International Collaboration for Science of Order/Disorder

我们研究了丰富多样的非平衡开放系统中复杂现象的细节，并与世界各地的科学家合作，利用虚拟现实方法和发声技术开发了一种新的表示系统。我们的合作研究总结如下：(1)通过MHD模拟，我们发现旋转球壳中的MHD发电机过程会自发产生一个具有整体有序结构的强磁场，并且它的极性是间歇反转的。(2)为了研究螺旋聚变装置等离子体中压力驱动不稳定性的非线性演化，开发了一个新的模拟程序来求解螺旋坐标系下的非线性MHD方程。阐明了阻性气球模式的一些特征。(3)关于电子注入引起的双层形成，等离子体速度…的微尺度扰动发现更多的城市分布在有序结构的形成中起着重要作用。(4)通过Fokker-Planck-磁流体模拟，给出了快离子和Alfven本征模在托卡马克等离子体中的爆发行为。研究发现，快离子分布中阶梯状结构的形成和破坏是产生爆裂行为的关键过程。(5)研究表明，尘埃等离子体中的粒子通过凝聚以“触发”的方式改变电荷并长大。阐明了触发充电的背景等离子体温度和颗粒尺寸条件。(6)通过分子动力学模拟研究了高分子链的结构形成。研究发现，高分子链的结构形成是循序渐进的，链分子在六角形相中纵向运动。(7)在虚拟现实系统中引入了听觉显示系统，并提出了一种新的模拟结果的声学表示方法。这使我们能够更容易、更详细地理解复杂的物理现象。较少

We have investigated the details of complex phenomena in a rich variety of non-equilibrium open systems, and developed a new representation system using both virtual reality method and sonification in collaboration with the scientists of all over the world. The summary of our collaboration research is described in the following.(1) We found by means of the MHD simulation that a strong magnetic field with a global and ordered structure is spontaneously generated by the MHD dynamo process in a rotating spherical shell, and that its polarity is intermittently reversed.(2) In order to investigate the nonlinear evolution of the pressure-driven instability in the plasma of he helical fusion device, a new simulation code was developed to solve nonlinear MHD equations in a helical coordinate system. Some characteristic features of resistive ballooning modes are being clarified.(3) Regarding a double layer formation due to the injection of electrons, a micro-scale disturbance of the plasma velo … More city distribution is found to play an important role in the ordered structure formation.(4) The bursting behavior of fast ions and Alfven eigenmodes in a tokamak plasma is shown by means of the Fokker-Planck-magnetohydrodynamic simulation. It is found that the key process for the bursting behavior is the formation and destruction of the stepwise structure in fast-ion distribution.(5) It was shown that the grains in dusty plasmas change their charges in the way of "flip-flop" and grow in size through the coagulation. Also clarified is the condition of the background plasma temperature and grain size for the "flip-flop" charging and resultant growth of grains.(6) We have investigated a structure formation of polymer chains by carrying out a molecular dynamics simulation. It is found that the structure formation of polymer chains proceeds in a stepwise way and the chain molecules become longitudinally mobile in a hexagonal phase.(7) We introduced an auditory display system to the virtual reality system, and developed a new representation method of simulation results using sonification. This enables us to comprehend complex physical phenomena easily and in detail. Less