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Browsing by Title: Scientific Journals of the Maritime University of Szczecin, <br>Zeszyty Naukowe Akademii Morskiej w Szczecinie

  • Jasionowski, Robert (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    Dear Readers, It is my great pleasure to present to our readers the most recent issue 61 (133) of the Scientific Journals of the Maritime University in Szczecin. This time, the Scientific Journals contains the results of nineteen research endeavors that are categorized into seven thematic groups: Automation, Electronic and Electrical Engineering, Civil Engineering and Transport, Environmental Engineering, Mining and Energy, Information and Communication Technology, Management and Quality Studies, Mechanical Engineering, and Miscellaneous. The first section – Automation, Electronic and Electrical Engineering – contains three papers. The authors of the first paper discuss issues with compensating harmonic currents, reactive power, and imbalances in the bypass load power of a closed-loop control of a shunt active power filter. The next paper describes a method for steering the mechatronics of a shaft generator by applying permanent magnet synchronous generators (PMSG), allowing for work stability while changing the rotational speed of the shaft. In the third paper, the authors present their research on the durability of selected LED lamps. The second section – Civil Engineering and Transport – includes five papers. The first describes the application of a parametric method in railway transport, especially for track infrastructure inventory. The authors of the second paper share their interesting results regarding simulations of accident results and navigational risks in fairways stemming from a ship’s technical malfunctions. The problems discussed in the third paper involve determining the position of inland vessels in the immediate vicinity of the Długi and the Kolejowy Bridges in Szczecin. As for the fourth paper, the author analyses issues associated with the safe management of a ship’s exploitation, especially as it relates to maritime safety culture. The last article in this section examines social expectations regarding public transport using the example of Szczecin. The third section – Environmental Engineering, Mining, and Energy – contains one paper that reports simulated oil spills and their spread under various atmospheric conditions. The fourth section – Information and Communication Technology – also includes one article, which presents a software pack for monitoring various possible events that threaten a ship and its crew. The fifth section – Management and Quality Studies – contains three papers. The first is devoted to human resource management in a company with regard to its development. The subject matter of the next two papers is related to the social responsibility of managing maritime ports and the environmental and societal effects of such management. The penultimate section – Mechanical Engineering – contains three articles. The authors of the first paper discuss torsional, longitudinal, and lateral vibrations of a propeller shaft. The next paper presents changes in the microstructure of elements made of unalloyed cast steel with 0.3% carbon content regenerated using welding technology. The third paper presents a method for gassing-up ethylene without uncontrolled losses and disruptions in a transshipment installation. 6 Scientific Journals of the Maritime University of Szczecin 61 (133) The last section – Miscellaneous – contains three articles. The author of the first one describes a model of safe infrastructure for an oil terminal with regards to its exploitation process. The next paper discusses the effects of LED lighting on human health, especially the eyes. The last paper contains a comparative bibliometric analysis of sources of maritime transport based on the Web of Science database. I invite all readers to visit our website: http://scientific-journals. eu/. It provides all essential information on the publication process, along with full papers included in the current 61 (133) issue and archival papers published in the Scientific Journals of MUS.
  • Bielecka, Agata; Wojciechowski, Daniel (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This paper presents the compensation tasks performed by a shunt active power filter, including compensation of harmonic currents, reactive power, and an unbalanced load current. The paper demonstrates novel control of the shunt active power filter in a closed-loop system. The control algorithm was verified by performing simulations and compared the simulated results with those obtained in an open-loop control system. All simulations were conducted in the PLECS program using a control algorithm written in C programming language.
