Change search
Refine search result
1 - 16 of 16
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 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.

  • 2.
    Fortes Brollo, Maria Eugenia
    et al.
    Instituto de Ciencia de Materiales de Madrid, Spain.
    Domínguez-Bajo, Ana
    Instituto de Ciencia de Materiales de Madrid, Spain.
    Tabero, Andrea
    Universidad Autónoma de Madrid, Spain.
    Domínguez-Arca, Vicente
    Universidad de Santiago de Compostela, Spain.
    Gisbert, Victor
    Instituto de Ciencia de Materiales de Madrid, Spain.
    Prieto, Gerardo
    Universidad de Santiago de Compostela, Spain.
    Johansson, Christer
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Garcia, Ricardo
    Instituto de Ciencia de Materiales de Madrid, Spain.
    Villanueva, Angeles
    Universidad Autónoma de Madrid, Spain.
    Serrano, María Concepción
    Instituto de Ciencia de Materiales de Madrid, Spain.
    Morales, María Del Puerto
    Instituto de Ciencia de Materiales de Madrid, Spain; IMDEA-Nanociencia, Spain.
    Combined Magnetoliposome Formation and Drug Loading in One Step for Efficient Alternating Current-Magnetic Field Remote-Controlled Drug Release.2020In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 12, no 4, p. 4295-4307Article in journal (Refereed)
    Abstract [en]

    We have developed a reproducible and facile one step strategy for the synthesis of doxorubicin loaded magnetoliposomes by using a thin-layer evaporation method. Liposomes of around 200 nm were made of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and iron oxide nanoparticles (NPs) with negative, positive, and hydrophobic surfaces that were incorporated outside, inside, or between the lipid bilayers, respectively. To characterize how NPs are incorporated in liposomes, advanced cryoTEM and atomic force microscope (AFM) techniques have been used. It was observed that only when the NPs are attached outside the liposomes, the membrane integrity is preserved (lipid melt transition shifts to 38.7 °C with high enthalpy 34.8 J/g) avoiding the leakage of the encapsulated drug while having good colloidal properties and the best heating efficiency under an alternating magnetic field (AMF). These magnetoliposomes were tested with two cancer cell lines, MDA-MB-231 and HeLa cells. First, 100% of cellular uptake was achieved with a high cell survival (above 80%), which is preserved (83%) for doxorubicin-loaded magnetoliposomes. Then, we demonstrate that doxorubicin release can be triggered by remote control, using a noninvasive external AMF for 1 h, leading to a cell survival reduction of 20%. Magnetic field conditions of 202 kHz and 30 mT seem to be enough to produce an effective heating to avoid drug degradation. In conclusion, these drug-loaded magnetoliposomes prepared in one step could be used for drug release on demand at a specific time and place, efficiently using an external AMF to reduce or even eliminate side effects.

  • 3.
    García Lozano, Marianela
    et al.
    FOI Swedish Defence Research Agency, Sweden; KTH Royal Institute of Technology, Sweden.
    Brynielsson, Joel
    FOI Swedish Defence Research Agency, Sweden; KTH Royal Institute of Technology, Sweden.
    Franke, Ulrik
    RISE Research Institutes of Sweden, Digital Systems, Mobility and Systems.
    Rosell, Magnus
    FOI Swedish Defence Research Agency, Sweden.
    Tjörnhammar, Edward
    KTH Royal Institute of Technology, Sweden; FOI Swedish Defence Research Agency, Sweden.
    Varga, Stefan
    KTH Royal Institute of Technology, Sweden; Swedish Armed Forces Headquarters, Sweden.
    Vlassov, Vladimir
    KTH Royal Institute of Technology, Sweden.
    Veracity assessment of online data2020In: Decision Support Systems, ISSN 0167-9236, E-ISSN 1873-5797, Vol. 129, article id 113132Article in journal (Refereed)
    Abstract [en]

    Fake news, malicious rumors, fabricated reviews, generated images and videos, are today spread at an unprecedented rate, making the task of manually assessing data veracity for decision-making purposes a daunting task. Hence, it is urgent to explore possibilities to perform automatic veracity assessment. In this work we review the literature in search for methods and techniques representing state of the art with regard to computerized veracity assessment. We study what others have done within the area of veracity assessment, especially targeted towards social media and open source data, to understand research trends and determine needs for future research. The most common veracity assessment method among the studied set of papers is to perform text analysis using supervised learning. Regarding methods for machine learning much has happened in the last couple of years related to the advancements made in deep learning. However, very few papers make use of these advancements. Also, the papers in general tend to have a narrow scope, as they focus on solving a small task with only one type of data from one main source. The overall veracity assessment problem is complex, requiring a combination of data sources, data types, indicators, and methods. Only a few papers take on such a broad scope, thus, demonstrating the relative immaturity of the veracity assessment domain. © 2019 The Authors

