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  • 101.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Bra arbetsmiljö lönar sig!: tips för arbetsgivare inom jordbruket, SLA2005Report (Refereed)
  • 102.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Enkla åtgärder för att minska vibrationsnivåer i jordbrukstraktorer, SLO 9272009Report (Refereed)
  • 103.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Förbättrad arbetsmiljö i silo, SLO2012Report (Refereed)
  • 104.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Gödsla med toalettavfall: men certifiera först!2012Report (Refereed)
  • 105.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Helkroppsvibrationer: Behöver lantbrukaren bry sig? SLO-8972006Report (Refereed)
  • 106.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Kraftöverföringsaxeln: traktorredskapets farligaste del, SLO2013Report (Refereed)
  • 107.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Lägre helkroppsvibrationer med en vibrationsindikator i traktorn, SLO2011Report (Refereed)
  • 108.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Rätt arbetsmiljö i mjölkgropen - SLO 9072008Report (Refereed)
  • 109.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Säkra hjulbyten på jordbrukstraktorer: i fält och i verkstad, SLO2014Report (Refereed)
  • 110.
    Adolfsson, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Säkrare jordbruk med kamerasystem som visuellt hjälpmedel i traktorer: SLO 9462010Report (Refereed)
  • 111.
    Adolfsson, Niklas
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Geng, Qiuqing
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Exponering för olycksfallsrisk och fysisk belastning vid rid- och travskolor2008Report (Refereed)
  • 112.
    Adolfsson, Niklas
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Torén, Anna
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    JTI ger tekniktips till traktorförare2004Report (Refereed)
  • 113.
    Adolfsson, Niklas
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Torén, Anna
    Öberg, Kurt
    Biomekanisk analys av belastning i höft och skuldra vid varierande sittställning i hjullastare2002Report (Refereed)
  • 114.
    Adolfsson, Niklas
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Torén, Anna
    Öberg, Kurt
    Hälsoeffekter vid automatisk nivellering av stol vid traktorkörning2004Report (Refereed)
  • 115.
    Adolfsson, Niklas
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Öberg, Kurt
    Torén, Anna
    Förebyggande av belastningsskador vid arbete med armstödsburna reglage i mobila arbetsmaskiner2004Report (Refereed)
  • 116.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    300/30 - a class that does not exist, but which is nevertheless used2002In: BrandPosten, no 27, p. 25-Article in journal (Other (popular science, discussion, etc.))
  • 117.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    300/30 - en klass som inte finns men som används ändå2002In: BrandPosten, no 27, p. 24-Article in journal (Other (popular science, discussion, etc.))
  • 118.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Assa brandprovar för CE-märkning2003In: BrandPosten, no 29, p. 11-Article in journal (Other (popular science, discussion, etc.))
  • 119.
    Adolfsson, Per
    Sitac (CEc).
    Boverkets nya byggregler BBR 19 träder i kraft från den 1 januari 20122011In: Brandposten, no 45, p. 16-Article in journal (Other (popular science, discussion, etc.))
  • 120.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Brandavskiljande byggnadsdelar är inte alltid röktäta2002In: BrandPosten, no 27, p. 23-Article in journal (Other (popular science, discussion, etc.))
  • 121.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Branddörrar kan provas för kommande CE-märkning2002In: BrandPosten, no 27, p. 24-Article in journal (Other (popular science, discussion, etc.))
  • 122.
    Adolfsson, Per
    Sitac (CEc).
    CE-märkta brandavskiljande innerväggar2003In: BrandPosten, no 28, p. 44-Article in journal (Other (popular science, discussion, etc.))
  • 123.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    CEN ser över standarden för brandprovning av förvaringsskåp2003In: BrandPosten, no 28, p. 24-Article in journal (Other (popular science, discussion, etc.))
  • 124.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Fire doors can be tested for future CE-marketing2002In: BrandPosten, no 27, p. 24-25Article in journal (Other (popular science, discussion, etc.))
  • 125.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Fire-separating parts of buildings are not always smoke-tight2002In: BrandPosten, no 27, p. 23-Article in journal (Other (popular science, discussion, etc.))
  • 126.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Sapa först med klassifikationsrapport enligt ny standard2003In: BrandPosten, no 29, p. 44-Article in journal (Other (popular science, discussion, etc.))
  • 127.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    SP erbjuder certifiering av marin utrustning2000In: BrandPosten, no 22, p. 7-Article in journal (Other (popular science, discussion, etc.))
  • 128.
    Adolfsson, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    SP är anmält organ för EU-direktivet om marin utrustning2001In: BrandPosten, no 24, p. 4-Article in journal (Other (popular science, discussion, etc.))
  • 129.
    Adolfsson, Per
    et al.
    Sitac (CEc).
    Gustavsson, Börje
    Byggnadsfysik och innemiljö (ETi ).
    Häggström, Urban
    SP- Sveriges Tekniska Forskningsinstitut, Trätek.
    CE-märkning av fönster2008Report (Refereed)
  • 130.
    Adolfsson, Per
    et al.
    Sitac (CEc).
    Gustavsson, Börje
    Byggnadsfysik och innemiljö (ETi ).
    Häggström, Urban
    SP- Sveriges Tekniska Forskningsinstitut, Trätek.
    CE-märkning av ytterdörrar2008Report (Refereed)
  • 131.
    Adomat, M
    et al.
    RISE, Swedish ICT, Acreo.
    Fonjallaz, P-Y
    Olofsson, F
    Step-wise tunability of a DBR laser with a superimposed fiber grating external cavity2000In: Proceedings of OFC 2000 - Optical Fiber Communication Conference, 196, (2000)., 2000, Vol. 1, p. 196-198Conference paper (Refereed)
    Abstract [en]

