{"id":19,"date":"2020-02-04T16:41:35","date_gmt":"2020-02-04T07:41:35","guid":{"rendered":"http:\/\/www-p.cc.ocha.ac.jp\/okumura-phys\/?page_id=19"},"modified":"2026-04-21T20:06:56","modified_gmt":"2026-04-21T11:06:56","slug":"presentations","status":"publish","type":"page","link":"https:\/\/www-p.sci.ocha.ac.jp\/okumura-phys\/japanese\/%e8%ac%9b%e6%bc%94\/presentations.html","title":{"rendered":"Presentations"},"content":{"rendered":"

2026<\/h2>\n
\n

Oral Talk, Ko Okumura
\nA renormalization group analysis of the axisymmetric bubble breakup inspired by recent non-axisymmetric studies
\nStatistical and Nonlinear Physics I
\nAPS March Meeting 2026, Denver, CO, and online, March 15\u201320, 2026.<\/p>\n

2025<\/h2>\n
\n

Group Seminar<\/strong> (E Rio), Ko Okumura
\nOn the bubble breakup in confined geometries
\nLaboratoire de Physique des Solides, Orsay, France, July 28, 2025<\/p>\n<\/div>\n

Group Seminar<\/strong> (A Daerr), Ko Okumura
\nOn the bubble breakup in confined geometries
\nMSC, Universit\u00e9 Paris Cit\u00e9, Paris, France, July 28, 2025<\/p>\n

Group Seminar<\/strong> (D Vella), Ko Okumura
\nOn the bubble breakup in confined geometries
\nUniversity of Oxford, Oxford, UK, July 24, 2025<\/p>\n

Group Seminar<\/strong> (D van der Meer, Physics of Fluid), Ko Okumura
\nOn the bubble breakup in confined geometries
\nUniversity of Twente, Twente, Netherlands, July 21, 2025<\/p>\n

Selected Oral<\/strong>, Ko Okumura
\nA hydrodynamic analog of critical phenomena: renormalization group analysis of interfacial dynamics
\nThe 29th International Conference of Statistical Physics (STATPHYS29)
\nJuly 13-18, 2025, Palazzo dei Congressi & Palaffari, Florece, Italy<\/p>\n

Selected Oral<\/strong>, Ko Okumura, Shyoko Ii, and Ikumi Yoshino
\nA hydrodynamic analog of critical phenomena,
\nSoft and Liquid Matter Physics: Past, Present and Future (SLMP2025)
\nMarch 10-13, 2025, Insititute of Industrial Science, The University of Tokyo, Japan<\/p>\n

Poster, Haruka Hitomi and Ko Okumura
\nContinuous generation of confined bubbles:
\nviscous effect on the gravito-capillary pinch off
\nSoft and Liquid Matter Physics: Past, Present and Future (SLMP2025)
\nMarch 10-13, 2025, Insititute of Industrial Science, The University of Tokyo, Japan<\/p>\n<\/div>\n

2024<\/h2>\n
\n

Invited Lecture<\/strong>, Ko Okumura
\nA hydrodynamic analog of critical phenomena : an uncountably infinite number of universality classes,
\n8th International Soft Matter Conference (ISMC2024),
\nRaleigh Convention Center, USA, July 29-August 2(July 31), 2024<\/p>\n

Group Seminar<\/strong> (H Stone), Ko Okumura
\nWidely applicable scenario for explaining a quasi-scaling regime: viscous friction acting on a solid disk falling in confined fluid,
\nPrinceton University, Princeton, USA, July 26, 2024<\/p>\n

Group Seminar<\/strong> (J Morris), Ko Okumura
\nA hydrodynamic analog of critical phenomena : an uncountably infinite number of universality classes,
\nLevichi Institute, City College, CUNY, New York, USA, July 23, 2024<\/p>\n

Group Seminar<\/strong> (L Keiser), Ko Okumura
\nA hydrodynamic analog of critical phenomena : an uncountably infinite number of universality classes,
\nINPHYNI(Niece), France, June 21, 2024<\/p>\n

Keynote Talk<\/strong>, Ko Okumura
\nSimple understanding of bio-inspired problems: capillarity and material toughness,
\n10th International Conference on Bio-inspiration,
\nHotel St Paul, Nice (France), 19-21(20) June, 2024<\/p>\n

Group Seminar<\/strong> (JF Joanny), Ko Okumura
\nA hydrodynamic analog of critical phenomena : an uncountably infinite number of universality classes, Institute Curie (Paris), France, June 18, 2024<\/p>\n

Group Seminar<\/strong> (Bico, Romain & Rayssat), Ko Okumura
\nA hydrodynamic analog of critical phenomena : an uncountably infinite number of universality classes, PMMH, ESPCI(Paris), France, June 14, 2024<\/p>\n

Invited Talk<\/strong>, Ko Okumura
\nContinuity and Discontinuity in the In-Plane to Out-of-Plane Transition of Kirigami- from a view point of physicists -,
\nMini-Symposium: \u201cStability and dynamics of structures,\u201d
\nThe 3rd International Conference on Nonlinear Solid Mechanics,
\nComplesso di via Corte d’Appello, Cagliari (Italy), June 11-14(11), 2024<\/p>\n

Selected Oral Talk<\/b>, Hiroki Yasuga*, Ko Okumura, Yusuke Takei (*:presenter)
\nELECTRO-“WICKING” INTO DIELECTRIC-COATED MICROSTRUCTURES
\nSession XIb – Microfluidics Technologies
\nthe 37th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2024), January, 21\u201325, 2024, Austin, Texas, USA.<\/p>\n

2023<\/h2>\n
\n

Requested Plenary Talk<\/b>, Ko Okumura
\nSimple views on daily physics
\nProfessor Session 2, 14th Ewha-JWU-Ochanomizu Joint Symposium 2023,
\nDecember 15(Fri)-17(Sun), 2023, Mejiro Campus Japan Women’s University, Tokyo, Japan<\/p>\n<\/div>\n

Oral Talk, Yui Takai
\nHigh-Velocity Drag Friction acting on an obstacle in a quasi two-dimensional granular bed
\nS4-02-Phys, 14th Ewha-JWU-Ochanomizu Joint Symposium 2023,
\nDecember 15(Fri)-17(Sun), 2023, Mejiro Campus Japan Women’s University, Tokyo, Japan<\/p>\n

Oral Talk, Nana Tanaka and Ko Okumura* (*: speaker)
\nViscous friction acting on a solid disk falling in confined fluid: lessons for the scaling analysis,
\nThe 76th Annual Meeting of the Division of Fluid Dynamics, Walter E.Washington Convention Center, Washington DC, November 19-21, 2023<\/p>\n

Selected Oral Talk<\/b>, Nana Tanaka and Ko Okumura* (*: speaker)
\nWidely applicable scenario for explaining a quasi-scaling regime:\u00a0viscous friction acting on a solid disk falling in confined fluid,
\nThe\u00a07th\u00a0International\u00a0Soft\u00a0Matter\u00a0Conference (ISMC 2023), Osaka\u00a0International\u00a0Convention\u00a0Center,\u00a0Osaka,\u00a0Japan,\u00a0September\u00a04\u20128,\u00a02023<\/p>\n

Selected Oral Talk<\/b>, Nana Tanaka and Ko Okumura* (*: speaker)
\nWidely applicable scenario for explaining a quasi-scaling regime:\u00a0viscous friction acting on a solid disk falling in confined fluid,
\n28th International Conference on Statistical Physics (Statphys 28),\u00a0The University of Tokyo, Hongo campus, Tokyo, Japan,\u00a0August 7-11, 2023<\/p>\n

Keynote Talk, <\/b>Ko Okumura
\nSimple understanding of bio-inspired problems: capillarity and material toughness,
\n8th N.I.C.E. International Rendez-vous on Bio-Inspiration,
\nNice, France, 20-22 June, 2023 (in person and virtual)<\/p>\n<\/div>\n

Oral Talk, Hiroki Yasuga*, and Ko Okumura (*:presenter)
\nScaling crossover in a viscous regime of capillary replacement between two mutually immiscible liquids in an open channel
\nSession V: Fluids II PP04:8:
\nAPS March Meeting 2023, Las Vegas, March 20\u201322, 2023 (Online).<\/p>\n

2022<\/h2>\n

Oral Talk, Haipeng Zhang, Ko Okumura and Sangjin Ryu,Does the growing liquid bridge of drops coalescing in a Hele-Shaw cell feel the no-slip wall?
\n75th Annual Meeting of the APS Division of Fluid Dynamics (APS DFD 2022), November 20-22, Indianapolis, USA.<\/p>\n

