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  • 301.
    Aleite, Edgardo
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Gyllström, Joakim
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Mätning av intensitetsbrus i lasrar (RIN)2000Report (Refereed)
  • 302. Alexander, NE
    et al.
    Alderman, B
    Allona, F
    Frijlink, P
    Gonzalo, R
    Hägelen, M
    Ibáñez, A
    Krozer, V
    Langford, ML
    Schikora, M
    Wang, H
    Weber, MA
    TeraSCREEN: Multi-frequency multi-mode Terahertz screening for border checks2014In: Proc. SPIE 9078, Passive and Active Millimeter-Wave Imaging XVII, 2014Conference paper (Other academic)
  • 303.
    Alexandersson, Ellen
    RISE, Swedish ICT, Viktoria.
    Induktiv laddning och hälsoeffekter: RAPPORT - OMVÄRLDSANALYSKRING ELEKTROMAGNETISKAFÄLT VID INDUKTIV LADDNING AVELFORDON2013Report (Other academic)
    Abstract [en]

    Elfordon representerar en av de mest lovande vägarna för att nå en fossiloberoende transportsektor och minska koldioxidutsläpp och luftföroreningar. Induktiv laddning av elfordon öppnar för möjligheten att ladda helt automatiskt vilket många tror kan höja elfordonens attraktionskraft och därmed öka försäljningstakten av elfordon. Dock har diskussioner redan satt igång huruvida läckfält vid energiöverföringen kan påverka människor.

    Elektromagnetiska fält finns naturligt i vår omgivning, men beroende på typ av fält, frekvens och fältstyrka interagerar de med kroppen på olika sätt. Fält för induktionsladdning ligger i ett intermediärt frekvensområde, det vill säga frekvensmässigt mellan kraftfrekventa och radiofrekventa fält. För kraft- och radiofrekventa fält har en hel del forskning genomförts kring fältens kopplingar till biologiska interaktioner och eventuell negativ hälsopåverkan. Utifrån resultaten har rekommendationer för högsta exponeringsnivåer för fälten tagits fram, även om många av resultaten fortfarande är tvetydiga. För de intermediära fälten saknas i stort sett forskning och därför har rekommendationer för dessa fält i stora delar extrapolerats fram utifrån resultat för kraft- och radiofrekvenser.

    Frågorna kring huruvida fält från induktiv laddning kan orsaka hälsoeffekter är därmed fortfarande oklara och därför bör försiktighetsprincipen tillämpas. Vi behöver också koppla samman forskning kring teknikutveckling med forskning som utreder eventuella hälsoeffekter för att höja kunskapsnivån. Därmed kan vi förekomma risken att en debatt blossar upp i samhället där vi står utan svar, vilket skulle kunna påverka elfordonens introduktion i Sverige negativt.

  • 304.
    Alexandersson, Johan
    CBI - Cement- och betonginstitutet.
    Polymercementbetong: Polymer cement concrete1983Report (Refereed)
  • 305.
    Alexandersson, Johan
    CBI - Cement- och betonginstitutet.
    Strength losses in heat cured concrete1972Report (Refereed)
  • 306.
    Alexandersson, Johan
    CBI - Cement- och betonginstitutet.
    Strength losses in heat curing: causes and countermeasures1974Report (Refereed)
  • 307. Alexandrescu, L.
    et al.
    Syverud, K.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Belosi, F.
    Nanofibers against nanoparticles:: Cellulosic nanoparticles for nanoparticle aerosol filtration2012Conference paper (Refereed)
  • 308. Alexandrescu, L.
    et al.
    Syverud, Kristin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Iotti, M.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Gregersen, Ø.
    Belosi, F.
    Gatti, A.M.
    Air filtration of nano-particles using cellulose nanofibrils2012Conference paper (Refereed)
  • 309. Alexandrescu, L.
    et al.
    Syverud, Kristin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Gatti, A.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Cytotoxicity tests of cellulose nanofibril-based structures2013In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 20Article in journal (Refereed)
  • 310. Alexandrova, L
    et al.
    Hanumantha Rao, K
    Forsberg, KSE
    Grigorov, L
    Pugh, RJ
    YKI – Ytkemiska institutet.
    Three-phase contact parameters measurements for silica-mixed cationic-anionic surfactant systems2009In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 348, no 1-3, p. 228-233Article in journal (Refereed)
    Abstract [en]

