Matuttis Hans-Georg

機械知能システム学専攻教授
Ⅲ類(理工系)教授
先端工学基礎課程(夜間主課程)教授
国際教育センター教授

学位

  • Dr. rer. nat, University of Regensburg

研究分野

  • ものづくり技術(機械・電気電子・化学工学), 流体工学
  • 自然科学一般, 固体地球科学

経歴

  • 2021年04月
    電気通信大学 大学院情報理工学研究科, 教授
  • 2007年04月 - 2021年03月
    電気通信大学 大学院情報理工学研究科, 准教授

学歴

  • 1995年08月
    レゲンスブルグ大学物理学研究科, 物理学, 計算物理学, ドイツ連邦共和国
  • 1992年08月
    レゲンスブルグ大学物理学研究科, 物理学, 計算物理学専攻, ドイツ連邦共和国

論文

  • A force–displacement relation based on the JKR theory for DEM simulations of adhesive particles
    Jian Chen; Dominik Krengel; Daisuke Nishiura; Mikito Furuichi; Hans-Georg Matuttis
    Powder Technology, Elsevier BV, 427巻, 掲載ページ 118742-118742, 出版日 2023年09月
    研究論文(学術雑誌)
  • The Good, the Bad and the Ugly: droplet recognition by a “shootout”-heuristics
    Hans-Georg Matuttis; Silvia Holler; Federica Casiraghi; Johannes Josef Schneider; Alessia Faggian; Rudolf Marcel Füchslin; Martin Michael Hanczyc
    https://www.wivace2021.org, XV巻, 出版日 2021年09月17日, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Grid-algorithm improvements for dense suspensions of discrete element particles in finite element fluid simulations
    Jan Mueller; Akira Kyotani; Hans-Georg Matuttis
    Proceedings to Powders & Grains 2021, EPJ Web of Conferences, 249巻, 掲載ページ 09006-1-09006-4, 出版日 2021年, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Experimental study of particle shape dependence of avalanches inside a rotating drum
    Jian Chen; Dominik Krengel; Hans-Georg Matuttis
    Proceedings of Powders and Grains 2021, EPJ Web of Conferences, 249巻, 掲載ページ 06001-1-06001-1, 出版日 2021年, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Implementation of numerically exact Coulomb friction for discrete element simulations in three dimensions
    Shouta Sakamaki; Dominik Krengel; Jan Mueller; Jian Chen; Hans-Georg Matuttis
    Proceedings to Powders and Grains 2021, 249巻, 掲載ページ 14005-1-14005-2, 出版日 2021年, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Towards a Micromechanical Understanding of Landslides - Aiming at a Combination of Finite and Discrete Elements with Minimal Number of Degrees of Freedom
    Jan Mueller; Akira Kyotani; Hans-Georg Matuttis
    JAMP (Journal of applied Mathematics and Phyics), 87巻, 9号, 掲載ページ 1779-1798, 出版日 2020年09月, 査読付
    研究論文(学術雑誌), 英語
  • Some basic ideas on friction
    Dominik Krengel; Hans-Georg. Matuttis
    to appear in Environmental Geotechnics, Themed Issue: Thermodynamics in Material Modelling and Geotechnical Design, 掲載ページ 16 pages, 出版日 2019年
    研究論文(国際会議プロシーディングス), 英語
  • Implementation of Static Friction for Many-Body Problems in Two Dimensions
    Dominik Krengel; Hans-Georg Matuttis
    Journal of the Physical Society of Japan, 87巻, 掲載ページ 124402-1-124402-16, 出版日 2018年12月, 査読付
    研究論文(学術雑誌), 英語
  • Comparing numerically exact and modelled static friction
    Dominik Krengel; Hans-Georg Matuttis
    EPJ Web of Conferences, EDP Sciences, 140巻, 15020号, 掲載ページ 1-4, 出版日 2017年06月30日, 査読付, Currently there exists no mechanically consistent "numerically exact" implementation of static and dynamic Coulomb friction for general soft particle simulations with arbitrary contact situations in two or three dimension, but only along one dimension. We outline a differential-algebraic equation approach for a "numerically exact" computation of friction in two dimensions and compare its application to the Cundall-Strack model in some test cases.
    研究論文(国際会議プロシーディングス), 英語
  • Stress-Strain diagrams for non-convex particles
    Hans-Georg Matuttis; Masaki Nawa; Dominik Krengel
    EPJ Web of Conferences, EDP Sciences, 140巻, 掲載ページ 06005-1-06005-4, 出版日 2017年06月30日, 査読付, While most granular materials in nature and technology consist of non-convex particles, the majority of discrete element (DEM) codes are still only able to cope with convex particles, due to the complexity of the computational geometry and the occurrence of multiple contacts. We have reengineered a code for convex polygonal particles to model non-convex particles as rigidly connected clusters. Constricting non-convex particles along the symmetry axes by 30% leads to an increase of the materials strength of up to 50%.
    研究論文(国際会議プロシーディングス), 英語
  • The Effect of the Shape of Granular Particles on Density
    Dominik Krengel; Wei Shen Cheng; Jian Chen; Hans-Georg Matuttis
    Journal of the Physical Society of Japan, 84巻, 掲載ページ 67065-1-67065-5, 出版日 2015年05月, 査読付
    研究論文(学術雑誌), 英語
  • Synergies from using Higher Order Symplectic Decompositions Both for Ordinary Differential Equations and Quantum Monte Carlo Methods
    Hans-Georg Matuttis; Xiaoxing Wang
    PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014 (ICNAAM-2014), AMER INST PHYSICS, 1648巻, 掲載ページ 200002, 出版日 2015年, 査読付, Decomposition methods of the Suzuki-Trotter type of various orders have been derived in different fields. Applying them both to classical ordinary differential equations (ODEs) and quantum systems allows to judge their effectiveness and gives new insights for many body quantum mechanics where reference data are scarce. Further, based on data for 6x6 system we conclude that sampling with sign (minus-sign problem) is probably detrimental to the accuracy of fermionic simulations with determinant algorithms.
    研究論文(国際会議プロシーディングス), 英語
  • OPTIMIZATION AND OPENMP PARALLELIZATION OF A DISCRETE ELEMENT CODE FOR CONVEX POLYHEDRA ON MULTI-CORE MACHINES
    Jian Chen; Hans-Georg Matuttis
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C, WORLD SCIENTIFIC PUBL CO PTE LTD, 24巻, 2号, 掲載ページ 1350001 1-24, 出版日 2013年02月, 査読付, We report our experiences with the optimization and parallelization of a discrete element code for convex polyhedra on multi-core machines and introduce a novel variant of the sort-and-sweep neighborhood algorithm. While in theory the whole code in itself parallelizes ideally, in practice the results on different architectures with different compilers and performance measurement tools depend very much on the particle number and optimization of the code. After difficulties with the interpretation of the data for speedup and efficiency are overcome, respectable parallelization speedups could be obtained.
    研究論文(学術雑誌), 英語
  • Granular acoustics of polyhedral particles
    Wei Shen Cheng; Jian Chen; Hans-Georg Matuttis
    AIP Conference Proceedings, 1542巻, 掲載ページ 567-570, 出版日 2013年, 査読付, Our previous time-of-flight studies with two-dimensional polygonal simulations and one-and three-dimensional experiments showed that the sound-velocity in granular materials in one and two dimensions is of the order of 10% of that of the bulk material, while in three dimensions with spherical beads, it is only of the order of one percent. The conclusion was that the force network in three dimensions leads to a reduction of the sound velocity compared to two dimensions. With our newly completed fully three dimensional discrete element method with polyhedral particles, we investigate the relation between particle shape, size dispersion and sound velocity. The force-law is able to reproduce the sound velocity of the bulk material for space-filling particle packings. We find that the sound velocities in polyhedral assemblies are about 3% to 5% of the bulk sound velocities. This means that the influence of the particle geometry on the contact is significant. Aggregates with particles with many surfaces show higher sound velocities than those with sharp edges. Additionally, solitonic waves were observed which propagated in front of the sound-waves, but only in a relatively short range. © 2013 AIP Publishing LLC.
    研究論文(国際会議プロシーディングス), 英語
  • Polygonal Particles in Fluids
    Shi Han Ng; Hans-Georg Matuttis
    POWDERS AND GRAINS 2013, AMER INST PHYSICS, 1542巻, 掲載ページ 1138-1141, 出版日 2013年, 査読付, For arbitrary convex polygonal discrete elements in a fluid in two dimensions, we have implemented a stable microscopic simulation method, i.e. the flow goes around the particles, not through them, as in macroscopic simulations. The incompressible fluid is modeled via the differential algebraic equation formulation for finite elements, so that the pressures are Lagrange parameters of the underlying constraint system. Granular particles are modeled with of a core and a wider shadow around the core: The particle interaction is via the shadow, in which fluid flow is allowed, while the core is an impenetrable boundary for the fluid. The simulation works for arbitrary volume rations, so that both fluid flowing through a granular pore-space as well as particles sinking in a fluid can be simulated. We investigate the collapse of a granular step with and without fluid.
    研究論文(国際会議プロシーディングス), 英語
  • Effect of the surrounding fluid on the compaction of granular materials by tapping: Slow dynamics made slower?
    Shi Han Ng; Hans-Georg Matuttis
    4TH INTERNATIONAL SYMPOSIUM ON SLOW DYNAMICS IN COMPLEX SYSTEMS: KEEP GOING TOHOKU, AMER INST PHYSICS, 1518巻, 掲載ページ 372-378, 出版日 2013年, 査読付, We investigate compaction due to tapping in two-dimensional granular columns computationally with the discrete element method (DEM) in two dimensions. We compare the compaction in dry granulates with the compaction of the system immersed in a viscous fluid. We use polygons as particle shapes, so that the resulting pore-space can be triangulated for a finite element method (FEM) for an incompressible fluid. We investigate the competition between a slowing-down of the dynamics due to the viscous forces of the fluid and the improved transmission of the tapping pulses through the fluid in the pore space. For the system immersed in water, the propagation of the shocks due to the tapping of the floor is faster than in the corresponding dry system. The center of mass of a nearly square system drops faster for the dry case than for immersed particles. For a system twice as high and half as wide, for the same vibration, for the dry system, the center of mass rises, while for the immersed particles there is hardly any change.
    研究論文(国際会議プロシーディングス), 英語
  • Simulating Free Boundaries in 2D FEM Flow-Simulation with Direct Time Integration of the Surface Velocities
    Ng Shi Han; Hans-Georg Matuttis
    Journal of Algorithms & Computational Technology, 7巻, 3号, 掲載ページ 287-300, 出版日 2013年, 査読付
    研究論文(学術雑誌), 英語
