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    Wyświetlanie 1-7 z 7
    Tytuł:
    A study about the measurement method of the homogeneity of radioactivity along an iridium-192 wire used in brachytherapy
    Autorzy:
    Costa, O. L.
    Calvo, W. A. P.
    Zeituni, C. A.
    Rostelato, M. E. C. M.
    Moura, J. A.
    Feher, A.
    Souza, C. D.
    Somessari, S. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/148238.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    iridium-192
    iridium wire
    low dose rate brachytherapy
    quality control
    cancer treatment
    radioactive sources production
    Opis:
    The Nuclear and Energy Research Institute has produced, since 1998, iridium-192 wires used in low dose rate brachytherapy. In the paper the authors studied the influence of wire profile on the homogeneity distribution of radioactivity of iridium-192 along the wire. The authors propose the improvements in the quality control procedure that will provide more accurate measurement data and suggest changes in control devices.
    Źródło:
    Nukleonika; 2014, 59, 1; 37-39
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The weathering-modified iridium record of a new Cretaceous–Palaeogene site at Lechowka near Chelm, SE Poland, and its palaeobiologic implications
    Autorzy:
    Racki, G.
    Michalski, M.
    Koeberl, C.
    Harasimiuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/20009.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Cretaceous
    geochemical anomaly
    Lechowka n.Chelm
    Paleogene
    Polska
    anomaly
    biostratigraphy
    extinction
    geochemistry
    geological setting
    iridium
    lithology
    paleobiology
    paleontology
    weathering-modified iridium
    Opis:
    In the light of integrated biostratigraphic and geochemical data, a complete shallow−marine succession across the Cretaceous–Palaeogene (K–Pg) boundary, with the critical boundary clay coupled with a burrowed siliceous chalk (“opoka” in Polish geological literature), possibly equivalent of the basal Danian Cerithium Limestone in Denmark, has been discovered at Lechówka near Chełm, SE Poland. An extraterrestrial signature marking the K–Pg boundary is confirmed by anomalously high amounts of iridium (up to 9.8 ppb) and other siderophile elements (especially Au and Ni), as well as by an elevated Ir/Au ratio consistent with a chondrite meteoritic composition. The major positive iridium spike surprisingly occurs in Maastrichtian marls, 10 cm below the boundary clay interval, which can be explained by diagenetic mobilisation and re−concentration of the impact−derived components. Thus, intensively infiltrating, humic acid−rich ground waters during the long−lasting Palaeogene weathering in tropical humid regimes were probably responsible not only for the large−scale decalcification of the Lechówka section, but also for both downward displaced position of the iridium enrichment, a dispersed profile of this anomaly and its significantly lessened value, but still approaching an increase by a factor of 100. This modified record of the K–Pg boundary event points to a careful reconsideration of the iridium anomaly as a trustworthy marker for studying the extinction patterns across the K–Pg boundary, as supported by the recent data from New Jersey, USA.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and production of radioactive sources used for cancer treatment in Brazil
    Autorzy:
    Rostelato, M. E. C. M.
    Rela, P. R.
    Zeituni, C. A.
    Feher, A.
    Manzoli, J. E.
    Moura, J. A.
    Moura, E. S.
    Silva, C. P. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/148305.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radioactive sources production
    iodine-125 seeds
    iridium-192 wires
    brachytherapy
    cancer treatment
    Opis:
    The number of cancer patients in Brazil is increasing and part of the patients are submitted to brachytherapy treatment using iridium-192 wire and iodine-125 radioactive seeds. The Nuclear Energy Research Institute established a programme to produce iridium-192 wire and iodine-125 radioactive seeds. With the purpose of settling a laboratory for iridium-192 sources production, a wire activation method was developed and a hot cell for the wire manipulation, quality assurance and packaging was built. The iodine-125 seeds consist of a welded titanium capsule containing iodine-125 adsorbed onto a silver rod. Concerning the setup of the local production, the following activities were carried out: superficial treatment of the silver rod, development of a process to absorb the iodine in the silver rod, welding methodology to seal the seeds, leakage and contamination test and source activity measurement.
