River cruising is well developed in Europe, particularly in the western, central, and some southern regions, and river tourism has expanded visibly during the current decade. A number of highly attractive tourist destinations are located upon rivers, the prime rivers used for cruises being the Danube, Rhine, Maine, Elbe, Loire, and Seine. The topic of this paper is an analysis of European river cruising and the determinants affecting this tourist product. In particular, the paper analyses the current state of river cruising in Poland, as well as the threats and opportunities that act as drivers for such cruising activity. This paper aims to identify and rank the main problems facing river cruising in Poland compared with prime destinations in Europe. River cruising has great potential, but it requires the removal of barriers and the addition of primary infrastructure.

In the article, an analysis of the impact of outlays for R&D and intellectual property products on the GDP dynamics in European Union countries from 2009–2018 was made based on a theoretical foundation. Two hypotheses were formulated: (1) The higher the share of outlays for R&D in the GDP, the higher the GDP dynamics; (2) The higher the share of investments in intellectual property products in GDP, the higher the GDP dynamics. The hypotheses were not confirmed by statistical data analysis.

This article presents the participatory budget as a tool to support the sustainable development of a city, and in particular using it as the budgeting model of the city of Szczecin and the effects of using it. Based on a critical literature review, the first part of the article shows the connections between good governance and sustainable development. The meanings of the basic concepts in this respect are presented, as well as a simplified model of the construction of the sustainable development concept. Next, public participation tools were described, and participatory budgeting was defined as one of the tools applied in good governance, constituting the basis of sustainable city development. The latter part of the article describes the models of participatory budgeting based on a literature research and an analysis of selected cases. The second part of the article is of an empirical nature. The results of the literature research are juxtaposed with the management practices of the city of Szczecin, where participatory budgeting has used since 2014. In this part of the article, the qualitative single-case study method was applied to analyse and synthesise the strategic city development directions and participatory budget between 2014 and 2019. Their compliance with the concept of sustainable development was also verified. Finally, conclusions drawn from the performed research are presented.

Soil contaminated with crude oil has negatively affected some of the communities in Ekiti State region in Nigeria. There is an increased interest in microbial lipases because of their enormous potential in industrial and biotechnological applications. This study investigated the characteristics of partially-purified lipase from Pseudomonas aeruginosa isolated from oil-contaminated soil in Ado-Ekiti, Ekiti State. The lipase was purified by gel-filtration, having a molecular weight of 39.11 kDa, with Km and Vmax values of 12.50 and 28.86, respectively. The enzyme had an optimal pH of 8.0 and exhibited its maximal activity at 50°C, whereas the relatively stable temperature and pH were 40°C and 5.0, respectively. The enzyme activity was enhanced by olive oil, which served as the carbon source. Sodium chloride enhanced lipase activity, while calcium chloride acted as mild inhibitor, and iron chloride acted a strong inhibitor. The lipase from Pseudomonas aeruginosa possessed properties of an industrial enzyme and will be useful for biodegradation and bioremediation studies

Plastic littering has recently become one of the most highly recognized dangers to the marine environment. The problem of marine plastic pollution is not new and was identified more than half a century ago. Recently, however, with increased media coverage and focusing events such as the discovery of the Great Pacific Garbage Patch, the problem can no longer be ignored. Several legal instruments address this problem. IMO norms aiming to reduce plastic debris were adopted 30 years ago. The MARPOL Convention includes annexes designed to help fight plastic debris. Other maritime legal instruments can also be leveraged to challenge this problem. As with other marine environment problems, the primary source of the problem, and thus the key to addressing it, is located on land. EU directives can serve as an interesting model for reducing marine pollution. The European Commission proposed new EU-wide rules in May, 2018 to target the 10 single-use plastic products most often found in Europe’s coastal habitats, as well as lost and abandoned fishing gear. Together these constitute 70% of all marine litter items. The adoption and implementation of this instrument may represent a game changing approach in the battle against marine pollution.

