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  • Pehrsson, Anne
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Languages, Department of Scandinavian Languages.
    Sjuka och anhöriga: En undersökning om hur depression framställs i krönikor2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Jag har genomfört en textanalys av 12 krönikor från 2013-2016 som handlar om depression. Syftet med undersökningen var att undersöka hur depression framställs i krönikor idag beroende på om skribenten har erfarenhet av sjukdomen från ett inifrån- eller utifrånperspektiv. Jag har tagit avstamp i den systemisk-funktionella grammatiken och undersökt teman, attityder och värderingar, närhet och distans, identitetsskapande samt deltagarroller.

    Resultaten från undersökningen visar att det skiljer i framställningen av depression beroende på om skribenten har egen erfarenhet eller erfarenhet som anhörig inom alla de områden jag valde att undersöka. Både sjukdomstillstånd och människor framställs som aktiva och passiva beroende på skribentens erfarenhet, de med egen erfarenhet skapar mer närhet till läsaren och en starkare identitet med den egna gruppen och båda grupperna har en negativ attityd till sjukdomen depression men olika om andra sjukdomsdrag samt människor. 

  • Gramin, Ava
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
    Analysis of Calibration and Surface Contamination on the Rosetta Langmuir Probe Instrument2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • Widén, Johan
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
    Eriksson, Britt-Marie
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Infectious Diseases.
    Ronne-Engström, Elisabeth
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery.
    Enblad, Per
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery.
    Westman, Gabriel
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Infectious Diseases.
    Ventriculostomy-related infections in subarachnoid hemorrhage patients - a retrospective study of incidence, etiology, and antimicrobial therapy2017In: Acta Neurochirurgica, ISSN 0001-6268, E-ISSN 0942-0940, Vol. 159, no 2, 317-323 p.Article in journal (Refereed)
    Abstract [en]

    This study was performed to investigate the incidence and etiology of ventriculostomy-related infections (VRIs) in patients with subarachnoid hemorrhage (SAH) and to assess adherence to local clinical guidelines regarding empirical antimicrobial therapy and diagnostic routines. A total of 191 consecutive SAH patients treated in the neuro-intensive care unit of Uppsala University Hospital between 2010 and 2013 were included retrospectively. Information regarding cerebrospinal fluid samples, bacterial cultures, ventriculostomy treatment, patient characteristics, and antibiotic treatment were collected from electronic patient records. Eleven patients developed VRI, resulting in an incidence of 5.8% per patient, 5.4% per ventriculostomy catheter, and 4.1 per 1000 catheter days. Coagulase-negative staphylococci caused nine cases of VRI and Klebsiella pneumoniae and Staphylococcus aureus caused one each. Empirical VRI therapy was initiated on 97 occasions in 81 subjects (42.4%). Out of the 11 patients with VRI, four did not receive empirical antibiotic therapy before the positive culture result. The clinical actions performed after analysis of CSF samples were in line with the action suggested by the local guidelines in 307 out of 592 cases (51.9%). The incidence of VRI in our cohort was comparable to what has previously been reported. Coagulase-negative staphylococci was the most common agent. Our study demonstrates the difficulty in diagnosing VRI in SAH patients. Improved adherence to clinical guidelines could to some extent reduce the use of empirical antibiotic treatment, but better diagnostic methods and routines are needed.

  • Henriksson, Dorcus Kiwanuka
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Women's and Children's Health, International Maternal and Child Health (IMCH). Karolinska Inst, Stockholm, Sweden.
    Ayebare, Florence
    Makerere Univ, Sch Publ Hlth, Coll Hlth Sci, Kampala, Uganda..
    Waiswa, Peter
    Karolinska Inst, Stockholm, Sweden.;Makerere Univ, Sch Publ Hlth, Coll Hlth Sci, Kampala, Uganda..
    Peterson, Stefan Swartling
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Women's and Children's Health, International Maternal and Child Health (IMCH). Makerere Univ, Sch Publ Hlth, Coll Hlth Sci, Kampala, Uganda..
    Tumushabe, Elly K.
    Mukono Dist Local Govt, Mukono, Uganda..
    Fredriksson, Mio
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Health Services Research.
    Enablers and barriers to evidence based planning in the district health system in Uganda; perceptions of district health managers2017In: BMC Health Services Research, ISSN 1472-6963, E-ISSN 1472-6963, Vol. 17, 103Article in journal (Refereed)
    Abstract [en]

    Background: The District Health System was endorsed as the key strategy to achieve 'Health for all' during the WHO organized inter-regional meeting in Harare in 1987. Many expectations were put upon the district health system, including planning. Although planning should be evidence based to prioritize activities, in Uganda it has been described as occurring more by chance than by choice. The role of planning is entrusted to the district health managers with support from the Ministry of Health and other stakeholders, but there is limited knowledge on the district health manager's capacity to carry out evidence-based planning. The aim of this study was to determine the barriers and enablers to evidence-based planning at the district level.

    Methods: This qualitative study collected data through key informant interviews with district managers from two purposefully selected districts in Uganda that have been implementing evidence-based planning. A deductive process of thematic analysis was used to classify responses within themes.

    Results: There were considerable differences between the districts in regard to the barriers and enablers for evidence-based planning. Variations could be attributed to specific contextual and environmental differences such as human resource levels, date of establishment of the district, funding and the sociopolitical environment. The perceived lack of local decision space coupled with the perception that the politicians had all the power while having limited knowledge on evidence-based planning was considered an important barrier.

    Conclusion: There is a need to review the mandate of the district managers to make decisions in the planning process and the range of decision space available within the district health system. Given the important role elected officials play in a decentralized system a concerted effort should be made to increase their knowledge on evidence-based planning and the district health system as a whole.

  • Clausen, Fredrik
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery.
    Hansson, Hans-Arne
    Univ Gothenburg, Inst Biomed, Gothenburg, Sweden..
    Raud, Johan
    Lantmannen AS Faktor AB, Stockholm, Sweden..
    Marklund, Niklas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery.
    Intranasal Administration of the Antisecretory Peptide AF-16 Reduces Edema and Improves Cognitive Function Following Diffuse Traumatic Brain Injury in the Rat2017In: Frontiers in Neurology, ISSN 1664-2295, E-ISSN 1664-2295, Vol. 8, 39Article in journal (Refereed)
    Abstract [en]

    A synthetic peptide with antisecretory activity, antisecretory factor (AF)-16, improves injury-related deficits in water and ion transport and decreases intracranial pressure after experimental cold lesion injury and encephalitis although its role in traumatic brain injury (TBI) is unknown. AF-16 or an inactive reference peptide was administrated intranasally 30 min following midline fluid percussion injury (mFPI; n = 52), a model of diffuse mild-moderate TBI in rats. Sham-injured (n = 14) or naive (n = 24) animals were used as controls. The rats survived for either 48 h or 15 days post-injury. At 48 h, the animals were tested in the Morris water maze (MWM) for memory function and their brains analyzed for cerebral edema. Here, mFPI-induced brain edema compared to sham or naive controls that was significantly reduced by AF-16 treatment (p < 0.05) although MWM performance was not altered. In the 15-day survival groups, the MWM learning and memory abilities as well as histological changes were analyzed. AF-16-treated brain-injured animals shortened both MWM latency and swim path in the learning trials (p < 0.05) and improved probe trial performance compared to brain-injured controls treated with the inactive reference peptide. A modest decrease by AF-16 on TBI-induced changes in hippocampal glial acidic fibrillary protein (GFAP) staining (p = 0.11) was observed. AF-16 treatment did not alter any other immunohistochemical analyses (degenerating neurons, beta-amyloid precursor protein (beta-APP), and Olig2). In conclusion, intranasal AF-16-attenuated brain edema and enhanced visuospatial learning and memory following diffuse TBI in the rat. Intranasal administration early post-injury of a promising neuroprotective substance offers a novel treatment approach for TBI.

  • Cocco, Arianna
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Rönnberg, A. M. Carolina
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Jin, Zhe
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    André, Goncalo Igreja
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience. Univ Western Australia, Ctr Evolutionary Biol, 35 Stirling Hwy, Crawley, WA 6009, Australia..
    Vossen, Laura E.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Bhandage, Amol K.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Thörnqvist, Per-Ove
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Birnir, Bryndis
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Winberg, Svante
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
    Characterization of the gamma-aminobutyric acid signaling system in the zebrafish (danio rerio hamilton) central nervous system by reverse transcription-quantitative polymerase chain reaction2017In: Neuroscience, ISSN 0306-4522, E-ISSN 1873-7544, Vol. 343, 300-321 p.Article in journal (Refereed)
    Abstract [en]

    In the vertebrate brain, inhibition is largely mediated by raminobutyric acid (GABA). This neurotransmitter comprises a signaling machinery of GABA(A), GABA(B) receptors, transporters, glutamate decarboxylases (gads) and 4-aminobutyrate aminotransferase (abat), and associated proteins. Chloride is intimately related to GABAA receptor conductance, GABA uptake, and GADs activity. The response of target neurons to GABA stimuli is shaped by chloride-cation co-transporters (CCCs), which strictly control Cl- gradient across plasma membranes. This research profiled the expression of forty genes involved in GABA signaling in the zebrafish (Danio rerio) brain, grouped brain regions and retinas. Primer pairs were developed for reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The mRNA levels of the zebrafish GABA system share similarities with that of mammals, and confirm previous studies in non-mammalian species. Proposed GABAA receptors are alpha(1)beta(2)gamma(2), alpha(1)beta(2)delta, alpha(2b)beta(3), alpha(2b)beta(3)delta, alpha(4)beta(2)gamma(2), alpha(4)beta(2)gamma, alpha(6b)beta(2)gamma(2) and alpha(6b)beta(2)delta. Regional brain differences were documented. Retinal hetero- or homomeric rho-composed GABAA receptors could exist, accompanying alpha(1)beta(y)gamma(2), alpha(1)beta(y)delta, alpha(6a)beta(y)gamma(2,) alpha(6a)beta(y)delta. Expression patterns of alpha(6a) and alpha(6b) were opposite, with the former being more abundant in retinas, the latter in brains. Given the stoichiometry alpha(6w)beta(y)gamma(z), alpha(6a-) or alpha(6b)-containing receptors likely have different regulatory mechanisms. Different gene isoforms could originate after the rounds of genome duplication during teleost evolution. This research depicts that one isoform is generally more abundantly expressed than the other. Such observations also apply to GABAB receptors, GABA transporters, GABA-related enzymes, CCCs and GABAA receptor associated proteins, whose presence further strengthens the proof of a GABA system in zebrafish.

