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    Wyświetlanie 1-9 z 9
    Tytuł:
    Two-frequencies bathymetry of Plitvice Lakes
    Autorzy:
    Pribicevic, B.
    Medak, D.
    Dapo, A.
    Medved, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/224493.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    batymetria
    pomiary hydrograficzne
    jeziora
    bathymetry
    hydrographic survey
    lakes
    Opis:
    Faculty of Geodesy, University of Zagreb, recently acquired the latest technology for performing the precise hydrographic surveying. The equipment consists of ATLAS DESO 14 surveying echosounder with two transducers: one with high frequency (210 kHz) and second with low frequency (33 kHz). The position of the transducer is determined with Real Time Kinematics GPS pair of Trimble R8 receivers. Thus, it is possible to use single-frequency DESO 14 for two-frequencies bathymetry through repeating the course of the vessel on exactly the same points with both transducers. The results of the application of this method in measuring two lakes in the National Park Plitvice Lakes are shown in this paper.
    Źródło:
    Reports on Geodesy; 2006, z. 1/76; 99-102
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Solution of Solid Charge Direct Resistance Heating with Similarity Theory
    Autorzy:
    Novák, P.
    Janoščík, J.
    Medved, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/262620.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    direct resistance heating
    conductive charge
    electrocontact heating
    temeperature and electromagetic fields
    method of variable separation
    method of final differences
    criteria of similarity
    Opis:
    The place of generation of technologic heat is important applied criteria for classification of electric heating. According to that, the direct heating is if the heat is generated directly in the heated material, or the indirect heating if material is heated indirectly by the heat generated in conversion element. Possibilities of practical application of both methods are typical for resistant heating. Considering indirect heating, the charge is out of influence of electromagnetic field, this directly does not influence its temperature field. Temperature distribution in the charge volume depends only on its heat-physical properties and conditions of heat exchange on surface, i.e. thermo kinetic processes. Fourier's equation is applied in field solution. Considering direct heating, temperature distribution in the charge volume is more complicated. It is conditioned by interaction of temperature and electromagnetic field which is generated by the current flowing in the charge. Solution of temperature field in directly heated charge must for that reason respect current density distribution on its cross-section, this leads to applying of heat conduction equation. We introduce its application for different types of temperature fields in the solid charge in this article. We present solution by two methods, results are presented in criteria (no dimensional) form.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 9-15
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multiple criteria analysis of Spatial information for a preliminary assessment of the landslide Susceptibility for environmental protection in the Zagreb Region based on geodynamic network
    Autorzy:
    Medved, I.
    Medak, D.
    Pribicević, B.
    Dapo, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/224919.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    system informacji przestrzennej
    Spatial Information System
    Opis:
    'Land' plays multidimensional role in maintaining many global processes, therefore sustainable planning and management of land resources is an important issue at the global forum. The process of land resource planning and associated decision-making invariably involves multiple objectives, multiple criteria and multiple social interests and preferences. Such complexity necessitates a systematic approach to the decision-making process to accommodate the multiplicity and multi dimensionalities of the problem to improve the reasonability of decisions and to justify the actions to be taken. The objective of this study is to perform a preliminary assessment of the landslide susceptibility for enviroment protection in the City of Zagreb. A geographic information system (GIS) database was compiled based on data from topographical and geological maps. Weight of evidence, analytic hierarchy process (AHP), and fuzzy logic methods, as well as hybrid methods, were used to establish the rating of classed for each factor, weigting for the factors, and to combine multiple factor layers into landslide-susceptibility maps. The results recognize relative weights between the influential factors and promote the real efficiency on City of Zagreb hillsides disaster can be important references for establishing the evaluation model.
    Źródło:
    Reports on Geodesy; 2011, z. 2/91; 37-42
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Electromagnetic Shield on the High Frequency Electromagnetic Field Penetration through the Building Material
    Autorzy:
    Kolcunová, I.
    Pavlík, M.
    Beňa, L'.
    Čonka, Z.
    Ilenin, S.
    Kanálik, M.
    Kolcun, M.
    Mészáros, A.
    Medveď, D.
    Zbojovský, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032736.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.20.Gz
    Opis:
    This paper studies how to protect people against electromagnetic radiation inside a building. Widespread usage of the mobile communication led to building of more and more new GSM base-station antennas. These antennas are often placed in the areas with high population density. These antennas emit electromagnetic radiation in standard mobile operator frequencies, i.e. 0.9, 1.8 and 2.1 GHz. Many studies have shown potential biological and thermal effects of GSM electromagnetic fields, therefore people are concerned about their health. Electromagnetic wave does not penetrate the wall of the building as a whole. A small part of the wave is reflected and a small part is absorbed by the building material. In this paper the penetration of electromagnetic waves through the commercially available building materials is measured with specific focus on frequencies of 0.9, 1.8, and 2.1 GHz. Next, the surface of the chosen building material was coated with a magnetic conductive paint in order to improve the shielding effect of the building material. The results of experiment show how the electromagnetic shield reduces the penetration of electromagnetic waves through the building wall.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1135-1137
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Five years of EUREF-permanent GPS-stations in Croatia
    Autorzy:
    Medak, D.
    Pribicevic, B.
    Dapo, A.
