Blar i forfatter "Østvand, Lene"

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    • Academic integrity and the University Library’s role in the doctoral education. 

      Østvand, Lene; Andreassen, Helene N. (Conference object; Konferansebidrag, 2017-04-10)
      Researchers meet an increasing amount of incentives that may lead to scientific misconduct (Edwards & Roy, 2017). A “publish or perish” culture is currently ruling, and quantity is emphasized over quality. Growth in the number of PhD students may lead to growth in competition for grants, future positions and the supervisors’ time. <p>Simultaneously, the PhD students are expected to follow the norms ...

    • Burst statistics of fluctuations in a simple magnetized torus configuration 

      Rypdal, Kristoffer; Živkovic, Tatjana; Østvand, Lene (Working paper; Arbeidsnotat, 2009-04-19)
      In a toroidal plasma confined by a purely toroidal magnetic field the plasma transport is governed by electrostatic turbulence driven by the flute interchange instability on the low-field side of the torus cross section. In this paper we revisit experimental data obtained from the Blaamann torus at the University of Tromso. On time-scales shorter than the poloidal rotation time, the time series of ...

    • For the greater good of science: The place of research data in information literacy teaching for PhD students 

      Andreassen, Helene N.; Østvand, Lene (Conference object; Konferansebidrag, 2016-10)
      In addition to the demanding task of writing a thesis, PhD students face the challenge of balancing the roles as “good scientists” and “good academics”, which in some cases might conflict (Carter, 2015). They are expected to carry out a laborious research project where they are responsible for keeping in line with the norms and values of research ethics, all while building the foundation for their ...

    • Long Range Memory in Time Series of Earth Surface Temperature 

      Østvand, Lene (Doctoral thesis; Doktorgradsavhandling, 2014-05-23)
      Long-range memory (LRM) has been found in numerous natural data records, both in geophysics and other fields. In this thesis LRM in surface temperature time series is studied, and comparison with short-range memory (SRM) models performed. Trends are important in climate studies, but the trend definition is ambiguous. Two different approaches are included here: the trend described as a function ...

    • Long-range memory in Earth's surface temperature on time scales from months to centuries 

      Rypdal, Kristoffer; Østvand, Lene; Rypdal, Martin wibe (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      The paper explores the hypothesis that the temporal global temperature response can be modeled as a long-range memory (LRM) stochastic process characterized by a Hurst exponent 0.5 < H≲1.0 on time scales from months to decades. The LRM is a mathematical representation of the multitude of response times associated with the various subsystems. By analysis of instrumental and reconstructed temperature ...

    • Long-range memory in internal and forced dynamics of millennium-long climate model simulations 

      Østvand, Lene; Nilsen, Tine; Rypdal, Kristoffer; Divine, Dmitry, V.; Rypdal, Martin wibe (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Northern Hemisphere (NH) temperature records from a palaeoclimate reconstruction and a number of millennium-long climate model experiments are investigated for long-range memory (LRM). The models are two Earth system models and two atmosphere–ocean general circulation models. The periodogram, detrended fluctuation analysis and wavelet variance analysis are applied to examine scaling properties ...

    • Multifractals and their application to geospace data 

      Østvand, Lene (Master thesis; Mastergradsoppgave, 2008-06-02)
      In this thesis I first introduce multifractal theory and mathematical concepts for multifractal analysis. Different methods for different uses are described, with focus on a differentiating between coarse and fine theory approaches. Methods for analysing time series are also described, more specificly a direct method based on the coarse theory analysis, the wavelet transform modulus maxima ...

    • Statistical significance of rising and oscillatory trends in global ocean and land temperature in the past 160 years 

      Østvand, Lene; Rypdal, Kristoffer; Rypdal, Martin Wibe (Journal article; Tidsskriftartikkel, 2014-03-20)
      Various interpretations of the notion of a trend in the context of global warming are discussed, contrasting the difference between viewing a trend as the deterministic response to an external forcing and viewing it as a slow variation which can be separated from the background spectral continuum of long-range persistent climate noise. The emphasis in this paper is on the latter notion, and a general ...

    • Statistical significance of rising and oscillatory trends in global ocean and land temperature in the past 160 years 

      Østvand, Lene; Rypdal, Kristoffer; Rypdal, Martin (Journal article; Tidsskriftartikkel, 2014-10-30)
      Various interpretations of the notion of a trend in the context of global warming are discussed, contrasting the difference between viewing a trend as the deterministic response to an external forcing and viewing it as a slow variation which can be separated from the background spectral continuum of long-range persistent climate noise. The emphasis in this paper is on the latter notion, and a ...

    • Støttetenester for forskingsdatahandtering på UiT Noregs arktiske universitet – erfaringar og forslag til beste praksis 

      Conzett, Philipp; Østvand, Lene (Journal article; Tidsskriftartikkel; Peer reviewed, 2018)
      This article describes how support services for research data management have been developed and are run at UiT The Arctic University of Norway (UiT). We go through several areas of interest: technical solutions, researcher involvement, division of work between different units at our institution as well as co-operation with national and international stakeholders, data curation, skills development, ...

    • Støttetenester for forskingsdatahandtering: forslag til beste praksis 

      Østvand, Lene; Conzett, Philipp (Conference object; Konferansebidrag, 2017-06-12)
      Universitetsbiblioteket (UB) ved UiT Noregs arktiske universitet har dei siste tre åra utvikla eit heilskapleg tenestetilbod rundt handtering og tilgjengeleggjering av opne forskingsdata. I tillegg til teknisk infrastruktur for arkivering og deling av opne forskingsdata tilbyr vi opplæring og rådgjeving om korleis forskarar ved UiT bør handtera og arkivera forskingsdataa sine etter beste praksis i ...

    • Take control of your PhD journey: A librarian's perspective 

      Andreassen, Helene N.; Østvand, Lene (Conference object; Konferansebidrag, 2017-04-10)
      PhD students as a library user group are receiving increased focus in the development of library services. In addition to write their doctoral thesis, they need to balance the roles as “good academics" and “good scientists”, and a key element in this respect is raised awareness around academic integrity and publication channels. In this breakout session, based on experiences from our own teaching ...

    • What makes good science? Information literacy seminars as a means to stimulate reflection among PhD students 

      Andreassen, Helene N.; Østvand, Lene (Conference object; Konferansebidrag, 2016-06-02)
      In addition to the demanding task of writing a thesis, PhD students face the challenge of balancing the roles as “good scientists” and “good academics”, which in some cases might conflict (Carter, 2015). They are expected to carry out a laborious research project where they are responsible for keeping in line with the norms and values of research ethics, all while building the foundation for their ...