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  • 301.
    Engström, Maria
    et al.
    University of Gävle.
    Scandurra, Isabella
    Centre for eHealth, Uppsala University, Uppsala, Sweden.
    Lindqvist, R
    Ljunggren, B
    Koch, Sabine
    Karolinska University.
    Evaluation of OLD@HOME Virtual Health Record: Staff opinions of the system and satisfaction with work2009In: Telemedicine journal and e-health, ISSN 1530-5627, E-ISSN 1556-3669, Vol. 15, no 1, p. 53-61Article in journal (Refereed)
    Abstract [en]

    The aim of the present research was to study outcomes of use of the OLD@HOME Virtual Health Record with regard to staff opinions about information, communication technology, and satisfaction with work. A quasi-experimental design was used. Staff opinions about the information and communication technology were assessed using a study-specific questionnaire at the test site (n =22) and at other settings in the municipality (n =172). Staff (n =22) job satisfaction, perceived quality of care, and psychosomatic health were assessed using the Satisfaction with Work Questionnaires before and after a 5-month period of testing the technology in an intervention and a comparison group. Staff opinions about the information and communication technology were significantly more positive at the test site compared to other settings in the municipality. For the total scale of quality of care and the factor documentation, there were significant differences in change scores between intervention and comparison groups, with improvements for the comparison group. For job satisfaction and psychosomatic health, there were no differences in change scores between the groups. Participatory design enhances staff opinions about information and communication technology. However, a 5-month test period showed no benefits regarding staff satisfaction with work when compared to a comparison group. On the contrary, the comparison group improved in documentation, and for the intervention group, there was a trend toward deterioration, which may be due to their knowing how to document, but not having time when using both paper-based and electronic systems.

  • 302.
    Eppe, Manfred
    et al.
    International Computer Science Institute, Berkeley, United States.
    Bhatt, Mehul
    University of Bremen, Bremen, Germany.
    A history based approximate epistemic action theory for efficient postdictive reasoning2015In: Journal of Applied Logic, ISSN 1570-8683, E-ISSN 1570-8691, Vol. 13, no 4, p. 720-769Article in journal (Refereed)
    Abstract [en]

    We propose an approximation of the possible worlds semantics (PWS) of knowledge with support for postdiction - a fundamental inference pattern for diagnostic reasoning and explanation tasks in a wide range of real-world applications such as cognitive robotics, visual perception for cognitive vision, ambient intelligence and smart environments. We present the formal framework, an operational semantics, and an analysis of soundness and completeness results therefrom.

    The advantage of our approach is that only a linear number of state-variables are required to represent an agent's knowledge state. This is achieved by modeling knowledge as the history of a single approximate state, instead of using an exponential number of possible worlds like in Kripke semantics. That is, we add a temporal dimension to the knowledge representation which facilitates efficient postdiction. Since we consider knowledge histories, we call our theory h-approximation (HPX).

    Due to the linear number of state variables, HPX features a comparably low computational complexity. Specifically, we show that HPX can solve the projection problem in polynomial (tractable) time. It can solve planning problems in NP, while e.g. for the action language A(k) [48] this is Sigma(P)(2)-complete. In addition to the temporal dimension of knowledge, our theory supports concurrent acting and sensing, and is in this sense more expressive than existing approximations.

  • 303.
    Eppe, Manfred
    et al.
    International Computer Science Institute, Berkeley, United States.
    Bhatt, Mehul
    University of Bremen, Bremen, Germany.
    Approximate postdictive reasoning with answer set programming2015In: Journal of Applied Logic, ISSN 1570-8683, E-ISSN 1570-8691, Vol. 13, no 4, p. 676-719Article in journal (Refereed)
    Abstract [en]

    We present an answer set programming realization of the h-approximation (HPX) theory [8] as an efficient and provably sound reasoning method for epistemic planning and projection problems that involve postdictive reasoning. The efficiency of HPX stems from an approximate knowledge state representation that involves only a linear number of state variables, as compared to an exponential number for theories that utilize a possible-worlds based semantics. This causes a relatively low computational complexity, i.e, the planning problem is in NP under reasonable restrictions, at the cost that HPX is incomplete. In this paper, we use the implementation of HPX to investigate the incompleteness issue and present an empirical evaluation of the solvable fragment and its performance. We find that the solvable fragment of HPX is indeed reasonable and fairly large: in average about 85% of the considered projection problem instances can be solved, compared to a PWS-based approach with exponential complexity as baseline. In addition to the empirical results, we demonstrate the manner in which HPX can be applied in a real robotic control task within a smart home, where our scenario illustrates the usefulness of postdictive reasoning to achieve error-tolerance by abnormality detection in a high-level decision-making task.

  • 304.
    Eppe, Manfred
    et al.
    University of Bremen, Bremen, Germany.
    Bhatt, Mehul
    University of Bremen, Bremen, Germany.
    Narrative based Postdictive Reasoning for Cognitive Robotics2013In: p. 1-8Article in journal (Refereed)
    Abstract [en]

    Making sense of incomplete and conflicting narrative knowledge in the presence of abnormalities, unobservable processes, and other real world considerations is a challenge and crucial requirement for cognitive robotics systems. An added challenge, even when suitably specialised action languages and reasoning systems exist, is practical integration and application within large-scale robot control frameworks.

    In the backdrop of an autonomous wheelchair robot control task, we report on application-driven work to realise postdiction triggered abnormality detection and re-planning for real-time robot control: (a) Narrative-based knowledge about the environment is obtained via a larger smart environment framework; and (b) abnormalities are postdicted from stable-models of an answer-set program corresponding to the robot's epistemic model. The overall reasoning is performed in the context of an approximate epistemic action theory based planner implemented via a translation to answer-set programming.

  • 305.
    Eppe, Manfred
    et al.
    University of Bremen, Bremen, Germany.
    Bhatt, Mehul
    University of Bremen, Bremen, Germany.
    Dylla, Frank
    University of Bremen, Bremen, Germany.
    Approximate Epistemic Planning with Postdiction as Answer-Set Programming2013In: Logic Programming and Nonmonotonic Reasoning: 12th International Conference, LPNMR 2013, Corunna, Spain, September 15-19, 2013. Proceedings / [ed] Pedro Cabalar, Tran Cao Son, Springer , 2013, Vol. 8148, p. 290-303Conference paper (Refereed)
    Abstract [en]

    We propose a history-based approximation of the Possible Worlds Semantics (PWS) for reasoning about knowledge and action. A respective planning system is implemented by a transformation of the problem domain to an Answer-Set Program. The novelty of our approach is elaboration tolerant support for postdiction under the condition that the plan existence problem is still solvable in NP, as compared to ΣP2 for non-approximated PWS of Son and Baral [20]. We demonstrate our planner with standard problems and present its integration in a cognitive robotics framework for high-level control in a smart home.

