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"Simplizistische Lösungen verbieten sich." Mit diesem Satz forderte der frühere Vorsitzende des Bundestagsauschusses für wirtschaftliche Zusammenarbeit, Prof. Dr. Uwe Holtz, schon vor dreißig Jahren angemessene Lösungen für globale Politik. Gerade auf die Unüberschaubarkeit und Wechselwirkung globaler Herausforderungen darf nicht mit einfachen Rezepten geantwortet werden. Dr. Eckhard Deutscher, Vorsitzender des Entwicklungsausschusses der OECD, und Prof. Dr. Hartmut Ihne, Präsident der Hochschule Bonn-Rhein-Sieg, ehren mit dem von ihnen herausgegebenen Aufsatzband Uwe Holtz als einen wichtigen Vordenker globaler Entwicklungen.
Als Auftaktband der Internationalen Schriftenreihe der Hochschule Bonn-Rhein-Sieg bietet der Sammelband Analysen zu aktuellen Themen in Außen-, Sicherheits-, Umwelt und Entwicklungspolitik. Führende Persönlichkeiten der internationalen Zusammenarbeit, der Entwicklungspolitik und der Entwicklungsforschung kommen darin zu Wort.
This ICB Research Report constitutes the proceedings of the following four workshops which were held on Tuesday, 29th June 2010 as part of the Requirements Engineering: Foundation for Software Quality (REFSQ) conference 2010 at the University of Duisburg-Essen. First Workshop on Creativity in Requirements Engineering (CreaRE). First International Workshop on Product Line Requirements Engineering and Quality (PLREQ). First Workshop on Requirements Prioritization for customer-oriented Software-Development (RePriCo). First Workshop on Requirements Engineering in Small Companies (RESC).
In Mixed Reality (MR) Environments, the user's view is augmented with virtual, artificial objects. To visualize virtual objects, the position and orientation of the user's view or the camera is needed. Tracking of the user's viewpoint is an essential area in MR applications, especially for interaction and navigation. In present systems, the initialization is often complex. For this reason, we introduce a new method for fast initialization of markerless object tracking. This method is based on Speed Up Robust Features and paradoxically on a traditional marker-based library. Most markerless tracking algorithms can be divided into two parts: an offline and an online stage. The focus of this paper is optimization of the offline stage, which is often time-consuming.
The development of robot control programs is a complex task. Many robots are different in their electrical and mechanical structure which is also reflected in the software. Specific robot software environments support the program development, but are mainly text-based and usually applied by experts in the field with profound knowledge of the target robot. This paper presents a graphical programming environment which aims to ease the development of robot control programs. In contrast to existing graphical robot programming environments, our approach focuses on the composition of parallel action sequences. The developed environment allows to schedule independent robot actions on parallel execution lines and provides mechanism to avoid side-effects of parallel actions. The developed environment is platform-independent and based on the model-driven paradigm. The feasibility of our approach is shown by the application of the sequencer to a simulated service robot and a robot for educational purpose.
This report presents the implementation and evaluation of a computer vision problem on a Field Programmable Gate Array (FPGA). This work is based upon [5] where the feasibility of application specific image processing algorithms on a FPGA platform have been evaluated by experimental approaches. The results and conclusions of that previous work builds the starting point for the work, described in this report. The project results show considerable improvement of previous implementations in processing performance and precision. Different algorithms for detecting Binary Large OBjects (BLOBs) more precisely have been implemented. In addition, the set of input devices for acquiring image data has been extended by a Charge-Coupled Device (CCD) camera. The main goal of the designed system is to detect BLOBs in continuous video image material and compute their center points.
