• 25.05.2018
  • Press release
  • Swiss Academy of Sciences

SCNAT honours the four best dissertations in sciences

Preisträgerin und Preisträger Prix Schläfli 2018
Image: Manu Friederich
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Preisträgerin und Preisträger Prix Schläfli 2018
Preisträgerin und Preisträger Prix Schläfli 2018 (Image: Manu Friederich)

The storage of radioactive waste, the pollination of plants, the use of solar energy, and the mathematical parsing of knots and surfaces – the Swiss Academy of Sciences (SCNAT) will honour the four most important discoveries and solutions by young researchers at Swiss universities with the Prix Schläfli 2018 in Bern on 25 May. Alexandre Bagnoud (Geosciences), Livio Liechti (Mathematics), Hester Sheehan (Biology) and Xiaojiang Xie (Chemistry) win the prize for discoveries made while working on their dissertations. The Prix Schläfli has been awarded since 1866.

"These are fantastic examples of cutting-edge research: the four young prize winners have revealed pivotal insights and are helping to find solutions to major issues", says Marcel Tanner, President of SCNAT. Every year, the Prix Schläfli is awarded to the four best natural science dissertations.

For his dissertation at the École Polytechnique Fédérale de Lausanne, Alexandre Bagnoud demonstrated how microbial communities can make the storage of radioactive waste safer. At the University of Geneva, Xiaojiang Xie developed an entirely new way of converting solar energy into electricity. While studying at the University of Bern, Hester Sheehan decoded genetic and evolutionary mechanisms that can be used by flowering plants to attract new pollinators. And at the University of Bern, Livio Liechti developed new perspectives on knot theory and surface geometry.

  • Associations

Prix Schläfli 2018 Biologie: Hester Sheehan
  • 25.05.2018
  • Swiss Academy of Sciences
  • news

Prix Schläfli 2018 in Biology: Hester Sheehan

Those who frequent nightclubs know that when they wear white, their clothes take on a special glow in UV light. But researchers took a long time to realise that plants have a very similar "nightlife": the ways in which the colours of flowers determine which pollinating insects and birds they will attract have long been an important field of research, but the researchers – who mostly worked during normal working hours – only focused on the situation during daylight, on bright and vibrant flowers and eyes that specialise in seeing colour. In her research work, Hester Sheehan also looked at the way this phenomenon works during the night: boring white petunias that appear midnight black in the UV spectrum. An eye-catcher for nectar-hunting moths that are active during the night.
Xiaojiang Xie
  • 25.05.2018
  • Swiss Academy of Sciences
  • news

Prix Schläfli 2018 in Chemistry: Xiaojiang Xie

He is described as a "volcano of scientific ideas" by Eric Bakker, his PhD supervisor at the University of Geneva. Xiaojiang Xie laughs a little when he hears this on the phone in his hometown of Shenzen, to which he returned two years ago. Prior to that, he had been a researcher for five years in Geneva and Paris, where he launched a career that would make the world sit up and take notice.
Livio Liechti
  • 25.05.2018
  • Swiss Academy of Sciences
  • news

Prix Schläfli 2018 in Mathematics: Livio Liechti

We could start with flamenco. Or with doughnuts. But neither of these would really help us to understand Livio Liechti's research. "On the spectra of mapping classes and the 4-genera of positive knots" is the title of the thesis which he submitted a year ago – and anybody who can visualise this has to be a member of a select circle of specialists. Whereby "visualise" is a fairly apt term. "I like the fact that the objects of my field of research are quite visual," says Liechti. He thinks of them three-dimensionally – and his mathematical thought processes also often work on this visual level, and not only in formulas, figures and logical sentences.
Alexandre Bagnoud
  • 25.05.2018
  • Swiss Academy of Sciences
  • news

Prix Schläfli 2018 in Geosciences: Alexandre Bagnoud

Not far from St. Ursanne, the idyllic medieval village on the Doubs, there is another, quite different visitor attraction: swisstopo's Mont Terri rock laboratory. The microbiologist Alexandre Bagnoud often visited this laboratory between 2012 and 2016, not as a layman curious about optimum conditions for storing radioactive waste, but as an active researcher.
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