TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Cata-Danil, G.
A1  - Guazzoni, P.
T1  - (p,t) transition strengths for nuclei around Z = 50 and the IBA model / G. Cata-Danil ; P. Guazzoni ... F. Hoyler ...
JF  - Journal of physics / G. 22 (1996), H. 1
Y1  - 1996
SN  - 0305-4616
SP  - 107
EP  - 114
ER  - 
TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Colvin, G. G.
A1  - Robinson, S. J.
T1  - 100Ru studied by thermal neutron capture / G. G. Colvin ; S. J. Robinson ; F. Hoyler
JF  - Journal of Physics G. 14 (1988), H. 11
Y1  - 1988
SN  - 0305-4616
SP  - 1411
EP  - 1421
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Kordos, P.
A1  - Marso, M.
A1  - Rüders, F.
T1  - 550 GHz bandwidth photodetector on low-temperature grown molecular-beam epitaxial GaAs.  Kordos, P., Förster, A.; Marso, M.; Rüders, F.
JF  - Electronics Letters. 34 (1998), H. 1
Y1  - 1998
SN  - 1350-911X
SP  - 119
EP  - 120
ER  - 
TY  - JOUR
A1  - Breitbach, Gerd
A1  - Schubert, F.
T1  - A contribution to stress prediction in coatings for gas turbine blades
JF  - Archive of applied mechanics. 73 (2004), H. 9-10
Y1  - 2004
SN  - 0939-1533
N1  - 2. ISSN (Druck-Ausg.): 1432-0681
SP  - 682
EP  - 689
ER  - 
TY  - JOUR
A1  - Gerling, Ulrich
A1  - Pool, M. J.
A1  - Predel, Bruno
T1  - A contribution to the associate model for binary liquid alloys = Ein Beitrag zum Assoziat-Modell für binäre flüssige Legierungen
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 74, H. 9
Y1  - 1983
SN  - 0044-3093 ; 0179-4841
SP  - 616
EP  - 619
ER  - 
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  - Hoyler, Friedrich
A1  - Andrejtscheff, W.
A1  - Petkov, P.
T1  - A mixed symmetry or quasineutron pair interpretation of the Kpi =03+ level in 172Yb / W. Andrejtscheff ; P. Petkov ... F. Hoyler
JF  - Journal of physics / G. 12 (1986), H. 6
Y1  - 1986
SN  - 0305-4616
SP  - L151
EP  - L156
ER  - 
TY  - JOUR
A1  - Gömmel, Andreas
A1  - Butenweg, Christoph
A1  - Bolender, Katrin
A1  - Grunendahl, Arno
T1  - A muscle controlled finite-element model of laryngeal abduction and adduction
JF  - Computer methods in biomechanics and biomedical engineering
Y1  - 2007
SN  - 1476-8259 (E-Journal); 1025-5842 (Print)
VL  - Volume 10
IS  - Issue 5
SP  - 377
EP  - 388
ER  - 
TY  - JOUR
A1  - Hoffschmidt, Bernhard
A1  - Pitz-Paal, Robert
A1  - Böhmer, M.
T1  - A new closed/open volumetric receiver concept for parabolictrough collectors (test results)
JF  - Journal de physique. 9 (1999), H. 3
Y1  - 1999
SN  - 1155-4339
SP  - 3
ER  - 
TY  - JOUR
A1  - Kürten, Sylvia
A1  - Mottaghy, Darius
A1  - Ziegler, Martin
T1  - A new model for the description of the heat transfer for plane thermo-active geotechnical systems based on thermal resistances
JF  - Acta Geotechnica
Y1  - 2015
U6  - http://dx.doi.org/10.1007/s11440-014-0311-6
SN  - 1861-1133
VL  - 10
IS  - 2
SP  - 219
EP  - 229
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Schwarzer, Klemens
A1  - da Silva, Vieira E.
A1  - Hoffschmidt, Bernhard
A1  - Schwarzer, T.
T1  - A new solar desalination system with heat recovery for decentralised drinking water production
JF  - Desalination. 248 (2009), H. 1-3
Y1  - 2009
SN  - 0011-9164
N1  - Water and Sanitation in International Development and Disaster Relief (WSIDDR) International Workshop Edinburgh, Scotland, UK, 28–30 May 2008
SP  - 204
EP  - 211
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Chen, Tao
A1  - Clauser, Christoph
A1  - Marquart, Gabriele
A1  - Willbrand, Karen
A1  - Mottaghy, Darius
T1  - A new upscaling method for fractured porous media
JF  - Advances in Water Resources
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.advwatres.2015.03.009
SN  - 0309-1708
N1  - Corrigendum 2019:
https://doi.org/10.1016/j.advwatres.2019.01.004
VL  - 80
SP  - 60
EP  - 68
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hodel, U.
A1  - Orzati, A.
A1  - Marso, M.
A1  - Homann, O.
A1  - Fox, A.
A1  - Hart, A. v. d.
A1  - Förster, Arnold
A1  - Kordos, P.
A1  - Lüth, H.
T1  - A novel InAlAs/InGaAs layer structure for monolithically integrated photoreceiver
JF  - Conference Proceedings: 2000 International Conference on Indium Phosphide and related materials
Y1  - 2000
SN  - 0-7803-6320-5
N1  - International Conference on Indium Phosphide and Related Materials <12, 2000, Williamsburg, Va.>
SP  - 466
EP  - 469
PB  - IEEE Service Center
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Collins, S. P.
A1  - Eid, S. A.
T1  - A search for mixed-symmetry states in the mass A approximately 50 region / S. P. Collins ; S. A. Eid ... F. Hoyler
JF  - Journal of Physics G. 15 (1989), H. 3
Y1  - 1989
SN  - 0954-3899
SP  - 321
EP  - 332
ER  - 
TY  - JOUR
A1  - Pieper, Martin
A1  - Klein, Peter
T1  - A simple and accurate numerical network flow model for bionic micro heat exchangers
JF  - Heat mass transfer
Y1  - 2011
SN  - 0947-7411
VL  - 47
IS  - 5
SP  - 491
EP  - 503
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Hardt, Arno
A1  - Köhler, M.
A1  - Müller, K. D.
A1  - Stoff, H.
T1  - A two-dimensional position sensitive charged-particle detector for the magnetic spectrograph "BIG KARL" of the Jülich Cyclotron "JULIC". M. Köhler, K. D. Müller, H. Stoff, M. Teske, G. P. A. Berg, A. Hardt, S. Martin, C. Mayer-Böricke ,  J. Meißburger
JF  - Nuclear Instruments and Methods. 75 (1980), H. 2-3
Y1  - 1980
SN  - 0029-554X
SP  - 357
EP  - 362
ER  - 
TY  - JOUR
A1  - Stock, J.
A1  - Malindretos, J.
A1  - Indlekofer, K.M.
A1  - Pöttgens, Michael
A1  - Förster, Arnold
A1  - Lüth, Hans
T1  - A Vertical Resonant Tunneling Transistor for Application in Digital Logic Circuits
JF  - IEEE Transactions on Electron Devices (T-ED). 48 (2001), H. 6
Y1  - 2001
SN  - 0018-9383
SP  - 1028
EP  - 1032
ER  - 
TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Petkov, P.
A1  - Andrejtscheff, W.
T1  - Absolute E0, E1 and E2 transition rates in even-even nuclei obtained in thermal neutron capture  / P. Petkov ; W. Andrejtscheff ... F. Hoyler ...
