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  • 1.
    Belov, Ilia
    et al.
    Jönköping University, Sweden.
    Arwidson, Jonas
    Saab AB, Sweden.
    Poder, Ralf
    RISE - Research Institutes of Sweden.
    Johannesson, Pär
    RISE - Research Institutes of Sweden.
    Leisner, Peter
    RISE - Research Institutes of Sweden. Jönköping University, Sweden.
    Thermal fatigue prediction: consequences of cycle reduction and material property variation2016Ingår i: Electronic Environment, 2016, Vol. 1, s. 27-27Konferensbidrag (Refereegranskat)
  • 2.
    Belov, Ilia
    et al.
    Jönköping University, Sweden.
    Lang, Jenny
    RISE., SP – Sveriges Tekniska Forskningsinstitut.
    Hellén, Johan
    Saab AB, Sweden.
    Lim, Jang-Kwon
    RISE., Swedish ICT, Acreo.
    Schødt, Bo
    RISE., SP – Sveriges Tekniska Forskningsinstitut.
    Nilsson, Torbjörn M. J.
    Saab AB, Sweden.
    Poder, Ralf
    RISE., SP – Sveriges Tekniska Forskningsinstitut.
    Bakowski, Mietek
    RISE., Swedish ICT, Acreo.
    Leisner, Peter
    RISE., SP – Sveriges Tekniska Forskningsinstitut.
    Reliability study of GaN HEMTs2016Konferensbidrag (Övrigt vetenskapligt)
  • 3.
    Bergman, Anders
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    Absolute calibration of a 100 KV DC divider1996Konferensbidrag (Refereegranskat)
    Abstract [en]

    An absolute determination of the ratio of a 100 kV DC divider has been made. A new Zener device that has recently become available has been used in a step-up mode to obtain the divider ratio. The uncertainty of the determination is 5.5 ppm.

  • 4.
    Bergman, Anders
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    Achievable Accuracy in Industrial Measurement of Dissipation Factor of Power Capacitors2018Ingår i: NCSLI Measure, ISSN 1931-5775, Vol. 12, nr 1, s. 34-41Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Modern dielectrics used in power capacitors can exhibit a dissipation factor lower than 0.005 %, which approaches the limits of presently available measurement techniques. This article reviews techniques, apparatus, and available calibration services for dissipation factor with regard to lowest achievable uncertainties. It is shown that further metrological advances are necessary to lower uncertainty in the measurement to levels at least five times less than presently achievable, in order to ensure traceable and quality-assured measurement of modern dielectrics with such low dissipation factors

  • 5.
    Bergman, Anders
    et al.
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    Bergman, Sixten
    Consultant, Rönnvägen 1 A, 507 71 Gånghester, Sweden.
    Hoffmann, Christian
    Baur Gmbh, Austria.
    Paulus, Eberhard
    Baur Gmbh, Austria.
    Elg, Alf Peter
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    Traceable measurement of dielectric dissipation factor at Very Low Frequency2013Konferensbidrag (Refereegranskat)
    Abstract [en]

    Very Low Frequency (VLF) tests are often used for after-laying tests of power cables since the reactive power demand is much lower at VLF than at 50 Hz. In order to augment the usefulness of the test, it is often complemented by a measurement of dielectric dissipation factor (tan ), where the acceptance of the tested object is based on this measurement. A traceability chain for dissipation factor at high voltage and very low frequency has as yet not been recognized by the International Bureau of Weights and Measures (BIPM), which results in difficulties to prove the quality of the measurement. The measurement is complicated by the limited range of the current in the test object that can be resolved by available high voltage test equipment, thus limiting the possible choices of reference systems. A novel reference measuring system that can fulfil these needs has been developed at SP Technical Research Institute of Sweden in the capacity as National Measurement Institute. The traceability of the system to National Standards of Measurement is ensured by careful scientific work and analyses. This measuring system has the ability to measure dissipation factor at 0.1 Hz in the voltage range from 0.5 kV up to 50 kV with an uncertainty better than 0.004 %.

