TY  - JOUR
A1  - Fleischhaker, Robert
A1  - Evers, Jörg
T1  - A Maxwell–Schrödinger solver for quantum optical few-level systems
JF  - Computer Physics Communications
N2  - The msprop program presented in this work is capable of solving the Maxwell–Schrödinger equations for one or several laser fields propagating through a medium of quantum optical few-level systems in one spatial dimension and in time. In particular, it allows to numerically treat systems in which a laser field interacts with the medium with both its electric and magnetic component at the same time. The internal dynamics of the few-level system is modeled by a quantum optical master equation which includes coherent processes due to optical transitions driven by the laser fields as well as incoherent processes due to decay and dephasing. The propagation dynamics of the laser fields is treated in slowly varying envelope approximation resulting in a first order wave equation for each laser field envelope function. The program employs an Adams predictor formula second order in time to integrate the quantum optical master equation and a Lax–Wendroff scheme second order in space and time to evolve the wave equations for the fields. The source function in the Lax–Wendroff scheme is specifically adapted to allow taking into account the simultaneous coupling of a laser field to the polarization and the magnetization of the medium. To reduce execution time, a customized data structure is implemented and explained. In three examples the features of the program are demonstrated and the treatment of a system with a phase-dependent cross coupling of the electric and magnetic field component of a laser field is shown.
Y1  - 2011
U6  - http://dx.doi.org/10.1016/j.cpc.2010.10.018
SN  - 0010-4655
VL  - 182
IS  - 3
SP  - 739
EP  - 747
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Fleischhaker, Robert
A1  - Evers, Jörg
T1  - Nonlinear effects in pulse propagation through Doppler-broadened closed-loop atomic media
JF  - Physical Review A - Atomic, molecular, and optical physics
Y1  - 2008
U6  - http://dx.doi.org/10.1103/PhysRevA.77.043805
SN  - 1050-2947
VL  - 77
IS  - 4
SP  - 043805
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  - http://dx.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  - 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  - http://dx.doi.org/10.1007/978-3-658-02810-7_36
SP  - 429
EP  - 440
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - CHAP
A1  - Edip, Kemal
A1  - Garevski, Mihail
A1  - Butenweg, Christoph
A1  - Sesov, Vlatko
A1  - Bojadjieva, Julijana
A1  - Gjorgjiev, Igor
T1  - Boundary effects on seismic analysis of multi-storey frames considering soil structure interaction phenomenon
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  - 978-3-658-02809-1 (Print) ; 978-3-658-02810-7
U6  - http://dx.doi.org/10.1007/978-3-658-02810-7_47
SP  - 569
EP  - 576
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - CHAP
A1  - Giresini, Linda
A1  - Butenweg, Christoph
A1  - Andreini, M.
A1  - De Falco, A.
A1  - Sassu, M.
T1  - Numerical calibration of a macro-element for vaultes system in historic churches
T2  - 9th International Conference on Structural Analyses of Historical Conctruction, 14 - 17 October, 2014, Mexico City
Y1  - 2014
SP  - 1
EP  - 12
ER  - 
TY  - CHAP
A1  - Giresini, Linda
A1  - Butenweg, Christoph
A1  - Andreini, M.
A1  - De Falco, A.
A1  - Sassu, M.
T1  - Macro-elements identification in historic chapels: the case of St. Venerio Chapel in Reggiolo - Emilia Romagna
T2  - 9th International Conference on Structural Analyses of Historical Conctruction, 14 - 17 October, 2014, Mexico City
Y1  - 2014
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  - JOUR
A1  - Fleischhaker, Robert
A1  - Evers, Jörg
T1  - Four-wave mixing enhanced white-light cavity
JF  - Physical Review A - Atomic, molecular, and optical physics
Y1  - 2008
SN  - 0556-2791
VL  - 78
IS  - 5
SP  - 051802(R)
ER  - 
TY  - THES
A1  - Fleischhaker, Robert
T1  - Light propagation in dense and chiral media
Y1  - 2009
N1  - Heidelberg, Univ., Diss., 2009
ER  - 
TY  - CHAP
A1  - Evers, Jörg
A1  - Fleischhaker, Robert
A1  - Pálffy, A.
A1  - Keitel, C.
T1  - Light propagation : From atomic to nuclear quantum optics
T2  - Modern optics and photonics: atoms and structured media
Y1  - 2010
SN  - 978-981431327-8
U6  - http://dx.doi.org/10.1142/9789814313278_0001
SP  - 3
EP  - 15
PB  - World Scientific Publishing Co.
ER  - 
TY  - CHAP
A1  - Park, Jin
A1  - El-Daib, Khaled
A1  - Butenweg, Christoph
A1  - Gellert, Christoph
T1  - A novel macroelement approach for masonry walls
T2  - Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 : Leuven, Belgium, 4 - 6 July 2011 / Katholieke Universiteit Leuven, ... G. De Roeck ... (eds)
Y1  - 2011
SN  - 978-90-76019-31-4
SP  - 3281
EP  - 3286
PB  - K. U. Leuven, Dep. of Civil Engineering
CY  - Leuven
ER  - 
TY  - CHAP
A1  - Reindl, Lukas
A1  - Butenweg, Christoph
A1  - Kubalski, Thomas
T1  - Numerical simulation of unreinforced masonry walls subject to dynamic out-of-plane loading
T2  - COMPDYN 2011 : ECCOMAS Thematic Conference ; Proceedings of the 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering ; 25-28 May, 2011, Corfu, Greece / Eds.: M. Papadrakakis ...
