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21st International Conference on Web3D technology, Web3D 2016

作者： Gutbell, Ralf Pandikow, Lars Coors, Volker Kammeyer, Yasmina Fraunhofer Institute for Computer Graphics Research IGD Technische Universität Darmstadt Stuttgart Technology University of Applied Sciences Germany

ISBN: (纸本)9781450344289

Today various data formats and different browser based 3D globes and other viewer implementations are available. To enable interoperable visualizations between them and to integrate the distributed data, a standardized interface on the server side is necessary for the portrayal of 3D geospatial data. We therefore present a framework implementing the new 3D Portrayal Service standard (3DPS) of the Open Geospatial Consortium (OGC). The focus of the paper is on the View conformance class of the 3DPS that supports the delivery of server-side rendered high resolution images. An introduction to the main aspects and features of the 3DPS standard is given. The framework controls the workflow from the storage of geographical raw data to the creation of the visual end result. The framework is open for extensions giving the ability to utilize different technologies. On the other hand the framework encapsulates server technology and starts server instances, which scale to handle a massive amount of requests. The framework implementation also inherits the 3DPS specific implementation overhead, allowing the framework user to focus on implementing his technology. Building upon the framework, two prototypical applications are presented, which use different renderers, data formats and storage solutions. Based on these two prototype service implementations, a distributed data set is integrated in a web-based visualization. It shows that geospatial data can be served by different independent data providers without a data integration on the data model level. The results are a significant step forward to a 3D distributed geospatial data infrastructure based on open standard service interfaces. In addition, the use of different data formats produced interesting insights in their performance for server-side rendering. This work will be beneficial for researchers wanting to support 3DPS GetView without having to take care of the standard's overhead and the implicitly needed. © 2016 ACM.

关键词： Data integration

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A feasibility study on SSVEP-based interaction with motivating and immersive virtual and augmented reality

arXiv

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arXiv 2017年

作者： Faller, J. Allison, B.Z. Brunner, C. Scherer, R. Schmalstieg, D. Pfurtscheller, G. Neuper, C. Institute for Knowledge Discovery Laboratory of Brain-Computer Interfaces Graz University of Technology Krenngasse 37 Graz8010 Austria Institute for Computer Graphics and Vision Graz University of Technology Inffeldgasse 16c Graz8010 Austria Department of Psychology University of Graz Universitätsplatz 2/III Graz8010 Austria

Non-invasive steady-state visual evoked potential (SSVEP) based brain-computer interface (BCI) systems offer high bandwidth compared to other BCI types and require only minimal calibration and training. Virtual reality (VR) has been already validated as effective, safe, affordable and motivating feedback modality for BCI experiments. Augmented reality (AR) enhances the physical world by superimposing informative, context sensitive, computer generated content. In the context of BCI, AR can be used as a friendlier and more intuitive real-world user interface, thereby facilitating a more seamless and goal directed interaction. This can improve practicality and usability of BCI systems and may help to compensate for their low bandwidth. In this feasibility study, three healthy participants had to finish a complex navigation task in immersive VR and AR conditions using an online SSVEP BCI. Two out of three subjects were successful in all conditions. To our knowledge, this is the first work to present an SSVEP BCI that operates using target stimuli integrated in immersive VR and AR (head-mounted display and camera). This research direction can benefit patients by introducing more intuitive and effective real-world interaction (e.g. smart home control). It may also be relevant for user groups that require or benefit from hands free operation (e.g. due to temporary situational disability). Copyright © 2017, The Authors. All rights reserved.

关键词： Interface states

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P158The role of left atrium in patient with myocardial infarction with ST-segment elevation (STEMI)

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European Heart Journal - Cardiovascular Imaging 2019年第SUPPLEMENT_2期20卷

作者： Pavon, A Masci, P G Bermano, A Vaxman, A Gotsman, C Lauriers, N Rodrigues, D Monney, P Rutz, T Eeckhout, E Muller, O Schwitter, J University Hospital Centre Vaudois (CHUV) Lausanne Switzerland Kings College London School of Bioengineer and Medical Sciences Life Sciences King’s College London United Kingdom of Great Britain & Northern Ireland University of Zurich Computer Graphics lab Zurich Switzerland Geometric Modeling and Industrial Geometry group Vienna University of Technology wien Austria Jacobs Technion-Cornell Institute at Cornell Tech new york United States of America

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Visual analytics for the exploration and assessment of segmentation errors

Visual analytics for the exploration and assessment of segme...

