Topic of this thesis is concept design of high power towbarless aircraft tractor. Concept brings up different form design for overall appearance of vehicle based primarily on new technologies and solutions.

Tens of thousands of migrants headed for the Greece-EU border line immediately after the Turkish Government's decision that it would not prevent third-country nationals wishing to cross into Europe in early spring 2020. This study examines the primary motivations of immigrants and their experiences in encountering Turkish and Greek security forces during the period in question. This study also proceeds from the idea that the immigration institution is autonomous. A total of eleven immigrants were interviewed in nine interviews using in-depth and semi-structured interview techniques. In the light of the data provided by the interviewees, it is understood that they are in an environment of insecurity in all aspects of life in Turkey, that they do not have legal status, employment, income and job security, and that immigrants have become even more vulnerable with the recent economic crisis in the country. The mass migration movement towards Europe in 2015, which is still vividly in the memories of immigrants, positively affects their motivation as an example of a successful border crossing. The Turkish Government faces immigration autonomy as it tries to regulate immigration forward; however, a tacit alliance is formed between the two agents. An irreconcilable conflict is experienced between the immigrants and the Greek border guards. Greek troops employ a strategy designed to create violence and shock, and the immigrants adopt survival against this strategy as the primary method.

This thesis is focused on airport departure operations; its objective is to assign a value to surface surveillance information within a collaborative framework. The research develops a cooperative concept that improves the control of departure operations at busy airports and evaluates its merit using a classical and widely accepted airport departure model. The research then assumes departure operations are collaboratively controlled and develops a stochastic model of taxi operations on the airport surface. Finally, this study investigates the effect of feeding back different levels of surface surveillance information to the departure control process. More specifically, it examines the environmental and operational impact of aircraft surface location information on the taxi clearance process. Benefits are evaluated by measuring and comparing engine emissions for given runway utilization rates.

This master´s thesis is focused on now being developed electric taxi system, which is going to be used for aircraft´s ground movement. The content of this work includes description of this system, requirements and developed solutions, next part describes and evaluate the consequences of deployment such system in real traffic.