  • 4.
    Gehrmann, C.
    et al.
    Lund University, Sweden.
    Gunnarsson, Martin
    RISE Research Institutes of Sweden, Digital Systems, Data Science. Lund University, Sweden.
    A digital twin based industrial automation and control system security architecture2020In: IEEE Transactions on Industrial Informatics, ISSN 1551-3203, E-ISSN 1941-0050, Vol. 16, no 1, p. 669-680, article id 8822494Article in journal (Refereed)
    Abstract [en]

    The digital twin is a rather new industrial control and automation systems concept. While the approach so far has gained interest mainly due to capabilities to make advanced simulations and optimizations, recently the possibilities for enhanced security have got attention within the research community. In this article, we discuss how a digital twin replication model and corresponding security architecture can be used to allow data sharing and control of security-critical processes. We identify design-driving security requirements for digital twin based data sharing and control. We show that the proposed state synchronization design meets the expected digital twin synchronization requirements and give a high-level design and evaluation of other security components of the architecture. We also make performance evaluations of a proof of concept for protected software upgrade using the proposed digital twin design. Our new security framework provides a foundation for future research work in this promising new area.

  • 5.
    Höglund, Joel
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    Lindemer, Samuel
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    Furuhed, Martin
    Technology Nexus Secured Business Solutions, Sweden.
    Raza, Shahid
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    PKI4IoT: Towards public key infrastructure for the Internet of Things2020In: Computers & security (Print), ISSN 0167-4048, E-ISSN 1872-6208, Vol. 89, article id 101658Article in journal (Refereed)
    Abstract [en]

    Public Key Infrastructure is the state-of-the-art credential management solution on the Internet. However, the millions of constrained devices that make of the Internet of Things currently lack a centralized, scalable system for managing keys and identities. Modern PKI is built on a set of protocols which were not designed for constrained environments, and as a result many small, battery-powered IoT devices lack the required computing resources. In this paper, we develop an automated certificate enrollment protocol light enough for highly constrained devices, which provides end-to-end security between certificate authorities (CA) and the recipient IoT devices. We also design a lightweight profile for X.509 digital certificates with CBOR encoding, called XIOT. Existing CAs can now issue traditional X.509 to IoT devices. These are converted to and from the XIOT format by edge devices on constrained networks. This procedure preserves the integrity of the original CA signature, so the edge device performing certificate conversion need not be trusted. We implement these protocols within the Contiki embedded operating system and evaluate their performance on an ARM Cortex-M3 platform. Our evaluation demonstrates reductions in energy expenditure and communication latency. The RAM and ROM required to implement these protocols are on par with the other lightweight protocols in Contiki’s network stack.

  • 6.
    Jafari Jam, Reza
    et al.
    Lund University, Sweden.
    Persson, Axel
    Lund University, Sweden.
    Barrigón, Enrique
    Lund University, Sweden.
    Heurlin, Magnus
    Lund University, Sweden.
    Geijselaers, Irene
    Lund University, Sweden.
    Gómez, Victor
    Lund University, Sweden.
    Hultin, Olof
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Samuelson, Lars
    Lund University, Sweden.
    Borgström, Magnus
    Lund University, Sweden.
    Pettersson, Håkan
    Lund University, Sweden; Halmstad University, Sweden.
    Template-assisted vapour-liquid-solid growth of InP nanowires on (001) InP and Si substrates2020In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 12, no 2, p. 888-894Article in journal (Refereed)
    Abstract [en]

    We report on the synthesis of vertical InP nanowire arrays on (001) InP and Si substrates using template-assisted vapour-liquid-solid growth. A thick silicon oxide layer was first deposited on the substrates. The samples were then patterned by electron beam lithography and deep dry etching through the oxide layer down to the substrate surface. Gold seed particles were subsequently deposited in the holes of the pattern by the use of pulse electrodeposition. The subsequent growth of nanowires by the vapour-liquid-solid method was guided towards the [001] direction by the patterned oxide template, and displayed a high growth yield with respect to the array of holes in the template. In order to confirm the versatility and robustness of the process, we have also demonstrated guided growth of InP nanowire p-n junctions and InP/InAs/InP nanowire heterostructures on (001) InP substrates. Our results show a promising route to monolithically integrate III-V nanowire heterostructure devices with commercially viable (001) silicon platforms.

