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  • Sandberg, Jacob
    et al.
    Lunds Universitet, SWE.
    Lansing, Robert
    University of Arizona, USA.
    Anderberg, Peter
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för hälsa.
    Currow, David
    Cancer Institute NSW, AUS.
    Sundh, Josefin
    Örebro Universitet, SWE.
    Ahmadi, Zainab
    Lunds Universitet, SWE.
    Palmqvist, Sebastian
    Skåne University Hospital, SWE.
    Ekström, Magnus
    Lunds Universitet, SWE.
    Relating Experienced To Recalled breathlessness Observational (RETRO) study: A prospective study using a mobile phone application2019Inngår i: BMJ Open Respiratory Research, ISSN 2052-4439, Vol. 6, nr 1, artikkel-id e000370Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: Breathlessness, the subjective sensation of breathing discomfort, is common and appears in the daily life of people with cardiorespiratory diseases. Physicians often rely on patient's history based on symptom recall. The relation between recalled and experienced breathlessness is still poorly understood. This paper presents the protocol for a study primarily aimed at evaluating the relationship between experienced breathlessness and (1) recalled breathlessness and (2) predicted future breathlessness. Methods: A mobile phone application will be used to collect data during daily life. Medically stable participants, ≥18 years of age with mean daily breathlessness of Numerical Rating Scale (NRS) 3/10 and able to use a mobile phone with internet will rate their breathlessness intensity on a 0-10 NRS prompted the user several times daily for 1 week. Participants will recall their breathlessness each day and week. Multivariable random effects regression models will be used for statistical analyses. Results: Results of the study will be submitted for publication in peer-reviewed journals and presented at relevant conferences. Discussion: This protocol describes a study aimed at investigating previously unknown areas of the experience and recall of breathlessness using a new method of data collection. © 2019 Author(s).

  • Marculescu, Bogdan
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Jabbari, Ramtin
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Molléri, Jefferson Seide
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Perception of Scientific Evidence: Do Industry and Academia Share an Understanding?2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Context: Collaboration depends on communication and upon having a similar understanding of the notions that are being discussed, and a similar appraisal of their value. Existing work seems to show that the collaboration between industry and academia is hampered by a difference in values. In particular, academic work focuses more on generalizing on the basis of existing evidence, while industry prefers to particularize conclusions to individual cases. This has lead to the conclusion that industry values scientific evidence less than academia does. 

    Objective: This paper seeks to re-evaluate that conclusion, and investigate if industry and academia share a definition of scientific evidence. If evidence can be found of competing views, we propose a more finely grained model of empirical evidence and its role in building software engineering knowledge. Moreover, we seek to determine if a more nuanced look the notion of scientific evidence has an influence on how academics and industry practitioners perceive that notion. 

    Method: We have developed a model of key concepts related to understanding empirical evidence in software engineering. An initial validation has been conducted, consisting of a survey of master students, to determine if competing views of evidence exist at that level. The model will be validated by further literature study and semistructured interviews with industry practitioners. 

    Results: We propose a model of empirical evidence in software engineering, and initial validation of that model by means of a survey. The results of the survey indicate that conflicting opinions already exist in the student body regarding the notion of evidence, how trustworthy different sources of evidence and knowledge are, and which sources of evidence and types of evidence are more appropriate in various situations.

    Conclusion: Rather than a difference in how industry and academia value scientific evidence, we see evidence of misunderstanding, of different notions of what constitutes scientific evidence and what strength of evidence is required to achieve specific goals. We propose a model of empirical evidence, to provide a better understanding of what is required in various situations and a better platform for communication between industry and academia.

  • Molléri, Jefferson Seide
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Felderer, Michael
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Mendes, Emilia
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för datalogi och datorsystemteknik. Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Petersen, Kai
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Reasoning about Research Quality Alignment in Software EngineeringInngår i: Journal of Systems and Software, ISSN 0164-1212, E-ISSN 1873-1228Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context: Research quality is intended to assess the design and reporting of studies. It comprises a series of concepts such as methodological rigor, practical relevance, and conformance to ethical standards. Depending on the perspective, different views of importance are given to the conceptual dimensions of research quality.

    Objective: We aim to better understand what constitutes research quality from the perspective of the empirical software engineering community. In particular, we intend to assess the level of alignment between researchers with regard to a conceptual model of research quality.