  • 6.
    Bisschop, Roeland
    et al.
    RISE - Research Institutes of Sweden, Säkerhet och transport, Safety.
    Willstrand, Ola
    RISE - Research Institutes of Sweden, Säkerhet och transport, Safety.
    Amon, Francine
    RISE - Research Institutes of Sweden, Säkerhet och transport, Safety.
    Rosenggren, Max
    RISE - Research Institutes of Sweden, Säkerhet och transport, Safety.
    Fire Safety of Lithium-Ion Batteries in Road Vehicles2019Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The demand for lithium-ion battery powered road vehicles continues to increase around the world. As more of these become operational across the globe, their involvement in traffic accidents and fire incidents is likely to rise. This can damage the lithium-ion battery and subsequently pose a threat to occupants and responders as well as those involved in post-crash operations. There are many different types of lithium-ion batteries, with different packaging and chemistries but also variations in how they are integrated into modern vehicles. To use lithium-ion batteries safely means to keep the cells within a defined voltage and temperature window. These limits can be exceeded as a result of crash or fault conditions. This report provides background information regarding lithium-ion batteries and battery pack integration in vehicles. Fire hazards are identified and means for preventing and controlling them are presented. The possibility of fixed fire suppression and detection systems in electric vehicles is discussed.

  • 7.
    Furborg, Joe
    et al.
    RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik.
    Söderberg, Andreas
    RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik.
    Introduction to Hardware Architecture and Evaluation According to EN ISO 13849-12019Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Hardware realization of safety functions, in safety related machinery control systems can, according to EN ISO 13849-1, be realized as one out of five distinct designated architectures. This report gives examples and guidance for choosing a designated architecture which fulfills the required risk reductive measure of the safety function.

  • 8.
    Grönqvist, Hans
    et al.
    RISE - Research Institutes of Sweden, Swerea, Swerea IVF AB.
    Tegehall, Per-Erik
    RISE - Research Institutes of Sweden, Swerea, Swerea IVF AB.
    Lidström, Oscar
    RISE - Research Institutes of Sweden, Swerea, Swerea IVF AB.
    Wünscher, Heike
    CiS Forschungsinstitut für Mikrosensorik GmbH, Germany.
    Steinke, Arndt
    CiS Forschungsinstitut für Mikrosensorik GmbH, Germany.
    Richert, Hans
    SETEK Elektronik AB, Sweden.
    Lagerkvist, Peter
    Niranova AB, Sweden.
    Unit for Investigation of the Working Environment for electronic units in harsh environment2017Ingår i: Advanced Microsystems for Automotive Applications 2017: Smart Systems Transforming the Automobile / [ed] Zachäus, C., Müller, B., Meyer, G., Springer, 2017, s. 13-22Konferensbidrag (Refereegranskat)
    Abstract [en]

    When electronic equipment is used in harsh environments with long expected lifetimethere is a need to understand that environment more in detail. This situationis today a reality for many application areas including the automotive sector,heavy industry, the defense sector and more.To fully understand the working environment a unit has been developed to monitorphysical data such as temperature, vibration, humidity, condensation etc. to beused in the product development phase for new products.The paper presents the underlying principles for the ESU (Environmental SupervisionUnit) and details on the design.

  • 9.
    Hoffmann, Lars
    RISE - Research Institutes of Sweden, Säkerhet och transport, Safety.
    Immersion of 400 volt traction battery in fresh water and salt water2018Rapport (Övrigt vetenskapligt)
    Abstract [en]

    By means of these tests, where Li-ion batteries have been immersed in both fresh water as well as 3 % salt water, it was demonstrated that it is completely safe to be both in the water and in the direct proximity of a battery, in this case, with 400 volt direct current. This conclusion holds, on the condition that the exposed individual, in the direct proximity of the battery, does not actively touch any of the battery's poles. Analogous to this, it can be assumed that nor does an electric vehicle, which for some reason has entered a watercourse consisting of either fresh water or seawater, constitute a danger for those bathing in the immediate vicinity of the electric vehicle. However, this assumes that an individual who is diving or bathing does not touch exposed parts of the traction system (explanation, e.g. open battery case and directly taking hold of live exposed parts of the traction battery and its cells). However, these parts are normally built into the vehicle's protective structures and are hard to access by inadvertent contact. The commercially available, factory produced, electric vehicles made by serious designers and automotive companies have a monitoring system in their systems that immediately switch off the power supply from the traction battery to the electric vehicle's traction system. This provides additional personal protection for anyone (e.g. fireman) who has the task of helping passengers who have entered a watercourse along with their electric vehicle. During immersion in salt water, a pungent chlorine gas was generated, which can be thought to collect inside a vehicle's air pockets; whether these gas mixtures are flammable or not has not been studied during these tests. No drastic events could be observed during any of these tests, however, one should be aware that a battery, which for some reason has been in immersed in water and has not discharged, can still have a hazardous voltage level after many months. This is something that the rescue service, automotive mechanics and car recyclers in particular should be informed.

