No abstract

Urban areas are centres of business and innovation. Freight transport is indispensable for the proper functioning of any modern urban society. Urban areas cannot function without an appropriate freight transport system, due to the need to replenish stocks of food and other goods in retail shops. The complexity of the decisions concerning implementation of measures to improve the movement of goods in the city requires tools designed to support this process. In this context, a research gap and a research problem occur-how to obtain a reliable set of factors for development of sustainable urban freight transport (UFT). The purpose of this article is to introduce the possibility of applying the Analytic Hierarchy Process (AHP) as well as the Decision Making Trial and Evaluation Laboratory Method (DEMATEL) in choosing a set of measures and in analysing the field of distribution logistics, which will help to solve delivery problems and streamline cargo flow in Szczecin, in the context of sustainable development. This paper presents the findings of a survey in which experts evaluate the main coefficients for sustainable freight transport in the city area. Using both AHP and DEMATEL methods, we have concluded that: (i) all coefficients from administrative, financial, technical and promotional measures are highly interconnected; (ii) strategy of freight transport development should take into consideration how these coefficients influence each other; (iii) P2-eco-driving trainings, T4-alternative delivery systems and P1-promotional campaigns for sustainable transport are the most important criteria and should be priorities for investments; (iv) A1-implementation of loading/unloading and transit restrictions-highly influences other coefficients; (v) T2-intelligent route guidance in freight transport is greatly influenced by them.

SUMMARYThis paper is intended to give some information about how to build a model necessary for bending analysis of rectangular and circular plates resting on a two-parameter elastic foundation, subjected to combined loading and permitting various types of boundary conditions. The formulation of the problem takes into account the shear deformation of the plate and the surrounding interaction e!ect outside the plate. The numerical model based on an 18-node zero-thickness isoparametric interface element interacting with a thick Reissner}Mindlin plate element with three degrees of freedom at each of the nine nodes, which enforce C continuity requirements for the displacements and rotations of the midsurface, is proposed. Sti!ness matrices of a special interface element are superimposed on the global sti!ness matrix to represent the sti!ening elastic foundation under and beyond the plate. Some numerical examples are given to illustrate the advantages of the method presented.

IT technologies related to Industry 4.0 facilitate the implementation of the framework for sustainable manufacturing. At the same time, Industry 4.0 integrates IT processes and systems of production companies with IT solutions of cooperating companies that support a complete manufactured product life cycle. Thus, the implementation of sustainable manufacturing implies a rapid increase in interfaces between IT solutions of cooperating companies. This, in turn, raises concerns about security among manufacturing company executives. The lack of a recognized methodology supporting the decision-making process of choosing the right methods and means of cybersecurity is, in effect, a significant barrier to the development of sustainable manufacturing. As a result, the propagation of technologies in Industry 4.0 and the implementation of the sustainable manufacturing framework in companies are slowing down significantly. The main novelty of this article, addressing the above deficiencies, is the creation, using the combined DEMATEL and ANP (DANP) and PROMETHEE II methods, of a ranking of the proposed three groups of measures, seven dimensions and twenty criteria to be implemented in companies to ensure cybersecurity in Industry 4.0 and facilitate the implementation of the sustainable production principles. The contribution of Industry 4.0 components and the proposed cybersecurity scheme to achieve the Sustainable Development goals, reducing the carbon footprint of companies and introducing circular economy elements was also indicated. Using DANP and PROMETHEE II, it can be concluded that: (i) the major criterion of cybersecurity in companies is validation and maintaining electronic signatures and seals; (ii) the most crucial area of cybersecurity is network security; (iii) the most significant group of measures in this regard are technological measures.

This article presents the idea of modelling and supporting the decision-making process in the field of development directions of a sustainable transport system in a metropolitan area. The global COVID-19 pandemic is causing changes in the perception of the public transport system by passengers. Users’ concerns for their own safety may lead to a shift away from public transport. Policy makers are advised to pay attention to these new phenomena that are hindering the development of sustainable transport in urban areas. Thus, many projects for the development of sustainable urban transport mobility, prepared before COVID-19, require re-analysis and adaptation to the decision-making processes of choosing the preferred means of transport by citizens. The scientific aim of this article was to develop a mathematical model based on the hybrid DEMATEL-PROMETHEE II method, supporting city decision-makers in the decision-making process regarding the selection of appropriate measures supporting the development of sustainable transport. The issues covered in the article include economic, informational and legal aspects, including electromobility, the principles of a low-emission society, and sustainable collective transport. The model was prepared for the needs of the Szczecin Metropolitan Area, where the construction of the Szczecin Metropolitan Railway, delayed by COVID-19, is underway and is to be the main axis of the public transport system. Finally, the article provides a ranking of groups of measures, dimensions and criteria that should be taken into account by decision-makers and planners in the modified plans for the sustainable development of metropolitan transport systems in the period after COVID-19.