{"created":"2021-03-01T06:22:56.574747+00:00","id":19841,"links":{},"metadata":{"_buckets":{"deposit":"e4166c38-4aeb-4ea0-8ba6-4bd5581c29f6"},"_deposit":{"id":"19841","owners":[],"pid":{"revision_id":0,"type":"depid","value":"19841"},"status":"published"},"_oai":{"id":"oai:soar-ir.repo.nii.ac.jp:00019841","sets":["1169:1170"]},"author_link":["105565","105566","105567","105568"],"item_1628147817048":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_6_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-08-10","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageStart":"22","bibliographicVolumeNumber":"791","bibliographic_titles":[{"bibliographic_title":"ASTROPHYSICAL JOURNAL"}]}]},"item_6_description_20":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We analyze the three-dimensional anisotropy of the galactic cosmic ray (GCR) intensities observed independently with a muon detector at Nagoya in Japan and neutron monitors over four solar activity cycles. We clearly see the phase of the free-space diurnal anisotropy shifting toward earlier hours around solar activity minima in A > 0 epochs, due to the reduced anisotropy component parallel to the mean magnetic field. This component is consistent with a rigidity-independent spectrum, while the perpendicular anisotropy component increases with GCR rigidity. We suggest that this harder spectrum of the perpendicular component is due to contribution from the drift streaming. We find that the bi-directional latitudinal density gradient is positive in theA > 0 epoch, while it is negative in the A < 0 epoch, in agreement with the drift model prediction. The radial density gradient of GCRs, on the other hand, varies with a similar to 11 yr cycle with maxima (minima) in solar maximum (minimum) periods, but we find no significant difference between the radial gradients in the A > 0 and A < 0 epochs. The corresponding parallel mean free path is larger in A < 0 than in A > 0. We also find, however, that the parallel mean free path (radial gradient) appears to persistently increase (decrease) in the last three cycles of weakening solar activity. We suggest that simple differences between these parameters in A > 0 and A < 0 epochs are seriously biased by these long-term trends.","subitem_description_type":"Abstract"}]},"item_6_description_30":{"attribute_name":"資源タイプ（コンテンツの種類）","attribute_value_mlt":[{"subitem_description":"Article","subitem_description_type":"Other"}]},"item_6_description_5":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"ASTROPHYSICAL JOURNAL. 791(1):22 (2014)","subitem_description_type":"Other"}]},"item_6_link_3":{"attribute_name":"信州大学研究者総覧へのリンク","attribute_value_mlt":[{"subitem_link_text":"Munakata, K.","subitem_link_url":"http://soar-rd.shinshu-u.ac.jp/profile/ja.jaDeOUkh.html"},{"subitem_link_text":"Kato, C.","subitem_link_url":"http://soar-rd.shinshu-u.ac.jp/profile/ja.ONfFOUkh.html"}]},"item_6_link_67":{"attribute_name":"WoS","attribute_value_mlt":[{"subitem_link_url":"http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000339657700022"}]},"item_6_publisher_4":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IOP PUBLISHING LTD"}]},"item_6_relation_48":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"10.1088/0004-637X/791/1/22"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1088/0004-637X/791/1/22","subitem_relation_type_select":"DOI"}}]},"item_6_rights_62":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2014 The American Astronomical Society"}]},"item_6_source_id_35":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0004-637X","subitem_source_identifier_type":"ISSN"}]},"item_6_source_id_40":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00553242","subitem_source_identifier_type":"NCID"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Munakata, K."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kozai, M."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kato, C."}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kota, J."}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-05-10"}],"displaytype":"detail","filename":"Munakata_2014_ApJ_791_22.pdf","filesize":[{"value":"1.2 MB"}],"format":"application/pdf","licensefree":"© 2014 The American Astronomical Society","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Munakata_2014_ApJ_791_22.pdf","url":"https://soar-ir.repo.nii.ac.jp/record/19841/files/Munakata_2014_ApJ_791_22.pdf"},"version_id":"4a9dc477-14d4-481c-bbe9-dfe8846cb841"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"cosmic rays","subitem_subject_scheme":"Other"},{"subitem_subject":"methods: data analysis","subitem_subject_scheme":"Other"},{"subitem_subject":"Sun: heliosphere","subitem_subject_scheme":"Other"},{"subitem_subject":"Sun: magnetic fields","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":"LONG-TERM VARIATION OF THE SOLAR DIURNAL ANISOTROPY OF GALACTIC COSMIC RAYS OBSERVED WITH THE NAGOYA MULTI-DIRECTIONAL MUON DETECTOR","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"LONG-TERM VARIATION OF THE SOLAR DIURNAL ANISOTROPY OF GALACTIC COSMIC RAYS OBSERVED WITH THE NAGOYA MULTI-DIRECTIONAL MUON DETECTOR","subitem_title_language":"en"}]},"item_type_id":"6","owner":"1","path":["1170"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2018-05-10"},"publish_date":"2018-05-10","publish_status":"0","recid":"19841","relation_version_is_last":true,"title":["LONG-TERM VARIATION OF THE SOLAR DIURNAL ANISOTROPY OF GALACTIC COSMIC RAYS OBSERVED WITH THE NAGOYA MULTI-DIRECTIONAL MUON DETECTOR"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-14T04:16:21.722864+00:00"}