@misc{RothkranzKrafftTippkoetter2022, author = {Rothkranz, Berit and Krafft, Simone and Tippk{\"o}tter, Nils}, title = {Media optimization for sustainable fuel production: How to produce biohydrogen from renewable resources with Thermotoga neapolitana}, series = {Chemie Ingenieur Technik}, volume = {94}, journal = {Chemie Ingenieur Technik}, number = {9}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0009-286X}, doi = {10.1002/cite.202255305}, pages = {1298 -- 1299}, year = {2022}, abstract = {Hydrogen is playing an increasingly important role in research and politics as an energy carrier of the future. Since hydrogen has commonly been produced from methane by steam reforming, the need for climate-friendly, alternative production routes is emerging. In addition to electrolysis, fermentative routes for the production of so-called biohydrogen are "green" alternatives. The application of microorganisms offers the advantage of sustainable production from renewable resources using easily manageable technologies. In this project, the hyperthermophilic, anaerobic microorganism Thermotoga neapolitana is used for the productio nof biohydrogen from renewable resources. The enzymatically hydrolyzed resources were used in fermentation leading to yield coefficients of 1.8 mole H₂ per mole glucose when using hydrolyzed straw and ryegrass supplemented with medium, respectively. These results are similar to the hydrogen yields when using Thermotoga basal medium with glucose (TBGY) as control group. In order to minimize the supplementation of the hydrolysate and thus increase the economic efficiency of the process, the essential media components were identified. The experiments revealed NaCl, KCl, and glucose as essential components for cell growth as well as biohydrogen production. When excluding NaCl, a decrease of 96\% in hydrogen production occured.}, language = {en} } @article{RothTippkoetter2016, author = {Roth, Jasmine and Tippk{\"o}tter, Nils}, title = {Evaluation of lignocellulosic material for butanol production using enzymatic hydrolysate medium}, series = {Cellulose Chemistry and Technology}, volume = {50}, journal = {Cellulose Chemistry and Technology}, number = {3-4}, publisher = {Editura Academiei Romane}, address = {Bukarest}, pages = {405 -- 410}, year = {2016}, abstract = {Butanol is a promising gasoline additive and platform chemical that can be readily produced via acetone-butanolethanol (ABE) fermentation from pretreated lignocellulosic materials. This article examines lignocellulosic material from beech wood for ABE fermentation, using Clostridium acetobutylicum. First, the utilization of both C₅₋ (xylose) and C₆₋ (glucose) sugars as sole carbon source was investigated in static cultivation, using serum bottles and synthetic medium. The utilization of pentose sugar resulted in a solvent yield of 0.231 g·g_sugar⁻¹, compared to 0.262 g·g_sugar⁻¹ using hexose. Then, the Organosolv pretreated crude cellulose fibers (CF) were enzymatically decomposed, and the resulting hydrolysate medium was analyzed for inhibiting compounds (furans, organic acids, phenolics) and treated with ionexchangers for detoxification. Batch fermentation in a bioreactor using CF hydrolysate medium resulted in a total solvent yield of 0.20 gABE·g_sugar⁻¹.}, language = {en} } @misc{RothTippkoetter2016, author = {Roth, J. and Tippk{\"o}tter, Nils}, title = {New Approach for Enzymatic Hydrolysis of Lignocellulose with Selective Diffusion Separation of the Monosaccharide Products}, series = {Chemie Ingenieur Technik}, volume = {88}, journal = {Chemie Ingenieur Technik}, number = {9}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0009-286X}, doi = {10.1002/cite.201650301}, pages = {1237}, year = {2016}, abstract = {Enzymatic hydrolysis of lignocellulosic material plays an important role in the classical biorefinery approach. Apart from the pretreatment of the raw material, hydrolysis is the basis for the conversion of the cellulose and hemicellulose fraction into fermentable sugars. After hydrolysis, usually a solid-liquid separation takes place, in order to separate the residual plant material from the sugar-rich fraction, which can be subsequently used in a fermentation step. In order to factor out the separation step, the usage of in alginate immobilized crude cellulose fiber beads (CFBs) were evaluated. Pretreated cellulose fibers are incorporated in an alginate matrix together with the relevant enzymes. In doing so, sugars diffuse trough the alginate matrix, allowing a simplified delivery into the surrounding fluid. This again reduces product inhibition of the glucose on the enzyme catalysts. By means of standardized bead production the hydrolysis in lab scale was possible. First results show that liberation of glucose and xylose is possible, allowing a maximum total sugar yield of 75 \%.}, language = {en} } @inproceedings{RothMoehringTippkoetter2016, author = {Roth, J. and M{\"o}hring, S. and Tippk{\"o}tter, Nils}, title = {Characterization and evaluation of lignocellulosic biomass 130 hydrolysates for ABE fermentation}, series = {New frontiers of biotech-processes (Himmelfahrtstagung) : 02-04 May 2016, Rhein-Mosel-Halle, Koblenz/Germany}, booktitle = {New frontiers of biotech-processes (Himmelfahrtstagung) : 02-04 May 2016, Rhein-Mosel-Halle, Koblenz/Germany}, publisher = {DECHEMA}, address = {Frankfurt am Main}, pages = {130}, year = {2016}, language = {en} } @article{RossiWinandsButenweg2022, author = {Rossi, Leonardo and Winands, Mark H. M. and Butenweg, Christoph}, title = {Monte Carlo Tree Search as an intelligent search tool in structural design problems}, series = {Engineering with Computers : An International Journal for Simulation-Based Engineering}, volume = {38}, journal = {Engineering with