Blar i Faculty of Mathematics and Natural Sciences på tittel

Viser treff 1635-1654 av 9919

    • Datainnsamling med XForms i Dynamic Presentation Generator 

      Høiland, Morten (Master thesis, 2011-06-01)

    • A dataset of direct observations of sea ice drift and waves in ice 

      Rabault, Jean; Müller, Malte; Voermans, Joey; Brazhnikov, Dmitry; Turnbull, Ian; Marchenko, Aleksey; Biuw, Martin; Nose, Takehiko; Waseda, Takuji; Johansson, Malin; Breivik, Øyvind; Sutherland, Graig; Hole, Lars Robert; Johnson, Mark; Jensen, Atle; Gundersen, Olav; Kristoffersen, Yngve; Babanin, Alexander; Tedesco, Paulina Souza; Christensen, Kai Håkon; Kristiansen, Martin; Hope, Gaute; Kodaira, Tsubasa; Martins de Aguiar, Victor Cesar; Taelman, Catherine Cecilia A; Quigley, Cornelius Patrick; Filchuk, Kirill; Mahoney, Andrew R. (Journal article; Peer reviewed, 2023)
      Variability in sea ice conditions, combined with strong couplings to the atmosphere and the ocean, lead to a broad range of complex sea ice dynamics. More in-situ measurements are needed to better identify the phenomena ...

    • Dawn-dusk asymmetries in the coupled solar wind-magnetosphere-ionosphere system: a review 

      Walsh, Andrew P.; Haaland, Stein; Forsyth, Colin; Keesee, Amy M.; Kissinger, Jennifer; Li, Kun; Runov, Andrei; Soucek, Josef; Walsh, Brian M.; Wing, Simon; Taylor, Matthew G.G.T. (Peer reviewed; Journal article, 2014-07-01)
      Dawn–dusk asymmetries are ubiquitous features of the coupled solar-wind–magnetosphere–ionosphere system. During the last decades, increasing availability of satellite and ground-based measurements has made it possible to ...

    • The Day-to-day Supply Responses of a Limited-entry Mixed Fishery 

      Liu, Xiaozi; Shaw, Daigee; Bjørndal, Trond; Heino, Mikko Petteri (Journal article; Peer reviewed, 2021)
      Small-scale fishers’ short-run supply decisions are understudied, often because of data limitations. We utilize a unique dataset of daily catches and prices from a mixed-species trawl fishery in Taiwan, characterized by ...

    • Dayside and nightside magnetic field responses at 780 km altitude to dayside reconnection 

      Snekvik, Kristian; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Laundal, Karl Magnus; Milan, Stephen Eric; Haaland, Stein (Peer reviewed; Journal article, 2017-02)
      During southward interplanetary magnetic field, dayside reconnection will drive the Dungey cycle in the magnetosphere, which is manifested as a two‐cell convection pattern in the ionosphere. We address the response of the ...

    • Dayside Field-Aligned Current Impacts on Ionospheric Irregularities 

      Follestad, Anna Kristine Fæhn; Herlingshaw, Katie; Ghadjari, Hossein; Knudsen, David J.; McWilliams, Kathryn A.; Moen, Jøran Idar; Spicher, Andres; Wu, Jingjing; Oksavik, Kjellmar (Journal article; Peer reviewed, 2020)
      Global Navigation Satellite Systems (GNSS) are subject to disturbances caused by plasma irregularities in the ionosphere. Studies have suggested that in addition to the gradient drift and Kelvin‐Helmholtz instabilities, ...

    • Dayside Transient Phenomena and Their Impact on the Magnetosphere and Ionosphere 

      Zhang, Hui; Zong, Qiugang; Connor, Hyunju; Delamere, Peter; Facskó, Gábor; Han, Desheng; Hasegawa, Hiroshi; Kallio, Esa; Kis, Árpád; Le, Guan; Lembège, Bertrand; Lin, Yu; Liu, Terry; Oksavik, Kjellmar; Omidi, Nojan; Otto, Antonius; Ren, Jie; Shi, Quanqi; Sibeck, David; Yao, Shutao (Journal article; Peer reviewed, 2022)
      Dayside transients, such as hot flow anomalies, foreshock bubbles, magnetosheath jets, flux transfer events, and surface waves, are frequently observed upstream from the bow shock, in the magnetosheath, and at the magnetopause. ...

    • DCC-GARCH modeller med ulike avhengighetsstrukturer 

      Aardal, Helene (Master thesis, 2013-03-14)
      Hovedfokuset i denne oppgaven er å finne gode metoder for modellering av volatilitet og avhengighetsstruktur i finansielle porteføljer. En spesifikk multivariat GARCH modell, Dynamic Conditional Correlation (DCC-) GARCH, ...

