TY - CHAP A1 - Pfetsch, Marc E. A1 - Abele, Eberhard A1 - Altherr, Lena A1 - Bölling, Christian A1 - Brötz, Nicolas A1 - Dietrich, Ingo A1 - Gally, Tristan A1 - Geßner, Felix A1 - Groche, Peter A1 - Hoppe, Florian A1 - Kirchner, Eckhard A1 - Kloberdanz, Hermann A1 - Knoll, Maximilian A1 - Kolvenbach, Philip A1 - Kuttich-Meinlschmidt, Anja A1 - Leise, Philipp A1 - Lorenz, Ulf A1 - Matei, Alexander A1 - Molitor, Dirk A. A1 - Niessen, Pia A1 - Pelz, Peter F. A1 - Rexer, Manuel A1 - Schmitt, Andreas A1 - Schmitt, Johann M. A1 - Schulte, Fiona A1 - Ulbrich, Stefan A1 - Weigold, Matthias T1 - Strategies for mastering uncertainty T2 - Mastering uncertainty in mechanical engineering N2 - This chapter describes three general strategies to master uncertainty in technical systems: robustness, flexibility and resilience. It builds on the previous chapters about methods to analyse and identify uncertainty and may rely on the availability of technologies for particular systems, such as active components. Robustness aims for the design of technical systems that are insensitive to anticipated uncertainties. Flexibility increases the ability of a system to work under different situations. Resilience extends this characteristic by requiring a given minimal functional performance, even after disturbances or failure of system components, and it may incorporate recovery. The three strategies are described and discussed in turn. Moreover, they are demonstrated on specific technical systems. Y1 - 2021 SN - 978-3-030-78353-2 U6 - https://doi.org/10.1007/978-3-030-78354-9_6 N1 - Part of the Springer Tracts in Mechanical Engineering book series (STME) SP - 365 EP - 456 PB - Springer CY - Cham ER - TY - JOUR A1 - Olbertz, Klaus T1 - Wichtige arbeitsrechtliche Entwicklungen im Jahr 2020 : Der Jahresrückblick auf alles Wissenswerte im Arbeitsrecht des vergangenen Jahres JF - NWB - Steuer- und Wirtschaftsrecht N2 - Im Anschluss an die arbeitsrechtlichen Jahresübersichten der vergangenen Jahre (NWB 5/2019 S. 266; NWB 8/2020 S. 557) gibt der nachfolgende Beitrag einen Überblick über relevante Entwicklungen im Arbeitsrecht des Jahres 2020. Der erste Teil beschäftigt sich hierbei mit gesetzlichen Änderungen. Neben Regelungen, die auf die COVID-19-Pandemie zurückgeführt werden können, hat der Gesetzgeber auch andere Vorhaben umgesetzt. So wurde u. a. das Arbeitnehmerentsenderecht reformiert. Für Diskussionen sorgt(e) zudem das Gesetzesvorhaben zur Regelung mobiler Arbeit. Im zweiten Teil werden für die Praxis wichtige höchstrichterliche Gerichtsentscheidungen zum Arbeitsrecht erläutert, alphabetisch sortiert von A (wie Antidiskriminierungsrecht) bis U (wie Urlaub). Y1 - 2021 SN - 0028-3460 IS - 10 SP - 703 EP - 715 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Die Flexibilisierung von Arbeitszeit durch den Abruf von Arbeit : Möglichkeiten und Grenzen arbeitsvertraglicher Gestaltung zur Vermeidung von „Leerlaufzeiten“ JF - NWB - Steuer- und Wirtschaftsrecht N2 - Die Arbeitswelt ist im Umbruch. Der Bedarf an flexiblen Arbeitszeitmodellen nimmt stetig zu, wobei die Corona-Pandemie dieses Bedürfnis nochmals verschärft hat. Gerade auch in kleineren und mittleren Unternehmen wächst die Notwendigkeit, den Einsatz der Beschäftigten möglichst bedarfsgerecht zu steuern, also bei guter Auftragslage mehr Arbeitszeit abzurufen und bei ausbleibenden Aufträgen die Arbeitszeit zu reduzieren und somit bezahlte „Leerlaufzeiten“ zu vermeiden. Der Gesetzgeber stellt den Arbeitgebern hierfür das Instrument der sog. Abrufarbeit ( § 12 Teilzeit- und Befristungsgesetz – TzBfG ) zur Verfügung. In dem nachfolgenden Beitrag werden Möglichkeiten und Grenzen der Abrufarbeit skizziert und konkrete arbeitsvertragliche Gestaltungsmöglichkeiten aufgezeigt. Y1 - 2021 SN - 0028-3460 IS - 15 SP - 1055 EP - 1063 ER - TY - JOUR A1 - Olbertz, Klaus T1 - Vertragsgestaltungen bei der Beschäftigung von Rentnern in Unternehmen : (Befristete) Beschäftigungsverhältnisse als sinnvolles Instrument zum Schließen von Personallücken JF - NWB - Steuer- und Wirtschaftsrecht Y1 - 2021 SN - 0028-3460 IS - 25 SP - 1810 EP - 1817 ER - TY - GEN A1 - Olbertz, Klaus T1 - Sozialversicherungspflicht eines Minderheitsgesellschafter-Geschäftsführers einer Familiengesellschaft T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Beschluss des LSG Niedersachsen-Bremen v. 20.12.2018 – L 12 BA 23/18 B ER IS - 3 SP - 48 EP - 48 ER - TY - GEN A1 - Olbertz, Klaus T1 - Kein Anspruch des Arbeitnehmers auf