Computers : An International Journal for Simulation-Based Engineering}, number = {4}, editor = {Zhang, Jessica}, publisher = {Springer Nature}, address = {Cham}, issn = {1435-5663}, doi = {10.1007/s00366-021-01338-2}, pages = {3219 -- 3236}, year = {2022}, abstract = {Monte Carlo Tree Search (MCTS) is a search technique that in the last decade emerged as a major breakthrough for Artificial Intelligence applications regarding board- and video-games. In 2016, AlphaGo, an MCTS-based software agent, outperformed the human world champion of the board game Go. This game was for long considered almost infeasible for machines, due to its immense search space and the need for a long-term strategy. Since this historical success, MCTS is considered as an effective new approach for many other scientific and technical problems. Interestingly, civil structural engineering, as a discipline, offers many tasks whose solution may benefit from intelligent search and in particular from adopting MCTS as a search tool. In this work, we show how MCTS can be adapted to search for suitable solutions of a structural engineering design problem. The problem consists of choosing the load-bearing elements in a reference reinforced concrete structure, so to achieve a set of specific dynamic characteristics. In the paper, we report the results obtained by applying both a plain and a hybrid version of single-agent MCTS. The hybrid approach consists of an integration of both MCTS and classic Genetic Algorithm (GA), the latter also serving as a term of comparison for the results. The study's outcomes may open new perspectives for the adoption of MCTS as a design tool for civil engineers.}, language = {en} } @article{RossiStupazziniParisietal.2019, author = {Rossi, Leonardo and Stupazzini, Marco and Parisi, Davide and Holtschoppen, Britta and Ruggieri, Gabriella and Butenweg, Christoph}, title = {Empirical fragility functions and loss curves for long-span-beam buildings based on the 2012 Emilia-Romagna earthquake official database}, series = {Bulletin of Earthquake Engineering}, volume = {18}, journal = {Bulletin of Earthquake Engineering}, publisher = {Springer Nature}, issn = {1573-1456}, doi = {10.1007/s10518-019-00759-1}, pages = {1693 -- 1721}, year = {2019}, abstract = {The 2012 Emilia-Romagna earthquake, that mainly struck the homonymous Italian region provoking 28 casualties and damage to thousands of structures and infrastructures, is an exceptional source of information to question, investigate, and challenge the validity of seismic fragility functions and loss curves from an empirical standpoint. Among the most recent seismic events taking place in Europe, that of Emilia-Romagna is quite likely one of the best documented, not only in terms of experienced damages, but also for what concerns occurred losses and necessary reconstruction costs. In fact, in order to manage the compensations in a fair way both to citizens and business owners, soon after the seismic sequence, the regional administrative authority started (1) collecting damage and consequence-related data, (2) evaluating information sources and (3) taking care of the cross-checking of various reports. A specific database—so-called Sistema Informativo Gestione Europa (SFINGE)—was devoted to damaged business activities. As a result, 7 years after the seismic events, scientists can rely on a one-of-a-kind, vast and consistent database, containing information about (among other things): (1) buildings' location and dimensions, (2) occurred structural damages, (3) experienced direct economic losses and (4) related reconstruction costs. The present work is focused on a specific data subset of SFINGE, whose elements are Long-Span-Beam buildings (mostly precast) deployed for business activities in industry, trade or agriculture. With the available set of data, empirical fragility functions, cost and loss ratio curves are elaborated, that may be included within existing Performance Based Earthquake Engineering assessment toolkits.}, language = {en} } @article{RossiParisiCasarietal.2019, author = {Rossi, Leonardo and Parisi, Davide and Casari, Chiara and Montanari, Luca and Ruggieri, Gabriella and Holtschoppen, Britta and Butenweg, Christoph}, title = {Empirical Data about Direct Economic Consequences of Emilia-Romagna 2012 Earthquake on Long-Span-Beam Buildings}, series = {Earthquake Spectra}, volume = {35}, journal = {Earthquake Spectra}, number = {4}, issn = {1944-8201}, doi = {10.1193/100118EQS224DP}, pages = {1979 -- 2001}, year = {2019}, language = {en} } @article{RossiHoltschoppenButenweg2019, author = {Rossi, Leonardo and Holtschoppen, Britta and Butenweg, Christoph}, title = {Official data on the economic consequences of the 2012 Emilia-Romagna earthquake: a first analysis of database SFINGE}, series = {Bulletin of Earthquake Engineering}, volume = {17}, journal = {Bulletin of Earthquake Engineering}, number = {9}, publisher = {Springer}, address = {Berlin}, doi = {10.1007\%2Fs10518-019-00655-8}, pages = {4855 -- 4884}, year = {2019}, language = {en} } @misc{RossJonesTeumerCapitainetal.2018, author = {Ross-Jones, J. and Teumer, T. and Capitain, C. and Tippk{\"o}tter, Nils and Krause, M. J. and Methner, F.-J. and R{\"a}dle, M.}, title = {Analytical methods for in-line characterization of beer haze}, series = {Trends in Brewing}, journal = {Trends in Brewing}, year = {2018}, abstract = {In most beers, producers strive to minimize haze to maximize visual appeal. To detect the formation of particulates, a measurement system for sub-micron particles is required. Beer haze is naturally occurring, composed of protein or polyphenol particles; in their early stage of growth their size is smaller than 2 µm. Microscopy analysis is time and resource intensive; alternatively, backscattering is an inexpensive option for detecting particle sizes of interest.