Blar i Faculty of Mathematics and Natural Sciences på tittel

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    • (Re)packing Equal Disks into Rectangle 

      Fomin, Fedor; Golovach, Petr; Inamdar, Tanmay Nitin; Zehavi, Meirav (Journal article; Peer reviewed, 2022)
      The problem of packing of equal disks (or circles) into a rectangle is a fundamental geometric problem. (By a packing here we mean an arrangement of disks in a rectangle without overlapping.) We consider the following ...

    • Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record 

      Abbott, Peter M.; Austin, William E.N.; Davies, Siwan M.; Pearce, Nicholas John Geoffrey; Rasmussen, Tine Lander; Wastegård, Stefan; Brendryen, Jo (Peer reviewed; Journal article, 2014-09-01)
      Previous studies of marine sequences from the Faroe Islands region have identified a series of coarse-grained tephra horizons deposited during Marine Isotope Stage (MIS) 5. Here we reassess the MIS 5 tephrostratigraphy of ...

    • Re-sampling in beach- and sand dune communities at South West Karmøy - 2008. Some comparisons and interpretations. 

      Langåker, Øystein (Master thesis, 2009-06-02)
      Sandy beaches with accompanying immature dunes as well as mature sand dunes are regarded a rare biotope in Norway. The localities of this survey are situated at the south west coast of Karmøy. As a former resident of the ...

    • Reaching towards higher masses of supersymmetric particles decaying to tau leptons 

      Olsen, Agnethe Seim (Master thesis, 2014-06-30)
      This thesis presents an optimisation of the search for SUSY in final states with one tau lepton, jets and missing transverse energy. The SUSY model considered is mSUGRA with the parameter values: A_0 = -2m0, tan(beta) = ...

    • Reaction monitoring using vibrational spectroscopy 

      Hetemi, Dardan (Master thesis, 2012-03-14)
      Reaction monitoring by vibrational spectroscopy (VS), especially NIR spectroscopy, is being increasingly used during process development. Analysts usually use spectroscopy to qualitatively monitor the progress of reactions. ...

    • Reaction monitoring via benchtop nuclear magnetic resonance spectroscopy: A practical comparison of on-line stopped-flow and continuous-flow sampling methods 

      Maschmeyer, Tristan; Russell, David J.; Napolitano, José G.; Hein, Jason Ellis (Journal article; Peer reviewed, 2023)
      The ability for nuclear magnetic resonance (NMR) spectroscopy to provide quantitative, structurally rich information makes this spectroscopic technique an attractive reaction monitoring tool. The practicality of NMR for ...

    • Reaction norm analysis reveals rapid shifts toward delayed maturation in harvested Lake Erie yellow perch (Perca flavescens) 

      Gíslason, Davíð; Heino, Mikko Petteri; Robinson, Beren W.; McLaughlin, Robert B.; Dunlop, Erin S. (Peer reviewed; Journal article, 2019-01-06)
      Harvested marine fish stocks often show a rapid and substantial decline in the age and size at maturation. Such changes can arise from multiple processes including fisheries‐induced evolution, phenotypic plasticity, and ...

    • Reactivation of fractures in subsurface reservoirs - A numerical approach using a static-dynamic friction model 

      Berge, Runar Lie; Berre, Inga; Keilegavlen, Eirik (Chapter; Peer reviewed; Journal article, 2019)
      Fluid-induced slip of fractures is characterized by strong multiphysics couplings. Three physical processes are considered: Flow, rock deformation and fracture deformation. The fractures are represented as lower-dimensional ...

    • Reactive Transport in Porous Media 

      Sævik, Pål Næverlid (Master thesis, 2011-08-01)
      In this thesis, we show how the common equations for flow in porous media can be expanded to account for geochemical reactions. Furthermore, the complications arising when solving the new equations numerically are described ...

    • Reactive transport modelling of hydrate phase transition dynamics in porous media 

      Vafaei, Mohammad Taghi (Doctoral thesis, 2015-03-27)
      Gas hydrate is believed to be so abundant in nature that some estimates suggest it contains more than two times equivalent energy of the whole fossil fuels on Earth. Besides, reservoir hydrates have other important aspects ...

    • Reactive Transport of CO2 in Saline Aquifers with implicit geomechanical analysis 

      Kvamme, Bjørn; Liu, Shunping (Peer reviewed; Journal article, 2009)
      Geological storage of CO2 in saline aquifers is a promising way to reduce the concentration of the greenhouse gas in the atmosphere. Injection of CO2 will, however, lead to dissolution of minerals in regions of lowered pH ...

