@article{Wollert1999, author = {Wollert, J{\"o}rg}, title = {Schlaue Produktion von smarten Autos : hinter der Smart-Produktion steckt ein innovatives Logistikkonzept}, series = {Technica}, volume = {Bd. 48}, journal = {Technica}, number = {H. 4}, issn = {0040-866X}, pages = {20 -- 23}, year = {1999}, language = {de} } @article{HeptnerWollert2005, author = {Heptner, K. and Wollert, J{\"o}rg}, title = {FML-Report - VDI-Richtlinie 4485 'E-Commerce und Logistik'}, series = {Logistik f{\"u}r Unternehmen : das Fachmagazin der internen und externen Logistik}, volume = {19}, journal = {Logistik f{\"u}r Unternehmen : das Fachmagazin der internen und externen Logistik}, issn = {0930-7834}, pages = {58 -- 59}, year = {2005}, language = {de} } @article{Wollert2005, author = {Wollert, J{\"o}rg}, title = {Softwaretrends in der Automatisierungstechnik}, series = {Etz : Elektrotechnik \& Automation ; Organ des VDE Verband der Elektrotechnik Elektronik Informationstechnik e.V. und der Energietechnischen Gesellschaft im VDE (ETG) und der VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA)}, volume = {126}, journal = {Etz : Elektrotechnik \& Automation ; Organ des VDE Verband der Elektrotechnik Elektronik Informationstechnik e.V. und der Energietechnischen Gesellschaft im VDE (ETG) und der VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA)}, number = {S2}, issn = {0948-7387}, pages = {74 -- 79}, year = {2005}, language = {de} } @article{Wollert2005, author = {Wollert, J{\"o}rg}, title = {Die n{\"a}chste "Generation Wireless" : Kommunikation mit hoher Bandbreite wird mobil}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, number = {H. 2}, issn = {0013-5658 ; 1611-5120}, pages = {40 -- 44}, year = {2005}, language = {de} } @article{Wollert2007, author = {Wollert, J{\"o}rg}, title = {UWB, ZigBee und Z-Wave in der Automatisierung : neue Konkurrenzsituation bei Short Range Wireless?}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 56}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 2}, issn = {0013-5658}, pages = {62 -- 65}, year = {2007}, language = {de} } @article{WollertKruseVedral2007, author = {Wollert, J{\"o}rg and Kruse, Thomas and Vedral, Andreas}, title = {Die Kraft der drei Antennen : zuverl{\"a}ssige Funkkommunikation f{\"u}r die Automatisierungstechnik}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, volume = {56}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, number = {Sonderh. 2}, issn = {0013-5658; 1611-5120}, pages = {36 -- 42}, year = {2007}, language = {de} } @article{Wollert2007, author = {Wollert, J{\"o}rg}, title = {Funk f{\"u}r die Sicherheit auf vier R{\"a}dern : Chancen und Herausforderungen in der Fahrzeug-Umwelt-Kommunikation}, series = {Elektronik automotive : Magazin f{\"u}r Entwicklungen in der Kfz-Elektronik und Telematik}, journal = {Elektronik automotive : Magazin f{\"u}r Entwicklungen in der Kfz-Elektronik und Telematik}, number = {H. 8}, issn = {1614-0125}, pages = {78 -- 83}, year = {2007}, language = {de} } @article{Wollert2002, author = {Wollert, J{\"o}rg}, title = {Bluetooth im Automobil : derzeitiger Stand der Technik - und was danach kommt}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Elektronik automotive : Magazin f{\"u}r Entwicklungen in der Kfz-Elektronik und Telematik}, volume = {Bd. 51}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Elektronik automotive : Magazin f{\"u}r Entwicklungen in der Kfz-Elektronik und Telematik}, number = {Sonderh. Sept.