}, language = {en} } @article{RossPlummerRodeetal.2010, author = {Ross, Jillian and Plummer, Simon M. and Rode, Anja and Scheer, Nico and Bower, Conrad C. and Vogel, Ortwin and Henderson, Colin J. and Wolf, C. Roland and Elcombe, Clifford R.}, title = {Human constitutive androstane receptor (CAR) and pregnane X receptor (PXR) support the hypertrophic but not the hyperplastic response to the murine nongenotoxic hepatocarcinogens phenobarbital and chlordane in vivo}, series = {Toxicological Sciences}, volume = {116}, journal = {Toxicological Sciences}, number = {2}, publisher = {Oxford University Press}, address = {Oxford}, issn = {1096-0929}, doi = {10.1093/toxsci/kfq118}, pages = {452 -- 466}, year = {2010}, abstract = {Mouse nongenotoxic hepatocarcinogens phenobarbital (PB) and chlordane induce hepatomegaly characterized by hypertrophy and hyperplasia. Increased cell proliferation is implicated in the mechanism of tumor induction. The relevance of these tumors to human health is unclear. The xenoreceptors, constitutive androstane receptors (CARs), and pregnane X receptor (PXR) play key roles in these processes. Novel "humanized" and knockout models for both receptors were developed to investigate potential species differences in hepatomegaly. The effects of PB (80 mg/kg/4 days) and chlordane (10 mg/kg/4 days) were investigated in double humanized PXR and CAR (huPXR/huCAR), double knockout PXR and CAR (PXRKO/CARKO), and wild-type (WT) C57BL/6J mice. In WT mice, both compounds caused increased liver weight, hepatocellular hypertrophy, and cell proliferation. Both compounds caused alterations to a number of cell cycle genes consistent with induction of cell proliferation in WT mice. However, these gene expression changes did not occur in PXRKO/CARKO or huPXR/huCAR mice. Liver hypertrophy without hyperplasia was demonstrated in the huPXR/huCAR animals in response to both compounds. Induction of the CAR and PXR target genes, Cyp2b10 and Cyp3a11, was observed in both WT and huPXR/huCAR mouse lines following treatment with PB or chlordane. In the PXRKO/CARKO mice, neither liver growth nor induction of Cyp2b10 and Cyp3a11 was seen following PB or chlordane treatment, indicating that these effects are CAR/PXR dependent. These data suggest that the human receptors are able to support the chemically induced hypertrophic responses but not the hyperplastic (cell proliferation) responses. At this time, we cannot be certain that hCAR and hPXR when expressed in the mouse can function exactly as the genes do when they are expressed in human cells. However, all parameters investigated to date suggest that much of their functionality is maintained.}, language = {en} } @inproceedings{RosinKubalskiButenweg2014, author = {Rosin, Julia and Kubalski, Thomas and Butenweg, Christoph}, title = {Seismic Design of cylindrical liquid storage tanks}, series = {Seismic design of industrial facilities : proceedings of the International Conference on Seismic Design of Industrial Facilities (SeDIF-Conference) ; [Aachen, 26. - 27. September 2013] / Chair of Structural Statics and Dynamics, RWTH Aachen. Sven Klinkel ..., ed.}, booktitle = {Seismic design of industrial facilities : proceedings of the International Conference on Seismic Design of Industrial Facilities (SeDIF-Conference) ; [Aachen, 26. - 27. September 2013] / Chair of Structural Statics and Dynamics, RWTH Aachen. Sven Klinkel ..., ed.}, publisher = {Springer Vieweg}, address = {Wiesbaden}, organization = {International Conference on Seismic Design of Industrial Facilities <2013, Aachen>}, isbn = {978-3-658-02810-7 (E-Book) ; 978-3-658-02809-1 (Print)}, doi = {10.1007/978-3-658-02810-7_36}, pages = {429 -- 440}, year = {2014}, language = {en} } @inproceedings{RosinKubalskiButenweg2013, author = {Rosin, Julia and Kubalski, Thomas and Butenweg, Christoph}, title = {Seismic isolation of cylindrical liquid storage tanks}, series = {Seismic design of industrial facilities}, booktitle = {Seismic design of industrial facilities}, editor = {Klinkel, Sven and Butenweg, Christoph and Lin, Gao and Holtschoppen, Britta}, publisher = {Springer Vieweg}, address = {Wiesbaden}, isbn = {978-3-658-02810-7}, doi = {10.1007/978-3-658-02810-7_36}, pages = {429 -- 440}, year = {2013}, abstract = {Seismic excited liquid filled tanks are subjected to extreme loading due to hydrodynamic pressures, which can lead to nonlinear stability failure of the thinwalled cylindrical tanks, as it is known from past earthquakes. A significant reduction of the seismically induced loads can be obtained by the application of base isolation systems, which have to be designed carefully with respect to the modified hydrodynamic behaviour of the tank in interaction with the liquid. For this reason a highly sophisticated fluid-structure interaction model has to be applied for a realistic simulation of the overall dynamic system. In the following, such a model is presented and compared with the results of simplified mathematical models for rigidly supported tanks. Finally, it is examined to what extent a simple mechanical model can represent the behaviour of a base isolated tank in case of seismic excitation}, language = {en} } @inproceedings{RosinHenneboehlButenweg2014, author = {Rosin, Julia and Henneb{\"o}hl, Benedickt and Butenweg, Christoph}, title = {Global buckling analysis of cylindrical liquid storage tanks under earthquake loading}, series = {2nd European Conference on Earthquake Engineering and Seismology 2014 (2nd ECEES) : joint event of the 15th European Conference on Earthquake Engineering and the 34th General Assembly of the European Seismological Commission : Istanbul, Turkey, 25-29 August 2014 / European Association for Earthquake Engineering (EAEE) ; Vol. 6}, booktitle = {2nd European Conference on Earthquake Engineering and Seismology 2014 (2nd ECEES) : joint event of the 15th European Conference on Earthquake Engineering and the 34th General Assembly of the European Seismological Commission : Istanbul, Turkey, 25-29 August 2014 / European Association for Earthquake Engineering (EAEE) ; Vol. 6}, publisher = {Curran Associates, Inc.