    The stability and interactions in thin wetting films between the silica surface and air bubble containing (a) straight chain C10 amine and (b) cationic/anionic surfactant mixture of a straight chain C10 amine with sodium C8, C10 and (straight chain) C12 sulfonates, were studied using the microscopic thin wetting film method developed by Platikanov [D. Platikanov, J. Phys. Chem. 68 (1964) 3619]. Film lifetimes, three-phase contact (TPC) expansion rate, receding contact angles and surface tension were measured. The presence of the mixed cationic/anionic surfactants was found to lessen contact angles and suppresses the thin aqueous film rupture, thus inducing longer film lifetime, as compared to the pure amine system. In the case of mixed surfactants heterocoagulation could arise through the formation of positively charged interfacial complexes. Mixed solution of cationic and anionic surfactants shows synergistic lowering in surface tension. The formation of the interfacial complex at the air/solution interface was confirmed by surface tension data. It was also shown, that the chain length compatibility between the anionic and cationic surfactants system controls the strength of the interfacial complex. The observed phenomena were discussed in terms of the electrostatic heterocoagulation theory, where the interactions can be attractive or repulsive depending on the different surface activity and charge of the respective surfactants at the two interfaces.

  • 311. Alexandrova, L
    et al.
    Hanumantha, Rao K
    Forsberg, KSE
    Grigorov, L
    Pugh, Robert J
    YKI – Ytkemiska institutet.
    The influence of mixed cationic-anionic surfactants on the three-phase contact parameters in silica-solution systems2011In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 373, p. 145-151Article in journal (Refereed)
    Abstract [en]

    The formation of thin wetting films on silica surface from aqueous solution of (a) tetradecyltrimetilammonium bromide (C14TAB) and (b) surfactant mixture of the cationic C14TAB with the anionic sodium alkyl- (straight chain C12-, C14- and C16-) sulfonates, was studied using the microscopic thin wetting film method developed by Platikanov. Film lifetimes, three-phase contact (TPC) expansion rates, receding contact angles and surface tension were measured. It was found that the mixed surfactants caused lower contact angles, lower rates of the thin aqueous film rupture and longer film lifetimes, as compared to the pure C14TAB. This behavior was explained by the strong initial adsorption of interfacial complexes from the mixed surfactant system at the air/solution interface, followed by adsorption at the silica interface. The formation of the interfacial complexes at the air/solution interface was proved by means of the surface tension data. It was also shown, that the chain length compatibility between the anionic and cationic surfactants controls the strength of the interfacial complex and causes synergistic lowering in the surface tension. The film rupture mechanism was explained by the heterocoagulation mechanism between the positively charged air/solution interface and the solution/silica interface, which remained negatively charged.

  • 312. Alexandrova, L
    et al.
    Pugh, RJ
    YKI – Ytkemiska institutet.
    Tiberg, F
    YKI – Ytkemiska institutet.
    Grigorov, L
    Confirmation of the heterocoagulation theory of flotation1999In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 15, p. 7464-7471Article in journal (Refereed)
    Abstract [en]

    To model the flotation process, we have used the microscopic method developed by Scheludko to study the stability of an aqueous thin film containing tetradecyltrimethylammonium bromide ( C14TAB ) between an air bubble and a silica substrate. Experiments were performed at a range of C14TAB concentrations and pH values. Spontaneous rupture of the thin aqueous film was interpretated in terms of heterocoagulation resulting from the preferential adsorption of relatively low surfactant concentrations at the vapour/solution interface causing a net positive charge while the solution/silica interface remained negatively charged. In addition, during the the three-phase-contact (TPC) expansion or de-wetting step following film rupture, the movement of TPC across the silica substrate leads to transfer of amine from the vapour/solution interface to the vapour/silica. This process resembles a Langmuir-Blodgett deposition process and emphasized the importance of the solution/vapour interface in the de-wetting process.