}, issn = {0013-5658}, pages = {60 -- 63}, year = {2002}, language = {de} } @article{Wollert2002, author = {Wollert, J{\"o}rg}, title = {Vierzig Jahre Software-Desaster : zehn Regeln als R{\"u}stzeug, um die Herausforderung Software-Entwicklung zu meistern}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 51}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 25}, issn = {0013-5658}, pages = {110 -- 115}, year = {2002}, language = {de} } @article{Wollert2003, author = {Wollert, J{\"o}rg}, title = {Dot net und Sun ONE - Wettbewerb oder Mitspieler? Neue Programmiermodelle machen das Web interaktiv}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 52}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 19}, issn = {0013-5658}, pages = {72 -- 81}, year = {2003}, language = {de} } @article{WollertVedralGrimmetal.2004, author = {Wollert, J{\"o}rg and Vedral, Andreas and Grimm, A. and Holtmann, M.}, title = {Bluetooth-Sicherheit : wie viel Pers{\"o}nlichkeit gebe ich preis?}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, volume = {Bd. 53}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, number = {Sonderh. M{\"a}rz}, issn = {0013-5658}, pages = {30 -- 35}, year = {2004}, language = {de} } @article{Wollert2004, author = {Wollert, J{\"o}rg}, title = {Bluetooth, WLAN and ZigBee f{\"u}r die Automatisierungstechnik}, series = {Etz : Elektrotechnik \& Automation}, volume = {Bd. 125}, journal = {Etz : Elektrotechnik \& Automation}, number = {H. 6}, issn = {0948-7387}, pages = {10 -- 18}, year = {2004}, language = {de} } @article{Wollert2004, author = {Wollert, J{\"o}rg}, title = {Bluetooth in der Automatisierung : kabelfrei in eine bessere Zukunft}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 53}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 14}, issn = {0013-5658}, pages = {42 -- 46}, year = {2004}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 1: Die Technik auf einen Blick}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 17}, issn = {0013-5658}, pages = {80 -- 84}, year = {2001}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 2: Die M{\"o}glichkeiten der Bluetooth-Technik}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 18}, issn = {0013-5658}, pages = {68 -- 74}, year = {2001}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 3: Rund um den Bluetooth-Protokollstack}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 19}, issn = {0013-5658}, pages = {96 -- 103}, year = {2001}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 5: Die Bluetooth-Host-Schnittstelle}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 22}, issn = {0013-5658}, pages = {60 -- 65}, year = {2001}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 6: Die Bluetooth-Host-Software}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 23}, issn = {0013-5658}, pages = {50 -- 57}, year = {2001}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 7: Angepasste Protokolle}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 24}, issn = {0013-5658}, pages = {66 -- 72}, year = {2001}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 8: Anwendungs-Profile}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 25}, issn = {0013-5658}, pages = {66 -- 73}, year = {2001}, language = {de} } @article{Wollert2002, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 9: Bluetooth-Systementwicklung}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 51}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 1}, issn = {0013-5658}, pages = {58 -- 63}, year = {2002}, language = {de} } @article{Wollert2002, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 10: Alternative Technologien}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 51}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 2}, issn = {0013-5658}, pages = {50 -- 56}, year = {2002}, language = {de} } @article{WollertVedral2002, author = {Wollert, J{\"o}rg and Vedral, Andreas}, title = {Einsatz von Open-Source-Software f{\"u}r Bluetooth-Evaluationsprototypen : Anwendungsempfehlungen und Einsatzbeispiele}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Bd. 51}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {H. 22}, issn = {0013-5658}, pages = {70 -- 73}, year = {2002}, language = {de} } @article{HuberStreblowMuelleretal.2014, author = {Huber, M. and Streblow, R. and M{\"u}ller, D. and