Verzugspauschale bei Lohnverzug des Arbeitgebers T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des BAG v. 25.09.2018 – 8 AZR 26/18 IS - 4 SP - 75 EP - 75 ER - TY - GEN A1 - Olbertz, Klaus T1 - Kirchenmitgliedschaft als Einstellungskriterium T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des BAG v. 25.10.2018 – 8 AZR 501/14 IS - 6 SP - 111 EP - 111 ER - TY - GEN A1 - Olbertz, Klaus T1 - Zuordnung von befristet versetzten Arbeitnehmern zu einem übergehenden Betriebsteil T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des LAG Köln v. 04.12.2018 – 4 Sa 962/17 IS - 7 SP - 132 EP - 132 ER - TY - GEN A1 - Olbertz, Klaus T1 - Keine sachgrundlose Befristung bei acht Jahre zurückliegender Vorbeschäftigung T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Urteil des BAG v. 23.01.2019 – 7 AZR 733/16 IS - 11 SP - 201 EP - 201 ER - TY - GEN A1 - Olbertz, Klaus T1 - Vorlagebeschluss – Kopftuchverbot erneut vor dem EuGH T2 - Gesellschafts- und Wirtschaftsrecht : GWR Y1 - 2019 SN - 1868-1816 N1 - Anmerkung zum Beschluss des BAG v. 30.01.2019 – 10 AZR 299/18 IS - 11 SP - 203 EP - 203 ER - TY - JOUR A1 - Braun, Sebastian A1 - Cheng, Chi-Tsun A1 - Dowey, Steve A1 - Wollert, Jörg T1 - Performance evaluation of skill-based order-assignment in production environments with multi-agent systems JF - IEEE Journal of Emerging and Selected Topics in Industrial Electronics N2 - The fourth industrial revolution introduces disruptive technologies to production environments. One of these technologies are multi-agent systems (MASs), where agents virtualize machines. However, the agent's actual performances in production environments can hardly be estimated as most research has been focusing on isolated projects and specific scenarios. We address this gap by implementing a highly connected and configurable reference model with quantifiable key performance indicators (KPIs) for production scheduling and routing in single-piece workflows. Furthermore, we propose an algorithm to optimize the search of extrema in highly connected distributed systems. The benefits, limits, and drawbacks of MASs and their performances are evaluated extensively by event-based simulations against the introduced model, which acts as a benchmark. Even though the performance of the proposed MAS is, on average, slightly lower than the reference system, the increased flexibility allows it to find new solutions and deliver improved factory-planning outcomes. Our MAS shows an emerging behavior by using flexible production techniques to correct errors and compensate for bottlenecks. This increased flexibility offers substantial improvement potential. The general model in this paper allows the transfer of the results to estimate real systems or other models. KW - cyber-physical production systems KW - event-based simulation KW - multi-agent systems KW - digital factory KW - industrial agents Y1 - 2021 U6 - https://doi.org/10.1109/JESTIE.2021.3108524 SN - 2687-9735 IS - Early Access PB - IEEE CY - New York ER - TY - JOUR A1 - Jahnke, Siegfried A1 - Roussel, Johanna A1 - Hombach, Thomas A1 - Kochs, Johannes A1 - Fischbach, Andreas A1 - Huber, Gregor A1 - Scharr, Hanno T1 - phenoSeeder - A robot system for automated handling and phenotyping of individual seeds JF - Plant physiology N2 - The enormous diversity of seed traits is an intriguing feature and critical for the overwhelming success of higher plants. In particular, seed mass is generally regarded to be key for seedling development but is mostly approximated by using scanning methods delivering only two-dimensional data, often termed seed size. However, three-dimensional traits, such as the volume or mass of single seeds, are very rarely determined in routine measurements. Here, we introduce a device named phenoSeeder, which enables the handling and phenotyping of individual seeds of very different sizes. The system consists of a pick-and-place robot and a modular setup of sensors that can be versatilely extended. Basic biometric traits detected for individual seeds are two-dimensional data from projections, three-dimensional data from volumetric measures, and mass, from which seed density is also calculated. Each seed is tracked by an identifier and, after phenotyping, can be planted, sorted, or individually stored for further evaluation or processing (e.g. in routine seed-to-plant tracking pipelines). By investigating seeds of Arabidopsis (Arabidopsis thaliana), rapeseed (Brassica napus), and barley (Hordeum