FYS.250 Fysiikan seminaari, 2021-22 torstaisin klo 12:15 alkaen Zoom-kokouksena (Meeting ID: 840 543 3506, https://tuni.zoom.us/j/8405433506) tai sähkötalossa salissa SG312 FYS.250 Physics seminar, 2021-22 on Thursdays starting at 12:15 with Zoom, Meeting ID: 840 543 3506, https://tuni.zoom.us/j/8405433506 or on campus in SG312 https://iki.fi/trantala/opetus/files/FYS.250-Fysiikan.seminaari/schedule.21-22.txt Contact: Tapio.Rantala@tuni.fi or +35840 543 3506 s. 2021 ------- 35 02.09. TR - Tapio Rantala: "What is quantum mechanics?" (E/E) ***** ON CAMPUS IN SG312 ***** 36 09.09. TS - Lauri Salmela: "Neural network prediction of supercontinuum generation dynamics" and Mathilde Hary: "Machine learning control of nonlinear fiber dynamics" (E/E) ***** Zoom ***** 37 16.09. TR - Jarno Tanskanen: "Neuronal cells in a cup - about some aspects of neuronal in vitro electrophysiology" (E/E) ***** Zoom ***** 38 23.09. TR - Kalevi Mursula: "Winds of winter: How can the Sun affect the polar vortex and our winter weather" (/E) ***** Zoom ***** 39 30.09. TR - Joonas Keski-Rahkonen: "What is quantum chaos?" (/E) ***** Zoom ***** 40 07.10. JN - Jouko Nieminen: "Superconductivity: phenomena, applications and computational studies" (/E) ***** ON CAMPUS IN SG312 ***** 41 14.10. TR - Tuuva Kastinen: "Investigation of polymer materials via molecular modeling" (F/E) ***** Zoom ***** 43 28.10. JT - Jan Viljanen: “Laser plasma to save the climate” (E/E) ***** Zoom ***** 44 04.11. JT - Belquis Haider: "Multiplexed Super-Resolution Imaging – Design of deoxyribonucleic acid (DNA) oligonucleotides for multiplexed imaging on DNA origami nanostructures" (E/E) ***** Zoom ***** 45 11.11. TR - Mikko Karttunen: "Cell division, physics and mechanobiology: From Robert Hooke to radiation therapy" (/E) ***** Zoom ***** 46 18.11. TR - Terttu Hukka: "Tyhjiöstä liuokseen, ’ab initio’sta molekyylidynamiikkaan" (F/) ***** Zoom ***** 47 25.11. TR - Banhi Chatterjee: "Theoretical modeling of correlated electronic systems" (E/E) 48 02.12. TR - Reijo Kouhia: "Fatigue analysis / Väsymisanalysointi" (/E) ***** Zoom ***** 49 09.12. TS - John Dudley: "Unexpected connections in pure and applied research" (E/E) ***** Zoom ***** Abstract below 11.12. TR - Nobel-iltapäivä (http://iki.fi/trantala/popular/Nobel) (F/F) k. 2022 ------- 2 13.01. LL - Lasse Laurson: "Complex physical systems: From climate models to spin glasses" (E/E) ***** Zoom ***** 3 20.01. TR - Tapio Rantala: "Mitä fysiikka on / What physics is" ***** Zoom ***** 4 27.01. TR - Petri Pihko: "Reaktioihin vauhtia lisäravinnepurkeista – miten kemistit keksivät orgaaniset katalyytit" (/F) ***** Zoom ***** 5 03.02. TR - Stephen Plachta: "Quantum Advantage Using High-Dimensional Twisted Photons as Quantum Finite Automata" (E/E) ***** Zoom ***** 6 10.02. TR - Vesa Hytönen: "Ionikanavien muodonmuutokset mahdollistavat paineen ja kuuman aistimisen" (F/F) ***** Zoom ***** 7 17.02. TR - Maria Dimitrova: "Magnetically induced current density in molecules" (E/E) ***** Zoom ***** 8 24.02. TR - Janne Solanpää: "Adventures with Sports and Wellbeing Data" (E/E) ***** Zoom ***** 10 10.03. YT - Markus Hiekkamäki: "Spatial Modes and Single Photons" (E/E) ***** Zoom ***** 11 17.03. TR - Kalevi Kokko: "Optimization of interface structures in solids" (F/E) ***** Zoom ***** 12 24.03. TR - Antti Karttunen: "Studying thermal conductivity of semiconductors with quantum chemical methods" (E/E) ***** Zoom ***** 13 31.03. TR - Mikael Johansson: "Accelerating computational modeling with quantum computers" (E/E) ***** Zoom ***** 14 07.04. TR - Helge Lemmetyinen: "Photoinduced electron movements in well organized multilayered molecular films – from femtoseconds to seconds" (/E) ***** ON CAMPUS IN SG312 ***** 15 *** PÄÄSIÄISTAUKO / EASTER BREAK *** 16 21.04. ER - Esa Räsänen: "Physics of Rock Drumming: Science & Art of Being Slightly Off" (/E) ***** ON CAMPUS IN SG312 ***** 17 28.04. TR - Pekka Manninen: "Lumi, Europe's flagship supercomputer" (/E) ***** Zoom ***** Extra 5.5. ER - Riku Tuovinen: "A many-body approach to transport in quantum systems" (E/E) ***** ON CAMPUS IN SG312 ***** Seminar languages are indicated in parenthesis (talk/slides): (E/E), (F/E) or (F/F). - - - - - - - - - - ABSTRACTS - - - - - 16 21.04. Esa Räsänen: "Physics of Rock Drumming: Science & Art of Being Slightly Off" It has long been known that musicians do not keep time with the precision of a metronome. The human microtiming deviations from the exact beat typically range from a few milliseconds up to tens of milliseconds. Over time, these deviations are long-range correlated (LRC), i.e., they have a particular mathematical form that resembles a fractal [1]. Astonishingly, these LRC deviations make music sound distinctly human, so that they are preferred by