{"created":"2023-06-20T14:38:51.352066+00:00","id":5482,"links":{},"metadata":{"_buckets":{"deposit":"b7b8296e-f073-48b9-963a-9a6e4ce6e21d"},"_deposit":{"created_by":1,"id":"5482","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"5482"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00005482","sets":["1887:1891","9:789:956:967"]},"author_link":["26579","26582","26581","26580","26574","26576","26577","26583","26575","26578"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Effect of seams on the aerodynamical properties of a hard baseball"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2009-02-27","bibliographicIssueDateType":"Issued"},"bibliographicVolumeNumber":"JAXA-SP-08-006","bibliographic_titles":[{"bibliographic_title":"宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集（第41回・第42回）"},{"bibliographic_title":"JAXA Special Publication: Proceedings of the 41st and 42nd JAXA Workshops on Investigation and Control of Boundar-Layer Transition","bibliographic_titleLang":"en"}]}]},"item_5_description_14":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"第42回「境界層遷移の解明と制御」研究会（2008年3月31日-4月1日）","subitem_description_type":"Other"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"Using a high-speed video camera, we measured the trajectory and rotation of a hard baseball thrown by a pitching machine. We determined the drag and lift coefficients of gyro-balls and backspin straight balls, by analyzing the video images. Two kinds of seam pattern, i.e., 2- and 4-seams, relative to the translational direction are investigated for 0.6 x 10(exp 5) < Re < 2.5 x 10(exp 5). The spin parameter (SP) is set to be 0.12, 0.23 and 0.35. The drag coefficient of a 4-seam gyro-ball decreases gradually with Re. In contrast, the drag coefficient of a 2-seam gyro-ball with SP = 0.12 and that with SP = 0.23, decrease in two steps, and their minima (about 0.2) are attained at Re = 2.2 x 10(exp 5) and 1.8 x 10(exp 5), respectively. The drag coefficient of a backspin straight ball with SP = 0.12 and that with SP = 0.23 attain their minima (about 0.3) at Re = 1.5 x 10(exp 5) and 1.35 x 10(exp 5), respectively. The lift coefficient of a backspin straight ball increases monotonically with Re, approaching a constant value 0.2 for Sp = 0.12, 0.25 for SP = 0.23, and 0.3 for SP = 0.35, respectively. No significant difference in the Re-dependence of the drag and lift coefficients is observed between 2- and 4-seams backspin straight balls.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0064237024","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: JAXA-SP-08-006","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Japan Aerospace Exploration Agency (JAXA)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1349-113X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11984031","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"電気通信大学電子通信学研究科知能機械工学科"},{"subitem_text_value":"電気通信大学電子通信学研究科知能機械工学科"},{"subitem_text_value":"電気通信大学電子通信学研究科知能機械工学科"},{"subitem_text_value":"電気通信大学電子通信学研究科知能機械工学科"},{"subitem_text_value":"理化学研究所情報基盤センター"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications"},{"subitem_text_language":"en","subitem_text_value":"Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications"},{"subitem_text_language":"en","subitem_text_value":"Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications"},{"subitem_text_language":"en","subitem_text_value":"Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications"},{"subitem_text_language":"en","subitem_text_value":"Advanced Computing and Communication Center, Institute of Physical and Chemical Research (RIKEN)"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"横山, 佳之"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"高見, 圭太"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"田中, 潤一郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"宮嵜, 武"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"姫野, 龍太郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yokoyama, Yoshiyuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Takami, Keita","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tanaka, Junichiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Miyazaki, Takeshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Himeno, Ryutaro","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-16"}],"displaytype":"detail","filename":"64237024.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"64237024.pdf","url":"https://jaxa.repo.nii.ac.jp/record/5482/files/64237024.pdf"},"version_id":"04391714-4281-4193-b949-b0adac123057"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"hard-baseball, drag coefficient, lift coefficient, gyro-ball, backspin straight ball, drag crisis, negative magnus effect","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"硬式野球ボールの空力特性に対する縫目の影響","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"硬式野球ボールの空力特性に対する縫目の影響"}]},"item_type_id":"5","owner":"1","path":["967","1891"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"5482","relation_version_is_last":true,"title":["硬式野球ボールの空力特性に対する縫目の影響"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-21T08:14:05.051940+00:00"}