Oral Talk, Yukina M Koga*, and Ko Okumura (*:presenter)
\nInertial coalescence of a liquid drop surrounded by viscous liquid
\nSession F11: Drops I
\nAPS March Meeting 2022, Chicago, IL, USA, March 14\u201318, 2022. (Online)<\/p>\n

Oral Talk, Hiroki Yasuga*, and Ko Okumura (*:presenter)
\nDynamics of capillary replacement between two mutually immiscible liquids on an open channel
\nSession A11: Thin Films Surface Flows and Interfaces I
\nAPS March Meeting 2022, Chicago, IL, USA, March 14\u201318, 2022. (Online)<\/p>\n

2021<\/h2>\n

lnvited Lecture<\/b>, Ko Okumura
\nCritical phenomena and scaling: from bubble breakup to kirigami mechanics
\nStat&QuantPhys Autumn School 2021 (SQP2021), online, September 27-28, 2021<\/p>\n

lnvited Talk<\/b>, Ko Okumura
\nVelocity jump in crack propagation on sheet samples: nano-scale glass transition\u00a0 and boundary condition
\nPolymer Connect, Barcelona+online, July 5-7, 2021<\/p>\n

Selected Oral<\/b>, Ko Okumura
\nHow universal is the vibration-velocity controlled granular convection?
\nPowders & Grains 2021, Buenos Aires+online, July 5, 13, 21, 29 and Aug 6, 2021<\/p>\n

Selected Oral<\/b>, Ko Okumura
\nVarious scaling regimes for drag friction at low Reynolds numbers
\nBiofluid Symposium, Online, July 21-24, 2021<\/p>\n

Oral Talk, Haipeng Zhang*, Ko Okumura and Sangjin Ryu (*:presenter)
\nConfinement Effects on Drop Coalescence: An Experimental Study Using Hele-Shaw Cell
\nSession T17: Drops: Coalescence; 74th Annual Meeting of the APS Division of Fluid Dynamics, November 21\u201323, 2021; Phoenix Convention Center, Phoenix, Arizona<\/p>\n

Oral Talk, Ko Okumura
\nRising and breakup of air in viscous fluids in confined geometries
\nSession J24: Thin Films, APS March Meeting, March 15-19 (online), 2021.<\/p>\n

Oral Talk, Mika Umehara and Ko Okumura
\nBrazil nut effect controlled by vibration velocity
\nSession V16: Packing and Jamming of Granular Materials, APS March Meeting, March 15-19 (online), 2021.<\/p>\n

Oral Talk, Yuka Miyabe and Ko Okumura
\nBreakup of a thin air film surrounded by viscous liquid : derivation of self-similar solution
\nSession J24: Thin Films, APS March Meeting, March 15-19 (online), 2021.<\/p>\n

Oral Talk, Yukina M. Koga and Ko Okumura
\nQuasi-two-dimentional coalescence of liquid in another liquid
\nSession B24: Drops I, APS March Meeting, March 15-19 (online), 2021.<\/p>\n

Oral Talk, Hiroki Yasuga and Ko Okumura
\nCapillary replacement between two mutually immiscible liquids on an open channel
\nSession E24: Granular, Porous Media, and Multiphase Flows I, APS March Meeting, March 15-19 (online), 2021.<\/p>\n

2019<\/h2>\n

lnvited Talk<\/b>, Ko Okumura
\nVelocity jump in crack propagation on sheet samples: nano-scale glass transition at a crack tip and the effect of boundary condition
\nMaterials Research Meeting 2019
\nYokohama Symposia
\nDecember 10-14, 2019<\/p>\n

Poster, Yukina M. Koga and Ko Okumura
\nQuasi-two-dimensional coalescence of liquid in another liquid
\nMaterials Research Meeting 2019
\nYokohama Symposia
\nDecember 10-14, 2019<\/p>\n

2018<\/h2>\n

Selected Oral Talk<\/b>, Ko Okumura
\nBubble bursting and air-film pinch-off in confined space: scaling and self-similarity
\nLiquids @ Interfaces 2018 University of Bourdeux, Bourdeaux (France)
\nOctober 22-25, 2018<\/p>\n

Seminar,<\/b>\u00a0Ko Okumura
\nSimple views on some viscous dynamics of drops and bubbles in confined space
\nSeminar as part of the Oxford Fluids Network, Oxford University, Oxford, UK, August 31, 2018.
\n
\nDiscussion Leader<\/b>, Ko Okumura, Grains and Interfaces
\nPoster, Ko Okumura, Granular flow in confined geometries: jamming, clogging, and instability
\nThe Interdisciplinary Nature of Particulate Systems
\nGranular Matter, Gordon Research Conference
\nStonehill College, Massachusetts, USA,
\nJuly 22-27, 2018<\/b><\/p>\n

Selected Oral Talk, Ko Okumura
\nSimple modelling of biological and artificial composites consisting of soft and hard elements: from nacre, spider-web, to Kirigami
\n10th European Solid Mechanics Conference (ESMC10) Bologna, Italy July 2-6, 2018<\/p>\n

Selected Oral Talk<\/b>, Ko Okumura
\n\u201cGranular flow in confined geometries: jamming, clogging, and instability\u201d
\n10th European Solid Mechanics Conference (ESMC10), Bologna (Italy), July 2-6, 2018.<\/b><\/p>\n

Selected Oral Talk, Ko Okumura
\nDynamics of drops and bubbles in confined space
\n16th Conference of the International Association of Colloid and Interface Scientists (IACIS)
\nRotterdam, the Netherlands, 21 \u2013 25 May, 2018<\/p>\n

Selected Oral Talk<\/b>, Y. Morishita, K. Tsunoda, K. Urayama, A. Kubo, Y. Umeno, N. Sakumichi, Y. Aoyanagi, and\u00a0K. Okumura*<\/b>\u00a0(*: presenter),
\nEmergent frontiers of the fixed-grip constant crack propagation in polymer sheets: experimental, numerical, and theoretical studies
\n17th international conference on Deformation, Yield and Fracture of Polymers (DYFP) 2018, Rolduc, Abbey, Kerkrade, NL., March 25-29, 2018<\/p>\n

28th The Materials Research Society of Japan
\nKitakyushu International Conference Center, Fukuoka, Japan, December 18-20, 2018
\nF-9:Design and Characterization of Tough Polymers (International Session)
\n\u7b2c28\u56de\u65e5\u672cMRS\u5e74\u6b21\u5927\u4f1a F-9 : \u30bf\u30d5\u30dd\u30ea\u30de\u30fc\u306e\u8a2d\u8a08\u3068\u305d\u306e\u7279\u6027\u89e3\u6790
\n\u5317\u4e5d\u5dde\u56fd\u969b\u4f1a\u8b70\u5834\u3001\u897f\u65e5\u672c\u7dcf\u5408\u5c55\u793a\u5834\u30012018\u5e7412\u670818\u65e5\uff5e20\u65e5
\nPoster, Yuko Aoyanagi and Ko Okumura
\nNumerical simulation of crack propagation in a two-dimensional viscoelastic network
\nPoster, Midori Isobe and Ko Okumura
\nMechanical response of kirigami sheet materials
\n\u300c\u5207\u308a\u7d19\u69cb\u9020\u30b7\u30fc\u30c8\u306e\u529b\u5b66\u5fdc\u7b54\u300d<\/p>\n

Poster, Ko Okumura
\nSimple views on drag friction, jamming, film bursting, topological transition, and kirigami
\nTGM 3rd Edwards Symposium – New Horizons in Soft Matter, Centre for Mathematical Sciences, Cambridge, UK, September 5 – 7, 2018.<\/p>\n

17th international conference on Deformation, Yield and Fracture of Polymers (DYFP) 2018, Rolduc, Abbey, Kerkrade, NL., March 25-29, 2018
\n1. Poster, Naoyuki Sakumichi and Ko Okumura,
\nExactly solvable model for a velocity jump observed in crack propagation in viscoelastic solids,
\n2. Poster, Yuko Aoyanagi and Ko Okumura,
\nCrack propagation in two-dimensional nonlinear viscoelastic network,
\n3. Poster, Midori Isobe and Ko Okumura,
\nMechanical response of kirigami sheet materials
\nDutch Polymer Institute (DPI) bestowed the third poster prize with a premium on Midori Isobe on March 28!<\/b><\/span><\/p>\n

APS March Meeting 2018, Los Angeles, California, USA, March 5-9, 2018.
\n1. Oral Presentation, Ko Okumura
\nGranular flow in confined geometries: jamming, clogging, and instability
\n2. Oral Presentation, Midori Isobe and Ko Okumura,
\nMechanical response of kirigami sheet materials<\/p>\n

