Avancerad sökning

Hittade 5 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Charged particle distributions and robustness of the neural network pixel clustering in ATLAS

    Författare :Edvin Sidebo; Jonas Strandberg; Bengt Lund-Jensen; David Silvermyr; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; p p: scattering; ATLAS; LHC; charged particle: multiplicity; semiconductor detector: pixel; neural network: performance; track data analysis: cluster; charged particle: cluster; splitting; CERN LHC Coll; Fysik; Physics;

    Sammanfattning : This thesis contains a study of the robustness of the artificial neural network used in the ATLAS track reconstruction algorithm as a tool to recover tracks in dense environments. Different variations, motivated by potential discrepancies between data and simulation, are performed to the neural network’s input while monitoring the corresponding change in the output. LÄS MER

  3. 2. Imaging mass spectrometry for in situ lipidomics: from cell structures to cardiac tissue

    Författare :Sanna Sämfors; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Myocardial infarction; PC12 cells; Cell membrane; Mass spectrometry imaging; Sample preparation; Lipidomics; ToF-SIMS; Gas cluster ion beam;

    Sammanfattning : Imaging of cells and tissues is important for studying different processes within biological systems due to the spatial information provided for different molecular species during imaging. One powerful imaging technique is mass spectrometry imaging (MSI). LÄS MER

  4. 3. Brain networks in time : deriving and quantifying dynamic functional connectivity

    Författare :William Hedley Thompson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Studying the brain’s structure and function as a network has provided insight about the brain’s activity in health and disease. Networks in the brain are often averaged over trials, frequency and time and this is called functional connectivity. This thesis aims to extend the analyses beyond these assumptions and simplifications. LÄS MER

  5. 4. Fat Cats? : A Case for the Swedish Managers' Making Sense of the Developing Markets

    Författare :Michal Budryk; Katarina Blomkvist; Ivo Zander; Philip Kappen; Rajneesh Narula; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; sensemaking; immanent sensemaking; developing markets; emerging markets; globalisation; Business Studies; Företagsekonomi;

    Sammanfattning : In this thesis, I report a set of four studies designed to enhance the understanding of how managers of multinational enterprises (MNEs) perceive and make sense of their business environment under the conditions of gradual, long term environmental change. The focus lies on immanent sensemaking, a process occurring under the conditions of such an environmental change, which fails to give rise to a cosmology episode and consequently energise sensemaking as it has been traditionally understood. LÄS MER

  7. 5. Interrogation of drug effects on the lipid composition of single cells and Drosophila brain using ToF-SIMS imaging

    Författare :Thuy Mai Hoang Philipsen; Chalmers tekniska högskola; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Drosophila melanogaster; Keywords: Mass spectrometry imaging; PC12 cell.; ToF-SIMS; zinc deficiency; lipid change; methylphenidate; cocaine; cognition; omega-3 and 6- fatty acids;

    Sammanfattning : Lipids are essential for all living organisms on Earth. The most important function of lipids is that they act as the building blocks of cellular membranes. Lipids consist of polar head groups and non-polar tail groups and assemble into bilayer structures to create cell and organelle membranes. LÄS MER