  • Ghide Habtetsion Gebremichael, Ghide
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Archaeology and Ancient History. 2.
    The History and Di scourse of Kachung Forest2016Independent thesis Advanced level (degree of Master (One Year)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    This study examined the history of the Kachung forest plantation in northern Uganda and associated environmental discourses. The forest, a project aimed at environmental protection and carbon offsetting, was designated a forest reserve in 1939 by the colonial government, as part of wider efforts to promote Ugandan timber for export and ensure their regeneration as a renewable resource. Since then, Kachung forest has been attributed different environmental significance by various actors, such as by the Uganda Forest Department, the Norwegian Agency for Development and Cooperation (NORAD), the Norwegian Afforestation Group (NAG) and presently by the Norwegian-based Green Resources company (GRAS). Between 1939 and 2006, the forest reserve underwent only limited changes in terms of management and composition. More radical change began in 2006, when GRAS started largescale tree planting. In 2012, Kachung Forest was certified as a Clean Development Mechanism (CDM) project in accordance with the Kyoto Protocol. Since then, people living in and around the forest have been prevented from using forest resources for their livelihoods. They have expressed resistance to this by encroachment, setting fires in the forest and mounting angry protests against GRAS. One possible reason for this resistance is that afforestation took place with little prior knowledge of the forest’s history and value for local communities. The present analysis of the history of the forest and the associated environmental discourse throughout the 20th century was conducted using empirical data collected through interviews and from forest records, aerial photographs and GIS maps. Actor-Network Theory (ANT) was used as a theoretical framework to examine how the different actors are connected and their role in shaping the landscape. The study focused on four key areas: the status of Kachung Forest when the commercial forestry project began, evidence of recent environmental degradation, its location, and how the discourse about Kachung Forest was shaped by a broader environmental discourse about East Africa. The data showed that all external factors involved in past and ongoing afforestation processes had little knowledge of the longer-term human and land use history of the forest, and often repeated ambitions by the former colonial government. Interviews with local communities living close to Kachung and other empirical material revealed that the area maintained its savannah woodland and tropical high forest nature until 1996, and since late 2000 the vegetation and land use system changed very significantly. Encroachment by local communities was identified as arising from lack of land for hunting, grazing, cultivation and cultural activities and lack of access to water. Thus successful afforestation can only be achieved with prior knowledge of land use history and by consulting local communities. Empowering the local community’s traditional environmental conservation practices could be a better way than CDM for tackling the wider environmental crisis. Keywords: Actor-Network Theory, GIS, CDM, Africa tropical forest, human settlement, land use history. Master’s thesis in Global Environmental History (60 credits), supervisors: Anneli Ekblom and Paul Lane, defended and approved autumn term 2016 © Ghide Habtetsion Gebremichael Department of Archaeology and Ancient History, Uppsala University, Box 626, 75126 Uppsala, Sweden

  • Rooth, Esther
    et al.
    Umeå Universitet.
    Olinder, Anna Lindholm
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical diabetology and metabolism.
    Nurses’ experiences of giving care to children with autism spectrum disorder within somatic emergency care2016In: Scientific Times Journal of Paediatrics, Vol. 1, no 1, 1-11 p.Article in journal (Refereed)
    Abstract [en]

    Aims: To describe nurses’ experiences of giving care to children with autism spectrum disorder in a paediatric emergency care unit and to explore how the nurses had obtained their knowledge of the subject.

    Background: Within somatic paediatric care, nurses frequently encounter children with autism spectrum disorder. Many parents of these children report a lack of knowledge about the diagnosis and difficulties in encounters with somatic care. According to Patricia Benner’s theory of learning, a skill is developed through education, tutoring and experience.

    Design: A qualitative interview study. 

    Method: Semi-structured interviews were held with ten nurses during the spring of 2015. Data was analysed by content analysis to find categories and codes corresponding to the study’s aims.

    Findings: The findings present information regarding: 1) knowledge and experience; 2) the context in which the child finds itself, as well as an unsafe working environment for the nurses; 3) how the treatment and care of the child, among other things, is affected by information given by the parents about the diagnosis, and how the nurses feel in difficult situations; 4) interaction with the children, the parents and colleagues. The findings in this study mainly show the complexity in encounters with children with autism spectrum disorder and their parents and that nurses require further education. The nurses also give a number of suggestions for improvements that well concur with the literature.

    Conclusion: To be able to care well for children with autism spectrum disorder, a combination of knowledge and experience is necessary.

  • Kallioinen, Petter
    et al.
    Olofsson, Jonas
    Nakeva von Mentzer, Cecilia
    Department of Behavioral Sciences and Learning, Swedish Institute for Disability Research, Linkoping University, Linkoping, Sweden.
    Lindgren, Magnus
    Ors, Marianne
    Sahlén, Birgitta
    Lyxell, Björn
    Engström, Elisabet
    Uhlén, Inger
    Semantic Processing in Deaf and Hard-of-Hearing Children: Large N400 Mismatch Effects in Brain Responses, Despite Poor Semantic Ability2016In: Frontiers in Psychology, ISSN 1664-1078, E-ISSN 1664-1078, Vol. 7, 1146Article in journal (Refereed)
  • Håstad, Martin
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
    Exploration and evaluation of different sessionization methods in a music streaming context2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Sessionization is a powerful method to create aggregated data used to understanduser behavior in the field of data mining. A lot of research has been performed overthe years and most of it is geared towards traditional web servers. How the resultstranslate to a context with a stand alone application with a service that has veryspecific usage pattern has not been fully investigated. In this project we investigatedhow the currently utilized heuristics perform on identifying a session in a musicstreaming context and introduce some additional measures to summarize such sessions.

  • Hollmann, Christopher
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
    Coding of Guiding Data for VideoTranscoding2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In today’s and tomorrow’s internet traffic videos play an increasingly larger role. Thisis true for both live transmissions like video conferences, and videos stored oninternet platforms which the users can access at any time, the so-called Video onDemand (VoD). This thesis focusses on the latter case. Here the provider has severaloptions how to make the content available. Possibilities are for example simulcast,transcoding, or guided transcoding. While each of them has advantages, there are alsodrawbacks. These canbe storage requirements, computational complexity, or a loss of quality.A different approach named deflation tries to minimize the drawbacks by using lessstorage than simulcast, being not as computationally expensive as transcoding, andproviding a higher quality than guided transcoding. The first step is to estimate thetransform coefficients based on the encoded version of the original video, which isdecoded and downsized to the wanted resolution. Deflation then calculates thedifference between the estimated and original transform coefficients, which arecreated by encoding the original video at the required resolution. These coefficientscontain the actual picture data. Theyare then written into the bit stream, along with the control data containinginformation like prediction mode or how the picture is divided into Transform Blocks(TBs). In the inverse operation called inflation these details are parsed from the bitstream andthe delta is added to the estimated coefficients, recreating the original values.However, since the deflation uses the identical encoding methods as the most recentvideo encoding standard HEVC, there is potential for improvement as the encodercan be optimizedfor deflation and its special cases and coefficient layout. After a thorough analysis todetermine the layout of these delta-coefficients several new syntax elements wereadded and existing ones modified.These changes were evaluated in various configurations. A key difference to theoriginal scheme is the usage of knowledge gained from the estimated coefficients,which can be applied due to correlations between positions and magnitudes of bothcoefficient groups. The introduced changes reduce the storage requirements fordeflated files by between 1.5 and 3 percentage points compared to the originaldeflation scheme, with the exact values depending on the configuration and settings ofthe representation. While there are still many options to improve the deflationscheme, the additions made and described in this thesis proved to be quite successful.

  • Kominos, Charalampos Gavriil
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
    Performance analysis of differentvirtualization architectures using OpenStack2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Cloud computing is a modern model for having on demand access to a pool ofconfigurable resources like CPU, storage etc. Despite its relative youth however, it has already changed the face of present-day IT. The ability to request computing power presents a whole new list of opportunities and challenges. Virtual machines, containers and bare-metal machines are the three possible computing resources which a cloud user can ask from a cloud provider.

