Critical infrastructure facilities, especially those located close to urban agglomerations, can cause serious difficulties for tourists. An example of such a situation is Poland’s only sea-land LNG terminal located in one of Poland’s three seaports of strategic importance to the national economy, Świnoujście. This port is located in the center of the city, which borders Germany, and is a very popular sea resort for both compatriots and foreign tourists. On the basis of a critical analysis of the literature, a comparative analysis, and the method of inductive-deductive reasoning, the authors point out a research gap in the field of transportation problems in critical infrastructure areas. The purpose of this article is to present current transportation problems resulting from the introduction of a closed transportation zone within critical infrastructure. In this article, the authors focus on presenting the effects of the aforementioned restriction on the tourism economy. One of them is a reduction in the ability to reach important historical sites and, thus, a significant decrease in interest in these monuments. The authors, with the help of observations, interviews, and a comparative method, analyzed possible solutions to transportation problems and proposed the most favorable solution. The proposed scenarios include three modes of transportation: road, rail, and water. Currently, the only possible solution is water transport. Consequently, the authors proposed an innovative and inviting means of transport for tourists, which is electric water cabs. An analysis of the effectiveness of such boats is made, and their additional added value for the environment and the image of the city and port as nature-friendly are pointed out.
1 stycznia 2025 roku Polska przejęła drugą w historii 6-miesięczną prezydencję w UE. Z tej racji Zespół Doradców Gospodarczych TOR przygotował raport prezentujący innowacje, jakie zostały wprowadzone w obszarze polskiego transportu.
Rozporządzenia UE w sprawie elektronicznych informacji o transporcie towarowym eFTI (electronic freight transport information) to ramy regulujące elektroniczną wymianę informacji w transporcie towarowym w całej Unii Europejskiej.
Warunki transportu produktów leczniczych i wyrobów medycznych, takie jak temperatura, czas transportu, ekspozycja na światło słoneczne, warunki higieniczne, zabezpieczenia opakowań itp. są niezwykle ważne i mają wpływ na jakość produktów. Obok całego szeregu ogólnych wymagań w tym zakresie warto przyjrzeć się dodatkowym wyzwaniom na gruncie dostaw do szpitali w ramach umów o zamówienie publiczne.
A sustainable approach to aircraft noise requires not only design changes to engines and aircraft, but also improved methods for modelling noise and its propagation through the air. The article continues the authors' holistic view of the problem of aircraft noise, also taking into account data from military aviation. First, the social and health problem of aircraft noise is recalled. Then the theoretical basis in acoustics and modern aviation noise modelling tools are presented, as well as selected research projects carried out in Sweden to assist in the reduction of aircraft noise. In the results of the study, an addendum to the mathematical description of airborne noise propagation and examples are presented. In conclusion, the authors' insights from their research are indicated.
PL
Zrównoważone podejście do hałasu lotniczego wymaga nie tylko zmian konstrukcyjnych silników i samolotów, ale również doskonalenia metod modelowania hałasu i jego propagacji w powietrzu. Artykuł kontynuuje prezentację holistycznego spojrzenia autorów na problem hałasu lotniczego, z uwzględnieniem danych również z lotnictwa wojskowego. Na początku przypomniano problem społeczny i zdrowotny hałasu lotniczego. Następnie przedstawiono podstawy teoretyczne z akustyki i współczesne narzędzia modelowania hałasu lotniczego oraz wybrane projekty badawcze realizowane w Szwecji, mające na celu wspomaganie redukcji hałasu lotniczego. W wynikach badań przedstawiono uzupełnienie opisu matematycznego propagacji hałasu w powietrzu i przykłady. W podsumowaniu wskazano spostrzeżenia autorów z przeprowadzonych badań.
The development of road transport based on electric trucks requires appropriate charging infrastructure and the adaptation of service facilities to the specific demands of new technologies. This article aims to identify the hazards associated with operating charging stations and service facilities that cater to electric trucks. These facilities' technical, physical, and IT security aspects are discussed, and relevant legal regulations and technical standards are highlighted. The conclusions underscore the need for close collaboration among charging station operators, service facility operators, vehicle manufacturers, and market regulators.