  • 10.
    Karlsson, Kristian
    et al.
    RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik.
    Toss, Henrik
    RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik.
    Lang, John
    Autoliv, Sweden.
    Costagliola, Francesco
    Volvo Car Corporation, Sweden.
    Zheng, Tian
    Volvo Car Corporation, Sweden.
    Marel, Elias
    Volvo Car Corporation, Sweden.
    HiFi Radar Target: High fidelity soft targets and radar simulation for more efficient testing (real and virtual)2018Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    Radarsensorn på 77 GHz är en vital komponent för ADAS (Advanced Driver Assistance System) samt system för autonom körning (AD) tack vare sin förmåga att detektera och följa objekt på avstånd upp till 200 meter. För att säkerställa hög tillförlitlighet hos fordonets funktioner baserade på radarn krävs omfattande tester med mjuka surrogatmål. Radarresponsen hos ett surrogatmål kan dock skilja sig från det för reella mål, vilket i förlängningen kan orsaka oväntade reaktioner från ADAS- och AD-funktioner i verkliga trafiksituationer. Det första projektmålet var därför att utveckla och validera mjuka surrogatmål så att de blir mer realistiska, ett arbete som utfördes i flera steg: referensmål togs fram och verifierades, metoder för on site kalibrering av radarsensorer utvecklades, och slutligen togs metoder fram för karakterisering av radarmålarea (RCS) av stora objekt på testbana (AstaZero, high speed area). Detta resulterade i flera mätuppställningar och mätprocedurer inklusive osäkerhetsanalys. Nu, med förmågan att utföra repeterbara och pålitliga RCS-mätningar, karakteriserandes ett antal reella mål (verkliga bilar) samt surrogatmål och arbetet med att syntetisera radarmålarean hos surrogatmål genomfördes.

    Stark konkurrens inom bilindustrin och behovet av att validera mer och mer komplexa funktioner (inklusive autonom körning) driver utvecklingen av virtuella testmetoder. Möjligheten att testa ADAS eller AD-funktioner tidigt i utvecklingscykeln kommer att spara tid, kostnad och vara en konkurrensfördel. Dock fanns inga verktyg med kapacitet att utvärdera radarsensorn tillsammans med resten av bilens hård- och mjukvara virtuellt tillgängliga före projektet, vilket var orsaken till det andra målet: ett simuleringsverktyg för ADAS/AD-system inklusive simulering av radarn.

    HiFi Radar Target-projektet (diarienr. 2015-04852) var ett FFI-projekt inom programmet Elektronik, programvara och kommunikation. Efter förlängning blev det ett 30-månaders projekt med start 2015-12-31 och slut datum 2018-06-30. Projektet hade en total budget på 15,9 MSEK.2.1

    Mål

    Utvecklingen av radarsystem, en nödvändig sensor för aktiv säkerhet och autonoma fordon, kräver pålitlig och effektiv testning för validering av systemprestanda. Effektiv utveckling kräver att man tidig upptäcker och löser möjliga problem, något som testinfrastrukturen måste stödja. Målet med projektet var därför att möjliggöra effektiv och tillförlitlig verifiering av radarsystem, inklusive ADAS och AD-system som är beroende av radarsensorer, genom:

    • Utveckling samt validering av repeterbara RCS mätmetoder.
    • Utveckling av mer realistiska surrogatmål för säker provning av bilradarsystem.
    • Utveckling av simuleringsverktyg för radarsystem i virtuell miljö.
    • Demonstration av förbättrad verifiering med hjälp av de utvecklade verktygen och metoderna.
    • Stödja internationell standardisering (ISO) i deras arbete för framtida verifiering och kalibrering av surrogatmål.

    Projektresultaten kommer att:

    • Bidra till nollvisionen, det vill säga noll dödliga trafikolyckor.
    • Stärka svensk bilindustris konkurrenskraft i ett globalt perspektiv.
    • Bidra till att utveckla AstaZero till en testplats i världsklass för ADAS och AD system.
    • Ge verktyg och metoder för AD-testning till VCC.