    In the context of this master thesis, we will discuss and benchmark these three different deployment methods for a private OpenStack cloud. We will compare and contrast these systems in terms of CPU, networking behavior, disk I/O and RAM performance in order to determine the performance deterioration of each subsystem. We will also try to empirically determine if private clouds based on containers and physical machines are viable alternatives to the traditional VM based scenario.To achieve these goals, a number of software suites have been selected to act as benchmarks with the aim of stressing their respective subsystem. The output of these benchmarks is collected and the results are compared against each other. Finally, the different types of overhead which take place between these three types are discussed.

  • Söderberg, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
    Anomalous Dimensions in the WF O(N) Model with a Monodromy Line Defect2017Student paper other, 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    General ideas in the conformal bootstrap program are covered. Both numerical and analytical approaches to the bootstrap equation are reviewed to show how it can be manipulated in different ways. Further analytical approaches are studied for theories with defects. We consider the three-dimensional CFT at the corresponding WF fixed point in the O(N) \phi^4 model with a co-dimension two, monodromy defect. Anomalous dimensions for bulk- and defect-local fields as well as one of the OPE coefficients are found to the first loop order. Implications of inserting this defect and constraints that arises from symmetries of the theory are investigated.

  • Ritzman, Amanda
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Literature, Rhetoric.
    Lasswell online: En studie av traditionella kommunikationsmodellers användbarhet på Facebook2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det är ett välkänt faktum att vi idag står inför många stora miljökriser. Även om dessa miljökatastrofer ibland används för att diskutera konsekvenserna för människan så finns det organisationer som har vänt på situationen och visar konsekvenserna för natur och miljö. En av dessa är WWF - en organisation som är både framgångsrika och intressanta i sin marknadsföring på Facebook. De driver en stark fråga i ett medium som inte är så välutforskat ännu och gör det med bravur - men hur går detta till? För att ta reda på detta används Harold Lasswells och D.C Barnlunds kommunkationsmodeller och syftet med uppsatsen är att undersöka hur moderna sociala medier och deras interaktiva natur fungerar i relation till äldre kommunikationsmodeller, alltså mer specifikt Lasswells linjära modell och Barnlunds  transaktiva, för att analysera deras användbarhet i en internetbaserad miljö.

  • Tan, Jun Liang
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Development of a pitch based wake optimisation control strategy to improve total farm power production2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this thesis, the effect of pitch based optimisation was explored for a 80 turbine wind farm. Using a modified Jensen wake model and the Particle Swarm Optimisation (PSO) model, a pitch optimisation strategy was created for the dominant turbulence and atmospheric condition for the wind farm.

    As the wake model was based on the FLORIS model developed by P.M.O Gebraad et. al., the wake and power model was compared with the FLORIS model and a -0.090% difference was found. To determine the dynamic predictive capability of the wake model, measurement values across a 10 minute period for a 19 wind turbine array were used and the wake model under predicted the power production by 17.55%. Despite its poor dynamic predictive capability, the wake model was shown to accurately match the AEP production of the wind farm when compared to a CFD simulation done in FarmFlow and only gave a 3.10% over-prediction.

    When the optimisation model was applied with 150 iterations and particles, the AEP production of the wind farm increased by 0.1052%, proving that the pitch optimisation method works for the examined wind farm. When the iterations and particles used for the optimisation was increased to 250, the power improvement between optimised results improved by 0.1144% at a 222.5% increase in computational time, suggesting that the solution has yet to fully converge. While the solutions did not fully converge, they converged sufficiently and an increase in iterations gave diminishing results. From the results, the pitch optimisation model was found to give a significant increase in power production, especially in wake intensive wind directions. However, the dynamic predictive capabilities will have be improved upon before the control strategy can be applied to an operational wind farm.

  • Werner, David
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Vattenfall AB.
    Quantifying the Shadow Effect between Offshore Wind Farms with Idealized Mesoscale Models and Observed Wind Data2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Two post processing methods for quantifying the shadow effect of the offshore wind farm Princes Amalia (PA) onto Egmond aan Zee (OWEZ) wind farm are analyzed and benchmarked. The first method is the author’s proposed shadow effect determination method (SEDM), which quantifies an offshore wind farm’s shadow effect based on mesoscale WRF (Weather Research Forecast) idealized modeling and the observed frequency of the analyzed site’s wind conditions. The Fitch turbine parametrization scheme and Mellor-Yamada-Nakanishi-Niino (MYNN) surface layer and planetary boundary layer (PBL) schemes were used to simulate the wind farm’s interactions, based on site conditions.

    The proposed physical downscaling method (SEDM) uses filtered simulated atmospheric stability and wind speed conditions, in order to calculate the percent wind speed deficit downstream of PA, with regard, first, to observed wind speed frequency and, secondly, to wind speed and corresponding atmospheric stability regimes. Then a statistical downscaling method, based on the established Analog Ensemble (AnEn) technique, developed by Luca Delle Monache et al. (2011) was employed to verify the results from the first method. This method runs a post processing algorithm using the weighted average of the observations that were verified when the 15 best analogs were valid.

    Observed wind speed data at 10 m and 50 m height was used as Numerical Weather Prediction (NWP) input data and fit to observed time series data. From this, wind speeds at 116 m were extrapolated, in order to estimate the reconstructed atmospheric stability. The two methods were benchmarked and shadow effects were quantified in the range of 7.53% - 22.92% for the SEDM and within an 80% confidence interval of 0.23% -1.83% for the statistical downscaling method. Given the physical method’s exceedance of this confidence interval, WRF idealized modeling proves itself as a consistent means of quantifying an offshore wind farm’s wake, as demonstrated by comparable studies, however inaccurate when benchmarked to statistical modelling methods that use observed wind speed data to recreate atmospheric conditions.

  • Alavanja, Bojan
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Application of SCADA Data Monitoring Methodology and Reliability Analysis of Wind Farm Operational Data2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Reliability of wind turbine components and maintenance optimisation are among the critical aspects of wind power development closely related to profitability and future development. The main reason for research in these areas is lowering the cost of energy production for wind power, specifically important in offshore environment. Continuous monitoring of specific wind turbine components can be valuable for wind farm operators and, subsequently, wind farm owners.  Also, health assessment of critical components can be useful in estimating the possibilities for life extension of wind turbines. Expensive Condition Monitoring Systems (CMSs) are not always available, particularly in older wind farms, and additionally installing CMSs on wind turbines is not always economically feasible. However, most of modern wind turbines are equipped with the Supervisory Control And Data Acquisition (SCADA) system which is recording 10-minute average values of parameters that depict operation of the turbine. That being said, SCADA data contains a vast amount of information that can be used for analysis of wind turbine components health. Therefore, this project will present an application of previously published methodology for SCADA data condition monitoring on real wind farm data. The goal of this project is to investigate on the possibilities of the SCADA monitoring methodology and what can be the added value of the application for wind farm operators, owners and other stakeholders.

    The methodology for condition monitoring through SCADA data was applied on real data gathered from two wind farms in Germany and one in the Netherlands. During the project the methodology had to be modified in order to ensure the best possible industrial application. Results of the project showed that the SCADA data condition monitoring approach is not capable of predicting failures. However, the technique has been proven successful for detecting the changes of trends in dependencies of working parameters, specifically monitoring parameters related to the turbine generators. Continuously monitoring the dependencies of working parameters can be used as an additional source of information for maintenance scheduling and assessment of components health. The approach presented in this paper can be valuable to asset managers and wind farm owners.

  • Kollwitz, Jochanan
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Defining the Wake Decay Constant as a Function of Turbulence Intensity to Model Wake Losses in Onshore Wind Farms2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Modelling the wake effect generated by wind turbines is an essential part for calcu- lating a wind farm’s expected energy production. Operating wind turbines disturb the flow of the wind, which results in decreased production of downwind turbines. The N. O. Jensen model is an industry standard wake model that assumes a linear expansion of the downstream wake. The only adjustable parameter in the model is the wake decay constant (WDC), which has traditionally been derived semi em- pirically from terrain surface roughness. However, the WDC defines the expansion rate of the generated wake, and therefore can be linked to the ambient turbulence intensity (TI): high ambient turbulence leads to a faster decay of the generated wake, and therefore to lower wake losses, and vice-versa. Since the influence of the roughness on the ambient turbulence intensity is expected to be less significant at higher heights, these roughness-based WDC values are rather uncertain for the hub heights employed nowadays.

    The following study presents the results of a comparison between observed and mod- elled wake losses based on different WDC values. To investigate how a change in height affects the wake modelling, two wake scenarios occurring between two tur- bine sets with different hub heights are selected from an operational wind farm. By modelling the wakes using roughness as well as turbulence intensity-based WDCs, conclusions can be drawn on how the predictive capability of the N.O. Jensen model depends on the selection of a suitable WDC value.

    Finally it is concluded that the goodness of fit between modelled and observed wake losses shows a clear dependency on the wind speed/power production inter- val. At higher wind speeds, the TI-based WDC resulted in a better accuracy of the modelled wake losses as compared to the roughness-based WDC, while for lower wind speeds the N. O. Jensen model performed most accurately when using WDC = 0.075. However, for the investigated cases the overall accuracy of the modelled wake appears to be higher when choosing WDC = 0.075 instead of a TI-based WDC. 

