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  • 20601.
    Åkesson, Karl-Petter
    et al.
    RISE, Swedish ICT, SICS. ICE.
    Bullock, Adrian
    Rodden, Tom
    A toolkit for user re-configuration of ubiquitous domestic environments2002Conference paper (Refereed)
    Abstract [en]

    This paper describes a distributed system with the aim to allow inhabitants to re-configure arrangements of devices and to understand the behaviour of these devices in tandem by making visible the various configurations. The purpose is to address the evolutionary nature of the domestic environments. We describe two different configuration facilities and the underlying infrastructure.

  • 20602.
    Åkesson, Karl-Petter
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ljungberg, Fredrik
    Coupling real and virtual environments1998Conference paper (Refereed)
  • 20603.
    Åkesson, Karl-Petter
    et al.
    RISE, Swedish ICT, SICS. ICE.
    Nilsson, Andreas
    Designing Leisure Applications for the Mundane Car-Commute.2002In: Personal and Ubiquitous Computing, ISSN 1617-4909, E-ISSN 1617-4917, Vol. 6, p. 176-187Article in journal (Refereed)
    Abstract [en]

    Commuting by car from home to work can be very time consuming. We have conducted a study to explore what people are doing, and want to do, while commuting. People use their time in the car on a wide variety of activities with great innovation. There was no unanimous activity that everyone wanted, rather a wide variety of activities were requested. Three different categories of activity were identified which we refer to as mundane, vocational and traffic related. To demonstrate a possible IT service supporting commuters, a prototype based on speech output and a simple input mechanism from a wheel was developed. This service moves sampling of music from the conventional shop into the car. The prototype was informally tested with users, which resulted in a number of improvements. Preliminary user results indicate good functionality, a comprehensive interaction interface.

  • 20604.
    Åkesson, Karl-Petter
    et al.
    RISE, Swedish ICT, SICS. ICE.
    Simsarian, Kristian
    RISE, Swedish ICT, SICS. ICE.
    Reality Portals1999Conference paper (Refereed)
    Abstract [en]

    Through interactive augmented virtuality we provide the ability to interactively explore a remote space inside a virtual environment. This paper presents a tool and technique that can be used to create such virtual worlds that are augmented by video textures taken of real world objects. The system constructs and updates, in near real-time, a representation of the user-defined salient and relevant features of the real world. This technique has the advantage of constructing a virtual world that contains the relevant video-data of the real world, while maintaining the flexibility of a virtual world. The virtual-real world representation is not dependent on physical location and can be manipulated in a way not subject to the temporal, spatial, and physical constraints found in the real world. Another advantage is that spatializing the video-data may afford more intuitive examination.

  • 20605.
    Åkesson, Urban
    Brandteknik, material (BRm).
    Characterisation of microcracks in the Bohus granite, western Sweden, caused by uniaxial cyclic loading.2004In: Engineering Geology, Vol. 72, no 1&2, p. 131-142Article in journal (Refereed)
  • 20606.
    Åkesson, Urban
    Brandteknik, material (BRm).
    Image analysis - a method to determine the mechanical properties of granites2001In: Proceedings of the 8th Euroseminar on Microscopy Applied to Buildings Materials, 2001, , p. 497-502Conference paper (Other academic)
  • 20607.
    Åkesson, Urban
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Bygg och Mekanik. University of Gothenburg .
    Numerical description of rock texture by using image analysis and quantitative microscopy: alternative method for the assessment of the mechanical properties of rock aggregates2001Licentiate thesis, monograph (Other academic)
  • 20608.
    Åkesson, Urban
    Brandteknik, material (BRm).
    Relationship between microstructure and the bowing properties of calcite marble.2006In: Bulletin of Engineering Geology and the Environment, Vol. 65, no 1, p. 73-79Article in journal (Refereed)
  • 20609.
    Åkesson, Urban
    Brandteknik, material (BRm).
    Relationship between texture and mechanical properties of granites, central Sweden, by the use of image analysis techniques2001In: Bulletin of Engineering Geology and the Environment, Vol. 60, p. 277-284Article in journal (Other academic)
  • 20610.
    Åkesson, Urban
    Brandteknik, material (BRm).
    The influence of foliation on the fragility of granitic rocks, image analysis and quantitative microscopy.2003In: Engineering Geology, Vol. 68, p. 275-288Article in journal (Other academic)
  • 20611.
    Åkesson, Urban
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB.
    Döse, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB.
    Olika stenmaterials inverkan på partikelmängd från dubbdäckslitage2010In: CBI-nytt, ISSN 0349-2060, no 1, p. 2-3Article in journal (Other academic)
  • 20612.
    Åkesson, Urban
    et al.
    Brandteknik, material (BRm).
    Lindqvist, Jan-Erik
    Brandteknik, material (BRm).
    Geometric Characterisation of crushed fine Aggregates by use of Image Analysis Nordtest project No 040262006Report (Refereed)
    Abstract [en]

