Now showing items 3820-3839 of 8246

    • L0/L1 trigger generation by the ALICE PHOS detector 

      Liu, Lijiao (Doctoral thesis, 2011-12-14)
      Quark-Gluon Plasma (QGP) is a phase that exists above a critical temperature and corresponding energy density according to the theory of Quantum Chromo-Dynamics (QCD). The studies of the QGP help us to understand the early ...
    • Laboratory Experiments on Internal Solitary Waves in Ice-Covered Waters 

      Carr, Magda; Sutherland, P.; Haase, A.; Evers, K.-U.; Fer, Ilker; Jensen, Atle; Kalisch, Henrik; Berntsen, Jarle; Parau, E.; Thiem, Ø.; Davies, P.A. (Peer reviewed; Journal article, 2019)
      Internal solitary waves (ISWs) propagating in a stably stratified two‐layer fluid in which the upper boundary condition changes from open water to ice are studied for grease, level, and nilas ice. The ISW‐induced current ...
    • Laboratory study of frazil ice accumulation under wave conditions 

      De La Rosa, Sara; Maus, Sønke (Peer reviewed; Journal article, 2012-02-09)
      Ice growth in turbulent seawater is often accompanied by the accumulation of frazil ice crystals at its surface, forming a grease ice layer. The thickness and volume fraction of this ice layer play an important role in ...
    • Laboratory study of initial sea-ice growth: properties of grease ice and nilas 

      Naumann, Ann-Kristin; Notz, Dirk; Håvik, Lisbeth; Sirevaag, Anders (Peer reviewed; Journal article, 2012-07-10)
      We investigate initial sea-ice growth in an ice-tank study by freezing an NaCl solution of about 29 g kg−1 in three different setups: grease ice grew in experiments with waves and in experiments with a current and wind, ...
    • Lack of population genetic structure of lumpfish along the Norwegian coast: A reappraisal based on EST-STRs analyses 

      Jónsdóttir, Ólöf Dóra Bartels; Gíslason, Davíð; Ólafsdóttir, Guðbjörg; Maduna, Simo; Hagen, Snorre; Reynolds, Patrick; Sveinsson, Sæmundur; Imsland, Albert (Journal article; Peer reviewed, 2022)
      Lumpfish is now the single most important cleaner fish species to date and there is an extensive lumpfish translocation along the Norwegian coast. A reliable baseline information about the population genetic structure of ...
    • A lagrangian approach to extremal curves on stiefel manifolds 

      Hüper, Knut; Markina, Irina; Leite, Fátima Silva (Journal article; Peer reviewed, 2021)
      A unified framework for studying extremal curves on real Stiefel manifolds is presented. We start with a smooth one-parameter family of pseudo-Riemannian metrics on a product of orthogonal groups acting transitively on ...
    • Lagrangian dynamics for solid multi-body systems with the Moving Frame formalism 

      Sætran, Nicolai Mikal (Master thesis, 2018-12-11)
      Classical mechanics is the study of the motion of particles, solid bodies or of systems of bodies, and the effects of forces and moments on them. The dynamical behavior may either be studied by the application of Newtonian ...
    • Lagrangian matches between observations from aircraft, lidar and radar in a warm conveyor belt crossing orography 

      Boettcher, Maxi; Schäfler, Andreas; Sprenger, Michael; Sodemann, Harald; Kaufmann, Stefan; Voigt, Christiane; Schlager, Hans; Summa, Donato; DI Girolamo, Paolo; Nerini, Daniele; Germann, Urs; Wernli, Heini (Journal article; Peer reviewed, 2021)
      Warm conveyor belts (WCBs) are important airstreams in extratropical cyclones, often leading to the formation of intense precipitation and the amplification of upper-level ridges. This study presents a case study that ...
    • Lagrangian Measurement of Waves and Near Surface Turbulence from Acoustic Instruments 

      Bakhoday Paskyabi, Mostafa; Bryhni, Helge Thomas; Reuder, Joachim; Fer, Ilker (Peer reviewed; Journal article, 2015-12-02)
      We demonstrate high-resolution measurements of upper ocean flow and turbulence using a Lagrangian drifter. A spherical buoy as a quasi-wave following drifter mitigate the contaminations induced by wave orbital velocities ...
    • Lagrangian Measurements of Orbital Velocities in the Surf Zone 

      Bjørnestad, Maria; Buckley, M.; Kalisch, Henrik; Streßer, M.; Horstmann, J.; Frøysa, Hege Guldbrandsen; Ige, Olufemi Elijah; Cysewski, M.; Carrasco-Alvarez, R. (Journal article; Peer reviewed, 2021)
      Eulerian and Lagrangian measurements of orbital velocities in waves approaching a beach are analyzed with the goal of understanding the relative influence of wave-by-wave variations in mean-water level, wave height and ...
    • The Lagrangian particle dispersion model FLEXPART version 10.4 

