TY - INPR A1 - Witt, Karl Josef A1 - Wudtke, Robert-Balthasar T1 - Implementation and Improvement of Design and Authorisation Procedures for proposed Tailings Facilities N2 - The report is part of the research project 'TAILSAFE'. The project is supported by the european union. Basics of design and investigation procedures are presented within the report. Furthermore possible applications of design and investigation procedures are evaluated concerning to a smooth work during all using phases of a tailings facility, that is the planning and execution. Finally recomendations are given to optimise the handling with significant standards. N2 - Der Bericht ist Teil des von der Europäischen Gemeinschaft geförderten Forschungsprojektes 'Tailsafe'. Im Bericht werden Grundlagen der von Bemessungs- und Erkundungsprozeduren übersichtlich dargestellt und im Hinblick auf einen möglichst reibunglosen Ablauf zu allen Nutzungsphasen einer Tailings-Anlage ausgewertet. Schließlich werden Empfehlungen zur Optimierung der durch öffizielle Stellen zu verwendenden Regelwerke gegeben. KW - Bergeteich KW - Feldversuch KW - Experiment KW - Geotechnik KW - Hydrologie KW - Management KW - Arbeitsablauf KW - Reststoff KW - Bergbau KW - tailings dam KW - tailings facility Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-7964 ER - TY - INPR A1 - Koch, Florian T1 - Zwischen Transformation und Globalisierung - Immobilienmarkt und Stadtentwicklung in Warschau T1 - Real estate markets and urban development in Warsaw N2 - Nach der politischen Wende Ende der 1980er/Anfang der 1990er Jahre entwickelte sich in Warschau innerhalb kurzer Zeit ein hoch dynamischer Immobilienmarkt kapitalistischer Prägung, dessen Mechanismen grundlegende Auswirkungen auf die Stadtentwicklung Warschaus haben. Im folgenden Aufsatz werden die wesentlichen Eigenschaften des Büro- und Wohnungsmarkts aufgezeigt. Es werden für jeden Sektor die Funktionsweise, die wesentlichen Akteure der Nachfrage- und Angebotsseite, die Rolle der Institutionen und die räumlichen Konsequenzen dargestellt. KW - Immobilienmarkt KW - Warschau KW - Stadtentwicklung KW - Stadtforschung KW - Wohnungsmarkt KW - Transformation KW - Globalisierung Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-7952 ER - TY - INPR A1 - Grundhöfer, Anselm A1 - Bimber, Oliver T1 - Real-Time Adaptive Radiometric Compensation N2 - Recent radiometric compensation techniques make it possible to project images onto colored and textured surfaces. This is realized with projector-camera systems by scanning the projection surface on a per-pixel basis. With the captured information, a compensation image is calculated that neutralizes geometric distortions and color blending caused by the underlying surface. As a result, the brightness and the contrast of the input image is reduced compared to a conventional projection onto a white canvas. If the input image is not manipulated in its intensities, the compensation image can contain values that are outside the dynamic range of the projector. They will lead to clipping errors and to visible artifacts on the surface. In this article, we present a novel algorithm that dynamically adjusts the content of the input images before radiometric compensation is carried out. This reduces the perceived visual artifacts while simultaneously preserving a maximum of luminance and contrast. The algorithm is implemented entirely on the GPU and is the first of its kind to run in real-time. KW - Maschinelles Sehen KW - CGI KW - Bildbasiertes Rendering KW - Display KW - Projektionsverfahren KW - Radiometrische Kompensation KW - Projektion KW - Projekor-Kamera System KW - Bildkorrektur KW - Visuelle Wahrnehmung KW - radiometric compensation KW - projection KW - projector-camera systems KW - image correction KW - visual perception Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-7848 ER - TY - INPR A1 - Wetzstein, Gordon A1 - Bimber, Oliver T1 - A Generalized Approach to Radiometric N2 - We propose a novel method that applies the light transport matrix for performing an image-based radiometric compensation which accounts for all possible types of light modulation. For practical application the matrix is decomposed into clusters of mutually influencing projector and camera pixels. The compensation is modeled as a linear system that can be solved with respect to the projector patterns. Precomputing the inverse light transport in combination with an efficient implementation