  • 306.
    Eppe, Manfred
    et al.
    University of Bremen, Bremen, Germany.
    Bhatt, Mehul
    University of Bremen, Bremen, Germany.
    Dylla, Frank
    University of Bremen, Bremen, Germany.
    h-approximation: History-Based Approximation of Possible World Semantics as ASP2013In: p. 1-14Article in journal (Refereed)
    Abstract [en]

    We propose a history-based approximation of the Possible Worlds Semantics (PWS) for reasoning about knowledge and action. A respective planning system is implemented by a transformation of the problem domain to an Answer-Set Program. The novelty of our approach is elaboration tolerant support for postdiction under the condition that the plan existence problem is still solvable in NP, as compared to ΣP2 for non-approximated PWS of Son and Baral [19]. We demonstrate our planner with standard problems and present its integration in a cognitive robotics framework for high-level control in a smart home.

  • 307.
    Erdis, Sahit
    Örebro University, School of Science and Technology.
    Robot-Assisted Hospital Bed Transport2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The controlling of mobile robots has been and still is in the focus of researchers. Fuzzy rule-based controllers are extensively used to control robots. Path planners were created using different search methods finding the shortest  trajectory between two points and thereby avoiding recorded obstacles. The low degree of automation in hospitals promises huge potential for increasing logistical effects by the use of mobile robots. Especially the automated transport of a hospital bed, which manually requires two persons, would release time from transportation activities. The usage of a mobile robot joined to a hospital bed makes controlling considerably harder. This document describes a project accomplished by me in cooperation with RobCab AB. During the project, a path planner was created and controlling strategies to move a mobile robot joined to a hospital bed between two locations was implemented. The controlling strategies are not only based on sensor readings from a laser mounted on the mobile robot and a list of way points provided by a path planner but incorporates also the position of the bed in the environment. The robot adapts its behavior to ensure a safe movement considering the position of the bed which is not only determined by the kinematics of the robot-bed model but also by an external force in the form of a person following the transport (human intelligence). Development was done on the Stage simulator and is intended to be finally transferred to a real robot platform. Tests done in the simulator showed that the implemented methods are applicable to bring the bed to the desired goal taking into account the reaction of the person following the transport.

  • 308.
    Ericsson, Niclas
    et al.
    SICS Swedish ICT, Västerås, Sweden.
    Lennvall, Tomas
    SICS Swedish ICT, Västerås, Sweden.
    Åkerberg, Johan
    ABB AB Corporate Research, Västeras, Sweden.
    Björkman, Mats
    Mälardalen University, School of Innovation, Design and Technology, Västerås, Sweden.
    Challenges from research to deployment of industrial distributed control systems2016In: 2016 IEEE 14th International Conference on Industrial Informatics (INDIN), Institute of Electrical and Electronics Engineers (IEEE), 2016, p. 68-73Conference paper (Refereed)
    Abstract [en]

    A trend in the industrial domain is that the networks are growing and becoming more complex, this is further accelerated by the digitalization trend. In order to address this, there is a need to improve the efficiency when moving between the R&D phases. For example, integrate innovative research findings into industrial systems, shorten time to market, improve product quality and reduce the number of issues. Despite a huge research effort on network simulators and emulators there are still some issues that needs to be addressed. This paper presents challenges that needs to be resolved, in order for the industry to adopt and benefit from using network simulators and emulators. The major challenges streamlining the workflow in and between the different R&D phases while preserving the real-time aspects in the entire industrial distributed control system.

  • 309.
    Ericsson, Niclas
    et al.
    RISE SICS, Västerås, Sweden.
    Lennvall, Tomas
    RISE SICS, Västerås, Sweden.
    Åkerberg, Johan
    ABB AB, Corporate Research, Västerås, Sweden.
    Björkman, Mats
    Mälardalen University, School of Innovation, Design and Technology, Västerås, Sweden.
    Custom simulation of Industrial Wireless Sensor and Actuator Network for improved efficiency during research and development2017In: 2017 22nd IEEE International Conference on Emerging Technologies and Factory Automation (ETFA), Institute of Electrical and Electronics Engineers (IEEE), 2017Conference paper (Refereed)
    Abstract [en]

    Trends like the Cloud, Internet of Things and 5G are pushing for an increase in connectivity, but, introducing a new type of network in an industrial distributed control system is a big investment with high risks. Time to market with sufficient quality is crucial. However, when getting through the Research and Development (R&D) phases, a lot of time is spent on isolated activates, e.g., simulations, collecting requirements, design, coding, debugging, creating testbeds, and performing various tests. Therefore, there is a need to improve efficiency when moving between the R&D phases. For verification and validation of communication software, the most common network evaluation method in industry are real testbeds, mostly since a testbed can be very similar to the deployed system. Testbeds are, however, hard to debug and costly to maintain. Other network evaluation methods like simulators, have some strengths that testbeds are lacking, like repeatability, control over the network, and lower cost. However, code from simulators can seldom be reused, especially in industrial time-sensitive target systems, due to different abstraction levels, run-time behavior and system timing. This paper presents findings from a case study that targets improved efficiency, getting from research theories, to deployed devices in a homogeneous Industrial Wireless Sensor and Actuator Network (IWSAN). We propose a small subset of network simulators features which eases changeability, reuse, and debugging of communication software. The selected simulator features are evaluated with a proof of concept implementation that is customized to a research platform. The findings indicate improved efficiency when moving back and forth between activities in different R&D phases.

  • 310.
    Eriksson, Johan
    Örebro University, School of Science and Technology.
    Gränssnitt för AOD-simulator2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    : Being able to simulate an AOD process (Argon, Oxygen andDecarburization) is possible nowadays with help of software. This kind ofsoftware is used for education andresearch for development of stainless steel.

     

    Kobolde & Partners AB is a company that owns this kind of software. This project will further develop this software to enable users to simulate an AOD process with uncertainty in measurement. This allows scientist to get more knowledge how a process measurement results

  • 311.
    Eriksson, Maria
    Örebro University, School of Science and Technology.
    WEB SERVICES FÖR MOBILAPPLIKATIONER: Utveckling av säkra RESTful web services för mobilapplikationer2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report describes the development of a RESTful web service for mobile applications. The web service makes resources from an existing system called kompetensdatabasen ("the competence database") available. Kompetensdatabasen holds information about the capabilities of consultants and about assignments carried out at the IT consultant business Nethouse AB.

    The web service was developed according to the principles of REST and ROA (Resource Oriented Architecture) which puts focus on making resources available. The resources are made available through the HTTP protocol and the methods associated with it. This means it was designed to use the same technologies as the world wide web. Following these principles when designing the system has been of great importance.

    To make sure that the service does not leak information to competing companies or violate the Personal Data Act some kind of solution for securing the service had to be implemented. A model for authentication was produced to make the system accessible only for employees of the company.

  • 312.
    Fabrizi, Elisabetta
    et al.
    Università di Roma “La Sapienza”.
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Augmenting topology-based maps with geometric information2000In: Proceedings of the 6th international conference on intelligent autonomous systems: IAS, 2000, p. 604-661Conference paper (Refereed)
    Abstract [en]

    Topology-based maps are a new representation of the workspace of a mobile robot based on the topological notions of connectivity and adjacency. In this paper, we show how to enrich a topology-based map with geometric information useful for planning and navigation. Both the topology-based map and this geometric information are automatically extracted from sensor data.

