TY - JOUR A1 - Förster, Arnold T1 - Resonant tunneling diodes operating as modern quantum transport devices JF - Proceedings of the Tenth International Workshop on the Physics of Semiconductor Devices : (December 14 - 18, 1999) / ed.: Vikram Kumar ... - Vol. 2 Y1 - 2000 SN - 81-7023-998-2 N1 - International Workshop on the Physics of Semiconductor Devices <10, 1999, Delhi> SP - 966 EP - 966 PB - Allied Publ. CY - New Delhi [u.a.] ER - TY - JOUR A1 - Förster, Arnold A1 - Vitusevich, S. A. A1 - Belyaev, A. E. A1 - Sheka, D. I. T1 - Resonant tunneling effect in a periodically modulated electrical field. Vitusevich, S.A.; Forster, A.; Belyaev, A.E.; Sheka, D.I.; Luth, H.; Klein, N.; Danylyuk, S.V.; Konakova, R. JF - Proceedings of the Tenth International Conference on Modulated Semiconductor Structures : held at the Johannes Kepler University, Linz, Austria, July 23 - 27, 2001 / MSS 10. Guest ed.: Günther Bauer ... Y1 - 2002 N1 - International Conference on Modulated Semiconductor Structures ; (10, 2001, Linz). Zugleich: Physica E: Low-dimensional Systems and Nanostructures. 13(2002)2-4. ISSN 1386-9477 SP - 811 EP - 813 PB - Elsevier CY - Amsterdam [u.a.] ER - TY - JOUR A1 - Förster, Arnold A1 - Vitusevich, S. A. A1 - Belyaev, A. E. A1 - Indlekofer, K. M. T1 - Resonant tunneling effect in delta p-n GaAs junction. Vitusevich, S. A.; Förster, A.; Belyaev, A. E.; Indlekofer, K. M.; Lüth, H.; Konakova, R. V. JF - Microelectronic Engineering. 46 (1999), H. 1-4 Y1 - 1999 SN - 0167-9317 N1 - International Conference on Micro- and Nanofabrication SP - 169 EP - 172 ER - TY - JOUR A1 - Förster, Arnold A1 - Wensorra, J. A1 - Indlekofer, K. M. A1 - Lüth, H. T1 - Resonant tunneling in nanocolumns improved by quantum collimation. Wensorra, J.; Indlekofer, K. M.; Förster, A.; Lüth, H. JF - Nano Letters. 5 (2005) Y1 - 2005 SN - 0587-4246 SP - 2470 EP - 2475 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. T1 - Response Characteristic of a Polytec HC-15 Optical Particle Counter JF - Aerosols in science, medicine and technology : Physical and chemical properties of aerosols : Association for Aerosol Research: annual conference. 1980 : Gesellschaft für Aerosolforschung: annual conference. 1980 : Aerosols in science, medicine and technology : Physical and chemical properties of aerosols : Associa-tion for Aerosol Research: annual conference. 1980 : Gesellschaft für Aerosolforschung: annual conference. 1980 : Schmallenberg, 22.10.80 - 24.10.80 Y1 - 1981 N1 - Journal of aerosol science. Volume 0012 ; no 003 SP - 287 EP - 292 PB - Pergamon Pr. CY - Oxford ER - TY - JOUR A1 - Helsper, Christoph A1 - Bartz, H. A1 - Fißan, H. J. A1 - Kousaka, Y. (u.a.) T1 - Response Characteristics for Four Condensation Nucleus Counters to Particles in the 3 to 50 nm Diameter Range / Bartz, H. ; Fißan, H. J. ; Helsper, C.; Kousaka, Y. ; Okuyama, K. ; Keady, R. Fruin, S. ; McMurry, P. H.; Pui, D. Y. H. ; Stolzenburg, M. R. JF - Journal of Aerosol Science. 16 (1985), H. 5 Y1 - 1985 SN - 0021-8502 SP - 443 EP - 456 ER - TY - JOUR A1 - Hoffschmidt, Bernhard A1 - Krüger, D. A1 - Hennecke, K. T1 - Results from parabolic trough systems for process heat at the DLR Cologne / D. Krüger ; B. Hoffschmidt ; K. Hennecke ... JF - Solar thermal 2000 : proceedings of the 10th SolarPACES International Symposium on Solar Thermal Concentrating Technologies, Sydney, Australia, 8 - 10 March 2000 ; part of the Y1 - 2000 N1 - International Symposium on Solar Thermal Concentrating Technologies <10, 2000, Sydney> SP - 113 EP - 120 CY - Sydney ER - TY - JOUR A1 - Sattler, Johannes Christoph A1 - Röger, Marc A1 - Schwarzbözl, Peter A1 - Buck, Reiner A1 - Macke, Ansgar A1 - Raeder, Christian A1 - Göttsche, Joachim T1 - Review of heliostat calibration and tracking control methods JF - Solar Energy N2 - Large scale central receiver systems typically deploy between thousands to more than a hundred thousand heliostats. During solar operation, each heliostat is aligned individually in such a way that the overall surface normal bisects the angle between the sun’s position and the aim point coordinate on the receiver. Due to various tracking error sources, achieving accurate alignment ≤1 mrad for all the heliostats with respect to the aim points on the receiver without a calibration system can be regarded as unrealistic. Therefore, a calibration system is necessary not only to improve the aiming accuracy for achieving desired flux distributions but also to reduce or eliminate spillage. An overview of current larger-scale central receiver systems (CRS), tracking error sources and the basic requirements of an ideal calibration system is presented. Leading up to the main topic, a description of general and specific terms on the topics heliostat calibration and tracking control clarifies the terminology used in this work. Various figures illustrate the signal flows along various typical components as well as the corresponding monitoring or measuring devices that indicate or measure along the signal (or effect) chain. The numerous calibration systems are described in detail and classified in groups. Two tables allow the juxtaposition of the calibration methods for a better comparison. In an assessment, the advantages and disadvantages of individual calibration methods are presented. Y1 - 2020 U6 - https://doi.org/10.1016/j.solener.2020.06.030 VL - 207 SP - 110 EP - 132 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Kern, Alexander A1 - Braun, Christian T1 - Risk management according to IEC 62305-2 edition 2: 2010–12 assessment of structures with a risk of explosion T2 - 2014 International Conference on Lightning Protection (ICLP), Shanghai, China N2 - Risk management for structures with a risk of explosion should be considered very carefully when performing a risk analysis according to IEC 62305-2. In contrast to the 2006 edition of the standard, the 2010 edition describes the topic “Structures with a risk of explosion” in more detail. Moreover, in Germany separate procedures and parameters are defined for the risk analysis of structures with a risk of explosion (Supplement 3 of the German DIN EN 62305-2 standard). This paper describes the contents and the relevant calculations of this Supplement 3, together with a numerical example. Y1 - 2014 SP - 1237 EP - 1242 ER - TY - CHAP A1 - El-Deib, Khaled A1 - Chudoba, Rostislav A1 - Butenweg, Christoph A1 - Meskouris, Konstantin A1 - Könke, Carsten A1 - Bettzieche, Volker T1 - Safety assessment of rockfill and masonry dams T2 - Structural dynamics - EURODYN 2002 : proceedings of the 4th [i.e. 5th] International Conference on Structural Dynamics, Munich, Germany, 2 - 5 September 2002 / ed. by H. Grundmann ... Vol. 1 Y1 - 2002 SN - 90-5809-510-X SP - 237 EP - 242 PB - Balkema CY - Lisse ER - TY - CHAP A1 - Meskouris, Konstantin A1 - Holtschoppen, Britta A1 - Butenweg, Christoph A1 - Rosin, Julia T1 - Seismic analysis of liquid storage tanks T2 - Earthquake Geology and Archaeology: Science, Society and Critical facilities : proceedings ; 2nd INQUA-IGCP 567 International Workshop on Active Tectonics, Earthquake Geology, Archaeology and Engineering ; 19-24 September 2011, Corinth (Greece) / Eds.: C. Grützner ; R. Pérez-Lopez ; T. Fernández Steeger ; I. Papanikolaou ; K. Reicherter ; P. G. Silva ; A. Vött. Volume 2 Y1 - 2011 SN - 978-960-466-093-3 SP - 136 EP - 139 PB - The Natural hazards Laboratory, National and Kapodistrian University of Athens CY - Athens ER - TY - CHAP A1 - Meskouris, Konstantin A1 - Butenweg, Christoph A1 - Mistler, Michael A1 - Kuhlmann, Wolfram T1 - Seismic behaviour of historic masonry buildings T2 - 7th National Congress on Mechanics : Chania, Crete, June 24 - 26, 2004 ; proceedings / ed. A. Kounadis .... Y1 - 2004 SP - 47 EP - 49 PB - Hellenic Society for Theoretical and Applied Mechanics CY - Chania ER - TY - CHAP A1 - Marinkovic, Marko A1 - Butenweg, Christoph T1 - Seismic behaviour of RC frames with uncoupled masonry infills having two storeys or two bays T2 - Brick and Block Masonry - From Historical to Sustainable Masonry. Proceedings of the 17th International Brick/Block Masonry Conference N2 - Reinforced concrete (RC) structures with masonry infills are widely used for several types of buildings all over the world. However, it is well known that traditional masonry infills constructed with rigid contact to the surrounding RC frame performed rather poor in past earthquakes. Masonry infills showed severe in-plane damages and failed in many cases under out-of-plane seismic loading. As the undesired interactions between frames and infills changes the load transfer on building level, complete collapses of buildings were observed. A possible solution is uncoupling of masonry infills to the frame to reduce the infill contribution activated by the frame deformation under horizontal loading. The paper presents numerical simulations on RC frames equipped with the innovative decoupling system INODIS. The system was developed within the European project INSYSME and allows an effective uncoupling of frame and infill. The simulations are carried out with a micro-modelling approach, which is able to predict the complex nonlinear behaviour resulting from the different materials and their interaction. Each brick is modelled individually and connected taking into account nonlinearity of a brick mortar interface. The calibration of the model is based on small specimen tests and experimental results for one bay one storey frame are used for the validation. The validated model