Events - Page 13

Time and place: June 1, 2017 1:15 PM, Lille auditorium (Ø157)

Cand.ed. Marianne Løken at the Department of Physics will give a trial lecture on the given topic: "Inkludering i et interseksjonelt perspektiv: Hva sier den internasjonale forskningen om inkludering i STEM-fagene?"

 

Time and place: June 1, 2017 12:15 PM1:00 PM, V414
Time and place: May 31, 2017 1:05 PM2:00 PM, Ø467

Nicolao Fornengo, University of Torino

Anisotropies in the extragalactic electromagnetic emission originated from dark matter represent an emerging tool in the quest for a particle dark matter signal. These anisotropies are due to the cumulative emission from unresolved dark matter structures, which are present at any scale: galaxy clusters, individual galaxies, subhalos inside galaxies. The same structures can be probed by gravitational tracers of the dark matter distribution in the Universe: this is obtained by large-scale-structure surveys, but in the future a good wealth of additional and complementary information will be available from weak lensing surveys. The study of gamma-rays anisotropies and the cross-correlation between the dark matter signal and gravitational tracers offer a novel and powerful opportunity to probe the particle physics nature of dark matter. The talk will introduce details and features of gamma-rays anisotropies and give perspectives of the cross-correlation approach.

(The slides will be available here)

Time and place: May 24, 2017 12:30 PM2:00 PM, Ø467

Kjetil Børkje, University College of Southeast Norway

I will discuss ongoing work on cavity optomechanical systems, where electromagnetic radiation in a cavity interacts with the motion of nano- or microscale objects via radiation pressure. Such interactions have been exploited in order to bring mechanical systems into the quantum regime, but also in order to manipulate light or microwave radiation. Due to a small coupling constant, this has so far involved driving the cavity with a large number of photons. In this talk, I will discuss how single photons can be controlled or detected using optomechanical interactions. In particular, I will explore whether this is possible even if the system is not in the so-called strong coupling regime.

(The slides will be available here)

Time and place: May 12, 2017 1:15 PM, Lille fysiske auditorium

Master in Physics Åsmund Skjæveland at Department of Physics will be defending the thesis Energy Inputs and upflow motion in the cusp for the degree of Ph.D.

Time and place: May 12, 2017 10:15 AM, Lille fysiske auditorium

Doctoral candidate Master in Physics Åsmund Skjæveland at Department of Physics will give a trial lecture on the given topic: Mass escape from Earth's atmosphere

Time and place: May 10, 2017 1:15 PM2:00 PM, Ø467

Chris Kouvaris, CP3-origins Odense

Asymmetric dark matter with sufficiently strong self-interactions might potentially lead to the formation of dark matter compact objects. I will entertain this possibility providing possible ways of distinguishing these “dark stars” from ordinary black holes and other compact objects like neutron stars. I will also discuss some new techniques in dark matter direct detection that could facilitate searches in the sub-GeV mass region.

(The slides will be available here)

Time: May 8, 2017May 12, 2017

See the conference web page for details

Time and place: Apr. 28, 2017 3:15 PM4:00 PM, Seminar room FV414

By Torunn Kjeldstad, from Light and Electricity from Novel Semiconductors (LENS), UiO

Time and place: Apr. 26, 2017 1:05 PM2:00 PM, Ø467

Jon Magne Leinaas, FI

I will discuss how one-dimensional interacting fermion systems, which in the low energy approximation are described by Luttinger liquid theory, can be reformulated as systems of weakly interacting particles with fractional charge and statistics. The approach is to use Landau's phenomenological approach to Fermi liquid theory, with quasiparticles interpreted as adiabatically dressed fermions. In an earlier publication the local charge carried by these excitations has been shown to be a fraction of the fermion charge. I will here focus on the statistics of the quasiparticles and show that by a change of momentum variables the Landau parameters of the generalized Fermi fluid can be transformed to zero. This change in interaction is compensated by a change of the Pauli exclusion, which is consistent with the interpretation of the quasiparticles as satisfying generalized exclusion statistics.

(The slides will be available here)

Time and place: Apr. 21, 2017 1:15 PM, Lille fysiske auditorium (V232)

Master in Physics Røthe Arnesen at Department of Physics will be defending the thesis "Image guided strategies for individualised radiotherapy of locally advanced cervical cancer" for the degree of PhD.

Time and place: Apr. 21, 2017 10:15 AM, Lille fysiske auditorium (V232)

Doctoral candidate Master in Physics Marius Røthe Arnesen at Department of Physics will give a trial lecture on the given topic:

"The role of proton therapy vs. an MRI-LINAC in the treatment of cervical cancer?"

