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Tidligere arrangementer - Side 39

Tid og sted: , Niels Henrik Abels hus, 9th floor

This seminar will consist of two separate presentations, each about 15-minute long.

1) Magnetic Quincke Rollers with tunable single particle dynamics and collective states
2) Electrically controllable ferrofluids

Tid og sted: , Seminar room 3508 Bonnevie, Kristine Bonnevies hus

Unfortunately, the seminar by Olli Hyv?rinen, AQUA, IBV, is cancelled.

Tid og sted: , Niels Henrik Abels hus, 9th floor
It is well known that if the singular values of a matrix are distinct, then its best rank-n approximation in the Frobenius norm is uniquely determined and given by the truncated singular value decomposition. On the other hand, this uniqueness is in general not true for best rank-n approximations in the spectral norm. In this talk we relate the problem of finding best rank-n approximations in the spectral norm to Kolmogorov n-widths and corresponding optimal spaces. By providing new criteria for optimality of subspaces with respect to the n-width, we describe a large family of best rank-n approximations to a given matrix. This results in a variety of solutions to the best low-rank approximation problem and provides alternatives to the truncated singular value decomposition. This variety can be exploited to obtain best low-rank approximations with problem-oriented properties.
We further discuss the generalization of these results to compact operators in L2, and explain how they can be used to both describe the out-performance of smooth spline approximations of solutions to differential equations when compared to classical finite element methods, and to solve the outlier-problem in isogeometric analysis.
This talk is based on work done in collaboration with Michael Floater, Carla Manni and Hendrik Speleers.
Tid og sted: , Room 1249 at Eilert Sundts Hus

Department seminar. Anders Humlum is an Assistant Professor of Economics at the Booth School of Business, University of Chicago. He will present the paper: "Changing Tracks: Does Reskilling Help Disabled Workers Back to Work?" (written with Jakob R. Munch and Pernille Plato).

Tid og sted: , Room 1119, Niels Henrik Abels hus

The Section 4 seminar for the Spring of 2023 will be held on Wednesdays at 10:15–12:00 (see the schedule)

Tid og sted: , NHA107

C*-algebra seminar talk by John Quigg (Arizona State University)

Tid og sted: , Niels Henrik Abels hus, 9th floor

I will discuss some of our recent results on active chiral and nematic membranes. The chiral stresses we consider give rise to a novel form of odd elasticity. To outline this phenomenology I will give explicit calculations outlining spontaneous flow transitions and shape instabilities. I will discuss the relevance of these results in developmental biology and their relation to active nematics, in particular how certain limits of active nematic membranes can reduce to a theory of an isotropic membrane with an active stress defined by the deviatoric part of the shape operator.

Tid og sted: , Room 1249 at Eilert Sundts Hus

Department seminar. Kyle Herkenhoff is a Senior Economist at the Federal Reserve Bank of Minneapolis and an Associate Professor at the University of Minnesota. He will present the paper: "Intergenerational Mobility and Credit" (written with J. Carter Braxton, Nisha Chikhale, and Gordon Phillips).

Tid og sted: , Kristine Bonnevies Hus, Bikuben (Nucleus)

Welcome to seminar by Mikkel Elle Lepper?d (Researcher, Cinpla Group, FYSCELL, IBV).

Tid og sted: , Online webinar

Find out how CoMorMent's research on the links between mental and physical health can be translated into clinical practice at this webinar.

Tid og sted: , NHA107

C*-algebra seminar talk by Roberto Conti (Sapienza University of Rome)

Tid og sted: , Room 1249 at Eilert Sundts Hus

Department seminar. Fernando Stipanicic Márquez is
a Postdoctoral Researcher at Haas School of Business, University of California at Berkeley. He will present the paper: "The Creation and Diffusion of Knowledge: Evidence from the Jet Age" (written with Stefan Pauly).

Tid og sted: , Seminar room Kristine Bonnevie 3508, Kristine Bonnevies hus

By Sara Goodacre from the University of Nottingham, UK

Tid og sted: , PAM2

In this talk, Linn Iren Sj?nes R?dvand presents data from the underdescribed Austronesian language Patani.

Tid og sted: , Peisestua (room 304), Svein Rosselands Hus / Zoom

Luca Amendola, Institut für Theoretische Physik, Heidelberg University.

Tid og sted: , NHA B1120

Many have tried to adapt Clemens and Griffiths's approach to irrationality of cubic threefolds to higher dimensions, using different invariants in place of H^3(X,Z): the transcendental part of H^4, derived categories, quantum cohomology... I will report on my attempt to use higher algebraic K-theory, which turns out to be strictly weaker than what Voisin and Colliot-Thélène have already gotten from Bloch-Ogus theory, but (I think) in an interesting way. For a positive result, I can show that the higher K-theory of Kuznetsov's K3 category for a cubic or Gushel-Mukai 4-fold looks the same as that of an honest K3 surface.

Tid og sted: , Rikshospitalet, A3, 3067

Unlocking New Horizons in Transgenic Mouse Model Generation: Join us for our workshop and discover the latest techniques in transgenic mouse model generation.

Tid:

This is a half-day online workshop on PDEs in physical systems. Abstracts and Zoom link can be found here!

Tid og sted: , Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor

This talk will focus on recent work about the sequential detection of anomalies within partially observed functional data, motivated by a problem encountered by an industrial collaborator. Classical sequential changepoint detection approaches look for changes in the parameters, or structure, of a data sequence and are not equipped to handle the complex non-stationarity and dependency structure of functional data. Conversely, existing functional data approaches require the full observation of the curve before anomaly detection can take place. We propose a new method, FAST, that performs sequential detection of anomalies in partially observed functional data. This talk will introduce the approach, and some associated theoretical results, and highlight its application on telecommunications data.

This is joint work with Idris Eckley and Lawrence Bardwell.

Tid og sted: , Kristine Bonnevies Hus, Proteome (3627)

Welcome to seminar by Omer Faruk Kuzu (Researcher, Saatcioglu Group, BMB, IBV).

Tid og sted: , Room 929 Eilert Sundts House, and Zoom

The Ports speaker series features Christiaan De Beukelaer, Senior Lecturer in Cultural Policy University of Melbourne

Tid og sted: , Seminarrom 219, Georg Morgenstiernes hus

Martin Refseth is a PhD candidate at the Centre for Technology, Innovation and Culture (TIK). This seminar marks his midway evaluation.

Tid og sted: , Niels Henrik Abels hus, 9th floor

The human brain has no lymphatic vessels, so how does the brain clear metabolic waste? In 2012, Iliff et al. proposed a theory about waste clearance of the brain, called the "glymphatic" theory. The theory suggest that the waste clearances is bio-mechanical, and that impaired clearance may be the cause of some neurodegenerative diseases and disorders. The inaccessibility of the human brain have been a hurdle in the research, as experiments on rat brains do not translate to the human brain. Researchers at Oslo university hospital Rikshospitalet have shown clearance using tracers visible in magnetic resonance images (MRI). However, the MRI only provide snapshots of different states in time, therefore computational modeling is needed to fill in the gaps. In this presentation, we will look at computational modeling with the MRI to infer material parameters in the brain.