Lange, S. and Joneleit, R. and Sefker, T. and Rau, Sebastian and Wollert, J{\"o}rg}, title = {Funksignal{\"u}bertragung in Luftleitungen}, series = {HLH : L{\"u}ftung, Klima, Heizung, Sanit{\"a}r, Geb{\"a}udetechnik}, volume = {Bd. 65}, journal = {HLH : L{\"u}ftung, Klima, Heizung, Sanit{\"a}r, Geb{\"a}udetechnik}, number = {H. 7/8}, issn = {1436-5103}, pages = {36 -- 40}, year = {2014}, language = {de} } @article{Wollert1995, author = {Wollert, J{\"o}rg}, title = {Zeitsprung : Grundlagen und Markt{\"u}bersicht zu Echtzeit-Betriebssystemen}, series = {ELRAD : Magazin f{\"u}r Elektronik und technische Rechneranwendungen}, journal = {ELRAD : Magazin f{\"u}r Elektronik und technische Rechneranwendungen}, number = {H. 6}, issn = {0170-1827}, pages = {48 -- 59}, year = {1995}, language = {de} } @article{WollertFiedlerStockmann1994, author = {Wollert, J{\"o}rg and Fiedler, J. and Stockmann, T.}, title = {Automatisieren mit dem PC : was der Personal Computer kann und wo er passen muss}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {Nr. 6}, issn = {0013-5658}, pages = {76 -- 82}, year = {1994}, language = {de} } @article{Wollert1995, author = {Wollert, J{\"o}rg}, title = {Euros - 166 - Echtzeitentwicklungskit f{\"u}r den 80C166}, series = {ELRAD : Magazin f{\"u}r Elektronik und technische Rechneranwendungen}, journal = {ELRAD : Magazin f{\"u}r Elektronik und technische Rechneranwendungen}, number = {H. 8}, issn = {0170-1827}, pages = {32 -- 34}, year = {1995}, language = {de} } @article{Wollert2001, author = {Wollert, J{\"o}rg}, title = {Bluetooth aktuell - Technik und Anwendungen ; 4: Der Bluetooth Protokoll-Stack}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, volume = {Jg. 50}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler}, number = {Nr. 20}, issn = {0013-5658}, pages = {76 -- 81}, year = {2001}, language = {de} } @article{BarthWollert1998, author = {Barth, Heiko and Wollert, J{\"o}rg}, title = {SMARTes Konzept - von Produkt zur Fabrik}, series = {Facility-Management : Integration, Planung, Geb{\"a}udemanagement}, volume = {Bd. 4}, journal = {Facility-Management : Integration, Planung, Geb{\"a}udemanagement}, number = {H. August}, issn = {0948-0048}, pages = {30 -- 35}, year = {1998}, language = {de} } @article{Wollert1997, author = {Wollert, J{\"o}rg}, title = {Wieviel Echtzeit kann Windows?}, series = {IEE : elektrische Automatisierung und Antriebstechnik}, volume = {Jg. 42}, journal = {IEE : elektrische Automatisierung und Antriebstechnik}, number = {Nr. 9}, issn = {1434-2898}, pages = {30 -- 37}, year = {1997}, language = {de} } @article{Wollert1996, author = {Wollert, J{\"o}rg}, title = {Zeitgem{\"a}ß : Echtzeit-Zusatz f{\"u}r Windows 3.11 und Windows 95}, series = {ELRAD : Magazin f{\"u}r Elektronik und technische Rechneranwendungen}, journal = {ELRAD : Magazin f{\"u}r Elektronik und technische Rechneranwendungen}, number = {H. 9}, issn = {0170-1827}, pages = {96 -- 99}, year = {1996}, language = {de} } @article{Wollert2008, author = {Wollert, J{\"o}rg}, title = {Bluetooth in der Klemme}, series = {Computer \& Automation : Fachmedium der Automatisierungstechnik}, journal = {Computer \& Automation : Fachmedium der Automatisierungstechnik}, number = {H. 10}, issn = {1615-8512}, pages = {62 -- 67}, year = {2008}, language = {de} } @article{Wollert2009, author = {Wollert, J{\"o}rg}, title = {Funk-Suche : Lokalisierung und Ortsbestimmungs-Verfahren f{\"u}r mobile Systeme}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, number = {H. 2}, publisher = {Weka Fachmedien GmbH}, address = {Haar}, pages = {24 -- 27}, year = {2009}, language = {de} } @article{Wollert2008, author = {Wollert, J{\"o}rg}, title = {Bluetooth: Funk f{\"u}r alle(s)? : 10 Jahre Bluetooth: ein Technologie-{\"U}ber- und -Ausblick}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme}, number = {Okt.