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  • 1.
    Dima, Elijs
    et al.
    Mid Sweden University, Sweden.
    Brunnstrom, Kjell
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems. Mid Sweden University, Sweden.
    Sjöström, Mårten
    Mid Sweden University, Sweden.
    Andersson, Mattias
    Mid Sweden University, Sweden.
    Edlund, Joakim
    Mid Sweden University, Sweden.
    Johansson, Mathias
    Alkit Communications AB, Sweden.
    Qureshi, Tahir
    HIAB AB, Sweden.
    Joint effects of depth‑aiding augmentations and viewing positionson the quality of experience in augmented telepresence2020In: Quality and User Experience, ISSN 2366-0139, Vol. 5, article id 2Article in journal (Refereed)
    Abstract [en]

    Virtual and augmented reality is increasingly prevalent in industrial applications, such as remote control of industrial machinery,due to recent advances in head-mounted display technologies and low-latency communications via 5G. However, theinfluence of augmentations and camera placement-based viewing positions on operator performance in telepresence systemsremains unknown. In this paper, we investigate the joint effects of depth-aiding augmentations and viewing positionson the quality of experience for operators in augmented telepresence systems. A study was conducted with 27 non-expertparticipants using a real-time augmented telepresence system to perform a remote-controlled navigation and positioningtask, with varied depth-aiding augmentations and viewing positions. The resulting quality of experience was analyzed viaLikert opinion scales, task performance measurements, and simulator sickness evaluation. Results suggest that reducing thereliance on stereoscopic depth perception via camera placement has a significant benefit to operator performance and qualityof experience. Conversely, the depth-aiding augmentations can partly mitigate the negative effects of inferior viewingpositions. However the viewing-position based monoscopic and stereoscopic depth cues tend to dominate over cues basedon augmentations. There is also a discrepancy between the participants’ subjective opinions on augmentation helpfulness,and its observed effects on positioning task performance.

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  • 2.
    Gaissmaier, Miriam
    et al.
    KTH Royal Institute of Technology, Sweden.
    Karlsson, Anna
    BORIS Design Studio, Sweden.
    Aschan Eriksson, Sofie
    BORIS Design Studio, Sweden.
    Kosmack Vaara, Elsa
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Komazec, Ksenija
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Ferneaus, Ylva
    KTH Royal Institute of Technology, Sweden.
    Designing for Workplace Safety: Exploring Interactive Textiles as Personal Alert Systems2020In: Proceedings of the Fourteenth International Conference on Tangible, Embedded, and Embodied Interaction, Association for Computing Machinery , 2020, p. 53-65Conference paper (Refereed)
    Abstract [en]

    Despite various safety regulations and procedures, work accidents remain a significant problem in the global process industry and the Swedish steel industry. To address personal safety and safety culture, wearable alert systems were prototyped and tested with steelworkers in iterative workshops. A resulting design concept, in the form of an interactive textile patch worn on the protective gear, suggests a simple way of transmitting personal alerts using light. A crucial design factor identified is to enable the communication between workers and peers as well as communicating with control room staff. The visual design can positively influence the acceptance of the patch, but its impact on the safety culture cannot yet be assessed. The present study contributes by approaching workplace safety and culture with a new design concept of IoT and e-textile technologies based on the interaction modalities of light, sound, and vibration

  • 3.
    Hagspiel, Verena
    et al.
    NTNU Norwegian University of Science and Technology, Norway.
    Huisman, Kuno
    Tilburg University, Netherlands; ASML Netherlands BV, Netherlands.
    Kort, Peter
    Tilburg University, Netherlands; University of Antwerp, Belgium.
    Lavrutich, Maria
    NTNU Norwegian University of Science and Technology, Norway.
    Nunes, Claudia
    Instituto Superior Técnico, Portugal.
    Pimentel, Rita
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems. Instituto Superior Técnico, Portugal.
    Technology adoption in a declining market2020In: European Journal of Operational Research, ISSN 0377-2217, E-ISSN 1872-6860Article in journal (Refereed)
    Abstract [en]

    Rapid technological developments are inducing the shift in consumer demand from existing products towards new alternatives. When operating in a declining market, the profitability of incumbent firms is largely dependent on the ability to correctly time the introduction of product innovations. This paper contributes to the existing literature on technology adoption by determining the optimal time to innovate in the context of a declining market. We study the problem of a firm that has an option to undertake the innovation investment and thereby either to add a new product to its portfolio (add strategy) or to replace the established product by the new one (replace strategy). We find that it can be optimal for the firm to innovate not only because of the significant technological improvement, but also due to demand saturation. In the latter case profits of the established product may become so low that the firm will adopt a new technology even if the newest available innovation has not improved for some time. This way, our approach allows to explicitly account for the effect of a decline in the established market on technology adoption. Furthermore, we find that a substantial cannibalization effect occurring under the add strategy results in an inaction region. In this region the firm waits with innovation until the current technology level becomes either low enough to apply the add strategy, or the new technology becomes advanced enough to apply the replace strategy. 

