Previous events - Page 52
Odd Petter Sand will defend his thesis Integrating Computing with Mathematics and Science Education: Case Studies of Student Understanding and Teaching design for the degree of Philosophiae Doctor.
Doctoral candidate Ainar Drews at the Institute of Theoretical Astrophysics, Faculty of Mathematics and Natural Sciences, is defending the thesis "On microjets in sunspot penumbrae" for the degree of Philosophiae Doctor.
Abstract: My soft matter research group investigates the autonomous transformation of phospholipid agglomerates into membrane compartments through a sequence of topological changes on solid interfaces. This process is initiated by contact and wetting of artificially created as well as natural surfaces by the lipids, and proceeds via a network of interconnected lipid nanotubes to produce nearly uniform lipid bilayer compartments. Under minimal assumptions it is conceivable that such process could have occurred on the early Earth, where the autonomous formation of simple membrane compartments is presumed to have enabled encapsulation of nucleotides and prebiotic chemistry precursors. According to the currently accepted “bulk hypothesis”, such compartments have spontaneously formed under moderate environmental conditions from lipids suspended in bulk aqueous medium. Only very recently, surfaces have emerged as potential supporting structures for the self-assembly of prebiotic compartments. In my talk, I will report on new evidence for the involvement of surfaces in protocell nucleation and development. The talk will highlight the implications of the new findings for our understanding of possible origin of life processes, and argue that materials properties-driven autonomous processes on solid interfaces might have greater role in the development of life than currently considered.
Stable polynomials are a multivariate generalization of real-rooted univariate polynomials. This notion of stability for hypersurfaces can be extended to lower-dimensional varieties, giving rise to positively hyperbolic varieties. I will present results showing that tropicalizations of positively hyperbolic varieties are very special polyhedral complexes with a rich combinatorial structure. This, in particular, generalizes a result of P. Brändén showing that the support of a stable polynomial must be an M-convex set.
by
Quentin Brissaud
From Norsar
Hosted by Valerie Maupin
Doctoral candidate Nancy Saana Banono at the Department of Pharmacy, Faculty of Mathematics and Natural Sciences, is defending the thesis "Functional analysis of psychiatric risk genes in zebrafish (Danio rerio): a focus on the L-type voltage-gated calcium channel subtypes Cav 1.2 and Cav 1.3" for the degree of Philosophiae Doctor.
Title: IPCC-AR6 Chap. 6: Short-lived climate forcers
Speaker: Terje Berntsen, University of Oslo
The Information System Seminar Series features, Thomas Hylland Eriksen, Professor of Social Anthropology, UiO
Doctoral candidate Souvik Bose at the Institute of Theoretical Astrophysics, Faculty of Mathematics and Natural Sciences, is defending the thesis "On the dynamics of spicules and mass flows in the solar atmosphere" for the degree of Philosophiae Doctor.
Marginal maximum likelihood estimation of longitudinal latent variable models for ordinal observed variables is challenging due to the high latent dimensionality required to accurately model residual dependencies for repeated measurements. We use second-order Laplace approximations to the high-dimensional integrals in the marginal likelihood function for longitudinal item response theory models and implement an efficient estimation method based on the approximations. The method is illustrated with items from the Montreal Cognitive Assessment, administered at four time points in a Hong Kong study of aging and well-being. We discuss the limitations of the proposed estimation method and outline a potential extension to the approach that uses a dimension-reduction technique.
Mathijs Janssen (University of Oslo): Electrolyte relaxation near electrified surfaces—from flat plates to nanoporous supercapacitors
Welcome to our GEOHYD Lunch Seminar Friday 1th of October @ 12:15 in Aud. 2, Geology building or via videolink using Zoom. The seminar is helt by Andreas Alexander, Dept. of Geosciences.
Welcome to our GEOHYD Lunch Seminar Friday 1th of October @ 12:15 in Aud. 2, Geology building or via videolink using Zoom. The seminar is helt by Andreas Alexander, Dept. of Geosciences.
Dr. Avijeet Prasad, Rosseland Centre for Solar Physics (RoCS), UiO.
In a famous paper, Geir Ellingsrud and Stein Arild Strømme use the Atiyah-Bott localization theorem in equivariant cohomology to compute the number of complex twisted cubics on a complete intersection. Motivated by results from A1-homotopy theory there is a new way of doing such enumerative counts which works over an arbitrary base field, not only the complex numbers. Recently, Marc Levine proved a version of Atiyah-Bott localization for this new way of counting.
In the talk I will recall the classical Atiyah-Bott localization theorem and explain how one can use it in enumerative geometry. Furthermore, I will explain how this new way of counting works and present some results about twisted cubics on complete intersections counted this way. This is based on joint work with Marc Levine.
by
James Head
From Brown University
Hosted by Stephanie Werner
Title: IPCC-AR6 Chap. 5: Global carbon and other biogeochemical cycles and feedbacks
Speaker: Joeri Rogelj, Imperial College London
The Information System Seminar Series features, Michael D. Myers, Professor of Information Systems in the Department of Information Systems and Operations Management at the University of Auckland Business School, New Zealand
This research seminar presents the new EU-funded project JCOP (Joint Cybersecurity Operations Project) where IFI is a partner.
Doctoral candidate Muhammad Hassaan at the Department of Geosciences, Faculty of Mathematics and Natural Sciences, is defending the thesis Evaporite-influenced rift basins and salt tectonics in the southeastern Norwegian Barents Sea for the degree of Philosophiae Doctor.
Doctoral candidate Helene Birkelund Erlandsen at the Department of Geosciences, Faculty of Mathematics and Natural Sciences, is defending the thesis Perturbing and constraining Norway's surface water and energy balance for the degree of Philosophiae Doctor.
Doctoral candidate Trygve Kvåle Løken at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, is defending the thesis Experiments and new observation techniques related to wave-ice interactions for the degree of Philosophiae Doctor.
Welcome to our GEOHYD Lunch Seminar Friday 24th of September @ 12:15 in Aud. 2, Geology building or via videolink using Zoom. The seminar is helt by Danielle M. Barna, Dept. of Geosciences.
Welcome to our GEOHYD Lunch Seminar Friday 24th of September @ 12:15 in Aud. 2, Geology building or via videolink using Zoom. The seminar is helt by Danielle M. Barna, Dept. of Geosciences.
Doctoral candidate Sarah Hjorth Andersen at the Department of Pharmacy, Faculty of Mathematics and Natural Sciences, is defending the thesis "Childhood outcomes after prenatal exposure to analgesics or antibiotics" for the degree of Philosophiae Doctor.