Tytuł: Alternative Dimensional Reduction Methods on the Example of Data Preprocessing to Build a Ship Exhaust Model

Autor/Autorzy: Mariusz Dramski, Marcin Mąka

Miejsce publikacji: European Research Studies Journal, 2022, vol XXV, issue 2, 587-596

Rok: 2022

Słowa kluczowe: correlation, curse of dimensionality, exhaust emission, arc angle index, data dimensions, dimensionality reduction

Abstrakt: Systems modeling is one of the basic research methods in scientific human activity. It should also be mentioned that the modeled systems are often multidimensional, which is an additional serious obstacle. Richard Bellman formulated the concept of the “dimensional curse” which says that as the dimensionality of a system increases, difficulties increase geometrically. In this article, the authors consider the problem of dimensionality reduction in order to build a model of the ship’s exhaust emissions. It was observed that some data are incomplete or have little impact on the baseline variables. Design/methodology/approach: Two methods of dimensionality reduction were applied (Pearson’s linear correlation index and arc-angle index) and their suitability for this process was discussed. Findings: Thanks to the methods used, it was possible to obtain information on the significance level of each of the model inputs. In addition, a lot depends on context, data availability, and much more. In any case, it is worth doing research in this direction. Practical implications: We deal with modeling mainly in cases when we need to rely on measurement data, and the modeled system itself is unknown to us. The only thing the researcher has at his disposal is a certain set of measurement data, which very often lacks metadata. Nevertheless, even the basic information about input and output data allows you to create a model. However, the problem may be too much data. Although their storage itself is nothing difficult at present, the same sending them using means of communication (e.g. sending via the Internet) may already be troublesome. Originality value: Typically, in the analysis of significance, methods that take into account the value of variance are used. Such a method is, for example, PCA (principal component analysis) (Sorzano 2014, Scholkopf 1997). The originality of the approach described in the article, however, consists in building a ranking of the significance of individual variables.

Tytuł: Mental Health Surveillance Tools for Sea Workers

Autor/Autorzy: M. Dramski, H. Kovisto, T.Gregorić, G. de Melo Rodriguez, A. Chronopoulos, R. Ziarati

Miejsce Publikacji: TransNav 2022, vol. 16, no.1, pp. 121–124

Rok: 2022

Słowa kluczowe:

Abstrakt: This article presents the results of the works of the PROMETHEAS project, which focuses on the mental health of sea workers. This project is carried out at the Maritime University of Szczecin and brings together a consortium of various maritime institutions from Slovenia, Greece, Spain, Finland and Great Britain. PROMETHEAS aims to provide tools for assessing the mental health of sea workers that can be used by professionals and stakeholders alike. The most important ones will include an application for mobile systems (Android, iOS) and an online and offline e-learning course.

Tytuł monografii: Development of Transport by Telematics

Tytuł rozdziału monografii: AIS Data Acquisition for Intelligent System for Obtaining Statistics

Autor/Autorzy: Mariusz Dramski, Marcin Mąka

Rok: 2019

Słowa kluczowe: AIS, data mining, intelligent systms, intelligent statistics

Abstrakt: In this paper the AIS data acquisition procedure for intelligent system for obtaining statistics is described. During this procedure several problems occurred and the way to solve them is presented. The aim of such data acquisition is to prepare them for an intelligent system which can be applied by different institutions responsible for creating the transport politics in Poland. This paper is also the introduction to the new project realized by the Maritime University of Szczecin with other cooperating institutions.

ISBN: 978-3-030-27546-4

Tytuł monografii: Advances in Maritime Navigation and Safety of Sea Transportation

Tytuł rozdziału monografii: Application of the BPMN Models in Maritime Transport

Autor/Autorzy: Mariusz Dramski

Rok: 2019

Słowa kluczowe: business Process Modeling Notation

Abstrakt: Bussines Process Modeling Notation (BPMN) is a very useful tool in process modeling. The universal character of this approach lets also to apply this methodology into other areas of science, bussines, etc.

ISBN: 978-0-367-35760-3

Tytuł: Guidelines for recording transport event logs

Autor/Autorzy: Mariusz Dramski

Miejsce publikacji: Zeszyty Naukowe Akademii Morskiej w Szczecinie, vol. 53, no. 125, pp. 102-105

Rok: 2018

Słowa kluczowe: process mining, event log, XES, CSV

Abstrakt: A process is an ordered set of related activities taking place in a given time. Processes are present in all branches of the economy, engineering, science, etc. Due to the huge amount of data produced the rapid development of data mining techniques has been observed. Similar methods are also used in the context of processes and are called process mining. The main task of process mining is to create a process model, which is used to reason about the process and to make decisions inside it. The process model may be used to discuss responsibilities, simulations, predictions, etc. The main data structures in process mining are event logs. It is always very important to have correct data which makes creating a reliable process model possible. In this paper the basic guidelines for recording such event logs have been described and conclusions were drawn. The main focus of this research was transport problems.