  • da Silva Soares, José Pedro
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    WIND ENERGY UTILIZATION IN ARCTIC CLIMATE – RACMO 2.3 GREENLAND CLIMATE RUNS PROJECT2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The potential for wind power development in Greenland is evaluated based on the analysis of 58 years of data (1957-2015) from RACMO 2.3 (Regional Atmospheric Climate Model). In order to create a wind power development tool, mesoscale maps based on RACMO 2.3 model were created containing the following characteristics: mean wind speeds (at 10 m), averaged maximum wind speed (with and without gusts at 10 m), temperature, humidity, geopotential, ice sheet mask and land sheet mask. A relevant aspect for this thesis is the mean wind speed. Over Greenland, the lower mean wind speeds range from 2-3 m/s on the tundra areas near the coast. This is influenced by high temperature inversion over the arctic tundra which disintegrates the predominant katabatic flow leading to lower wind speeds. On the other hand, the highest mean wind speeds range from 6 to 10 m/s and are observed in the northeastern region, due to cyclonic activity over the Greenland Sea. Maps of both the mean wind speed and averaged maximum wind speed are combined in order to achieve the highest mean wind speed value while at the same time avoiding maximum wind speeds higher than the cut-off value of the selected turbine model. This map combination is synchronized with pre-determined construction constraints, resulting in the suggestion of three different sites (sites 4, 5 and 6) as potential targets for wind power development. Multi-level data is sorted for different heights (10, 35, 70, 100 and 120 m) to perform a micro-scale analysis exercise for the three different site suggestions. A Vestas V90 3MW with an 80 meter hub height is selected as the standard turbine model to be deployed at the three recommended positions and for use in further simulations using WindSim. Annual Energy Production (AEP) for these three turbines in the recommended locations is calculated based on the interpolation from the climatology data at 70 m which is closest to the turbines’ hub heights. The AEP results are compared and show that site suggestion 4 presents the best potential for wind power development, surpassing by 79% and 23% the production results from sites 5 and 6, respectively. Based on the study developed, it is concluded that the in terms of wind resource assessment the potential for wind power development in Greenland exists. However the selection of possible deployment sites should be carefully done and real measurements must be performed.

  • Krasowski, Piotr
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
    Troha, Douglas
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
    Wireless system design: NB-IoT downlink simulator2017Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The newly defined NB-IoT standard currently lacks a toolkit and simulator. In order to develop algorithms for this new standard there is a need for channels and signals as reference during tests. MATLAB is commonly used for testing LTE signals and therefore the toolkit was developed in this environment. The toolkit focuses primarily on the Layer 1-relevant functionality of NB-IoT, the grid generation, encoding, rate-matching and modulation of channels. The simulator focuses on testing the developed toolkit in a virtual LTE NB-IoT environment. The virtual environment attempts to emulate a base station and a terminal. The path followed is scheduling, channel processing, grid generation, QPSK and OFDM modulation through a modeled channel, OFDM demodulation, channel estimation, equalisation, QPSK demodulation and reversal of channel processing. The simulator tests primarily the NPDSCH channel implementations. Measurements of bit error and block error rates were made and it was concluded that they follow the expected trends. More testing is required to validate the remaining channels. A sector equaliser and an interpolating equaliser were tested by measuring block error rate and checking constellation diagrams and it was concluded that the performance of the interpolation equaliser is more consistent. In order to improve the equalisation further the noise estimation must be reworked.

  • Frisk, Malin
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Simulation and Optimization of a Hybrid Renewable Energy System for application on a Cuban farm2017Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This paper presents an analysis of the feasibility of utilizing a hybrid renewable energy system to supply the energy demand of a milk and meat farm in Cuba. The study performs simulation and optimization to obtain a system design of a hybrid renewable energy system for application on the farm Desembarco del Granma in the Villa Clara province in the central part of Cuba, for three different cases of biomass availability. The energy resources considered are solar PV, biogas, and wind. A field study is carried out to evaluate the energy load and the biomass resource available for biogas production of the farm Desembarco del Granma, and the feasibility of biogas electrification is evaluated for the three different scenarios of biomass availability. The field study methodology includes semi structured interviews and participant observation for information collection.

    The farm Desembrero del Granma is estimated to have a scaled annual average electrical load of 264 kWh/day with peak load 26.34 kW, while the scaled annual average deferrable load of the farm was estimated to be 76 kWh/day with a peak load 16 kW. The thermal load was find to consist primarily of energy for water heating and cooking. The thermal demand for cooking was estimate to be 4.5 kWh per day, while the thermal load for water heating was not estimated. The thermal energy need for water heating is assumed to be provided for by solar thermal energy, and is not included in the energy system models of this study. For the modeling, the thermal demand for cooking is assumed to be provided by combustion of biogas.

    System simulation and optimization in regard to energy efficiency, economic viability and environmental impact is carried out by applying the Hybrid Optimization Model for Electric Renewables (HOMER) simulation and optimization software tool. For two of the biomass scenarios, the optimized energy systems received in HOMER were identical; hence only two biomass scenarios were analyzed. The first one represents the current biomass collected and the biogas production capacity of the farm (including the one not yet utilized), and the second one represents the amount of biomass available if the animals would be gathered in the same place all of the time. A PV-wind hybrid energy system with 100 kW PV installed capacity, 30 kW wind power installed capacity consisting of 10 wind turbines of the size 3 kW, a battery bank of 100 batteries (83.4 Ah/24 V), and a 100 kW inverter is considered the most feasible solution for the current biomass scenario. For the increased biomass scenario, a PV-biogas hybrid energy system configuration of 5 kW PV installed capacity, a 60 kW biogas generator, and an inverter of the size 10 kW is considered the most feasible option. Biogas electrification is shown to not be economically feasible for the current biomass scenario during the conditions modeled in this study, but for the increased biomass scenario biogas electrification was shown to be a feasible option. If the farm would build more biodigestors, biogas electrification could thereby be effective from a financial point of view.

  • Danhard, Malin
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Educational Sciences, Department of Education.
    Ponti Nyberg, Evelina
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Educational Sciences, Department of Education.
    Kampen om uppmärksamheten: En observationsstudie om det gemensamma talutrymmets fördelning i grundskolans lägre åldrar2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • Herschend, Frands
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Archaeology and Ancient History.
    Selaöns runinskrifter: en runstensgeografi2017In: Fornvännen, ISSN 0015-7813, E-ISSN 1404-9430, Vol. 112, no 1, 10-23 p.Article in journal (Refereed)
    Abstract [en]

    This is a study of a small runestone material from the Selaön Island in Lake Mälaren. As an island material, the inscriptions are set apart from their surroundings. They link in with common traits among decorated 11th runestones, but also with the characteristic breadth of middle-sized and well-defined materials. This local diversity may nevertheless be seen as a characteristic in itself of the larger Lake Mälaren area: this region is partly built from local nodes united by the lake. Based on the study three research fields are identified: 1) small-scale runestone geography and chronology, 2) the non-banal and complex relationship between design, text and ornament, 3) a dimension of intent characteristic of Selaön, that is, a local sincerity in the commemorative inscriptions. Micro-geography, complex design and mindset are thus suggested as new fields for a cognitively more rewarding contextual research into the runestone vogue in the Lake Mälaren area.

  • Engström Johansson, Alexandra
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Using Bulk XRF-Analysis of Chinese Loess to Determine High-Resolution Records of Dust Provenance2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Understanding the sources of the dust that forms the extensive loess deposits on the Chinese Loess Plateau is crucial for reconstructing atmospheric circulation patterns and dust pathways. Dust sources are however highly debated, mainly due to the low resolution of many records and the often ambiguous nature of geochemical proxies. The widely used concept of elemental ratios as provenance indicators is based on the idea that the relative abundance of immobile elements remains unaffected by chemical weathering, thereby preserving source signals. High-resolution spatial and temporal records of loess composition were determined for two study sites and three lithostratigraphic units using bulk X-ray fluorescence (XRF) analysis, and independently dated using Optically Stimulated (OSL) and post-IR Infrared Stimulated (pIR-IRSL) Luminescence dating. Four elemental ratios were chosen based on element properties of mobility and grain size, linear correlation strength and the existence of lithostratigraphic trends: Ti/Al, Si/Al, K/Al and Fe/Ti. Potential source signals were detected at both sites, at glacial-interglacial transitions as well as within lithostratigraphic units. Source changes detected within lithostratigraphic units show millennial-scale variability, indicating that abrupt shifts in dust provenance are possible. This implies that millennial-scale variability of the East Asian Monsoon may be related to changes in atmospheric dust content.

  • Bonestroo, Jelle
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    CEO incentive-based compensation, investment opportunities and institutional heterogeneity2017Independent thesis Advanced level (degree of Master (One Year)), 20 HE creditsStudent thesis
    Abstract [en]

    Using international data (15,786 obs.) from industrial companies from 28 countries over an 11-year period (2003–2014), this research contributes to the area of institutional heterogeneity, CEO compensation and investment opportunities. More precisely, we use three perspectives in order to investigate whether investment opportunities explain CEO compensation structures. We compare (i) U.S. and non-U.S. firms, (ii) Common law and Civil law firms, and (iii) firms operating with similar cultural characteristics. Overall, after controlling for firm governance and board characteristics, we find that investment and growth opportunities in terms of book-to-market ratio, research and development (R&D), and capital expenditures (CAPEX) explain the percentage equity and non-salary CEO compensation. These findings suggest that firms with higher information asymmetries associated with their growth opportunities pay CEOs higher incentive-based compensation.