    Crushed rock becomes more and more common as aggregate in concrete, due to the restriction to use natural gravel. Today crushed aggregate is commonly used from the size of 8 mm and upwards. Natural gravel is still used for the finer gradings. The problem with using crushed aggregate for the finer fractions is that the material is often too flaky and elongated, especially in the 0-2 mm fraction. In order to use crushed aggregate in all fractions in concrete it is important to have more knowledge about the rock material, crushing techniques and the influence on rheology of the concrete. In this project, a method has been developed to describe the geometrical characteristics of crushed fine aggregates. The materials have been sieved into different fractions and sample for analysis have been prepared for three different fractions. The method is based on image analysis where images of the material are taken with scanning electron microscopy and optical microscopy. To geometrically characterise the material, two parameters have been measured, Fmin/Fmax and F-aspect. The results show that this method is quite robust and that there is no significant difference between the two measured parameters.

  • 20613.
    Åkesson, Urban
    et al.
    Brandteknik, material (BRm).
    Lindqvist, Jan-Erik
    Brandteknik, material (BRm).
    Relationship between texture and mechanical properties of granites, central Sweden, by the use of image analysis techniques2001In: Bulletin of Engineering Geology and the Environment, Vol. 60, p. 277-284Article in journal (Other academic)
  • 20614.
    Åkesson, Urban
    et al.
    Brandteknik, material (BRm).
    Lindqvist, Jan-Erik
    Brandteknik, material (BRm).
    Schouenborg, Björn
    Brandteknik, material (BRm).
    Realtionship between microstructure and bowing properties of calcite marble claddings2005In: Bulletin of Engineering Geology and the Environment., Vol. 65, no 1, p. 73-79Article in journal (Other (popular science, discussion, etc.))
  • 20615.
    Åkesson, Urban
    et al.
    Brandteknik, material (BRm).
    Lindqvist, Jan-Erik
    Brandteknik, material (BRm).
    Schouenborg, Björn
    Brandteknik, material (BRm).
    Relationship between microstructure and bowing properties of calcite marble claddings.2005In: Bulletin of Engineering Geology and the Environment, Vol. 65, p. 73-79Article in journal (Refereed)
  • 20616.
    Ålander, Eva
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy.
    ֖stlund, Ida
    RISE - Research Institutes of Sweden, Bioeconomy.
    Lindgren, Karin
    RISE - Research Institutes of Sweden, Bioeconomy.
    Johansson, Malin
    RISE - Research Institutes of Sweden, Bioeconomy.
    Gimåker, Magnus
    RISE - Research Institutes of Sweden, Bioeconomy.
    Towards a more cost-efficient paper and board making using microfibrillated cellulose2017In: The 7th Nordic Wood Biorefinery Conference held in Stockholm, Sweden, 28-30 Mar. 2017: NWBC 2017, Stockholm: RISE Bioekonomi , 2017, p. 49-54Conference paper (Refereed)
    Abstract [en]

    The economic potential in terms of variable cost needed for production of fine paper has been evaluated for a case where microfibrillated cellulose (MFC) was added in order to increase the filler content at maintained grammage and tensile index. MFC production was based on a mechanical enzymatic pretreatment procedure prior to high-pressure homogenisation. Two different scenarios were studied: without and with wet end starch. For cost evaluation, it was assumed that the cost for production MFC had been calculated from the pulp and enzyme price and energy needed for refining and homogenisation. Although the pulp used was a never-dried bleached softwood sulphite pulp, the price was assumed to be equal to that for bleached kraft pulp. Techno-economic analysis was based on a pilot scale trial using a mobile demonstration plant with a capacity to produce 100kg MFC. The plant consisted of a three-stage process: enzyme treatment, refining and homogenisation. It has been concluded that the use of MFC as a strength additive had a positive impact on the variable costs for a fine paper case when increasing the filler content.

