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  • Jerčić, Petar
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för kreativa teknologier.
    Sundstedt, Veronica
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för kreativa teknologier.
    Practicing Emotion-Regulation Through Biofeedback on the Decision-Making Performance in the Context of Serious Games: a Systematic Review2019Ingår i: Entertainment Computing, ISSN 1875-9521, E-ISSN 1875-953X, Vol. 29, s. 75-86Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Evidence shows that emotions critically influence human decision-making. Therefore, emotion-regulation using biofeedback has been extensively investigated. Nevertheless, serious games have emerged as a valuable tool for such investigations set in the decision-making context. This review sets out to investigate the scientific evidence regarding the effects of practicing emotion-regulation through biofeedback on the decision-making performance in the context of serious games. A systematic search of five electronic databases (Scopus, Web of Science, IEEE, PubMed Central, Science Direct), followed by the author and snowballing investigation, was conducted from a publication's year of inception to October 2018. The search identified 16 randomized controlled experiment/quasi-experiment studies that quantitatively assessed the performance on decision-making tasks in serious games, involving students, military, and brain-injured participants. It was found that the participants who raised awareness of emotions and increased the skill of emotion-regulation were able to successfully regulate their arousal, which resulted in better decision performance, reaction time, and attention scores on the decision-making tasks. It is suggested that serious games provide an effective platform validated through the evaluative and playtesting studies, that supports the acquisition of the emotion-regulation skill through the direct (visual) and indirect (gameplay) biofeedback presentation on decision-making tasks.

  • Bertoni, Alessandro
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för maskinteknik.
    A Reverse Engineering Role-Play to Teach Systems Engineering Methods2019Ingår i: Education Sciences, ISSN 2227-7102, Vol. 9, nr 1, artikel-id 30Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Students engaged in systems engineering education typically lack experience and understanding of the multidisciplinary complexity of systems engineering projects. Consequently, students struggle to understand the value, rationale, and usefulness of established systems engineering methods, often perceiving them as banal or trivial. The paper presents a learning activity based on a three-stage reverse engineering role-play developed to increase students’ awareness of the importance of correctly using systems engineering methods. The activity was developed and integrated in the Systems Engineering course given at Blekinge Institute of Technology. Its effectiveness was analyzed through semistructured self-reflection reports along with two editions of the course. The results showed the development of students’ understanding of how to use systems engineering methods. In particular, the students realized the need to deliver detailed and easy-to-read models to the decision makers. This result was in line with the achievement of some of the intended learning outcomes of the course.

  • Jerčić, Petar
    et al.
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Astor, Philipp J
    FZI Forschungszentrum Informatik, DEU.
    Adam, Marc
    Karlsruhe Institute of Technology, DEU.
    Hilborn, Olle
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Schaff, Kristina
    FZI Forschungszentrum Informatik, DEU.
    Lindley, Craig
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Sennersten, Charlotte
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Eriksson, Jeanette
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    A Serious Game using Physiological Interfaces for Emotion Regulation Training in the context of Financial Decision-Making2012Ingår i: ECIS 2012 - Proceedings of the 20th European Conference on Information Systems, AIS Electronic Library (AISeL) , 2012, s. 1-14Konferensbidrag (Refereegranskat)
    Abstract [en]

    Research on financial decision-making shows that traders and investors with high emotion regulation capabilities perform better in trading. But how can the others learn to regulate their emotions? ‘Learning by doing’ sounds like a straightforward approach. But how can one perform ‘learning by doing’ when there is no feedback? This problem particularly applies to learning emotion regulation, because learners can get practically no feedback on their level of emotion regulation. Our research aims at providing a learning environment that can help decision-makers to improve their emotion regulation. The approach is based on a serious game with real-time biofeedback. The game is settled in a financial context and the decision scenario is directly linked to the individual biofeedback of the learner’s heart rate data. More specifically, depending on the learner’s ability to regulate emotions, the decision scenario of the game continuously adjusts and thereby becomes more (or less) difficult. The learner wears an electrocardiogram sensor that transfers the data via Bluetooth to the game. The game itself is evaluated at several levels.

  • Mehri, Vida. A.
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för datalogi och datorsystemteknik.
    Ilie, Dragos
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för datalogi och datorsystemteknik.
    Tutschku, Kurt
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för datalogi och datorsystemteknik.
    Designing a Secure IoT System Architecture from a Virtual Premise for a Collaborative AI Lab2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    IoT systems are increasingly composed out of flexible, programmable, virtualised, and arbitrarily chained IoT elements and services using portable code. Moreover, they might be sliced, i.e. allowing multiple logical IoT systems (network + application) to run on top of a shared physical network and compute infrastructure. However, implementing and designing particularly security mechanisms for such IoT systems is challenging since a) promising technologies are still maturing, and b) the relationships among the many requirements, technologies and components are difficult to model a-priori.

    The aim of the paper is to define design cues for the security architecture and mechanisms of future, virtualised, arbitrarily chained, and eventually sliced IoT systems. Hereby, our focus is laid on the authorisation and authentication of user, host, and code integrity in these virtualised systems. The design cues are derived from the design and implementation of a secure virtual environment for distributed and collaborative AI system engineering using so called AI pipelines. The pipelines apply chained virtual elements and services and facilitate the slicing of the system. The virtual environment is denoted for short as the virtual premise (VP). The use-case of the VP for AI design provides insight into the complex interactions in the architecture, leading us to believe that the VP concept can be generalised to the IoT systems mentioned above. In addition, the use-case permits to derive, implement, and test solutions. This paper describes the flexible architecture of the VP and the design and implementation of access and execution control in virtual and containerised environments. 

