{"created":"2021-03-01T06:52:43.974264+00:00","id":33897,"links":{},"metadata":{"_buckets":{"deposit":"6ad68a25-805a-4ce5-a7ab-e185355c60e9"},"_deposit":{"id":"33897","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"33897"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00033897","sets":["80:4535:5007:5015","9:504:4538:5009:5016"]},"author_link":["132199","132198"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"地球中間層による地磁気永年変化の減衰"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1959-05-15","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"32","bibliographicPageStart":"13","bibliographicVolumeNumber":"37","bibliographic_titles":[{"bibliographic_title":"東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"On the assumption that a time-dependent electric current sheet, at the core boundary, of which the magnetic potential is equivalent to that due to magnetic dipoles distributed at random, is the source of geomagnetic secular variations, the decrease in amplitudes of the secular variation through the mantle is discussed by taking the existence of the conducting core into account. The lower harmonic components damp out more conspicuously than the higher ones. The electrical conductivity of the mantle to cause an attenuation most compatible with that inferred from the observation ranges 4.5×10-10e.m.u.≦σ≦2.0×10-9e.m.u. at the depth of 2500km.","subitem_description_type":"Abstract"},{"subitem_description":"地磁気永年変化は,地球核表面を流れる電流の時間的変化によつて生ずると考えられている.磁気双極子がat randomに核表面に分布しているのと,等価な電流系を考え,その時間的変化が地表面で永年変化として観測されると仮定し,その電流系によつて地表面にできる磁気ポテンシャルが,地球中間層の電気伝導度を種々に変えることによつてどのように変化するかを求めた,中間層の電気伝導度を大きくしてゆくと,n=3迄では,低いharmonicの係数ほど,減衰度が大となり,実測より得られたポテンシャルの形にもつとも近いように,中間層の電気伝導度をきめると,2500km位の深さで4.5×1O-10e.m.u.≦σ≦2.0×10-9e.m.u.という値が得られた.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"132199","nameIdentifierScheme":"WEKO"}],"names":[{"name":"行武, 毅"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000033897","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学地震研究所"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162258","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00408972","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"453","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"Earthquake Research Institute,University of Tokyo"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学大学院地球物理学課程"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yukutake, Takesi"}],"nameIdentifiers":[{"nameIdentifier":"132198","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-27"}],"displaytype":"detail","filename":"ji0371002.pdf","filesize":[{"value":"917.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0371002.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/33897/files/ji0371002.pdf"},"version_id":"3b0a1d30-d5e4-40bf-8626-d4265653999d"}]},"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":"Attenuation of Geomagnetic Secular Veriation through the Conducting Mantle of the Earth","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Attenuation of Geomagnetic Secular Veriation through the Conducting Mantle of the Earth","subitem_title_language":"en"}]},"item_type_id":"4","owner":"1","path":["5015","5016"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-05-30"},"publish_date":"2008-05-30","publish_status":"0","recid":"33897","relation_version_is_last":true,"title":["Attenuation of Geomagnetic Secular Veriation through the Conducting Mantle of the Earth"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T04:58:14.369356+00:00"}