      Pisso, Ignacio; Sollum, Espen; Grythe, Henrik; Kristiansen, Nina Iren; Cassiani, Massimo; Eckhardt, Sabine; Arnold, Delia; Morton, Don; Thompson, Rona Louise; Zwaaftink, Christine Groot; Evangeliou, Nikolaos; Sodemann, Harald; Haimberger, Leopold; Henne, Stephan; Brunner, Dominik; Burkhart, John; Fouilloux, Anne Claire; Brioude, Jerome; Philipp, Anne; Seibert, Petra; Stohl, Andreas (Peer reviewed; Journal article, 2019-12-02)
      The Lagrangian particle dispersion model FLEXPART in its original version in the mid-1990s was designed for calculating the long-range and mesoscale dispersion of hazardous substances from point sources, such as those ...
    • A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking 

      Chang, Yu-Fen; Hoffmann, Alex Christian (Peer reviewed; Journal article, 2015-01-10)
      In this study the liquid flow in a reverse-flow hydrocyclone is studied experimentally using the Lagrangian approach. Resin beads with densities that are close to the density of the liquid in which they move, i.e. ...
    • Lake Sediments Reveal Large Variations in Flood Frequency Over the Last 6,500 Years in South-Western Norway 

      Ekblom Johansson, Fanny Maria; Bakke, Jostein; Støren, Eivind Wilhelm Nagel; Paasche, Øyvind; Engeland, Kolbjørn; Arnaud, Fabien (Journal article; Peer reviewed, 2020)
      Lake sediments can retain imprints of past floods, enabling reconstructions that span well-beyond instrumental time series. Time series covering thousands of years can document the natural range of flood variability, which ...
    • Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum 

      Bilt, Willem van der; Lane, Christine S. (Peer reviewed; Journal article, 2019-10-23)
      Lake sediments retrieved from the beds of former nonerosive ice sheets offer unique possibilities to constrain changes in the extent and style of past glaciation, and place them in an absolutely dated context. We present ...
    • Lake stratigraphy implies an 80 000 yr delayed melting of buried dead ice in northern Russia 

      Henriksen, Mona; Mangerud, Jan; Matiouchkov, Alexei; Paus, Aage; Svendsen, John-Inge (Peer reviewed; Journal article, 2003)
      Sediment cores from lakes Kormovoye and Oshkoty in the glaciated region of the Pechora Lowland, northern Russia, reveal sediment gravity flow deposits overlain by lacustrine mud and gyttja. The sediments were deposited ...
    • Lake-sediment evidence for local and remote sources of atmospherically deposited pollutants on Svalbard 

      Rose, Neil L.; Rose, C. L.; Boyle, John F.; Appleby, P. G. (Peer reviewed; Journal article, 2004)
      Twenty-one lakes along the west coast of Svalbard were cored between 28 July and 14 August 1995. Five cores were 210Pb dated and analysed for spheroidal carbonaceous particles (SCPs), indicators of deposition from fossil-fuel ...
    • Lake-sediment records of recent environmental change on Svalbard: results of diatom analysis 

      Jones, Vivienne J.; Birks, Harry John Betteley (Peer reviewed; Journal article, 2004)
      Surface sediments from 23 lakes on Svalbard were analysed for diatoms. 182 taxa were found but samples generally have a low richness, with the majority of sites dominated by benthic genera such as Fragilaria, Navicula, and ...
    • \lambda Polarization in Heavy Ion Collisions 

      Glastad, Robert Clay (Master thesis, 2015-06-02)
      Results on transverse lambda polarization in peripheral heavy ion collisions in an exact, analytic, self-similar rotating hydrodynamics model using the gradient and curl of the inverse temperature field. We estimate the ...
    • A Lanczos-view on Independent Component Analysis of fMRI Data 

      Hanson, Erik Andreas (Master thesis, 2010-06-04)
      Analysis of resting-state fMRI data is commonly done by a combination of the two signal processing methods Principal Component Analysis (PCA) and Independent Component analysis (ICA). In this thesis, a possible error caused ...
    • Land Surface Data Assimilation of Satellite Derived Surface Soil Moisture : Towards an Integrated Representation of the Arctic Hydrological Cycle 

      Blyverket, Jostein (Doctoral thesis, 2019-10-21)
      The ability to accurately determine soil water content (soil moisture) over large areas of the Earth’s surface has potential implications in meteorology, hydrology, water and natural hazards management. The advent of ...