}, address = {Red Hook, NY}, organization = {European Conference on Earthquake Engineering and Seismology <2, 2014, Istanbul>}, isbn = {978-1-5108-1021-1}, pages = {5270 -- 5281}, year = {2014}, language = {en} } @article{RosinButenwegCacciatoreetal.2018, author = {Rosin, Julia and Butenweg, Christoph and Cacciatore, Pamela and Boesen, Niklas}, title = {Investigation of the seismic performance of modern masonry buildings during the Emilia Romagna earthquake series}, series = {Mauerwerk}, volume = {22}, journal = {Mauerwerk}, number = {4}, publisher = {Ernst \& Sohn}, address = {Berlin}, issn = {1437-1022}, doi = {10.1002/dama.201800013}, pages = {238 -- 250}, year = {2018}, abstract = {The article presents the investigation of the seismic behaviour of a modern URM building located in the municipality of Finale Emilia in province of Modena, Northern Italy. The building is situated in the centre of the series of the 2012 Northern Italy earthquakes and has not suffered any damage during the earthquake series in 2012. The observed earthquake resistance of the building is compared with predicted resistances based on linear and nonlinear design approaches according to Eurocode. Furthermore, probabilistic analyses based on nonlinear calculation models taking into account scattering of the most relevant input parameters are carried out to identify their influence to the results and to derive fragility curves.}, language = {en} } @inproceedings{RosinButenwegBoesenetal.2018, author = {Rosin, Julia and Butenweg, Christoph and Boesen, Niklas and Gellert, Christoph}, title = {Evaluation of the Seismic Behavior of a Modern URM Building During the 2012 Northern Italy Earthquakes}, series = {16th European Conference on Earthquake Engineering, Thessaloniki, 18-21 June, 2018}, booktitle = {16th European Conference on Earthquake Engineering, Thessaloniki, 18-21 June, 2018}, pages = {1 -- 12}, year = {2018}, language = {en} } @inproceedings{RosinButenweg2014, author = {Rosin, Julia and Butenweg, Christoph}, title = {Seismic isolation of cylindrical liquid storage tanks}, series = {Proceedings of the 9th European Conference on Structural Dynamics, EURODYN 2014 Porto, Portugal, 30 June - 2 July 2014 / A. Cunha, E. Caetano, .... (eds.)}, booktitle = {Proceedings of the 9th European Conference on Structural Dynamics, EURODYN 2014 Porto, Portugal, 30 June - 2 July 2014 / A. Cunha, E. Caetano, .... (eds.)}, address = {Porto}, organization = {European Conference on Structural Dynamics, EURODYN <9, 2014, Porto>}, isbn = {978-972-752-165-4}, pages = {3145 -- 3152}, year = {2014}, language = {en} } @inproceedings{RosinMykoniouButenweg2017, author = {Rosin, J. and Mykoniou, K. and Butenweg, Christoph}, title = {Analysis Of Base Isolated Liquid Storage Tanks With 3D Fsi-Analysis As Well As Simplified Approaches}, series = {16th World Conference on Earthquake Engineering, 16WCEE 2017 Santiago Chile, January 9th to 13th 2017}, booktitle = {16th World Conference on Earthquake Engineering, 16WCEE 2017 Santiago Chile, January 9th to 13th 2017}, publisher = {Chilean Association on Seismology and Earthquake Engineering (ACHISINA)}, pages = {1 -- 14}, year = {2017}, abstract = {Tanks are preferably designed, for cost-saving reasons, as circular, cylindrical, thin-walled shells. In case of seismic excitation, these constructions are highly vulnerable to stability failures. An earthquake-resistant design of rigidly supported tanks for high seismic loading demands, however, uneconomic wall thicknesses. A cost-effective alternative can be provided by base isolation systems. In this paper, a simplified seismic design procedure for base isolated tanks is introduced, by appropriately modifying the standard mechanical model for flexible, rigidly supported tanks. The non-linear behavior of conventional base isolation systems becomes an integral part of a proposed simplified process, which enables the assessment of the reduced hydrodynamic forces acting on the tank walls and the corresponding stress distribution. The impulsive and convective actions of the liquid are taken into account. The validity of this approach is evaluated by employing a non-linear fluid-structure interaction algorithm of finite element method. Special focus is placed on the boundary conditions imposed from the base isolation and the resulting hydrodynamic pressures. Both horizontal and vertical component of ground motion are considered in order to study the principal effects of the base isolation on the pressure distribution of the tank walls. The induced rocking effects associated with elastomeric bearings are discussed. The results manifest that base isolated tanks can be designed for seismic loads by means of the proposed procedure with sufficient accuracy, allowing to dispense with numerically expensive techniques.}, language = {en} } @article{RosenauerOberstLitvinovetal.2000, author = {Rosenauer, A. and Oberst, W. and Litvinov, D. and Gerthsen, D. and F{\"o}rster, Arnold and Schmidt, R.}, title = {Structural and Chemical Investigation of In-0.6Ga0.4As Stranski-Krastanow Layers Burried in GaAs by Transmission Electron Microscopy}, series = {Physical Review B. 61 (2000), H. 12}, journal = {Physical Review B. 61 (2000), H. 12}, isbn = {1095-3795}, pages = {8276 -- 8288}, year = {2000}, language = {en} } @inproceedings{RosemannEggertVoigtetal.2012, author = {Rosemann, Michael and Eggert, Mathias and Voigt, Matthias and Beverungen, Daniel}, title = {Leveraging Social Network Data for Analytical CRM Strategies - The Introduction of Social BI.