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  • 20601.
    Ödman, Sven T A
    CBI - Cement- och betonginstitutet.
    Stresses in axiallyt reinforced concrete prisms subjected to tension and exposed to drying1962Report (Refereed)
  • 20602.
    Ödman, Sven T A
    CBI - Cement- och betonginstitutet.
    Tests on shrinkage of reinforced concrete beams1973Report (Refereed)
  • 20603. Ödman, Torbjörn
    et al.
    Ankarson, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, EMC.
    Hallbjörner, Paul
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, EMC.
    Experimental Study of Path Loss for UHF Band Communication Near Water Surface2012In: International Journal on Communications Antenna and Propagation (I.Re.C.A.P.), Vol. 2, no 3, p. 215-219Article in journal (Other academic)
  • 20604.
    Ögren, Mikael
    Energiteknik (ET).
    Multi reflected rays in a refracting atmosphere: Nord 2000 progress report1999Report (Refereed)
  • 20605.
    Ögren, Mikael
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Akustik (Eta).
    Propagation of sound - screening and ground effect. Part 1. Non-refracting atmosphere.1997Report (Refereed)
  • 20606.
    Ögren, Mikael
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Akustik (Eta).
    Propagation of sound - Screening and ground effect. Part 2: Refracting atmosphere.1998Report (Refereed)
  • 20607.
    Ögren, Mikael
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Akustik (Eta).
    The design of an array microphone.1996Report (Refereed)
  • 20608.
    Ögren, Mikael
    Energiteknik (ET).
    Turbulence and finite screens. Environmental noise 2000.1998Report (Refereed)
  • 20609.
    Ögren, Mikael
    SP – Sveriges Provnings- och Forskningsinstitut.
    Turbulence and finite scrrens. Environmental noise 20001998Report (Refereed)
  • 20610.
    Ögren, Mikael
    et al.
    Energiteknik (ET).
    Persson, Per
    Nord 2000 validation measurements1999Report (Refereed)
  • 20611.
    Ögren, Yngve
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.
    Gullberg, Marcus
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
    Wennebro, Jonas
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
    Sepman, Alexey
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
    Toth, Pal
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. University of Miskolc, Hungary.
    Wiinikka, Henrik
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.
    Influence of oxidizer injection angle on the entrained flow gasification of torrefied wood powder2018In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 181, p. 8-17Article in journal (Refereed)
    Abstract [en]

    In the present work, 5 different axisymmetric burners with different directions of the oxidizer inlets were experimentally tested during oxygen blown gasification of torrefied wood powder. The burners were evaluated under two different O2/fuel ratios at a thermal power of 135 kWth, based on the heating value of torrefied wood powder. The evaluation was based on both conventional methods such as gas chromatography measurements and thermocouples and in-situ measurements using Tunable Diode Laser Absorption Spectroscopy. It was shown that changes in the near burner region influence the process efficiency significantly. Changing the injection angle of the oxidizer stream to form a converging oxidizer jet increased process efficiency by 20%. Besides increased process efficiency, it was shown that improvements in burner design also influence carbon conversion and hydrocarbon production. The burner with the best performance also produced less CH4 and achieved the highest carbon conversion. The effect of generating swirl via rotating the oxidizer jet axes was also investigated. Swirl broadened or removed the impingement area between the fuel and oxidizer jets, however resulting in differences in performance within the measurement uncertainty.

  • 20612.
    Ögren, Yngve
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology,Sweden.
    Sepman, Alexey
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
    Qu, Zhechau
    Umeå University, Sweden.
    Schmidt, Florian M.
    Umeå University, Sweden.
    Wiinikka, Henrik
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.
    Comparison of Measurement Techniques for Temperature and Soot Concentration in Premixed, Small-Scale Burner Flames2017In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 31, no 10, p. 11328-11336Article in journal (Refereed)
    Abstract [en]

    Optical and intrusive measurement techniques for temperature and soot concentration in hot reacting flows were tested on a small-scale burner in fuel-rich, oxygen-enriched atmospheric flat flames produced to simulate the environment inside an entrained flow reactor. The optical techniques comprised two-color pyrometry (2C-PYR), laser extinction (LE), and tunable diode laser absorption spectroscopy (TDLAS), and the intrusive methods included fine-wire thermocouple thermometry (TC) and electrical low pressure impactor (ELPI) particle analysis. Vertical profiles of temperature and soot concentration were recorded in flames with different equivalence and O2/N2 ratios. The 2C-PYR and LE data were derived assuming mature soot. Gas temperatures up to 2200 K and soot concentrations up to 3 ppmv were measured. Close to the burner surface, the temperatures obtained with the pyrometer were up to 300 K higher than those measured by TDLAS. Further away from the burner, the difference was within 100 K. The TC-derived temperatures were within 100 K from the TDLAS results for most of the flames. At high signal-to-noise ratio and in flame regions with mature soot, the temperatures measured by 2C-PYR and TDLAS were similar. The soot concentrations determined with 2C-PYR were close to those obtained with LE but lower than the ELPI results. It is concluded that the three optical techniques have good potential for process control applications in combustion and gasification processes. 2C-PYR offers simpler installation and 2D imaging, whereas TDLAS and LE provide better accuracy and dynamic range without calibration procedures.