  • Jansson, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Results from Geant4 calculations of energy deposition from gamma- and neutron radiation emitted from selected cases of used boiling water reactor nuclear fuel assemblies in a KBS-3 type deep geological repository2017Data set
    Abstract [en]

    Monte Carlo calculations, using the Geant4 framework version 10.02, of energy deposition from gamma- and neutron radiation emitted from boiling water reator (BWR) fuel assemblies in a KBS-3 type deep geological repository for used nuclear fuel have been performed. This dataset contains the results of the calculations. Three fuel rods were arbitrarily selected as source rods for 662 keV and 2.75 MeV gamma- and neutron radiation, respectively. For each of the six cases, the energy deposited in a 3-dimensional (x,y,z) mesh with 1 cm resolution was calculated and tallied as function of the type of particle that deposited the energy.

  • Bäckman, Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Defining an Earthquake Intensity Based Method for a Rapid Earthquake Classification System2017Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    Ground motions caused by earthquakes may be strong enough to cause destruction of infrastructure and possibly casualties. If such past destructive earthquakes are analysed, the gained information could be used to develop earthquake warning systems that predicts and possibly reduce the damage potential of further earthquakes. The Swedish National Seismic Network (SNSN) runs an automated early warning system that attempts to predict the damage of an earthquake that just got recorded, and forward the predictions to relevant government agencies. The predictions are based on, e.g. earthquake magnitude, source depth and an estimate of the size of affected human population. The purpose of this thesis is to introduce an additional parameter: earthquake intensity, which is a measure of the intensity with which the ground shakes. Based on this, a new earthquake hazard scheme, the Intensity Based Earthquake Classification (IBEC) scheme, is created. This scheme suggests alternate methods, relative to SNSN, of how earthquake classifications can be made. These methods will use an intensity database established by modelling scenario earthquakes in the open-source software ShakeMap by the U.S. Geological Survey. The database consists of scenarios on the intervals: 4.0 ≤ Mw ≤ 9.0 and 10 ≤ depth ≤ 150 kilometre, and covers the whole intensity scale, Modified Mercalli Intensity, 1.0 ≤ Imm ≤ 10.0. The IBEC classification scheme also enabled the creation of the 'Population-to-Area' criterion. It improves prediction of earthquakes that struck isolated cities, located in e.g. valleys in large mountainous areas and deserts. Even though such earthquakes are relatively uncommon, once they occur, they may cause great damage as many cities in such regions around the world often are less developed regarding resistance to ground motions.

  • Sporre, Olivia
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Government.
    The role of storytelling within deliberation: A narrative and qualitative content analysis of a citizen dialogue concerning vulnerable EU-citizens begging in Uppsala, Sweden2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis studies the role of storytelling within deliberation. It examines a citizen dialogue concerning the issue of vulnerable EU-citizens begging in Uppsala, Sweden, held in March 2016. Storytelling has been the focus of a normative debate with arguments both for and against its role in deliberation. However, within empirical research, stories’ role within deliberative discussions has not gained equal attention. In this thesis some of the findings of existing empirical research are tested in a Swedish context, as are some of the assumptions of the normative debate. The study examines whether stories are told and if they have an effect to the extent that they are further engaged in the discussions. It furthermore studies what type of effects stories may be seen to have on deliberation, whether widening and/or limiting. In relation to prior research, the definition of a story is discussed and clarified for this study. The findings show that stories are shared in deliberation and engage other deliberators, thus having an effect on the discussions. The nuanced findings concerning stories’ potential widening and/or limiting effects on deliberation are reported on and discussed in relation to prior empirical and theoretical research. Parts of these results are that the concept of unconventional claims is problematized, and that a tendency of stories creating “experts” in deliberation is identified.

  • Wahlqvist, Gustav
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Persson, Daniel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Räntekänslighet: En studie om sambandet mellan reporäntan och aktiekursen, samt skuldsättningsgradens påverkan2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I ett flertal tidigare studier har samband mellan penningpolitik och aktiemarknaden studerats. Resultaten av dessa har varit tvetydiga och de flesta har gjorts i andra länder än Sverige. I den här uppsatsen studeras sambandet mellan ändringar av reporäntan och aktieindexet OMXS60 på Stockholmsbörsen för att se om det finns ett samband mellan dessa. Utöver detta studeras hur företags kapitalstruktur kan ha en påverkan på det nyss nämnda sambandet, det vill säga om det finns en räntekänslighet kopplat till kapitalstrukturen. Syftet med denna uppsats grundar sig i Modigliani och Millers teorem från 1958. Teoremet beskriver bland annat att avkastningskravet på eget kapital ökar proportionellt med skuldsättningsgraden och att ett företag med hög skuldsättningsgrad påverkas mer av förändringar i skuldräntan än ett företag med låg skuldsättningsgrad. För att undersöka detta användes en regressionsanalys för att analysera finansiell data mellan åren 2006 till och med 2015. Tre dagar kring annonseringen av reporäntans ändring var föremål för analys: dagen innan annonseringsdagen, annonseringsdagen och dagen efter annonseringsdagen. Det resultat som framgick av undersökningen var att det fanns ett signifikant negativt samband mellan reporäntan och aktiekursen dagen innan samt på annonseringsdagen för reporäntan. Det framgick även att kapitalstrukturen påverkade styrkan på det tidigare nämnda sambandet, dock endast dagen innan annonseringen.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of the t(t)over-bar production cross-section using e mu events with b-tagged jets in pp collisions at root s=13 TeV with the ATLAS detector2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, 136-157 p.Article in journal (Refereed)
    Abstract [en]

    his paper describes a measurement of the inclusive top quark pair production cross-section (sigma(t (t) over bar)) with a data sample of 3.2 fb(-1) of proton-proton collisions at a centre-of-mass energy of root s = 13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron-muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously sigma(t (t) over bar) and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: s(t (t) over bar)= 818 +/- 8 (stat) +/- 27 (syst) +/- 19 (lumi) +/- 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of the total cross section from elastic scattering in pp collisions at root s=8 TeV with the ATLAS detector2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, 158-178 p.Article in journal (Refereed)
    Abstract [en]

    A measurement of the total ppcross section at the LHC at root s = 8TeV is presented. An integrated luminosity of 500 mu b(-1) was accumulated in a special run with high-beta* beam optics to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable t. The measurement is performed with the ALFA sub-detector of ATLAS. Using a fit to the differential elastic cross section in the -t range from 0.014 GeV2 to 0.1 GeV2 to extrapolate t -> 0, the total cross section, sigma(tot)( pp -> X), is measured via the optical theorem to be sigma(tot)(pp -> X) = 96.07 +/- 0.18 (stat.) +/- 0.85 (exp.) +/- 0.31 (extr.) mb, where the first error is statistical, the second accounts for all experimental systematic uncertainties and the last is related to uncertainties in the extrapolation t -> 0. In addition, the slope of the exponential function describing the elastic cross section at small t is determined to be B = 19.74 +/- 0.05 (stat.) +/- 0.23 (syst.) GeV-2.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of the top quark mass in the t(t)over-bar -> dilepton channel from root s=8TeVATLAS data2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, 350-371 p.Article in journal (Refereed)
    Abstract [en]

    A search has been made for supersymmetry in a final state containing two photons and missing transverse momentum using the ATLAS detector at the Large Hadron Collider. The search makes use of 3.2 fb−1 of proton-proton collision data collected at a centre-of-mass energy of 13 TeV in 2015. Using a combination of data-driven and Monte-Carlo-based approaches, the Standard Model background is estimated to be 0.27+0.22−0.10 events. No events are observed in the signal region; considering the expected background and its uncertainty, this observation implies a model-independent 95 % CL upper limit of 0.93 fb (3.0 events) on the visible cross section due to physics beyond the Standard Model. In the context of a generalized model of gauge-mediated supersymmetry breaking with a bino-like next-to-lightest supersymmetric particle, this leads to a lower limit of 1650 GeV on the mass of a degenerate octet of gluino states, independent of the mass of the lighter bino-like neutralino.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Search for high-mass new phenomena in the dilepton final state using proton-proton collisions at root s=13 TeV with the ATLAS detector2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, 372-392 p.Article in journal (Refereed)
    Abstract [en]

    A search is conducted for both resonant and non-resonant high-mass new phenomena in dielectron and dimuon final states. The search uses View the MathML source3.2fb−1 of proton–proton collision data, collected at View the MathML sources=13TeV by the ATLAS experiment at the LHC in 2015. The dilepton invariant mass is used as the discriminating variable. No significant deviation from the Standard Model prediction is observed; therefore limits are set on the signal model parameters of interest at 95% credibility level. Upper limits are set on the cross-section times branching ratio for resonances decaying to dileptons, and the limits are converted into lower limits on the resonance mass, ranging between 2.74 TeV and 3.36 TeV, depending on the model. Lower limits on the ℓℓqqℓℓqq contact interaction scale are set between 16.7 TeV and 25.2 TeV, also depending on the model.