is further used for parametric studies on two storey and two bay infilled frames. The response and change of the structural stiffness are analysed and compared to the traditionally infilled frame. The results confirm the effectiveness of the INODIS system with less damage and relatively low contribution of the infill at high drift levels. In contrast to the uncoupled system configurations, traditionally infilled frames experienced brittle failure at rather low drift levels. Y1 - 2020 U6 - https://doi.org/10.1201/9781003098508-72 N1 - 17th International Brick/Block Masonry Conference (17thIB2MaC 2020), July 5-8, 2020, Kraków, Poland SP - 1 EP - 7 PB - CRC Press CY - London ER - TY - CHAP A1 - Butenweg, Christoph ED - Vacareanu, Radu ED - Ionescu, Constantin T1 - Seismic design and evaluation of industrial facilities T2 - The Third European Conference on Earthquake Engineering and Seismology N2 - Industrial facilities must be thoroughly designed to withstand seismic actions as they exhibit an increased loss potential due to the possibly wideranging damage consequences and the valuable process engineering equipment. Past earthquakes showed the social and political consequences of seismic damage to industrial facilities and sensitized the population and politicians worldwide for the possible hazard emanating from industrial facilities. However, a holistic approach for the seismic design of industrial facilities can presently neither be found in national nor in international standards. The introduction of EN 1998-4 of the new generation of Eurocode 8 will improve the normative situation with specific seismic design rules for silos, tanks and pipelines and secondary process components. The article presents essential aspects of the seismic design of industrial facilities based on the new generation of Eurocode 8 using the example of tank structures and secondary process components. The interaction effects of the process components with the primary structure are illustrated by means of the experimental results of a shaking table test of a three story moment resisting steel frame with different process components. Finally, an integrated approach of digital plant models based on building information modelling (BIM) and structural health monitoring (SHM) is presented, which provides not only a reliable decision-making basis for operation, maintenance and repair but also an excellent tool for rapid assessment of seismic damage. KW - Industrial facilities KW - Seismic design KW - Tanks KW - EN 1998-4 KW - Structural health monitoring Y1 - 2022 SN - 978-3-031-15103-3 SN - 978-3-031-15106-4 SN - 978-3-031-15104-0 U6 - https://doi.org/10.1007/978-3-031-15104-0 SN - 2524-342X SN - 2524-3438 N1 - 3ECEES - Third European Conference on Earthquake Engineering and Seismology, September 4 – September 9, 2022, Bucharest SP - 449 EP - 464 PB - Springer CY - Cham ER - TY - CHAP A1 - Rosin, Julia A1 - Kubalski, Thomas A1 - Butenweg, Christoph T1 - Seismic Design of cylindrical liquid storage tanks T2 - Seismic design of industrial facilities : proceedings of the International Conference on Seismic Design of Industrial Facilities (SeDIF-Conference) ; [Aachen, 26. - 27. September 2013] / Chair of Structural Statics and Dynamics, RWTH Aachen. Sven Klinkel ..., ed. Y1 - 2014 SN - 978-3-658-02810-7 (E-Book) ; 978-3-658-02809-1 (Print) U6 - https://doi.org/10.1007/978-3-658-02810-7_36 SP - 429 EP - 440 PB - Springer Vieweg CY - Wiesbaden ER - TY - BOOK A1 - Klinkel, Sven A1 - Butenweg, Christoph A1 - Lin, Gao A1 - Holtschoppen, Britta T1 - Seismic design of industrial facilities : Proceedings of the International Conference on Seismic Design of Industrial Facilities (SeDIF) / Sven Klinkel, Christoph Butenweg, Gao Lin, Britta Holtschoppen Editors Y1 - 2014 SN - 978-3-658-02809-1 (Print) ; 978-365-80281-0-7 (E-Book) U6 - https://doi.org/10.1007/978-3-658-02810-7 PB - Springer Vieweg CY - Wiesbaden ER - TY - CHAP A1 - Reindl, Lukas A1 - Park, Jin A1 - Norda, Hannah A1 - Butenweg, Christoph T1 - Seismic design of masonry walls subject to out-of-plane bending T2 - Proceedings of the Tenth International Conference on Computational Structures Technology : Valencia, Spain, 14 - 17 September 2010 / organised in association with: Universidad Politecnica de Valencia ... Ed. by B. H. V. Topping ... Y1 - 2010 SN - 978-1-905088-36-2 U6 - https://doi.org/10.4203/ccp.93.348 SP - Paper 348 PB - Civil-Comp Press CY - Kippen ER - TY - JOUR A1 - Holtschoppen, Britta A1 - Butenweg, Christoph A1 - Meskouris, Konstantin T1 - Seismic design of non-structural components in industrial facilities JF - International journal of engineering under uncertainty Y1 - 2009 SN - 0975-4806 VL - Volume 1 SP - 1 EP - 13 ER - TY - CHAP A1 - Butenweg, Christoph A1 - Holtschoppen, Britta T1 - Seismic design of structures and components in industrial units T2 - Structural Dynamics with Applications in Earthquake and Wind Engineering N2 - Industrial units consist of the primary load-carrying structure and various process engineering components, the latter being by far the most important in financial terms. In addition, supply structures such as free-standing tanks and silos are usually required for each plant to ensure the supply of material and product storage. Thus, for the earthquake-proof design of industrial plants, design and construction rules are required for the primary structures, the secondary structures and the supply structures. Within the framework of these rules, possible interactions of primary and secondary structures must also be taken into account. Importance factors are used in seismic design in order to take into account the usually higher risk potential of an industrial unit compared to conventional building structures. Industrial facilities must be able to withstand seismic actions because of possibly wide-ranging damage consequences in addition to losses due to production standstill and the destruction of valuable equipment. The chapter presents an integrated concept for the seismic design of industrial units based on current seismic standards and the latest research results. Special attention is devoted to the seismic design of steel thin-walled silos and tank structures. KW - Industrial units KW - Seismic design KW - Tanks KW - Silos KW - Components Y1 - 2019 SN - 978-3-662-57550-5 U6 - https://doi.org/10.1007/978-3-662-57550-5_5 SP - 359 EP - 481 PB - Springer CY - Berlin ER - TY - CHAP A1 - Wagner, R. A1 - Noh, S.-Y. A1 - Butenweg, Christoph A1 - Meskouris, Konstantin T1 - Seismic excited granular material silos T2 - Structural dynamics - EURODYN 2002 : proceedings of the 4th [i.e. 5th] International Conference on Structural Dynamics, Munich, Germany, 2 - 5 September 2002 / ed. by H. Grundmann ... Y1 - 2002 SN - 90-5809-511-8 SP - 253 EP - 258 PB - Balkema CY - Lisse ER - TY - CHAP A1 - Rajan, Sreelakshmy A1 - Holtschoppen, B. A1 - Dalguer, L. A. A1 - Klinkel, S. A1 - Butenweg, Christoph ED - Sas, P. T1 - Seismic fragility analysis of a non-conventional reinforced concrete structure considering different uncertainties T2 - Proceedings of ISMA2016, International Conference on Noise and Vibration Engineering/USD2016, International Conference on Uncertainty in Structural Dynamics, / ISMA 2016, USD 2016 Y1 - 2016 SP - 4213 EP - 4225 PB - KU Leuven CY - Leuven ER - TY - RPRT A1 - Butenweg, Christoph A1 - Kaiser, Diethelm T1 - Seismic hazard harmonisation in Europe (SHARE) : DGEB-Workshop in Frankfurt a.M., Germany, 27. May 2014 / Christoph Butenweg, Diethelm Kaiser (editors) Y1 - 2014 SN - 3-930108-12-7 PB - DGEB CY - Aachen ER - TY - CHAP A1 - Schmitt, Timo A1 - Rosin, Julia A1 - Butenweg, Christoph T1 - Seismic Impact And Design Of Buried Pipelines T2 - 16th European Conference on Earthquake Engineering, Thessaloniki, 18-21 June, 2018 N2 - Seismic design of buried pipeline systems for energy and water supply is not only important for plant and operational safety but also for the maintenance of the supply infrastructure after an earthquake. The present paper shows special issues of the seismic wave impacts on buried pipelines, describes calculation methods, proposes approaches and gives calculation examples. This paper regards the effects of transient displacement differences and resulting tensions within the pipeline due to the wave propagation of the earthquake. However, the presented model can also be used to calculate fault rupture induced displacements. Based on a three-dimensional Finite Element Model parameter studies are performed to show the influence of several parameters such as incoming wave angle, wave velocity, backfill height and synthetic displacement time histories. The interaction between the pipeline and the surrounding soil is modeled with non-linear soil springs and the propagating wave is simulated affecting the pipeline punctually, independently in time and space. Special attention is given to long-distance heat pipeline systems. Here, in regular distances expansion bends are arranged to ensure movements of the pipeline due to high temperature. Such expansion bends are usually designed with small bending radii, which during the earthquake lead to high bending stresses in the cross-section of the pipeline. Finally, an interpretation of the results and recommendations are given for the most critical parameters. Y1 - 2018 N1 - Paper No 10600 SP - 1 EP - 12 ER - TY - CHAP A1 - Rosin, Julia A1 - Butenweg, Christoph T1 - Seismic isolation of cylindrical liquid storage tanks T2 - Proceedings