JF  - Journal of Physics G. 14 (1988), H. S
Y1  - 1988
SN  - 0305-4616
SP  - S97
EP  - S102
ER  - 
TY  - JOUR
A1  - Schwager, Christian
A1  - Flesch, Robert
A1  - Schwarzbözl, Peter
A1  - Herrmann, Ulf
A1  - Teixeira Boura, Cristiano José
T1  - Advanced two phase flow model for transient molten salt receiver system simulation
JF  - Solar Energy
N2  - In order to realistically predict and optimize the actual performance of a concentrating solar power (CSP) plant sophisticated simulation models and methods are required. This paper presents a detailed dynamic simulation model for a Molten Salt Solar Tower (MST) system, which is capable of simulating transient operation including detailed startup and shutdown procedures including drainage and refill. For appropriate representation of the transient behavior of the receiver as well as replication of local bulk and surface temperatures a discretized receiver model based on a novel homogeneous two-phase (2P) flow modelling approach is implemented in Modelica Dymola®. This allows for reasonable representation of the very different hydraulic and thermal properties of molten salt versus air as well as the transition between both. This dynamic 2P receiver model is embedded in a comprehensive one-dimensional model of a commercial scale MST system and coupled with a transient receiver flux density distribution from raytracing based heliostat field simulation. This enables for detailed process prediction with reasonable computational effort, while providing data such as local salt film and wall temperatures, realistic control behavior as well as net performance of the overall system. Besides a model description, this paper presents some results of a validation as well as the simulation of a complete startup procedure. Finally, a study on numerical simulation performance and grid dependencies is presented and discussed.
KW  - Molten salt solar tower
KW  - Molten salt receiver system
KW  - Dynamic simulation
KW  - Two-phase modelling
KW  - Transient flux distribution
Y1  - 2022
U6  - http://dx.doi.org/10.1016/j.solener.2021.12.065
SN  - 0038-092X (print)
SN  - 1471-1257 (online)
VL  - 232
SP  - 362
EP  - 375
PB  - Elsevier
CY  - Amsterdam
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  - Walther, T.
A1  - Gerthsen, D.
A1  - Carius, Reinhard
A1  - Förster, Arnold
T1  - AlAs/GaAs Quantum well structures: Interface properties investigated by high-resolution transmission electron microscopy and photoluminescence spectroscopy / T. Walther ; D. Gerthsen ; R. Carius ; A. Förster ...
JF  - Microscopy of semiconducting materials 1993 : proceedings of the Royal Microscopical Society Conference held at Oxford University, 5 - 8 April 1993 / ed. by A. G. Cullis ... - (Conference series / Institute of Physics ; 134)
Y1  - 1993
SN  - 0-7503-0290-9
N1  - Royal Microscopical Society Conference on Microscopy of Semiconducting Materials <8, 1993, Oxford> ; MSM <8, 1993, Oxford>
SP  - 449
EP  - ff.
PB  - Institute of Physics
CY  - Bristol [u.a.]
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Lauter, J.
A1  - Lüth, H.
T1  - AlGaAs/GaAs avalanche detector array -1 GBit/s X-ray receiver for timing measurements / J. Lauter ; A. Förster ; H. Lüth ...
JF  - 1995 IEEE conference record : October 21 - 28, 1995, San Francisco / Patricia A. Moonier, guest ed. - Vol. 1
Y1  - 1996
SN  - 0-7803-3180-X
N1  - Nuclear Science Symposium <1995, San Francisco, Calif.> ; Medical Imaging Conference <1995, San Francisco, Calif.> ; IEEE catalog number: 95CH35898
SP  - 579
EP  - ff.
PB  - IEEE Service Center
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Lauter, J.
A1  - Lüth, H.
T1  - AlGaAs/GaAs avalanche detector array-1 GBit/s X-ray receiver fortiming measurements / J. Lauter ; A. Förster ; H. Lüth ...
JF  - IEEE Transactions on Nuclear Science (T-NS). 43 (1996), H. 3, Part 2
Y1  - 1996
SN  - 0018-9499
SP  - 1446
EP  - 1451
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Lauter, J.
A1  - Protic, D.
A1  - Lüth, H.
T1  - AlGaAs/GaAs SAM-avalanche photodiode : an X-ray detector for low energy photons / J. Lauter ;  D. Protic ; A. Förster ; H. Lüth
JF  - Nuclear instruments and methods in physics research section A: Accelerators, spectrometers, detectors and associated equipment. 356 (1995), H. 2-3
Y1  - 1995
SN  - 0168-9002
SP  - 324
EP  - 329
ER  - 
TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Mohr, P.
A1  - Staudt, G.
T1  - Alpha-cluster states of 212po in a realistic potential model
JF  - Physical review / C. 50 (1994), H. 5
Y1  - 1994
SN  - 0556-2813
SP  - 2631
EP  - 2634
ER  - 
TY  - JOUR
A1  - Fischer, W. A.
A1  - Dören, Horst-Peter
A1  - Janke, Dieter
T1  - Aluminium nitride probes for application in iron melts
JF  - Archiv für das Eisenhüttenwesen. 52 (1981), H. 3
Y1  - 1981
SN  - 0003-8962
SP  - 91
EP  - 98
ER  - 
TY  - JOUR
A1  - Lück, Reinhard
A1  - Gerling, Ulrich
A1  - Predel, Bruno
T1  - An entropy paradox of the association model
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 80, H. 4
Y1  - 1989
SN  - 0044-3093 ; 0179-4841
SP  - 270
EP  - 275
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Marso, M.
A1  - Gersdorf, P.
A1  - Fox, A.
T1  - An InAlAs-InGaAs OPFET with responsivity above 200 A/W at 1.3-&#956;m wavelength. Marso, M.; Gersdorf, P.; Fox, A.; Hodel, U.; Lambertini, R.; Kordos, P.
JF  - IEEE Photonics Technology Letters. 11 (1999), H. 1
Y1  - 1999
SN  - 1041-1135
SP  - 117
EP  - 119
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Verghese, S.
A1  - Zamdmer, N.
A1  - Hu, Qing
T1  - An optical correlator using a low-temperature-grown GaAs photoconductor / S. Verghese ; N. Zamdmer ; Qing Hu .... A. Förster
JF  - Applied physics letters. 69 (1996), H. 6
Y1  - 1996
SN  - 0003-6951
N1  - ISSN der E-Ausg.: 1077-3118
SP  - 842
EP  - 844
ER  - 
TY  - JOUR
A1  - Cheenakula, Dheeraja
A1  - Hoffstadt, Kevin
A1  - Krafft, Simone
A1  - Reinecke, Diana
A1  - Klose, Holger
A1  - Kuperjans, Isabel
A1  - Grömping, Markus
T1  - Anaerobic digestion of algal–bacterial biomass of an Algal Turf Scrubber system
JF  - Biomass Conversion and Biorefinery
N2  - This study investigated the anaerobic digestion of an algal–bacterial biofilm grown in artificial wastewater in an Algal Turf Scrubber (ATS). The ATS system was located in a greenhouse (50°54′19ʺN, 6°24′55ʺE, Germany) and was exposed to seasonal conditions during the experiment period. The methane (CH4) potential of untreated algal–bacterial biofilm (UAB) and thermally pretreated biofilm (PAB) using different microbial inocula was determined by anaerobic batch fermentation. Methane productivity of UAB differed significantly between microbial inocula of digested wastepaper, a mixture of manure and maize silage, anaerobic sewage sludge, and percolated green waste. UAB using sewage sludge as inoculum showed the highest methane productivity. The share of methane in biogas was dependent on inoculum. Using PAB, a strong positive impact on methane productivity was identified for the digested wastepaper (116.4%) and a mixture of manure and maize silage (107.4%) inocula. By contrast, the methane yield was significantly reduced for the digested anaerobic sewage sludge (50.6%) and percolated green waste (43.5%) inocula. To further evaluate the potential of algal–bacterial biofilm for biogas production in wastewater treatment and biogas plants in a circular bioeconomy, scale-up calculations were conducted. It was found that a 0.116 km2 ATS would be required in an average municipal wastewater treatment plant which can be viewed as problematic in terms of space consumption. However, a substantial amount of energy surplus (4.7–12.5 MWh a−1) can be gained through the addition of algal–bacterial biomass to the anaerobic digester of a municipal wastewater treatment plant. Wastewater treatment and subsequent energy production through algae show dominancy over conventional technologies.