2017<\/h2>\n

Selected Oral Talk<\/b>, Ko Okumura
\nScaling Views on the Strength and Toughness of Bio-Composites Consisting of Soft and Hard Elements
\nThe 2017 MRS Fall Meeting
\nHynes Convention Center and Sheraton Boston Hotel in Boston, Massachusetts, USA, November 26-December 1, 2017<\/p>\n

Keynote Lecture<\/b>, Ko Okumura
\nSimple modeling of toughness and strength of polymer-based biological and industrial materials
\n2017 Japan-Taiwan Bilateral Symposium on Physical Chemistry of Tough Polymers for Future Vehicles
\nNational Cheng Kung University, Taiwan
\nNovember 20-21, 2017<\/b><\/p>\n

Invited Talk, Ko Okumura
\nSimple modeling of biological composites, kirigami, and viscoelastic crack propagation
\nMini-symposium: “Material Modelling”
\nSimulation for Additive Manufacturing (ECCOMAS Thematic Conference)
\nMunich, Germany, 11th-13th October 2017<\/p>\n

Invited Talk<\/b>, Ko Okumura
\nGranular flow in confined geometries: jamming, clogging, and instability
\nInvited Session: “Micro-macro: From Discrete Particles to Continuum Models of Granular Mechanics”
\nThe V International Conference on Particle-Based Methods (Particles 2017; ECCOMAS Thematic Conference)
\nHannover, Germany, 26\u201328th September 2017<\/p>\n

Invited Talk<\/b>, Ko Okumura
\nSimple Views on the Toughness and Strength of Polymer-Based Biological and Industrial Materials, GSS-ImPACT JOINT SYMPOSIUM on Advanced Soft Matter: From Single Molecule to Tough Polymers, Hokkaido University, Hokkaido, Japan, August 7-8, 2017.<\/p>\n

Selected Oral Talk<\/b>, Ko Okumura
\nDynamics of drops and bubbles in a confined space
\nDROPLETS 2017, UCLA, Los Angeles, CA, USA, JULY 24-26, 2017<\/p>\n

Invited Talk<\/b>, Ko Okumura
\nSimple models and scaling arguments for understanding miscellaneous problems in soft matter physics
\nJSPS A3 Workshop on soft matter
\nTOKYO ELECTRON House of Creativity, Tohoku Univ., Sendai, Japan, January 18-20, 2017<\/p>\n

Poster, Midori Isobe and Ko Okumura
\nMechanical response of kirigami sheet materials
\n2017 Japan-Taiwan Bilateral Symposium on Physical Chemistry of Tough Polymers for Future Vehicles
\nNational Cheng Kung University, Taiwan November 20-21, 2017<\/p>\n

Poster, Naoyuki Sakumichi and Ko Okumura
\nExactly solvable model for a velocity jump observed in crack propagation in viscoelastic solids
\n2017 Japan-Taiwan Bilateral Symposium on Physical Chemistry of Tough Polymers for Future Vehicles
\nNational Cheng Kung University, Taiwan November 20-21, 2017<\/p>\n

Poster, Yuko Aoyanagi and Ko Okumura
\nCrack propagation in a two dimensional nonlinear viscoelastic network
\n2017 Japan-Taiwan Bilateral Symposium on Physical Chemistry of Tough Polymers for Future Vehicles
\nNational Cheng Kung University, Taiwan November 20-21, 2017<\/p>\n

Oral Presentation, Mayuko Murano and Ko Okumura
\nRising dynamics of a bubble confined in vertical cells with rectangular cross-sections
\n70th Annual Meeting of the APS Division of Fluid Dynamics
\nSunday\u2013Tuesday, November 19\u201321, 2017; Denver, Colorado<\/p>\n

Requested Talk<\/b>, Yuko Aoyanagi and Ko Okumura
\nReduction mechanism for the maximum stress at crack tip in nacre-like layered structures
\n14th International symposium on biomineralization, Tsukuba (Japan), October9-13, 2017.<\/p>\n

Poster, Mayuko Murano and Ko Okumura
\nBursting Dynamics of Viscous Film without Circular Symmetry: The Effect of Confinement, GSS-ImPACT JOINT SYMPOSIUM, Hokkaido University, Hokkaido, Japan, August 7-8, 2017.<\/p>\n

Poster, Midori Isobe and Ko Okumura
\nMechanical response of kirigami sheet materials,
\nGSS-ImPACT JOINT SYMPOSIUM, Hokkaido University, Hokkaido, Japan, August 7-8, 2017.<\/p>\n

Oral Presentation, Yuko Aoyanagi and Ko Okumura
\nMechanical nonlinearity in the soft layers of Nacre
\nAPS March Meeting 2017, New Orleans, LA, March 13-17, 2017<\/p>\n

Oral Presentation, Naoyuki Sakumichi and Ko Okumura
\nExactly solvable model for crack propagation in viscoelastic sheets: How to control a velocity jump leading to catastrophic failure
\nAPS March Meeting 2017, New Orleans, LA, March 13-17, 2017<\/p>\n

Poster, Atsushi Takei, Mayuko Murano, Marie Tani, Hiroyuki Fujita and Ko Okumura
\nThin film partially attached onto elastomer substrate for three-dimensional microstructure
\nThe 30th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2017), Las Vegas (USA), Jan. 22-26, 2017<\/p>\n

2016<\/h2>\n

Invited Talk<\/b>, Ko Okumura
\nScaling views on mechanical properties of porous materials from polymer foams to kirigami sheet materials
\nThe 15th European Mechanics of Materials Conference (EMMC15)
\nSeptember 7-9, 2016, Brussels, Belgium.<\/b><\/p>\n

Selected Plenary Talk, Ko Okumura
\nDynamics of drops and bubbles in a confined space
\nConference on Multiscale Applications of Surface Tension (MicroMAST\u20192016)
\nSeptember 5-8, 2016, Brussels, Belgium.<\/p>\n

Selected Oral Talk<\/b>, Ko Okumura
\nDynamics of drops and bubbles in a confined space
\nInternational Conference on Statistical Physics (STATPHYS26)
\n18-22 Jul 2016 Lyon (France)<\/p>\n

Invited Talk<\/b>, Ko Okumura
\nDynamics of fluid droplets in a confined space
\nEMN Meeting on Droplets (EMN Droplets 2016)
\nMay 9 to 13, 2016, San Sebastian, Spain<\/p>\n

Invited Talk<\/b>, Ko Okumura
\nJamming, bubbling and cavity collapse in granular materials
\nAvalanches, plasticity, and nonlinear response in nonequilibrium solids
\nKyoto March 7th \u2014 9th, 2016<\/p>\n

Poster, Marie Tani and Ko Okumura,
\nImbibition of Micro-Patterned Surface,
\nLIQUIDS @ INTERFACES, Pierre-Gilles de Gennes Institute (IPGG), 17-19 Oct. 2016, Paris, France<\/p>\n

Oral Presentation, Mayuko Murano, Natsuki Kimoto and Ko Okumura
\nBursting of a bubble confined in between two plates
\n69th Annual Meeting of the APS Division of Fluid Dynamics,
\nPortland, USA, 20-22 Nov. 2016<\/p>\n

Poster, Marie Tani and Ko Okumura,
\nImbibition of Micro-Patterned Surface,
\n1st International Conference on Multiscale Applications of Surface Tension, 5-8 Sep. 2016, Brussels, BELGUIM<\/p>\n

Poster, Marie Tani and Ko Okumura
\nImbibition of Micro-Patterned Surface
\nInternational Conference on Statistical Physics (STATPHYS26)
\n18-22 Jul 2016 Lyon (France)<\/p>\n

Poster, Yuko Aoyanagi, and Ko Okumura
\nCrack propagation in two-dimensional viscoelastic networks
\nInternational Conference on Statistical Physics (STATPHYS26)
\n18-22 Jul 2016 Lyon (France)<\/p>\n

Poster, Naoyuki Sakumichi and Ko Okumura
\nAn exactly solvable model for discontinuous transitions in the
\nvelocity of crack propagation in viscoelastic solids
\nInternational Conference on Statistical Physics (STATPHYS26)
\n18-22 Jul 2016 Lyon (France)<\/p>\n

Oral Presentation, Atsushi Takei and Ko Okumura
\nTearing Fracture of Polymer Foam Sheet
\nAPS March Meeting 2016
\nBaltimore, Maryland, March 14-18, 2016<\/p>\n