of the 9th European Conference on Structural Dynamics, EURODYN 2014 Porto, Portugal, 30 June - 2 July 2014 / A. Cunha, E. Caetano, .... (eds.) Y1 - 2014 SN - 978-972-752-165-4 SP - 3145 EP - 3152 CY - Porto ER - TY - CHAP A1 - Rosin, Julia A1 - Kubalski, Thomas A1 - Butenweg, Christoph ED - Klinkel, Sven ED - Butenweg, Christoph ED - Lin, Gao ED - Holtschoppen, Britta T1 - Seismic isolation of cylindrical liquid storage tanks T2 - Seismic design of industrial facilities N2 - Seismic excited liquid filled tanks are subjected to extreme loading due to hydrodynamic pressures, which can lead to nonlinear stability failure of the thinwalled cylindrical tanks, as it is known from past earthquakes. A significant reduction of the seismically induced loads can be obtained by the application of base isolation systems, which have to be designed carefully with respect to the modified hydrodynamic behaviour of the tank in interaction with the liquid. For this reason a highly sophisticated fluid-structure interaction model has to be applied for a realistic simulation of the overall dynamic system. In the following, such a model is presented and compared with the results of simplified mathematical models for rigidly supported tanks. Finally, it is examined to what extent a simple mechanical model can represent the behaviour of a base isolated tank in case of seismic excitation Y1 - 2013 SN - 978-3-658-02810-7 SN - 978-3-658-02809-1 SN - 978-3-658-14037-3 U6 - https://doi.org/10.1007/978-3-658-02810-7_36 N1 - International Conference on Seismic Design of Industrial Facilities, Aachen, Germany, 26.-27.09.2013. https://sedif-conference.jimdofree.com/ SP - 429 EP - 440 PB - Springer Vieweg CY - Wiesbaden ER - TY - JOUR A1 - Butenweg, Christoph A1 - Bursi, Oreste S. A1 - Paolacci, Fabrizio A1 - Marinković, Marko A1 - Lanese, Igor A1 - Nardin, Chiara A1 - Quinci, Gianluca ED - Yang, J. T1 - Seismic performance of an industrial multi-storey frame structure with process equipment subjected to shake table testing JF - Engineering Structures N2 - Past earthquakes demonstrated the high vulnerability of industrial facilities equipped with complex process technologies leading to serious damage of process equipment and multiple and simultaneous release of hazardous substances. Nonetheless, current standards for seismic design of industrial facilities are considered inadequate to guarantee proper safety conditions against exceptional events entailing loss of containment and related consequences. On these premises, the SPIF project -Seismic Performance of Multi-Component Systems in Special Risk Industrial Facilities- was proposed within the framework of the European H2020 SERA funding scheme. In detail, the objective of the SPIF project is the investigation of the seismic behaviour of a representative industrial multi-storey frame structure equipped with complex process components by means of shaking table tests. Along this main vein and in a performance-based design perspective, the issues investigated in depth are the interaction between a primary moment resisting frame (MRF) steel structure and secondary process components that influence the performance of the whole system; and a proper check of floor spectra predictions. The evaluation of experimental data clearly shows a favourable performance of the MRF structure, some weaknesses of local details due to the interaction between floor crossbeams and process components and, finally, the overconservatism of current design standards w.r.t. floor spectra predictions. KW - Multi-storey KW - Frame structure KW - Earthquake KW - Tank KW - Piping Y1 - 2021 U6 - https://doi.org/10.1016/j.engstruct.2021.112681 SN - 0141-0296 VL - 243 IS - 15 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Butenweg, Christoph A1 - Marinković, Marko A1 - Pavese, Alberto A1 - Lanese, Igor A1 - Hoffmeister, Benno A1 - Pinkawa, Marius A1 - Vulcu, Mihai-Cristian A1 - Bursi, Oreste A1 - Nardin, Chiara A1 - Paolacci, Fabrizio A1 - Quinci, Gianluca A1 - Fragiadakis, Michalis A1 - Weber, Felix A1 - Huber, Peter A1 - Renault, Philippe A1 - Gündel, Max A1 - Dyke, Shirley A1 - Ciucci, M. A1 - Marino, A. T1 - Seismic performance of multi-component systems in special risk industrial facilities T2 - Proceedings of the seventeenth world conference on earthquake engineering N2 - Past earthquakes demonstrated the high vulnerability of industrial facilities equipped with complex process technologies leading to serious damage of the process equipment and multiple and simultaneous release of hazardous substances in industrial facilities. Nevertheless, the design of industrial plants is inadequately described in recent codes and guidelines, as they do not consider the dynamic interaction between the structure and the installations and thus the effect of seismic response of the installations on the response of the structure and vice versa. The current code-based approach for the seismic design of industrial facilities is considered not enough for ensure proper safety conditions against exceptional event entailing loss of content and related consequences. Accordingly, SPIF project (Seismic Performance of Multi- Component Systems in Special Risk Industrial Facilities) was proposed within the framework of the European H2020 - SERA funding scheme (Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe). The objective of the SPIF project is the investigation of the seismic behavior of a representative industrial structure equipped with complex process technology by means of shaking table tests. The test structure is a three-story moment resisting steel frame with vertical and horizontal vessels and cabinets, arranged on the three levels and connected by pipes. The dynamic behavior of the test structure and installations is investigated with and without base isolation. Furthermore, both firmly anchored and isolated components are taken into account to compare their dynamic behavior and interactions with each other. Artificial and synthetic ground motions are applied to study the seismic response at different PGA levels. After each test, dynamic identification measurements are carried out to characterize the system condition. The contribution presents the numerical simulations to calibrate the tests on the prototype, the experimental setup of the investigated structure and installations, selected measurement data and finally describes preliminary experimental results. KW - industrial facilities KW - piping KW - installations KW - seismic loading KW - earthquakes Y1 - 2021 N1 - 17. World Conference on Earthquake Engineering, 17WCEE, Sendai, Japan, 2021-09-27 - 2021-10-02 ER - TY - CHAP A1 - Butenweg, Christoph A1 - Mistler, Michael T1 - Seismic resistance of unreinforced masonry buildings T2 - Proceedings of the Eighth International Conference on Computational Structures Technology : [Las Palmas de Cran Canaria, 12-15 September 2006] / ed. by B. H. V. Topping ... Y1 - 2006 SN - 1-905088-06-X U6 - https://doi.org/10.4203/ccp.83.9 SP - Paper 9 PB - Civil-Comp Press CY - Stirling ER - TY - JOUR A1 - Mykoniou, Konstantin A1 - Butenweg, Christoph A1 - Holtschoppen, Britta A1 - Klinkel, Sven T1 - Seismic response analysis of adjacent liquid-storage tanks JF - Earthquake engineering and structural dynamics N2 - A refined substructure technique in the frequency domain is developed, which permits consideration of the interaction effects among adjacent containers through the supporting deformable soil medium. The tank-liquid systems are represented by means of mechanical models, whereas discrete springs and dashpots stand for the soil beneath the foundations. The proposed model is employed to assess the responses of adjacent circular, cylindrical tanks for harmonic and seismic excitations over wide range of tank proportions and soil conditions. The influence of the number, spatial arrangement of the containers and their distance on the overall system's behavior is addressed. The results indicate that the cross-interaction effects can substantially alter the impulsive components of response of each individual element in a tank farm. The degree of this impact is primarily controlled by the tank proportions and the proximity of the predominant natural frequencies of the shell-liquid-soil systems and the input seismic motion. The group effects should be not a priori disregarded, unless the tanks are founded on shallow soil deposit overlying very stiff material or bedrock. KW - liquid-structure interaction KW - seismic response KW - impulsive effects KW - liquid-storage tank KW - structure-soil-structure interaction Y1 - 2016 U6 - https://doi.org/10.1002/eqe.2726 SN - 1096-9845 (E-Journal); 0098-8847 (Print) VL - 45 IS - 11 SP - 1779 EP - 1796 PB - Wiley-VCH CY - Weinheim ER - TY - CHAP A1 - Cacciatore, Pamela A1 - Butenweg, Christoph T1 - Seismic safety of cylindrical granular material steel silos under seismic loading T2 - Seismic design of industrial facilities 2020 Y1 - 2020 SN - 978-3-86359-729-0 N1 - 2nd International Conference on Seismic Design of Industrial Facilities (Aachen, Germany, March 4-5, 2020) SP - 231 EP - 244 PB - Apprimus Verlag CY - Aachen ER - TY - CHAP A1 - Gellert, Christoph A1 - Park, Jin A1 - Butenweg, Christoph T1 - Seismic safety verification of masonry structures T2 - Proceedings of the Eight International Masonry Conference : held in Dresden from 4th to 7th of July 2010 / [International Masonry Society ; Technische Universität Dresden]. Ed. by: Wolfram Jäger ... Volume 