The engine is one of the most important and complex parts of the car. Most of the breakdowns occur in the piston group of the internal combustion engine, especially in the compression rings. This article presents a new design for an innovative repair kit for transport equipment units. Article considers new principles and effects for reducing friction in vehicle units. The main difference of the new solution is the use of spring rings instead of simple installation of compression piston rings. The main goal of functional tuning is to increase the strength and technical indicators of friction between piston rings and cylinder liner. New technology decreases the natural wear of piston rings and the integrity of piston grooves in which the rings are installed. Moreover, new kit improves seals and increases shock absorption when the combustible mixture ignites. Suggested spring kit is tested in virtual environment with all with external factors and processes that can affect the operation of the spring. Based on the results of the experiments and mathematical calculations, suggested kit can work under the real working conditions without any deformation and losing functionalities.
To acquire raw materials and distribute products, agri-food processing companies need to operate at long distances, which is associated with high energy costs and an increased negative impact on the natural environment. Many methods have been developed to reduce energy consumption in transport. One approach that stands out is optimization of transport routes, which provides benefits while incurring hardly any extra costs. In this paper, an attempt was made to modify the ILS-RVND metaheuristic by adjusting its components to the specific character of the problem being solved so that they could yield the expected results with regard to the quality of returned solutions and the time in which they were generated. A group of local search algorithms, Swap (2-1), Cross-exchange (2-1), 3-opt, Or-opt (2) and Displacement, were analyzed. The results of this analysis were used to formulate the final version of the metaheuristic. The efficiency of the algorithm was evaluated using test cases. The solutions generated by the metaheuristic produced considerable improvement in the objective function (70.99% on average) and were obtained within an acceptable time (on average 24.66 CPU seconds).
PL
Pozyskiwanie surowców i dystrybucja produktów wymaga od przedsiębiorstw przetwórstwa rolno-spożywczego pokonywania znacznych odległości, co wiąże się z wysokimi wydatkami energetycznymi oraz zwiększonym negatywnym oddziaływaniem na środowisko. Opracowano wiele metod mających na celu ograniczenie zużycia energii w transporcie. Jednym z wyróżniających się podejść jest optymalizacja tras przejazdów, która zapewnia znaczne korzyści przy ograniczonych nakładach. W pracy podjęto próbę modyfikacji metaheurystyki ILS-RVND poprzez dostosowanie jej elementów do specyfiki rozpatrywanego problemu w celu osiągnięcia poprawy jakości zwracanych rozwiązań oraz skrócenia czasu ich generowania. Przeanalizowano grupę algorytmów przeszukiwania lokalnego: Swap (2-1), Cross-exchange (2-1), 3-opt, Or-opt (2) oraz Displacement. Wyniki wykorzystano do określenia ostatecznej postaci metaheurystyki. Efektywność algorytmu oceniano przy użyciu przypadków testowych. Rozwiązania generowane przez metaheurystykę przynosiły znaczną poprawę funkcji celu (średnio 70,99%) i były otrzymywane w akceptowalnym czasie (średnio 24,66 sekundy CPU).
Materials with good mechanical and chemical properties (materials should be resistant to various types of corrosion) are proposed for the various structures of means of transport. For this reason, high-alloy steels, including duplex steels, are increasingly used in the automotive industry. The 1.4462 duplex steel used in means of road transport steel could be treated as an interesting high-strength stainless material used in the automotive industry. Generally, duplex steels have a high resistance to localized and uniform corrosion. The duplex and superduplex steels are assumed to be rather proper weldable materials; however, cracks could be observed both in the heat-affected zone (HAZ) and in the weld. The article analyses the influence of tubular cored metal arc (136) with active gas shield welding (process 136) parameters on the arrangement of correct joints used in tanker truck elements, as an example of welding in the automotive sector. Various mechanical tests checking the properties of joints were realized. The goal of the paper is to choose the correct welding parameters for elements of 1.4462 steel. The construction elements of a tanker truck are made by the 136 method of welding.
Scraper chains are the main transport cables of scraper conveyors. Problems related to the processes of destruction of link chains used in these conveyors are described. Design of scraper chains and their division into different types for use in scraper conveyors are presented. The most common damages to chains used in scraper conveyors are presented and the reasons of their wear are discussed.
In the structure of excavators and other transport vehicles, it is observed that there is an increasing necessity to weld elements from the Hardox steels. The paper verifies the possibility to obtain accurate DMW (dissimilar metal welds from totally different grades of Hardox 450 steel with S355J2 steel). The microstructure and mechanical tests of the obtained various welds were analysed. Argon-based shielding gases with micro nitrogen additions were used for MAG welding. Gas mixtures with micro nitrogen additions of up to even 2000 ppm and their use in welding are an absolute novelty. The purpose of the manuscript was to find the correct parameters of making dissimilar joints with such modern mixtures and to determine the most suitable mixture for welding Hardox steel and low-alloy steel for use in the automotive industry.