    Method: We conducted a mixed methods approach comprising an internal case study and a complementary focus group. We carried out a hierarchical voting prioritization based on the conceptual model to collect relative values for importance. In the focus group, we also moderate discussions with experts to address potential misalignment.

    Results: We provide levels of alignment with regard to the importance of quality dimensions in the view of the participants. Moreover, the conceptual model fairly expresses the quality of research but has limitations with regards the structure and description of its components.

    Conclusion: Based on the results, we revised the conceptual model and provided an updated version adjusted to the context of empirical software engineering research. We also discussed how to assess quality alignment in research using our approach, and how to use the revised model of quality to characterize an assessment instrument.

  • Molléri, Jefferson Seide
    et al.
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Petersen, Kai
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    Mendes, Emilia
    Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för datalogi och datorsystemteknik. Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, Institutionen för programvaruteknik.
    An Empirically Evaluated Checklist for Surveys in Software EngineeringInngår i: Information and Software Technology, ISSN 0950-5849, E-ISSN 1873-6025Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context: Over the past decade Software Engineering research has seen a steady increase in survey-based studies, and there are several guidelines providing support for those willing to carry out surveys. The need for auditing survey research has been raised in the literature. Checklists have been used to assess different types of empirical studies, such as experiments and case studies.

    Objective: This paper proposes a checklist to support the design and assessment of survey-based research in software engineering grounded in existing guidelines for survey research. We further evaluated the checklist in the research practice context.

    Method: To construct the checklist, we systematically aggregated knowledge from 12 methodological studies supporting survey-based research in software engineering. We identified the key stages of the survey process and its recommended practices through thematic analysis and vote counting. To improve our initially designed checklist we evaluated it using a mixed evaluation approach involving experienced researchers.

    Results: The evaluation provided insights regarding the limitations of the checklist in relation to its understanding and objectivity. In particular, 19 of the 38 checklist items were improved according to the feedback received from its evaluation. Finally, a discussion on how to use the checklist and what its implications are for research practice is also provided.

    Conclusion: The proposed checklist is an instrument suitable for auditing survey reports as well as a support tool to guide ongoing research with regard to the survey design process.

  • Disputas: 2019-03-27 09:00 J1650, Karlskrona
    Schulte, Jesko
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för strategisk hållbar utveckling.
    Sustainability Risk Management in Product Development Companies - Motivating Change2019Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Both the ecological and social system are systematically degrading, resulting in decreasing capacities to support human civilization. Product development and manufacturing companies play a key role in driving society’s transition towards a sustainable path. Besides moral arguments, the motivation for companies can be expressed as a matter of smart risk management, i.e. avoiding threats and exploiting opportunities. Such sustainability risks can be related to, for example, brand and reputation, legislative change, or attracting top-talented employees. But, more importantly, it is about understanding changes that are inevitable on markets to come. Based on Maxwell’s interactive qualitative research approach and following the structure of the Design Research Methodology, this thesis aims to contribute (i) to knowledge by increasing the conceptual understanding of what sustainability risks are; and (ii) to practice by researching decision-support for how sustainability risks can be managed in a product development company context. The first study reviewed existing literature and identified characteristics of sustainability risks, which make them particularly difficult to manage. A following exploratory and descriptive study investigated companies’ current risk management practices and preconditions for sustainability integration. It showed that the effects of uncertainty from the sustainability transition need to be identified, assessed, and managed in relation to how they can affect objectives anchored in both internal and external stakeholder value creation. In parallel, the Framework for Strategic Sustainable Development was applied as a lens to understand the implications of the sustainability transition for company risk management. This resulted in a new definition, stating that sustainability risks are threats and opportunities that are due to an organization’s contribution or counteraction to society’s transition towards strategic sustainable development. A questionnaire study then investigated some case companies’ challenges and preconditions to build sustainability capabilities. Finally, a workshop method is proposed that aims to support design teams in early sustainable product development. Future research will leverage on the findings to develop and test decision support for how product development companies can manage sustainability risks on different organizational levels in practice to increase competitiveness, while taking leadership in the transition towards a sustainable society.

  • 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 Review2019Inngår i: Entertainment Computing, ISSN 1875-9521, E-ISSN 1875-953X, Vol. 29, s. 75-86Artikkel i tidsskrift (Fagfellevurdert)
    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 Methods2019Inngår i: Education Sciences, ISSN 2227-7102, Vol. 9, nr 1, artikkel-id 30Artikkel i tidsskrift (Fagfellevurdert)
    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-Making2012Inngår i: ECIS 2012 - Proceedings of the 20th European Conference on Information Systems, AIS Electronic Library (AISeL) , 2012, s. 1-14Konferansepaper (Fagfellevurdert)
    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.

