<abstract xmlns="http://www.w3.org/1999/xhtml"> In the article the definition of IED has been presented as well as its classification and countering methods. The concept of AEGIS device for neutralization of RCIED has been presented. The usage possibility of AEGIS device in civilian environments has been analysed.</abstract>

Analysis of the Usage Possibility of the Electromagnetic Curtain

<abstract xmlns="http://www.w3.org/1999/xhtml"> The paper presents results of research based on analysis of ice conditions in the Baltic Sea and in the Puck Bay. Analyses are concerned on the last century the maximum ice extents in the Baltic Sea (1915-2015) and ice conditions in the Puck Bay (1986-2005). Ice conditions in the Baltic Sea are generally of average intensity and depend mainly on the type of winters (mild, average/ normal and severe), however, the Baltic bays and gulfs cover the sea ice almost every year. The average ice extent in the Baltic Sea during typical winters, the ice extent in the Baltic Sea during winters in years from 1915 to 2015 and the average time limits the occurrence of the first ice, number of days with ice, ice thickness, terms the disappearance of the last ice in the Puck Bay together with examples of ice forms are presented in this paper. The phenomenon of ice has a significant impact on human activities in the sea, have an effect on weather and climate, plant and animal life, fishery and ports activities and the safety of navigation.</abstract>

Analysis of Ice Conditions in the Baltis Sea and in the Puck Bay

<abstract xmlns="http://www.w3.org/1999/xhtml"> In the paper a general concept of the 5G network architecture is presented as well as system requirements having impact on innovative solutions in the 5G network are highlighted. A major part of the paper is both presentation and discussion of the problem of Cloud Radio Access Network introduction for public networks in which the cell and resource virtualisation will be implemented. On the other hand, the problem of resource virtualization in the STRUGA system is discussed in which the C-RAN implementation is proposed for performance improvement.</abstract>

Towards 5G – C Loud-Based Radio Access Networks

<abstract xmlns="http://www.w3.org/1999/xhtml"> This paper presents the implementation process of the design methodology for ocean waves in a laboratory tank using a wave generator, which is the basis for conducting hydrodynamic model scale research involving real sea conditions. The main focus is placed on generation of time sequences used as the control input for the wave generator and experimental verification methods for the generated waves and concluding with the results and validation of the developed process by achieving wave parameters sufficiently aligned with the theoretical model.</abstract>

Signal Generation and Verification Process for the Physical Modeling of Ocean Waves

<abstract xmlns="http://www.w3.org/1999/xhtml"> This article is based on an analysis of missions carried out by unmanned surface vehicles (USVs). It discusses measures taken in Poland to develop such vehicles, designed to provide support to operations conducted by the country’s maritime services, security and monitoring of seaports and critical objects. It summarizes the results of research and development efforts and presents a new approach to employing these vehicles throughout the world.</abstract>

Polish Experience in Developing and Employing Unmanned Surface Vehicles At Sea

<abstract xmlns="http://www.w3.org/1999/xhtml"> The paper presents issues related to the cooperative communication in wireless networks. Cooperative communication involves the use of mobile terminals as relay stations to improve the transmission quality, improve network performance and reduce energy consumption. It is also possible to use several different data transmission standards. The paper presents the methods used to implement cooperative communication. The types of cooperative communication networks are also presented.</abstract>

Overview of Cooperative Communication Methods

<abstract xmlns="http://www.w3.org/1999/xhtml"> The high operational cost of exploitation of armaments in near-battle conditions and numerous restrictions in use of the battle equipment in places of permanent deployment have contributed to seek new training methods. In recent years, there has been a rapid development of simulators used in the process of education and in-service training associated with the technological advancement and the modernization of the armed forces of the Republic of Poland. In this article, an experimental model of the simulator was introduced for the operator of manual tracking (RS) using a visual system. This model was built by the authors as part of their master’s thesis. It allows either manual or automatic tracking of targets against the simulated background and gives a grade to the operator based on the accuracy achieved while tracking the target. The solution suggested by the authors may raise the effectiveness of training of operators using television- optical systems, as well as reduce the associated operating costs of the weaponry.</abstract>

Simulator for the RS Operator Using Visual Depiction

<abstract xmlns="http://www.w3.org/1999/xhtml"> This paper presents concept and implementation of digital phase-location system, designed as a navigational aid for marine applications. Main feature of proposed system is the ability to work in both synchronous mode, with one master station and set of slave stations synchronized with master, and in asynchronous mode with independent clocking of all stations.</abstract>

Digital Phase - Location System for Marine Applications

<abstract xmlns="http://www.w3.org/1999/xhtml"> In this paper, there has been constructed such a model of a non-classical Bittner operational calculus, in which the derivative is understood as a forward difference Δn{x(k)}:={x(k+n)-x(k)}. Next, considering the operation Δn,b{x(k)}:={x(k+n)-bx(k)}, the presented model has been generalized.</abstract>

An Operational Calculus Model for the nTH – Order Forward Difference

AHEAD OF PRINT

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

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

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

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

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

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

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

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

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

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

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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. 