BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:Leçons inaugurales Profs Tamar Kohn et Konrad Steffen DTSTART:20141202T171500 DTEND:20141202T191500 DTSTAMP:20261017T153819Z UID:be58e8612113b4ebd5906e2332d8285e4f65dd3ead257efd15680967 CATEGORIES:Inaugural lectures - Honorary Lecture DESCRIPTION:Profs Tamar Kohn et Konrad Steffen\n17h15: Leçon inaugurale d e la Prof. Tamar Kohn\, professeure associée de chimie environnementaleBi o:\nTamar Kohn studied Environmental Sciences at ETH Zurich\, where she re ceived her diploma in 1999. In 2000\, she moved to Johns Hopkins Universit y in Baltimore\, where she obtained a PhD in Environmental Chemistry.  Sh e then spent two years as a post-doctoral fellow at UC Berkeley\, where sh e first started working on waterborne viruses. She moved to EPFL in 2007 a s an assistant professor\, and was promoted to associate professor in Augu st 2014. As the director of the Environmental Chemistry Lab at EPFL\, she worked on the fate of organic micropollutants and viruses in natural and e ngineered system. Currently\, her main goal is to understand the fundament al processes controlling virus disinfection\, to anticipate disinfection f ailure and to devise optimized disinfection strategies. She is interested in both high-end disinfection applications\, as well as water and waste tr eatment technologies suitable for developing countries.Abstract:\nWaterbor ne viruses: can we kill them all?\nDespite the remarkable progress accompl ished in water and wastewater treatment over the past decades\, pathogens in drinking and recreational water continue to pose a threat to public hea lth in both industrialized and developing nations. Pathogenic viruses (e.g .\, Hepatitis A virus or norovirus) present a particular challenge for wat er quality because they are excreted in very high numbers from infected pa tients\, and they are not well removed by physical treatment barriers such as filtration or sedimentation. The safest measure to control waterborne viruses is disinfection. However\, disinfection processes are poorly under stood\, and can even unexpectedly fail. In this presentation\, I will disc uss my group’s advances in understanding the processes involved in virus disinfection by different treatment technologies. I will highlight both m echanisms lead to inactivate inactivation\, as well as some viral “strat egies” to protect themselves from disinfection. Finally\, I will discuss my group’s work in the context of designing optimal treatment strategie s to achieve the best possible virus disinfection.18h00: Leçon inaugurale du Prof. Konrad Steffen\, professeur ordinaire de sciences cryosphérique sBio:\nDr. Konrad (Koni) Steffen is the Director of the Swiss Federal Rese arch Institute WSL and a Professor in Climate and Cryosphere at the School of Architecture\, Civil and Environmental Engineering (ENAC) at EPF-Lausa nne\, and at the Institute for Atmosphere and Climate at the Swiss Federal Institute for Technology (ETH) in Zürich\, Switzerland. He is responsibl e for vital instrumentation deployed in the Arctic to help us monitor the significant changes taking place on the Greenland Ice Sheet.  Without his work\, human knowledge of Arctic climate\, warming\, and melting dynamics would be substantially diminished. He has led field expeditions to the Gr eenland ice sheet\, to Antarctica\, and other Polar Regions for the past 3 9 years to measure the dynamic response of ice masses under a warming clim ate. He has published over 130 peer-reviewed papers and 15 book chapters. He spent 24 years at the University of Colorado and led the Cooperative In stitute for Research in Environmental Sciences (CIRES) before returning to his homeland in July 2012. He is currently the Chair of the Global Climat e Observing System Terrestrial Observation panel\, a member of the NASA Ea rth Science Subcommittee advising board\, the ESA Climate Advisory board\, the Advising Board of the Alfred Wegner Institute for Polar and Marine Sc iences in Germany\, and a lead author of the IPCC AR5 assessment for the C ryosphere chapter.Abstract:\nThe melting of the Greenland Ice Sheet – ho w does it affect the global sea level?\nThe Greenland ice sheet shows an i ncreasing loss of ice during the last decade. The current ice loss in Gree nland corresponds to a global sea level rise of about 1 mm per year. The g lobal sea level rise caused is caused by the melting of ice in Greenland a nd Antarctica\, glacier\, and the thermal expansion of the oceans with a p redicted rise of one meter by the end of this century and large regional d ifferences in both hemispheres. Climate observations (1991-2014) will be d iscussed from the Swiss Camp\, located at the western slope of the Greenla nd ice sheet\, 60 km inland from Ilulissat. The mean annual temperature of -12 °C increased 3.6 °C between 1991 and 2014 (1.7 °C per decade) with large interannual variability in all seasons.  Also the snow melt has in creased which resulted in an increased melt water flow towards the coast. The increase of the meltwater\, which is drained through Moulins in the ic e sheet is causing the acceleration of ice flow through the reduction of f riction at the ice sheet interface with the bedrock.  New insights of thi s underground hydrological channels and cavities were measured with a rada r system and recorded with video cameras. LOCATION:CO1 http://plan.epfl.ch/?lang=fr&room=CO1 STATUS:CONFIRMED END:VEVENT END:VCALENDAR