TY - JOUR
A1 - Vogt, Christian
A1 - Iwanowski-Strahser, Katha
A1 - Marquart, Gabriele
A1 - Arnold, Juliane
A1 - Mottaghy, Darius
A1 - Pechnig, Renate
A1 - Gnjezda, Daniel
A1 - Clauser, Christoph
T1 - Modeling contribution to risk assessment of thermal production power for geothermal reservoirs
JF - Renewable Energy
Y1 - 2013
U6 - https://doi.org/10.1016/j.renene.2012.11.026
SN - 0960-1481
VL - 53
SP - 230
EP - 241
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Vogt, C.
A1 - Mottaghy, Darius
A1 - Wolf, A.
A1 - Rath, V.
A1 - Pechnig, R.
A1 - Clauser, C.
T1 - Reducing temperature uncertainties by stochastic geothermal reservoir modelling
JF - Geophysical Journal International
N2 - Quantifying and minimizing uncertainty is vital for simulating technically and economically successful geothermal reservoirs. To this end, we apply a stochastic modelling sequence, a Monte Carlo study, based on (i) creating an ensemble of possible realizations of a reservoir model, (ii) forward simulation of fluid flow and heat transport, and (iii) constraining post-processing using observed state variables. To generate the ensemble, we use the stochastic algorithm of Sequential Gaussian Simulation and test its potential fitting rock properties, such as thermal conductivity and permeability, of a synthetic reference model and—performing a corresponding forward simulation—state variables such as temperature. The ensemble yields probability distributions of rock properties and state variables at any location inside the reservoir. In addition, we perform a constraining post-processing in order to minimize the uncertainty of the obtained distributions by conditioning the ensemble to observed state variables, in this case temperature. This constraining post-processing works particularly well on systems dominated by fluid flow. The stochastic modelling sequence is applied to a large, steady-state 3-D heat flow model of a reservoir in The Hague, Netherlands. The spatial thermal conductivity distribution is simulated stochastically based on available logging data. Errors of bottom-hole temperatures provide thresholds for the constraining technique performed afterwards. This reduce the temperature uncertainty for the proposed target location significantly from 25 to 12 K (full distribution width) in a depth of 2300 m. Assuming a Gaussian shape of the temperature distribution, the standard deviation is 1.8 K. To allow a more comprehensive approach to quantify uncertainty, we also implement the stochastic simulation of boundary conditions and demonstrate this for the basal specific heat flow in the reservoir of The Hague. As expected, this results in a larger distribution width and hence, a larger, but more realistic uncertainty estimate. However, applying the constraining post-processing the uncertainty is again reduced to the level of the post-processing without stochastic boundary simulation. Thus, constraining post-processing is a suitable tool for reducing uncertainty estimates by observed state variables.
Y1 - 2010
U6 - https://doi.org/10.1111/j.1365-246X.2009.04498.x
SN - 1365-246X
VL - 181
IS - 1
SP - 321
EP - 333
PB - Oxford University Press
CY - Oxford
ER -
TY - JOUR
A1 - Vogt, C.
A1 - Mottaghy, Darius
A1 - Rath, V.
A1 - Marquart, G.
A1 - Dijkshoorn, L.
A1 - Wolf, A.
A1 - Clauser, C.
T1 - Vertical variation in heat flow on the Kola Peninsula: palaeoclimate or fluid flow?
JF - Geophysical Journal International
N2 - Following earlier studies, we present forward and inverse simulations of heat and fluid transport of the upper crust using a local 3-D model of the Kola area. We provide best estimates for palaeotemperatures and permeabilities, their errors and their dependencies. Our results allow discriminating between the two mentioned processes to a certain extent, partly resolving the non-uniqueness of the problem. We find clear indications for a significant contribution of advective heat transport, which, in turn, imply only slightly lower ground surface temperatures during the last glacial maximum relative to the present value. These findings are consistent with the general background knowledge of (i) the fracture zones and the corresponding fluid movements in the bedrock and (ii) the glacial history of the Kola area.
Y1 - 2014
U6 - https://doi.org/10.1093/gji/ggu282
SN - 1365-246X
VL - 199
IS - 2
SP - 829
EP - 843
PB - Oxford University Press
CY - Oxford
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 - Vitusevich, S. A.
A1 - Förster, Arnold
A1 - Reetz, W.
A1 - Lüth, H.
A1 - Belyaev, A. E.
A1 - Danylyuk, S. V.
T1 - Fine structure of photoresponse spectra in a double-barrier resonant tunnelling diode
JF - Nanotechnology. 11 (2000), H. 4
Y1 - 2000
SN - 1361-6528
SP - 305
EP - 308
ER -
TY - JOUR
A1 - Vitusevich, S. A.
A1 - Förster, Arnold
A1 - Lüth, H.
A1 - Belyaev, A. E.
