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Diversity and universality of jamming
Researchers at Chinese Academy of Science and Osaka University show that, unlike the crystalline close packing of spheres, random close packing or jamming of spheres in a container can take place in a broad range of densities and anisotropies. Furthermore, they show that such diverse jammed states are all just marginally stable and exhibit common universal critical properties.
Scientists at the theoretical institutes, Chinese Academy of Science and Cybermedia Center at Osaka University performed extensive computer simulations to generate and examine random packing of spheres. They show that the “jamming” transition, in which a free-flowing material becomes stuck, occurs with universal features despite the diversity of their details. This work may shed light on the physics of amorphous materials and optimization problems in computer science which are intimately related to the mathematics of sphere packings.
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IMAGE: Configuration of a hard-sphere glass close to jamming. For a comparison, the close packed structure of the crystalline face-centered cubic (FCC) configuration is also shown on the right-hand side. view more
Credit: Osaka University
Researchers at Chinese Academy of Science and Osaka University show that, unlike the crystalline close packing of spheres, random close packing or jamming of spheres in a container can take place in a broad range of densities and anisotropies. Furthermore, they show that such diverse jammed states are all just marginally stable and exhibit common universal critical properties.
Osaka, Japan - Scientists at the theoretical institutes, Chinese Academy of Science and Cybermedia Center at Osaka University performed extensive computer simulations to generate and examine random packing of spheres. They show that the jamming transition, in which a free-flowing material becomes stuck, occurs with universal features despite the diver
ChinaOsakaJapanUnited-statesChineseAmericaHajime-yoshinoYuliang-jinOsaka-universityCybermedia-center-at-osaka-universityChinese-academy-of-scienceResearchers-at-chinese-academy-of-scienceOsaka University to Start Operation of NEC s Cloud-linked Supercomputer System
TOKYO, Dec 14, 2020 - (JCN Newswire) - The Cybermedia Center, Osaka University, in cooperation with NEC Corporation (NEC; TSE: 6701), announced today it will introduce a new cloud-linked High Performance Computing (HPC) and High Performance Data Analysis (HPDA) supercomputer system from NEC. This will replace the existing system provided by NEC, and is scheduled to commence operation in May 2021.
The new supercomputer system is composed of 1,520 general-purpose CPU nodes, each of which is a state-of-the-art general-purpose computational node with a 3rd Gen Intel Xeon Scalable processor (codename Ice Lake) featuring Intel Deep Learning boost technology, 42 GPU nodes, each of which is equipped with eight NVIDIA A100 Tensor Core GPUs that accelerate workload for AI, data analytics, HPC, and visualization and 36 VECTOR nodes, each of which features eight NEC SX-Aurora TSUBASA units that allow faster and high
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