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Wyświetlanie 1-15 z 43
Tytuł:
A COLREGs-compliant decision support tool to prevent collisions at sea
Autorzy:
Martelli, M.
Žuškin, S.
Zaccone, R.
Rudan, I.
Powiązania:
https://bibliotekanauki.pl/articles/24201449.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
analysis of ship collision
collision avoidance
collision avoidance decision making
collision avoidance system
anti-collision maneuvering
autonomous control unit
autonomous ship
autonomous navigation system
Opis:
Groundings and collisions still represent the highest percentage of marine accidents despite the current attention on Maritime Education and Training and the improvement of sensor capability. Most of the time, a collision is caused by a human error with consequences ranging from moderate to severe, with a substantial impact on both environment and life safeguarded at sea. In this paper, a brief statistical data regarding human element as a root cause of marine incidents together with collision regulations misunderstanding is presented as a background chapter. Furthermore, the present work discusses a decision support system architecture to suggest an appropriate action when the risk of a potential collision is detected. The proposed architecture system is based on various modules integrated with proper sensor input data regarding the surrounding navigation area. As a result, the tool can support the Officers of Watch in the decision-making process providing an early suggestion in compliance with the COLlision REGulations. The proposed system is intended to be used onboard independently from the degree of automation of the ship, and it is based on AIS, which is mandatory, making it widely applicable. The proper use of the system can considerably reduce the number of collisions, as demonstrated by the obtained results.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 347--353
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A ship manoeuvring desktop simulator for developing and validating automatic control algorithms
Autorzy:
He, H.
Lataire, E.
Zwijnsvoorde, T. V.
Powiązania:
https://bibliotekanauki.pl/articles/24201421.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
automatic control
optimal tracking algorithms
manoeuvring simulator
anti-collision maneuvering
autonomous ship controller
model predictive control
waypoint path controller
authonomy of ships
Opis:
This paper presents a user‐friendly simulator developed based on Windows Forms and deployed as a test bed for validating automatic control algorithms. The effectiveness of some of the integrated track controllers has been tested with free running experiments carried out in the Towing Tank for Manoeuvres in Shallow Water in Ostend, Belgium. The controllers enable a ship to follow predefined random paths with high accuracy. Ship‐to‐ship interaction is considered in some cases. Simulator environments provide useful tools for extending the number of validation scenarios, supplementing the work performed in the towing tank. The simulator is presented with a graphical user interface, aiming at providing a good user experience, numerous test scenarios and an extensively‐validated library of automatic control algorithms. With the usage of the simulator, further evaluation of developed control algorithms by implementing extensive test runs with different ships and waterways could be made. Case studies are shown to illustrate the functionality of the simulator.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 3; 607--616
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ad hominem and false analogy abuses in a Romanian intellectual debate
Autorzy:
Pănoiu, Valeriu-Mihai
Powiązania:
https://bibliotekanauki.pl/articles/2188251.pdf
Data publikacji:
2022-10-24
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie. Instytut Filozofii i Socjologii
Tematy:
pragma-dialectics
argumentation
strategic maneuvering
fallacies
status groups
Opis:
A pragma-dialectical inside view of a Romanian intellectual debate is meant to unveil strategic maneuvering and fallacies, in a public sphere said to be dominated by “status groups”, “backstage maneuvers” and “conspiracy”. A book written by a Romanian author sparked off an area of disagreement leading to ad hominem attacks and false analogies ranging from postcommunist issues to political correctness.
Źródło:
ARGUMENT: Biannual Philosophical Journal; 2022, 12, 1; 59-74
2083-6635
2084-1043
Pojawia się w:
ARGUMENT: Biannual Philosophical Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithms and calculation scheme for planning the way of movement of trajectory point during maneuvering for anchoring
Autorzy:
Surinov, I.