  • Effect of the surrounding fluid on the compaction of granular materials by tapping: Slow dynamics made slower?
    Shi Han Ng; Hans-Georg Matuttis
    4TH INTERNATIONAL SYMPOSIUM ON SLOW DYNAMICS IN COMPLEX SYSTEMS: KEEP GOING TOHOKU, AMER INST PHYSICS, 1518巻, 掲載ページ 372-378, 出版日 2013年, We investigate compaction due to tapping in two-dimensional granular columns computationally with the discrete element method (DEM) in two dimensions. We compare the compaction in dry granulates with the compaction of the system immersed in a viscous fluid. We use polygons as particle shapes, so that the resulting pore-space can be triangulated for a finite element method (FEM) for an incompressible fluid. We investigate the competition between a slowing-down of the dynamics due to the viscous forces of the fluid and the improved transmission of the tapping pulses through the fluid in the pore space. For the system immersed in water, the propagation of the shocks due to the tapping of the floor is faster than in the corresponding dry system. The center of mass of a nearly square system drops faster for the dry case than for immersed particles. For a system twice as high and half as wide, for the same vibration, for the dry system, the center of mass rises, while for the immersed particles there is hardly any change.
    研究論文(国際会議プロシーディングス), 英語
  • The Fermionic Minus-Sign Problem for the Ground State, Revisited with Higher Order Suzuki–Trotter Decompositions
    Xiaoxing WANG; Hans-Georg MATUTTIS
    Journal of the Physical Society of Japan, PHYSICAL SOC JAPAN, 81巻, 10号, 掲載ページ 104002 1-17, 出版日 2012年10月, 査読付, A theorem by Yoshida which states that the discretization error for the Suzuki-Trotter (ST) decomposition is one order smaller than for the corresponding approximated Hamiltonian has long been overlooked with grave consequences for the accuracy of algorithms which use decomposition schemes. In our error analysis for the ground state energy of the Hubbard Hamiltonian by the projector quantum Monte Carlo method, we have used various orders of ST-decompositions, including for the first time in this field, pseudo-symplectic methods. We show that higher order does not necessarily imply better convergence, and identify the condition to obtain good convergence with higher order ST-decompositions. For the first order ST-decomposition, the ground state energy does not converge to the values for numerical diagonalization, in agreement with Yoshida's theorem, which may have caused confusion in connection with the "fermionic sign problem". We show how the use of the sign of the fermion determinant is in fact a reweighing method which for the ground state energy violates some basic Monte Carlo properties (the Gaussian distribution of observables), in contrast to sampling without sign. Whether sampling with or without the sign deviates less from the exact ground state energy depends on the system parameters (interaction, filling) and on the test wave function, so sampling with sign gives not necessarily better or more physical than sampling without sign, a result which can be supported by arguments on the error compensation. We discuss the implications for related methods.
    研究論文(学術雑誌), 英語
  • Study of quasi two dimensional granular heaps
    Jian Chen; Hans-Georg Matuttis
    Theoretical and Applied Mechanics Japan, 60巻, 掲載ページ 225-238, 出版日 2012年, 査読付
    研究論文(学術雑誌), 英語
  • Two-dimensional microscopic simulation of granular particles in fluid
    Shi Han Ng; Hans-Georg Matuttis
    Theoretical and Applied Mechanics Japan, 60巻, 掲載ページ 105-115, 出版日 2012年
    研究論文(学術雑誌), 英語
  • Adaptive Mesh Generation for Two-Dimensional Simulation of Polygonal Particles in Fluid
    Shi Han Ng; Hans-Georg Matuttis
    Theoretical and Applied Mechanics Japan, 59巻, 掲載ページ 323-333, 出版日 2011年, 査読付
    研究論文(学術雑誌), 英語
  • Numerical irreversibility in energy-conserving many particle systems
    Xiaoxing Wang; Hans-Georg Matuttis
    Theoretical and Applied Mechanics Japan, 59巻, 掲載ページ 309-321, 出版日 2011年, 査読付
    研究論文(学術雑誌), 英語
  • Discrete Element Simulation for Polyhedral Granular Particles
    Chen, J; Schinner, A; Matuttis, H.-G
    Theoretical and Applied Mechanics Japan, 59巻, 掲載ページ 335–346, 出版日 2011年, 査読付
    研究論文(学術雑誌), 英語
  • Static Friction, Differential Algebraic Systems and Numerical Stability
    Jian Chen; Alexander Schinner; Hans-Georg Matuttis
    COMPUTER SIMULATIONS STUDIES IN CONDENSED MATTER PHYSICS XXI - PROCEEDINGS OF THE 21ST WORKSHOP, ELSEVIER SCIENCE BV, 6巻, 掲載ページ 65-75, 出版日 2010年, We show how Differential Algebraic Systems (Ordinary Differential Equations with algebraic constraints) in mechanics are affected by stability issues and we implement Lubich's projection method to reduce the error to practically zero. Then, we explain how the "numerically exact" implementation for static friction by Differential Algebraic Systems can be stabilized. We conclude by comparing the corresponding steps in the "Contact mechanics" introduced by Moreau. (C) 2010 Published by Elsevier Ltd.
    研究論文(国際会議プロシーディングス), 英語
  • Static Friction, Differential Algebraic Systems and Numerical Stability
    Jian Chen; Alexander Schinner; Hans-Georg Matuttis
    COMPUTER SIMULATIONS STUDIES IN CONDENSED MATTER PHYSICS XXI - PROCEEDINGS OF THE 21ST WORKSHOP, ELSEVIER SCIENCE BV, 6巻, 掲載ページ 65-75, 出版日 2010年, We show how Differential Algebraic Systems (Ordinary Differential Equations with algebraic constraints) in mechanics are affected by stability issues and we implement Lubich's projection method to reduce the error to practically zero. Then, we explain how the "numerically exact" implementation for static friction by Differential Algebraic Systems can be stabilized. We conclude by comparing the corresponding steps in the "Contact mechanics" introduced by Moreau. (C) 2010 Published by Elsevier Ltd.
    研究論文(国際会議プロシーディングス), 英語
  • Jian Chen, Lisa Watanabe, Hans-Georg Matuttis¤ and Hide Sakaguchi
    History Dependence of the; Density Distribution in; Granular Heaps
    Powders & Grains 2009, 1巻, 出版日 2009年07月
    研究論文(国際会議プロシーディングス), 英語
  • History Dependence Of The Density Distribution On Granular Heaps
    Jian Chen; Lisa Watanabe; Hans-Georg Matuttis; Hide Sakaguchi
    POWDERS AND GRAINS 2009, AMER INST PHYSICS, 1145巻, 掲載ページ 199-+, 出版日 2009年, 査読付, In previous computational work by one of the authors, the pressure minimum under heaps was shown to result from the construction history. In this work we will show that the construction history is actually embedded in the average density of the granular material.
    研究論文(国際会議プロシーディングス), 英語
  • Simulation Of Polygonal Grains In A Finite-Element-Fluid
    Yuuske Sakai; Jian Chen; Hans-Georg Matuttis
    POWDERS AND GRAINS 2009, AMER INST PHYSICS, 1145巻, 掲載ページ 1019-1022, 出版日 2009年, 査読付, While many phenomena in granular materials can be treated with "dry" grains, in some applications the surrounding fluid plays a role. We show how a Discrete Element code with polygonal particles (to take into account shape effects from roughness and elongation) can be combined with a Finite-Element method of an incompressible Navier Stokes fluid.
    研究論文(国際会議プロシーディングス), 英語
  • Random-walk type model with fat tails for financial markets
    Hans-Geors Matuttis
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C, WORLD SCIENTIFIC PUBL CO PTE LTD, 19巻, 7号, 掲載ページ 1017-1026, 出版日 2008年07月, Starting from the random-walk model, practices of financial markers are included into the random-walk so that fat tail distributions like those in the high frequency data of the SP500 index are reproduced, though the individual mechanisms are modeled by normally distributed date. The incorporation of local correlation narrows the distribution for "frequent" events, whereas global correlations due to technical analysis leads to fat tails. Delay of market transactions in the trading process shifts the fat tail probabilities dowmwards. Such an inclusion of reactions to market fluctuations leads to mini-trends which are distributed with unit variance.
    研究論文(学術雑誌), 英語
  • Acoustic of sound propagation in granular materials in one, two, and three dimensions
    Salah A. M. El Shourbagy; Shiro Okeda; Hans-Georg Matuttis
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, PHYSICAL SOC JAPAN, 77巻, 3号, 掲載ページ 034606-1-034606-15, 出版日 2008年03月, We investigate the sound velocity of assemblies of granular particles. Computationally, we investigate regular polygons with various corner numbers in two dimensions with the discrete element method and compare the results for large corner numbers with experiments on soft air-gun beads. The sound velocity for one-dimensional granular chains of spherical particles is about one order of magnitude less than the sound velocity of the bulk material, both in the simulation as well as in the experiment. For two-dimensional simulations, the results are comparable to that for one-dimensional chains, but vary with the packing. For the experiments in three dimensions, we find that the sound velocity is two orders of magnitude less than that of the bulk, or one order of magnitude less than that for one- or two-dimensional systems. This result is consistent with the group velocity reported by Liu and Nagel, but well below their reported "sound velocity". The latter was in all likelihood not a linear (amplitude-independent) sound wave but one for which the sound-velocity was already affected by non-linear effects, as we elaborate on experimental, theoretical and computational considerations.
    研究論文(学術雑誌), 英語
  • Numerical Solution of Ordinary Differential Equations for Modeling in Socio-Econo-Physics
    H.-G. Matuttis; J. Chen
    Lectures on Socio- and Econophysics, 1巻, 1号, 出版日 2007年09月, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Simulation of the dependence of the Bulk-Stress-Strain Relations of Granular Materials on the Particle Shape
    Salah A. M. El Shourbagy; Shinichi Morita; Hans-Georg Matuttis
    Journal of the physical society of Japan, 75巻, 10号, 掲載ページ 104602-1 - 104602-10, 出版日 2006年08月
    研究論文(学術雑誌), 英語
  • Strategies for an optimized simulation of granular particles in a Newtonian Fluid, Part 1: Basics
    H.-G. Matuttis
    京都大学数理解析研究所講究緑 複雑流体の数理とその応用, 京都大学, 1472巻, 掲載ページ 11-20, 出版日 2006年02月
    研究論文(大学,研究機関等紀要), 英語