}, pages = {36 -- 43}, year = {2008}, language = {de} } @article{Wollert2007, author = {Wollert, J{\"o}rg}, title = {Wireless in industriellen Anwendungen}, series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Scout : Leitfaden f{\"u}r Elektronik-Entwickler}, journal = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Scout : Leitfaden f{\"u}r Elektronik-Entwickler}, issn = {1863-3420}, pages = {40 -- 46}, year = {2007}, language = {de} } @article{FateriGebhardt2015, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Additive manufactured mechanical disentanglement lock}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {12}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, publisher = {Fachhochschule Aachen}, address = {Aachen}, issn = {1614-0923}, url = {http://nbn-resolving.de/urn:nbn:de:0009-2-42147}, year = {2015}, language = {en} } @article{Wollert2015, author = {Wollert, J{\"o}rg}, title = {IO-Link - f{\"u}r smarte Sensoren}, series = {elektroniknet.de}, journal = {elektroniknet.de}, year = {2015}, language = {de} } @article{Wollert2015, author = {Wollert, J{\"o}rg}, title = {Echtzeit-Ethernet : Protokoll-Reigen}, series = {elektroniknet.de}, journal = {elektroniknet.de}, year = {2015}, language = {de} } @article{KesslerBalcGebhardtetal.2015, author = {Kessler, Julia and Balc, Nicolae and Gebhardt, Andreas and Abbas, Karim}, title = {Basic Research on Lattice Structures Focused on the Tensile Strength}, series = {Applied Mechanics and Materials}, volume = {Vol. 808}, journal = {Applied Mechanics and Materials}, publisher = {Trans Tech Publications}, address = {B{\"a}ch}, issn = {1662-7482}, doi = {10.4028/www.scientific.net/AMM.808.193}, pages = {193 -- 198}, year = {2015}, language = {en} } @article{Pfaff2015, author = {Pfaff, Raphael}, title = {Praxisnahe Ausbildung im Fach Schienenfahrzeugtechnik}, series = {Deine Bahn}, journal = {Deine Bahn}, number = {8}, publisher = {Eisenbahn-Fachverlag}, address = {Mainz}, issn = {0172-4479}, pages = {52 -- 55}, year = {2015}, language = {de} } @article{PfaffSchmidtPinders2015, author = {Pfaff, Raphael and Schmidt, Bernd and Pinders, Udo}, title = {Energieeffizienz steigern durch Rekuperationseinrichtungen}, series = {Deine Bahn}, journal = {Deine Bahn}, number = {5}, publisher = {Eisenbahn-Fachverlag}, address = {Mainz}, issn = {0172-4479}, pages = {50 -- 53}, year = {2015}, language = {de} } @article{Gebhardt2015, author = {Gebhardt, Andreas}, title = {3D-Druck ist {\"u}berall. Modische Accessoires, Kleidung, Medikamente, Nahrungsmittel, Autos, H{\"a}user, Waffen, B{\"u}sten, Musikinstrumente - alles geht}, series = {Kunststoffe}, volume = {105}, journal = {Kunststoffe}, number = {10}, publisher = {Hanser}, address = {M{\"u}nchen}, issn = {0023-5563}, pages = {62 -- 70}, year = {2015}, language = {de} } @article{Wollert2016, author = {Wollert, J{\"o}rg}, title = {Rapid Application Development}, series = {Design \& Elektronik}, journal = {Design \& Elektronik}, number = {4}, publisher = {WEKA-Fachmedien}, address = {M{\"u}nchen}, issn = {0933-8667}, pages = {8 -- 11}, year = {2016}, abstract = {Das IoT ist ohne eingebettete Systeme undenkbar. Erst kleine und kleinste Mikrocontroller mit intelligenten Kommunikationsschnittstellen und Anbindung ans Internet erm{\"o}glichen sinnvolles und fl{\"a}chendeckendes Einsammeln von Daten. Doch wie kompliziert ist der Einstieg in die Embedded-Welt? Dieser Artikel gibt Einblick, wie die »Arduino-Plattform« die Einstiegsh{\"u}rden f{\"u}r eingebettete Systeme dramatisch reduzieren kann.