Now showing items 1-20 of 1454

    • Potential and challenges of wind measurements using met-masts in complex topography for bridge design: Part II – Spectral flow characteristics 

      Zakari, Aoudou Midjiyawa; Cheynet, Etienne; Reuder, Joachim; Ágústsson, Hálfdán; Kvamsdal, Trond (Peer reviewed; Journal article, 2021)
      This study quantifies the influence of the local topography on sonic anemometer measurements mounted on tall met-masts deployed in Norwegian fjords. This assessment is done by analysing the second-order structure of ...
    • The stable category of Gorenstein flat sheaves on a noetherian scheme 

      Christensen, Lars Winther; Estrada, Sergio; Thompson, Peder (Journal article; Peer reviewed, 2021)
    • Minimal semi-flat-cotorsion replacements and cosupport 

      Nakamura, Tsutomu; Thompson, Peder (Journal article; Peer reviewed, 2020)
      Over a commutative noetherian ring Rof finite Krull dimension, we show that every complex of flat cotorsion R-modules decomposes as a direct sum of a minimal complex and a contractible complex. Moreover, we define the ...
    • Phenological asynchrony: a ticking time‐bomb for seemingly stable populations? 

      Simmonds, Emily Grace; Cole, Ella F.; Sheldon, Ben C.; Coulson, Tim (Peer reviewed; Journal article, 2020)
      Climate change has been shown to induce shifts in the timing of life‐history events. As a result, interactions between species can become disrupted, with potentially detrimental effects. Predicting these consequences has ...
    • GANs enabled super-resolution reconstruction of wind field 

      Tran, Duy Tan; Robinson, Haakon; Rasheed, Adil; San, Omer; Tabib, Mandar; Kvamsdal, Trond (Peer reviewed; Journal article, 2020)
      Atmospheric flows are governed by a broad variety of spatio-temporal scales, thus making real-time numerical modeling of such turbulent flows in complex terrain at high resolution computationally unmanageable. In this ...
    • Mobile Sensing in Substance Use Research: A Scoping Review 

      Lauvsnes, Anders Dahlen Forsmo; Langaas, Mette; Toussaint, Pieter Jelle; Gråwe, Rolf W. (Peer reviewed; Journal article, 2020)
      Background:Addictive disorders and substance use are significant health challenges worldwide, and relapse is a core component of addictive disorders. The dynamics surrounding relapse and especially the immediate period ...
    • Don’t gamble the COVID-19 response on ecological hypotheses 

      Carlson, Colin; Chipperfield, Joseph; Benito, Blas; Telford, Richard; OHara, Robert Brian (Journal article; Peer reviewed, 2020)
    • A note on the zeros of approximations of the Ramanujan Ξ−function 

      Chirre, Andrés; Velásquez, Oswaldo (Peer reviewed; Journal article, 2020)
      In this paper we review the study of the distribution of the zeros of certain approximations for the Ramanujan Ξ-function given by Ki (Ramanujan J 17(1):123–143, 2008), and we provide new proofs of his results. Our approach ...
    • Species distribution models are inappropriate for COVID-19 

      Carlson, Colin; Chipperfield, Joseph; Benito, Blas; Telford, Richard; OHara, Robert Brian (Journal article; Peer reviewed, 2020)
    • Instability of the solitary waves for the generalized Boussinesq equations 

      Li, Bing; Ohta, Masahito; Wu, Yifei; Xue, Jun (Peer reviewed; Journal article, 2020)
      In this work, we consider the following generalized Boussinesq equation \begin{align*} \partial_{t}^2u-\partial_{x}^2u+\partial_{x}^2(\partial_{x}^2u+|u|^{p}u)=0,\qquad (t,x)\in\R\times \R, \end{align*} with $0<p<\infty$. ...
    • Homotopy categories of totally acyclic complexes with applications to the flat-cotorsion theory 

      Christensen, Lars Winther; Estrada, Sergio; Thompson, Peder (Peer reviewed; Journal article, 2019)
      We introduce a notion of total acyclicity associated to a subcategory of an abelian category and consider the Gorenstein objects they define. These Gorenstein objects form a Frobenius category, whose induced stable category ...
    • Bayesian Inversion of Convolved Hidden Markov Models With Applications in Reservoir Prediction 