    • De-identification of medical images using object-detection models, generative adversarial networks and perceptual loss 

      Aasen, Malik; Mathisen, Fredrik Fidjestøl (Master thesis, 2021-06-01)
      Medical images play an essential role in the process of diagnostics and detection of a variety of diseases. Whether it being anatomical features or molecular cells, medical imaging help visualize and gain insight into the ...

    • Dealing with uncertainty in ecosystem models along three axes; resolution, forcing and projections 

      Nilsen, Ina (Doctoral thesis, 2023-05-24)
      With the imminent threat of climate change, there is an urgent need to understand how warmer temperatures will affect marine ecosystems. Models provide the best tools to study the future, but although great efforts have ...

    • Deanonymizing communications on The Onion Router (TOR) network with Deep Learning 

      Barstad, Halvard (Master thesis, 2021-06-01)
      Staying anonymous on the Internet is becoming increasingly difficult. Advertisements for services that to some extent offer privacy are frequent, and the general population seems to be more aware of privacy than previously. ...

    • Decadal Changes in Ventilation and Anthropogenic Carbon in the Nordic Seas 

      Jeansson, Emil; Tanhua, Toste; Olsen, Are; Smethie Jr., William M.; Rajasakaren, Balamuralli; Olafsdóttir, Solveig R.; Ólafsson, Jón (Journal article; Peer reviewed, 2023)
      We evaluate the decadal evolution of ventilation and anthropogenic carbon (Cant) in the Nordic Seas between 1982 and the 2010s. Ventilation changes on decadal timescale are identified by evaluating decadal changes in mean ...

    • Decadal Predictability of the North Atlantic Eddy-Driven Jet in Winter 

      Marcheggiani, Andrea; Robson, Jon; Monerie, Paul-Arthur; Bracegirdle, Thomas J.; Smith, Doug (Journal article; Peer reviewed, 2023)
      This paper expands on work showing that the winter North Atlantic Oscillation (NAO) is predictable on decadal timescales to quantify the skill in capturing the North Atlantic eddy-driven jet's location and speed. By focusing ...

    • Decadal prediction of Sahel rainfall: where does the skill (or lack thereof) come from? 

      Mohino, Elsa; Keenlyside, Noel; Pohlmann, Holger (Peer reviewed; Journal article, 2016-12)
      Previous works suggest decadal predictions of Sahel rainfall could be skillful. However, the sources of such skill are still under debate. In addition, previous results are based on short validation periods (i.e. less than ...

    • Decadal solar irradiance variability in northern Europe 

      Parding, Kajsa (Doctoral thesis, 2014-11-28)
      Shortwave (SW) radiation from the Sun is the external energy source on Earth and the fundamental input of energy into the climate system. Variations of the SW radiation and its transfer through the atmosphere can have ...

    • Decadal trends in ocean acidification from the Ocean Weather Station M in the Norwegian Sea 

      Skjelvan, Ingunn; Lauvset, Siv Kari; Johannessen, Truls; Gundersen, Kjell; Skagseth, Øystein (Journal article; Peer reviewed, 2022)
      The Ocean Weather Station M (OWSM) is situated at a fixed position in the Norwegian Sea, one of the major basins of the Nordic Seas, which represents an important area for uptake of atmospheric CO2 as well as deep water ...

    • Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014 

      Müller, Jens Daniel; Gruber, N.; Carter, B.; Feely, R.; Ishii, M.; Lange, N.; Lauvset, Siv Kari; Murata, A.; Olsen, Are; Pérez, F.F.; Sabine, C.; Tanhua, T.; Wanninkhof, R.; Zhu, D. (Journal article; Peer reviewed, 2023)
      The oceanic uptake and resulting storage of the anthropogenic CO2 (Cant) that humans have emitted into the atmosphere moderates climate change. Yet our knowledge about how this uptake and storage has progressed in time ...

    • Decay estimates of Green's matrices for discrete-time linear periodic systems 

      Malyshev, Alexander; Sadkane, M. (Journal article; Peer reviewed, 2023)
      We study periodic Lyapunov matrix equations for a general discrete-time linear periodic system Bpxp−Apxp−1=fp, where the matrix coefficients Bp and Ap can be singular. The block coefficients of the inverse operator of the ...

    • Decay of solitary waves of fractional Korteweg-de Vries type equations 

      Eychenne, Arnaud; Valet, Frederic Fernand Jacques (Journal article; Peer reviewed, 2023)
      We study the solitary waves of fractional Korteweg-de Vries type equations, that are related to the 1- dimensional semi-linear fractional equations: |D|αu + u − f (u) = 0, with α ∈ (0, 2), a prescribed coefficient p∗(α), ...

    • Deciding EA-equivalence via invariants 

      Kaleyski, Nikolay Stoyanov (Journal article; Peer reviewed, 2022)
      We define a family of efficiently computable invariants for (n,m)-functions under EA-equivalence, and observe that, unlike the known invariants such as the differential spectrum, algebraic degree, and extended Walsh spectrum, ...