KW  - Biogas
KW  - Methane
KW  - Algal Turf Scrubber
KW  - Algal–bacterial bioflm
KW  - Circular bioeconomy
Y1  - 2022
U6  - http://dx.doi.org/10.1007/s13399-022-03236-z
SN  - 2190-6823
N1  - Corresponding author: Dheeraja Cheenakula
VL  - 13
SP  - 15 Seiten
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Maurer, Florian
A1  - Rieke, Christian
A1  - Schemm, Ralf
A1  - Stollenwerk, Dominik
T1  - Analysis of an urban grid with high photovoltaic and e-mobility penetration
JF  - Energies
N2  - This study analyses the expected utilization of an urban distribution grid under high penetration of photovoltaic and e-mobility with charging infrastructure on a residential level. The grid utilization and the corresponding power flow are evaluated, while varying the control strategies and photovoltaic installed capacity in different scenarios. Four scenarios are used to analyze the impact of e-mobility. The individual mobility demand is modelled based on the largest German studies on mobility “Mobilität in Deutschland”, which is carried out every 5 years. To estimate the ramp-up of photovoltaic generation, a potential analysis of the roof surfaces in the supply area is carried out via an evaluation of an open solar potential study. The photovoltaic feed-in time series is derived individually for each installed system in a resolution of 15 min. The residential consumption is estimated using historical smart meter data, which are collected in London between 2012 and 2014. For a realistic charging demand, each residential household decides daily on the state of charge if their vehicle requires to be charged. The resulting charging time series depends on the underlying behavior scenario. Market prices and mobility demand are therefore used as scenario input parameters for a utility function based on the current state of charge to model individual behavior. The aggregated electricity demand is the starting point of the power flow calculation. The evaluation is carried out for an urban region with approximately 3100 residents. The analysis shows that increased penetration of photovoltaics combined with a flexible and adaptive charging strategy can maximize PV usage and reduce the need for congestion-related intervention by the grid operator by reducing the amount of kWh charged from the grid by 30% which reduces the average price of a charged kWh by 35% to 14 ct/kWh from 21.8 ct/kWh without PV optimization. The resulting grid congestions are managed by implementing an intelligent price or control signal. The analysis took place using data from a real German grid with 10 subgrids. The entire software can be adapted for the analysis of different distribution grids and is publicly available as an open-source software library on GitHub.
KW  - distribution grid simulation
KW  - smart-charging
KW  - e-mobility
Y1  - 2023
U6  - http://dx.doi.org/10.3390/en16083380
SN  - 1996-1073
N1  - This article belongs to the Special Issue "Advanced Solutions for the Efficient Integration of Electric Vehicles in Electricity Grids"
N1  - Corresponding author: Florian Maurer
VL  - 16
IS  - 8
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Butenweg, Christoph
A1  - Rosin, Julia
A1  - Holler, Stefan
T1  - Analysis of cylindrical granular material silos under seismic excitation
JF  - Buildings
N2  - Silos generally work as storage structures between supply and demand for various goods, and their structural safety has long been of interest to the civil engineering profession. This is especially true for dynamically loaded silos, e.g., in case of seismic excitation. Particularly thin-walled cylindrical silos are highly vulnerable to seismic induced pressures, which can cause critical buckling phenomena of the silo shell. The analysis of silos can be carried out in two different ways. In the first, the seismic loading is modeled through statically equivalent loads acting on the shell. Alternatively, a time history analysis might be carried out, in which nonlinear phenomena due to the filling as well as the interaction between the shell and the granular material are taken into account. The paper presents a comparison of these approaches. The model used for the nonlinear time history analysis considers the granular material by means of the intergranular strain approach for hypoplasticity theory. The interaction effects between the granular material and the shell is represented by contact elements. Additionally, soil–structure interaction effects are taken into account.
KW  - granular silo
KW  - earthquake engineering
KW  - hypoplasticity
KW  - nonlinear transient analyses
Y1  - 2017
U6  - http://dx.doi.org/10.3390/buildings7030061
SN  - 2075-5309
VL  - 7
IS  - 3
SP  - 1
EP  - 12
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Barsov, S.
A1  - Bechstedt, U.
A1  - Hardt, Arno
T1  - ANKE, a new facility for medium energy hadron physics at COSY-Jülich / S. Barsov [u.a.]
JF  - Nuclear instruments and methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Vol. 462, iss. 3
Y1  - 2001
SN  - 0167-5087 (Print) ; 0168-9002 (E-journal)
SP  - 364
EP  - 381
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Darmo, J.
A1  - Dubecký, F.
A1  - Kordos, P.
T1  - Annealing characteristics of native defects in low-temperature-grown MBE GaAs / J. Darmo ; F. Dubecky ; P. Kordos ; A. Förster
JF  - Semiconducting and insulating materials 1996 : proceedings of the 9th Conference on Semiconducting and Insulating Materials (SIMC '9), April 29 - May 3, 1996, Toulouse, France / [IEEE]
Y1  - 1996
SN  - 0-7803-3095-1
N1  - 2. ISBN: 0-7803-3179-6 ; Conference on Semiconducting and Insulating Materials <9, 1996, Toulouse> ; Institute of Electrical and Electronics Engineers ; IEEE Cat. No.96CH35881
SP  - 67
EP  - ff.
CY  - Piscataway, NJ [u.a.]
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Darmo, J.
A1  - Dubecky, F.
A1  - Kordos, P.
T1  - Annealing effect on concentration of EL6-like deep-level state in low-temperature-grown molecular beam epitaxial GaAs. Darmo, J.; Dubecky, F.; Kordos, P.; Förster, A.
JF  - Applied Physics Letters. 72 (1998), H. 5
Y1  - 1998
SN  - 1077-3118
SP  - 590
EP  - 592
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Nießner, R.
T1  - Application of a Multistep Condensation Nuclei Counter as a Detector for Particle Surface Composition / Nießner, R. ; Helsper, C.
JF  - Journal of Aerosol Science. 16 (1985), H. 3
Y1  - 1985
SN  - 0021-8502
SP  - 201
EP  - 209
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Nießner, R.
A1  - Rönicke, G.
T1  - Application of a Multistep Condensation Nuclei Counter as a Detector for Particle Surface Composition / Nießner, R.; Helsper, C.; Rönicke, G.
JF  - Aerosols : science, technology, and industr. applications of airborne particles ; proceedings of the 1. Internat. Aerosol Conference held Sept. 17-21, 1984, Minneapolis, Minn., U.S.A / ed.: Benjamin Y. H. Liu
Y1  - 1984
SN  - 0444009477
N1  - International Aerosol Conference ; (1, 1984, Minneapolis, Minn.)
SP  - 63
EP  - 66
PB  - Elsevier
CY  - New York [u.a.]
ER  - 
TY  - JOUR
A1  - Pieper, Martin
A1  - Klein, Peter
T1  - Application of simple, periodic homogenization techniques to non-linear heat conduction problems in non-periodic, porous media
JF  - Heat mass transfer
N2  - Often, detailed simulations of heat conduction in complicated, porous media have large runtimes. Then homogenization is a powerful tool to speed up the calculations by preserving accurate solutions at the same time. Unfortunately real structures are generally non-periodic, which requires unpractical, complicated homogenization techniques. We demonstrate in this paper, that the application of simple, periodic techniques to realistic media, that are just close to periodic, gives accurate, approximative solutions. In order to obtain effective parameters for the homogenized heat equation, we have to solve a so called “cell problem”. In contrast to periodic structures it is not trivial to determine a suitable unit cell, which represents a non-periodic media. To overcome this problem, we give a rule of thumb on how to choose a good cell. Finally we demonstrate the efficiency of our method for virtually generated foams as well as real foams and compare these results to periodic structures.
