Tidligere arrangementer - Side 4

Fyrste litter?re instituttseminar denne v?ren er med professor Ronny Spaans og om Olav Nygard sitt forfattarskap.

Qombine presentation by Delphine Martres (UiO): postponed to 5 March 2025

Eidmant? Kala?inskait?-Zavi?ien? (Vytautas Magnus University) will present ongoing work on Lithuanian phrasing and prosodic hierarchy

We are welcoming Simon Henriet from EMBL partner, the Michael Sars Centre in Bergen. He will present his work: "Reprogramming intron recognition at the base of the vertebrate phylum".

Department seminar. Jerry Montonen is a PhD student in Economics at Aalto University and Helsinki GSE. He will present the paper "Dating and Breaking Up With the Boss: Benefits, Costs and Spillovers" (written with David Macdonald and Emily Nix).

Recent advances in experimental techniques have enabled remarkable discoveries and insight into how the dynamics of thin gas/vapour films can profoundly influence the behaviour of liquid droplets: drops impacting solids can ¡°skate on a film of air¡± [1], so that they can ¡°bounce off walls¡± [2,3]; reductions in ambient gas pressure can suppress splashing [4] and initiate the merging of colliding droplets [5]; and evaporating droplets can levitate on their own vapour film [7] (the Leidenfrost effect). Despite these advances, the precise physical mechanisms governing these phenomena remain a topic of debate.  A theoretical approach would shed light on these issues, but due to the strongly multiscale nature of these processes brute force computation is infeasible.  Furthermore, when films reach the scale of the mean free path in the gas (i.e. ~100nm) and below, new nanoscale physics appears that renders the classical Navier-Stokes paradigm inaccurate.

In this talk, I will overview our development of efficient computational models for the aforementioned droplet dynamics in the presence of gas nanofilms into which gas-kinetic, van der Waals and/or evaporative effects can be easily incorporated [8,9].  It will be shown that these models can reproduce experimental observations ¨C for example, the threshold between bouncing and wetting for drop impact on a solid is reproduced to within 5%, whilst a model excluding either gas-kinetic or van der Waals effects is ~170% off!  These models will then be exploited to make new experimentally-verifiable predictions, such as how we expect drops to behave in reduced pressure environments.  Finally, I will conclude with some exciting directions for future work.

[1] JM Kolinski et al, Phys. Rev. Lett.  108 (2012), 074503. [2] JM Kolinski et al, EPL.  108 (2014), 24001. [3] J de Ruiter et al, Nature Phys.  11 (2014), 48. [4] L Xu et al, Phys. Rev. Lett. 94 (2005), 184505. [5] J Qian & CK Law, J. Fluid. Mech. 331 (1997), 59.  [6] KL Pan J. Appl. Phys. 103 (2008), 064901. [7] D Qu¨¦r¨¦, Ann. Rev. Fluid Mech. 45 (2013), 197.  [8] JE Sprittles, Phys. Rev. Lett.  118 (2017), 114502.  [9] MV Chubynsky et al, Phys. Rev. Lett.. 124 (2020), 084501.
Much of this work is based on a recent Annual Review: JE Sprittles, Ann. Rev. Fluid Mech. 56 (2024), 91.

Andreas Snildal er ph.d. i historie fra Universitetet i Oslo med en avhandling om det norske forbudet mot j?disk slaktem?te fra 1929.

H?r Karen Gammelgaard snakke om sin nye bok om spr?kpolitikk i slaviske land.

Department seminar. Jinglun Yao is a visiting postdoctoral researcher at the Institute for International Economic Studies at Stockholm University. He will present the paper "Knowledge is (Market) Power".

A talk by Caleb Carter, associate professor of Japanese religions and Buddhist studies at Kyushu University. 

Velkommen til lansering av den nylig publiserte The Routledge Handbook of Gender Archaeology, redigert av Marianne Moen, Kulturhistorisk museum og Unn Pedersen, Institutt for arkeologi, konservering og historie. 

The internal waves in consideration are generated locally in combination by:
1) the North Atlantic Current (NAC) that flows along the Norwegian shelf (average speed 0.3 m/s),
2) the local tide (dominant 24 hr mode),
3) the particular shelf geometry,
4) the seasonal pycnocline (at 20 m depth). The typical amplitude is 50 m. The local depth where they exist is 100 m (approx.).
The local internal wave speed of 0.4 m/s is comparable to the current speed.

The wave generation process occurs in a sequence of:
A) locally large depressions of the internal tide occurring at the lee side of two shallow ridges,  
B) the depressions are orthogonal to the current,
C) the depressions move slowly against the current, and
D) eventually fission into nonlinear-dispersive wave groups,
E) they propagate upstream against the current,
F) they are recorded on satellite images and is visible by eye.
 

In a recent RCN-funded project (ECOPULSE) 2020-2023 including research groups at UiO, the Norwegian Meteorological Institute and the Institute of Marine Research in Bergen, field experiments of the mother wave in points A) and C) were undertaken during July-September 2021 and 2022. The measurements show that the waves break and mix in the entire water column by convective breaking in the upper part of the water column, shear instability within the pycnocline, and by a variant of a shear instability near the bottom. The field measurements document the local wave properties and the initial phase of the fission process. The Vester?len-Lofoten area is of immense political interest because of a) its traditional fisheries and breeding ground for the North Atlantic and Barents Sea Cod and other species, where also a cold water coral reef is located right where these waves are generated.  The waves do also extend across NORDLAND VII, an oil / gas field which may be considered for exploitation. Preliminary results will be presented.

Annalisa Pillepich, Max Planck Institute for Astronomy, Heidelberg

C*-algebra seminar by David Jaklitsch (University of Oslo).

by Assoc Prof Judith Reindl,  Biophysics and Medical Physics, Department of Physics, UiO.

On 13 February, Dr. Brice Laurent (CSI, Mines Paris PSL) will give a guest lecture on the occasion of his visit to the TIK Centre. The lecture is open, and should be of interest to anyone in the field of Science and Technology Studies (STS).

The Departmental Seminar Series features Rosa Cordillera A. Castillo, substitute professor of public anthropology at the Institute of Anthropology and Cultural Research, University of Bremen.

Dr. Santi Roca-F¨¤brega, Division of astrophysics, Department of Physics, Lund University

?pne forelesninger av Trond H. Torsvik, Sarah Johnson, Liv Hornek?r og Tue Hassenkam. Arrangementet holdes p? engelsk.

Nettverk for maskulinitetsforskning inviterer sine medlemmer til et seminar om menns vold mot menn. 

Tero Aittokallio, group leader in computational systems medicine at Oslo University Hospital, will present his work "From single-cell profiling to effective drug combinations".

Department seminar. Florian Grosset is an Assistant Professor at CREST, ENSAE, Institut Polytechnique de Paris. He will present the paper "Complementarities in Labor Supply: How Joint Commuting Shapes Work Decisions" (written with Aletheia Donald).

Arkeologisk fredagsseminar med Judyta Zawalska og Kjetil Loftsgarden fra Kulturhistorisk museum, som vil presentere det p?g?ende forskningsprosjektet: "Eidsborg rock - production and trade of whetstones in the Viking Age".

Seminaret vil foreg? p? b?de norsk og engelsk.

Velkommen!