{"_buckets": {"deposit": "98a7e8b9-bf62-4029-ae98-80458dfa2f01"}, "_deposit": {"id": "4979", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "4979"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00004979", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2016-11", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "4", "bibliographicPageEnd": "422", "bibliographicPageStart": "411", "bibliographicVolumeNumber": "30", "bibliographic_titles": [{"bibliographic_title": "The International Journal of High Performance Computing Applications", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "We present high-performance simulations of global seismic wave propagation with an unprecedented accuracy of 1.2?s seismic period for a realistic three-dimensional Earth model using the spectral element method on the K computer. Our seismic simulations use a total of 665.2 billion grid points and resolve 1.8 trillion degrees of freedom. To realize these large-scale computations, we optimize a widely used community software code to efficiently address all hardware parallelization, especially thread-level parallelization to solve the bottleneck of memory usage for coarse-grained parallelization. The new code exhibits excellent strong scaling for the time stepping loop, that is, parallel efficiency on 82,134 nodes relative to 36,504 nodes is 99.54%. Sustained performance of these computations on the K computer is 1.24 petaflops, which is 11.84% of its peak performance. The obtained seismograms with an accuracy of 1.2?s for the entire globe should help us to better understand rupture mechanisms of devastating earthquakes.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "SAGE Publications", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1177/1094342016632596"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1741-2846", "subitem_source_identifier_type": "EISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Seiji Tsuboi", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Kazuto Ando", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Takayuki Miyoshi", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Daniel Peter", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Dimitri Komatitsch", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Jeroen Tromp", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "A 1.8 trillion degrees-of-freedom, 1.24 petaflops global seismic wave simulation on the K computer", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "A 1.8 trillion degrees-of-freedom, 1.24 petaflops global seismic wave simulation on the K computer", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4979", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4979", "relation": {}, "relation_version_is_last": true, "title": ["A 1.8 trillion degrees-of-freedom, 1.24 petaflops global seismic wave simulation on the K computer"], "weko_shared_id": -1}