vulgare), we observed that, even for apparently round-shaped seeds of rapeseed, correlations between the projected area and the mass of seeds were much weaker than between volume and mass. This indicates that simple projections may not deliver good proxies for seed mass. Although throughput is limited, we expect that automated seed phenotyping on a single-seed basis can contribute valuable information for applications in a wide range of wild or crop species, including seed classification, seed sorting, and assessment of seed quality. Y1 - 2016 U6 - https://doi.org/10.1104/pp.16.01122 SN - 0032-0889 VL - 172 IS - 3 SP - 1358 EP - 1370 PB - Oxford University Press CY - Oxford ER - TY - JOUR A1 - Wrede, Oliver T1 - Continuity in travel information JF - Information Design Journal N2 - This article discusses the contrast between the information transportation companies provide to travellers and that of their brand messaging. Companies’ brand messaging often portrays the service they provide as pleasant, stress free and perfect. Customers and users of the service, on the other hand, often describe their experience of the service as a negative one. This article suggests that the brand value would be greater if transportation companies paid more attention to the users’ experience when designing their information systems, particularly in worst case scenarios. Y1 - 2016 U6 - https://doi.org/10.1075/idj.22.2.09wre SN - 0142-5471 N1 - Gedruckt vorhanden in der Bereichsbibliothek Boxgraben unter 53 Z 971-2016 (Magazin) VL - 22 IS - 2 SP - 172 EP - 178 PB - John Benjamins CY - Amsterdam ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Fully Automated Operational Modal Analysis using multi-stage clustering JF - Mechanical Systems and Signal Processing Y1 - 2017 U6 - https://doi.org/10.1016/j.ymssp.2016.07.031 SN - 0888-3270 VL - Vol. 84, Part A SP - 308 EP - 323 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Reger, V. A1 - Döring, Bernd A1 - Kuhnhenne, M. T1 - Passive und aktive Maßnahmen zur Flächenkühlung im Stahl(leicht)bau JF - Bauingenieur N2 - Mit steigenden Dämmstandards und höheren Komfortanforderungen der Nutzer gerät die Problematik der sommerlichen Überhitzung zunehmend in den Fokus. Um die Überhitzung möglichst gering zu halten, sind Maßnahmen und Lösungen zu entwickeln, die den potenziellen Kühlbedarf eines Gebäudes vermeiden sowie reduzieren. Im Rahmen des europäischen Forschungsprojektes BATIMASS wurden Techniken untersucht, die die sommerliche Raumtemperatur ohne zusätzliche Kühlung (passiv) oder aber mit energieeffizienter wasserbasierter Flächenkühlung (aktiv) reduzieren und die besonders für Gebäude in Stahl(leicht)bauweise geeignet sind. Dafür wurde die Methodik der thermisch äquivalenten Decke weiterentwickelt, um das thermische Verhalten von Profilblechdecken in Gebäuden für beide Lösungsansätze analysieren zu können. Darüber hinaus wurde der Einsatz von Phasenwechselmaterial (PCM) zur Steigerung der Speicherfähigkeit von leichten Decken mit besonders geringer thermischer Masse in Simulationen sowie im Labor untersucht und bewertet. Y1 - 2016 U6 - https://doi.org/10.37544/0005-6650-2016-07-08-63 SN - 0005-6650 N1 - gedruckt in der Bereichsbibliothek Bayernallee unter der Signatur 13 Z 049 VL - 91 IS - Jul/Aug SP - 309 EP - 316 PB - VDI Fachmedien CY - Düsseldorf ER - TY - CHAP A1 - Kessler, Julia A1 - Balc, Nicolae A1 - Gebhardt, Andreas A1 - Abbas, Karim T1 - Basic research on lattice structures focused on the reliance of the cross sectional area and additional coatings T2 - The 4th International Conference on Computing and Solutions in Manufacturing Engineering 2016 – CoSME’16 Y1 - 2017 U6 - https://doi.org/10.1051/matecconf/20179403008 N1 - MATEC Web Conf. Vol 94, 2017, 03008 MATEC Web of Conferences 94, 03008 (2017) ET - Vol. 94 ER - TY - BOOK A1 - Lauth, Jakob A1 - Kowalczyk, Jürgen T1 - Thermodynamik : eine Einführung Y1 - 2015 SN - 978-3-662-46228-7 U6 - https://doi.org/10.1007/978-3-662-46229-4 PB - Springer Spektrum CY - Berlin ER - TY - CHAP A1 - Lind, Thorsten Patric T1 - Wirkungen der Eröffnung des Insolvenzverfahrens : §§ 129, 132, 133, 144, 145 T2 - Bankenkommentar zum Insolvenzrecht. - 3. Auflage Y1 - 2016 SN - 978-3-95725-016-2 SP - 1277 EP - 1767 PB - Finanz Colloquium CY - Heidelberg ER - TY - JOUR A1 - Funke, Harald A1 - Keinz, Jan A1 - Kusterer, Karsten A1 - Ayed, Anis Haj A1 - Kazari, Masahide A1 - Kitajima, Junichi A1 - Horikawa, Atsushi A1 - Okada, Kunio T1 - Experimental and