    A DBR laser is step-wise tunable thanks to a superimposed fiber grating external cavity. The stability against tuning current variations in the DBR is excellent. Single-mode operation is achieved with SMSR better than 30 dB.

  • 132.
    Afanasov, Mikhail
    et al.
    Politecnico di Milano, Italy.
    Iavorskii, Aleksandr
    John Wiley & Sons Inc, Russia.
    Mottola, Luca
    RISE - Research Institutes of Sweden, ICT, SICS. Politecnico di Milano, Italy.
    Programming Support for Time-sensitive Adaptation in Cyberphysical Systems2018In: ACM SIGBED Review, Vol. 14, no 4, p. 27-32Article in journal (Refereed)
    Abstract [en]

    Cyberphysical systems (CPS) integrate embedded sensors,actuators, and computing elements for controlling physicalprocesses. Due to the intimate interactions with thesurrounding environment, CPS software must continuouslyadapt to changing conditions. Enacting adaptation decisionsis often subject to strict time requirements to ensure controlstability, while CPS software must operate within the tightresource constraints that characterize CPS platforms. Developersare typically left without dedicated programmingsupport to cope with these aspects. This results in either toneglect functional or timing issues that may potentially ariseor to invest significant efforts to implement hand-crafted solutions.We provide programming constructs that allow developersto simplify the specification of adaptive processingand to rely on well-defined time semantics. Our evaluationshows that using these constructs simplifies implementationswhile reducing developers’ effort, at the price of a modestmemory and processing overhead.

  • 133.
    Afanasov, Mikhail
    et al.
    Politecnico di Milano, Italy.
    Mottola, Luca
    RISE - Research Institutes of Sweden, ICT, SICS. Politecnico di Milano, Italy.
    Ghezzi, Carlo
    Politecnico di Milano, Italy.
    Software Adaptation in Wireless Sensor Networks2018In: ACM Transactions on Autonomous and Adaptive Systems, Vol. 12, no 4, p. 1-29Article in journal (Refereed)
    Abstract [en]

    We present design concepts, programming constructs, and automatic verification techniques to support thedevelopment of adaptive Wireless Sensor Network (WSN) software. WSNs operate at the interface betweenthe physical world and the computing machine, and are hence exposed to unpredictable environment dynamics.WSN software must adapt to these dynamics to maintain dependable and efficient operation. Whilesignificant literature exists on the necessary adaptation logic, developers are left without proper support inmaterializing such a logic in a running system. Our work fills this gap with three key contributions: i) designconcepts help developers organize the necessary adaptive functionality and understand their relations,ii) dedicated programming constructs simplify the implementations, iii) custom verification techniques allowdevelopers to check the correctness of their design before deployment. We implement dedicated toolsupport to tie the three contributions, facilitating their practical application. Our evaluation considers representativeWSN applications to analyze code metrics, synthetic simulations, and cycle-accurate emulationof popular WSN platforms. The results indicate that our work is effective in simplifying the developmentof adaptive WSN software; for example, implementations are provably easier to test and to maintain, therun-time overhead of our dedicated programming construct is negligible, and our verification techniquesreturn results in a matter of seconds.

