Bojan Zimonjić

In modern aerospace engineering, increasing demands for higher energy efficiency, elevated operating temperatures, and extended system service life impose significant limitations on conventional materials and protective coatings. In this context, nanotechnology has emerged as a key approach for enhancing the performance and reliability of aerospace systems by enabling precise control of material structure and functional properties at the nanoscale. This paper analyzes the role of nanotechnology in improving aerospace structures and propulsion systems, with a particular focus on nanostructured thermal barrier coatings and nanoscale surface engineering of structural alloys. The study is based on a systematic review and critical analysis of relevant scientific literature, combined with a comparative interpretation of experimental data reported in international journals. The comparison criteria include maximum operating temperature, effective thermal conductivity, fatigue resistance, and long-term service life of components. Special attention is given to the comparison between nanostructured solutions and conventional systems, including standard 6-8 wt.% yttria-stabilized zirconia thermal barrier coatings and traditional surface protection methods. The results indicate that nanotechnology-enabled solutions provide significant improvements in thermal efficiency and reliability of aerospace systems, primarily through reduced effective thermal conductivity and enhanced resistance to degradation processes, without a proportional increase in system mass or complexity. The paper also identifies current limitations of existing solutions and outlines future research directions toward the development of next-generation aerospace systems.

The security of civil aviation represents one of the most important aspects of modern global transportation. The increasing number of flights, the development of digital infrastructure, and the growing cyber threats create the need for new approaches to protecting passengers, personnel, and aviation systems. In this context, information technology (IT) plays a crucial role in improving all aspects of security - from physical and operational to communication and cybersecurity. This paper aims to analyze the significance and application of information technologies within the civil aviation security system, with a special focus on the implementation at Belgrade Nikola Tesla Airport. Through methods of analysis, comparison, and case study, the research examines how modern IT systems contribute to incident prevention, faster communication, process automation, and the reduction of human error risks. The results show that the integration of information technologies significantly increases the efficiency and reliability of security systems, while at the same time requiring continuous technological advancement and staff training. It is concluded that information technologies are not merely a technical tool but a strategic resource that ensures the sustainable development and safety of modern civil aviation.

Human resource management in aviation represents a key factor in maintaining efficiency, safety, and service quality in this specialized industry. The aviation sector, with its complex structure and high demands for precision and responsibility, requires a strategic approach to HR management, which includes selection, training, motivation, development, and management of employee stress and performance. Employees, including air traffic controllers, pilots, and technical staff, face high levels of stress and responsibility on a daily basis, which necessitates an optimal organizational climate and appropriate leadership style. Transformational leadership, open communication, and management support have proven crucial for maintaining high motivation, engagement, and work efficiency. The results of research conducted among air traffic controllers in Serbia, Montenegro, Bosnia and Herzegovina, and North Macedonia indicate the predominance of transformational leadership and a positive impact of organizational climate on employee performance and satisfaction. This study provides practical implications, highlighting the importance of strategic HR management, leadership development, and employee support in high-stress industries.

Over the past decades, air transport has achieved the most dynamic growth among all modes of transportation. This exponential development has created the need to regulate certain issues related to the observance of the principle of sovereignty, the protection and safety of passengers, and the right of ownership over aircraft through the adoption of international instruments. Air transport is inherently international in character, and therefore, coordination between countries must be ensured through the existence of international conventions and treaties. In this respect, the Geneva Convention of 1948, the Hague Protocol of 1955, and the Paris Agreement of 1956 represent three of the most important international instruments that laid the foundations for the international regulation of relations among member states of the international community. The main objective of this paper is to analyze the historical context and reasons for the adoption of these international instruments, as well as to examine their content and significance for aviation law. The conclusion reached is that each of these instruments is specific and, in its own way, contributes to maintaining stability and safety in air transport through the cooperative efforts of states.