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  • Salminen-Karlsson, Minna
    Uppsala University, University Administration, Human Resources Division.
    The FESTA handbook of organizational change: Implementing gender equality in higher education and research organizations2016Book (Other (popular science, discussion, etc.))
  • Public defence: 2017-06-09 10:15 D3, Stockholm
    Shokri-Ghadikolaei, Hossein
    KTH, School of Electrical Engineering (EES), Network and Systems engineering. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
    Millimeter-wave Networking: Fundamental Limits, Scalable Algorithms, and Design Insights2017Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The current demands for extremely high data rate wireless services and the spectrum scarcity at the sub-6 GHz bands are forcefully motivating the use of the millimeter-wave (mmWave) frequencies. The main characteristics of mmWave communications are severe attenuation, sparse-scattering environment, huge bandwidth, vulnerability to obstacles and antenna misalignment, massive beamforming, and possible noise-limited operation. These characteristics constitute a major difference with respect to legacy communication technologies, primarily designed for the sub-6 GHz bands, and are posing major theoretical design challenges that have not been sufficiently addressed so far. Motivated by these challenges, this doctoral thesis considers mmWave communications and investigates medium access control (MAC) layer design principles and performance analysis. Specifically, we focus on fundamental performance metrics, including coverage, fairness, robustness, throughput, and delay, which we address by three main research threads of increasing complexity.

    The first thread of the thesis analyzes the interference behavior in mmWave networks.We first propose a new index for assessing the accuracy of any interference model under any network scenario, which helps us develop a simple interference model of adequate accuracy. We then derive closed-form expressions for the throughput of mmWave ad hoc networks. The new analysis reveals that mmWave networks may exhibit a non-negligible transitional behavior from a noise-limited to an interference-limited behavior, depending on the system parameters such as density of transmitters, transmission power, and operating beamwidth. The second thread of this thesis builds on the previous one and addresses resource allocation in mmWave networks. For the short-term resource allocation, we establish a mathematical framework to investigate the impact of beam training (alignment) overhead on the network throughput. For the long-term resource allocation, we formulate a series of optimization problems that address relaying capability, frequent handovers, small multiuser interference, and load balancing. The third thread of this thesis extends the second one toward spectrum sharing in mmWave networks and characterizes the gains of beamforming and coordination in spectrum sharing via several optimization problems. We analyze these problems in the asymptotic regimes when the number of antennas becomes large and conclude that spectrum sharing with light on-demand coordination is feasible, especially at higher mmWave frequencies (for example, 73 GHz).

    The original analysis proposed in this thesis gives novel insights into many MAC layer issues such as resource allocation, interference management, random access, mobility management, and synchronization in future mmWave networks. The thesis also highlights that the design of mmWave networks poses open problems at the intersection of optimization and learning theories. Given the recent interest in the standardization of mmWave cellular networks and the highly sub-optimal nature of the existing standards for mmWave short-range networks, the results of this thesis may have the potential to substantially steer future standardizations.

  • Ngaruye, Innocent
    et al.
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, Faculty of Science & Engineering. Department of Mathematics, College of Science and Technology, University of Rwanda.
    von Rosen, Dietrich
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, Faculty of Science & Engineering. Department of Energy and Technology, Swedish University of Agricultural Sciences.
    Singull, Martin
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, Faculty of Science & Engineering.
    Small area estimation with missing data using a multivariate linear random effects model2017Report (Other academic)
    Abstract [en]

    In this article small area estimation with multivariate data that follow a monotonic missing sample pattern is addressed. Random effects growth curve models with covariates are formulated. A likelihood based approach is proposed for estimation of the unknown  parameters. Moreover, the prediction of random effects and predicted small area means are also discussed.

  • Jonsson, Robert
    et al.
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Syssner, Josefina
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Demografianpassad infrastruktur?: Om hantering av anläggnings-tillgångar i kommuner med minskande befolkningsunderlag2016In: Nordisk Administrativt Tidsskrift, E-ISSN 2246-1310, Vol. 93, no 3, 45-64 p.Article in journal (Refereed)
    Abstract [sv]

