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Wyszukujesz frazę "Hansen, W." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Charge and Spin Transport in a Metal-Semiconductor Heterostructure with Double Schottky Barriers
    Autorzy:
    Wolski, S.
    Jasiukiewicz, C.
    Dugaev, V.
    Barnaś, J.
    Slobodskyy, T.
    Hansen, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386690.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.30.+y
    73.40.-c
    75.76.+j
    Opis:
    Taking into account the available experimental results, we model the electronic properties and current-voltage characteristics of a ferromagnet-semiconductor junction. The Fe/GaAs interface is considered as a Fe/(i-GaAs)/n⁺-GaAs/n-GaAs multilayer structure with the Schottky barrier. We also calculate numerically the current-voltage characteristics of a double-Schottky-barrier structure Fe/GaAs/Fe, which are in agreement with available experimental data. For this structure, we have estimated the spin current in the GaAs layer, which characterizes spin injection from the ferromagnet to the semiconductor.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 472-474
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Next generation of physics-based system for port planning and efficient operation
    Autorzy:
    Mortensen, S. B.
    Harkin, A.
    Kofoed-Hansen, H.
    Mlaś, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/116540.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    port operations
    efficient operation
    port planning
    under keel clearance (UKC)
    full mission bridge simulator (FMBS)
    force technology
    traffic management system
    port traffic flow
    Opis:
    The continuing surge in commercial vessel sizes is putting increasing pressures on the world’s port authorities to adopt effective expansion strategies to ensure that their asset is able to meet growing capacity demands. Among the key challenges is to assure that correct strategic planning and operational measures are adopted to guarantee safe and efficient traffic not only through its shipping channel, but also at the port berthing facilities. DHI and FORCE TECHNOLOGY have collaborated to develop a novel physics-based vessel traffic management system named NCOS ONLINE. It is capable of taking into account of any relevant vessel constraints such as under-keel clearance (UKC), maneuverability and berth configuration that may constrict the movement of vessels through the channel or operability at berth, facilitating scenario planning and capacity assessment of proven unparalleled accuracy. The system incorporates the accuracy of high-end Full Mission Bridge Simulators with regards to vessel response under power and at berth. The underlying computational engines uses a powerful 3D panel method for vessel response calculations in combination with highly detailed environmental data such as wind, waves and hydrodynamics (water level and currents) simulated by use of MIKE Powered by DHI’s recognized and scientific based computational models. The modular and integrated framework-based system has already been adopted by numerous port authorities, terminal operators and pilots worldwide for strategic port planning, design and 24/7 operational vessel traffic management. The paper focus on presenting the underlying equational framework and validation of the underlying physical response engines and provide a brief introduction to how they are integrated and operated through a series of user-friendly web dashboards.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 99-105
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Healed or non-healed? Computed tomography (CT) visualisation of morphology of bite trace ichnotaxa on a dinosaur bone
    Autorzy:
    Jacobsen, A. R.
    Lauridsen, H.
    Fiirgaard, B.
    Boel, L. W. T.
    Hansen, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/191178.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Bite traces
    dinosaur bone
    theropod
    CT
    computed tomography
    stereomicroscopy
    Opis:
    Bite traces on fossilised bones can provide important information on predator-prey relations and interactions in ancient environments. In 2009, two new ichnotaxa, Linichnus serratus and Knethichnus parallelum, were introduced to develop the application of bite traces as an ichnological tool. Ichnotaxa defined by theropod bite traces can provide useful information for understanding feeding behaviour. However, objective interpretation of possible bite traces can be difficult using traditional visual inspection. In this study, the bite traces on a fossilised dinosaur bone were comprehensively examined by correlating traditional naked-eye in spection with computed tomography (CT) imaging, used to visualise the internal morphology of the bite traces and in particular, to clarify the appearance of one possibly healed bite trace. A forensic pathologist visually examined the bone with the aid of stereomicroscopy and a radiologist analysed the CT scans. Sixteen different scanner settings were used to optimise the CT parameters and avoid signal at tenuation, in the form of hypointense artefacts in the central trabeculated part of the bone fragment. The use of CT scanning provided information on internal morphology from the vicinity of the bite trace, including hyperdense zones, not identified using visual inspection alone. By applying the extended CT scale, the dense and radiopaque cortical bone layer could be clearly identified and applied as a pathomorphological marker to correctly distinguish non-healed from healed wounds. In conclusion, the authors demonstrate that external visual examination of trace fossils by ichnologists in combination with interior examination using CT imaging can be applied to characterise ichnotaxa defined by bite traces and potentially provide clues on ancient feeding behaviour.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 3; 457-464
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rock glaciers in the Jutulsessen, Dronning Maud Land, East Antarctica
    Autorzy:
    Rudolph, Elizabeth M.
    Meiklejohn, K. Ian
    Hansen, Christel D.
    Hedding, David W.
    Nel, Werner
    Powiązania:
    https://bibliotekanauki.pl/articles/2042133.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    East Antarctica
    Jutulsessen
    rock glacier
    permafrost
    climate change
    Źródło:
    Polish Polar Research; 2018, 39, 1; 1-17
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Warm waters of summer 2002 in the deep Baltic Proper
    Autorzy:
    Feistel, R.
    Nausch, G.
    Mohrholz, V.
    Lysiak-Pastuszak, E.
    Seifert, T.
    Matthaus, W.
    Kruger, S.
    Hansen, I.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/47540.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    temperature
    hydrography
    inflow
    warm water
    summer
    salinity
    Baltic Sea
    oxygen condition
    Opis:
    From October 2002 until March 2003 surprisingly warm, oxygenated waters were frequently encountered in the Baltic Sea in the area between the Bornholm and Fårö Deeps from the halocline down to the bottom. Owing to their ventilation effect in the stagnating deep waters, their occasional observations have partly been incorrectly attributed to the inflow events of October 2002 or January 2003. The emergence of some of these waters can be traced back to the exceptional summer weather conditions in August and September 2002 in central Europe. The warm waters played a remarkable renewal pacemaker role for the subsequent important winter inflow of January 2003. The evolution of this summer inflow is described and possible causes are discussed.
    Źródło:
    Oceanologia; 2003, 45, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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