A1 - Danylyuk, S. V.
A1 - Konakova, R. V.
A1 - Sheka, D. I.
T1 - Resonant spectroscopy of electric-field-induced superlattices
JF - Journal of Applied Physics. 90 (2001), H. 6
Y1 - 2001
SN - 1089-7550
U6 - https://doi.org/10.1063/1.1392956
SP - 2857
EP - 2861
ER -
TY - JOUR
A1 - Vitusevich, S. A.
A1 - Förster, Arnold
A1 - Indlekofer, K.-M.
A1 - Lüth, H.
A1 - Belyaev, A. E.
A1 - Glavin, B. A.
A1 - Konakova, R. V.
T1 - Tunneling Through X-Valley-Related Impurity States in GaAs/AlAs Resonant-Tunneling Diodes
JF - Physical Review . B. 61 (2000), H. 16
Y1 - 2000
SN - 1550-235X
SP - 10898
EP - 10904
ER -
TY - JOUR
A1 - Verschitz, Daniel
A1 - Butenweg, Christoph
T1 - Standsicherheitsnachweis von Behältern für Kleinkläranlagen
JF - ACWA aktuell
N2 - Die PIA GmbH prüft seit fast 8 Jahren die Standsicherheit von Behältern für Kleinkläranlagen. Diese bestehen in der Regel aus Kunststoff oder Beton und müssen über ihre gesamte Lebensdauer den Beanspruchungen aus Handhabung, Einbau und Betrieb standhalten. Die Standsicherheit kann nach EN 12566 wahlweise durch einen rechnerischen Nachweis oder durch einen praktischen Nachweis wie die Bruchlastprüfung oder die Prüfung in der Grube erfolgen.
Y1 - 2014
IS - 12 - 9/2014
SP - 10
PB - RWTH Aachen
CY - Aachen
ER -
TY - JOUR
A1 - Velraj, R.
A1 - Seeniraj, R. V.
A1 - Hafner, B.
A1 - Faber, Christian
A1 - Schwarzer, Klemens
T1 - Experimental analysis and numerical modelling of inward solidification on a finned vertical tube for a latent heat storage unit
JF - Solar energy. 60 (1997), H. 5
Y1 - 1997
SN - 0038-092X
SP - 281
EP - 290
ER -
TY - JOUR
A1 - Varga, Laszlo
A1 - Davinson, Thomas
A1 - Glorius, Jan
A1 - Jurado, Beatrix
A1 - Langer, Christoph
A1 - Lederer-Woods, Claudia
A1 - Litvinov, Yuri A.
A1 - Reifarth, Rene
A1 - Slavkovska, Zuzana
A1 - Stöhlker, Thomas
A1 - Woods, Phil J.
A1 - Xing, Yuan Ming
T1 - Towards background-free studies of capture reaction in a heavy-ion storage ring
JF - Journal of Physics: Conference Series
N2 - Stored and cooled, highly-charged ions offer unprecedented capabilities for precision studies in the realm of atomic, nuclear structure and astrophysics[1]. After the successful investigation of the 96Ru(p,7)97Rh reaction cross section in 2009[2], the first measurement of the 124Xe(p,7)125Cs reaction cross section has been performed with decelerated, fully-ionized 124Xe ions in 2016 at the Experimental Storage Ring (ESR) of GSI[3]. Using a Double Sided Silicon Strip Detector, introduced directly into the ultra-high vacuum environment of a storage ring, the 125Cs proton-capture products have been successfully detected. The cross section has been measured at 5 different energies between 5.5AMeV and 8AMeV, on the high energy tail of the Gamow-window for hot, explosive scenarios such as supernovae and X-ray binaries. The elastic scattering on the H2 gas jet target is the major source of background to count the (p,7) events. Monte Carlo simulations show that an additional slit system in the ESR in combination with the energy information of the Si detector will enable background free measurements of the proton-capture products. The corresponding hardware is being prepared and will increase the sensitivity of the method tremendously.
Y1 - 2020
VL - 1668
IS - Art 012046
PB - IOP
CY - Bristol
ER -
TY - JOUR
A1 - Ungermanns, C.
A1 - Ahe, M. v. d.
A1 - Carius, Reinhard
A1 - Förster, Arnold
T1 - Optimization of III/V binary growth with RHEED in MOMBE / C. Ungermanns ; M. v. d. Ahe ; R. Carius ; A. Förster ...