  • Strategies for an optimized simulation of granular particles in a Newtonian Fluid, Part 2: Numerical algorithms
    I. Tabakov; H.-G. Matuttis; T. Suzuki
    複雑流体の数理とその応用 京都大学数理解析研究所講究緑, 京都大学, 1472巻, 掲載ページ 21-30, 出版日 2006年02月
    研究論文(大学,研究機関等紀要), 英語
  • 複雑粒体中における音響伝播の異方性
    板橋洋平; H.-G. Matuttis
    第19回数値流体力学シンポジウム学会論文誌, 掲載ページ 189, 出版日 2005年12月
    研究論文(大学,研究機関等紀要), 日本語
  • 複雑流体としての粉粒体:3次元相互作用のモデリングの提唱
    諏訪光太; H.-G. Matuttis
    第19回数値流体力学シンポジウム学会論文誌, 掲載ページ 91, 出版日 2005年12月
    研究論文(大学,研究機関等紀要), 英語
  • 二次元粉粒体中における応力伝播の測定
    板橋洋平; H.-G. Matuttis
    Proceedings of 2005 Annual Meeting , Japan Society of Fluid Mechanics ( NAGARE Additional Volume), 日本流体力学会, 24巻, 掲載ページ 40-40, 出版日 2005年09月, Many Models have been proposed for the Stress-Propagation in Granular Materials, which all assume a "universal" behaviour independent of external parameters. Measurements (by Behringer et. al) up to now had been inconclusive. We present experimental results where we can show that the characteristics of the stress propagation in granular materials is not "universal" but depends on the fubric and ordering in the granular packing.
    研究論文(大学,研究機関等紀要), 日本語
  • 次元および2次元における粉粒体中の音響伝播シミュレーション
    Salah El Shourbagy; H.-G. Matuttis
    Proceedings of 2005 Annual Meeting , Japan Society of Fluid Mechanics ( NAGARE Additional Volume), 24巻, 掲載ページ 309, 出版日 2005年09月
    研究論文(大学,研究機関等紀要), 英語
  • Multicanonical simulations of the tails of the order-parameter distribution of the two-dimensional Ising model
    R Hilfer; B Biswal; HG Mattutis; W Janke
    COMPUTER PHYSICS COMMUNICATIONS, ELSEVIER SCIENCE BV, 169巻, 1-3号, 掲載ページ 230-233, 出版日 2005年07月, 査読付, We report multicanonical Monte Carlo simulations of the tails of the order-parameter distribution of the two-dimensional Ising model for fixed boundary conditions. Clear numerical evidence for "fat" stretched exponential tails is found below the critical temperature, indicating the possible presence of fat tails at the critical temperature. (c) 2005 Elsevier B.V. All rights reserved.
    研究論文(学術雑誌), 英語
  • Nonexistence of d-wave-superconductivity in the quantum Monte Carlo simulation of the Hubbard model
    HG Matuttis; N Ito
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C, WORLD SCIENTIFIC PUBL CO PTE LTD, 16巻, 6号, 掲載ページ 857-866, 出版日 2005年06月, For the existence of d-wave-superconductivity in the Hubbard model, previous quantum Monte Carlo results by other authors, which showed a power law increase of the d-wave susceptibility, seem to contradict a recently published theorem. We show those quantum Monte Carlo calculations were numerically contaminated, analyze the numerical problem and propose a numerically more stable computing scheme.
    研究論文(学術雑誌), 英語
  • Structure formation in a binary monolayer of dipolar particles
    Varga, I; H Yamada; F Kun; HG Matuttis; N Ito
    PHYSICAL REVIEW E, AMER PHYSICAL SOC, 71巻, 5号, 掲載ページ 051405(1-7), 出版日 2005年05月, 査読付, We propose an experimental technique for an easy to control realization of a binary dipolar monolayer where the two components have oppositely oriented dipole moments constrained perpendicular to the plane of motion without the application of an external field. The experimental setup ensures that hydrodynamic effects do not play a crucial role in the structure formation, the particles move deterministically due to the dipole-dipole interaction. At low concentrations, cluster-cluster aggregation occurs with chainlike morphologies, while at high concentration the particles self-assemble into various types of binary crystal lattices, in good agreement with the theoretical predictions. The structures formed by the particles are found to be sensitive to external perturbations due to the central interparticle forces, however, static friction arising at the contact surface of particles can increase the stability compared to systems with only viscous friction.
    研究論文(学術雑誌), 英語
  • Simple stochastic modeling for fat tails in financial markets
    H.-G. Matuttis
    rd Nikkei Econophysics Symposium 2005, Ed. H. Takayasu, "Practical Fruits of Econophysics", 掲載ページ 178-182, 出版日 2005年, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Angle of repose for two-dimensional particle aggregates from particle-size and -shape
    Salah A. M. El Shourbagy; Hans-Georg Matuttis
    Proceedings of the 5th international conference "Powders&Grains 2005", ed. Ramon Garcia-Roji, Hans J. Herrmann, Sean McNamara, 掲載ページ 1289-1293, 出版日 2005年, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Shape segregation in granular materials: A game of Go where shape beats size and buoyancy
    Hans-Georg Matuttis; Seiji Omata; Osamu Sano
    Proceedings of the 5th international conference "Powders&Grains 2005", ed. Ramon Garcia-Roji, Hans J. Herrmann, Sean McNamara, 掲載ページ 1349-1353, 出版日 2005年, 査読付
    研究論文(国際会議プロシーディングス), 英語
  • Density and size segregation in deposits of pyroclastic flow
    NK Mitani; HG Matuttis; T Kadono
    GEOPHYSICAL RESEARCH LETTERS, AMER GEOPHYSICAL UNION, 31巻, 15号, 出版日 2004年08月, The main portion in the deposits of pyroclastic flow shows various characteristic features such as density and size segregation of large fragments in the vertical direction. To understand the mechanism which produces these features, we numerically study granular flows on an inclined rough surface with impurities that are different in density and size from the matrix particles. The simulation shows the occurrence of density and size segregation of large impurities, and the impurities finally concentrate at the top and the bottom. Based on these results, we discuss the mechanism of the segregation. It is found that the behavior of impurities is governed by gravity, buoyancy and the viscosity of the randomly moving matrix.
    研究論文(学術雑誌), 英語
  • Numerical implementation of Coulomb Friction in Mechanical Systems
    Salah A. M. El Shourbagy; H.-G. Matuttis
    物性研究, 物性研究刊行会, 81巻, 6号, 掲載ページ 876-879, 出版日 2004年03月
    英語
  • Vibration-induced compaction in elongated vessels
    Hans-Georg Matuttis; Takumi Kinouchi; Hide Sakaguchi
    Mathematical Aspects of Complex Fluids IV, RIMS Kokyoroku series, 1413巻, 出版日 2004年02月
  • Multicanonical Monte Carlo study and analysis of tails for the order-parameter distribution of the two-dimensional Ising model
    R Hilfer; B Biswal; HG Mattutis; W Janke
    PHYSICAL REVIEW E, AMER PHYSICAL SOC, 68巻, 4号, 出版日 2003年10月, The tails of the critical order-parameter distribution of the two-dimensional Ising model are investigated through extensive multicanonical Monte Carlo simulations. Results for fixed boundary conditions are reported here, and compared with known results for periodic boundary conditions. Clear numerical evidence for "fat" stretched exponential tails exists below the critical temperature, indicating the possible presence of fat tails at the critical temperature. Our work suggests that the true order-parameter distribution at the critical temperature must be considered to be unknown at present.
    研究論文(学術雑誌), 英語
  • Modeling Friction in Granular Materials
    H.-G. Matuttis; A. Schinner
    物性研究, 43巻, 2号, 出版日 2003年07月
    研究論文(学術雑誌)
  • Non-equilibrium analysis of the antiferromagnetic ordering in the half-filled Hubbard model in two dimensions
    H.-G. Matuttis; N. Ito
    物性研究, 物性研究刊行会, 79巻, 5号, 掲載ページ 822-845, 出版日 2003年
    英語
  • Shape segregation for bidisperse mixtures of ellipses in two dimensions
    HG Matuttis; N Ito; H Watanabe
    TRAFFIC AND GRANULAR FLOW'01, SPRINGER-VERLAG BERLIN, 掲載ページ 455-460, 出版日 2003年, Whereas size segregation is a fairly common phenomenon in granular material research, up to now shape segregation was has not been observed. We present simulations of bidisperse shaped (elliptic and round) granular particle systems which exhibit a demixing of round and elongated particles. The effect is not only controlled by the particle elongation, but also by the Coulomb friction coefficient in the system.
    研究論文(国際会議プロシーディングス), 英語
  • Outline for a simulation method for volcanic eruptions using DEM
    K. Kagami; N. K. Mitani; N. Ito; T. Koyaguchi
    火山爆発のダイナミックス、文部科学省科学研究費特定領域研究, 422巻, 出版日 2003年
    英語
  • Effect of particle shape on bulk-stress-strain relations of granular materials
    I. Nobuyasu; A. Schinner; H.-G. Matuttis
    複雑流体の数理II,数理解析研究講究, 京都大学, 1305巻, 掲載ページ 89-99, 出版日 2003年
    英語
  • Quantum computing simulation using the auxiliary field decomposition
    K Fischer; HG Matuttis; S Yukawa; N Ito
    COMPUTER SIMULATION STUDIES IN CONDENSED-MATTER PHYSCIS XVI, SPRINGER-VERLAG BERLIN, 95巻, 掲載ページ 79-85, 出版日 2003年
    研究論文(国際会議プロシーディングス), 英語
  • Auxiliary field methods for the simulation of quantum computation circuits
    HG Matuttis; K Fischer; N Ito; M Ishikawa
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C, WORLD SCIENTIFIC PUBL CO PTE LTD, 13巻, 7号, 掲載ページ 917-929, 出版日 2002年09月, One obstacle in the simulation of quantum circuits is the high dimension of the Hilbert space. Using auxiliary field decompositions known from many-particle simulation, we can transform the mathematical description of the quantum circuit into a combination low-dimensional product states which can be sampled using Monte Carlo techniques. We demonstrate the method using Simon's algorithm for the detection of the period of a function.
    研究論文(学術雑誌), 英語
  • Quantum-statistical simulations for quantum circuits
    K Fischer; HG Matuttis; N Ito; M Ishikawa
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C, WORLD SCIENTIFIC PUBL CO PTE LTD, 13巻, 7号, 掲載ページ 931-945, 出版日 2002年09月, Using a Hubbard-Stratonovich like decomposition technique, we implemented simulations for the quantum circuits of Simon's algorithm for the detection of the periodicity of a function and Shor's algorithm for the factoring of prime numbers on a classical computer. Our approach has the advantage that the dimension of the problem does not grow exponentially with the number of qubits.
    研究論文(学術雑誌), 英語
  • Advances in the investigation of the minus sign problem for the fermionic case
    HG Matuttis; N Ito
    COMPUTER SIMULATION STUDIES IN CONDENSED-MATTER PHYSICS XIV, SPRINGER-VERLAG BERLIN, 89巻, 掲載ページ 194-199, 出版日 2002年, Recent results in the investigation of the quantum Monte Carlo method for the Hubbard model using auxiliary fields revealed that the minus-sign problem for the fermionic case may be much more benign than conclusions in earlier studies indicated.
