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Mr Jonathan Gammeltoft (Master student)25/03/2022, 13:10Presentation
When a patient is submitted to radiotherapy a treatment plan is made. This plan accounts for the energies used in the treatment, the angles from which the energy is delivered and the number of times the patient has to receive treatment i.e number of fractions. In conventional oncology the radiation plan will stay unchanged throughout all the fractions, without regard for minor, long or short...
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Emily Wilbur (Niels Bohr Institute, University of Copenhagen)25/03/2022, 13:30Presentation
Greenland has not always been glaciated, and the ice sheet was likely at a minimum– if it existed at all– about one million years ago (Yau, et al, 2016). Here, the aim is to simulate the last million years of the Greenland ice sheet under the assumption that it incepted on bare bedrock. This is accomplished by melting the ice sheet off of present day topography, which allows us to...
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Gergely Friss25/03/2022, 13:50Presentation
An important problem that molecular astrophysics faces is to understand where, when and how complex organic and prebiotic molecules emerge. To form the basic building blocks of life -- for example amino acids or sugars -- molecules have to go through many complex chemical reactions between many different species. The origins of these biomolecular precursors are an ongoing research field,...
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Helene Pehrsson25/03/2022, 14:40Presentation
During the last interglacial (130.000-110.000 years ago), the climate in Green-land was warmer than today. Modelling has shown a large span of ice sheet mass losses in Greenland, and it is unclear how far back the ice sheet retreated in the North. At present, Eemian ice is widespread along the margin in Northern Greenland suggesting that the Greenland mass loss was less in the North than...
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Martin Ravn25/03/2022, 15:00Presentation
Although we do not yet have an accepted theory of quantum gravity, we can predict some of its features. One such predictions is that space-time fluctuates at tiny distances, perhaps even producing microscopic short-lived "virtual" black holes. These effects are difficult to probe experimentally, because they are only expected to be large at energies and distances approaching the Planck scale....
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Simone Vejlgaard Nielsen25/03/2022, 15:20Presentation
When the neutral hydrogen of the intergalactic medium (IGM) started to ionise, the Universe entered its latest major transition: The Epoch of Reionisation (EoR). Gamma-ray bursts (GRBs), the violent cosmic explosions signaling the death of a star with more than 30 times the mass of our Sun, can via their immense brightness make it possible to perform detailed studies of the IGM during the...
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Lasse Bonn (NBI)25/03/2022, 15:40Presentation
Topological defects are increasingly being identified in various biological systems, where their
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characteristic flow fields and stress patterns are associated with continuous active stress generation
by biological entities. Here, using numerical simulations of continuum fluctuating nematohydrody-
namics we show that even in the absence of any activity, both noise in orientational alignment... -
Victoria Thusgaard Ruhoff25/03/2022, 16:05Poster
Influenza A is a common viral infection spreading among humans and still remains a major societal challenge resulting in annual, global outbreaks with numerous casualties. A critical step in virus dissemination is the budding from the plasma membrane of infected cells. Despite extensive efforts, the mechanism underlying this viral budding event remains largely unsolved, however, the viral...
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Tomás Fernández Bouvier25/03/2022, 16:05Poster
Our aim is to implement an automated quality control assurance method
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for meteorological data. The approach is based on a set of different tests
that probe the spatial, temporal an physical consistency of our data in
a statistical driven method. In order to merge the different outputs, we
propose a statistical framework based on accuracy estimation and opti-
misation of our tests and... -
Zihua Wang (MSc student of Physics)25/03/2022, 16:05Poster
My research on cavity opto-mechanics includes measurements on the transmission
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and scattering loss of the photonic crystal membrane. The method we
took was to build a cavity using a concave mirror as the input window of the
cavity. By measuring the finesse, transmission and reflection at resonance, we
will be able to squeeze some optical information about our membrane out of the
cavity.... -
Albert Sneppen25/03/2022, 16:05Poster
The daily X-shooter spectra of AT2017gfo provides the most detailed information of any Kilonova to date. Indeed, the recently discovered spectral signatures of Strontium (Sr) yields constraints on the ejecta density, expansion velocity and potential asymmetry. In this talk, we present the spectral information hidden within the Sr-lines, while applying the methodology of expanding photospheres....
