{"created":"2023-07-25T11:01:59.449810+00:00","id":4136,"links":{},"metadata":{"_buckets":{"deposit":"a4e3cfa3-9ec2-4f90-ba5f-35be62520e33"},"_deposit":{"created_by":4,"id":"4136","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"4136"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00004136","sets":["1259:1260:1261:536:542"]},"author_link":["7693","44843"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1993-02","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"41","bibliographicPageStart":"36","bibliographicVolumeNumber":"6","bibliographic_titles":[{"bibliographic_title":"Proceedings of the NIPR Symposium on Upper Atmosphere Physics"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Ohtaka,Kazuhiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tanaka,Takashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_1_description_1":{"attribute_name":"ページ属性","attribute_value_mlt":[{"subitem_description":"P(論文)","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"Long term variations of radio auroral activity are investigated from auroral radar data obtained at Syowa Station during 1978-1990. The diurnal variation of radio auroral activity shows a maximum in the post-midnight period with a small peak in the evening. Similar to the case of magnetic activity, the occurrence rate of radio aurora shows semi-annual variations with summer (December) and winter (June) time minimums. For post-midnight radio aurora, summer minimums are more pronounced than winter minimums. The magnetic activity controls the occurrence of evening time radio aurora more notably than post-midnight radio aurora. For the solar cycle variation, a double-peaked modulation is seen during 11-year sunspot cycle, with a major peak in the declining phase of the sunspot cycle and a secondary peak in the increasing phase.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00004136","subitem_identifier_reg_type":"JaLC"}]},"item_1_publisher_22":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"National Institute of Polar Research"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA10756224","subitem_source_identifier_type":"NCID"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Communication Research Laboratory/Communication Research Laboratory"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1993-02-01"}],"displaytype":"detail","filename":"KJ00000036067.pdf","filesize":[{"value":"537.9 kB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000036067","url":"https://nipr.repo.nii.ac.jp/record/4136/files/KJ00000036067.pdf"},"version_id":"472da408-a8df-41e0-97d9-37c7bb9e9888"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Long term variations of radio auroral activity","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Long term variations of radio auroral activity"}]},"item_type_id":"1","owner":"4","path":["542"],"pubdate":{"attribute_name":"公開日","attribute_value":"1993-02-01"},"publish_date":"1993-02-01","publish_status":"0","recid":"4136","relation_version_is_last":true,"title":["Long term variations of radio auroral activity"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:23:28.720010+00:00"}