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  • 1.
    Bylund, Markus
    et al.
    RISE - Research Institutes of Sweden (2017-2019), ICT, SICS.
    Espinoza, Fredrik
    RISE, Swedish ICT, SICS.
    Testing and demonstrating context-aware services with quake III arena2002In: Communications of the ACM, ISSN 0001-0782, E-ISSN 1557-7317, Vol. 45, no 1, p. 46-48Article in journal (Refereed)
    Abstract [en]

    Testing and demonstrating context aware services can be extremely difficult Context-aware services inherently need information such as the position oftheir users, but it is complicated to gather and supply services with information of that kind. Obviously, one needs to do this when the services are up and running, but it may help to simulate the context information while the services are under development or for demonstration purposes. Even though the simulated context information is not real, the services and the routines that gather and receive the context information can be. This enables systems to be developed with less regard for constraints that stem from using actual sensor technology while also keeping the core functionality of services separate and ready for real-world deployment. One can image two types of simulation tools: those that simulate a set of values as a part of a test suite, and those that allow interactive testing of services in semirealistic circumstances. We have chosen the latter approach because it has the added advantage of allowing us to demonstrate services. QuakeSim is a tool that interactively simulates context information in real time. It simulates the real 3D world and different kinds of context information. With QuakeSim, it is possible to test and demonstrate context-aware services without requiring users or objects to actually be located in and move around in the real world.

  • 2. Kavassalis, Petros
    et al.
    Stelios, Lelis
    Rafea, Mahmoud
    Haridi, Seif
    RISE, Swedish ICT, SICS, Computer Systems Laboratory.
    What makes a Web site popular?2004In: Communications of the ACM, ISSN 0001-0782, E-ISSN 1557-7317, Vol. 47, no 2, p. 50-55Article in journal (Refereed)
  • 3.
    Mottola, Luca
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS. Politecnico di Milano, Italy.
    Whitehouse, Kamin
    University of Virginia, USA.
    Fundamental concepts of reactive control for autonomous drones2018In: Communications of the ACM, ISSN 0001-0782, E-ISSN 1557-7317, Vol. 61, no 10, p. 96-104Article in journal (Refereed)
    Abstract [en]

    Autonomous drones represent a new breed of mobile computing system. Compared to smartphones and connected cars that only opportunistically sense or communicate, drones allow motion control to become part of the application logic. The efficiency of their movements is largely dictated by the low-level control enabling their autonomous operation based on high-level inputs. Existing implementations of such low-level control operate in a timetriggered fashion. In contrast, we conceive a notion of reactive control that allows drones to execute the low-level control logic only upon recognizing the need to, based on the influence of the environment onto the drone operation. As a result, reactive control can dynamically adapt the control rate. This brings fundamental benefits, including more accurate motion control, extended lifetime, and better quality of service in end-user applications. Based on 260+ hours of real-world experiments using three aerial drones, three different control logic, and three hardware platforms, we demonstrate, for example, up to 41% improvements in motion accuracy and up to 22% improvements in flight time.

  • 4.
    Ynnerman, A.
    et al.
    Linköping University, Sweden; Norrköping Visualization Center C, Sweden.
    Rydell, Thomas
    RISE - Research Institutes of Sweden, ICT, Interactive. Interspectral AB, Sweden.
    Antoine, D.
    University College London, UK.
    Hughes, D.
    Interspectral AB, Sweden.
    Persson, A.
    Linköping University, Sweden; Center for Medical Image Science and Visualization, Sweden.
    Ljung, P.
    Linköping University, Sweden; Norrköping Visualization Center C, Sweden.
    Interactive visualization of 3D scanned mummies at public venues2016In: Communications of the ACM, ISSN 0001-0782, E-ISSN 1557-7317, Vol. 59, no 12, p. 72-81Article in journal (Refereed)
    Abstract [en]

    BY COMBINING VISUALIZATION techniques with interactive multi-touch tables and intuitive user interfaces, visitors to museums and science centers can conduct self-guided tours of large volumetric image data. In an interactive learning experience, visitors become the explorers of otherwise invisible interiors of unique artifacts and subjects. Here, we take as our starting point the state of the art in scanning technologies, then discuss the latest research on high-quality interactive volume rendering and how it can be tailored to meet the speci?c demands.

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