    研究論文(国際会議プロシーディングス), 英語
  • Particle simulation of cohesive granular materials
    HG Matuttis; A Schinner
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C, WORLD SCIENTIFIC PUBL CO PTE LTD, 12巻, 7号, 掲載ページ 1011-1021, 出版日 2001年09月, We present two-dimensional molecular dynamics simulations of cohesive regular polygonal particles. The cohesive part of the force-law for the particle-particle interaction is validated by the agreement with existing experimental data. We investigate microscopic parameters, which axe not accessible to experiments such as contact length, raggedness of the surface and correlation time. With increasing cohesion, the particles move in clusters for long times.
    研究論文(学術雑誌), 英語
  • Some findings on the minus-sign problem for the Hubbard model in the projector quantum Monte Carlo method
    HG Matuttis; N Ito
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, PHYSICAL SOC JAPAN, 70巻, 6号, 掲載ページ 1519-1522, 出版日 2001年06月, The quantum Monte Carlo method for the Hubbard model using the Hubbard-Stratonovich transformation is reexamined. It is observed that the value of the ground state energy for a 3 x 2 and 4 x 4 system is estimated correctly by ignoring the minus-sign of the negative sampling weight appearing in the simulation using the projector method. It is also observed that the average of sign is positive and the correlation between the energy and the sign is weak for these systems. The reasons why the ground state energy is estimated correctly is given on a phenomenological base.
    研究論文(学術雑誌), 英語
  • Rotational dynamics of magnetic particles in suspensions
    C Scherer; HG Matuttis
    PHYSICAL REVIEW E, AMER PHYSICAL SOC, 63巻, 1号, 出版日 2001年01月, An approach for the rotational dynamics of magnetic particles and their magnetic moments, in fluid suspensions, is developed. A possible application is to magnetic resonance in ferrofluids. Based on a generalized Lagrangian formulation for the equations of motion of the particle, we introduce its interaction with the solvent fluid via dissipative and random noise torques, as well as the interaction between the particle and its magnetic moment, treated as an independent physical entity and characterized by three generalized coordinates: its two polar angles and its modulus. In the appropriate limits, it reduces to the cases of superparamagnetic particles or nonsuperparamagnetic (blocked magnetic moments) particles. It is also indicated how the dynamic complex susceptibility may be calculated from the equations of motion, and as an example the effect of the particles inertia on the susceptibility is numerically evaluated for some arbitrary values of the parameters.
    研究論文(学術雑誌), 英語
  • Fractal space, cosmic strings and spontaneous symmetry breaking
    J Argyris; C Ciubotariu; HG Matuttis
    CHAOS SOLITONS & FRACTALS, PERGAMON-ELSEVIER SCIENCE LTD, 12巻, 1号, 掲載ページ 1-48, 出版日 2001年01月, The present paper is conceived within the framework of El Naschie's fractal-Cantorian program and proposes to develop a model of the fractal properties of spacetime. We show that, starting from the most fundamental level of elementary particles and rising up to the largest scale structure of the Universe, the fractal signature of spacetime is imprinted onto matter and fields via the common concept for all scales emanating from the physical spacetime vacuum fluctuations. The fractal structure of matter, field and spacetime (i.e. the nature and the Universe) possesses a universal character and can encompass also the well-known geometric structures of spacetime as Riemannian curvature and torsion and includes also, deviations from Newtonian or Einsteinian gravity (e.g. the Rossler conjecture). The leitmotiv of the paper is generated by cosmic strings as a fractal evidence of cosmic structures which are directly related to physical properties of a vacuum slate of matter (VSM). We present also some physical aspects of a spontaneous breaking of symmetry and the Higgs mechanism in their relation with cosmic string phenomenology. Superconducting cosmic strings and the presence of cosmic inhomogeneities can induce to cosmic Josephson junctions (weak links) along a cosmic string or in connection with a cosmic string (self) interactions and thus some intermittency routes to a cosmic chaos can be explored. The key aspect of fractals in physics and of fractal geometry is to understand why nature gives rise to Fractal structures. Our present answer is: because a fractal structure is a manifestation of the universality of self-organisation processes, as a result of a sequence of spontaneous symmetry breaking (SSB). Our conclusion is that it is very difficult to prescribe a certain type of fractal within an empty spacetime. Possibly, a random fractal (like a Brownian motion) characterises the structure of free space. The presence of matter will decide the concrete form of fractalisation. But, what does it mean the presence of matter? Can there exist a spacetime without matter or matter without spacetime? Possibly not, but consider on the other hand a space far removed from usual matter, or a space containing isolated small particles in which a very low density matter can exist. Very low density matter might be influenced by a fractal structure of space, for example in the sense that it is subject also to fluctuations structured by random fractals. Diffraction and diffusion experiments in an empty space and very low density matter could provide evidence of a fractal structure of space. However, at very high (Planck) densities, and a spacetime in which fluctuations represent also the source of matter and fields (which is very resonable within the context of a quantum gravity), we can assert that Einstein's dream of geometrising physics and El Naschie's hope to prove the fractalisation (or Cantorisation) of spacetime are fully realised. (C) 2000 Elsevier Science Ltd. All rights reserved.
    研究論文(学術雑誌), 英語
  • History-dependent structure in granular piles
    A Schinner; HG Mattutis; T Akiyama; J Aoki; S Takahashi; KM Aoki; K Kassner
    POWDERS AND GRAINS 2001, A A BALKEMA PUBLISHERS, 掲載ページ 499-502, 出版日 2001年, The pressure distribution under heaps has found to be dependent on the building history of the heap both in experiments and in simulations. Up to now, theoretical models and analysis assume that the packing of the heap is homogeneous. We show new experimental and simulational results which indicate that the packing is inhomogeneous and that this packing property is likely causing the pressure minimum under the heap.
    研究論文(国際会議プロシーディングス), 英語
  • Vectorizable overlap computation for ellipse-based discrete element method
    HG Matuttis; N Ito; H Watanabe; KM Aoki
    POWDERS AND GRAINS 2001, A A BALKEMA PUBLISHERS, 掲載ページ 173-176, 出版日 2001年, Ellipse shaped particles offer a wider variety of modellization for granular materials and complex fluids. Nevertheless, the contact and intersection detection for ellipses on the computer is a complicated task. Direct implementations of analytic approaches are not simple because the problem is numerically ill-conditioned. This article gives a new algorithm which allows a data-parallel computation of the ellipse intersection points for many-body simulations.
    研究論文(国際会議プロシーディングス), 英語
  • Behandlung des Schotters als Vielkoerpersystem mit wechselnden Bindungen
    Holger Kruse; Karl Popp; Hans-Georg Matuttis; Alexander Schinner
    Der Eisenbahningenieur, 52巻, 2号, 出版日 2001年
    英語
  • Discrete element simulations of dense packings and heaps made of spherical and non-spherical particles
    HG Matuttis; S Luding; HJ Herrmann
    POWDER TECHNOLOGY, ELSEVIER SCIENCE SA, 109巻, 1-3号, 掲載ページ 278-292, 出版日 2000年04月, The discrete element method (DEM) in the simulation of static packings allows one to investigate the behavior of granular materials by modeling the forces on the particle level. No macroscopic parameters like the angle of repose enter the simulation, but they can be extracted as a result of the particle properties like friction, roughness or shape. One of the issues of static packings recently discussed is the stress distribution under granular heaps. This problem is used to highlight the possibilities of modeling at the particle level using DEM. Phenomena like arching or stress-chains are observed even for spherical particles in a regular pile in the absence of friction if the bottom is rough. The situation does not change much if polygonal, frictional particles are used without disturbing the regular piling. For more realistic situations, when the pile is built by pouring grains from above, the packing and the stresses are influenced by the creation history. The more eccentric the polygons are, the more pronounced a dip is observed in the vertical stress under the apex of the sand-pile. (C) 2000 Elsevier Science S.A. All rights reserved.
    研究論文(学術雑誌), 英語
  • Molecular dynamics simulation of cohesive granular materials
    A Schinner; HG Matuttis
    TRAFFIC AND GRANULAR FLOW'99, SPRINGER-VERLAG BERLIN, 掲載ページ 505-510, 出版日 2000年
    研究論文(国際会議プロシーディングス), 英語
  • Towards a micromechanic understanding of the pressure distribution under heaps
    lexander Schinner; Hans-Georg Mattutis; Tetsuo Akiyama; Junya Aoki; Satoshi Takahashi; Keiko M. Aoki; Klaus Kassner
    Proceedings of RIMS Symposium on Mathematical Aspects of Complex Fluids II, RIMS Kokyoroku series, 1188巻, 出版日 2000年
    英語
  • Influence of the geometry on the pressure distribution of granular heaps
    Hans-Georg Matuttis; Alexander Schinner
    Granular Matter, 1巻, 4号, 出版日 1999年
    英語
  • The effect of particle shape and friction on the stresses in heaps of granular media in Friction
    H.-G. Matuttis; S. Luding
    Friction, Arching and Contact Dynamics, edited by D. E. Wolf and P. Grassberger, 出版日 1997年
    研究論文(国際会議プロシーディングス), 英語
  • The effect of interaction laws on the stresses in frictionless granular media
    S. Luding; H; G. Matuttis
    Friction, Arching and Contact Dynamics, edited by D. E. Wolf and P. Grassberger, 出版日 1997年
    英語
  • Simulation of the pressure distribution under a two dimensional heap of polygonal particles
    H. -G. Matuttis
