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  • 1167001.
    Östberg, Per-Olov
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Espling, Daniel
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Elmroth, Erik
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Decentralized scalable fairshare scheduling2013In: Future generations computer systems, ISSN 0167-739X, E-ISSN 1872-7115, Vol. 29, no 1, p. 130-143Article in journal (Refereed)
    Abstract [en]

    This work addresses Grid fairshare allocation policy enforcement and presents Aequus, a decentralized system for Grid-wide fairshare job prioritization. The main idea of fairshare scheduling is to prioritize users with regard to predefined resource allocation quotas. The presented system builds on three contributions: a flexible tree-based policy model that allows delegation of policy definition, a job prioritization algorithm based on local enforcement of distributed fairshare policies, and a decentralized architecture for non-intrusive integration with existing scheduling systems. The system supports organization of users in virtual organizations and divides usage policies into local and global policy components that are defined by resource owners and virtual organizations. The architecture realization is presented in detail along with an evaluation of the system behavior in an emulated environment. In the evaluation, convergence noise types (mechanisms counteracting policy allocation convergence) are characterized and quantified, and the system is demonstrated to meet scheduling objectives and perform scalably under realistic operating conditions.

  • 1167002.
    Östberg, Per-Olov
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Groenda, Henning
    Wesner, Stefan
    Byrne, James
    Nikolopoulos, Dimitris S.
    Sheridan, Craig
    Krzywda, Jakub
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Ali-Eldin, Ahmed
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Tordsson, Johan
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Elmroth, Erik
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Stier, Christian
    Krogmann, Klaus
    Domaschka, Jörg
    Hauser, Christopher B.
    Byrne, PJ
    Svorobej, Sergej
    McCollum, Barry
    Papazachos, Zafeiros
    Whigham, Darren
    Rüth, Stefan
    Paurevic, Dragana
    The CACTOS Vision of Context-Aware Cloud Topology Optimization and Simulation2014In: 2014 IEEE 6th International Conference on Cloud Computing Technology and Science, 2014, p. 26-31Conference paper (Refereed)
    Abstract [en]

    Recent advances in hardware development coupled with the rapid adoption and broad applicability of cloud computing have introduced widespread heterogeneity in data centers, significantly complicating the management of cloud applications and data center resources. This paper presents the CACTOS approach to cloud infrastructure automation and optimization, which addresses heterogeneity through a combination of in-depth analysis of application behavior with insights from commercial cloud providers. The aim of the approach is threefold: to model applications and data center resources, to simulate applications and resources for planning and operation, and to optimize application deployment and resource use in an autonomic manner. The approach is based on case studies from the areas of business analytics, enterprise applications, and scientific computing.

  • 1167003. Östberg, Per-Olov
    et al.
    Hellander, Andreas
    Drawert, Brian
    Elmroth, Erik
    Holmgren, Sverker
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computational Science.
    Petzold, Linda
    Abstractions for scaling eScience applications to distributed computing environments: A StratUm integration case study in molecular systems biology2012In: Proc. 3rd International Conference on Bioinformatics Models, Methods and Algorithms, Setúbal, Portugal: SciTePress , 2012, p. 290-294Conference paper (Refereed)
  • 1167004.
    Östberg, Per-Olov
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Hellander, Andreas
    Drawert, Brian
    Elmroth, Erik
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Holmgren, Sverker
    Petzold, Linda
    Abstractions for scaling escience applications to distributed computing environments: a StratUm Integration Case Study in Molecular Systems Biology2012In: Bioinformatics: proceedings of the international conference on bioinformatics models, methods and algorithms / [ed] Correia, C; Fred, A; Gamboa, H; Schier, J, SETUBAL: SCITEPRESS , 2012, p. 290-294Conference paper (Other academic)
    Abstract [en]

    Management of eScience computations and resulting data in distributed computing environments is complicated and often introduces considerable overhead. In this work we address a lack of integration tools that provide the abstraction levels, performance, and usability required to facilitate migration of eScience applications to distributed computing environments, In particular, we explore an approach to raising abstraction levels based on separation of computation design computation management and present StratUm, a computation enactment tool for distributed computing environments. Results are illustrated in a case study of integration of a software from the systems biology community with a grid computation management system.