    Vi har i en rad studier undersökt huruvida effekter och policyimplikationer av långvarig befolkningsminskning beskrivs i kommunala styrdokument. Denna artikel bygger på en delstudie vars övergripande syfte varit att öka förståelsen för hur man i krympande kommuner hanterar och planerar för sina anläggningstillgångar. Vi har här intresserat oss specifikt för huruvida kommunerna i budget och årsredovisningar beskriver sina anläggningstillgångar avseende status och underhåll. Vi har också intresserat oss för i vilken mån kommunerna i dessa dokument drar slutsatser om vilka konsekvenser en förändrad demografi har för hur kommunerna ska planera för sina anläggningstillgångar. Syftet med vår art ikel är därmed att diskutera i vilken mån kommunernas budgetar och årsredovisningar är sammanhang där kommunerna beskriver sina anläggningstillgångar avseende status och underhåll, och huruvida kommunerna här beskriver strategier för hur anläggningstillgångarna ska kunna anpassas till en ny demografisk situation. Strategier kan finnas i andra dokument, men budget och årsredovisningar är för kommunerna tvingande dokument som underställs kommunfullmäktige varje år. I dessa dokument ska kommunerna inför medborgarna redogöra på vilket sätt de svarar upp mot kraven på god ekonomisk hushållning. Anläggningstillgångarnas status, underhåll och demografianpassning har dessutom uppenbara ekonomiska implikationer, vilket gör att budget och årsredovisning torde vara de styrdokument där kommunen i första hand beskriver dessa förhållanden.

    Vår ambition har varit att undersöka kommuner som har ett minskande befolkningsunderlag, men som i övrigt har varierande förutsättningar och karaktär. Studien baseras därför på ett systematiskt urval av kommuner, där urvalet baserades på geo-grafiskt läge, närhet till större tätort samt befolkningsstorlek.

  • Höjer, Jan
    Om zoologiska skyddsvärden vid Klarälven, Dalälven, Ljusnan, Ljungan och Indalsälven: Rapport november 1973 till statens naturvårdsverk för utredningen rörande vattenkraftutbyggnad i södra Norrland och Norra Svealand1973Report (Other academic)
    Abstract [sv]

    Rapport november 1973 till statensnaturvårdsverk för utredningen rörande vattenkraftutbyggnad i södra Norrlandoch norra Svealand

  • Hansson, Kenth
    et al.
    Executive, Universitet, Uppsala University.
    Wikström, Gunnar
    Executive, Universitet, Uppsala University.
    Gröntjärn- ett Naturfenomen eller...1975Report (Other academic)
    Abstract [sv]

    Fältarbetet utfördes under tiden 8/4 - 10/4, 2/5 – 6/7 1974 samt vid ett flertal tillfällen under hösten 1974. Under tiden 5/5 – 6/7 bodde vi i Bergvik och Ala:s stuga vid Gröntjärn.

    SAMMANFATTNING OCH SLUTSATSER

    Det undersökta området är beläget i ett mäktigt stråk av isälvsavlagringar norr om Ljusdal.  Gröntjärn och Strå sjö-Långtjärn utgörs av dödisgravar på ömse sidor om en hög brant ås. Gröntjärn saknar både ytligt tillopp och ytligt avlopp.

    En ytvattenförbindelse mellan Gröntjärn och Benbergsbäcken kan uppstå vid mycket höga vattenstånd i tjärnen väster om Gröntjärn. En fåra i den rygg som avskiljer från varandra tyder på att så har varit fallet någon gång.

  • Sjörs, Hugo
    Executive, Universitet, Uppsala University.
    Om botaniska skyddsvärden vid älvarna: Växtbiologiska institutionen Uppsala 19731973Report (Other academic)
    Abstract [sv]

    I samband med den markanvändningsplanering, som pågår i anslutning till omarrondering inom Lill sidan i Järvsö , har det ansetts nödvändigt att inventera och i stora drag prioritera olika områden ur naturvårdssynpunkt . Ljusdals kommun har därför uppdragit åt undertecknad att utföra inventering och bedömning av `` vetenskaplig kulturell naturvårdssynpunkt`` inom Lill sidan. i samråd med Länsstyrelsens naturvårdsenhet och lantmäteriets specialenhet nr 2 i Gävleborg län har inventeringen begränsats till de   områden; huvudsakligen om fattande älv-, sjö –och odlingslandskapet, som redovisas på bifogade karta .

