Previous events - Page 220

Mechanisms of Risk for Cardiovascular Disease Related to Welding

Diseases can induce detectible genetic changes in host populations by exerting infectious pressure. It has been hypothesized that past plague pandemics have shaped susceptibility to infections in modern European populations. In this journal club, we will discuss immune pathways that have been shaped by convergent evolution in European and Rroma populations in response to plague and other infections.

”DNA damage in Arctic seabirds: baseline, sensitivity to oxidative stress and association to contaminants”

”Thermal reaction norms for larval Atlantic cod (Gadus morhua). Exploring population differences on a micro-geographic scale”

Clara Froment, Postdoc , ITA

Join us on PharmaTox open seminar series.

Attendance is free and open for everybody. Registration is required.

Estimates of fishing mortality commonly used in stock assessment models are often conditional on restrictive assumptions about natural mortality. However, integrating data from various sources in bayesian state-space models can allow to independently estimate mortalities of different sources.

This thursday, at the Speciation Journal Club, we will discuss a paper entitled "detection of human adaptation during the past 2000 years" by Field et al. 2016 in Science.

Tommaso Dorigo, INFN Padua

The CDF collaboration led for two decades the investigation of the high-energy frontier in the search for new physics at the highest energies until then achieved, provided by the Tevatron collider. In a recently published book the author describes how the experiment handled several unexplained phenomena found in the data, and the complex sociology of a large collaboration divided by different feelings on how to deal with those unexpected findings. The seminar will start by discussing the history of those anomalies and their resolution, and then focus on the statistical problem of defining a proper discovery level for new phenomena and on the non-trivial issues it entails.

Late Lunch Talk by Sergio Magallanes Argany, University of Extremadura

Given a Nisnevich sheaf (on smooth schemes of finite type) of spectra, there exists a universal process of making it 𝔸¹-invariant, called 𝔸¹-localization. Unfortunately, this is not a stalkwise process and the property of being stalkwise a connective spectrum may be destroyed. However, the 𝔸¹-connectivity theorem of Morel shows that this is not the case when working over a field. We report on joint work with Johannes Schmidt and sketch our approach towards the following theorem: Over a Dedekind scheme with infinite residue fields, 𝔸¹-localization decreases the stalkwise connectivity by at most one. As in Morel’s case, we use a strong geometric input which is a Nisnevich-local version of Gabber’s geometric presentation result over a henselian discrete valuation ring with infinite residue field.  

The advances on the Milnor- and Bloch-Kato conjectures have led to a good  understanding of motivic cohomology and algebraic K-theory with finite  coefficients.  However, important questions remain about rational motivic  cohomology and algebraic K-theory, including the Beilinson-Soulé vanishing  conjecture.  We discuss how the speaker's "connectivity conjecture" for  the stable rank filtration of algebraic K-theory leads to the construction  of chain complexes whose cohomology groups may compute rational motivic  cohomology, and simultaneously satisfy the vanishing conjecture.  These  "rank complexes" serve a similar purpose as Goncharov's candidates for  motivic complexes, but have the advantage that they have a precise  relation to rational algebraic K-theory.

Thomas Schellenberger at the Department of Geosciences will be defending his dissertation: Analysis of glacier surface velocity using repeat Synthetic Aperture Radar (SAR) images

Tone Bratteteig, Professor - Research Group for Design of Information Systems

This Friday we'll discuss a paper from the future American Naturalist presenting a new tool; "Phylogenetic ANCOVA: Estimating Changes in Evolutionary Rates as Well as Relationships between Traits" by Fuentes-G., Housworth, Weber and Martins.

Join in!

Doctoral candidate Thomas Schellenberger at the Department of Geosciences will give a trial lecture on the given topic: Ice and Oceans: The impact of a melting cryosphere on ocean circulation

Isolation and Characterization of Cancer-Derived Exosomes

Sebastian Wild, DESY Hamburg

One of the most promising strategies to probe WIMP dark matter is direct detection, i.e. the search for nuclear recoils produced by the elastic scattering of dark matter particles. After giving a general introduction to the theoretical framework and experimental status of direct detection, I will present recent developments which allow to interpret the experimental data without the need to specify the (unknown) velocity distribution of dark matter, called "halo-independent methods". Specifically, I will discuss to what extent future experiments can pinpoint the particle physics properties of dark matter in a halo-independent way. I will also present a novel approach to derive upper limits on the scattering cross section of dark matter using already existing experiments, again without the need to specify the velocity distribution.

(The slides will be available here)

The so-called Koras-Russell threefolds are a family of topologically

contractible rational smooth complex affine threefolds which played an

important role in the linearization problem for multiplicative group

actions on the affine 3-space. They are known to be all diffeomorphic to

the 6-dimensional Euclidean space, but it was shown by Makar-Limanov in

the nineties that none of them are algebraically isomorphic to the affine

3-space. It is however not known whether they are stably isomorphic or not

to an affine space. Recently, Hoyois, Krishna and Østvær proved that many

of these varieties become contractible in the unstable A^1-homotopy

category of Morel and Voevodsky after some finite suspension with the

pointed projective line. In this talk, I will explain how additional

geometric properties related to additive group actions on such varieties

allow to conclude that a large class of them are actually A^1-contractible

(Joint work with Jean Fasel, Université Grenoble-Alpes).

By Malin Pinsky from Rutgers University, United States

Tomi Koivisto, NORDITA