  • 20613.
    Ögren, Yngve
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.
    Toth, Pal
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. University of Miskolc, Hungary.
    Garami, Attila
    University of Miskolc, Hungary.
    Sepman, Alexey
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
    Wiinikka, Henrik
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.
    Development of a vision-based soft sensor for estimating equivalence ratio and major species concentration in entrained flow biomass gasification reactors2018In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 226, p. 450-460Article in journal (Refereed)
    Abstract [en]

    A combination of image processing techniques and regression models was evaluated for predicting equivalence ratio and major species concentration (H2, CO, CO2 and CH4) based on real-time image data from the luminous reaction zone in conditions and reactors relevant to biomass gasification. Two simple image pre-processing routines were tested: reduction to statistical moments and pixel binning (subsampling). Image features obtained by using these two pre-processing methods were then used as inputs for two regression algorithms: Gaussian Process Regression and Artificial Neural Networks. The methods were evaluated by using a laboratory-scale flat-flame burner and a pilot-scale entrained flow biomass gasifier. For the flat-flame burner, the root mean square error (RMSE) were on the order of the uncertainty of the experimental measurements. For the gasifier, the RMSE was approximately three times higher than the experimental uncertainty – however, the main source of the error was the quantization of the training dataset. The accuracy of the predictions was found to be sufficient for process monitoring purposes. As a feature extraction step, reduction to statistical moments proved to be superior compared to pixel binning.

  • 20614.
    Öhgren, C
    SIK – Institutet för livsmedel och bioteknik.
    Smakliga rätter för ökad konsumtion av nyttiga vegetabilier : slutrapport2010Report (Other academic)
  • 20615.
    Öhgren, C
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Lorén, N
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Altskär, Annika
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Hermansson, A.-M.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Surface-directed structure formation of β-lactoglobulin inside droplets2011In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 12, no 6, p. 2235-2242Article in journal (Refereed)
    Abstract [en]

    The morphology of β-lactoglobulin structures inside droplets was studied during aggregation and gelation using confocal laser scanning microscopy (CLSM) equipped with a temperature stage and transmission electron microscopy (TEM). The results showed that there is a strong driving force for the protein to move to the interface between oil and water in the droplet, and the β-lactoglobulin formed a dense shell around the droplet built up from the inside of the droplets. Less protein was found inside the droplets. The longer the β-lactoglobulin was allowed to aggregate prior to gel formation, the larger the part of the protein went to the interface, resulting in a thicker shell and very little material being left inside the droplets. The droplets were easily deformed because no network stabilizes them. When 0.5% emulsifier, polyglycerol polyresinoleat (PGPR), was added to the oil phase, the β-lactoglobulin was situated both inside the droplets and at the interface between the droplets and the oil phase; when 2% PGPR was added, the β-lactoglobulin structure was concentrated to the inside of the droplets. The possibility to use the different morphological structures of β-lactoglobulin in droplets to control the diffusion rate through a β-lactoglobulin network was evaluated by fluorescence recovery after photobleaching (FRAP). The results show differences in the diffusion rate due to heterogeneities in the structure: the diffusion of a large water-soluble molecule, FITC-dextran, in a dense particulate gel was 1/4 of the diffusion rate in a more open particulate β-lactoglobulin gel in which the diffusion rate was similar to that in pure water.

  • 20616.
    Öhgren, Camilla
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience, Structure Design.
    Fabregat, Nieves
    RISE, SP – Sveriges Tekniska Forskningsinstitut. SLU Swedish University of Agricultural Sciences, Sweden.
    Langton, Maud
    SLU Swedish University of Agricultural Sciences, Sweden.
    Quality of bread baked from frozen dough - effects of rye, and sugar content, kneading time and proofing profile2016In: Lebensmittel-Wissenschaft + Technologie, ISSN 0023-6438, E-ISSN 1096-1127, Vol. 68, p. 626-633Article in journal (Refereed)
    Abstract [en]

    The objectives of this study were to evaluate whether proofing profile influences volume and crumb firmness in bread baked from frozen dough, and whether rye or sugar content and different kneading times affect the microstructure of the frozen dough. Microscopy was used to explain the differences.Wheat doughs mixed with rye ("rye") and with sugar ("sweet") were frozen after 3 different proofing times (0, 18, and 38 min) and visualized with confocal laser scanning microscopy and 3-dimensional micro-computed tomography. The baked breads were evaluated for volume and texture. Breads from un-proofed frozen dough allowed to proof after thawing showed the highest volume (4.0 cm3/g) and the softest crumb texture. The pre-proofed sweet bread had firmer crumbs and lower volume (2.5-3.0 cm3/g) than the pre-proofed rye bread (2.7-3.7 cm3/g). Reasons for the differences in quality parameters between the rye and sweet breads were investigated by studying the different influences of kneading time and sugar content on fresh and frozen dough. The gluten network was found to be more homogeneously distributed in doughs with longer kneading times and lower sugar content, and less well distributed and more lumped in frozen than in fresh dough.

  • 20617.
    Öhgren, Camilla
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Langton, Maud
    SIK – Institutet för livsmedel och bioteknik.
    Hermansson, Ann-Marie
    SIK – Institutet för livsmedel och bioteknik.
    Structure-fracture measurements of particulate gels2004In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 39, no 21, p. 6473-6482Article in journal (Refereed)
    Abstract [en]

    Images on a micron scale and the stress-strain behaviour of gel structures during tension were simultaneously recorded in real time using a mini fracture cell under the confocal laser scanning microscope (CLSM). ?-lactoglobulin gels tailor-made to vary in density, connectivity, thickness of strands and size of aggregates and clusters were used as a food model system. Amylopectin and gelatin were used to generate different types of ?-lactoglobulin network microstructures and also as a second continuous phase. Both rheological and structural differences in fragility between ?-lactoglobulin gels were verified according to the density of their aggregated network structure. A dense gel has a more brittle behaviour where the clusters are rigid and the crack propagates smoothly compared to a gel with an open network structure, which has a discontinuous crack growth, via a winding pathway around clusters, and also break-up of the pores far from the crack tip. Differences in the stretchability of the aggregated ?-lactoglobulin structure, induced by addition of amylopectin solution, were proved and related to differences in stress-strain behaviour and crack propagation. Gelatin gels in the pores between the ?-lactoglobulin clusters do not affect the structure of the ?-lactoglobulin network but make the fracture fragile giving a smooth fracture surface, cause continuous crack growth and fracture propagation through ?-lactoglobulin clusters. This is a consequence of that the mixed gel follows the behaviour of the gelatin gel when the gelatin phase is stronger than the ?-lactoglobulin network. © 2004 Kluwer Academic Publishers.

