Now showing items 372-391 of 630

    • Obscurance-based Volume Rendering Framework 

      Ruiz, Marc; Boada, Imma; Viola, Ivan; Bruckner, Stefan; Feixas, Miquel; Sbert, Mateu (Proceedings of Volume Graphics 2008., Conference object; Peer reviewed, 2008)
      lighting effects in a faster way than global illumination. Its application in volume visualization is of special interest since it permits us to generate a high quality rendering at a low cost. In this paper, we propose ...
    • OLS Dialog: An open-source front end to the Ontology Lookup Service 

      Barsnes, Harald; Côté, Richard G.; Eidhammer, Ingvar; Martens, Lennart (Peer reviewed; Journal article, 2010-01-17)
      Background: With the growing amount of biomedical data available in public databases it has become increasingly important to annotate data in a consistent way in order to allow easy access to this rich source of information. ...
    • On a New Method for Derivative Free Optimization 

      Frimannslund, Lennart; Steihaug, Trond (Peer reviewed; Journal article, 2011)
      A new derivative-free optimization method for unconstrained optimization of partially separable functions is presented. Using average curvature information computed from sampled function values the method generates an ...
    • On Classification and Some Properties of APN Functions 

      Sun, Bo (Doctoral thesis, 2018-06-22)
      Boolean functions optimal with respect to different cryptographic properties (such as APN, AB, bent functions, etc.) are crucial to the design of secure cryptosystems. Investigating the properties and construction of these ...
    • On Connections Between Graphs, Codes, Quantum States, and Boolean Functions 

      Danielsen, Lars Eirik (Doctoral thesis, 2008-05-28)
      We study objects that can be represented as graphs, error-correcting codes, quantum states, or Boolean functions. It is known that self-dual additive codes, which can also be interpreted as quantum states, can be represented ...
    • On Curvature and Separability in Unconstrained Optimisation 

      Frimannslund, Lennart (Doctoral thesis, 2006-06-16)
    • On cutwidth parameterized by vertex cover 

      Cygan, Marek; Lokshtanov, Daniel; Pilipczuk, Marcin; Pilipczuk, Michal Pawel; Saurabh, Saket (Peer reviewed; Journal article, 2014-04)
      We study the CUTWIDTH problem, where the input is a graph G, and the objective is find a linear layout of the vertices that minimizes the maximum number of edges intersected by any vertical line inserted between two ...
    • On decoding additive generalized twisted Gabidulin codes 

      Kadir, Wrya; Li, Chunlei (Journal article; Peer reviewed, 2020)
      In this paper, we consider an interpolation-based decoding algorithm for a large family of maximum rank distance codes, known as the additive generalized twisted Gabidulin codes, over the finite field Fqn for any prime ...
    • On equivalence between known families of quadratic APN functions 

      Budaghyan, Lilya; Calderini, Marco; Villa, Irene (Journal article; Peer reviewed, 2020)
      This paper is dedicated to a question whether the currently known families of quadratic APN polynomials are pairwise different up to CCZ-equivalence. We reduce the list of these families to those CCZ-inequivalent to each ...
    • On Isotopic Shift Construction for Planar Functions 

      Budaghyan, Lilya; Calderini, Marco; Carlet, Claude; Coulter, Robert; Villa, Irene (Chapter; Conference object; Peer reviewed, 2019)
      CCZ-equivalence is the most general currently known equivalence relation for functions over finite fields preserving planarity and APN properties. However, for the particular case of quadratic planar functions isotopic ...
    • On iterative decoding of high-density parity-check codes using edge-local complementation 

      Knudsen, Joakim Grahl (Doctoral thesis, 2010-11-24)
      The overall topic of this work is a graph operation known as edgelocal complementation (ELC) and its applications to iterative decoding of classical codes. Although these legacy codes are arguably not well-suited for ...
    • On KDE-based brushing in scatterplots and how it compares to CNN-based brushing 

      Fan, Chaoran; Hauser, Helwig (Chapter, 2019)
      In this paper, we investigate to which degree the human should be involved into the model design and how good the empirical model can be with more careful design. To find out, we extended our previously published Mahalanobis ...
    • On offshore wind farm maintenance scheduling for decision support on vessel fleet composition 

      Gutierrez-Alcoba, Alejandro; Hendrix, Eligius M.T.; Lopez, Gloria Ortega; Halvorsen-Weare, Elin Espeland; Haugland, Dag (Peer reviewed; Journal article, 2019)
      Maintenance costs account for a large part of the total cost of an offshore wind farm. Several models have been presented in the literature to optimize the fleet composition of the required vessels to support maintenance ...
    • On properties of translation groups in the affine general linear group with applications to cryptography 

      Calderini, Marco; Civino, Roberto; Sala, Massimiliano (Journal article; Peer reviewed, 2021)
      The affine general linear group acting on a vector space over a prime field is a well-understood mathematical object. Its elementary abelian regular subgroups have recently drawn attention in applied mathematics thanks to ...
    • On relations between CCZ- and EA-equivalences 

      Villa, Irene; Calderini, Marco; Budaghyan, Lilya (Peer reviewed; Journal article, 2020)
      In the present paper we introduce some sufficient conditions and a procedure for checking whether, for a given function, CCZ-equivalence is more general than EA-equivalence together with taking inverses of permutations. ...
    • On Self-Dual Quantum Codes, Graphs, and Boolean Functions 

      Danielsen, Lars Eirik (Master thesis, 2005)
      A short introduction to quantum error correction is given, and it is shown that zero-dimensional quantum codes can be represented as self-dual additive codes over GF(4) and also as graphs. We show that graphs representing ...
    • On shared use of renewable stocks 

      Ekerhovd, Nils-Arne; Flåm, Sjur Didrik; Steinshamn, Stein Ivar (Journal article; Peer reviewed, 2020)
      Considered here is multi-party exploitation of common property, renewable resources. The parties play various dynamic games differing in degree of cooperation and commitment. Comparisons of steady states clarify issues on ...
    • On Stable Marriages and Greedy Matchings 

      Manne, Fredrik; Naim, Md.; Lerring, Håkon; Halappanavar, Mahantesh (Conference object; Peer reviewed, 2016)
      Research on stable marriage problems has a long and mathematically rigorous history, while that of exploiting greedy matchings in combinatorial scientific computing is a younger and less developed research field. We consider ...
    • On the Asymptotics of Solving the LWE Problem Using Coded-BKW With Sieving. 

      Guo, Qian; Johansson, Thomas; Mårtensson, Erik; Wagner, Paul Stankovski (Peer reviewed; Journal article, 2019)
    • On the Boomerang Uniformity of some Permutation Polynomials 

      Calderini, Marco; Villa, Irene (Journal article; Peer reviewed, 2020)
      The boomerang attack, introduced by Wagner in 1999, is a cryptanalysis technique against block ciphers based on differential cryptanalysis. In particular it takes into consideration two differentials, one for the upper ...