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Die Bachs sind die größte Musiker-Dynastie aller Zeiten. Die Wurzeln dieser berühmten Familie und ihre musikalischen Anfänge liegen im Gothaer Land. Hier spielte am Anfang des 17. Jahrhunderts der Wechmarer Müller Vitus Bach auf dem Cythringen und wurde zum Stammvater des musikalischen Bachgeschlechts. Seine Söhne und Enkel zogen musizierend durch das Land und machten sich überall in Thüringen einen Namen als begnadete Musiker. Über Generationen hinweg schallte der Ruf der Bachs in die Welt, blieb aber auch weiterhin unmittelbar mit dem Gothaer Land verbunden. Johann Sebastian Bach erlernte in Ohrdruf das Orgelspiel und brachte Ostern 1717 in der Gothaer Schlosskirche seine erste Passion zur Aufführung. Aber auch abseits des wohl weltweit bekanntesten Bachs waren über zwei Jahrhunderte hindurch zahlreiche Mitglieder der Familie in diesem Raum als Kantoren, Organisten, Lehrer und Geistliche tätig. Der Band widmet sich in 22 Beiträgen dem Leben und Wirken dieser musikalischen Großfamilie und gibt zugleich Einblicke in das Bach-Erbe und die Bach-Traditionen des Gothaer Landes.
Liquid deposition modeling is an energy-efficient, additive manufacturing process for pasty materials. Physical material properties were determined for a water-based paste consisting of the binder carboxymethyl cellulose and wood flour. A continuously operating dual screw extruder was developed, which was used to manufacture a table frame with a height of 18 cm.
Based on a real-world application in the semiconductor industry, this article models and discusses a hybrid flow shop problem with time dependencies and priority constraints. The analyzed problem considers a production where a large number of heterogeneous jobs are processed by a number of machines. The route that each job has to follow depends upon its type, and, in addition, some machines require that a number of jobs are combined in batches before starting their processing. The hybrid flow model is also subject to a global priority rule and a “same setup” rule. The primary goal of this study was to find a solution set (permutation of jobs) that minimizes the production makespan. While simulation models are frequently employed to model these time-dependent flow shop systems, an optimization component is needed in order to generate high-quality solution sets. In this study, a novel algorithm is proposed to deal with the complexity of the underlying system. Our algorithm combines biased-randomization techniques with a discrete-event heuristic, which allows us to model dependencies caused by batching and different paths of jobs efficiently in a near-natural way. As shown in a series of numerical experiments, the proposed simulation-optimization algorithm can find solutions that significantly outperform those provided by employing state-of-the-art simulation software.
A novel approach to consider triaxial tensile stresses within the framework of a failure criterion
(2022)
For use in micromechanical simulations of continuous fiber reinforced polymers, a more general form of the paraboloid failure criterion by Stassi‐D'Alia for matrix failure was developed with explicit consideration of the hydrostatic tension strength. Regarding polymers, limits for hydrostatic tensile strength based on isotropic linear elasticity could be derived. The comparison of the newly developed extended paraboloid criterion with experimental data for yielding as well as for material separation (fracture) shows good agreement.
The purpose of this article is to revise the literature on how theories have been utilized in investigating third-parties (for example, Non-Governmental Organizations, certifying organizations, among others) in Sustainable Supply Chain Management. Based on that, we derive future research directions. For revising the literature in a structured manner, the articles use the systematic literature review as the method of choice. Only half of the identified articles utilize theories for investigating third-parties in Sustainable Supply Chain Management. In addition, major theories are overweighed. This predomination leads to influencing the conceptualization of third-parties in Sustainable Supply Chain Management. Future research opportunities exist in broadening the utilization of theories and methods applied in the field, investing in under-explored aspects and broadening the scope of testing and building frameworks. Based on the synthesizing, propositions supplement future research directions. The novelty of this article lies in its investigation of how theories have been used in investigating and conceptualizing third-parties in Sustainable Supply Chain Management. By that, it contributes with a state-of-the-art view on the important topic of sustainability and how third-parties could solve sustainability challenges. With that, the article is a first attempt and step for extending the academic literature and practice with rethinking classic ways of managing sustainability and utilize out of the box ideas.