1. (Masonry / International Masonry Society Special Publication ; 11) Y1 - 2010 SN - 978-3-00-031381-3 SP - 813 EP - 822 PB - ARGE 8IMC Dresden CY - Radebeul ER - TY - CHAP A1 - Tomić, Igor A1 - Penna, Andrea A1 - DeJong, Matthew A1 - Butenweg, Christoph A1 - Correia, António A. A1 - Candeias, Paulo X. A1 - Senaldi, Ilaria A1 - Guerrini, Gabriele A1 - Malomo, Daniele A1 - Beyer, Katrin T1 - Seismic testing of adjacent interacting masonry structures T2 - 12th International Conference on Structural Analysis of Historical Constructions (SAHC 2020) N2 - In many historical centres in Europe, stone masonry buildings are part of building aggregates, which developed when the layout of the city or village was densified. In these aggregates, adjacent buildings share structural walls to support floors and roofs. Meanwhile, the masonry walls of the façades of adjacent buildings are often connected by dry joints since adjacent buildings were constructed at different times. Observations after for example the recent Central Italy earthquakes showed that the dry joints between the building units were often the first elements to be damaged. As a result, the joints opened up leading to pounding between the building units and a complicated interaction at floor and roof beam supports. The analysis of such building aggregates is very challenging and modelling guidelines do not exist. Advances in the development of analysis methods have been impeded by the lack of experimental data on the seismic response of such aggregates. The objective of the project AIMS (Seismic Testing of Adjacent Interacting Masonry Structures), included in the H2020 project SERA, is to provide such experimental data by testing an aggregate of two buildings under two horizontal components of dynamic excitation. The test unit is built at half-scale, with a two-storey building and a one-storey building. The buildings share one common wall while the façade walls are connected by dry joints. The floors are at different heights leading to a complex dynamic response of this smallest possible building aggregate. The shake table test is conducted at the LNEC seismic testing facility. The testing sequence comprises four levels of shaking: 25%, 50%, 75% and 100% of nominal shaking table capacity. Extensive instrumentation, including accelerometers, displacement transducers and optical measurement systems, provides detailed information on the building aggregate response. Special attention is paid to the interface opening, the globa KW - Historical centres KW - Stone masonry KW - Adjacent buildings KW - Shake table test Y1 - 2020 U6 - https://doi.org/10.23967/sahc.2021.234 N1 - 12th International Conference on Structural Analysis of Historical Constructions (SAHC 2021), September 29-30 and October 1, 2021, online N1 - (SAHC 2020 ursprünglich geplant für September 2020 in Barelona - verschoben wg. Covid-Pandemie) SP - 1 EP - 12 ER - TY - CHAP A1 - Churilov, Sergej A1 - Dumova-Jovanoska, Elena A1 - Butenweg, Christoph ED - Adam, Christoph ED - Heuer, Rudolf ED - Lenhardt, Wolfgang ED - Schranz, Christian T1 - Seismic verification of existing masonry buildings and strengthening with reinforced concrete jackets T2 - Proceedings - Vienna Congress on Recent Advances in Earthquake Engineering and Structural Dynamics 2013 (VEESD 2013) N2 - A methodology for assessment, seismic verification and strengthening of existing masonry buildings is presented in this paper. The verification is performed using a calculation model calibrated with the results from ambient vibration measurements. The calibrated model serves as an input for a deformation-based verification procedure based on the Capacity Spectrum Method (CSM). The bearing capacity of the building is calculated from experimental capacity curves of the individual walls idealized with bilinear elastic-perfectly plastic curves. The experimental capacity curves were obtained from in-plane cyclic loading tests on unreinforced and strengthened masonry walls with reinforced concrete jackets. The seismic action is compared with the load-bearing capacity of the building considering non-linear material behavior with its post-peak capacity. The application of the CSM to masonry buildings and the influence of a traditional strengthening method are demonstrated on the example of a public school building in Skopje, Macedonia. Y1 - 2013 SN - 978-3-902749-04-8 N1 - Vienna Congress on Recent Advances in Earthquake Engineering and Structural Dynamics, Vienna, Austria, Paper No. 523 13. D-A-CH Tagung ; Vienna, Austria, 29. - 30. August 2013 http://hdl.handle.net/20.500.12188/15830 (Error - Cannot Connect to Server) ER - TY - CHAP A1 - Kuhlmann, Wolfram A1 - Butenweg, Christoph A1 - Lopez, Marijen A1 - Fernandez, Sebastian T1 - Seismic vulnerability assessment of the historic Aachen Cathedral T2 - Conference proceedings / 13th World Conference on Earthquake Engineering [Vancouver, British Columbia, Canada, August 1 - 6, 2004] / [hosted by CAEE/ACGP, Canadian Association for Earthquake Engineering] Y1 - 2004 SP - 1 EP - 14 PB - CAEE CY - Vancouver ER - TY - CHAP A1 - Renault, Philippe A1 - Butenweg, Christoph A1 - Mistler, Michael T1 - Seismic vulnerability assessment system for bridges T2 - Proceedings of the Tenth International Conference on Civil, Structural and Environmental Engineering Computing : [Rome, Italy, 30. August - 2. September 2005] / ed. by B. H. V. Topping Y1 - 2005 SN - 1-905088-00-0 SP - 1 EP - 14 PB - Civil-Comp Press CY - Stirling ER - TY - JOUR A1 - Förster, Arnold A1 - Kordos, P. A1 - Betko, J. T1 - Semi-insulating GaAs layers grown by molecular-beam epitaxy / P. Kordos ; A. Förster ; J. Betko ... JF - Applied physics letters. 67 (1995), H. 7 Y1 - 1995 SN - 0003-6951 N1 - ISSN der E-Ausg.: 1077-3118 SP - 983 EP - 985 ER - TY - JOUR A1 - Keller, Johannes A1 - Rath, Volker A1 - Bruckmann, Johanna A1 - Mottaghy, Darius A1 - Clauser, Christoph A1 - Wolf, Andreas A1 - Seidler, Ralf A1 - Bücker, H. Martin A1 - Klitzsch, Norbert T1 - SHEMAT-Suite: An open-source code for simulating flow, heat and species transport in porous media JF - SoftwareX N2 - SHEMAT-Suite is a finite-difference open-source code for simulating coupled flow, heat and species transport in porous media. The code, written in Fortran-95, originates from geoscientific research in the fields of geothermics and hydrogeology. It comprises: (1) a versatile handling of input and output, (2) a modular framework for subsurface parameter modeling, (3) a multi-level OpenMP parallelization, (4) parameter estimation and data assimilation by stochastic approaches (Monte Carlo, Ensemble Kalman filter) and by deterministic Bayesian approaches based on automatic differentiation for calculating exact (truncation error-free) derivatives of the forward code. Y1 - 2020 U6 - https://doi.org/10.1016/j.softx.2020.100533 SN - 2352-7110 VL - 12 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Kern, Alexander A1 - Zischank, Wolfgang J. A1 - Heidler, Fridolin A1 - Wiesinger, J. [u.a.] T1 - Shielding effectiveness of reinforced concrete cable ducts carrying partial lightning currents JF - Conference proceedings : 14th - 18th September 1998, [Burlington Hotel, Birmingham, United Kingdom] / organised by: School of Engineering and Advanced Technology, Staffordshire University, United Kingdom Y1 - 1998 N1 - International Conference on Lightning Protection <24, 1998, Birmingham> ; School of Engineering and Advanced Technology ; ICLP <4, 1998, Birmingham> CY - Birmingham ER - TY - JOUR A1 - Schwarzer, Klemens A1 - Müller, C. A1 - Kleine-Hering, H. T1 - Simple solar systems for heating, hot water and cooking in high altitude regions with high solar radiation / C. Müller ; K. Schwarzer ; H. Kleine-Hering JF - Proceedings / organised by: ISES Europe ... [Ed.: Deutsche Gesellschaft für Sonnenenergie e.V. - DGS, Munich ; PSE GmbH - Forschung Entwicklung Marketing, Freiburg]. - Vol 1 Y1 - 2004 SN - 3-9809656-1-9 N1 - EuroSun <5, 2004, Freiburg, Breisgau> ; Internationales Sonnenforum <14, 2004, Freiburg, Breisgau> ; Deutsche Gesellschaft für Sonnenenergie ; CD-ROM-Ausg.: ISBN 3-9809656-4-3 SP - 1-653-1-658 PB - PSE CY - Freiburg [Breisgau] ER - TY - JOUR A1 - Jildeh, Zaid B. A1 - Wagner, Torsten A1 - Schöning, Michael Josef A1 - Pieper, Martin T1 - Simulating the electromagnetic‐thermal treatment of thin aluminium layers for adhesion improvement JF - Physica status solidi (a) N2 - A composite layer material used in packaging industry is made from joining layers of different materials using an adhesive. An important processing step in the production of aluminium-containing composites is the surface treatment and consequent coating of adhesive material on the aluminium surface. To increase adhesion strength between aluminium layer and the adhesive material, the foil is heat treated. For efficient heating, induction heating was considered as state-of-the-art treatment process. Due to the complexity of the heating process and the unpredictable nature of the heating source, the control of the process is not yet optimised. In this work, a finite element analysis of the process was established and various process parameters were studied. The process was simplified and modelled in 3D. The numerical model contains an air domain, an aluminium layer and a copper coil fitted with a magnetic field concentrating material. The effect of changing the speed of the aluminium foil (or rolling speed) was studied with the change of the coil current. Statistical analysis was used for generating a general control equation of coil current with changing rolling speed. Y1 - 2015 U6 - https://doi.org/10.1002/pssa.201431893 SN - 1862-6319 VL - Vol. 212 IS - 6 SP - 1234 EP - 1241 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Kern, Alexander T1 - Simulation and measurement of melting effects on metal sheets caused by direct lightning strikes JF - 1991 International Aerospace and Ground Conference on Lightning and Static Electricity : proceedings of a conference ... held at Cocoa Beach, Florida, April 16-19, 1991 / NASA Y1 - 1991 N1 - International Aerospace and Ground Conference on Lightning and Static Electricity <1991, Cocoa Beach, Fla.