  • 313.
    Alexis, Jonas
    et al.
    RISE, Swerea, Swerea MEFOS.
    Björkvall, Johan.
    RISE, Swerea, Swerea MEFOS.
    Mathematical modeling of stirring for an optimized ladle furnace process2011In: AISTech - Iron and Steel Technology Conference Proceedings, 2011, p. 1389-1399Conference paper (Refereed)
    Abstract [en]

    [No abstract available]

  • 314.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Jönsson, P.
    Royal Institute of Technology.
    Jonsson, Lage
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Heating and electromagnetic stirring in a ladle furnace - a simulation model2000In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 40, no 11, p. 1098-1104Article in journal (Refereed)
    Abstract [en]

    A three-dimensional simulation model coupling heating and induction stirring in an ASEA-SKF ladle furnace was developed. Data of the heat transfer from the arcs to the steel bath were predicted in a separate model and included as boundary conditions in a ladle model. The arc model considers the contributions of heat transferred by of each of the following mechanisms: radiation, convection, condensation and energy transported by electrons. Predictions were made to simulate the change of temperature distribution in the ladle during simultaneous heating with electrodes and stirring by induction. A first attempt was made to compare the predictions with measured temperatures from a 100 t ASEA-SKF ladle. The agreement was found to be fairly good when heat-flux data for a 25 cm arc length were used as input to the ladle model. This indicates that the model can be used for more in-depth studies of the effects of heating for ladles that are inductively stirred.

  • 315.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Jönsson, P.G.
    KTH.
    Jonsson, Lage
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    A model of an induction-stirred ladle accounting for slag and surface deformation1999In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 39, no 8, p. 772-778Article in journal (Refereed)
    Abstract [en]

    A 3 dimensional 2-phase model of an induction stirred ladle has been developed. The model is based on fundamental transport equations and includes the solution of steel- and slag-phase. Predicted velocities are in very good agreement with experimental data. Predicted velocities and turbulent kinetic energy dissipation from the model are shown to have linear relationships with input stirring force for different cylindrical ladles. Linear equations forthese relations are presented. Further calculations have shown that these linear equations also are able to predict velocities for a conical ladle. © 1999 ISIJ.

  • 316.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Jönsson, Pär
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    A model of an inductively-stirred ladle1997In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 26, no 2, p. 48-54Article in journal (Refereed)
    Abstract [en]

    A fully 3-dimensional model for an inductively-stirred ladle is presented. Since the fluid flow during induction stirring is not symmetric with respect to the centre of the ladle, this model gives a more accurate description of the real stirring conditions than more traditional models that use cylindrical or polar co-ordinates. Typical output from the model are steel velocities, turbulent kinetic energy and dissipation of turbulent kinetic energy. The calculated steel velocities agree fairly well with experimental data. © Munksgaard, 1997.

  • 317.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Ramirez, M.
    Massachusetts Inst. of Technology.
    Trapaga, G.
    Massachusetts Inst. of Technology.
    Jönsson, P.
    Royal Institute of Technology.
    Modeling of a DC Electric Arc Furnace - heat transfer from the arc2000In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 40, no 11, p. 1089-1097Article in journal (Refereed)
    Abstract [en]

    A mathematical model describing heat and fluid flow in an electric arc has been developed and used to predict heat transfer from the arc to the steel bath in a DC Electric Arc Furnace. The arc model takes the separate contributions to the heat transfer from each involved mechanism into account, i.e. radiation, convection, condensation and energy transported by electrons. The model predicts heat transfer for different currents and arc lengths. Model predictions show that arc efficiency is higher for lower power input. The model also predicts shear stresses and current density distribution at the steel surface. This information can be used as boundary condition input to simulate the effect of heating with electrodes in a DC EAF on the heat and fluid flow in the steel bath.

  • 318.
    Alfredsen, Gry
    et al.
    Norwegian Institute of Bioeconomy Research, Norway.
    Pilgard, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut. Technical University Munich, Germany.
    Fossdal, Carl Gunnar
    Norwegian Institute of Bioeconomy Research, Norway.
    Characterisation of Postia placenta colonisation during 36 weeks in acetylated southern yellow pine sapwood at three acetylation levels including genomic DNA and gene expression quantification of the fungus2016In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 70, no 11, p. 1055-1065Article in journal (Refereed)
    Abstract [en]

