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Transition point prediction in a multicomponent lattice Boltzmann model: Forcing scheme dependencies
(2018)
Im Rahmen der vorliegenden wissenschaftlichen Arbeit wurde das Potenzial der einfachen Halbleitergassensoren zum Einsatz in komplexen Fragestellungen erforscht. Ein im wahrsten Sinne des Wortes brandaktuelles Thema, das hier in den Fokus geraten ist, ist die Detektion explosionsfähiger Substanzen. 42547 – so hoch war die Anzahl der Terroranschläge im Zeitraum 2000 bis 2016, die unter Einsatz von energetischen Materialien begangen wurden. Bei mehr als der Hälfte waren Menschenopfer zu beklagen. Terrorismus ist eine Gefahr und neue explosionsfähige Stoffmischungen, deren Analysedaten in keiner Datenbank eines Detektors enthalten sind, bilden zurzeit ein enormes Bedrohungspotential - solche Gefahrstoffe sind mit etablierten bibliothekgestützten Verfahren schwer nachweisbar. In dieser Arbeit wurde ein bibliothekfrei arbeitender Detektor entwickelt, der schnell und verlässlich die Explosionsfähigkeit unbekannter Substanzen anhand der Auswertung ihrer Reaktionsverläufe bewerten konnte. Es wurde gezeigt, dass der Einsatz von Halbleitergassensoren in Kombination mit Photodioden und einem Drucksensor unter Voraussetzung der durchdachten Reaktionsführung und Anwendung von auf die Aufgabenstellung zugeschnittenen Auswertealgorithmen zielführend ist und eine extrem hohe Detektionsrate von 99,8% ermöglicht. Des Weiteren wurde ein einfacher Herstellungsweg für Halbleitergassensoren ausgehend von der vorhandenen Precursorbibliothek gefunden, der in Zukunft gezielte Manipulation der sensorischen Eigenschaften der Halbleitergassensoren durch Variieren des eingesetzten Precursors sowie der Sensorherstellungsparameter erlaubt. Die auf diesem Weg gefertigten Sensoren wurden in den entwickelten Detektor integriert und zeigten großes Potential neben bibliothekfreier Einschätzung der Explosionsfähigkeit einer unbekannten Substanz auch Aussagen über deren Identität treffen zu können.
Analytical redundancy relations are fundamental in model-based fault detection and isolation. Their numerical evaluation yields a residual that may serve as a fault indicator. Considering switching linear time-invariant system models that use ideal switches, it is shown that analytical redundancy relations can be systematically deduced from a diagnostic bond graph with fixed causalities that hold for all modes of operation. Moreover, as to a faultless system, the presented bond graph–based approach enables to deduce a unique implicit state equation with coefficients that are functions of the discrete switch states. Devices or phenomena with fast state transitions, for example, electronic diodes and transistors, clutches, or hard mechanical stops are often represented by ideal switches which give rise to variable causalities. However, in the presented approach, fixed causalities are assigned only once to a diagnostic bond graph. That is, causal strokes at switch ports in the diagnostic bond graph reflect only the switch-state configuration in a specific system mode. The actual discrete switch states are implicitly taken into account by the discrete values of the switch moduli. The presented approach starts from a diagnostic bond graph with fixed causalities and from a partitioning of the bond graph junction structure and systematically deduces a set of equations that determines the wanted residuals. Elimination steps result in analytical redundancy relations in which the states of the storage elements and the outputs of the ideal switches are unknowns. For the later two unknowns, the approach produces an implicit differential algebraic equations system. For illustration of the general matrix-based approach, an electromechanical system and two small electronic circuits are considered. Their equations are directly derived from a diagnostic bond graph by following causal paths and are reformulated so that they conform with the matrix equations obtained by the formal approach based on a partitioning of the bond graph junction structure. For one of the three mode-switching examples, a fault scenario has been simulated.
As a result of ageing societies, the prevalence of dementia, and accordingly the need of care is increasing rapidly. Here, the use of ICT-based technologies may facilitate and promote a self-sustaining life-style for people with dementia and their caregivers. The presented poster describes early findings from the project MobiAssist and outlines the ICT-based training system. The system aims to increase the physical and cognitive capabilities of people with dementia, relief the caregivers and improve wellbeing of involved parties.
