Tidligere arrangementer - Side 80

Emil Rivera-Thorsen, Postdoc, ITA

Biomaterials hosts an open seminar on bone-anchored implants and the ramifications of increasing antimicrobial resistance on implant-related infections.

Abstract: Recently, Steve Kaliszewski, Tron Omland, and I have been investigating the following theorem of Pedersen: two actions of a compact abelian group on C*-algebras A and B are outer conjugate if and only if there is an equivariant isomorphism between the crossed products that respects the positions of A and B. We upgraded this to nonabelian groups (using coactions on the crossed products), and then searched for examples showing that the last condition (on the positions of A and B) is necessary. We failed. This lead us to formulate the "Pedersen Rigidity Problem": if the crossed products of A and B are equivariantly isomorphic, are the actions on A and B outer conjugate? We have been finding numerous "no-go theorems", which give various sufficient conditions for Pedersen Rigidity. Quite recently we have done this for ergodic actions of a compact group, assuming that the actions have "full spectrum". In fact, these actions are (not just outer) conjugate if and only if the dual coactions are. I will summarize our progress on the Pedersen Rigidity Problem and outline the proof of the no-go theorem for these compact ergodic full-spectrum actions.

Guest lecture by Dr. Pedro Jimenez-Mejias, The New York Botanical Garden.

Guest lecture by Associate professor Marcia J. Waterway, McGill University - Montreal, Qu¨¦bec

We will have a ¡°mingle¡± meeting. There will be updates from Kristine and Per on the running of the institute. But fear not, there will also be plenty of time for informal chat and eating of cake. All are welcome to the lobby on the first floor.

Kimberley Dodge-Kafka, Associate Professor at the Department of Cell Biology at the University of Connecticut, will give a lecture titled, "mAKAP- a master regulator of cardiac hypertrophy"

The Dean of Research, Linda H. Bergersen, organizes the Faculty of Dentistry International Research Events.

Tiago Pereira, ITA

Howard Young from the Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada will give a lecture titled, 'Correlating Structure and Function of Human Genetic Variants in Calcium Homeostasis and Cardiac Contractility'

Elisabeth Lunds?r (PhDstudent AQUA)

ESOP seminar. J?rn-Steffen Pischke is a Professor of Economics at the London School of Economics. He will present a paper entitled "Poorly Measured Confounders are More Useful on the Left Than on the Right", co-authored by Zhuan Pei, and Hannes Schwandt.

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 Sahl¨¦n, University of Uppsala

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.

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.

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

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

ESOP seminar. Kjetil Storesletten is a Professor at UiO. He will present a paper entitled ""Barriers to Entry and Regional Economic Growth in China", co-authored by Loren Brandt, and Gueorgui Kambourov.

by Indr? ?liobait?, University of Helsinki, Finland  

I will report on work in progress on calculations of the motivic homotopy groups of MGL (the algebraic cobordism spectrum) over number fields. It is known that pi_{2n,n}(MGL) is the Lazard ring, and pi_{-n,-n}(MGL) is Milnor K-theory of the base field. We will calculate all of pi_{*,*}(MGL) with the slice spectral sequence (motivic Atiyah-Hirzebruch spectral sequence) over a number field. I will give a brief review of the the tools and sketch the main parts of the calculation: The input from motivic cohomology, the use of C_2-equivariant Betti realization and comparison with Hill-Hopkins-Ravenel to determine the differentials, and settle most of the hidden extensions. 

In the past years there has been several publications on the association between acetaminophen during pregnancy and offspring ADHD symptoms. The aim of the webinar will be to present the recent study, discuss what it adds, and discuss what kind of future studies are needed.

ESOP seminar. Mortiz Lenel is a research fellow at the Becker Friedman Institute at the University of Chicago. He will present a paper entitled "Safe Assets, Collateralized Lending and Monetary Policy".