Poster, Naoyuki Sakumichi and Ko Okumura
\nHigh-velocity drag friction near the jamming point in two-dimensional granular materials
\nAvalanches, plasticity, and nonlinear response in nonequilibrium solids
\nYukawa Institute for Theoretical Physics, Kyoto University, March 7-9, 2016<\/p>\n

2015<\/h2>\n

Invited Talk<\/b>,Ko Okumura
\nWetting and toughness of fine and composite structures in biological materials(\u751f\u7269\u306b\u898b\u3089\u308c\u308b\u5fae\u7d30\u30fb\u8907\u5408\u69cb\u9020\u306e\u751f\u307f\u51fa\u3059\u6750\u6599\u7269\u6027:\u6fe1\u308c\u6027\u3068\u7834\u58ca\u976d\u6027\u306e\u89b3\u70b9\u304b\u3089)
\nSymposium: Future of biomimetics learning from natural history
\nThe 53rd Annual Meeting of the Biophysical Society of Japan, Kanazawa Univ., September 13-15, 2015, Japan<\/p>\n

Requested Talk<\/b>, Ko Okumura
\nSimple views on granular materials: jamming, bubbling, clogging, and meandering
\nEngineering Mechanics Institute Conference, Stanford University, June 16-19, 2015<\/b><\/p>\n

Invited Talk, Ko Okumura
\nSimple views on the dynamics of drops and bubbles in confined spaces,
\nEnergy Materials Nanotechnology Meeting on Droplets, Phuket, Thailand, May 8-11, 2015<\/p>\n

Seminar Talk<\/b>, Ko Okumura
\nGranular physics in two dimension: jamming, bubbling, clogging and meandering,
\nSeminars PMMH at ESPCI, Paris, March 27, 2015<\/p>\n

Selected Oral Talk<\/b>, Ko Okumura
\nSimple views on granular dynamics
\n\u2013 jamming, bubbling, clogging, and meandering \u2013
\nXIV International Workshop on Complex Systems, Fai della Paganella (Italy) March 22-25, 2015<\/p>\n

Selected Oral Talk<\/b>, Ko Okumura
\nSimple views on granular dynamics
\n\u2013 jamming, bubbling, clogging, and meandering \u2013
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter,
\nInstitute of Industrial Science, University of Tokyo, 16-18 March, 2015<\/p>\n

Oral Presentation, Marie Tani, Ryuji Kawano, Koki Kamiya and Ko Okumura
\nImbibition of “Open Capillary”: Fundamentals and Applications
\nhttp:\/\/meetings.aps.org\/Meeting\/DFD15\/Session\/D10.6
\n68th Annual Meeting of the APS Division of Fluid Dynamics, Boston, USA, 22-24 Nov. 2015<\/span><\/p>\n

Oral Presentation, Mayuko Murano, Natsuki Kimoto and Ko Okumura
\nBursting of a bubble confined in between two plates
\nhttp:\/\/meetings.aps.org\/Meeting\/DFD15\/Session\/R35.3
\n68th Annual Meeting of the APS Division of Fluid Dynamics, Boston,
\nUSA, 22-24 Nov. 2015<\/span><\/p>\n

Poster, Yuko Aoyanagi, and Ko Okumura
\nMechanical nonlinearity of soft layers in a stratified biocomposite optimized for strength
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter
\nInstitute of Industrial Science, University of Tokyo, March 16-18, 2015.<\/p>\n

Poster, Atsushi Takei, and Ko Okumura
\nCrack Growth Under Fixed Energy Release Rate
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter
\nInstitute of Industrial Science, University of Tokyo, March 16-18, 2015.<\/p>\n

Poster, Marie Tani and Ko Okumura
\nImbibition of Micro-patterned Surfaces
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter
\nInstitute of Industrial Science, University of Tokyo, March 16-18, 2015.<\/p>\n

Poster, Mayuko Murano, Natsuki Kimoto, and Ko Okumura
\nBursting of a bubble confined in between two plates
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter
\nInstitute of Industrial Science, University of Tokyo, March 16-18, 2015.<\/p>\n

Poster, Misato Yahashi and Ko Okumura
\nLiquid drops falling in a Hele-Shaw cell
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter
\nInstitute of Industrial Science, University of Tokyo, March 16-18, 2015.<\/p>\n

Poster, Yuki Yoshimura, Yui Yagisawa, and Ko Okumura
\nMeandering air flow in a granular bed
\nPhysics of Structural and Dynamical Hierarchy in Soft Matter
\nInstitute of Industrial Science, University of Tokyo, March16-17, 2015<\/p>\n

*Invited talks by our member<\/b><\/p>\n

Invited talk, Marie Tani
\n“Physical Approach to Capillary Rise on Legs of a Small Animal”
\nInternational Workshop on Bionic Engineering (IWBE2015), Beijing, China, 14-16 Oct. 2015<\/span><\/p>\n

2014<\/h2>\n

Invited Talk<\/b>, Ko Okumura
\nSimple Views on the Dynamics of Fluids in Confined space
\nand the Fracture of Soft Polymer Foams
\nNIMS Conference 2014 – A Strong Future from Soft Materials
\nTsukuba International Congress Center, July 1 – 3, 2014.<\/p>\n

Invited Talk<\/b>, Ko Okumura
\nSimple views on the dynamics of fluids in confined space<\/a>
\nWorkshop on Cross Correlation & Transport Phenomena in Soft Matter, Waseda University, Jan 27-28, 2014<\/p>\n

Invited Talk<\/b>,Ko Okumura
\nMEMS technology meets scaling laws for biology
\nSymposium: Beyond Biophysics!: Up-and-coming biophysical science achieved by physical, chemical and micromechanical control of a cell-sized space(Beyond Biophysics!: \u7d30\u80de\u30b9\u30b1\u30fc\u30eb\u306b\u304a\u3051\u308b\u7269\u7406\u30fb\u5316\u5b66\u30fb\u6a5f\u68b0\u7684\u306a\u5236\u5fa1\u304c\u751f\u307f\u51fa\u3059\u65b0\u305f\u306a\u751f\u7269\u7269\u7406\u5b66)
\nThe 52rd Annual Meeting of the Biophysical Society of Japan
\nSapporo Convention Center, September 25-27, 2014<\/p>\n

Selected Oral Talk<\/b>, Ko Okumura
\nSimple Views on the Strength and Toughness of Fusion Materials
\nThe 2nd International Symposium on Fusion Materials
\nTakeda Hall, The University of Tokyo, November 2 – 4, 2014.<\/p>\n

Poster (Best Poster Award<\/b>), Marie Tani, Ryuji Kawano, Koki Kamiya and Ko Okumura Imbibition of Micro-Patterned Surfaces The 2nd International Symposium on Fusion Materials Takeda Hall, The University of Tokyo, November 2 – 4, 2014.<\/p>\n

Selected Oral Talk<\/b>, Maria Yokota and Ko Okumura*
\nCoalescence and non-coalescence of a liquid droplet to a bath of the same liquid in a confined space under static electric field
\nCondensed Matter in Paris 2014, Universite Descartes, Paris, Aug 24-29, 2014<\/p>\n

Selected Oral Talk<\/b>, Yuki Kashima and Ko Okumura*
\nFracture of thin sheet of soft solidified foam: interplay of visco- and plasto-elasticity
\nCondensed Matter in Paris 2014, Universite Descartes, Paris, Aug 24-29, 2014<\/p>\n

Oral Talk, Yuka Takahara and Ko Okumura*
\nHigh-velocity drag friction in granular media near the jamming point
\nCondensed Matter in Paris 2014, Universite Descartes, Paris, Aug 24-29, 2014<\/p>\n

Selected poster, Yuka Takahara and Ko Okumura*
\nHigh-velocity drag friction in granular media near the jamming point
\nGordon Research Conferences: Granular & Granular-Fluid Flow, Stonehill College, USA, July 20-25, 2014<\/p>\n

Oral Presentation, Ko Okumura
\nSome scaling laws for fluid dynamics in a confined space<\/a>
\nAPS March Meeting 2014, Denver, USA, 3-7 March 2014<\/p>\n

Oral Presentation, Yuka Takehara and Ko Okumura
\nHigh-velocity drag friction in granular media near the jamming point<\/a>
\nAPS March Meeting 2014, Denver, USA, 3-7 March 2014<\/p>\n

Oral Presentation, Marie Tani, Daisuke Ishii, Shuto Ito, Takahiro Hariyama, Masatsugu Shimomura and Ko Okumura
\nImbibition dynamics on surfaces of legs of a small animal and on artificial surfaces mimicking them<\/a>
\nAPS March Meeting 2014, Denver, USA, 3-7 March 2014<\/p>\n

