@article{PfeiffelmannBenim2018, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal}, title = {Numerical study of the quenching of a laminar premixed hydrogen flame}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001031}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27976}, year = {2018}, language = {en} } @article{IqbalPfeiffelmannBenimetal.2018, author = {Iqbal, Sohail and Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Numerical analysis of lifted hydrogen flame}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001014}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27950}, year = {2018}, language = {en} } @article{SaeedrashedBenim2018, author = {Saeedrashed, Younis Saida and Benim, Ali Cemal}, title = {A computational investigation of the hydrodynamics of the Badush dam in northern Iraq}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824004009}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27997}, year = {2018}, language = {en} } @article{PfeiffelmannBenimJoos2018, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Numerical analysis of liquid jet impingement cooling of a thermoelectric generator}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001032}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27988}, year = {2018}, language = {en} } @article{NiemannPisla2018, author = {Niemann, J{\"o}rg and Pisla, Adrian}, title = {Sustainable Potentials and Risks Assess in Automation and Robotization Using the Life Cycle Management Index Tool—LY-MIT}, series = {Sustainability}, volume = {10}, journal = {Sustainability}, number = {12}, publisher = {MDPI}, issn = {2071-1050}, doi = {10.3390/su10124638}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27966}, year = {2018}, language = {en} } @article{BhattacharyyaChattopadhyayBanerjeeetal.2018, author = {Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Banerjee, Arnab and Benim, Ali Cemal}, title = {Heat transfer and flow field in a circular twisted channel}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, doi = {10.1051/matecconf/201824001005}, year = {2018}, language = {en} } @article{GuoDoRuess2019, author = {Guo, Y. and Do, H. and Ruess, Martin}, title = {Isogeometric stability analysis of thin shells: From simple geometries to engineering models}, series = {International Journal for Numerical Methods in Engineering}, volume = {118}, journal = {International Journal for Numerical Methods in Engineering}, number = {8}, publisher = {Wiley}, issn = {1097-0207}, doi = {10.1002/nme.6020}, pages = {433 -- 458}, year = {2019}, language = {en} } @article{BenimCicekEker2018, author = {Benim, Ali Cemal and {\c{C}}i{\c{c}}ek, Ayd{\i}n and Eker, Arif Mert}, title = {A numerical analysis of the thermohydraulics of an EGS project in Turkey}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824005001}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27910}, year = {2018}, language = {en} } @article{BenimDiederichGuel2018, author = {Benim, Ali Cemal and Diederich, Michael and G{\"u}l, Fethi}, title = {Prediction and measurement of the aerodynamic performance of a wind turbine}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824004001}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27925}, year = {2018}, language = {en} } @article{PfeiffelmannOezmanBenimetal.2019, author = {Pfeiffelmann, Bj{\"o}rn and {\"O}zman, Cansu and Benim, Ali Cemal and Joos, Franz}, title = {Variable temperature effects on TEG performance}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912807004}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27893}, year = {2019}, language = {en} } @article{SaeedrashedBenim2019, author = {Saeedrashed, Younis Saida and Benim, Ali Cemal}, title = {Validation Methods of Geometric 3D-CityGML Data for Urban Wind Simulations}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912810006}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27906}, year = {2019}, language = {en} } @article{PfeiffelmannDiederichGueletal.2019, author = {Pfeiffelmann, Bj{\"o}rn and Diederich, Michael and G{\"u}l, Fethi and Benim, Ali Cemal and Hamberger, Andreas and Heese, Markus}, title = {Analysis of combustion, heat and fluid flow in a biomass furnace}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912803003}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27880}, year = {2019}, language = {en} } @article{BenimDiederichGueletal.2018, author = {Benim, Ali Cemal and Diederich, Michael and G{\"u}l, Fethi and Oclon, Pawel and Taler, Jan}, title = {Computational and experimental investigation of the aerodynamics and aeroacoustics of a small wind turbine with quasi-3D optimization}, series = {Energy Conversion and Management}, volume = {177}, journal = {Energy Conversion and Management}, publisher = {Elsevier}, doi = {10.1016/j.enconman.2018.09.042}, pages = {143 -- 149}, year = {2018}, language = {en} } @article{BenimPfeiffelmann2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Validation of Combustion Models for Lifted Hydrogen Flame}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801014}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27815}, year = {2019}, language = {en} } @article{BenimPfeiffelmann2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Prediction of burning velocity and quenching distance of hydrogen flames}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801012}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27790}, year = {2019}, language = {en} } @article{BenimPfeiffelmannOcłońetal.2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn and Ocłoń, Paweł and Taler, Jan}, title = {Computational investigation of a lifted hydrogen flame with LES and FGM}, series = {Energy}, volume = {173}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2019.02.133}, pages = {1172 -- 1181}, year = {2019}, language = {en} } @article{BenimPfeiffelmann2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Prediction of hydrogen flame propagation in a channel with exit contraction}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, number = {01013}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801013}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27806}, year = {2019}, language = {en} } @article{BiedermannCzeckayGeyeretal.2019, author = {Biedermann, Till M. and Czeckay, Pasquale and Geyer, Thomas F. and Kameier, Frank and Paschereit, Christian O.}, title = {Effect of Inflow Conditions on the Noise Reduction Through Leading Edge Serrations}, series = {AIAA Journal}, volume = {57}, journal = {AIAA Journal}, number = {9}, publisher = {ARC}, issn = {1533-385X}, doi = {10.2514/1.j057831}, pages = {4104 -- 4109}, year = {2019}, language = {en} } @article{BenimDiederichNahavandi2019, author = {Benim, Ali Cemal and Diederich, Michael and Nahavandi, Ali}, title = {Prediction of flow and dispersion in cross-ventilated buildings}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, organization = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912805002}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27785}, year = {2019}, language = {en} } @article{BhattacharyyaGobindaDasChattopadhyayetal.2019, author = {Bhattacharyya, Suvanjan and Gobinda Das, Sampad and Chattopadhyay, Himadri and Benim, Ali Cemal and Moghimi, M. A.}, title = {Transport Phenomenon of Simultaneously Developing Flow and Heat Transfer in Twisted Sinusoidal Wavy Microchannel under Pulsating Inlet Flow Condition}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, doi = {10.1051/e3sconf/201912801011}, year = {2019}, language = {en} } @article{BenimPfeiffelmann2020, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework}, series = {Energies}, volume = {13}, journal = {Energies}, number = {1}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en13010152}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27727}, pages = {152}, year = {2020}, language = {en} } @article{BenimDiederich2019, author = {Benim, Ali Cemal and Diederich, Michael}, title = {Prediction of Roughness Effects on Wind Turbine Aerodynamics}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912809004}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27775}, year = {2019}, language = {en} } @article{PfeiffelmannBenimJoos2021, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Computational Investigation of Impingement Cooling of Thermoelectric Generators}, series = {Heat Transfer Engineering}, volume = {42}, journal = {Heat Transfer Engineering}, number = {3-4}, publisher = {Taylor \& Francis}, issn = {0145-7632}, doi = {10.1080/01457632.2019.1699296}, pages = {282 -- 295}, year = {2021}, language = {en} } @article{BaşaranBenimYurddas2019, author = {Ba{\c{s}}aran, An{\i}l and Benim, Ali Cemal and Yurddas, Ali}, title = {Prediction of heat and fluid flow in microchannel condensation}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801015}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27768}, year = {2019}, language = {en} } @article{FominPetelinJahr2020, author = {Fomin, Alexey and Petelin, Daniil and Jahr, Andreas}, title = {Synthesis and Analysis of a Novel Linkage Mechanism with the Helical Motion of the End-Effector}, series = {Robotics}, volume = {9}, journal = {Robotics}, number = {3}, publisher = {MDPI}, issn = {2218-6581}, doi = {10.3390/robotics9030053}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27736}, pages = {1 -- 15}, year = {2020}, language = {en} } @article{PfeiffelmannDiederichGueletal.2020, author = {Pfeiffelmann, Bj{\"o}rn and Diederich, Michael and G{\"u}l, Fethi and Benim, Ali Cemal and Heese, Markus and Hamberger, Andreas}, title = {Computational and Experimental Investigation of an Industrial Biomass Furnace}, series = {Chemical Engineering \& Technology}, volume = {43}, journal = {Chemical Engineering \& Technology}, number = {8}, publisher = {Wiley}, issn = {1521-4125}, doi = {10.1002/ceat.201900637}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27747}, pages = {1538 -- 1546}, year = {2020}, language = {en} } @article{ShahzadGulistanAlietal.2020, author = {Shahzad, Azeem and Gulistan, Uzma