      Fjeldstad, Torstein Mæland; Omre, Henning (Peer reviewed; Journal article, 2019)
      The efficient assessment of convolved hidden Markov models is discussed. The bottom layer is defined as an unobservable categorical first-order Markov chain, whereas the middle layer is assumed to be a Gaussian spatial ...
    • Recollections of V. S. Varadarajan 

      Digernes, Trond; Varadhan, S.R.S.; Rapoport, Michael; Gangolli, Ramesh; Fioresi, Rita; Blasius, Don (Peer reviewed; Journal article, 2020)
      Known to friends, students, and colleagues just as Raja, Veeravalli Seshadri Varadarajan (born May 18, 1937) was a mathematician of Indian origin who made foundational contributions to multiple fields, including probability, ...
    • Ola Bratteli and His Diagrams 

      Landstad, Magnus Brostrup; Elliott, George A.; Bratteli, Tone; Digernes, Trond; Størmer, Erling; Robinson, Derek W; Kishimoto, Akitaka; Jorgensen, Palle E.T.; Evans, David E. (Peer reviewed; Journal article, 2020)
    • Strengthening the evidence base for temperature-mediated phenological asynchrony and its impacts 

      Samplonius, Jelmer; Atkinson, Angus; Hassall, Christopher; Keogan, Katherine; Thackeray, Stephen J.; Assmann, Jakob J.; Burgess, Malcolm D.; Macphie, Kirsty H; Pearce-Higgins, James W.; Simmonds, Emily Grace; Johansson, Jacob; Varpe, Øystein; Weir, James C; Childs, Dylan Z.; Cole, Ella F.; Daunt, Francis; Hart, Tom; Lewis, Owen T.; Pettorelli, Nathalie; Sheldon, Ben C.; Phillimore, Albert B. (Journal article; Peer reviewed, 2020)
      Climate warming has caused the seasonal timing of many components of ecological food chains to advance. In the context of trophic interactions, the match–mismatch hypothesis postulates that differential shifts can lead to ...
    • Potential and challenges of wind measurements using met-masts in complex topography for bridge design: Part I - Integral flow characteristics 

      Midjiyawa, zakari; Cheynet, Etienne; Reuder, Heinrich Joachim; Ágústsson, Hálfdán; Kvamsdal, Trond (Peer reviewed; Journal article, 2021)
      The paper investigates the local topographic effect on the mean and integral flow characteristics recorded by sonic anemometers mounted on tall masts near the shoreline of three different Norwegian fjords. Two years of ...
    • A refinement of Gorenstein flat dimension via the flat--cotorsion theory 

      Christensen, Lars Winther; Estrada, Sergio; Liang, Li; Thompson, Peder; Wu, Dejun; Yang, Gang (Peer reviewed; Journal article, 2021)
      We introduce a refinement of the Gorenstein flat dimension for complexes over an associative ring—the Gorenstein flat-cotorsion dimension—and prove that it, unlike the Gorenstein flat dimension, behaves as one expects of ...
    • Data Integration for Large-Scale Models of Species Distributions 

      Isaac, Nick J.B.; OHara, Robert Brian (Peer reviewed; Journal article, 2019)
      With the expansion in the quantity and types of biodiversity data being collected, there is a need to find ways to combine these different sources to provide cohesive summaries of species’ potential and realized distributions ...
    • Age of First Walking and Associations with Symptom Severity in Children with Suspected or Diagnosed Autism Spectrum Disorder 

      Reindal, Lise; Nærland, Terje; Lydersen, Stian; Weidle, Bernhard; Andreassen, Ole Andreas; Sund, Anne Mari (Peer reviewed; Journal article, 2020)
      Age of first walking (AOW) is reported to be later in autism spectrum disorder (ASD) compared with typical development. However, the relationship between AOW and variations in ASD symptoms across different neurodevelopmental ...
    • Optimal small data scattering for the generalized derivative nonlinear Schrödinger equations 

      Bai, Ruobing; Wu, Yifei; Xue, Jun (Peer reviewed; Journal article, 2020)
      In this work, we consider the following generalized derivative nonlinear Schr\"odinger equation \begin{align*} i\partial_t u+\partial_{xx} u +i |u|^{2\sigma}\partial_x u=0, \quad (t,x)\in \R\times \R. \end{align*} We prove ...