  • 1167005.
    Östberg, Per-Olov
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Hellander, Andreas
    University of California, Santa Barbara, USA.
    Drawert, Brian
    University of California, Santa Barbara, USA.
    Elmroth, Erik
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Holmgren, Sverker
    Uppsala University, Sweden.
    Petzold, Linda
    University of California, Santa Barbara, USA.
    Reducing Complexity in Management of eScience Computation2012In: CCGrid 2012: Proceedings of the 12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing / [ed] Balaji, P., Buyya, R., Majumdar, S., Pandey, S., IEEE, 2012, p. 845-852, article id 6217522Conference paper (Refereed)
    Abstract [en]

    In this paper we address reduction of complexity in management of scientific computations in distributed computing environments. We explore an approach based on separation of computation design (application development) and distributed execution of computations, and investigate best practices for construction of virtual infrastructures for computational science - software systems that abstract and virtualize the processes of managing scientific computations on heterogeneous distributed resource systems. As a result we present StratUm, a toolkit for management of eScience computations. To illustrate use of the toolkit, we present it in the context of a case study where we extend the capabilities of an existing kinetic Monte Carlo software framework to utilize distributed computational resources. The case study illustrates a viable design pattern for construction of virtual infrastructures for distributed scientific computing. The resulting infrastructure is evaluated using a computational experiment from molecular systems biology.

  • 1167006. Östberg, Per-Olov
    et al.
    Hellander, Andreas
    Drawert, Brian
    Elmroth, Erik
    Holmgren, Sverker
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computational Science.
    Petzold, Linda
    Reducing complexity in management of eScience computations2012In: Proc. 12th International Symposium on Cluster, Cloud and Grid Computing, Los Alamitos, CA: IEEE Computer Society, 2012, p. 845-852Conference paper (Refereed)
  • 1167007.
    Östberg, Per-Olov
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Lockner, Niclas
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Creo: reduced complexity service development2014In: Proceedings of CLOSER 2014 - 4th International Conference on Cloud Computing and Services Science / [ed] M. Helfert, F. Desprez, D. Ferguson, F. Leymann, V. Mendez Munoz, SciTePress, 2014, p. 230-241Conference paper (Refereed)
    Abstract [en]

    In this work we address service-oriented software development in distributed computing environments, and investigate an approach to software development and integration based on code generation. The approach is illustrated in a toolkit for multi-language software generation built on three building blocks; a service description language, a serialization and transport protocol, and a set of code generation techniques. The approach is intended for use in the eScience domain and aims to reduce the complexity of development and integration of distributed software systems through a low-knowledge-requirements model for construction of network-accessible services. The toolkit is presented along with a discussion of use cases and a performance evaluation quantifying the performance of the toolkit against selected alternative techniques for code generation and service communication. In tests of communication overhead and response time, toolkit performance is found to be comparable to or improve upon the evaluated techniques.

  • 1167008.
    Östberg, Per-Olov
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Lockner, Niclas
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Reducing Complexity in Service Development and Integration2015In: Cloud computing and services sciences, CLOSER 2014, Springer Berlin/Heidelberg, 2015, p. 63-80Conference paper (Refereed)
    Abstract [en]

    The continuous growth and increasing complexity of distributed systems software has produced a need for software development tools and techniques that reduce the learning requirements and complexity of building distributed systems. In this work we address reduction of complexity in service-oriented software development and present an approach and a toolkit for multi-language service development based on three building blocks: a simplified service description language, an intuitive message serialization and transport protocol, and a set of code generation techniques that provide boilerplate environments for service implementations. The toolkit is intended for use in the eScience domain and is presented along with a performance evaluation that quantifies toolkit performance against that of selected alternative toolkits and technologies for service development. Toolkit performance is found to be comparable to or improve upon the performance of evaluated technologies.