  • Tarnapowicz, Dariusz (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    Among the various methods for generating electricity on a ship, a shaft generator system is characterized by the highest energy and economic efficiency. The use of a Permanent Magnet Synchronous Generator (PMSG) in these systems, in comparison to classic synchronous generators, improves the ship’s propulsion efficiency and the system’s reliability. The problem of adjusting the PMSG’s excitation and changing the speed of the generator’s shaft can be solved by the use of modern power and electronic systems. This article presents a method for controlling the mechatronic system of a shaft generator with a PMSG, which enables stable operation to be achieved when changing the rotational speed of the shaft. Analytical and simulation studies were carried out and have enabled the boundaries of the area in which the PMSG can operate to be determined, while maintaining the required electrical power. The results have shown that the use of a PMSG instead of an EESG can increase the energy efficiency of the shaft generator system and increases the system’s reliability.
  • Zalesińska, Małgorzata; Zabłocka, Julita; Pawlak, Andrzej (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    Luminous flux reduction during operation affects the operating lifetimes of LED lamps. Due to the very long lifetimes of LED sources, i.e. tens of thousands of hours, the lifetime declared by the manufacturer is most often determined by forecasting the luminous flux reduction. Lifetime forecasting is performed based on measuring the operating luminous flux reduction within a time frame of at least 6000 hours, every 1000 hours, followed by extrapolating the obtained results with a relevant exponential curve. This article presents the results of measurements of luminous flux changes taking place between 0 and 10,000 operating hours of several LED light sources. The obtained results were analyzed, and the lifetimes of the examined lamps were evaluated.
  • Czaplewski, Krzysztof; Specht, Cezary; Koc, Władysław; Wilk, Andrzej; Karwowski, Krzysztof; Dąbrowski, Paweł; Specht, Mariusz; Chrostowski, Piotr; Szmagliński, Jacek (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    For many years, satellite systems have seen widespread use in a variety of technical applications, as well as in operations related to setting-out and the exploitation of track infrastructure. Their main applications include an inventory of the trackage course and detecting changes in its position. In both of these tasks, the most important element that determines the quality of an analyses is the high accuracy of the determinations being carried out. Satellite surveying techniques are not always sufficiently accurate, and in such cases, it is necessary to employ other land surveying methods to process surveying data. This article presents the authors’ considerations with regards to the possibility of applying one of the most common land surveying adjustment methods, the parametric method, to operations related to an inventory of tram infrastructure in Gdańsk. The results are based on surveys carried out during a surveying campaign in the autumn of 2018. The considerations presented in the article concern a small part of the research conducted under project No. POIR.04.01.01-00-0017/17 entitled “Development of an innovative method for determining the precise trajectory of a railborne vehicle” which is being implemented by a consortium of Gdansk University of Technology and Gdynia Maritime University.
  • Gucma, Stanisław; Gralak, Rafał; Muczyński, Bartosz (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The identification of navigational risks of accidents in fairways is a basic principle for the construction or modernization of waterways in restricted waters and when the conditions of safe operation change. The estimation of navigational risk requires the evaluation of the consequences of accidents occurring in fairways: grounding, impact against a vertical shore, port/offshore structure or moored ship. When determining the consequences of these accidents, it is necessary to know the emergency maneuvering area and the speed of the ship at the time of the accident. The method of ship movement simulation in real time was used to determine the parameters of emergency maneuvering areas and the speed of vessels during the maneuvers. The results of the simulation experiment include full form vessels (bulk carriers, tankers) with a capacity ranging from 5,000 DWT to 100,000 DWT. The presented results of simulation tests enabled the evaluation of probability and consequences of ships’ accidents in fairways resulting from technical failures of ships’ steering equipment, allowing to assess the navigational risk for ships sailing through different types of fairways (approach channels, port entrances and inner port fairways).