    Resultat och leveranser

    Målen som beskrivits i föregående kapitel har alla (i olika utsträckning) blivit uppfyllda:

    • Utveckling och validering av noggranna och repeterbara RCS mätmetoder: detta mål uppnåddes mycket väl och konsortiet har arbetat internationellt.
    • Utveckling av mer realistiska surrogatmål för säker provning av bilradarsystem: projektet har fått kunskap om vilka egenskaper som påverkar radarresponsen för ett specifikt mål och har förbättrat surrogatmål inklusive den automatiserade mobila plattform som förflyttar surrogatmålen under test.
    • Utveckling av simuleringsverktyg för virtuell testning av radarsystem: verktygskedjan för trafiksimulering av AD och ADAS funktioner hos VCC har uppdaterats med nya realistiska (mätbaserade) klustermodeller för radarmål. För framtida utveckling definierades också ett interface som möjliggör implementering av nya modeller.
    • Demonstration av metoder framtagna i projektet: projektresultat presenterades och demonstrerades vid AstaZero.
    • Stödja internationell standardisering (ISO) i utvecklingen av metoder för framtida verifiering och kalibrering av surrogatmål: projektet har bidragit till arbetet i ISO genom att öka förståelsen för RCS hos riktiga fordon och surrogatmål, definierat representativa egenskaper hos radarmål, tagit fram metoder för repeterbar och noggrann karakterisering, samt tagit fram en osäkerhetsbudget.
  • 11. Kawahara, J.
    et al.
    Andersson Ersman, Peter
    Wang, X.
    Gustafsson, G.
    Granberg, Hjalmar
    RISE., Innventia.
    Berggren, M.
    Reconfigurable sticker label electronics manufactured from nanofibrillated cellulose-based self-adhesive organic electronic materials2013Ingår i: Organic electronics, ISSN 1566-1199, E-ISSN 1878-5530, nr 11, s. 3061-3069Artikel i tidskrift (Refereegranskat)
  • 12.
    Leong, Miu Yoong
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Larsen, Knud J.
    DTU Technical University of Denmark, Denmark.
    Jacobsen, Gunnar
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Zibar, Darko
    DTU Technical University of Denmark, Denmark.
    Sergeyev, Sergey
    Aston University, UK.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Low-complexity BCH codes with optimized interleavers for DQPSK systems with laser phase noise2017Ingår i: Photonic network communications, ISSN 1387-974X, E-ISSN 1572-8188, Vol. 33, nr 3, s. 328-333Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The presence of high phase noise in addition to additive white Gaussian noise in coherent optical systems affects the performance of forward error correction (FEC) schemes. In this paper, we propose a simple scheme for such systems, using block interleavers and binary Bose–Chaudhuri–Hocquenghem (BCH) codes. The block interleavers are specifically optimized for differential quadrature phase shift keying modulation. We propose a method for selecting BCH codes that, together with the interleavers, achieve a target post-FEC bit error rate (BER). This combination of interleavers and BCH codes has very low implementation complexity. In addition, our approach is straightforward, requiring only short pre-FEC simulations to parameterize a model, based on which we select codes analytically. We aim to correct a pre-FEC BER of around 10 - 3. We evaluate the accuracy of our approach using numerical simulations. For a target post-FEC BER of 10 - 6, codes selected using our method result in BERs around 3× target and achieve the target with around 0.2 dB extra signal-to-noise ratio.

  • 13.
    Li, Shanghua
    et al.
    ABB, Sweden.
    Karlsson, Mattias
    ABB, Sweden.
    Liu, Rongsheng
    ABB, Sweden.
    Ahniyaz, Anwar
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Fornara, Andrea
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Johansson Salazar-Sandoval, Eric
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    The effect of ceria nanoparticles on the breakdown strength of transformer oil2015Ingår i: 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), Institute of Electrical and Electronics Engineers (IEEE), 2015, s. 289-292Konferensbidrag (Refereegranskat)
    Abstract [en]

    Nanotechnologies have potential to be used in transformer industry in enhancing material properties which may lead to a compact design of transformer and reduced manufacturing cost. Effect of adding different nanoparticles such as titania, silica, nano-diamond, etc. has been studied in literatures. In this paper, nano-ceria particles have been successfully added into transformer mineral oil with different content. The suspension is very stable and no segmentation can be observed over several months. The ceria nanoparticles are commercially available, which have a quite narrow size distribution. UV-Vis, TGA and FT-IR are used to characterize the ceria nanofluids. The water content of the ceria nanofluids has been measured by Karl Fisher titration, which is important for the breakdown strength of transformer oil. AC voltage breakdown and lightning impulse voltage breakdown measurements have been performed on the ceria nanofluids. An enhancement of 15% on AC breakdown voltage has been observed on ceria nanofluids with some content compared to reference transformer oil. On the other hand, no clear difference on the lightning impulse breakdown voltage is observed between the ceria nanofluids and reference transformer oil.

