<abstract xmlns="http://www.w3.org/1999/xhtml">Some generalizations of the Poisson process and their properties are presented in the paper. The non-homogeneous Poisson process allows to construct a probabilistic model describing the different kinds of accidents number. The nonhomogeneous compound Poisson process enables to describe mathematically the various types of accidents consequences. Theoretical results give possibility to anticipate the accidents number and their consequences.</abstract>

Nonhomogeneous Stochastic Processes Connected to Poisson Process

<abstract xmlns="http://www.w3.org/1999/xhtml">This article is one of the series dedicated to the <italic>DiveSMART Baltic</italic> project conducted to better coordination of international underwater rescue operations in the Baltic Sea. The project <italic>DiveSMART Baltic</italic> has received Flagship status.The article is the forth in the planned cycle of articles referring tasks realised in the Naval Academy in the framework of <italic>DiveSMART Baltic</italic> project. This article describes selected decompression procedures for victims who became saturated by air at maximum depth to <italic>H</italic> =30 <italic>mH</italic>2<italic>O</italic> in the air pockets of the hull of a sunken wreck. This subject is associated with the work package four <italic>‘Medical treatment’ of the DiveSMART Baltic project: Identifies methods for different medical treatments in operational areas</italic>.</abstract>

Selected Decompression Procedures for Survivors Who Became Saturated in a Sunken Wreck

<abstract xmlns="http://www.w3.org/1999/xhtml">This paper presents the dynamic mechanical properties of austenitic steel with improved durability, which is used in the construction of hulls of minesweepers, mine destroyers, submarines and other naval vessels. Dynamic tensile tests performed on the steel samples using a rotary hammer with a strain rate of up to 1000 s-1 allowed determination of elastic-plastic characteristics of the material in the form of a polynomial of Johnson-Cook constitutive model, taking into account the influence of strain rate and temperature. A characteristic of this type is utilized in numerical calculations in the CAE software. The obtained characteristics were experimentally verified by bending tests of flat samples with a drop-weight type impact hammer. Simultaneously numerical calculations were performed in order to compare the deformation state.</abstract>

Determination of Dynamic Characteristics of Austenitic Steel to be Utilized in Fem Simulation and its Verification

<abstract xmlns="http://www.w3.org/1999/xhtml">In order to first Baltic LNG terminal in Świnoujście construction, issues concerning maritime critical infrastructure protection as a part of Maritime Security appeared. With the increasing natural gas demand LNG terminal in Świnoujście could be a possible terrorist attack target as well as the LNG carriers crossing the choke point of Baltic Straits and sailing through the littoral waters of Polish and other Baltic counties coastline. Experts do not fully agree on possible effects and results of successful terrorist assault on LNG carrier at sea nor at harbor.Unmanned platforms begin to play prominent role in military, oceanography or academic applications. With the announcement of reducing the hazard for deck operators especially in high-risk regions, it is predicted that unmanned platforms will play crucial role in Maritime Security systems in the nearest future. This paper discusses the design of the USV dedicated to LNG terminal protection tasks introduces potential equipment options and missions scenarios of first Polish unmanned platform ‘Edredon’.</abstract>

Unmanned Surface Vehicles in Maritime Critical Infrastructure Protection Applications — LNG Terminal in Świnoujście

<abstract xmlns="http://www.w3.org/1999/xhtml">The paper presents the second part of the final report on all the experiments with biomimetic autonomous underwater vehicle (BAUV) performed within the confines of the project entitled ‘Autonomous underwater vehicles with silent undulating propulsion for underwater ISR’, financed by Polish National Center of Research and Development. The report includes experiments on the swimming pool as well as in real conditions, that is, both in a lake and in the sea. The tests presented in this part of the final report were focused on navigation and autonomous operation.</abstract>

Polish Naval Academy, Faculty of Navigation and Naval Weapons

Polish Naval Academy, Faculty of Mechanical and Electrical Engineering

Report on Research with Biomimetic Autonomous Underwater Vehicle — Navigation and Autonomous Operation

<abstract xmlns="http://www.w3.org/1999/xhtml">In the recent years, a dynamical development of an underwater robotics has been noticed. One of the newest group of underwater robots are biomimetic underwater vehicles. These vehicles are driven by undulating propulsion imitating fins of underwater creatures, e.g. a fish, a seal, etc.This paper undertakes problem of thrust measurement of new biomimetic underwater vehicle equipped with undulating propulsion. At the beginning, the stand for thrust measurement is described. Then, two constructions of BUVs imitating a fish and a seal are presented. Further, the results of thrust measurement for two different undulating propulsions are inserted. At the end of the paper containing conclusions from performed measurements and foreseen research is included.</abstract>

Thrust Measurement of Biomimetic Underwater Vehicle with Undulating Propulsion

<abstract xmlns="http://www.w3.org/1999/xhtml">In this paper a results of a static analysis of the tubular linear electromagnetic actuator is presented. The linear actuator consist of two parts: a cylindrical unmovable coils surrounded by a soft ferromagnetic case, and a runner made from sequence of permanent magnet with a soft ferro-magnetic gasket. In the first part of the paper the analytical method was performed for preliminary analysis. In the second part of the paper the more detailed analysis was depicted with using finite element method (FEM). The magnetic circuit shape and impact of selected dimensions on static characteristics is presented. Then the axial and radial electromagnetic force as a function of the runner dimensions were analysed.</abstract>

Static Analysis of the Tubular Electromagnetic Linear Actuator with Permanents Magnets

AHEAD OF PRINT

Volume 224 (2022): Issue 1 (March 2022)

Volume 223 (2020): Issue 4 (December 2020)

Volume 222 (2020): Issue 3 (September 2020)

Volume 220-221 (2020): Issue 1-2 (June 2020)

Volume 219 (2019): Issue 4 (December 2019)

Volume 218 (2019): Issue 3 (September 2019)

Volume 217 (2019): Issue 2 (June 2019)

Volume 216 (2019): Issue 1 (March 2019)

Volume 215 (2018): Issue 4 (December 2018)

Volume 214 (2018): Issue 3 (September 2018)

Volume 213 (2018): Issue 2 (June 2018)

Volume 212 (2018): Issue 1 (March 2018)

Volume 211 (2017): Issue 4 (December 2017)

Volume 210 (2017): Issue 3 (September 2017)

Volume 209 (2017): Issue 2 (June 2017)

Volume 208 (2017): Issue 1 (March 2017)

Volume 207 (2016): Issue 4 (December 2016)

Volume 206 (2016): Issue 3 (September 2016)

Volume 205 (2016): Issue 2 (June 2016)

Volume 204 (2016): Issue 1 (March 2016)

Maritime Technical Journal

 Scientific Journal of Polish Naval Academy has been published since 1959 (in electronic version since 2004). Every year four volumes are published. In this Journal Authors publish their original and previously unpublished scientific articles in the area of technical sciences in English. All the articles contain Polish summaries and key words. All the articles are reviewed by two reviewers. The list of reviewers is published once a year. The Journal has online and printed versions. Why subscribe and read  In the Journal one can find original scientific articles from technical fields, mainly Mechanical Engineering, Electrical Engineering, Geodesy and Cartography. ‘Scientific Journal of Polish Naval Academy’ is an excellent platform for exchanging knowledge and experiences for scientists and experts. Each new issue of the Journal contains articles which present high quality research results of Polish specialists and is an excellent source of professional knowledge for the recipients.  Why submit  Our Journal offers review procedure and short deadlines between sending of the article and approval for publication. All articles are available in Open Access.  The journal has no article processing charges (APCs) and submission processing charges.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 