  • Kujawski, Artur (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The main aim of this article is to present a method to process Inland AIS (automatic identification system) data that is part of RIS (river information services), as well as to synthesize and visualize information obtained from it for further analysis. This article presents problems with imaging the position of inland navigation units in the immediate vicinity of the Długi and Kolejowy Bridges in Szczecin. The passing of 80 inland units on this section of the Western Oder River was analyzed. Data were obtained from the AIS message database and industrial cameras of the RIS Monitoring Centre at the Inland Navigation Office in Szczecin. 35 units were equipped with AIS messaging devices. This article analyzed the data after previous processing, which consisted of selecting appropriate research units and decoding AIS messages recorded in the VDM message type (VHF Data Link Message). Then, the acquired positions of inland navigation units on the map were visualized to calculate the number of errors and their location. The obtained data were used to illustrate the locations of interference during the operation of transmitter-receiver equipment that prevented determining the exact position of inland navigation units in the immediate vicinity of the above-mentioned bridges.
  • Pyć, Dorota (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This paper addresses the importance of the development of maritime safety culture, in terms of sustainable shipping through continuous improvement of the safety management system (SMS) that enables a shipping company’s personnel to effectively implement the company’s safety and environmental policy. The main aim of the International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety Management Code – ISM Code), which was adopted by the International Maritime Organization (IMO) and became mandatory, by virtue of its entry into force on the 1st of July 1998, in SOLAS Chapter IX on the Management for Safe Operation of Ships, is to provide an international standard for the safe management and operation of ships as well as pollution prevention. Thus, compliance with the ISM Code and its effective enforcement is necessary to ensure adequate standards of safety and pollution prevention. The purpose of this paper is to show that the internationally unified legal measures that have been developed under the IMO in the ISM Code are an instrumental consequence of maritime safety values, and allow them to be achieved in practice. The result of this research is the justification of the thesis concerning the need to create a safety culture as a condition for sustainable shipping, including the safe operation of ships in the environment.
  • Wiktorowska-Jasik, Anna (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The issues discussed in this article concern the basic assumptions for the sustainable development of public transport in cities. We discussed the need and direction of changes that occur in public transport that were referred to both users and transport organizers in cities. To this end, we characterized the activities which encourage urban residents to use forms of urban transport and the limitations of commuting via individual transport. The purpose of this article was to determine the main directions and areas of development of public transport in Szczecin. In addition, we also presented the solutions applied in the city transport system aimed at making it sustainable. In addition, an attempt was made to determine the impact of selected solutions on residents’ transport behaviors. The survey research method was used to examine societal opinions and expectations regarding public transport. We also approximated the basic investments that have been implemented to make transport more sustainable and the activities for the development of electromobility. Future research directions on the sustainability of transport in the city, and especially on limiting vehicular traffic, were also discussed.
  • Juszkiewicz, Wiesław (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The specificity of navigation in the Baltic Sea means that intensive ship traffic occurs on the main shipping routes. Therefore, there is a high risk of a collision that will result in an oil spillage; the Baltic Sea is an area that is very sensitive to this type of accident. In addition, there are sensitive Natura 2000 areas that require special protection. A case study of a potential oil spill in the Słupska Bank area has been carried out in this paper; the results of the oil spill simulations and their analyses are presented in this article. The simulations were carried out in the PISCES II oil spill simulator. The spread of oil pollutants in typical weather conditions, the size of the threatened areas and the oil’s impact time have been analyzed. Based on the results obtained from the simulations, the most adverse weather conditions for the simulated oil pollution accident in the TSS Słupska Bank region have been determined.
  • Przeniosło, Łukasz; Peschke, Jörg; Hering, Jörg (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The recent rapid improvement of nautical equipment functionality allows one to better observe and predict the dangers related to seamanship. However, these new features come with added complexity, and large amounts of information can overwhelm vessel crews and fleet operation centers, and the current state-of-the-art tools cannot filter out only the most important data for a given time and location. This paper presents the concepts and the algorithms of a software suite that provides a user with problem-oriented advice about a particular risk endangering a vessel and its crew. Based on the calculated navigational dangers and their predicted development, actionable guidance is proposed in an easy-to-understand human language. The quality of good seamanship is improved by a holistic approach to vessel installation, automated fleet operation center priority queuing, and the evaluation of crew performance during simulator training and daily operations. Both the software user interface, as well as the insights provided by the algorithm, are discussed.