}, language = {de} } @article{Wollert2016, author = {Wollert, J{\"o}rg}, title = {Industrial Internet of Things : Seifenblase oder Revolution}, series = {Elektronik}, journal = {Elektronik}, number = {7}, publisher = {WEKA-Fachmedien}, address = {M{\"u}nchen}, issn = {0013-5658}, pages = {39 -- 45}, year = {2016}, language = {de} } @article{KosterScheidweilerTieves2016, author = {Koster, Arie and Scheidweiler, Robert and Tieves, Martin}, title = {A flow based pruning scheme for enumerative equitable coloring algorithms}, series = {A flow based pruning scheme for enumerative equitable coloring algorithms}, journal = {A flow based pruning scheme for enumerative equitable coloring algorithms}, doi = {10.48550/arXiv.1607.08754}, pages = {1 -- 30}, year = {2016}, abstract = {An equitable graph coloring is a proper vertex coloring of a graph G where the sizes of the color classes differ by at most one. The equitable chromatic number is the smallest number k such that G admits such equitable k-coloring. We focus on enumerative algorithms for the computation of the equitable coloring number and propose a general scheme to derive pruning rules for them: We show how the extendability of a partial coloring into an equitable coloring can be modeled via network flows. Thus, we obtain pruning rules which can be checked via flow algorithms. Computational experiments show that the search tree of enumerative algorithms can be significantly reduced in size by these rules and, in most instances, such naive approach even yields a faster algorithm. Moreover, the stability, i.e., the number of solved instances within a given time limit, is greatly improved. Since the execution of flow algorithms at each node of a search tree is time consuming, we derive arithmetic pruning rules (generalized Hall-conditions) from the network model. Adding these rules to an enumerative algorithm yields an even larger runtime improvement.}, language = {en} } @article{BeckenbachScheidweiler2016, author = {Beckenbach, Isabel and Scheidweiler, Robert}, title = {Perfect ƒ-Matchings and ƒ-Factors in Hypergraphs - A Combinatorial Approach}, series = {Discrete Mathematics}, volume = {240}, journal = {Discrete Mathematics}, number = {10}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2192-7782}, doi = {10.1016/j.disc.2017.05.005}, pages = {2499 -- 2506}, year = {2016}, abstract = {We prove characterizations of the existence of perfect ƒ-matchings in uniform mengerian and perfect hypergraphs. Moreover, we investigate the ƒ-factor problem in balanced hypergraphs. For uniform balanced hypergraphs we prove two existence theorems with purely combinatorial arguments, whereas for non-uniform balanced hypergraphs we show that the ƒ-factor problem is NP-hard.}, language = {en} } @article{ScheidweilerTriesch2016, author = {Scheidweiler, Robert and Triesch, Eberhard}, title = {A note on the duality between matchings and vertex covers in balanced hypergraphs}, series = {Journal of Combinatorial Optimization}, volume = {32}, journal = {Journal of Combinatorial Optimization}, number = {2}, publisher = {Springer}, address = {Berlin}, issn = {1573-2886}, doi = {10.1007/s10878-015-9887-5}, pages = {639 -- 644}, year = {2016}, abstract = {We present a new Min-Max theorem for an optimization problem closely connected to matchings and vertex covers in balanced hypergraphs. The result generalizes Kőnig's Theorem (Berge and Las Vergnas in Ann N Y Acad Sci 175:32-40, 1970; Fulkerson et al. in Math Progr Study 1:120-132, 1974) and Hall's Theorem (Conforti et al. in Combinatorica 16:325-329, 1996) for balanced hypergraphs.}, language = {en} } @article{KilicRaatschenKoerfgenetal.2017, author = {Kilic, S. A. and Raatschen, Hans-J{\"u}rgen and K{\"o}rfgen, B. and Apaydin, N. M. and Astaneh-Asl, A.