  • 134.
    Afrasiabi, Roodabeh
    et al.
    KTH Royal Institute of Technology, Sweden.
    Soderberg, Lovisa M.
    KTH Royal Institute of Technology, Sweden.
    Joensson, Haakan N.
    KTH Royal Institute of Technology, Sweden.
    Björk, Per
    RISE, Swedish ICT, Acreo.
    Svahn, Helene A.
    KTH Royal Institute of Technology, Sweden.
    Linnros, Jan
    KTH Royal Institute of Technology, Sweden.
    Integration of a droplet-based microfluidic system and silicon nanoribbon FET sensor2016In: Micromachines, ISSN 2072-666X, E-ISSN 2072-666X, Vol. 7, no 8, article id 134Article in journal (Refereed)
    Abstract [en]

    We present a novel microfluidic system that integrates droplet microfluidics with a silicon nanoribbon field-effect transistor (SiNR FET), and utilize this integrated system to sense differences in pH. The device allows for selective droplet transfer to a continuous water phase, actuated by dielectrophoresis, and subsequent detection of the pH level in the retrieved droplets by SiNR FETs on an electrical sensor chip. The integrated microfluidic system demonstrates a label-free detection method for droplet microfluidics, presenting an alternative to optical fluorescence detection. In this work, we were able to differentiate between droplet trains of one pH-unit difference. The pH-based detection method in our integrated system has the potential to be utilized in the detection of biochemical reactions that induce a pH-shift in the droplets.

  • 135. Africano, Diana
    et al.
    Clark, Brendon
    RISE, Swedish ICT, Interactive Institute. Design Research Unit.
    Design för kulturell mångfald2006In: Västerbotten (Umeå. 1920), Västerbotten (Umeå. 1920) , 2006, 10, p. 36-39Chapter in book (Other academic)
  • 136.
    Afshari, Alireza
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor. Chalmers tekniska högskola, Institutionen för installationsteknik.
    Determination of VOC emissions from surface coatings by environmental test chamber measurements1999Doctoral thesis, monograph (Other academic)
  • 137.
    Agerkvist, I
    YKI – Ytkemiska institutet.
    Mechanisms of flocculation with chitosan in Escherichia coli distintegrates: effects of urea and chitosan characteristics1992In: Colloids and Surfaces, ISSN 0166-6622, E-ISSN 1873-4340, Vol. 69, p. 173-187Article in journal (Refereed)
    Abstract [en]

    Four different chitosans with different charge densities and different molecular weights were used for investigation of the mechanisms involved in selective flocculation of cell debris particles in E.coli disintegrates. It was found that the main mechanism for flocculation is a "non-equilibrium" bridging process in which a very efficient removal of cell debris particles can be achieved with highly charged chitosans. The high molecular weight (6.5-6.6x105) chitosans produce very large and shear resistant flocs suitable for filtration as well as settling and centrifugation. The low molecular weight (1x105) product forms smaller and more shear sensitive flocs best suited for centrifugation. There are small differences in flocculation dosages depending on molecular weight, but large differences are found with significant changes in charge densities. A decrease in the deacetylation degree from 93 to 39% increased the flocculation dosages by 100 to 150%. A low molecular weight chitosan gave a much broader flocculation region than that of a high molecular weight. Flocculation by addition of urea revealed a hydrogen bonding capacity of chitosan toward cell debris particles which was not involved in chitosan´s interaction with proteins or nucleic acids. The purification of the enzyme -galactosidase could be increased by a factor of 3.7 when using a two step flocculation procedure. The enzyme yield was 82% and the enzyme solution was essentially free of both nucleic acids and cell debris particles.