    One way to protect timber in service against basidiomycete deterioration is by means of acetylation via reaction with acetic anhydride. The reason why acetylated wood (WAc) is resistant against decay fungi is still not exactly understood. The aim of this study was to contribute to this field of science, and Postia placenta colonisation after 4, 12, 20, 28 and 36 weeks was observed at three acetylation levels of Pinus spp. sapwood. Mass loss (ML) and wood moisture content (MC) data reflected the acetylation levels. The initial equilibrium MC (EMC) proved to be a good indicator of subsequent ML. Genomic DNA quantification showed P. placenta colonisation in all samples, also in samples where no ML were detectable. The number of expressed gene transcripts was limited, but the findings supported the results of previous studies: WAc seems to have some resistance against oxidative mechanisms, which are part of the metabolism of P. placenta. This leads to a delay in decay initiation, a delay in expression of genes involved in enzymatic depolymerisation, and a slower decay rate. The magnitudes of these effects are presented for each acetylation level. The data also imply that there is no absolute decay threshold at high acetylation levels, but instead a significant delay of decay initiation and a slower decay rate.

  • 319. Alfredsen, Gry
    et al.
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek.
    Effects of leaching on Postia placenta decay of acetic anhydride treated wood2013In: Proceedings of the 9th Meeting of the Northern European Network for Wood Science and Engineering, 2013, , p. 209-214Conference paper (Other academic)
  • 320.
    Alfredsen, Gry
    et al.
    Norwegian Forest and Landscape Institute, Norway.
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad.
    Postia placenta decay of acetic anhydride modified wood – effect of leaching2014In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 9, no 3, p. 162-169Article in journal (Refereed)
    Abstract [en]

    It is well established that acetylation of wood by the use of acetic anhydride is able to impart a significant degree of decay resistance. The aim of this work was to study how a standardized leaching procedure with water (EN 84) affected the degradation of acetic anhydride modified samples by the brown rot fungi Postia placenta compared to no leaching prior to incubation. Three different levels (low, medium, and high) of acetic anhydride modified Southern yellow pine (SYP; Pinus spp.) were tested. The samples were harvested after 4 and 28 weeks. Wecompared changes in mass loss, wood moisture content, fungal DNA, and gene expression from five genes. If leaching changes the acetylated samples and makes them more susceptible for fungal deterioration, the expected effect would be higher levels of these parameters. Generally, leaching resulted in few differences between leached and nonleached samples at low levels of acetylation, while no changes were found for the highest acetylation level. No differences were found in gene expressions after 28 weeks. The possible protection of acetylated wood against oxidative fungal degradation is suggested to be interpreted in combination with the lowered wood moisture content.

  • 321. Alfredsen, Gry
    et al.
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek.
    Hietala, Ari
    A step towards a better understanding of fungal colonization of modified wood - QRT-PCR studies2010In: Proceedings of IRG Annual Meeting, 2010, , p. 9Conference paper (Other academic)
  • 322.
    Alfredsen, Gry
    et al.
    Norwegian Forest and Landscape Institute, Norway.
    Ringman, Rebecka
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad. Technical University of Munich, Germany.
    Fossdal, Carl Gunnar
    Norwegian Forest and Landscape Institute, Norway.
    New insight regarding mode of action of brown rot decay of modified wood based on DNA and gene expression studies: A review2015In: International Wood Products Journal, ISSN 2042-6445, E-ISSN 2042-6453, Vol. 6, no 1, p. 5-7Article in journal (Refereed)
    Abstract [en]

    Modified wood shows resistance against wood deteriorating fungi, but the mechanisms are still not fully understood. The aim of this paper was to summarise the molecular studies performed on modified wood with regard to brown rot decay fungi. The DNA data showed that fungi are present inside the laboratory wood test samples already after two weeks of inoculation. Generally the fungal DNA content reflects mass loss and wood moisture content. The oxidative gene expression seems to be higher in modified wood than in untreated wood and it tend to increase during incubation. Based on the gene expression data we suggest that the hypothesis of lack of substrate recognition by the fungus should be rejected. In the reviewed studies, total wood moisture content in the samples was generally not low enough to inhibit fungal colonisation. Hence, moisture distribution within the wood should be studied more closely.