    Fältarbete och sammanställning av inventeringsresultaten har utförts i oktober 1971. avgränsning  

  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Hagren, Kristina (Contributor)
    Ordbok över folkmålen i övre Dalarna: Häfte 30, S-Skata1991Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 29, illustrationer. L-R1989Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 28, Rum-Rövtrå1989Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 27, Pölig-Rum1988Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 26, Papperspåse-Pöla1987Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 25, Näta-Papperslösning1986Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 24, Mölig-Nät1985Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 23, M(j)ölningshus-MölaII1984Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 22, Mackaberus-M(j)ölning1983Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 21, Ljutfågel-Lövåma1982Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 20, Labb-Ljute1981Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 19, illustrationer. G-K1980Book (Other academic)
  • Public defence: 2017-06-12 13:00 V1, STOCKHOLM
    Hamisi, Rajabu
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
    Modelling phosphorus dynamics in constructed wetlands upgraded with reactive filter media2017Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Phosphorus mobility and sorption mechanisms underlying the removal efficiency of different adsorbent media were evaluated using the SWAT model and 3Dreactive transport model. The aims of the thesis were to: i) improve understanding of phosphorus mobility in the Oxundaån catchment; ii) identify suitable sites for constructing wetlands; iii) develop the numerical reactive transport model in order to identify key parameters which affects sorption efficiencies of the reactive adsorbent media; iv) predict the media's sorption efficiencies; and v) evaluate the viable reactive adsorbent media for mitigating eutrophication in the Baltic Sea. To predict phosphorus removal efficiencies of the adsorbent media and visualize the sorption process within the constructed wetlands, a three-dimensional model was developed within the COMSOL Multiphysics®. The reactive transport model was developed by coupling four physics interfaces to simulate the processes of water flow dynamics, transport of diluted phosphorus species, reaction kinetics and heat transfer in the porous media. The SWAT modelling results showed that arable land with the less background phosphorus retention, lower soil permeability and lower land slope could provide suitable sites for constructing wetlands. The simulated phosphorus sorption efficiency of the reactive filter media was ranked: 88 % (113 g P kg-1) for Polonite®, 85 % (81gP kg-1) for Filtralite P®, 62 % (61 gPkg-1) for Blast furnace slag, 57 % (44gP kg-1) for Wollastonite. In comparison to other media, Polonite® was observed to be a suitable reactive adsorbent media for wetland applications under different hydraulic loading rates and pH change, whose P-removal efficiency last for six years. Moreover, the modelling results showed less significant effects of particle size on the phosphorus removal efficiency as compared to solution pH and Ca mineral content. Precipitation was identified to be the dominant mechanisms for phosphorus removal in these media with the positive correlation to pH increase (R2 = 0.94, p-value = 0.002) and Calcium content (R2 = 0.73, p-value = 0.004). The good agreements between the simulated outputs and experimental data accurately captured the processes of phosphorus mobility and removal. The results suggest that the reactive transport models are valuable tools for providing insight into sorption processes in subsurface systems and improving design criteria for constructed wetlands. More experimental data are needed to calibrate the sensitivity of local parameters in order to better assess the performance of subsurface flow constructed wetlands.

  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 18, Kvarndygn-Kövis1980Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 17, Kolpa-Kvarndel1979Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 16, Klabbmölja-Kolp1977Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 15, Jaga-Klabbklubbe1977Book (Other academic)
  • Public defence: 2017-06-14 13:15 Hörsal 2, Uppsala
    Launberg, Anna
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Creating value from science: Interaction between academia, business and healthcare in the Uppsala PET Centre case2017Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Recent decades have seen greater focus, both national and global, on universities’ role in boosting economic growth. Besides teaching and conducting research, universities are urged to contribute directly to the economy by commercialising research findings and interacting with industry.

    This thesis explores the dynamics and effects of such interplay by concentrating on a particular case of interaction involving Uppsala University, Uppsala University Hospital and a large multinational corporation. More specifically, the aim of the study was to investigate how use of science and value creation from science are affected when actors belonging to disparate spheres interact closely. The thesis recounts the evolution of the Uppsala PET Centre, established as a University research institute in 1989, which has served both as a site for pre-clinical and clinical research and as an important resource in routine clinical work. The whole Centre was commercialised when a large firm acquired it in 2002, only to be decommercialised and returned to the University and the University Hospital less than a decade later.