}, series = {ECIS 2012 Proceedings}, booktitle = {ECIS 2012 Proceedings}, pages = {12 S.}, year = {2012}, language = {en} } @inproceedings{RoosenFeyerl2015, author = {Roosen, Petra and Feyerl, G{\"u}nter}, title = {Gender-specific perception and utilization of personal use vehicles}, series = {FISITA World Automotive Congress 2014 : Maastricht, The Netherlands, 2 - 6 June / [organised by the International Federation of Automotive Engineering Societies (FISITA) ...]. Bd. 1}, booktitle = {FISITA World Automotive Congress 2014 : Maastricht, The Netherlands, 2 - 6 June / [organised by the International Federation of Automotive Engineering Societies (FISITA) ...]. Bd. 1}, publisher = {Curran}, address = {Red Hook, NY}, isbn = {978-1-5108-0209-4}, pages = {418 -- 425}, year = {2015}, language = {en} } @article{RolkaPoghossianSchoening2004, author = {Rolka, David and Poghossian, Arshak and Sch{\"o}ning, Michael Josef}, title = {Integration of a capacitive EIS sensor into a FIA system for pH and penicillin determination}, series = {Sensors. 4 (2004)}, journal = {Sensors. 4 (2004)}, isbn = {1424-8220}, pages = {84 -- 94}, year = {2004}, language = {en} } @inproceedings{RokitanskyEhammerGraeupletal.2007, author = {Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana and Rihacek, Christoph and Sajatovic, Miodrag}, title = {B-AMC a system for future broadband aeronautical multi-carrier communications in the L-BAND}, series = {IEEE/AIAA 26th Digital Avionics Systems Conference ; DASC '07 ; 21 - 25 Oct. 2007, Dallas, Texas}, booktitle = {IEEE/AIAA 26th Digital Avionics Systems Conference ; DASC '07 ; 21 - 25 Oct. 2007, Dallas, Texas}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4244-1108-5}, pages = {4D2-1 -- 4D2-13}, year = {2007}, language = {en} } @inproceedings{RokitanskyEhammerGraeupletal.2007, author = {Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana and Rihacek, Christoph and Sajatovic, Miodrag}, title = {B-AMC - Aeronautical Broadband Communication in the L-Band}, series = {First CEAS European Air and Space Conference : Motto: century perspectives : Deutscher Luft-und Raumfahrtkongress 2007 : 10-13 September 2007 in Berlin, Germany. (Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2007 ; Bd. 1-5. - Enth.: Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2006 ; Bd. 3)}, booktitle = {First CEAS European Air and Space Conference : Motto: century perspectives : Deutscher Luft-und Raumfahrtkongress 2007 : 10-13 September 2007 in Berlin, Germany. (Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2007 ; Bd. 1-5. - Enth.: Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2006 ; Bd. 3)}, publisher = {Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt}, address = {Bonn}, organization = {European Air and Space Conference <1, 2007, Berlin>}, issn = {0070-4083}, pages = {487 -- 496}, year = {2007}, language = {en} } @article{RoethSlabuKessleretal.2019, author = {Roeth, A.A. and Slabu, I. and Kessler, A. and Engelmann, Ulrich M.}, title = {Local treatment of pancreatic cancer with magnetic nanoparticles}, series = {HPB}, volume = {21}, journal = {HPB}, number = {Supplement 3}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1365-182X}, doi = {10.1016/j.hpb.2019.10.959}, pages = {S868 -- S869}, year = {2019}, language = {en} } @article{RoesnerScheikOlowinskyetal.2011, author = {Roesner, Andreas and Scheik, Sven and Olowinsky, Alexander and Gillner, Arnold and Reisgen, Uwe and Schleser, Markus}, title = {Laser assisted joining of plastic metal hybrids}, series = {Lasers in manufacturing 2011 : proceedings of the sixth International WLT Conference on Lasers in Manufacturing, Munich, May 23 - 26 2011. (Physics procedia ; Vol. 12 (2011), Part B)}, journal = {Lasers in manufacturing 2011 : proceedings of the sixth International WLT Conference on Lasers in Manufacturing, Munich, May 23 - 26 2011. (Physics procedia ; Vol. 12 (2011), Part B)}, publisher = {Elsevier}, address = {Amsterdam}, organization = {International WLT Conference on Lasers in Manufacturing <6, M{\"u}nchen, 2011>}, issn = {1875-3892 (E-Journal); 1875-3884 (Print)}, pages = {370 -- 377}, year = {2011}, language = {en} } @article{RoesnerScheikOlowinskyetal.2011, author = {Roesner, Andreas and Scheik, Sven and Olowinsky, Alexander and Gillner, Arnold and Propawe, Reinhart and Schleser, Markus and Reisgen, Uwe}, title = {Innovative approach of joining hybrid components}, series = {Journal of laser applications}, volume = {Vol. 23}, journal = {Journal of laser applications}, number = {Iss. 3}, publisher = {Laser Institute of America}, address = {Orlando, Fla.}, issn = {1042-346X}, pages = {32007}, year = {2011}, language = {en} } @article{RoepkeKoehlerDruryetal.2020, author = {Roepke, Rene and K{\"o}hler, Klemens and Drury, Vincent and Schroeder, Ulrik and Wolf, Martin R. and Meyer, Ulrike}, title = {A pond full of phishing games - analysis of learning games for anti-phishing education}, series = {Model-driven Simulation and Training Environments for Cybersecurity. MSTEC 2020}, journal = {Model-driven Simulation and Training Environments for Cybersecurity. MSTEC 2020}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-62433-0}, doi = {10.1007/978-3-030-62433-0_32020}, pages = {41 -- 60}, year = {2020}, abstract = {Game-based learning is a promising approach to anti-phishing education, as it fosters motivation and can help reduce the perceived difficulty of the educational material. Over the years, several prototypes for game-based applications have been proposed, that follow different approaches in content selection, presentation, and game mechanics. In this paper, a literature and product review of existing learning games is presented. Based on research papers and accessible applications, an in-depth analysis was conducted, encompassing target groups, educational contexts, learning goals based on Bloom's Revised Taxonomy, and learning content. As a result of this review, we created the publications on games (POG) data set for the domain of anti-phishing education. While there are games that can convey factual and conceptual knowledge, we find that most games are either unavailable, fail to convey procedural knowledge or lack technical depth. Thus, we identify potential areas of improvement for games suitable for end-users in informal learning contexts.