TY - CHAP A1 - Rosilius, Maximilian A1 - Wilhelm, Markus A1 - Seitz, Philipp A1 - Von Eitzen, Ingo A1 - Wirsing, Benedikt A1 - Rabenstein, Markus A1 - Decker, Steffen A1 - Bräutigam, Volker T1 - Equalization of the Visibility Loss between AR and Real Stimuli Sizes T2 - 2022 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct) N2 - The results of the empirical study based on an AR Landolt C vision were examined to compare real and virtual visibility as a function of stimulus size on an HMD (e.g. MS HoloLens 2). A counterbalanced within-subject-design study with n = 32 probands was conducted. The results show on one hand a visibility loss between real and immersive systems by the same size of representation. On the other hand, a transfer function can be derived to ensure comparable visibility between the systems. This transfer function can be used to compensate for the visibility loss as a design guideline for immersive applications. In approximation, the Weber-Fechner's relation can be applied on AR visibility versus size of stimuli. Y1 - 2022 UR - https://ieeexplore.ieee.org/iel7/9973799/9974160/09974190.pdf U6 - https://doi.org/https://doi.org/10.1109/ISMAR-Adjunct57072.2022.00178 SP - 821 EP - 826 PB - IEEE ER - TY - CHAP A1 - Rosilius, Maximilian A1 - Wilhelm, Markus A1 - von Eitzen, Ingo A1 - Decker, Steffen A1 - Damek, Sebastian A1 - Bräutigam, Volker T1 - Sustainable Solutions by the Use of Immersive Technologies for Repurposing Buildings T2 - Global Conference on Sustainable Manufacturing N2 - In the context of urban production and sustainable reuse of existing buildings, a detailed planning of the later usage is indispensable. One approach is to enable large-scale AR simulation on site with a sufficient Level of Detail (LoD) and stability. To determine performance metrics, a technology-stack is created and presented that enables a realistic field experiment in an industrial environment (area of 1,314 m2) using Microsoft HoloLens 2. For the experiment, a 3D model was instantiated as often as possible up to the limit of system stability and in different LoDs (100% down to 10%). The result shows that it is feasible to represent 2.63 million polygons (equivalent to about 1,909 m3 of augmented space) on LOD-35%; LoD-100% is equivalent to 327.38 m3 and 1,284 million polygons. Polygonal density [polygons/m3] is introduced as new indicator for better comparability when using 3D models. Thus, it is possible to immersively visualize urban production planning processes in large-scale scenarios. This expands the functional planning space of Urban Production and overcomes previous technical limitations. Y1 - 2022 U6 - https://doi.org/10.1007/978-3-031-28839-5_62 SP - 551 EP - 558 PB - Springer ER - TY - CHAP A1 - Rosilius, Maximilian A1 - Wirsing, Benedikt A1 - von Eitzen, Ingo A1 - Wilhelm, Markus A1 - Schmitt, Jan A1 - Engelmann, Bastian A1 - Bräutigam, Volker T1 - Evaluation of Visual Requirements and Software-Design for Immersive Visibility in Industrial Applications T2 - 2021 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct) N2 - Currently, many sources predict increasing use of AR technology in the industrial environment. The task of immersive productive assistance systems is to provide information contextually to the industrial user. Therefore, it is essential to explore the factors and effects that influence the visibility and the corresponding quality of this information. Caused by the technical limitations of additive display technology and application conditions, this new approach has evaluated the immersive visibility of Landolt Rings in various greyscales against ambient illuminance levels on different industrial-like surfaces, coupled with and without a white virtual background. For this purpose, an empirical study in a within-subjects-design with full factorial experimental design (n=23) was conducted on Microsoft HoloLens 2 hardware. The mean values of the main effects indicate that visibility is significantly affected by ambient illuminance (best results at lower level), greyscale (best results at middle level) and