  • 1167009.
    Östberg, Pär
    Dalarna University, School of Technology and Business Studies, Information Systems.
    Användbarhetstest i samband med utveckling av webbplats2003Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Varje år lägger företag ner hundratusentals kronor för egna webbplatser. När programmerare och ledning är nöjda med utseende och funktionalitet sätts webbplatsen i bruk. Det är ofta först nu som företaget får in respons på om webbplatsen från användarna. I vissa fall blir detta en katastrof eftersom fel produkt erbjuds till användaren eller att användaren inte förstår hur han ska använda produkten. För att förhindra detta problem på bästa möjliga sätt används användbarhetstest för att utreda vad användaren av det blivande systemet vill ha innan systemet distribueras. Målet med examensarbetet är att konstruera en webbplats avsedd för den kommande utbildningen Creative business management. Syftet är därefter att visa hur användbarhetstest på bästa möjliga sätt bör användas i samband med utvecklingsarbetet av webbplatser. Utvecklingsarbetet sker med hjälp av en anpassad version av Siegels utvecklingsmodell. För att utföra användbarhetstest används sedan Molich modell för användbarhetstest. Arbetet visar vidare att användbarhetstest bör användas kontinuerligt under hela utvecklingsarbetet för att inte riskera att arbetet glider iväg åt fel riktning. Det krävs endast fem testdeltagare för att finna 80 % av de möjliga användbarhetsproblemen på en webbplats. Det optimala är att använda fem testdeltagare i flera etapper i samband med olika versioner och uppgraderingar av webbplatsen för att kvalitetssäkra arbetet.

  • 1167010.
    Östberg, Rasmus
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Robustness of a neural network used for image classification: The effect of applying distortions on adversarial examples2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Powerful classifiers as neural networks have long been used to recognise images; these images might depict objects like animals, people or plain text. Distorted images affect the neural network's ability to recognise them, they might be distorted or changed due to distortions related to the camera.Camera related distortions, and how they affect the accuracy, have previously been explored. Recently, it has been proven that images can be intentionally made harder to recognise, an effect that last even after they have been photographed.Such images are known as adversarial examples.The purpose of this thesis is to evaluate how well a neural network can recognise adversarial examples which are also distorted. To evaluate the network, the adversarial examples are distorted in different ways and thereafter fed to the neural network.Different kinds of distortions (rotation, blur, contrast and skew) were used to distort the examples. For each type and strength of distortion the network's ability to classify was measured.Here, it is shown that all distortions influenced the neural network's ability to recognise images.It is concluded that the type and strength of a distortion are important factors when classifying distorted adversarial examples, but also that some distortions, rotation and skew, are able to keep their characteristic influence on the accuracy, even if they are influenced by other distortions.

  • 1167011.
    Östberg Rundqvist, Maj
    Örebro University, School of Hospitality, Culinary Arts & Meal Science.
    Hur ska en köttfärssås smaka?: Klimatpåverkan, sensoriska egenskaper och hälsoaspekter ur ett måltidsekologiskt perspektiv2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Inledning: Olika typer av kött har olika stor påverkan på klimatet. Kött från idisslare anses ha högst klimatpåverkan eftersom deras metabolism ger upphov till metangas, samtidigt som idisslare har stort värde som vårdare av det svenska landskapet med öppna marker och biologisk mångfald.

     

    Syfte: Syftet med denna studie var att med hjälp av sensorisk analys studera om köttfärssås tillagad med ekologiskt respektive konventionellt producerat nötkött samt köttfärssås med reducerad mängd kött påverkar konsumenters gillande. Syftet var också att beräkna innehåll av järn och vitamin B12 i köttfärssåserna för att jämföra med rekommenderat näringsinnehåll enligt SNR-05, Svenska näringsrekommendationer.

     

    Metod/material: En kvantitativ datainsamling har gjorts med hjälp av 25 konsumenter som deltagit i sensoriska konsumenttester av köttfärssåser, där ingredienserna dels varit anonyma, dels framgått i klartext.

     

    Resultat: Konsumenter visade större gillande för köttfärssås tillagad av konventionellt producerat nötkött vid anonyma prov och större gillande för köttfärssås tillagad av ekologiskt producerat nötkött när de informerades om innehållet.  Enstaka konsumenter visade gillande för köttfärssås med reducerad mängd kött vid anonyma prov och ett fåtal konsumenter visade gillande för köttfärssås med reducerad mängd kött när de informerades om innehållet. Innehållet av järn och vitamin B12 är tillräckligt i en köttfärssås med reducerad mängd kött enligt SNR-05, Svenska näringsrekommendationer.

     

    Slutsats: Studien visar att det kan vara möjligt att påverka konsumenters uppfattning om en matvara om konsumenten får information om matvarans ursprung.