}, language = {en} } @article{RodriguesMoraisNordietal.2018, author = {Rodrigues, Raul T. and Morais, Paulo V. and Nordi, Cristina S. F. and Sch{\"o}ning, Michael Josef and Siqueira Jr., Jos{\´e} R. and Caseli, Luciano}, title = {Carbon Nanotubes and Algal Polysaccharides To Enhance the Enzymatic Properties of Urease in Lipid Langmuir-Blodgett Films}, series = {Langmuir}, volume = {34}, journal = {Langmuir}, number = {9}, publisher = {ACS Publications}, address = {Washington, DC}, issn = {1520-5827}, doi = {10.1021/acs.langmuir.7b04317}, pages = {3082 -- 3093}, year = {2018}, abstract = {Algal polysaccharides (extracellular polysaccharides) and carbon nanotubes (CNTs) were adsorbed on dioctadecyldimethylammonium bromide Langmuir monolayers to serve as a matrix for the incorporation of urease. The physicochemical properties of the supramolecular system as a monolayer at the air-water interface were investigated by surface pressure-area isotherms, surface potential-area isotherms, interfacial shear rheology, vibrational spectroscopy, and Brewster angle microscopy. The floating monolayers were transferred to hydrophilic solid supports, quartz, mica, or capacitive electrolyte-insulator-semiconductor (EIS) devices, through the Langmuir-Blodgett (LB) technique, forming mixed films, which were investigated by quartz crystal microbalance, fluorescence spectroscopy, and field emission gun scanning electron microscopy. The enzyme activity was studied with UV-vis spectroscopy, and the feasibility of the thin film as a urea sensor was essayed in an EIS sensor device. The presence of CNT in the enzyme-lipid LB film not only tuned the catalytic activity of urease but also helped to conserve its enzyme activity. Viability as a urease sensor was demonstrated with capacitance-voltage and constant capacitance measurements, exhibiting regular and distinctive output signals over all concentrations used in this work. These results are related to the synergism between the compounds on the active layer, leading to a surface morphology that allowed fast analyte diffusion owing to an adequate molecular accommodation, which also preserved the urease activity. This work demonstrates the feasibility of employing LB films composed of lipids, CNT, algal polysaccharides, and enzymes as EIS devices for biosensing applications.}, language = {en} } @inproceedings{RochefortVerverGrunendahletal.2005, author = {Rochefort, E. de and Verver, M. and Grunendahl, A. and Mooi, H. and Butenweg, Christoph}, title = {Detailed modelling of the lumbar spine for investigation of low back pain}, series = {Digital Human Modeling for Design and Engineering Symposium : Iowa City, Iowa June 14-16, 2005. (SAE technical papers series ; 2005-1-2716)}, booktitle = {Digital Human Modeling for Design and Engineering Symposium : Iowa City, Iowa June 14-16, 2005. (SAE technical papers series ; 2005-1-2716)}, publisher = {SAE International}, address = {Warrendale, Pa.}, organization = {Society of Automotive Engineers}, issn = {0096-736X}, doi = {10.4271/2005-01-2716}, pages = {1 -- 11}, year = {2005}, language = {en} } @article{RochefortVerverGrunendahletal.2005, author = {Rochefort, E. de and Verver, M. and Grunendahl, A. and Mooi, H. and Butenweg, Christoph}, title = {Detailed modelling of the lumbar spine for investigations of low back pain}, series = {SAE transactions : papers presented at Society and Section meetings / Society of Automotive Engineers}, volume = {Volume 114}, journal = {SAE transactions : papers presented at Society and Section meetings / Society of Automotive Engineers}, number = {Part 7}, organization = {Society of Automotive Engineers}, issn = {0096-736X}, pages = {788 -- 796}, year = {2005}, language = {en} } @article{RobinsonRoennaFunke2007, author = {Robinson, A. E. and R{\"o}nna, Uwe and Funke, Harald}, title = {Testing of a 10 kW diffusive micro-mix combustor for hydrogen-fuelled micro-scale gas turbines}, series = {International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications <7, 2007, Freiburg, Breisgau> ; PowerMEMS ; 7}, journal = {International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications <7, 2007, Freiburg, Breisgau> ; PowerMEMS ; 7}, pages = {225 -- 228}, year = {2007}, language = {en} } @article{RobinsonFunkeWagemakersetal.2009, author = {Robinson, A. E. and Funke, Harald and Wagemakers, R. and Grossen, J. and Bosschaerts, W. and Hendrick, P.}, title = {Numerical and Experimental Investigation of a Micromix Combustor for a Hydrogen Fuelled μ-Scale Gas Turbine}, series = {Proceedings of the ASME Turbo Expo 2009 : : presented at the 2009 ASME Turbo Expo, June 8 - 12, 2009, Orlando, Florida, USA / sponsored by the International Gas Turbine Institute}, journal = {Proceedings of the ASME Turbo Expo 2009 : : presented at the 2009 ASME Turbo Expo, June 8 - 12, 2009, Orlando, Florida, USA / sponsored by the International Gas Turbine Institute}, publisher = {ASME}, address = {New York, NY}, isbn = {9780791848869}, pages = {253 -- 262}, year = {2009}, language = {en} } @article{RobinsonFunkeHendricketal.2008, author = {Robinson, A. E. and Funke, Harald and Hendrick, P. and Recker, E. and Peirs, J.