  • 4.
    Larsson, Stig
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Harlin, Ulrika
    RISE Research Institutes of Sweden, Materials and Production, Product Realisation Methodology.
    Winzenburg, Susanna
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Edström, Adam
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. RISE Research Institutes of Sweden, Digital Systems, Prototyping Society.
    Färdplan: Teknik, material och förmågor för hållbar industriell konkurrenskraft2020Report (Other academic)
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  • 5.
    Larsson, Stig
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Harlin, Ulrika
    RISE Research Institutes of Sweden, Materials and Production, Product Realisation Methodology.
    Winzenburg, Susanna
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Edström, Adam
    RISE Research Institutes of Sweden, Digital Systems, Prototyping Society.
    Färdplan: Teknik, material och förmågor för hållbar industriell konkurrenskraft (Broschyr)2020Other (Other academic)
    Abstract [sv]

    De närmaste 15 åren kommer svenskindustri att med förnyad kraft fortsätta sin digitala omställning, ta tillsig en rad nya material, utveckla nyaaffärsmodeller och öka sin transformationsförmåga. Allt för att stärkasin konkurrenskraft, i symbios medhållbarhet – ekonomisk, ekologisk ochsocial. Coronapandemin medför förvisso enorma utmaningar för industrin,men efter den akuta kris hanteringenkommer med all sannolikhetindustriomställningen att ta ny fart.

    Denna broschyr är en förkortad sammanställning av RISE rapport 2020:46 som finns på länken:http://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-44978

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  • 6.
    Pang, Xiaodan
    et al.
    KTH Royal Institute of Technology, Sweden.
    Ozolins, Oskars
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Lin, Rui
    Chalmers University of Technology, Sweden.
    Zhang, L.
    Shanghai Jiao Tong University, China.
    Udalcovs, Aleksejs
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Xue, L.
    Chalmers University of Technology, Sweden.
    Schatz, R.
    KTH Royal Institute of Technology, Sweden.
    Westergren, U.
    KTH Royal Institute of Technology, Sweden.
    Xiao, S.
    Shanghai Jiao Tong University, China.
    Hu, W.
    Shanghai Jiao Tong University, China.
    Jacobsen, Gunnar
    RISE Research Institutes of Sweden.
    Popov, S.
    KTH Royal Institute of Technology, Sweden.
    Chen, J.
    Chalmers University of Technology, Sweden.
    200 Gbps/lane IM/DD Technologies for Short Reach Optical Interconnects2020In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 38, no 2Article in journal (Refereed)
    Abstract [en]

    Client-side optics are facing an ever-increasing upgrading pace, driven by upcoming 5G related services and datacenter applications. The demand for a single lane data rate is soon approaching 200 Gbps. To meet such high-speed requirements, all segments of traditional intensity modulation direct detection (IM/DD) technologies are being challenged. The characteristics of electrical and optoelectronic components, and the performance of modulation, coding and digital signal processing (DSP) techniques are being stretched to their limits. In this context, we witnessed technological breakthroughs in several aspects, including development of broadband devices, novel modulation formats and coding, and high-performance DSP algorithms for the past few years. A great momentum has been accumulated to overcome the aforementioned challenges. In this paper, we focus on IM/DD transmissions, and provide an overview of recent research and development efforts on key enabling technologies for 200 Gbps per lane and beyond. Our recent demonstrations of 200 Gbps short-reach transmissions with 4-level pulse amplitude modulation (PAM) and discrete multitone signals are also presented as examples to show the system requirements in terms of device characteristics and DSP performance. Apart from digital coherent technologies and advanced direct detection systems, such as Stokes-vector and Kramers-Kronig schemes, we expect high-speed IM/DD systems will remain advantageous in terms of system cost, power consumption and footprint for short reach applications in the short- to mid- term perspective.

  • 7.
    Persson, Hans Lennart
    et al.
    Linköping University, Sweden.
    Lyth, Johan
    Linköping University, Sweden.
    Lind, Leili
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems. Linköping University, Sweden.
    The health diary telemonitoring and hospital-based home care improve quality of life among elderly multimorbid copd and chronic heart failure subjects2020In: The International Journal of Chronic Obstructive Pulmonary Disease, ISSN 1176-9106, E-ISSN 1178-2005, Vol. 15, p. 527-541Article in journal (Refereed)
    Abstract [en]