  • Drela, Karolina (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The aim of the article is to present the essence of sustainable human resource management and attempt to answer the question of whether enterprises actually use the concept of the sustainable management of human resources in business management to achieve sustainable development. This is why the following research question was chosen for the study: “Is the concept of sustainable human resource management important in achieving sustainable development of an enterprise?” Verification of the research question and the realisation of the stated goal were made on the basis of a critical analysis of the source literature and a case study. In striving to achieve the research goal, the first part of the article presents the essence of sustainable human resource management; the second part presents a case study. This paper concludes with the applications in which the research question was confirmed. Enterprises choose a strategy for human resource management, depending on the following: the situation in the labour market, the economic situation, legal regulations, demographics, changes in technology in a given enterprise, the activities of both the employers’ and employees’ organisations, as well as self-governing bodies, employment agencies or personnel consulting firms and the capital owned by the organisation. The results of this study have shown that enterprises actually use the concept of the sustainable management of human resources in business management to achieve sustainable development.
  • Klimek, Hanna; Michalska-Szajer, Anna; Dąbrowski, Janusz (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    Seaports are not only transport nodes but they are also important links in the land-sea transport chains and global supply chains. Due to the nature of their activities, seaports have a significant impact on both their internal and external environment. This necessitates the implementation of the concept of Corporate Social Responsibility (CSR). This concept focuses on, to a large extent, considering the positions of all the stakeholders when planning and implementing company strategies. Pursuant to the Act on Seaports and Harbours, the seaports in Szczecin and Świnoujście are ports of primary importance to the national economy. A great challenge for the ports is to simultaneously balance their development with caring for the environment. The aim of this article is to determine whether the seaports in Szczecin and Świnoujście are socially responsible and what the result of their impact on the natural environment and society are. This article uses the case study method, which analyses the activities undertaken by the port management as well as the enterprises that are part of the port service supply centres in Szczecin and Świnoujście, and assesses the effects of these activities. From the results, it can be stated that the Ports Authority, through its business, pro-environmental, pro-social and pro-employee activities, implements the goals of CSR and is a socially responsible entity, although more could be done.
  • Lulek, Adam; Sadowska, Beata (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    Corporate social responsibility (CSR) is the process of finding out the changing expectations of stakeholders and including them in a business management strategy. CSR is a concept of the optional incorporation of social and environmental aspects into the operations of a business entity. The objective of this article is to: (1) present the historical determinants of CSR and its practical dimension; (2) characterize the activities of fuel companies in the light of the publication of CSR information in reports; (3) indicate the information and contents of the annual reports of oil companies – in particular taking account of the information about corporate social responsibility; (4) provide proposals for the structure of a model annual report including information about corporate social responsibility which could be used for the selected oil companies that were investigated. The methods of inductive and deductive reasoning and descriptive analysis, as well as desk research were used in the writing of this article.
  • Firouzi, Jabbar; Ghassemi, Hassan; Vakilabadi, Karim Akbari (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    A propeller shaft generally experiences three linear forces and three moments, the most important of which are thrust, torque, and lateral forces (horizontal and vertical). Thus, we consider 4DOFs (degrees of freedom) of propeller shaft vibrations. This paper is presented to obtain the vibration equations of the various coupled vibrations of the propeller shaft at the stern of a ship (including coupled torsional-axial, torsional-lateral, axial- lateral, torsional-axial, and lateral vibrations). We focused on the added hydrodynamic forces (added mass and added damping forces) due to the location of the propeller behind the ship. In this regard, the 4DOFs of the coupled vibration (torsional-longitudinal and lateral vibrations in the horizontal and vertical directions) equations of shaft and propeller systems located behind a ship were extracted with and without added mass and damping forces. Also, the effect of mass eccentricity was considered on vibrations occurring at the rear of the ship.

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