  • 1167012.
    Östberg, Sara
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Functional Characterization of the Evolutionarily Conserved Adenoviral Proteins L4-22K and L4-33K2014Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Regulation of adenoviral gene expression is a complex process directed by viral proteins controlling a multitude of different activities at distinct phases of the virus life cycle. This thesis discusses adenoviral regulation of transcription and splicing by two proteins expressed at the late phase: L4-22K and L4-33K. These are closely related with a common N-terminus but unique C-terminal domains. The L4-33K protein is an alternative RNA splicing factor inducing L1-IIIa mRNA splicing, while L4-22K is stimulating transcription from the major late promoter (MLP). The L4-33K protein contains a tiny RS-repeat in its unique C-terminal end that is essential for the splicing enhancer function of the protein. Here we demonstrate that the tiny RS-repeat is required for localization of the protein to the nucleus and viral replication centers. Further, we describe an auto-regulatory loop where L4-33K enhances splicing of its own intron. The preliminary characterization of the responsive RNA-element suggests that it differs from the previously defined L4-33K-responsive element activating L1-IIIa mRNA splicing.

    L4-22K lacks the ability to enhance L1-IIIa splicing in vivo, and here we show that the protein is defective in L1-IIIa or other late pre-mRNA splicing reactions in vitro. Interestingly, we found a novel function for the L4-22K and L4-33K proteins as regulators of E1A alternative splicing. Both proteins selectively upregulated E1A-10S mRNA accumulation in transfection experiments, by a mechanism independent of the tiny RS-repeat.

    Although L4-22K is reported to be an MLP transcriptional enhancer protein, here we show that L4-22K also functions as a repressor of MLP transcription. This novel activity depends on the integrity of the major late first leader 5’ splice site. The model suggests that at low concentrations L4-22K activates MLP transcription while at high concentrations L4-22K represses transcription.

    So far, characterizations of the L4-22K and L4-33K proteins have been limited to human adenoviruses 2 or 5 (HAdV-2/5). We expanded our experiments to include HAdV-3, HAdV-4, HAdV-9, HAdV-11 and HAdV-41. The results demonstrated that the transcription- or splicing-enhancing properties of L4-22K and L4-33K, respectively, are evolutionarily conserved and non-overlapping. Thus, the sequence-based conservation is mirrored by the functions, as expected for functionally important proteins.

  • 1167013.
    Östberg, Sara
    et al.
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Backström Winquist, Ellenor
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Science for Life Laboratory, SciLifeLab.
    Akusjärvi, Göran
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Science for Life Laboratory, SciLifeLab.
    RNA elements involved in adenovirus L4-33K regulation of alternative splicingManuscript (preprint) (Other academic)
  • 1167014.
    Östberg, Sara
    et al.
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Biasiotto, Roberta
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Science for Life Laboratory, SciLifeLab.
    Akusjärvi, Göran
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Science for Life Laboratory, SciLifeLab.
    Conservation of the transcriptional and post-­transcriptional activities of serotype-­specific adenovirus L4 proteinsManuscript (preprint) (Other academic)
  • 1167015.
    Östberg, Sara
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Science for Life Laboratory, SciLifeLab.
    Törmänen Persson, Heidi
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala University, Science for Life Laboratory, SciLifeLab.
    Akusjärvi, Göran
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Serine 192 in the tiny RS repeat of the adenoviral L4-33K splicing enhancer protein is essential for function and reorganization of the protein to the periphery of viral replication centers2012In: Virology, ISSN 0042-6822, E-ISSN 1096-0341, Vol. 433, no 2, p. 273-281Article in journal (Refereed)
    Abstract [en]

    The adenovirus L4-33K protein is a key regulator involved in the temporal shift from early to late pattern of mRNA expression from the adenovirus major late transcription unit. L4-33K is a virus-encoded alternative splicing factor, which enhances processing of 3’ splice sites with a weak sequence context. Here we show that L4-33K expressed from a transfected plasmid has a diffuse nuclear localization with strong enrichment in the nuclear membrane. We further show that the highly conserved part of the carboxy-terminal end of L4-33K, which functions as the splicing enhancer domain, is sufficient for nuclear localization of the protein. Interestingly, infection of the transfected cells caused a redistribution of L4-33K from the nuclear membrane into discrete ring-like structures corresponding to the viral transcription sites. We also show that serine 192 in the tiny RS repeat, which is critical for the splicing enhancer function of L4-33K, is necessary for the nuclear localization and redistribution of L4-33K protein into viral transcription sites. Collectively, our results show a good correlation between the activity of L4-33K as a splicing enhancer protein and its localization to viral transcription sites.