    Granular Matter, 1巻, 2号, 掲載ページ 83-91, 出版日 1997年
    英語
  • Quantum Monte Carlo evidence for d-wave pairing in the two-dimensional Hubbard model at a van Hove singularity
    T Husslein; Morgenstern, I; DM Newns; PC Pattnaik; JM Singer; HG Matuttis
    PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, 54巻, 22号, 掲載ページ 16179-16182, 出版日 1996年12月, We implement a quantum Monte Carlo calculation for a repulsive Hubbard model with nearest- and next-nearest-neighbor hopping interactions on clusters up to 12 x 12. A parameter region where the Fermi level lies close to the van Hove singularity at the saddle points in the bulk band structure is investigated. A pairing tendency in the d(x2-y2), symmetry channel, but no other channel, is found. Estimates of the effective pairing interaction show that it is close to the value required for a 40 K superconductor. Finite-size scaling compares with the attractive Hubbard model.
    研究論文(学術雑誌), 英語
  • From BCS-like superconductivity to condensation of local pairs: A numerical study of the attractive Hubbard model
    JM Singer; MH Pedersen; T Schneider; H Beck; HG Matuttis
    PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, 54巻, 2号, 掲載ページ 1286-1301, 出版日 1996年07月, We investigate the two-dimensional attractive Hubbard model with quantum Monte Carlo techniques to reveal the crossover from a BCS-type superconductivity in the weak-coupling regime to a superconductivity properly described by a Bose-Einstein condensation (BEC) of local, preformed pairs. The crossover from BCS to BEC is particularly well exposed in the temperature dependence of both the spin susceptibility and the double occupancy, as well as by the appearance of a pseudogap in the density of states far above T-c. These features are also mirrored in the shape of the specific-heat peak around T-c, the separation of the temperature regimes where pair formation and their condensation occur, and in the transfer of spectral weight from the single-particle excitation branch to a pair band in the normal state.
    研究論文(学術雑誌), 英語
  • DENSITY-OF-STATES IN THE T'-HUBBARD MODEL - EXACT DIAGONALIZATION RESULTS
    W FETTES; MORGENSTERN, I; T HUSSLEIN; HG MATUTTIS; JM SINGER; C BAUR
    JOURNAL DE PHYSIQUE I, EDITIONS PHYSIQUE, 5巻, 4号, 掲載ページ 455-464, 出版日 1995年04月, We calculated the density of states in a Hubbard model with nearest and next nearest neighbour hopping. Using an exact diagonalisation technique, we examined this model in a wide area of parameters. The density of states was calculated for different fillings and for positive and negative interaction U. The additional hopping to the next nearest neighbour sites has different effects on the gap between the particle and hole spectrum compared to the pure Hubbard model.
    研究論文(学術雑誌), 英語
  • EFFICIENT PARALLELIZATION OF THE 2D SWENDSEN-WANG ALGORITHM
    R HACKL; HG MATUTTIS; JM SINGER; T HUSSLEIN; MORGENSTERN, I
    PHYSICA A, ELSEVIER SCIENCE BV, 212巻, 3-4号, 掲載ページ 261-276, 出版日 1994年12月, We established a fast Swendsen-Wang algorithm for the two-dimensional Ising model on parallel computers with a high efficiency. On an Intel paragon with 140 processors we reached spin update times of only 14 ns with an efficiency of 89%. This algorithm was used to examine the non-equilibrium relaxation of magnetization and energy in large Ising systems of a size up to 17920 x 17920 spins. Nevertheless we observed still a strong finite-size effect for the magnetization. We assume both magnetization and energy decay to behave like (t + DELTA)-lambda(e)-bt in an infinitely large system. Thus, for long times magnetization and energy show an exponential, asymtotic time-dependence, implying a critical dynamic exponent z of zero.
    研究論文(学術雑誌), 英語
  • 3D ISING-MODEL WITH SWENDSEN-WANG DYNAMICS - A PARALLEL APPROACH
    M BAUERNFEIND; R HACKL; HG MATUTTIS; J SINGER; T HUSSLEIN; MORGENSTERN, I
    PHYSICA A, ELSEVIER SCIENCE BV, 212巻, 3-4号, 掲載ページ 277-298, 出版日 1994年12月, We propose an efficient parallel implementation of the Swendsen-Wang algorithm for a 3D Ising system. A modified relaxation method was used for the parallelization. The simulations were performed on the Intel Paragon. We discuss the implementation in detail.
    研究論文(学術雑誌), 英語
  • SPIN-SPIN CORRELATIONS IN THE TT'-HUBBARD MODEL
    T HUSSLEIN; DM NEWNS; HG MATTUTIS; PC PATTNAIK; MORGENSTERN, I; JM SINGER; W FETTES; C BAUR
    JOURNAL DE PHYSIQUE I, EDITIONS PHYSIQUE, 4巻, 11号, 掲載ページ 1573-1576, 出版日 1994年11月, We present calculations of the tt'-Hubbard model using Quantum Monte Carlo techniques. The parameters are chosen so that the van Hove Singularity in the density of states and the Fermi level coincide. We study the behaviour of the system with increasing Hubbard interaction U. Special emphasis is on the spin-spin correlation (SSC). Unusual behaviour for large U is observed there and in the momentum distribution function (n(q)).
    英語
  • EXPERIENCES WITH REENGINEERING AND PARALLELIZING A HIGH-T(C) SUPERCONDUCTIVITY CODE
    U KLEIS; JM SINGER; MORGENSTERN, I; T HUSSLEIN; HG MATUTTIS
    PARALLEL COMPUTING, ELSEVIER SCIENCE BV, 20巻, 3号, 掲載ページ 399-407, 出版日 1994年03月, Motivated by experiments on high-T(c) superconducting compounds and made possible by the power of present day supercomputers, a number of researchers have used the Quantum Monte Carlo method to gain more insight into Hubbard-like many particle models.
    We used the Projector Quantum Monte Carlo method (PQMC) [1,2] as a computational technique for studying the physical properties of many-electron and quantum-spin systems.
    This review gives a survey of the algorithms and techniques as well as of the methods to implement the PQMC scheme on modem parallel computers like the Intel Hypercube or IBM RS/6000 workstation clusters.
    In order to study systems of larger size or with more complex interactions, increasingly large amounts of computational power are required.
    Although based on one particular algorithm, we believe that our results should interest simulators with quite different algorithms and other parallel architectures as well.
    英語
  • Virtuelle Parallelrechner
    J.M.Singer; H.-G.Matuttis
    Unix open, 8巻, 9号, 出版日 1994年
    英語
  • Numerical simulations of models for high-Tc superconductors
    I. Morgenstern; W. Fettes; T. Husslein; C. Baur; H.-G. Matuttis; J.M. Singer
    Proceedings of the 6th Joint EPS-APS International Conference on Physics Computing, Eds:R. Gruber, M. Tomassini, European Physical Society, 出版日 1994年
    英語
  • NUMERICAL-SIMULATION OF HIGH-TEMPERATURE SUPERCONDUCTORS
    MORGENSTERN, I; JM SINGER; T HUSSLEIN; HG MATUTTIS
    MATERIALS AND CRYSTALLOGRAPHIC ASPECTS OF HT(C)-SUPERCONDUCTIVITY, KLUWER ACADEMIC PUBL, 263巻, 掲載ページ 331-351, 出版日 1994年
    研究論文(国際会議プロシーディングス), 英語
  • Virtuelle Parallelrechner
    J.M.Singer; H.-G.Matuttis
    Unix open, 8巻, 9号, 出版日 1994年
    英語
  • PARALLELIZATION OF THE 2D SWENDSEN-WANG ALGORITHM
    R HACKL; HG MATUTTIS; JM SINGER; T HUSSLEIN; MORGENSTERN, I
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C-PHYSICS AND COMPUTERS, WORLD SCIENTIFIC PUBL CO PTE LTD, 4巻, 6号, 掲載ページ 1117-1130, 出版日 1993年12月, We implemented a parallel Swendsen-Wang algorithm for a 2D Ising system without magnetization in a host-node programming model. The simulations were performed on the Intel Hypercube IPSC/860. Our maximum number of updates/s on 32 nodes 1st three times as high as in the implementation by Stauffer and Kertesz on the same machine. With 32 processors we reach half the speed of the simulations by Tamayo and Flanigan on 256 nodes of a CM5. We discuss the non-equilibrium relaxation for the energy and the magnetization.
    研究論文(学術雑誌), 英語
  • PARALLELIZATION OF THE 2D SWENDSEN-WANG ALGORITHM
    R HACKL; HG MATUTTIS; JM SINGER; T HUSSLEIN; MORGENSTERN, I
    INTERNATIONAL JOURNAL OF MODERN PHYSICS C-PHYSICS AND COMPUTERS, WORLD SCIENTIFIC PUBL CO PTE LTD, 4巻, 6号, 掲載ページ 1117-1130, 出版日 1993年12月, We implemented a parallel Swendsen-Wang algorithm for a 2D Ising system without magnetization in a host-node programming model. The simulations were performed on the Intel Hypercube IPSC/860. Our maximum number of updates/s on 32 nodes 1st three times as high as in the implementation by Stauffer and Kertesz on the same machine. With 32 processors we reach half the speed of the simulations by Tamayo and Flanigan on 256 nodes of a CM5. We discuss the non-equilibrium relaxation for the energy and the magnetization.
    研究論文(学術雑誌), 英語
  • DOUBLE-LAYER HUBBARD-MODEL - OFF-DIAGONAL LONG-RANGE ORDER IN THE NODELESS D-WAVE CHANNEL
    MORGENSTERN, I; T HUSSLEIN; JM SINGER; HG MATUTTIS
    JOURNAL DE PHYSIQUE I, EDP SCIENCES S A, 3巻, 4号, 掲載ページ 1043-1051, 出版日 1993年04月, We report on a numerical study of the double layer Hubbard model describing the CuO2 sheets in the high-T(c) oxides. For the simulation we employed the projector quantum Monte Carlo method (PQMC) to study the ground state properties of this correlated electron system. Our results provide evidence for off-diagonal long range order in the nodeless d-wave channel. The implications with respect to possible mechanisms for high-T(c) superconductivity in oxides in combination which phononic booster mechanisms are discussed.
    研究論文(学術雑誌), 英語
  • QUANTUM MONTE-CARLO SIMULATIONS OF THE APEX-OXYGEN-MODEL
    JM SINGER; T HUSSLEIN; MORGENSTERN, I; HG MATUTTIS
    PHYSICS COMPUTING '92, WORLD SCIENTIFIC PUBL CO PTE LTD, 掲載ページ 465-467, 出版日 1993年
    研究論文(国際会議プロシーディングス), 英語
  • NUMERICAL-SIMULATION OF THE DOUBLE-LAYER HUBBARD-MODEL
    MORGENSTERN, I; T HUSSLEIN; JM SINGER; HG MATUTTIS
    JOURNAL DE PHYSIQUE II, EDITIONS PHYSIQUE, 2巻, 8号, 掲載ページ 1489-1493, 出版日 1992年08月, We have carried out Quantum Monte Carlo studies to investigate the double layer Hubbard model using the groundstate projector formalism. Evidence for off diagonal long range order in the nodeless d-wave pairing channel is provided. It is emphasized that the Projector Quantum Monte Carlo method has the potential to detect superconducting mechanisms in strongly correlated electron systems, which are not treatable by standard analytic methods. The Monte Carlo technique provides useful information about systems much larger than those accessible for exact diagonalization methods.
    研究論文(学術雑誌), 英語