  • 7.
    Köckemann, Uwe
    et al.
    Örebro University, Sweden.
    Alirezaie, Marjan
    Örebro University, Sweden.
    Renoux, Jennifer
    Örebro University, Sweden.
    Tsiftes, Nicolas
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    Uddin Ahmed, Mobyen
    Mälardalen University, Sweden.
    Morberg, Daniel
    Mälardalen University, Sweden.
    Lindén, Maria
    Mälardalen University, Sweden.
    Loutfi, Amy
    Örebro University, Sweden.
    Open-Source Data Collection and Data Sets for Activity Recognition in Smart Homes2020In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 20, no 3, article id 879Article in journal (Refereed)
    Abstract [en]

    As research in smart homes and activity recognition is increasing, it is of ever increasing importance to have benchmarks systems and data upon which researchers can compare methods.While synthetic data can be useful for certain method developments, real data sets that are open and shared are equally as important. This paper presents the E-care@home system, its installation in a real home setting, and a series of data sets that were collected using the E-care@home system. Our first contribution, the E-care@home system, is a collection of software modules for data collection, labeling, and various reasoning tasks such as activity recognition, person counting, and configuration planning.It supports a heterogeneous set of sensors that can be extended easily and connects collected sensor data to higher-level Artificial Intelligence (AI) reasoning modules. Our second contribution is a series of open data sets which can be used to recognize activities of daily living. In addition to these data sets, we describe the technical infrastructure that we have developed to collect the data and the physical environment. Each data set is annotated with ground-truth information, making it relevant for researchers interested in benchmarking different algorithms for activity recognition.

  • 8.
    Morales-Simfors, Nury
    et al.
    RISE Research Institutes of Sweden, Digital Systems. University of Southern Queensland, Australia.
    Bundschuh, Jochen
    University of Southern Queensland, Australia.
    Herath, Indika
    University of Southern Queensland, Australia.
    Inguaggiato, Claudio
    Centro de Investigación Científica y de Educación Superior de Ensenada, Mexico.
    Caselli, Alberto
    Universidad Nacional de Rio Negro, Argentina.
    Tapia, Joseline
    Universidad de Santo Tomás, Chile.
    Choquehuayta, Fredy
    INGEMMET, Chile.
    Armienta, Maria
    Universidad Nacional Autónoma de México, Mexico.
    Ormachea, Mauricio
    Universidad Mayor de San Andrés, Bolivia.
    Joseph, Erouscilla
    University of West Indies, Trinidad and Tobago.
    López, Dina
    Ohio University, USA.
    Arsenic in Latin America: A critical overview on the geochemistry of arsenic originating from geothermal features and volcanic emissions for solving its environmental consequences2020In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, article id 135564Article in journal (Refereed)
    Abstract [en]

    Geothermal fluids and volcanic emissions are important sources of arsenic (As), resulting in elevated concentrations of As in ground-, surface-water and soil, which may adversely affect the environment. Arsenic originating from geothermal features and volcanic activities is common in Latin America forming a serious threat to the livelihoods of millions of people. This review attempts to provide a critical overview of the geochemistry of As originating from these sources in Latin America to understand what information exists about and what future research needs to be undertaken. This study evaluated 15 countries in Latin America. In total, 423 sites were characterized with As originating from geothermal sources, mostly related to present volcanic activity (0.001 < As<73 mg/L, mean: 36.5 mg/L) and the transboundary Guarani Aquifer System (0.001 < As<0.114 mg/L, mean: 0.06 mg/L). Many of the geothermal systems and volcanoes discussed in this study are close to densely populated cities, including Bogota, Managua, San José, Guatemala City and Mexico City, where total As concentrations in natural ground- and surface- water exceed the safe drinking water guideline of 0.01 mg/L, recommended by the World Health Organization (WHO). However, the wide geographical occurrence of As in geothermal fluids and volcanic emissions of this region is by far not fully understood, so that development of geographical maps based on geographic information system (GIS) is an urgent necessity to understand the real nature of the problem. The assessment of environmental risks and the potential impacts on human health both inadequate and scarce and hence, these gaps need to be addressed by future research. The present holistic assessment of As originating from geothermal features and volcanic emissions would be a driving force to formulate a plan for establishing a sustainable As mitigation in vulnerable areas of Latin America in the near future. An assessment of the geochemistry, mobility and distribution of As would augment the effectiveness of the plan.