  • 20618.
    Öhgren, Camilla
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Loren, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Altskär, Annika
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Hermansson, Ann-Marie
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik.
    Surface-directed structure formation of beta-lactoglobulin inside droplets2011In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 12, no 6, p. 2235-2242Article in journal (Refereed)
    Abstract [en]

    The morphology of ?-lactoglobulin structures inside droplets was studied during aggregation and gelation using confocal laser scanning microscopy (CLSM) equipped with a temperature stage and transmission electron microscopy (TEM). The results showed that there is a strong driving force for the protein to move to the interface between oil and water in the droplet, and the ?-lactoglobulin formed a dense shell around the droplet built up from the inside of the droplets. Less protein was found inside the droplets. The longer the ?-lactoglobulin was allowed to aggregate prior to gel formation, the larger the part of the protein went to the interface, resulting in a thicker shell and very little material being left inside the droplets. The droplets were easily deformed because no network stabilizes them. When 0.5% emulsifier, polyglycerol polyresinoleat (PGPR), was added to the oil phase, the ?-lactoglobulin was situated both inside the droplets and at the interface between the droplets and the oil phase; when 2% PGPR was added, the ?-lactoglobulin structure was concentrated to the inside of the droplets. The possibility to use the different morphological structures of ?-lactoglobulin in droplets to control the diffusion rate through a ?-lactoglobulin network was evaluated by fluorescence recovery after photobleaching (FRAP). The results show differences in the diffusion rate due to heterogeneities in the structure: the diffusion of a large water-soluble molecule, FITC-dextran, in a dense particulate gel was 1/4 of the diffusion rate in a more open particulate ?-lactoglobulin gel in which the diffusion rate was similar to that in pure water. © 2011 American Chemical Society.

  • 20619.
    Öhlén, Peter
    et al.
    Ericsson Research, Sweden.
    Skubic, Björn
    Ericsson Research, Sweden.
    Rostami, Ahmad
    Ericsson Research, Sweden.
    Fiorani, Matteo
    RISE, Swedish ICT, Acreo, Broadband Technology. KTH Royal Institute of Technology, Sweden.
    Monti, Paolo
    RISE, Swedish ICT, Acreo, Broadband Technology. KTH Royal Institute of Technology, Sweden.
    Ghebretensaé, Zere
    Ericsson Research, Sweden.
    Mårtensson, Jonas
    RISE, Swedish ICT, Acreo.
    Wang, Kun
    RISE, Swedish ICT, Acreo.
    Wosinska, Lena
    RISE, Swedish ICT, Acreo, Broadband Technology. KTH Royal Institute of Technology, Sweden.
    Data Plane and Control Architectures for 5G Transport Networks2016In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 34, no 6, p. 1501-1508Article in journal (Refereed)
    Abstract [en]

    Next generation 5G mobile system will support the vision of connecting all devices that benefit from a connection, and support a wide range of services. Consequently, 5G transport networks need to provide the required capacity, latency, and flexibility in order to integrate the different technology domains of radio, transport, and cloud. This paper outlines the main challenges, which the 5G transport networks are facing and discusses in more detail data plane, control architectures, and the tradeoff between different network abstraction models.

  • 20620.
    Öhman, Christina
    et al.
    STATIC!.
    Backlund, Sara
    STATIC!.
    Redström, Johan
    RISE, Swedish ICT, Interactive Institute. Design Research Unit.
    Mazé, Ramia
    RISE, Swedish ICT, Interactive Institute. Design Research Unit.
    Ilstedt Hjelm, Sara
    STATIC!.
    Routarinne, Sara
    STATIC!.
    Static! Designing for Energy Awareness2010 (ed. 20)Book (Other academic)
    Abstract [en]

    From the boost of the first cup of coffee in the morning to the glow of a nightlight that keeps a child company after dark, much of our contemporary lifestyles is powered by electricity. Today, however, the economic and environmental costs of energy require us to think again. While recognizing the complex social functions and cultural forms of electricity in everyday life, the current challenge for design is to change practices and patterns of (over)consumption. Static! explores design as a basis for increasing awareness of energy. Familiar furnishings and products have been reinterpreted to materialize electricity, to make it more visible and tangible for people. The resulting series of conceptual design examples express the poetics – and politics – of everyday electricity consumption. A design research project at the Interactive Institute funded by the Swedish Energy Agency, Static! has proved to be a pioneer in opening a current and critical research area at the intersection of design, energy and information technology. This book presents the Static! design examples and perspectives on issues in (sustainable) design today. Grounded in passion and humor, as well as rigor and research, the book asks designers and consumers – that is, all of us – to rethink the form, and future, of electricity in the world around us.