Y1  - 2012
U6  - http://dx.doi.org/10.1007/s00231-011-0879-4
SN  - 0947-7411
VL  - 48
IS  - 2
SP  - 291
EP  - 300
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Resch, U.
A1  - Essera, N.
A1  - Raptis, Y. S.
T1  - Arsenic passivation of MBE grown GaAs(100): structural and electronic properties of the decapped surfaces / U. Resch ;  N. Essera ; Y. S. Raptis ... A. Förster ...
JF  - Surface Science. 269-270 (1992)
Y1  - 1992
SN  - 0039-6028
N1  - ISSN der E-Ausg.: 0039-6028
SP  - 797
EP  - 803
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Schäfer, B.-J.
A1  - Londschien, M.
T1  - Arsenic passivation of MOMBE grown GaAs surfaces / B. -J. Schäfer ;  A. Förster ; M. Londschien ...
JF  - Surface Science. 204 (1988), H. 3
Y1  - 1988
SN  - 0039-6028
N1  - ISSN der E-Ausg.: 0039-6028
SP  - 485
EP  - 490
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Rosenauer, A.
A1  - Oberst, W.
A1  - Gerthsen, D.
T1  - Atomic scale analysis of the indium distribution in InGaAs/GaAs (001) heterostructures: segregation, lateral indium redistribution and the effect of growth interruptions. Rosenauer, A. ; Oberst, W. ; Gerthsen, D. ; Förster, A.
JF  - Thin Solid Films. 357 (1999)
Y1  - 1999
SN  - 0040-6090
SP  - 18
EP  - 21
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Rosenauer, A.
A1  - Remmele, T.
T1  - Atomic scale strain measurements by the digital analysis of transmission electron microscopic lattice images / A. Rosenauer ; T. Remmele ; D. Gerthsen ... A. Förster
JF  - Optik : international journal for light and electron optics. 105 (1997), H. 3
Y1  - 1997
SN  - 0030-4026
SP  - 99
EP  - 107
ER  - 
TY  - JOUR
A1  - Marx, Ulrich
A1  - Schenk, Friedrich
A1  - Behrens, Jan
A1  - Meyr, Ulrike
A1  - Wanek, Paul
A1  - Zang, Werner
A1  - Schmitt, Robert
A1  - Brüstle, Oliver
A1  - Zenke, Martin
A1  - Klocke, Fritz
T1  - Automatic production of induced pluripotent stem cells
JF  - Procedia CIRP : First CIRP Conference on BioManufacturing
Y1  - 2013
SN  - 2212-8271
VL  - Vol. 5
SP  - 2
EP  - 6
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Ohler, C.
A1  - Moers, J.
T1  - Band offsets at heavily strained III - V interfaces / C. Ohler ; A. Förster ; J. Moers...
JF  - Journal of Physics D: Applied Physics. 30 (1997), H. 10
Y1  - 1997
SN  - 0022-3727
N1  - ISSN der E-Ausg.: 1361-6463
SP  - 1436
EP  - 1441
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Ohler, C.
A1  - Daniels, C.
T1  - Barrier height at clean Au/InAs(100) interfaces / C. Ohler ; C. Daniels ; A. Förster ...
JF  - Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures. 15 (1997), H. 3
Y1  - 1997
SN  - 0169-4332
SP  - 702
EP  - 706
ER  - 
TY  - JOUR
A1  - Darmo, J.
A1  - Schäffer, F.
A1  - Förster, Arnold
A1  - Kordos, P.
T1  - Beryllium doped low-temperature-grown MBE GaAs: material for photomixing in the THz frequency range
JF  - ASDAM 2000 : conference proceedings / edited by Jozef Osvald ... [et al.]
Y1  - 2000
SN  - 0780359399
N1  - International Conference on Advanced Semiconductor Devices and Microsystems ; (3rd : ; 2000 : ; Smolenice, Slovakia)
SP  - 147
EP  - 150
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Rateike, Franz-Matthias
A1  - Siebourg, W.
A1  - Schmid, H.
A1  - Anders, S.
T1  - Birefringence - An important property of plastic substrates for magneto-optical storage disks / W. Siebourg ;  H. Schmid ;  F. M. Rateike ; S. Anders ; U. Grigo ; H. Löwer
JF  - Polymer engineering & science / Society of Plastics Engineers. 30 (1990), H. 18
Y1  - 1990
SN  - 0032-3888
SP  - 1133
EP  - 1139
ER  - 
TY  - JOUR
A1  - Heel, Mareike van
A1  - Dikta, Gerhard
A1  - Braekers, Roel
T1  - Bootstrap based goodness‑of‑fit tests for binary multivariate regression models
JF  - Journal of the Korean Statistical Society
N2  - We consider a binary multivariate regression model where the conditional expectation of a binary variable given a higher-dimensional input variable belongs to a parametric family. Based on this, we introduce a model-based bootstrap (MBB) for higher-dimensional input variables. This test can be used to check whether a sequence of independent and identically distributed observations belongs to such a parametric family. The approach is based on the empirical residual process introduced by Stute (Ann Statist 25:613–641, 1997). In contrast to Stute and Zhu’s approach (2002) Stute & Zhu (Scandinavian J Statist 29:535–545, 2002), a transformation is not required. Thus, any problems associated with non-parametric regression estimation are avoided. As a result, the MBB method is much easier for users to implement. To illustrate the power of the MBB based tests, a small simulation study is performed. Compared to the approach of Stute & Zhu (Scandinavian J Statist 29:535–545, 2002), the simulations indicate a slightly improved power of the MBB based method. Finally, both methods are applied to a real data set.
Y1  - 2021
U6  - http://dx.doi.org/10.1007/s42952-021-00142-4
SN  - 2005-2863 (Online)
SN  - 1226-3192 (Print)
N1  - Corresponding author: Mareike van Heel
VL  - 51
PB  - Springer Nature
CY  - Singapur
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Schelthoff, Christof
A1  - Mathieu, Moritz
T1  - Calculation of interception efficiencies for airterminations using a dynamic electro-geometrical  model
Y1  - 2011
N1  - XI International Symposium on Lightning Protection (SIPDA), Fortaleza (Brasilien), 2011.
SP  - 1
EP  - 6
PB  - IEEE
CY  - New York
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Wiesinger, J.
A1  - Zischank, Wolfgang J.
T1  - Calculation of the longitudinal voltage along metal tubes caused by lightning currents and protection measures
JF  - Seventh International Symposium on High Voltage Engineering : Dresden, August 26 - 30 1991
Y1  - 1991
N1  - International Symposium on High Voltage Engineering <7, 1991, Dresden>
PB  - Techn. Univ.
CY  - Dresden
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Kasper, W.
T1  - Calibration of Optical Particle Counters with Respect to Particle Size / Fißan, H. J. ; Helsper, C.; Kasper, W.
JF  - Particle and Particle Systems Characterization. 1 (1984), H. 1984
Y1  - 1984
SN  - 1521-4117
SP  - 108
EP  - 111
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Calibration of the Polytec HC-15 and HC-70 Optical Particle Counters / Fißan, H. J. ; Helsper, C.
JF  - Aerosols in the mining and industrial work environments, Vol. 3. Instrumentation, Marple, Virgil A. ; Liu, Benjamin Y.
Y1  - 1983
N1  - International Symposium on Aerosols in the Mining and Industrial Work Environment ; (1981.11.01-06 : ; Minneapolis/Minn.)
SP  - 825
EP  - 829
PB  - Ann Arbor Science
CY  - Ann Arbor, Mich.
ER  - 
TY  - JOUR
A1  - Hoffstadt, Kevin
A1  - Pohen, Gino D.
A1  - Dicke, Max D.
A1  - Paulsen, Svea
A1  - Krafft, Simone
A1  - Zang, Joachim W.
