Calendar of Physics Talks Vienna

Tribological aspects of ballroom dance with energy consumption analysis
Speaker:Dr. Aleksandar Marinkovic (Machine Design Department, University of Belgrade, Mechanical Engineering Faculty, Belgrade/Serbia)
Abstract:Tribology phenomena are obviously present and have significant importance in most of human activities, processes and actions. This research presents an attempt aimed to dealing with some basic concepts in study of tribology aspects in ballroom dancing. Analysing a couple of Standard and Latin ballroom dances, basic idea is to make approximate calculation of friction forces and torques and their influence on foot floor interface during the dance. Author take Viennese Waltz with also couple of other typical from standard and latin group of dances, where the concept and methodology of friction calculation has been performed. Besides the approximate calculation of friction, this paper attends to measure and analyse complete energy consumption during the dancing as a human activity. This could be done by making several experiments where total energy loss in ballroom dance used to be measured.
Date: Tue, 02.02.2016
Time: 16:00
Location:Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 B (room number DB05L03) 1040 Wien, Wiedner Hauptstraße 8-10
Contact:Ao.Univ.Prof.Dr. Peter Mohn

Non-reciprocal directional dichroism in the Room-Temperature Multiferroic BiFeO3
Speaker:Sándor Bordács (Budapest University of Technology and Economics)
Abstract:Multiferroics permit the magnetic control of the electric polarization and the electric control of the magnetization. These static magnetoelectric (ME) effects are of enormous interest: The ability to read and write a magnetic state current-free by an electric voltage would provide a huge technological advantage. Dynamic or optical ME effects are equally interesting, because they give rise to unidirectional light propagation as recently observed in low-temperature multiferroics. This phenomenon, if realized at room temperature, would allow the development of optical diodes which transmit unpolarized light in one, but not in the opposite, direction. Here, we report strong unidirectional transmission in the room-temperature multiferroic BiFeO3 over the gigahertz-terahertz frequency range. https://www.ifp.tuwien.ac.at/www.ifp.tuwien.ac.at/fileadmin/seminar/160203_Bordacs_abs.pdf
Date: Wed, 03.02.2016
Time: 16:00
Duration: 45 min
Location:Seminarraum DC rot 07 (= FH rot 07 = 138B), 7. OG, roter Bereich, Freihausgebäude, TU Wien, Wiedner Hauptstraße 8-10, 1040 Wien
Contact:Andrei Pimenov