  • 9.
    Méhes, Gabor
    et al.
    Linköping University, Sweden.
    Vagin, Mikhail
    Linköping University, Sweden.
    Mulla, Mohammad
    Linköping University, Sweden.
    Granberg, Hjalmar
    RISE Research Institutes of Sweden, Bioeconomy and Health, Pulp, Paper and Packaging.
    Che, Canyan
    Linköping University, Sweden.
    Beni, Valerio
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Crispin, Xavier
    Linköping University, Sweden.
    Berggren, Magnus
    Linköping University, Sweden.
    Stavrinidou, Eleni
    Linköping University, Sweden.
    Simon, Daniel
    Linköping University, Sweden.
    Solar Heat-Enhanced Energy Conversion in Devices Based on Photosynthetic Membranes and PEDOT:PSS-Nanocellulose Electrodes2020In: Advanced Sustainable Systems, ISSN 2366-7486, Vol. 4, no 1, article id 1900100Article in journal (Refereed)
    Abstract [en]

    Energy harvesting from photosynthetic membranes, proteins, or bacteria through bio-photovoltaic or bio-electrochemical approaches has been proposed as a new route to clean energy. A major shortcoming of these and solar cell technologies is the underutilization of solar irradiation wavelengths in the IR region, especially those in the far IR region. Here, a biohybrid energy-harvesting device is demonstrated that exploits IR radiation, via convection and thermoelectric effects, to improve the resulting energy conversion performance. A composite of nanocellulose and the conducting polymer system poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is used as the anode in biohybrid cells that includes thylakoid membranes (TMs) and redox mediators (RMs) in solution. By irradiating the conducting polymer electrode by an IR light-emitting diode, a sixfold enhancement in the harvested bio-photovoltaic power is achieved, without compromising stability of operation. Investigation of the output currents reveals that IR irradiation generates convective heat transfer in the electrolyte bulk, which enhances the redox reactions of RMs at the anode by suppressing diffusion limitations. In addition, a fast-transient thermoelectric component, originating from the PEDOT:PSS-nanocellulose-electrolyte interphase, further increases the bio-photocurrent. These results pave the way for the development of energy-harvesting biohybrids that make use of heat, via IR absorption, to enhance energy conversion efficiency. 

  • 10.
    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.

  • 11.
    Pohl, Hans
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Mobility and Systems.
    Karlström, Magnus
    Lindholmen Science Park, Sweden.
    Elektrifierade vägtransporter: publikationsstudie2020Report (Other academic)
    Abstract [en]

    Road transport electrification – publication analysis

    This report summarizes the results of a study of scientific publications within vehicle electrification, i.e. battery, hybrid and/or fuel cell electric vehicles including the recharg-ing or refuelling infrastructure. A new method was developed for the study, which extracts Scopus publications relating to vehicle electrification. Three enabling technolo-gies; batteries, fuel cells, and electric machines including power electronics, were studied separately, as such publications only to a small extent are captured when searching for publications mentioning automotive applications.

    Results are given for the top 16 countries in terms of volume within vehicle electrification with special attention given to publications including Swedish (co-)authors. China is the dominating country and is still increasing its share. Sweden has a percentage of the world production between 0.8 – 1.4% and relatively low growth rate. On the other hand, the citation impact is high.

    Among the enabling technologies, batteries show the highest growth rate, in Sweden as well as in the world. China is approaching a 50% share of all battery publications.

    Other entities studied and discussed are institutions and authors and different dimen-sions including how international the research is and the share of academic-corporate co-publications.

  • 12.
    Rudmark, Daniel
    RISE Research Institutes of Sweden, Digital Systems, Mobility and Systems.
    Open Data Standards: Vertical Industry Standards to Unlock Digital Ecosystems2020In: Proceedings of the 53rd Hawaii International Conference on System Sciences, 2020Conference paper (Refereed)
    Abstract [en]

    Standards are considered an essential means to facilitate value creation from open data. Despite this importance, we find that empirical studies of open data standards have not been conducted in proportion to its importance. In particular, the literature has insofar been silent about why specific standards are chosen and how these standards are implemented. To this end, we report from an action research project with the Swedish public transport industry, where open data standards were both chosen and implemented. Consistent with the literature, we find standards were selected based on expected increased attractivity for re-users. Also, and more surprisingly, we found that open data standards were chosen as a means to harness resources in adjacent digital ecosystems. Finally, our findings convey that implementing open data standards may hamper the possibility to publish datasets, with its original qualities.