This work belongs to the MI6 project from the Computer Vision research group of the University of Applied Sciences Bonn-Rhein-Sieg1 . The intent is the invention of a passive tracking device for an immersive environment to improve user interaction and system usability. Therefore the detection of the users position and orientation in relation to the projection surface is required. For a reliable estimation a robust and fast computation of the BLOB's center-points is necessary. This project has covered the development of a BLOB detection system on an Altera DE2 Development and Education Board with a Cyclone II FPGA. It detects binary spatially extended objects in image material and computes their center points. Two different sources have been applied to provide image material for the processing. First, an analog composite video input, which can be attached to any compatible video device. Second, a five megapixel CCD camera, which is attached to the DE2 board. The results are transmitted on the serial interface of the DE2 board to a PC for validation of their ground truth and further processing. The evaluation compares precision and performance gain dependent on the applied computation methods and the input device, which is providing the image material.
Reversible logic synthesis is an emerging research topic with different application areas like low-power CMOS design, quantum- and optical computing. The key motivation behind reversible logic synthesis is the optimization of the heat dissipation problem current architectures show, by reducing it to theoretically zero [2].
The introduction of new steering conceptsSteer-by-Wire (SBW) gives possibility to replace theconventional steering wheel by an alternative userinterface such as a sidestick. In SBW system the sidestickcan be used as user input element instead of a steeringwheel. The implementation of sidestick in the Human-Machine-Interface (HMI) allows combiningthe conventional steering consisting of a steeringwheel, an accelerator and a brake pedal into a singleelement. Also the implementation of the sidestickcreates new, interesting and flexible design optionswhich can be used to transform the driver’s spatialenvironment. This article describes an active sidestickfor a vehicle which has been developed, integrated andtested in accordance of haptic, ergonomic and safetyrelevant requirements. The control strategies used forthe active attenuators of the sidestick have beeninvestigated and optimised using a Simulink model.
In this paper, we describe an approach to academic teaching in computer science using storytelling as a means to investigate to hypermedia and virtual reality topics. Indications are shown that narrative activity within the context of a Hypermedia Novel related to educational content can enhance motivation for self-conducted learning and in parallel lead to an edutainment system of its own. In contrast to existing approaches the Hypermedia Novel environment allows an iterative approach to the narrative content, thereby integrating story authoring and story reception not only in the beginning but at any time. The narrative practice and background research as well as the resulting product can supplement lecture material with comparable success to traditional academic teaching approaches. On top of this there is the added value of soft skill training and a gain of expert knowledge in areas of personal background research.
Schwingungen sind Bestandteil einer jeden Maschine mit beweglichen Teilen, manchmal sind sie unbedeutend, manchmal deutlich merkbar. Die Überwachung von Schwingungen einer Maschine kann dazu dienen, die Maschinenfunktion zu kontrollieren oder auch frühzeitig Verschleißschäden zu erkennen. Stand der Technik ist die Messung von Schwingungen mit präzisen, aber auch kostenintensiven piezoelektrischen Beschleunigungssensoren und aufwändigen Messsystemen. Solche konventionellen Systeme sind für hochpreisige Maschinen und Anlagen, z. B. Windkraftanlagen, einsetzbar, aber nicht für kleine und mittelgroße Maschinen. Hier besteht der Bedarf an wirklichen Low-Cost Messsystemen, die so günstig sind, dass sie permanent in die Maschine integriert sind und permanent die Schwingungen überwachen. Im Forschungsprojekt wurde ein Baukasten aus kommerziell verfügbaren Komponenten entwickelt, mit dem Low-Cost Schwingungsmesssysteme aufgebaut werden können.
This report describes the design, the implementation and the usage of a system for managing different systems for automated theorem proving and automatically generated proofs. In particular, we focus on a user-friendly web-based interface and a structure for collecting and cataloguing proofs in a uniform way. The second point hopefully helps to understand the structure of automatically generated proofs and builds a starting point for new insights for strategies for proof planning.
