Now showing items 36899-36918 of 38070

    • Variability in Calanus spp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding 

      Vogedes, Daniel Ludwig; Eiane, Ketil; Båtnes, Anna Solvang; Berge, Jørgen (Journal article; Peer reviewed, 2014)
      We studied the abundance of calanoid copepods of the genus Calanus in a high-resolution sampling grid located in the vicinity of a breeding colony of an avian Calanus predator, the little auk (Alle alle) in an Arctic fjord ...
    • Variability of activity patterns across mood disorders and time of day 

      Krane-Gartiser, Karoline; Vaaler, Arne; Fasmer, Ole Bernt; Sørensen, Kjetil; Morken, Gunnar; Scott, Janine Linda (Journal article; Peer reviewed, 2017)
      Background: Few actigraphy studies in mood disorders have simultaneously included unipolar (UP) and bipolar (BD) depression or BD mixed states as a separate subgroup from mania. This study compared objectively measured ...
    • Variability of echocardiographic measures of left ventricular diastolic function. The HUNT study 

      Letnes, Jon Magne; Eriksen-Volnes, Torfinn; Nes, Bjarne; Wisløff, Ulrik; Salvesen, Øyvind; Dalen, Håvard (Peer reviewed; Journal article, 2021)
      Objective: Investigate variability related to image acquisition and reading process for echocardiographic measures of left ventricular (LV) diastolic function, and its influence on classification of LV diastolic dysfunction ...
    • Variability Over Time of Normal-Sized Fetal Renal Pelvis During the Second Trimester Scan 

      Røset, Maria Aurora Hernandez; Blaas, Harm-Gerd Karl; Fagerli, Tove Anita; Eggebø, Torbjørn Moe (Journal article, 2017)
      Purpose To investigate the variability of the normal-sized fetal renal pelvis (≤5 mm) over time and to analyze repeatability of measurements. Materials and Methods 98 fetal renal pelvises and 49 fetal urinary bladders ...
    • Variable Selection and Redundancy in Multivariate Regression Models 

      Westad, Frank; Marini, Federico (Journal article, 2022)
      Variable selection is a topic of interest in many scientific communities. Within chemometrics, where the number of variables for multi-channel instruments like NIR spectroscopy and metabolomics in many situations is larger ...
    • Variable source depth acquisition for improved marine broadband seismic data 

      Haavik, Kjetil Eik; Landrø, Martin (Journal article; Peer reviewed, 2015-05)
      In marine seismic data acquisition, varying the source depth along a sail line gives diversity in sequential shot gather frequency spectra. Undesired alterations of the frequency spectra are created by the source ghost and ...
    • Variable Speed Hydropower Conversion and Control 

      Reigstad, Tor Inge; Uhlen, Kjetil (Peer reviewed; Journal article, 2020)
      The objective of this paper is to develop and analyse a variable speed hydropower (VSHP) model that can aid the design of controllers that maximize the utilization of power plant for the provision of ancillary services, ...
    • Variable speed hydropower plant with virtual inertia control for provision of fast frequency reserves 

      Reigstad, Tor Inge; Uhlen, Kjetil (Journal article; Peer reviewed, 2020)
    • Variable step size commutator free Lie group integrators 

      Curry, Charles Henry Alexander; Owren, Brynjulf (Journal article; Peer reviewed, 2019)
      We introduce variable step size commutator free Lie group integrators, where the error control is achieved using embedded Runge–Kutta pairs. These are schemes for the integration of initial value problems posed on homogeneous ...
    • Variable V2 in Norwegian Heritage Language: An effect of crosslinguistic influence? 

      Westergaard, Marit; Lohndal, Terje; Lundquist, Bjørn (Peer reviewed; Journal article, 2021)
      This paper discusses possible attrition of verb second (V2) word order in Norwegian heritage language by investigating a corpus of spontaneous speech produced by 50 2nd–4th generation heritage speakers in North America. ...
    • Variable-speed operation and pressure pulsations in a Francis turbine and a pump-turbine 

      Iliev, Igor; Trivedi, Chirag; Agnalt, Einar; Dahlhaug, Ole Gunnar (Journal article; Peer reviewed, 2019)
      The paper presents result from model measurements of the efficiency and pressure pulsation intensities for two low-specific-speed hydraulic turbines operated at variable speed, namely, one splitter-bladed Francis turbine ...
    • Variable-speed operation of hydropower plants: past, present, and future 

      Valavi, Mostafa; Nysveen, Arne (Journal article; Peer reviewed, 2018)
      In This article, the state of the art in the variable-speed operation of hydropower plants is reviewed, with a focus on pumped-storage hydropower. Relevant literature is reviewed to address the benefits of variable-speed ...
    • Variance-Based Exploration for Learning Model Predictive Control 

      Seel, Katrine; Bemporad, Alberto; Gros, Sebastien Nicolas; Gravdahl, Jan Tommy (Peer reviewed; Journal article, 2023)
      The combination of model predictive control (MPC) and learning methods has been gaining increasing attention as a tool to control systems that may be difficult to model. Using MPC as a function approximator in reinforcement ...
    • Variants associated with HHIP expression have sex-differential effects on lung function 