Powiązania:
https://bibliotekanauki.pl/articles/2063956.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
algorithms for planning ships trajectories
planning the way of movement
algorithms
maneuvering for anchoring
route planning
ship’s trajectory planning
algorithms for ships trajectories
trajectory planning
Opis:
The analysis of the historical aspect of the development of the maneuvering during anchoring shows that during the movement there is no time to control the position by technical means, due to the speed of the process of changing the parameters of movement. The main purpose of this research is to modify the methodological basis for the preparation of flight planning during anchoring with increased accuracy to determine the coordinates along which the ship will move. The methodology of this work is based on the calculation of trajectory points of the path in combination with the method of segments on the map using the characteristics of the maneuverability of the vessel. The method is based on determining the coordinate matrices of rectilinear and curvilinear sections through which the vessel passes during maneuvering for anchoring. The calculation program is developed in Excel, and allows without the help of a micro calculator that takes into account the maneuverability of the vessel in the automatic system. Thus, the control of the center of gravity of the vessel relative to a given path line is performed. A high-precision system for automatic determination of planned coordinates by trajectory points on track and traffic control during anchoring has been developed, which is based on recently developed algorithms, calculation schemes and methods at the Maritime University, which are based on the latest meaningful models of high-precision planning movement on them. This approach automates the process of controlling safe traffic, including the use of decision support systems, including stranding prevention and collisions with other vessels. The results of the research can be used on a ship for automated planning of coordinates on waypoints and control of traffic on them for safe maneuvering, as well as for training navigators on specialized simulators to perform trajectory planning, including limited conditions.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 629--638
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of basic parameters of Ro-Pax ferries in the Baltic Sea as guidelines for its preliminary design
Autorzy:
Gucma, L.
Raczkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/259872.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Ro-Pax ferry
ship design
ferry traffic
operating parameters
maneuvering parameters
analysis of ship dimensions
Opis:
This paper presents results of an analysis of the operating and maneuvering parameters (length, width, draft, main propulsion power and maneuvering equipment, and windage area) of the Ro-Pax ferries over 150m in length. The analysis takes into accounts all ferries operating in the Baltic Sea in 2017. The work also includes route analysis of the collected Ro-Pax units. The influence of port infrastructure is also discussed. The mean optimal Baltic Sea Ro-Pax ferry and its parameters for short term and long term forecasts are presented. This paper may be used as a primary guideline for the determining the optimal Ro-Pax ferry dimensions size for the Baltic lines in terms of preliminary ship design.
Źródło:
Polish Maritime Research; 2018, 3; 44-53
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza błędów metody rzeczywistej wyznaczania bezpiecznego obszaru manewrowego statków
Error Analysis of the Method of Determining the Safe Manoeuvring Area for Vessels
Autorzy:
Montewka, J.
Powiązania:
https://bibliotekanauki.pl/articles/906712.pdf
Data publikacji:
2004
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
bezpieczny obszar manewrowy
błędy metod kształtowania dróg wodnych
pomiary laserowe
inżynieria ruchu morskiego
safety maneuvering area
errors of methods of determining waterways parameters
laser rangefinder measuremen
marine traffic engineering
Opis:
W referacie przedstawiono szczegółową analizę błędów metody rzeczywistej wyznaczania bezpiecznego akwenu manewrowego statku w płaszczyźnie poziomej opartej na pomiarach wykonanych dalmierzami laserowymi oraz propozycje pewnych rozwiązań mające na celu zwiększenie ich dokładności.
The article presents the error analysis of the method of determination the horizontal dimensions of safety maneuvering area for vessels, based on laser measurements. Some solutions of reducing these errors have been suggested as well.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 3 (75); 91-102
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bezpieczeństwo zbiornikowców LNG manewrujących na akwenach ograniczonych
Safety of LNG carriers manouvering in limited areas
Autorzy:
Adamkiewicz, A.
Anczykowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/112761.pdf
Data publikacji:
2017
Wydawca:
STE GROUP
Tematy:
bezpieczeństwo
zbiornikowiec
układ napędowy
manewrowanie
terminal LNG
safety
LNG carrier
power system
maneuvering
LNG terminal
Opis:
W artykule przedstawiono stan floty zbiornikowców LNG przewidywanych do obsługi terminala LNG, w tym z uwzględnieniem autoryzacji gazowca dla zapewnienia bezpieczeństwa żeglugi na obszarach ograniczonych. Rozpoznano przesłanki zagrożenia bezpieczeństwa statku na ograniczonej drodze wodnej, właściwości żeglugi zbiornikowców na akwenie terminalu oraz wpływ rodzaju głównego układu napędowego na cechy funkcjonalne gazowca. Na takim tle zdefiniowano wskaźniki bezpieczeństwa eksploatacji zbiornikowców jako narzędzi do oceny rodzaju napędu statku w aspekcie bezpiecznego wykonania zadania transportowego.