  • 20621. Öhman, M
    et al.
    Nyström, J
    Oja, Johan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP - Sveriges Tekniska Forskningsinstitut, SP Trä.
    Prediction of compression wood in sawn products of Picea abies by 3-D sequential outer shape medelling of the log2005In: 5th workshop "Connection between forest resources and wood quality". Waiheke Island, Auckland, New Zealand. 2005-11-30, 2005Conference paper (Other academic)
  • 20622.
    Öhman, Maria
    RISE, Swerea, Swerea KIMAB.
    The evaluation of pre-loaded structural components - A literature survey with focus on rock bolt axial load evaluation employing the ultrasonic bi-wave technique in a non-contact mode2014Report (Refereed)
    Abstract [sv]

    As rock bolts are grouted into e.g. cement or epoxy, only one end is accessible for the analytical technique in question, ultrasonic methods are being considered valuable nondestructive techniques for estimating the bolt integrity. The conventional acoustoelastic ultrasonic technique for deducing the axial loading of prestressed bolts is based on variations in the time-of-flight of a single longitudinal bulk wave with loading. A main drawback of this mono-wave technique is the required pre-knowledge of the initial bolt length and the initial loading condition. The bi-wave method on the other hand allows the axial load in the stressed state to be calculated from the time-of-flight ratio of two different wave types, without preknowledge of measurement in the unstressed state. Commercial piezoelectric probes exist that simultaneously generate and detect both longitudinal and transverse bulk waves, and the bi-wave technique has successfully been used for deducing the axial load of 50-215 mm long bolts. Piezoelectric transducers, however, require an intimate contact with the bolt end why errors rise from various surface conditions and couplant properties. The primary advantage of EMAT transducers over piezoelectric transducers is the ultrasonic wave generation and detection through electromagnetic forces, without requirements for intimate contact with the bolt end. The main drawback of the EMAT systems is; however, the generally low signal-to-noise ratio compared to piezoelectric transducers. Currently no commercial EMAT probe exists for bi-wave applications; however, an EMAT bi-wave prototype equipment has proven capable to measure the axial load condition of bolts with lengths up to 500 mm.

  • 20623.
    Öhman, Maria
    et al.
    RISE, Swerea, Swerea KIMAB.
    Persson, Dan
    RISE, Swerea, Swerea KIMAB.
    ATR-FTIR Kretschmann spectroscopy for interfacial studies of a hidden aluminum surface coated with a silane film and epoxy I.: Characterization by IRRAS and ATR-FTIR2012In: Surface and Interface Analysis, ISSN 0142-2421, E-ISSN 1096-9918, Vol. 44, no 2, p. 133-143Article in journal (Refereed)
    Abstract [en]

    Interfacial analysis is essential in many areas of interest, for instance within the ongoing research on environmentally friendly pretreatments of metal surfaces. While studies of the hidden interface between a metal and polymer top-coat are of great importance, properties of a surface confined between two media are difficult to analyze in detail. Within the two parts of this study, ATR-FTIR spectroscopy in the Kretschmann geometry is employed as the main analytical tool to study the interface between a thermo-cured epoxy and aluminum pretreated with a silane film. The technique requires model systems based on thin metal films, but in contrast to most analytical techniques it permits the analysis of a hidden interface. Initial characterization of the silane film formed from a pH-regulated γ-APS and BTSE solution was conducted by both ATR-FTIR Kretschmann and IRRAS spectroscopy. Absorption bands were obtained at 1250-900 cm -1, assigned to Si-O functionalities, and at ∼1570 and ∼1410 cm -1 assigned to acetate existing as a counter-ion to γ-APS. After application of the epoxy film, interfacial alterations were detected upon thermal curing including the densification of the epoxy film, the dehydration of aluminum and the formation of molecular epoxy reaction products. Few alterations could be assigned to the silane film. Calculated spectra derived from optical data can verify experimental results and aid data interpretation, and effects of metal oxidation of aluminum were confirmed by introducing gold as an additional substrate. The results showed that ATR-FTIR Kretschmann spectroscopy is clearly a valuable tool for the study of hidden interfaces of stratified media. Copyright © 2011 John Wiley & Sons, Ltd.

  • 20624.
    Öhman, Maria
    et al.
    RISE, Swerea, Swerea KIMAB.
    Persson, Dan
    RISE, Swerea, Swerea KIMAB.
    ATR-FTIR Kretschmann spectroscopy for interfacial studies of a hidden aluminum surface coated with a silane film and epoxy II.: Analysis by integrated ATR-FTIR and EIS during exposure to electrolyte with complementary studies by in situ ATR-FTIR and in situ IRRAS2012In: Surface and Interface Analysis, ISSN 0142-2421, E-ISSN 1096-9918, Vol. 44, no 1, p. 105-113Article in journal (Refereed)
    Abstract [en]

    The destabilization of the interface between a polymer and a metal surface is of considerable interest in several application areas, including the ongoing research on environmentally friendly pretreatments as a replacement for the Cr(VI)-containing systems where the understanding of mechanisms and performance of a confined metal/polymer interface is of utmost importance. Processes at hidden interfaces are, however, difficult to analyze in detail and at relevant climatic conditions. This study has been divided in two parts, where the subject of Part I is the surface characterization by ATR-FTIR Kretschmann and IRRAS spectroscopy of aluminum coated with an amino-functional silane, and the interfacial analysis by ATR-FTIR Kretschmann after further application of an epoxy film. This second part describes the interaction between the coated sample and an electrolyte. The analysis is performed by integrated in situ ATR-FTIR Kretschmann and EIS, which requires model systems with evaporated metal films on an internal reflection element. Complementary analyses were also conducted on substrates in the absence of the metal film, and or in the absence of an epoxy top-coat, respectively. Changes in the interfacial region were observed and assigned to the water uptake including swelling of the epoxy, and the formation of aluminium oxidation and hydration products. Complementary studies allowed the distinction between water uptake in the silane film and the epoxy, respectively, as well as reformations of the siloxane network. © 2011 John Wiley & Sons, Ltd.