virtual background (best results with background). In contrast, the choice of surface is shown to have no statistically significant effect on visibility, however it affects the response time. Additionally, cross-interactions of variables were analyzed and lead to a design recommendation for immersive industrial applications. Y1 - 2021 UR - https://www.researchgate.net/profile/Rosilius_Maximilian/publication/355896115_Evaluation_of_Visual_Requirements_and_Software-Design_for_Immersive_Visibility_in_Industrial_Applications/links/6189827807be5f31b7591290/Evaluation-of-Visual-Requirements-and-Software-Design-for-Immersive-Visibility-in-Industrial-Applications.pdf SP - 234 EP - 239 ER - TY - JOUR A1 - Fischer, Sophie A1 - Rosilius, Maximilian A1 - Schmitt, Jan A1 - Bräutigam, Volker T1 - A brief review of our agile teaching formats in entrepreneurship education JF - Sustainability N2 - Companies are confronted with increasingly demanding environments, including globalization, technologization, intergenerationality, and crises such as the coronavirus pandemic. To accept uncertainties as a challenge and to recognize opportunities for development, well-educated and resilient founders are needed who can foster innovation and sustainable development within society and the economy. The majority of today’s entrepreneurs have an academic background. Hence, institutions for higher education need to provide comprehensive educational offerings and support initiatives to train and sensitize future entrepreneurs. Therefore, since 2013, agile teaching formats have been developed in our project at a Bavarian university of applied sciences. In two stages, we founded a limited company for hands-on experimentation with entrepreneurship and also conceptualized an elective course and an annual founders’ night. Based on a theoretical model and continuous teaching evaluations, we adjusted the individual modules to suit the target group. The objective is to promote the acquisition of key competencies and exert a positive influence on the startup quotient in the region. There are six startups by students who can be traced back to our project. This indicates that a target-group-oriented educational program encourages motivation and awareness of entrepreneurial thinking and action among students. Y1 - 2022 U6 - https://doi.org/https://doi.org/10.3390/su14010251 VL - 14 IS - 1 SP - 251 EP - 251 ER - TY - JOUR A1 - Wilhelm, Markus A1 - Rosilius, Maximilian A1 - Bräutigam, Volker T1 - PlanAR – Planen mit Augmented Reality (AR) BT - Einsatz von AR bei Anlagenplanung und Materialflussoptimierung JF - FHWS Science Journal N2 - Die Weiterentwicklung von Endgeräten wie z.B. von NReal oder die Microsoft HoloLens 2 im Bereich Augmented Reality (AR) führt zu einem erweiterten Nutzungsfeld von AR außerhalb klassischer Entwicklungs- und »Gaming«-Umgebungen. Eine der sich intensivierenden Nutzungsoptionen ist der wertorientierte Einsatz im industriellen Umfeld. In diesem Bereich bedarf es noch einer weitreichenden Identifizierung und Evaluierung der Einsatzpotenziale und des -nutzens [1]. Naheliegender Vorteil der Technologie ist die Anwendung in integrativen Planungsprozessen z.B. in der Anlagenplanung. Durch die Visualisierung von virtuellen Inhalten in einer realen Umgebung, können zukünftige Veränderungen auf mögliche Störfaktoren bereits vor Umsetzung detailliert geprüft und optimiert werden. Dies führt zu Zeit- und Kostenersparnis in Planungsphasen, da nachträgliche Änderungen signifikant kostenintensiver und komplexer sind. Eine weitere Nutzungsmöglichkeit ist die Simulation von Fertigungsprozessen und deren Auswirkungen. Die Simulation kann insbesondere bei der Identifikation unternehmensunabhängiger Probleme helfen. Auch kann der zeitliche Faktor, der jedem Prozess zugrunde liegt, eingebettet in einem virtuell erweiterten Realszenario geprüft werden. Als Beispiel kann hier die Störungsbeseitigung in industriellen Fertigungsprozessen dienen, welche meistens einer notwendigen engen Taktung unterliegen. Störungen sind häufig durch die direkte Umwelt oder Probleme in Arbeitsabläufen