Speech understanding is a fundamental feature for many applications focused on human-robot interaction. Although many techniques and several services for speech recognition and natural language understanding have been developed in the last years, specific implementation and validation on domestic service robots have not been performed. In this paper, we describe the implementation and the results of a functional benchmark for speech understanding in service robotics that has been developed and tested in the context of different robot competitions: RoboCup@Home, RoCKIn@Home and within the European Robotics League on Service Robots. Different approaches used by the teams in the competitions are presented and the evaluation results obtained in the competitions are discussed.
Dementia not only affects the cognitive capabilities, especially memory and orientation, but also physical capabilities, which are associated with a decrease of physical activities. Here, ICT can play a major role to improve health, quality of life and wellbeing in older adults suffering from dementia and related stakeholders, such as relatives, professional and informal caregivers. The aim of the presented system is to increase physical and cognitive capabilities of people with dementia and their caregivers to support them in daily life activities, reduce the strain of the caregivers and improve both their wellbeing.
For the last 20 years, solid-phase microextraction (SPME) in headspace (HS) mode has been used as a valuable sample preparation technique for identifying degradation products in polymers and the determination of residual monomers and other light-boiling substances in polymeric materials. For more than 10 years, our laboratory has been involved in projects focused on the application of HS-SPME-gas chromatography–mass spectrometry (GC–MS) for the characterization of polymeric materials from many branches of manufacturing and building industries. This article describes the application of this technique for identifying volatile organic compounds (VOCs), additives, and degradation products in industrial rubber, car labeling reflection foil, and bone cement materials. The obtained analytical results were then used for troubleshooting and remedial action of the technological processes as well as for the health protection of producers and users.
Möchten Sie einen umfassenden Überblick über die Teilgebiete der Allgemeinen Betriebswirtschaftslehre bekommen? Dieses Buch hilft Ihnen dabei! Ausgewiesene Experten ihres Fachs erklären Ihnen in verständlicher Sprache und mit anschaulichen Beispielen alles, was Sie wissen müssen von der Materialwirtschaft über die Produktion und Logistik bis hin zum Marketing. Auch alle wichtigen Themen der Investition und Finanzierung, des internen und externen Rechnungswesens und der Unternehmensführung und -organisation werden auf fast 1000 Seiten ausführlich behandelt. (Verlagsangaben)
Digitalisierung für kleinere und mittlere Unternehmen (KMU): Anforderungen an das IT-Management
(2018)
Investition und Finanzierung sind wichtige Themen in der Unternehmenspraxis und im Studium der Betriebswirtschaftslehre. Dieses Buch führt Sie anhand anschaulicher Beispiele in die Grundlagen des Themas ein und zeigt die Ziele finanzwirtschaftlichen Handelns auf. Tobias Amely und Christine Immenkötter zeigen Ihnen die Grundzüge der Finanzwirtschaft und stellen Ihnen die wichtigsten Instrumente sowohl der Außen- und Innenfinanzierung als auch des Finanzmanagements vor. Lernen Sie die statische und dynamische Investitionsrechnung kennen und erfahren Sie, was man über Investitionen in Wertpapiere wissen muss. So liefert Ihnen dieses Buch im bewährten ... für Dummies-Stil einen guten und leicht verständlichen Überblick über alle wichtigen Themen der Investition und Finanzierung. (Verlagsangaben)
The elucidation of conformations and relative potential energies (rPEs) of small molecules has a long history across a diverse range of fields. Periodically, it is helpful to revisit what conformations have been investigated and to provide a consistent theoretical framework for which clear comparisons can be made. In this paper, we compute the minima, first- and second-order saddle points, and torsion-coupled surfaces for methanol, ethanol, propan-2-ol, and propanol using consistent high-level MP2 and CCSD(T) methods. While for certain molecules more rigorous methods were employed, the CCSD(T)/aug-cc-pVTZ//MP2/aug-cc-pV5Z theory level was used throughout to provide relative energies of all minima and first-order saddle points. The rPE surfaces were uniformly computed at the CCSD(T)/aug-cc-pVTZ//MP2/aug-cc-pVTZ level. To the best of our knowledge, this represents the most extensive study for alcohols of this kind, revealing some new aspects. Especially for propanol, we report several new conformations that were previously not investigated. Moreover, two metrics are included in our analysis that quantify how the selected surfaces are similar to one another and hence improve our understanding of the relationship between these alcohols.