  • 1167016.
    Östberg, Sara
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Åsbrink, Tilda
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Välkomna till verkligheten: En studie om Försvarsmaktens möjligheter att minska soldaters benägenhet till att sluta2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Ijuli2010gickSverigefrånallmänvärnplikttillfrivilligmilitärutbildningochyrketsoldatblevenstatliganställningsform.Försvarsmaktenharidagsommålattsoldaternaskastannaimellansextillåttaår.Organisationenuppleverdockinulägetproblemmedenhögpersonalomsättningavsoldatersomväljerattslutaiförtid.SyftetmeddennastudieärattskapaendjupareförståelseförhurchefersomarbetarpåstrategisknivåinomFörsvarsmaktenuppleverproblematikenmeddenhögapersonalomsättningsområderidag,samtvilkamöjligheterdeharattminskasoldaternasbenägenhettillattsluta.StudienäravkvalitativkaraktärochgrundaspåfyrakvalitativaintervjuermedfyraolikachefersomarbetarpåstrategisknivåinomolikaavdelningarpåFörsvarsmakten.Istudienkommerviframtillattchefernaharbegränsademöjlighetertillattminskasoldaternasbenägenhettillattsluta.Dettaberorblandannatpåbegränsademöjligheteratterbjudasoldaternakarriär-­‐ochutvecklingsmöjligheter,skapaettvärdeianställningen,erbjudavarierandearbetsuppgifter,skickasoldaternapåutlandstjänstsamtbegränsademöjligheteriattlevaupptillsoldaternasförväntningarsomdefåttgenomdebilderavFörsvarsmaktensommålasuppimedia.

  • 1167017.
    Östberg, Sascha
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine.
    The Effect of Statins on the Risk of Venous Thromboembolism. A Systematic Review and Meta-analysis2014Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 1167018.
    Östberg, Sigfrid
    Stockholm University, Faculty of Humanities, Department of Oriental Languages, Korean Studies.
    Svenska Röda Korset-sjukhuset i Pusan 1950-58: En studie av den svenska insatsen med avseende på dess varierande verksamhetsfokus samt generella utveckling2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this paper is two-fold. Firstly, it is the production of a historical and chronological narrative describing the development of the Swedish Red Cross Hospital in Pusan during the years 1950-58. Secondly, it is the investigation of the objectives and aspirations of the organisations and institutions involved and how they affected how the hospital developed during the wartime years and up until the inauguration of the Scandinavian educational hospital, the National Medical Centre, in Seoul. Shortly after the outbreak of the Korean War in 1950 Sweden, a neutral nation, offered to send a contingent for the establishment of a 200 bed mobile field hospital which was to be subjected to the command of the Eighth US Army in Korea. In the end a larger semimobile evacuation hospital was set up in Pusan where both UN soldiers and PoWs were treated, and it came to be known as the Swedish Red Cross Hospital. The decrease in and finally the cessation of hostilities in 1953 opened up for treatment of Korean civilian patients and such work was conducted not only at the Swedish hospital but all over Pusan, though initially it was not formally sanctioned by American and UN authorities. Although still a part of the military system in practice it became a stationary civilian hospital in 1954. The Swedish government hoped to create some continuity between the Swedish hospital in Pusan and the Scandinavian project in Seoul and so sponsored the hospital for a few more years. Even after the main hospital closed in 1957 a Swedish paediatrics team vaccinating children for tuberculosis remained in Pusan until the opening of the National Medical Centre.

  • 1167019.
    Östberg, Sofie
    Linköping University, Department of Educational Science (IUV).
    Emma har ingen pappa!: Nio lärares berättelser om hanteringen av barn i sorg.2004Independent thesis Basic level (professional degree)Student thesis
    Abstract [sv]

    Syftet med detta examensarbete är att analysera lärares berättelser om deras hantering av barn som har varit i sorg på grund av en dödshändelse. Jag har genomfört intervjuer med nio lärare som har varit med om att ett barn i klassen eller ett barns anhörig har dött. Fyra centrala teman framträder hos dessa lärares berättelser samt vissa variationer hos dessa. De teman som kan urskiljas i lärarnas berättelser är en stark tilltro till samtal och till kunskap, vikten av att synliggöra sorgen samt vissa värden som ses som viktiga för lärarna i sorgehanteringen. Dessa värden är ärlighet, hänsynstagande,tid, lyssnande samt trygghet.