  • Friström, Christina
    Svensk litteraturhistorisk bibliografi 99-100 (1980-1981)1983In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, Vol. 104, 1-54 p.Article, review/survey (Other academic)
  • Andersson, Henrik
    et al.
    Öhman, May-Britt
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Centre for Gender Research.
    Var dag en kamp för skogssamisk framtid: Ett (drygt) år med Henrik Andersson,renskötare i Gällivare skogssameby2017In: Uppsala mitt i Sápmi – Sábme – Saepmie II.: En supradisciplinär antologi härrörande från vårsymposium organiserat av Uppsam –Föreningen for samiskrelaterad forskning i Uppsala, Uppsala universitet, 28–29 april 2014 / [ed] May-Britt Öhman, Cecilia Hedlund, Gunilla Larsson, Uppsala: Uppsam - föreningen för samiskrelaterad forskning i Uppsala , 2017, 51-62 p.Chapter in book (Refereed)
    Abstract [en]

    Every day struggles for Forest Sámi futures: A year with Henrik Andersson, reindeer herder in GällivareForest Sámi villageAt the UPPSAM spring symposium 2014 Henrik Andersson, reindeer herder in Gällivare Forest Sámi village(sameby), participated and presented along with film maker Petri Storlöpare the documentary “The LastGeneration?”. The film follows Henrik during a year 2012–2013, when he decided to live according to oldertradition. Henrik Andersson is besides working for the maintaining of Forest Sámi tradition and handicraftalso a frequent writer on Facebook and he is actively pursuing different issues of importance for the preservationof Sámi lands and waters for current reindeer herding and for future generations. May-Britt Öhmanhas with the approval of Henrik selected among his many Facebook updates over a year, starting fromJuly 7, 2014 until September 4, 2015. [facebook.com/henrik.andersson.982] The content in the updates isall from every day reflections, happy moments, to critique against the destructive exploitations of Sámi landsand waters. One recurrent theme is the struggle to safeguard reindeer grazing, calving and migration landsagainst wind power exploitations, at the moment pursued by the company Vasavind and also the state powercompany Vattenfall, on the lands of Gällivare forest Sámi village. The updates are most of the time written oncellphone and some smaller editing has been made for enhanced legibility. However, most of the text is thesame version as is available on Henrik’s open Facebook wall. The updates follows Facebook chronology,meaning that the latest are the first.

  • Nøland, Jonas Kristiansen
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
    Børsteløs magnetisering gir bedre nettstabilitet2016In: Energiteknikk : fagbladet for energibransjen, no 6, 50-51 p.Article in journal (Other (popular science, discussion, etc.))
    Abstract [no]

    Børsteløse magne seringsutrustninger kom på 1950-tallet etter er utviklingen av kompakte høyeffekts silisium- dioder. I prinsippet bygde man en forvrengt synkronmaskin og puttet den på samme akslingen som synkrongeneratoren. Feltviklingen på denne maskinen lå i stator, mens den trefasede armaturviklingen ble satt i rotor. En roterende diodebro paå akslingen knyttet magnetiseringsmaskinen sammen med generatorens feltvikling.Den trege responsen l den børsteløse magnetiseringsutrustningen er hovedårsaken l at den ikke slo igjennom tross redusert vedlikehold av magnetiseringssystemet. Paå 1980-tallet forsøkte man å bygge en magnetiseringsmaskin med lave induktanser for å gjøre responsen like rask som statiske magnetiseringsutrustninger. Denne artikkelen viser til at den roterende diodebroen kan byttes ut med en thyristorbro på akslingen, og dermed forbedre stegresponsen. I tillegg har systemet fordeler i forhold til magnetiserinssystemets evne til å motstå spenningsdipper på nett, derav FRT-kapabilitet. En sammenligning med statisk system blir gjort.

  • Pahkamaa, Tobias
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economic History.
    Svagår i Piteå landsförsamling1862-18722017Student paper second term, 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    I denna uppsats undersöks den demografiska utvecklingen i Piteå landsförsamling under åren 1862-1872. Detta för att få en kunskap om hur den ekonomiska krisen 1867-1868 påverkade folkmängd, födelsetal, dödstal och giftermålsfrekvens. Vidare undersöks hur olika socialgrupper påverkades med avseende på mortalitet och giftermålsfrekvens. Resultatet av undersökningen är att ekonomiska faktorer påverkar demografiska faktorer och att lägre socialgrupper tvingas anpassa sig i högre utsträckning.

  • Mengütay, Sibel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economic History.
    Tankarna kring kriminalvårdens utredningar om fångarnas arbete under år 1892: En undersökning av motiv, tankar och uttryck angående föreskrifter inom fångvården2017Student paper second term, 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    The aim of this study is to show how the thoughts have been motivated for the cell penalties extension. The new law which came through 1892 meant more isolation for the prisoners. Before this law the government priority meant much more work penalty but after the law which came through 1892 meant work penalty after three years of isolation. My main conclusion of this study is that the government priority was that the work should be equally as the extension of the isolation. The law texts showed that the isolation penalty was a way to rehabilitate the prisoners so that they would be ”good” corporate citizens and for them to achieve this result the government meant that they needed isolation so that the prisoners could rehabilitate, be raised and then could get a work after the release.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Pelikan, Daniel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Study of the rare decays of B-s(0) and B-0 into muon pairs from data collected during the LHC Run 1 with the ATLAS detector2016In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 76, no 9, 513Article in journal (Refereed)
    Abstract [en]

    A study of the decays B-s(0) -> mu(+)mu(-) and B-0 -> mu(+)mu(-) has been performed using data corresponding to an integrated luminosity of 25 fb(-1) of 7 and 8 TeV proton-proton collisions collected with the ATLAS detector during the LHC Run 1. For the B-0 dimuon decay, an upper limit on the branching fraction is set at B(B-0 -> mu(+)mu(-)) < 4.2 x 10(-10) at 95% confidence level. For B-s(0), the branching fraction B(B-s(0) -> mu(+)mu(-)) = (0.9(-0.8)(+1.1)) x 10(-9) is measured. The results are consistent with the Standard Model expectation with a p value of 4.8%, corresponding to 2.0 standard deviations.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P. O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Pelikan, Daniel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Dark matter interpretations of ATLAS searches for the electroweak production of supersymmetric particles in s√=8 TeV proton-proton collisions2016In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 9, 175Article in journal (Refereed)
    Abstract [en]

    A selection of searches by the ATLAS experiment at the LHC for the electroweak production of SUSY particles are used to study their impact on the constraints on dark matter candidates. The searches use 20 fb−1 of proton-proton collision data at s√=8 TeV. A likelihood-driven scan of a five-dimensional effective model focusing on the gaugino-higgsino and Higgs sector of the phenomenological minimal supersymmetric Standard Model is performed. This scan uses data from direct dark matter detection experiments, the relic dark matter density and precision flavour physics results. Further constraints from the ATLAS Higgs mass measurement and SUSY searches at LEP are also applied. A subset of models selected from this scan are used to assess the impact of the selected ATLAS searches in this five-dimensional parameter space. These ATLAS searches substantially impact those models for which the mass m(χ~01) of the lightest neutralino is less than 65 GeV, excluding 86% of such models. The searches have limited impact on models with larger m(χ~01) due to either heavy electroweakinos or compressed mass spectra where the mass splittings between the produced particles and the lightest supersymmetric particle is small.

  • Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Search for supersymmetry in a final state containing two photons and missing transverse momentum in root s=13 TeV pp collisions at the LHC using the ATLAS detector2016In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 76, no 9, 517Article in journal (Refereed)
    Abstract [en]

    A search has been made for supersymmetry in a final state containing two photons and missing transverse momentum using the ATLAS detector at the Large Hadron Collider. The search makes use of 3.2 fb−1 of proton-proton collision data collected at a centre-of-mass energy of 13 TeV in 2015. Using a combination of data-driven and Monte-Carlo-based approaches, the Standard Model background is estimated to be 0.27+0.22−0.10 events. No events are observed in the signal region; considering the expected background and its uncertainty, this observation implies a model-independent 95 % CL upper limit of 0.93 fb (3.0 events) on the visible cross section due to physics beyond the Standard Model. In the context of a generalized model of gauge-mediated supersymmetry breaking with a bino-like next-to-lightest supersymmetric particle, this leads to a lower limit of 1650 GeV on the mass of a degenerate octet of gluino states, independent of the mass of the lighter bino-like neutralino.

  • Aad, G.
    et al.
    Bergeaas Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P. O. Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ohman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Pelikan, Daniel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camila
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of the double-differential high-mass Drell-Yan cross section in pp collisions at root s=8 TeV with the ATLAS detector2016In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 8, 009Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of the double-differential cross section for the Drell-Yan Z/γ∗ → ℓ+ℓ− and photon-induced γγ → ℓ+ℓ− processes where ℓ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, mℓℓ, between 116 GeV and 1500 GeV using a sample of 20.3 fb−1 of pp collisions data at centre-of-mass energy of s√=8 TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of mℓℓ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1% is achieved at low mℓℓ. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated.

  • Naqvi, S. Rabab
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Hussain, T.
    Univ Queensland, Australian Inst Bioengn & Nanotechnol, Ctr Theoret & Computat Mol Sci, Brisbane, Qld 4072, Australia..
    Panigrahi, P.
    Hindustan Univ, Ctr Clean Energy & Nano Convergence CENCON, Madras, Tamil Nadu, India..
    Luo, Wei
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Ahuja, Rajeev
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Royal Inst Technol KTH, Dept Mat & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden..
    Manipulating energy storage characteristics of ultrathin boron carbide monolayer under varied scandium doping2017In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 7, no 14, 8598-8605 p.Article in journal (Refereed)
    Abstract [en]

    We report, for the first time we believe, a detailed investigation on hydrogen storage efficiency of scandium (Sc) decorated boron carbide (BC3) sheets using spin-polarized density functional theory (DFT). We analyzed the energetics of Sc adsorption and explored the most favorable adsorption sites of Sc on BC3 sheets with 3.12%, 6.25%, and 12.5% coverage effects. Our investigations revealed that Sc strongly binds on pristine BC3 sheet, with a minimum binding energy of similar to 5 eV, which is robust enough to hinder Sc-Sc metal clustering. Sc, the lightest transition metal, adsorbs a large number of H-2 molecules per atom, resulting in a reasonable storage capacity. With 12.5% Sc-coverage, functionalized BC3 sheets could attain a H2 storage capacity of 5.5 wt% with binding energies suitable for a practical H-2 storage medium.