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2016 Eurographics Workshop on Visual Computing for Biology and Medicine, VCBM 2016

作者： Raidou, R.G. Marcelis, F.J.J. Breeuwer, M. Gröller, M.E. Vilanova, A. van de Wetering, H.M.M. Eindhoven University of Technology Netherlands Philips Healthcare Best Netherlands Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Austria Delft University of Technology Netherlands

ISBN: (纸本)9783038680109

Several diagnostic and treatment procedures require the segmentation of anatomical structures from medical images. However, the automatic model-based methods that are often employed, may produce inaccurate segmentations. These, if used as input for diagnosis or treatment, can have detrimental effects for the patients. Currently, an analysis to predict which anatomic regions are more prone to inaccuracies, and to determine how to improve segmentation algorithms, cannot be performed. We propose a visual tool to enable experts, working on model-based segmentation algorithms, to explore and analyze the outcomes and errors of their methods. Our approach supports the exploration of errors in a cohort of pelvic organ segmentations, where the performance of an algorithm can be assessed. Also, it enables the detailed exploration and assessment of segmentation errors, in individual subjects. To the best of our knowledge, there is no other tool with comparable functionality. A usage scenario is employed to explore and illustrate the capabilities of our visual tool. To further assess the value of the proposed tool, we performed an evaluation with five segmentation experts. The evaluation participants confirmed the potential of the tool in providing new insight into their data and employed algorithms. They also gave feedback for future improvements. © 2016 The Author(s) Eurographics Proceedings © 2016 The Eurographics Association.

关键词： Errors

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Assessment of STEM e-Learning in an immersive virtual reality (VR) Environment 123

Assessment of STEM e-Learning in an immersive virtual realit...

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123rd ASEE Annual Conference and Exposition

作者： El-Mounayri, Hazim A. Rogers, Christian Fernandez, Eugenia Satterwhite, Jesse Connor Department of Mechanical Engineering Purdue School of Engineering and Technology IUPUI United States Department of Computer and Information Graphics Technology Purdue School of Engineering and Technology IUPUI United States Department of Electrical and Computer Engineering Purdue School of Engineering and Technology IUPUI United States

This paper shows the early research findings of utilizing a virtual reality environment as an educational tool for the operation of a computerized numerical control (CNC) milling machine. Based off of a previous work, the Advanced Virtual Machining Lab (AVML), this project features a virtual environment in which a virtual CNC machine is fully operable, designed to allow STEM students and training professionals to learn the use of the CNC machine without the need to be in a physical lab. Users operate in the virtual environment using an immersive virtual reality headset (i.e. Oculus Rift) and standard input devices (i.e. mouse and keyboard), both of which combined make for easy movement and realistic visuals. On-screen tutorials allow users to learn about what they need to do to operate the machine without the need for outside instruction. While designing and perfecting this environment has been the primary focus of this project thus far, the research goal is to test the ease of use and the pedagogical effectiveness of the immersive technology as it relates to education in STEM fields. Initial usability studies for this environment featured students from the graduate level CAD/CAM-Theory and Advanced Applications (ME 54600) course at IUPUI. Results from the study were tabulated with a survey using a four-point Likert scale and several open-ended questions. Findings from the survey indicate that the majority of users found the environment realistic and easy to navigate, in addition to finding the immersive technology to be beneficial. Many also indicated that they felt comfortable navigating the environment without the need for additional assistance from the survey proctors. Full details on the first usability study, including data and discussion, can be found in this paper. The general consensus from the study was that, while some features needed refinement, the immersive environment helped them learn about the operation of a CNC machine. Additional usability studies

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Contemporary methods of production and application of pigments obtained from titanium dioxide

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IOP Conference Series: Materials Science and Engineering 2018年第1期451卷

作者： A V Vyboishchik I L Kostiunina Automated Machine-Building Technology South Ural State University 76 Lenin Avenue Chelyabinsk 454080 Russia Engineering and Computer Graphics South Ural State University 76 Lenin Avenue Chelyabinsk 454080 Russia

The current article describes the methods of producing titanium dioxide, or titania, which is used in various branches of the industry, including construction as a basis for producing white pigments. The base pigment grades of titania with their qualitative characteristics are listed, the modifying agents, applied in producing pigment grades, are presented, the several technologies of producing titania are mentioned. To obtain titania with different characteristics, various methods of treatment, viz. chemical or heat treatment, are used. To raise the material index of raw materials, used for producing titania and, simultaneously, to lower the obtaining of waste materials, several methods of obtaining titania from titanium slags and waste catalysts are offered. When applying the offered technologies, the range of the usage of titania will be expanded, and the efficiency of using raw materials will be increased.