JF - Fresenius' Journal of Analytical Chemistry. 358 (1997), H. 1-2
Y1 - 1997
SN - 0937-0633
N1 - ISSN der E-Ausg.: 1432-1130
SP - 101
EP - 104
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 - Tomic, Igor
A1 - Penna, Andrea
A1 - DeJong, Matthew
A1 - Butenweg, Christoph
A1 - Senaldi, Ilaria
A1 - Guerrini, Gabriele
A1 - Malomo, Daniele
A1 - Beyer, Katrin
T1 - Blind predictions of shake table testing of aggregate masonry buildings
T2 - Proceedings of the 17th World Conference on Earthquake Engineering
N2 - In many historical centers in Europe, stone masonry is part of building aggregates, which developed when the layout of the city or village was densified. The analysis of such building aggregates is very challenging and modelling guidelines missing. Advances in the development of analysis methods have been impeded by the lack of experimental data on the seismic response of such aggregates. The SERA project AIMS (Seismic Testing of Adjacent Interacting Masonry Structures) provides such experimental data by testing an aggregate of two buildings under two horizontal components of dynamic excitation. With the aim to advance the modelling of unreinforced masonry aggregates, a blind prediction competition is organized before the experimental campaign. Each group has been provided a complete set of construction drawings, material properties, testing sequence and the list of measurements to be reported. The applied modelling approaches span from equivalent frame models to Finite Element models using shell elements and discrete element models with solid elements. This paper compares the first entries, regarding the modelling approaches, results in terms of base shear, roof displacements, interface openings, and the failure modes.
KW - Historical centres
KW - Stone masonry
KW - Adjacent buildings
KW - Shake table test
KW - Blind prediction competition
Y1 - 2020
N1 - 17th World Conference on Earthquake Engineering, Sendai, Japan, September 27 to October 2, 2021
N1 - (Die Konferenz war ursprünglich für den 13-18 September 2020 angesetzt)
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 - BOOK
A1 - Thielemann, Frank
A1 - Staudt, Erich
A1 - Toberg, M.
A1 - Linné, H.
T1 - Kooperationshandbuch : ein Leitfaden für die Unternehmenspraxis / Staudt, E.; Toberg, M.; Linné, H.; Bock, J.; Thielemann, F.
Y1 - 1992
SN - 3-18-401217-4
N1 - Inhaltsverzeichnis
PB - VDI-Verl. [u.a.]
CY - Düsseldorf
ER -
TY - BOOK
A1 - Thielemann, Frank
A1 - Staudt, Erich
A1 - Schaffner, Michael
T1 - Strategische Kooperationen - ein Weg für die Druckindustrie 2000 ins Medienzeitalter? Ergebnisse einer empirischen Untersuchung zu kooperativen Geschäftsbeziehungen der Druckindustrie / Erich Staudt ; Frank Thielemann ; Michael Schaffner
Y1 - 1996
N1 - Berichte aus der angewandten Innovationsforschung ; 152
PB - Inst. für Angewandte Innovationsforschung e.V.
CY - Bochum
ER -
TY - BOOK
A1 - Thielemann, Frank
A1 - Staudt, Erich
A1 - Kriegesmann, Bernd
A1 - Behrendt, S.
T1 - Kooperationsleitfaden : Planungshilfen und Checklisten zum Management zwischenbetrieblicher Kooperation / Staudt, E.; Kriegesmann, B.; Thielemann, F.; Behrendt, S.
Y1 - 1996
SN - 3-88649-188-9
N1 - Inhaltsverzeichnis
PB - Raabe
CY - Stuttgart [u.a.]
ER -
TY - BOOK
A1 - Thielemann, Frank
A1 - Staudt, Erich
A1 - Kriegesmann, Bernd
A1 - Behrendt, S.
T1 - Kooperation als Erfolgsfaktor ostdeutscher Unternehmen : Ergebnisse einer empirischen Untersuchung zur Kooperationslandschaft in Ostdeutschland / Staudt, E.; Kriegesmann, B.; Thielemann, F.; Behrendt, S.; Chalupsky, J.
Y1 - 1994
N1 - Berichte aus der angewandten Innovationsforschung ; 132 ; Inhaltsverzeichnis
PB - Inst. für Angewandte Innovationsforschung e.V.
CY - Bochum
ER -
TY - BOOK
A1 - Thielemann, Frank
A1 - Staudt, Erich
A1 - Kriegesmann, Bernd
T1 - Joint-ventures. Staudt, Erich; Kriegesmann, Bernd; Thielemann, Frank
Y1 - 1994
N1 - Berichte aus der angewandten Innovationsforschung ; 133
PB - Inst. für Angewandte Innovationsforschung e.V.
CY - Bochum
ER -
TY - BOOK
A1 - Thielemann, Frank
A1 - Staudt, Erich
A1 - Kriegesmann, Bernd
T1 - Qualifikationsbeschaffung im Transformationsprozeß : Ergebnisse einer empirischen Untersuchung in der Druckindustrie / Staudt, Erich; Kriegesmann, Bernd ; Thielemann, Frank
Y1 - 1995
N1 - Berichte aus der angewandten Innovationsforschung ; 135
PB - Inst. für Angewandte Innovationsforschung e.V.
CY - Bochum
ER -