  • 20617.
    Ålgårdh Karlsson, Joakim
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik. Uppsala University, Sweden.
    Horn, Timothy
    North Carolina State University, US.
    West, Harvey
    North Carolina State University, US.
    Aman, Ronald
    North Carolina State University, US.
    Snis, Anders
    Arcam AB, Sweden.
    Engqvist, Håkan
    Uppsala University, Sweden.
    Lausmaa, Jukka
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Harrysson, Ola
    North Carolina State University, US.
    Thickness dependency of mechanical properties for thin-walled titanium parts manufactured by Electron Beam Melting (EBM)®2016In: Additive Manufacturing, ISSN 2214-8604, Vol. 12, p. 45-50Article in journal (Refereed)
    Abstract [en]

    Metal powder bed additive manufacturing technologies, such as the Electron Beam Melting process, facilitate a high degree of geometric flexibility and have been demonstrated as useful production techniques for metallic parts.However, the EBM process is typically associated with lower resolutions and higher surface roughness compared to similar laser-based powder bed metal processes. In part, this difference is related to the larger powder size distribution and thicker layers normally used. As part of an effort to improve the resolution and surface roughness of EBM fabricated components, this study investigates the feasibility of fabricating components with a smaller powder size fraction and layer thickness (similar to laser based processes). The surface morphology, microstructure and tensile properties of the produced samples were evaluated. The findings indicate that microstructure is dependent on wall-thickness and that, for thin walled structures, tensile properties can become dominated by variations in surface roughness.

  • 20618. Åmand, HL
    et al.
    Nordén, B
    Fant, K
    YKI – Ytkemiska institutet.
    Functionalization with C-terminal cysteine enhances transfection efficiency of cell-penetrating peptides trough dimer formation2012In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 418, no 3, p. 469-474Article in journal (Refereed)
    Abstract [en]

    Cell-penetrating peptides have the ability to stimulate uptake of macromolecular cargo in mammalian cells in a non-toxic manner and therefore hold promise as efficient and well tolerated gene delivery vectors. Non-covalent peptide-DNA complexes (" peptiplexes") enter cells via endocytosis, but poor peptiplex stability and endosomal entrapment are considered as main barriers to peptide-mediated delivery. We explore a simple, yet highly efficient, strategy to improve the function of peptide-based vectors, by adding one terminal cysteine residue. This allows the peptide to dimerize by disulfide bond formation, increasing its affinity for nucleic acids by the "chelate effect" and, when the bond is reduced intracellularly, letting the complex dissociate to deliver the nucleic acid. By introducing a single C-terminal cysteine in the classical CPP penetratin and the penetratin analogs PenArg and EB1, we show that this minor modification greatly enhances the transfection capacity for plasmid DNA in HEK293T cells. We conclude that this effect is mainly due to enhanced thermodynamic stability of the peptiplexes as endosome-disruptive chloroquine is still required for transfection and the effect is more pronounced for peptides with lower inherent DNA condensation capacity. Interestingly, for EB1, addition of one cysteine makes the peptide able to mediate transfection in absence of chloroquine, indicating that dimerisation can also improve endosomal escape properties. Further, the cytotoxicity of EB1 peptiplexes is considerably reduced, possibly due to lower concentration of free peptide dimer resulting from its stronger binding to DNA.