  • 138.
    Agerkvist, I
    et al.
    YKI – Ytkemiska institutet.
    Eriksson, LB
    YKI – Ytkemiska institutet.
    Selective flocculation with chitosan in E.Coli disintegrates: effects of ionic strength and multivalent metal ions1993In: Journal of Dispersion Science and Technology, ISSN 0193-2691, E-ISSN 1532-2351, Vol. 14, p. 269-293Article in journal (Refereed)
    Abstract [en]

    The effects of ionic strength and multivalent metal ions on the flocculation performance in Escherichia coli cell disintegrates using the polycationic chitosan as a flocculant were investigated. The study showed that ionic strength could be used to optimize the selectivity in flocculation. The best selectivity was obtained at 0.5 M sodium chloride where 95% of the cell debris and 88% of the nucleic acids could be removed from the disintegrate by sedimentation, leaving 99% of proteins and 86% of -galactosidase enzyme activity in clarified solution. We will also discuss the mechanisms for interaction between chitosan and different groups of components in the disintegrate: cell debris particles, nucleic acid polymers and proteins.

  • 139. Aggoun, Abderrahmane
    et al.
    Beldiceanu, Nicolas
    Carlsson, Mats
    RISE, Swedish ICT, SICS. Computer Systems Laboratory.
    Fages, François
    Integrating rule-based modelling and constraint programming for solving industrial packing problems2010In: ERCIM News, ISSN 0926-4981, E-ISSN 1564-0094, p. 34-35Article in journal (Other (popular science, discussion, etc.))
    Abstract [en]

    Packing items in bins is an old but nevertheless challenging combinatorial problem with numerous applications in industry. We report on an original approach based on constraint programming and rule-based modelling, which has been investigated in the framework of the FP6 ‘specific targeted research project’ Net-WMS (Towards integrating virtual reality and optimization techniques in a new generation of Networked businesses in Warehouse Management Systems under constraints). It has applications in the automotive industry.

  • 140.
    Aghaeinezhadfirouzja, Saeid
    et al.
    Shanghai Jiao Tong University, China.
    Liu, Hui
    Shanghai Jiao Tong University, China.
    Balador, Ali
    RISE - Research Institutes of Sweden, ICT, SICS. Mälardalen University, Sweden.
    Practical 3-D beam pattern based channel modeling for multi-polarized massive MIMO systems2018In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 18, no 4, article id 1186Article in journal (Refereed)
    Abstract [en]

    In this paper, a practical non-stationary three-dimensional (3-D) channel models for massive multiple-input multiple-output (MIMO) systems, considering beam patterns for different antenna elements, is proposed. The beam patterns using dipole antenna elements with different phase excitation toward the different direction of travels (DoTs) contributes various correlation weights for rays related towards/from the cluster, thus providing different elevation angle of arrivals (EAoAs) and elevation angle of departures (EAoDs) for each antenna element. These include the movements of the user that makes our channel to be a non-stationary model of clusters at the receiver (RX) on both the time and array axes. In addition, their impacts on 3-D massive MIMO channels are investigated via statistical properties including received spatial correlation. Additionally, the impact of elevation/azimuth angles of arrival on received spatial correlation is discussed. Furthermore, experimental validation of the proposed 3-D channel models on azimuth and elevation angles of the polarized antenna are specifically evaluated and compared through simulations. The proposed 3-D generic models are verified using relevant measurement data.

  • 141. Agnihotri, S.
    et al.
    Johnsen, I.A.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Moe, S.
    Gregersen, Ø.
    More selective biorefining of softwood by combined hot water and ethanol organosolv pretreatment2011Conference paper (Refereed)
  • 142.
    Agnihotri, Swarnima
    et al.
    NTNU Norwegian University of Science and Technology, Norway.
    Johnsen, Ingvild A.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Böe, Maren S.
    NTNU Norwegian University of Science and Technology, Norway.
    Öyaas, Karin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Moe, Størker
    NTNU Norwegian University of Science and Technology, Norway.
    Ethanol organosolv pretreatment of softwood (Picea abies) and sugarcane bagasse for biofuel and biorefinery applications2015In: Wood Science and Technology, ISSN 0043-7719, E-ISSN 1432-5225, Vol. 49, no 5, p. 881-896Article in journal (Refereed)
    Abstract [en]