    Using a network perspective, this thesis analyses the journey of the Uppsala PET Centre by studying interfaces between physical and organisational resources. The basic argument is that to understand the effects of inter-sphere interaction on science use, one must consider the materiality of science and differences between the interacting actor spheres in terms of preferences, norms and goals – ‘schemes of valuation’ in the present work. The study shows that the materiality of science has a restrictive impact on flexibility of science use, and different actors’ simultaneous use of science is therefore severely constrained. Because of these constraints, the actor spheres involved struggle to control physical scientific resources in ways aligned with their particular schemes of valuation. Sharing, turn-taking and efforts to separate overlapping use contexts become the means of managing the restricted scope for science use.

    Further, this thesis demonstrates that while interfaces containing physical resources are controllable and always result in some kind of value (albeit not necessarily on the scale expected), the outcomes of combinations of organisational resources connected with disparate schemes of valuation are impossible to anticipate and control.

    The thesis concludes that there are reasons to rethink our expectations of the short-term economic and social effects of university–industry interaction, a complicated affair that encompasses opportunities and unforeseeable challenges alike.

  • Levander, Lars
    et al.
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Björklund, Stig
    Institute for Language and Folklore, Department of Dialectology and Folklore Research, Uppsala.
    Ordbok över folkmålen i övre Dalarna: Häfte 14, Hårdnacke-Jag1976Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 13, Hejda-Hårdnackad1974Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 12, Gälma-Hejd1973Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 11, Granlöp-Gällsol1971Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 10, Gadd-Granlave1970Book (Other academic)
  • Li, Ying Zhen
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Ingason, Haukur
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    New models for calculating maximum gas temperatures in large tunnel fires2016Report (Other academic)
    Abstract [en]

    The work presented in this report focuses on estimating maximum gas temperatures at ceiling level during large tunnel fires. Gas temperature is an important parameter to consider when designing the fire resistance of a tunnel structure. Earlier work by the authors has established correlations between excess ceiling gas temperature and effective tunnel height, ventilation rate, and heat release rate. The maximum possible excess gas temperature was set as 1350°C, independent of the tunnel structure and local combustion conditions. As a result of this research, two models have been developed to better estimate possible excess maximum gas temperatures for large tunnel fires in tunnels with differing lining materials and structure types (e.g. rock, concrete). These have been validated using both model- and full-scale tests. Comparisons of predicted and measured temperatures show that both models correlate well with the test data. However, Model I is better and more optimal, due to the fact that it is more conservative and easier to use. The fire duration and flame volume are found to be related to gas temperature development. In reality, the models could also be used to estimate temperatures in a fully developed compartment fire.

  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 9, illustrationer. A-F1970Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 8, Fubbla-Föttling1968Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 7, FjäreIII-Fubbig1968Book (Other academic)
  • Public defence: 2017-06-14 10:00 B2, Stockholm
    Yin, Jiaqing
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Physical Metallurgy.
    Formation of Bainite in Steels2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    A systematic survey of morphology of bainite and proeutectoid ferrite was carried out in order to validate some old thoughts of bainite transformation mechanism. It is confirmed that there is no morphological evidence supporting a sharp change neither between Widmanstätten ferrite and the ferritic component of upper bainite, nor between upper and lower bainite. Both Widmanstätten ferrite and upper bainite start with precipitation of ferrite plates at a grain boundary while lower bainite starts with intragranular nucleation. In case of grain boundary nucleation, a group of parallel plates with same crystallographic orientation to the parent austenite grain forms. This process is followed by a second stage of decomposition of the austenitic interspace, which remained in between the primary ferrite plates. At high temperature, the austenitic interspace would either retain as thin slabs or transform into pearlite through a nodule originated from a grain boundary. At lower temperature, cementite precipitation starts to be possible and initiates simultaneous growth of ferrite. Generally, there are two modes of such eutectoid reactions operating in the second stage, i.e. a degenerate and a cooperative mode, which would lead to typical upper and lower bainite, respectively, in definition of carbides morphology. Both upper and lower bainite according to this definition are observed in a wide temperature range. A sharp temperature between the upper and lower bainite structures thus exists only when the definition is based on their nucleation sites, i.e. grain boundary nucleation for upper bainite and intragranular nucleation for lower bainite. Supposing that the first stage is a diffusionless process it should have a high growth rate to prevent carbon diffusion. This is not supported by lengthening rate obtained in current study as well as data from literature for Fe-C alloys. Finally, it is shown that the “subunits” play no role in the lengthening process of bainite.