  • 313. Fabrizi, Elisabetta
    et al.
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Behavioral navigation on topology-based maps2000In: Proceedings of the 8th international symposium on robotics with applications, 2000Conference paper (Refereed)
    Abstract [en]

    In order to plan behavior-based navigation strategies, a mobile robot needs information about the connectivity of the space, and about those geometric properties that allow the selection of the adequate behavior in each area. We propose to represent this information by a topology-based map, a graph that encodes the topological structure of the free space in the environment, in which nodes represent large open spaces and arcs represent passages between them. In this paper, we show how to extract a topology-based map from a fuzzy occupancy grid using image processing techniques, and how to use this map for planning behavioral navigation. We illustrate our technique by giving an example of office navigation on a real robot

  • 314. Fabrizi, Elisabetta
    et al.
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Extracting topology-based maps from gridmaps2000In: IEEE international conference on robotics and automation, ICRA '00: proceedings, 2000, p. 2972-2978Conference paper (Refereed)
    Abstract [en]

    We propose topology-based maps as a new representation of the workspace of a mobile robot. These maps capture the structure of the free space in the environment in terms of the basic topological notions of connectivity and adjacency. Topology-based maps can be automatically extracted from an occupancy grid built from sensor data using techniques borrowed from the image processing field. Since these techniques can be soundly defined on fuzzy values, our approach is well suited to deal with the uncertainty inherent in the sensor data. Topology-based maps are fairly robust with respect to sensor noise and to small environmental changes, and have nice computational properties.

  • 315.
    Fan, Han
    et al.
    Örebro University, School of Science and Technology.
    Arain, Muhammad Asif
    Örebro University, School of Science and Technology.
    Hernandez Bennetts, Victor
    Örebro University, School of Science and Technology.
    Schaffernicht, Erik
    Örebro University, School of Science and Technology.
    Lilienthal, Achim J.
    Örebro University, School of Science and Technology.
    Improving Gas Dispersal Simulation For Mobile Robot Olfaction: Using Robotcreatedoccupancy Maps And Remote Gas Sensors In The Simulation Loop2017In: 2017 ISOCS/IEEE International Symposium on Olfaction andElectronic Nose (ISOEN 2017) Proceedings, IEEE conference proceedings, 2017, article id 17013581Conference paper (Refereed)
    Abstract [en]

    Mobile robot platforms equipped with olfaction systems have been used in many gas sensing applications. However, in-field validation of mobile robot olfaction systems is time consuming, expensive, cumbersome and lacks repeatability. In order to address these issues, simulation tools are used. However, the available mobile robot olfaction simulations lack models for remote gas sensors, and the possibility to import geometrical representations of actual real-world environments in a convenient way. In this paper, we describe extensions to an open-source CFD-based filament gas dispersal simulator. These improvements arrow to use robot-created occupancy maps and offer remote sensing capabilities in the simulation loop. We demonstrate the novel features in an example application: we created a 3D map a complex indoor environment, and performed a gas emission monitoring task with a Tunable Diode Laser Absorption Spectroscopy based remote gas sensor in a simulated version of the environment.

  • 316.
    Fan, Han
    et al.
    Örebro University, School of Science and Technology.
    Hernandez Bennetts, Victor
    Örebro University, School of Science and Technology.
    Schaffernicht, Erik
    Örebro University, School of Science and Technology.
    Lilienthal, Achim
    Örebro University, School of Science and Technology.
    A cluster analysis approach based on exploiting density peaks for gas discrimination with electronic noses in open environments2018In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 259, p. 183-203Article in journal (Refereed)
    Abstract [en]

    Gas discrimination in open and uncontrolled environments based on smart low-cost electro-chemical sensor arrays (e-noses) is of great interest in several applications, such as exploration of hazardous areas, environmental monitoring, and industrial surveillance. Gas discrimination for e-noses is usually based on supervised pattern recognition techniques. However, the difficulty and high cost of obtaining extensive and representative labeled training data limits the applicability of supervised learning. Thus, to deal with the lack of information regarding target substances and unknown interferents, unsupervised gas discrimination is an advantageous solution. In this work, we present a cluster-based approach that can infer the number of different chemical compounds, and provide a probabilistic representation of the class labels for the acquired measurements in a given environment. Our approach is validated with the samples collected in indoor and outdoor environments using a mobile robot equipped with an array of commercial metal oxide sensors. Additional validation is carried out using a multi-compound data set collected with stationary sensor arrays inside a wind tunnel under various airflow conditions. The results show that accurate class separation can be achieved with a low sensitivity to the selection of the only free parameter, namely the neighborhood size, which is used for density estimation in the clustering process.

  • 317.
    Fan, Han
    et al.
    Örebro University, School of Science and Technology.
    Hernandez Bennetts, Victor
    Örebro University, School of Science and Technology.
    Schaffernicht, Erik
    Örebro University, School of Science and Technology.
    Lilienthal, Achim J.
    Örebro University, School of Science and Technology.
    Unsupervised gas discrimination in uncontrolled environments by exploiting density peaks2016In: 2016 IEEE SENSORS, Institute of Electrical and Electronics Engineers (IEEE), 2016Conference paper (Refereed)
    Abstract [en]

    Gas discrimination with Open Sampling Systems based on low-cost electro-chemical sensor arrays is of great interest in several applications, such as exploration of hazardous areas and environmental monitoring. Due to the lack of labeled training data or the high costs of obtaining them, as well as the presence of unknown interferents in the target environments, supervised learning is often not applicable and thus, unsupervised learning is an interesting alternative. In this work, we present a cluster analysis approach that can infer the number of different chemical compounds and label the measurements in a given uncontrolled environment without relying on previously acquired training data. Our approach is validated with data collected in indoor and outdoor environments by a mobile robot equipped with an array of metal oxide sensors. The results show that high classification accuracy can be achieved with a rather low sensitivity to the selection of the only functional parameter of our proposed algorithm. 

  • 318.
    Fleck, Sven
    et al.
    University of Tübingen.
    Busch, Florian
    University of Tübingen.
    Biber, Peter
    University of Tübingen.
    Strasser, Wolfgang
    University of Tübingen.
    Andreasson, Henrik
    Örebro University, Department of Technology.
    Omnidirectional 3D modeling on a mobile robot using graph cuts2005In: Proceedings of the 2005 IEEE International Converence on Robotics and Automation: ICRA - 2005, 2005, p. 1748-1754Conference paper (Refereed)
    Abstract [en]

    For a mobile robot it is a natural task to build a 3D model of its environment. Such a model is not only useful for planning robot actions but also to provide a remote human surveillant a realistic visualization of the robot’s state with respect to the environment. Acquiring 3D models of environments is also an important task on its own with many possible applications like creating virtual interactive walkthroughs or as basis for 3D-TV.