Poster (Refereed & Invited), Ko Okumura
\n“Simple views on the dynamics of fluids in confined space”
\nDynamics at Interfaces, OIST, Okinawa, JAPAN, 9-13 JUN 2014<\/p>\n

Poster (Refereed & Invited), Marie Tani, Daisuke Ishii, Shuto Ito, Takahiro Hariyama, Masatsugu Shimomura and Ko Okumura “Imbibition dynamics on surfaces of legs of a small animal and on artificial surfaces mimicking them”
\nDynamics at Interfaces, OIST, Okinawa, JAPAN, 9-13 JUN 2014<\/p>\n

Poster (Refereed & Invited), Mayuko Murano, Natsuki Kimoto and Ko Okumura “Bursting of a bubble confined in between two plates”
\nDynamics at Interfaces, OIST, Okinawa, JAPAN, 9-13 JUN 2014<\/p>\n

2013<\/h2>\n

Invited Talk<\/b>, Ko Okumura
\nScaling laws for wetting: dynamics of wicking, liquid drops and bubbles
\n2nd Soft-interfaces Mini-symposium 2013 (SIMS2013)
\n-Physical Chemistry and Characterization of Soft-interfaces-
\nMarch 13 (Wed)-15(Fri); Fukuoka, Japan<\/p>\n

Selected Oral<\/b>, Ko Okumura
\nSimple views on the dynamics of fluids in confined space
\nXXV IUPAP International Conference on Statistical Physics (STATPHYS25)
\n22-26 July, 2013, Seoul, Korea<\/p>\n

Invited talk<\/b>, Ko Okumura
\nStrength and Toughness of Helical Fusion Materials Inspired by the Exoskeleton of Lobsters
\n2nd Special Fusion Materials Meeting, in honor of the visit of Nico Sommerdijk & Fiona Meldrum
\nThe Univ. of Tokyo, 27-28 Oct 2013<\/p>\n

Invited talk<\/b>, Ko Okumura
\nScaling views on the strength of biocomposites
\nWorkshop on high-toughness materials (organized by RIKEN)
\nSeptember 4, 2013, Tokyo Univ. (Hongo)<\/p>\n

Seminar<\/b>, Ko Okumura,
\nScaling laws for wetting: dynamics of wicking, liquid drops and bubbles
\nProf. Ho-Young Kim’ group seminar
\nSeoul National University
\nJuly 24, 2013, Seoul, Korea<\/p>\n

*Oral Presentation, Yuka Takehara, Jennifer Rieser, Jerry Gollub, Douglas Durian
\nDynamics of failure in 2d granular packings
\nAPS March Meeting 2013, Baltimore, USA, 20 March 2013<\/p>\n

*Oral Presentation, Jennifer Rieser, Yuka Takehara, Wenbin Li, Ju Li, Jerry Gollub, Douglas Durian
\nCompression of granular pillars with constant width at top and bottom
\nAPS March Meeting 2013, Baltimore, USA, 22 March 2013<\/p>\n

* presentations by members of our group<\/p>\n

XXV IUPAP International Conference on Statistical Physics (STATPHYS25)
\n22-26 July, 2013, Seoul, Korea
\n(1) Poster, Maria Yokota and Ko Okumura
\nCoalescence of viscous drops in quasi two-dimensional space
\n(2) Poster, Yuka Takehara and Ko Okumura
\nHigh-velocity granular friction near the jamming point
\n(3) Poster, Marie Tani, Ko Okumura, Ryuji Kawano and Shoji Takeuchi
\nImbibition of Micro-patterned Surfaces<\/p>\n

2012<\/h2>\n

Invited Talk<\/b>, Ko Okumura,
\nSimple views on drops, bubbles and spider webs
\nThe 5th Series of WPI-AIMR Joint Seminar
\nWPI-AIMR, Tohoku Univ, June 29, 2012<\/p>\n

Seminar<\/b>, Ko Okumura,
\nSimple views on drops, bubbles and spider webs
\nProf. H. Caps’ group seminar
\nUniv. of Liege
\n5 April 2012, Liege, Belgium<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nSimple views on the mechanical adaptability of spider webs and the rupture dynamics of polymer thin films
\n2012 Conference on Deformation, Yield and Fracture in Polymers
\nRolduc Abbey in Kerkrade, NL, April 1-5, 2012<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nImpressionist approach to physics of wetting and material toughness
\n12th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n24 — 27 January 2012, Nagoya, Japan<\/p>\n

Oral presentation, Ko Okumura
\nSimple views on bioinspired materials: wetting and toughness
\nSpecial Fusion Materials Meeting, in honor of the visit of Joanna & Michael Aizenberg
\nThe Univ. of Tokyo, 8 Oct 2012<\/p>\n

Seminar<\/b>, Ko Okumura,
\nSimple views on drops, bubbles and spider webs
\nProf. L. Limat’s group seminar
\nLaboratoire Mati\u00e8re et Syst\u00e8mes Complexes
\nUniversite Paris VII (Paris Diderot)
\n23 Feb 2012, Paris, France<\/p>\n

Seminar<\/b>, Ko Okumura,
\nSimple views on drops, bubbles and spider webs
\nDOLFIN-II Science Team Meeting
\nESTEC, European Space Agency
\n20-21 Feb 2012, Noordwijk, Netherlands<\/p>\n

Oral Presentation, Ko Okumura,
\nScaling laws for the imbibition of textured surfaces comprising short pillars with rounded edges
\n65th Annual Meeting of the APS Division of Fluid Dynamics
\nNovember 18\u201320, 2012; San Diego, California<\/p>\n

Poster Presentation, Yokota Maria and Ko Okumura, Dimensional crossover in the viscous dynamics of coalescence of liquid drops confined in between two plates, “Soft Interfaces,” Ecole de Physique des Houches, July 2 – July 27 2012, Les Houches, France<\/p>\n

Poster Presentation, Yuka Takehara and Ko Okumura,
\nHigh-velocity drag friction in dense granular media
\nGordon Research Conference Granular & Granular-Fluid Flow Meeting
\nDavidson, NC, USA, 22-27 July 2012<\/p>\n

2011<\/h2>\n

Seminar<\/b>, Ko Okumura,
\nQuasi two-dimensional dynamics of drops and bubbles: drag friction, film bursting, and coalescence
\nLPS group seminar, Univ. Paris-Sud, Orsay (hosted by Prof. L. Leger)
\nDecember 16, 2011<\/p>\n

Seminar<\/b>, Ko Okumura,
\nDynamics of drops and bubbles in a confined space
\nINSP, University Paris 6 (hosted by Prof. S. Cohen-Addad)
\nDecember 12, 2011<\/p>\n

Seminar<\/b>, Ko Okumura,
\nSimple model of spider webs and scaling dynamics of drops and bubbles
\nCondensed Matter Seminar (hosted by Prof. Durian)
\nPennsylvania University, November 16, 2011<\/p>\n

Seminar<\/b>, Ko Okumura,
\nScaling dynamics of drops and bubbles and simple model of spider webs
\nWidely Applied Mathematics Seminar (hosted by Prof. Mahadevan)
\nHarvard University, November 15, 2011<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nCapability of Impressionist Physics in Materials Science: Liquid Drops, Spider Webs and Nacre
\nThe 1st International Symposium on Fusion Materials
\nToba, Aichi, Japan, October 16-18, 2011<\/b><\/p>\n

Invited Talk, Ko Okumura,
\nWetting on textured surfaces and dynamics of liquid drops and bubbles
\nThe 3rd Asian Symposium on Advanced Materials\u2013 Chemistry & Physics of Functional Materials \u2013 (ASAM-3),
\nFukuoka, Japan, September 19 — 22, 2011<\/p>\n

Invited Lecture<\/b>, Ko Okumura,
\nToughening materials by combination of soft and hard elements: examples from nacre to spider webs
\nEUROMAT 2011 Congress, Montpellier, France September 12 — 15, 2011
\n
\nInstitute Colloquium<\/b>, Ko Okumura,
\nMechanical adaptability of spider webs and drag frictions in two dimensions
\nProf. S. Herminghaus gr., Max-Planck Institute, Goettingen, Germany, September 12, 2011<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nBubbles and drops, parabolic-flight experiments and other research interests
\nPolaDrop topical team meeting
\nMarch 8, 2011, ESA Headquarter, Paris<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nDrops and bubbles, spider webs, granular materials, and parabolic-flight experiments
\nFOAM-C instrument utilization meeting
\n17 — 18 February 2011, ESA Headquarter, Paris<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nWetting on artificial lotus surfaces
\n11th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n25 — 28 January 2011, Nagoya, Japan<\/p>\n

