OPOMNIK: IJS KOLOKVIJ, sreda, 22. 4. 2020, ob 13.00 uri, dr. Matej Kanduč

[Natasa.Gosevac at ijs.si]

(English version below; the colloquium will be in English.)

 

Vabimo vas na 9. predavanje iz sklopa "Kolokviji na IJS" v letu 2019/20, ki bo v sredo, 22. aprila 2020, ob 13. uri. Predavanje bo v spletnem konferenčnem sistemu zoom in mu lahko prisostvujete tako, da v brskalnik prenesete naslov  <https://zoom.us/j/92481139805> https://zoom.us/j/92481139805 in vtipkate geslo 098963.

Napovednik predavanja najdete tudi na naslovu  <http://www.ijs.si/ijsw/Koledar_prireditev> http://www.ijs.si/ijsw/Koledar_prireditev, posnetke preteklih predavanj pa na  <http://videolectures.net/kolokviji_ijs> http://videolectures.net/kolokviji_ijs. 

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dr. Matej Kanduč

Institut Jožef Stefan, Ljubljana 

Kapljično širjenje okužb

Precejšnje število nalezljivih bolezni se širi z večjimi kapljicami in aerosolom. Kako daleč in kako učinkovito se tovrstne okužbe širijo, je močno odvisno od tega, kako daleč se lahko širijo kapljice, kako hitro in učinkovito se usedajo na površine in kako učinkovito jih z maskami lahko filtriramo. Kljub izjemni pomembnosti je bil ta vidik okužbe deležen presenetljivo skromnega znanstvenega zanimanja. V tem seminarju bomo pregledali fizikalna načela, ki določajo tako o usodi kapljic kot o usodi virusov ujetih v njih. Med različnimi dejavniki, ki vplivajo na prenos okužbe, igra relativna vlažnost osrednjo vlogo. Zaradi nekaterih fizikalnih mehanizmov so številni virusi namreč bolj stabilni pri nižji relativni vlažnosti, kot se denimo pojavi pozimi v zaprtih prostorih in v letalih. Poleg tega nizka relativna vlažnost pospešuje izhlapevanje, tako da lahko ostanki večjih kapljic ostanejo ujeti v zraku v obliki aerosola precej dolgo. Filtriranje aerosola je precej težavna naloga in zahteva posebne filtrirne metode. Na koncu bomo razpravljali o nedavnih raziskavah interakcij aerosoliziranih virusov z različnimi materiali, površinami in s filtri v maskah.

Predavanje bo v angleščini.

Lepo vabljeni!

 

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We invite you to the 9th Institute colloquium in the academic year 2019/20. The colloquium will be held on Wednesday April 22, 2020 at 1 PM. The colloquium will be organized online using the zoom conference platform. To attend the colloquium, please copy the url  <https://zoom.us/j/92481139805> https://zoom.us/j/92481139805; the password is 098963.

To read the abstract click   <http://www.ijs.si/ijsw/Koledar_prireditev> http://www.ijs.si/ijsw/Koledar_prireditev. Past colloquia are posted on   <http://videolectures.net/kolokviji_ijs> http://videolectures.net/kolokviji_ijs.

 

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dr. Matej Kanduč

Jožef Stefan Institute, Ljubljana

 

Droplet spread of infections

 

A large number of infectious diseases are transmitted via large droplets and by airborne routes. How far these droplets can move, how rapidly and strongly they deposit on surfaces or are filtered out by facial masks is related to how far and how effective droplet-borne diseases can be transmitted. Despite its significance, this aspect of infection spread has attracted surprisingly little scientific attention. In this talk, we review the physical principles that govern the fate of the droplets as well as the fate of the viruses encased inside them. Among various factors that influence the transmission, relative humidity plays a paramount role. Many viruses are namely more stable at low relative humidities, as encountered inside buildings in winter and in airliners. Furthermore, low relative humidity speeds up evaporation and thus keeps even initially larger droplets suspended in air as aerosol for extended periods of time. Filtering out the aerosol is rather difficult and requires sophisticated filtering methods. At the end, we discuss recent research developments in interactions of aerosolized viruses with various materials, surfaces, and mask filters.

 

Cordially invited!

 

 

 

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