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  • A volume-conserving representation of cell faces in corner point grids 

    Røe, Per; Hauge, Ragnar (Journal article; Peer reviewed, 2015)
    Corner point grids is currently the standard grid representation for use in reservoir simulation. The cell faces in corner point grids are traditionally represented as bilinear surfaces where the edges between the corner ...
  • User Interaction Data in Apps: Comparing Policy Claims to Implementations 

    Tang, Feiyang; Østvold, Bjarte Mayanja (Journal article; Peer reviewed, 2024)
    As mobile app usage continues to rise, so does the generation of extensive user interaction data, which includes actions such as swiping, zooming, or the time spent on a screen. Apps often collect a large amount of this ...
  • Statistical Embedding: Beyond Principal Components 

    Tjøstheim, Dag Bjarne; Jullum, Martin; Løland, Anders (Journal article; Peer reviewed, 2023)
    There has been an intense recent activity in embedding of very high-dimensional and nonlinear data structures, much of it in the data science and machine learning literature. We survey this activity in four parts. In the ...
  • Some recent trends in embeddings of time series and dynamic networks 

    Tjøstheim, Dag Bjarne; Jullum, Martin; Løland, Anders (Journal article; Peer reviewed, 2023)
    We give a review of some recent developments in embeddings of time series and dynamic networks. We start out with traditional principal components and then look at extensions to dynamic factor models for time series. Unlike ...
  • A comparative study of methods for estimating model-agnostic Shapley value explanations 

    Olsen, Lars Henry Berge; Glad, Ingrid Kristine; Jullum, Martin; Aas, Kjersti (Journal article; Peer reviewed, 2024)
    Shapley values originated in cooperative game theory but are extensively used today as a model-agnostic explanation framework to explain predictions made by complex machine learning models in the industry and academia. ...

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