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    Wyświetlanie 1-8 z 8
    Tytuł:
    Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation
    Autorzy:
    Drozd, Kazimierz
    Nieoczym, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/2022491.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    suspended monorail
    dynamic force
    mining auxiliary transportation
    Opis:
    Despite the fact that suspended monorails have been used in the mining industry for over 50 years it is necessary to continue research on the possibilities of increasing the unit mass of the transported load or the speed of people transport. The first step is to establish the exact dynamic load of suspended route’ elements and compare this value with easy to calculation static load. The objective of the research was to determine the influence of speed and direction of travel on maximum load force applied to the sling of the route in mining excavation. The research results indicated that the speed of 2 ms−1 does not significantly influence the load on the sling. Theoretical hypothesis, stating that the estimation of the force value in the sling ought to be performed using projecting on a surface perpendicular to the route was confirmed. It was also proven that in order to characterize the geometry of the sling as well as a precise analysis of its load it is necessary to employ the length and the angle of the chain in relation to the above mentioned surface. Upon employing statistical analysis of the test results, the maximum dynamic effect of the locomotive passing was determined to be 20.1 ± 2.5% of the value of the calculated static load for all slings, projected onto a plane perpendicular to the route. For a single sling, mounted on a test route section inclined at an angle of about 10°, the increase in force due to the passage of the locomotive was up to 21.0% of the static load for this sling.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 1; 266-281
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Polar Code in force
    Kodeks Polarny po wejściu w życie
    Autorzy:
    Głuchowska-Wójcicka, Maja
    Powiązania:
    https://bibliotekanauki.pl/articles/1954467.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Polar Code
    IMO
    Northwest Passage
    Northern Sea Route
    Arctic Shipping
    Arctic council
    Law of the Sea
    Canada
    Russia
    Kodeks Polarny
    Północna Droga Morska
    Przejście Północno-Zachodnie
    Żegluga w Arktyce
    Rada Arktyczna
    Prawo Morza
    Kanada
    Rosja
    Nauki Humanistyczne i Społeczne
    Opis:
    There is a growing interest in new transportation routes that combine benefits of shorter distances, cost-effective transits and routes not troubled by maritime security concerns. The Northwest Passage offers a package of routes through the Canadian maritime zone; it is 9,000 km shorter than the Panama Canal route and 17,000 km shorter than the Cape Horn route. The Northern Sea Route shortens a Hamburg-Yokohama voyage by 4,800 miles, in comparison with the Suez Canal route. The transpolar route, if it materializes with an ice-free Central Arctic Ocean route, would shorten distances even further. Given the increase in regional and international navigation and shipping in the region, it is therefore not surprising that in recent years Arctic States and international bodies focused on the needs of enhanced safety and environmental standards for polar shipping. In addition to the dedicated domestic polar shipping regulation, primarily in Canada and the Russian Federation, the Arctic Council and International Maritime Organization (IMO) have launched important initiatives. The most important is establishing of international rules for ships operating in polar waters- The Polar Code.
    Jednym ze skutków zmian klimatycznych i topnienia lodów arktycznych jest otwarcie nowych szlaków żeglugowych, które skracają drogę z Dalekiego Wschodu do państw basenu północnego Atlantyku nawet o 40%. Transport morski wodami arktycznymi mimo wciąż trudnych warunków nawigacji i komunikacji rozwija się dynamicznie. Brak wystarczających regulacji prawnych dla regionu i duże zagrożenie dla środowiska naturalnego stały się przyczyną do prac nad normami regulującymi żeglugę na obszarach polarnych. Z dniem 1 stycznia 2017 roku w życie wszedł opracowany przez Międzynarodową Organizację Morską Międzynarodowy Kodeks dla Statków Uprawiających Żeglugę na Wodach Polarnych, zwany Kodeksem Polarnym. Celem Kodeksu Polarnego jest zapewnienie bezpieczeństwa i ochrona środowiska morskiego.
    Źródło:
    Prawo Morskie; 2017, XXXIII; 25-36
    0860-7338
    Pojawia się w:
    Prawo Morskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of electric drive tugboat autonomous formation
    Autorzy:
    Koznowski, W.
    Łebkowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201460.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    autonomous tugboat
    electric tugboat
    electric drive
    multiagent system
    tugboat formation
    ship formation
    passage route
    maritime autonomous surface ship
    Opis:
    The automation of maritime transport is an indispensable trend towards full autonomy of maritime vessels. In this paper, an attempt was made to present the control system for port autonomous vessels using an agent system. On the basis of the conducted research, in order to optimize the energy consumption related to the movement of tugboats, the shape of the hull and the shape of the formation in which 4 tugboats are moving were selected. Several scenarios of navigational situations that may take place in port waters have been recognized. The conducted analysis have shown that the optimal shape of the hull of tugboats, the shape of the formation in which they move, as well as the determination of the passage route for the implementation of a specific task, can contribute to reducing both the carbon footprint and the energy consumption of the propulsion systems of tugboats. This is of significant importance in terms of reducing exhaust gas emissions in and around ports.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 391--396
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ice conditions affecting passage of Polish vessels convoy though the NSR in 1956. Long-term ice forecasts and passage strategies
    Autorzy:
    Pastusiak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117507.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    arctic shipping
    ice conditions
    Northern Sea Route (NSR)
    ice forecast
    history of navigation
    passage startegies
    Polish vessels convoy
    ESIMO
    Opis:
    The goal of the study was to examine ice cover conditions that accompanied the passage of convoy of seven Polish vessels from Europe to the Far East in year 1956, which initiated an international commercial shipping transit. Several different sources of information on the state of ice cover in the Arctic were used in this study. Ice conditions (decisive for ability of a merchant vessel or icebreaker to cross the route) during the following navigational seasons in most of the NSR areas showed extremely divergent results - from the most favorable to the most difficult and vice versa. Existing in years 1940-1957 ice cover conditions and shipbuilding technologies did not guarantee a successful transit passage in one navigation season. The Soviet Union used icebreakers that were not able to lead vessels in heavy ice conditions that occurred in 1950s. The NSR Administration used passive strategy ? waiting for improvement of ice conditions - instead of forcing heavy ice. Passive strategy of navigation through the NSR included wintering and continuation of passage next year when ice conditions improved. Annual variability of ice conditions approximated by third degree polynomial line showed trends well. However, the high annual anomalies of ice conditions in relation to trend line did not allow for effective forecasts on particular sections of the NSR in next navigation season.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 101-106
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling navigation, ecologic and economic results of planned voyage of ship on the Northern Sea Route
    Autorzy:
    Pastusiak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201325.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    safety at sea
    Northern Sea Route
    voyage planning
    ship's passage
    arctic navigation
    icebreaker
    modeling
    ship's voyage timetable
    Opis:
    Over the years, many publications have been published on planning ship’s passage through the NSR and input and output data modeling. Results were not considered in terms of errors of modeled output data. Basic research for the years 2008 - 2020 was carried out in the study on opening and closing dates of ice-free transit corridor on the NSR and probable number of tariff zones where paid assistance of icebreakers would be required. Mathematical relationships of average values and probable errors of navigational, ecological and economic ship voyage performance were developed. For this purpose, partial derivatives of functions were used. The outcomes of the study have shown that changes of total average cost of vessel’s transit voyage depends mostly on number of tariff zones where assistance of icebreakers is required. But navigation with icebreakers assistance ensures smaller standard deviation of total voyage time and thus more precise scheduling of ship's voyage timetable through the NSR. The higher probability of meeting requirements set by decision-maker when planning a long-term voyage of ship, the shorter time window for meeting these requirements. Outside the favorable time window, the navigational, ecological and economic results of voyage deteriorate very quickly.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 4; 611--623
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Arctic shipping routes as alternative to the Suez Canal
    Autorzy:
    Pawelski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/24202519.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    arctic maritime transport
    arctic shipping
    Arctic Sea routes
    Northern Sea Route navigation
    Northwest Passage navigation
    polar maritime transport
    Opis:
    The grounding of a 400-meter long container vessel, called Ever Given, in the Suez Canal blocked the busiest shipping lane, which is responsible for 12% of seaborne trade, for 6 days. Some shipping companies had to divert their vessels and they had to take a much longer route around Africa to reach European ports. The concerned shipping industry started to look for alternative sea route to the Suez Canal with lesser risk of blockage, without a need to go around Africa. Such routes, which connect the Pacific and Atlantic Oceans, exist in the Arctic and the warming of the global climate makes them more accessible over time but the assessment of their viability requires a multifaceted analysis based on available professional navigational publications, scientific papers, and knowledge of polar shipping realities. Several nautical aspects are taken into account with the purpose of choosing a polar route that is most suitable as an alternative to the Suez Canal. Three routes are under consideration. One of them is the Northern Sea Route in the eastern part of the Arctic Ocean, along the coast of the Russian Federation. The second route is the Northwest Passage through the western part of the Arctic, passing waters belonging to Greenland, Canada, and the United States. The third one passes near the North Pole, a prospective route that may become available for commercial shipping in the future due to Arctic ice shrinkage, and it is known as the Transpolar Route. Analysis of these routes unambiguously point to the Northern Sea Route as the only viable option. Most prospective alternatives to the Suez Canal are technically feasible with the new generation of cargo vessels and they are experiencing a growth in maritime traffic together with a steady development of associated infrastructure. The existing simplified analyses of the transit costs, assuming strait passage in polar waters without any course deviation and the additional fuel that is burnt to overcome increased friction during passage in ice, shows that under present conditions that the Suez Canal Route is still cheaper than any polar transit and, moreover, offers year-round availability. It cannot be ruled out that the upcoming warming of the Arctic climate, and a lowering of the transit tariffs by the Russian Federation may tip the balance in favor of the Northern Sea Route. Presented here is an analysis of the competitiveness of the Arctic Routes in comparison to the Suez Canal from the perspective of the mariner.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 70 (142); 41--51
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ECDIS Limitations, Data Reliability, Alarm Management and Safety Settings Recommended for Passage Planning and Route Monitoring on VLCC Tankers
    Autorzy:
    Rutkowski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/117179.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Electronic Chart Systems (ECS)
    Electronic Chart Display and Information System (ECDIS)
    ECDIS limitations
    data reliability
    alarm management
    passage planning
    route monitoring
    VLCC tankers
    Opis:
    The purpose and scope of this paper is to describe the factors to consider when determining Electronic Chart Display and Information System (ECDIS) limitation, data reliability, alarm management and ship’s safety parameter settings. For the optimum situational awareness, navigators must always recognize the level of display for objects presented when using ECDIS. The values for the safety depth and safety contour must be understood and entered to achieve a sensible and considered meaning and alarm settings. The navigators must remember that the display of underwater obstructions or isolated danger symbols can change according to the settings of this safety contour which also marks the division between navigable (safe) and non-navigable (unsafe) water. Improper management of the system may result in the anti-grounding alarms and other indications failing to activate as required for the safe conduct of the navigation. Consequently, it could give a false impression of safe waters around the vessel where some dangers may not be shown due to the limitations imposed by original chart scale. This paper recognizes the limitations of ECDIS display, the significance of appropriate safety settings as well as the alarm management recommended for passage planning & route monitoring on VLCC tankers.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 483-490
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Se perdre afin de se retrouver : limportance du passage entre l’absence et la présence dans Œdipe sur la route de Henry Bauchau
    Getting lost to find oneself – significance of the passage between absence and presence in Bauchau’s novel Oedipus on the road
    Autorzy:
    Ślusarska, Alicja
    Powiązania:
    https://bibliotekanauki.pl/articles/483667.pdf
    Data publikacji:
    2012
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Wydawnictwo Werset
    Tematy:
    Belgian novel
    passage
    depersonalization
    lucidity
    Opis:
    Retracing in his novel the labyrinthine journey that leads Oedipus from the place of his abomination (Thebes) to the city of his future glory (Colonus), Henry Bauchau fills the emptiness between Sophocles’s Oedipus the King and Oedipus at Colonus. Bauchau’s hero, a powerful king, loses everything and stabs his eyes out when the cruel truth about his real identity is revealed. Blind, homeless, devoid of meaning of life, Oedipus leaves on a journey to pass away anywhere. However, his way to death turns out to be, thanks to benevolent presence of others and art’s liberating power, the road to personal elucidation. The story of Bauchau’s Oedipus, who finally recognizes himself as a truly human, is based therefore on the passage between absence and presence, between darkness and lucidity, on the union of contradictions which symbolize the complexity of human nature. This paper attempts to analyse different representations of absence in Bauchau’s novel. Afterwards, the article focuses on the ways which facilitate Oedipus’s road leading from depersonalization to rediscovery of his own identity.
    Źródło:
    Quêtes littéraires; 2012, 2; 116-123
    2084-8099
    2657-487X
    Pojawia się w:
    Quêtes littéraires
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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