  • 323. Alfredsen, Gry
    et al.
    Westin, Mats
    SP - Sveriges Tekniska Forskningsinstitut / Trätek.
    Durability of modified wood – Laboratory vs field performance2009In: Proceedings of The Fourth European Conference on Wood Modification., SP Technical Research Institute of Sweden , 2009, , p. 515-522Conference paper (Other academic)
  • 324.
    Alfredson, J.
    et al.
    SAAB, Sweden.
    Johansson, B. J. E.
    Linköping University, Sweden.
    Trabasso, L. G.
    Aeronautics Institute of Technology, Brazil.
    Schminder, J.
    Linköping University, Sweden.
    Granlund, R.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Gårdhagen, R.
    Linköping University, Sweden.
    Design of a distributed human factors laboratory for future air systems2018In: 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018, 2018Conference paper (Refereed)
    Abstract [en]

    This paper presents a rationale for structuring a distributed human factors laboratory for future air systems. The distributed herein refers to two aspects: content and geographic. As for content, the laboratory is structured in two levels, namely, individual, and team. As for geographic, the laboratory infrastructure is distributed in three physically separate facilities, namely, Department of Computer and Information Science (IDA) and Department of Management and Engineering (IEI) from Linköping University - Sweden and the Competence Center in Manufacturing from the Aeronautics Institute of Technology (ITA) - Brazil.

  • 325.
    Alfredsson, Robert
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Jarl, Marie-Louice
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Bestämning av sammansättning hos PVC-produkter från gamla hus.1999Report (Refereed)
  • 326.
    Alfthan, Johan
    RISE, Innventia.
    Experimental study of non-linear stress relaxation and creep of paper materials and the relation between the two types of experiments2010In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 25, no 3, p. 351-357Article in journal (Refereed)
    Abstract [en]

    The non-linear time-dependent mechanical behaviour of three different commercial paper grades was investigated. Stress relaxation and creep tests were carried out in MD and CD using different load levels. The strain in each test was split in a linear part and a non-linear part. From the stress and the linear part of the strain in the test, a stress relaxation modulus or a creep compliance was calculated. The stress relaxation moduli and creep compliances determined in this way were observed to be independent of the load level. The stress relaxation moduli and creep compliances for each paper were further independent of the loading direction (MD/CD) when scaled by the elastic modulus. It was also shown that the stress relaxation modulus was approximately equal to the inverse of the creep compliance, which is what would have been expected if linear viscoelastic theory had been applicable.

  • 327.
    Alfthan, Johan
    et al.
    RISE, Innventia.
    Björklund, Magnus
    Measuring creep with confidence2014Conference paper (Refereed)
  • 328.
    Algehed, Jessica
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi.
    Winnes, Kajsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Systemanalys.
    Miljökultur: vad vet forskarna om kulturens och tjänsternas miljöpåverkan2010Report (Refereed)
    Abstract [sv]

    Denna rapport är en översikt av vad vi har funnit hittills i den vetenskapliga litteraturen om kulturens och tjänsternas miljöpåverkan.

  • 329.
    Algerbo, Per-Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Lokalt omhändertagande av icke avvattnat avloppsslam1997Report (Refereed)
  • 330.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Dalemo, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Sammanfattning av seminariet1997Report (Refereed)
  • 331.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Mattson, Lennart
    Thylén, Lennart
    Skörderelaterad kvävegödsling: teknik, metodik och erfarenheter2003Report (Refereed)
  • 332.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Ringmar, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Norén, Olle
    Torén, Anna
    Behandling av ventilationsluft från svinstall med ozon: en utvärdering2003Report (Refereed)
  • 333.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Ringmar, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Torén, Anna
    Luktreducering av gödsel med hjälp av ozon: kompletterande mätningar2001Report (Refereed)
  • 334.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Thylén, Lars
    Utveckling av on-line proteinsensor för skördetröskor2000Report (Refereed)
  • 335.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Thylén, Lars
    Mattsson, Lennart
    Mineralkvävevariationer inom fält2000Report (Refereed)
  • 336.
    Ali, Khayri Mohammed
    RISE - Research Institutes of Sweden, ICT, SICS.
    A method for implementing out in parallel execution of Prolog1987Report (Other academic)
    Abstract [en]

    A method for implementing cut in parallel execution of Prolog is presented. It takes advantages of the efficient implementation of cut in the sequential WAM. It restricts the parallelism, however, it is simple and adds a small extra overhead over the sequential scheme. The method can be used in parallel execution of Prolog on shared amd nonshared memory multiprocessors.