 

Time and place: Apr. 19, 2017 1:05 PM2:00 PM, Ø467

Tom Theuns, Durham University

Gas in between galaxies produces a forest of absorption lines in the spectra of bright objects such as distant quasars. This "Lyman-alpha forest" arises due to absorption by a sprinkling of neutral hydrogen in the otherwise highly ionised intergalactic gas, with many  lines forming in mildly over dense, or indeed under dense intervening structures. These modest fluctuations can be simulated quite accurately, and comparing mock spectra to the exquisitely high resolution and high signal-to-noise observed spectra allows tight constraints on the nature of the absorbers.

In this talk, I will concentrate on what such as comparison tells up about the temperature and ionisation state of the gas, and explain how these measurements can also put tight constraints on any free streaming due to warm dark matter.

(The slides will be available here)

Time and place: Apr. 5, 2017 1:15 PM, Lille fysiske auditorium (V232)

Master of Science Anne Schad Bergsaker at Department of Physics will be defending the thesis "An experimental study of deformation processes in chalk and calcite" for the degree of PhD

Time: Apr. 5, 2017 10:15 AM4:00 PM

Trial lecture: Compaction in carbonate reservoirs - experiences and challenges regarding oil recovery (10:15)

Dissertation: An experimental study of deformation processes in chalk and calcite (13:15)

Time and place: Apr. 5, 2017 10:15 AM, Lille auditorium (Ø157)

Doctoral candidate master of Science Anne Schad Bergsaker at Department of Physics will give a trial lecture on the given topic: Compaction in carbonate reservoirs- experiences and Challenges regarding oil recovery.

 

Time and place: Mar. 29, 2017 1:15 PM, Auditorium 1, Helga Engs hus

Master of Science Sunniva Rose at Department of Physics will be defending the thesis Aspects of the Thorium fuel cycle for the degree of Philosophiae doctor.

Time and place: Mar. 29, 2017 10:15 AM, Auditorium 1, Helga Engs hus

Doctoral candidate Master of Science Sunniva Rose at Department of Physics will give a trial lecture on the given topic: "Cosmic fission: the synthesis of the heavy elements and the role of fission."

 

Time and place: Mar. 24, 2017 3:15 PM4:00 PM, Seminar room FV414

By Oliver Pabst from the BioImpedence group at the Department of Physics, University of Oslo.

Time and place: Mar. 22, 2017 1:05 PM2:00 PM, Ø467

Aurel Schneider, ETH Zürich

Observations of small and intermediate cosmological scales provide an active frontier for dark matter (DM) research. I will talk about how DM scenarios affect structure formation, leading to potentially observable signals in current and future galaxy surveys.

(The slides will be available here)

Time and place: Mar. 16, 2017 1:15 PM, Aud 3, Helga Engs hus

Master in Physics Endre Grøvik at Department of Physics will be defending the thesis Multimodal Dynamic MRI for Structural and Functional Assessment of Cancer for the degree of Philosophiae doctor.

Time and place: Mar. 16, 2017 10:15 AM, Helga Engs hus, aud 3

Doctoral candidate Master in Physics Endre Grøvik at Department of Physics will give a trial lecture on the given topic: "Safety of MRI contrast agents."

 

Time and place: Mar. 10, 2017 3:15 PM4:00 PM, Seminar room FV414

By Dr Clare E. Bond from the School of Geosciences, Department of Geology and Petroleum Geology, Aberdeen Univeristy, UK

Time and place: Mar. 8, 2017 1:05 PM2:00 PM, Ø467

Aritra Gupta, HCRI, Allahabad

The most widely studied scenario in dark matter phenomenology is the thermal WIMP (Weakly Interacting Massive Particle) scenario. Inspite of numerous efforts to detect WIMP, till now we have no direct evidence for it. A possible explanation for this non-observation of dark matter could be because of its very feeble interaction strength and hence, failing to thermalise with the rest of the cosmic soup. In other words, the dark matter might be of non-thermal origin where the relic density is obtained by the so called freeze-in mechanism. Furthermore, if this non-thermal dark matter is itself produced substantially from the decay of another non-thermal mother particle, then their distribution function may differ in both size and shape from the usual equilibrium distribution. In this talk I will discuss about such a non-thermal (fermionic) dark matter scenario in the light of a new type of U(1)B-L model. The model is interesting, since, besides being anomaly free, it can give rise to neutrino mass by Type II see-saw mechanism. Moreover, we will see, that it can accommodate a non-thermal fermionic dark matter as well. Starting from the collision terms, ...(cont. below)

(The slides will be available here)

Time and place: Mar. 3, 2017 3:15 PM4:00 PM, FV414

By Alvaro Köhn-Luque from the Institute of Basic Medical Sciences (IMB), UiO.