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Browsing by Author Majzner, Piotr: 12 Scientific Journals of the Maritime University of Szczecin

  • Majzner, Piotr; Piszczek, Wojciech (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This article, continuing considerations on the measures determining the ca-pacity of water traffic engineering system, refers to a rational choice of traffic capacity for acceptable operating conditions. The theoretical foundation has been supported with examples of real values of quantities identifying the pro-cess of vessel traffic. The simulation method has proved to be useful in deter-mining measures of choice of the capacity characteristics of a WTE system. Important practical conclusions have been drawn.

Other publications

  • Majzner, Piotr; Piszczek, Wojciech (Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 2010)
    These authors present operational and safety aspects of research problems relating to waterway intersections and their safety and operational aspects. Attention is drawn to delay times that occur in the process of vessel traffic and the probability of close quarter situations. The results of simulations are compared with analytical research. Examples are given of real values of both system and traffic process measures
  • Majzner, Piotr (Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 2014)
    This author presents models of processes taking place at a waterway intersection. The measures of traffic processes under consideration are the number of vessels waiting to enter an intersection and delay time of these vessels. The applicability of specific models is discussed along with their usefulness as a function if input intensity of vessel stream flowing into a waterway intersection.
  • Majzner, Piotr; Mąka, Marcin (Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 2014)
    The presented simulation model of radiocommunication events management allows to investigate problems occurring in marine radiocommunications. Based on a variety of research methods, we focus on the method of computer-based simulation, and describe the stages of construction and structure of the simulation model. Finally, we discuss possible applications of the developed model.
  • Lisaj, Andrzej; Majzner, Piotr (Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 2014)
    Presenting a model of radiocommunication events management system, we have described its structure and flow of input and output data streams. Besides, we have pointed out the need for developing a system of radiocommunication events management, and possible applications of the developed model.
  • Majzner, Piotr; Piszczek, Wojciech (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This article is a continuation of considerations on the measures determining fair-way traffic capacity. It refers to rational choice of traffic capacity for acceptable opera-tional conditions. The theoretical foundation has been supported with examples of real values of quantities identifying the process of vessel traffic. It has been shown that the method is useful in determining measures of choice capacity characteristics of a marine traffic engineering system. Important practical conclusions have been drawn.
  • Majzner, Piotr; Piszczek, Wojciech (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This article presents an application of the deterministic analysis method and computer simulation for the research into the vessel traffic flows at an approach channel and a fairway. The simulation model used takes into consideration the random character of vessel reports at the fairway approach area. The research included various structures and intensities of traffic flows concerning vessels approaching the examined fairway section. It has been shown that the presented computer simulation method is useful in the identification and assessment of vessel traffic parameters.
  • Piszczek, Wojciech; Majzner, Piotr (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The paper sets forth a computer simulation method analysis of the phenomenon of traffic flow movement in an approach area and in a fairway. The model takes into con-sideration the probability of a vessel report in the fairway approach area and the dis-persion of the speed values of fairway vessel traffic. The advantage of this method for the identification of the phenomena and parameters estimation of the movement process has been proved.
  • Majzner, Piotr; Piszczek, Wojciech (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This article present basic measures determining fairway traffic capacity. The teoretical foundation has been supported with examples of real values of quantities identifying the process of vessel traffic. It has been show that the method is useful in determining capacity characteristics of a marine traffic engineering system. Important practical conclusions are drawn.
  • Majzner, Piotr (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    Przedstaw iono możliwości zastosowania niektórych elementów sztucznej inteligencji °raz predykcyjnych algorytmów regulacyjnych przy tworzeniu systemu wspomagającego od zastępującego pracę nawigatora na mostku
  • Mąka, Marcin; Majzner, Piotr; Lisaj, Andrzej (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This article presents the structure of a model of the allocation of radiocommunication events at coastal radio stations, land-based satellite stations and on vessels in sea area A3. The propagation of radio waves in the HF band has been analyzed to examine the range of various radio stations and their capabilities of establishing communication between each other. We also present methods of modeling and displaying the deployment of individual stations, of presenting radiocommunication events as a function of time using time diagrams, as well as the manner of the chronological presentation of radiocommunication events and related decisions. It has been shown that there is a relationship between the effectiveness of communication and propagation conditions that is strongly dependent on the time-of-day. We present the need to develop a decision support system for the radio operator on the bridge.
  • Mąka, Marcin; Majzner, Piotr (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    The article proposes a model of the system supporting the decision-making process relating to the radio operator on board a ship after a distress alert is received by a Digital Selective Calling (DSC) controller working on VHF channel 70. The model is aimed at the implementation into the system of radiocommunication event management. The system takes into account the existing Radio Regulations. The model makes use of Petri nets, which are elements of graph theory. The time domain is comprised in the developed graph, and the states (places) and transitions capable of autonomous functioning are separated, as are those places and transitions requiring direct operator action based on empirical knowledge.
  • Mąka, Marcin; Majzner, Piotr (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This paper presents an analytical method for determining marine VHF communication bands based on the propagation model included in the International Telecommunication Union (ITU) recommendations. The developed method to determine communication bands was compared with the model recommended by the International Maritime Organization (IMO). The usefulness of the method developed by the authors has been demonstrated for the needs of the Radiocommunication Events Management System (REMS).

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