on the GPU makes interactive compensation rates possible. Our generalized method unifies existing approaches that address individual problems. Based on examples, we show that it is possible to project corrected images onto complex surfaces such as an inter-reflecting statuette, glossy wallpaper, or through highly-refractive glass. Furthermore, we illustrate that a side-effect of our approach is an increase in the overall sharpness of defocused projections. KW - Association for Computing Machinery / Special Interest Group on Graphics KW - CGI KW - Maschinelles Sehen Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-7625 ER - TY - INPR A1 - Rostalski, Michael T1 - Informelle Prozesse der Beteiligung bei der Stadtentwicklung. Die Genese der Zwischennutzung - eine Fallstudienbetrachtung zum Berliner „Revaler Viereck“ T1 - Informal Processes of Participation in Urban Developments. The Genesis of Interim Use - the Case Study "Revaler Viereck" in Berlin. N2 - Das heterogene Gefüge der Stadt wird überlagert von „dualen“ Unterschieden: den lokalen und überregionalen Interessen. Der Beitrag beschreibt einen Teilhabeprozess, begonnen als (Zwischen-)Nutzung einer Industriebrache durch Anwohner in Friedrichshain,einem durch Gentrifizierung geprägten Berliner Stadtteil. Informelle Aktivitäten auf einem ehemaligen Reichsbahnausbesserungswerk (RAW) stehen als Konzept den formellen Planungsergebnissen gegenüber. Das aktive Umsetzen eigener Ideen durch die Nachbarschaft und der parteiübergreifende Anspruch der Bezirkspolitik, einen konsensualen Planungsprozess zu führen, veränderten die Form der Bürgerbeteiligung. Das könnte die planungstheoretischen Diskussionen um Governancemodelle bereichern. KW - Zwischennutzung KW - Planungsprozess KW - Planung KW - Informalität KW - Akteure KW - Governance KW - informal KW - action Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20080704-13665 ER - TY - INPR A1 - Zollmann, Stefanie A1 - Bimber, Oliver T1 - Imperceptible Calibration for Radiometric Compensation N2 - We present a novel multi-step technique for imperceptible geometry and radiometry calibration of projector-camera systems. Our approach can be used to display geometry and color corrected images on non-optimized surfaces at interactive rates while simultaneously performing a series of invisible structured light projections during runtime. It supports disjoint projector-camera configurations, fast and progressive improvements, as well as real-time correction rates of arbitrary graphical content. The calibration is automatically triggered when mis-registrations between camera, projector and surface are detected. KW - Association for Computing Machinery / Special Interest Group on Graphics KW - CGI KW - Maschinelles Sehen KW - unsichtbare Muster Projektion KW - Projektor-Kamera Systeme KW - Kalibrierung KW - Radiometrische Kompensation KW - imperceptible pattern projection KW - projector-camera systems KW - calibration KW - radiometric compensation Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-8094 ER - TY - INPR A1 - Langlotz, Tobias A1 - Bimber, Oliver T1 - Unsynchronized 4D Barcodes N2 - We present a novel technique for optical data transfer between public displays and mobile devices based on unsynchronized 4D barcodes. We assume that no direct (electromagnetic or other) connection between the devices can exist. Time-multiplexed, 2D color barcodes are displayed on screens and recorded with camera equipped mobile phones. This allows to transmit information optically between both devices. Our approach maximizes the data throughput and the robustness of the barcode recognition, while no immediate synchronization exists. Although the transfer rate is much smaller than it can be achieved with electromagnetic techniques (e.g., Bluetooth or WiFi), we envision to apply such a technique wherever no direct connection is available. 