Oral, Maria Yokota and Ko Okumura,
\nDimensional crossover in the viscous dynamics of coalescence of liquid drops confined in between two plates
\n64nd Annual Meeting of the APS Division of Fluid Dynamics November 20\u201322, 2011; Baltimore, Maryland<\/p>\n

Oral, Yuka Takehara and Ko Okumura,
\nHigh-velocity drag friction in dense granular media
\n64nd Annual Meeting of the APS Division of Fluid Dynamics November 20\u201322, 2011; Baltimore, Maryland<\/p>\n

The 5th Mini-Symposium on Liquids (MSL2011)
\nPhysics and Chemistry of Soft Interfaces
\nJune 25, 2011, Okayama University
\n(1) Poster, Y. Aoyanagi and K. Okumura
\nSimple Model for Mechanics of Spider Webs
\n(2) Poster, A. Eri and K. Okumura
\nDynamics of drops and bubbles in a Hele-Shaw cell
\n(3) Poster, Y. Hamamoto and K. Okumura
\nAnalytical Studies on a Crack in Simplified Nacre Model
\n(4) Poster, N. Obara and K. Okumura
\nUniversal scaling law for the imbibition of textured surfaces with “soft” edges
\n(5) Poster, T. Sekiguchi, M. Tani and K. Okumura
\nExperimental study on the Brazil nut effect
\n(6) Poster, N. Takahashi and K. Okumura
\nOn the stress concentration in a simple elastic-plastic model
\n(7) Poster, Y. Takehara and K. Okumura
\nHigh-velocity drag friction in dense granular media
\n(8) Poster, M. Tani, T. Sekiguchi and K. Okumura
\nImbibition of inhomogeneous textured surfaces<\/p>\n

Poster, Y. Yoshitake and K. Okumura
\nContact angle hysteresis on rough and inhomogeneous surfaces
\n11th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n25 — 28 January 2011, Nagoya, Japan<\/p>\n

Poster, Y. Aoyanagi and K. Okumura
\n11th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n25 — 28 January 2011, Nagoya, Japan<\/p>\n

Poster, A. Eri and K. Okumura
\nBursting of a thin film in a confined geometry: Rimless and constant-velocity dewetting
\n11th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n25 — 28 January 2011, Nagoya, Japan<\/p>\n

Poster, M. Yokota and K. Okumura
\nCoalescence of a viscous drop confined in between two plates
\n11th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n25 — 28 January 2011, Nagoya, Japan<\/p>\n

Poster, Y. Hamamoto and K. Okumura
\nAnalytical Studies on a Crack in Layered Structures Mimicking Nacre
\n11th International Symposium on Biomimetic Materials Processing (BMMP-11)
\n25 — 28 January 2011, Nagoya, Japan<\/p>\n

2010<\/h2>\n

Invited Plenary Talk<\/b>, Ko Okumura,
\nToughness of soft-hard composites and Wetting on Textured Substrates
\nthe Spring annual meeting of the Materials Research Society \u2013 Korea (MRS-K)
\nMay 13-14(13) 2010, Palace Hotel in Samcheok City, Korea<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nFracture of Network Systems and Liquid Films on Textured Substrates
\n10th International Symposium on Biomimetic Materials Processing (BMMP-10)
\n26 — 29 (27) January 2010, Nagoya, Japan<\/p>\n

Seminar<\/b>, Ko Okumura
\nSimple views on fracture of familiar materials: sea shells, spider webs and plastic bags<\/a>
\nDecember 13, 2010, Institut Curie, Pairs<\/p>\n

Seminar<\/b>, Ko Okumura
\nDynamics of two-dimensional bubbles and drops and a simple scaling in nonlinear fracture<\/a>
\nDecember 17, 2010, PMMH, ESPCI, Pairs<\/p>\n

Seminar<\/b>, Ko Okumura
\nSpin coating on textured surfaces and nonlinear extension of the Griffith formula
\nFebruary 19, 2010, LPS group seminar, Univ. Paris-Sud, Orsay
\nhttp:\/\/www.lps.u-psud.fr\/spip.php?rubrique211&lang=fr<\/a><\/p>\n

Seminar<\/b>, Ko Okumura
\nSpin coating on textured surfaces and nonlinear extension of the Griffith formula
\nFebruary 17, 2010, Brochard’s group seminar, Institut Curie, Pairs<\/p>\n

Poster, A. Eri and K. Okumura
\nLifetime of a two-dimensional air bubble
\nInternational Soft Matter Conference 2010
\n5th-8th July 2010, Granada, Spain<\/p>\n

Poster, Y. Yoshitake and K. Okumura
\nEffect of Surface Roughness on Contact Angle Hysteresis
\n10th International Symposium on Biomimetic Materials Processing (BMMP-10)
\n26 — 29 (26) January 2010, Nagoya, Japan<\/p>\n

Poster, A. Eri and K. Okumura
\nRising and Setting of a Fluid Drop in a Hele-Shaw Cell
\n10th International Symposium on Biomimetic Materials Processing (BMMP-10)
\n26 — 29 (26) January 2010, Nagoya, Japan<\/p>\n

2009<\/h2>\n

Invited Talk<\/b>, Ko Okumura,
\nMathematical Modeling and Crack Solution to a Layered Structure Mimicking nacre; Griffith’s Failure Formula for Nonlinear Elastic-plastic Materials and its Implication for Structured Materials
\nthe European Congress and Exhibition on Advanced Materials and Processes,
\nSeptember 7 -10, 2009, Glasgow, UK.<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nImportance of soft-hard combination on nanoscale in tough biocomposites: Lessons from a layered structure mimicking nacre
\n9th International Symposium on Biomimetic Materials Processing(BMMP-9)
\n20 — 23 January 2009, Nagoya, Japan<\/p>\n

Seminar<\/b>, Ko Okumura,
\nDrag friction in two dimensional granular medium and on a moving liquid film and its instability on textured surfaces
\nNovember 16, 2009, LPMDI group seminar, Universit\u00e9 Paris-Est, Marene la Valle<\/p>\n

Seminar<\/b>, Ko Okumura,
\nWetting on textured surfaces
\nNovember 13, 2009, Prof. N. Vandewalle’s group seminar, Liege.<\/p>\n

Seminar<\/b>, Ko Okumura
\nDrag friction in two-dimensional polydisperse granular media
\nCofee seminar of PMMH,
\nNovember 5, 2009, ESPCI, Paris<\/p>\n

Seminar<\/b>, Ko Okumura,
\nRecent works on wetting possibly related to FOAM
\nFOAMs projects meeting
\nNovember 3, 2009, European Space Agence Headquarters, Paris<\/p>\n

Oral, Ko Okumura, Ayako Eri and Maria Yokota
\nDynamics of bubbles and drops in a Hele-Shaw cell
\n62nd Annual Meeting of the APS Division of Fluid Dynamics November 22\u201324, 2009; Minneapolis, Minnesota EH.00010<\/p>\n

Plenary oral plus poster, Ko Okumura
\nFate of two-dimensional bubbles and fracture of soft polymer foam solids
\nde Gennes Discussion Conference: From reptation to glassy materials: de Gennes pionneering work in rheology and recent developments, February, 2-5, 2009, Chamonix, France<\/p>\n

Poster, Yumiko Yoshitaka and Ko Okumura
\nOn the origin of contact angle hysteresis
\n<\/span>62nd Annual Meeting of the APS Division of Fluid Dynamics November 22\u201324, 2009; Minneapolis, Minnesota\u00a0L1.00025<\/span><\/p>\n

Plenary oral plus poster, Yumiko Yoshitake and Ko Okumura
\nOn the origin of contact angle hysteresis on textured surfaces
\nThe 3rd Mini-Symposium on Liquids (MSL2009)
\nPhysics and Chemistry of Soft Interfaces
\nJune 20, 2009, Okayama University<\/p>\n

Plenary oral plus poster, Ayako Eri and Ko Okumura
\nRising of a two-dimensional bubble
\nThe 3rd Mini-Symposium on Liquids (MSL2009)
\nPhysics and Chemistry of Soft Interfaces
\nJune 20, 2009, Okayama University<\/p>\n

Plenary oral plus poster, Maria Yokota and Ko Okumura
\nCoalescence of a two-dimensional liquid drop to a liquid bath
\nThe 3rd Mini-Symposium on Liquids (MSL2009)
\nPhysics and Chemistry of Soft Interfaces
\nJune 20, 2009, Okayama University<\/p>\n