> ; United States / National Aeronautics and Space Administration CY - Washington, DC ER - TY - CHAP A1 - Augenstein, Eckardt A1 - Herbergs, S. A1 - Kuperjans, Isabel A1 - Lucas, K. ED - Kjelstrup, Signe T1 - Simulation of industrial energy supply systems with integrated cost optimization T2 - Proceedings of ECOS 2005, the 18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems : Trondheim, Norway, June 20 - 22, 2005. - Vol. 2 Y1 - 2005 SN - 82-519-2041-8 N1 - CD-ROM-Ausg. u.d.T.: Shaping our future energy systems SP - 627 EP - 634 PB - Tapir Academic Press CY - Trondheim ER - TY - JOUR A1 - Kern, Alexander A1 - Frentzel, Ralf A1 - Behrens, Jörg T1 - Simulation of the transient voltages in the auxiliary power network of a large power plant in case of a direct lightning strike to the high-voltage overhead transmission line Y1 - 2010 N1 - 30th International Conference on Lightning Protection, Cagliari (Italien), 2010 SP - 749-1 EP - 749-7 ER - TY - CHAP A1 - El Moussaoui, Noureddine A1 - Kassmi, Khalil A1 - Alexopoulos, Spiros A1 - Schwarzer, Klemens A1 - Chayeb, Hamid A1 - Bachiri, Najib T1 - Simulation studies on a new innovative design of a hybrid solar distiller MSDH alimented with a thermal and photovoltaic energy T2 - Materialstoday: Proceedings N2 - In this paper, we present the structure, the simulation the operation of a multi-stage, hybrid solar desalination system (MSDH), powered by thermal and photovoltaic (PV) (MSDH) energy. The MSDH system consists of a lower basin, eight horizontal stages, a field of four flat thermal collectors with a total area of 8.4 m2, 3 Kw PV panels and solar batteries. During the day the system is heated by thermal energy, and at night by heating resistors, powered by solar batteries. These batteries are charged by the photovoltaic panels during the day. More specifically, during the day and at night, we analyse the temperature of the stages and the production of distilled water according to the solar irradiation intensity and the electric heating power, supplied by the solar batteries. The simulations were carried out in the meteorological conditions of the winter month (February 2020), presenting intensities of irradiance and ambient temperature reaching 824 W/m2 and 23 °C respectively. The results obtained show that during the day the system is heated by the thermal collectors, the temperature of the stages and the quantity of water produced reach 80 °C and 30 Kg respectively. At night, from 6p.m. the system is heated by the electric energy stored in the batteries, the temperature of the stages and the quantity of water produced reach respectively 90 °C and 104 Kg for an electric heating power of 2 Kw. Moreover, when the electric power varies from 1 Kw to 3 Kw the quantity of water produced varies from 92 Kg to 134 Kg. The analysis of these results and their comparison with conventional solar thermal desalination systems shows a clear improvement both in the heating of the stages, by 10%, and in the quantity of water produced by a factor of 3. Y1 - 2021 U6 - https://doi.org/10.1016/j.matpr.2021.03.115 SN - 2214-7853 N1 - The Fourth edition of the International Conference on Materials & Environmental Science (ICMES 2020), virtual conference, November 18-28, 2020, Morocco VL - 45 IS - 8 SP - 7653 EP - 7660 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Förster, Arnold A1 - Griebel, M. A1 - Indlekofer, K.M. A1 - Lüth, H. T1 - Single electron transport in resonant tunnelling diodes laterally confined by ion implantation. Griebel, M.; Indlekofer, K.M.; Förster, A.; Lüth, H. JF - Journal of Physics D: Applied Physics. 32 (1999), H. 14 Y1 - 1999 SN - 1361-6463 SP - 1729 EP - 1733 ER - TY - JOUR A1 - Förster, Arnold A1 - Schmidt, T. A1 - Haug, R. J. T1 - Single-electron transport in small resonant-tunneling diodes with various barrier-thickness asymmetries / T. Schmidt ; R. J. Haug ; K. v. Klitzing ; A. Förster ... JF - Physical review / B, Condensed matter and materials physics. 55 (1997), H. 4 Y1 - 1997 SN - 1095-3795 SP - 2230 EP - 2236 ER - TY - JOUR A1 - Förster, Arnold A1 - Schmidt, T. A1 - Tewordt, M. T1 - Single-electron-tunneling spectroscopy of asymmetric laterally confined double-barrier heterostructures / T. Schmidt ; M. Tewordt ; R. J. Haug ... A. Förster ... JF - Solid state electronics. 40 (1996), H. 1-8 Y1 - 1996 SN - 0038-1101 SP - 15 EP - 19 ER - TY - JOUR A1 - Rath, V. A1 - Mottaghy, Darius T1 - Smooth inversion for ground surface temperature histories: estimating the optimum regularization parameter by generalized cross-validation JF - Geophysical Journal International Y1 - 2007 U6 - https://doi.org/10.1111/j.1365-246X.2007.03587.x SN - 1365-246X VL - 171 IS - 3 SP - 1440 EP - 1448 ER - TY - CHAP A1 - Steuer-Dankert, Linda A1 - Leicht-Scholten, Carmen T1 - Social responsibility and innovation - Key competencies for engineers T2 - ICERI 2016: 9th International Conference of Education, Research and Innovation: Conference Proceedings : Seville (Spain), 14-16 November N2 - Engineers are of particular importance for the societies of tomorrow. The big social challenges society has to cope with in future, can only be mastered, if engineers link the development and innovation process closely with the requirements of people. As a result, in the frame of the innovation process engineers have to design and develop products for diverse users. Therefore, the consideration of diversity in this process is a core competence engineers should have. Implementing the consideration of diverse requirements into product design is also linked to the development of sustainable products and thus leads to social responsible research and development, the core concept formulated by the EU. For this reason, future engineers should be educated to look at the technical perspectives of a problem embedded in the related questions within societies they are developing their artefacts for. As a result, the aim of teaching engineering should be to prepare engineers for these requirements and to draw attention to the diverse needs in a globalized world. To match the competence profiles of future engineers to the global challenges and the resulting social responsibility, RWTH Aachen University, one of the leading technical universities in Germany, has established the bridging professorship “Gender and Diversity in Engineering” (GDI) which educates engineers with an interdisciplinary approach to expand engineering limits. The interdisciplinary teaching concept of the research group pursues an approach which imparts an application oriented Gender and Diversity expertise to future engineers. In the frame of an established teaching concept, which is a result of experiences and expertise of the research group, students gain theoretical knowledge about Gender and Diversity and learn how to transfer their knowledge into their later field of action. In the frame of the conference the institutional approach will be presented as well as the teaching concept which will be introduced by concrete course examples. KW - diversity KW - innovation KW - social responsible engineering KW - engineering education Y1 - 2016 SN - 978-84-617-5895-1 U6 - https://doi.org/10.21125/iceri.2016.0353 SN - 2340-1095 SP - 5967 EP - 5976 ER - TY - GEN A1 - Nobisrath, Ulrich A1 - Zündorf, Albert A1 - George, Tobias A1 - Ruben, Jubeh A1 - Kraft, Bodo T1 - Software Stories Guide N2 - Software Stories are a simple graphical notation for requirements analysis and design in agile software projects. Software Stories are based on example scenarios. Example scenarios facilitate the communication between lay people or domain experts and software experts. Y1 - 2017 ER - TY - CHAP A1 - Michel, Philipp A1 - Rosin, Julia A1 - Butenweg, Christoph A1 - Klinkel, Sven T1 - Soil-dependent earthquake spectra in the analysis of liquid-storage-tanks on compliant soil T2 - Seismic design of industrial facilities 2020 N2 - A further development of the Added-Mass-Method allows the combined representation of the effects of both soil-structure-interaction and fluid-structure interaction on a liquid-filled-tank in one model. This results in a practical method for describing the dynamic fluid pressure on the tank shell during joint movement. The fluid pressure is calculated on the basis of the tank's eigenform and the earthquake acceleration and represented by additional masses on the shell. The bearing on compliant ground is represented by replacement springs, which are calculated dependent on the local soil composition. The influence of the shear modulus of the compliant soil is clearly visible in the pressure curves and the stress distribution in the shell. The acceleration spectra are also dependent on soil stiffness. According to Eurocode-8 the acceleration spectra are determined for fixed soil-classes, instead of calculating the accelerations for each site in direct dependence on the soil composition. This leads to unrealistic sudden changes in the system's response. Therefore, earthquake spectra are calculated for different soil models in direct dependence of the shear modulus. Thus, both the acceleration spectra and the replacement springs match the soil composition. This enables a reasonable and consistent calculation of the system response for the actual conditions at each site. Y1 - 2020 SN - 978-3-86359-729-0 N1 - 2nd International Conference on Seismic Design of Industrial Facilities (Aachen, Germany, March 4-5, 2020) SP - 245 EP - 254 PB - Apprimus Verlag CY - Aachen ER - TY - JOUR A1 - Schwarzer, Klemens A1 - Silva, Maria Eugênia Vieira da T1 - Solar cooking system with or without heat storage for families and institutions JF - Solar energy. 