Tidligere arrangementer - Side 56

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).

Miguel Zumalacarregui, Max Planck Institute for Gravitational Physics, Germany.

Avdeling for allmennmedisin ved UiO inviterer til fagseminar i forbindelse med at professor J?rund Straand runder 70. 

Strategiutvikling og bruk av fremtidsscenarier: Om forholdet mellom styring og ledelse n?r beslutningstempoet ?ker og kravene til nytenking er stort. Hvordan jobbe med strategi n?r verden hele tiden endrer seg?

By Simen Sandve from the Norwegian University of Life Sciences (NMBU)

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).

Tob¨ªas Felipe, Instituto de Astrofisica de Canarias (Spain).

In this talk Fanny Chabrol will present an exploratory research she conducted in Niamey in 2018-2019.

NCMM Associate Investigator, Jacob Odeberg (MD and Professor Institute for Clinical Medicine, University of Troms? and University Hospital of North Norway) will give the talk: 'Plasma proteomics in COVID-19' as part of NCMM's Tuesday Seminar series.

150 ?r etter Frederik Holsts d?d. 

Michele Fumagalli, Physics Department, University of Milano Bicocca.

By Michael Knapp from University of Otago, New zealand. Please be aware of the change in time.

C*-algebra seminar talk by Magnus Goffeng

NCMM Associate Investigators, Tero Aittokallio (Professor Institute for Cancer Research Oslo University Hospital and Oslo Centre for Biostatistics and Epidemiology UiO) and Victor Greiff (Ass. Professor Institute of Clinical Medicine, UiO), will present their research as part of NCMM's Tuesday Seminar series

By Eline Lorenzen from University of Copenhagen, Denmark.

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).

C*-algebra seminar talk by Ulrich Pennig

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).