Previous events - Page 133

Heïdi Sevestre at the Department of Geosciences will be defending her dissertation: Surge-type glaciers: controls, processes, distribution

Doctoral candidate Heïdi Sevestre at the Department of Geosciences will give a trial lecture on the given topic: Ice sheets, glaciers and sea-level rise

Ingrid Hobæk Haff is giving her inaugural lecture with the title: Parameter estimation for pair-copula constructions.

Sven Wedemeyer, Researcher - Institute of Theoretical Astrophysics

Upcoming short presentation from MSc/PhD students in meteorology and oceanography:

Speaker: Helen Yeung

Title: Analysis of ENSO signal in the stratosphere in WACCM simulations

Supervisor: Frode Stordal

Mathematical Institute, University of Oxford

Rafael Rodríguez Ochoa at the Department of Geosciences will be defending his dissertation: Risk Analysis of Earthquake-Induced Submarine Landslides in Deepwater Sites

Doctoral candidate Rafael Rodríguez Ochoa at the Department of Geosciences will give a trial lecture on the given topic: Mechanisms of pore pressure generation in marine sediments and its implications for offshore geohazards

Steven Mueller at the Department of Geosciences will be defending his dissertation: Stratigraphy and Depositional Environments of the Boreal and Tethyan Early Carnian (Triassic) – Evidenced by Palynology and Geochemistry

Geir Ellingsrud, Professor, Mathematics Department, UiO 

Doctoral candidate Steven Mueller at the Department of Geosciences will give a trial lecture on the given topic: The Toarcian Oceanic Anoxic Event  - causes and implications

Martin Gulbrandsen, UiS, gives the Seminar in Algebra and Algebraic Geometry

The dual cell complex of Hilbert scheme degenerations  

Upcoming short presentation from MSc/PhD students in meteorology and oceanography:

Speaker: Hui Tang

Title: Dynamical vegetation model in NorESM

Judith Packer, University of Colorado (Boulder), USA, will give a talk with title: Wavelets associated to representations of higher-rank graph C*-algebras

Abstract: Let $\Lambda$ denote a finite $k$-graph in the sense of A. Kumjian and D. Pask that is strongly connected, and let $\Lambda^{\infty}$ denote its infinite path space. I discuss some recent joint work with C. Farsi, E. Gillaspy, and S. Kang, where we construct a system of functions that we call ``wavelets" on a Hilbert space of square-integrable functions on $\Lambda^{\infty}.$ In so doing, we generalize work of M. Marcolli and A. Paolucci for finite directed graphs to the higher rank case. The key tool is the construction of a representation of the graph $C^*$-algebra $C^{\ast}(\Lambda)$ on $L^2(\Lambda^{\infty},M)$ for the appropriate measure $M.$ When the finite $k$-graph $\Lambda$ in question is strongly connected and aperiodic, the representation of $C^{\ast}(\Lambda)$ that we obtain is faithful.

Fabian Krüger (Heidelberg Institute for Theoretical Studies) will give a 30 min seminar in the lunch area, 8th floor N.H. Abel's House at 14:45 September 29th.

Monica Musio (University of Cagliari) will give a 30 min seminar in the lunch area, 8th floor N.H. Abel's House at 14:15 September 29th.

Upcoming short presentation from MSc/PhD students in meteorology and oceanography:

Speaker: Christine Smith-Johnsen

Title: Energetic particle precipitation

Supervisor: Yvan Orsolini and Frode Stordal

Shinji Mukohyama, Yukawa Institute for Theoretical Physics, Kyoto University

Antoine Julien, NTNU, will give a talk with title: Links between cut-and-project tilings and Diophantine approximation

Abstract: Cut-and-project tilings are obtained by cutting a slice of a higher dimensional lattice and projecting it on a lower dimensional space. The result is a point set which is regular enough (since it originates from a lattice), but is not periodic, provided the direction of the slice is irrational in a suitable sense. In one dimension, typical examples of this construction are Sturmian subshifts. It is known that some of their dynamical properties depend on the arithmetic properties of a certain parameter. In this talk, I will recall some known results by Hedlund and Morse on Sturmian subshifts. Then, I will describe how, even in higher dimensions, the repetition properties of some cut-and-project sets can be linked to problems of simultaneous Diophantine approximation. This is joint work with A. Haynes, H. Koivusalo and J. Walton. 

Dr. Terry Onsager, National Oceanic and Atmospheric Administration, USA/Space Weather Prediction Center, USA.

Kristian Ranestad, UiO, gives the Seminar in Algebra and Algebraic Geometry

EPW cubes

Luc Van Der Voort, Professor, ITA

Felipe Rincon, UiO, gives the Seminar in Algebra and Algebraic Geometry

Positroids and the totally nonnegative Grassmannian