{"created":"2023-06-20T15:17:34.516696+00:00","id":11487,"links":{},"metadata":{"_buckets":{"deposit":"ef2f16d5-88ed-41ca-85ee-adb68f0635b3"},"_deposit":{"created_by":20,"id":"11487","owners":[20],"pid":{"revision_id":0,"type":"depid","value":"11487"},"status":"published"},"_oai":{"id":"oai:nifs-repository.repo.nii.ac.jp:00011487","sets":["6:7"]},"author_link":["67786","127789","127790","123513"],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-06-10","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"Special Issue 2","bibliographicPageStart":"3401083","bibliographicVolumeNumber":"9","bibliographic_titles":[{"bibliographic_title":"Plasma and Fusion Research "}]}]},"item_10001_description_4":{"attribute_name":"著者ID","attribute_value_mlt":[{"subitem_description":"0000-0002-6708-7468","subitem_description_type":"Other"}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We propose a TOKI (Time Order, Kinetic, and Irreversible) compression method for recording smooth trajectories of particles from PIC (electromagnetic particle-in-cell) simulations. In a TOKI compression, instead of storing entire time sequences of particle positions, we store particle trajectories in terms of coefficients of approximating polynomials. In the current implementation, these coefficients are determined either by the least-squares method or by the Chebyshev approximation formula to obtain quasi-minimax polynomials. In this paper, we present the technique of TOKI compression and compare it with other lossy compression schemes, such as XTC. Comparisons are made using data from a PIC simulation for 150,000 electrons and 150,000 ions. For smooth trajectories, the compression ratio by TOKI is better than that by the XTC format. However, for ballistic trajectories, the compression ratio by TOKI is not good because of the significant overhead in storing raw values of trajectories. We also found that the compression efficiency for ion trajectories is better than that for electron trajectories. This is attributed to different characteristic time scales of motions due to the difference in mass. We expect that the behavior of the compression ratio in TOKI can be used to characterize motions of plasma particles. ","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"The Japan Society of Plasma Science and Nuclear Fusion Research "}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1585/pfr.9.3401083 ","subitem_relation_type_select":"DOI"}}]},"item_10001_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"Publisher version"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1585/pfr.9.3401083","subitem_relation_type_select":"DOI"}}]},"item_10001_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"(c) 2014 The Japan Society of Plasma Science and Nuclear Fusion Research "}]},"item_10001_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA12346675","subitem_source_identifier_type":"NCID"}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1880-6821","subitem_source_identifier_type":"ISSN"}]},"item_10001_text_23":{"attribute_name":"NAIS","attribute_value_mlt":[{"subitem_text_value":"8565"}]},"item_10001_text_25":{"attribute_name":"書誌的事項","attribute_value_mlt":[{"subitem_text_value":"the 23rd International Toki Conference on Large-scale Simulation and Fusion Science"}]},"item_10001_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"HAGITA, Katsumi"}],"nameIdentifiers":[{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":""}],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"OHTANI,  Hiroaki"}],"familyNames":[{}],"givenNames":[{}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"KATO, Tsunehiko"}],"nameIdentifiers":[{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":""}],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"ISHIGURO,  Seiji"}],"familyNames":[{}],"givenNames":[{}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2022-07-26"}],"displaytype":"detail","filename":"8565_PFR.pdf","filesize":[{"value":"255.7 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"8565_PFR","url":"https://nifs-repository.repo.nii.ac.jp/record/11487/files/8565_PFR.pdf"},"version_id":"7e7403e7-8741-471d-a5a1-914b0799faa2"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"TOKI compression","subitem_subject_scheme":"Other"},{"subitem_subject":"plasma particle simulation","subitem_subject_scheme":"Other"},{"subitem_subject":"visualization","subitem_subject_scheme":"Other"},{"subitem_subject":"smooth animation","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"TOKI Compression for Plasma Particle Simulations","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"TOKI Compression for Plasma Particle Simulations"}]},"item_type_id":"10001","owner":"20","path":["7"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-07-26"},"publish_date":"2022-07-26","publish_status":"0","recid":"11487","relation_version_is_last":true,"title":["TOKI Compression for Plasma Particle Simulations"],"weko_creator_id":"20","weko_shared_id":-1},"updated":"2023-09-26T05:15:29.938173+00:00"}