Nye registreringer

  • Insulating the Vacuum. Calculating the Casimir force using the boundary integral method with von Neumann boundary conditions 

    Utheim, Marius (Master thesis; Mastergradsoppgave, 2016-08-15)
    In 2012, a new method for calculating the Casimir force between compact objects was developed, expressing the force in terms of a boundary integral equation. The case of perfectly conducting objects with Dirichlet boundary ...
  • Modelling laser-matter interactions using resonant states 

    Juhász, Dávid (Master thesis; Mastergradsoppgave, 2016-05-12)
    Studying how light interacts with materials has become important for many technological applications from optical communication to developing of new materials. Therefore scientists have always tried to improve their ...
  • High frequency financial time series prediction: machine learning approach 

    Zankova, Ekaterina (Master thesis; Mastergradsoppgave, 2016-05-13)
    Machine learning is a rapidly evolving subfield of computer science. It has enormous amount of applications. One of the application domains is financial data analysis. Machine learning was usually applied for analysis and ...
  • Modelling the evolution of ideal, infinite domain patterns, on a finite domain using a Perfectly Matched Layer 

    Antrushin, Andrey (Master thesis; Mastergradsoppgave, 2016-01-28)
    The Swift-Hohenberg equation is an evolution equation which can produce a Pattern, or a pattern-like picture, to be more precise. For example, it could be used to model some simple natural patterns, like stripes and rolls ...
  • COPD in primary lung cancer patients: prevalence and mortality 

    Ytterstad, Elinor; Moe, Per Christian; Hjalmarsen, Audhild (Journal article; Peer reviewed, 2016-03-23)
    Background: Previous studies have relied on international spirometry criteria to diagnose COPD in patients with lung cancer without considering the effect lung cancer might have on spirometric results. The aim of this study ...
  • A generalization of weight polynomials to matroids 

    Johnsen, Trygve; Roksvold, Jan Nyquist; Verdure, Hugues (Tidsskriftartikkel; Peer reviewed, 2015-11-11)
    Generalizing polynomials previously studied in the context of linear codes, we define weight polynomials and an enumerator for a matroid M. Our main result is that these polynomials are determined by Betti numbers associated ...
  • A generalization of Kung’s theorem 

    Johnsen, Trygve; Shiromoto, Keisuke; Verdure, Hugues (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-01)
    We give a generalization of Kung’s theorem on critical exponents of linear codes over a finite field, in terms of sums of extended weight polynomials of linear codes. For all i=k+1,…,ni=k+1,…,n, we give an upper bound on ...
  • Stanley-Reisner resolution of constant weight linear codes 

    Johnsen, Trygve; Verdure, Hugues (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-08)
    Given a constant weight linear code, we investigate its weight hierarchy and the Stanley–Reisner resolution of its associated matroid regarded as a simplicial complex. We also exhibit conditions on the higher weights ...
  • Betti numbers associated to the facet ideal of a matroid 

    Johnsen, Trygve; Roksvold, Jan Nyquist; Verdure, Hugues (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-06)
    To a matroid M with n edges, we associate the so-called facet ideal F(M)⊂k[x1,…,xn] , generated by monomials corresponding to bases of M. We show that when M is a graph, the Betti numbers related to an ℕ0-graded minimal ...
  • Stem cell regulation: Implications when differentiated cells regulate symmetric stem cell division 

    Høyem, Marte Rørvik; Måløy, Frode; Jakobsen, Per; Brandsdal, Bjørn Olav (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-05-19)
    We use a mathematical model to show that if symmetric stem cell division is regulated by differentiated cells, then changes in the population dynamics of the differentiated cells can lead to changes in the population ...
  • Dørene lukkes for klimamålene 

    Rypdal, Kristoffer (Journal article; Tidsskriftartikkel, 2016)
    FNs klimapanel har utarbeidet en rekke prognoser for økningen i global middeltemperatur basert på ulike scenarier for ­ut­vik­lingen av utslipp av drivhusgasser og partikler fra menneskelig aktivitet. Disse prognosene er ...
  • Holdbarhet på klippfisk. Vekst av rødmidd i klippfisk lagret ved forhøyede temperaturer (AP2) 

    Lorentzen, Grete Elisabeth; Johansen, Jørn-Owe; Breiland, Mette Serine Wesmajervi; Dahl, Reidun Wenche; Sandaker, Elin Kristianne; Ytterstad, Elinor (Research report; Forskningsrapport, 2016-02)
    I prosjektet «Holdbarhet på klippfisk» er det foretatt studier for å fastsette holdbarhet på klippfisk basert på vekst av rødmidd. Denne rapporten referer til studier hvor klippfisk er lagret ved forhøyede temperaturer. ...
  • Limits to the quantification of local climate change 

    Chapman, Sandra; Stainforth, David A.; Watkins, Nicholas W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-16)
    Abstract Wedemonstrate how the fundamental timescales of anthropogenic climate change limit the identification of societally relevant aspects of changes in precipitation.Weshow that it is nevertheless possible to extract, ...
  • Computer-aided decision support for melanoma detection applied on melanocytic and non-melanocytic skin lesions: a comparison of two systems based on automatic analysis of dermoscopic images 

    Møllersen, Kajsa; Kirchesch, Herbert M.; Zortea, Maciel; Schopf, Thomas Roger Griesbeck; Hindberg, Kristian; Godtliebsen, Fred (Journal article; Tidsskriftartikkel; Peer reviewed, 2015)
    Commercially available clinical decision support systems (CDSSs) for skin cancer have been designed for the detection of melanoma only. Correct use of the systems requires expert knowledge, hampering their utility for ...
  • Attribution in the presence of a long-memory climate response 

    Rypdal, Kristoffer (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-18)
    Multiple, linear regression is employed to attribute variability in the global surface temperature to various forcing components and prominent internal climatic modes. The purpose of the study is to assess how sensitive ...
  • Network analysis of geomagnetic substorms using the SuperMAG database of ground-based magnetometer stations 

    Dods, Joe; Chapman, Sandra; Gjerløv, Jesper (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-26)
    The overall morphology and dynamics of magnetospheric substorms is well established in terms of the observed qualitative auroral features seen in ground-based magnetometers. This paper focuses on the quantitative ...
  • Klimakrisen og økonomisk politikk 

    Rypdal, Kristoffer (Chronicle; Kronikk, 2015-11-14)
  • Long-memory effects in linear response models of Earth's temperature and implications for future global warming 

    Rypdal, Martin Wibe; Rypdal, Kristoffer (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-07-15)
    A linearized energy-balance model for global temperature is formulated, featuring a scale-invariant longrange memory (LRM) response and stochastic forcing representing the influence on the ocean heat reservoir from ...
  • Dørene lukkes for klimamålene 

    Rypdal, Kristoffer (Chronicle; Kronikk, 2015-11-10)
  • Global warming projections derived from an observation-based minimal model 

    Rypdal, Kristoffer (Journal article; Tidsskriftartikkel, 2015-09-18)
    A simple conceptual model for the global mean surface temperature (GMST) response to CO2 emissions is presented and analysed. It consists of linear long-memory models for the GMST anomaly response ∆T to radiative forcing ...

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