      Fawcett, Katherine A.; Obeidat, Ma'en; Melbourne, Carl; Shrine, Nick; Guyatt, Anna L.; John, Catherine; Luan, Jian'an; Richmond, Anne; Moksnes, Marta R.; Granell, Raquel; Weiss, Stefan; Imboden, Medea; May-Wilson, Sebastian; Hysi, Pirro; Boutin, Thibaud S.; Portas, Laura; Flexeder, Claudia; Harris, Sarah E.; Wang, Carol A.; Lyytikäinen, Leo-Pekka; Palviainen, Teemu; Foong, Rachel E.; Keidel, Dirk; Minelli, Cosetta; Langenberg, Claudia; Bossé, Yohan; Berge, Maarten Van den; Sin, Don D.; Hao, Ke; Campbell, Archie; Porteous, David; Padmanabhan, Sandosh; Smith, Blair H.; Evans, David M.; Ring, Sue; Langhammer, Arnulf; Hveem, Kristian; Willer, Cristen J.; Ewert, Ralf; Stubbe, Beate; Pirastu, Nicola; Klaric, Lucija; Joshi, Peter K.; Patasova, Karina; Massimo, Mangino; Polasek, Ozren; Starr, John M.; Karrasch, Stefan; Strauch, Konstantin; Meitinger, Thomas; Rudan, Igor; Rantanen, Taina; Pietiläinen, Kirsi; Kähönen, Mika; Raitakari, Olli T.; Hall, GL; Sly, Peter D.; Pennell, CE; Kaprio, Jaakko; Lehtimäki, Terho; Vitart, Veronique; Deary, Ian J.; Jarvis, Deborah; Wilson, JF; Spector, Tim; Probst-Hensch, Nicole; Wareham, Nick; Völzke, Henry; Henderson, John; Strachan, David P.; Brumpton, Ben Michael; Hayward, Caroline; Hall, Ian P.; Tobin, Martin D.; Wain, Louise V. (Peer reviewed; Journal article, 2021)
      Background: Lung function is highly heritable and differs between the sexes throughout life. However, little is known about sex-differential genetic effects on lung function. We aimed to conduct the first genome-wide ...
    • Variants in ELL2 influencing immunoglobulin levels associate with multiple myeloma 

      Swaminathan, Bhairavi; Thorleifsson, Gudmar; Jöud, Magnus; Ali, Mina; Johnsson, Ellinor; Ajore, Ram; Sulem, Patrick; Halvarsson, Britt-Marie; Eyjolfsson, Gudmundur I.; Haraldsdottir, Vilhelmina; Hultman, Christina; Ingelsson, Erik; Kristinsson, Sigurdur Y; Kähler, Anna Katarina; Lenhoff, Stig; Masson, Gisli; Mellqvist, Ulf-Henrik; Månsson, Robert; Nelander, Sven; Olafsson, Isleifur; Sigurdardóttir, Olöf Gudrun; Steingrimsdottir, Hlif; Vangsted, Annette; Vogel, Ulla; Waage, Anders; Nahi, Hareth; Gudbjartsson, Daniel F.; Rafnar, Thorunn; Turesson, Ingemar; Gullberg, Urban; Stefansson, Kari; Hansson, Markus; Thorsteinsdottir, Unnur; Nilsson, Björn (Journal article; Peer reviewed, 2015)
      Multiple myeloma (MM) is characterized by an uninhibited, clonal growth of plasma cells. While first-degree relatives of patients with MM show an increased risk of MM, the genetic basis of inherited MM susceptibility is ...
    • Variation across individuals and domains in Norwegian heritage language 

      Lundquist, Bjørn; Anderssen, Merete; Lohndal, Terje; Westergaard, Marit (Peer reviewed; Journal article, 2020)
      This paper investigates spontaneous production from 50 speakers of Norwegian heritage language in the Corpus of American Nordic Speech and studies the interplay between four linguistic properties: possessives and double ...
    • Variation and change in Norwegian wh-questions: The role of the complementizer som 

      Westergaard, Marit; Vangsnes, Øystein A; Lohndal, Terje (Journal article; Peer reviewed, 2017)
      In this paper, we consider variation in Verb Second (V2) word order in wh-questions across Norwegian dialects by investigating data from the Nordic Syntax Database (NSD), which consists of acceptability judgments collected ...
    • Variation and correlation in the timing of breeding of North Atlantic seabirds across multiple scales 

      Keogan, Katharine; Daunt, Francis; Wanless, Sarah; Phillips, Richard A.; Alvarez, David; Anker-Nilssen, Tycho; Barrett, Robert; Bech, Claus; Becker, Peter H.; Berglund, Per-Arvid; Bouwhuis, Sandra; Burr, Zofia M.; Chastel, Olivier; Christensen-Dalsgaard, S*; Christensen-Dalsgaard, Signe; Descamps, Sebastien; Diamond, Tony; Elliott, Kyle; Erikstad, Kjell E.; Harris, Mike; Hentati-Sundberg, Jonas; Heubeck, Martin; Kress, Stephen W.; Langset, Magdalene; Lorentsen, Svein-Håkon; Major, Heather L.; Mallory, Mark; Mellor, Mick; Miles, Will T.S.; Moe, Børge; Mostello, Carolyn; Newell, Mark; Nisbet, Ian; Reiertsen, Tone Kristin; Rock, Jennifer; Shannon, Paula; Varpe, Øystein; Lewis, Sue; Phillimore, Albert B. (Peer reviewed; Journal article, 2022)
      1. Timing of breeding, an important driver of fitness in many populations, is widely studied in the context of global change, yet despite considerable efforts to identify environmental drivers of seabird nesting phenology, ...
    • Variation for Piecewise Constant Functions on Triangular Meshes with Applications in Imaging 

      Baumgartner, Lukas; Bergmann, Ronny; Herzog, Roland; Schmidt, Stephan; Vidal Núñez, José (Journal article, 2023)
      We propose a novel discrete concept for the total generalized variation (TGV), which was originally derived to reduce the staircasing effect in classical total variation regularization, in image denoising problems. We ...