}, title = {Development of a hydrogen fuelled 1 kW ultra micro gas turbine with special respect to designing, testing and mapping of the µ-scale combustor}, series = {IEEE International Conference on Sustainable Energy Technologies, 2008 : ICSET 2008 ; Singapore, 24 - 27 Nov. 2008.}, journal = {IEEE International Conference on Sustainable Energy Technologies, 2008 : ICSET 2008 ; Singapore, 24 - 27 Nov. 2008.}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4244-1887-9}, pages = {656 -- 660}, year = {2008}, language = {en} } @article{RobinsonFunkeHendrick2011, author = {Robinson, A. E. and Funke, Harald and Hendrick, P.}, title = {Design and Testing of a Micromix Combustor With Recuperative Wall Cooling for a Hydrogen Fueled µ-Scale Gas Turbine}, series = {Journal of engineering for gas turbines and power}, volume = {133}, journal = {Journal of engineering for gas turbines and power}, number = {8}, publisher = {ASME}, address = {New York}, isbn = {1528-8919}, pages = {Art. Nr. 082301 , 8 Seiten}, year = {2011}, language = {en} } @article{RitzStender2006, author = {Ritz, Thomas and Stender, Michael}, title = {Modeling of B2B mobile commerce processes}, series = {International Journal of Production Economics}, volume = {101}, journal = {International Journal of Production Economics}, number = {1}, issn = {0925-5273}, doi = {10.1016/j.ijpe.2005.05.017}, pages = {128 -- 139}, year = {2006}, language = {en} } @inproceedings{RitzIzquierdoTelloDamm2014, author = {Ritz, Thomas and Izquierdo Tello, C{\´e}sar and Damm, Sebastian}, title = {Connecting a pedelec to the cloud as basis for gamification in multi modal mobility planning}, series = {MobileCloud 2014 : 2nd IEEE International Conference on Mobile Cloud Computing, Services, and Engineering Oxford, United Kingdom 7-10 April 2014}, booktitle = {MobileCloud 2014 : 2nd IEEE International Conference on Mobile Cloud Computing, Services, and Engineering Oxford, United Kingdom 7-10 April 2014}, publisher = {IEEE Service Center}, address = {Piscataway, NJ}, isbn = {978-1-4799-2504-9}, doi = {10.1109/MobileCloud.2014.25}, pages = {101 -- 108}, year = {2014}, language = {en} } @book{RitzBenzStender2003, author = {Ritz, Thomas and Benz, Axel and Stender, Michael}, title = {Marktstudie mobile CRM-Systeme}, publisher = {Fraunhofer-IRB-Verl.}, address = {Stuttgart}, isbn = {3-8167-6361-8}, pages = {244 S. : Ill., graph. Darst.}, year = {2003}, language = {en} } @article{Ritz2000, author = {Ritz, Thomas}, title = {Information Channels}, series = {Information Technology. Nr. 52 (2000), H. 08. Mai 2000}, journal = {Information Technology. Nr. 52 (2000), H. 08. Mai 2000}, pages = {15 -- 15}, year = {2000}, language = {en} } @article{Ritz2002, author = {Ritz, Thomas}, title = {Modelling Production of personalized information services and their delivery on multiple distribution channels}, series = {Personalization Techniques in Electronic Publishing on the Web. Workshop in the Framework of the 2nd international conference on Adaptive Hypermedia and adaptive web based systems (AH2002) in Malaga (ES)}, journal = {Personalization Techniques in Electronic Publishing on the Web. Workshop in the Framework of the 2nd international conference on Adaptive Hypermedia and adaptive web based systems (AH2002) in Malaga (ES)}, pages = {19 -- 30}, year = {2002}, language = {en} } @inproceedings{Ritz2003, author = {Ritz, Thomas}, title = {Production and distribution of personalized information services employing mass customization}, series = {2nd Interdisciplinary World Congress on Mass Customization and Personalization : MCPC'03, October 6 - 8, 2003, Technische Universit{\"a}t M{\"u}nchen, Munic, Germany}, booktitle = {2nd Interdisciplinary World Congress on Mass Customization and Personalization : MCPC'03, October 6 - 8, 2003, Technische Universit{\"a}t M{\"u}nchen, Munic, Germany}, edition = {CD-Ausg.}, publisher = {Techn. Univ. (TUM)}, address = {M{\"u}nchen}, pages = {Part IV}, year = {2003}, language = {en} } @article{Ritz2002, author = {Ritz, Thomas}, title = {Modelling mass customization of digital news services}, series = {International journal of e-business strategy management}, volume = {3}, journal = {International journal of e-business strategy management}, number = {3}, year = {2002}, language = {en} } @article{Ritz2000, author = {Ritz, Thomas}, title = {Personalized information services : an electronic information commodity and its production}, series = {International Journal of E-Business Strategy Management}, volume = {2}, journal = {International Journal of E-Business Strategy Management}, number = {2}, issn = {1467-0305}, year = {2000}, language = {en} } @inproceedings{Ritz2001, author = {Ritz, Thomas}, title = {Personalized information services : an electronic information commodity and its production}, series = {Electronic publishing '01 : 2001 in the digital publishing odyssey ; proceedings of an ICCC/IFIP conference held at the University of Kent at Canterbury, Kent, United Kingdom, 5 - 7 July, 2001 ; [proceedings of the Fifth Conference on Electronic Publishing]}, booktitle = {Electronic publishing '01 : 2001 in the digital publishing odyssey ; proceedings of an ICCC/IFIP conference held at the University of Kent at Canterbury, Kent, United Kingdom, 5 - 7 July, 2001 ; [proceedings of the Fifth Conference on Electronic Publishing]}, publisher = {IOS Press [u.a.]