Tidligere arrangementer - Side 5
Hydrogels are hydrophilic polymer scaffolds surrounded by adsorbed water. From a dry state, they are capable of swelling in volume by up to two orders of magnitude – becoming up to 99% water - whilst still remaining solid (if a little squishy).
Responsive hydrogels lose this affinity for water – sometimes quite profoundly – when an environmental stimulus, such as temperature or pH, transitions beyond a critical value. Conformational changes in the scaffold squeeze the water out, and the gel shrivels dramatically. This volume change is reversible (albeit non-reciprocal), allowing for cycles of activation and deactivation. As such, responsive hydrogels have important and exciting applications in microscale actuators.
This talk will describe some of the big open areas of hydrogel modelling, before detailing two (very) recent unpublished theoretical pieces of work on 1) thermoresponsive displacement pumps for microfluidic devices, and 2) coupling pH-responsive gels to oscillating reactions to enable communication and synchronisation.
Sverker S?rlin innleder om sin nylig utgitte bok (med Eric Paglia) Stockholm and the rise of global environmental governance (CUP, 2024).
Luca Zapelli, PhD student from Department of Physics, University of Milan
by Benjamin J. W. Mills, Professor of Earth System Evolution,
School of Earth and Environment, University of Leeds, UK
QOMBINE seminar by Franz Fuchs and Ruben Bassa (UiO)
Department seminar. Annika Bacher is an Assistant Professor of Economics at BI Norwegian Business School. She will present the paper "Housing and Savings Behavior across Family Types."
Philip Roscoe (University of St Andrews) visits TIK for a seminar charting the structural, technological and social changes that gave rise to the finance we know today, and to ask how critical social scientists are to confront the likes of Elon Musk.
In this final seminar, Stine Engen will present the draft of her PhD thesis titled “On green finance and the turning of climate change into climate risk”.
Mikael Males (ILN, UiO)
Vi feirer professor emeritus Jakob Lothe med lansering av festskriftet ?Narrative Ethics: Negotiating Values?.
The first stage of sea ice formation is often grease ice, a mixture of sea water and frazil ice crystals. Over time grease ice congeals to a solid sea ice cover, often in the form of pancakes. Grease ice is usually not simulated in large-scale sea-ice ocean models, but impacts ocean heat loss and ice growth.
A set of laboratory experiments on frazil and grease ice in a turbulent flow is presented, showcasing the growth process and a frazil ice size spectrum. Existing 1D simulations illustrates how frazil ice crystals remain sub-surface and can aggregate with particles (sediments) in the water. A simple approach capturing basic grease ice properties for 3D climate models is presented and shows a 10-30% increase in mean winter Arctic Ocean heat loss compared to standard simulations. The grease ice layer is ‘hurdled’ towards existing floes and congeals as pancake ice. The onwards transition to a ‘normal’ congealed ice cover is assumed to take place over 24h when ～50 % of the grease has formed solid ice, but new observations are needed to better resolve this transition. Grease ice also dampens waves and simulating this in wave models may be the focus of future research.
In this talk, Dr. Amany Abdelrazek-Alsiefy will discuss key themes from her recent book Modern Egyptian Women, Fashion, and Faith: Discourses and Representations.
Danielle Sponseller, Chalmers University of Technology, Gothenburg.
Positive geometry is a recent branch of mathematical physics which present exciting connections with real, complex and tropical algebraic geometry.
In this talk, we introduce the topic by developing the positive geometry of del Pezzo surfaces and their moduli spaces.
We will analyze their connected components, likelihood equations and scattering amplitudes.
The talk is based on joint work with Early, Geiger, Sturmfels and Yun.
Abstract: I will introduce a certain configuration space associated with a graph, and compute its cohomology ring. It turns out to be related to internal zonotopal algebras, which were introduced in the context of approximation theory and show up in many different contexts.
This is joint work with Colin Crowley, Galen Dorpalen-Barry, and Andre Henriques.
Positroids are a class of matroids that were introduced by Postnikov in 2006 that index a certain stratification of the totally non-negative Grassmannian. These matroids are famously in bijection with a “zoo” of combinatorial objects including Grassmann necklaces and plabic graphs. We introduce a new family of positroids called rook matroids that arise from restricted rook placements on a skew shaped board and discuss it in terms of this zoo. We highlight the transversal structure of rook matroids and the slightly mysterious relationship they share with lattice path matroids. This is joint work with Per Alexandersson and ongoing work with Irem Portakal and Akiyoshi Tsuchiya.
In this lecture Amanda Wasielewski (University of Uppsala) will discuss how text and images interact within AI-models, and what AI-generated images are pictures of.
Helge Jordheim tar oss med p? en langsom vandring gjennom viktige steder i dagens Berlin – og samtidig inn i byens historie.
Gunnar Taraldsen is professor at Department of Mathematical Sciences, NTNU. His current research interest focusses on the foundational principles of statistical inference including quantum probability, artificial intelligence, and machine learning. The aim is to bridge foundations for statistical inferences, to facilitate objective and replicable scientific learning, and to develop analytic and computing methodologies for data analysis.
Earlier research includes quantum mechanics, mathematical physics, measure theory, probability, medical ultrasound, non-linear wave propagation, numerical acoustics, medical statistics, outdoors sound propagation, community noise annoyance, acoustic noise mapping, underwater localization, underwater wave propagation, and spherical microphone arrays.
"Word, Sound and Power" hosts a film screening of the British classic directed by Franco Rosso in Oslo
澳门葡京手机版app下载sprosjektet "Word,Sound and Power" inviterer til filmvisning
The Departmental Seminar Series features lecturer Taras Fedirko, School of Social and Political Sciences, University of Glasgow.
Professor Mi Yung Park and Professor Stephen May will give a presentation on ethical considerations and implications when conducting applied linguistics’ research with Indigenous and/or minoritized participants.
The Section 4 seminar for Spring 2025 will be held on Tuesdays at 09.10 am in room 1020.