  • 337.
    Ali, Khayri Mohammed
    RISE, Swedish ICT, SICS.
    A Simple Generational Real-time Garbage Collection Scheme1998In: New generation computing, ISSN 0288-3635, E-ISSN 1882-7055, Vol. 16, p. 201-221Article in journal (Refereed)
  • 338.
    Ali, Khayri Mohammed
    RISE - Research Institutes of Sweden, ICT, SICS.
    OR parallel execution of horn clause programs based on WAM and shared control information1988Report (Other academic)
    Abstract [en]

    A method for OR parallel execution of Horn clause programs on a shared memory multiprocessor is presented. The shared memory contains only control information that guide processors requesting a job to independently construct the environment required to get a new job from the other processors without degrading the performance. Each processor has a local memory containing its own binding environment. This reduces the traffic to the shared memory and allows each processor to process its job with high performance. Each processor is almost the same as the Warren Abstract Machine (WAM). Modification to the WAM for supporting the method is described in detail. A method for nonshared memory multiprocessor architecture is outlined.

  • 339.
    Ali, Khayri Mohammed
    RISE - Research Institutes of Sweden, ICT, SICS.
    OR parallel execution of Prolog on BC-machine1988Report (Other academic)
    Abstract [en]

    We present the principles of OR-parallel execution of Prolog on a special parallel inference machine, named BC-machine. The machine is a combined local and shared memory multiprocessor with a special interconnection network. The network allows write operations of an active processor to be broadcasted to several idle processors simultaneously. The shared memory is mainly used for sharing some control information among processors in the system. The amount of shared control information is small and accessed relatively seldom. The execution model is based on the local address space approach. It allows all the technology developed for standard Prolog to be used without loss of efficiency. We expect that the model substantially reduces the copying overhead in comparision with all previous related models. This reduction is due to our new idea of dynamic load balancing and the broadcast mechanism supported by the network. A prototype system of 9 processors is under construction at the Swedish Institute of Computer Science in Stockholm.

  • 340.
    Ali, Khayri Mohammed
    RISE, Swedish ICT, SICS.
    OR-Parallel Execution of Prolog on a Multi-Sequential Machine1986Report (Refereed)
    Abstract [en]

    Based on extending the sequential execution model of Prolog to include parallel execution, we present a method for OR-parallel execution of Prolog on a multiprocessor system. The method reduces the overhead incurred by parallel processing. It allows many processing elements (PEs) to process simultaneously a common branch of a search tree, and each of these PEs creates its local environment and selects a subtree for processing without communication. The run-time overhead is small: simple and efficient operations for selecting the proper subtree. Communication is necessary only when some PEs have exhausted their search spaces and there are others still searching for solutions. The method is able to utilize most of the technology devised for sequential implementation of Prolog. It is optimized for an architecture which supports broadcast copying.

  • 341.
    Ali, Khayri Mohammed
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Haridi, Seif
    RISE, Swedish ICT, SICS, Computer Systems Laboratory.
    Global garbage collection for distributed heap storage systems1987Report (Other academic)
    Abstract [en]

    We present a garbage-collection algorithm, suitable for loosely-coupled multiprocessor systems, in which the processing elements (PE's) share only the communication medium. The algorithm is global, i.e. it involves all the PE's in the system. It allows space compaction, and it uses a system-wide marking phase to mark all accessible objects where a combination of parallel breadth-first/depth-first strategies is used for tracing the object-graphs according to a decentralized credit mechanism that regulates the number of garbage collection messages in the system. The credit mechanism is crucial for determining the space requirement of the garbage-collection messages. Also a variation of the above algorithm is presented for systems with high locality of reference. It allows each PE to perform first its local garbage collection and only invokes the global garbage collection when the freed space by the local collector is insufficient.

  • 342.
    Ali, Khayri Mohammed
    et al.
    RISE, Swedish ICT, SICS.
    Karlsson, Roland
    RISE, Swedish ICT, SICS.
    The Engine-Scheduler Interface used in the Muse OR-parallel Prolog System1992Report (Other academic)
    Abstract [en]

    Almost any sequential Prolog system is in principle easy to extend for OR-parallelism, using the Muse execution model. To reduce your programming effort we have implemented the Muse scheduler, with a clean interface to the Prolog sequential engine. This interface is implemented as a set of C macros. The sequential Prolog system to be parallelized uses some of those macros provided by the Muse scheduler and must also provide some macros for the Muse scheduler. This chapter paper contains a definition and description of the required macros, emphasizing information needed by the Prolog engine programmer.