Numerical Study on Optimizing the Dry Low NOₓ Micromix Hydrogen Combustion Principle for Industrial Gas Turbine Applications JF - Journal of Thermal Science and Engineering Applications N2 - Combined with the use of renewable energy sources for its production, hydrogen represents a possible alternative gas turbine fuel for future low-emission power generation. Due to the difference in the physical properties of hydrogen compared to other fuels such as natural gas, well-established gas turbine combustion systems cannot be directly applied to dry low NOₓ (DLN) hydrogen combustion. The DLN micromix combustion of hydrogen has been under development for many years, since it has the promise to significantly reduce NOₓ emissions. This combustion principle for air-breathing engines is based on crossflow mixing of air and gaseous hydrogen. Air and hydrogen react in multiple miniaturized diffusion-type flames with an inherent safety against flashback and with low NOₓ emissions due to a very short residence time of the reactants in the flame region. The paper presents an advanced DLN micromix hydrogen application. The experimental and numerical study shows a combustor configuration with a significantly reduced number of enlarged fuel injectors with high-thermal power output at constant energy density. Larger fuel injectors reduce manufacturing costs, are more robust and less sensitive to fuel contamination and blockage in industrial environments. The experimental and numerical results confirm the successful application of high-energy injectors, while the DLN micromix characteristics of the design point, under part-load conditions, and under off-design operation are maintained. Atmospheric test rig data on NOₓ emissions, optical flame-structure, and combustor material temperatures are compared to numerical simulations and show good agreement. The impact of the applied scaling and design laws on the miniaturized micromix flamelets is particularly investigated numerically for the resulting flow field, the flame-structure, and NOₓ formation. Y1 - 2016 U6 - https://doi.org/10.1115/1.4034849 SN - 1948-5093 N1 - TSEA-15-1227 VL - 9 IS - 2 SP - 021001 EP - 021001-10 PB - ASME CY - New York, NY ER - TY - JOUR A1 - Ayed, Anis Haj A1 - Kusterer, Karsten A1 - Funke, Harald A1 - Keinz, Jan T1 - CFD Based Improvement of the DLN Hydrogen Micromix Combustion Technology at Increased Energy Densities JF - American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) N2 - Combined with the use of renewable energy sources for its production, Hydrogen represents a possible alternative gas turbine fuel within future low emission power generation. Due to the large difference in the physical properties of Hydrogen compared to other fuels such as natural gas, well established gas turbine combustion systems cannot be directly applied for Dry Low NOx (DLN) Hydrogen combustion. Thus, the development of DLN combustion technologies is an essential and challenging task for the future of Hydrogen fuelled gas turbines. The DLN Micromix combustion principle for hydrogen fuel has been developed to significantly reduce NOx-emissions. This combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type flames. The major advantages of this combustion principle are the inherent safety against flash-back and the low NOx-emissions due to a very short residence time of reactants in the flame region of the micro-flames. The Micromix Combustion technology has been already proven experimentally and numerically for pure Hydrogen fuel operation at different energy density levels. The aim of the present study is to analyze the influence of different geometry parameter variations on the flame structure and the NOx emission and to identify the most relevant design parameters, aiming to provide a physical understanding of the Micromix flame sensitivity to the burner design and identify further optimization potential of this innovative combustion technology while increasing its energy density and making it mature enough for real gas turbine application. The study reveals great optimization potential of the Micromix Combustion technology with respect to the DLN characteristics and gives insight into the impact of geometry modifications on flame structure and NOx emission. This allows to further increase the energy density of the Micromix burners and to integrate this technology in industrial gas turbines. Y1 - 2016 SN - 2313-4402 VL - 26 IS - 3 SP - 290 EP - 303 PB - GSSRR ER -