  • 1167020.
    Östberg, Tomas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Effects of organic amendments on the biodegradation of petroleum hydrocarbons in contaminated soil2006Doctoral thesis, comprehensive summary (Other academic)
  • 1167021.
    Östberg, Tomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Jonsson, Anders
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Bylund, Dan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Lundström, Ulla
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    The effects of carbon sources and micronutrients in fermented whey on the biodegradation of n-hexadecane in diesel fuel contaminated soil2007In: International Biodeterioration & Biodegradation, ISSN 0964-8305, E-ISSN 1879-0208, Vol. 60, no 4, p. 334-341Article in journal (Refereed)
    Abstract [en]

    The effect of organic amendments on the biodegradation of n-alkanes and phenanthrene in diesel contaminated soil was evaluated. The organic amendments used were fermented and non fermented sweet milk whey and the mineralization was estimated by analysis of evolved 14CO from added 14C-hexadecane, 14C-octadecane and 14C-phenanthrene. The addition of 2100 mg dry weight (dw) sweet whey kg-1 soil dw at the start of the experiment increased the extent of mineralization after 184 days compared to a control, from 45 % to 61 % for n-hexadecane and from 35 % to 46 % for n-octadecane. The stimulation was characterized according to a three-half-order kinetic such as if a greater part of the substrates was mineralized according to first order kinetics. Similar stimulation was achieved from the fermented whey when 210 mg dw kg-1 soil dw was added to the soil every second week during the 184 days of incubation.

  • 1167022.
    Östberg, Tomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Jonsson, Anders
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Lundström, Ulla
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Enhanced biodegradation of diesel fuel hydrocarbons in soil by the addition of fermented whey2005Conference paper (Other academic)
    Abstract [en]

    Industrial organic byproducts such as whey or fermented whey contain easily accessible carbon and micronutrients which could be used to stimulate microbial degradation of hazardous organic contaminants in soil. In this work we have investigated the possibility to use fermented whey as a growth supplement to enhance the aerobic degradation of diesel fuel hydrocarbons in soil. Experiments were carried out with two soils, a sand soil and a loamy sand soil, contaminated with diesel fuel at a concentration of 5000 mg kg-1 soil dry weight (dw). Fermented whey was added at different dosages to nutrient amended soil microcosms. Petroleum hydrocarbon mineralization was monitored by analysis of evolved 14CO2 from added 14C-labeled n-hexadecane. Mineralization curves were fitted to a three-half-order kinetics model. Enhanced mineralization was observed in sand soil at 7 and 22C and in loamy sand soil at 22C but the stimulatory effect was most pronounced in the sand soil at 22C, where the addition of 6 and 60 ml fermented whey kg-1 soil dw, increased the final degree of n-hexadecane mineralization from 49% in the control soil to 60 and 67% respectively. The increased total mineralization was characterized by an increase in the amount of substrate mineralized by first-order kinetics despite a decrease in the first order rate constant, k1. The highest concentration of fermented whey, 60 ml kg-1, gave rise to substrate competition, diauxie, which resulted in an extended lag phase.

  • 1167023.
    Östberg, Tomas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Jonsson, Anders
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Lundström, Ulla
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Enhanced degradation of n-hexadecane in diesel fuel contaminated soil by the addition of fermented whey2007In: Soil & sediment contamination: an international journal, ISSN 1532-0383, Vol. 16, no 2, p. 221-232Article in journal (Refereed)
    Abstract [en]

    The objective of this work has been to investigate the possibility of using fermented whey as an organic growth supplement in order to enhance the aerobic degradation of n-hexadecane in soil. Fermented whey was added at different dosages to nutrient amended soil microcosms contaminated with 5000 mg diesel fuel kg-1 dry weight (dw). The target substance was 14C-labeled n-hexadecane, and the biodegradation was monitored by analysis of evolved 14CO2. Biodegradation curves were fitted to a three-half-order kinetics model. Enhanced biodegradation was observed in sand at 7 and 22C and in loamy sand at 22C but the effect was most pronounced in the sand soil at 22C. The addition of 6 or 60 ml fermented whey kg-1 soil dw, increased the degree of n-hexadecane biodegradation at the end of the experiment, 167 days, from 49% in the untreated sand to 60 or 67% respectively. This increase in biodegradation was characterized by an increase in the amount of substrate biodegradation by first-order kinetics despite a decrease in the first order rate constant, k1. The highest concentration of fermented whey, 60 ml kg-1, gave rise to substrate competition, diauxie, which resulted in an extended lag phase.