A1  - Fonseca-Zang, Warde A. da
A1  - Leite, Athaydes
A1  - Kuperjans, Isabel
T1  - Challenges and prospects of biogas from energy cane as supplement to bioethanol production
JF  - Agronomy
N2  - Innovative breeds of sugar cane yield up to 2.5 times as much organic matter as conventional breeds, resulting in a great potential for biogas production. The use of biogas production as a complementary solution to conventional and second-generation ethanol production in Brazil may increase the energy produced per hectare in the sugarcane sector. Herein, it was demonstrated that through ensiling, energy cane can be conserved for six months; the stored cane can then be fed into a continuous biogas process. This approach is necessary to achieve year-round biogas production at an industrial scale. Batch tests revealed specific biogas potentials between 400 and 600 LN/kgVS for both the ensiled and non-ensiled energy cane, and the specific biogas potential of a continuous biogas process fed with ensiled energy cane was in the same range. Peak biogas losses through ensiling of up to 27% after six months were observed. Finally, compared with second-generation ethanol production using energy cane, the results indicated that biogas production from energy cane may lead to higher energy yields per hectare, with an average energy yield of up to 162 MWh/ha. Finally, the Farm²CBG concept is introduced, showing an approach for decentralized biogas production.
Y1  - 2020
U6  - http://dx.doi.org/10.3390/agronomy10060821
SN  - 2073-4395
VL  - 10
IS  - 6
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Schwarzer, Klemens
A1  - Silva, Maria Eugenia Vieira da
T1  - Characterisation and design methods of solar cookers / Schwarzer, Klemens ; Silva, Maria Eugenia Vieira da
JF  - Solar energy. 82 (2008), H. 2
Y1  - 2008
SN  - 0038-092X
SP  - 157
EP  - 163
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Mölter, W.
T1  - Characteristics of a Nebulizer with Cyclone Preseparator / Mölter, W. ; Helsper, C.
JF  - Aerosols, their generation, behaviour and applications. Annual Conference of the Aerosol Society / Aerosol Society (UK) ; 5.
Y1  - 1991
SP  - 89
EP  - 94
CY  - Loughborough
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Morvic, M.
A1  - Betko, J.
A1  - Novak, J.
T1  - Characterization of low-temperature GaAs by conductivity, Hall effect and magnetoresistance measurements.  Morvic, M., Betko, J.; Novak, J.; Förster, A.; Kordos, P.
JF  - 2nd Symposium on Non-Stoichiometric III-V Compounds : [4th - 6th October 1999, Erlangen] / [ed. by T. Marek ...] Friedrich-Alexander-Universität Erlangen-Nürnberg
Y1  - 1999
SN  - 3-932392-19-1
N1  - Symposium on Non-Stoichiometric III-V Compounds <2, 1999, Erlangen>
SP  - 79
EP  - 85
PB  - Lehrstuhl für Mikrocharakterisierung
CY  - Erlangen
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Novak, J.
A1  - Kucera, M.
A1  - Morvic, M.
T1  - Characterization of low-temperature GaAs by galvanomagnetic an photoluminescence measurements / J. Novák ; M. Kucera ; M. Morvic ... A. Förster ...
JF  - Materials science and engineering B: Solid&#150; state materials for advanced technology. 44 (1997), H. 1-3
Y1  - 1997
SN  - 0921-5107
SP  - 341
EP  - 344
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Lütkemeier, E.
A1  - Wiedensohler, A.
T1  - Charge Distribution by Unipolar Charging of Small Aerosol Particles / Lütkemeier, E. ; Helsper, C. ; Wiedensohler, A.
JF  - Aerosols : formation and reactivity ; proceedings of the second International Aerosol Conference, 22-26 Sept. 1986, Berlin (West) / Gesellschaft für Aerosolforschung (GAeF) ; American Association for Aerosol Research (AAAR)
Y1  - 1986
N1  - International Aerosol Conference ; (2, 1986, Berlin (West))
SP  - 474
EP  - 478
PB  - Pergamon Press
CY  - Oxford [u.a.]
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Lachenmann, S. G.
A1  - Friedrich, I.
T1  - Charge transport in superconductor/semiconductor/normal-conductor step junctions / S. G. Lachenmann ; I. Friedrich ; A. Förster ...
JF  - Physical review / B, Condensed matter and materials physics. 56 (1997), H. 21
Y1  - 1997
SN  - 1095-3795
SP  - 14108
EP  - 14115
ER  - 
TY  - JOUR
A1  - Sommer, F.
A1  - Gerling, Ulrich
A1  - Predel, Bruno
T1  - Comments on 'On the evaluation of interchange energies and the equilibrium constant from mixing enthalpies of a regular associated solution' by S. Lele, G.V.S. Sastry, and P. Ramachandrarao = Kommentar zu 'Zur Berechnung der Wechselwirkungsenergien und der Gleichgewichtskonstanten aus Mischungsenthalpien in regulären assoziierten Lösungen' von S. Lele, G.V.S. Sastry und P. Ramachandrarao
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 75, H. 6
Y1  - 1984
SN  - 0044-3093 ; 0179-4841
SP  - 449
EP  - 454
ER  - 
TY  - JOUR
A1  - Hoffschmidt, Bernhard
A1  - Fend, Thomas
A1  - Jorgensen, Gary
A1  - Küster, Harald
T1  - Comparative assessment of solar concentrator materials / Fend, Thomas ; Hoffschmidt, Bernhard ; Jorgensen, Gary ; Küster, Harald ; Krüger, Dirk ; Pitz-Paal, Robert ; Riebrock, Peter ; Riffelmann, Klaus-Jürgen
JF  - Solar energy. 74 (2003), H. 2
Y1  - 2003
SN  - 0038-092X
SP  - 149
EP  - 155
ER  - 
TY  - JOUR
A1  - Hoffschmidt, Bernhard
A1  - Fend, Thomas
A1  - Jorgensen, Gary
T1  - Comparative assessment of solar concentrator materials / Thomas Fend ; Bernhard Hoffschmidt ; Gary Jorgensen ...
JF  - Renewable energy for local communities of Europe : (toward Rio+10) ; proceedings / EuroSun 2002, the 4th ISES Europe Solar Congress ; Bologna (Italy), 23 - 26 June 2002 / ISES Italia
Y1  - 2002
SN  - 88-900893-0-X
N1  - Eurosun <4, 2002, Bologna> ; International Solar Energy Society
SP  - paper_125.pdf
CY  - Bologna
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Hardtdegen, Hilde
A1  - Ungermanns, C.
T1  - Comparative investigation of electrical and optical characteristics of AlxGa1-xAs/GaAs structures deposited by LP-MOVPE and MBE / H. Hardtdegen ; M. Hollfelder ; C. Ungermanns ... A. Förster ...
JF  - Compound semiconductors, 1994 : proceedings of the twenty-first International Symposium on Compound Semiconductors held in San Diego, California, 18 - 22 September, 1994 / ed. by Herb Goronkin ... - (Conference series / Institute of Physics ; 141)
Y1  - 1995
SN  - 0-7503-0226-7
N1  - International Symposium on Compound Semiconductors <21, 1994, San Diego, Calif.> ;  Institute of Physics <London>
SP  - 81
EP  - ff.
PB  - Institute of Physics
CY  - Bristol [u.a.]
ER  - 
TY  - JOUR
A1  - Becker, Meike
A1  - Frauenrath, Tobias
A1  - Hezel, Fabian
A1  - Krombach, Gabriele A.
A1  - Kremer, Ute
A1  - Koppers, Benedikt
A1  - Butenweg, Christoph
A1  - Goemmel, Andreas
A1  - Utting, Jane F.