    Medved, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/224509.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    GPS
    system wyznaczania współrzędnych
    system pozycjonowania obiektów
    stacje trwałe
    Chorwacja
    sieć geodynamiczna
    Global Positioning System
    permanent stations
    Croatia
    geodynamics network
    Opis:
    In October 2000, the Faculty of Geodesy, University of Zagreb, with the support o German Federal Agency for Cartography and Geodesy (BKG) and Croatian State Geodetic Administration, established two permanent GPS-stations: one in Dubrovnik and another one in Osijek. The stations became the part of large global network International GPS Service for Geodynamics (IGS), ie. the part of EUREF/Permanent project. This paper describes the background for the choice of locations, stabilization and precise measurements of local GPS-networks that connected the stations with EUREF/CROREF points nearby. The problems in the maintenance of the stations have been described as welI. A view on the perspective of permanent GPS-services in Croatia is given, too.
    Źródło:
    Reports on Geodesy; 2006, z. 1/76; 91-97
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Final Report on research activities within the project CERGOP2/Environment in Croatia
    Autorzy:
    Medak, D.
    Pribicevic, B.
    Prelogovic, E.
    Dapo, A.
    Medved, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/224501.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    CERGOP
    CEGRN
    geodynamika
    pomiary geodynamiczne
    GPS
    system pozycjonowania obiektów
    Chorwacja
    geodynamics
    geodynamic measurements
    Croatia
    Opis:
    Researchers from the Faculty of Geodesy, University of Zagreb, organized and performed various research activities within the project CERGOP2/Environment. The participation in both CEGRN campaigns was ensured with two epoch stations: Brusnik and Hvar. Activities related to the working package 10.4: International geodynamic test area Plitvice Lakes included several hydrographic measurements with the combination of GPS positioning and echosounder bathymetry. Repeated measurements with two frequencies yielded new insight about the sediments on the lake bottom. A structural map of the Lakes has been prepared, too. Geodynamic measurements has been performed on several special points. The foundation for future permanent station in the area of the Plitvice Lakes has been prepared.
    Źródło:
    Reports on Geodesy; 2006, z. 1/76; 81-84
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conceptual model of geotechnical information system
    Autorzy:
    Medved, I.
    Medak, D.
    Pribičević, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/224689.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    informacja geotechniczna
    dane przestrzenne
    bazy danych
    geotechnical information
    spatial data
    database
    Opis:
    Geological, geodynamical and hydrological research in Zagreb area resulted in several spatial data of different lineage, coordinate systems and resolution. The goal of this paper is the gathering of data in a unique geotechnical information system, which will br the basis for further analysis. We are using ArcGIS modules for spatial and geostatistical analysis. Geotechnical information systems can be used to prevent, mitigate and alleviate damage caused by the natural disasters such as eartquakes and landslides. However, the geotechnical data bases have not been utilized extensively. Examples of using the data bases this chapter for seismic hazards assessment, planning for new structures, ground water hydrology, disaster mitigation systems of gas pipelines, and infrastructure management systems are presented.
    Źródło:
    Reports on Geodesy; 2009, z. 1/86; 111-114
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of 3D terrestrial laser scanning in geodynamic monitoring
    Autorzy:
    Medak, D.
    Pribičević, B.
    Medved, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/225098.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    pomiary GPS
    skanowanie laserowe
    skanowanie 3D
    Zagrzeb
    GPS measurements
    laser scanning
    3D scanning
    Zagreb
    Opis:
    During last 10 years, geodesists from the Faculty of Geodesy, University of Zagreb, together with geologists and tectonicians established and performed a number of series of GPS-measurements on the Geodynamic Network of the City of Zagreb. The results of these campaigns emphasized the spots with higher level of geodynamic activity, resulting in damages on objects: houses, walls, churches. Therefore, the technology of threedimensional laser scanning has been employed in order to capture much more detailed picture of fast movements. In the first experimental phase of the project, only rapidly sliding areas are observed. The main hypothesis of proposed research is to check if the technology of precise laser scanning is able to produce comparable point clouds showing the movements of objects in the field. As an additional source of information, this research should contribute to the better understanding of the processes below the Earth surface.
    Źródło:
    Reports on Geodesy; 2008, z. 1/84; 49-53
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Additional Modification of Thermomagnetic Properties of Objects of Low Relative Permeability in Electromagnetic Field
    Autorzy:
    Medveď, D.
    Zbojovský, J.
    Pavlík, M.
    Ilenin, S.
    Čonka, Zs.
    Kanálik, M.
    Kolcunová, I.
    Mészáros, A.
    Beňa, L.
    Kolcun, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032188.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    44.05.+e
    Opis:
    This paper presents the characteristics of the foodstuff heating phenomenon using induction heating process by an induction cooker. The simulation setup was prepared according to the proposed magnetic material and configuration of the pot and induction cooker. The material properties of pot were varied among the several alternatives. The helical coil was designed on the base of the limitation of the induction cooker size and given number of coil turns and coil tube diameter with specific supplied electric current density. The data from the simulation analysis have to determine the enhancing of the highest heat transfer from induction cooker into pot. These data led to the modification of the material and geometrical properties of the pot in accordance to a minimum heating time and enhanced safety operation, especially close to unshielded magnetic objects.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1138-1140
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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