  • 14.
    Lobov, Gleb S.
    et al.
    KTH Royal Institute of Technology, Sweden.
    Zhao, Yichen
    KTH Royal Institute of Technology, Sweden.
    Marinins, Aleksandrs
    KTH Royal Institute of Technology, Sweden.
    Yan, Max
    KTH Royal Institute of Technology, Sweden.
    Li, Jiantong
    KTH Royal Institute of Technology, Sweden.
    Toprak, Muhammet Sadaka
    KTH Royal Institute of Technology, Sweden.
    Sugunan, Abhilash
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Thylen, Lars
    Hewlett-Packard Laboratories, US; KTH Royal Institute of Technology, Sweden.
    Wosinski, Lech
    KTH Royal Institute of Technology, Sweden.
    Östling, Mikael
    KTH Royal Institute of Technology, Sweden.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Electro-optical response of P3HT nanofibers in liquid solution2015Ingår i: Asia Communications and Photonics Conference 2015, Optical Society of America, 2015, artikel-id ASu1A.5Konferensbidrag (Refereegranskat)
    Abstract [en]

    AC electric poling introduces in P3HT nanofibers anisotropic electro-optical response and birefringence. Along with birefringence, such material exhibits strong amplitude modulation which makes it more efficient alternative to liquid crystals.

  • 15.
    Ludvigsson, Mikael
    et al.
    RISE - Research Institutes of Sweden.
    Leisner, Peter
    RISE - Research Institutes of Sweden. Jönköping University, Sweden.
    Andersson Ersman, Peter
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Dyreklev, Peter
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Nilsson, Daniel
    RISE - Research Institutes of Sweden.
    Norberg, Björn
    RISE - Research Institutes of Sweden.
    Grund Bäck, Lina
    RISE - Research Institutes of Sweden.
    Malmros, Ingemar
    RISE - Research Institutes of Sweden.
    Falk, Krister
    RISE - Research Institutes of Sweden.
    Clausén, Ulf
    Forserum Saftey Glass AB, Sweden.
    Laminated display based on printed electronics2016Ingår i: Engineered Transparency 2016: Glass in Architecture and Structural Engineering, 2016Konferensbidrag (Refereegranskat)
  • 16.
    Nilsson, Erik
    et al.
    RISE - Research Institutes of Sweden, Material och produktion, IVF.
    Hagström, Bengt
    RISE - Research Institutes of Sweden, Material och produktion, IVF.
    Rössler, Jochen
    University Medical Hospital, Germany.
    Electrically conductive fibres - recent development2016Konferensbidrag (Övrigt vetenskapligt)
  • 17.
    Nord, Stefan
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    HiFi Visual Target - D5.2 Final Report2018Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Advanced Driver Assistance Systems (ADAS) and Autonomous Driving (AD) vehicles rely heavily on sensors for achieving their goal of protecting the driver and passengers from potentially dangerous situations. Optical sensors are used to measure locations and velocities of objects at distances of up to 150 meters. Optical sensors could be cameras (for visible light or IR) used to detect either objects or road features (like e.g. road edges and markings). They are a common choice for high-end ADAS and are found in sensor sets of most AD vehicles.

    To ensure reliable performance of object detection, extensive testing of optical sensors is required. In vehicle testing performed at test tracks like AstaZero, 3D soft car targets are used for safety reasons. However, due to non-perfect shape and materials, the optical characteristics of 3D soft car targets may differ considerably from that of real vehicles in traffic, resulting in different detection performance, and hence different activation of the functions. Moreover, during tests the quality of the 3D soft car targets deteriorates due to repeated impacts and reassembly of the targets, which implies that there is a need of methods for securing the quality of the 3D soft car targets over time.

    By addressing these challenges, the goal of the project has been to contribute to improved testing methods of optical and geometrical characteristics of 3D soft car targets by:

    • developing measurement methods and specifying measurement setups for the optical and geometrical characteristics of 3D soft car targets;
    • developing simplified measurement methods for quality check on 3D soft car targets to secure the quality over time;
    • providing input to international standardization regarding methods for measurement of optical and geometrical characteristics of real and soft car targets.

