TY  - CHAP
A1  - Teixeira Boura, Cristiano José
A1  - Eckstein, J.
A1  - Felinks, J.
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, S.
T1  - 3-D CFD simulation of an air-sand heat exchanger
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
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  - Damm, Sebastian
A1  - Ritz, Thomas
A1  - Strauch, Jakob
T1  - Adaption of archetype patterns for mobile cloud-based business apps
T2  - 2011 IEEE International Conference on Pervasive Computing and Communications workshops (PerCom workshops 2011) : Seattle, Washington, USA, 21 - 25 March 2011
Y1  - 2011
SN  - 978-1-61284-938-6 (Print)
SN  - 978-1-61284-936-2 (E-Book)
U6  - http://dx.doi.org/10.1109/PERCOMW.2011.5766849
SP  - 100
EP  - 105
PB  - IEEE Service Center
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Siekmann, Thomas
A1  - Müller, Karsten
T1  - Adaptive potential of the stormwater management in urban areas faced by the climate change
T2  - 12th International Conference on Urban Drainage, Porto Alegre/Brazil, 11-16 September 2011
Y1  - 2011
ER  - 
TY  - CHAP
A1  - Baumann, Torsten
A1  - Teixeira Boura, Cristiano José
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, Stefan
A1  - Zunft, Stefan
T1  - Air-sand heat exchanger: materials and flow properties
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  - 
TY  - CHAP
A1  - Pfaff, Raphael
A1  - Larkowski, Tomasz
A1  - Burnham, Keith J.
T1  - An application of adaptive control in the behavioural framework
T2  - 21st International Conference on Systems Engineering (ICSEng) : 16 - 18 Aug. 2011, Las Vegas, Nevada ; proceedings
Y1  - 2011
SN  - 978-1-4577-1078-0 ; 978-0-7695-4495-3
SP  - 49
EP  - 54
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Becker, Jörg
A1  - Bergener, Philipp
A1  - Breuker, Dominic
A1  - Delfmann, Patrick
A1  - Eggert, Mathias
T1  - An Efficient Business Process Compliance Checking Approach
T2  - Governance and Sustainability in Information Systems. Managing the Transfer and Diffusion of IT : IFIP WG 8.6 International Working Conference, Hamburg, Germany, September 22-24, 2011. Proceedings
Y1  - 2011
U6  - http://dx.doi.org/10.1007/978-3-642-24148-2_19
SP  - 282
EP  - 287
PB  - Springer
CY  - Berlin, Heidelberg
ER  - 
TY  - CHAP
A1  - Loeb, Horst W.
A1  - Schartner, Karl-Heinz
A1  - Dachwald, Bernd
A1  - Ohndorf, Andreas
A1  - Seboldt, Wolfgang
T1  - An Interstellar – Heliopause mission using a combination of solar/radioisotope electric propulsion
T2  - Presented at the 32nd International Electric Propulsion Conference
N2  - There is common agreement within the scientific community that in order to understand our local galactic environment it will be necessary to send a spacecraft into the region beyond the solar wind termination shock. Considering distances of 200 AU for a new mission, one needs a spacecraft travelling at a speed of close to 10 AU/yr in order to keep the mission duration in the range of less than 25 yrs, a transfer time postulated by ESA.Two propulsion options for the mission have been proposed and discussed so far: the solar sail propulsion and the ballistic/radioisotope electric propulsion. As a further alternative, we here investigate a combination of solar-electric propulsion and radioisotope-electric propulsion. The solar-electric propulsion stage consists of six 22 cm diameter “RIT-22”ion thrusters working with a high specific impulse of 7377 s corresponding to a positive grid voltage of 5 kV. Solar power of 53 kW BOM is provided by a light-weight solar array. The REP-stage consists of four space-proven 10 cm diameter “RIT-10” ion thrusters that will be operating one after the other for 9 yrs in total. Four advanced radioisotope generators provide 648 W at BOM. The scientific instrument package is oriented at earlier studies. For its mass and electric power requirement 35 kg and 35 W are assessed, respectively. Optimized trajectory calculations, treated in a separate contribution, are based on our “InTrance” method.The program yields a burn out of the REP stage in a distance of 79.6 AU for a usage of 154 kg of Xe propellant. With a C3 = 45,1 (km/s)2 a heliocentric probe velocity of 10 AU/yr is reached at this distance, provided a close Jupiter gravity assist adds a velocity increment of 2.7 AU/yr. A transfer time of 23.8 yrs results for this scenario requiring about 450 kg Xe for the SEP stage, jettisoned at 3 AU. We interpret the SEP/REP propulsion as a competing alternative to solar sail and ballistic/REP propulsion. Omiting a Jupiter fly-by even allows more launch flexibility, leaving the mission duration in the range of the ESA specification.