75 (2003), H. 1 Y1 - 2003 SN - 0038-092x N1 - 2. ISSN: 0375-9865 SP - 34 EP - 41 ER - TY - JOUR A1 - Schwarzer, Klemens A1 - Silva, Maria Eugênia Vieira da A1 - Faber, Christian A1 - Müller, Christoph T1 - Solar thermal desalination system with heat recovery JF - Desalination. 137 (2001), H. 1-3 Y1 - 2001 SN - 0011-9164 SP - 23 EP - 29 ER - TY - JOUR A1 - Schwarzer, Klemens A1 - Müller, C. A1 - Mertes, C. T1 - Solar thermal desalination systems with multi-layer heat recovery / C. Müller ; K. Schwarzer ; C. Mertes ... JF - Proceedings / organised by: ISES Europe ... [Ed.: Deutsche Gesellschaft für Sonnenenergie e.V. - DGS, Munich ; PSE GmbH - Forschung Entwicklung Marketing, Freiburg]. - Vol 1 Y1 - 2004 SN - 3-9809656-1-9 N1 - EuroSun <5, 2004, Freiburg, Breisgau> ; Internationales Sonnenforum <14, 2004, Freiburg, Breisgau> ; Deutsche Gesellschaft für Sonnenenergie ; CD-ROM-Ausg.: ISBN 3-9809656-4-3 SP - 1-647-1-652 PB - PSE CY - Freiburg [Breisgau] ER - TY - JOUR A1 - Alexopoulos, Spiros A1 - Hoffschmidt, Bernhard T1 - Solar tower power plant in Germany and future perspectives of the development of the technology in Greece and Cyprus JF - Renewable Energy . 35 (2010), H. 7 Y1 - 2010 SN - 0960-1481 SP - 1352 EP - 1356 ER - TY - JOUR A1 - Schwarzer, Klemens A1 - Müller, C. A1 - Vieira da Silva, E. T1 - Solare Meerwasser-Entsalzungsanlagen mit mehrstufiger Wärmerückgewinnung / C. Müller ; K. Schwarzer ; E. Vieira da Silva ... JF - 14. Symposium Thermische Solarenergie : 12. bis 14. Mai, 2004, Kloster Banz / [Veranst.: OTTI Energie-Kolleg] Y1 - 2004 SN - 3-934681-33-6 N1 - Symposium Thermische Solarenergie ; (14, 2004, Kloster Banz) ; Energie-Kolleg ; (Regensburg) ; OTTI-Symposium Thermische Solarenergie ; Parallel als CD-ROM-Ausg. ersch. SP - 154 EP - 159 PB - Ostbayerisches Technologie-Transfer-Institut CY - Regensburg ER - TY - CHAP A1 - Lo Piparo, G. B. A1 - Kern, Alexander A1 - Mazzetti, C. T1 - Some masterpoints about risk due to lightning T2 - International Conference on Lightning Protection (ICLP) : 2 - 7 Sept. 2012, Vienna Y1 - 2012 SN - 978-1-4673-1896-9 (E-Book) ; 978-1-4673-1898-3 (Print) SP - 1 EP - 6 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Förster, Arnold A1 - Kordos, P. A1 - Marso, M. T1 - Space-charge controlled conduction in low-temperature-grown molecular-beam epitaxial GaAs / P. Kordos ; M. Marso, ; A. Förster ... JF - Applied physics letters. 71 (1997), H. 8 Y1 - 1997 SN - 0003-6951 N1 - ISSN der E-Ausg.: 1077-3118 SP - 1118 EP - 1120 ER - TY - JOUR A1 - Vitusevich, S. A. A1 - Förster, Arnold A1 - Reetz, W. A1 - Lüth, H. A1 - Belyaev, A. E. A1 - Danylyuk, S. V. T1 - Spectral Responsivity of single-quantum-well photodetectors JF - Applied Physics Letters. 77 (2000), H. 1 Y1 - 2000 SN - 1077-3118 SP - 16 EP - 18 ER - TY - JOUR A1 - Förster, Arnold A1 - Schmidt, T. A1 - Haug, R. J. T1 - Spectroscopy of local density of states fluctuations in a disordered conductor / T. Schmidt ; R. J. Haug ; V. I. Fal'ko ... A. Förster ... JF - Europhysics letters. 36 (1996), H. 1 Y1 - 1996 SN - 1286-4854 SP - 61 EP - 66 ER - TY - JOUR A1 - Förster, Arnold A1 - Schmidt, T. A1 - Haug, R. J. T1 - Spectroscopy of the single-particle states of a quantum-dot molecule / T. Schmidt ; R. J. Haug ; K. v. Klitzing ; A. Förster ... JF - Physical review letters. 78 (1997), H. 8 Y1 - 1997 SN - 0031-9007 N1 - ISSN der E-Ausg.: 1079-7114 SP - 1544 EP - 1547 ER - TY - JOUR A1 - Förster, Arnold A1 - Hartmann, A. A1 - Dieker, Ch. A1 - Hollfelder, M. T1 - Spontaneous formation of tilted AlGaAS/GaAs superlattice during AlGaAs growth. Hartmann, A.; Dieker, Ch.; Hollfelder, M.; Hardtdegen, H.; Förster, A.; Lüth, H. JF - Applied Surface Science. 123-124 (1998) Y1 - 1998 SN - 0169-4332 N1 - = Proceedings of the Sixth International Conference on the Formation of Semiconductor Interfaces SP - 704 EP - 709 ER - TY - CHAP A1 - Goldbach, Daniel A1 - Ament, Christoph ED - Scharff, Peter T1 - Stabilized reversing with vehicle trailer combinations T2 - Crossing borders within the ABC : automation, biomedical engineering and computer science; proceedings; 55. IWK Internationales Wissenschaftliches Kolloquium; 13 - 17 September 2010, Ilmenau Y1 - 2010 SN - 978-3-938843-53-6 SP - 352 EP - 357 PB - Verl. ISLE CY - Ilmenau ER - TY - CHAP A1 - Meskouris, Konstantin A1 - Butenweg, Christoph A1 - Hinzen, Klaus-G. A1 - Höffer, Rüdiger T1 - Stochasticity of Wind Processes and Spectral Analysis of Structural Gust Response T2 - Structural Dynamics with Applications in Earthquake and Wind Engineering N2 - Wind loads have great impact on many engineering structures. Wind storms often cause irreparable damage to the buildings which are exposed to it. Along with the earthquakes, wind represents one of the most common environmental load on structures and is relevant for limit state design. Modern wind codes indicate calculation procedures allowing engineers to deal with structural systems, which are susceptible to conduct wind-excited oscillations. In the codes approximate formulas for wind buffeting are specified which relate the dynamic problem to rather abstract parameter functions. The complete theory behind is not visible in order to simplify the applicability of the procedures. This chapter derives the underlying basic relations of the spectral method for wind buffeting and explains the main important applications of it in order to elucidate part of the theoretical background of computations after the new codes. The stochasticity of the wind processes is addressed, and the analysis of analytical as well as measurement based power spectra is outlined. Short MATLAB codes are added to the Appendix 3 which carry out the computation of a single sided auto-spectrum from a statistically stationary, discrete stochastic process. Two examples are presented. KW - Wind turbulence KW - Gust wind response KW - Spectral analysis Y1 - 2019 SN - 978-3-662-57550-5 (Online) SN - 978-3-662-57548-2 (Print) U6 - https://doi.org/10.1007/978-3-662-57550-5_3 SP - 153 EP - 196 PB - Springer CY - Berlin ER - TY - JOUR A1 - Förster, Arnold A1 - Ohler, C. A1 - Moers, J. T1 - Strain dependence of the valence-band offset in arsenide compound heterojunctions determined by photoelectron spectroscopy / C. Ohler ; J. Moers ; A. Förster ... JF - Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures. 13 (1993), H. 4 Y1 - 1993 SN - 1071-1023 N1 - ISSN der E-Ausg.: 0734-211X SP - 1728 EP - 1735 ER - TY - JOUR A1 - Förster, Arnold A1 - Ohler, C. A1 - Kohleick, R. T1 - Strain dependence of the valence-band offset in InAs/GaAs heterojunctions determined by ultraviolet photoelectron spectroscopy / C. Ohler ; R. Kohleick ; A. Förster ... JF - Physical Review B . 50 (1994), H. 11 Y1 - 1994 SN - 0163-1829 N1 - 2. ISSN: 1098-0121 ; ISSN der E-Ausg.: 1095-3795 SP - 7833 EP - 7837 ER - TY - JOUR A1 - Förster, Arnold A1 - Rosenauer, A. A1 - Remmele, T. T1 - Strain determination in mismatched semiconductor heterostructures by the digital analysis of lattice images / A. Rosenauer ; T. Remmele ; U. Fischer ; A. Förster ... JF - Microscopy of semiconducting materials 1997 : proceedings of the Royal Microscopical Society Conference held at Oxford University, 7 - 10 April 1997 / ed. by A. G. Cullis ... - (Conference series / Institute of Physics ; 157) Y1 - 1997 SN - 0-7503-0464-2 N1 - MSM <10, 1997, Oxford> ; Conference on Microscopy of Semiconducting Materials <10, 1997, Oxford> ; Institut of Physics SP - 39 EP - ff. PB - Institute of Physics CY - Bristol [u.a.] ER - TY - JOUR A1 - Förster, Arnold A1 - Lentzen, M. A1 - Gerthsen, D. T1 - Strain relaxation of lattice-mismatched In0.2Ga0.8As/GaAs superlattices on GaAs(001) substrates / M. Lentzen ; D. Gerthsen ; A. Förster ... JF - Microscopy of semiconducting materials 1995 : proceedings of the Institute of Physics Conference held at Oxford University, 20 - 23 March 1995 / Ed. by A G Cullis ... - (Conference series / Institute of Physics ; 146) Y1 - 1995 SN - 0-7503-0347-6 N1 - MSM <9, 1995, Oxford> ; Institut of Physics SP - 357 EP - ff. PB - Institute of Physics CY - Bristol [u.a.] ER - TY - JOUR A1 - Rosenauer, A. A1 - Oberst, W. A1 - Litvinov, D. A1 - Gerthsen, D. A1 - Förster, Arnold A1 - Schmidt, R. T1 - Structural and Chemical Investigation of In-0.6Ga0.4As Stranski-Krastanow Layers Burried in GaAs by Transmission Electron Microscopy JF - Physical Review B. 61 (2000), H. 12 Y1 - 2000 SN - 1095-3795 SP - 8276 EP - 8288 ER - TY - BOOK A1 - Meskouris, Konstantin A1 - Butenweg, Christoph A1 - Hinzen, Klaus-G. A1 - Höffer, Rüdiger T1 - Structural Dynamics with Applications in Earthquake and Wind Engineering Y1 - 2019 SN - 978-3-662-57550-5 U6 - https://doi.org/10.1007/978-3-662-57550-5 PB - Springer CY - Berlin, Heidelberg ER - TY - JOUR A1 - Förster, Arnold A1 - Tillmann, K. A1 - Gerthsen, D. A1 - Pfundstein, P. T1 - Structural transformations and strain relaxation mechanisms of In0.6Ga0.4As islands grown by molecular beam epitaxy on GaAs(001) substrates / Tillmann, K. ; Gerthsen, D. ; Pfundstein, P. ; Förster, A. ; Urban, K. JF - Journal of applied physics. 