    The results include test of different measurement methods, different 3D soft car targets as well as real vehicles and also an accelerated ageing test of a 3D soft car target from DRi.

  • 18.
    Nord, Stefan
    et al.
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    Lindgren, Mikael
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    HiFi Visual Target - Methods for Measuring Optical and Geometrical Characteristics of Soft Car Targets for ADAS and AD2017Ingår i: Lecture Notes in Mobility: Smart Systems Transforming the Automobile / [ed] Gereon Meyer, Berlin: Springer, 2017, s. 201-209Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Advanced Driver Assistance Systems (ADAS) and Automated Driving (AD)vehicles rely on a variety of sensors and among them optical sensors. Extensivetesting of functions using optical sensors is required and typically performedat proving grounds like AstaZero. Soft surrogate targets are used for safetyreasons but the optical and geometrical characteristics of soft car targets maydiffer considerably from that of real vehicles. During tests the quality of thesoft car targets deteriorates due to repeated impacts and reassembly of thetargets, and there is a need of methods for securing the quality of the softcar targets over time. One of the main goals of the HiFi Visual Target project isto develop and validate accurate and repeatable measurement methods of theoptical and geometric characteristics of soft car targets.

  • 19.
    Papatheocharous, Efi
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Belk, Marios
    University of Cyprus, Cyprus.
    Germanakos, Panagiotis
    University of Cyprus, Cyprus; SAP AG, Germany.
    Samaras, George
    University of Cyprus, Cyprus.
    Towards implicit user modeling based on artificial intelligence, cognitive styles and web interaction data2014Ingår i: International journal on artificial intelligence tools, ISSN 0218-2130, Vol. 23, nr 2Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A key challenge of adaptive interactive systems is to provide a positive user experience by extracting implicitly the users' unique characteristics through their interactions with the system, and dynamically adapting and personalizing the system's content presentation and functionality. Among the different dimensions of individual differences that could be considered, this work utilizes the cognitive styles of users as determinant factors for personalization. The overarching goal of this paper is to increase our understanding about the effect of cognitive styles of users on their navigation behavior and content representation preference. We propose a Web-based tool, utilizing Artificial Intelligence techniques, to implicitly capture and find any possible relations between the cognitive styles of users and their characteristics in navigation behavior and content representation preference by using their Web interaction data. The proposed tool has been evaluated with a user study revealing that cognitive styles of users have an effect on their navigation behavior and content representation preference. Research works like the reported one are useful for improving implicit and intelligent user modeling in engineering adaptive interactive systems.

  • 20.
    Pelliccione, Patrizio
    et al.
    Chalmers University of Technology, Sweden; University of Gothenburg, Sweden.
    Kobetski, Avenir
    RISE - Research Institutes of Sweden, ICT, SICS.
    Larsson, Tony
    Halmstad University, Sweden.
    Aramrattana, Maytheewat
    Halmstad University, Sweden; VTI, Sweden.
    Aderum, Tobias
    Autoliv Research, Sweden.
    Ågren, S. Magnus
    Chalmers University of Technology, Sweden; University of Gothenburg, Sweden.
    Jonsson, Göran
    Volvo Cars, Sweden.
    Heldal, Rogardt
    Chalmers University of Technology, Sweden; University of Gothenburg, Sweden.
    Bergenhem, Carl
    Qamcom Research and Technology AB, Sweden.
    Thorsen, Anders
    RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik.
    Architecting cars as constituents of a system of systems2016Ingår i: Proceedings of the International Colloquium on Software-intensive Systems-of-Systems at 10th European Conference on Software Architecture, ACM , 2016, artikel-id 5Konferensbidrag (Refereegranskat)
    Abstract [en]

    Future transportation systems will be a heterogeneous mix of items with varying connectivity and interoperability. A mix of new technologies and legacy systems will co-exist to realize a variety of scenarios involving not only connected cars but also road infrastructures, pedestrians, cyclists, etc. Future transportation systems can be seen as a System of Systems (SoS), where each constituent system - one of the units that compose an SoS - can act as a standalone system, but the cooperation among the constituent systems enables new emerging and promising scenarios. In this paper we investigate how to architect cars so that they can be constituents of future transportation systems. This work is realized in the context of two Swedish projects coordinated by Volvo Cars and involving some universities and research centers in Sweden and many suppliers of the OEM, including Autoliv, Arccore, Combitech, Cybercom, Knowit, Prevas, ÅF-Technology, Semcom, and Qamcom.

