@article{HeuermannSchiek1992,
  author    = {Heuermann, Holger and Schiek, Burkhard},
  title     = {A Fast and Robust Procedure for the Determination of the Scattering Parameters for Network Analyzer Calibration},
  address   = {Paris},
  pages     = {373 -- 374},
  year      = {1992},
  language  = {en}
}
@article{FerreinFritzLakemeyer2004,
  author    = {Ferrein, Alexander and Fritz, Christian and Lakemeyer, Gerhard},
  title     = {On-Line Decision-Theoretic Golog for Unpredictable Domains / Ferrein, Alexander ; Fritz, Christian ; Lakemeyer, Gerhard},
  series = {KI 2004: Advances in Artificial Intelligence : 27th Annual German Conference on AI, KI 2004, Ulm, Germany, September 20-24, 2004. Proceedings},
  journal   = {KI 2004: Advances in Artificial Intelligence : 27th Annual German Conference on AI, KI 2004, Ulm, Germany, September 20-24, 2004. Proceedings},
  publisher = {Springer},
  address   = {Berlin},
  pages     = {322 -- 336},
  year      = {2004},
  language  = {en}
}
@article{HeuermannHillebrandSadeghfam2008,
  author    = {Heuermann, Holger and Hillebrand, J{\"u}rgen and Sadeghfam, Arash},
  title     = {Novel Concept of a Digital SigmaDelta-PLL-Phase-Shift-Modulator / Hillebrand, J{\"u}rgen ; Sadeghfam, Arash ; Heuermann, Holger},
  isbn      = {978-3-8007-3086-5},
  pages     = {123 -- 126},
  year      = {2008},
  language  = {en}
}
@article{FerreinSteinbauerMcPhillipsetal.2007,
  author    = {Ferrein, Alexander and Steinbauer, Gerald and McPhillips, Graeme and Potgieter, Anet},
  title     = {Establishing the RoboCup Standard League in Africa - applying for the RoboCup Standard League with a German-Austrian-South African Research Project},
  pages     = {1 -- 5},
  year      = {2007},
  language  = {en}
}
@article{HeuermannSchiek1992,
  author    = {Heuermann, Holger and Schiek, Burkhard},
  title     = {LNN (Line-Network-Network): Verfahren zur Kalibrierung von Netzwerkanalysatoren},
  series = {Kleinheubacher Berichte : Vortr{\"a}ge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 36. 1992 (1992)},
  journal   = {Kleinheubacher Berichte : Vortr{\"a}ge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 36. 1992 (1992)},
  pages     = {327 -- 335},
  year      = {1992},
  language  = {en}
}
@article{RitzEllerweg2008,
  author    = {Ritz, Thomas and Ellerweg, Roland},
  title     = {Benutzerzentrierte Entwicklung mobiler Unternehmenssoftware, Teil 2 : die Iterative Entwicklung},
  series = {dot.net-magazin},
  volume    = {2008},
  journal   = {dot.net-magazin},
  number    = {12},
  issn      = {1619-7933},
  year      = {2008},
  language  = {de}
}
@article{FerreinFritzLakemeyer2005,
  author    = {Ferrein, Alexander and Fritz, Christian and Lakemeyer, Gerhard},
  title     = {Using Golog for Deliberation and Team Coordination in Robotic Soccer / Ferrein, Alexander ; Fritz, Christian ; Lakemeyer, Gerhard},
  series = {K{\"u}nstliche Intelligenz : KI. 19 (2005), H. 1},
  journal   = {K{\"u}nstliche Intelligenz : KI. 19 (2005), H. 1},
  isbn      = {0933-1875},
  pages     = {24 -- 30},
  year      = {2005},
  language  = {en}
}
@article{SchifferFerrein2018,
  author    = {Schiffer, Stefan and Ferrein, Alexander},
  title     = {ERIKA—Early Robotics Introduction at Kindergarten Age},
  series = {Multimodal Technologies Interact},
  volume    = {2},
  journal   = {Multimodal Technologies Interact},
  number    = {4},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {2414-4088},
  doi       = {10.3390/mti2040064},
  pages     = {15},
  year      = {2018},
  abstract  = {In this work, we report on our attempt to design and implement an early introduction to basic robotics principles for children at kindergarten age. One of the main challenges of this effort is to explain complex robotics contents in a way that pre-school children could follow the basic principles and ideas using examples from their world of experience. What sets apart our effort from other work is that part of the lecturing is actually done by a robot itself and that a quiz at the end of the lesson is done using robots as well. The humanoid robot Pepper from Softbank, which is a great platform for human-robot interaction experiments, was used to present a lecture on robotics by reading out the contents to the children making use of its speech synthesis capability. A quiz in a Runaround-game-show style after the lecture activated the children to recap the contents they acquired about how mobile robots work in principle. In this quiz, two LEGO Mindstorm EV3 robots were used to implement a strongly interactive scenario. Besides the thrill of being exposed to a mobile robot that would also react to the children, they were very excited and at the same time very concentrated. We got very positive feedback from the children as well as from their educators. To the best of our knowledge, this is one of only few attempts to use a robot like Pepper not as a tele-teaching tool, but as the teacher itself in order to engage pre-school children with complex robotics contents.},
  language  = {en}
}
@article{HoltrupSadeghfamHeuermannetal.2014,
  author    = {Holtrup, S. and Sadeghfam, Arash and Heuermann, Holger and Awakowicz, P.},
  title     = {Characterization and optimization technique for microwave-driven high-intensity discharge lamps using hot S-parameters},
  series = {IEEE transactions on microwave theories and techniques},
  volume    = {62},
  journal   = {IEEE transactions on microwave theories and techniques},
  number    = {10},
  publisher = {IEEE},
  address   = {New York},
  issn      = {0018-9480},
  doi       = {10.1109/TMTT.2014.2342652},
  pages     = {2471 -- 2480},
  year      = {2014},
  abstract  = {High-intensity discharge lamps can be driven by radio-frequency signals in the ISM frequency band at 2.45 GHz, using a matching network to transform the impedance of the plasma to the source impedance. To achieve an optimal operating condition, a good characterization of the lamp in terms of radio frequency equivalent circuits under operating conditions is necessary, enabling the design of an efficient matching network. This paper presents the characterization technique for such lamps and presents the design of the required matching network. For the characterization, a high-intensity discharge lamp was driven by a monofrequent large signal at 2.45 GHz, whereas a frequency sweep over 300 MHz was performed across this signal to measure so-called small-signal hot S-parameters using a vector network analyzer. These parameters are then used as an equivalent load in a circuit simulator to design an appropriate matching network. Using the measured data as a black-box model in the simulation results in a quick and efficient method to simulate and design efficient matching networks in spite of the complex plasma behavior. Furthermore, photometric analysis of high-intensity discharge lamps are carried out, comparing microwave operation to conventional operation.},
  language  = {en}
}
@article{Ritz2002,
  author    = {Ritz, Thomas},
  title     = {Mass Customized Production of Information Services - The combination of economies-of-scale with economies-of-scope},
  series = {Media firms : structures, operations, and performance ; [World Media Economics Conference, 5th : 2002 : Turku, Finland] / ed. by Robert G. Picard},
  journal   = {Media firms : structures, operations, and performance ; [World Media Economics Conference, 5th : 2002 : Turku, Finland] / ed. by Robert G. Picard},
  publisher = {Erlbaum},
  address   = {Mahwah, NJ [u.a.]},
  isbn      = {0-8058-4165-2},
  pages     = {267 S. : graph. Darst.},
  year      = {2002},
  language  = {en}
}