  • 20619. Åmand, Linda
    et al.
    Andersson, S
    Arnell, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut. Urban Water Management AB.
    Junestedt, C
    Rahmberg, M
    Lindblom, E
    Thunberg, A
    Nillsson, A
    SIMULATING THE ENVIRONMENTAL IMPACT OF STRICTER NITROGEN AND PHOSPHOROUS DISCHARGE CRITERIA2015Conference paper (Other academic)
  • 20620.
    Åmand, Linda
    et al.
    IVL Svenska Miljöinstitutet, Sweden.
    Andersson, Sofia
    IVL Svenska Miljöinstitutet, Sweden.
    Oliveira, Felipe
    IVL Svenska Miljöinstitutet, Sweden.
    Rahmberg, Magnus
    IVL Svenska Miljöinstitutet, Sweden.
    Junestedt, Christian
    IVL Svenska Miljöinstitutet, Sweden.
    Arnell, Magnus
    RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.
    Nya utsläppskrav för svenska reningsverk – effekter på reningsverkens totala miljöpåverkan2016Report (Other academic)
  • 20621.
    Ånmark, Niclas
    et al.
    RISE - Research Institutes of Sweden, Materials and Production, KIMAB. KTH Royal Institute of Technology, Sweden.
    Björk, Thomas
    RISE - Research Institutes of Sweden, Materials and Production, KIMAB.
    Ganea, Anna
    Sandvik Coromant, Sweden.
    Ölund, Patrik
    Ovako, Sweden.
    Hogmark, Sture
    Uppsala University, Sweden.
    Karasev, Andrey
    KTH Royal Institute of Technology, Sweden.
    Jönsson, Pär Göran
    KTH Royal Institute of Technology, Sweden.
    The effect of inclusion composition on tool wear in hard part turning using PCBN cutting tools2015In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 334-335, p. 13-22Article in journal (Refereed)
    Abstract [en]

    This work reports on hard part turning of carburizing steels using a PCBN cutting tool in fine machining. Emphasis is on the link between composition of the inclusions in work material and wear mechanisms of the cutting tool. A Ca-treated machinability improved 20NiCrMo steel was included together with three other carburizing steels with different inclusion characteristics. Machining tests were conducted to examine cutting tool life and its balance between excessive flank wear and crater wear. The wear mechanisms were examined using a scanning electron microscope (SEM) equipped with an energy dispersive X-ray spectrometer (EDS) and a secondary electron (SE) detector.The longest tool life was obtained when cutting the Ca-treated steel. The improved machinability is linked to the deposition of complex (Mn,Ca)S and (Ca,Al)(O,S) protective slag layers that form on the rake face of the cutting tool during machining. Cutting in this steel also resulted in a typical ridge formation in the tool edge crater. Transfer of workpiece material to the rake face crater is characteristic in hard part turning of steel with high cleanliness. This is suggested to be related to the lack of the sulfides that lubricate conventional machinability treated steels, and that the crater wear of low-sulfur steel is more pronounced than for steels with higher sulfur content.

  • 20622.
    Ånmark, Niclas
    et al.
    RISE - Research Institutes of Sweden, Materials and Production, KIMAB. KTH Royal Institute of Technology, Sweden.
    Karasev, Andrey
    KTH Royal Institute of Technology, Sweden.
    Jönsson, Pär Göran
    KTH Royal Institute of Technology, Sweden.
    The effect of different non-metallic inclusions on the machinability of steels2015In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 8, no 2, p. 751-783Article, review/survey (Refereed)
    Abstract [en]

    Considerable research has been conducted over recent decades on the role of non-metallic inclusions and their link to the machinability of different steels. The present work reviews the mechanisms of steel fractures during different mechanical machining operations and the behavior of various non-metallic inclusions in a cutting zone. More specifically, the effects of composition, size, number and morphology of inclusions on machinability factors (such as cutting tool wear, power consumption, etc.) are discussed and summarized. Finally, some methods for modification of non-metallic inclusions in the liquid steel are considered to obtain a desired balance between mechanical properties and machinability of various steel grades.

  • 20623.
    Åsberg, M.
    et al.
    Karlstad University, Sweden.
    Fredriksson, G.
    Karlstad University, Sweden.
    Hatami, Seperh
    RISE - Research Institutes of Sweden, Swerea, Swerea IVF.
    Fredriksson, W.
    Bodycote Hot Isostatic Pressing AB, Sweden.
    Krakhmalev, P.
    Karlstad University, Sweden.
    Influence of post treatment on microstructure, porosity and mechanical properties of additive manufactured H13 tool steel2019In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 742, p. 584-589Article in journal (Refereed)
    Abstract [en]