A1  - Schulz-Menger, Jeanette
A1  - Niendorf, Thoralf
T1  - Comparison of left ventricular function assessment using phonocardiogram- and electrocardiogram-triggered 2D SSFP CINE MR imaging at 1.5 T and 3.0 T
JF  - European Radiology
N2  - Objective: As high-field cardiac MRI (CMR) becomes more widespread the propensity of ECG to interference from electromagnetic fields (EMF) and to magneto-hydrodynamic (MHD) effects increases and with it the motivation for a CMR triggering alternative. This study explores the suitability of acoustic cardiac triggering (ACT) for left ventricular (LV) function assessment in healthy subjects (n=14). Methods: Quantitative analysis of 2D CINE steady-state free precession (SSFP) images was conducted to compare ACT’s performance with vector ECG (VCG). Endocardial border sharpness (EBS) was examined paralleled by quantitative LV function assessment. Results: Unlike VCG, ACT provided signal traces free of interference from EMF or MHD effects. In the case of correct Rwave recognition, VCG-triggered 2D CINE SSFP was immune to cardiac motion effects—even at 3.0 T. However, VCG-triggered 2D SSFP CINE imaging was prone to cardiac motion and EBS degradation if R-wave misregistration occurred. ACT-triggered acquisitions yielded LV parameters (end-diastolic volume (EDV), endsystolic volume (ESV), stroke volume (SV), ejection fraction (EF) and left ventricular mass (LVM)) comparable with those derived fromVCG-triggered acquisitions (1.5 T: ESVVCG=(56± 17) ml, EDVVCG=(151±32)ml, LVMVCG=(97±27) g, SVVCG=(94± 19)ml, EFVCG=(63±5)% cf. ESVACT= (56±18) ml, EDVACT=(147±36) ml, LVMACT=(102±29) g, SVACT=(91± 22) ml, EFACT=(62±6)%; 3.0 T: ESVVCG=(55±21) ml, EDVVCG=(151±32) ml, LVMVCG=(101±27) g, SVVCG=(96±15) ml, EFVCG=(65±7)% cf. ESVACT=(54±20) ml, EDVACT=(146±35) ml, LVMACT= (101±30) g, SVACT=(92±17) ml, EFACT=(64±6)%). Conclusions: ACT’s intrinsic insensitivity to interference from electromagnetic fields renders
KW  - Magnetic resonance imaging (MRI)
KW  - MR-stethoscope
KW  - Magnetic field strength
KW  - Left ventriular function
KW  - Cardiovascular MRI
Y1  - 2010
U6  - http://dx.doi.org/10.1007/s00330-009-1676-z
SN  - 1432-1084 (Onlineausgabe)
SN  - 0938-7994 (Druckausgabe)
VL  - 20
SP  - 1344
EP  - 1355
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Thomsen, M.
T1  - Comparison of single point and equipotential bonding for I&C systems of large-area industrial sites
JF  - Volume of proceedings : Budapest, Hungary, September 19-23, 1994 / organized by: Technical University of Budapest
Y1  - 1994
N1  - International Conference on Lightning Protection <22, 1994, Budapest> ; ICLP <22, 1994, Budapest> ; Budapesti M&#369;szaki Egyetem
PB  - Techn. Univ.
CY  - Budapest
ER  - 
TY  - JOUR
A1  - Späte, Frank
A1  - Faber, Christian
A1  - Schwarzer, Klemens
A1  - Hartz, Thomas
T1  - Comparison of solar hot water systems in solar settlements - decentralized or centralized systems?
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
SP  - 1-666-1-671
PB  - PSE
CY  - Freiburg [Breisgau]
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Roth, J.
A1  - Wiedmann, J.
T1  - Comparison of the damage for various types of fibre reinforced composites due to different lightning test standards (MIL-STD 1757 A, German military VG-standard 96903)
JF  - Proceedings of the 1992 International Aerospace and Ground Conference on Lightning and Static Electricity : October 6-8, 1992, Trump Taj Mahal, Atlantic City, NJ.
Y1  - 1992
N1  - International Conference on Lightning and Static Electricity <1992, Atlantic City, NJ>
PB  - U.S. Dept. of Transportation, Federal Aviation Administration
CY  - [Atlantic City, N.J.]
ER  - 
TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Shi, Z. R.
A1  - Schreckenback, K.
A1  - Aprahamian, A.
T1  - Complete spectroscopy and the 162Dy nucleus / Z. R. Shi ; K. Schreckenbach ; A. Aprahamian ... F. Hoyler ...
JF  - AIP conference proceedings (1999)
Y1  - 1999
SN  - 0094-243X
N1  - American Institute of Physics conference proceedings
SP  - 237
EP  - 238
ER  - 
TY  - JOUR
A1  - Hoyler, Friedrich
A1  - Aprahamian, A.
A1  - Wu, X.
A1  - Lesher, S. R.
T1  - Complete spectroscopy of the 162Dy nucleus / Aprahamian, A. ; Wu, X. ; Lesher, S. R. ; Warner, D. D. ; Gelletly, W. ; Börner, H. G. ; Hoyler, F. ; Schreckenbach, K. ; Carsten R. F. ; Shi, Z. R. ; Kusnezov, D. ; Ibrahim, M. ; Macchiavelli, A. O. ; Brinkman
JF  - Nuclear physics <Amsterdam> / A. 764 (2006)
Y1  - 2006
SN  - 0375-9474
SP  - 42
EP  - 78
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Rosenauer, A.
A1  - Fischer, U.
A1  - Gerthsen, D.
T1  - Composition evaluation by lattice fringe analysis. Rosenauer, A.; Fischer U.;  Gerthsen D.;  Förster A.
JF  - Ultramicroscopy. 72 (1998), H. 3-4
Y1  - 1998
SN  - 0304-3991
SP  - 121
EP  - 133
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Rosenauer, A.
A1  - Fischer, U.
A1  - Gerthsen, D.
T1  - Composition evaluation of InxGa1 – xAs Stranski-Krastanow-island structures by strain state analysis / A. Rosenauer ; U. Fischer ; D. Gerthsen ; A. Förster
JF  - Applied physics letters. 71 (1997), H. 26
Y1  - 1997
SN  - 0003-6951
N1  - ISSN der E-Ausg.: 1077-3118
SP  - 3868
EP  - 3870
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
A1  - Breitbach, Gerd
A1  - Hoffschmidt, Bernhard
A1  - Stobbe, P.
T1  - Computational fluid flow of porous resic ceramic filtering modules and optimization of the channel edge form geometry
JF  - Proceedings : April 14 - 18, 2008, Leipzig, Germany / hosted by VDI, Society for Chemical and Process Engineering . Vol 2
Y1  - 2008
N1  - Verein Deutscher Ingenieure ; World Filtration Congress ; (10 : ; 2008.04.14-18 : ; Leipzig) ; WFC ; (10 : ; 2008.04.14-18 : ; Leipzig)
SP  - 300
EP  - 304
PB  - Filtech Exhibitions
CY  - Meerbusch
ER  - 
TY  - JOUR
A1  - Holler, S.
A1  - Butenweg, Christoph
A1  - Noh, S.-Y.
A1  - Meskouris, Konstantin
T1  - Computational model of textile-reinforced concrete structures
JF  - Computers & structures : an international journal
Y1  - 2004
U6  - http://dx.doi.org/10.1016/j.compstruc.2004.03.076
SN  - 1879-2243 (E-Journal); 0045-7949 (Print)
VL  - Volume 82
IS  - Issues 23-26
SP  - 1971
EP  - 1979
ER  - 
TY  - JOUR
A1  - Brüssermann, Klaus
A1  - Ashton, P.
A1  - Leicht, R.
A1  - Martens, B.-R.
T1  - Concept of the Konrad repository documentation system for radioactive wastes (DORA) / Ashton, P.; Leicht, R.; Martens, B.-R.; Giller, H. Brüssermann, K.
JF  - Kerntechnik 94 : Jahrestagung, 17.-19. Mai 1994, Stuttgart: Tagungsbericht = Nuclear technology, annual meeting 94 / Veranst.: Kerntechnische Gesellschaft; Deutsches Atomforum
Y1  - 1994
SP  - 294
EP  - 297
PB  - INFORUM Verl.- u. Verwaltungs-Ges.
