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Acknowledgments

I would like to thank my supervisors, mr. Kostas Siozios and mr. Minas Dasygenis, for their guidance and support 

throughout the whole process of creating this thesis.

I also want to thank Dimitris Tsiktsiris, for his thoughtful advice and help.

The IT department of AUTH, and especially mr. Georgios Pallas, for their help in gathering and preparing the traffic 

from the university gateway, even though that part of the project failed to launch in the end.

Lastly, I would like to express my gratitude to my family and friends, for the years of constant support, help and 

encouragement that they generously provided me with throughout my undergraduate and postgraduate studies, 

and for their patience while I was ranting about things they didn’t understand.

This thesis was partially supported by the Hellenic Petroleum Company and the Special Account for Research Funds, 

through the Scholarship for Academic Excellence during the academic year 2020-2021

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