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Jacob Osman Hjortlund (DARK, Niels Bohr Institute, University of Copenhagen)25/03/2022, 16:05Poster
Lensing using galaxy clusters is a sensitive and promising probe of cosmology, complementing classical probes such as the CMB, SN and BAO. It presents an independent way of probing the background geometry of the universe, and has shown to be sensitive to total matter density and dark energy equation of state parameters. This probe is, however, currently limited by the accuracy of lensing...
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Marie Cornelius (University of Copenhagen)25/03/2022, 16:05Poster
Neutrinos are elementary particles with unique properties that make them ideal probes of new physics beyond the Standard Model. The highest-energy neutrinos known, produced in astrophysical phenomena, offer us an opportunity to look for new fundamental particles at energies not reached by particle accelerators on Earth. One possible new particle is the axion, originally postulated as a...
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Dana Lüdemann25/03/2022, 16:05Poster
The albedo of snow and ice has a strong positive feedback loop that controls the amount of solar radiation absorbed by the surface. Snow melt induced by a surface warming will lead to a decreased albedo that allows for more solar radiation to reach the surface and will further increase the melting and surface warming. In current climate models, the albedo over perennial snow is kept constant...
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Varun Venkatesh25/03/2022, 16:05Poster
Active matter comprises systems of living or synthetic constituents that are constantly driven far away from thermodynamic equilibrium. Here we explore the collective self-organization of active flexible filaments using a numerical model of self-propelled bead chains. We explore phase transitions to and from active turbulent states. In particular, we investigate the perhaps counterintuitive...
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Mr Kaare Endrup Iversen (NBI), Leon B (NBI)25/03/2022, 16:05Poster
The IceCube Detector is a neutrino telescope designed to study the cosmos from deep within the ice sheet of the south pole. A cubic kilometre of ice is used to detect the Cherenkov radiation from charged decay products of neutrinos. With thousands of triggered events every second, sophisticated methods are needed to process the data. Our use of Graphical Neural Networks provides an alternative...
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Marc Jacquart (NBI)25/03/2022, 16:05Poster
The IceCube Neutrino Observatory is a cubic-kilometre Cherenkov detector located at the South Pole. The IceCube Upgrade will improve the detection, reconstruction, and particle identification of atmospheric neutrinos in the GeV energy range using seven additional strings of new multi-PMT photosensors to increase the instrumentation density in the bottom centre of the detector. Neutrino...
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Roberto Forbicia León (Niels Bohr Institute (University of Copenhagen))25/03/2022, 16:05Poster
The theory of General Relativity (GR) stands on two of Einstein's most celebrated ideas: the Equivalence Principle and the statement that "gravity is geometry". The former implements Special Relativity (SR) and forces the geometry of spacetime to be Lorentzian, thus turning the previous statement into "gravity is Lorentzian geometry". It may not be obvious that these two ideas, yet closely...
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Xin Qian, Mr Vasilis Moustakis (Niels Bohr Institute)25/03/2022, 16:05Poster
AdS/CFT correspondence is one of the major developments in theoretical physics, but lack of rigorous proof. It has been showed that planar sector of AdS/CFT can be solved completely, by the miracle tool called $integrability$. We are mainly focusing on the AdS/dCFT, a defected version of AdS/CFT. On the field theory side the full symmetry of $\mathcal{N}=4$ Super Yang-Mills theory is broken,...
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Nga Ying Lo (NBI)25/03/2022, 16:05Poster
A climate model is a canonical example of multi-physics multi-scale modeling that requires a significant amount of computation time to extract signals of climate change, especially in finer resolution configurations. Finer resolution is pertinent because it enhances the fidelity of resolved features, and allows for the representation of missing processes and feedback, such as mesoscale eddies...