    Additive manufacturing (AM) is an attractive manufacturing technology in tooling applications. It provides unique opportunities to manufacture tools with complex shapes, containing inner channels for conformal cooling. In this investigation, H13, a widely used tool steel, was manufactured using a laser powder bed fusion method. Microstructure, tensile mechanical properties, hardness, and porosity of the AM H13 after stress relieve (SR), standard hardening and tempering (SR + HT), and hot isostatic pressing (SR + HIP + HT) were investigated. It was found that the microstructure of directly solidified colonies of prior austenite, which is typical for AM, disappeared after austenitizing at the hardening heat treatment. In specimens SR + HT and SR + HIP + HT, a microstructure similar to the conventional but finer was observed. Electron microscopy showed that SR and SR + HT specimens contained lack of fusion, and spherical gas porosity, which resulted in remarkable scatter in the observed elongation to break values. Application of HIP resulted in the highest strength values, higher than those observed for conventional H13 heat treated in the same way. The conclusion is that HIP promotes reduction of porosity and lack of fusion defects and can be efficiently used to improve the mechanical properties of AM H13 tool steel.

  • 20624.
    Åslund, Peter
    et al.
    RISE, STFI-Packforsk.
    Vomhoff, H.
    RISE, STFI-Packforsk.
    Dewatering mechanisms and their influence on suction box dewatering processes: A literature review2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 4, p. 389-397Article, review/survey (Refereed)
    Abstract [en]

    This review summarizes the present knowledge of suction box dewatering mechanisms. In addition, existing and novel suction box dewatering processes are described for applications in the pulp and paper industry. Three mechanisms that determine the dry content of the web after suction box dewatering are identified, viz. web compression, displacement of water by air, and rewetting. Earlier work focused mainly on the influence of web properties and process parameters for the achievable dry content. That work did not give any information concerning the relative importance of the three mechanisms. There was no measurement of web compression or water displacement. Furthermore, the occurrence of rewetting was neglected by many researchers. A deeper knowledge and, above all, direct measurements are required to better describe suction box dewatering. Some interesting modified suction box dewatering processes were presented in the literature. For example, the use of a membrane on top of the web during dewatering is believed to have the potential for an increase in dry content and energy savings. This increase in dry content is consequently believed to be a result of an increase in web compression.

  • 20625.
    Åslund, Peter
    et al.
    RISE, Swerea, Swerea KIMAB.
    Vomhoff, H.
    STFI-Packforsk AB.
    Waljanson, A.
    STFI-Packforsk AB.
    The deformation of chemical and mechanical pulp webs during suction box dewatering2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 4, p. 403-408Article in journal (Refereed)
    Abstract [en]

    The deformation of the paper web during and after a suction pulse on initially saturated fibre web made of chemical and mechanical pulp was investigated. A laboratory suction box was used, where the suction time and pressure drop could be varied and controlled. During the experiments, the web thickness, the air flow through the web and the suction pressure were recorded and after the experiments, the dry content of the web was determined. A large deformation was observed when the suction pulse was applied. After the suction pulse, a considerable expansion of the web took place, probably an effect of rewetting. The compression of the web appeared to be the most important dewatering mechanism increasing the dry content of the web. However, if the web is not separated from the forming fabric, rewetting after the suction pulse will greatly reduce the dry content.

  • 20626.
    Ņslund, Peter
    et al.
    RISE, STFI-Packforsk.
    Vomhoff, Hannes
    RISE, STFI-Packforsk.
    Evaluation of membrane-assisted dewatering on a pilot paper machine2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 2, p. 152-155Article in journal (Refereed)
    Abstract [en]

    A membrane-assisted dewatering process was evaluated on a pilot paper machine. In this process, a membrane is located on top of the wet web when it passes over the suction box in the forming section. The intentions are twofold. Firstly, the dry content of the web should be increased by a more uniform compression, primarily in the thickness direction. Secondly, the airflow into the suction box should be reduced. The trials were performed using a specially designed membrane loop located at the end of the fourdrinier forming section of STFI-Packforsk’s pilot paper machine EuroFEX. Two different membranes were tested. The use of a membrane resulted in a significant decrease in air consumption to achieve the same dry content of the web at the end of the wire section. To increase the dry content of the web, the structure of the membrane is important.

