Tidlegare arrangement - Side 83
"Method Development for Detection of Underivatized Oxysterols in Cell Medium"
Tittel: Heaving motion of a floating body - a computational approach
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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.
"Utprøving og videreutvikling av undervisningsopplegg for identifisering av mikroplast i jord"
This Stochastic Analysis and Applications Workshop aims to provide a professional platform for young researchers in stochastics from China and Norway to convene, exchange ideas, and potentially establish new collaborations.
Analytic description for synchronization of two-level quantum systems
Tittel: Tropical polypols
The Section 4 seminar for the Spring of 2023 will be held on Wednesdays at 10:15–12:00 (see the schedule)
C*-algebra seminar talk by John Quigg (Arizona State University)
"Structural and Chemical Characterization of ZnGexSn1−xN2 for Solar Cell Applications"
"Utvikling og utprøving av et undervisningsopplegg i kjemi 2 - En undersøkelse av elevers anvendelse av redoksreaksjoner og grønn kjemi knyttet til forsøket «syntese og farging med indigo»"
Transport in the one-dimensional spin-S XXZ model
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Masterkreeringen er en seremoni der vi feirer våre uteksaminerte kandidater.
"Konseptuell forståelse hos generell kjemi studenter - Har kjemi- og mattefag fra videregående noe å si?"
Dorthea Gjestvang will defend her thesis “Excitation energy propagation and angular momentum generation in the nuclear fission process” for the degree of Philosophiae Doctor at the University of Oslo, Faculty of Mathematics and Natural Sciences.
Tittel: Impact of macrophages in the spread of HIV
Analysis of the Functional Role of Directed Simplicial Structures in Biological Neural Networks
Tittel: Optimizing Coordination on Road Construction Sites with a Reinforcement Learning Framework
Doctoral candidate Peyman Rasouli at the Department of Informatics, Faculty of Mathematics and Natural Sciences, is defending the thesis Local Explainability of Tabular Machine Learning Models and its Impact on Model Reliability for the degree of Philosophiae Doctor.
Doctoral candidate Vinit Ravishankar at the Department of Informatics, Faculty of Mathematics and Natural Sciences, is defending the thesis Understanding Multilingual Language Models: Training, Representation and Architecture for the degree of Philosophiae Doctor.
"Utvikling av undervisningsopplegg; Overvåkning av estersyntese ved bruk av Vernier mini gasskromatograf"
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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.
Tittel: Spectrahedra and their boundaries
"Emissions of volatile organic compounds from a closed landfill - An investigation of emitted compounds and comparison of measurement and sampling strategies"
"Utvikling av et undervisningsopplegg med Vernier mini GC Plus i organisk syntese"