Gjesteforelesninger og seminarer - Side 17

Carlo Mannino (SINTEF and Department of Mathematics, University of Oslo) will give a talk on February 26th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Beamforming has long been a topic for physicists and signal processing researchers. By this talk, Tobas Dahl aims to open up the principles of beamforming for researchers with backgrounds from multiple quantitative disciplines; partial differential equations, statistics, machine learning and data analysis, chemometrics, psychometrics, cybernetics and others who feel they could understand the basics without taking on a (new) master's degree in physics or digital signal processing.

Camila Fabre Sehnem (Florianopolis), Brasil, will give a talk with title :

On $C^*$-algebras associated to product systems

Eleni Rosalina Andrinopoulou (Department of Epidemiology, Erasmus University Medical Center of Rotterdam, NED) will give a talk on February 12th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

In this talk, I will discuss how moduli spaces of Morse flow trees in Legendrian contact homology (LCH) can be oriented in a coherent and computable manner, obtaining a Morse-theoretic way to compute LCH with integer coefficients. This is built on the machinery of capping disks, and I will briefly explain how different systems of capping disks affect the orientations. This, in turn, uses the fact that an exact Lagrangian cobordism with cylindrical Legendrian ends induces a morphism between the LCH-complexes of the ends, which can be proven to hold also with integer coefficients.  

Vera Djordjilovic (Department of Biostatistics, University of Oslo) will give a talk on January 29th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Professor O.I. Klesov from National Technical University of Ukraine "Igor Sikorsky Kyiv Politechnic Institute" will give a mini-course on the following topic:

We discuss the notion of regularly varying functions  and some applications in probability theory. Some of the topics to be discussed are in order. Note however that not all topics will be discussed in full detail. The final choice of topics will depend on the time available.

Hans Rudolf Künsch (Department of Mathematics, Swiss Federal Institute of Technology of Zurich, SUI) will give a talk on January 18th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Li-Chun Zhang (Department of Social Statistics and Demographics, University of Southampton --- Department of Mathematics, University of Oslo) will give a talk on January 15th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

With the beginning of the new year, we kick-off with an informal workshop with three presentations.

Title: Microscale wave breaking and airflow separation in stratified two-phase pipe flow

by: Petter Vollestad, matematisk institutt, UiO.

Abstract: We perform an experimental study of stratified gas-liquid pipe flow with the aim to detect small-scale wave breaking and its influence on both the gas and liquid phase. Particle image velocimetry (PIV) is applied simultaneously in the two phases, and a criterion based on the vorticity in the crest region is used to detect microscale breaking waves. Airflow separation is frequently observed, and the study aims to investigate the correlation between small scale wave breaking and airflow separation above waves.  Results indicate that at moderate gas flow rates, microscale wave breaking has a stabilizing effect on the airflow above waves, reducing the sheltered region in the lee of the wave crest and the turbulence directly above the waves. At higher gas flow rates, no influence of wave breaking on the airflow is observed.