Dear Readers, In the opening words of this edition 58(130) I would like to thank all the readers for their growing interest in our journal. As editor-in-chief, I am pleased that there are new authors who want to publish their research in the pages of our quarterly, which includes articles in three major thematic categories: Navigation & Maritime Transport, Transportation Engineering, and Marine Technology & Innovation. The subject matter of the published papers will likely be expanded in the future, especially considering that the Scientific Journals of the Maritime University of Szczecin were submitted for evaluation by advisory teams appointed by the Ministry of Science and Higher Education in three disciplines: civil engineering and transport; mechanical engineering; environmental engineering, mining, and power engineering. Expanding the subject matter of the papers published in the Scientific Journals of the Maritime University of Szczecin will further improve the position of our journal at the national and international levels. I would like to announce to our readers that the quarterly Scientific Journals of the Maritime University of Szczecin (in accordance with decision No. 583/P-DUN/2019 dated 21 May 2019) has obtained co-financing for 2019–2020 from the Ministry of Science and Higher Education of Poland funds allocated for activities promoting science, including translation and proofreading. In this issue of Scientific Journals of the Maritime University of Szczecin, the results of fourteen research papers are presented in four sections: Marine Technology and Innovation, Navigation and Maritime Transport, Transport Engineering, and Miscellaneous. The first section, Marine Engineering & Innovation, contains four articles, the first of which presents a method to classify inland waterway ships based on images from a waterway monitoring system. The second article describes an innovative solution for automatic positioning using a visual system. In the third article, an experimental study on the hydrodynamic resistance of stepped planning hulls under different geometrical and physical conditions is presented. In the fourth article, the accuracy of defining the energy efficiency of drive systems is demonstrated by comparing hydrostatic drives using proportional engine speed control as an example. In the second section, Navigation and Maritime Transport, there are three articles. In the first article, a methods which accurately map the shoreline in Inland Navigational Charts using photogrammetric and sonar images is presented. The next article is devoted to analytical method to determine VHF marine communication bands. The last article in this section contains a research article describing the impact of temperature on the duration of the navigation season on the Oder border from 2004 to 2018. The third section, Transport Engineering, contains six articles. The authors of these articles describe the importance of inland waterway transportation in maritime and land transport systems and present the 6 Scientific Journals of the Maritime University of Szczecin 58 (130) current state and trends in the progressive development of inland waterway transport (infrastructure, means of transport, and impact of social media). Section four, Miscellaneous, contains one article which is dedicated to the overall average in Polish maritime law. Readers are invited to visit our web page http://scientific-journals.eu/, where they may find information about the article publication process, as well as full texts of articles from the current issue 58(130) and works published in previous issues of Scientific Journals of the Maritime University of Szczecin.

This article presents an analysis of the possibilities of using image processing methods for feature extraction that allows kNN classification based on a ship’s image delivered from an on-water video surveillance system. The subject of the analysis is the Hough transform which enables the detection of straight lines in an image. The recognized straight lines and the information about them serve as features in the classification process. Above all, this approach allows ships to be recognized, which can then be characterized by a specific representation and shape. Recreational units that are often seen on inland waters were classified correctly using this method. Each analyzed camera image was previously prepared – brought to the form where the ship was visible from the side and the background removed (they were monochromatic – white). The results obtained in this work will allow for the development of the final ship classification method based on camera images. This method is a significant part of the emerging system prototype, which is implemented as part of the Automatic Ship Recognition and Identification (SHREC) project.

The modern manufacturing or transportation machines that are used in industrial processes require continuous supervision in certain circumstances and even manual control by a human. Despite the fact the machines are more and more reliable and accurate than they used to be there is still the need for manual and time-consuming programming and safety control, especially when the external conditions change. For the operation of large machines, where the risk of damage and even disaster exists, an additional supervisory system based on vision devices could be utilized. The vision systems are commonly used in a range of simple 2D detection as well as very precise 3D reconstruction. The stereovision systems could be applied for unusual operations, especially in terms of safety and collision avoidance, such as crane observations while transporting a heavy load, robot and CNC machine preparation and normal operation. Through the use of optical devices the observed objects could be quickly positioned. In this research a test bench for stereovision reconstruction for the example of a robotic arm has been presented. The calibration procedures have been explained and accuracy tests in a large measuring volume were performed. Finally the possibilities of the applications and the utilization of such a system have been assessed.

In this paper, the hydrodynamic resistance of one-step planing craft has been experimentally investigated under different geometrical and physical conditions. For this to be accomplished, a Fridsma body model with different deadrise angles was considered. Moreover, the effect of the longitudinal distance of the step from the transom and the step height on the hydrodynamic resistance of a stepped planing craft has been evaluated at different hull velocities. According to the experimental results, frictional resistance can be enhanced by decreasing the height of the step. However, a greater total resistance can be obtained by increasing the longitudinal distance of the step from the transom. Moreover, it was found that the proportionality of the longitudinal distance of the step from the transom to the step height has a remarkable effect on the hydrodynamic efficiency of the step in stepped planing craft.