4D barcodes can, for instance, be integrated into public web-pages, movie sequences or advertisement presentations, and they encode and transmit more information than possible with single 2D or 3D barcodes. KW - Maschinelles Sehen KW - Computer Vision KW - Barcodes Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-8531 ER - TY - INPR A1 - König, Reinhard A1 - Müller, Daniela T1 - Cellular-Automata-Based Simulation of the Settlement Development in Vienna N2 - The motivation to deal with the topic simulation of the settlement development in a city in the past 120 years has been to acquire general methods for the analysis and simulation of settlement development processes on the one hand and to verify these methods on the example of the real development of the city of Vienna on the other hand. We follow the assumption that the underlying processes of the urban development can be reduced to various pronounced but always the same hidden driving forces. The objective is to validate the simulation model by the real settlement development and to provide a solid base for the simulation of possible development scenarios of the city of Vienna. The basis for the validation are digital cellular processed and statistical analysed data of the development of the technical infrastructure, the public transportation systems and the population density in Vienna between 1888 and 2001. The simulation method is based on the technique of Cellular Automata (CA) that permits the simulation of the interaction between a potential field and the development of individual areas. This modelling technique is well known as “reaction diffusion” or “dialectic breakdown”. The CA serves as representation of the examined space and divides this space into individual cells. Each of these cells can save certain information (population density, infrastructure facility, development quality) and exchange them locally with the neighbouring cells. The used model parameters permit the simulation of different spread patterns und spread speeds of a settlement structure. From the results methodological, structural, spatial and temporal regularities of urban development processes are derived. KW - Computersimulation KW - urban simulation KW - urban modelling KW - vienna Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20110415-15449 SN - 978-953-307-230-2 ER - TY - INPR A1 - Simon-Ritz, Frank A1 - Rudolf, Sylvelin T1 - Ein Schaufenster für die Kunst N2 - Kunstausstellungen in Bibliotheken KW - Ausstellung KW - Kunstausstellung Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170711-32307 N1 - This is the pre-peer reviewed version of the following article: https://zs.thulb.uni-jena.de/receive/jportal_jparticle_01036154 VL - 69 IS - Heft 6 SP - 312 EP - 317 ER - TY - INPR A1 - Steiner, Maria A1 - Bourinet, Jean-Marc A1 - Lahmer, Tom T1 - An adaptive sampling method for global sensitivity analysis based on least-squares support vector regression N2 - In the field of engineering, surrogate models are commonly used for approximating the behavior of a physical phenomenon in order to reduce the computational costs. Generally, a surrogate model is created based on a set of training data, where a typical method for the statistical design is the Latin hypercube sampling (LHS). Even though a space filling distribution of the training data is reached, the sampling process takes no information on the underlying behavior of the physical phenomenon into account and new data cannot be sampled in the same distribution if the approximation quality is not sufficient. Therefore, in this study we present a novel adaptive sampling method based on a specific surrogate model, the least-squares support vector regresson. The adaptive sampling method generates training data based on the uncertainty in local prognosis capabilities of the surrogate model - areas of higher uncertainty require more sample data. The approach offers a cost efficient calculation due to the properties of the least-squares support vector regression. The opportunities of the adaptive sampling method are proven in comparison with the LHS on different analytical examples. Furthermore, the adaptive sampling method is applied to the calculation of global sensitivity values according to Sobol, where it shows faster convergence than the LHS method. With the applications in this paper it is shown that the presented adaptive sampling method improves the estimation of global sensitivity values, hence reducing the overall computational costs visibly. KW - Approximation KW - Sensitivitätsanalyse KW - Abtastung KW - Surrogate models KW - Least-squares support vector regression KW - Adaptive sampling method KW - Global sensitivity analysis KW - Sampling Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20181218-38320 N1 - This is the pre-peer reviewed version of the following article: https://www.sciencedirect.com/science/article/pii/S0951832017311808, which has been published in final form at https://doi.org/10.1016/j.ress.2018.11.015. SP - 1 EP - 33 ER -