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Krichel, Frank
T1  - Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences
JF  - Journal of electrostatics. 60 (2004), H. 2-4
Y1  - 2004
SN  - 0304-3886
N1  - ISSN der E-Ausg.: 0304-3886
SP  - 257
EP  - 263
ER  - 
TY  - JOUR
A1  - Fleischhaker, Robert
A1  - Krauß, Nico
A1  - Schättiger, Farina
A1  - Dekorsy, Thomas
T1  - Consistent characterization of semiconductor saturable absorber mirrors with singe-pulse and pump-probe spectroscopy
JF  - Optics Express
Y1  - 2013
U6  - http://dx.doi.org/10.1364/OE.21.006764
SN  - 1094-4087
VL  - 21
IS  - 6
SP  - 6764
EP  - 6776
PB  - Optica
CY  - Washington, DC
ER  - 
TY  - JOUR
A1  - Rupp, Matthias
A1  - Handschuh, Nils
A1  - Rieke, Christian
A1  - Kuperjans, Isabel
T1  - Contribution of country-specific electricity mix and charging time to environmental impact of battery electric vehicles: A case study of electric buses in Germany
JF  - Applied Energy
Y1  - 2019
U6  - http://dx.doi.org/10.1016/j.apenergy.2019.01.059
SN  - 0306-2619
VL  - 237
SP  - 618
EP  - 634
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Krafft, B.
A1  - Förster, Arnold
A1  - Hart, A. van der
A1  - Schäpers, T.
T1  - Control of Aharonov-Bohm oscillations in a AlGaAs/GaAs ring by asymmetric and symmetric gate biasing
JF  - Physica E: Low-dimensional Systems and Nanostructures. 9 (2001), H. 4
Y1  - 2001
SN  - 1386-9477
SP  - 635
EP  - 641
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Schäpers, T.
A1  - Müller, F.
T1  - Control of ballistic electrons in (AlGa)As/GaAs heterostructures by means of superconducting niobium gate structures / T. Schäpers ; F. Müller ; A. Förster ...
JF  - Surface Science. 305 (1994), H. 1-3
Y1  - 1994
SN  - 0039-6028
N1  - ISSN der E-Ausg.: 0039-6028
SP  - 460
EP  - 464
ER  - 
TY  - JOUR
A1  - Martin, S. A.
A1  - Berg, G. P. A.
A1  - Hacker, U.
A1  - Hardt, Arno
A1  - Köhler, M.
A1  - Meißburger, J.
A1  - Osterfeld, F.
A1  - Prasuhn, D.
A1  - Riepe, G.
A1  - Rogge, M.
A1  - Schult, O. W. B.
A1  - Speth, J.
A1  - Turek, P.
A1  - Gaul, G.
A1  - Hagedoorn, H.
A1  - Heide, J. A. van der
A1  - Hinterberger, F.
A1  - Huber, M.
A1  - Jahn, R.
A1  - Mayer-Kuckuk, T.
A1  - Poth, H.
A1  - Paetz gen. Schieck, H.
T1  - COSY - a cooler synchrotron and storage ring
JF  - IEEE transactions on nuclear science. Vol. 32, iss. 5
Y1  - 1985
SN  - 1558-1578 (E-Journal); 0018-9499 (Print)
SP  - 2694
EP  - 2696
ER  - 
TY  - JOUR
A1  - Tillmann, K.
A1  - Förster, Arnold
T1  - Critical dimensions for the formation of interfacial misfit dislocations of In0.6Ga0.4As islands on GaAs(001)
JF  - Thin Solid Films. 368 (2000), H. 1
Y1  - 2000
SN  - 0040-6090
SP  - 93
EP  - 104
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Verghese, S.
A1  - Zamdmer, N.
A1  - Hu, Qing
T1  - Cryogenic picosecond sampling using fiber-coupled photoconductive switch / S. Verghese ; N. Zamdmer ; Qing Hu ; A. Förster
JF  - Applied physics letters. 70 (1997), H. 20
Y1  - 1997
SN  - 0003-6951
N1  - ISSN der E-Ausg.: 1077-3118
SP  - 2644
EP  - 2646
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Kapadi, A.
A1  - Liu, B. Y. H.
T1  - Data Inversion by Simplex Minimization for the Electrical Aerosol Analyzer
JF  - Aerosol Science and Technology. 1 (1982), H. 1982
Y1  - 1982
SN  - 0278-6826
SP  - 136
EP  - 146
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Darmo, J.
A1  - Dubecký, F.
A1  - Kordos, P.
T1  - Deep-level states and electrical properties of GaAs grown at 250 °C / J. Darmo ; F. Dubecký ; P. Kordos ; A. Förster ...
JF  - Materials science and engineering B: Solid&#150; state materials for advanced technology. 28 (1994), H. 1-3
Y1  - 1994
SN  - 0921-5107
SP  - 393
EP  - 396
ER  - 
TY  - JOUR
A1  - Breitbach, Gerd
A1  - Schmidt-Plutka, A.
A1  - Schubert, F.
A1  - Nickel, H.
T1  - Deformation behaviour of structures exposed at very high temperatures to cyclic thermal and mechanical loadings
JF  - Structural mechanics in reactor technology : transactions of the 12th International Conference on Structural Mechanics in Reactor Technology, Stuttgart, Germany, 15-20 August 1993 / ed. Karl F. Kussmaul. - Bd. L : Inelastic behaviour of solids and structures
Y1  - 1993
SN  - 0-444-81515-5
N1  - SMiRT <12, 1993, Stuttgart>  ; L08/3
SP  - 203
EP  - 208
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Indlekofer, K.M.
A1  - Lüth, H.
T1  - Density-matrix description of a quantum dot system with variable lateral confinement in the single-electron tunneling regime. Indlekofer, K.M.; Förster, A.; Lüth, H.
JF  - Physica B: Condensed Matter. 314 (2002), H. 1-4
Y1  - 2002
SN  - 0921-4526
SP  - 499
EP  - 502
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Rose, D.
A1  - Pietsch, U.
A1  - Metzger, H.
T1  - Depth resolved investigation of the relaxation behaviour in strained GaInAs/GaAs superlattices / Rose, D. ; Pietsch, U. ; Förster, A. ; Metzger, H....
JF  - Physica B: condensed matter. 198 (1994), H. 1-3
Y1  - 1994
SN  - 0921-4526
SP  - 256
EP  - 258
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Rose, D.
A1  - Pietsch, U.
A1  - Metzger, T. H.
T1  - Depth resolved investigations of the relaxation behaviour in strained GaInAs/GaAs superlattices using grazing incidence X-ray diffraction / Rose, D. ; Pietsch, U. ; Förster, A. ; Metzger, T. H.
JF  - Nuclear instruments and methods in physics research / Section B, Beam interactions with materials and atoms. 97 (1995), H. 1-4
Y1  - 1995
SN  - 0168-583X
SP  - 333
EP  - 336
ER  - 
TY  - JOUR
A1  - Hoffstadt, Kevin
A1  - Cheenakula, Dheeraja
A1  - Nikolausz, Marcell
A1  - Krafft, Simone
A1  - Harms, Hauke
A1  - Kuperjans, Isabel
T1  - Design and construction of a new reactor for flexible biomethanation of hydrogen
JF  - Fermentation
N2  - The increasing share of renewable electricity in the grid drives the need for sufficient storage capacity. Especially for seasonal storage, power-to-gas can be a promising approach. Biologically produced methane from hydrogen produced from surplus electricity can be used to substitute natural gas in the existing infrastructure. Current reactor types are not or are poorly optimized for flexible methanation. Therefore, this work proposes a new reactor type with a plug flow reactor (PFR) design. Simulations in COMSOL Multiphysics ® showed promising properties for operation in laminar flow. An experiment was conducted to support the simulation results and to determine the gas fraction of the novel reactor, which was measured to be 29%. Based on these simulations and experimental results, the reactor was constructed as a 14 m long, 50 mm diameter tube with a meandering orientation. Data processing was established, and a step experiment was performed. In addition, a kLa of 1 h−1 was determined. The results revealed that the experimental outcomes of the type of flow and gas fractions are in line with the theoretical simulation. The new design shows promising properties for flexible methanation and will be tested.