  • 13.
    Schier, P.
    et al.
    UMIT Private University for Health Sciences, Austria.
    Barton, C.
    National Physics Laboratory, UK.
    Spassov, S.
    Institut Royal Meteorologique De Belgique, Belgium.
    Johansson, Christer
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Baumgarten, D.
    UMIT Private University for Health Sciences, Austria.
    Kazakova, O.
    National Physics Laboratory, UK.
    Southern, P.
    University College London, UK.
    Pankhurst, Q.
    University College London, UK.
    Coisson, M.
    Istituto Nazionale di Ricerca Metrologica, Italy.
    Grüttner, C.
    micromod Partikeltechnologie GmbH, Germany.
    Price, A.
    BSI Standards Limited, UK.
    Rüttinger, R.
    DIN Deutsches Institut für Normung e. V., Germany.
    Wiekhorst, F.
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Wells, J.
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Steinhoff, U.
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    European Research on Magnetic Nanoparticles for Biomedical Applications: Standardisation Aspects2020In: 21st Polish Conference on Biocybernetics and Biomedical Engineering, PCBBE 2019, Springer Verlag , 2020, p. 316-326Conference paper (Refereed)
    Abstract [en]

    Magnetic nanoparticles have many applications in biomedicine and other technical areas. Despite their huge economic impact, there are no standardised procedures available to measure their basic magnetic properties. The International Organization for Standardization is working on a series of documents on the definition of characteristics of magnetic nanomaterials. We review previous and ongoing European research projects on characteristics of magnetic nanoparticles and present results of an online survey among European researchers.

  • 14.
    Tagle, Matias
    et al.
    Centro Mario Molina Chile, Chile.
    Rojas, Francisca
    Centro Mario Molina Chile, Chile.
    Reyes, Filipe
    Centro Mario Molina Chile, Chile.
    Vásquez, Yeanice
    Centro Mario Molina Chile, Chile.
    Hallgren, Fredrik
    IVL Swedish Environmental Research Institute, Sweden.
    Lindén, Jenny
    IVL Swedish Environmental Research Institute, Sweden.
    Kolev, Dimitar
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Watne, Ågot
    City of Gothenburg, Sweden.
    Oyola, Pedro
    Centro Mario Molina Chile, Chile.
    Field performance of a low-cost sensor in the monitoring of particulate matter in Santiago, Chile2020In: Environmental Monitoring & Assessment, ISSN 0167-6369, E-ISSN 1573-2959, Vol. 192, no 3, article id 171Article in journal (Refereed)
    Abstract [en]

    Integration of low-cost air quality sensors with the internet of things (IoT) has become a feasible approach towards the development of smart cities. Several studies have assessed the performance of low-cost air quality sensors by comparing their measurements with reference instruments. We examined the performance of a low-cost IoT particulate matter (PM10 and PM2.5) sensor in the urban environment of Santiago, Chile. The prototype was assembled from a PM10–PM2.5 sensor (SDS011), a temperature and relative humidity sensor (BME280) and an IoT board (ESP8266/Node MCU). Field tests were conducted at three regulatory monitoring stations during the 2018 austral winter and spring seasons. The sensors at each site were operated in parallel with continuous reference air quality monitors (BAM 1020 and TEOM 1400) and a filter-based sampler (Partisol 2000i). Variability between sensor units (n = 7) and the correlation between the sensor and reference instruments were examined. Moderate inter-unit variability was observed between sensors for PM2.5 (normalized root-mean-square error 9–24%) and PM10 (10–37%). The correlations between the 1-h average concentrations reported by the sensors and continuous monitors were higher for PM2.5 (R2 0.47–0.86) than PM10 (0.24–0.56). The correlations (R2) between the 24-h PM2.5 averages from the sensors and reference instruments were 0.63–0.87 for continuous monitoring and 0.69–0.93 for filter-based samplers. Correlation analysis revealed that sensors tended to overestimate PM concentrations in high relative humidity (RH &gt; 75%) and underestimate when RH was below 50%. Overall, the prototype evaluated exhibited adequate performance and may be potentially suitable for monitoring daily PM2.5 averages after correcting for RH. 

  • 15.
    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.

  • 16.
    Wang, Shaun S.
    et al.
    Southern University of Science and Technology, China; Nanyang Technological University, Singapore.
    Franke, Ulrik
    RISE Research Institutes of Sweden, Digital Systems, Mobility and Systems.
    Enterprise IT service downtime cost and risk transfer in a supply chain2020In: Operations Management Research, ISSN 1936-9735, E-ISSN 1936-9743Article in journal (Refereed)
    Abstract [en]

    In this paper we present an economic model for analyzing enterprise IT service downtime cost, first on a standalone basis and then in a supply chain setting. With a baseline probability model of Poisson arrival frequency with random downtime duration, we analyze optimal production of a firm’s investments in reducing frequency and duration of downtime, and corresponding premiums for insuring against downtime cost. We also present a model for the spillover effect of downtime for interconnected firms in a supply chain, and discuss how third-party insurance coverage can help enterprises to internalize the externalities of spillover effects on the supply chain.

1 - 16 of 16
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.9