Simulative Untersuchung dezentraler Steuerungsverfahren komplexer Fördernetze

Dezentrale Steuerungstechnologien lassen Vorteile sowohl für die Implementierung als auch den späteren Betrieb des Steuerungsverbundes von Stetigfördersystemen erwarten. Gestützt werden solche Konzepte wesentlich durch die RFID-Technologie. Der verringerte Aufwand für Gerätetechnik und Softwarerealisierung bedeutet aber auch, dass das Anlagenverhalten nicht mehr - wie in zentral gesteuerten Systemen - vollständig determiniert ist. In diesem Artikel wird ein simulationsbasiertes Verfahren vorgestellt, mit dem strategieinduzierte Leistungsunterschiede dieser beiden Steuerungskonzepte vereinfachend, aber umfassend untersucht werden können, um die Eignung des dezentralen Konzeptes zu überprüfen.

Simulative study of the decentralized control of complex conveyor networks

Decentralised controls offer advantages for the implementation as well as the operation of controls of steady conveyors. Such concepts are mainly based on RFID. Due to the reduced expense for appliances and software, however, the plant behaviour cannot be determined as accurately as in centrally controlled systems. This article describes a simulation-based method by which the performances of these two control concepts can easily be evaluated in order to determine the suitability of the decentralised concept.

L'espace sacrificiel féminin dans le cinéma de Lars von Trier

La création cinématographique de l’étudiant qui accompagne ce mémoire sous la forme d’un DVD est disponible à la Médiathèque de la Bibliothèque des lettres et sciences humaines sous le titre : She is Lars.(http://atrium.umontreal.ca/notice/UM-ALEPH002343877)

On the Nusselt number for frazil ice growth—a correction to ”Frazil evolution in channels“ by Lars Hammar and Hung-Tao Shen

The growth (melt) rate of frazil ice is governed by heat transfer away from (towards) the ice crystal, which can be represented by the Nusselt number. We discuss choices for the Nusselt number and turbulent length scale appropriate for frazil ice and note an inaccuracy in the study ”Frazil evolution in channels“ by Lars Hammar and Hung-Tao Shen, which has also led to potentially significant errors in several other papers. We correct this error and suggest an appropriate strategy for determining the Nusselt number applicable to frazil ice growth and melting.

A pluralidade narrativa do cinema e a crítica negligente: estudo de caso : anticristo e melancolia, de Lars Von Trier

The cinematographic language is notedly plural and heterogeneous. There are many filmic elements that “narrate” all the time, in different ways. Besides enumerating some of them, this study seeks to analyse if the criticism is attentive to all of these tools or if it sticks only to some of them. It’s also reflects if this activity uses more objectives or subjectives aspects as basis for its conclusions. Here, a very specific field was chosen: the study is done by a comparative analysis of the reception of Brazilian’s and European’s criticism from two Lars Von Trier’s films, Antichrist and Melancholia. After explaining how the narrative elements are used in the cinema, it’s demonstrated that, in general, the criticism is negligent and does not analyze all of those tools. In some cases, the analysis of some elements is done in a superficial way, so others aspects can be highlighted