{"created":"2021-03-01T06:52:04.153251+00:00","id":33303,"links":{},"metadata":{"_buckets":{"deposit":"ebe1180c-b8ea-4301-a22e-0358e2ff79f7"},"_deposit":{"id":"33303","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"33303"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00033303","sets":["80:4535:4885:4889","9:504:4538:4887:4890"]},"author_link":["130026","130027","130024","130025"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"51. Construction of a Long Life Magnetic Tape Recorder and Some Features of Ocean-Bottom Seismograms"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1970-12-05","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"5","bibliographicPageEnd":"981","bibliographicPageStart":"967","bibliographicVolumeNumber":"48","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":"海底地震計用に,1000時間長期間記録用磁気テープレコーダーを開発し,実際に使用した.主な性能は次の通りである.(1)外型:240φ×286mm円筒型,(2)テープ走行:重ねリール方式,クローズドループ方式,(3)テープ:7号型リール,1800ft,1/4インチ巾,(4)テープスピード:0.006inch/sec(0.145mm/sec),(5)記録時間:1000時間連続,(6)チャンネル数:4,(7)記録方式:ダイレクトアナログ(DAR),(8)周波数特性:0.5Hz～10Hz,(9)ダイナミックレンヂ:30db以上(3Hzにて,(10)S/N比:24db以上(3Hz,0db=2vpp),(11)電源:12VDC,115mA,このデータレコーダーを1969年5月～6月白鳳丸による日本海溝海底地震観測において使用した.三陸沖水深約1000mの地点における約42日間繋留の全期間中正常に動作し,多数の地震を記録した.海底地震記録の特徴として次のようなことが認められた.(1)上下動にくらべて水平動の発震時が遅れる.遅れの量はOBS SAN-B点で約1.8秒,0BS Erimoで約1.2秒である.(2)水平動成分の振巾が上下動成分の振巾よりはるかに大きく,0BS SAN-B点では約5倍,0BS Erimoでは約2倍である.(3)上下動成分の方が水平動成分よりも卓越周波数が高い.(4)OBS SAN-B点の記録ではP-S間に顕著な相が現れる.(5)5600mの深海底の観測点でT相が多数観測された.一方,三陸沖の観測点SAN-Bでは1000mの海底にも拘らずT相は稀にしか観測されなかった.(6)地震波の伝播径路によってスペクトル構造に差が認められた.|A 1000 hrs magnetic tape recorder is developed and used for the ocean-bottom seismograph.  The main specifications are as follows:","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"130026","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hasegawa, Shuji"}]},{"nameIdentifiers":[{"nameIdentifier":"130027","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Nagumo, Shozaburo"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000033303","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":"東京大学理系大学院"},{"subitem_text_value":"地震研究所"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"長谷川, 周而"}],"nameIdentifiers":[{"nameIdentifier":"130024","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"南雲, 昭三郎"}],"nameIdentifiers":[{"nameIdentifier":"130025","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":"2017-06-26"}],"displaytype":"detail","filename":"ji0485016.pdf","filesize":[{"value":"1.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0485016.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/33303/files/ji0485016.pdf"},"version_id":"8741179b-a2d1-471a-b5b3-5b981c4ce52e"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"51.海底地震計用長期間磁気テープレコーダの試作および海底地震記録の特徴","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"51.海底地震計用長期間磁気テープレコーダの試作および海底地震記録の特徴","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"1","path":["4889","4890"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-05-30"},"publish_date":"2008-05-30","publish_status":"0","recid":"33303","relation_version_is_last":true,"title":["51.海底地震計用長期間磁気テープレコーダの試作および海底地震記録の特徴"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T04:08:59.773450+00:00"}