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Mr Ioannis Mageiras, Ms Marina Koukouvaou25/03/2022, 16:05Poster
Quasars are manifestations of accreting supermassive blackholes in the centers of galaxies. It is currently uncertain how many quasars there are as quasar selection is known to be biased and incomplete. In this work we use a novel more unbiased quasar selection technique based on machine learning to reach a more reliable and complete census of quasars in a large section of the sky around the...
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Alba García Vázquez (NBI)25/03/2022, 16:05Poster
Bacteria typically grow in communities and this provides them substantial advantages compared to solitary cells. These communities are often comprised of multiple bacterial species leading to the emergence of complex spatial patterns. The emergence of these complex spatial patterns can have a profound effect on bacterial function and survival within the communities. Most experimental studies...
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Salik Sultan25/03/2022, 16:05Poster
A wide range of living and artificial active matter exists in close contact with substrates and under strong confinement, where in addition to dipolar active stresses, quadrupolar active stresses can become important. Here, we numerically investigate the impact of quadrupolar non-equilibrium stresses on the emergent patterns of self-organisation in non-momentum conserving active nematics. Our...
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Alan Oesterle25/03/2022, 16:05Poster
Magnetic induction tomography (MIT) is a method of detecting and imaging conductive objects, based on the detection of induced radio-frequency electromagnetic fields. It is a promising non-invasive method, which can be used for biomedical applications such as the diagnostics of heart diseases. The induced electromagnetic fields are measured by the polarization of light sent through a cell...
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Edis Tireli (NBI), Mr Mads Hyttel (NBI)25/03/2022, 16:05Poster
What is Dark matter? Why is there an asymmetry between matter and anti-matter? Why do neutrinos have
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mass? These three critical questions cannot be answered by the Standard Model of particle physics, despite it’s overwhelming success in describing the results of high-energy experiments at subatomic scales. They play a pivotal role in forming our understanding of the universe from its... -
Rui Liu25/03/2022, 16:05Poster
In this work, we use Differential scanning calorimetry (DSC) to detect the de-
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naturation of pea protein isolate (PPI) with different relative humidity (20% RH
and 80 %RH) in different equilibrium time ( 4 months and 7 days ). Using this
approach, we obtained the temperatures of PPI denaturation and decomposition,
and also concluded that time has an important effect on the redistribution... -
Elloise Fangel-Lloyd25/03/2022, 16:05Poster
Use of EOF and SVD techniques to determine the relative importance of different atmospheric modes, using data of geopotential height, temperature, and others. The NCEP and ERA5 reanalyses are used for this and their results will be compared.
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Felix Frohnert (University of Copenhagen)25/03/2022, 16:05Poster
An important part of quantum condensed matter physics deals with the calculation of phase diagrams of interacting many-body systems. A novel approach for studying these systems is to utilize representation learning. This technique enables the study of quantum states in a human independent manner, as the representation of quantum phenomena is decided on by the AI. Therefore, this approach...
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25/03/2022, 17:45
An honorary prize will be awarded to two presentations (oral and poster) judged to be the "best" overall, based on the content, the visual display and the ability to present the subject. A panel of faculty/supervisors (Heloisa Bordallo (chair), Kim Lefman, Oleg Rychayskiy, Jørgen Peder Steffensen) will judge the presentations and announce the winners.
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25/03/2022, 17:55
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Christian PetersenPresentation
Carrier density-dependent mobility in semiconductor nanostructures
*Christian E. N. Petersen1, Damon J. Carrad1,2, Thierry D. Pomar2, Daria V. Beznasyuk1,3, Jung-Hyun Kang1,3, Gunjan Nagda1,3, Dennis Valbjørn Christensen2, Peter Krogstrup1,3 and Thomas S. Jespersen1,2
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1. Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Denmark
2. Department of Energy...
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