  • Wen, Wei
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för teknik och estetik. Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för kreativa teknologier.
    Khatibi, Siamak
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för teknik och estetik.
    Kajínek, Ondřej
    Czech Technical University, CZE.
    Chadzitaskos, Goce
    Czech Technical University, CZE.
    A Common Assessment Space for Different Sensor Structures2019Ingår i: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, nr 3Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The study of the evolution process of our visual system indicates the existence of variational spatial arrangement; from densely hexagonal in the fovea to a sparse circular structure in the peripheral retina. Today’s sensor spatial arrangement is inspired by our visual system. However, we have not come further than rigid rectangular and, on a minor scale, hexagonal sensor arrangements. Even in this situation, there is a need for directly assessing differences between the rectangular and hexagonal sensor arrangements, i.e., without the conversion of one arrangement to another. In this paper, we propose a method to create a common space for addressing any spatial arrangements and assessing the differences among them, e.g., between the rectangular and hexagonal. Such a space is created by implementing a continuous extension of discrete Weyl Group orbit function transform which extends a discrete arrangement to a continuous one. The implementation of the space is demonstrated by comparing two types of generated hexagonal images from each rectangular image with two different methods of the half-pixel shifting method and virtual hexagonal method. In the experiment, a group of ten texture images were generated with variational curviness content using ten different Perlin noise patterns, adding to an initial 2D Gaussian distribution pattern image. Then, the common space was obtained from each of the discrete images to assess the differences between the original rectangular image and its corresponding hexagonal image. The results show that the space facilitates a usage friendly tool to address an arrangement and assess the changes between different spatial arrangements by which, in the experiment, the hexagonal images show richer intensity variation, nonlinear behavior, and larger dynamic range in comparison to the rectangular images.

  • Berglund Snodgrass, Lina
    et al.
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för fysisk planering.
    Nord, Catharina
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för fysisk planering.
    The Continuation of Dwelling: Safety as a Situated Effect of Multi-Actor Interactions Within Extra-Care Housing in Sweden2018Ingår i: Journal of Housing for the Elderly, ISSN 0276-3893, E-ISSN 1540-353XArtikel i tidskrift (Refereegranskat)
    Abstract [en]

    This article examines the space–time situatedness of residing within extra-care housing (ECH) in Sweden. EHC constitutes an example of ordinary housing but is often categorized, along with senior housing, as “in-between housing.” What differentiates the extra-care housing from the ordinary is an age limit for moving in, the provision of communal facilities, and the presence of staff at certain times each week. Two housings with different environmental and architectural conditions have been analyzed through spatial analyses, observations, and interviews with residents (n = 18). The article concludes that the two different assemblings enabled two very different possibilities for accessing “safe aging.” One offered opportunities for the continuation of identities which contributed to feelings of safety, and one demanded the reconstitution of identities for developing meaning in the new housing.

  • Wagner, Stefan
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för matematik och naturvetenskap.
    Secondary Characteristic Classes of Lie Algebra ExtensionsIngår i: Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    We introduce a notion of secondary characteristic classes of Lie algebra extensions. As a spin-off of our construction we obtain a new proof of Lecomte’s generalization of the Chern–Weil homomorphism.

  • Wagner, Stefan
    et al.
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för matematik och naturvetenskap.
    Schwieger, Kay
    iteratec GmbH, GER.
    Noncommutative Coverings of Quantum ToriIngår i: Mathematica Scandinavica, ISSN 0025-5521, E-ISSN 1903-1807Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    We investigate a framework for coverings of noncommutative spaces. Furthermore, we study noncommutative coverings of irrational quantum tori and characterize all such coverings that are connected in a reasonable sense.

  • Sievert, Thomas
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för matematik och naturvetenskap.
    GNSS Radio Occultation Inversion Methods and Reflection Observations in the Lower Troposphere2019Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    GNSS Radio Occultation (GNSS-RO) is an opportunistic Earth sensing technique where GNSS signals passing through the atmosphere are received in low Earth orbit and processed to extract meteorological parameters. As signals are received along an orbit, the measured Doppler shift is transformed to a bending angle profile (commonly referred to as bending angle retrieval), which, in turn, is inverted to a refractivity profile. Thanks to its high vertical resolution and SI traceability, GNSS-RO is an important complement to other Earth sensing endeavors. In the lower troposphere, GNSS-RO measurements often get degraded and biased due to sharp refractive gradients and other complex structures. The main objective of this thesis is to explore contemporary retrieval methods such as phase matching and full spectrum inversion to improve their performance in these conditions. To avoid the bias caused by the standard inversion, we attempt to derive additional information from the amplitude output of the examined retrieval operators. While simulations indicate that such information could be found, it is not immediately straightforward how to achieve this with real measurements. The approach chosen is to examine reflected signal components and their effect on the amplitude output.

  • Klotins, Eriks
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Unterkalmsteiner, Michael
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Gorschek, Tony
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Software Engineering Anti-Patterns in Start-Ups2019Ingår i: IEEE Software, ISSN 0740-7459, E-ISSN 1937-4194Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Software start-up failures are often explained with a poor business model, market issues, insufficient funding, or simply a bad product idea. However, inadequacies in software engineering are relatively unexplored and could be a significant contributing factor to the high start-up failure rate. In this paper we present the analysis of 88 start-up experience reports, revealing three anti-patterns associated with start-up progression phases. The anti-patterns address challenges of releasing the first version of the product, attracting customers, and expanding the product into new markets. The anti-patterns show that challenges and failure scenarios that appear to be business or market related are, at least partially, rooted in engineering inadequacies.