  • 21.
    Petersen, Kai
    et al.
    Blekinge Institute of Technology, Sweden.
    Badampudi, Deepika
    Blekinge Institute of Technology, Sweden.
    Shah, Syed
    RISE - Research Institutes of Sweden, ICT, SICS.
    Wnuk, Krzysztof
    Blekinge Institute of Technology, Sweden.
    Gorschek, Tony
    Blekinge Institute of Technology, Sweden.
    Papatheocharous, Efi
    RISE - Research Institutes of Sweden, ICT, SICS.
    Axelsson, Jakob
    RISE - Research Institutes of Sweden, ICT, SICS.
    Sentilles, Séverine
    Mälardalen University, Sweden.
    Crnkovic, Ivica
    Chalmers University of Technology, Sweden.
    Choosing Component Origins for Software Intensive Systems: In-house, COTS, OSS or Outsourcing? – A Case Survey2018Ingår i: IEEE Transactions on Software Engineering, ISSN 0098-5589, E-ISSN 1939-3520, Vol. 44, nr 3, s. 237-261Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The choice of which software component to use influences the success of a software system. Only a few empirical studies investigate how the choice of components is conducted in industrial practice. This is important to understand to tailor research solutions to the needs of the industry. Existing studies focus on the choice for off-the-shelf (OTS) components. It is, however, also important to understand the implications of the choice of alternative component sourcing options (CSOs), such as outsourcing versus the use of OTS. Previous research has shown that the choice has major implications on the development process as well as on the ability to evolve the system. The objective of this study is to explore how decision making took place in industry to choose among CSOs. Overall, 22 industrial cases have been studied through a case survey. The results show that the solutions specifically for CSO decisions are deterministic and based on optimization approaches. The non-deterministic solutions proposed for architectural group decision making appear to suit the CSO decision making in industry better. Interestingly, the final decision was perceived negatively in nine cases and positively in seven cases, while in the remaining cases it was perceived as neither positive nor negative.

  • 22.
    Raaholt, Birgitta
    et al.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Isaksson, Sven
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Hamberg, Lars
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Fhager, Andreas
    Chalmers University of Technology, Sweden.
    Hamnerius, Yngve
    Chalmers University of Technology, Sweden.
    Continuous tubular microwave heating of homogeneous foods: evaluation of heating uniformity2016Ingår i: The Journal of microwave power and electromagnetic energy, ISSN 0832-7823, Vol. 50, nr 1, s. 43-65Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A pilot-scale process for continuous in-flow microwave processing of foods, designed and implemented at SP Food and Bioscience, was evaluated for heat treatment of a homogeneous model food for high-temperature short-time (HTST) conditions, at constant total input microwave power, at 2450 MHz. The microwave system has three consecutive cavities, one excited by the TM020 microwave mode that heats primarily in the tube centre, and two TM120 mode cavities that heat primarily in the tube periphery. The temperature uniformity of the homogeneous model food after microwave heating is here evaluated in terms of spatial distribution, for different set-ups of input microwave power in each cavity and for different order of the placement of the cavities, while maintaining the total input microwave power. The microwave heating uniformity is evaluated, based on measured and calculated radial temperature profiles. Combined TM020 and TM120 heating was found to result in more uniform heating by means of spatial temperature uniformity over the tube cross section. Furthermore, appropriately selected microwave power distribution between the centre and periphery heating cavities results in a stable heating profile in the studied food, that differs only about 10 °C or less between highest and lowest average values directly after microwave heating.

  • 23.
    Tas, E.
    et al.
    METAS Federal Institute of Metrology, Switzerland.
    Cakir, S.
    TÜBİTAK UME National Metrology Institute, Turkey.
    Cetintas, M.
    TÜBİTAK UME National Metrology Institute, Turkey.
    Hamouz, P.
    CMI Czech Metrology Institute, Czech Republic.
    Isbring, T.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, EMC.
    Kokalj, M.
    SIQ Slovenian Institute of Quality and Metrology, Slovenia.
    Lopez, D.
    INTA National Institute of Aerospace Technology, Spain.
    Lundgren, U.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, EMC.
    Mandaris, D.
    University of Twente, Netherlands; LIPI Indonesian Institute of Sciences, Indonesia.
    Pinter, B.
    SIQ Slovenian Institute of Quality and Metrology, Slovenia.
    Poriz, M.
    CMI Czech Metrology Institute, Czech Republic.
    Pous, M.
    Polytechnic University of Catalonia, Spain.
    Pythoud, F.
    METAS Federal Institute of Metrology, Switzerland.
    Sen, O.
    TÜBİTAK UME National Metrology Institute, Turkey.
    Silva, F.
    Polytechnic University of Catalonia, Spain.
    Svoboda, M.
    CMI Czech Metrology Institute, Czech Republic.
    Trincaz, B.
    LNE Laboratoire national de métrologie et d'essais, France.
    Zhao, D.
    VSL Dutch Metrology Institute, Netherlands.
    Proficiency testing for conducted immunity with a new round robin test device2016Ingår i: 2016 International Symposium on Electromagnetic Compatibility - EMC EUROPE, 2016, s. 274-279, artikel-id 7739174Konferensbidrag (Refereegranskat)
    Abstract [en]

