Ostwestfalen-Lippe University of Applied Sciences and Arts
Publikationen an der Technischen Hochschule Ostwestfalen-LippeNot a member yet
6551 research outputs found
Sort by
Auswirkung verschiedener Kontaminationsarten auf den Oberflächenkeimgehalt von Schweineschlachtkörpern
No full textTowards a sustainable approach to reconstruction of residential heritage: Insights from international case studies
No full textReconstruction and recovery of historic cities after destruction due to conflict or natural disasters have gained increasing relevance in the last decades. The investigation of international examples of recovery after war or natural catastrophic events can provide knowledge for improving guidance and strategies for sustainable reconstruction/ intervention in similar cases in the future. This paper aims to identify and analyze the legal, administrative, social, and economic factors that can favor the reconstruction and recovery processes of the historic city and its residential neighborhoods. An extensive review of international examples and literature on guidance has been conducted to provide insight into best practices and potential solutions. As a result, a set of lessons learned that can be used to address post-conflict and post-disaster recovery and reconstruction in similar situations is given
Mikroökonomik im Bachelor-Studium. eine Einführung mit Lernvideos
No full textDie Mikroökonomik als Teil der Volkswirtschaftslehre befasst sich mit Haushalten und Unternehmen als Nachfrager und Anbieter von Gütern. Sie liefert wichtige Erkenntnisse zum Verhalten dieser Marktteilnehmer: Warum schließen sich Unternehmen zu Kartellen zusammen und warum ist dies volkswirtschaftlich problematisch? Warum sind rote Rosen am Valentinstag teurer als sonst? Auch politische Entscheidungsträger profitieren von den Erkenntnissen der Mikroökonomik, indem sie die Wirkungen ihres Handelns besser abschätzen können.
Dieses multimediale Lehrbuch vermittelt die Grundzüge und Instrumente der Mikroökonomie auf völlig neue Weise. Neben klassischen Texten enthält es längere Lernvideos, in denen Inhalte erläutert werden. Sie sind damit wichtiger Bestandteil der Wissensvermittlung. Leser:innen werden zu Zuschauer:innen. Es passt sich damit perfekt an das geänderte Lernverhalten der Studierenden an. Zusätzliche Fragen per App: Laden Sie die Springer-Nature-Flashcards-App kostenlos herunter und nutzen Sie exklusives Zusatzmaterial, um Ihr Wissen zu prüfen
Influence of Hardness and Fatigue on the Lifetime of a Modified Silver Coating in Fretting Wear and Corrosion Tests
No full textThe reliability and lifetime of electrical contacts is an important aspect in system reliability and is influenced by numerous factors. Micro motions as well as vibrations lead to fretting wear, which can result in wear through of the protective coating. If this layer is worn through, the non-noble layer underneath is exposed, resulting in the occurrence of fretting corrosion with further relative motion. This leads to an increased electrical contact resistance (ECR) and can cause the contact to fail. Increasing the hardness of the coating material can reduce the wear and in turn increase contacts’ lifetime. The micro hardness, wear and lifetime of contacts with modified hard silver coatings are investigated in fretting wear and corrosion tests and the results compared to a conventional silver coating. Since one of the modifications shows a significant reduction in wear and hence improvement in lifetime, further analysis with SEM and FIB is conducted in order to identify the key mechanisms leading to this improvement. With a further increase in lifetime however, fatigue as well as delamination of the coating are revealed to be of high relevance. Both can be main causes of electrical contact failure under fretting load. In general, at lower number of cycles, increased micro hardness has the greatest effect on lifetime and wear while at the higher number of cycles, fatigue is observed to be the dominant failure mechanism
Comparison of different statistical methods for prediction of lifetime of electrical connectors with short term tests
No full textOptimized Operating Points for Power Electronic Building Blocks
No full textSystems that place high demands on availability are typically modular in design. However, a modular design also offers potential for optimized operation under norma requirements. In this paper we present an approach to find optimal operating points from the characteristic fields of individual modules. Our approach consists of a two-step procedure. In the first stage, Pareto sets are calculated using the NSGA-II genetic algorithm. The second stage contains a heuristic that finds situationally optimal operating points using a defined operating strategy