Poster, Yumiko Yoshitake and Ko Okumura,
\nContact Angle Hysteresis on Textured Surfaces
\n9th International Symposium on Biomimetic Materials
\nProcessing(BMMP-9)
\n20 — 23 January 2009, Nagoya, Japan<\/p>\n

Poster, Ayako Eri and Ko Okumura,
\nLifetime of a Two-Dimensional Air Bubble
\n9th International Symposium on Biomimetic Materials
\nProcessing(BMMP-9)
\n20 — 23 January 2009, Nagoya, Japan<\/p>\n

2008<\/h2>\n

Invited Lecture<\/b>, Ko Okumura,
\nFracture of structured materials
\n— Impressionistic views on fracture of composites and polymer foam —
\n8th World Congress on Computational Mechanics
\n30 June to 5 July 2008, in Venice, Italy<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nWetting on rough surfaces
\nThe 17th World Interfinish Congress
\nJune 16-18, 2008 in Busan, Korea<\/p>\n

Invited Lecture<\/b>, Ko Okumura,
\nFracture of structured materials
\nECCOMAS Multidisciplinary Jubilee Symposium – New Computational Challenges in Materials, Structures, and Fluids
\nFebruary 18 to 20, 2008, in Vienna, Austria<\/p>\n

Invited Lecture<\/b>, Ko Okumura,
\nFracture of structured materials and wetting on rough surfaces
\n8th International Symposium on Biomimetic Materials
\nProcessing(BMMP-8)
\n21 — 24 January 2008, in Nagoya, Japan<\/p>\n

Seminar<\/b>, Ko Okumura
\nLifetime of a two-dimensional bubble, wetting on textured surfaces, and fracture of structured materials
\nProf. M. Adler’s gr.,\u00a0Laboratoire de Physique des Mat\u00e9riaux Divis\u00e9s et des Interfaces, Universit\u00e9 Paris – Est, Nobemver 21, 2008<\/p>\n

Seminar<\/b>, Ko Okumura
\nLifetime of a two-dimensional bubble, wetting on textured surfaces, and fracture of structured materials
\nProf. F. Brochard gr.,\u00a0 Institut Curie – Centre de Recherche, Paris, May 13, 2008\u00a0Web<\/a><\/p>\n

Seminar<\/b>, Ko Okumura
\nLifetime of a two-dimensional bubble, wetting on textured surfaces, and fracture of structured materials
\nProf. L. Leger gr.,\u00a0 Laboratoire de physique des solides, Orsay, May 19, 2008\u00a0Web<\/a>
\n
\nSeminar<\/b>, Ko Okumura
\nLifetime of a two-dimensional bubble, wetting on textured surfaces, and fracture of structured materials
\nProf. S. Dietrich gr., Max-Planck Institute, Stuttgart, Germany, February 22, 2008<\/p>\n

Seminar<\/b>, Ko Okumura
\nLifetime of a two-dimensional bubble, wetting on textured surfaces, and fracture of structured materials
\nProf. S. Herminghaus gr., Max-Planck Institute, Goettingen, Germany, February 23, 2008<\/p>\n

Poster,
\nYuko AOYANAGI and Ko OKUMURA
\nReinforcement of a material exploiting its internal structure
\nInternational Symposium on Non-Equilibrium Soft Matter<\/a>
\n2-5 June 2008, Kyoto, Japan<\/p>\n

Poster,
\nAyako ERI and Ko OKUMURA
\nLifetime of a two-dimensional air bubble
\nInternational Symposium on Non-Equilibrium Soft Matter<\/a>
\n2-5 June 2008, Kyoto, Japan<\/p>\n

Poster,
\nYuko AOYANAGI, Yumi Shiina and Ko OKUMURA
\nReinforcement of a material exploiting its internal structure
\nInternational Workshop on Bio-Soft Matter
\n9-10 June 2008, Tokyo, Japan<\/p>\n

Poster, Ayako ERI and Ko OKUMURA
\nLifetime of a two-dimensional air bubble
\nInternational Workshop on Bio-Soft Matter
\n9-10 June 2008, Tokyo, Japan<\/p>\n

2007<\/h2>\n

Invited Lecture<\/b>, Ko Okumura,
\nAnalytical solution of crack problems in nacre,
\n6th International Congress on Industrial and Applied Mathematics 2007″
\n(ICIAM 2007) in Zurich,
\nSwitzerland, July 16 — 20, 2007<\/p>\n

Invited Lecture<\/b>, Ko Okumura,
\nWetting on textured surfaces and fate of a two-dimensional bubble,
\nInternational mini-symposium on liquids<\/a>\u00a0(in honor of Prof. B. Widom)
\nMay 11, 2007, Okayama, Japan<\/p>\n

Invited Lecture<\/b>, Ko Okumura,
\nImpressionistic views on fracture of composites and polymer foam
\nInternational Conference on Polymer Processing (ICPP – 2007): May 18 – 20, 2007, Beijing, China
\nCANCELED<\/p>\n

Poster, Ko Okumura
\nFracture, wetting, and polymer statistics
\nStatphys 23, July 9-13, 2007, Genova, Italy<\/p>\n

Memorial talk<\/b>, Ko Okumura
\nMy memories of PGG (Pierre-Gilles de Gennes)
\nNew Frontiers in Colloidal Physics: A Bridge between Micro- and Macroscopic Concepts in Soft Matter
\nJuly 25-27, 2007, Kyodai Kaikan (Kyoto, Japan)<\/p>\n

Poster, Chieko Ishino and Ko Okumura
\nWetting transitions on textured surfaces
\nNew Frontiers in Colloidal Physics: A Bridge between Micro- and Macroscopic Concepts in Soft Matter
\nJuly 25-27, 2007, Kyodai Kaikan (Kyoto, Japan)<\/p>\n

Poster, Ayako Eri and Ko Okumura
\nFate of a two-dimensional bubble
\nNew Frontiers in Colloidal Physics: A Bridge between Micro- and Macroscopic Concepts in Soft Matter
\nJuly 25-27, 2007, Kyodai Kaikan (Kyoto, Japan)<\/p>\n

Poster, Yumi Shiina, Yukari Hamamoto and\u00a0Ko Okumura
\nFracture of soft cellular solids<\/u>
\nNew Frontiers in Colloidal Physics: A Bridge between Micro- and Macroscopic Concepts in Soft Matter
\nJuly 25-27, 2007, Kyodai Kaikan (Kyoto, Japan)<\/p>\n

\n
\n

Selected Oral, Mathilde Reyssat, Chieko Ishino, Etienne Reyssat, Ko Okumura and David Quere,\u00a0<\/span>Wicking within forests of micro-pillars, 60th Annual Meeting of the Divison of Fluid Dynamics, November 18\u201320, 2007; Salt Lake City, Utah<\/p>\n<\/div>\n<\/div>\n

2006<\/h2>\n

Invited Lecture<\/b>, Ko Okumura,
\nSCALING VIEWS ON STRENGTH OF SOFT\/HARD COMPOSITES,
\nIII European Conference
\non Computational Solid and Structural Mechanics
\nLisbon, Portugal, 5 – 8 June 2006<\/p>\n

Poster, Chieko Ishino and Ko Okumura
\nWetting transitions on textured surfaces
\nInternational Workshop on
\nRecent Advances in Soft Matter Physics
\nInstitute of Industrial Science, The University of Tokyo
\nAugust 21 – 23, 2006<\/p>\n

Poster, Kyoko KAWAI and Ko OKUMURA, Correlation of a polymer chain with the ends fixed
\nInternational Workshop on
\nRecent Advances in Soft Matter Physics
\nInstitute of Industrial Science, The University of Tokyo
\nAugust 21 – 23, 2006<\/p>\n

Poster, Ko OKUMURA
\nFracture of pearl’s layered structure, double network gel
\nand shock-absorbing foam
\nInternational Workshop on
\nRecent Advances in Soft Matter Physics
\nInstitute of Industrial Science, The University of Tokyo
\nAugust 21 – 23, 2006<\/p>\n

Poster, Ko Okumura,
\nFracture of pearl’s layered structure, double network gel and shock-absorbing foam
\nFrontiers in Dynamics: Physical and Biological Systems
\nUniv. Tokyo, 22 – 24 May 2006<\/p>\n

2005<\/h2>\n

Seminar<\/b>, Ko Okumura,
\nScaling views on toughness of composite materials,
\nProf. Gordon Williams gr., Imperial College, September, 2005<\/p>\n

Seminar<\/b>, Ko Okumura,
\nScaling views on toughness of composite materials,
\nProf. Julian V. F. Vincent gr., Univ. of Bath, September 26, 2005<\/p>\n