MISC

  • Deutsche Forscher Betreuen Deutsche Studierende
    Hans-Georg Matuttis
    出版日 2016年04月, Neues vom Club (ドイツ語圏日本学術振興会研究者同窓会の雑誌), 62巻, 1号, 掲載ページ 6-6, ドイツ語, その他
  • Wissenschaftlicher Gesprächskreis am 20.5.2015 im DAAD Büro Tōkyō
    Hans-Georg Matuttis
    出版日 2015年06月, Neues vom Club イツ語圏日本学術振興会研究者同窓会の雑誌, 59巻, 2号, 掲載ページ 12-12, ドイツ語, その他
  • Understanding the Discrete Element Method: Simulation of Non-Spherical Particles for Granular and Multi-body Systems
    Hans-Georg Matuttis; Jian Chen
    Gives readers a more thorough understanding of DEM and equips researchers for independent work and an ability to judge methods related to simulation of polygonal particles. Introduces DEM from the fundamental concepts (theoretical mechanics and solidstate physics), with 2D and 3D simulation methods for polygonal particles. Provides the fundamentals of coding discrete element method (DEM) requiring little advance knowledge of granular matter or numerical simulation. Highlights the numerical tricks and pitfalls that are usually only realized after years of experience, with relevant simple experiments as applications. Presents a logical approach starting withthe mechanical and physical bases,followed by a description of the techniques and finally their applications. Written by a key author presenting ideas on how to model the dynamics of angular particles using polygons and polyhedral. Accompanying website includes MATLAB-Programs providing the simulation code for two-dimensional polygons. Recommended for researchers and graduate students who deal with particle models in areas such as fluid dynamics, multi-body engineering, finite-element methods, the geosciences, and multi-scale physics., Wiley Blackwell, 出版日 2014年06月23日, Understanding the Discrete Element Method: Simulation of Non-Spherical Particles for Granular and Multi-body Systems, 掲載ページ 1-456, 英語, その他, 84927580012
  • 28aAJ-5 粒子-流体混合系のレオロジー(28aAJ 圧縮性流体・希薄流体,複雑流体,電磁流体,熱流体,領域11(物性基礎論・統計力学・流体物理・応用数学・社会経済物理))
    ウン シハン; マトゥッティス ハンス-ゲオルグ
    一般社団法人日本物理学会, 出版日 2014年03月05日, 日本物理学会講演概要集, 69巻, 1号, 掲載ページ 315-315, 英語, 1342-8349, 110009834683, AA11439205

書籍等出版物

  • Understanding the Discrete Element Method: Simulation of Non-Spherical Particles for Granular and Multi-body Systems
    Hans-Georg Matuttis; Jian Chen
    教科書・概説・概論, 英語, 共著, Wiley, 出版日 2014年04月
  • Quantum Monte Carlo Investigations for the Hubbard Model
    H.-G. Matuttis; I. Morgenstern
    英語, Computational Physics, eds. Karl Heinz Hoffmann, Michael Schreiber (Eds.), 出版日 1996年