The paper presents status of the LNG carrier fleet envisaged for serving an LNG terminal and it includes LNG carrier authorization to ensure sailing safety in restricted areas. It studies potential safety risks for ships in a restricted waterway, characteristics of LNG carrier sailing in terminal water areas and the influence of the main power system type on functional properties of an LNG carrier. With that background safety indicators for safe LNG tanker operation have been defined as a tool to evaluate the type of ship power system in the aspect of its safe transportation task performance.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 7; 11-20
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Confrontational Argumentative Strategies in the Discourse of Foreign Policy Experts
Autorzy:
Allani, Samira
Powiązania:
https://bibliotekanauki.pl/articles/1026728.pdf
Data publikacji:
2019-03-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
argumentation
discourse
experts
foreign policy
strategic maneuvering
Opis:
The aim of this study is to explore the discursive practices of foreign policy experts. While policy decisions involving war and peace keep people alarmed all over the globe, most of these decisions are shaped by policy experts who work on influencing public opinion through the media (Manheim, 2011). This study adopts a critical discursive stance and uses argumentation analysis to examine the ideological backdrop to the discourse of thirty opinion articles authored by American foreign policy experts in print media. Drawing on the Pragma-dialectical method of augmentation analysis (van Eemeren and Grootendorst, 2004), and more particularly on its notion of strategic maneuvering, the analysis examines the confrontational strategies used by this group of experts and attempts to determine the rhetorical goals pursued by these strategic maneuvers.
Źródło:
Research in Language; 2019, 17, 1; 39-55
1731-7533
Pojawia się w:
Research in Language
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining Ship’s Safe Speed and Best Possible Speed for Sea Voyage Legs
Autorzy:
Rutkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/116750.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship’s safe speed
best possible speed
sea voyage legs
ship's speed
safety at sea
colregs
ship handling
ship maneuvering
Opis:
The purpose and scope of this paper is to describe factors to consider when determining the ship’s safe speed as well as the best speed for the sea voyage legs including directions related to vessel speed that are given in ColRegs, voyage orders and charter parties. Author also tried to describe the definition for the following notions: ship maneuvering, ship handling, safe speed, best possible speed for sea voyage legs.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 425-430
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of telexistence on a ship by using satellite communication
Autorzy:
Sasaki, S.
Okazaki, T.
Powiązania:
https://bibliotekanauki.pl/articles/117499.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
communication
Global Maritime Distress and Safety System (GMDSS)
Satellite Communications
one person bridge operation
telexistence
telexistence on a ship
remote maneuvering system
unmanned ship
Opis:
Nowadays shipping industry has problems such as reduction of mariners, aging of mariners, and labor expenses. To solve the problems, One Person Bridge Operation was developed as navigation supporting system. However, One Person Bridge Operation remained technological problems and one man error. Therefore, in this study, telexistence on a ship was proposed by using satellite communication. Telexistence on a ship is a concept of maneuvering between land and ship with at least two mariners such as navigation officer and helmsman. Navigation officer works on ship as usual and helmsman supports ship from land. In this paper, remote maneuvering system was developed as the first step of telexistence on a ship. For evaluating the effectiveness, ship experiment was carried out. From the result, navigation officer and helmsman could alter ship’s course to 20 degrees within 60 seconds and less than 5% overshoot in the proposed remote maneuvering system.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 175-180
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emergency Unberthing without Tug Assistance
Autorzy:
Kunieda, Y.
Yabuki, H.
Okazaki, T.
Powiązania:
https://bibliotekanauki.pl/articles/116447.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Emergency Situation
Emergency Unberthing
Tug Assistance
Unberthing without Tug
Pure Car Carrier (PCC)
Ship Maneuvering Simulator (SMS)
Mathematical Modeling Group (MMG)
Emergency Scenario
Opis:
Shipmasters may have to perform unberthing without tugboat assistance when a tsunami warning is issued. Keeping this in mind, we studied emergency unberthing without tug assistance by conducting numerical simulations and full-mission ship maneuvering simulator (SMS) experiments. A panamax class medium-sized bulker and a pure car carrier (PCC) were used as test ships. In the experiments, we established the limitations of basic shiphandling techniques such as stern kick out, backing, and accelerating turn in windy conditions using a mathematical modeling group (MMG)-type mathematical maneuvering model. On the basis of the results, we produced a shiphandling scenario and evaluated it using SMS experiments. We concluded that unberthing without tug assistance in 5 m/s onshore winds is possible. Furthermore, the use of thrusters can greatly reduce the time required for unberthing.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 3; 367-374
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental evaluation of forward speed effect on maneuvering hydrodynamic derivatives of a planing hull
Autorzy:
Kazerooni, M. F.