    Źródło:
    Nukleonika; 2008, 53, suppl. 2; 99-103
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occurrence of platinum group metals in the environment and their use
    Występowanie platynowców w środowisku i ich zastosowanie
    Autorzy:
    Trębacz, H.
    Michno, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/402100.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
    Tematy:
    platinum group metals
    platinum
    palladium
    rod
    osmium
    ruthenium
    iridium
    platynowce
    platyna
    pallad
    osm
    ruten
    iryd
    Opis:
    Monoliths that are part of the automotive catalysts include noble metals: platinum, palladium and rhodium, which acts as a catalyst. During the operation of these devices platinum group elements (PGE) are released into the environment. The characteristics of individual metals belonging to the platinum group are presented in this article. These metals can be found in road sediments as well as in water or food. Platinum resources are constantly shrinking, so one of the ideas is their exploitation from the solar system. This article also presents methods of platinum recovery. The publication provides an overview of the literature on platinum-related issues.
    Monolity, które są częścią katalizatorów samochodowych, zawierają metale szlachetne: platynę, pallad i rod, które pełnią funkcję katalityczne. W trakcie eksploatacji tych urządzeń następuje emisja platynowców do środowiska. Przedstawiono charakterystykę poszczególnych platynowców. Metale te możemy odnaleźć w osadach drogowych, jak i w wodzie czy żywności. Zasoby platynowców stale się kurczą, dlatego jednym z pomysłów jest ich eksploatacja z Układu Słonecznego. Zaprezentowano również metody odzysku platynowców. W publikacji przedstawiono przegląd literatury dotyczącej zagadnień związanej z platynowcami.
    Źródło:
    Structure and Environment; 2017, 9, 4; 283-298
    2081-1500
    Pojawia się w:
    Structure and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of the multifunctional communication system for RIS center supporting Inland Navigation
    Autorzy:
    Lisaj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2063977.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    River Information System
    Iridium Satellite System
    RIS Center
    Multifunctional Communication System
    GMDSS
    DSC Communication
    Search and Rescue
    Opis:
    The article presents the feasibility of implementation integrated digital and analog radio-communications systems in maritime and inland navigation at the RIS Center. Structure of the date transmission in the RIS system was characterized. Integration of the Iridium Satellite System into a Multifunctional Communication System for the RIS Centre was presented. The integrating DSC VHF and DSC MF GMDSS subsystems with Multifunctional Communication System was presented. The possibilities of integrating The LT- 3100S Lars Thrane module for Multifunctional Communication System. was presented. The architecture of Multifunctional Communication Systems implementing distress communication procedures in cooperation between RIS Center and Search and Rescue Centers was presented.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 605--608
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Key points of the modernized GMDSS system
    Autorzy:
    Korcz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201457.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    e-navigation solutions
    GMDSS modernization
    GMDSS equipment
    navigational data
    VHF data exchange system
    IRIDIUM satellite system
    world radiocommunication conference
    Opis:
    The article presents the reasons and the entire process of work on the modernization of the GMDSS system. The main legal and technical aspects of the modernization of the GMDSS system were discussed as well. New devices and systems of the modernized GMDSS system were described. On the basis of the key points of the modernized GMDSS, an attempt was made to evaluate the entire project.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 139--146
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Functionality of Sea Ice Data Sources on the NSR
    Autorzy:
    Pastusiak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117634.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Northern Sea Route
    e-Navigation
    sea ice data source
    ISM Code
    ice navigation
    IRIDIUM Satellite System
    arctic area
    ice certificate
    Opis:
    The functionality of available official sources of sea ice data for the Northern Sea Route to date is low. In recent years a large number of new publicly available sources have appeared. Their functionality for purposes of route planning has yet to be evaluated. This study presents results of qualitative and expert analyses of various sources. It is proposed to use new indicators to enable comparison of functionality of data sources. New sources provide the technical progress that is instrumental in reducing the amount of effort and influence of the human factor in the decision-making system. The study also presents solutions to the problem of limited bandwidth available at high latitudes with Iridium satellite system. Presented solutions can be used on any vessel by any company or navigator to implement or design the decision support system related to route planning in ice in accordance with the requirements of the ISM Code and concept of e-Navigation.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 441-450
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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