  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 6, Dölsk-Fjäre1966Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 5, Disk-Dölja1965Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 4, Bröstkrave-Dishorn1964Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 3, Bogsera-Bröstsjuka1963Book (Other academic)
  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 2, Barka-Bogräs1962Book (Other academic)
  • Tjulin, Åsa
    et al.
    Mälardalens Högskola.
    Norén, Liselotte
    Folkhälsoutbildning i entreprenörskap –kan en pantomat bli en del avsamhällsutvecklingen?2016In: Socialmedicinsk Tidskrift, ISSN 0037-833X, no 5, 604-611 p.Article in journal (Refereed)
    Abstract [en]

    ”You can do things and make a difference”. This article will give you an insightin how a social innovation can serve as a case study in an undergraduatecourse in entrepreneurship within health and welfare at Mälardalensuniversity. Students can become active participants in their learning bypedagogical approaches that invites them to feel that they do can make achange. In this article you will learn how to combine the work of a real lifecase study and an active social entrepreneur with pedagogical methods thatseek to awake and activate students in their learning process. During twosessions the students are on a journey that illustrate the initial idea of how toimprove the social determinates from health in the local community to implementchanges that make a difference for health. The students are also askedto give feedback on improvements of the social innovation at hand.

  • Levander, Lars
    et al.
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Björklund, Stig
    Institute for Language and Folklore, Uppsala landsmålsarkiv (ULMA).
    Ordbok över folkmålen i övre Dalarna: Häfte 1, A-Barka1961Book (Other academic)
  • Melén Fäldt, Maria
    Kristianstad University, Learning Resource Centre.
    Högskolepedagogisk debatt: Läraktiviteter för att uppnå värderingsförmåga och förhållningssätt2017Collection (editor) (Other (popular science, discussion, etc.))
  • Public defence: 2017-06-15 10:00 M311, Stockholm
    Daemi, Bita
    KTH, School of Industrial Engineering and Management (ITM), Production Engineering.
    Enhanced image analysis, a tool for precision metrology in the micro and macro world2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The need for high speed and cost efficient inspection in manufacturing lineshas led to a vast usage of camera-based vision systems. The performance ofthese systems is sufficient to determine shape and size, but hardly to an accuracylevel comparable with traditional metrology tools. To achieve highprecision shape/position/defect measurements, the camera techniques haveto be combined with high performance image metrology techniques whichare developed and adapted to the manufactured components. The focus ofthis thesis is the application of enhanced image analysis as a tool for highprecision metrology. Dedicated algorithms have been developed, tested andevaluated in three practical cases ranging from micro manufacturing at submicronprecision to meter sized aerospace components with precision requirementsin the 10 μm range.The latter measurement challenge was solved by low cost standard consumerproducts, i.e. digital cameras in a stereo configuration and structured lightfrom a gobo-projector. Combined with high-precision image analysis and anew approach in camera calibration and 3D reconstruction for precise 3Dshape measurement of meter sized surfaces, the achievement was fulfilledand verified by two conventional measurement systems; a high precisioncoordinate measurement machine and a laser scanner.The sub-micron challenge was the implementation of image metrology forverification of micro manufacturing installations within a joint Europeaninfrastructure network, EUMINAfab. The results were an unpleasant surprisefor some of the participating laboratories, but became a big step forwardto improve the dimensional accuracy of the investigated laser micromachining, micro milling and micro-printing systems, since the accuracy ofthese techniques are very difficult to assess.The third high precision metrology challenge was the measurement of longrange,low-amplitude topographic structures on specular (shiny) aerodynamicsurfaces. In this case Fringe Reflection Technique (FRT) was appliedand image analysis algorithms were used to evaluate the fringe deformationas a measure of the surface slopes to obtain high resolution data. The resultwas compared with an interferometric analysis showing height deviation inthe range of tens of micrometers over a lateral extension of several cm.

  • Public defence: 2017-06-14 09:15 Room 2005, Uppsala
    Xu, Chao
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
    Non-aqueous Electrolytes and Interfacial Chemistry in Lithium-ion Batteries2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Lithium-ion battery (LIB) technology is currently the most promising candidate for power sources in applications such as portable electronics and electric vehicles. In today's state-of-the-art LIBs, non-aqueous electrolytes are the most widely used family of electrolytes. In the present thesis work, efforts are devoted to improve the conventional LiPF6-based electrolytes with additives, as well as to develop alternative lithium 2-trifluoromethyl-4,5-dicyanoimidazole (LiTDI)-based electrolytes for silicon anodes. In addition, electrode/electrolyte interfacial chemistries in such battery systems are extensively investigated.