}, title = {FE Model of the Fatih Sultan Mehmet Suspension Bridge Using Thin Shell Finite Elements}, series = {Arabian Journal for Science and Engineering}, volume = {42}, journal = {Arabian Journal for Science and Engineering}, number = {3}, publisher = {Springer Nature}, issn = {2191-4281}, doi = {10.1007/s13369-016-2316-y}, pages = {1103 -- 1116}, year = {2017}, abstract = {This paper presents the results of an eigenvalue analysis of the Fatih Sultan Mehmet Bridge. A high-resolution finite element model was created directly from the available design documents. All physical properties of the structural components were included in detail, so no calibration to the measured data was necessary. The deck and towers were modeled with shell elements. A nonlinear static analysis was performed before the eigenvalue calculation. The calculated natural frequencies and corresponding mode shapes showed good agreement with the available measured ambient vibration data. The calculation of the effective modal mass showed that nine modes had single contributions higher than 5 \% of the total mass. They were in a frequency range up to 1.2 Hz. The comparison of the results for the torsional modes especially demonstrated the advantage of using thin shell finite elements over the beam modeling approach.}, language = {en} } @article{RieperGebhardtStucker2016, author = {Rieper, Harald and Gebhardt, Andreas and Stucker, Brent}, title = {Selective Laser Melting of the Eutectic Silver-Copper Alloy Ag 28 wt \% Cu}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {13}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, issn = {1614-0923}, url = {http://nbn-resolving.de/nbn:de:0009-2-44141}, year = {2016}, abstract = {The aim of this work was to perform a detailed investigation of the use of Selective Laser Melting (SLM) technology to process eutectic silver-copper alloy Ag 28 wt. \% Cu (also called AgCu28). The processing occurred with a Realizer SLM 50 desktop machine. The powder analysis (SEM-topography, EDX, particle distribution) was reported as well as the absorption rates for the near-infrared (NIR) spectrum. Microscope imaging showed the surface topography of the manufactured parts. Furthermore, microsections were conducted for the analysis of porosity. The Design of Experiments approach used the response surface method in order to model the statistical relationship between laser power, spot distance and pulse time.}, language = {en} } @article{HaagZontarSchleupenetal.2014, author = {Haag, S. and Zontar, D. and Schleupen, Josef and M{\"u}ller, T. and Brecher, C.}, title = {Chain of refined perception in self-optimizing assembly of micro-optical systems}, series = {Journal of sensors and sensor systems}, volume = {3}, journal = {Journal of sensors and sensor systems}, number = {1}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, issn = {2194-878X}, doi = {10.5194/jsss-3-87-2014}, pages = {87 -- 95}, year = {2014}, abstract = {Today, the assembly of laser systems requires a large share of manual operations due to its complexity regarding the optimal alignment of optics. Although the feasibility of automated alignment of laser optics has been shown in research labs, the development effort for the automation of assembly does not meet economic requirements - especially for low-volume laser production. This paper presents a model-based and sensor-integrated assembly execution approach for flexible assembly cells consisting of a macro-positioner covering a large workspace and a compact micromanipulator with camera attached to the positioner. In order to make full use of available models from computer-aided design (CAD) and optical simulation, sensor systems at different levels of accuracy are used for matching perceived information with model data. This approach is named "chain of refined perception", and it allows for automated planning of complex assembly tasks along all major phases of assembly such as collision-free path planning, part feeding, and active and passive alignment. The focus of the paper is put on the in-process image-based metrology and information extraction used for identifying and calibrating local coordinate systems as well as the exploitation of that information for a part feeding process for micro-optics. Results will be presented regarding the processes of automated calibration of the robot camera as well as the local coordinate systems of part feeding area and robot base.}, language = {en} }