  • 1167024.
    Östberg, Tomas L
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Jonsson, A P
    Lundström, Ulla
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Bylund, Dan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Effects of whey addition on the biodegradation of n-hexadecane, n-octadecane and phenanthrene in diesel fuel contaminated soilManuscript (preprint) (Other academic)
  • 1167025.
    Östberg, Tomas L.
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Jonsson, Anders P
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Lundström, Ulla S.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Accelerated biodegradation of n-alkanes in aqueous solution by the addition of fermented whey2006In: International Biodeterioration & Biodegradation, ISSN 0964-8305, E-ISSN 1879-0208, Vol. 57, no 3, p. 190-194Article in journal (Refereed)
    Abstract [en]

    The effect of fermented whey on the aerobic degradation of n-alkanes by a microbial consortium was investigated in an aqueous system. Microbial degradation of 100 mg n-alkanes (C12, C14, C16 and C18) in mineral nutrient medium was assessed by measuring the decrease in n-alkanes, production of CO2 and increase in biomass. The addition of fermented whey at a concentration of 5 mg dry weight to a nutrient medium receiving a small-sized inoculum (103.4 CFU ml-1)shortened the lag phase from 8 to 3 days, but the degradation rate during the degradation phase was not enhanced. The shortened lag phase at low initial concentration of microorganisms indicates that the fermented whey stimulates growth in the initial phase, without reducing the consortium's capacity for n-alkane degradation.

  • 1167026.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Swedish Language and Multilingualism, Scandinavian Languages.
    Adriaan van Dis: en skildrare av sociala orättvisor, ålderdom och död, samt Nederländernas koloniala historia2018In: Horisont (Svenska Österbottens litteraturförening), ISSN 0439-5530, no 1, p. 38-41Article in journal (Other academic)
    Abstract [sv]

    Artikeln presenterar den nederländske författaren Adriaan van Dis med utgångspunkt från hans roman "In het buitengebied" (2017). Han är en tongivande person i hemlandet, men är i stort sett okänd i Sverige. Endast två av hans böcker finns utgivna på svenska. Den senaste av dem, "Indiska sanddyner", diskuteras också i författarpresentationen.

  • 1167027.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Afrikaans - okänt språk med oviss framtid1995In: Internationella studier, ISSN 0220-952X, no 2Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    I artikeln diskuteras språket afrikaans ställning i dagens Sydafrika. Vidare behandlas dess säregna ursprung som dotterspråk till nederländskan i Europa.

  • 1167028.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Alla själars dag2006In: Horisont, ISSN 0439-5530, no 3Article in journal (Other (popular science, discussion, etc.))
  • 1167029.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Swedish Language and Multilingualism, Scandinavian Languages.
    ALMA-prisad Kuijer både roar och berör: Recension av Guus Kuijer: Florian Knol - ett alldeles vanligt kaos2013In: Svenskläraren, ISSN 0346-2412, no 2, p. 34-35Article, book review (Other (popular science, discussion, etc.))
  • 1167030.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Anne Franks dagbok: Den oavkortade originalutgåvan2010In: Historielärarnas förenings årsskrift, ISSN 0439-2434, p. 198-199Article in journal (Other (popular science, discussion, etc.))
  • 1167031.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Att sätta ansikte på samhällen: Om kanon och personmuseer2011In: Historielärarnas förenings årsskrift, ISSN 0439-2434, p. 211-213Article in journal (Other (popular science, discussion, etc.))
  • 1167032.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Swedish Language and Multilingualism, Scandinavian Languages.
    Att vara på sin mammas gata2015In: Språkbruk, ISSN 0358-9293, no 1, p. 16-20Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Artikeln behandlar idiom, vad som är typiskt för dem och hur de kan varieras; i flera fall görs jämförelser med andra språk (de nordiska, finska, engelska, tyska , franska och nederländska). Olika typer av idiom presenteras, som liknelser, ordpar, kroppsdelsidiom och djuridiom. I samtliga fall ges rikligt med exempel från svenskan och ofta även från andra språk.