    Two additives, LiTDI and fluoroethylene carbonate (FEC), are evaluated individually for conventional LiPF6-based electrolytes combined with various electrode materials. Introduction of each of the two additives leads to improved battery performance, although the underlying mechanisms are rather different. The LiTDI additive is able to scavenge moisture in the electrolyte, and as a result, enhance the chemical stability of LiPF6-based electrolytes even at extreme conditions such as storage under high moisture content and at elevated temperatures. In addition, it is demonstrated that LiTDI significantly influences the electrode/electrolyte interfaces in NMC/Li and NMC/graphite cells. On the other hand, FEC promotes electrode/electrolyte interfacial stability via formation of a stable solid electrolyte interphase (SEI) layer, which consists of FEC-derivatives such as LiF and polycarbonates in particular.

    Moreover, LiTDI-based electrolytes are developed as an alternative to LiPF6 electrolytes for silicon anodes. Due to severe salt and solvent degradation, silicon anodes with the LiTDI-baseline electrolyte showed rather poor electrochemical performance. However, with the SEI-forming additives of FEC and VC, the cycling performance of such battery system is greatly improved, owing to a stabilized electrode/electrolyte interface.

    This thesis work highlights that cooperation of appropriate electrolyte additives is an effective yet simple approach to enhance battery performance, and in addition, that the interfacial chemistries are of particular importance to deeply understand battery behavior.

  • Umair, Muhammad
    Stockholm University, Faculty of Science, Department of Physics.
    Resonances in three-body systems2014Licentiate thesis, monograph (Other academic)
    Abstract [en]

    Three particles interacting via Coulomb forces represents a fundamental problem in quantum mechanics whose approximate solution provides some insight into the more complex analysis associated with few-body problems. We have investigated resonance states composed of three particles interacting via Coulombic and more general potentials in non-relativistic quantum mechanics, using the complex scaling method. My calculations have been applied to two different physical systems: (i) an investigation of the possibility of resonances in the $p e \mu$ system, which has been suggested as a possible reason for unexpected results from a recent measurement of the proton radius in muonic hydrogen (ii) a calculation of resonances in positron-hydrogen scattering, which shows that we can represent this system with the accuracy needed for future scattering calculations. The basis set used is built from Gaussians in Jacobi coordinates, thus automatically including mass-polarisation effects which cannot be neglected in muonic systems.

  • Sandström, Helena
    Stockholm University, Faculty of Science, Department of Physics.
    Contouring variability in radiosurgery - dosimetric and radiobiological implications2015Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The use of Stereotactic Radiation Therapy (SRT) employing one large fraction of radiation, as in stereotactic radiosurgery (SRS), or few fractions of high doses, has continuously increased due to the technical development and the progress in dose delivery complemented by the positive clinical experience. The success of stereotactic radiation therapy depends on many clinical, dosimetric and radiobiological factors. For SRS in particular, the delivery of a highly conformal dose distribution to the target in one fraction allowing at the same time the sparing of the normal tissue and the critical structures is part of the basic concept of the technique. Provided that the highly accurate radiosurgical equipment available today is used, planning and delivering the prescribed dose distribution is an achievable goal, and therefore the main issue to be solved is the definition of the target. As the target volume in radiosurgery is usually defined without margins, the success of the stereotactic approach critically depends on the accurate delineation of the target which could be identified as a factor of key importance. In addition, the delineation of the Organs At Risk (OAR) is also critical.

    The purpose of this work was to evaluate the current degree of variability for target and OAR contouring and to establish methods for analysing multi-observer data regarding structure delineation variability.

    A multi-center target and OAR delineation study was initiated. Two complex and six common cases to be treated with SRS were selected and subsequently distributed to centers around the world performing Gamma Knife® radiosurgery for delineation and treatment planning. The resulting treatment plans and the corresponding delineated structures were collected and analysed.   

    Results showed a very high variability in contouring for four complex radiosurgery targets. Similar results indicating high variability in delineating the OAR and reporting the doses delivered to them were also reported. For the common radiosurgery targets however, a higher agreement in the delineation was observed, although lower than expected.