Ob im Studium oder in der Praxis - bei der technischen Chemie kommt man schnell an seine Grenzen. Aber keine Sorge, "Technische Chemie für Dummies" hilft Ihnen, bei diesem komplexen Thema den Durchblick zu behalten. Nach einem allgemeinen Überblick über die Entwicklungen, Herausforderungen und Konzepte der technischen Chemie und einer verständlichen Übersicht über die nötige Mathematik lernen Sie, was man bei der praktischen und theoretischen Vorarbeit beachten muss, um die chemische Reaktion später in einem größeren Maßstab durchführen zu können. Anschließend erfahren Sie alles über Reaktionsmodellierung, Katalysatoren und chemische Reaktoren. Idealisierte Modelle helfen Ihnen dabei, aber auch die Umsetzung unter realen Bedingungen kommt nicht zu kurz. Der Verfahrenstechnik ist ein eigener Teil gewidmet, damit auch Trenntechnik, Strömungsmechanik, Fluidströmungen, Dimensionierung und Co. bald kein Problem mehr für Sie sind.
Motion capture, often abbreviated mocap, generally aims at recording any kind of motion -- be it from a person or an object -- and to transform it to a computer-readable format. Especially the data recorded from (professional and non-professional) human actors are typically used for analysis in e.g. medicine, sport sciences, or biomechanics for evaluation of human motion across various factors. Motion capture is also widely used in the entertainment industry: In video games and films realistic motion sequences and animations are generated through data-driven motion synthesis based on recorded motion (capture) data.
Although the amount of publicly available full-body-motion capture data is growing, the research community still lacks a comparable corpus of specialty motion data such as, e.g. prehensile movements for everyday actions. On the one hand, such data can be used to enrich (hand-over animation) full-body motion capture data - usually captured without hand motion data due to the drastic dimensional difference in articulation detail. On the other hand, it provides means to classify and analyse prehensile movements with or without respect to the concrete object manipulated and to transfer the acquired knowledge to other fields of research (e.g. from 'pure' motion analysis to robotics or biomechanics).
Therefore, the objective of this motion capture database is to provide well-documented, free motion capture data for research purposes.
The presented database GraspDB14 in sum contains over 2000 prehensile movements of ten different non-professional actors interacting with 15 different objects. Each grasp was realised five times by each actor. The motions are systematically named containing an (anonymous) identifier for each actor as well as one for the object grasped or interacted with.
The data were recorded as joint angles (and raw 8-bit sensor data) which can be transformed into positional 3D data (3D trajectories of each joint).
In this document, we provide a detailed description on the GraspDB14-database as well as on its creation (for reproducibility).
Chapter 2 gives a brief overview of motion capture techniques, freely available motion capture databases for both, full body motions and hand motions, and a short section on how such data is made useful and re-used. Chapter 3 describes the database recording process and details the recording setup and the recorded scenarios. It includes a list of objects and performed types of interaction. Chapter 4 covers used file formats, contents, and naming patterns. We provide various tools for parsing, conversion, and visualisation of the recorded motion sequences and document their usage in chapter 5.
Nachhaltiges Wirtschaften ist eine Zukunftsaufgabe, der sich das Buch aus verschiedenen Perspektiven widmet. Im Mittelpunkt steht dabei die Frage, wie die Wettbewerbsfähigkeit unseres Landes erhalten, gestärkt und damit die Zukunftsperspektiven der nächsten Generation gesichert werden können. Behandelt werden darüber hinaus u. a. Fragen nach den ethisch sinnvollen Verankerungsmöglichkeiten von Nachhaltigkeit im Unternehmen und in der Gesellschaft, nach der rechtlichen Unterstützung des globalen nachhaltigen Wirtschaftens, nach den Instrumenten für zukünftige Führungskräfte und den Nutzungsmöglichkeiten von Innovationen für ein nachhaltiges Wachstum, nach den Messungs- und Steuerungsmöglichkeiten von Nachhaltigkeit sowie nach der Perspektive des nachhaltigen Controlling im Nachfolgeprozess. Zusätzlich zur Erörterung praktischer Erfahrungen in Organisationen bilden die nachhaltige Entwicklung der Finanzwirtschaft und die Auswirkungen der Digitalisierung auf die Immobilienbranche weitere thematische Schwerpunkte.