    • Readout Electronics for the Upgraded ITS Detector in the ALICE Experiment 

      Nesbø, Simon Voigt (Doctoral thesis, 2022-06-03)
      ALICE is undergoing upgrades during the Long Shutdown (LS) 2 of the LHC to improve its performance and capabilities, and to prepare the experiment for the increases in luminosity provided by the LHC in Run 3 and Run 4. One ...

    • “Real-time” genetic monitoring of a commercial fishery on the doorstep of an MPA reveals unique insights into the interaction between coastal and migratory forms of the Atlantic cod 

      Johansen, Torild; Westgaard, Jon-Ivar; Seliussen, Bjørghild Breistein; Nedreaas, Kjell Harald; Dahle, Geir; Glover, Kevin; Kvalsund, Roger; Aglen, Asgeir (Peer reviewed; Journal article, 2017-05)
      With the decline of many of the world’s fisheries, increased regulation, including marine protected areas (MPA), forms an increasingly important role in promoting sustainable resource use. Here, we present a novel “real-time” ...

    • A reappraisal of the H–κ stacking technique: implications for global crustal structure 

      Ogden, CS; Bastow, Ian D; Gilligan, Amy; Rondenay, Stéphane (Journal article; Peer reviewed, 2019)
      H–κ stacking is used routinely to infer crustal thickness and bulk-crustal VP/VS ratio from teleseismic receiver functions. The method assumes that the largest amplitude P-to-S conversions beneath the seismograph station ...

    • Rearing conditions and automated feed distribution systems for zebrafish (Danio rerio) 

      del Veccio, Gianmarco; Mazzei, Aurora; Schiavone, Roberta; Gomes, Ana S.; Frangelli, Giovanni; Sala, Tomasso; Fantino, Stefania; Brocca, Marco G.A.; Barca, Amilcare; Rønnestad, Ivar; Verri, Tiziano (Journal article; Peer reviewed, 2022)
      Zebrafish (Danio rerio) is a well-established animal model, used in a number of research areas. In the last decade, it has also emerged as a tool to evaluate the effects of diets and dietary components and to test novel ...

    • Recalibration of the MEPED Proton Detectors Onboard NOAA POES Satellites 

      Ødegaard, Linn-Kristine Glesnes (Master thesis, 2013-07-04)
      In this thesis we have calibrated energetic proton data from the solid state detectors of the MEPED instrument onboard the satellites NOAA 15, 16, 17, 18, and MetOp 02. All these satellites are part of the NOAA/POES program, ...

    • Recent and future changes of the Arctic sea-ice cover 

      Smedsrud, Lars Henrik; Sorteberg, Asgeir; Kloster, Kjell (Peer reviewed; Journal article, 2008)
      The present and future state of the Arctic sea ice cover is explored using new observations and a coupled one dimensional air–sea–ice model. Updated satellite observations of Fram Strait ice-area export show an increase ...

    • Recent applications and potential of near-term (interannual to decadal) climate predictions 

      O'Kane, Terence J.; Scaife, Adam A.; Kushnir, Yochanan; Brookshaw, Anca; Buontempo, Carlo; Carlin, David; Connell, Richenda K.; Doblas-Reyes, Francisco; Dunstone, Nick; Förster, Kristian; Graça, Antonio; Hobday, Alistair J.; Kitsios, Vassili; van der Laan, Larissa; Lockwood, Julia; Merryfield, William J.; Paxian, Andreas; Payne, Mark R.; Reader, M. Catherine; Saville, Geoffrey R.; Smith, Doug; Solaraju-Murali, Balakrishnan; Caltabiano, Nico; Carman, Jessie; Hawkins, Ed; Keenlyside, Noel Sebastian; Kumar, Arun; Matei, Daniela; Pohlmann, Holger; Power, Scott; Raphael, Marilyn; Sparrow, Michael; Wu, Bo (Journal article; Peer reviewed, 2023)
      Following efforts from leading centres for climate forecasting, sustained routine operational near-term climate predictions (NTCP) are now produced that bridge the gap between seasonal forecasts and climate change projections ...

    • Recent drought and precipitation tendencies in Ethiopia 

      Viste, Ellen Marie; Korecha, Diriba; Sorteberg, Asgeir (Peer reviewed; Journal article, 2013-05)
      In 2011, drought in the Horn of Africa again made news headlines. This study aims to quantify the meteorological component of this and other drought episodes in Ethiopia since 1971. A monthly precipitation data set for 14 ...

    • Recent ecosystem dynamics in nine North African lakes in the CASSARINA Project 

      Birks, Hilary H.; Flower, Roger J.; Peglar, Sylvia M.; Ramdani, Mohammed (Peer reviewed; Journal article, 2001)
      An integrated multi-disciplinary study of nine North African lakes (CASSARINA) aims to establish ecological baselines and to explore responses to 20th century human impacts on their ecosystems. Water chemistry measurements ...