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This Week’s Discoveries | 28 November 2017

dinsdag 28 november 2017
Niels Bohrweg 2
2333 CA Leiden
De Sitterzaal

First Lecture

Data sets on networks: some probabilistic tools. 

Luca Avena (MI)

Luca is an assistant professor within the Probability Theory group at the Mathematical Institute of Leiden University. His research interests focus on a number of topics at the interface between probability theory and statistical physics. Main themes in which he has been given contributions include: Markov processes and random walks, disordered systems, processes in random environments, networks analysis through randomized algorithms. 

Inspired by combinatorial problems from statistical physics, a couple of years ago, with Alexandre Gaudilliere (Marseille) we characterized properties of certain random spanning forests on arbitrary weighted finite graphs. These objects are related to fundamental algebraic and probabilistic structures of a given weighted graph (or of the associated adjacency matrix). 
These studies branched into questions of different nature and led to a number of applications within the analysis of real-world networks. The core of this talk is on three main such applications obtained recently with Gaudilliere, Fabienne Castell and Clothilde Melot (Marseille): 1) a procedure for downsampling well-distributed nodes/vertices 2) coarse-graining or reduction schemes for graphs and processes 3) Pyramidal wavelets-like algorithms to process signals on graphs.

Second Lecture

Fluisterende wind

Edwin van der Heide (LIACS)

Edwin van der Heide is both an artist and researcher in the field of sound, space and interaction. He extends musical composition and musical language into spatial, interactive and interdisciplinary directions. His work comprises installations, performances and environments. The audience is placed in the middle of his works and challenged to actively explore, interact and relate themselves to the work. He presented his work at renowned museums, festivals and music venues as well as conferences and symposia. Van der Heide runs his own studio and is part-time employed at Leiden University (LIACS / Media Technology MSc programme). He was Edgard Varèse guest professor at the Technische Universität Berlin (2009), won the Witteveen+Bos Art+Technology Award 2009 for his entire body of work. He was an invited artist and guest professor at Le Fresnoy, studio des arts contemporain in France for the year 2011-2012.

Invitation for the opening

On November 29th at 16h00 Edwin van der Heide’s public artwork Fluisterende wind (Whispering Wind) will open. The artwork consists of a wall relief of 12.5 by 2.5 meters and an 8-channel generative sound composition, and is part of Leiden University’s newly renovated P.J. Veth Building. The composition creates a continuum between noise and human voice that results in moments when wind appears to whisper. In this lecture Edwin van der Heide creates a context around his work as artist and researcher and demonstrates a part of the sound generation and processing behind Fluisterende Wind. 

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