31st May – Dedication to Peter Higgs


Our next colloquium will be a Dedication to Peter Higgs on May 31st in Physicum E204.


We are pleased to announce a distinguished session in our spring colloquium series, dedicated to celebrating the legacy of the late Professor Peter Higgs, a British theoretical physicist, University of Edinburgh professor, and the 2013 Nobel laureate in Physics for his groundbreaking contributions to our understanding of the mass of subatomic particles.

This special event will feature two insightful presentations. Professor Kimmo Tuominen, a leading figure in particle physics at the University of Helsinki, will open the session with an exploration of Professor Higgs‘ illustrious career and seminal theoretical work. Following him, Professor Mikko Voutilainen, an expert in experimental particle physics, will focus into the experimental efforts that led to the discovery of the Higgs boson, a cornerstone of the Standard Model of particle physics.

Join us on Friday, May 31, 2024, at 14:15 in Physicum E204. The session is expected to last about 45 minutes. For those unable to attend in
person, we will also offer a Zoom experience:

Meeting ID: 610 8331 4010
Passcode: kumpula

17th May at 14:15: Tanja Kallio

Our next colloquium in the spring series is by Tanja Kallio from Aalto University on May 17th in Exactum B123.

Tanja Kallio, D.Sc. (Tech.), is an associate professor in electrochemistry and physical chemistry at the Aalto University School of Chemical Engineering. Her Electrochemical Energy Conversion Group investigates materials and components for such electrochemical conversion and storage applications as low temperature fuel cells and electrolysers, and lithium and sodium batteries. The core theme is improving sustainability by utilizing materials and energy more efficiently during the conversion processes. The work is carried out in close collaboration with various universities, research organizations and industry and funded majorly by Business Finland, European Union, Jane and Aatos Erkko Foundation and Research Council of Finland. Tanja Kallio is a member of the Hydrogen Europe Research and EC Batteries Europe working groups furthering the research and innovation actions in these fields.

The title of the talk is:

Artificial Cathode Electrolyte Interfaces for Understanding and Engineering of Lithium Battery High-Voltage Cathodes

The event will take place on Friday 17.05.24  at 14:15 in Exactum B123

The event was also be streamed via Zoom: https://helsinki.zoom.us/j/61083314010

Abstract of the talk:

Lithium-ion batteries are in our everyday use in various applications extending from portable devices to vehicles and energy storage. The forecasted exponentially growing need of lithium batteries puts pressure on developing more efficient and sustainable lithium batteries by increasing their lifespan and energy content. I will introduce you one approach for understanding high energy cathode materials operation and ageing – that is fabricating and investigating artificial cathode electrolyte interfaces (ACEI). This approach enables gaining insight into how protective interfaces formed in conventional batteries during the battery operation affect the battery functioning and ageing. Technological relevance of this approach relays on the capability of ACEIs for enhancing battery lifespan without sacrificing the performance.

8th March at 14:15: Pauliina Ilmonen

Our next colloquium in the spring series is by Pauliina Ilmonen from Aalto University on March 8th in Physicum E204.

Pauliina Ilmonen is a professor (tenured associate professor) in Statistics and Mathematical Data Science at Aalto University School of Science. She is also the vice head (in charge of teaching) of the Department of Mathematics and Systems Analysis. She has over a decade of teaching experience from various universities, including University of Tampere, University of Turku, Université libre de Bruxelles, and Aalto University. She teaches several bachelor’s and master’s level courses at Aalto University, and she is the responsible teacher of a minor in Statistics. She is known for her ability to discuss complicated matters in an understandable way. Pauliina Ilmonen chaired the Finnish Statistical Society from February 2018 to January 2022. She is a member of the European Regional Committee of Bernoulli Society, and she is a member of the advisory board of Statistics Finland. She loves statistics and she participates actively in public discussions related to statistics. In 2020 she received the Aalto SCI Scientific communication award.

In her research work, Pauliina Ilmonen focuses on topics in the field of mathematical statistics. Her research group’s most significant research topics are multivariate extreme value theory, invariant coordinate selection (ICS), independent component analysis (ICA), functional data analysis (FDA), change point analysis, and analysis stationary processes. Also pure mathematics is close to Pauliina’s heart. Her research group’s interest there lies on characteristics of meet and join (hyper)matrices. In addition to deriving theoretical results, her group is working on applied topics related to cancer epidemiology and the epidemiology of viruses. Doing applied work enables to contribute to research that may have significant public health implications.