    In this paper we present our method to acquire a 3D model using a mobile robot that is equipped with a laser scanner and a panoramic camera. The method is based on calculating dense depth maps for panoramic images using pairs of panoramic images taken from different positions using stereo matching. Traditional 2D-SLAM using laser-scan-matching is used to determine the needed camera poses. To receive high-quality results we use a high-quality stereo matching algorithm – the graph cut method. We describe the necessary modifications to handle panoramic images and specialized post-processing methods.

  • 319.
    Fodor, George
    et al.
    ABB Industrial Systems AB, Västerås, Sweden.
    Grantner, Janos L.
    Western Michigan University, Department of Electrical and Computer Engineering, Kalamazoo, USA.
    Driankov, Dimiter
    Linköping University, Linköping, Sweden.
    Modeling the real-time recovery of complex control systems: A fuzzy approach1997In: 1997 IEEE International Conference on Systems, Man, and Cybernetics: Computational Cybernetics and Simulation (Volume:3), New York, USA: IEEE conference proceedings, 1997, p. 2163-2168Conference paper (Refereed)
    Abstract [en]

    This paper presents an approach to complex system recovery based on a fuzzy specification method. The method can be applied when controllers of different types and makes are connected in a common control architecture. The method allows a controller B to trigger a recovery operation on a controller A when B has the recovery specification of A. The approach has important potential applications in industry, e.g. as a possible complement to PLC standards such as IEC1131, and to the design of hybrid and complex control systems

  • 320.
    Fohler, Gerhard
    et al.
    Departement of Computer Science and Engineering, Mälardalen University, Västerås, Sweden.
    Lennvall, Tomas
    Departement of Computer Science and Engineering, Mälardalen University, Västerås, Sweden.
    Dobrin, Radu
    Departement of Computer Science and Engineering, Mälardalen University, Västerås, Sweden.
    A component based real-time scheduling architecture2003In: Architecting Dependable Systems / [ed] Rogério de Lemos, Cristina Gacek, Alexander Romanovsky, Springer , 2003, p. 110-125Chapter in book (Refereed)
    Abstract [en]

    Functionality for various services of scheduling algorithms is typically provided as extensions to a basic paradigm, intertwined in the kernel architecture. Thus, scheduling services come in packages around single paradigms, fixed to a certain methodology and kernel architecture. Temporal constraints of applications are addressed by a combination of scheduler and system architecture. Consequently, changing system architecture results in a complete rescheduling of all tasks, calling for a new cycle of analysis and testing from scratch, although a schedule meeting all temporal constraints already existed.

    We propose a component based architecture for schedule reuse. Instead of tying temporal constraints, scheduler, and system architecture together, we provide methods which allow for the reuse of existing schedules on various system architectures. In particular, we show how a schedule developed for table driven, dynamic or static priority paradigm can be reused in the other schemes.

    We address an architecture to disentangle actual scheduling from dispatching and other kernel routines with a small interface, suited for a variety of scheduling schemes as components.

  • 321.
    Frennert, Susanne Anna
    et al.
    Department of Design Sciences, Certec, Lund University, Lund, Sweden .
    Forsberg, Anette Susanne
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
    Östlund, Britt
    Department of Design Sciences, Lund University, Lund, Sweden .
    Elderly People's Perceptions of a Telehealthcare System: Relative Advantage, Compatibility, Complexity and Observability2013In: Journal of technology in human services, ISSN 1522-8835, E-ISSN 1522-8991, Vol. 31, no 3, p. 218-237Article in journal (Refereed)
    Abstract [en]

    The use of telehealthcare systems to promote independent living for elderly people is growing. The results presented in this article, derived from an initial user lab test of a telecare system-GiraffPlus-indicate that the crucial factor for adoption of telehealthcare systems is not usability but the system's ability to support autonomy in everyday life. Eleven users tested the usability and reported what they perceived as possible benefits of having such a system at home. To support autonomy, customization is crucial for the system to be perceived as meaningful for the individual. Our analysis confirms previous research. © 2013 Copyright Taylor and Francis Group, LLC.

  • 322. Galindo, Cipriano
    et al.
    Fernandez-Madrigal, Juan-Antonio
    Gonzalez, Javier
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Buschka, Par
    Life-long optimization of the symbolic model of indoor environments for a mobile robot2007In: IEEE transactions on systems, man and cybernetics. Part B. Cybernetics, ISSN 1083-4419, E-ISSN 1941-0492, Vol. 37, no 5, p. 1290-1304Article in journal (Refereed)
    Abstract [en]

    The use of a symbolic model of the spatial environment becomes crucial for a mobile robot. that is intended to operate optimally and intelligently in indoor scenarios. Constructing such a model involves important problems that are not solved completely at present. One is called anchoring, which implies to maintain a correct dynamic correspondence between the real world and the symbols in the model. The other problem is adaptation: among the numerous possible models that could be constructed for representing a given environment, optimization involves the selection of one that improves as much as possible the operations of the robot. To cope with both problems, in this paper, we propose a framework that allows an indoor mobile robot to learn automatically a symbolic model of its environment and to optimize it over time with respect to changes in both the environment and the robot operational needs through an evolutionary algorithm. For coping efficiently with the large amounts of information that the real world provides, we use abstraction, which also helps in improving task planning. Our experiments demonstrate that the proposed framework is suitable for providing an indoor mobile robot with a good symbolic model and adaptation capabilities.

  • 323.
    Galindo, Cipriano
    et al.
    Dept. of System Engineering and Automation, University of Malaga, Spain.
    Fernández-Madrigal, Juan-Antonio
    Dept. of System Engineering and Automation, University of Malaga, Spain.
    González, Javier
    Dept. of System Engineering and Automation, University of Malaga, Spain.
    Saffiotti, Alessandro
    Örebro University, School of Science and Technology.
    Robot Task Planning Using Semantic Maps2008In: Robotics and Autonomous Systems, ISSN 0921-8890, E-ISSN 1872-793X, Vol. 56, no 11, p. 955-966Article in journal (Refereed)
    Abstract [en]

    Task planning for mobile robots usually relies solely on spatial information and on shallow domain knowledge, like labels attached to objects and places. Although spatial information is necessary for performing basic robot operations (navigation and localization), the use of deeper domain knowledge is pivotal to endow a robot with higher degrees of autonomy and intelligence. In this paper, we focus on semantic knowledge, and show how this type of knowledge can be profitably used for robot task planning. We start by defining a specific type of semantic maps, which integrate hierarchical spatial information and semantic knowledge. We then proceed to describe how these semantic maps can improve task planning in two ways: extending the capabilities of the planner by reasoning about semantic information, and improving the planning efficiency in large domains. We show several experiments that demonstrate the effectiveness of our solutions in a domain involving robot navigation in a domestic environment.

