Sandwich composites are widely used in aerospace materials thanks to their low weight and high strength properties. The purpose of this study is to observe the effects of polyurethane foam filling on honeycomb core structures produced by additive manufacturing in terms of mechanical strength and moisture absorption properties. Within the scope of the study, honeycomb structures were produced by a 3D printer using polylactic acid (PLA) filament. Then, the honeycomb core was filled with polyurethane foam, which is supplied in liquid form. After the core material was given its final form, it was combined with an epoxy and carbon fibre facesheet material using the vacuum infusion technique. After the sandwich composite production was completed, in-plane compression, three-point bending, shear, and moisture absorption tests were applied. The polyurethane foam filling greatly increased the mechanical strength, but slightly more moisture absorption occurred in this structure compared to a hollow honeycomb structure.

Airports are very important facilities for global transportation. Energy plays a key role for the comfort needs of passengers and the safe operation of aircraft. In airports with high energy consumption areas, energy management allows the reduction of both costs and environmental impacts. Therefore, the phenomena that affect energy consumption in airports need to be identified. In this study, the factors affecting energy consumption in airport terminal buildings were determined by regression analysis and mathematically modeling. In addition, energy-induced Global Warming Potential (GWP) was determined and its change was explained mathematically. It was seen that with each change in passenger causes a 1.59 kWh energy and 1.44 kg CO_{2 eq}. change. However, each increase in the number of degree days causes a 3468.6kWh energy and 1428 kg CO_2eq. increase.

It is defined as the time when a work or formation passings, past, or will pass in an action. Time management is one of the issues of that are difficult to manage in the aviation operation managent process. When the aircraft is in place, time management is one of the important elements to make operational processes effective and efficient. Planned time-out in the ground operation process cause delays. Some of the deviations in the process are prevented by the management of staff. The source of precautions is usually internal factor. However, perceptions that some external factors, such as weather, are effective can not be managed by staff. If the aircraft can not depart at the time of departure, the reasons for the delay are classified based on the IATA Standard delay codes. The IATA delay codes were taken as reference during the survey. A questionnaire consisting of IATA delay codes was applied to the employees working in the aviation sector in Turkey. When the results of the questionnaire and findings were analyzed by Chi-square analysis and Binomial test method using SPSS program and reliability of the data was determined by KMO & Bartlett test. Based on the current study, time planning is important in aviation operations. An analysis of external factors that cannot be controlled, such as the internal factors that can be corrected for the problems caused by the system-induced or human factor for the correct operation of the planned time, and the constraints imposed on the environmental conditions or the operation of the system must be well analyzed.

Nowadays, Industry 4.0 applications have brought unprecedented technological innovations in the transportation logistics value chain. The reflection of these developments in academia and their use in universities is very significant for education. The air transport sector is one of the leading sectors in the use of new technologies. Better results can be obtained by supporting theoretical air transportation education with visual elements and simulations in aviation management education. Students of aviation management departments receive theoretical training. In aviation management departments, students are getting trainings to work different departments of aviation companies. These departments can be supported by hands-on courses such as simulations or laboratories that show how to use information in real life. Within the scope of the research, a trial version of 19 different airport management simulations that can be used for airport management in aviation management departments. It has been evaluated in which simulation the theoretical knowledge of the research airport management course can best be put into practice and contribute to professional development. It is shown which simulations of different scenarios involve airport management strategies.

The aviation industry, which is the newest of the types of transportation, has had to deal with structural problems as it develops and grows. These problems tried to be solved with international, regional, and national aviation authorities by rule makers. One of the problems of the aviation industry is qualified human resources. Air transportation cannot be carried out without air and ground personnel in today's conditions. The execution of efficient and safe flight operations depends on the competence, abilities and training of its personnel. Special trainings are required to work in the aviation industry. These trainings are determined and regulated by aviation authorities. Airlines, higher education institutions, aviation schools, etc. are conducts trainings to meet the needs of qualified personnel. However, most of the higher education institutions do not prepare their curricula according to the regulations of the authorities. In this research, aviation authorities and personnel licensing, higher education institutions and authorization topics were examined; The requirements for authorization of the Faculty of Aeronautics and Astronautics of Eskisehir Technical University under SHY-UHU and SHT-EGITIM/HAD have been established and compared with the current situation; and suggestions to Eskisehir Technical University on authorization were made.