Y1  - 2011
N1  - 32nd International Electric Propulsion Conference, 11-15 September. Wiesbaden, Germany
SP  - 1
EP  - 7
ER  - 
TY  - CHAP
A1  - Stieglitz, Kristian
A1  - Wollert, Jörg
T1  - Approach of using ultra-wideband-radio in industrial real-time ethernet networks
T2  - The 4th International Multi-Conference on Engineering and Technological Innovation : IMETI : July 19th - July 22nd, 2011, Orlando, Florida, USA
Y1  - 2011
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Fuchs, Britta
A1  - Ritz, Thomas
A1  - Halbach, Bastian
A1  - Hartl, Florian
ED  - Marca, David A.
T1  - Blended shopping : interactivity and individualization
T2  - Proceedings of the International Conference on e-Business : Seville, Spain, 18 - 21 July 2011 ; [... integrated in the ICETE (International Conference on e-Business and Telecommunications) joint conference]
Y1  - 2011
SN  - 978-989-8425-70-6
SP  - 47
EP  - 52
PB  - SciTePress
CY  - [Lissabon]
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
A1  - Rau, Christoph
A1  - Sattler, Johannes, Christoph
T1  - Choice of solar share of a hybrid power plant of a central receiver system and a biogas plant in dependency of the geographical latitude
T2  - World Renewable Energy Congress-Sweden : 8 -13 May, 2011, Linköping, Sweden / ed.: Bahram Moshfegh
Y1  - 2011
SN  - 9789173930703
SP  - 3710
EP  - 3717
PB  - Univ. Electronic Pr.
CY  - Linköping
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
A1  - Rau, Christoph
T1  - Comparison of steady-state and transient simulations for solar tower power plants with open-volumetric receiver
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  - 
TY  - CHAP
A1  - Bragard, Michael
A1  - Gottschlich, J.
A1  - De Doncker, R. W.
T1  - Design and realization of a credit card size driver stage for high power thyristor based devices with integrated MOS structure
T2  - 2011 IEEE 8th International Conference on Power Electronics and ECCE Asia (ICPE & ECCE 2011) : Jeju, South Korea, 30 May 2011 - 3 June 2011 / [co-sponsored by the Korean Institute of Power Electronics ...]
Y1  - 2011
SN  - 978-1-61284-958-4 (Print)
SN  - 978-1-61284-956-0 (Online)
U6  - http://dx.doi.org/10.1109/ICPE.2011.5944661
SP  - 1182
EP  - 1189
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Achenbach, Timm
A1  - Göttsche, Joachim
A1  - Kaufhold, O.
