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Wyszukujesz frazę "Nikitakos, N." wg kryterium: Autor

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    Wyświetlanie 1-12 z 12
    Tytuł:
    Is It Time for the Maritime Industry to Embrace 3d Printed Spare Parts?
    Autorzy:
    Kostidi, E.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/116591.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    3D printing
    maritime Industry
    additive manufacturing (AM)
    spare parts
    shipping industry
    space parts supply chain
    supply chain
    voxel
    Opis:
    New technology comes with benefits for companies that choose to adopt. Additive manufacturing (AM) or 3d printing as it is commonly known has been already implemented in various sectors (industrial and consumer products, medical, automotive, aerospace, etc.). The shipping industry is characterized as conservative to changes. As AM is starting to consolidate in the industry, can offer lessons guiding changes. Application in industries with similar to shipping characteristics (industries with moving assets), reveals the potential of applying it in the shipping industry. The availability of spare parts is important for the vessel maintenance. Additive manufacturing could shorten the space parts supply chain in the maritime industry, since the part could be made near the place it is needed.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 557-564
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of analytic hierarchy process and TOPSIS methodology on ships’ maintenance strategies
    Autorzy:
    Diagkinis, I.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069349.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    ships’ equipments maintenance strategies
    ship safety
    AHP
    analytical hierarchy process
    TOPSIS
    Opis:
    The aim in adoption of maritime equipments’ maintenance strategy is the reduction of risk in order to achieve safer navigation, to enhance environmental friendly behaviors, to increase the safety and positively contribute to the overall operability management of the ship. The use of weak maintenance strategy could result in waste of time, money and resources, and often has no effect on improving or maintaining the availability of equipments. In this article, we propose a model in evaluation of on non-deterministic factors that affect the ships’ safety and a framework for ships management governance. The review of maintenance strategies has proven that a decision support mechanism needs mainly multiple criteria decision on ship equipments maintenance strategy selection. Through Analytic Hierarchy Process methodology and the extended evaluation of results on adoption of Technique for Order Preference by Similarity to Ideal Solution a useful tool to prioritize needs at any level and includes the decisions that should be taken into consideration from the shore office managers and the ship personnel for the safe functionality of the ship is provided.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2013, 4, 1; 21--28
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The importance of reporting all the occurred near misses on board: the seafarers’ perception
    Autorzy:
    Georgoulis, G.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/117431.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    human factor
    near misses
    near misses on board
    seafarers’ perception
    International Safety Management (ISM) Code
    ISM Implementation
    STCW Convention
    safety culture
    Opis:
    Improvement of maritime safety has previously been based on a reactive regulatory approach, where regulatory improvements have been imposed to prevent recurrence of a specific type of accidental event or accidental scenario, after such an accidental event has happened. The ISM Code requires that hazardous situations are to be reported to the company, investigated and analyzed in order to prevent future happenings. Near-miss reporting is positively evaluated in this respect, because, near-misses are represented experiences and mistakes that should be shared to learn from in order to prevent the occurrence of accidents. The expression “that was too close” on ships’ bridges between the master and the officers is rarely transferred to a near miss report form, preserving the probability of reoccurrence. Near misses occurred and near misses reported might present a big difference in number. Officers easily forget the near miss situation when the safety of the ship is restored. Hazards identification will be based on documented management system (SMS- TMSA- ISO). The analysis of the documented safety and quality management will address the gap in order to improve the implemented systems. The objective of this research is to find out the best practices about near-miss reporting from the companies considered to have high level of commitment to safety within their organization. The study is based on interviews with a total of 35 seafarers who are joining on Greek ocean going vessels, and 4 representatives from safety departments of Greek maritime companies. The research also aims to address the seafarers’ perspective of reporting all near misses which have been experienced while they were in charge of specific duties (bridge watch, engine room watch) or any other operation (mooring, maintenance, drill) carried out on board. The majority of both the seafarers and the companies’ representatives believe that prior to the near miss reporting issue a safety culture environment on board is the real gain pursuit. In their perspective this is first priority to improve the general safety on board. It seems that near miss reporting is carried out on board as a compulsory compliance to the regulatory framework (ISM implementation). Further, it seems that the companies are not yet utilizing the reported data to improve feedback and the follow-up within the organization. The authors would like to thank companies’ representatives and seafarers who have participated in this study.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 657-662
    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 Research in Operation Management in Engine Room by using Language Sentiment/Opinion Analysis
    Autorzy:
    Papachristos, D.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/116334.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    safety at sea
    Language Sentiment
    Opinion Analysis
    Experimental Research
    Operation Management
    engine room simulator
    Operation Management in Engine Room
    Mixed Methods Research (MMR)
    Opis:
    The paper argues for the necessity of a combination MMR methods (questionnaire, interview) and sentiment/opinion techniques to personal satisfaction analysis at the maritime and training education and proposes a generic, but practical research approach for this purpose. The proposed approach concerns the personal satisfaction evaluation of Engine Room simulator systems and combines the speech recording (sentiment/opinion analysis) for measuring emotional user responses with usability testing (SUS tool). The experimental procedure presented here is a primary effort to research the emotion analysis (satisfaction) of the users-students in Engine Room Simulators. Finally, the ultimate goal of this research is to find and test the critical factors that influence the educational practice and user’s satisfaction of Engine Room Simulator Systems and the ability to conduct full-time system control by the marine crew.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8 no. 4; 605-612
    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 Research with Neuroscience Tool in Maritime Education and Training (MET)
    Autorzy:
    Papachristos, D.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/116805.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    maritime education and training (MET)
    neuroscience tool
    experimental research
    Electronic Chart Display and Information System (ECDIS)
    MATLAB
    educational software
    Maritime Engine Simulation (MES)
    gaze tracking
    Opis:
    The paper argues for the necessity to combine MMR methods (questionnaire, interview), gaze tracking as neuroscience tool and sentiment/opinion techniques for personal satisfaction analysis at the maritime and training education (MET) and proposes a practical research approach for this purpose. The purpose of this paper is to compare the results from gaze tracker (Face analysis tool) of three experiments & sentiment analysis of two experiments for satisfaction evaluation of the students-users’ (subjective) satisfaction of the maritime education via user interface evaluation of several types of educational software (i.e. engine simulator, ECDIS, MATLAB). The experimental procedure presented here is a primary effort to research the emotion analysis (satisfaction) of the users-students in MET. The gaze tracking & sentiment analysis methodology appears to be one sufficient as evaluation tool. Finally, the ultimate goal of this research is to find and test the critical factors that influence the educational practice and user’s satisfaction of MET modern educational tools (simulators, ECDIS etc.).
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 341-349
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marine Navigation Using Expert System
    Autorzy:
    Nikitakos, N.
    Fikaris, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/117046.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    marine navigation
    Expert System
    Safety of Navigation
    Weather Condition
    Loading Condition
    decision support system (DSS)
    Case Based Reasoning (CBR)
    Computer Simulation
    Opis:
    A ship’s autopilot adjustment is a matter of utmost importance since it affects its safety, command as well as fuel and time efficiency. A number of methods have been developed in order to cope with this issue usually based on models that simulate the weather conditions and adjust the device accordingly. Some of them have a considerable degree of success but none dealt with the problem completely. The main obstacles are the difficulty of simulating the infinite weather and loading conditions and to properly represent them with mathematical equations or rules. This paper describes a method of selecting the best out of a pre-existing set of configurations, taking into account any weather situation, loading condition and type of ship. Moreover, the selected configuration can improve itself during the entire life cycle of the vessel, since it fine tunes its properties for better results. This approach uses Case Based Reasoning as its core technology and is a part of a hybrid system that analyses and solves prefixed problems of maritime interest.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 251-259
    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 Neuroscience Approach in User Satisfaction Evaluation in Maritime Education
    Autorzy:
    Papachristos, D.
    Nikitakos, N.
    Lambrou, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/117262.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Neuroscience Method
    Maritime Education and Training (MET)
    MET System in Greece
    Maritime Education
    User Needs
    e-Learning System
    User Satisfaction
    engine room simulator
    Opis:
    The evaluation with the use of neuroscience methods and tools of a student’s satisfaction – happiness from using the e-learning system (e-learning platforms, e-games, simulators) poses an important research subject matter. In the present paper, it is presented a research on course conducted in the Marine Training Centre of Piraeus. In particular, this research with the use of a neuroscience tools-gaze tracker and voice recording (lexical analysis), investigates the amount of satisfaction of the students using Engine room simulator (ERS 5L90MCL11, Kongsberg 2003 AS) and ECDIS system by monitoring the users’ eye movement and speech in combination with the use of qualitative and quantitative methods. The ultimate goal of this research is to find and test the critical factors that influence the educational practice and user satisfaction of e-learning marine systems and the ability to conduct full-time system control by the marine crew.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 3; 319-326
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Apply FMEA modeling to a floating ecological desalination unit
    Autorzy:
    Dagkinis, I.
