Events

Upcoming

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Time and place: Aug. 20, 2021 11:00 AM12:00 PM, Online
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Time and place: Sep. 17, 2021 11:00 AM12:00 PM, Online
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Time and place: Oct. 1, 2021 11:00 AM12:00 PM, Online
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Time and place: Nov. 25, 2021 8:00 AMNov. 26, 2021 3:00 PM, University of Oslo

For the third year in a row, STORM and TMS organize another workshop on rough path theory and related topics. This years workshop is called "Rough Path Techniques in Stochastic Analysis and Mathematical Probability"  and will be held 25.26.- November 2021. We plan to hold the workshop in-person at the University of Oslo.

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Time and place: Dec. 6, 2021Dec. 10, 2021, Blindern campus

Winter school at University of Oslo

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Time and place: June 25, 2021 12:15 PM1:00 PM, Zoom

Abstract: Efficient and parameter robust solvers for multiscale/multiphysics systems, where the coupling is enforced by the Lagrange multipliers, rely on operators in fractional Sobolev spaces defined over the interface. Arguably, this feature is not unexpected as there is explicit coupling/an interfacial variable in the system. However, in this talk we show that even for coupled problems free of Lagrange multipliers the fractional operators are a crucial component for constructing robust preconditioners. Stokes-Darcy/Biot systems will be discussed.

This talk is part of the Mechanics Lunch Seminar series. That means 20min talks plus discussion in an informal setting.

Zoom: To obtain the Zoom meeting details please contact Timo Koch (timokoch at math.uio.no).

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Time and place: June 23, 2021 1:15 PM, Zoom

Doctoral candidate Ada Johanne Ellingsrud at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, is defending the thesis Computational modelling of electrodiffusion and osmosis in cerebral tissue for the degree of Philosophiae Doctor.

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Time and place: June 18, 2021 1:15 PM, Zoom

Doctoral candidate Silvia Lavagnini  at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, is  defending the thesis Stochastic Modelling in Energy Markets - From the Spot Price to Derivative Contracts for the degree of Philosophiae Doctor.

Time and place: June 18, 2021 12:15 PM1:00 PM, Zoom

Abstract: New estimates of heat loss from Earth's interior (the mantle) suggest that the Pacific side of the planet has been losing heat at a much higher rate compared to the African side. The difference in heat loss amounts to almost 50 degrees more cooling of the Pacific side over the past 400 million years.

This talk is part of the Mechanics Lunch Seminar series. That means 20min talks plus discussion in an informal setting.

Zoom: To obtain the Zoom meeting details please contact Timo Koch (timokoch at math.uio.no).

Logo Trond Mohn Foundation and Tromsø Research Foundation.
Time: June 16, 2021 9:00 AMJune 18, 2021 1:00 PM

The aim of this workshop is to present some recent developments on the interplay between Dirichlet series and operator theory to researchers in Norway and abroad.

Time and place: June 11, 2021 12:15 PM1:00 PM, Zoom

Abstract: Magmatic intrusions into the earth's crust lead to geological formations such as sills, laccholites and volcanoes. The conventional approach is to threat the intrusive fluid as Newtonian and viscous, while the host-rock is assumed to behave purely elastic. However, Magma is known to have non-Newtonian properties. In addition, field studies indicate that visco-elastic deformation of the host rock is an important effect in the propagating fracturing. We thus want to investigate the effect of introducing a yield-stress fluid in the intrusion process. We perform an experiment based on the elasto-hydro-dynamical approach, but where we change the injected fluid from a viscous (glycerol) to a yield-stress fluid (carbopol). We are interested in seeing how this potentially can change the dynamics of the intrusion compared with the viscous case. 

This talk is part of the Mechanics Lunch Seminar series. That means 20min talks plus discussion in an informal setting.

Zoom: To obtain the Zoom meeting details please contact Timo Koch (timokoch at math.uio.no).

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Time and place: June 11, 2021 11:00 AM12:00 PM, Online
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Time and place: June 9, 2021 1:15 PM, Zoom

Doctoral candidate Matthias Rauter at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, is  defending the thesis Multiphase Navier-Stokes Equations applied to landslide tsunamis: Numerical simulations of granular flows and their interaction with water bodies for the degree of Philosophiae Doctor.