  • 20625.
    Öhman, Maria
    et al.
    RISE, Swerea, Swerea KIMAB.
    Persson, Dan
    RISE, Swerea, Swerea KIMAB.
    Jacobsson, Dan
    RISE, Swerea, Swerea KIMAB.
    In situ studies of conversion coated zinc/polymer surfaces during exposure to corrosive conditions2011In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 70, no 1, p. 16-22Article in journal (Refereed)
    Abstract [en]

    This work investigates the hidden interface between a conversion-coated zinc surface and a polymer coating upon exposure to an electrolyte by simultaneous in situ ATR-FTIR and EIS. Various system properties were distinguished, such as the ingress of electrolyte constituents, and an active process of water-induced alterations of the conversion layer. The interface between a polymer film and a surface treated metal surface is of considerable fundamental and technical interest in many areas of application, and the results obtained open up the use of this method for a wide range of important applications. © 2010 Elsevier B.V. All rights reserved.

  • 20626.
    Öhrman, Olov G. W.
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Molinder, Roger
    Weiland, Fredrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Johansson, Ann-Christine
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Analysis of trace compounds generated by pressurized oxygen blown entrained flow biomass gasification2014In: Environmental Progress and Sustainable Energy, 2014, Vol. 33, p. 699-705, article id 3Conference paper (Refereed)
    Abstract [en]

    Trace compounds were measured in synthesis gas and waste water from a pilot scale pressurized entrained flow oxygen blown biomass gasifier. The feedstock used was milled soft stem wood powder. Gaseous trace compounds were analyzed by gas chromatography. Up to 20 ppm of hydrogen sulfide was observed in the cold synthesis gas and the concentration seemed to be independent of the oxygen equivalence ratio (ER). Benzene varied from 30 to 1100 ppm, strongly depended on the ER and correlated well with the methane concentration. The concentrations of acetylene and ethylene increased as the ER was reduced and could have acted as precursors for the observed soot particles which were characterized using thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy. Common polycyclic aromatic hydrocarbons from high temperature biomass gasification such as pyrene, phenanthrene, fluoranthene, and naphthalene were observed in low concentrations in the soot, in the cold synthesis gas and also in the waste water from the quench. Inorganic elements from the feedstock were observed in the waste water. Comparisons were also made with previous results from a black liquor gasifier.

  • 20627.
    Öhrman, Olov G. W.
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Pettersson, Esbjörn
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Gebart, Gebart
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Benzene removal from black liquor derived synthesis gas.2011In: The International Conference on Thermochemical Conversion Science(tcbiomass), 2011Conference paper (Refereed)
  • 20628.
    Öhrman, Olov G. W.
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Pettersson, Esbjörn
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Gullberg, M.
    Westbom, U.
    Quality control of BioDME produced via black liquor gasification.2011In: 7th Asian DME Conference, 2011Conference paper (Refereed)
  • 20629.
    Öhrman, Olov .G.W
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Häggström, C.
    Wiinikka, Henrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Hedlund, J.
    Gebart, Rikard
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Analysis of trace components in synthesis gas generated by black liquor gasification2012In: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 102, p. 173-179Article in journal (Refereed)
    Abstract [en]

    The only pressurized black liquor gasifier currently in operation is located in Sweden. The composition of the main components in the gas has been reported previously. The main components are H 2, CO, CO 2, N 2, CH 4, and H 2S. In the present work, trace components in the gas have been characterized and the results are hereby reported for the first time. Samples were taken at two occasions during a one year period. The benzene concentration in the gas varied only slightly and the average concentration was 158 ppm. Benzene is formed by thermal cracking of the biomass. The COS concentration varied substantially and the average concentration was 47 ppm. The variations may be related to how the quench is operated. A few ppm of C 2-hydrocarbons were also observed in the gas and the variation was probably a result of varying oxygen to black liquor ratio. No tars were observed in the gas. However, tar compounds, such as phenanthrene, pyrene, fluoranthene and fluorene were detected in deposits found on the pipe walls after the gas cooler. The concentration of particles in the synthesis gas was very low; <0.1 mg/N m 3, which is comparable to the particulate matter in ambient air. Submicron particles were comprised of elements such as C, O, Na, Si, S, Cl, K, and Ca, and these particles probably originated from the black liquor. Larger particles were comprised mainly of Fe, S and Ni and these particles probably resulted from corrosion of steel in the plant pipe-work. In summary, the concentrations of trace components and particles in the gas are quite low. © 2012 Elsevier Ltd. All rights reserved.

