Tidlegare arrangement - Side 24
Line Gaard Pedersen will defend her thesis “Nuclear structure along the Z = 28 and Z = 50 shells — Shell evolution and shape coexistence in 74,76,78Cu and 126Sn” for the degree of Philosophiae Doctor at the University of Oslo, Faculty of Mathematics and Natural Sciences.
Paper cuts are a minor nuisance, but they can lead to life-threatening microbial infections. The physical processes that determine whether paper cuts into the skin, however, remain poorly understood. To explore skin-paper interactions, we designed an experiment in which a piece of paper contacts an artificial finger made from ballistic gelatin. Our experiments suggest that the paper thickness is one of the most important parameters in determining cutting efficacy. A relatively thin sheet often buckles before cutting is initiated, whereas the predominant interaction with thick sheets is indentation. Our preliminary data indicate that a successful paper cut is physically impossible outside a relatively narrow range of thicknesses for a given angle. Finally, the optimal paper cut is explored, and the influence of skin properties and cutting angle is discussed.
Prasanta Gorai, Rosseland Centre for Solar Physics, Institute of Theoretical Astrophysics, University of Oslo.
A Pilot Feasibility Study of Opioid Withdrawal in Patients with Chronic Back Pain
Endelig er det fredag - og det betyr at Abels tårn har direktesending fra Realfagsbiblioteket.
The evolution of commensalism in Passer sparrows
Human activity has altered the evolutionary trajectories and ecological circumstances of nearly every species on Earth. What can this tell us about the processes of adaptation and speciation? Can we take advantage of the human impacts on species as means to study evolution and its intersection with ecology? This is the driving aim of my research group, where we use Passer sparrows as a model system. We are focusing on a number of topics including understanding the evolutionary causes and consequences of human-commensalism, repeated adaptation to environmental changes in introduced populations and convergent adaptation to human environments across all bird species. We do this using a multidisciplinary approach including genomics, phylogenetics and ecological analyses.
Welcome to our weekly lunch seminar held in the dScience lounge with Ana Ozaki.
Velkommen til alle studenter ved Institutt for geofag til geofaglig karrieredag torsdag 22. februar! Programmet for dagen er nå klart.
Halvor Melkild, FI
Weekly Theory Seminar.
C*-algebra seminar by Corey Jones (North Carolina State University)
Morten Hjorth-Jensen (Physics, UiO): Parametric Matrix Models and Machine Learning
Jelena Popovic-Neuber is an Associate Professor in Battery Technology at the Department of Energy and Petroleum Engineering, Faculty of Science and Technology, University of Stavanger.
Doctoral candidate Espen Volnes at the Department of Informatics, Faculty of Mathematics and Natural Sciences, is defending the thesis Distributed Stream Processing: Performance Evaluation and Enhanced Operator Migration for the degree of Philosophiae Doctor.
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Abbas Tariverdi will defend his thesis “Modeling and Control of a Continuum Manipulator for Clinical Automation” for the degree of Philosophiae Doctor at the University of Oslo, Faculty of Mathematics and Natural Sciences.
Doctoral candidate Svein Gunnar Kjøde at the Department of Informatics, Faculty of Mathematics and Natural Sciences, is defending the thesis Entanglement of Systemic Design and Sustainability Transitions for the degree of Philosophiae Doctor.
Tittel: Sequential Monte Carlo in High Dimension
Challenges and Promising Algorithms
Title: Volcanoes, climate and society
Speaker: Ulf Büntgen, University of Cambridge
Welcome to our GEOHYD Lunch Seminar Friday 16th of February @ 12:15 in Aud. 1, Geology building or via videolink using Zoom. The seminar is held by Karianne S. Lilleøren (UiO).
Controlling the spontaneous ruptures of nanoscale liquid thin films is crucial to various applications such as solar cell manufacturing. Over the past few decades, theoretical work based on the long-wave theory of thin liquid films has successfully identified a critical film height, below which the surface nanowaves become linearly unstable, leading to spontaneous rupture. This dewetting in the ‘spinodal regime’ has been repeatedly confirmed in experiments using atomic force microscopy on polymer films. However, ruptures are also observed for thicker films (linearly stable) in a different manner. It is believed that the random (Brownian) movement of particles is the cause of dewetting in this ‘thermal regime’ but the theoretical framework predicting the rupture is missing. In this talk, we present a theory to account for the rupture of a two dimensional linearly stable thin film by utilizing fluctuating hydrodynamics and rare events theory. By modelling the film dynamics with the stochastic thin-film equation (STF) and solving it numerically, we observe rupture in the linearly stable thermal regime and record the average waiting time for rupture. We show that the STF can be rearranged into the form of a gradient flow, which allows us to apply Kramer’s law from the rare events theory to obtain a theoretical prediction of the average waiting time. Molecular dynamics (MD) simulations are also performed and we find good agreements between the numerics, the prediction, and the MD.
Farbod Hassani, Cosmology and Extragalactic Astronomy research group, Institute of Theoretical Astrophysics, University of Oslo.
Endelig er det fredag - og det betyr at Abels tårn har direktesending fra Realfagsbiblioteket.
Is it difficult to set aside time to write? The Academic Writing Centre organsises structured writing sessions for PhDs and Postdocs.
Abstract:
The Section 4 seminar for the Spring 2024 will be held Thursdays 14:15–15:00 in room 1020
How can research shed light on the pandemic of violence against women, and bring it out of the shadows? How can academia contribute to improved sexual rights globally?