Tytuł: Analiza opóźnień samolotów pasażerskich z wykorzystaniem reguł asocjacynych

Autor/Autorzy: Mariusz Dramski, Marcin Mąka

Miejsce publikacji: Autobusy. Technika, Eksploatacja, Systemy Transportowe, vol. 226, no. 12, pp. 755-757

Rok: 2018

Słowa kluczowe: associacion rules, filght’s delays, air transport

Abstrakt: Wydajność transportu pasażerskiego w tym lotnictwa cywilnego, jest kluczowa dla światowej gospodarki. Jednym z głównych czynników oceny linii lotniczych przez pasażerów jest punktualność. Należy tu uwzględnić również fakt, iż siec połączeń miedzy lotniskami na całym świecie jest niezwykle skomplikowana.

Tytuł: Propozycja algorytmu wykrywania zmian kursu i prędkości śledzonego obiektu

Autor/Autorzy: Marcin Mąka, Mariusz Dramski

Miejsce publikacji: Autobusy. Technika, Eksploatacja, Systemy Transportowe, vol. 226, no. 12, pp. 783-786

Rok: 2018

Słowa kluczowe: wykrywanie manewru, predykcja, obszar ograniczony

Abstrakt: Proces wyboru drogi w obszarze ograniczonym wymaga znajomości nie tylko samego obszaru, ale także bieżącego oraz przyszłego położenia innych poruszających się w nim obiektów. Zadanie to jest stosunkowo proste w przypadku gdy śledzone obiekty nie zmieniają kierunku ruchu oraz prędkości.

Tytuł monografii: Smart Solutions in Today’s Transport

Tytuł rozdziału monografii: Missing Data Problem in the Event Logs of Transport Processes

Autor/Autorzy: Mariusz Dramski

Rok: 2017

Słowa kluczowe: Marine navigation, PNT, IMO, Data processing, e-Navigation

Abstrakt: In the paper the Authors present draft Guidelines for Shipborne Position, Navigation and Timing Data Processing elaborated by the International Maritime Organization (IMO) [1]. The purpose of these Guidelines is to enhance the safety and efficiency of navigation by improved provision of position, navigation and timing (PNT) data to bridge teams (including pilots) and shipboard applications (e.g. AIS, ECDIS, etc.). The shipborne provision of resilient PNT data is realized through the combined use of on-board hardware and software components. The shipborne PNT Data Processing (PNP-DP) is the core repository for principles and functions used for the provision of reliable and resilient PNT data. These Guidelines define principles and functions for on-board PNT data processing taking into account the scalability of PNT-DP. Within the e-Navigation strategy the IMO has identified the user need on improved reliability, resilience and integrity of bridge equipment and navigation information as one of the five prioritized e-Navigation solutions, whereby the resilient provision of PNT data acts as Risk Control Option.

ISBN: 978-3-319-66250-3

Tytuł: Clusterization methods in detecting the restricted areas for sea transport

Autor/Autorzy: Mariusz Dramski

Miejsce publikacji: Archives of Transport System Telematics, vol. 10, no. 1, pp. 24-27

Rok: 2017

Słowa kluczowe: data mining, Clusterization, restricted areas

Abstrakt: Clusterization is one of the data mining techniqes which is responsible for classifying data. Selection of the proper parameters leads to some desider clusters behavior. This fact can be used in detecting the restricted area for ships and other units.

Tytuł monografii: Marine Navigation

Tytuł rozdziału monografii: Inductive mining in Modeling of the Ship’s Route

Autor/Autorzy: Mariusz Dramski

Rok: 2017

Słowa kluczowe: inductive mining, ship’s route

Abstrakt: Every ship’s route can be treated as some set of sequences consisting of some activities. This set is called a process. The process can be a subject of further research leading to it’s improvement and ensure e.g. the operational support. One of the techniques used in this task is inductive mining. Inductive mining is a simply and efficient approach to build a model of the process. In this paper an example of such research is described. The data was obtained by tracking the real route - the yacht going from Szczecin (Poland) to Las Palmas de Gran Canaria (Spain). The event log (the data) is very various due to the specific type of the cruise. This fact leads to observe some interesting conclusions in modeling of the process.

ISBN: 978-1-138-29762-3

Tytuł: Network model of the shortest path selection in transport

Autor/Autorzy: Mariusz Dramski, Marcin Mąk, Waldemar Uchacz

Miejsce publikacji: Telematics - Support for Transport. TST 2014. Communications in Computer and Information Science, vol 471. Springer, Berlin, pp. 369-375

Rok: 2014

Słowa kluczowe: network model, optimization, shortest path, restricted area, Dijkstra algorithm, graph’s theory

Abstrakt: The network models are often used to solve transport problems. In this paper authors propose such application in the field of finding optimal path in transport. Furthermore, a comparison with other known methods is described. This paper touches only the theoretical aspect of transport problems, but the results can be successfully applied to real transport systems.

Tytuł: Algorithm of Solving Collision Problem of Two Objects in Restricted Area

Autor/Autorzy: Mariusz Dramski, Marcin Mąka

Miejsce publikacji: Activities of Transport Telematics. TST 2013. Communications in Computer and Information Science, vol 395. Springer, Berlin, pp. 251-257|

Rok: 2013

Słowa kluczowe: navigation, collision problem, restricted area

Abstrakt: The main task of navigation is to conduct an object from departure point to destination. It’s natural that there is a need to consider all the limitations such coastlines, existing regulations etc. Safety requires also to observe all the dynamic objects which are able to change their position, course, speed etc. This paper presents the proposal of an algorithm of solving this problem for two or more moving objects in restricted area.