    Ethanol derived from biomass has the potential to be a renewable transportation fuel that can replace gasoline. This work was carried out to establish an optimized ethanol organosolv pretreatment of Norway spruce (Picea abies) for bioethanol production (63 wt% EtOH, pH ~3.5 in aqueous phase, 170–240 °C, 90 min) utilizing hydrolytic enzymes in the saccharification step. To test the generality of the method, a series of ethanol organosolv pretreatments were also performed on sugarcane bagasse (50 wt% EtOH, pH ~3.5 in aqueous phase, 155–210 °C, 90–120 min). The degree of delignification increased with increasing temperature during pretreatment, and the fastest increase was observed with sugarcane bagasse. The pretreatments were carried out in a batch mode. The maximum degree of delignification of ~65 % was reached at ~235 °C for Norway spruce, while sugarcane bagasse reached ~80 % at ~210 °C. Cellulose was subjected to degradation (5–10 % points) at these temperatures. Subsequent enzymatic hydrolysis (30 FPU/g cellulose, 32 pNPGU/g cellulose, 50 °C, 48 h) of ethanol organosolv-pretreated biomass achieved complete conversion for both raw materials at the highest degrees of delignification.

  • 143. Ahlberg, C.
    et al.
    Lundell, F.
    Söderberg, L. Daniel
    RISE, Innventia.
    Self-organization of fibers in a suspension between two counter-rotating discs2009In: Proceedings of the ASME Fluids Engineering Division Summer Conference 2009, 2009, Vol. 1, no PART A, p. 585-592Conference paper (Refereed)
    Abstract [en]

    The behavior of fibers suspended in a flow between two flat counter-rotating discs has been studied experimentally. Captured images of the fibers in the flow were analyzed by steerable filters, to extract positions and orientations of the fibers. Experiments were performed for gaps between the discs of less than one fiber length, and for equal absolute values of the angular velocities for the discs. The length-to-diameter ratio of the fibers was approximately 14. During certain conditions, the fibers organized themselves in a distinct manner, which we will denote as fiber trains, in which three or more fibers are aligned next to each other, at the same radial position, with a short fiber-to-fiber distance. The direction of the individual fibers is radial and the direction of the whole train is tangential. Trains containing more than 60 fibers have been observed and are quite impressing.

  • 144.
    Ahlberg-Eliasson, Karin
    et al.
    Swedish Rural Economy and Agricultural Society, Sweden.
    Nadeau, Elisabet
    Swedish Rural Economy and Agricultural Society, Sweden; SLU Swedish University of Agricultural Sciences, Sweden.
    Levén, Lotta
    RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
    Schnürer, Anna
    SLU Swedish University of Agricultural Sciences, Sweden.
    Production efficiency of Swedish farm-scale biogas plants2017In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 97, p. 27-37Article in journal (Refereed)
    Abstract [en]

    Biogas from agricultural waste streams represents an important way to produce fossil-free energy, allow nutrient recycling and reduce greenhouse gas emissions. However, biogas production from agricultural substrates is currently far from reaching its full potential. In Sweden, the number of biogas plants and their output have increased in recent years, but they are still experiencing harsh economic conditions. A recent evaluation (2010–2015) of 31 farm-scale biogas production facilities in Sweden sought to identify parameters of importance for further positive development. In this paper, data on plant operation, gas yield and digestate quality for 27 of these plants are summarised and statistically analysed to investigate factors that could allow an increase in overall biogas production and in nutrient content in the digestate. The analysis showed that addition of co-substrates to manure results in higher gas production, expressed as both specific methane potential and volumetric gas production, than when manure is the sole substrate. Use of co-substrate was also found to be influential for the nutrient content of the digestate. These observed improvements caused by co-digestion should be considered when subsidy systems for manure-based biogas processes are being created, as they could also improve the economics of biogas production. However, to achieve higher efficiency in existing biogas plants and to improve the situation for future investments, a more detailed, long-term evaluation programme should also be considered.