listeners over uncorrelated white noise [2]. Therefore, LRC fluctuations in musical rhythms are not only a natural consequence of human playing, but they also characterize how rhythmic inaccuracies are tolerated or even enjoyed -- at least within a few-millisecond range. In musical samples, LRC's typically take place in a time scale beyond a bar or a few bars (musical phrase), whereas the shorter range is characterized by anticorrelations arising from the structuring of the drumbeat between bass, snare, and hi-hat [1,3]. Here we present our findings in microtiming deviations of rock drumming. We demonstrate the nature of rhythmic fluctuations with examples including Jeff Porcaro’s 16:th note 4/4 drumbeat [1] as well as his famous Rosanna shuffle [4]. We also discuss the relevance of our results as a subtle element behind musical "groove" -- among other elements such as rhythmic syncopation and musical communication in the band. Finally, we highlight the problems involved in the common "quantization" of drum tracks in the studio production. [1] E. Räsänen et al., PLoS ONE 10(6): e0127902 (2015). [2] H. Hennig et al., PLoS ONE 6(10): e26457 (2011); Phys. Today. 65, 64 (2012). [3] O. Pulkkinen and E. Räsänen, in preparation (2022). [4] N. Gullsten, B.Sc. Thesis, Tampere University (2022). - - - - - 10.02.2022 Vesa Hytönen: "Ionikanavien muodonmuutokset mahdollistavat paineen ja kuuman aistimisen" Lääketieteen nobel-palkinnon saivat tutkijat David Julius ja Ardem Patapoutian heidän työstään lämpöä ja kosketusta aistivien reseptorien parissa. Palkittavat selvittivät, mikä laittaa liikkeelle hermoimpulssit, joiden avulla havaitsemme lämpöä, kylmää ja mekaanisia ärsykkeitä. - - - - - 27.01.2022 Petri Pihko: "Reaktioihin vauhtia lisäravinnepurkeista – miten kemistit keksivät orgaaniset katalyytit" Tämän vuoden kemian Nobel-palkinnon saajat, Benjamin List ja David MacMillan, näyttivät vuonna 2000 koko maailmalle, että katalyyttien eli reaktiota nopeuttavien aineiden ei tarvitse olla kalliita tai monimutkaisia. Arvokkaita metalleja, kuten rodiumia, palladiumia tai kultaa ei välttämättä tarvita, vaan katalyytit voivat olla yksinkertaisia kuten luonnon aminohapot tai niistä tehdyt johdannaiset. - - - - - 13.01.2022 Lasse Laurson: "Complex physical systems: From climate models to spin glasses" Fysiikan Nobelin 2021 saivat Syukuro Manabe ja Klaus Hasselmann maapallon ilmakehän mallintamisesta, sekä Giorgio Parisi monimutkaisten fysikaalisten systeemien teorian kehittämisestä. Näiden tutkimusten ansiosta tiedämme, miten ilmakehän hiilidioksidipitoisuuden nousu johtaa maapallon pintalämpötilan nousuun, ja miten ilmaston kehitystä voidaan ennustaa pitkällä aikavälillä sään kaoottisuudesta huolimatta. Lisäksi meillä on käytössä teoreettisia työkaluja, joiden avulla voimme kuvata ja ymmärtää monimutkaisten systeemien käytöstä fysiikan lisäksi myös biologiassa, neurotieteessä ja koneoppimisessa. - - - - - 09.12.2021 John Dudley: "Unexpected connections in pure and applied research" There is currently intense international debate concerning optimal ways to manage interactions between fundamental and applied research. However, although there is sometimes a tendency to view this as a modern problem, the same issues have occurred frequently during the history of scientific development. This talk will review some particular examples from nonlinear science, discussing unappreciated aspects of research in nonlinear soliton physics, spanning the 19th century laying of the transatlantic cable, the Manhattan Project, the 2005 and 2009 Nobel Prizes in physics, the latest techniques in medical diagnostics and the detection of extra-solar planets. We will also see how these developments are leading to dramatic developments in nonlinear optics and fundamental advances in the understanding of nonlinear light - matter interactions, new approaches for ultrafast laser design, and leading to some surprising applications in other fields of physics. The talk will consider technical aspects of wave propagation and nonlinear photonics, but will be sprinkled with historical anecdotes and thus will be suitable for a general audience. - - - - - 11.11.2021 Mikko Karttunen: "Cell division, physics and mechanobiology: From Robert Hooke to radiation therapy" In this talk, I will discuss the physics of cell motility and division. This will be approached from a historical viewpoint that starts from Robert Hooke of Hooke's law and ends to how the physical principles can be used in modeling radiation therapy in combating cancer. There's also a relation to the famous Kardar-Parisi-Zhang equation for growth of interfaces. - - - - - TR - Markku Räsänen: "Molecular processes at low temperatures: selective infrared conformer control and reactivity of noble-gases" - - - - -