Nachhaltig gestiegene Energiepreise haben vor dem Hintergrund begrenzter IT-Budgets zum Nach- und teilweise auch Umdenken geführt. Ähnlich der „Bio-Welle“ im Lebensmittelbereich ist derzeit eine „Grüne-Welle“ unter IT-Anbietern und deren Kunden zu verspüren. Unter Green IT kann der energiesparende Umgang mit IT-Ressourcen verstanden werden. Hierzu gehören energiesparende Investitionen in Hardware, Software und Services, aber auch Veränderungen in der Geschäfts- und IT-Strategie. Allerdings zeigen verschiedene Studien, dass noch kein durchgängiges Verständnis über Green IT existiert. In vielen Fällen sind dem IT-Management die Energiekosten für den Betrieb zentraler IT-Systeme (Server im Rechenzentrum u. a.) und dezentraler Arbeitsplatzsysteme (Desktops, Laptops u. a.) weitgehend unbekannt. Eine aktuelle Umfrage hat ergeben, dass ein Drittel der Unternehmen ihre Energiekosten für den Betrieb der IT nicht kennen. Zudem werden bei Investitionsentscheidungen die Energiekosten nur rudimentär oder gar nicht in den Entscheidungsprozess einbezogen. Gleichzeitig prognostizieren Analysten wie die Gartner Group einen stark steigenden Markt für IT-Leistungen, die unter dem Schlagwort „Green IT“ vermarktet werden. Stand bislang die Einsparung von Energiekosten im zentralen Rechenzentrum im Vordergrund, weiten sich die Bemühungen auch im dezentralen IT-Umfeld, also in den Büros mit ihren Arbeitsplatzsystemen (Desktops, Laptops etc.) aus. Nach Untersuchungen der Experton Group fallen mehr als 60 % der IT-getriebenen Energiekosten außerhalb des Rechenzentrums an, also in Büros und anderen Unternehmensbereichen.
Threat Modeling ermöglicht als heuristisches Verfahren die methodische Überprüfung eines Systementwurfs oder einer Softwarearchitektur, um Sicherheitslücken kostengünstig und frühzeitig - idealerweise in der Design Phase - im Software-Entwicklungsprozess zu identifizieren, einzugrenzen und zu beheben. Threat Modeling lässt sich aber auch noch erfolgreich in der Verifikationsphase oder noch später - nach dem Release - zur Auditierung der Software einsetzen. Durch die Früherkennung von Sicherheitslücken können die Kosten zur Behebung bis auf ein Hundertstel reduziert werden. Die auf dem Markt verfügbaren Threat Modeling Tools werden identifiziert, analysiert und hinsichtlich Ihrer Eignung zur Erstellung komplexer, vollständiger Threat Models mit entwickelten Bewertungsparametern einem einfachen Bewertungsverfahren unterworfen.
Bond Graph Methodology
(2010)
Nowadays, engineering systems are becoming increasingly complex and, for design purposes, must be considered as multidisciplinary systems made up of components from different engineering disciplines. With regard to the systematic development and the analysis of models, interdisciplinary methodologies supported by software become more and more important. Bond graphs are a graphical description formalism particularly suited for multidisciplinary systems and used by modellers across the world.
Bond Graph Methodology gives a comprehensive, in-depth representation of the state of the art, including recent results gathered from research articles, dissertations and contributions by the author on a number of topics. The structured and rigorous presentation systematically covers model development, analysis of models, numerical computation of models and modern software that can be used for a bond graph approach. The book also includes a range of case studies illustrating various applications of the methodology and provides a glossary.
Bond Graph Methodology addresses fundamentals, as well as advanced topics, e.g., models of variable structure, bond graphs for sensitivity analysis and generation of equations for the study of robustness. The compilation and presentation of the material has been inspired by the author's extensive experience in research and teaching.
A useful text for advanced courses in modelling, simulation and control, Bond Graph Methodology can also be used for self-study. It has been designed to serve readers interested in the subject of bond graph modelling and those with expertise in related areas, as well as members of the worldwide community of bond graph modellers.
Business Process Management
(2010)