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Contemporary methods of production of pigments obtained from non-ferrous industrial waste

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IOP Conference Series: Materials Science and Engineering 2018年第1期451卷

The current article describes green pigments' manufacturing and application problems. Verditer green, or green pigment, is a group or chemical compounds used in various branches of industry, especially in manufacturing paints used for decoration and restoration of engineering constructions and other buildings. The properties and methods of obtaining verditer green from industrial waste are presented with the properties of viridian and cobalt green taken as the examples of green pigments. The technology of obtaining chromium oxide III, chromium hydroxide III, cobalt green including the required equipment, is given with the focus on the calcination process, the chemical reactions are performed both in description and chemical formulae, the different methods of obtaining the pigments, depending on the demanded pigment's colour, are offered, and the technical and chemical requirements for the raw material and the pigments' compound are listed.

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Augmented Reality - Principles and Practice 15

Augmented Reality - Principles and Practice

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15th Adjunct IEEE International Symposium on Mixed and Augmented Reality, ISMAR-Adjunct 2016

作者： Schmalstieg, Dieter Höllerer, Tobias Institute for Computer Graphics and Vision Graz University of Technology GrazA-8010 Austria Department of Computer Science University of California Santa Barbara Santa BarbaraCA93106-5110 United States

ISBN: (纸本)9781509037407

The world is becoming more complex and problem solving often requires teams of experts to work together at the same or from different locations. To support this there is a need for collaborative tools, and a variety of teleconferencing and telepresence technologies have been developed. However, most of them involve some variation of traditional video conferencing, which has limitations, such as not being able to effectively convey spatial cues or share the user's task space. This workshop will focus on how these limitations can be overcome by using Mixed Reality (MR) technology, leading to the development of radically new types of collaborative experiences. © 2016 IEEE.

关键词： Video conferencing

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Micromorphology of AlN Epilayers on Sapphire Substrates

Micromorphology of AlN Epilayers on Sapphire Substrates

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2017 International Conference on computer, Electronics and Communication Engineering(CECE2017)

作者： ?tefan ??LU Dinara SOBOLA Pavel TOMáNEK Sebastian STACH Technical University of Cluj-Napoca Faculty of Mechanical Engineering Department of AETDiscipline of Descriptive Geometry and Engineering Graphics Brno University of Technology Faculty of Electrical Engineering and Communication Physics Department University of Silesia Faculty of Computer Science and Materials Science Institute of InformaticsDepartment of Biomedical Computer Systems

The purpose of this paper was to describe the 3 D nano-scaled surface topography of the aluminum nitride on sapphire. The structures were prepared by magnetron sputtering with heating of the sapphire substrate. The dependence of the layers topography on the substrate temperature was presented. Surface appearance was studied by atomic force microscopy(AFM). The quantitative topography data from AFM were used for surface characterization by fractal analysis and statistical parameters. The results of fractal analysis show the correlation of fractal dimension and statistical characteristics of surface topography. The data may contribute to manufacture of AlN thin films with desired surface characteristics.

关键词： Aluminum nitride Atomic force microscopy Fractal analysis Minkowsky functionals Surface micromorphology

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Models of personality and activities of remotely piloted aircraft system's operator 4

Models of personality and activities of remotely piloted air...

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4th IEEE International Conference Methods and Systems of Navigation and Motion Control, MSNMC 2016

作者： Shmelova, T.F. Kovaljov, Y.M. Shostak, O.V. Air Navigation Systems Department National Aviation University Kyiv Ukraine Department of Computer Graphics and Design Technology National Aviation University Kyiv Ukraine

ISBN: (纸本)9781509010530

On the basis of the theory of S-space selforganization, the following have been presented: operator's personality model;classification of psychological (personality) types;means of testing;processing and presentation of results. On the basis of Markov's network decision-making models were proposed taking into consideration the circumstances of various flight situations. On the basis of the reflexive theory of bipolar choice the expected risks of decision-making by the Air Navigation System's operator influence of external environment, previous experience and intention were identified. The methods for analysis of decision-making by the human-operator in Air Navigation System using stochastic networks have been developed. © 2016 IEEE.

关键词： Graph theory

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