  • 324. Galindo, Cipriano
    et al.
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Coradeschi, Silvia
    Örebro University, Department of Technology.
    Buschka, Pär
    Örebro University, Department of Technology.
    Fernández-Madrigal, J. A.
    González, J.
    Multi-hierarchical semantic maps for mobile robotics2005In: 2005 IEEE/RSJ international conference on intelligent robots and systems (IROS 2005), 2005, p. 2278-2283Conference paper (Other academic)
    Abstract [en]

    The success of mobile robots, and particularly of those interfacing with humans in daily environments (e.g., assistant robots), relies on the ability to manipulate information beyond simple spatial relations. We are interested in semantic information, which gives meaning to spatial information like images or geometric maps. We present a multi-hierarchical approach to enable a mobile robot to acquire semantic information from its sensors, and to use it for navigation tasks. In our approach, the link between spatial and semantic information is established via anchoring. We show experiments on a real mobile robot that demonstrate its ability to use and infer new semantic information from its environment, improving its operation.

  • 325.
    Gao, Shang
    et al.
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway.
    Krogstie, John
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway.
    Siau, Keng
    Department of Management, University of Nebraska-Lincoln, Lincoln, NE, USA.
    Developing an instrument to measure the adoption of mobile services2011In: International Journal of Mobile Information Systems, ISSN 1574-017X, E-ISSN 1875-905X, Vol. 7, no 1, p. 45-67Article in journal (Refereed)
    Abstract [en]

    Currently, there is no standard instrument for measuring user adoption of mobile services. Based on the mobile service acceptance model, this paper reports on the development of a survey instrument designed to measure user perception on mobile services acceptance. A survey instrument was developed by using some existing scales from prior instruments and by creating additional items which might appear to fit the construct definitions. In addition, a pilot study was conducted by distributing the survey to 25 users of a mobile service called Mobile Student Information Systems. As a result, a survey instrument containing 22 items were retained. Furthermore, the results showed that the reliabilities of all the scales in the survey instrument were above the target acceptance level.

  • 326.
    Gao, Shang
    et al.
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway.
    Krogstie, John
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway.
    Zang, Zhe
    Zhongnan University of Economics and Law, Wuhan, China.
    The Effect of Flow Experience and Social Norms on the Adoption of Mobile Games in China2016In: International Journal of Mobile Human Computer Interaction, ISSN 1942-390X, E-ISSN 1942-3918, Vol. 8, no 1, p. 83-102Article in journal (Refereed)
    Abstract [en]

    This research examines the potential factors which influence users' intention to play mobile games. Through the employment of structural equation modeling technology, a research model extending the technology acceptance model (TAM) with flow experience and social norms is proposed. This research model was empirically evaluated using survey data collected from 565 users in the largest city in central China. And eleven research hypotheses were proposed. Eight hypotheses were positively supported on a significant level, while three hypotheses were rejected in this study. The result indicated that attitude and flow experience explained about 66% of users' intention to play mobile games. It was found that social norms did not have a direct effect on the intention to play a mobile game. However, it affected the attitude directly. In addition, flow experience, perceived ease of use and perceived usefulness all had direct effects on users' attitudes toward playing a mobile game. The research findings demonstrated that flow experience play an important role in the adoption of mobile games.

  • 327.
    Gao, Shang
    et al.
    School of Business Administration, Zhongnan University of Economics and Law, China.
    Rusu, Lazar
    Stockholm University, Stockholm, Sweden .
    Modern techniques for successful IT project management2015Book (Other academic)
  • 328.
    Garipov, Emil
    et al.
    Technical University of Sofia, Bulgaria.
    Stoilkov, Teodor
    Technical University of Sofia, Bulgaria.
    Kalaykov, Ivan
    Örebro University, Department of Natural Sciences.
    Multiple regressive model adaptive control2008In: New developments in robotics automation and control / [ed] Aleksandar Lazinica, Rijeka, Croatia: InTech , 2008, p. 59-84Chapter in book (Refereed)
  • 329. Gasós, Jorge
    et al.
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Integrating fuzzy geometric maps and topological maps for robot navigation1999Conference paper (Refereed)
    Abstract [en]

    Autonomous mobile robots need to use spatial information about the environment in order to effectively plan and execute navigation tasks. This information can be represented at different level of abstractions, ranging from detailed geometric maps to coarse topological maps. Each level is adequate for some sub-tasks, but not for others. In this paper, we propose to use hybrid maps, patchworks of local metric maps connected into a topological network. Our hybrid maps are peculiar in that they use fuzzy sets to represent the uncertainty that affects metric information. We show how a robot can build hybrid maps from sensor data, and how it can use them in autonomous indoor navigation. We also report experiments performed on a real mobile robot that demonstrate the robustness of our approach with respect to inaccuracies in the map and noise in the sensor data.

  • 330.
    Gasós, Jorge
    et al.
    Université Libre de Bruxelles.
    Saffiotti, Alessandro
    Örebro University, Department of Technology.
    Using fuzzy sets to represent uncertain spatial knowledge in autonomous robots1999In: Spatial Cognition and Computation, ISSN 1387-5868, E-ISSN 1573-9252, Vol. 1, no 3, p. 205-226Article in journal (Refereed)
    Abstract [en]

    Autonomous mobile robots need the capability to reason from and about spatial knowledge. Due to limitations in the prior information and in the perceptual apparatus, this knowledge is inevitably affected by uncertainty. In this paper, we discuss some techniques employed in the field of autonomous robotics to represent and use uncertain spatial knowledge. We focus on techniques which use fuzzy sets to account for the different facets of uncertainty involved in spatial knowledge. These facets include the false measurements induced by bad observation conditions; the inherent noise in odometric position estimation; and the vagueness introduced by the use of linguistic descriptions. To make the discussion more concrete, we illustrate some of these techniques showing samples from our work on mobile robots.

  • 331.
    Gerdin, Johan
    et al.
    Örebro University, School of Science and Technology.
    Heikkinen, Aki
    Örebro University, School of Science and Technology.
    CAMPUS NAVIGATOR: Mobilapplikation för navigering på Campus2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The project exited on creating an application for mobile telephones where the user can orient himself on university campuses, in this case at Örebro University. The aim was to give up the now so the popular GPS system for navigation and to create an entirely new application that shows a video instead of just a point on a map. The application addresses to new students which need to get familiarized in the new environment. It will facilitate for the user to find a given lecture room or a meeting place. In the report, the development of the application is described and drawn conclusions can be read.