begründet. An diesem Punkt können die möglichen Optimierungsoptionen unter den gegebenen Bedingungen eine erste Validierung erfahren, ohne direkten Eingriff in laufende Prozesse. Diese Anwendungsmöglichkeiten gilt es zu untersuchen und in eine gebrauchstaugliche Lösung für den Einsatz im wertschöpfenden Bereichen zu überführen. Ziel dabei ist es die noch hypothetischen Potenziale zu bewerten und in einsetzbare Applikationen zu transformieren, die den Anforderungen in einer industriellen Umgebung standhalten. Um eine nutzerorientierte Forschung zu gewährleisten, ist es notwendig den Bedarf der Industrie zu erfassen. An diesem Punkt setzt das Vorhaben PlanAR an und untersucht die interdisziplinären Auswirkungen der Anwendungsmöglichkeiten und Applikationen bei industrienahen Nutzungsanforderungen. KW - anlagenplanung KW - augmented reality Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:863-opus-20006 UR - https://nbn-resolving.org/urn:nbn:de:bvb:863-opus-19389 SN - 2196-6095 VL - 5 IS - 2 SP - 125 EP - 130 ER - TY - JOUR A1 - Höfflin, Dennis A1 - Hartmann, Jürgen A1 - Rosilius, Maximilian A1 - Seitz, Philipp A1 - Schiffler, Andreas T1 - Opto-Thermal Investigation of Additively Manufactured Steel Samples as a Function of the Hatch Distance JF - Sensors N2 - Nowadays, additive manufacturing processes are becoming more and more appealing due to their production-oriented design guidelines, especially with regard to topology optimisation and minimal downstream production depth in contrast to conventional technologies. However, a scientific path in the areas of quality assurance, material and microstructural properties, intrinsic thermal permeability and dependent stress parameters inhibits enthusiasm for the potential degrees of freedom of the direct metal laser melting process (DMLS). Especially in quality assurance, post-processing destructive measuring methods are still predominantly necessary in order to evaluate the components adequately. The overall objective of these investigations is to gain process knowledge make reliable in situ statements about component quality and material properties based on the process parameters used and emission values measured. The knowledge will then be used to develop non-destructive tools for the quality management of additively manufactured components. To assess the effectiveness of the research design in relation to the objectives for further investigations, this pre-study evaluates the dependencies between the process parameters, process emission during manufacturing and resulting thermal diffusivity and the relative density of samples fabricated by DMLS. Therefore, the approach deals with additively built metal samples made on an EOS M290 apparatus with varying hatch distances while simultaneously detecting the process emission. Afterwards, the relative density of the samples is determined optically, and thermal diffusivity is measured using the laser flash method. As a result of this pre-study, all interactions of the within factors are presented. The process variable hatch distance indicates a strong influence on the resulting material properties, as an increase in the hatch distance from 0.11 mm to 1 mm leads to a drop in relative density of 57.4%. The associated thermal diffusivity also reveals a sharp decrease from 5.3 mm2/s to 1.3 mm2/s with growing hatch distances. The variability of the material properties can also be observed in the measured process emissions. However, as various factors overlap in the thermal radiation signal, no clear assignment is possible within the scope of this work. KW - additive manufacturing processes KW - material Y1 - 2021 U6 - https://doi.org/10.3390/s22010046 SN - 1424-8220 VL - 22 IS - 1 PB - MDPI ER - TY - JOUR A1 - Maximilian, Rosilius A1 - Spiertz, Martin A1 - Wirsing, Benedikt A1 - Geuen, Manuel A1 - Bräutigam, Volker A1 - Ludwig, Bernd T1 - Impact of Industrial Noise on Speech Interaction Performance and User Acceptance when Using the MS HoloLens 2 JF - Multimodal Technologies and Interaction Y1 - 2024 U6 - https://doi.org/10.3390/mti8020008 VL - 8 ER -