and Ali, Ramzan and Iqbal, Azhar and Benim, Ali Cemal and Kamran, Muhammad and Khan, Salah Ud-Din and Khan, Shahab Ud-Din and Farooq, Aamir}, title = {Numerical Study of Axisymmetric Flow and Heat Transfer in a Liquid Film over an Unsteady Radially Stretching Surface}, series = {Mathematical Problems in Engineering}, volume = {2020}, journal = {Mathematical Problems in Engineering}, publisher = {Hindawi}, doi = {10.1155/2020/6737243}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27755}, pages = {1 -- 9}, year = {2020}, language = {en} } @article{DasBhattacharyyaChattopadhyayetal.2021, author = {Das, Sampad Gobinda and Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Benim, Ali Cemal}, title = {Transport Phenomenon of Simultaneously Developing Flow and Heat Transfer in Twisted Sinusoidal Wavy Microchannel under Pulsating Inlet Flow Condition}, series = {Heat Transfer Engineering}, journal = {Heat Transfer Engineering}, publisher = {Taylor \& Francis}, doi = {10.1080/01457632.2021.1875166}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27697}, pages = {1 -- 14}, year = {2021}, language = {en} } @article{BenimSyedKhawarJ1998, author = {Benim, Ali Cemal and Syed, Khawar, J.,}, title = {Laminar flamelet modelling of turbulent premixed combustion}, series = {Applied Mathematical Modelling}, volume = {22}, journal = {Applied Mathematical Modelling}, number = {1-2}, publisher = {Elsevier}, doi = {10.1016/s0307-904x(98)00012-2}, pages = {113 -- 136}, year = {1998}, language = {en} } @article{WeberKuttlerWeber2006, author = {Weber, Stephan and Kuttler, Wilhelm and Weber, Konradin}, title = {Flow characteristics and particle mass and number concentration variability within a busy 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M. and Reichardt, Roland and Treiber, K.}, title = {High-Precision Power Measurement for the Grindability Test According to Zeisel}, series = {Chemical Engineering \& Technology}, volume = {35}, journal = {Chemical Engineering \& Technology}, number = {11}, publisher = {Wiley}, doi = {10.1002/ceat.201200118}, pages = {1941 -- 1948}, year = {2012}, language = {en} } @article{CarapezzaBarberiRanaldietal.2012, author = {Carapezza, M. L. and Barberi, F. and Ranaldi, M. and Ricci, T. and Tarchini, L. and Barrancos, Jos{\´e} and Fischer, C. and Granieri, D. and Lucchetti, C. and Melian, G. and Perez, N. and Tuccimei, P. and Vogel, A. and Weber, Konradin}, title = {Hazardous gas emissions from the flanks of the quiescent Colli Albani volcano (Rome, Italy)}, series = {Applied Geochemistry}, volume = {27}, journal = {Applied Geochemistry}, number = {9}, publisher = {Elsevier}, doi = {10.1016/j.apgeochem.2012.02.012}, pages = {1767 -- 1782}, year = {2012}, language = {en} } @article{WolfGaidaStuhlsatzetal.2013, author = {Wolf, Christian and Gaida, Daniel and Stuhlsatz, Andr{\´e} and Ludwig, Thomas and McLoone, Se{\´a}n and Bongards, Michael}, title = {Predicting organic acid concentration from UV/vis spectrometry measurements - a comparison of machine learning techniques}, series = {Transactions of the Institute of Measurement and Control}, volume = {35}, journal = {Transactions of the Institute of Measurement and Control}, number = {1}, publisher = {sage journals}, doi = {10.1177/0142331211403797}, pages = {5 -- 15}, year = {2013}, language = {en} } @article{SchrammAdam2014, author = {Schramm, Sebastian and Adam, Mario}, title = {Storage in Solar Process Heat Applications}, series = {Energy Procedia}, volume = {48}, journal = {Energy Procedia}, publisher = {Elsevier}, issn = {1876-6102}, doi = {10.1016/j.egypro.2014.02.136}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27244}, pages = {1202 -- 1209}, year = {2014}, language = {en} } @article{GaidaWeinbergJahr2014, author = {Gaida, Philipp and Weinberg, Kerstin and Jahr, Andreas}, title = {Viscoelastic modelling and experimental results of a dielectric electro-active polymer diaphragm actuator}, series = {Proceedings in Applied Mathematics and Mechanics (PAMM)}, volume = {14}, journal = {Proceedings in Applied Mathematics and Mechanics (PAMM)}, number = {1}, edition = {85th Annual Meeting of the GAMM. 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O.}, title = {Successive Aeroacoustic Transfer of Leading Edge Serrations From Single Airfoil to Low-Pressure Fan Application}, series = {Journal of Engineering for Gas Turbines and Power}, volume = {141}, journal = {Journal of Engineering for Gas Turbines and Power}, number = {10}, publisher = {ASME}, doi = {10.1115/1.4044362}, year = {2019}, language = {en} } @article{WiesmannYounSuhKaluzaetal.2020, author = {Wiesmann, Thomas and Youn Suh, Sung and Kaluza, Stefan and Lohmann, Heiko and Zeidler-Fandrich, Barbara}, title = {Catalytic Oxygen Removal from Synthetic Coke Oven Gas: A Comparison of Sulfided CoMo/γ-Al 2 O 3 and NiMo/γ-Al 2 O 3 Catalysts with Pt/γ-Al 2 O 3 as Benchmark Catalyst}, series = {Chemie Ingenieur Technik}, volume = {92}, journal = {Chemie Ingenieur Technik}, number = {10}, publisher = {Wiley}, doi = {10.1002/cite.202000067}, pages = {1533 -- 1541}, year = {2020}, language = {en} } @article{NoltingSpiegelReichetal.2020, author = {Nolting, Lars and Spiegel, Thomas and Reich, Marius and Adam, Mario and Praktiknjo, Aaron}, title = {Can energy system modeling benefit from artificial neural networks? Application of two-stage metamodels to reduce computation of security of supply assessments}, series = {Computers \& Industrial Engineering}, volume = {142}, journal = {Computers \& Industrial Engineering}, publisher = {Elsevier}, issn = {0360-8352}, doi = {10.1016/j.cie.2020.106334}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-26979}, year = {2020}, language = {en} } @article{GirodLohmannSchlueteretal.2020, author = {Girod, Kai and Lohmann, Heiko and Schl{\"u}ter, Stefan and Kaluza, Stefan}, title = {Methanol Synthesis with Steel-Mill Gases: Simulation and Practical Testing of Selected Gas Utilization Scenarios}, series = {Processes}, volume = {8}, journal = {Processes}, number = {12}, publisher = {MDPI}, doi = {10.3390/pr8121673}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-26928}, year = {2020}, language = {en} } @article{BiedermannReichPaschereit2020, author = {Biedermann, Till M. and Reich, M. and Paschereit, C. O.}, title = {Multi-Objective Modeling of Leading-Edge Serrations Applied to Low-Pressure Axial Fans}, series = {Journal of Engineering for Gas Turbines and Power}, volume = {142}, journal = {Journal of Engineering for Gas Turbines and Power}, number = {11}, publisher = {ASME}, doi = {10.1115/1.4048599}, year = {2020}, language = {en} } @article{BeckerLippelStuhlsatzetal.2020, author = {Becker, Martin and Lippel, Jens and Stuhlsatz, Andr{\´e} and Zielke, Thomas}, title = {Robust dimensionality reduction for data visualization with deep neural networks}, series = {Graphical Models}, volume = {108}, journal = {Graphical Models}, publisher = {Elsevier}, issn = {1524-0703}, doi = {10.1016/j.gmod.2020.101060}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-26904}, pages = {101060}, year = {2020}, language = {en} } @article{BiedermannChongKameieretal.2017, author = {Biedermann, Till M. and Chong, Tze Pei and Kameier, Frank and Paschereit, Christian O.}, title = {Statistical-Empirical Modeling of Airfoil Noise Subjected to Leading-Edge Serrations}, series = {AIAA Journal}, volume = {55}, journal = {AIAA Journal}, number = {9}, publisher = {ARC}, doi = {10.2514/1.j055633}, pages = {3128 -- 3142}, year = {2017}, language = {en} } @article{ScherpenDraghiciNiemann2018, author = {Scherpen, F. and Draghici, Anca and Niemann, J{\"o}rg}, title = {Customer Experience Management to Leverage Customer Loyalty in the Automotive Industry}, series = {Procedia - Social and Behavioral Sciences}, volume = {238}, journal = {Procedia - Social and Behavioral Sciences}, edition = {14th International Symposium in Management, Challenges and Innovation in Management and Entrepreneurship, 27-28 October 2017}, publisher = {Elsevier}, issn = {1877-0428}, doi = {10.1016/j.sbspro.2018.04.014}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-25198}, pages = {374 -- 380}, year = {2018}, language = {en} } @article{RoedderFrankKirschneretal.2018, author = {R{\"o}dder, Maximilian and Frank, Lena and Kirschner, Daniel and Neef, Matthias and Adam, Mario}, title = {EnergiBUS4home - Sustainable energy resourcing in low-energy buildings}, series = {Energy}, volume = {159}, journal = {Energy}, publisher = {Elsevier}, doi = {10.1016/j.energy.2018.06.145}, pages = {638 -- 647}, year = {2018}, language = {en} } @article{NiemannBassonFusseneckeretal.2018, author = {Niemann, J{\"o}rg and Basson, A. and Fussenecker, Claudia and Kruger, K. and Schl{\"o}sser, M. and Turek, S. and Amarnath, H. Umadevi}, title = {Implementation of Eye-Tracking Technology in Holonic Manufacturing Systems}, series = {Procedia - Social and Behavioral Sciences}, volume = {238}, journal = {Procedia - Social and Behavioral Sciences}, edition = {SIM 2017: 14th International Symposium in Management, Challenges and Innovation in Management and Entrepreneurship}}, publisher = {Elsevier}, doi = {10.1016/j.sbspro.2018.03.005}, pages = {37 -- 45}, year = {2018}, language = {en} } @article{BenimDiederichPfeiffelmann2018, author = {Benim, Ali Cemal and Diederich, Michael and Pfeiffelmann, Bj{\"o}rn}, title = {Aerodynamic Optimization of Airfoil Profiles for Small Horizontal Axis Wind Turbines}, series = {Computation}, volume = {6}, journal = {Computation}, number = {2}, publisher = {MDPI}, issn = {2079-3197}, doi = {10.3390/computation6020034}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-25143}, year = {2018}, language = {en} } @article{DehmerNiemann2018, author = {Dehmer, Joanna and Niemann, J{\"o}rg}, title = {Value Chain Management Through Cloud-based Platforms}, series = {Procedia - Social and Behavioral Sciences}, volume = {238}, journal = {Procedia - Social and Behavioral Sciences}, edition = {SIM 2017: 14th International Symposium in Management, Challenges and Innovation in Management and Entrepreneurship, 27-28 October 2017, Timisoara, Romania}, publisher = {Elsevier}, doi = {10.1016/j.sbspro.2018.03.021}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-25126}, pages = {177 -- 181}, year = {2018}, abstract = {The transformation of traditional value chain processes towards a digital value chain management enables companies to sustainably establish and retain a competitive market position. Digitisation offers the opportunity to design and operate expansive process chains with efficient process operations via co-operative platforms. Increased customer loyalty („lock-in") via integrated measures at the front-end raises utilization and planning certainty for the technological recovery system.