  • 20627.
    Åslund, Peter
    et al.
    RISE, STFI-Packforsk.
    Vomhoff, Hannes
    RISE, STFI-Packforsk.
    Method for studying the deformation of a fibre web during a suction pulse2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 4, p. 398-402Article in journal (Refereed)
    Abstract [en]

    A laboratory suction box was built to study the dynamic thickness deformation of a fibre web during a suction pulse. Both the pressure in the suction box and the duration of the suction pulse are adjustable in ranges of 0 to -40 kPa and 50 ms to 10 s, respectively. During and after the suction pulse, the web thickness and the suction pressures can be measured. Furthermore, the air flow through the web can be calculated after the experiment. The first evaluation of the performance of the laboratory suction box shows that the web is considerably compressedaaaa especially during the initial phase of the suction pulse. This indicates that web compression is an important dewatering mechanism. After the suction pulse, a rapid and significant web expansion was observed, implying that considerable rewetting probably occurs.

  • 20628.
    Åslund, Peter
    et al.
    RISE, STFI-Packforsk.
    Vomhoff, Hannes
    RISE, STFI-Packforsk.
    Web deformation during membrane-assisted dewatering2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 4, p. 415-419Article in journal (Refereed)
    Abstract [en]

    The potential of membrane-assisted dewatering was evaluated on a laboratory suction box. Different membranes, one impermeable and two permeable membranes were placed on top of the wet web, while a suction pulse was exerted underneath the web. The deformation of the wet web and the dry content of the web were determined approx. 30 seconds after the suction pulse. The results of these experiments were compared with results of those carried out without a membrane. A significantly higher web compression was observed at the end of the suction pulse when a membrane was used. The increased web compression that occurred when using a membrane corresponded to a dry content of 3 to 4%. The highest dry content values were obtained, however, when no membrane was applied. This contradiction was interpreted as a higher rewetting after the suction pulse when a membrane was used. Here, due to the reduced air flow through both the web and the forming fabric, it is likely that more water was available in the forming fabric for rewetting. Apparently, the air flow removed water from the forming fabric that otherwise would have been rewetted by the web.

  • 20629.
    Åslund, Peter
    et al.
    RISE, STFI-Packforsk.
    Vomhoff, Hannes
    RISE, STFI-Packforsk.
    Waljanson, Alexander
    RISE, STFI-Packforsk.
    External rewetting after suction box dewatering2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 4, p. 409-414Article in journal (Refereed)
    Abstract [en]

    A method has been developed to enable external rewetting to be measured during suction box dewatering. In a laboratory suction box, webs were instantaneously separated from the forming fabric at defined times, both during and after the suction pulse. External rewetting was measured for webs of mechanical (50, 100 g/m2) and chemical pulp (100, 200 g/m 2). Suction pulses with a pressure drop of 10 and 40 kPa, and duration of 50 to 1000 ms were used. A considerable external rewetting was observed occurring primarily directly after the end of the suction pulse. Under the process conditions investigated, rewetting accounted for a dry content decrease of between 3 and 6%.

  • 20630. Åstlund, L
    et al.
    Wang, Q
    RISE, Swedish ICT, Acreo.
    Esteve, R
    Almqvist, S
    Rihtnesberg, D
    Reshanov, S
    Zhang, A Z
    Lim, J K
    RISE, Swedish ICT, Acreo.
    Bakowski, M
    RISE, Swedish ICT, Acreo.
    Schöner, A
    Kaplan, W
    4H- 6H-SiC UV photodetectors2012In: Phys. Status Solid, Vol. c9, no 7, p. 1680-2Article in journal (Refereed)
  • 20631.
    Åström, A
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedelsforskning.
    Heat transfer between fluid and particles in food processing. Licentiate thesis.1991Report (Refereed)
  • 20632.
    Åström, A
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedelsforskning.
    Mätteknik för livsmedelskvalitet1991Report (Refereed)
  • 20633.
    Åström, A
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Svenska livmedelsinstitutet.
    Pastöristering bibehåller hög produktkvalitet hos kyllagrad korv1984Report (Refereed)
  • 20634.
    Åström, A
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Normann, A
    SIK – Institutet för livsmedel och bioteknik.
    Konsumenters livsmedelsval – hur, varför och när?2014Report (Other academic)
  • 20635.
    Åström, A
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Svenska livmedelsinstitutet.
    Sundström, B
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Svenska livmedelsinstitutet.
    Vinsmo, L G
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Uppbyggnad av en aseptikstation.1988Report (Refereed)
  • 20636.
    Åström, Annika
    SIK – Institutet för livsmedel och bioteknik.
    The influence of some key ingredients on the sensory characteristics of mayonnaise.1998In: Food and Drink Review, Spring, p. 43-48Article in journal (Refereed)
  • 20637.
    Åström, Annika
    et al.
    SIK – Institutet för livsmedelsforskning.
    Bark, G.
    Heat transfer between fluid and particles in aseptic processing1994In: Journal of Food Engineering, ISSN 0260-8774, E-ISSN 1873-5770, Vol. 21, no 1, p. 97-125Article in journal (Refereed)
    Abstract [en]

