@article{Bung2011, author = {Bung, Daniel Bernhard}, title = {Developing flow in skimming flow regime on embankment stepped spillways}, series = {Journal of hydraulic research}, volume = {Vol. 49}, journal = {Journal of hydraulic research}, number = {Iss. 5}, publisher = {Taylor \& Francis}, address = {London}, issn = {1814-2079 (E-Journal); 0022-1686 (Print)}, pages = {639 -- 648}, year = {2011}, language = {en} } @article{FerreinMaraisPotgieteretal.2011, author = {Ferrein, Alexander and Marais, Stephen and Potgieter, Anet and Steinbauer, Gerald}, title = {RoboCup Junior: A vehicle for S\&T education in Africa?}, publisher = {IEEE}, address = {New York}, isbn = {978-1-61284-992-8}, pages = {1 -- 6}, year = {2011}, language = {en} } @inproceedings{SchifferFerreinLakemeyer2011, author = {Schiffer, Stefan and Ferrein, Alexander and Lakemeyer, Gerhard}, title = {Fuzzy representations and control for domestic service robots in Golog}, series = {Intelligent robotics and applications : 4th International conference, ICIRA 2011, Aachen, Germany, December 6-8, 2011, proceedings, part I. (Lecture notes in computer science ; 7102)}, booktitle = {Intelligent robotics and applications : 4th International conference, ICIRA 2011, Aachen, Germany, December 6-8, 2011, proceedings, part I. (Lecture notes in computer science ; 7102)}, isbn = {978-3-642-25486-4}, pages = {241 -- 250}, year = {2011}, language = {en} } @inproceedings{AhmedSchlenkhoffBung2011, author = {Ahmed, H. and Schlenkhoff, A. and Bung, Daniel Bernhard}, title = {Hydrodynamic characteristics of vertical slotted wall breakwaters}, series = {Balance and uncertainty - water in a changing world : proceedings of the 34th IAHR world congress ; 33rd Hydrology and Water Resources Symposium ; 10th Conference on Hydraulics in Water Engineering ; 26 June - 1 July 2011, Brisbane, Australia}, booktitle = {Balance and uncertainty - water in a changing world : proceedings of the 34th IAHR world congress ; 33rd Hydrology and Water Resources Symposium ; 10th Conference on Hydraulics in Water Engineering ; 26 June - 1 July 2011, Brisbane, Australia}, organization = {International Association for Hydraulic Engineering and Research}, isbn = {978-0-85825-868-6}, pages = {1179 -- 1186}, year = {2011}, language = {en} } @article{PreissLinderWendtetal.2011, author = {Preiß, C. and Linder, Peter and Wendt, K. and Krystek, M. and Digel, Ilya and Gossmann, Matthias and Temiz Artmann, Ayseg{\"u}l and Porst, Dariusz and Kayser, Peter and Bassam, Rasha and Artmann, Gerhard}, title = {Engineering technology for plant physiology and plant stress research}, year = {2011}, abstract = {Plant physiology and plant stress: Plant physiology will be much more important for human mankind because of yield and cultivation limits of crops determined by their resistance to stress. To assess and counteract various stress factors it is necessary to conduct plant research to gain information and results on plant physiology.}, subject = {Pflanzenphysiologie}, language = {en} } @incollection{KurzZebner2011, author = {Kurz, Melanie and Zebner, Frank}, title = {Zum Verh{\"a}ltnis von Design und Technik}, series = {Design, Anfang des 21 Jh. : Diskurse und Perspektiven}, booktitle = {Design, Anfang des 21 Jh. : Diskurse und Perspektiven}, editor = {Eisele, Petra and B{\"u}rdek, Bernhard E.}, publisher = {avedition}, address = {Ludwigsburg}, isbn = {978-3-89986-150-1}, pages = {174 -- 185}, year = {2011}, language = {de} } @inproceedings{RahierRitzWallenborn2011, author = {Rahier, Michael and Ritz, Thomas and Wallenborn, Ramona}, title = {Ortsbezogene Anwendungen und Dienste im eCarSharing}, series = {8. GI-ITG-KuVS-Fachgespr{\"a}ch Ortsbezogene Anwendungen und Dienste}, booktitle = {8. GI-ITG-KuVS-Fachgespr{\"a}ch Ortsbezogene Anwendungen und Dienste}, publisher = {Logos-Verl.}, address = {Berlin}, isbn = {978-3-8325-3041-9}, pages = {61 -- 74}, year = {2011}, language = {de} } @inproceedings{FuchsRitzHalbachetal.2011, author = {Fuchs, Britta and Ritz, Thomas and Halbach, Bastian and Hartl, Florian}, title = {Blended shopping : interactivity and individualization}, series = {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]}, booktitle = {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]}, editor = {Marca, David A.