}, language = {en} } @article{BenimCicekEker2018, author = {Benim, Ali Cemal and {\c{C}}i{\c{c}}ek, Ayd{\i}n and Eker, Arif Mert}, title = {A Computational Investigation of the Thermohydraulics of an EGS Project}, series = {Journal of Thermal Science}, volume = {27}, journal = {Journal of Thermal Science}, number = {5}, publisher = {Springer}, issn = {1003-2169}, doi = {10.1007/s11630-018-1033-0}, pages = {405 -- 412}, year = {2018}, language = {en} } @article{DeckertSchomaker2019, author = {Deckert, Carsten and Schomaker, Rahel M.}, title = {Cultural Impacts on National Innovativeness: Not Every Cultural Dimension Is Equal}, series = {Cross-Cultural Research}, volume = {53}, journal = {Cross-Cultural Research}, number = {2}, publisher = {sage journals}, doi = {10.1177/1069397118799700}, pages = {186 -- 214}, year = {2019}, language = {en} } @article{BhattacharyyaChattopadhyayGuinetal.2019, author = {Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Guin, Anindya and Benim, Ali Cemal}, title = {Investigation of Inclined Turbulators for Heat Transfer Enhancement in a Solar Air Heater}, series = {Heat Transfer Engineering}, volume = {40}, journal = {Heat Transfer Engineering}, number = {17/18}, publisher = {Taylor \& Francis}, doi = {10.1080/01457632.2018.1474593}, pages = {1451 -- 1460}, year = {2019}, language = {en} } @techreport{DeckertSchomakerKnappitsch2020, author = {Deckert, Carsten and Schomaker, Rahel M. and Knappitsch, Eithne}, title = {Culture and Entrepreneurship: The Political, Social and Individual Influences on Opportunity Entrepreneurs}, publisher = {Hochschule D{\"u}sseldorf}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, issn = {2627-8375}, doi = {10.20385/2627-8375_3}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-23837}, pages = {33}, year = {2020}, abstract = {The impact of culture on entrepreneurship is a widely accepted phenomenon. Cultural factors influence entrepreneurship via different mechanisms on the macro-, meso-, and micro-level of a country. Building on existing research, we draw a clear link between national cultural dimensions and entrepreneurship, using a new model that arranges different cultural dimensions in groups based on their particular function: political, social, or individual (PSI-model) and that distinguishes between values and practices where relevant. The PSI-model provides a coherent theoretical framework on which different cultural dimensions and their impact on entrepreneurship can be analysed, allowing for particular attention to be drawn to social practices and social values. This paper contributes to a better understanding of the relationship between culture and entrepreneurship, providing empirical evidence of how specific cultural dimensions influence entrepreneurship. The findings are of relevance from a policy perspective and can be used to generate practical recommendations for national institutions interested in promoting entrepreneurship and entrepreneurial activities. The findings are also transferable to other fields related to national cultural dimensions such as level of innovation, investment, budgeting etc.}, language = {en} } @techreport{NiemannBruckmannKrautzer2020, author = {Niemann, J{\"o}rg and Bruckmann, Julian and Krautzer, Florian}, title = {Green City Deals: A study on the global warming potential of alternative urban transportation systems}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, doi = {10.20385/kd43-fz18}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-28972}, pages = {14}, year = {2020}, abstract = {The population is growing constantly in urban areas. This results in an increasing demand for mobility solutions while it is also worldwide aimed to reduce greenhouse gas emissions. This paper summarizes the results of a comparative study concerning the greenhouse gas emissions (based on carbon footprint) caused by alternative urban passenger transportation systems. The emissions for the vehicles and their infrastructure are analyszed over the entire life cycle from manufacturing up to their end of life. An existing cable car sytem in La Paz, Bolivia was analysed and evaluated in comparison to other modes of transportation such as small busses, large busses and a tram. According to the system definitions and the considered balance framework the study shows that beside the use of the systems the materials and the manufacturing as well as the infrastructure have a significant impact on the total emissions over the life cycle. To put focus on the „true and real" impacts to the society it is preferable to consider the measurement results in total absolute emissions.}, language = {en} } @misc{OPUS4-2152, title = {Proceedings of the HSD Student Engineering Conferences | Issue 1: Selected Papers from the Courses 2018/2019}, editor = {Neef, Matthias and Zielke, Thomas and Fussenecker, Claudia and Niemann, J{\"o}rg}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, issn = {2700-1857}, doi = {10.20385/2700-1857/2020.1}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-21527}, pages = {45}, year = {2020}, language = {en} } @inproceedings{NeefHummel2000, author = {Neef, Matthias and Hummel, Dietrich}, title = {Euler solutions for a finite-span flapping wing}, series = {"Fixed, flapping and rotary wing vehicles at very low Reynolds numbers, Notre Dame, Indiana, USA}, booktitle = {"Fixed, flapping and rotary wing vehicles at very low Reynolds numbers, Notre Dame, Indiana, USA}, year = {2000}, language = {en} } @inproceedings{NeefHepermannSuerkenetal.2007, author = {Neef, Matthias and Hepermann, Florian and S{\"u}rken, Norbert and Schettel, Joachim}, title = {Brush Seal Porosity Modeling: Applicability and Limitations}, series = {ETC7 - 7th Conference on Turbomachinery, Athens}, booktitle = {ETC7 - 7th Conference on Turbomachinery, Athens}, address = {Athens}, year = {2007}, language = {en} } @inproceedings{HelmSpliethoffNeef2007, author = {Helm, Peter and Spliethoff, Hartmut and Neef, Matthias}, title = {Closing the Gap: Measuring Bristle Blow Down of Brush Seals}, series = {19 th International Conference on Fluid Sealing, Poitiers}, booktitle = {19 th International Conference on Fluid Sealing, Poitiers}, address = {Poitiers}, year = {2007}, language = {en} } @inproceedings{RoedderNeefLauxetal.2015, author = {R{\"o}dder, Maximilian and Neef, Matthias and Laux, Christoph and Priebe, Klaus-P.}, title = {Systematic Fluid Selection for Organic Rankine Cycles (ORC) and Performance Analysis for a Combined High and Low Temperature Cycle}, series = {Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration}, booktitle = {Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration}, publisher = {American Society of Mechanical Engineers}, organization = {International Gas Turbine Institute}, isbn = {978-0-7918-5667-3}, doi = {10.1115/GT2015-42432}, year = {2015}, abstract = {The organic Rankine cycle (ORC) is an established thermodynamic process that converts waste heat to electric energy. Due to the wide range of organic working fluids available the fluid selection adds an additional degree of freedom to the early design phase of an ORC process. Despite thermodynamic aspects such as the temperature level of the heat source, other technical, economic and safety aspects have to be considered. For the fluid selection process in this paper, 22 criteria were identified in six main categories while distinguishing between elimination and tolerance criteria. For an ORC design, the suggested method follows a practical engineering approach and can be used as a structured way to limit the number of interesting working fluids before starting a detailed performance analysis of the most promising candidates. For the first time the selection process is applied to a two-stage reference cycle which uses the waste heat of a large reciprocating engine for cogeneration power plants. It consists of a high temperature and a low temperature cycle in which the condensation heat of the high temperature (HT) cycle provides the heat input of the low temperature (LT) cycle. After the fluid selection process the detailed thermodynamic cycle design is carried out with a thermodynamic design tool that also includes a database for organic working fluids. The investigated ORC cycle shows a net thermal efficiency of about 17,4\% in the high temperature cycle with Toluene as the working fluid and 6,2\% in low temperature cycle with iso-Butane as the working fluid. The electric efficiency of the cogeneration plant increases from 40,4\% to 46,97\% with the both stages of the two-stage ORC in operation.}, language = {en} } @incollection{JonesCastroMahmoudetal.2002, author = {Jones, Kevin and Castro, Breno and Mahmoud, Osama and Pollard, S. and Platzer, Max and Neef, Matthias and Gonet, K. and Hummel, D.