Applying OLAP Pre-Aggregation Techniques to ... - Jacobs University

Acknowledgments
I would like to express my sincere gratitude to my thesis advisor, Prof. Dr. Peter
Baumann for his excellent guidance throughout the course of this dissertation. With
his tremendous passion for science and his great efforts to explain things clearly and
simply, he made this research to be one of the richest experiences of my life. He
always suggested new ideas, and guided my research through many pitfalls. Furthermore,
I learned from him to be kind and cooperative. Thank you, for every
single meeting, for every single discussion that you always managed to be thoughtprovoking,
for your continue encouragement, for believing in that I could bring this
project to success.
I am also grateful to Prof. Dr. Inés Fernando Vega López for his valuable suggestions.
He not only provided me with technical advice but also gave me some important
hints on scientific writing that I applied on this dissertation. My sincere gratitude also
to Prof. Dr. Vikram Unnithan. Despite being one of Jacobs University’s most popular
and busiest professors due to his genuine engagement with student life beyond
academics, Prof. Unnithan took interest in this work and provided me unconditional
support.
I would like to thank two promising graduate students, Irina Calciu and Eugen
Sorbalo for their outstanding contributions with some of the experiments presented in
Chapter 5 of this thesis.
I am especially grateful to my colleagues Michael Owonibi, Salah Al Jubeh, and
Yu Jinsongdi for their many valuable discussions, and for providing a stimulating and
fun environment in which to learn and grow.
I am grateful to the team assistants at School of Engineering and Science, for helping
the School to run smoothly and for assisting me in many different ways. Sigrid
Manss deserves special mention. Thank you for all your kindness, and caring.
Also, I would like to thank Connie Garcia, Jim Toersten, Greg White, Irina Prjadeha,
and all of my friends that helped me to proofread this thesis. Victoria Inness-
Brown deserves special mention for applying her expertise as an editor on reviewing
each chapter of this thesis.
Thank you to all my great friends who provided support and encouragement in so
many ways, for helping me to see the bright side of my problems in difficult times, for