The article presents the problem of the cargo transport with the example of a selected mode of transport in Poland. The volume of goods transported by air transport in 2010-2021 was analysed. Cargo transport in air transport is very popular. From year to year, there is an increase in the volume of transported goods. The coronavirus pandemic, and the related economic crisis did not significantly affect cargo transport, as was the case with passenger transport, the number of which decreased significantly during the pandemic.
Innovative technologies that use artificial intelligence in transport solutions recently emerging around the world include, among others issues of autonomous vehicle driving. The use of autonomous vehicle technology affects the issues of civil liability (liability and insurance), road safety, natural environment (energy efficiency, renewable energy sources), data (access, exchange, protection, privacy), IT infrastructure (effective and reliable communication), employment (creation and loss of jobs, training of truck drivers in the use of automated vehicles). The development of new technologies related to artificial intelligence, including autonomous vehicles, generates inevitable changes in law, economy and society. It is inevitable due to the fact that autonomy is undoubtedly a means to achieve the goal of improving the efficiency sought in every area of life. The article presents arguments confirming the thesis that the basic factor inhibiting the implementation of autonomous vehicle technology is the problem of artificial intelligence, including its definition and legal regulation.
In this study, the main objective was to detect the road network and key road infrastructure elements based on airborne laser scanning data. The study included identification of the road network and determination of its axes using three independent methods, as well as detection of horizontal signs such as pedestrian crossings. The analysis process was based mainly on digital image processing methods, based solely on lidar data, without using information from other sources. The results of the analysis showed that the use of lidar data provides a fast and effective method for continuously updating information on road infrastructure and expanding the transportation database. This potentially opens the door to effectively updating relevant data in the area of transportation infrastructure.
Improving the level of accessibility of integrated interchanges and providing free movement for people with special needs is one of the currently most important transport issues raised by a numer of centres. Over the last two decades, several attempts have been made to develop solutions to enhance mobility, e.g. more links between destinations, opening national borders in the European Union, pursuing an open skies policy etc. However, a universal safety management system for people with special needs at integrated interchanges is still not in place. The aim of this article is to enhance elements of a safety system for people with special needs at integrated interchanges consisting of lists (directories) of people with special needs. The article uses theoretical methods such as analysis and synthesis and presents an outline of barriers to create a catalogue of barriers and amenities found at integrated interchanges, taking into account people with special needs. Also noteworthy is a catalogue of people with special needs, which includes a broad group of public transport users. The paper presents a matrix of barriers and amenities based on groups of people with special needs. Identified elements of transport infrastructure at integrated interchanges, such as revolving doors or contrasting elements, have been classified both as barriers and amenities for different user groups.
This paper takes the form of a comparative life cycle assessment (LCA) analysis of 40-foot steel and composite containers based on GaBi® software. Reducing greenhouse gas emissions can be undertaken, among other things, by reducing the weight of the container, which is possible if lighter materials with comparable mechanical properties to steel are used. The LCA analysis allowed us to estimate the energy consumed and the amount of greenhouse gases emitted during the production of a steel and composite container. It turned out that the energy consumed in the production of the composite and steel container is practically equal in value, provided that carbon fiber from the polyolefin precursor is used in production. The processes with the highest energy intensity for container production are carbon fiber and COR-TEN A® steel production and processing. Changing the container material from steel to composite would save fuel and greenhouse gas (GHG) emissions into the atmosphere by 5.1 % and 18.3 % for road transportation and sea shipping, respectively.
Purpose: Main novelty and the aim of the paper is to analyses possibility of dissimilar AG welding of two various grades of steel with significantly different structure. Design/methodology/approach: Two various metals have been checked in welding in order to obtain a high-quality joint of car body elements. The properties of the joint were checked by NDT (Non Destructive Test) and DT (Destructive Tests). Findings: Relations between MAG welding process parameters and the quality of joint. Research limitations/implications: In the future, it can be tested the effect of micro addition of nitrogen or oxygen in gas shielding mixtures of the MAG process. Practical implications: Suggested materials and innovation will not cause problems in the production process provided that the technological regime will be respected. Social implications: Modifying the welding materials and method will not affect the environment and production management methods. Producing of dissimilar welds must translate into production savings. Originality/value: The paper is addressed to manufacturers of low-alloy and advanced high strenth steel for automotive industry.
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