}, title = {A collaborative numerical and experimental investigation of flapping-wing propulsion}, series = {40th AIAA Aerospace Sciences Meeting \& Exhibit}, booktitle = {40th AIAA Aerospace Sciences Meeting \& Exhibit}, publisher = {American Institute of Aeronautics and Astronautics}, address = {Reston, Virigina}, doi = {10.2514/6.2002-706}, pages = {36}, year = {2002}, abstract = {An international, collaborative investigation is undertaken to evaluate the relative merits and limitations of various numerical methods and experimental measurement techniques, specifically for the analysis of flapping-wing propulsion. A finite aspect-ratio configuration is extensively investigated, both quantitatively and qualitatively, in a low-speed wind tunnel. Direct force measurements are made, as well as time-accurate and time-averaged laser Doppler velocimetry and unsteady flow visualization. The reduced frequency, mean angle of attack, aspect ratio and Reynolds number are varied in the experiments. The experiment is numerically simulated using flatplate theory, two and three-dimensional panel codes, and two and three-dimensional Euler and Navier- Stokes solvers. The ability of each of the methods to capture important aspects of the flow physics are evaluated through comparisons with each other and the experimental data. Additionally, the comparisons indicate areas where further research is needed. The collaborative effort provides a survey of available capabilities and provides a fixed set of flappingwing data for others to compare against.}, language = {en} } @article{NeefFritzenSchumacher2003, author = {Neef, Matthias and Fritzen, J. P. and Schumacher, G.}, title = {Evaluation of mount loads in dynamic testing of a jet engine}, series = {Mechanical Systems and Signal Processing}, volume = {17}, journal = {Mechanical Systems and Signal Processing}, number = {3}, publisher = {Elsevier}, doi = {10.1006/mssp.2001.1405}, pages = {665 -- 681}, year = {2003}, abstract = {In the dynamic testing of jet engines the evaluation of loads on the mount structure is vital for comparison with finite element calculations of such testing. Measuring these loads with the help of strain gauges applied to the structure becomes difficult if the mount is overdetermined and thus not every strain gauge can be assigned to a single load direction. In this study, the overdetermined mount structure of the BR715 engine was examined at one of the three mounting points between the Boeing 717 airframe and the engine, where loads in five directions were reacted. Firstly, the dependence of five measured strains upon known static load conditions at the mounting point had to be determined. For this purpose a static calibration test was carried out where defined forces and moments in known directions were applied to the structure while the output from five strain gauges was measured accordingly. The result was the desired relationship between loads and strains in terms of a matrix, which yields the corresponding load condition of the examined mounting point if multiplied with a set of strains. The same calibration procedure was carried out with a finite element model of the mount, where direct comparison to dynamic load results from the model itself was possible. With this model the validity of the above method was shown as well as possible errors which may occur while evaluating dynamic test results. The method was found to give satisfactory results even for dynamic loading, although some inertia forces disturb the signals in dynamic testing. Finally, the results from an actual dynamic engine test were processed into loads and then compared to the simulated loads from a finite element model of the engine. Good agreement was found and the indication of any remaining discrepancies was used to update the model for an even better representation of the dynamic test loads.}, language = {en} } @incollection{NeefHummel2001, author = {Neef, Matthias and Hummel, Dietrich}, title = {Euler Solutions for a Finite-Span Flapping Wing}, series = {Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications}, volume = {16}, booktitle = {Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications}, editor = {Mueller, Thomas J.}, publisher = {American Institute of Aeronautics and Astronautics}, address = {Reston, VA}, isbn = {978-1-56347-517-7}, doi = {10.2514/5.9781600866654.0429.0451}, pages = {429 -- 451}, year = {2001}, language = {en} } @incollection{NeefHummel2002, author = {Neef, Matthias and Hummel, D.}, title = {Euler and Navier-Stokes Solutions for Flapping Wing Propulsion}, series = {High Performance Computing in Science and Engineering '01}, volume = {30}, booktitle = {High Performance Computing in Science and Engineering '01}, editor = {Krause, Egon and J{\"a}ger, Willi}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-642-62719-4}, doi = {10.1007/978-3-642-56034-7_37}, pages = {386 -- 395}, year = {2002}, language = {en} } @inproceedings{WindteRadespielNeef2005, author = {Windte, Jan and Radespiel, Rolf and Neef, Matthias}, title = {Aerodynamic Analysis of Flapping Airfoil Propulsion at Low Reynolds Numbers}, series = {MEGAFLOW - Numerical Flow Simulation for Aircraft Design}, volume = {NNFM, 89}, booktitle = {MEGAFLOW - Numerical Flow Simulation for Aircraft Design}, editor = {Kroll, Norbert and Fassbender, Jens K.}, publisher = {Springer-Verlag}, address = {Berlin, Heidelberg}, isbn = {978-3-540-24383-0}, doi = {10.1007/3-540-32382-1_21}, pages = {299 -- 313}, year = {2005}, language = {en} } @inproceedings{VoelkerCaseyNeefetal.2005, author = {V{\"o}lker, Lutz and Casey, Michael and Neef, Matthias and St{\"u}er, Heinrich}, title = {The Flow Field and Performance of a Model Low Pressure Steam Turbine}, series = {6th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics : conference proceedings; 7-11 March 2005, Lille, France}, booktitle = {6th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics : conference proceedings; 7-11 March 2005, Lille, France}, address = {Lille}, organization = {{\´E}cole Nationale Sup{\´e}rieure d'Arts et M{\´e}tiers}, year = {2005}, abstract = {A 3-stage model of a low pressure steam turbine has been equipped with extensive instrumentation to assess aerodynamic performance and for validation of numerical methods. Emphasis was placed on detailed measurements at the inlet and exit of the last stage guide vane. Two configurations were examined - the first used a guide vane with lean in the last stage and a the second used a guide vane combining both lean and sweep. The experimental results from the two configurations have been compared with data from various design methods, ranging from through-flow to 3D multistage viscous simulations with mixing planes. Despite the challenges in modelling complex rotating blades in a wet steam environment, good agreement between the numerical and experimental results was obtained, and the new stator vane combining lean and sweep achieved the desired increase in reaction at the hub section.}, language = {en} } @inproceedings{HurdTruckenmuellerThammetal.2005, author = {Hurd, Paul and Truckenmueller, Frank and Thamm, Norbert and Pollak, Helmut and Neef, Matthias and Deckers, Mathias}, title = {Modern Reaction HP/IP Turbine Technology Advances and Experiences}, series = {Proceedings of the ASME Power Conference - 2005 : includes papers from the 2005 International Conference on Power Engineering (ICOPE) ; presented at the 2005 ASME Power Conference, April 5 - 7, 2005, Chicago, Illinois, USA}, booktitle = {Proceedings of the ASME Power Conference - 2005 : includes papers from the 2005 International Conference on Power Engineering (ICOPE) ; presented at the 2005 ASME Power Conference, April 5 - 7, 2005, Chicago, Illinois, USA}, publisher = {ASME}, address = {New York}, isbn = {0-7918-4182-0}, doi = {10.1115/PWR2005-50085}, pages = {425 -- 435}, year = {2005}, language = {en} } @inproceedings{NeefSuldaSuerkenetal.2006, author = {Neef, Matthias and Sulda, Erik and S{\"u}rken, Norbert and Walkenhorst, Jan}, title = {Design Features and Performance Details of Brush Seals for Turbine Applications}, series = {Proceedings of the ASME Turbo Expo 2006 : presented at the 2006 ASME Turbo Expo, May 6 - 11, 2006, Barcelona, Spain}, volume = {3}, booktitle = {Proceedings of the ASME Turbo Expo 2006 : presented at the 2006 ASME Turbo Expo, May 6 - 11, 2006, Barcelona, Spain}, publisher = {ASME}, address = {New York}, organization = {American Society of Mechanical Engineers Corporation; International Gas Turbine Institute Corporation}, isbn = {0-7918-4238-X}, doi = {10.1115/GT2006-90404}, pages = {1385 -- 1392}, year = {2006}, abstract = {Adaptive and contacting seals such as brush seals have been successfully applied to turbomachinery for several years. In large steam turbine applications, however, various challenges still persist. Special focus is directed at the long-term performance and longevity of brushes on conventional spring-backed seal segments in steam turbines. This issue is particularly related to wear during startup conditions. This paper discusses the results of wear tests, derived from simulated transient turbine behavior, where the resultant seal leakage under steady state conditions is monitored. It is shown that the brush seal is significantly capable of adapting to varying operating conditions, but exhibits a degree of performance degradation during the initial startups. Together with previously reported mid-term wear data and an experience based long-term phenomenological approach a general model for brush seal performance degradation is developed. This model can be used for performance prediction and exerts influence on brush seal design.