    Background: Elderly, multimorbid patients with advanced chronic obstructive pulmonary disease (COPD) and/or chronic heart failure (CHF) exhibit poor health-related quality of life (HRQoL). Telemonitoring, based on digital pen technology, supported by hospital-based home care (HBHC) significantly reduces the number of hospitalizations. We hypothesized that the same intervention would prevent the deterioration of HRQoL that follows upon disease progression. Methods: Elderly computer-illiterate subjects with ≥2 hospitalizations the previous year were included. HRQoL was assessed at inclusion (baseline) and at 1, 6 and 12 months employing EuroQol-5 Dimensions (EQ-5D) and RAND-36 for general HRQoL, and Minnesota Living with Heart Failure Questionnaire (MLHFQ) and St. Georges Respiratory Questionnaire (SGRQ) for disease-specific HRQoL. Healthcare contacts, hospitalizations, as-needed medications, prescription changes and healthcare costs were registered. Results: Ninety-four patients were enrolled of which 53 subjects completed the 12-month study period. Compared to baseline, most domains of RAND-36 were improved significantly at 1 time-point or more. Only among COPD subjects, the disease-specific HRQoL was worsened at the 12 month evaluation. Measures of healthcare dependency were associated with poor HRQoL. Conclusion: The Health Diary system and HBHC together improve general HRQoL, and measures of healthcare dependency are associated with HRQoL variables. © 2020 Persson et al.

  • 8.
    Rosa, P.
    et al.
    National Institute of Telecommunications, Poland.
    Rizzelli, G.
    Politecnico di Torino, Italy.
    Pang, Xiaodan
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Ozolins, Oskars
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems. KTH Royal Institute of Technology, Sweden.
    Udalcovs, Aleksejs
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Tan, M.
    Aston University, UK.
    Jaworski, M.
    National Institute of Telecommunications, Poland.
    Marciniak, M.
    National Institute of Telecommunications, Poland.
    Sergeyev, S.
    Aston University, UK.
    Schatz, R.
    KTH Royal Institute of Technology, Sweden.
    Jacobsen, G
    RISE Research Institutes of Sweden.
    Popov, S.
    KTH Royal Institute of Technology, Sweden.
    Ania-Castañón, J. D.
    CSIC The Spanish National Research Council, Spain.
    Unrepeatered 240-km 64-QAM transmission using distributed raman amplification over SMF fiber2020In: Applied Sciences, E-ISSN 2076-3417, Vol. 10, no 4, article id 1433Article in journal (Refereed)
    Abstract [en]

    We present a theoretical and experimental investigation of unrepeatered transmission over standard single-mode fiber (SMF-28) using several schemes of distributed Raman amplification, including first, second, and dual order. In order to further extend the transmission distance, we utilize advanced bidirectional higher-order ultra-long Raman fiber laser-based amplification, where we use fiber Bragg gratings (FBGs) to reflect Stokes-shifted light from the secondary pumps. Our work demonstrates the possibility of transmission up to 240-km span length with a total span loss of 52.7 dB. Here, we use a 28-Gbaud signal using a 64-quadrature amplitude modulation (QAM) modulation format. Our results highlight the contribution of nonlinear compensation using digital back propagation in a digital signal processor (DSP) code at the receiver. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

  • 9.
    van Kasteren, Anouk
    et al.
    RISE Research Institutes of Sweden. Eindhoven University of Technology, Netherlands.
    Brunnstrom, Kjell
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems. Mid Sweden University, Sweden.
    Hedlund, John
    RISE Research Institutes of Sweden, Digital Systems, Prototyping Society.
    Snijders, Chris
    University of Technology Eindhoven, Netherlands.
    Quality of Experience Assessment of 360-degree video2020In: Human Vision and Electronic Imaging 2020 / [ed] Chandler, D.M. McCourt, M. Mulligan, J.B., Burlingame, CA, USA, 2020, article id HVEI-091Conference paper (Refereed)
    Abstract [en]

    The research domain on the Quality of Experience (QoE) of 2Dvideo streaming has been well established. However, a new videoformat is emerging and gaining popularity and availability: VR 360-degree video. The processing and transmission of 360-degree videosbrings along new challenges such as large bandwidth requirementsand the occurrence of different distortions. The viewing experienceis also substantially different from 2D video, it offers moreinteractive freedom on the viewing angle but can also be moredemanding and cause cybersickness. Further research on the QoEof 360-videos specifically is thus required. The goal of this study isto complement earlier research by (Tran, Ngoc, Pham, Jung, andThank, 2017) testing the effects of quality degradation, freezing, andcontent on the QoE of 360-videos. Data will be gathered throughsubjective tests where participants watch degraded versions of 360-videos through an HMD. After each video they will answerquestions regarding their quality perception, experience, perceptualload, and cybersickness. Results of the first part show overall ratherlow QoE ratings and it decreases even more as quality is degradedand freezing events are added. Cyber sickness was found not to bean issue.

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