講演・口頭発表等

  • Discrete Element Simulations from two-dimensions with polygons to three dimensions with rods
    Yuki Shimizu; Hans-Georg Matuttis; Dominik Krengel; Jian Chen
    口頭発表(一般), 英語, WCCM2022 15th World Congress on Computational Mechanics, 国際会議
    発表日 2022年08月10日
  • Numerical stabilization for the constraint formulation of many-body-many-contact Coulomb friction
    Hans-Georg Matuttis; Keita Shinohara; Dominik Krengel; Jian Chen; Jan Mueller
    口頭発表(一般), 英語, WCCM2022 15th World Congress on Computational Mechanics, 国際会議
    発表日 2022年08月10日
  • Avalanching of variously shaped DEM particles in a rotating drum
    Dominik Krengel; Hans-Georg Matuttis; Ryota Shiyake; Mamoru Kikumoto
    口頭発表(一般), 英語, WCCM2022 15th World Congress on Computational Mechanics, 国際会議
    発表日 2022年08月01日
  • Development of a Plate Discrete Element Method: Geometry and Kinematics
    Jian Chen; Hans-Georg Matuttis
    口頭発表(一般), 英語, The 13th International Conference on Computational Methods (Virtual), 国際会議
    発表日 2022年06月26日
  • The Good, the Bad and the Ugly: droplet recognition by a “shootout”-heuristics
    Hans-Georg Matuttis
    口頭発表(一般), 英語, WIVACE 2021 XV International Workshop on Artificial Life and Evolutionary Computation, 国際会議
    発表日 2021年09月17日
  • Implementation of numerically exact Coulomb friction for discrete element simulations in three dimensions
    Shouta Sakamaki; Dominik Krengel; Jan Mueller; Jian Chen; Hans-Georg Matuttis
    口頭発表(一般), 英語, Proceedings of Powders and Grains, EPJ Web of Conferences, Hans-Georg Matuttis, Argentine / ZOOM, 国際会議
    発表日 2021年07月21日
  • Grid-algorithm improvements for dense suspensions of discrete element particles in finite element fluid simulations
    Jan Mueller; Akira Kyotani; Hans-Georg Matuttis
    ポスター発表, 英語, Powders and Grains 2021, EPJ Web of Conferences, Jan Mueller, 国際会議
    発表日 2021年07月
  • Experimental study of particle shape dependence of avalanches inside a rotating drum
    Jian Chen; Dominik Krengel; Hans-Georg Matuttid
    ポスター発表, 英語, EPJ Web of Conferences, Proceedings of Powders and Grains, 国際会議
    発表日 2021年07月
  • 連続的に変化する有限要素メッシュによる 精度と性能の向上
    Mueller Jan; 泉 伊智郎; Matuttis Hans-Georg
    口頭発表(一般), 日本語, 第32回数値流体力学シンポジウム, 国内会議
    発表日 2019年12月13日
  • On the origin of modern physics in the -dark- middle ages
    Hans-Georg Matuttis
    口頭発表(一般), 英語, 8th Meeting of the JSPS-Club in Japan, 国内会議
    発表日 2019年10月07日
  • 漏斗内部の粉体の流れと詰まりのシミュレーション
    坂牧聖太; Dominik Krengel; 篠原啓太; Matuttis Hans-Georg
    口頭発表(一般), 日本語, 日本流体力学会, 国内会議
    発表日 2019年09月19日
  • 加振による液状化現象下における微小粒子間の流れのシミュレーション
    後藤大輝; 京谷 在; Mueller Jan; Matuttis Hans-Georg
    口頭発表(一般), 日本語, 日本流体力学会 年会2019, 国内会議
    発表日 2019年09月15日
  • 粘性摩擦の働く平面上を転がり運動する楕円体のシミュレーションと実験
    森本輝織; 野上歩; Dominik Krengel; Hans-Georg Matuttis
    口頭発表(一般), 日本語, 日本流体力学会 年会2019, 国内会議
    発表日 2019年09月15日
  • グレイディッドメッシュを用いた流体中の粒子の 堆積に関する FEM シミュレーション
    Hans-Georg Matuttis; Ichiro Izumi; Jan Mueller
    口頭発表(一般), 英語, 日本流体力学会 年会2019, 国内会議
    発表日 2019年09月14日
  • 多粒子を含む流体シミュレーションの為の P2P1 有限要素への 3 次バブルの導入
    Jan Mueller; Hans-Georg Matuttis
    口頭発表(一般), 英語, 日本流体力学会 年会2019, 国内会議
    発表日 2019年09月14日
  • 連続的に変化する有限要素メッシュによる 精度と性能の向上
    Mueller Jan; 泉 伊智郎; Matuttis Hans-Georg
    口頭発表(一般), 日本語, 第32回数値流体力学シンポジウム, 国内会議
    発表日 2018年12月13日
  • 非球型DEM粒子の回転の減衰
    Krengel Dominik; Matuttis Hans- Georg
    口頭発表(一般), 日本語, 第32回数値流体力学シンポジウム, 国内会議
    発表日 2018年12月13日
  • Alternative Hubbard-Stratonovich Transformations and the Minus Sign Problem
    Hans-Georg Matuttis; Katsuaki Kobayashi
    口頭発表(一般), 英語, 第73 回年次大会(2018 年)
    発表日 2018年03月25日
  • Numerically exact formulation for Many-Body Coulomb friction
    口頭発表(一般), 英語, 日本物理学会 第 73 回年次大会(2018 年)
    発表日 2018年03月23日
  • Stress-Strain diagrams for non-convex particles
    H.-G. Matuttis; M. Nawa; D. Krengel
    口頭発表(一般), 英語, Powders & Grains 2017 EPJ Web of Conferences, 国内会議
    発表日 2017年07月04日
  • Unrecognized type of instability in combined Discrete-Element- Finite-Element methods
    Fumikazu Morikawa; Hans-Georg Matuttis; Ng Shi Han
    口頭発表(一般), 英語, THESIS-2016 Two-pHasemodEllingfor Sediment dynamIcS、The 3rd symposium on two-phase modelling for sediment dynamics in geophysical flows, http://c-faculty.chuo-u.ac.jp/~ths2016/, 国際会議
    発表日 2016年09月14日
  • Computation of effective viscosities in Couette-flow with combined particle-fluid simulation
    T.L. Cheik; D. Krengel; H.-G. Matuttis
    ポスター発表, 英語, THESIS-2016 Two-pHasemodEllingfor Sediment dynamIcS、The 3rd symposium on two-phase modelling for sediment dynamics in geophysical flows, 国際会議
    発表日 2016年09月13日
  • Size seggregation in fluid-particle mixtures
    Fumikazu Morikawa; Hans-Georg Matuttis; Ng Shi Han
    口頭発表(一般), 英語, 日本物理学会年会, 国内会議
    発表日 2016年03月19日
  • A Discrete Element Method of Non-Convex polygons
    MATUTTIS Hans-Georg
    口頭発表(一般), 英語, 日本流体力学会 年会2015, 国内会議
    発表日 2015年09月29日
  • 流体中におけるサイズの異なる粒子の分離の二次元シミュレーション
    森川 史和; Shi Han Ng; MATUTTIS Hans-Georg
    口頭発表(一般), 日本語, 日本流体力学会 年会2015, 国内会議
    発表日 2015年09月28日
  • Rheology of Fluid-Particle mixtures
    TAN Ling Cheik; NG Shi Han; MATUTTIS Hans-Georg
    口頭発表(一般), 英語, 日本流体力学会 年会2015, 国内会議
    発表日 2015年09月28日
  • Coulomb-friction, Differential algebraic systems and the Painleve paradox
    Hans-Georg Matuttis; Dominik Krengel; Chen Jian
    ポスター発表, 英語, International Meeting of Friction – from atomic to geophysical scales – Earthquake Research Institute, The University of Tokyo, 国内会議
    発表日 2015年09月14日
  • "Numerically Exact Friction Implementation for Two-dimensional Particle Systems"
    Dominik Krengel; Hans-Georg Matuttis
    ポスター発表, 英語, International Meeting of Friction – from atomic to geophysical scales – Earthquake Research Institute, The University of Tokyo, 国内会議
    発表日 2015年09月14日
  • Convergence for the groundstate auxiliary field method
    Katsuaki Kobayashi; Hans-Georg Matuttis; Xiaoxing Wang
    ポスター発表, 英語, Dynamics of Strongly Correlated Systems ISSP University of Tokyo, 国際会議
    発表日 2015年03月30日
  • Rheology of Fluid-Particle Mixtures
    Ling Cheik Tan; Shi Han Ng; Hans-Georg Matuttis
    口頭発表(一般), 英語, 第70日本物理学会年次大会
    発表日 2015年03月22日
  • Simulation results for spinning tops with a particular distribution of mass and shape
    Hans-Georg Matuttis; Hikaru Watanabe
    口頭発表(一般), 英語, 第70回物理学会次大会, http://jps2015s.gakkai-web.net/data/html/program11.html, 国内会議
    発表日 2015年03月21日
  • Bulk material strength of polyhedral assemblies
    Dominik Krengel; Wei Shen Cheng; Hans-Georg Matuttis
    口頭発表(一般), 英語, 第70日本物理学会年次大会, 国内会議
    発表日 2015年03月21日
  • Numerically exact friction implementation for two-dimensional particle systems
    Dominik Krengel; Hans-Georg Matuttis
    口頭発表(一般), 英語, 日本物理学会年会, 国内会議
    発表日 2015年03月19日
  • Thoughts on sampling distributions with “negative probabilities” and the fermionic sign problem
    Hans-Georg Matuttis; Xiaoxing Wang; Katsuaki Kobayashi
    ポスター発表, 英語, International Workshop on New Frontier of Numerical Methods for Many-Body Correlations ― Methodologies and Algorithms for Fermion Many-Body Problems, 国際会議
    発表日 2015年02月20日
  • 形状効果による粒状集合の充填密度
    Cheng Wei Chen; Krengel Dominik; Matuttis Hans-Georg
    口頭発表(一般), 日本語, 第28回数値流体力学シンポジウム, 国内会議
    発表日 2014年12月09日
  • 地滑りのための微視的なメカニカ ル解析
    Tan Ling Cheik; Ng Shi Han; Matuttis Hans-Georg
    口頭発表(一般), 日本語, 第28回数値流体力学シンポジウム, 国内会議
    発表日 2014年12月09日
  • 離散要素法を用いた周囲の粒子による基礎の減衰
    森川 史和; Ng Shi Han; Bayat Mehdi; Matuttis Hans-Georg; Andersen Lars Vabbersgaard
    口頭発表(一般), 日本語, 第28回数値流体力学シンポジウム, 国内会議
    発表日 2014年12月09日
  • Shape effects on the density of granular assemblies
    Dominik Krengel; Wei Shen Cheng
    口頭発表(一般), 英語, The 63rd National Congress of Theoretical and Applied Mechanics, Japan, http://news-sv.aij.or.jp/nctam/63/, 国内会議
    発表日 2014年09月26日
  • Synergies from using higher order symplectic decompositions both for ordinary differential equations and quantum Monte Carlo methods
    XiaoxingWang; Hans-Georg Matuttis
    シンポジウム・ワークショップパネル(公募), 英語, 13TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS, Rhodos, 国際会議
    発表日 2014年09月23日
  • Synergies from using higher order symplectic decompositions both for ordinary differential equations and quantum Monte Carlo methods
    TH INTERNATIONAL; CONFERENCE OF; NUMERICAL ANALYSIS AND APPLIED MATHEMATICS
    口頭発表(一般), 英語, 13TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATIC, European Society of Computational Methods in Sciences, Engineering and Technology (ESCMCET), Rhodos, Greece, http://www.icnaam.org, 国際会議
    発表日 2014年09月23日
  • Synergies from using higher order symplectic decompositions both for ordinary differential equations and quantum Monte Carlo methods
    TH INTERNATIONAL; CONFERENCE OF; NUMERICAL ANALYSIS AND APPLIED MATHEMATICS
    口頭発表(一般), 英語, 13TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATIC, European Society of Computational Methods in Sciences, Engineering and Technology (ESCMCET), Rhodos, Greece, http://www.icnaam.org, 国際会議
    発表日 2014年09月23日
  • 離散要素法を用いた周囲の粒子による基礎の減衰
    森川史和; Ng Shihan; Mehdi Bayat; Hans-Georg Matuttis
    口頭発表(一般), 日本語, The 63rd National Congress of Theoretical and Applied Mechanics, Japan, 日本学術会議, http://news-sv.aij.or.jp/nctam/63/#Symposium, 国内会議
    発表日 2014年09月23日
  • The FermionicMinus-SignProblem: Newperceptions from higher-order Suzuki-Trotter decompositionmethods
    Hans-Georg Matuttis; Xiaoxing Wang
    ポスター発表, 英語, ISSP International Workshop, “New Horizon of Strongly Correlated Physics” (NHSCP2014), 国際会議
    発表日 2014年06月28日
  • Rheology of Fluid-Particle Mixtures
    Hans-Georg Matuttis; Shi Han Ng
    口頭発表(一般), 英語, 第55日本物理学会次大会, 国内会議
    発表日 2014年03月
  • From polyhedra to spheres: The e ffect of shape on the density
    Dominik Krengel; Hans-Georg Matuttis
    口頭発表(一般), 英語, 第55日本物理学会次大会, 国内会議
    発表日 2014年03月
  • Polygonal Particles in Fluids
    Shi Han Ng; Hans-Georg Matuttis
    ポスター発表, 英語, Powders and Grains 2013 (Sydney, Australia), 国際会議
    発表日 2013年07月
  • Granular Acoustics of Polyhedral Particles
    Wei Shen Cheng; Jian Chen; Hans-Georg Matuttis
    ポスター発表, 英語, Powders and Grains 2013 (Sydney, Australia), 国際会議
    発表日 2013年07月
  • Formation of Granular Heaps in Fluids
    Shi Han Ng; Hans-Georg Matuttis
    ポスター発表, 英語, 25th IUPAP International Conference on Statistical Physics (Seoul National University, Seoul, Korea), 国際会議
    発表日 2013年07月
  • Adverse Effects on the Accuracy for “Sampling with Sign” in the Hubbard System
    XiaoxingWang; Hans-Georg Matuttis
    ポスター発表, 英語, 25th IUPAP International Conference on Statistical Physics (Seoul National University, Seoul, Korea), 国際会議
    発表日 2013年07月
  • Effect of the surrounding fluid on the compaction of granular materials by tapping: Slow dynamics made slowe
    Shi Han Ng; Hans-Georg Matuttis
    口頭発表(一般), 英語, The 4th International Symposium on Slow Dynamics in Complex Systems (Tohoku University)
    発表日 2012年12月
  • Incompressible Fluid Simulation with Granular Particles with Adaptive Grid and Adaptive Stepsize
    Shi Han Ng; Hans-Georg Matuttis
    口頭発表(一般), 英語, 第61回 理論応用力学講演会, 国内会議
    発表日 2012年03月
  • 多面体を用いて三次元離散要素法の並列化
    陳健,Hans-Georg Matuttis
    口頭発表(一般), 日本語, 第61回 理論応用力学講演会, 国内会議
    発表日 2012年03月
  • Combination of Discrete and Finite Elements for the microscopic simulation of particle-loaded flows
    Shi Han Ng; Hans-Georg Matuttis
    口頭発表(一般), 英語, International Symposium on Complex Systems 2011 (The University of Tokyo), 国際会議
    発表日 2011年12月
  • Sedimentation of two-dimensional polygonal DEM-particles in an incompressible FEM-fluid
    Shi Han Ng; Hans-Georg Matuttis
    ポスター発表, 英語, Nonequilibrium Dynamics in Astrophysics and Material Science (Kyoto University, Yukawa Institue of Theoretical Physics), 国際会議
    発表日 2011年10月
  • Shi Han Ng, Hans-Georg Matuttis
    Two-dimensional Microscopic Simulation of Granular Particles in Fluid
    口頭発表(一般), 英語, 第60回 理論応用力学講演会, 国内会議
    発表日 2011年03月
  • 有限要素法による粘弾性円盤と外壁の接触問題の研究
    本悠,陳健
    口頭発表(一般), 日本語, 第60回 理論応用力学講演会, 国内会議
    発表日 2011年03月
  • 準二次元の粒状堆積丘に関する研究
    陳健; 白井優太郎
    口頭発表(一般), 日本語, 第60回 理論応用力学講演会, 国内会議
    発表日 2011年03月
  • Simulation of Flow Problems with Free Boundaries in 2D using the Finite Element Method
    Shi Han Ng; Hans-Georg Matuttis
    口頭発表(一般), 英語, 第24回数値流体力学シンポジウム, 国内会議
    発表日 2010年12月
  • Adaptive Mesh Generation for two-dimensional Simulation of Polygonal Particles in Fluid
    Shi Han Ng; Hans-Georg Matuttis
    口頭発表(一般), 英語, 第59回 理論応用力学講演会, 国内会議
    発表日 2010年06月
  • 59th Japan national congress for theoretical and applied mechanics
    X. Wang; H.-G. Matuttis
    口頭発表(一般), 英語, 第59回 理論応用力学講演会, 国内会議
    発表日 2010年06月
  • Theoretical and applied mechanics Japan
    J. Chen; A. Schinner; H.-G. Matuttis
    口頭発表(一般), 英語, 第59回 理論応用力学講演会, 国内会議
    発表日 2010年06月
  • Numerical irreversibility in many particle systems
    X. Wang; H.-G. Matuttis
    口頭発表(一般), 英語, The 57th Spring Meeting of The Japan Society of Applied Physics and Related Societies, Tokai University, 国内会議
    発表日 2010年03月
  • Discrete element simulation for polyhedral granular particles
    Chen Jian; Matuttis Hans-Georg
    口頭発表(一般), 英語, The 57th Spring Meeting of The Japan Society of Applied Physics and Related Societies, Tokai University, 国内会議
    発表日 2010年03月
  • History Dependence of the Density Distribution on Granular Heaps
    Jian Chen; Lisa Watanabe; Hans-Georg Matuttis; Hide Sakaguchi
    ポスター発表, 英語, Powders and Grains 2009, 6th International Conference on Micromechanics of Granular Media (AIP, Golden, Colorado, 2009)., 国際会議
    発表日 2009年07月
  • Simulation of Polygonal Grains in a Finite-Element-Fluid
    Yusuke Sakai; Jian Chen; Hans-Georg Matuttis
    ポスター発表, 英語, Powders and Grains 2009, 6th International Conference on Micromechanics of Granular Media (AIP, Golden, Colorado, 2009), 国際会議
    発表日 2009年07月
  • 二次元粉粒体中における応力分布の測定及びシミュレーション
    板橋洋平; Hans-Georg Matuttis
    口頭発表(基調), 日本語, 日本物理学会, 国内会議
    発表日 2006年09月
  • 離散要素法による回転運動する楕円扁球の数値シミュレーホン
    諏訪光太; Hans-Georg Matuttis
    口頭発表(基調), 日本語, だい61物理学会, 日本物理学会, 国内会議
    発表日 2006年09月
  • ニュトン流体中の粒子シミュレーション
    鈴木宗文; Hans-Georg Matuttis
    口頭発表(基調), 日本語, 第61日本物理学会, 日本物理学会, 国内会議
    発表日 2006年09月
  • Preliminaries for the Implementation of a simulation of polygonal particles in an incompressible Newtonian Fluid
    Takafumi Suzuki; Hans-Georg Matuttis
    口頭発表(基調), 日本語, 国際高等研究所研究プロジェクト 「隙間-自然・人間・社会の現象学」ワークショップ, 財団法人 国際高等研究所 研究支援部, 国内会議
    発表日 2006年08月
  • Strategies for an optimized simulation of granular particles in an incompressible Newtonian Fluid
    Hans-Georg Matuttis
    口頭発表(基調), 日本語, 国際高等研究所研究プロジェクト 「隙間-自然・人間・社会の現象学」ワークショップ, 財団法人 国際高等研究所 研究支援部, 国内会議
    発表日 2006年08月
  • 京都大学数理解析研究所講究緑1472
    Strategies for; an; o; timize; simulation of granular; particles in a Newtonian; Fluid, Par; Basics
    口頭発表(基調), 英語, 複雑流体の数理とその応用, 国内会議
    発表日 2005年08月