    Lilas, T.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069530.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    FMEA
    reliability block diagram
    floating autonomous desalination
    Opis:
    Water scarcity in small Aegean islands is considered a major problem for their development. On the other hand high potential renewable energy sources are available. Therefore a floating desalination unit was developed in order to treat the problem in an ecological manner. The floating unit has been operating for four years at sea close to a small island. Marine environment and autonomous remote operation led to a more complex design with several sensors and safety mechanisms. This paper illustrates and applies Failure Modes and Effects Analysis (FMEA) modeling to Floating Ecological Desalination Unit. FMEA is based on monitoring data and also taking into account failure dependencies between components during the assessment of desalination system reliability. Then two systems, one with safety mechanisms and one without are analyzed by Reliability Block Diagrams (RBD) and the reliability of each system is computed. The comparison between a simple system and the remote autonomous system illustrates the implications of the additional monitoring mechanisms and the impact of these mechanisms to reliability and risk assessment on the floating wind powered offshore desalination unit.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2011, 2, 1; 73--82
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ship’s diesel electrical system availability modeling
    Autorzy:
    Mennis, E.
    Nikitakos, N.
    Platis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069679.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    Markov
    diesel generators
    PRA
    reliability
    Opis:
    One of the most critical systems for a ship operation is the diesel generator set. This is why the ship preserves four different diesel generators except the power battery packs. The paper describes the generator operations and the main failure conditions. Assuming that the failure rate of the system parts is constant the paper show how the diesel generator system could be modelled in the context of Markov theory.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2009, 2; 303--308
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operational failure prevention methodology for offshore systems using multiple criteria decision-making process
    Autorzy:
    Dagkinis, I.
    Lilas, T.
    Nikitakos, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069448.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    AHP
    modiefied FMEA
    offshore operational reliability
    Opis:
    A framework for decision analysis, which has been applied on an operational offshore system and is based on a multiple criteria decision making (MCDM) process, is presented in this paper. This provides a generic methodology for the evaluation of alternatives and implementation of operational and design improvements based on the experience gained from past failures. The Failure Modes and Effects Analysis (FMEA) method is modified and used as a significant criterion together with Analytic Hierarchy Process (AHP) in order to enhance the decision making process. The mathematical model of AHP identifies and combines the weight of changes, as well as the results of modified FMEA. This combination takes into account possible interactions among the causes of failure by integrating several elements, enhancing the FMEA method. Next, the paper describes a decision model that incorporates also decision maker’s subjective assessments and is suitably applied to an autonomously operating floating structure. This decision making technique, enables the manipulation of both qualitative assessments and quantitative metrics in order to improve final judgments and, in general, advance the operation of the complex floating system.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2012, 3, 1; 15--22
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a risk assessment methodological framework for seaborders
    Autorzy:
    Gkrizis, V.
    Leventakis, G.
    Nikitakos, N.
    Sfetsos, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069512.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    sea borders
    risk assessment
    Opis:
    Sea borders are identified as a major entry point in EU. In order to be adequately prepared to manage illegal immigrant’s inflow and mitigate the significant socioeconomic impact. The present paper introduces a comprehensive risk analysis methodological framework for the analysis of the present situation, risk prioritization and mitigation analysis. The proposed approach will be applied to a specific site in a N. Aegean Island, Greece as the country is the access point of over 80% of all immigration flow to the EU.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2014, 5, 2; 29--32
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A methodology for rating and ranking hazards in maritime formal safety assessment using fuzzy logic
    Autorzy:
    Dourmas, N. G.
    Nikitakos, V. N.
    Lambrou, A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069600.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    decision making
    formal safety assessment
    hazard identification
    marine safety
    fuzzy logic
    Opis:
    Formal safety assessment of ships has attracted great attention over the last few years. This paper, following a brief review of the current status of marine safety assessment is focused on the hazards identification (HAZID) and prioritisation process. A multicriteria decision making framework, which is based on experts‟ estimation, is then proposed for hazards evaluation. Additionally in this paper many aspects of the evaluation framework are presented including the synthesis of evaluation teams, the assessment of the importance of criteria, the evaluation of the consequences of the alternative hazards and the final ranking of the hazards. The proposed methodology has the innovative feature of embodying techniques of fuzzy logic theory into the classical multicriteria decision analysis. The paper concludes by exploring the potentiality of the above methodology in providing a robust and flexible evaluation framework suitable to the characteristics of a hazard evaluation problem.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2007, 1; 59--65
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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