}, language = {en} } @inproceedings{HelmPugachevNeef2008, author = {Helm, Peter and Pugachev, Alexander and Neef, Matthias}, title = {Breaking the Swirl With Brush Seals: Numerical Modeling and Experimental Evidence}, series = {Proceedings of the ASME Turbo Expo 2008 : presented at the 2008 ASME Turbo Expo, June 9 - 13, 2008, Berlin, Germany}, volume = {4}, booktitle = {Proceedings of the ASME Turbo Expo 2008 : presented at the 2008 ASME Turbo Expo, June 9 - 13, 2008, Berlin, Germany}, publisher = {ASME}, address = {New York}, organization = {American Society of Mechanical Engineers Corporation; International Gas Turbine Institute Corporation}, isbn = {978-0-7918-4314-7}, doi = {10.1115/GT2008-50257}, pages = {1387 -- 1396}, year = {2008}, abstract = {Striving for smaller losses in turbomachinery has led to many advancements in the design of seals. Modern sealing concepts such as brush seals hold a great potential to increase the efficiency of both flight engines and stationary turbines. At the same time, in order to maintain stable operating conditions of the rotor, swirl-induced forces must be kept at a minimum in the sealing channels. Therefore, the influence of the permeable and flexible bristle pack of brush seals on the flow around the rotor surface must be known. In this paper the swirl flow in the cavities of two different seal geometries is studied experimentally and numerically. A conventional three-tooth labyrinth serves as a reference. A second seal arrangement with a bristle pack upstream of two teeth is compared with the reference labyrinth. The swirl is evaluated experimentally from total and static pressure measurements in various axial and circumferential positions. Additionally, the axial swirl distribution is calculated using computational fluid dynamics (CFD). Here, the numerical model of the brush seal is based on the porous medium approach and is calibrated using the experimental values of the leakage and the bristle clearance by adjusting the thickness of the bristle pack. The calibrated CFD model is then used to study the impact of the brush seal on the swirl component of the sealing flow. The observed significant decrease of the swirl by the brush seal shows good agreement with the experimental data. The impact of changes in bristle pack clearance on the swirl is also investigated and compared with experimental evidence. The aim is to show that the brush seals have a natural tendency to interrupt seal swirl. They can therefore be used for swirl control in order to create a beneficial impact on the dynamic stability of turbomachines.}, language = {en} } @incollection{RoedderLauxNeef2015, author = {R{\"o}dder, Maximilian and Laux, Christoph and Neef, Matthias}, title = {Systematic fluid selection in early stages of ORC design: a practical engineering approach}, series = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute}, volume = {3: Coal, biomass and alternative fuels - cycle innovations - electric power - industrial and cogeneration}, booktitle = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute}, publisher = {International Gas Turbine Institute (ASME)}, address = {New York}, isbn = {978-0-7918-5667-3}, year = {2015}, language = {en} } @inproceedings{LauxGoebelNeefetal.2015, author = {Laux, Christoph and Goebel, Johannes and Neef, Matthias and Gotter, Andreas}, title = {Investigation in the Technical and Economic Feasibility of a Low-Pressure Steam Cycle for the Waste Heat Utilization of a Cogeneration Plant}, series = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute}, volume = {3: Coal, biomass and alternative fuels - cycle innovations - electric power - industrial and cogeneration}, booktitle = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute}, publisher = {International Gas Turbine Institute (ASME)}, address = {New York}, isbn = {978-0-7918-5667-3}, year = {2015}, abstract = {This paper deals with the investigation in the technical and economic feasibility of a low-pressure steam cycle for the waste heat utilization of a combined heat and power (CHP) plant. The proposed steam cycle uses a pressure level below atmospheric pressure which allows to use the heat from the motor's coolant for evaporation. The cycle is designed to increase the maximum electrical efficiency of a gas fired reciprocating engine and to increase operational flexibility for varying heat demand. Since organic Rankine cycle (ORC) plants are already being successfully used for waste heat recovery, advantages of the low-pressure steam Rankine cycle (SRC) over an ORC are highlighted. Many ORC fluids are toxic or flammable and thus have an increased risk potential compared to water. An additional advantage of water compared to ORC fluids is the possibility of superheating above 500 °C. The technical feasibility of the proposed cycle is studied by the detailed design of the individual system components such as turbine, heat exchangers and auxiliary parts. This includes the detailed thermodynamic design of the full cycle for the calculation of plant efficiencies. As a basis for future experimental investigations, a cogeneration plant with an electrical output of 50 kWel was selected as a heat source for the steam cycle. The design geometries of the turbine and the heat exchanger are presented along with efficiency and cost predictions. A subsonic radial turbine with a rotational speed of 155,000 rpm was selected. The maximum turbine output is about 7.5 kW. The use of a flash evaporator is investigated to reduce the size and the costs for the evaporator. The suggested steam cycle helps to increase the electrical efficiency of the CHP plant by 4.5\% points from an original 36.5\% to 41.0\%. The steam cycle itself has an electrical efficiency of approximately 9\%. Additionally, the condensation temperature in this steam cycle is high enough to be extracted as useful heat output to generate domestic water with a temperature of 50°C.}, language = {en} } @inproceedings{ZielkeNeefFussenecker2017, author = {Zielke, Thomas and Neef, Matthias and Fussenecker, Claudia}, title = {Teaching Engineering Conferences}, series = {Proceedings of the Canadian Engineering Education Association (CEEA) Conference}, booktitle = {Proceedings of the Canadian Engineering Education Association (CEEA) Conference}, address = {Winnipeg}, organization = {Canadian Engineering Education Association (CEEA)}, year = {2017}, abstract = {This article is on a university course called Engineering Conferences. It has been developed by the authors and installed as a mandatory part of the curriculum in three master's degree programs for engineering students. The participants of the course are postgraduates with different nationalities, mostly German, and different technical backgrounds. They study Mechanical Engineering, Simulation and Experimental Technology, or International Business Engineering. The basic idea of the course concept goes far beyond simply teaching the standards of academic writing and skills for using scientific publications. By using a learnercentered approach, the students get engaged in typical activities around an active attendance of a real conference. Students learn to locate the field of their bachelor thesis or project report in the world of research communities, scientific journals and engineering conferences. They learn about conferences matching their bachelor/project topic. They write a paper complying with common academic standards, submit it to a mock-up conference, and review submissions of their fellow students. Students also produce a poster and have to defend it in a poster session held publicly on the campus. Engineering Conferences is a course on scientific communication and presentation that also aims at the development of other skills and competences needed in the world of modern engineering.}, language = {en} } @incollection{NeefZielkeFussenecker2017, author = {Neef, Matthias and Zielke, Thomas and Fussenecker, Claudia}, title = {Engineering Conferences - An Innovative Course for Master Students in Engineering}, series = {Exploring Teaching for Active Learning in Engineering Education}, booktitle = {Exploring Teaching for Active Learning in Engineering Education}, editor = {Danish Network for Engineering Education,}, address = {Odense}, organization = {Danish Network for Engineering Education (IUPN)}, isbn = {978-87-998898-1-5}, pages = {13 -- 24}, year = {2017}, abstract = {A course called "Engineering Conferences" is presented that the authors have developed and installed as a mandatory part of the curriculum in Master programs for engineering students. The idea is to go beyond teaching the standards of academic writing and skills for working with scientific publications. By using a learner-centered approach, we get the students engaged in typical activities around an active attendance of a real conference. They write a paper complying with common academic standards, submit the paper and review submissions of their fellow students. Students also produce a poster and have to defend it in a poster session held publicly on campus. In this article, we present our rationale to develop the course and our results from the first semester teaching this course. This includes the presentation of useful resources for teaching and organizing scientific publishing as well as our reflected learning experience regarding the student's understanding of significance for scientific publishing.}, language = {en} } @incollection{NeefZielkeFussenecker2017, author = {Neef, Matthias and Zielke, Thomas and Fussenecker, Claudia}, title = {Engineering Conferences - An Innovative Course for Master Students in Engineering}, series = {Exploring Teaching for Active Learning in Engineering Education}, booktitle = {Exploring Teaching for Active Learning in Engineering Education}, editor = {Danish Network for Engineering Education,}, publisher = {Danish Network for Engineering Education (IUPN)}, address = {Odense}, isbn = {978-87-998898-1-5}, year = {2017}, abstract = {This poster summarizes a few facts, figures and resources related to the Master course "Engineering Conferences".}, language = {en} } @inproceedings{FesekerKinellNeef2017, author = {Feseker, Daniel and Kinell, Mats and Neef, Matthias}, title = {Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow}, series = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2017: presented at the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition, June 26-30, 2017}, booktitle = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2017: presented at the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition, June 26-30, 2017}, editor = {The American Society of Mechanical Engineers,}, publisher = {The American Society of Mechanical Engineers}, address = {New York}, isbn = {978-0-7918-5088-6}, doi = {10.1115/GT2017-64143}, year = {2017}, abstract = {The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54\%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties.}, language = {en} } @inproceedings{LauxGotterNeef2019, author = {Laux, Christoph and Gotter, Andreas and Neef, Matthias}, title = {Experimental investigation of a low pressure steam Rankine cycle for waste heat utilization of internal combustion engines}, series = {Proceedings of the 5th International Seminar on ORC Power Systems}, booktitle = {Proceedings of the 5th International Seminar on ORC Power Systems}, publisher = {The National Technical University of Athens (NTUA)}, address = {Athens}, isbn = {978-90-9032038-0}, year = {2019}, abstract = {High heat losses via exhaust gas and coolant in internal combustion engines (ICE) are the basis for numerous investigations regarding downstream processes for power generation. The most promising concepts are Organic Rankine Cycles (ORC) and Steam Rankine Cycles (SRC). In previous work of the Center of Innovative Energy Systems, D{\"u}sseldorf (Germany), the technical and economic feasibility of a low pressure SRC has been investigated and the advantages in comparison to organic Rankine cycles are highlighted. A distinctive feature of the cycle is the use of the ICE coolant heat for evaporation, which limits the cycles maximum steam pressure to values below atmospheric pressure. This work presents first results of a test rig with data reconciliation according to DIN 2048 to validate the simulation results and design calculations. As a basis for the experimental investigations, a gas fired CHP plant was selected. The design of the test rig is optimized for the operation in the laboratory, where the coolant heat is emulated by a tempering device and the exhaust heat of the CHP plant is emulated by a gas burner. With the designed test rig, it is possible to control the volume flow and the temperatures of the coolant and exhaust gas, so that different load conditions of the gas fired CHP plant can be investigated. For initial tests, the turbine in the SRC is replaced by a throttle to achieve the pressure drop of the turbine. The experimental results show, that the exhaust and coolant heat of a 36 kWel CHP plant can be emulated and the performance expectations of the cycle can be met in stable steady-state conditions. Based on the measurement results and the turbine design calculations an electric power output of the cycle of 3.8 kW will be possible, which results in a cycle efficiency of about 6.5 \% and an increase of the electrical power output of the CHP plant of about 10 \%. The results show that the plant concept is technically feasible and, with further optimization, also represents an alternative to ORC plants in terms of increasing the efficiency of a cogeneration plant.}, language = {en} } @article{RoedderNeefLauxetal.2016, author = {Roedder, Maximilian and Neef, Matthias and Laux, Christoph and Priebe, Klaus-P.}, title = {Systematic Fluid Selection for Organic Rankine Cycles and Performance Analysis for a Combined High and Low Temperature Cycle}, series = {Journal of Engineering for Gas Turbines and Power}, volume = {138}, journal = {Journal of Engineering for Gas Turbines and Power}, number = {031701}, publisher = {ASME}, doi = {10.1115/1.4031361}, pages = {168}, year = {2016}, abstract = {The organic Rankine cycle (ORC) is an established thermodynamic process that converts waste heat to electric energy. Due to the wide range of organic working fluids available the fluid selection adds an additional degree-of-freedom to the early design phase of an ORC process. Despite thermodynamic aspects such as the temperature level of the heat source, other technical, economic, and safety aspects have to be considered. For the fluid selection process in this paper, 22 criteria were identified in six main categories while distinguishing between elimination (EC) and tolerance criteria (TC). For an ORC design, the suggested method follows a practical engineering approach and can be used as a structured way to limit the number of interesting working fluids before starting a detailed performance analysis of the most promising candidates. For the first time, the selection process is applied to a two-stage reference cycle, which uses the waste heat of a large reciprocating engine for cogeneration power plants. It consists of a high temperature (HT) and a low temperature (LT) cycle in which the condensation heat of the HT cycle provides the heat input of the LT cycle. After the fluid selection process, the detailed thermodynamic cycle design is carried out with a thermodynamic design tool that also includes a database for organic working fluids. The investigated ORC cycle shows a net thermal efficiency of about 17.4\% in the HT cycle with toluene as the working fluid and 6.2\% in LT cycle with isobutane as the working fluid. The electric efficiency of the cogeneration plant increases from 40.4\% to 46.97\% with the both stages of the two-stage ORC in operation.}, language = {en} } @article{BonkLauxRoedderetal.2017, author = {Bonk, Christian Dirk and Laux, Christoph and R{\"o}dder, Maximilian and Neef, Matthias}, title = {Design of a 1 KW Organic Rankine Cycle for Teaching and Research Issues}, series = {Energy Procedia}, volume = {129}, journal = {Energy Procedia}, publisher = {Elsevier}, doi = {10.1016/j.egypro.2017.09.117}, pages = {931 -- 938}, year = {2017}, abstract = {This paper deals with the design of a micro-scale ORC plant for teaching and research including the development of an automated control concept. The aim is to provide a safe and environmentally acceptable micro-scale heat engine, which can be developed, implemented and used in university labs for the education of students as well as for small research projects. The test rig allows the support of several learning outcomes on a multi-disciplinary level particularly for the implementation and simulation of small power systems. Special attention was given to the organic working fluid characteristics and its selection process. In addition to the above-mentioned performance goals, favourable safety properties and low global warming potential were decisive in the selection of the novel organic fluid called 3M™ Novec™ 649. The performance and the fluid behaviour of Novec 649 in a micro-scale power cycle are of major interest and the research goal for the test rig presented in this paper. Due to the expected power output of 1 kW, a scroll expander was chosen as the generator drive for the micro plant. In order to design the major parts of the ORC, the thermodynamic simulation software EBSILON®Professional was used. The supply temperature was set to 140 °C. As a result of the simulation, feasible expander inlet pressures spread from 5.5 bar to 8.5 bar. This leads to thermal efficiencies of the ORC in the order of 5 \%. Adding a recuperator to the cycle system decreases the operating pressure range but in the end, the thermal efficiency can be increased by 1.5 \%-points up to 6.2 \%. Finally, an automated control concept is introduced, where the pump is controlled via the fill level measurement system.}, language = {en} } @article{FesekerKinellNeef2018, author = {Feseker, Daniel and Kinell, Mats and Neef, Matthias}, title = {Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow}, series = {Journal of Turbomachinery}, volume = {140}, journal = {Journal of Turbomachinery}, number = {7}, address = {ASME}, doi = {10.1115/1.4039842}, pages = {210}, year = {2018}, abstract = {The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54\%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties.}, language = {en} } @article{DubberkeLinnemannAbbasetal.2018, author = {Dubberke, Frithjof H. and Linnemann, Matthias and Abbas, Wameedh Khider and Baumh{\"o}gger, Elmar and Priebe, Klaus-Peter and Roedder, Maximilian and Neef, Matthias and Vrabec, Jadran}, title = {Experimental setup of a cascaded two-stage organic Rankine cycle}, series = {Applied Thermal Engineering}, volume = {131}, journal = {Applied Thermal Engineering}, publisher = {Elsevier}, doi = {10.1016/j.applthermaleng.2017.11.137}, pages = {958 -- 964}, year = {2018}, abstract = {In combination with a bottoming cycle, operated with a pure fluid in transcritical mode, the usage of a zeotropic mixture as a working fluid appears to be exergetically favorable for power cycle efficiency in cascaded two-stage organic Rankine cycles (CORC). A CORC is set up and initially tested with cyclopentane and propane as working fluids in its high temperature and low temperature cycle, respectively. A thermal oil cycle serves as the heat source and is powered electrically with a maximum heat flow of 158 kW. The design of this experimental setup allows for a rapid replacement of individual components and for a wide range of conditions in terms of fluids and thermodynamic states. The components of all cycles and the measurement and control technology are described in detail. A testing procedure is presented, followed by a discussion of the measurement results, where it is shown that the intended concept of two cascaded organic Rankine cycles is operational and that the measured data are consistent.