  • 20630.
    Öhrman, Olov G.W.
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Johansson, A.-C.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Lindblom, M.
    H2S removal with short time contactors in a pressurized black liquor gasification plant2010In: International Chemical Recovery Conference, 2010, Vol. 2, p. 172-178Conference paper (Refereed)
  • 20631.
    Öhrman, Olov .G.W
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Pettersson, Esbjörn
    Dewatering of Biomass Using Liquid Bio Dimethyl Ether2013In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 31, no 11, p. 1267-1273Article in journal (Refereed)
    Abstract [en]

    An interesting integrated configuration in a thermochemical conversion biorefinery that is producing dimethyl ether (DME) is to use a small fraction of the BioDME for dewatering of the solid biomass feedstock. Therefore, the use of liquid BioDME was investigated in this study for pressurized dewatering of biomass at room temperature. Water was removed in liquid form from wet sawdust and wet wood chips using liquid DME in a laboratory-scale batch unit. Both the sawdust and the wood chips could be dewatered in a short time (minutes) to a moisture content of 15% (w/w) from an initial content of approximately 55% (w/w). Longer DME treatment times (hours) lowered the moisture content even further down to 8% (w/w), indicating that the transport phenomena in the porous biomass and the solubility of DME in water influence the dewatering characteristics. The DME dewatering performance, 12-22 g DME per g water removed, was similar to literature data on coal dewatering using liquid DME. The present study showed that DME dewatering of the solid biomass feedstock has potential as an energy-efficient dewatering process, especially in an integrated thermochemical conversion biorefinery. © 2013 Copyright Taylor and Francis Group, LLC.

  • 20632.
    Öhrman, Olov G.W.
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Weiland, Fredrik
    Johansson, A.J.
    Pettersson, Esbjörn
    RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
    Hedman, Henry
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Leijenhorst, E. J.
    Assink, A.
    van de Beld, L.
    Pressurized oxygen blown entrained flow gasification of pyrolysis oil.2013In: Proceedings 21st European Biomass Conference and Exhibition, 2013, p. 441-445Conference paper (Refereed)
  • 20633.
    Öhrman, Olov .G.W
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Weiland, Fredrik
    Pettersson, E.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Johansson, Ann-Christine
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Hedman, Henry
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energy Technology Center.
    Pedersen, M.
    Pressurized oxygen blown entrained flow gasification of a biorefinery lignin residue2013In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 115, p. 130-138Article in journal (Refereed)
    Abstract [en]

    Renewable fuels could in the future be produced in a biorefinery which involves highly integrated technologies. It has been reported that thermochemical conversion (gasification) of lignocellulosic biomass has a high potential for end production of renewable biofuels. In this work, lignin residue from biochemical conversion of wheat straw was gasified in an oxygen blown pressurized entrained flow gasifier (PEBG) at 0.25-0.30 MWth, 0.45 < λ < 0.5 and 1 bar (g). A video camera mounted inside the PEBG was used to observe the flame during start up and during operation. Hydrogen (H 2), carbon monoxide (CO) and carbon dioxide (CO2) were the main gas components with H2/CO ratios varying during the gasification test (0.54-0.63). The methane (CH4) concentration also varied slightly and was generally below 1.7% (dry and N2 free). C2-hydrocarbons (< 1810 ppm) and benzene (< 680 ppm) were also observed together with low concentrations of hydrogen sulfide (H2S, < 352 ppm) and carbonyl sulfide (COS, < 131 ppm). The process temperature in the reactor was around 1200 C. The slag seemed to consist of Cristobalite (SiO2) and Berlinite (AlPO4) and Na, Ca, Mg, K and Fe in lower concentrations. Cooling of the burner will be necessary for longer tests to avoid safety shut downs due to high burner temperature. The cold gas efficiency and carbon conversion was estimated but more accurate measurements, especially the syngas flow, needs to be determined during a longer test in order to obtain data on the efficiency at optimized operating conditions. The syngas has potential for further upgrading into biofuels, but will need traditional gas cleaning such as acid gas removal and water gas shifting. Also, higher pressures and reducing the amount of N2 is important in further work. © 2013 Elsevier B.V.

  • 20634.
    Ökvist, Lena Sundqvist .
    et al.
    RISE, Swerea, Swerea MEFOS.
    Brandell, C.
    Luossavaara-Kiirunavaara AB (LKAB).
    Lundgren, Maria
    RISE, Swerea, Swerea MEFOS.
    Impact of activated nut coke on energy efficiency in the blast furnace2014In: AISTech - Iron and Steel Technology Conference Proceedings, Association for Iron and Steel Technology, AISTECH , 2014, Vol. 1, p. 663-672Conference paper (Refereed)
    Abstract [en]

    [No abstract available]

  • 20635.
    Ökvist, Lena Sundqvist .
    et al.
    RISE, Swerea, Swerea MEFOS.
    Hyllander, G.
    Luossavaara-Kiirunavaara AB (LKAB).
    Olsson, E.T.
    SSAB EMEA AB.
    Wikström, Jan-Olov
    RISE, Swerea, Swerea MEFOS.
    Lundgren, Maria
    RISE, Swerea, Swerea MEFOS.
    Injection of pulverized materials into the blast furnace raceway2012In: 6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore, 2012, Vol. 3, p. 1721-1731Conference paper (Refereed)
    Abstract [en]

    A number of injection trials carried out over the years at the LKAB experimental blast furnace (LKAB EBF®) and in industrial BFs shows that tuyere injection is a feasible method for supply of various types of pulverized materials as different types of PC, BOF slag and BF dust to the BF. In this study, the effect on process, raceway conditions, hot metal quality, reductant agent consumption and slag formation due to the selection of injection materials are discussed based on trial data. A special attention is paid on the injection of alternative carbon containing residual material. Based on recent trials the efficiency in use of carbon in injected residual materials are discussed and pilot scale results compared with industrial trial results.

