Hochschule für Technik und Umwelt FHNW
Dauerhafte URI für den Bereichhttps://irf.fhnw.ch/handle/11654/35
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Publikation Der "Digital Twin". Das unbekannte Wesen(Swiss Professional Media, 20.08.2021) Krack, Markus; Burri, Simona; Fischer, ManuelDer «Digitale Zwilling» ist in aller Munde. Oft ist jedoch unklar, was genau mit dem Begriff gemeint ist. Prof. Markus C. Krack, am Institut für Business Engineering FHNW verantwortlich für das Forschungsgebiet Smart Factory, und Simona Burri sowie Manuel Fischer, die am selben Institut ihr Masterstudium absolvieren und als wissenschaftliche Assistenten arbeiten, versuchen, den Digitalen Zwilling zu definieren, dessen Aufbau und Einsatzmöglichkeiten zu betrachten und Vorteile und Nutzen aufzuzeigen.01B - Beitrag in Magazin oder ZeitungPublikation Effects of Prism Eyeglasses on Objective and Subjective Fixation Disparity(Public Library of Science, 02.10.2015) Schroth, Volkhard; Joos, Roland; Jaschinski, WolfgangIn optometry of binocular vision, the question may arise whether prisms should be included in eyeglasses to compensate an oculomotor and/or sensory imbalance between the two eyes. The corresponding measures of objective and subjective fixation disparity may be reduced by the prisms, or the adaptability of the binocular vergence system may diminish effects of the prisms over time. This study investigates effects of wearing prisms constantly for about 5 weeks in daily life. Two groups of 12 participants received eyeglasses with prisms having either a base-in direction or a base-out direction with an amount up to 8 prism diopters. Prisms were prescribed based on clinical fixation disparity test plates at 6 m. Two dependent variables were used: (1) subjective fixation disparity was indicated by a perceived offset of dichoptic nonius lines that were superimposed on the fusion stimuli and (2) objective fixation disparity was measured with a video based eye tracker relative to monocular calibration. Stimuli were presented at 6 m and included either central or more peripheral fusion stimuli. Repeated measurements were made without the prisms and with the prisms after about 5 weeks of wearing these prisms. Objective and subjective fixation disparity were correlated, but the type of fusion stimulus and the direction of the required prism may play a role. The prisms did not reduce the fixation disparity to zero, but induced significant changes in fixation disparity with large effect sizes. Participants receiving base-out prisms showed hypothesized effects, which were concurrent in both types of fixation disparity. In participants receiving base-in prisms, the individual effects of subjective and objective effects were negatively correlated: the larger the subjective (sensory) effect, the smaller the objective (motor) effect. This response pattern was related to the vergence adaptability, i.e. the individual fusional vergence reserves.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Smart scheduling recommender system for process-centric production planning in medium sized enterprises (SRS-4-MSE)(03.02.2021) Waldburger, RaoulSRS-4-MSE is focusing on a process-centric scheduling for MSE in the MEM sector by combining process mining and process simulation algorithms in a recommender system to reduce throughput times with the application of a digital twin. In the Swiss mechanical and electrical engineering industries (MEM), usually ERP modules for scheduling processes based on heuristics are applied in the production planning. Reduction of throughput time with smart digital twins in the production allows for an increase regarding flexibility and responsiveness as well as higher delivery readiness (reduced out-of-stock). First analysis results of the PoC performed with an anonymized offline data set indicated a reduction potential of average throughput times of over 50%.06 - PräsentationPublikation Spray, combustion and soot of water-in-fuel (n-dodecane) emulsions in a constant volume combustion chamber; Part II: Effects of low temperature conditions and axygen concentrations(Elsevier, 2019) Wüthrich, Dario; von Rotz, Beat; Herrmann, Kai; Boulouchos, Konstantinos01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Spray, combustion and soot of water-in-fuel (n-dodecane) emulsions investigated in a constant volume combustion chamber part 1: Influence of low water content(Elsevier, 2019) Wüthrich, Dario; von Rotz, Beat; Herrmann, Kai; Boulouchos, Konstantinos01A - Beitrag in wissenschaftlicher Zeitschrift