}, publisher = {SciTePress}, address = {[Lissabon]}, isbn = {978-989-8425-70-6}, pages = {47 -- 52}, year = {2011}, language = {en} } @article{SiekerNeunerDimitrovaetal.2011, author = {Sieker, Tim and Neuner, Andreas and Dimitrova, Darina and Tippk{\"o}tter, Nils and Muffler, Kai and Bart, Hans-J{\"o}rg and Heinzle, Elmar and Ulber, Roland}, title = {Ethanol production from grass silage by simultaneous pretreatment, saccharification and fermentation: First steps in the process development}, series = {Engineering in Life Sciences}, volume = {11}, journal = {Engineering in Life Sciences}, number = {4}, publisher = {Wiley}, address = {Weinheim}, doi = {10.1002/elsc.201000160}, pages = {436 -- 442}, year = {2011}, abstract = {Grass silage provides a great potential as renewable feedstock. Two fractions of the grass silage, a press juice and the fiber fraction, were evaluated for their possible use for bioethanol production. Direct production of ethanol from press juice is not possible due to high concentrations of organic acids. For the fiber fraction, alkaline peroxide or enzymatic pretreatment was used, which removes the phenolic acids in the cell wall. In this study, we demonstrate the possibility to integrate the enzymatic pretreatment with a simultaneous saccharification and fermentation to achieve ethanol production from grass silage in a one-process step. Achieved yields were about 53 g ethanol per kg silage with the alkaline peroxide pretreatment and 91 g/kg with the enzymatic pretreatment at concentrations of 8.5 and 14.6 g/L, respectively. Furthermore, it was shown that additional supplementation of the fermentation medium with vitamins, trace elements and nutrient salts is not necessary when the press juice is directly used in the fermentation step.}, language = {en} } @incollection{Fabo2011, author = {Fabo, Sabine}, title = {REMOTEWORDS - in Erwartung des großen Beobachters}, series = {Hacking the city : Interventionen in urbanen und kommunikativen R{\"a}umen ; Museum Folkwang, [16. Juli - 26. September 2010]}, booktitle = {Hacking the city : Interventionen in urbanen und kommunikativen R{\"a}umen ; Museum Folkwang, [16. Juli - 26. September 2010]}, editor = {Schmidt, Sabine Maria}, publisher = {Steidl ; Edition Folkwang}, address = {G{\"o}ttingen [u.a.]}, isbn = {978-3-86930-187-7}, pages = {130 -- 133}, year = {2011}, subject = {Streetart}, language = {de} } @inproceedings{VaessenAlexopoulosKluczkaetal.2011, author = {Vaeßen, Christiane and Alexopoulos, Spiros and Kluczka, Sven and Sattler, Johannes Christoph and Roeb, M. and Neises, M. and Abdellatif, T.}, title = {Analyse der Verfahren zur solaren Methanolproduktion aus CO2}, series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster}, publisher = {DLR}, address = {K{\"o}ln}, pages = {2 S.}, year = {2011}, language = {de} } @article{WarerkarSchmitzGoettscheetal.2011, author = {Warerkar, Shashikant and Schmitz, Stefan and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Reißel, Martin and Tamme, Rainer}, title = {Air-Sand Heat Exchanger for High-Temperature Storage}, series = {Journal of Solar Energy Engineering. 133 (2011), H. 2}, journal = {Journal of Solar Energy Engineering. 133 (2011), H. 2}, publisher = {ASME}, address = {New York}, isbn = {0199-6231}, pages = {021010}, year = {2011}, language = {en} } @article{DoorschodtSchreinemachersBehbahanietal.2011, author = {Doorschodt, B. M. and Schreinemachers, M. C. J. M. and Behbahani, Mehdi and Florquin, S. and Weis, J. and Staat, Manfred and Tolba, R. H.}, title = {Hypothermic machine perfusion of kidney grafts: which pressure is preferred}, series = {Annals of Biomedical Engineering. 39 (2011), H. 3}, journal = {Annals of Biomedical Engineering. 39 (2011), H. 3}, publisher = {Springer}, address = {Berlin}, isbn = {1573-9686}, pages = {1051 -- 1059}, year = {2011}, language = {en} } @inproceedings{OhndorfDachwaldSeboldtetal.2011, author = {Ohndorf, Andreas and Dachwald, Bernd and Seboldt, Wolfgang and Schartner, Karl-Heinz}, title = {Flight times to the heliopause using a combination of solar and radioisotope electric propulsion}, series = {32nd International Electric Propulsion Conference}, booktitle = {32nd International Electric Propulsion Conference}, pages = {1 -- 12}, year = {2011}, abstract = {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".