  • 20636.
    Ökvist, Lena Sundqvist.
    et al.
    RISE, Swerea, Swerea MEFOS.
    E., Nicklas
    LKAB.
    Wikström, Jan-Olov
    RISE, Swerea, Swerea MEFOS.
    Characterization of the state of LKAB experimental BF hearth2010In: AISTech - Iron and Steel Technology Conference Proceedings, 2010, p. 701-710Conference paper (Refereed)
    Abstract [en]

    [No abstract available]

  • 20637.
    Ökvist, Lena Sundqvist
    et al.
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS. Luleå University of Technology, Sweden.
    Lagerwall, Per
    SSAB Europe, Sweden.
    Sundelin, Bo
    SSAB Europe, Sweden.
    Orre, Joel
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS. SSAB Special Steels, Sweden.
    Brämming, Mats
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS.
    Lundgren, Maria
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS.
    Low-CO2 iornmaking in the blast furnace2017In: AISTech - Iron and Steel Technology Conference Proceedings, 2017, p. 455-463Conference paper (Refereed)
  • 20638.
    Ökvist, Lena Sundqvist.
    et al.
    RISE, Swerea, Swerea MEFOS.
    Lundgren, Maria
    RISE, Swerea, Swerea MEFOS.
    Hyllander, G.
    Luossavaara-Kiirunavaara AB (LKAB).
    Hensmann, M.
    VDEh-Betriebsforschungsinstitut GmbH (BFI).
    Olsson, E.
    SSAB EMEA AB.
    Antila, O.
    SSAB EMEA AB.
    Schuster, S.
    Voestalpine Stahl GmbH Linz.
    Injection of alternative carbon containing materials into the blast furnace2012In: TMS Annual Meeting, 2012, p. 161-169Conference paper (Refereed)
    Abstract [en]

    Residual materials from the integrated steel plant itself or other sources often contain valuable compounds of e.g. C and Fe. Dust and sludge have to be agglomerated to be able to recycle to the blast furnace (BF) via top-charging. By injection of the materials, preparation methods in terms of e.g. drying and/or screening only, can be used. Alternative carbon materials (ACM) in terms of BF dust and sludge have been successfully injected up to levels of 60 kg/tHM in the LKAB Experimental Blast Furnace (LKAB EBF®). Efficiency in recovery of valuable compounds as well as the behavior of undesired elements have been evaluated and are discussed.

  • 20639.
    Önal, Başar
    RISE, Swedish ICT, Interactive Institute.
    Designing for/from the Future2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This thesis aims to introduce new methods within the field of experience design, an emergent interdisciplinary design discipline, using these methods as tools for debate and for the communication of new design concepts. An important part of the methods come from trendspotting practice and future studies methodology. The backbone of the final project is a “meta-method” which incorporates common methods surveyed so far: the “for/from” method. The first part of the “for/from” method is about designing prototypes and creating fictional narratives to project current trends into the future, the second part is perhaps less structured, but more ambitious, carrying fictional futures to the daily lives, to test and evaluate the scenarios created. Staging experiments and experiences around these proposed methodologies and testing the concepts through workshops forms the core of the proposed design practice. Since the domain of futures thinking is not populated by designers, it is of special importance to me as how designers might find a place in such interdisciplinary teams and how the organizational levels of these so-called complex experiential structures could allow designers to participate. I argue that experience designers not only design customer experiences to please and aestheticize products but they have the power to change people’s (rather than customers’) opinions, using the same tools the field of marketing and exhibition design offers them.

  • 20640.
    Örbom, Björn
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP - Statens Provningsanstalt.
    Högvärdigt stål som armering i betongbalkar: Förankring, skarvning, sprickbildning1948Report (Other academic)
  • 20641.
    Örnek, Cem
    et al.
    RISE - Research Institutes of Sweden, Materials and Production, KIMAB. KTH Royal Institute of Technology, Sweden.
    Liu, M.
    KTH Royal Institute of Technology, Sweden ; University of Science and Technology of Beijing, China.
    Pan, J.
    KTH Royal Institute of Technology, Sweden.
    Jin, Y.
    University of Science and Technology of Beijing, China.
    Leygraf, C.
    KTH Royal Institute of Technology, Sweden.
    Volta Potential Evolution of Intermetallics in Aluminum Alloy Microstructure Under Thin Aqueous Adlayers: A combined DFT and Experimental Study2018In: Topics in catalysis, ISSN 1022-5528, E-ISSN 1572-9028, Vol. 61, no 9-11, p. 1169-1182Article in journal (Refereed)
    Abstract [en]

    In this work, first-principle density functional theory (DFT) was used to calculate the work function and Volta potential differences between aluminum alloy matrix and two intermetallic phases (Mg2Si and Al2Cu) with varying surface terminations as a function of adhering monolayers (ML) of water. The calculated data were compared with experimental local Volta potential data obtained by the scanning Kelvin probe force microscopy (SKPFM) on a commercial aluminum alloy AA6063-T5 in atmospheric environments with varying relative humidity (RH). The calculations suggest that the surface termination has a major effect on the magnitude and polarity of the Volta potential of both intermetallic phases (IMP’s). The Volta potential difference between the IMP’s and the aluminum matrix decreases when the surface is gradually covered by water molecules, and may further change as a function of adhering ML’s of water. This can lead to nobility inversions of the IMP’s relative to the aluminum matrix. The measured Volta potential difference between both IMP’s and their neighboring matrix is dependent on RH. Natural oxidation in ambient indoor air for 2 months led to a nobility inversion of the IMP’s with respect to the aluminum matrix, with the intermetallics showing anodic nature already in dry condition. The anodic nature of Al2Cu remained with the introduction of RH, whereas Mg2Si became cathodic at high RH, presumably due to de-alloying of Mg and oxide dissolution. The DFT calculations predicted an anodic character of both IMP’s in reference to the oxidized aluminum matrix, being in good agreement with the SKPFM data. The DFT and SKPFM data were discussed in light of understanding localized corrosion of aluminum alloys under conditions akin to atmospheric exposure. 

