Tidlegare arrangement - Side 264

Elisabeth Lundsør (PhDstudent AQUA)

By Prof. Bruce M.S. Campbell, Emeritus Professor of Medieval Economic History at The Queen's University of Belfast, Northern Ireland

Andreas Carlson og Jean Rabault

Nature has invented ingenious aerodynamic design solutions, some of which are critical for plants as wind dispersal of seeds and fruits is coupled to their flight performance. This formulates into an optimization problem for plants: large seed wings can lead to increased lift and more efficient dispersion, but are costly for the tree to build and can more easily be trapped in the canopy. Double winged seeds/fruits separate from their tree when a specific level of dessication is reached, and autorotate as they descend to the ground. This leads to the question: how is the wing curvature of seeds/fruits linked to their flight performance? To answer this, we develop a theoretical model that suggests the existence of an optimal wing curvature that yields maximal lift. To further understand the interplay between the flow and the wing geometry, we perform a synthetic seed adaptation by deploying 3D printing of double winged fruits that we use in flight experiments, where we span the phase space of aerial dynamics by changing the of wing curvature and seed/fruit weight. Experiments confirm that there is a sweet-spot in curvature to maximise the flight time consisted with geometrical measurements from a wide range of seeds in Nature. Our results highlights the importance of not curving too much or too little for helicopter fruits to have an optimal flight performance.

Martin Sahlén, University of Uppsala

This Friday, November 24th, we're discussing a paper by Uyeda et al. (2017): "A General Model for Estimating Macroevolutionary Landscapes".

Hope to see you there!

Elisabeth Seland

In my job as research adviser, I receive a lot of questions about rights, possibilities and problems in connection with scientific publishing and open access. Both EU and the Norwegian Research Council have rules about this, and there is also a UiO policy in place that is relevant for all employees. I will give a short presentation to try to clear up what you have to, must, may, could and should related to Open access. In my experience many of you have the same questions about these issues, so I hope you bring your questions with you and we can address them in the seminar.

Master i sosiologi Hannah Helseth ved Senter for tverrfaglig kjønnsforskning og Institutt for sosiologi og samfunnsgeografi vil forsvare sin avhandling for graden ph.d. (philosophiae doctor).

Fornuft og følelser. Muslimers argumenter for kvinners rettigheter i medieoffentligheten fra 2000 til 2012

Våre kandidater skal lykkes faglig og profesjonelt. I andre semester ønsker vi å fokusere spesielt på grunnleggende skriftlig kommunikasjon.

Vet du hvem du deler hus med? Norsk Innemiljøorganisasjon presenterer: Våre vanligste samboere!

I will discuss the differential structure in the mod 2 Adams spectral sequence for tmf, leading to its E_\infty-term.  These calculations were known to Hopkins-Mahowald; in their current guise they are part of joint work with Bruner.

Jan Heisig, RWTH Aachen

The origin and nature of the dark matter in the Universe is one of the most pressing questions in fundamental physics. The combination of particle physics and cosmology has proven to be a successful avenue leading to the well-established theory of big bang nucleosynthesis that explains the primordial abundances of light elements. In the similar manner an extrapolation to even earlier times in the Universe has led to the WIMP (Weakly Interacting Massive Particle) freeze-out paradigm - one of the best motivated explanations of the dark matter relic abundance measured today. However, despite an enormous experimental effort no conclusive hint for WIMPs has been found, putting pressure on the WIMP dark matter explanation. In this talk we examine new avenues beyond the standard WIMP picture. We show that scrutinizing the well-known co-annihilation scenario and dropping the commonly made assumption of chemical equilibrium between co-annihilating partners offers new phenomenological possibilities. By solving the full coupled set of Boltzmann equations we find solutions that accommodate the measured dark matter density while requiring very small couplings that are in accordance with current null-results in WIMP searches. [continued below]

(The slides will be available here)

Espen Rusten, BMF-section, Department of Physics

Guest lecture by Professor Dr. Christian Zidorn, Department of Pharmaceutical Biology, Christian-Albrechts-Universität (CAU) Kiel, Germany.

Guest lecture by Professor Dr. Birgit Classen, Department of Pharmaceutical Biology, Christian-Albrechts-Universität (CAU) Kiel, Germany.

Inhibering av reseptor tyrosin kinase AXL i melanoma celler ved bruk av BGB324  

CIENS inviterer til frokostseminar med tema: Klima og forurensninger i Arktis. Hør flere foredrag fra Arctic Monitoring and Assessment Programme (AMAP) om dette.

Late Lunch Talk by Arthur Porto, CEES, University of Oslo

The Modular Symmetric Renormalization Group Flow of the Quantum Hall Effect

Med utgangspunkt i et bredt spekter av problemstillinger inviterer Det Norske Videnskaps-Akademi til tverrfaglig, populærvitenskapelig seminar om vann, med en rekke fremragende foredragsholdere. Seminaret er åpent for alle, men krever påmelding. For program og påmeldingsskjema, følg denne lenken. 

Siri Fjellheim from Norwegian University of Life Sciences (NMBU), will give the talk entitled "Life at high latitudes: the adaptive basis for successful diversification of the grass subfamily Pooideae to temperate regions"

by Indrė Žliobaitė, University of Helsinki, Finland  

Magnetically induced current densities of electronic excited states at the MCSCF level

In this talk, I will present recent results about magnetically induced currents for low-lying electronic states at the MCSCF level of theory. Based on the strength of  current-density susceptibility, we will discuss (anti)aromaticity of the electronic states. 

Siv.Ing Karoline Gangestad Primdahl ved Farmasøytisk institutt vil forsvare sin avhandling for graden ph.d: Stereoselective Synthesis of Oxygenated Polyunsaturated Fatty Acid Mediators and Ivestigation of Biosynthetic Pathways.

Welcome to our GEOHYD Lunch Seminar Friday 17th November @ 12:15 in Aud 1, The Geology building. The seminar is helt by Dr Joel Fiddes visiting from Switzerland.