  • Behera, Nilamani
    et al.
    Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India..
    Kumar, Ankit
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India..
    Chaudhary, Sujeet
    Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India..
    Pandya, Dinesh K.
    Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India..
    Two magnon scattering and anti-damping behavior in a two-dimensional epitaxial TiN/Py(t(Py))/beta-Ta(t(Ta)) system2017In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 7, no 14, 8106-8117 p.Article in journal (Refereed)
    Abstract [en]

    The prime requirements for the spin transfer torque based ferromagnetic (FM)/nonmagnetic (NM) bilayer spin devices are (i) the absence of two-magnon scattering (TMS) noise, (ii) minimum energy dissipation and (iii) fast switching. To realize these objectives we have studied the thickness, Py (permalloy) thicknesses (t(Py)) and beta-Ta thicknesses (t(Ta)), dependent magnetization dynamics behaviour of the epitaxial Py (t(Py) = 3-20 nm)/beta-Ta (t(Ta) = 1.5-15 nm) system. The t(Py) dependence of TMS in epitaxial Py nanolayers (t(Py) = 3-20 nm) grown on a Si(400)/TiN(200) (8 nm) substrate is explored in terms of uniform and non-uniform magnetization precession regimes by employing ferromagnetic resonance field (H-r), linewidth (Delta H), and Gilbert damping constant (alpha) behaviour. It is found that in Py, t(Py) < 10 nm, layers TMS is dominating due to non-uniform precession of the magnetization. However in Py, t(Py) >= 10 nm, layers the uniform magnetization precession dominates, therefore Py layers, t(Py) >= 10 nm, are almost free from TMS. Furthermore, a nearly TMS free 12 nm epitaxial Py(200) layer is capped with beta-Ta (t(Ta) = 1.5-15 nm) layers to explore the t(Ta) dependent magnetization precession of epitaxial Py (12 nm) in terms of change in effective Gilbert damping constant (alpha(eff)). An anomalous decrease in alpha(eff) from 0.0087 at t(Ta) = 0 to a minimum value of 0.0077 at t(Ta) = 6 nm, and its subsequent increase for t(Ta) > 6 nm are observed in the epitaxial Py (12 nm)/beta-Ta(t(Ta)) system. Therefore the Si(400)/TiN(200) (8 nm)/Py(200) (12 nm)/beta-Ta(200) (6 nm) epitaxial system with nearly uniform magnetic precession and minimum effective Gilbert damping is suitable for low energy loss and ultrafast switching applications in spin transfer torque devices.

  • Öhman, May-Britt
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Centre for Gender Research. Samelands fria universitet.
    Kolonisationen, rasismen och intergenerationella trauman: Analys, reflektioner och förslag utifrån ett skriande behov av samiskLEDD forskning och undervisning2017In: Uppsala mitt i Sápmi – Sábme – Saepmie II: En supradisciplinär antologi härrörande från vårsymposium organiserat av Uppsam –Föreningen for samiskrelaterad forskning i Uppsala, Uppsala universitet, 28–29 april 2014 / [ed] May-Britt Öhman, Cecilia Hedlund, Gunilla Larsson, Uppsala: Uppsam - föreningen för samiskrelaterad forskning i Uppsala , 2017, 99-113 p.Chapter in book (Refereed)
    Abstract [en]

    In this article I argue that there is a desperate need of Sámi LED research and education. I discuss Swedenand Swedish academia from a decolonial perspective. The question regarding Sámi representationin academia – in research and education – or rather the void of representation and its consequences isdiscussed along with the colonial scientific paradigm of continued exploitation. The article ends with a sketchof a Manifesto for Sámi related and Sámi led research. The article is based on my own experiences andconversations with others in Swedish and international academia, Indigenous scholars and activists, as wellas interviews and conversations from 2004 and until today. Methodological and theoretical approaches aretaken from Indigenous Methodologies/Theories/Studies, Feminist Technoscience and a historical researchtradition called “ego-histoire”.

  • Public defence: 2017-04-07 13:00 Geijersalen, Engelska parken Hus 6, Uppsala
    Aronsson, August
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of History.
    Löfte, tvist och försoning: Politikens spelregler i 1300-talets Norden2017Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This thesis aims to explain how politics in 14th century Scandinavia were structured by a set of rules or norms of conduct – rules which were neither codified nor enforced by any outside agency, yet had a very real impact on the patterns by which political action was conducted. Taking inspiration from historical anthropology, the study sets out to analyze the ways in which political tensions and relationships, primarily within the royal elite, were negotiated in various situations. The source material – mainly letters of treaties, but also contemporary literary sources – are treated as remains of political communication within a common discursive framework.

    The findings of the study go against some established notions about politics in the 14th century that are prevalent in current Scandinavian research. On the whole, patterns of political behaviour during the period show great similarities to those of the earlier Middle Ages, despite the discontinuity implied by the idea of the 13th century as the era of "state formation" in Scandinavia. Rather, the kings and princes of the 14th century appear to have been ruled by quite similar norms of behaviour to those of their predecessors, albeit on a more complex scale.

    The concepts of peace and justice are shown to have been central to the way that political action was legitimized. No functional difference can be shown to have been made between "feudal" or personal relations, and those of the state. Peace was conceived as a state of harmony, which could only be achieved through the establishment of mutual positive bonds, and an active striving for justice. The latter was achieved, both with the aid of mediators and negotiators, and through the demonstration of force, in patterns largely similar to the practice of feuding. Likewise, acts of supplication and reconciliation are shown to have played an active part in the way that political relations were reified during the process of ending an armed conflict.

  • Sahlen, Anders
    et al.
    Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden.;Karolinska Univ Hosp, Dept Cardiol, Stockholm, Sweden.;Natl Heart Ctr Singapore, 5 Hosp Dr, Singapore 169609, Singapore..
    Varenhorst, Christoph
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, UCR-Uppsala Clinical Research Center. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiology.
    Lagerqvist, Bo
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiology. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, UCR-Uppsala Clinical Research Center.
    Renlund, Henrik
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, UCR-Uppsala Clinical Research Center.
    Omerovic, Elmir
    Univ Gothenburg, Sahlgrenska Acad, Gothenburg, Sweden..
    Erlinge, David
    Lund Univ, Clin Sci, Dept Cardiol, Lund, Sweden..
    Wallentin, Lars
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiology. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, UCR-Uppsala Clinical Research Center.
    James, Stefan K.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiology. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, UCR-Uppsala Clinical Research Center.
    Jernberg, Tomas
    Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden.;Karolinska Univ Hosp, Dept Cardiol, Stockholm, Sweden..
    Outcomes in patients treated with ticagrelor or clopidogrel after acute myocardial infarction: experiences from SWEDEHEART registry2016In: European Heart Journal, ISSN 0195-668X, E-ISSN 1522-9645, Vol. 37, no 44, 3335-3342 p.Article in journal (Refereed)
    Abstract [en]

    Aims Ticagrelor reduces ischaemic events and mortality in acute coronary syndrome (ACS) vs. clopidogrel. We wished to study clinical outcomes in a large real-world population post-ACS. Methods and results We performed a prospective cohort study in 45 073 ACS patients enrolled into SwedishWeb system for Enhancement and Development of Evidence-based care in Heart Disease Evaluated According to Recommended Therapies who were discharged on ticagrelor (N = 11 954) or clopidogrel (N = 33 119) between 1 January 2010 and 31 December 2013. The primary outcome was a composite of all-cause death, re-admission with myocardial infarction (MI) or stroke, secondary outcomes as the individual components of the primary outcome, and re-admission with bleeding. The risk of the primary outcome with ticagrelor vs. clopidogrel was 11.7 vs. 22.3% (adjusted hazard ratio (HR) 0.85 [95% confidence interval: 0.78-0.93]), risk of death 5.8 vs. 12.9% (adjusted HR 0.83 [0.75-0.92]), and risk of MI 6.1 vs. 10.8% (adjusted HR 0.89 [0.78-1.01]) at 24 months. Re-admission with bleeding with ticagrelor vs. clopidogrel occurred in 5.5 vs. 5.2% (adjusted HR 1.20 [1.04-1.40]). In a subset of patients undergoing percutaneous coronary intervention (PCI) on ticagrelor vs. clopidogrel the PCI-related in-hospital bleeding was 3.7 vs. 2.7% (adjusted odds ratio, OR, 1.57 [1.30-1.90]). Conclusion Ticagrelor vs. clopidogrel post-ACS was associated with a lower risk of death, MI, or stroke, as well as death alone. Risk of bleeding was higher with ticagrelor. These real-world outcomes are consistent with randomized trial results.