  • 20642.
    Örnek, Cem
    et al.
    KTH Royal Institute of Technology, Sweden.
    Långberg, Marie
    RISE - Research Institutes of Sweden, Materials and Production, KIMAB. KTH Royal Institute of Technology, Sweden.
    Evertsson, Jonas
    Lund University, Sweden.
    Harlow, Gary
    Lund University, Sweden.
    Linpé, Weronica
    Lund University, Sweden.
    Rullik, Lisa
    Lund University, Sweden.
    Carlà, Francesco
    European Synchrotron Radiation Facility, France.
    Felici, Roberto
    SPINCNR, Italy.
    Bettini, Eleonora
    Sandvik Materials Technology, Sweden.
    Kivisäkk, Ulf
    Sandvik Materials Technology, Sweden.
    Lundgren, Edwin
    Lund University, Sweden.
    Pan, Jinshan
    KTH Royal Institute of Technology, Sweden.
    In-situ synchrotron GIXRD study of passive film evolution on duplex stainless steel in corrosive environment2018In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 141, p. 18-21Article in journal (Refereed)
    Abstract [en]

    This paper presents new findings about the passive film formed on super duplex stainless steel in ambient air and corrosive environments, studied by synchrotron grazing-incidence X-ray diffraction (GIXRD). The passive film, formed in air, was seen to be a nano-crystalline mixed-oxide. Electrochemical polarisation to the passive region in aqueous 1 M NaCl at room temperature resulted in an increase of the passive film thickness, preferential dissolution of Fe, and partial loss of crystallinity. After termination of polarization to the transpassive regime, reformation of the mixed-oxides was observed, showing a thicker, semi-crystalline, and more defective nature (more vacancies) with further new oxides/hydroxides.

  • 20643.
    Örnek, Cem
    et al.
    RISE - Research Institutes of Sweden, Materials and Production, KIMAB. KTH Royal Institute of Technology, Sweden.
    Reccagni, Pierfranco
    University of Manchester, UK.
    Kivisäkk, Ulf
    AB Sandvik Materials Technology, Sweden.
    Bettini, Eleonora
    AB Sandvik Materials Technology, Sweden.
    Engelberg, Dirk L.
    University of Manchester, UK.
    Pan, Jinshan
    KTH Royal Institute of Technology, Sweden.
    Hydrogen embrittlement of super duplex stainless steel – Towards understanding the effects of microstructure and strain2018In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 43, no 27, p. 12543-12555Article in journal (Refereed)
    Abstract [en]

    The effects of austenite spacing, hydrogen charging, and applied tensile strain on the local Volta potential evolution and micro-deformation behaviour of grade 2507 (UNS S32750) super duplex stainless steel were studied. A novel in-situ methodological approach using Digital Image Correlation (DIC) and Scanning Kelvin Probe Force Microscopy (SKPFM) was employed. The microstructure with small austenite spacing showed load partitioning of tensile micro-strains to the austenite during elastic loading, with the ferrite then taking up most tensile strain at large plastic deformation. The opposite trend was seen when the microstructure was pre-charged with hydrogen, with more intense strain localisation formed due to local hydrogen hardening. The hydrogen-charged microstructure with large austenite spacing showed a contrasting micro-mechanical response, resulting in heterogeneous strain localisation with high strain intensities in both phases in the elastic regime. The austenite was hydrogen-hardened, whereas the ferrite became more strain-hardened. SKPFM measured Volta potentials revealed the development of local cathodic sites in the ferrite associated with hydrogen damage (blister), with anodic sites related to trapped hydrogen and/or micro voids in the microstructure with small austenite spacing. Discrete cathodic sites with large Volta potential variations across the ferrite were seen in the coarse-grained microstructure, indicating enhanced susceptibility to micro-galvanic activity. Microstructures with large austenite spacing were more susceptible to hydrogen embrittlement, related to the development of tensile strains in the ferrite.

  • 20644. Örnemark, U
    et al.
    Lundgren, B
    Langer, S
    Metrologi: ett nygammalt verktyg i kemistens kvalitetssäkringsarbete1998In: Ytforum / Sveriges galvanotekniska förening, ISSN 0349-4470, Vol. 31, no 4Article in journal (Other academic)
  • 20645.
    Örnemark, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Bridging cultural gaps in quality assurance2001In: Accreditation and Quality Assurance, ISSN 0949-1775, E-ISSN 1432-0517, Vol. 6, no 5, p. 138-139Article in journal (Other academic)
  • 20646.
    Örnemark, Ulf
    SP – Sveriges Provnings- och Forskningsinstitut.
    Evaluation of a model for participation in proficiency testing schemes proposed in Nordtest project 1421-981999Report (Refereed)
  • 20647.
    Örnemark, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Have uncertainty statements improved over the last ten years? Experience from the IRMM-international measurement evaluation programme (IMEP)1999Conference paper (Other academic)
  • 20648.
    Örnemark, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    IMEP 7 - Trace elements in human serum1999In: CITAC newsletter, no Febr, p. 9-10Article in journal (Other academic)
  • 20649.
    Örnemark, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Interlaboratory comparisons in support of international comparability and traceability for clinical chemical measurements1999In: EQA news, ISSN 0906-0588, Vol. 10, no 3, p. 63-Article in journal (Other academic)
  • 20650.
    Örnemark, Ulf
    SP – Sveriges Provnings- och Forskningsinstitut.
    Metrology in chemistry - Enquiry concerning the current situation and future needs in Sweden conducted for the Regular Committee of the SMT-programme.1998Report (Refereed)
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