I am grateful to Prof.Dr. Jan Mendling for accepting my visit and training at the Humbold University of Berlin, Institute of Informatics.

Humboldt University of Berlin (Humboldt-Universität zu Berlin, abbreviated HU Berlin) was established by Frederick William III on the initiative of Wilhelm von Humboldt, Johann Gottlieb Fichte and Friedrich Ernst Daniel Schleiermacher as the University of Berlin (Universität zu Berlin) in 1809, and opened in 1810, making it the oldest of Berlin’s four universities.
It was regarded as the world’s preeminent university for the natural sciences during the 19th and early 20th century, as the university is linked to major breakthroughs in physics and other sciences by its professors, such as Albert Einstein. Past and present faculty and notable alumni include 57 Nobel Prize laureates, as well as eminent philosophers, sociologists, artists, lawyers, politicians, mathematicians, scientists, and heads of state; among them are Albert Einstein, Karl Marx, Friedrich Engels, Otto von Bismarck, W. E. B. Du Bois, Angela Davis, Arthur Schopenhauer, Georg Wilhelm Friedrich Hegel, Walter Benjamin, Max Weber, Georg Simmel, Karl Liebknecht, Ernst Cassirer, Heinrich Heine, Max Planck and the Brothers Grimm.