  • 1167033.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Berlinmuren: Berättelser om en plats och ett tillstånd2010In: Historielärarnas förenings årsskrift, ISSN 0439-2434, p. 148-149Article in journal (Other (popular science, discussion, etc.))
  • 1167034.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Besvikelser, sjukdomar och katastrofer i novellform2002In: Nya Wermlands-Tidningen, no 4/4Article, book review (Other (popular science, discussion, etc.))
  • 1167035.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Betydelsefält i svenskan ur ett andraspråksperspektiv2012In: Språkbruk, ISSN 0358-9293, no 4, p. 14-17Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    I artikeln behandlas ordinlärning i svenskan ur ett andraspråksperspektiv och svårigheter i jämförelse med andra språk, bl.a. engelska, tyska, franska och nederländska. I första hand diskuteras ett antal betydelsefält (semantiska fält, domäner) och vissa språkspecifika drag i svenskan. Dessutom tar artikeln upp ords över- och underordning (hyponymer), synonymer och motsatser och termerna illustreras med ett stort antal exempel.

  • 1167036.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Swedish Language and Multilingualism.
    Bildkonstnären Tove Jansson: Recension av: Tuula Karjalainen: Tove Jansson. Arbeta och älska2014In: Horisont, ISSN 0439-5530, no 1, p. 53-54Article, book review (Other (popular science, discussion, etc.))
  • 1167037.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Bäst på levande svenska2007In: Svenskläraren, ISSN 0346-2412, no 2, p. 36-37Article in journal (Other (popular science, discussion, etc.))
  • 1167038.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    CMB - 1700-talets one man show2005In: Svenskläraren, ISSN 0346-2412, no 2Article in journal (Other (popular science, discussion, etc.))
  • 1167039.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    De indoeuropeiska språkens historia2008In: Språkbruk, ISSN 0358-9293, no 4Article in journal (Other (popular science, discussion, etc.))
  • 1167040.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Det hemska förflutna1998In: Nya Wermlands-Tidningen, no 9/9Article, book review (Other (popular science, discussion, etc.))
  • 1167041.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Det skenbart enkla2008In: Svenskläraren, ISSN 0346-2412, no 4, p. 32-33Article in journal (Other (popular science, discussion, etc.))
  • 1167042.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Swedish Language and Multilingualism, Scandinavian Languages.
    Därför kallas Nederländerna ofta Holland2018In: Språkbruk, ISSN 0358-9293, no 4, p. 49-51Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    I artikeln presenteras vad benämningen Nederländerna stått för i historien och vad man menar med det idag i jämförelse med Holland (och Flandern). Dessutom förklaras vad de motsvarande begreppen nederländska/holländska/flamländska står för när det gäller språk.

  • 1167043.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    En Eurydike i Falun1996In: Östgöta Correspondenten, no 30/7Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Den korta artikeln handlar om den flamländske (nederländskspråkige) författaren Hubert Lampos novell "De geliefden van Falun" (De älskande från Falun), som inte finns översatt till svenska. Novellen utspelas i Sverige, främst i Dalarna (Falun och Rättvik).

  • 1167044.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    En holländare reser i Spanien1999In: Nya Wermlands-Tidningen, no 11/12Article, book review (Other (popular science, discussion, etc.))
  • 1167045.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    En månad som nordplusstipendiat1996In: Lärar-PM till Invandrartidningen På lätt svenska, no nr 9Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Artikeln är en personlig redogörelse för arbetet som gästlärare (inom det nordiska  Nordplussamarbetet) i svenska vid Helsingfors universitet, vårterminen 1991.

  • 1167046.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    En nederländsk deckare utan ett brott2003In: Nya Wermlands-Tidningen, no 9/4Article, book review (Other (popular science, discussion, etc.))
  • 1167047.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Swedish Language and Multilingualism, Scandinavian Languages.
    En nyckel till Nootebooms författarskap. Cees Nooteboom: En sång om sken och vara2015In: Horisont, ISSN 0439-5530, no 2, p. 48-49Article, book review (Other academic)
  • 1167048.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Engelska lånord i svenskan2010In: Språkbruk, ISSN 0358-9293, no 3, p. 30-31Article in journal (Other (popular science, discussion, etc.))
  • 1167049.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Engelskan i vår tekopp2010In: Svenskläraren, ISSN 0346-2412, no 4, p. 36-37Article in journal (Other (popular science, discussion, etc.))
  • 1167050.
    Östberg, Urban
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Ett träd med vida grenar2009In: Historielärarnas förenings årsskrift, ISSN 0439-2434, p. 151-153Article in journal (Other (popular science, discussion, etc.))
23338233392334023341233422334323344 1167001 - 1167050 of 1180065
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