A1  - Hoffschmidt, Bernhard
T1  - Development of an edge module for open volumetric receiver for the use of the radiation at the receiver boundary region
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  - 
TY  - CHAP
A1  - Hirsch, Tobias
A1  - Ahlbrink, Nils
A1  - Pitz-Paal, Robert
A1  - Teixeira Boura, Cristiano José
A1  - Hoffschmidt, Bernhard
A1  - Gall, Jan
A1  - Abel, Dirk
A1  - Nolte, Vera
A1  - Wirsum, Manfred
A1  - Andersson, Joel
A1  - Diehl, Moritz
T1  - Dynamic simulation of a solar tower system with open volumetric receiver - a review on the ViCERP project
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  - 
TY  - CHAP
A1  - Usai, Pierpaolo
A1  - Corucci, Alessandro
A1  - Gligorevic, Snjezana
A1  - Monorchio, Agostino
T1  - Estimation of airport surface propagation channel: ray tracing model and measurements
T2  - Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP) : 11 - 15 April 2011, Rome, Italy
Y1  - 2011
SN  - 978-1-4577-0250-1
SP  - 1634
EP  - 1638
ER  - 
TY  - CHAP
A1  - Ohndorf, Andreas
A1  - Dachwald, Bernd
A1  - Seboldt, Wolfgang
A1  - Schartner, Karl-Heinz
T1  - Flight times to the heliopause using a combination of solar and radioisotope electric propulsion
T2  - 32nd International Electric Propulsion Conference
N2  - We investigate the interplanetary flight of a low-thrust space probe to the heliopause,located at a distance of about 200 AU from the Sun. Our goal was to reach this distance within the 25 years postulated by ESA for such a mission (which is less ambitious than the 15-year goal set by NASA). Contrary to solar sail concepts and combinations of allistic and electrically propelled flight legs, we have investigated whether the set flight time limit could also be kept with a combination of solar-electric propulsion and a second, RTG-powered upper stage. The used ion engine type was the RIT-22 for the first stage and the RIT-10 for the second stage. Trajectory optimization was carried out with the low-thrust optimization program InTrance, which implements the method of Evolutionary Neurocontrol,using Artificial Neural Networks for spacecraft steering and Evolutionary Algorithms to optimize the Neural Networks’ parameter set. Based on a parameter space study, in which the number of thrust units, the unit’s specific impulse, and the relative size of the solar power generator were varied, we have chosen one configuration as reference. The transfer time of this reference configuration was 29.6 years and the fastest one, which is technically
more challenging, still required 28.3 years. As all flight times of this parameter study were longer than 25 years, we further shortened the transfer time by applying a launcher-provided hyperbolic excess energy up to 49 km2/s2. The resulting minimal flight time for the reference configuration was then 27.8 years. The following, more precise optimization to a launch with the European Ariane 5 ECA rocket reduced the transfer time to 27.5 years. This is the fastest mission design of our study that is flexible enough to allow a launch every
year. The inclusion of a fly-by at Jupiter finally resulted in a flight time of 23.8 years,which is below the set transfer-time limit. However, compared to the 27.5-year transfer,this mission design has a significantly reduced launch window and mission flexibility if the
escape direction is restricted to the heliosphere’s “nose".
KW  - low-thrust trajectory optimization
KW  - heliosphere
KW  - ion propulsion
Y1  - 2011
N1  - IEPC-2011-051
32nd International Electric Propulsion Conference,September 11–15, 2011
Wiesbaden, Germany
SP  - 1
EP  - 12
ER  - 
TY  - CHAP
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
A1  - Feldmann, Markus
T1  - Floor systems - key elements for sustainable multi-storey buildings
T2  - SB11 Helsinki World Sustainable Building Conference : 18. - 21.10.2011
Y1  - 2011
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Olaru, Alexandra Maria
A1  - Kowalski, Julia
A1  - Sethi, Vaishali
A1  - Blümich, Bernhard
T1  - Fluid Transport in Porous Media probed by Relaxation-Exchange NMR
T2  - 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec.
Y1  - 2011
N1  - H12B-07; American Geophysical Union
ER  - 
TY  - CHAP
A1  - Schiffer, Stefan
A1  - Ferrein, Alexander
A1  - Lakemeyer, Gerhard
T1  - Fuzzy representations and control for domestic service robots in Golog
T2  - Intelligent robotics and applications : 4th International conference, ICIRA 2011, Aachen, Germany, December 6-8, 2011, proceedings, part I. (Lecture notes in computer science ; 7102)
Y1  - 2011
SN  - 978-3-642-25486-4
SP  - 241
EP  - 250
ER  -