Seif, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/135366.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
planing hull
maneuvering
model test
derivative
hydrodynamic
Opis:
The calculation of unknown hydrodynamic derivatives of the equations of motion is the first step to estimate ship maneuverability and dynamic stability. These derivatives can be obtained theoretically, experimentally and numerically. Despite the development of the oblique towing model test to measure the hydrodynamic derivatives of displacement ships, limited experimental results are available for hydrodynamic derivatives of high speed crafts and speed dependency of the hydrodynamic derivatives is not understood well. In this paper a systematic series of model tests is described to determine the effect of forward speed on hydrodynamic derivatives of a monohull planing craft and the variations of the hydrodynamic derivatives by forward speed are derived. According to the results, hydrodynamic derivatives of planing hull are dramatically changed by variations of forward speed. Moreover, it is not possible to introduce a constant hydrodynamic derivative in the all the ranges of drift angle. Thus, the method of known constant hydrodynamic derivatives is not applicable to the simulation of planing craft maneuvering and variable hydrodynamic derivatives should be applied.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 40-53
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Study of Forces Exerted on Ships Due to the Vertical Walls of Navigation Channels
Autorzy:
Fathi-Kazerooni, M.
Seif, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/117379.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Navigation Channels
Vertical Walls
Hydrodynamics
Turning Moment
Ship Stability
Simulation of Ship Maneuvering
Experimental Study
Forces Exerted on Ships
Opis:
Ship maneuvering in restricted waters of harbor basins and navigation channels had been the main concern in recent years due to sudden increase of ship’s size. When the ship enters a navigation channel the lateral boundary of the channel exerts a transverse force and turning moment on the ship hull. These forces are so important in the analysis of safety of ship navigation in the channels. Ship model test in the towing tank is a reliable method to evaluate these forces. Therefore systematic model tests are held for modeling of the forces exerted on the tanker ship and dhow model traveling alongside a vertical wall. A database of the interaction forces is developed and the specific hydrodynamic effects related to the phenomena are discussed. The results can be used for simulation of ship maneuvering and assessment of safety limits for navigation of ships alongside the quay walls and breakwaters.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 199-203
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fundamental Study of Evaluation at Berthing Training for Pilot Trainees Using a Ship Maneuvering Simulator
Autorzy:
Inoue, K.
Okazaki, T.
Murai, K.
Hayashi, Y.
Powiązania:
https://bibliotekanauki.pl/articles/117099.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
pilot navigation
Ship Maneuvering Simulator
Maritime Simulation
Opis:
Use of the ship maneuvering simulator (SMS) is at the core of pilot trainees education and training, so it is desirable to have an evaluation method that can be completed shortly after each berthing training session. There are basically two methods of docking maneuvering that pilot trainees learn: one in which the ship enters from outside the port and is berthed directly at the target quay, and a second method in which the vessel carries out a turn in front of the target quay before berthing. The authors suggested an evaluation index in a previous study concerning the first docking method. In the present study, the authors propose an evaluation method for the case of berthing the vessel using the turning maneuver. Since the index obtained by this method offers a single numerical benchmark, it is an easy–to‐understand result of the training exercise. The authors carried out experiments using a SMS and confirmed that the proposed evaluation method is effective and helpful to improve the effectiveness of SMS training.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 1; 135-141
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrodynamic Analysis of Trimaran Vessels
Autorzy:
Javanmardi, M. R.
Jahanbakhsh, E.
Seif, M. S.
Sayyaadi, H.
Powiązania:
https://bibliotekanauki.pl/articles/258654.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
trimaran
resistance
maneuvering
computational fluid dynamics (CFD)
Opis:
Trimaran vessels are developed for different applications and hydrodynamic behavior of such vessels is different than usual mono-hulls. In this paper hydrodynamic resistance and maneuvering of a trimaran with Wigley body form are investigated. The effects of outriggers position in four different longitudinal and two transverse locations are studied. For hydrodynamic simulations a CFD code has been developed and used. This code is capable for simulating three dimensional, time dependent, two phases, viscous flow coupled with rigid body motion. Formulation and solution algorithm are described in detail. Different case studies have been performance and numerical results have shown good agreement with experimental data. Based on resistance and maneuvering simulation of the trimaran vessels different conclusion are made. The results show that positions of outriggers have great effect on resistance and maneuverability of trimaran. The present method can be further employed to investigate other hydrodynamic qualities of trimaran vessels.
Źródło:
Polish Maritime Research; 2008, 1; 11-18
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 43

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