    Last year, a new round robin test device was proposed for inter-laboratory comparisons in conducted immunity testing according to IEC 61000-4-6[1]. The device has recently been successfully evaluated among all EMRP Project partners. The device is able to confirm or to deny the testing capability of a laboratory by recording a full set of parameters. The device is now ready for deployment as the first commercial proficiency testing device for conducted immunity.

  • 24.
    Tiloca, Marco
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Dini, Gianluca
    University of Pisa, Italy.
    Racciatti, Francesco
    University of Pisa, Italy.
    Stagkopoulou, Alexandra
    RISE - Research Institutes of Sweden, ICT, SICS.
    SEA++: A Framework for Evaluating the Impact of Security Attacks in OMNeT++/INET2019Ingår i: Recent Advances in Network Simulation: The OMNeT++ Environment and its Ecosystem / [ed] A. Virdis and M. Kirsche, Springer International Publishing , 2019, s. 253-278Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    This chapter presents SEA++, a simulation framework that extends OMNeT++ and the INET Framework for evaluating the impact of security attacks on networks and applications in a flexible and user-friendly way. To this end, SEA++ relies on two fundamental building blocks. First, the user describes the attacks to be evaluated by using a high-level Attack Specification Language (ASL). In particular, only the final effects of such attacks are described, rather than their actual performance. Second, the Attack Simulation Engine (ASE) takes these high-level descriptions as input and accordingly injects attack events at runtime, by means of additional software modules that seamlessly and transparently operate with the other INET modules. This allows the user to quantitatively assess the impact of cyber/physical attacks in simulated network scenarios, and hence rank them according to their severity as a support to risk assessment and selection of countermeasures. As a further advantage, the user is not required to alter any software module or application, or to implement any adversary model for the actual execution of security attacks. Finally, this chapter also includes a step-by-step explicative example showing how to set up and use SEA++ for describing attacks and assessing their impact.

  • 25.
    Tiloca, Marco
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Höglund, Rikard
    RISE - Research Institutes of Sweden, ICT, SICS.
    Al Atiiq, Syafiq
    KTH Royal Institute of Technology, Sweden.
    SARDOS: Self-Adaptive Reaction against Denial of Service in the Internet of Things2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    Denial of Service (DoS) is a common and severe security issue in computer networks. Typical DoS attacks overload servers with bogus requests, induce them to worthlessly commit resources, and even make them unable to serve legitimate clients. This is especially relevant in Internet of Things scenarios, where servers are particularly exposed and often equipped with limited resources. Although most countermeasures focus on detection and mitigation, they do not react to dynamically adapt victims' behavior, while at the same time preserving service availability. This paper presents SARDOS, a reactive security service that leverages detection mechanisms from different communication layers, and adaptively changes the operative behavior of victim servers while preserving service availability. We experimentally evaluated SARDOS with a prototype implementation running on an underclocked Raspberry Pi server. Our results show that, when running SARDOS, a server under attack displays considerably lower memory and CPU usage, while still ensuring (best-effort) fulfillment of legitimate requests.

  • 26.
    Toss, Henrik
    RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik.
    How to Perform EMC Testing of Autonomous Vehicles2017Ingår i: Electronic Environment, nr 3, s. 32-34Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    EMC TESTING of autonomous vehicles is challenging because the involved systems are designed to identify unrealistic driving conditions, which is exactly what we have in a typical anechoic EMC chamber. When the system detects unrealistic conditions, autonomous driving functions are disabled or set to predefined states, which means that EMC testing of autonomous functions is not possible. To fully test autonomous driving systems, we therefore need to emulate a realistic environment in many aspects, i.e., we need to stimulate involved sensors in a realistic way.

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