}, address = {Amsterdam}, isbn = {1-58603-191-0}, pages = {48 -- 58}, year = {2001}, language = {en} } @article{Ritz2002, author = {Ritz, Thomas}, title = {Mass Customized Production of Information Services - The combination of economies-of-scale with economies-of-scope}, series = {Media firms : structures, operations, and performance ; [World Media Economics Conference, 5th : 2002 : Turku, Finland] / ed. by Robert G. Picard}, journal = {Media firms : structures, operations, and performance ; [World Media Economics Conference, 5th : 2002 : Turku, Finland] / ed. by Robert G. Picard}, publisher = {Erlbaum}, address = {Mahwah, NJ [u.a.]}, isbn = {0-8058-4165-2}, pages = {267 S. : graph. Darst.}, year = {2002}, language = {en} } @inproceedings{Ritz2001, author = {Ritz, Thomas}, title = {DISMED - an innovation portal for printing and media industry}, series = {CRIS 2000 : the fifth conference on Current Research Information Systems in Europe, in Helsinki (Finland), 25-27 May 2000}, booktitle = {CRIS 2000 : the fifth conference on Current Research Information Systems in Europe, in Helsinki (Finland), 25-27 May 2000}, publisher = {CORDIS Archive}, address = {[s.l.]}, pages = {9 S. : graph. Darst.}, year = {2001}, language = {en} } @article{Ritz2002, author = {Ritz, Thomas}, title = {Personalized Information Services: Production and Distribution of these Services employing Mass-Customization}, year = {2002}, language = {en} } @article{RittwegerAlbrachtFluecketal.2018, author = {Rittweger, J{\"o}rn and Albracht, Kirsten and Fl{\"u}ck, Martin and Ruoss, Severin and Brocca, Lorenza and Longa, Emanuela and Moriggi, Manuela and Seynnes, Olivier and Di Giulio, Irene and Tenori, Leonardo and Vignoli, Alessia and Capri, Miriam and Gelfi, Cecilia and Luchinat, Claudio and Franceschi, Claudio and Bottinelli, Roberto and Cerretelli, Paolo and Narici, Marco}, title = {Sarcolab pilot study into skeletal muscle's adaptation to longterm spaceflight}, series = {npj Microgravity}, volume = {4}, journal = {npj Microgravity}, number = {1}, publisher = {Nature Portfolio}, issn = {2373-8065}, doi = {10.1038/s41526-018-0052-1}, pages = {1 -- 9}, year = {2018}, language = {en} } @inproceedings{RitschelStenzelCzarneckietal.2021, author = {Ritschel, Konstantin and Stenzel, Adina and Czarnecki, Christian and Hong, Chin-Gi}, title = {Realizing robotic process automation potentials: an architectural perspective on a real-life implementation case}, series = {GI Edition Proceedings Band 314 "INFORMATIK 2021" Computer Science \& Sustainability}, booktitle = {GI Edition Proceedings Band 314 "INFORMATIK 2021" Computer Science \& Sustainability}, editor = {Gesellschaft f{\"u}r Informatik e.V. (GI),}, publisher = {K{\"o}llen}, address = {Bonn}, isbn = {9783885797081}, issn = {1617-5468}, doi = {10.18420/informatik2021-108}, pages = {1303 -- 1311}, year = {2021}, abstract = {The initial idea of Robotic Process Automation (RPA) is the automation of business processes through a simple emulation of user input and output by software robots. Hence, it can be assumed that no changes of the used software systems and existing Enterprise Architecture (EA) is required. In this short, practical paper we discuss this assumption based on a real-life implementation project. We show that a successful RPA implementation might require architectural work during analysis, implementation, and migration. As practical paper we focus on exemplary lessons-learned and new questions related to RPA and EA.}, language = {en} } @inproceedings{RingsLudowicyFingeretal.2019, author = {Rings, Ren{\´e} and Ludowicy, Jonas and Finger, Felix and Braun, Carsten and Bil, Cees}, title = {Sensitivity Analysis of General Aviation Aircraft with Parallel Hybrid-Electric Propulsion Systems}, series = {Asia Pacific International Symposium on Aerospace Technology. APISAT 2019}, booktitle = {Asia Pacific International Symposium on Aerospace Technology. APISAT 2019}, pages = {14 Seiten}, year = {2019}, language = {en} } @unpublished{RingersBialonskiSolovevetal.2021, author = {Ringers, Christa and Bialonski, Stephan and Solovev, Anton and Hansen, Jan N. and Ege, Mert and Friedrich, Benjamin M. and Jurisch-Yaksi, Nathalie}, title = {Preprint: Local synchronization of cilia and tissue-scale cilia alignment are sufficient for global metachronal waves}, series = {bioRxiv}, journal = {bioRxiv}, doi = {10.1101/2021.11.23.469646}, pages = {19 Seiten}, year = {2021}, abstract = {Motile cilia are hair-like cell extensions present in multiple organs of the body. How cilia coordinate their regular beat in multiciliated epithelia to move fluids remains insufficiently understood, particularly due to lack of rigorous quantification. We combine here experiments, novel analysis tools, and theory to address this knowledge gap. We investigate collective dynamics of cilia in the zebrafish nose, due to its conserved properties with other ciliated tissues and its superior accessibility for non-invasive imaging. We revealed that cilia are synchronized only locally and that the size of local synchronization domains increases with the viscosity of the surrounding medium. Despite the fact that synchronization is local only, we observed global patterns of traveling metachronal waves across the multiciliated epithelium. Intriguingly, these global wave direction patterns are conserved across individual fish, but different for left and right nose, unveiling a chiral asymmetry of metachronal coordination. To understand the implications of synchronization for fluid pumping, we used a computational model of a regular array of cilia. We found that local metachronal synchronization prevents steric collisions and improves fluid pumping in dense cilia carpets, but hardly affects the direction of fluid flow. In conclusion, we show that local synchronization together with tissue-scale cilia alignment are sufficient to generate metachronal wave patterns in multiciliated epithelia, which enhance their physiological function of fluid pumping.}, language = {en} }