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    Wyświetlanie 1-3 z 3
    Tytuł:
    Modeling the impact of surface currents in a harbor using graph theory
    Autorzy:
    Kasyk, L.
    Kowalewski, M.
    Pyrchla, J.
    Kijewska, M.
    Leyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/135565.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    hydrodynamic models
    graph theory
    geographic information system (GIS)
    electronic navigational chart (ENC)
    accident
    Opis:
    Ensuring security in a harbor requires research into its infrastructure using spatial environmental data. This paper presents a methodology that defines the design of a graph for modeling the interactions between surface currents and moving objects. Combining this graph with port charts that integrate electronic navigation charts with coastal orthophotographs allows us to perform a multidimensional analysis. In addition, the complete information about navigation and harbor infrastructure allows us to predict the effects of currents on objects that are moving in the dock. The capabilities of this application were tested in the Gdynia harbor and the defined graph is based on sea currents generated by the numerical hydrodynamic model M3D.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 46 (118); 189-196
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A graphical model to determine the influence of surface currents on small objects immersed in water
    Autorzy:
    Kijewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/135216.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    estimating survivor location
    search survivor movement
    object searching
    search planning
    trajectory prediction
    search and rescue
    graph theory
    hydrodynamic models
    Opis:
    This paper proposes a model of the interactions between surface currents and small, moving objects. These objects are immersed in water so that the part extending above the water is no larger than a human head. These interactions are defined as the weighted-directed graph. The basis for determining the edge weights are the directions of the surface currents. The speeds of these currents are used to calculate the time of moving objects. According to the modelling method of the surface-current influence on small objects, presented in this paper, it is possible to implement an application supporting search-and-rescue-operation planning. This method can be used to locate small objects, such as survivors, when planning search-and-rescue operations. Thus, the routes of these objects moving together with surface-water masses can be predicted using this method.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 47 (119); 170-175
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of the data on the surface currents and wind parameters generated by numerical models on the Szczecin Lagoon area
    Autorzy:
    Kijewska, M.
    Pleskacz, K.
    Kasyk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/117323.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Szczecin Lagoon
    surface current
    wind parameters
    hydrodynamic model
    weather forecast
    numerical models
    Geographic Information System (GIS)
    High Frequency Surface Wave Radar (HFSWR)
    Opis:
    This study focuses on the investigation of available surface currents and wind parameters for employing them in order to predict the survivor movement in the Szczecin Lagoon waters. For this purpose, the surface currents and wind parameters were generated by selected numerical models and the wind parameters were also measured with the telemetry devices. In this paper, the PM3D hydrodynamic model and the NEMS, ECMWF, GFS weather forecast models have been investigated. The measurements of the wind parameters, recorded at the Brama Torowa I and Trzebież stations, were also analyzed. As part of the research, an expert method was used to evaluate the surface currents parameters. In turn, the method based on comparing the forecasted wind parameters with the measured wind parameters was applied in order to assess uncertainties of these parameters. The comparative analyses of the data on the surface currents and wind parameters have been done and probabilistic models for uncertainties of these forecasted parameters have been formulated. Additionally, relations between the surface currents speeds and the wind speeds, in the case when their directions were consistent, have been also discovered.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 729-737
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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