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Urban pluvial flooding is a growing concern worldwide as consequence of rising urban population and climate change induced increases in heavy rainfall. Easy-to-implement and fast simulation tools are needed to cope with this challenge. This study describes the development of the parsimonious, GPU-accelerated hydraulic model RIM2D for urban pluvial flood simulations. This is achieved by considering the built-up urban area as flow obstacles, and by introducing capacity-based approaches to consider urban drainage by infiltration on pervious surfaces and sewer drainage from roofs and sealed surfaces. The model performance was analyzed by simulating 8 heavy rainfall events in a test area in the city of Dresden, Germany. For these events detailed discharge measurements of sewer discharge are available, providing a unique dataset for evaluating the sewer drainage simulation, which is of high importance for realistic pluvial inundation simulations in urban areas. We show that the model simulates the temporal dynamics of the sewer discharge and the sewer volume within acceptable ranges. Moreover, the erratic variation of the simulated to measured sewer discharge suggests that the deviations from the measurements are caused by the precipitation input rather than the model simplifications. We conclude that RIM2D is a valid tool for urban inundation simulation. Its short simulation runtimes allow probabilistic flood risk assessments and operational flood forecasts.
The comminution of multiphase particles depends on several influencing variables, such as the microstructure. This is often described in terms of defects, interfaces and phases. XCT (X-ray Computed Tomography) is used to gain insight into the microstructure of slag particles. Lithium aluminate slag is used as the slag system, with the lithium aluminate as the target phase which needs to be liberated. A slag cube with an edge length of about 4 mm was measured with the XCT (Zeiss Xradia 510 Versa). A 3D representation of the target phase can be obtained by further image processing of the raw data set. The XCT raw data set and the binary data set for the target phase are provided. The measurement and reconstruction settings can also be found here. This supplements ar part of the publication: Utilizing X-Ray computed tomography for lithium slag: A guide to analyze microstructure and its potential influence on liberation.
The aim of urban water resources management is, to describe the water related mass flows and their interactions between technical infrastructure and the natural environment elaborately. This should improve the conditions for identifying reasonable and sustainable management solutions.
Instances of the minimum cost multicut problem from a variety of applications.
Shape-changing interfaces are a type of user interface in human-computer interaction that can physically transform or change their form to convey information, provide feedback, or enhance user interaction. These interfaces use physical changes, such as altering their shape, texture, or tangible properties, to communicate information and create more intuitive and engaging interactions between humans and computers. We are researching this topic at the University of Applied Sciences in Dresden at the Chair of Visual Engineering (Professur für Technische Visualistik). Shape-changing displays represent an exciting area of research with numerous potential applications across various domains. By integrating advanced materials, mechanics, and electronics, these innovative systems have the potential to transform our interactions with information and technology, paving the way for new forms of expression, communication, and user experience. As this field continues to evolve, we can expect to see even more sophisticated and versatile shape-changing displays that push the boundaries of what is possible in display technologies.
In this study, ultrasonic decoating is investigated as a recycling process for solid oxide cells (SOC). SOC are mainly particle-based oxide ceramics and have a layer structure in the micrometer range. Critical raw materials such as nickel and various rare earth elements are present in high concentration in these layers. Based on the layer structure, the selective decoating approach has proven to be suitable for recovering very highly concentrated material streams without the need for complex separation processes. In ultrasonic decoating, the load is introduced on one side via a sonotrode. This leads to a preferential detachment of the stressed side. Ultrasonic decoating can be used to selectively separate the oxygen side layers of SOC.
Elastic displays afford a natural stacking of information layers in their haptic interaction space. So far, research has focused on technical issues and interaction concepts by pushing and pulling the surface of such displays. We report a study with 24 participants that investigates the feasibility and limitations of interaction with 6 to 21 layers. We measured completion times and error rates for reaching and holding specific target layers and observed performed gestures. Our findings show that solution time increases with more layers while precision is maintained with a mean success rate of holding a layer of 70 %, even when using up to 21 layers. User experience measurements show that hedonic qualities of the interaction were rated higher than pragmatic qualities. Our investigation proves the general feasibility of using layer-based interaction with an elastic display and provides guidelines on the limitations.
This file contains the raw data and data obtained from it for the publication "Ultrasonic decoating as a new recycling path to separate oxygen side layers of solid oxide cells". The file consists of: 1. an Excel document in which all quantitative data are compiled 2. a folder with all available raw images before and after ultrasonic decoating as well as binary images after segmentation for each investigated cell type
This collection contains Supporting Information for the publication "Supporting Information: Generative text-to-image diffusion for map creation based on geosocial media data." (Kartographische Nachrichten)