 - Fehling, Ekkehard T1 - Hintergrund für die vereinfachten Regeln bei Mauerwerksgebäuden im Erdbebenfall JF - Mauerwerk : European journal of masonry N2 - Bei der Ausarbeitung des nationalen Anwendungsdokumentes zur DIN EN 1998-1 waren die in der ENV-Fassung enthaltenen vereinfachten Regeln im Lichte aktueller Forschungsergebnisse zu überprüfen und zu überarbeiten. Die gleiche Aufgabe stellte sich auch für die Neufassung der DIN 4149. In beiden Fällen sind neben konstruktiven Regeln für die Art und Anordnung der zur Gebäudeaussteifung heranzuziehenden Wände im Grundriss Tabellen enthalten, die unter bestimmten Bedingungen den Entfall eines rechnerischen Nachweises der Tragwände im Erdbebenfall ermöglichen. Dies ist für Schwachbebengebiete, wie sie in Deutschland und anderen Ländern Mitteleuropas anzutreffen sind, sinnvoll, um unnötigen Rechenaufwand sowie Probleme mit der Führbarkeit von Nachweisen so weit wie möglich auszuschalten. Im vorliegenden Beitrag werden die Hintergründe der vereinfachten Regeln diskutiert und die Ergebnisse der Anwendung mit verschiedenen Rechenverfahren verglichen und bewertet. Y1 - 2012 U6 - https://doi.org/10.1002/dama.201200537 SN - 1437-1022 (E-Journal); 1432-3427 (Print) VL - Volume 16 IS - Issue 3 SP - 127 EP - 137 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Butenweg, Christoph A1 - Gellert, Christoph T1 - Integrale Gebäudeplanung am Beispiel eines Geschossbaus in Ziegelmauerwerk JF - Mauerwerk : European journal of masonry N2 - Moderne Mauerwerksbauten müssen nach heutigen Anforderungen architektonisch, statisch, energetisch sowie schall- und brandschutztechnisch optimal ausgelegt sein. Aufgrund der Komplexität und engen Verzahnung der einzelnen Anforderungen ist eine integrale Gebäudeplanung zur Erzielung einer qualitativ hochwertigen Bauwerkslösung unbedingt notwendig. Diese erfordert von den Fachplanern vertieftes Spezialwissen in den verschiedenen Bereichen, um insbesondere die Schnittstellen und Bauwerksdetails korrekt zu planen und auszuführen. Der Beitrag stellt die integrale Gebäudeplanung am Beispiel eines Geschossbaus in Ziegelbauweise mit Lösungen für wesentliche Detailpunkte vor Y1 - 2012 U6 - https://doi.org/10.1002/dama.201200550 SN - 1437-1022 (E-Journal); 1432-3427 (Print) VL - Volume 16 IS - 5 SP - 247 EP - 254 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Butenweg, Christoph A1 - Holtschoppen, Britta T1 - Neuer VCI-Leitfaden für die erdbebensichere Auslegung von Industrieanlagen JF - Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen ; offizielle Zeitschrift der VDI-Gesellschaft Bautechnik Y1 - 2012 SN - 1436-4867 (E-Journal); 0005-6650 (Print) VL - Band 87 SP - S18 PB - VDI Fachmedien CY - Düsseldorf ER - TY - BOOK A1 - Meskouris, Konstantin A1 - Butenweg, Christoph A1 - Holler, Stefan A1 - Hake, Erwin T1 - Baustatik in Beispielen Y1 - 2012 SN - 978-3-642-23529-0 (Print) ; 978-3-642-23530-6 (E-Book) PB - Springer CY - Heidelberg ; Dordrecht ; London ; New York ET - 2., bearb. Aufl. ER - TY - CHAP A1 - Digel, Ilya A1 - Mansurov, Zulkhair A1 - Biisenbaev, Makhmut A1 - Savitskaya, Irina A1 - Kistaubaeva, Aida A1 - Akimbekov, Nuraly S. A1 - Zhubanova, Azhar ED - Hu, Ning T1 - Heterogeneous Composites on the Basis of Microbial Cells and Nanostructured Carbonized Sorbents T2 - Composites and Their Applications N2 - The fact that microorganisms prefer to grow on liquid/solid phase surfaces rather than in the surrounding aqueous phase was noticed long time ago [1]. Virtually any surface – animal, mineral, or vegetable – is a subject for microbial colonization and subsequent biofilm formation. It would be adequate to name just a few notorious examples on microbial colonization of contact lenses, ship hulls, petroleum pipelines, rocks in streams and all kinds of biomedical implants. The propensity of microorganisms to become surface-bound is so profound and ubiquitous that it vindicates the advantages for attached forms over their free-ranging counterparts [2]. Indeed, from ecological and evolutionary standpoints, for many microorganisms the surface-bound state means dwelling in nutritionally favorable, non-hostile environments [3]. Therefore, in most of natural and artificial ecosystems surface-associated microorganisms vastly outnumber organisms in suspension and often organize into complex communities with features that differ dramatically from those of free cells [4]. Y1 - 2012 SN - 978-953-51-0706-4 U6 - https://doi.org/10.5772/47796 SP - 249 EP - 272 PB - Intech CY - London ER - TY - CHAP A1 - Borggrafe, Andreas A1 - Ohndorf, Andreas A1 - Dachwald, Bernd A1 - Seboldt, Wolfgang T1 - Analysis of interplanetary solar sail trajectories with attitude dynamics T2 - Dynamics and Control of Space Systems 2012 N2 - We present a new approach to the problem of optimal control of solar sails for low-thrust trajectory optimization. The objective was to find the required control torque magnitudes in order to steer a solar sail in interplanetary space. A new steering strategy, controlling the solar sail with generic torques applied about the spacecraft body axes, is integrated into the existing low-thrust trajectory optimization software InTrance. This software combines artificial neural networks and evolutionary algorithms to find steering strategies close to the global optimum without an initial guess. Furthermore, we implement a three rotational degree-of-freedom rigid-body attitude dynamics model to represent the solar sail in space. Two interplanetary transfers to Mars and Neptune are chosen to represent typical future solar sail mission scenarios. The results found with the new steering strategy are compared to the existing reference trajectories without attitude dynamics. The resulting control torques required to accomplish the missions are investigated, as they pose the primary requirements to a real on-board attitude control system. Y1 - 2012 SN - 978-0-87703-587-9 SP - 1553 EP - 1569 PB - Univelt Inc CY - San Diego ER - TY - CHAP A1 - Alexopoulos, Spiros A1 - Kluczka, Sven A1 - Vaeßen, Christiane A1 - Roeb, M. A1 - Neises, M. T1 - Scenario development for efficient methanol production using CO2 and solar energy T2 - Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012 Y1 - 2012 SP - ID 99 CY - Rijeka ER -