Y1  - 2011
SN  - 978-960-99994-0-3
SP  - 1
EP  - 10
PB  - National Technical Univ. of Athens
CY  - Athen
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  - Taddei, Francesca
A1  - Reindl, Lukas
A1  - Park, Jin
A1  - Butenweg, Christoph
A1  - Karadogan, Faruk
T1  - Numerical investigation of AAC wall panels based on the damage plasticity constitutive law
T2  - Cement, Wapno, Beton ; 2011, 7, Special issue: 5th International Conference on Autoclaved Aerated Concrete 'Securing a sustainable future' to be held at Bydgoszcz to celebrate 60 years of AAC experience in Poland, Bydgoszcz, September 14-17, 2011
Y1  - 2011
SN  - 1425-8129
SP  - 86
EP  - 91
PB  - Stowarzyszenie Producentów Cementu i Wapna
CY  - Krakow
ER  - 
TY  - CHAP
A1  - Höfler, M.
A1  - Kneer, R.
A1  - Groß, Rolf Fritz
A1  - Kehrmann, K.
ED  - Vorobieff, P.
T1  - Chemical determination of oxygen transfer rates, transfer efficiencies and interphases evoked by aeration elements for liquid flows
T2  - Computational Methods in Multiphase Flow VIII. - (WIT Transactions on Engineering Sciences ;  Volume 89)
Y1  - 2015
SN  - 978-1-84564-946-3 (Print-Ausgabe)
SN  - 978-1-84564-947-0 (Online-Ausgabe)
SN  - 1746-4471
SP  - 89
EP  - 101
PB  - WIT Press
CY  - Southampton
ER  - 
TY  - JOUR
A1  - Jablonowski, Nicolai David
A1  - Kollmann, Tobias
A1  - Nabel, Moritz
A1  - Damm, Tatjana
A1  - Klose, Holger
A1  - Müller, Michael
A1  - Bläsing, Marc
A1  - Seebold, Sören
A1  - Krafft, Simone
A1  - Kuperjans, Isabel
A1  - Dahmen, Markus
A1  - Schurr, Ulrich
T1  - Valorization of Sida (Sida hermaphrodita) biomass for multiple energy purposes
JF  - GCB [Global Change Biology] Bioenergy
N2  - The performance and biomass yield of the perennial energy plant Sida hermaphrodita (hereafter referred to as Sida) as a feedstock for biogas and solid fuel was evaluated throughout one entire growing period at agricultural field conditions. A Sida plant development code was established to allow comparison of the plant growth stages and biomass composition. Four scenarios were evaluated to determine the use of Sida biomass with regard to plant development and harvest time: (i) one harvest for solid fuel only; (ii) one harvest for biogas production only; (iii) one harvest for biogas production, followed by a harvest of the regrown biomass for solid fuel; and (iv) two consecutive harvests for biogas production. To determine Sida's value as a feedstock for combustion, we assessed the caloric value, the ash quality, and melting point with regard to DIN EN ISO norms. The results showed highest total dry biomass yields of max. 25 t ha⁻¹, whereas the highest dry matter of 70% to 80% was obtained at the end of the growing period. Scenario (i) clearly indicated the highest energy recovery, accounting for 439 288 MJ ha⁻¹; the energy recovery of the four scenarios from highest to lowest followed this order: (i) ≫ (iii) ≫ (iv) > (ii). Analysis of the Sida ashes showed a high melting point of >1500 °C, associated with a net calorific value of 16.5–17.2 MJ kg⁻¹. All prerequisites for DIN EN ISO norms were achieved, indicating Sida's advantage as a solid energy carrier without any post-treatment after harvesting. Cell wall analysis of the stems showed a constant lignin content after sampling week 16 (July), whereas cellulose had already reached a plateau in sampling week 4 (April). The results highlight Sida as a promising woody, perennial plant, providing biomass for flexible and multipurpose energy applications.
Y1  - 2016
U6  - http://dx.doi.org/10.1111/gcbb.12346
SN  - 1757-1707 (online)
SN  - 1757-1693 (print)
N1  - Special Issue: Perennial biomass crops for a resource constrained world
VL  - 9
IS  - 1
SP  - 202
EP  - 214
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
T1  - Advances in solar tower technology
JF  - Wiley interdisciplinary reviews : Energy and Environment : WIREs
Y1  - 2017
U6  - http://dx.doi.org/10.1002/wene.217
SN  - 2041-840X
VL  - 6
IS  - 1
SP  - 1
EP  - 19
PB  - Wiley
CY  - Weinheim
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  - http://dx.doi.org/10.1007/s10967-017-5466-9
SN  - 1588-2780
IS  - Online first
SP  - 1
EP  - 7
PB  - Springer
CY  - Berlin
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  -