}, language = {en} } @inproceedings{NeefFusseneckerNiemannetal.2018, author = {Neef, Matthias and Fussenecker, Claudia and Niemann, J{\"o}rg and Zielke, Thomas}, title = {Publish your undergraduate research! A mandatory course for master students in engineering}, series = {Creativity, innovation and entrepreneurship for engineering education excellence : proceedings of the 46th SEFI Annual Conference 2018, Copenhagen, Denmark}, booktitle = {Creativity, innovation and entrepreneurship for engineering education excellence : proceedings of the 46th SEFI Annual Conference 2018, Copenhagen, Denmark}, editor = {Clark, Robin and Munkebo Hussmann, Peter and J{\"a}rvinen, Hannu-Matti}, publisher = {SEFI - Soci{\´e}t{\´e} Europ{\´e}enne pour la Formation des Ing{\´e}nieurs}, address = {Brussels}, organization = {European Society for Engineering Education SEFI}, isbn = {978-2-87352-016-8}, year = {2018}, abstract = {Undergraduate students in engineering often have little exposure to the world of scientific publishing and the culture of sharing research work. While the beneficial exchange between research and teaching is well promoted, while the benefits of conference participation for students have already been surveyed and while courses on scientific writing are readily available, the concept of mini-conferences as part of the curriculum combines all three aspects into one. Therefore, the course "Engineering Conferences" was developed and installed as a mandatory part of a master program for engineering students. The idea is to go beyond simply teaching the standards of academic writing and skills for using scientific publications. By using a learner-centered approach, the students are engaged in typical activities around an active attendance of a real conference. Based on their bachelor thesis, they write a paper complying with common academic standards, submit the paper and review submissions of their fellow students. They also produce a poster and defend their work in a poster session held publicly on campus. This contribution is based on the experience from the first four terms teaching the course. It explains the didactic rationale behind the concept and individual teaching modules, it comprises the collection of useful resources for teaching and organizing scientific publishing and it includes the consequences drawn from course evaluation results.}, language = {en} } @phdthesis{Biedermann2019, author = {Biedermann, Till M.}, title = {Aeroacoustic transfer of leading edge serrations from single aerofoils to low-pressure fan applications}, publisher = {Technische Universit{\"a}t Berlin}, address = {Berlin}, organization = {Technische Univerit{\"a}t Berlin}, doi = {10.14279/depositonce-9075}, school = {Hochschule D{\"u}sseldorf}, pages = {221}, year = {2019}, abstract = {Leading edge serrations are well-known for their aeroacoustic potential in reducing aerofoil-turbulence interaction noise and are also associated with certain aerodynamic advantages. To prepare leading edge serrations for industrial application, two obstacles remain to be addressed. First is a combined analysis of the aeroacoustic and the aerodynamic performance of leading edge serrations to develop optimum designs. Second is the need to examine the transferability of the known effects of leading edge serrations from a single aerofoil to full rotors, which are considered to be the final area of application. This thesis aims to assist in the transfer of a well-investigated aerofoil with serrated leading edges from the rigid to the rotating domain. With this purpose, a single aerofoil type is selected and thoroughly analysed, experimentally and numerically, to generate a reliable data basis for aerodynamic performance and noise reduction capability. Aside from gathering information on the overall performance, the spatial distribution of the noise sources is localised, and the spectral composition of the noise reduction is found to follow a clearly defined scaling law. Aerodynamically, generated vortices are found to be responsible for a complex three-dimensional separation mechanism of the leading edge serrations, causing a delay of stall. The generated data basis is then used to design low-pressure axial fans of minimum complexity by keeping the initially chosen aerofoil type. The experimentally identified noise reduction mechanisms for the serrated axial fans are found to be more diverse than the single aerofoil and highly dependent on the inflow conditions and the operation point of the fan. A highly similar pattern for the spectral scaling of the noise reduction supports the finding that at optimum operation conditions, the previously identified noise reduction mechanisms for the single aerofoils are transferable to the rotating domain. On the other hand, additional aerodynamic mechanisms are found to dominate the noise reduction for the instability region of the fan, also contributing to reduced blade-to-blade interaction effects. Moreover, the blade-tip leakage flow is altered by delaying the development of coherent structures. The next step towards a more general description of the aeroacoustic and aerodynamic dependencies is developing a comprehensive model based on artificial neural networks. This model allows a combined analysis of the aerodynamic and acoustic performance of rotors with serrated leading edges and shows an accurate prediction of the overall performance and the spectral composition of the radiated noise. It also enables the development of multi-objective optima for serration designs and motivates further studies into the generalisability of the observed trends. Furthermore, the developed model represents a feasible tool to create tailored serration designs for maximum efficiency in both aeroacoustics and aerodynamics, contributing to the development of future low-noise fans and rotating machinery.}, language = {en} } @inproceedings{EversheimDeckertWestekemper2000, author = {Eversheim, Walter and Deckert, Carsten and Westekemper, Markus}, title = {Increasing Efficiency through Integration of Freeform-Features into the CAD/CAM Chain}, series = {Product Data Technology Europe 2000}, booktitle = {Product Data Technology Europe 2000}, pages = {355 -- 362}, year = {2000}, language = {en} } @inproceedings{Deckert2002, author = {Deckert, Carsten}, title = {Managing Knowledge and Best Practice in the Tool and Die Industry}, series = {17th Annual Conference of the South African Institute for Industrial Engineering}, booktitle = {17th Annual Conference of the South African Institute for Industrial Engineering}, address = {Stellenbosch}, year = {2002}, language = {en} } @inproceedings{DeckertWittberg2004, author = {Deckert, Carsten and Wittberg, Volker}, title = {Knowledge Management in Consulting - Value Added through Knowledge Exchange with EDEN}, publisher = {International Conference on Competitive Manufacturing}, address = {Stellenbosch}, year = {2004}, language = {en} } @techreport{SchererDeckert2013, author = {Scherer, Anke and Deckert, Carsten}, title = {The Dao of Innovation: What European innovators can learn from philosophical Daoism}, publisher = {EAMSA - Euro-Asia Management Studies Association}, address = {Duisburg}, organization = {EAMSA - Euro-Asia Management Studies Association}, year = {2013}, abstract = {The article argues that European innovators can profit from some of the concepts of philosophical Daoism, namely "wu-wei" (non-interference) and "ziran" ("go with the flow"). Whereas most Western approaches to innovation emphasize the different stages of the creative process as well as tools to enhance creativity, the Daoist world view allows for the mind to just wander and thus spontaneously discover the solution to a problem in a rather detached state of mind. Creative minds need space for personal development and the permission to wander around without being exposed to control and instant judgement on the results. Training individuals in the tools and techniques of problem solving and creativity as the common approach in innovation management is certainly necessary, but in the end it is the intellectual accomplishment of a creative mind that produces innovation. Managers can allow this to happen when they get the balance of control and non-interference right.}, language = {en} } @inproceedings{Deckert2014, author = {Deckert, Carsten}, title = {Why Some Ideas Refuse to Diffuse}, publisher = {KNect 365}, address = {M{\"u}nchen}, doi = {10.13140/RG.2.1.3379.2085}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-18193}, year = {2014}, abstract = {There is a popular saying in German: Innovation is when the market shouts "Hooray!". Thus, a new idea is only as good as its diffusion into the addressed social system. The question is what affects the adoption or rejection of a new idea. Carsten Deckert shares his experience on the main innovation resistances and on ways to increase the acceptance of new ideas. He talks about which perceived attributes of innovations are conducive to the rate of adoption of an innovation and which are characteristics of failed innovations.}, language = {en} } @incollection{DeckertMontiRaueiser2015, author = {Deckert, Carsten and Monti, Alessandro and Raueiser, Markus}, title = {A Brazilian Love Affair - Did ThyssenKrupp's Internationalization Strategy Fail?}, series = {Strategy case book}, booktitle = {Strategy case book}, editor = {Albers, Sascha}, publisher = {K{\"o}lner Wissenschaftsverlag}, address = {K{\"o}ln}, isbn = {978-3-942720-84-7}, pages = {123 -- 137}, year = {2015}, language = {en} } @techreport{DeckertSchererNyssenGuillen2015, author = {Deckert, Carsten and Scherer, Anke and Nyssen Guill{\´e}n, Viola}, title = {Cultural Impacts on National Innovativeness - Links between the GLOBE Cultural Dimensions and the GII and IUS Innovation Indexes}, series = {CBD Working Paper Series}, volume = {1}, journal = {CBD Working Paper Series}, publisher = {Cologne Business School}, address = {K{\"o}ln}, organization = {Cologne Business School}, year = {2015}, abstract = {The working paper at hand assumes that differences of innovativeness of different countries can be explained to a certain extent by cultural differences. Thus, the paper deals with the research question of which cultural dimensions have an influence on national innovativeness. Previous research mainly uses the Hofstede-dimensions to describe cultural differences and often focuses on single parameters to describe national innovativeness (e.g. number of patents per capita). This paper, instead, uses the dimensions of the GLOBE-study which builds on the findings of Hofstede but is more up-to-date and comprehensive and uses two innovation indexes - the Global Innovation Index (GII) and the Innovation Union Scoreboard (IUS) - to describe national innovativeness. The authors use correlation analysis to find relationships between the GLOBEdimensions and the innovation indexes. They find positive correlations of innovativeness (both indexes) to Future Orientation (practice scale), Gender Egalitarianism (value scale), Human Orientation (value scale) and Uncertainty Avoidance (practice scale) as well as negative correlations to In-Group Collectivism (practice scale), Future Orientation (value scale) and Uncertainty Avoidance (value scale). Some of the findings are contrary to existing hypotheses, e.g. only a weak negative correlation of Power Distance to one of the indexes. Furthermore the findings show significant differences between practice scales and value scales, especially concerning Future Orientation and Uncertainty Avoidance which deserve further examination. Overall it can be concluded that culture has an impact on national innovativeness. The different cultural dimensions of the GLOBE-study show a multi-faceted interrelationship between culture and innovation. To come to a concise answer for the question which dimensions affect national innovativeness in which way additional research will be necessary.