78 (1995), H. 6 Y1 - 1995 SN - 0021-8979 SP - 3824 EP - 3832 ER - TY - JOUR A1 - Srnanek, R. A1 - Geurts, J. A1 - Lentze, M. A1 - Irmer, G. A1 - Donoval, D. A1 - Brdecka, P. A1 - Kordos, P. A1 - Förster, Arnold A1 - Sciana, B. A1 - Radziewicz, D. A1 - Tlaczala, M. T1 - Study of d-doped GaAs layers by micro-Raman spectroscopy on bevelled samples JF - Applied surface science . 230 (2004), H. 1 -4 Y1 - 2004 SN - 0169-4332 N1 - ISSN der E-Ausg.: 0169-4332 SP - 379 EP - 385 ER - TY - JOUR A1 - Srivastava, A. A1 - Lahiri, S. A1 - Maiti, M. A1 - Knolle, F. A1 - Hoyler, Friedrich A1 - Scherer, Ulrich W. A1 - Schnug, E. W. T1 - Study of naturally occurring radioactive material (NORM) in top soil of Punjab State from the North Western part of India JF - Journal of Radioanalytical and Nuclear Chemistry Y1 - 2014 U6 - https://doi.org/0.1007/s10967-014-3450-1 SN - 1588-2780 (E-Journal); 0022-4081 (Print); 0134-0719 (Print); 0236-5731 (Print); 1417-2097 (Print) VL - 2014 IS - 302 SP - 1049 EP - 1052 PB - Springer Nature CY - Basel ER - TY - JOUR A1 - Hoyler, Friedrich A1 - Prokofjevs, P. A1 - Bondarenko, V. T1 - Study of nuclear structure of 164Dy in (n, gamma) and(n, n' gamma) reactions / P. Prokofjevs ; V. Bondarenko ; F. Hoyler ... Y1 - 1997 SN - 1122-1437 N1 - Conference proceedings - Italian Physical Society SP - 759 ER - TY - JOUR A1 - Srivastava, A. A1 - Chahar, V. A1 - Sharma, V. A1 - Sun, Y. A1 - Bol, R. A1 - Knolle, F. A1 - Schnug, E. A1 - Hoyler, Friedrich A1 - Naskar, N. A1 - Lahiri, S. A1 - Patnaik, R. T1 - Study of uranium toxicity using low-background gamma-ray spectrometry JF - Journal of Radioanalytical and Nuclear Chemistry Y1 - 2017 U6 - https://doi.org/10.1007/s10967-017-5466-9 SN - 1588-2780 IS - Online first SP - 1 EP - 7 PB - Springer CY - Berlin ER - TY - JOUR A1 - Förster, Arnold A1 - Dekorsy, T. A1 - Kim, A. T. M. T1 - Subpicosecond coherent carrier-phonon dynamics in semiconductor heterostructures / T. Dekorsy ; A. M. T. Kim ; G. C. Cho ... A. Förster JF - Physical review / B, Condensed matter and materials physics. 53 (1996), H. 3 Y1 - 1996 SN - 1095-3795 SP - 1531 EP - 1538 ER - TY - JOUR A1 - Förster, Arnold A1 - Lachenmann, S. G. A1 - Friedrich, I. A1 - Uhlisch, D. T1 - Superconductor/semiconductor step junctions: the basic element for hybrid three terminal devices. Lachenmann, S. G., Förster, A.; Friedrich, I.; Uhlisch, D.; Schäpers, Th.; Kastalsky, A.; Golubov, A. A. JF - Applied Superconductivity. 6 (1999), H. 10-12 Y1 - 1999 SN - 0964-1807 SP - 681 EP - 688 ER - TY - JOUR A1 - Förster, Arnold A1 - Lachenmann, S. G. A1 - Fridrich, I. A1 - Schäpers, T. T1 - Supression of the surface-inversion layer of p-type InAs. Lachenmann, S. G.; Fridrich, I.; Förster, A.; Schäpers, Th. JF - Journal of Applied Physics. 85 (1999), H. 12 Y1 - 1999 SN - 1089-7550 SP - 8242 EP - 8246 ER - TY - JOUR A1 - Förster, Arnold A1 - Lüth, H. T1 - Surface reactions of trimethylgallium and trimethylarsenic on silicon surfaces JF - Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures. 7 (1989), H. 4 Y1 - 1989 SN - 1071-1023 N1 - ISSN der E-Ausg.: 0734-211X SP - 720 EP - 724 ER - TY - GEN A1 - Pier, Arnold A1 - Hummen, Jörg A1 - Stellberg, Michael T1 - Surgical clip applicator Y1 - 1996 ER - TY - JOUR A1 - Kern, Alexander A1 - Drumm, F. T1 - Survey of the lightning threat for aircraft based on natural lightning data and fixed in the German Standard DIN VG 95371 / Part 10 JF - Proceedings of the 1994 International Aerospace and Ground Conference on Lightning and Static Electricity : May 14 - 27, 1994, Bundesakademie für Wehrverwaltung und Wehrtechnik Mannheim ; final report / [conference chairman Jan Luiken TerHaseborg] Y1 - 1994 N1 - International Aerospace and Ground Conference on Lightning and Static Electricity <16, 1994, Mannheim> PB - Bundesakad. für Wehrverwaltung und Wehrtechnik CY - Mannheim ER - TY - CHAP A1 - Pieper, Martin A1 - Schulz, Silvia T1 - Teaching Simulation Methods with COMSOL Multiphysics N2 - This paper describes two courses on simulation methods for graduate students: “Simulation Methods” and “Simulation and Optimization in Virtual Engineering” The courses were planned to teach young engineers how to work with simulation software as well as to understand the necessary mathematical background. As simulation software COMSOL is used. The main philosophy was to combine theory and praxis in a way that motivates the students. In addition “soft skills” should be improved. This was achieved by project work as final examination. As underlying didactical principle the ideas of Bloom’s revised taxonomy were followed. The paper basically focusses on educational aspects, e.g. how to structure the course, plan the exercises, organize the project work and include practical COMSOL examples. KW - COMSOL Multiphysics KW - Optimization module KW - LiveLink for MATLAB KW - Bloom Taxonomy KW - education Y1 - 2014 ER - TY - CHAP A1 - Mahdi, Zahra A1 - Dersch, Jürgen A1 - Schmitz, Pascal A1 - Dieckmann, Simon A1 - Chico Caminos, Ricardo Alexander A1 - Teixeira Boura, Cristiano José A1 - Herrmann, Ulf A1 - Schwager, Christian A1 - Schmitz, Mark A1 - Gielen, Hans A1 - Gedle, Yibekal A1 - Büscher, Rauno T1 - Technical assessment of Brayton cycle heat pumps for the integration in hybrid PV-CSP power plants T2 - SOLARPACES 2020 N2 - The hybridization of Concentrated Solar Power (CSP) and Photovoltaics (PV) systems is a promising approach to reduce costs of solar power plants, while increasing dispatchability and flexibility of power generation. High temperature heat pumps (HT HP) can be utilized to boost the salt temperature in the thermal energy storage (TES) of a Parabolic Trough Collector (PTC) system from 385 °C up to 565 °C. A PV field can supply the power for the HT HP, thus effectively storing the PV power as thermal energy. Besides cost-efficiently storing energy from the PV field, the power block efficiency of the overall system is improved due to the higher steam parameters. This paper presents a technical assessment of Brayton cycle heat pumps to be integrated in hybrid PV-CSP power plants. As a first step, a theoretical analysis was carried out to find the most suitable working fluid. The analysis included the fluids Air, Argon (Ar), Nitrogen (N2) and Carbon dioxide (CO2). N2 has been chosen as the optimal working fluid for the system. After the selection of the ideal working medium, different concepts for the arrangement of a HT HP in a PV-CSP hybrid power plant were developed and simulated in EBSILON®Professional. The concepts were evaluated technically by comparing the number of components required, pressure losses and coefficient of performance (COP). KW - Solar thermal technologies KW - Hybrid energy system KW - Concentrated solar power KW - Power plants KW - Energy storage Y1 - 2022 SN - 978-0-7354-4195-8 U6 - https://doi.org/10.1063/5.0086269 SN - 1551-7616 (online) SN - 0094-243X (print) N1 - SOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems, 28 September–2 October 2020, Freiburg, Germany IS - 2445 / 1 PB - AIP conference proceedings / American Institute of Physics CY - Melville, NY ER - TY - JOUR A1 - Chudoba, Rostislav A1 - Butenweg, Christoph A1 - Peiffer, F. T1 - Technical information system for collaborative material research JF - Advances in engineering software Y1 - 2004 U6 - https://doi.org/10.1016/j.advengsoft.2004.03.021 SN - 1873-5339 (E-Journal); 0965-9978 (Print) VL - Volume 35 IS - Issue 10-11 SP - 747 EP - 756 ER - TY - JOUR A1 - Mottaghy, Darius A1 - Vosteen, Hans-Dieter A1 - Schellschmidt, Rüdiger T1 - Temperature dependence of the relationship of thermal diffusivity versus thermal conductivity for crystalline rocks JF - International Journal of Earth Sciences Y1 - 2008 U6 - https://doi.org/10.1007/s00531-007-0238-3 SN - 1437-3262 VL - 97 IS - 2 SP - 435 EP - 442 ER - TY - JOUR A1 - Geimer, Konstantin A1 - Sauerborn, Markus A1 - Hoffschmidt, Bernhard A1 - Schmitz, Mark A1 - Göttsche, Joachim T1 - Test Facility for Absorber Specimens of Solar Tower Power Plants JF - Advances in Science and Technology. 74 (2010) Y1 - 2010 N1 - 5th Forum on New Materials : CIMTEC 2010, Montecatini Terme, Italy 13-18 June 2010. Part C SP - 266 EP - 271 ER - TY - CHAP A1 - Chudoba, Rostislav A1 - Butenweg, Christoph A1 - Pfeiffer, Frank T1 - Textile reinforced concrete. Part I: Process model for collaborative research and development T2 - Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universität Weimar. Ed.: K. Gürlebeck; L. Hempel; C. Könke Y1 - 2003 SP - 1 EP - 8 PB - IKM CY - Weimar ER - TY - CHAP A1 - Konrad, M. A1 - Chudoba, Rostislav A1 - Butenweg, Christoph A1 - Bruckermann, O. T1 - Textile reinforced concrete. Part II: Multi-level modeling concept T2 - Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universität Weimar. Ed.: K. Gürlebeck; L. Hempel; C. Könke Y1 - 2003 SP - 1 EP - 11 PB - IKM CY - Weimar ER - TY - JOUR A1 - Hoyler, Friedrich A1 - Drissi, S. A1 - Tercier, P. A. T1 - The 112Cd laboratory - An extension : EO strengths, multiphonon states and coupled vibrations / S. Drissi ; P. A. Tercier ... F. Hoyler ... JF - Nuclear physics / A. 614 (1997), H. 2 Y1 - 1997 SN - 0375-9474 SP - 137 EP - 182 ER - TY - JOUR A1 - Förster, Arnold A1 - Spitzer, A. A1 - Lüth, H. T1 - The adsorption of fluor-carbon complexes on GaAs(110) studied by electron energy loss spectroscopy JF - Surface Science. 