  • 332.
    Giaretta, Alberto
    et al.
    Department of Mathematics, University of Padua, Padua, Italy.
    Balasubramaniam, Sasitharan
    Department of Electronic and Communication EngineeringNano Communication Centre, Tampere University of Technology, Tampere, Finland.
    Conti, Mauro
    Department of Mathematics, University of Padua, Padua, Italy.
    Security Vulnerabilities and Countermeasures for Target Localization in Bio-NanoThings Communication Networks2016In: IEEE Transactions on Information Forensics and Security, ISSN 1556-6013, E-ISSN 1556-6021, Vol. 11, no 4, p. 665-676Article in journal (Refereed)
    Abstract [en]

    The emergence of molecular communication has provided an avenue for developing biological nanonetworks. Synthetic biology is a platform that enables reprogramming cells, which we refer to as Bio-NanoThings, that can be assembled to create nanonetworks. In this paper, we focus on specific Bio-NanoThings, i.e, bacteria, where engineering their ability to emit or sense molecules can result in functionalities, such as cooperative target localization. Although this opens opportunities, e.g., for novel healthcare applications of the future, this can also lead to new problems, such as a new form of bioterrorism. In this paper, we investigate the disruptions that malicious Bio-NanoThings (M-BNTs) can create for molecular nanonetworks. In particular, we introduce two types of attacks: blackhole and sentry attacks. In blackhole attack M-BNTs emit attractant chemicals to draw-in the legitimate Bio-NanoThings (L-BNTs) from searching for their target, while in the sentry attack, the M-BNTs emit repellents to disperse the L-BNTs from reaching their target. We also present a countermeasure that L-BNTs can take to be resilient to the attacks, where we consider two forms of decision processes that includes Bayes' rule as well as a simple threshold approach. We run a thorough set of simulations to assess the effectiveness of the proposed attacks as well as the proposed countermeasure. Our results show that the attacks can significantly hinder the regular behavior of Bio-NanoThings, while the countermeasures are effective for protecting against such attacks.

  • 333.
    Giaretta, Alberto
    et al.
    Örebro University, School of Science and Technology.
    Dragoni, Nicola
    Örebro University, School of Science and Technology. DTU Compute, Technical University of Denmark, Lyngby, Denmark.
    Mazzara, Manuel
    Innopolis University, Innopolis, Russian Federation.
    Joining Jolie to Docker: Orchestration of Microservices on a Containers-as-a-Service Layer2018In: Proceedings of 5th International Conference in Software Engineering for Defence Applications: SEDA 2016 / [ed] Ciancarini, P.; Litvinov, S.; Messina, A.; Sillitti, A.; Succi, G., Cham: Springer, 2018, p. 167-175Conference paper (Refereed)
    Abstract [en]

    Cloud computing is steadily growing and, as IaaS vendors have started to offer pay-as-you-go billing policies, it is fundamental to achieve as much elasticity as possible, avoiding over-provisioning that would imply higher costs. In this paper, we briefly analyse the orchestration characteristics of PaaSSOA, a proposed architecture already implemented for Jolie microservices, and Kubernetes, one of the various orchestration plugins for Docker; then, we outline similarities and differences of the two approaches, with respect to their own domain of application. Furthermore, we investigate some ideas to achieve a federation of the two technologies, proposing an architectural composition of Jolie microservices on Docker Container-as-a-Service layer.

  • 334.
    Gil Camacho, Carlos
    Örebro University, School of Science and Technology.
    Part Detection in Oneline-Reconstructed 3D Models.2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis introduces a system to identify objects into a 3D reconstructed

    model. In particular, this is applied to automatize the inspection of an engine

    of a truck by detecting some parts in an online reconstructed 3D model. In this

    way, the work shows how the use of the augmented reality and the computer

    vision can be applied into a real application to automatize a task of inspection.

    To do this, the system employs the Signed Distance Function for the 3D representation

    which has been proven in other research as an efficient method for

    3D reconstruction of environments. Then, some of the common processes for

    the recognition of shapes are applied to identify the pose of a specific part of

    the 3D model.

    This thesis explains the steps to achieve this task. The model is built using

    an industrial robot arm with a depth camera attached to the end effector. This

    allows taking snapshots from different viewpoints that are fused in a same

    frame to reconstruct the 3D model. The path for the robot is generated by

    applying translations to the initial pose of the end effector. Once the model

    is generated, the identification of the part is carried out. The reconstructed

    model and the model to be detected are analysed by detecting keypoints and

    features descriptors. These features can be computed together to obtain several

    instances over the target model, in this case the engine. Last, these instances

    can be filtered by the application of some constrains to get the true pose of the

    object over the scene.

    Last, some results are presented. The models were generated from a real

    engine truck. Then, these models were analysed to detect the oil filters by using

    different keypoint detectors. The results show that the quality of the recognition

    is good for almost all of the cases but it still presents some failures for some

    of the detectors. Keypoints too distinctive are more prune to produce wrong

    registrations due to the differences between the target and the scene. At the

    same time, more constrains make the detection more robust but also make the

    system less flexible.

  • 335.
    Gonzàlez Monroy, Javier
    et al.
    University of Málaga.
    Lilienthal, Achim J.
    Örebro University, School of Science and Technology.
    Blanco, Jose Luis
    University of Almería.
    Gonzàlez Jimenez, Javier
    University of Málaga.
    Trincavelli, Marco
    Örebro University, School of Science and Technology.
    Probabilistic gas quantification with MOX sensors in open sampling systems: a gaussian process approach2013In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 188, p. 298-312Article in journal (Refereed)
    Abstract [en]

    Gas quantification based on the response of an array of metal oxide (MOX) gas sensors in an Open Sampling System is a complex problem due to the highly dynamic characteristic of turbulent airflow and the slow dynamics of the MOX sensors. However, many gas related applications require to determine the gas concentration the sensors are being exposed to. Due to the chaotic nature that dominates gas dispersal, in most cases it is desirable to provide, together with an estimate of the mean concentration, an estimate of the uncertainty of the prediction. This work presents a probabilistic approach for gas quantification with an array of MOX gas sensors based on Gaussian Processes, estimating for every measurement of the sensors a posterior distribution of the concentration, from which confidence intervals can be obtained. The proposed approach has been tested with an experimental setup where an array of MOX sensors and a Photo Ionization Detector (PID), used to obtain ground truth concentration, are placed downwind with respect to the gas source. Our approach has been implemented and compared with standard gas quantification methods, demonstrating the advantages when estimating gas concentrations.

  • 336.
    Goyal, Rohit
    et al.
    Technical University of Denmark, Denmark.
    Dragoni, Nicola
    Örebro University, School of Science and Technology. Embedded Systems Engineering, Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark.
    Why Hackers Love eHealth Applications2016Conference paper (Refereed)
    Abstract [en]

    The tsunami of Internet-of-Things and mobile applications for healthcare is giving hackers an easy way to burrow deeper into our lives as never before. In this paper we argue that this security disaster is mainly due to a lack of consideration by the healthcare IT industry in security and privacy issues. By means of a representative healthcare mobile app, we analyse the main vulnerabilities that eHealth applications should deal with in order to protect user data and related privacy.