KW  - methanation
KW  - plug flow reactor
KW  - bubble column
KW  - bio-methane
KW  - power-to-gas
Y1  - 2023
U6  - http://dx.doi.org/10.3390/fermentation9080774
SN  - 2311-5637
N1  - The article belongs to the Special Issue Fermentation Processes: Modeling, Optimization and Control
VL  - 9
IS  - 8
SP  - 1
EP  - 16
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Kürten, Sylvia
A1  - Mottaghy, Darius
A1  - Ziegler, Martin
T1  - Design of plane energy geostructures based on laboratory tests and numerical modelling
JF  - Energy and Buildings
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.enbuild.2015.08.039
SN  - 0378-7788
VL  - 107
SP  - 434
EP  - 444
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Rochefort, E. de
A1  - Verver, M.
A1  - Grunendahl, A.
A1  - Mooi, H.
A1  - Butenweg, Christoph
T1  - Detailed modelling of the lumbar spine for investigations of low back pain
JF  - SAE transactions : papers presented at Society and Section meetings / Society of Automotive Engineers
Y1  - 2005
SN  - 0096-736X
VL  - Volume 114
IS  - Part 7
SP  - 788
EP  - 796
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Thielen, H. J.
T1  - Determination of Particle Size Distributions by Means of an Electrostatic Classifier / Fißan, H. J.; Helsper, C. ; Thielen, H. J.
JF  - Journal of Aerosol Science. 14 (1983), H. 3
Y1  - 1983
SN  - 0021-8502
SP  - 354
EP  - 357
ER  - 
TY  - JOUR
A1  - Förster, Arnold
A1  - Tillmann, K.
A1  - Thust, M.
T1  - Determination of segregation, elastic strain and thin-foil relaxation in InxGa-1-x As islands on GaAs(001) by high resolution transmission electron microscopy / K. Tillmann ; A. Thust ; M. Lentzen ... A. Förster ...
JF  - Philosophical magazine / Letters. 74 (1996), H. 5
Y1  - 1996
SN  - 1362-3036
SP  - 309
EP  - 315
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Wiedensohler, A.
A1  - Weise, W.
A1  - Lütkemeier, E.
T1  - Determination of the Bipolar Charge Equilibrium in Pure Gases / Wiedensohler, A. ; Weise, W. ; Helsper, C. ; Lütkemeier, E.
JF  - Aerosols : formation and reactivity ; proceedings of the second International Aerosol Conference, 22-26 Sept. 1986, Berlin (West) / Gesellschaft für Aerosolforschung (GAeF) ; American Association for Aerosol Research (AAAR)
Y1  - 1986
N1  - International Aerosol Conference ; (2, 1986, Berlin (West))
SP  - 383
EP  - 386
PB  - Pergamon Press
CY  - Oxford [u.a.]
ER  - 
TY  - JOUR
A1  - Werner, Frederik
A1  - Krumbe, Christoph
A1  - Schumacher, Katharina
A1  - Groebel, Simone
A1  - Spelthahn, Heiko
A1  - Stellberg, Michael
A1  - Wagner, Torsten
A1  - Yoshinobu, Tatsuo
A1  - Selmer, Thorsten
A1  - Keusgen, Michael
A1  - Baumann, Marcus
A1  - Schöning, Michael Josef
T1  - Determination of the extracellular acidification of Escherichia coli by a light-addressable potentiometric sensor
JF  - Physica status solidi (a) : applications and material science. 208 (2011), H. 6
Y1  - 2011
SN  - 1862-6319
SP  - 1340
EP  - 1344
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Arpshofen, Ingo
A1  - Pool, M. J.
A1  - Sommer, Ferdinand
A1  - Gerling, Ulrich
A1  - Predel, Bruno
A1  - Schultheiss, Emil
T1  - Determination of the integral mixing enthalpies in the Cu-Pd-Si liquid ternary alloy system at 1600 K
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 74, H. 1
Y1  - 1983
SN  - 0044-3093 ; 0179-4841
SP  - 25
EP  - 32
ER  - 
TY  - JOUR
A1  - Hoffschmidt, Bernhard
A1  - Fernandez, V.
A1  - Konstandopoulus, A. G.
T1  - Development of ceramic volumetric receiver technology
JF  - Forschungsbericht : DLR FB. 10 (2001)
Y1  - 2001
SN  - 0939-2963
N1  - 2. ISSN: 1434-8454 ; Kölner Sonnenkolloquium <5, 2001, Köln> ; Solar thermal power plants and solar chemical processes : advances and perspectives for international cooperation
SP  - 51
EP  - 61
ER  - 
TY  - JOUR
A1  - Edip, K.
A1  - Sesov, V.
A1  - Butenweg, Christoph
A1  - Bojadjieva, J.
T1  - Development of coupled numerical model for simulation of multiphase soil
JF  - Computers and Geotechnics
N2  - In this paper, a coupled multiphase model considering both non-linearities of water retention curves and solid state modeling is proposed. The solid displacements and the pressures of both water and air phases are unknowns of the proposed model. The finite element method is used to solve the governing differential equations. The proposed method is demonstrated through simulation of seepage test and partially consolidation problem. Then, implementation of the model is done by using hypoplasticity for the solid phase and analyzing the fully saturated triaxial experiments. In integration of the constitutive law error controlling is improved and comparisons done accordingly. In this work, the advantages and limitations of the numerical model are discussed.
Y1  - 2018
U6  - http://dx.doi.org/10.1016/j.compgeo.2017.08.016
SN  - 0266-352X
VL  - 96
SP  - 118
EP  - 131
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Schüller-Ruhl, Aaron
A1  - Dinstühler, Leonard
A1  - Senger, Thorsten
A1  - Bergfeld, Stefan
A1  - Ingenhag, Christian
A1  - Fleischhaker, Robert
ED  - Mackenzie, Jacob
T1  - Direct fabrication of arbitrary phase masks in optical glass via ultra-short pulsed laser writing of refractive index modifications
JF  - Applied Physics B
N2  - We study the possibility to fabricate an arbitrary phase mask in a one-step laser-writing process inside the volume of an optical glass substrate. We derive the phase mask from a Gerchberg–Saxton-type algorithm as an array and create each individual phase shift using a refractive index modification of variable axial length. We realize the variable axial length by superimposing refractive index modifications induced by an ultra-short pulsed laser at different focusing depth. Each single modification is created by applying 1000 pulses with 15 μJ pulse energy at 100 kHz to a fixed spot of 25 μm diameter and the focus is then shifted axially in steps of 10 μm. With several proof-of-principle examples, we show the feasibility of our method. In particular, we identify the induced refractive index change to about a value of Δn=1.5⋅10−3. We also determine our current limitations by calculating the overlap in the form of a scalar product and we discuss possible future improvements.
Y1  - 2022
U6  - http://dx.doi.org/10.1007/s00340-022-07928-2
SN  - 1432-0649 (Online)
SN  - 0946-2171 (Print)
N1  - Corresponding author: Robert Fleischhaker
VL  - 128
IS  - Article number: 208
SP  - 1
EP  - 11
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Schwarzer, Klemens
A1  - Krings, T.
T1  - Dissemination of solar cookers with and without temporary storage : a report of concrete examples ; experiences from Chile, India and Mali
JF  - Proceedings / EuroSun '96 : 10. Internationales Sonnenforum. Ed. by A. Goetzberger ... - Bd. 4
Y1  - 1996
N1  - EuroSun <1, 1996, Freiburg, Breisgau>
SP  - 1479
EP  - 1482
PB  - DGS-Sonnenenergie-Verl.
CY  - München
ER  -