  • Disputas: 2019-03-22 13:00 C446, Karlskrona
    Ankre, Rosemarie
    Mittuniversitetet.
    Friluftslivkonflikter i svenska kustlandskap ur ett planerings- och användarperspektiv: Studier av Luleå och Blekinge skärgårdar2019Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [sv]

    Hav och kust har alltid varit viktiga för oss människor. I svenska kustlandskap har boende, infrastruktur och fiskenäring existerat sedan lång tid tillbaka samtidigt som områdena också varit viktiga för nöje och rekreation. Men mellan olika intressen, samt mellan och inom olika användargrupper samt förvaltning, kan det uppstå målkonflikter. Utgångspunkten för den här avhandlingen är att beskriva och analysera eventuella målkonflikter kopplat till friluftsliv utifrån både ett planerings- och ett användarperspektiv genom två fallstudier i Luleå och Blekinge skärgårdar. Friluftslivet är en del av samhället och dess relevans för fysisk och mental återhämtning ger planering och förvaltning av friluftsliv ett ökat politiskt stöd, samtidigt som tidigare forskning visat att friluftsliv är stark i retoriken - men svag i planeringspraktiken. Därför behövs kunskap som kan utveckla planering och förvaltning av friluftsliv i svenska kustlandskap.

    Resultaten från den här avhandlingen visar att användarnas perspektiv på målkonflikter i Luleå och Blekinge skärgårdar ännu inte till stora delar har inkluderats i den kommunala planeringen. En slutsats är alltså att det finns skillnader i hur konflikter i samband med friluftsliv beskrivs och identifieras i den fysiska planeringen jämfört med användarnas upplevelser. Det har betydelse för förståelsen av friluftlivskonflikter och hanteringen av dessa. Förutom analys och diskussion av konflikter kopplat till friluftsliv, ingår en fördjupande studie av buller och tystnad som konflikt. Upplevelserna av lugn och ro samt tystnad är centrala för användarna i Luleå och Blekinge skärgårdar. Ett problem som avslöjas är att metoder med decibelnivåer inte avgör skillnader i buller som upplevelse i sig. Upplevelsen av buller och tystnad är nämligen subjektiv. Även zonering undersöks som ett planerings- och förvaltningsverktyg för att hantera friluftslivkonflikter i svenska kustlandskap. Som denna avhandling visar, finns det flertalet exempel på olika sorters zonering i Luleå och Blekinge skärgårdar. När man i planering och förvaltning utgår från ett perspektiv där naturvård och bevarande är utgångspunkterna, så måste ytterligare värderingar och verktyg inbegripas som att inkludera användare med deras olika behov, upplevelser och aktiviteter som äger rum i skärgårdarnas landskap. Att landskapet i sig är av betydelse syns också i resultaten. I fallstudiernas översiktsplaner markeras det värdefulla, attraktiva och unika med skärgårdslandskapet, medan användarna betonar det äkta, naturliga och opåverkade landskapet som grund för deras friluftsupplevelser.

    Den här avhandlingen tillför kunskap om spänningen mellan olika attityder och synsätt i den fysiska planeringens processer, förvaltning samt friluftslivets användare i svenska kustlandskap. Avhandlingen är också ett tillägg till tidigare kunskap om zonering som ett sätt att hantera konflikter i svenska kustlandskap, där särskilt användarperspektivet är en viktig del. Avhandlingen bidrar även till en grundläggande översikt av fysisk planering i relation till friluftsliv.

  • 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 Lab2019Konferansepaper (Fagfellevurdert)
    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 Structures2019Inngår i: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, nr 3, artikkel-id 568Artikkel i tidsskrift (Fagfellevurdert)
    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 Sweden2018Inngår i: Journal of Housing for the Elderly, ISSN 0276-3893, E-ISSN 1540-353XArtikkel i tidsskrift (Fagfellevurdert)
    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 ExtensionsInngår i: Artikkel i tidsskrift (Annet vitenskapelig)
    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 ToriInngår i: Mathematica Scandinavica, ISSN 0025-5521, E-ISSN 1903-1807Artikkel i tidsskrift (Annet vitenskapelig)
    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.