  • 337.
    Goyal, Rohit
    et al.
    DTU Compute, Kongens Lyngby, Denmark.
    Dragoni, Nicola
    Örebro University, School of Science and Technology. DTU Compute, Kongens Lyngby, Denmark.
    Spognardi, Angelo
    DTU Compute, Kongens Lyngby, Denmark.
    Mind The Tracker You Wear: A Security Analysis of Wearable Health Trackers2016In: Proceedings of the 31st Annual ACM Symposium on Applied Computing, Association for Computing Machinery (ACM), 2016, p. 131-136Conference paper (Refereed)
    Abstract [en]

    Wearable tracking devices have gained widespread usage and popularity because of the valuable services they offer, monitoring human's health parameters and, in general, assisting persons to take a better care of themselves. Nevertheless, the security risks associated with such devices can represent a concern among consumers, because of the sensitive information these devices deal with, like sleeping patterns, eating habits, heart rate and so on. In this paper, we analyse the key security and privacy features of two entry level health trackers from leading vendors (Jawbone and Fitbit), exploring possible attack vectors and vulnerabilities at several system levels. The results of the analysis show how these devices are vulnerable to several attacks (perpetrated with consumer-level devices equipped with just bluetooth and Wi-Fi) that can compromise users' data privacy and security, and eventually call the tracker vendors to raise the stakes against such attacks.

  • 338.
    Goyal, Rohit
    et al.
    DTU Compute, Technical University of Denmark.
    Spognardi, Angelo
    DTU Compute, Technical University of Denmark.
    Dragoni, Nicola
    Örebro University, School of Science and Technology. DTU Compute, Technical University of Denmark.
    Marios, Argyriou
    DTU Compute, Technical University of Denmark.
    SafeDroid: A Distributed Malware Detection Service for Android2016In: 2016 IEEE 9th International Conference on Service-Oriented Computing and Applications (SOCA), New York: Institute of Electrical and Electronics Engineers (IEEE), 2016, p. 59-66Conference paper (Refereed)
    Abstract [en]

    Android platform has become a primary target for malware. In this paper we present SafeDroid, an open source distributed service to detect malicious apps on Android by combining static analysis and machine learning techniques. It is composed by three micro-services, working together, combining static analysis and machine learning techniques. SafeDroid has been designed as a user friendly service, providing detailed feedback in case of malware detection. The detection service is optimized to be lightweight and easily updated. The feature set on which the micro-service of detection relies on on has been selected and optimized in order to focus only on the most distinguishing characteristics of the Android apps. We present a prototype to show the effectiveness of the detection mechanism service and the feasibility of the approach.

  • 339.
    Grahn, Tomas
    Örebro University, School of Science and Technology. Örebro University, Försvarshögskolan.
    Utökning av funktionaliteten hos och tillägg av en ny typ av test till ett automattestsystem för Ethernet-switchar2009Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report documents my work on a 10 week project performed at Westermo Research and Development AB in Västerås, Sweden, during the spring of 2009. The project consisted of extending the functionality of an automated test system for Westermo's Ethernet switches as well as designing and implementing a new type of test case for said test system. The report is addressed towards readers with knowledge of Ethernet and computer networks, TCP/IP, programming and software testing.

  • 340.
    Grantner, Janos L.
    et al.
    Western Michigan University, Department of Electrical and Computer, Kalamazoo, USA .
    Fodor, George
    ABB Industrial Systems AB, ISY/AMC, Västerås; Western Michigan University, Department of Electrical and Computer, Kalamazoo, USA .
    Driankov, Dimiter
    University of Linköping, Department of Information and Computer Science, Linköping.
    Using fuzzy logic for bounded recovery of autonomous agents1997In: 1997 Annual Meeting of the North American Fuzzy Information Processing Society: NAFIPS, New York, USA: IEEE conference proceedings, 1997, p. 317-322Conference paper (Refereed)
    Abstract [en]

    The solution to the problem of application-independent fault recovery of autonomous agents requires a specification method for the agent's capacity to act outside of its normal operational limits. This paper presents a recovery method based upon the theory of a fuzzy finite state machine. A fuzzy specification is given for the bounds within which an autonomous agent is capable to recover after an unexpected situation has occurred in its environment. It has been shown that the three main components of the recovery problem: fault detection, fault recovery, and the properties of the actuator/sensor gear of an autonomous agent are interrelated. The suggested method can be implemented either by an application-independent software algorithm, or by fuzzy logic hardware

  • 341.
    Grantner, J.L.
    et al.
    Western Michigan University, Kalamazoo, USA.
    Fodor, George
    George Fodor, Al3B Industrial Systems AB, ISY/AMC, Västerås.
    Driankov, Dimiter
    University of Linköping, Linköping.
    Hybrid fuzzy-Boolean automata for ontological controllers1998In: The 1998 IEEE International Conference on Fuzzy Systems Proceedings: IEEE World Congress on Computational Intelligence  (Volume:1), New York, USA: IEEE conference proceedings, 1998, p. 400-404Conference paper (Refereed)
    Abstract [en]

    This paper introduces a hybrid fuzzy-Boolean finite state machine (HFB FSM) model for ontological control. Ontological control is a novel type supervisory control that deals with the problems of error detection and recovery in complex control systems. The HFB FSM is used as a specification method for the problem of recovery when an autonomous control system encounters unexpected changes in its environment. The method allows a controller B (the ontological controller) to trigger a recovery operation on controller A when B has the recovery specification of A. The approach has important potential applications in industry

  • 342.
    Gritti, Marco
    et al.
    Örebro University, School of Science and Technology.
    Saffiotti, Alessandro
    Örebro University, School of Science and Technology.
    A self-configuration mechanism for software components distributed in an ecology of robots2008In: Intelligent Autonomous Systems 10 / [ed] W. Burgard, R. Dillmann, C. Plagemann, N. Vahrenkamp, Amsterdam: IOS press , 2008, p. 100-109Conference paper (Refereed)
    Abstract [en]

    Distributed heterogeneous robotic systems are often organized in component-based software architectures. The strong added value of these systems comes from their potential ability to dynamically self-configure the interactions of their components, in order to adapt to new tasks and unforeseen situations. However, no satisfactory solutions exist to the problem of automatic self-configuration. We propose a self-configuration mechanism where a special component generates, establishes and monitors the system configurations. We illustrate our approach on a distributed robotic system, and show an experiment in which the configuration component dynamically changes the configuration in response to a component failure.

  • 343.
    Grosinger, Jasmin
    et al.
    Örebro University, School of Science and Technology.
    Pecora, Federico
    Örebro University, School of Science and Technology.
    Saffiotti, Alessandro
    Örebro University, School of Science and Technology.
    Making Robots Proactive through Equilibrium Maintenance2016In: 25th International Joint Conference on Artificial Intelligence, 2016Conference paper (Refereed)
  • 344.
    Grosinger, Jasmin
    et al.
    Örebro University, School of Science and Technology.
    Pecora, Federico
    Örebro University, School of Science and Technology.
    Saffiotti, Alessandro
    Örebro University, School of Science and Technology.
    Robots that Maintain Equilibrium: Proactivity by Reasoning About User Intentions and Preferences2018In: Pattern Recognition Letters, ISSN 0167-8655, E-ISSN 1872-7344Article in journal (Refereed)
    Abstract [en]

    Robots need to exhibit proactive behavior if they are to be accepted in human-centered environments. A proactive robot must reason about the actions it can perform, the state of the environment, the state and the intentions of its users, and what the users deem desirable. This paper proposes a computational framework for proactive robot behavior that formalizes the above ingredients. The framework is grounded on the notion of Equilibrium Maintenance: current and future states are continuously evaluated to identify opportunities for acting that steer the system into more desirable states. We show that this process leads a robot to proactively generate its own goals and enact them, and that the obtained behavior depends on a model of user intentions, preferences, and the temporal horizon used in prediction. A number of examples show that our framework accounts for even slight variations in user preference models and perceived user intentions. We also show how the level of informedness of the system is easily customizable.