}, language = {en} } @techreport{DeckertBussHasencleveretal.2016, author = {Deckert, Carsten and Buß, Mareike and Hasenclever, Stephanie and M{\"a}ckel, Frederic and Nyssen Guill{\´e}n, Viola and Silverio, Isabell and Wegner, Eileen}, title = {Beer Picking Game - Entwicklung und Realisierung eines Planspiels zur Simulation eines Kommissionierbereichs}, series = {CBS Working Paper Series}, volume = {2}, journal = {CBS Working Paper Series}, publisher = {Cologne Business School}, address = {K{\"o}ln}, organization = {Cologne Business School}, year = {2016}, language = {en} } @techreport{Deckert2015, author = {Deckert, Carsten}, title = {Tensions in Creativity - Using the Value Square to Model Individual Creativity}, series = {CBD Working Paper Series}, volume = {2}, journal = {CBD Working Paper Series}, publisher = {Cologne Business School}, address = {K{\"o}ln}, organization = {Cologne Business School}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-18209}, year = {2015}, abstract = {The definition of individual creativity is based on a tension between novelty on the one side and usefulness respectively appropriateness on the other side. The paper explores how this tension pervades the stage and componential theories of creativity. To achieve this, the so called value square ("Wertequadrat") developed by Helwig (1967) and Schulz von Thun (1998)is used which balances a value with its countervalue to analyze creativity. The author identifies tensions of action and inaction, expertise and mindfulness, precision and ambiguity as well as immersion and detachment permeating the creative process and the components of creativity. As a conclusion a morphological box for creativity is presented which allows one to show which combination of characteristics of the tensions support different stages of creativity. Furthermore implications for development and time management are discussed.}, language = {en} } @article{DeckertScherer2017, author = {Deckert, Carsten and Scherer, Anke}, title = {The Dao of Innovation: What European Innovators Can Learn from Philosophical Daoism}, series = {Kindai Management Review}, volume = {5}, journal = {Kindai Management Review}, number = {4}, pages = {105 -- 118}, year = {2017}, abstract = {A central question for managers in charge of innovation is to what extent creativity and inno-vation can be controlled and supervised, or whether they just have to be set free and allowed to take shape. In assessing this dilemma the authors conclude that there is a contradiction of action versus inaction on the personal level as well as a contradiction of control versus loss of control on the organizational level. What European innovators can learn from philosophical Daoism is an attitude that allows a process to just develop "naturally" and refrains from prem-ature interference with the intention to permanently be in control. In business structures that judge everything according to its usefulness, i.e. profitability for the company, a look at the laid-back attitude of Daoism where usefulness and uselessness are relative qualities might relief the pressure on people to perform in a premeditated way. Innovation can be supported, but creativity cannot be forced. It can only be allowed to happen when control, interference, and action are balanced out with non-interference, and go-with-the-flow. This attitude in not an excuse for stressed-out managers to neglect their duty, but a time honoured worldview of one of the oldest civilizations in the world that can give them the sovereignty to "get out of the way" and let innovation happen.}, language = {en} } @techreport{Deckert2016, author = {Deckert, Carsten}, title = {Tensions in Creative Products - Using the Value Square to Model Functional Creativity}, series = {CBS Working Paper Series}, volume = {4}, journal = {CBS Working Paper Series}, publisher = {Cologne Business School}, address = {K{\"o}ln}, organization = {Cologne Business School}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-18078}, year = {2016}, language = {en} } @inproceedings{Deckert2016, author = {Deckert, Carsten}, title = {Tensions in Corporate Creativity}, series = {Book of Papers}, booktitle = {Book of Papers}, organization = {M-Sphere - Association for Promotion of Multidisciplinarity in Science and Business}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-18065}, pages = {79 -- 86}, year = {2016}, abstract = {The standard definition of creativity is based on a tension between originality and effectiveness. Borrowing from the wave-particle duality in physics one could say that there is an originality-effectiveness duality at work for creativity. The paper explores how this tension pervades Amabile's (1997) componential theory of organizational creativity with the components organizational motivation, management practices (including work assignment and work control) and resources. As a method the so called value square (" Wertequadrat ") developed by Helwig (1967) and Schulz von Thun (1998) is used which balances a value with its countervalue. The author identifies a tension of corporate tradition and corporate change for organizational motivation, a tension of skills and challenges for work assignment, a tension of management by control and management by loss of control for work control as well as a tension of organizational efficiency and organizational slack for resources. Additionally different implications of these tensions for the resistance of a company to creativity, for an organizational climate conducive to creativity as well as for resource allocation in creative endeavours are discussed.}, language = {en} } @article{Deckert2016, author = {Deckert, Carsten}, title = {On the Originality-Effectiveness Duality of Creativity: Tensions Concerning the Components of Creativity}, series = {Business Creativity and the Creative Economy}, volume = {2}, journal = {Business Creativity and the Creative Economy}, number = {1}, doi = {10.18536/bcce.2016.10.2.1.07}, pages = {70 -- 82}, year = {2016}, abstract = {The standard definition of individual creativity is based on a tension between originality on the one side and effectiveness (usefulness and appropriateness) on the other side. In this article this tension is called the originality-effectiveness duality of creativity. The article explores how this duality pervades the componential theories of creativity. To analyze the components of creativity with regard to their tensions, the so called value square ("Wertequadrat") developed by Helwig (1967) and Schulz von Thun (1998) is used. The value square explains each component as a dynamic equilibrium and shows how a positive value is balanced with its positive countervalue. Tensions of mindfulness, precision and ambiguity, as well as immersion and detachment are identified permeating the components of creativity. This article explores the implications these tensions have for creativity research and for businesses in a creative economy.}, language = {en} } @article{Deckert2016, author = {Deckert, Carsten}, title = {Ecological sustainability of material resources - Why material efficiency just isn't enough}, series = {uwf UmweltWirtschaftsForum}, volume = {24}, journal = {uwf UmweltWirtschaftsForum}, number = {4}, publisher = {Springer}, doi = {10.1007/s00550-016-0419-2}, pages = {325 -- 335}, year = {2016}, language = {en} } @article{Deckert2017, author = {Deckert, Carsten}, title = {Tensions in Creative Products: Using the Value Square to Model Functional Creativity}, series = {International Journal of Creativity \& Problem Solving}, volume = {26}, journal = {International Journal of Creativity \& Problem Solving}, pages = {71 -- 93}, year = {2017}, language = {en} } @techreport{Deckert2017, author = {Deckert, Carsten}, title = {Creative Heuristics: A Framework for Systematic Creative Problem Solving}, series = {CBS Working Paper Series}, volume = {1}, journal = {CBS Working Paper Series}, publisher = {Cologne Business School}, address = {K{\"o}ln}, organization = {Cologne Business School}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-17982}, year = {2017}, language = {en} } @inproceedings{Deckert2018, author = {Deckert, Carsten}, title = {Creative Heuristics in Engineering Education}, series = {46th SEFI Annual Conference in Copenhagen 17-21 September 2018 "Creativity, Innovation and Entrepreneurship for Engineering Education Excellence"}, booktitle = {46th SEFI Annual Conference in Copenhagen 17-21 September 2018 "Creativity, Innovation and Entrepreneurship for Engineering Education Excellence"}, address = {Copenhagen}, year = {2018}, language = {en} } @techreport{DeckertRehbergRuetten2017, author = {Deckert, Carsten and Rehberg, David and R{\"u}tten, Pia}, title = {Beer Inventory Game: Entwicklung und Realisierung eines Planspiels zur Simulation selektiver Lagerhaltungsstrategien im Distributionsnetzwerk}, series = {CBS Working Paper Series}, volume = {3}, journal = {CBS Working Paper Series}, publisher = {Cologne Business School}, address = {K{\"o}ln}, organization = {Cologne Business School}, doi = {10.13140/RG.2.2.31366.88641}, year = {2017}, language = {en} }