  • 343.
    Ali, Khayri Mohammed
    et al.
    RISE, Swedish ICT, SICS.
    Karlsson, Roland
    RISE, Swedish ICT, SICS.
    Mudambi, Shyam
    Performance of Muse on Switch-Based Multiprocesor Machines1992Report (Other academic)
    Abstract [en]

    The Muse (multiple sequential Prolog engines) approach has been used to make a simple and efficient OR-parallel implementation of the full Prolog language. The performance results of the Muse system on bus-based multiprocessor machines have been presented in previous chapters, papers. This chapter paper discusses the implementation and performance results of the Muse system on switch-based multiprocessors (the BBN Butterfly GP1000 and TC2000). The results of Muse execution show that high real speedups can be achieved for Prolog programs that exhibit coarse-grained parallelism. The scheduling overhead is equivalent to around 8 -- 26 Prolog procedure calls per task on the TC2000. The chapter paper also compares the Muse results with corresponding results for the Aurora OR-parallel Prolog system. For a large set of benchmarks, the results are in favor of the Muse system.

  • 344.
    Ali, Khayri Mohammed
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Wong, Milton
    An investigation of an OR parallel execution model for horn clause programs1988Report (Other academic)
    Abstract [en]

    We present a model for OR parallel execution of Horn clause programs on a combined local and shared memory multiprocessor system. In this model, the shared memory only contains control information that guides processors requesting a job to independently construct the environment required to get a new job. Each processor has a local memory containing its own binding environment. This reduces the traffic to the shared memory and allows each processor to process its job with high performance. Each processor is almost the same as Warren's Abstract Machine (WAM). A method for nonshared memory multiprocessor architectures is outlined. We also present some preliminary results of an experimental investigation of the model.

  • 345. Ali, L.
    et al.
    Alsanius, B.W.
    Rosberg, A.K.
    Svensson, B.
    Nielsen, Tim
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Olsson, M.E.
    Effects of nutrition strategy on the levels of nutrients and bioactive compounds in blackberries2012In: European Food Research and Technology, ISSN 1438-2377, E-ISSN 1438-2385, Vol. 234, no 1, p. 33-44Article in journal (Refereed)
    Abstract [en]

    The effects of nutrition strategy on levels of nutrients and bioactive compounds in fruit and leaves of blackberries were studied in greenhouse-grown blackberry plants fertilised with combinations of two levels (low, high) of nitrogen (60 and 100 kg ha -1, respectively) and potassium (66.4 and 104 kg ha -1, respectively). Plant concentrations of organic phytochemicals were quantitatively analysed by high-performance liquid chromatography. High amounts of both fertilisers produced high amounts of all nutrients and bioactive compounds analysed in fruit except total acidity and ellagic acid. There were major differences in compounds affecting taste in fruit, e. g., sugars (fructose and glucose), total soluble solids and pH, and also in anthocyanin content. The concentrations of secondary metabolites, vitamin C and ellagic acid in fruit also varied significantly between treatments, although the differences were smaller. Storage of blackberries showed variable effects in the different levels of compounds, and the changes found were small. Nutrient regime did not affect blackberry leaves to the same extent, and only minor changes were found. The findings show that by optimising plant nutrition, phytonutrient levels can be maximised and maintained in fresh and stored berry crops, especially those grown in greenhouses, where conditions can easily be regulated. © 2011 Springer-Verlag.

  • 346.
    Ali, Muneeb
    et al.
    RISE, Swedish ICT, SICS.
    Umar, Saif
    Dunkels, Adam
    RISE, Swedish ICT, SICS.
    Voigt, Thiemo
    RISE, Swedish ICT, SICS, Computer Systems Laboratory.
    Römer, Kay
    Langendoen, Koen
    Polastre, Joseph
    Uzmi, Zartash Afzal
    Medium access control issues in sensor networks2006In: Computer communication review, ISSN 0146-4833, E-ISSN 1943-5819, Vol. 36, p. 33-36Article in journal (Refereed)
    Abstract [en]

    Medium access control for wireless sensor networks has been a very active research area for the past couple of years. The sensor networks literature presents an alphabet soup of medium access control protocols with almost all of the works focusing only on energy efficiency. There is much more innovative work to be done at the MAC layer, but current efforts are not addressing the hard unsolved problems. Majority of the works appearing in the literature are "least publishable incremental improvements" over the popular S-MAC [1] protocol. In this paper we present research directions for future medium access research. We identify some open issues and discuss possible solutions.