担当経験のある科目_授業

  • Phenomenology of Friction
    慶應大学
  • Phenomenology of Friction
    慶應大学
  • インターンシップ(海外)(M, 類III)
    The University of Electro-Communications
  • インターンシップ(海外)(M, 類III)
    電気通信大学
  • 研究室見学 (Current Topics in Fundamental Science and Engineering A)
    The University of Electro-Communications
  • 研究室見学 (Current Topics in Fundamental Science and Engineering A)
    電気通信大学
  • 総合コミュニケーション科学
    The University of Electro-Communications
  • 総合コミュニケーション科学
    電気通信大学
  • "Special Lecture on Informatics and Engineering A"
    The University of Electro-Communications
  • "Special Lecture on Informatics and Engineering A"
    電気通信大学
  • Introduction to Computational MEthods in Science and Engineering
    The University of Electro-Communications
  • Introduction to Computational MEthods in Science and Engineering
    電気通信大学
  • Internship (M, KaigaiM)
    The University of Electro-Communications
  • Internship (M, KaigaiM)
    電気通信大学
  • Nihon Gijutsu Kagaku B
    The University of Electro-Communications
  • Nihon Gijutsu Kagaku B
    電気通信大学
  • Graduate Technical English
    The University of Electro-Communications
  • Graduate Technical English
    電気通信大学
  • Butsurigaku Enshuu 1I
    The University of Electro-Communications
  • Butsurigaku Enshuu 1I
    電気通信大学
  • Butsurigaku Enshuu 1
    The University of Electro-Communications
  • Butsurigaku Enshuu 1
    電気通信大学
  • Special Lecture on Information and Engineering A (Curretn Topics in Fundamental Science and Engineering A)
    The University of Electro-Communications
  • Special Lecture on Information and Engineering A (Curretn Topics in Fundamental Science and Engineering A)
    電気通信大学
  • インターンシップ(M, 類III)、インターンシップ(海外)(M, 類III))
    電気通信大学
  • インターンシップ(M, 類III)、インターンシップ(海外)(M, 類III))
    電気通信大学
  • Introduction to computational methods  in science and engineering
    The University of Electro-Communications
  • Introduction to computational methods  in science and engineering
    電気通信大学
  • インターンシップ(M)、インターンシップ(海外)(M)
    電気通信大学
  • インターンシップ(M)、インターンシップ(海外)(M)
    電気通信大学
  • 日本御術科学B
    電気通信大学
  • 大学院技術英語
    電気通信大学
  • Introduction to computational methods in science and engineering
    電気通信大学
  • 基礎物理学演習 I
    電気通信大学
  • PBL
    電気通信大学
  • PBL
    電気通信大学
  • 学部インターンシップ担当
    電気通信大学
  • 学部インターンシップ担当
    電気通信大学
  • インターンシップ担当
    電気通信大学
  • インターンシップ担当
    電気通信大学
  • 力学系現象特論
    電気通信大学
  • 基礎物理学演習 II
    電気通信大学
  • 日本御術科学B
    The University of Electro-Communications
  • 日本御術科学B
    電気通信大学
  • 大学院技術英語
    The University of Electro-Communications
  • 大学院技術英語
    電気通信大学
  • 海外インターンシップ
    電気通信大学
  • 海外インターンシップ
    電気通信大学
  • インターンシップ
    The University of Electro-Communications
  • インターンシップ
    電気通信大学
  • 力学系現象特論
    The University of Electro-Communications
  • 力学系現象特論
    電気通信大学
  • 基礎物理学演習 II
    The University of Electro-Communications
  • 基礎物理学演習 II
    電気通信大学
  • 基礎物理学演習 I
    The University of Electro-Communications
  • 基礎物理学演習 I
    電気通信大学

所属学協会

  • Deutsche Physikalische Gesellschaft
  • 日本物理学会
  • 日本流体力学会
  • Humboldt-Foundation Japan East
  • JSPS-Club (Federation of the German former Alumni of the JSPS-Scholarship scheme)

その他

  • JUSST Independent Study Project Niklas Duong
    2016年 - 2016年