  • Melander, Erik
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Eriksson, Camilla
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy.
    Jansson, Britt
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Göransson, Ulf
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy.
    Hammarlund-Udenaes, Margareta
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Improved method for quantitative analysis of the cyclotide kalata B1 in plasma and brain homogenate2016In: Biopolymers, ISSN 0006-3525, E-ISSN 1097-0282, Vol. 106, no 6, 910-916 p.Article in journal (Refereed)
    Abstract [en]

    This study provides a new method for quantifying the cyclotide kalata B1 in both plasma and brain homogenate. Cyclotides are ultra-stable peptides with three disulfide bonds that are interesting from a drug development perspective as they can be used as scaffolds. In this study we describe a new validated LC-MS/MS method with high sensitivity and specificity for kalata B1. The limit of quantification was 2 ng/mL in plasma and 5 ng/gmL in brain homogenate. The method was linear in the range 2-10,000 ng/mL for plasma and 5-2000 ng/g for brain. Liquid Chromatographic separation was performed on a HyPurity C18 column, 50 3 4.6 mm, 3 mm particle size. The method had inter-and intra-day precision and accuracy levels <15% and 12% respectively. Applying the method to in vivo plasma samples and brain homogenate samples from equilibrium dialysis yielded satisfying results and was able to describe the plasma pharmacokinetics and brain tissue binding of kalata B1. The described method is quick, reproducible and well suited to quantifying kalata B1 in biological matrices.

  • Public defence: 2017-04-07 10:15 Ihresalen, Engelska parken. Humanistiskt centrum, Uppsala
    Backman, Agnieszka
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Languages, Department of Scandinavian Languages.
    Handskriftens materialitet: Studier i den fornsvenska samlingshandskriften Fru Elins bok (Codex Holmiensis D 3)2017Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This dissertation contains a study of the multitext manuscript Codex Holmiensis D 3 based in Material Philology and its focus on the material conditions underlying manuscripts. The aim of the investigation is to describe D 3 in order to increase understanding of its material conditions including content and circumstance of copying, as well as its use and purpose. 

    D 3 contains 14 text works in different genres, for example romances, chronicles, and edifying works. The paper manuscript in the format of a holster book has been dated through its watermarks to around 1487/1488. It was written for the noblewoman Elin Gustavsdotter (Sture).

    An older manuscript, Codex Holmiensis D 4a, has previously been identified as the exemplar of D 3. These manuscripts are very similar as regards language and content. However, it is shown here that D 4a could not have been the model for D 3 in the case of the romance Flores och Blanzeflor; nor can the manuscript as a whole be a copy of D 4a.

    There are few traces of use in D 3, but the first work, Herr Ivan Lejonriddaren, has several concluding texts before its final closing. These concluding texts suggest that parts of the work were being read while the rest was being copied. There are also dual quire signatures in this work, implying that the quires were in disarray, possibly because they were in use when the signatures were added.

    The purpose of D 3 was to educate and provide examples of good and bad behaviour for the nobility. Moreover, there is an owner-epilogue which also stresses courtly ideals and can be linked to the concept of exemplary behaviour. The contents can also be ordered thematically, with first a Carolingian connection, followed by one connected with Ireland and finally one focused on the Christian community. Codicological breaks divide the manuscript into two parts, which leads to the assumption of at least two common exemplars for D 3 and D 4a.

    An emphasis on the materiality of the manuscript reveals it to be not so much an unwieldy collection of unrelated text witnesses as a book created for a certain person and her time.

  • Public defence: 2017-04-07 09:15 Friessalen, Uppsala
    Marklund, Maria H. K.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology. School of Biological Sciences and The Environment Institute, University of Adelaide, North Terrace, SA 5005, Australia.
    The influence of trophic polymorphisms on habitat coupling in aquatic food webs2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Trophic cascades, together with other indirect interactions are important aspects in shaping the composition and abundance of species in the food web. Theoretically, movement of energy between systems, and coupling between habitats by mobile predators have been suggested as being important for food web stability and evenness. Individual diet specialisations have been shown to be widespread in many animal taxa. Although not widely studied, some studies have indicated that mobile predators that display individual specialisations, may have a reduced ability to couple habitats.

    In this thesis, by using field studies and an experimental study, my aim was to assess the individual specialisation displayed by Eurasian perch (Perca fluviatilis) and its influence on the ability of the perch to couple habitats. In the experiment, we also investigated the effect of habitat coupling, or the lack of habitat coupling, on the dynamics and stability of the resources in the ecosystem.

    We show that habitat diversity and resource availability influenced perch individual specialisation and morphological variation. We found that the perch total niche width decreased with decreasing habitat switching ability. We demonstrate asymmetrical habitat coupling ability in perch across pelagic and littoral habitats, providing evidence that not all individuals within a species respond in the same way when it comes to spatial coupling and thereby providing stability within a food web.

    Our results expand on previous work and suggest that habitat coupling ability can influence individual specialisations and niche width. Furthermore, we show the importance of individual specialisations in relation to habitat coupling. Finally, we provide evidence for the theory that a food web dominated by a food specialist should exhibit more variable resource dynamics than a food web dominated by a generalist predator by showing a greater indirect effect of predation on the phytoplankton levels when no habitat coupling occurs. While many models and theoretical concepts have proposed a stabilising effect of cross movement of energy and mobile predators, little empirical evidence exists that confirms this mechanism.

    In conclusion, my thesis gives some support for the theoretical predictions that habitats coupled by a generalist predator should be more stable.

    List of papers
    1. The influence of habitat accessibility on the dietary and morphological specialisation of an aquatic top predator
    Open this publication in new window or tab >>The influence of habitat accessibility on the dietary and morphological specialisation of an aquatic top predator
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    (English)Manuscript (preprint) (Other academic)
    National Category
    Ecology
    Identifiers
    urn:nbn:se:uu:diva-315718 (URN)
    Available from: 2017-02-20 Created: 2017-02-20 Last updated: 2017-02-20
    2. Habitat coupling mediates trophic cascades in an aquatic community
    Open this publication in new window or tab >>Habitat coupling mediates trophic cascades in an aquatic community
    (English)Manuscript (preprint) (Other academic)
    National Category
    Ecology
    Identifiers
    urn:nbn:se:uu:diva-315717 (URN)
    Available from: 2017-02-20 Created: 2017-02-20 Last updated: 2017-02-20
    3. Combining resource use assessment techniques reveals trade-offs in trophic specialization of polymorphic perch
    Open this publication in new window or tab >>Combining resource use assessment techniques reveals trade-offs in trophic specialization of polymorphic perch
    2016 (English)In: Ecosphere, ISSN 2150-8925, E-ISSN 2150-8925, Vol. 7, no 8, e01387Article in journal (Refereed) Published
    Abstract [en]

    Trophic polymorphism has found to be common in many taxa and is a suggested mechanism of ecological speciation. To characterize the trophic linkages of specific morphotypes of organisms as well as a time-integrated niche use, several methods are available. In this study, we present data of multiple techniques to investigate the trophic divergence of Eurasian perch (Perca fluviatilis) that displays well-studied trophic polymorphism associated with littoral and pelagic habitats in lakes. We combined bulk stable isotope and fatty acid analyses on the muscle tissue of perch from three different lakes in Sweden with analyses of stomach content. By comparing the three methods, we aimed at providing a broad and highly resolved picture on the trophic divergence in freshwater fish. The degree in morphological divergence varied between perch caught in the three different lakes. Generally, perch caught in the pelagic zone were more streamlined compared to the ones caught in the littoral zone that had a deeper body, as shown by geometric morphometrics. The three diet assessment methods revealed different levels of information. Data on stomach content showed some preferences for specific dietary items in littoral and pelagic perch, but general trophic specialization could not be concluded due to the small sample size. Analyses of delta C-13 and delta N-15, however, confirmed these results as a long-term pattern connected to specific habitat use in two of the three lakes. Fatty acid signatures of perch reflected partly those of the prey items of the specific habitats. Although the proportions of the essential fatty acid 22:6n-3 were lower in littoral resources, the proportions in littoral fish were similar to the ones caught in the pelagic zone. We concluded that although a fundamental contribution from littoral resources exists in littoral phenotypes, a minor reliance on pelagic prey items is obviously needed to provide essential compounds. Thus, by combining the methods to characterize direct resource use (i.e., stomach analyses) with others that utilize trophic biomarkers (i.e., analyses of stable isotopes and fatty acids), we were able to illustrate the degree of variation in trophic divergence of perch but also shed some light on potential trade-offs that are related to resource specialization in freshwater fish.

    Keyword
    carbon stable isotopes; ecological speciation; fatty acid analysis; geometric morphometrics; Perca fluviatilis; resource polymorphism; Special Feature; Biomarkers in Trophic Ecology; stomach content analysis
    National Category
    Ecology
    Identifiers
    urn:nbn:se:uu:diva-264657 (URN)10.1002/ecs2.1387 (DOI)000387208900001 ()
    Available from: 2015-10-15 Created: 2015-10-15 Last updated: 2017-02-20Bibliographically approved
    4. Asymmetrical habitat coupling of a top predator
    Open this publication in new window or tab >>Asymmetrical habitat coupling of a top predator
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    (English)Manuscript (preprint) (Other academic)
    National Category
    Ecology
    Identifiers
    urn:nbn:se:uu:diva-315719 (URN)
    Available from: 2017-02-20 Created: 2017-02-20 Last updated: 2017-02-20