Browsing Institutt for teknologisystemer by Issue Date

Now showing items 1-20 of 225

  • Hydrogen storage in magnesium hydride doped with niobium pentaoxide and graphite. C. De Piccoli, S. Dal Toè, S. Lo Russo, A. Maddalena, P. Plade, A. Saber, S. Sartori, G. Principi, Chemical Engineering Transactions, Volume 4, (2004), 343-347. 
    Sartori, Sabrina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2004)
  • On the Conductivity of KBaPO4 and Its Decomposition in Steam and Water 
    Elstad, Aleksander A; Nguyen, Kevin; Sartori, Sabrina; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    KBaPO4 – recently reported to hydrate in steam at 80°C into a novel low-temperature protonic conductor – was synthesized by a solid state reaction and its electrical properties characterized by impedance spectroscopy. At ...
  • Modeling of recombination strength at grain boundaries after phosphorus diffusion gettering and the effect of hydrogen passivation 
    Wiig, Marie Syre; Haug, Halvard; Søndenå, Rune; Marstein, Erik Stensrud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We present a method for extracting local recombination rates from photoluminescence images of double side passivated wafers, using simulations of lateral charge carrier diffusion in two dimensions. By fitting the simulated ...
  • Secure detection in quantum key distribution by real-time calibration of receiver 
    Marøy, Øystein; Makarov, Vadim; Skaar, Johannes (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    The single-photon detectionefficiency of the detector unit is crucial for the security of common quantum key distribution protocols like Bennett-Brassard 1984 (BB84). A low value for the efficiency indicates a possible ...
  • Dielectric media considered as vacuum with sources 
    Hågenvik, Hans Olaf; Bløtekjær, Kjell; Skaar, Johannes (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Conventional textbook treatments on electromagnetic wave propagation consider the induced charge and current densities as “bound” and therefore absorb them into a refractive index. In principle, it must also be possible ...
  • Pyplis — A Python software toolbox for the analysis of SO2 camera images for emission rate retrievals from point sources 
    Gliss, Jonas; Stebel, Kerstin; Kylling, Arve; Dinger, Anna Solveig; Sihler, H.; Sudbø, Aasmund (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Ultraviolet (UV) SO2 cameras have become a common tool to measure and monitor SO2 emission rates, mostly from volcanoes but also from anthropogenic sources (e.g., power plants or ships). Over the past decade, the analysis ...
  • Temperature dependent photoluminescence imaging calibrated by photoconductance measurements 
    Haug, Halvard; Søndenå, Rune; Wiig, Marie Syre; Marstein, Erik Stensrud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    In this paper we present a novel method for measuring temperature dependent lifetime images with high spatial resolution using photoconductance calibrated photoluminescence (PL) imaging. In order to achieve this, PL images ...
  • Effect of Al presence and synthesis method on phase composition of the hydrogen absorbing La–Mg–Ni-based compounds 
    Guzik, Matylda N.; Lang, Julien; Huot, Jacques; Sartori, Sabrina (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Results for (La,Mg)Ni3.5 and (La,Mg)(Ni,Al)3.5 systems synthesized by metallurgical and mechanochemical techniques are reported. Powder X-ray and neutron diffraction combined with Rietveld refinements and profile analysis ...
  • RF energy harvesting and information transmission based on NOMA for wireless powered IoT relay systems 
    Rauniyar, Ashish; Engelstad, Paal E.; Østerbø, Olav Norvald (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Amidst the rapid development of the fifth generation (5G) networks, Internet of Things (IoT) is considered as one of the most important part of 5G next generation networks as it can support massive object communications. ...
  • Higher order multipoles in metamaterial homogenization 
    Dirdal, Christopher Andrew; Hågenvik, Hans Olaf; Haave, Haakon Aamodt; Skaar, Johannes (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The higher order multipoles above the electric quadrupole are commonly neglected in metamaterial homogenization. We show that they nevertheless can be significant when the second-order spatial dispersive effects, such as ...
  • Diamagnetism and the dispersion of the magnetic permeability 
    Dirdal, Christopher Andrew; Skaar, Johannes (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    It is well known that the usual Kramers–Kronig relations for the relative permeability function μ(ω) are not compatible with diamagnetism (μ(0) < 1) and a positive imaginary part (Im μ(ω) > 0 for ω > 0). We demonstrate ...
  • Energy Usage Forecasting for LTE: A Network-Wide Traffic Measurements Study 
    Kure, Endre Hegland; Engelstad, Paal E.; Maharjan, Sabita; Gjessing, Stein; Zhang, Xing; Zhang, Yan (Chapter / Bokkapittel / AcceptedVersion; Peer reviewed, 2018)
    Energy usage in LTE base stations are driven by spectral efficiency and traffic. To predict the energy usage these parameters must be forecasted. In this work we analyse hourly measurements collected from more than 12000 ...
