Search for dissertations about: "Low dimensionality"

Showing result 1 - 5 of 54 swedish dissertations containing the words Low dimensionality.

  1. 1. Online Dimensionality Reduction

    Author : Kaito Ariu; Alexandre Proutiere; Mikael Johansson; Richard Combes; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this thesis, we investigate online dimensionality reduction methods, wherethe algorithms learn by sequentially acquiring data. We focus on two specificalgorithm design problems in (i) recommender systems and (ii) heterogeneousclustering from binary user feedback. READ MORE

  2. 2. Terminating species and Lewis acid-base preference in oxohalides – a new route to low-dimensional compounds

    Author : Richard Becker; Mats Johnsson; Jean Galy; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Low dimensionality; crystal structures; tellurites; selenites; oxohalides; Inorganic chemistry; Oorganisk kemi;

    Abstract : This thesis is based upon synthesis and structure determination of new transition metal oxo-halide compounds, which includes p-element cations that have a stereochemically active lone pair. A synthesis concept has been developed, which uses several different structural features to increase the possibility to yield a low-dimensional arrangement of transition metal cations. READ MORE

  3. 3. Electron Transport in Low Dimensional Systems

    Author : Peter Ramvall; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; high mobility; low-dimensional structures; III-V semiconductors; quantum wells; heterojunctions; quantum Hall effect; edge channels; Shubnikov-de Haas effect; alloy-disorder scattering; Y-branch switch; two dimensional electron gas; Fysik; Fysicumarkivet A:1996:Ramvall; Physics; spin splitting; mag;

    Abstract : This thesis consists of experimental studies of transport properties in high mobility two dimensional electron gases (2DEGs). Two material systems are used, an AlGaAs/GaAs heterojunction and a GaInAs/InP quantum well. READ MORE

  4. 4. Parenting stress : Conceptual and methodological issues

    Author : Monica Östberg; Uppsala universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Psychology; Parenting stress; dimensionality; validity; structural equation modeling; social support; infant temperament; responsiveness; Psykologi; Psychology; Psykologi; Psychology; psykologi;

    Abstract : High parenting stress has been connected with negative consequences for both parent and child. The aim of the present thesis was to examine factors contributing to high stress, and to develop a psychometrically sound, reliable, and valid instrument for measuring parenting stress. READ MORE

  5. 5. "Everybody gets a little bit loco”: Interactions between psychotic experiences and substance use as dimensional phenomena

    Author : Jonas Stålheim; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : psychosis; substance use; mentalization; affect regulation; dimensionality;

    Abstract : A large amount of persons with psychosis experience problems related to substance use; and many persons with substance use disorders develop psychiatric symptoms, including psychotic experiences (PEs). The co-existence of PEs and substance use disorders increases the risk for social exclusion, health adversities, violence, and aggravation of symptoms. READ MORE