}, language = {en} } @inproceedings{BaumannTeixeiraBouraEcksteinetal.2011, author = {Baumann, Torsten and Teixeira Boura, Cristiano Jos{\´e} and Eckstein, Julian and Felinks, Jan and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, Stefan and Zunft, Stefan}, title = {Air-sand heat exchanger}, series = {6th International Renewable Energy Storage Conference (IRES 2011) : November 28 - 30, 2011, bcc Berlin Congress Center, Berlin, Germany / EUROSOLAR ...}, booktitle = {6th International Renewable Energy Storage Conference (IRES 2011) : November 28 - 30, 2011, bcc Berlin Congress Center, Berlin, Germany / EUROSOLAR ...}, publisher = {Eurosolar}, address = {Bonn}, pages = {1 CD-ROM}, year = {2011}, language = {de} } @article{ScholzRomagnoliDachwaldetal.2011, author = {Scholz, Christina and Romagnoli, Daniele and Dachwald, Bernd and Theil, Stephan}, title = {Performance analysis of an attitude control system for solar sails using sliding masses}, series = {Advances in Space Research}, volume = {48}, journal = {Advances in Space Research}, number = {11}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0273-1177}, pages = {1822 -- 1835}, year = {2011}, language = {en} } @incollection{HahnKellyMuffleretal.2011, author = {Hahn, Thomas and Kelly, Svenja and Muffler, Kai and Tippk{\"o}tter, Nils and Ulber, Roland}, title = {Extraction of lignocellulose and algae for the production of bulk and fine chemicals}, series = {Industrial scale natural products extraction}, booktitle = {Industrial scale natural products extraction}, editor = {Hans-J{\"o}rg, Bart and Pilz, Stephan}, publisher = {Wiley-VCH}, address = {Weinheim}, isbn = {978-3-527-32504-7 (Print)}, doi = {10.1002/9783527635122}, pages = {221 -- 245}, year = {2011}, language = {en} } @inproceedings{BaumannTeixeiraBouraGoettscheetal.2011, author = {Baumann, Torsten and Teixeira Boura, Cristiano Jos{\´e} and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, Stefan and Zunft, Stefan}, title = {Air-sand heat exchanger: materials and flow properties}, series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, address = {Granada}, pages = {1 CD-ROM}, year = {2011}, language = {en} } @inproceedings{FrickeZiolkoAnthrakidisetal.2011, author = {Fricke, Barbara and Ziolko, C. and Anthrakidis, Anette and Alexopoulos, Spiros and Hoffschmidt, Bernhard and Dillig, M. and Giese, F.}, title = {InnoSol - life cycle analysis of solar power tower plants}, series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain}, address = {Granada}, pages = {1 CD-ROM}, year = {2011}, language = {en} } @article{LeversStaatLaack2011, author = {Levers, A. and Staat, Manfred and Laack, Walter van}, title = {Analyse der Langzeitwirkung der MBST® KernspinResonanzTherapie bei Gonarthrose}, year = {2011}, abstract = {Originalausgabe: Orthop{\"a}dische Praxis Jg. 47. 2011 H. 11; S. 536-543. Mit freundlicher Genehmigung des Verlags Zusammenfassung: Auf der Basis von Patientenabfragen mittels Fragebogen zum Schmerzempfinden und zur Einschr{\"a}nkung bei Aktivit{\"a}ten des allt{\"a}glichen Lebens wird die Langzeitwirkung der MBST® KernspinResonanz-Therapie bei Gonarthrose untersucht. An der Studie nahmen 39 Patienten teil, bei denen die Therapie bis zu vier Jahre zur{\"u}ckliegt. Neben einer Gesamtbetrachtung wird der Erfolg auch in Abh{\"a}ngigkeit von Alter, Geschlecht und sportlicher Aktivit{\"a}t analysiert. Insgesamt weist die Studie auf eine anhaltende Verbesserung des Gesundheitszustands mit zum Teil deutlicher Schmerzlinderung auch noch nach vier Jahren hin, jedoch mit einer leichten Schmerzzunahme gegen Ende des Untersuchungszeitraums von vier Jahren. Eine tendenziell positivere Wirkung bei Frauen, {\"a}lteren Menschen oder auch sportlich nicht-aktiven Patienten l{\"a}sst auf eine m{\"o}gliche Beeinflussung des Erfolgs der Therapie durch ({\"U}ber-)Belastung im Alltag schließen. Ein zus{\"a}tzlich positiver Effekt der Therapie auf die Knochendichte ist ebenfalls denkbar, dies bleibt jedoch offen.}, subject = {Kniegelenkarthrose}, language = {de} }