The present article presents an analysis of the potential application of 3D printing in the critical infrastructure system. An attempt has been made to develop case studies for selected critical infrastructure areas, particularly with reference to the area of energy supply. The need for 3D printing applications is identified based on expert research in the energy industry. It identifies the application schemes determined by the technical and logistical possibilities associated with 3D printing in its broadest sense. A review of additive technologies with a view to their application in selected phases of critical infrastructure operation, including in crisis situations, is also carried out. Furthermore, a methodology for incorporating 3D printing into the existing critical infrastructure system is proposed. As a result, the following research hypothesis is adopted: the use of 3D printing can be an important part of measures to ensure the full functionality and efficiency of critical infrastructures, particularly in crisis situations.

The energy security landscape that we envisage in 2050 will be different from that of today. Meeting the future energy needs of the armed forces will be a key challenge, not least for military security. The World Energy Council’s World Energy Scenarios forecast that the world’s population will rise to 10 billion by 2050, which will also necessitate an increase in the size of the armed forces. In this context, energy extraction, distribution, and storage become essential to stabilizing the imbalance between production and demand. Among the available solutions, Power to Hydrogen (P2H) is one of the most appealing options. However, despite the potential, many obstacles currently hinder the development of the P2H market. This article aims to identify and analyse existing barriers to the introduction of P2H technologies that use hydrogen. The holistic approach used, which was based on a literature survey, identified obstacles and possible strategies for overcoming them. The research conducted presents an original research contribution at the level of hydrogen strategies considered in leading countries around the world. The research findings identified unresolved regulatory issues and sources of uncertainty in the armed forces. There is a lack of knowledge in the armed forces of some countries about the process of producing hydrogen energy and its benefits, which raises concerns about the consistency of its exploitation. Negative attitudes towards hydrogen fuel energy can be a significant barrier to its deployment in the armed forces. Possible approaches and solutions have also been proposed to eliminate obstacles and to support decision makers in defining and implementing a strategy for hydrogen as a clean energy carrier. There are decisive and unresolved obstacles to its deployment, not only in the armed forces.

The objective of this article is to describe the system of defence education for Polish youth after 1989 and its transformations. The article indicates that in Polish primary and secondary schools today, the subject of security education is taught, and in some high schools -especially in Certified Military Uniformed Classes -the subject of military education is taught as well. Among students, however, the defence curriculum is taught mainly as part of extra-curricular activities, mainly within the Academic Legion and Passport Programme. On the basis of the research strengthening military potential is supported by the defence education of young people. The exploration underlined that achieving the defence objectives outlined by the programmes of the Ministry of National Defence in agreement with the Ministry of National Education. The study used the diagnostic survey research method and the techniques of content analysis, a questionnaire, interviews, and observations. The article conluds recommendations for security education curriculum.

Uncontrolled migration is one of the threats to the state, and as illegal immigration, it is a leading threat to international security. From the point of view of state security, illegal immigration is classifi ed as "requiring caution. " In the case of Poland, illegal immigration is to a considerable extent handled by organised crime of transnational reach, eff ectively taking the form of criminal enterprises. In the present day, diff erentiating between migration and exile is intricate, because the reasons behind migration are unclear and depend on numerous factors, also related to migration policies in target countries. However, for criminal enterprises, which stop at nothing to maximise their business profi ts, both refugees seeking refuge and migrants seeking to improve their socio-economic situation are a source of substantial fi nancial gain. Criminal organisations generate profi t by committing various crimes. Th is article also looks at international and national institutions combating illegal migration as a threat to the security of the Republic of Poland and Europe.1 Article was based on the scientifi c co-operation between authors during preparation of their master thesis, Piertuniak M., Master Th esis: Impact of Illegal Immigration on State Security of the Republic of Poland (Wpływ nielegalnej migracji na bezpieczeństwo Rzczypospolitej Polskiej),

Uncontrolled migration is one of the internal threats to the state that also manifests itself as a civilization problem. It illustrates the growing lack of social acceptance for this phenomenon. It is the result of not only geopolitical changes, but also the sequence of social dependencies. According to data from the census, over 99.8% are citizens of the Republic of Poland, and persons without citizenship amount to 57 thousand. It should be emphasized that in recent years more and more foreigners have come to Poland in search of a better life. Despite the influx of immigrants, Poland is a country with a negative balance, which proves that more people from Poland emigrate than to come to it. Accurate estimation of the scale of the phenomenon is not easy due to the adoption of the illegal dimension and that the Central Statistical Office and the Office for Foreigners otherwise collect and present information on foreigners. There are lot of intercultural differences connected with religion, tradition, customs and social behaviour. Often the barrier between the world of immigrants and the local society is so great that it creates conflicts in the places where immigrants reside, including anti-refugee protests, inclusive.