  • 345.
    Grosinger, Jasmin
    et al.
    Vienna Uni. of Technology, Vienna, Austria.
    Vetere, Frank
    University of Melbourne, Melbourne, Australia.
    Fitzpatrick, Geraldine
    Vienna University of Technology, Vienna, Austria.
    Agile Life: addressing knowledge and social motivations for active aging2012In: Proceedings of the 24th Australian Computer-Human Interaction Conference, Association for Computing Machinery (ACM), 2012, p. 162-165Conference paper (Refereed)
    Abstract [en]

    Despite the inter-relationship between physical, cognitive and social factors for older people, the frequency of physical activity typically decreases with age. In this paper, we focus on two specific issues related to physical activity and older people - overcoming the knowledgebarrier and promoting social motivation. We develop a tablet-based prototype called Agile Life that provides ‘Physical Activity Information Chunks’ (PAICs) and also promotes awareness of friends’ activities and opportunities to join in. The results of a user study, including a think-aloud walkthrough and an adapted technology probe, suggest that the social engagement with friends is a strong motivator but that the content of information chunks need to be carefully tailored to the participant. We provide suggestions for further developing an activity application for this age group.

  • 346.
    Guarino, Donatella
    et al.
    CNR, CNR, ICAR, Palermo, Italy.
    Saffiotti, Alessandro
    Örebro University, School of Science and Technology.
    Monitoring the state of a ubiquitous robotic system: A fuzzy logic approach2007In: 2007 IEEE INTERNATIONAL CONFERENCE ON FUZZY SYSTEMS, VOLS 1-4, 2007, p. 1902-1907Conference paper (Refereed)
    Abstract [en]

    A trend is emerging in the fields of ambient intelligence (AmI) and autonomous robotics, which points in the direction of a merger between these two fields. The inclusion of robotic devices in AmI system, sometimes named ubiquitous robotics, makes one of the hard problems in this field even harder: how can we provide a comfortable, natural interface between the everyday user and a complex system which consists of a large multitude of highly heterogeneous devices? In this paper, we address a specific, important aspect of this problem: to monitor the state of the ubiquitous system by the user of the system. The solution that we propose is based on two mechanisms: an expression-based semantics to represent in a uniform way the status of heterogeneous devices; and a common interface point to aggregate the information from all devices into a summary status presented to the user. For both mechanisms, we propose to use the tools of fuzzy logic. We justify this choice by arguments grounded in the semantics and formal properties of fuzzy logic. We also illustrate our approach on a specific type of ubiquitous robotic system called Ecology of Physically Embedded Intelligent Systems, or PEIS-Ecology.

  • 347.
    Guarino, Donatella
    et al.
    ICAR-CNR, National Council of Research, Palermo, Italy.
    Saffiotti, Alessandro
    Örebro University, School of Science and Technology.
    Using Fuzzy Logic to Monitor the State of an Ubiquitous Robotic System2008In: Journal of Uncertain Systems, ISSN 1752-8909, Vol. 2, no 2, p. 123-132Article in journal (Refereed)
    Abstract [en]

    A trend is emerging in the fields of ambient intelligence (AmI) and autonomous robotics, which points in the direction of a merger between these two fields. The inclusion of robotic devices in AmI system, sometimes named ubiquitous robotics, makes one of the hard problems in this field even harder: how can we provide a comfortable, natural interface between the everyday user and a complex system which consists of a large multitude of highly heterogeneous devices? In this paper, we address a specific, important aspect of this problem: to enable the user of an ubiquitous robotic system to monitor the state of this system in a natural way. The solution that we propose is based on two mechanisms: an expression-based semantics to represent in a uniform way the status of heterogeneous devices; and a common interface point to aggregate the information from all devices into a summary status presented to the user. For both mechanisms, we propose to use the tools of fuzzy logic. We justify this choice by arguments grounded in the semantics and formal properties of fuzzy logic. We also illustrate our approach on a specific type of ubiquitous robotic system called Ecology of Physically Embedded Intelligent Systems, or PEIS-Ecology.

  • 348.
    Guesgen, Hans W.
    et al.
    Massey University, Palmerston North, New Zealand.
    Bhatt, Mehul
    SFB/TR 8 Spatial Cognition, University of Bremen, Germany.
    Advances in Spatial and Temporal Reasoning2010In: Journal of universal computer science (Online), ISSN 0948-695X, E-ISSN 0948-6968, Vol. 16, no 11, p. 1388-1389Article in journal (Refereed)
  • 349.
    Gummus, Fredrik
    Örebro University, School of Science and Technology.
    Utveckling av bokningssystem för Moridge AB2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report describes the development of a new booking system for the company Moridge AB. The booking system is composed of a driver section where drivers can handle their bookings and work schedule as well as an administration section for the management of all drivers and statistics showing customers and drivers bookings. The report goes through the entire development process from system requirements to design planning to the final finished system, and a concluding discussion.

     

    The booking system is a web application for mobile devices developed with ASP.NET MVC Razor and jQuery Mobile. The system consists of a secure login system with a connection to a database using Entity Framework and booking management via Google Calendar API.

     

    The project placed great importance on user experience design (UX) and security. The user interfaces were developed with contemporary technologies and user experience were controlled by user test. Safety is ensured by the use of a powerful cryptographic algorithm for password management and authentication through ASP.NET Identity and Forms Authentication, which limit access to only authorized users.

  • 350.
    Guo, Hong
    et al.
    Anhui University, Hefei, China.
    Gao, Shang
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway .
    Krogstie, John
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway .
    Trætteberg, Hallvard
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway .
    Wang, Alf Inge
    Department of Computer and Information Science, Norwegian University of Science and Technology, Trondheim, Norway .
    An evaluation of ontology based domain analysis for model driven development2015In: International Journal on Semantic Web and Information Systems, ISSN 1552-6283, E-ISSN 1552-6291, Vol. 11, no 4, p. 41-63Article in journal (Refereed)
    Abstract [en]

    Although Domain Analysis DA is important for Model Driven Development MDD, traditional DA methods are demanding and not practical in many situations. When computer games are developed, game design problem domain is usually decided in a gradual way within iterations where software prototypes are constructed and playtest are performed. In such a case, it is not practical to fit a heavyweight DA in the highly iterative process. Researchers indicated that vocabularies were expected to automate game design. Such vocabularies can be reused in another form in DA tasks. In this research, the authors developed an ontology and a DA procedure based on it. To evaluate them, theoretical analysis, case studies, and a user acceptance survey were used. The results indicated that the ontology met the general requirement as a domain vocabulary, and it enhanced the DA process in an expected way. Most of external potential users 46 in total considered the ontology useful and easy to use.

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