  • 145.
    Ahlers, F.
    et al.
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Kuchera, J.
    Cesky Metrologicky Institut, Czech Republic.
    Poirier, W.
    Laboratoire National de Métrologie et d'Essais, France.
    Jeanneret, B.
    Cesky Metrologicky Institut, Czech Republic.
    Strapinski, A.
    MIKES Mittatekniikan Keskus, Finland.
    Tzalenchuk, A.
    NPL Management, UK.
    Vrabcek, P.
    Slovensky Metrologicky Ustav, Slovakia.
    Bergsten, Tobias
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Hwang, C.
    Korea Research Institute of Standards and Science, South Korea.
    Yakimova, R.
    Linköping University, Sweden.
    Kubatkin, S.
    Chalmers University of Technology, Sweden.
    The EMRP project GraphOhm- Towards quantum resistance metrology based on graphene2014In: CPEM 2014, 2014, , p. 548 - 549p. 548-549Conference paper (Refereed)
    Abstract [en]

    A new joint research project (JRP) integrating metrology institutes and universities from nine countries is aimed at realization of a new generation of standards for quantum resistance metrology. The project exploits graphene's properties to simplify operation of standards without compromising the unprecedented precision delivered by semiconductor quantum Hall devices. Higher operating temperatures (above 4.2 K, and up to 8 K) and together with lower magnetic fields (below 5 T, and potentially down to 2 T) will lead to a significantly improved and cost-saving dissemination of intrinsically referenced resistance standards to all end-users relying on electrical measurements.

  • 146.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    A host interface to the DTM high speed network1992Conference paper (Refereed)
  • 147.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    A performance model for integrated layer processing1997Conference paper (Refereed)
    Abstract [en]

    Integrated Layer Processing is an implementation technique for data manipulation functions in communication protocols. The purpose of this technique is to increase communication performance. It reduces the number of memory accesses and thus relieves the memory bandwidth bottleneck. Integrated Layer Processing can however, in some situations, substantially increase the number of memory accesses, and therefore instead reduce performance. The main reason is contention for processor registers. We present a performance model that captures the memory behavior of data manipulation functions for both integrated and sequential implementations. By comparing the model to measurements of real and synthetic data manipulation functions, we show that the model accurately predicts the performance. The model can be used to assess whether an integrated implementation will perform better or worse than a sequential implementation. The situations where integration would reduce performance can then be avoided without spending a lot of effort on a more complex integrated implementation.

  • 148.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Improving computer communication performance by reducing memory bandwidth consumption1997Doctoral thesis, monograph (Other academic)
  • 149.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    NetInf Routing Using Hints2013Conference paper (Refereed)
    Abstract [en]

    We define a global routing mechanism for the NetInf protocol, part of the NetInf information-centric networking architecture. The mechanism makes use of two levels of aggregation in order to provide the scalability needed for a global network. An anticipated $10^{15}$ number of individual named data objects are aggregated to in the order of 500K routing hints which are very feasible to handle with existing routing technology. The hints are then used to forward requests for named data towards the publisher.

  • 150.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Andersson, Anders
    Hagsand, Olof
    RISE - Research Institutes of Sweden, ICT, SICS.
    Marsh, Ian
    RISE - Research Institutes of Sweden, ICT, SICS.
    Dimensioning links for IP telephony2001In: Proceedings of the 2nd IP-Telephony Workshop (IPtel 2001), 2-3 April 2001, New York City, New York, USA, 2001, 1Conference paper (Refereed)
    Abstract [en]

    Packet loss is an important parameter for dimensioning network links or traffic classes carrying IP telephony traffic. We present a model based on the Markov modulated Poisson process (MMPP) which calculates packet loss probabilities for a set of super positioned voice input sources and the specified link properties. We do not introduce another new model to the community, rather try and verify one of the existing models via extensive simulation and a real world implementation. A plethora of excellent research on queuing theory is still in the domain of ATM researchers and we attempt to highlight its validity to the IP Telephony community. Packet level simulations show very good correspondence with the predictions of the model. Our main contribution is the verification of the MMPP model with measurements in a laboratory environment. The loss rates predicted by the model are in general close to the measured loss rates and the loss rates obtained with simulation. The general conclusion is that the MMPP-based model is a tool well suited for dimensioning links carrying packetized voice in a system with limited buffer space.

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