Vice Head (in charge of teaching) of the Department of Mathematics and Systems Analysis

Professor (tenured Associate Professor), Statistics and Mathematical Data Science

PhD (2011, University of Tampere, Major: Biometry, Minor: Epidemiology)


The title of the talk is: On extreme quantile regions

The event will take place on Friday 08.03.24  at 14:15 in Physicum E204

The event was also be streamed via Zoom: https://helsinki.zoom.us/j/61083314010

Abstract of the talk:

Modeling of rare phenomena is of paramount importance in many fields of science and wide variety of application areas of extreme value theory have multivariate problems to solve. Assessing tail behavior is challenging as, e.g., extreme quantile regions corresponding to a very small probability often contain only a few or no observations. We propose a novel affine equivariant extreme quantile region estimator for multivariate heavy-tailed elliptical variables. The estimator is constructed by extending a well-known univariate extreme quantile estimator. Consistency of the estimator is proved under estimated location and scatter. We briefly discuss the estimation of extreme quantile regions under other multivariate (and infinite dimensional) models as well.


26th January at 14:15: Hanna Vehkamäki

Our first colloquium in the spring series is by Hanna Vehkamäki from the University of Helsinki on January 26th.

Hanna completed her PhD in theoretical physics at the University of Helsinki 1998. After that she worked two years at University College London, UK. She returned to University of Helsinki 2000, and was appointed a professor in computational aerosol physics 2009. Since 2001 she has been leading a research group focusing on computational studies of molecular cluster formation in the atmosphere. She is the director of Research Council of Finland Centre of Excellence ‘Virtual Laboratory for Molecular Level Atmospheric Transformations’ 2022-2029. 2011 Hanna founded and then chaired the INAR (Institute for Atmospheric and Earth System Research) equality and well-being group until 2023, and she is currently faculty of science vice dean responsible for equality and work well-being.

The event will take place on Friday 26.1.24 at 14:15, in Chemicum A110.
The event was also be streamed via Zoom, link:

The slides of the talk are available here: Vehkamaki_fys_kollokvio_no_vid_26_1_2024

The title of her talk is: Everyday tips for implementing Kumpula code of conduct

The abstract of her talk reads:

The presentation invites you to contemplate how the Kumpula Campus Code of Conduct https://www.helsinki.fi/en/faculty-science/faculty/kumpula-campus-code-conduct and more generally values it is based on should manifest themselves in the Kumpula community – especially from the point of view the work well-being and equality. The INAR equality and work well-being group has comprised a list of everyday behavior patterns that we should pay attention to when striving to make the workplace culture welcoming to people with diverse backgrounds, and some points from this list are highlighted as examples.

8th December at 14:15: Teemu Siiskonen

The next colloquium in the fall series will take place on December 8) at 14:15. Our speaker will be Teemu Siiskonen, who has been recently appointed as the Professor of Practice at Department of Physics, University of Helsinki.

Teemu did his PhD in nuclear physics at the University of Jyväskylä. After that, he worked at CERN and Finnish Meteorological Institute before coming to STUK (Radiation and Nuclear Safety Authority). At STUK, he worked on the fields of radiation dosimetry, medical use of radiation, environmental surveillance, and emergency preparedness. Currently, he is a deputy director at Measurements and Environmental Monitoring department of STUK. In 2022, Teemu was appointed as the Professor of Practice at Department of Physics, University of Helsinki.

The title of his talk is: Safety and efficacy of modern radiotherapy: Techniques and development toward accurate patient-specific dosimetry.

The event will be held on Friday 08.12.23 at 14:15, in Exactum CK112.

Abstract of the talk:

Modern external beam radiotherapy techniques often rely on small, conformal dynamic beams. Many different beam qualities are used, including  photons, electrons, protons and neutrons. However, the techniques traditionally used to determine the dose may not be reliable in these beams. I will discuss recent developments to improve the accuracy of patient dose determination, with measurements in laboratory and at clinics, and using computational approaches. To avoid adverse side effects, attention must also be paid to the overall exposure of the patient, and I will discuss the methods to assess personal doses from the whole radiotherapy process, including imaging.