    The particle heat transfer coefficient, hfp, is one of the critical factors, besides the residence time distribution, that has to be known for the design and development of continuous heat processes of particulate food products. In the present work, data and methods for determining hhp for conditions relevant to aseptic processing have been studied. The influence of product characteristics, such as size and composition of particles, fluid properties, temperature differences and fluid motion, have been investigated. Among the parameters investigated, the flow field around the particles was shown to be the most important for heat transfer but for special conditions the particle size, particle shape or thermal properties of the particle, as well as the apparent viscosity and the thermal properties of the fluid, are equally important for the value of hfp. For safety considerations, the present investigation indicates that hfp values corresponding to an Nu value of 5-6 should be relevant for medium-sized spherical particles transported by a highly viscous liquid. For the quality aspects, different conditions have to be considered. Particles at different positions in·the tube flow will experience different heat transfer. The few particles in the centre of the tube will experience a low heat transfer and hfp values corresponding to Nu values ranging between 5 and 10. The larger amounts of particles are transported in the liquid with a pronounced velocity gradient which yields Nu values of 10-17, while for extreme conditions occurring for sedimented particles, Nu values between 20 and 45 could be expected. © 1993.

  • 20638.
    Åström, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Goldman, A.
    Heiniö, R.-L.
    Workshop summary: Cross-cultural sensory and consumer studies.2006In: Food Quality and Preferences, Vol. 17, p. 646-649Article in journal (Refereed)
  • 20639.
    Åström, Björn
    RISE, Swerea, Swerea KIMAB.
    Non destructive evaluation of adhesive bonds2014Report (Refereed)
    Abstract [en]

    Adhesive joining is a method that gains ground within primarily the automotive segment due to the introduction of light weight materials and difficult material combinations. Light weight metals like aluminium, titanium and magnesium along side of polymer matrix composites has been used within the aerospace industry for quite some time, but the production series within the automotive segment is usually significantly longer and the production time usually more limited To be able to work with quality assurance on a continuous basis demands non destructive evaluation methods that are fast, reliable and preferably possible to at least partly automate. There are several non destructive evaluations methods that might meet these demands, e.g. (computerised) visual inspection, shearography, IR thermo-graphy, acoustic emission, computer aided tap testing and a few ultrasonic techniques: Guided Wave inspection and laser ultrasonics. In many cases it is desirable to evaluate a bondline prior to adhesive setting, but due to the basic principles of the evaluations method, the adherends or a combination thereof, this is not always possible. In some cases, however it is possible with considerable potential cost saves as a result. The NDE methods probably best suited for pre setting evaluation is IR thermography and Guided Wave inspection. In some cases visual inspection, possibly computer aided, can be a feasible alternative as well.

  • 20640.
    Åström, E.
    et al.
    LKAB, Sweden.
    Björkvall, J.
    RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS.
    Björkman, B.
    Luleå University of Technology, Sweden.
    Hallberg, D.
    LKAB, Sweden.
    Vanadium oxide solubility in CaO–SiO2–VOX system2017In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 44, no 1, p. 42-51Article in journal (Refereed)
    Abstract [en]

    The solubility of vanadium oxide in the SiO2–CaO–VOX system was investigated as a function of basicity (CaO/SiO2) at a fixed temperature of 1600°C and oxygen partial pressure of 10−10 atm. Formed phases and microstructures of saturated samples were identified with SEM–EDS analysis and XRD. Maximum solubility of vanadium oxide was between 15 and 20% independent of basicity. Pure karelianite (V2O3) was formed in all samples at saturation of vanadium oxide. The morphology of karelianite changed with the change in basicity in the slag, where needles or threads were formed for slags with basicity B2 = 0.54 and B2 = 0.67 and stars or dendritic patterns were formed with basicity B2 = 1.0 and B2 = 1.22. Wollastonite (CaSiO3) was also formed in the slags with star or dendritic patterns.

