Tidligere arrangementer - Side 9
In recent years there have been numerous studies on floating films of non-Newtonian fluids due to their application to model the stability of floating ice shelves. Sayag & Worster (2019) showed theoretically that expanding cylinders of shear-thinning fluids can become non-axisymmetrical at the advancing fluid edge, driven by their non-Newtonian rheology. This instability carries over to radially spreading, thinning films of the same material when that fluid floats on a deeper bath of less viscous, but denser, Newtonian fluid.
Experimentally validating these theoretical results has, however, been challenging. Initial experimental exploration using Xanthan gum floating on a dense bath of salt solution shows dramatic non-axisymmetrical patterns. These patterns have their origin in interfacial effects, rather than Sayag & Worster's instability, with the expanding film appearing to fracture under extensional stresses at the fluid edge (Ball et al., 2022).
In this talk, I will present a new set of experiments exploring the instability, in which spreading films of aqueous suspensions of Carbopol and Xanthan gum are floated on a bath of more dense perfluorinated oil. The immiscibility between the bath and floating film prevents the failure of the material under tension and allows comparison against theoretical predictions from a shallow film model (Ball & Balmforth, 2021; Ball & Balmforth 2025).
George Cherry, Rosseland Centre for Solar Physics, ITA, UiO
Department seminar. Lassi Ahlvik is a Professor in Environmental Economics at the University of Helsinki. He will present the paper "Pigouvian Income Taxation" (written with Matti Liski and Mikael M?kimattila).
M?t forfatterne av boken i paneldebatt om bokens sentrale temaer
The Departmental Seminar Series features Doctor Stuart Strange, Department of Culture Studies and Oriental Languages, University of Oslo
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In this lecture, Professor Bi-yu Chang discusses state policies and interventions in constructing ideas of identity and nationhood in Taiwan's educational system.
The Tien Mai is currently a postdoc at FHI. He has held postdoc positions in statistics at NTNU (Trondheim) and in biostatistics at UiO (OCBE). His research spans statistics and machine learning, with a particular interest in PAC-Bayesian analysis. He holds a PhD in Statistics from CREST-ENSAE-ParisTech/Paris Saclay and University College Dublin.
The African Anthropology seminar series features James Wintrup, senior researcher at the Chr. Michelsens Institute (CMI)
Department seminar. Ole-Andreas Elvik N?ss is an Assistant Professor at the Department of Business and Management Science at the Norwegian School of Economics (NHH). He will present the paper "Never-Realized Capital Gains" (written with Lucy Msall, University of Chicago).
Arkeologisk fredagsseminar med Hege Damlien og Guro Fossum fra Kulturhistorisk museum.
PhD candidate Lasse Kr?ger Eliassen at the Department of Biosciences, Faculty of Mathematics and Natural Sciences, is defending the thesis 'Unraveling the microbial eukaryotic parasites of copepods: from individual fitness costs to seasonal dynamics' for the degree of PhD.
The talk will focus on the relationship between speech production and perception in early childhood and the role of pacifiers in language development.
Michael Haahr, Rosseland Centre for Solar Physics, ITA, UiO
I anledning Arnfinn B?-Ryggs nyskrevne Estetisk leksikon p? Pax forlag, Oslo, arrangeres det et ?pent seminar p? Blindern. Seminaret avsluttes med boklansering og forelesning.
Gianina Dru?? (OsloMet/UiO) will present her current research on the Peer Gynt production by Markus&Markus.
Department seminar. John Morrow is a Senior Lecturer affiliated to the Centre for Economic Performance and Centre for Economic Policy Research at Queen Mary University of London. He will present the paper "Firms in Product Space: Adoption, Growth and Competition" (written with Luca Macedoni and Vlad Tyazhelnikov).
Catfished: Bio-surveying the Akobo River Highlands and Curating the East African Database ‘Fishtopia’
Mauro Di Nasso, University of Pisa, will give a talk in the Logic Seminar
In this lecture, Prof. Niki Alsford aims to contribute to a continued effort to reframe the narrative of Taiwan perched on the edge of continent, to instead focus on Taiwan on the edge of ocean.
Bernhard Hollick (IAKH, UiO)
Tatiana Cojocari will examine the impact of EU’s “engagement without recognition” policy on the region’s foreign policy and its population.
Department seminar. Lucas Conwell is a Lecturer at the Department of Economics at University College London. He will present the paper "Privatized Provision of Public Transit".