  • Space QUEST mission proposal: experimentally testing decoherence due to gravity 
    Joshi, Siddarth Koduru; Pienaar, Jacques; Ralph, Timothy C; Cacciapuoti, Luigi; McCutcheon, Will; Rarity, John; Giggenbach, Dirk; Lim, Jin Gyu; Makarov, Vadim; Fuentes, Ivette; Scheidl, Thomas; Beckert, Erik; Bourennane, Mohamed; Bruschi, David Edward; Cabello, Adán; Capmany, Jose; Carrasco-Casado, Alberto; Diamanti, Eleni; Dušek, Miloslav; Elser, Dominique; Gulinatti, Angelo; Hadfield, Robert H; Jennewein, Thomas; Kaltenbaek, Rainer; Krainak, Michael A; Lo, Hoi-Kwong; Marquardt, Christoph; Milburn, Gerard; Peev, Momtchil; Poppe, Andreas; Pruneri, Valerio; Renner, Renato; Salomon, Christophe; Skaar, Johannes; Solomos, Nikolaos; Stipčević, Mario; Torres, Juan P; Toyoshima, Morio; Villoresi, Paolo; Walmsley, Ian; Weihs, Gregor; Weinfurter, Harald; Zeilinger, Anton; Żukowski, Marek; Ursin, Rupert (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Models of quantum systems on curved space-times lack sufficient experimental verification. Some speculative theories suggest that quantum correlations, such as entanglement, may exhibit different behavior to purely classical ...
  • Methods for Quality Control of Monitoring Data from Commercial PV Systems 
    Øgaard, Mari Benedikte; Haug, Halvard; Selj, Josefine Helene Krogh (Conference object / Konferansebidrag / PublishedVersion, 2018)
    The aim of this work is to develop and test new methods for quality control of data from commercial monitoring systems for small and medium sized PV installations. Such installations often have limited or non-existent ...
  • Health care professionals' attitudes toward, and experiences of using, a culture-sensitive smartphone app for women with gestational diabetes mellitus: Qualitative study 
    Garnweidner-Holme, Lisa; Andersen, Therese; Sando, Mari Wastvedt; Noll, Josef; Lukasse, Mirjam (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Background: The increasing prevalence of gestational diabetes mellitus (GDM) among women of different ethnic backgrounds provides new challenges for health care professionals, who often find it difficult to provide information ...
  • Internet Lite for Sustainable Development 
    Noll, Josef; Mansour, Wisam A.; Holst, Christine; Dixit, Sudhir; Sukums, Felix; Ngowi, Helena; Radovanović, Danica; Mwakapeje, Elibariki; Isabwe, Ghislain Maurice Norbert; Winkler, Andrea Sylvia; Ngowi, Bernard James (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The Digital Divide is one of the key challenges for mankind. Despite attempts to digitally include people, the divide is bigger than ever. This contribution [1] to a sustainable future promotes “Internet lite” as the new ...
  • Towards a Multi-Function Swarm That Adapts to User Preferences 
    Engebråten, Sondre Andreas; Yakimenko, Oleg; Moen, Hans Jonas Fossum; Glette, Kyrre (Chapter / Bokkapittel / PublishedVersion; Peer reviewed, 2018)
    This paper describes the current state of our work towards a multi-function swarm of UAVs that adapts to user preferences. To achieve this, we employ software simulation and an evolutionary search method for offline ...
  • An Incremental Approach for Swift OpenFlow Anomaly Detection 
    Aryan, Ramtin; Yazidi, Anis; Engelstad, Paal E. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Software Defined Networking (SDN) is designed for dynamic policy update where frequent changes are pushed to the forwarding devices. Different offline approaches for detecting misconfiguration anomalies in SDN by taking a ...
  • Stability and Phase Formation in the (Li/Na)6C60–H Systems Studied by Neutron Scattering 
    Sartori, Sabrina; Guzik, Matylda N.; Knudsen, Kenneth Dahl; Sørby, Magnus Helgerud; Teprovich, Jr., Joseph A.; Zidan, Ragaiy; Hauback, Bjørn (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Small-angle neutron scattering combined with powder neutron diffraction was employed to study the phase formation upon absorption/desorption of hydrogen gas in Li- and Na-intercalated fullerides. The comparative system ...
  • Hardware-in-the-loop testing of impedance protection with compensation of fault impedance and DG infeed current 
    Pandakov, Konstantin; Adrah, Charles Mawutor; Liu, Zhou; Hoidalen, Hans Kristian; Kure, Øivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)