172 (1986), H. 1 Y1 - 1986 SN - 0039-6028 N1 - ISSN der E-Ausg.: 0039-6028 SP - 174 EP - 182 ER - TY - JOUR A1 - Kahmann, Stephanie L. A1 - Rausch, Valentin A1 - Plümer, Jonathan A1 - Müller, Lars P. A1 - Pieper, Martin A1 - Wegmann, Kilian T1 - The automized fracture edge detection and generation of three-dimensional fracture probability heat maps JF - Medical Engineering & Physics N2 - With proven impact of statistical fracture analysis on fracture classifications, it is desirable to minimize the manual work and to maximize repeatability of this approach. We address this with an algorithm that reduces the manual effort to segmentation, fragment identification and reduction. The fracture edge detection and heat map generation are performed automatically. With the same input, the algorithm always delivers the same output. The tool transforms one intact template consecutively onto each fractured specimen by linear least square optimization, detects the fragment edges in the template and then superimposes them to generate a fracture probability heat map. We hypothesized that the algorithm runs faster than the manual evaluation and with low (< 5 mm) deviation. We tested the hypothesis in 10 fractured proximal humeri and found that it performs with good accuracy (2.5 mm ± 2.4 mm averaged Euclidean distance) and speed (23 times faster). When applied to a distal humerus, a tibia plateau, and a scaphoid fracture, the run times were low (1–2 min), and the detected edges correct by visual judgement. In the geometrically complex acetabulum, at a run time of 78 min some outliers were considered acceptable. An automatically generated fracture probability heat map based on 50 proximal humerus fractures matches the areas of high risk of fracture reported in medical literature. Such automation of the fracture analysis method is advantageous and could be extended to reduce the manual effort even further. KW - Fracture classification KW - Shoulder KW - Probability distribution mapping KW - Morphing KW - Imaging Y1 - 2022 SN - 1350-4533 VL - 2022 IS - 110 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Hardt, Arno A1 - Martin, S. A1 - Meißburger, J. A1 - Retz, R. A1 - Wimmer, J. T1 - The cryopump system of the QQDDQ magnet spectrometer BIG KARL JF - Vacuum N2 - Cryopumps without liquid nitrogen shielding are used to provide a vacuum of 10−6 torr in the spectrometer. The vacuum system is subdivided in three sections that can be separated by valves. The first section (scattering chamber) has a volume of 60 l, two rotation transmissions with 35 cm dia and a sliding seal that allows a rotation of 160° without deteriorating the vacuum. The second section includes the vacuum chambers inside the magnets with 6 × 80 cm cross-section and a length of 1200 cm. The third section (detector box) has a volume of 4300 l and contains a moveable detector system. The gas inside the detector with a pressure of 760 torr is separated from the vacuum by a 15 μm mylar foil with an area of 300 cm2. The detector box can be valved off by a valve with the dimension of 10 × 100 cm. The layout of system is given. The instrumentation and the interlock system are described. First experiences with this system are presented. Y1 - 1978 U6 - https://doi.org/10.1016/S0042-207X(78)80026-8 SN - 1879-2715 (E-Journal); 0042-207X (Print) VL - 28 IS - 10-11 SP - 483 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Förster, Arnold A1 - Lange, J. A1 - Gerthsen, D. T1 - The effect of growth temperature on AlAs/GaAs resonant tunnelling diodes JF - Journal of Physics D: Applied Physics. 27 (1994), H. 1 Y1 - 1994 SN - 0022-3727 N1 - ISSN der E-Ausg.: 1361-6463 SP - 175 EP - 178 ER - TY - JOUR A1 - Förster, Arnold A1 - Layet, J. M. A1 - Lüth, H. T1 - The effect of inhomogeneous dopant profiles on the electron energy loss spectra of Si(100) / JF - Applied Physics A: Materials Science & Processing. 47 (1988), H. 1 Y1 - 1988 SN - 0947-8396 N1 - ISSN der E-Ausg.: 1432-0630 SP - 95 EP - 97 ER - TY - CHAP A1 - Anic, Filip A1 - Penava, Davorin A1 - Guljas, Ivica A1 - Sarhosis, Vasilis A1 - Abrahamczyk, Lars A1 - Butenweg, Christoph T1 - The Effect of Openings on Out-of-Plane Capacity of Masonry Infilled Reinforced Concrete Frames T2 - 16th European Conference on Earthquake Engineering, Thessaloniki, 18-21 June, 2018 Y1 - 2018 N1 - Paper No 10168 SP - 1 EP - 11 ER - TY - JOUR A1 - Kern, Alexander A1 - Zischank, Wolfgang J. T1 - The effect of parallel wires on the longitudinal voltage drop along shielded cables JF - Conference proceedings : 21st International Conference on Lightning Protection, Berlin Congress Center (BCC) Germany, September 22 - 25, 1992 = 21. Internationale Blitzschutzkonferenz / [proceedings ed. staff: J. Pilling ...] Y1 - 1992 SN - 3-8007-1885-5 N1 - International Conference on Lightning Protection <21, 1992, Berlin> ; ICLP <21, 1992, Berlin> PB - VDE-Verl. CY - Berlin [u.a.] ER - TY - CHAP A1 - Dören, Horst-Peter T1 - The examination of surfaces of cold rolled wire for gas-shielded arc-welding T2 - WAI/BISPA joint conference : proceedings. Joint conference of Wire Association International and the British Independent Steel Producers Association (WAI/BISPA) : 26 - 27. 09. 1988, Stratford-upon-Avon Y1 - 1988 SP - 102 EP - 112 CY - Guilford, Conn. ER - TY - JOUR A1 - Mottaghy, Darius A1 - Pechnig, Renate A1 - Vogt, Christian T1 - The geothermal project Den Haag: 3D numerical models for temperature prediction and reservoir simulation JF - Geothermics N2 - The proposed Den Haag Zuidwest district heating system of the city of The Hague consists of a deep doublet in a Jurassic sandstone layer that is designed for a production temperature of 75 °C and a reinjection temperature of 40 °C at a flow rate of 150 m3 h−1. The prediction of reservoir temperature and production behavior is crucial for success of the proposed geothermal doublet. This work presents the results of a study of the important geothermal and geohydrological issues for the doublet design. In the first phase of the study, the influences of the three-dimensional (3D) structures of anticlines and synclines on the temperature field were examined. A comprehensive petrophysical investigation was performed to build a large scale 3D-model of the reservoir. Several bottomhole temperatures (BHTs), as well as petrophysical logs were used to calibrate the model using thermal conductivity measurements on 50 samples from boreholes in different lithological units in the study area. Profiles and cross sections extracted from the calculated temperature field were used to study the temperature in the surrounding areas of the planned doublet. In the second phase of the project, a detailed 3D numerical reservoir model was set up, with the aim of predicting the evolution of the producer and injector temperatures, and the extent of the cooled area around the injector. The temperature model from the first phase provided the boundary conditions for the reservoir model. Hydraulic parameters for the target horizons, such as porosity and permeability, were taken from data available from the nearby exploration wells. The simulation results are encouraging as no significant thermal breakthrough is predicted. For the originally planned location of the producer, the extracted water temperature is predicted to be around 79 °C, with an almost negligible cooling in the first 50 years of production. When the producer is located shallower parts of the reservoir, the yield water temperatures is lower, starting at ≈76 °C and decreasing to ≈74 °C after 50 years of operation. This comparatively larger decrease in temperature with time is caused by the structural feature of the reservoir, namely a higher dip causes the cooler water to easily move downward. In view of the poor reservoir data, the reservoir simulation model is constructed to allow iterative updates using data assimilation during planned drilling, testing, and production phases. Measurements during an 8 h pumping test carried out in late 2010 suggest that a flow rate of 150 m3 h−1 is achievable. Fluid temperatures of 76.5 °C were measured, which is very close to the predicted value. Y1 - 2011 U6 - https://doi.org/10.1016/j.geothermics.2011.07.001 SN - 0375-6505 VL - 40 IS - 3 SP - 199 EP - 210 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Kern, Alexander T1 - The heating of metal sheets caused by direct lightning strikes-model and measurement JF - 20th ICPL / International Conference on Lightning Protection, Congress-Center Casino Interlaken, Switzerland, September 24-28, 1990 = Internationale Blitzschutzkonferenz, Congress-Center Casino Interlaken, Schweiz, 24.-28. September 1990 Y1 - 1990 N1 - International Conference on Lightning Protection <20, 1990, Interlaken> ; Internationale Blitzschutzkonferenz <20, 1990, Interlaken> PB - Schweizerischer Elektrotechnischer Verein CY - [Zürich] ER - TY - CHAP A1 - Haissig, M. A1 - Dören, Horst-Peter A1 - Stadler, P. T1 - The horizontal continuous casting process of steel - a contribution to the economic production of unalloyed, alloyed and high alloyed steel T2 - VOEST-Alpine Continuous Casting Conference : 12.-15. 10.1981, Johannes-Keppler-Universität Linz Y1 - 1981 SP - Vortrag 21 CY - Linz ER -