{"_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": []}, "author_link": ["132199", "132198"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "\u5730\u7403\u4e2d\u9593\u5c64\u306b\u3088\u308b\u5730\u78c1\u6c17\u6c38\u5e74\u5909\u5316\u306e\u6e1b\u8870"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1959-05-15", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "32", "bibliographicPageStart": "13", "bibliographicVolumeNumber": "37", "bibliographic_titles": [{"bibliographic_title": "\u6771\u4eac\u5927\u5b78\u5730\u9707\u7814\u7a76\u6240\u5f59\u5831 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]}, "item_4_description_13": {"attribute_name": "\u30d5\u30a9\u30fc\u30de\u30c3\u30c8", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_4_description_5": {"attribute_name": "\u6284\u9332", "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\u00d710-10e.m.u.\u2266\u03c3\u22662.0\u00d710-9e.m.u. at the depth of 2500km.", "subitem_description_type": "Abstract"}, {"subitem_description": "\u5730\u78c1\u6c17\u6c38\u5e74\u5909\u5316\u306f,\u5730\u7403\u6838\u8868\u9762\u3092\u6d41\u308c\u308b\u96fb\u6d41\u306e\u6642\u9593\u7684\u5909\u5316\u306b\u3088\u3064\u3066\u751f\u305a\u308b\u3068\u8003\u3048\u3089\u308c\u3066\u3044\u308b.\u78c1\u6c17\u53cc\u6975\u5b50\u304cat 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