Time and place: May 25, 2021 2:00 PM3:00 PM, Zoom

C*-algebra seminar talk by Magnus Goffeng

Time and place: May 21, 2021 12:15 PM1:00 PM, Zoom

Abstract: In computational mechanics, high fidelity simulations of a parameterized partial differential equation (PDE) are often computational expensive, which make them impractical for real-time predictions. Non-intrusive reduced order modelling aims to address this problem with a fast low rank approximation. This is usually done in two phases: the model is built in the offline phase and the prediction is done in the online phase. In the offline phase, data points, or so-called snapshots, are collected from simulations or measurements. The reduced basis space can then be obtained from the dataset using Proper Orthogonal Decomposition. In the online phase, the solution for a new set of parameters is obtained by first recovering the expansion coefficients for the reduced basis and then projecting them back into the uncompressed real-life space. The non-intrusive approach relies on a statistical mapping between the coefficients and the parameters. Various methods have been proposed to do so, this seminar will discuss radial basis function interpolations and dynamic mode decompositions.

This talk is part of the Mechanics Lunch Seminar series. That means 20min talks plus discussion in an informal setting.

Zoom: To obtain the Zoom meeting details please contact Timo Koch (timokoch at math.uio.no).

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Time and place: May 21, 2021 11:00 AM12:00 PM, Online
an art picture of Maryam Mirzakhani, iranian mathematician
Time and place: May 12, 2021 12:00 PM4:30 PM, Zoom

May12 is a joyful opportunity for the mathematical community to celebrate women in mathematics. The celebration takes place every year, all around the world. Please join us!

Time and place: May 11, 2021 2:00 PM3:00 PM, Zoom

C*-algebra seminar talk by Ulrich Pennig

Time and place: May 7, 2021 12:15 PM1:00 PM, Zoom

Abstract: Graphics processing units, or GPUs, offer significantly increased performance for some scientific computing workloads. But in the case of finite element simulations on unstructured meshes, the benefits of using GPUs are still the subject of an ongoing discussion for which there is no clear conclusion. We describe our work on improving the GPU acceleration of a finite element solver framework called FEniCS, where code is automatically generated for the user from a high-level description of their finite element problem. We use automated code generation to offload the assembly of linear systems to a GPU, while taking care that data transfers between CPU and GPU do not become a performance bottleneck. We provide examples to show that GPUs and automated code generation can be used to accelerate finite element solvers. Even though more work is needed to find efficient GPU-based linear solvers, our improvements to FEniCS can be used as a starting point for exploring the potential of GPU acceleration for finite element simulations.

This talk is part of the Mechanics Lunch Seminar series. That means 20min talks plus discussion in an informal setting.

Zoom: To obtain the Zoom meeting details please contact Timo Koch (timokoch at math.uio.no).

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Time: May 7, 2021 11:00 AM12:00 PM
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Time: Apr. 30, 2021 11:00 AM12:00 PM
Time and place: Apr. 27, 2021 9:00 PM10:00 PM, Zoom

C*-algebra seminar talk by Rufus Willett

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Time and place: Apr. 20, 2021 1:15 PM, Zoom

Doctoral candidate Reyna Guadalupe Ramirez de la Torre at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, is  defending the thesis Experiments on Bubble and Droplet Production in Falling Jets and Breaking Waves for the degree of Philosophiae Doctor.

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Time: Apr. 16, 2021 11:00 AM12:00 PM
Time and place: Apr. 9, 2021 12:15 PM1:00 PM, Zoom

Abstract:Due to their large mass and small aspect ratio, icebergs pose a threat to boats and offshore structures. Small icebergs and bergy bits can cause harm to platform hulls and are more difficult to discover remotely. When there is a risk of collision between icebergs and platforms, it is necessary to deflect its drifting course to ensure safe human operations in polar offshore regions. In this talk, I will present iceberg towing experiments carried out on Svalbard in September 2020...

This talk is part of the Mechanics Lunch Seminar series. That means 20min talks plus discussion in an informal setting.

Zoom: To obtain the Zoom meeting details please contact Timo Koch (timokoch at math.uio.no).