Sökning: "Cluster"

Visar resultat 1 - 5 av 958 avhandlingar innehållade ordet Cluster.

  1. 1. Cluster Initiatives as Intermediaries A Study of their Management and Stakeholders

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Inessa Laur; Linköpings universitet.; Linköpings universitet.; Linköpings universitet.; [2015]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Cluster; cluster initiatives; intermediary organization; regional development; entrepreneurship; success factors; actors stakeholders and activities;

    Sammanfattning : This dissertation offers a platform to understand the nature of cluster initiatives as a socio-economic phenomenon combining cluster, entrepreneurship and intermediary features. They are particular types of ventures facilitating networks and dialog platforms adjusted to local contexts and offering a way to enhance regional development. LÄS MER

  2. 2. Bayesian Cluster Analysis Some Extensions to Non-standard Situations

    Detta är en avhandling från Stockholm : Statistiska institutionen

    Författare :Jessica Franzén; Stockholms universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cluster analysis; Clustering; Classification; Mixture model; Gaussian; Bayesian inference; MCMC; Gibbs sampler; Deviant group; Longitudinal; Missing data; Multiple imputation; SOCIAL SCIENCES Statistics; computer and systems science Statistics; SAMHÄLLSVETENSKAP Statistik; data- och systemvetenskap Statistik; statistik; Statistics;

    Sammanfattning : The Bayesian approach to cluster analysis is presented. We assume that all data stem from a finite mixture model, where each component corresponds to one cluster and is given by a multivariate normal distribution with unknown mean and variance. LÄS MER

  3. 3. Simulations of water clustering in vapour, hydrocarbons and polymers

    Detta är en avhandling från Chalmers tekniska högskola

    Författare :Erik Johansson; Högskolan i Borås.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cluster; gibbs ensemble; monte carlo; water; polyethylene; external field; ions; Energi och material; Water; Monte Carlo; Gibbs Ensemble; Ion; External field; Cluster; Polyethylene;

    Sammanfattning : It is commonly known that water plays a crucial role in many natural and industrial processes. One of these processes is the formation of water trees, and the subsequent breakdown of polyethylene used for high voltage cable insulation purposes. LÄS MER

  4. 4. A Treatise on the Geometric and Electronic Structure of Clusters Investigated by Synchrotron Radiation Based Electron Spectroscopies

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Andreas Lindblad; Uppsala universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cluster; nanoparticle; Heterogeneous; Homogeneous; Mixed; Cluster production methods; co-expansion; pick-up; doping; Cluster geometry; radial segregation; Interatomic Coulombic Decay; ICD; Auger electron spectroscopy; AES; X-ray photoelectron spectroscopy; XPS; Ultra-violet spectroscopy; UPS; Noble gas; Rare gas; Ne; Ar; Kr; Xe; Ammonia; NH3; Sulphur hexafluoride; SF6; MAX-lab; BESSY; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Sammanfattning : Clusters are finite ensembles of atoms or molecules with sizes in the nanometer regime (i.e. nanoparticles). This thesis present results on the geometric and electronic structure of homogeneous and heterogeneous combinations of atoms and molecules. LÄS MER

  5. 5. Magnetic Reconnection in Space Plasmas Cluster Spacecraft Observations

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Alessandro Retinò; Uppsala universitet.; [2007]
    Nyckelord :Space and plasma physics; space physics; plasma astrophysics; plasma physics; transport processes; boundary layers; magnetic reconnection; turbulence; particle acceleration; solar system; magnetospheres; Rymd- och plasmafysik;

    Sammanfattning : Magnetic reconnection is a universal process occurring at boundaries between magnetized plasmas, where changes in the topology of the magnetic field lead to the transport of charged particles across the boundaries and to the conversion of electromagnetic energy into kinetic and thermal energy of the particles. Reconnection occurs in laboratory plasmas, in solar system plasmas and it is considered to play a key role in many other space environments such as magnetized stars and accretion disks around stars and planets under formation. LÄS MER