The aim of the article is to look at the possibility of accurately determining the energy efficiency of drive systems. The results of experimentally determined efficiencies and the efficiencies determined from simulations of two hydrostatic systems with throttling control and fed by a constant capacity pump were compared. The research apparatus was very precisely designed, made and automated. The measuring instruments that were used are characterized by their high measuring accuracy. The issues related to the determination of the energy losses and the energy efficiency of the hydraulic motor or drive system, which should be determined as dependent on the physical quantities independent of these losses, were also discussed. A Paszota diagram of the power increase in the direction opposite to the direction of the power flow, replacing the Sankey diagram of the power decrease in the direction of the power flow in the hydraulic motor or in the drive system, was analyzed. The results showed that a Paszota diagram opens up a new perspective on research on the power of energy losses and energy efficiency of hydraulic motors and drive systems.

Shoreline mapping is one of the key stages in navigational charting. In terms of navigation, the shoreline marks the boundary of a river, which is often equivalent to the navigable water area. In cartographic terms, it is an important topological element between different objects that are adjacent to it. Currently, topographic objects are often mapped using photogrammetric materials obtained from various altitudes – satellite, airborne or low, which is associated with the use of an airborne UAV. Depending on the type of materials, the shoreline can be obtained in vector form with differing situational accuracy and differing degree of detail. In addition to the standard methods of processing vector data, the research in this paper also included the use of sonar images, enabling the detection of the shoreline with the use of a surveying hydrographic unit. On the basis of the collected photogrammetric and sonar images of different spatial resolution, an analysis of the accuracy of shoreline mapping was performed in terms of the situational accuracy and the level of detail in its representation. The results of the research provided the basis for the determination of dedicated remote sensing materials enabling the development of maps for inland navigation.

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).

The paper presents the impact of the weather on inland navigation conditions. Each mode of transportation depends on the weather, but inland navigation is the one most affected by it. Inland navigation is strongly dependent on the water level in a river bed, which is a result of weather conditions. In Poland the depth of inland waterways is relatively low, but the biggest consideration is the weather which results in the variability of this level. The variability of hydrotechnical conditions results in problems with planning for transportation. It is widely known that water is one of the most important factors in the hydrotechnical conditions of inland navigation and it is directly correlated with the weather. In this paper the authors present the impact of temperature on the duration of the navigation season on the Border Oder, based on research conducted in the years from 2004 to 2018 and the authors also investigated important changes in the weather conditions during last few years. The results showed that the number of navigable days has dropped significantly over the investigated period as a result of changes in the climate.

Entrepreneurs in the transport and forwarding services field are looking for new areas of activity to ensure a competitive advantage over their competitors. Currently, with relatively balanced price levels and service quality, the acquisition and retention of clients can ensure success in the market and marketing activities. The approach to marketing activities has changed over the years. Currently, marketing 2.0 is used, which is focused on the customer, their needs, and preferences. Marketing 3.0 is also used, which introduces a broader customer perspective. The area of activity, which is part of the new marketing 3.0 concept, is social media, currently used by over one billion people globally. Such a large group means a regular flow of information which is highly important for businesses. Research has shown that companies use social media primarily for promotion, to recruit new employees, and contact contractors. Internet tools are the most widely used distribution channel of services in the industry. Over half of the surveyed enterprises indicated that they planned to increase social media in their company’s marketing activities. A positive trend may indicate that transport and forwarding companies may plan to increase their future use of this channel for marketing activities.

The main subject of this research was to identify recent basic trends in the development of inland waterway transport in the EU as well as to evaluate this from both EU transport policy objectives and logistics markets’ requirements. For this purpose, classical statistical and economic analysis methods as well as the documentation research method were used. The basic threats and barriers to the development of inland waterway transport are indicated, as well as various actions necessary to limit or eliminate them. An attempt was also made to assess the opportunities and prospects for the development of this transport mode in the next decade in the context of the development of the broader EU transport market. The main objective of this research was to perform a market assessment of the development prospects of this mode of transport in the era of dynamic developing logistic customer service standards, as well as progressive globalization and the 4th industrial revolution (digitalization). In this respect, political versus market-oriented scenarios of the development of EU inland shipping were analyzed and evaluated. The conclusions relate to the ongoing and upcoming modal shift on the EU transport market as well as regulatory measures undertaken by the EU.