  • 20641.
    Åström, Malin
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek..
    EDI i sågverksbranschen - en kartläggning av informationsflödet hos ett sågverksföretag och av mognaden hos dess potentiella EDI-partner1994Report (Other academic)
    Abstract [sv]

    EDI, eller Electronic Data Interchange, är en teknik som används för att effektivisera informationsflödet mellan företag. Tekniken innebär att företagen skickar affärsmeddelanden till varandra på elektronisk väg, via sina administrativa datorsystem. Undersökningen ska fungera som underlag för Iggesunds Timber AB när man ska besluta i vilken utsträckning man ska satsa på EDI. Rapporten är resultatet av det examensarbete, som Malin Åström genomfört för sin jägmästarexamen.

  • 20642.
    Åström, Timas
    RISE, Swerea, Swerea SICOMP.
    Outlook for technical textiles in the Nordic countries [Aussichten für technische Textilien in den nordischen Ländern]2003In: AVR Allgemeiner Vliesstoff-Report, ISSN 1704060, no 4, p. s. 10-11Article in journal (Refereed)
    Abstract [en]

    General economic information on industrial textiles in Scandinavia is presented. Areas in which Nordic companies are particularly successful include: automotive and agricultural textiles, sportswear, building textiles, medical textiles, protective garments and safety textiles. Those sectors in which Nordic countries are particularly successful are airbag fabrics, geotextiles, sun protection fabrics, papermakers' felts, camouflage screens and fabric-reinforced composites. The impact of labour costs on manufacturing is discussed. Product development is noted.

  • 20643. Öberg, Kurt
    et al.
    Jonsson, Claes
    Norén, Olle
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Farligt buller i jordbruket: enkätundersökning och pilotstudie för bullermätning2003Report (Refereed)
  • 20644. Ödberg, L
    et al.
    Forsberg, S
    McBride, G
    Persson, M
    Stenius, P
    YKI – Ytkemiska institutet.
    Ström, G
    Surfactant behaviour of wood resin components.Part 2. Solubilization in micelles of rosin and fatty acids1985In: Svensk Papperstidning, ISSN 0283-6831, Vol. 88, p. R118-R125Article in journal (Refereed)
  • 20645.
    Ödberg, L
    et al.
    YKI – Ytkemiska institutet.
    McBride, G
    YKI – Ytkemiska institutet.
    Magnusson, KE
    Characterization of the surface of cellulosic fibers using aqueous two-phase partitioning1985In: Progress in Colloid and Polymer Science, ISSN 0340-255X, E-ISSN 1437-8027, Vol. 70, p. 109-112Article in journal (Refereed)
  • 20646. Ödberg, L
    et al.
    Ström, G
    YKI – Ytkemiska institutet.
    ESCA studies of retention and dewatering aids. The adsorption of polymin SNand polymin SN-lignosulfonate complexes on cellulose1983In: Svensk Papperstidning, ISSN 0283-6831, Vol. 86, p. R141-R145Article in journal (Refereed)
  • 20647.
    Ödegard, E
    CBI - Cement- och betonginstitutet.
    Undersökning av betongens tryckhållfasthetsegenskaper vid tidig ålder1962Report (Refereed)
  • 20648.
    Ödman, Sven T A
    CBI - Cement- och betonginstitutet.
    Analysis of stresses in a cracket reinforced concrete beam1973Report (Refereed)
  • 20649.
    Ödman, Sven T. A
    RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB.
    Betongblandningens inverkan på krympningen1969In: Byggmästaren, ISSN 0562-102X, no 6, article id 57Article in journal (Other academic)
  • 20650.
    Ödman, Sven T A
    CBI - Cement- och betonginstitutet.
    Differentialekvation för beräkning av bärande konstruktioners svängningar till följd av åkande laster1948Report (Refereed)
410411412413414415416 20601 - 20650 of 20974
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