  • 347.
    Ali, Muneeb
    et al.
    RISE, Swedish ICT, SICS.
    Voigt, Thiemo
    RISE, Swedish ICT, SICS, Computer Systems Laboratory.
    Uzmi, Zartash Afzal
    Mobility Management in Sensor Networks2006Conference paper (Refereed)
  • 348.
    Ali, Noman Mumtaz
    et al.
    CNS.
    Potys, Robert
    RISE, Swedish ICT, SICS. IMIT.
    Implementation and Evaluation of NetInf TP, an Information-centric Transport Protocol2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In recent times, there has been a significant growth in the number of Internet users, resulting in an increased demand for different types and amounts of content. As content distribution over the Internet has become a key issue, one proposal is that the Internet architecture could evolve to a more ``Information-Centric'' paradigm instead of the currently designed ``Host-Centric'' paradigm. In the host-based architecture, the data is often restricted to a location and will become unavailable if the host holding the data (or network connection) becomes unreachable. With the Information-centric data approach, the requestor requests data and receives it regardless of where the data actually originated from. Hence, the focus moves from ``where'' to ``what'' one is interested in. The heterogeneity of access methods and devices makes this type of approach even more appealing, especially when caching of data at intermediate points can be achieved. The prototype developed in the thesis builds an important part of the Information-Centric vision, that is a receiver-driven transport protocol. This is in contrast to the host-centric transport protocols which are always source driven. The advantage of having the receiver driven feature is to allow for multiple senders or receivers of the same data. That is, one receiver may ask more than one holder to send different pieces of the same file. We have implemented, simulated and assessed the performance of the proposed protocol, hereby called NetInf TP. Since the protocol may have to co-exist with existing sender driven TCP implementations for some time, we have looked at the inter-operation of NetInf TP with TCP variants from both qualitative and quantitative perspectives.

  • 349.
    Aliasgari, Mahdis
    et al.
    Lighting Design Collective, Spain.
    Clark, Brendon
    RISE - Research Institutes of Sweden, ICT, Interactive.
    Baby steps or stage dive into a critical design dialogue2017In: Interaction design & architectures Journnal IxD&A, ISSN 1826-9745, Vol. 2017, no 32, p. 38-47Article in journal (Refereed)
    Abstract [en]

    This paper puts forward the early, practical actions "in context" that can begin to sensitize, orient, expand, and constrain design dialogue at the outset of a design effort. Drawing on a case of "breaching experiments" in "non-places" we explore a "first approximation" of interventionist participation into the context of future interactive & responsive design interventions. By introducing a design journey, we have shed a light on how a human-centric approach, applied to the context of Human Building Interaction (HBI), can support an interventionist design dialogue between people and designed environment through processes of stirring up what's beyond 'norms' of interaction.

  • 350.
    Alima, Luc Onana
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ghodsi, Ali
    RISE - Research Institutes of Sweden, ICT, SICS.
    Haridi, Seif
    RISE - Research Institutes of Sweden, ICT, SICS.
    A Framework for Structured Peer-to-Peer Overlay Networks2004Report (Other academic)
    Abstract [en]

    Structured peer-to-peer overlay networks have recently emerged as good candidate infrastructure for building novel large-scale and robust Internet applications in which participating peers share computing resources as equals. In the past three year, various structured peer-to-peer overlay networks have been proposed, and probably more are to come. We present a framework for understanding, analyzing and designing structured peer-to-peer overlay networks. The main objective of the paper is to provide practical guidelines for the design of structured overlay networks by identifying a fundamental element in the construction of overlay networks: the embedding of k-ary trees. Then, a number of effective techniques for maintaining these overlay networks are discussed. The proposed framework has been effective in the development of the DKS system.

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