Selected Oral Talk<\/b>,\u00a0 Ko Okumura,
\nPhase transitions of liquid crystal systems,
\nInternational Liquid Crystal Elastomer Conference 2005,
\nCambridge Univ., September 21-24, 2005<\/p>\n

Seminar<\/b>, Ko Okumura,
\nWetting on rough surfaces,
\nProf. Julia Yeomans gr., Oxford Univ., September 20, 2005<\/p>\n

Keynote talk<\/b>, Ko Okumura,
\nFracture strength of biomimetic nano composite materials: a blend of soft and hard elements,
\nInternational Conference on Advances in Polymer Blends, Composites, IPNS and gels: Macro to Nano Scale, March 21-23, 2005 (Cochin, India).<\/p>\n

Invited Talk<\/b>, Ko Okumura,
\nTwo stories from soft matter physics in the biomimetic context : fracture strength of composite materials and wetting transitions on textured surfaces,
\nFifth International Symposium on Biomimetic Materials Processing, January 26-28, 2005 (Nagoya, Japan).<\/p>\n

2004<\/h2>\n

Invited talk<\/b>, Ko Okumura,
\nScaling Views on Toughness of Composite Materials,
\nSixth World Congress on Computational Mechanics, September 5-10, 2004 (Beijing, China).<\/p>\n

Selected oral talk<\/b>, Ko Okumura,
\nToughness and fracture of biomimetic composites,
\nInternational Workshop on Physics of Soft Matter Complexes, November 29-December 2, 2004 (Tokyo, Japan).<\/p>\n

Selected oral talk<\/b>, Ko Okumura,
\nToughness and fracture of gel composites
\nMACRO2004, 40th IUPAC World Polymer Congress, July 4-9, 2004 (Paris, France).<\/p>\n

Seminar<\/b>, K. Okumura,
\nWetting transitions on rough surfaces,
\nInformal discussions on problems related to wetting (Satellite meeting of International Workshop on Dynamics of Complex Fluids, March 11, 2004, Yukawa Institute, Kyoto University, Japan).<\/p>\n

Seminar<\/b>, K. Okumura,
\nRebounds of water drops and gel balls,
\nProf. Ajdari\u2019s group, LABORATOIRE DE PHYSICO-CHIMIE TH\u00c9ORIQUE, ENPCI (Paris, France), January 13, 2004<\/p>\n

Seminar<\/b>, K. Okumura,
\nToughness of composite materials: nacre-like biomimetic structure and double network gels,
\nSoft matter group seminar (Prof. Brochard-Wyart), Institut Curie (Paris, France), January 12, 2004.<\/a><\/p>\n

Seminar<\/b>, K. Okumura
\nWetting transitions on rough surfaces,
\nProf. de Gennes’ group seminar, College de France (Paris, France), January 9, 2004<\/p>\n

Poster, K. Okumura,
\nToughness of double network gels
\nInternational Workshop on Dynamics of Complex Fluids (March 8-10, 2004, Yukawa Institute, Kyoto University, Japan)<\/p>\n

Poster, C. Ishino, K. Okumura and D. Qu\u00e9r\u00e9
\nPhase diagram of wetting on rough surfaces
\nInternational Workshop on Dynamics of Complex Fluids, (March 8-10, 2004, Yukawa Institute, Kyoto University, Japan)<\/p>\n

Poster, N. Sato and K. Okumura
\nSystematic inclusion of correlation effects into the Maier-Saupe theory by the inversion method
\nInternational Workshop on Dynamics of Complex Fluids (March 8-10, 2004, Yukawa Institute, Kyoto University, Japan)<\/p>\n

Poster, C. Ishino, K. Okumura and D. Qu\u00e9r\u00e9
\nWetting transitions on rough surfaces
\nInternational Workshop on Physics of Soft Matter Complexes, November 29-December 2, 2004 (Tokyo, Japan).<\/p>\n

Poster, N. Sato and K. Okumura
\nSystematic inclusion of correlation effects into the Maier-Saupe theory by the inversion method
\nInternational Workshop on Physics of Soft Matter Complexes, November 29-December 2, 2004 (Tokyo, Japan).<\/p>\n

2003<\/h2>\n

Selected oral talk<\/b>, K. Okumura and P.-G. de Gennes,
\nPhase Transitions of Nematic Rubbers,
\nSlow Dynamics in Complex Systems (Institute of Fluid Science, Tohoku Univ., Nov. 3-8, 2003, Sendai, Japan)<\/p>\n

Selected oral talk<\/b>, K. Okumura,
\nFractures in biomimetic layered structures: elastic and viscoelastic viewpoints,
\nthe 1st International Congress on Bio-nanointerface (May19-24, 2003, Arcadia Ichigaya, Tokyo)<\/p>\n

Invited talk<\/b>, K. Okumura,
\nFractures in biomimetic layered structures,
\nWorkshop on Soft Matter Physics (March 10, 2003, Ochanomizu University, Tokyo).<\/p>\n

Seminar<\/b>, K. Okumura,
\nFractures in biomimetic layered structures,
\nSoft matter group seminar at CRPP (2003.2.3 , Bordeaux, France).<\/a><\/p>\n

Seminar<\/b>, K. Okumura,
\nFractures in biomimetic layered structures,
\nProf. J. Duran\u2019s group, University of Paris VI (2003.1.31 , Paris, France).<\/a><\/p>\n

Seminar<\/b>, K. Okumura,
\nFractures in biomimetic layered structures,
\nProf. de Gennes’ group seminar, College de France (2003.1.24 , Paris, France)<\/p>\n

Seminar<\/b>, K. Okumura,
\nRebounds of water drops and gel balls,
\nInstitute Curie (2003.2.19 , Paris, France).<\/a><\/p>\n

Pierre-Gilles de Gennes and Ko Okumura<\/span>,\u00a0\u201cPhase transitions of nematic rubbers,\u201d the 2nd France-Japan Workshop (Structure, deformation and stimuli response of polymer\u00a0 gels – Visco-elastic responsive materials : Theory, Experiments and Applications, 5 – 8 November 2003,\u00a0Centre de Recherche Paul Pascal, Pessac – France).<\/span><\/p>\n

Yoshimi Tanaka and Ko Okumura, \u201cImpact and deformation of gel balls,\u201d the 2nd France-Japan Workshop (Structure, deformation and stimuli response of polymer\u00a0 gels – Visco-elastic responsive materials : Theory, Experiments and Applications, 5 – 8 November 2003,\u00a0Centre de Recherche Paul Pascal, Pessac – France).<\/span><\/p>\n

Oral Talk, K. Okumura and P.-G. de Gennes
\nPhase Transitions of Nematic Rubbers
\nEnglish session of JPS meeting (Okayama, 20pZC-2).<\/p>\n

Oral talk, K. Okumura
\nRebounds of water drops and gel balls
\n1st International Symposium on New Developments of Integrated Sciences (Ochanomizu Univ., Tokyo).<\/p>\n

 <\/p>\n

Before 2003<\/span><\/b><\/h3>\n

Invited Talk<\/b>, K. Okumura,
\nPossibilities of Multi-dimensional Laser Spectroscopy and Two Stories from Soft Matter Physics, The 3rd Joint Forum of Ewha Womans Univ., Japan Women\u2019s Univ., and Ochanomizu Univ. and Research in Science for Women in the 21st Century (Nov. 8-10, 2001, Ochanomizu Univ., Tokyo).<\/p>\n

Invited Talk<\/b>, K. Okumura,
\nBrownian Theory of Nonlinear Raman Response of Liquid,
\nThe 61st Okazaki Conference on “Liquid Dynamics Studied by Time-Resolved Vibrational Spectroscopy” (Institute for Molecular Science, January 21-23, 1998).<\/p>\n

International group seminars before 2000<\/span><\/b><\/h3>\n

\u25a1 Prof. de Gennes’ group seminar, College de France (Paris).
\n\u25a1 Prof. Shaul Mukamel’s group, University of Rochester, a few times
\n\u25a1 Prof. Graham R. Fleming’s group, University of Chicago, twice
\n\u25a1 Prof. Charles A. Schmuttenmaer’s group, Yale University
\n\u25a1 Prof. B. Sakita’s, City College of City Univ. of New York
\n\u25a1 Prof. Peter Wolynes’ and Nancy Makri’s groups, Univ. of Illinois, Urbana-Champaign, twice
\n\u25a1 Prof. A. Leggett’s group, Univ. of Illinois, Urbana-Champaign<\/p>\n","protected":false},"excerpt":{"rendered":"

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