    The assessment of the quality of treatment planning for radiosurgery is usually performed with respect to the coverage of the target, the planning specificity, and dose to the sensitive structures and organs close to the target. However, physical dose conformity to the target does not guarantee the success of the treatment. The assessment of the plan quality should also be performed with respect to the clinical outcome expressed as probability of controlling the target that should be irradiated. In this respect, this study also aimed to create the framework for assessing the impact of the inaccuracy in delineating the target on the predicted treatment outcome for radiosurgery targets known for their high potential to invade the neighbouring normal tissue, using radiobiological models. In addition, radiobiological models have also been used to determine the tumour control probability accounting for the oxygenation for stereotactic radiation therapy targets.

    The results suggest that radiobiological modelling has the potential to add to the current knowledge in SRS by theoretically assessing the key factors that might influence the treatment outcome.

  • Rebrov, Oleksii
    Stockholm University, Faculty of Science, Department of Physics.
    Chiral Recognition by Means of Mass Spectrometry2016Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis is based on experimental studies of chiral ions in the gas-phase. An electrospray ion source platform (Stockholm University) and a commercially available quadrupole time-of-flight mass spectrometer (University of Oslo) have been used in our studies.

    Using the advantages of tandem mass spectrometry, we have investigated interactions between protonated amino acids, namely phenylalanine (Phe), tryptophan (Trp), and methionine (Met), and Trp containing diastereomeric complexes with chiral (2-butanol) and achiral (argon) targets. In high energy collisions of 1 keV in the center-of-mass (c.o.m.) frame, collision induced dissociation (CID) via multiple channels independent on the chirality of either the projectile or the target was observed. The fragmentation via loss of H2O + CO and NH3 were found to be the main reaction channels for all of the studied amino acids. The energy gained in the collision was found to be sufficient to initiate fragmentation via various competitive reaction pathways.

    Chiral recognition in CID of the diastereomeric proton-bound complexes of tryptophan and 2-butanol as a function of collision energy with argon was studied. Stereo dependent dissociation of the complexes was observed, and for the first time an energy dependence has been measured for such a complex. Where possible, comparisons with previously reported results have been performed.

  • Kvorning, Thomas
    Stockholm University, Faculty of Science, Department of Physics.
    Adding Majorinos to Superconductors2014Licentiate thesis, monograph (Other academic)
    Abstract [en]

    States of matter with quasi-particle excitations that exhibit anyonic statisticsare of great theoretical interest, especially in those cases where the anyons arenon-Abelian. Two of the most promising states that could support non-Abeliananyons are the ν = 5/2 quantum Hall state and the two dimensional p-wavesuperconductor, and they can both be understood as p-wave paired states. Themotivation for the present thesis is to get a better understanding of the theo-retical description of p-wave paired states.In the accompanying paper we construct an effective field theory for the 2Dspin-less p-wave paired superconductor that faithfully describes the topologicalproperties of the bulk state, and also provides a model for the subgap statesat vortex cores and edges. In particular it captures the topologically protectedzero modes and has the correct ground state degeneracy on the torus. Wealso show that our effective field theory becomes a topological field theory in awell defined scaling limit and that the vortices have the expected non-Abelianbraiding statistics.

  • Khan, Shehryar
    Stockholm University, Faculty of Science, Department of Physics.
    Zero-Field Splitting in Gd(III) complexes: Towards a molecular understanding of paramagnetic relaxation2015Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The prime objectives of contrast agents in Magnetic Resonance Imaging(MRI) is to accelerate the relaxation rate of the solvent water protons in the surrounding tissue. Paramagnetic relaxation originates from dipole-dipole interactions between the nuclear spins and the fluctuating magnetic field induced by unpaired electrons. Currently Gadolinium(III) chelates are the most widely used contrast agents in MRI, and therefore it is incumbent to extend the fundamental theoretical understanding of parameters that drive the relaxation mechanism in these complexes.

    Traditionally the Solomon-Bloembergen-Morgan equations have been utilized to describe relaxation times in terms, primarily of the Zeeman interaction, which is the splitting of degenerate energy levels due to an applied magnetic field. However, in compounds such as Gadolinium(III) complexes with total electron spins higher than 1 (in this case S=7/2) other interactions such as the Zero-Field Splitting(ZFS) play a significant role. ZFS is the splitting of degenerate energy levels in the absence of an external magnetic field. For this purpose, the current research delves into an understanding of the relaxation process, focusing on ZFS in various complexes of interest, using quantum chemical methods as well as molecular dynamic simulations.