{"created":"2021-03-01T06:07:15.320930+00:00","id":3496,"links":{},"metadata":{"_buckets":{"deposit":"a079f9d7-5b72-49a0-a470-0e0c1aa1401c"},"_deposit":{"id":"3496","owners":[],"pid":{"revision_id":0,"type":"depid","value":"3496"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00003496","sets":["423:424:425","453:454"]},"item_5_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Propagation Characteristics of the Dominant Mode in Tunnels with Elliptical Cross Section"}]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1981-09","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"9","bibliographicPageEnd":"1038","bibliographicPageStart":"1032","bibliographicVolumeNumber":"J64-B","bibliographic_titles":[{"bibliographic_title":"電子通信学会論文誌. B"},{"bibliographic_title":"電子通信学会論文誌. B","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"この論文はトンネル，地下街などにおける無線通信の電波伝搬特性に対する基礎資料を得る目的で，これらの空間を損失媒質で囲まれた中空だ円筒でモデル化し，その中における実用上最も重要な基本モードの伝搬特性を厳密に調べたものである．だ円筒を取り囲む媒質の導電率が高ければ，摂動法を用いて伝搬特性が解明できるが，コンクリートや岩のような導電率の低い媒質に対してこの方法は適用できない．ここでは，伝搬定数の満たすべき特性方程式を導き，それを数値計算で解くことにより伝搬定数を得ている．だ円断面は二つの対称軸を有するため，奇，偶の基本モードが存在するが，実際のトンネルに近い中空だ円筒において，両モードの減衰定数は周波数の増加と共に減少すること，及び，偶モードより奇モードの方が減衰が少ないことを具体的な数値例で示した．又，媒質定数によって減衰量がどのように変化するかを調べ，導電率よりも誘電率に大きく依存することを明らかにした．更に，モデル実験によって減衰特性を実測し，解析結果とよく一致していることを確認している．","subitem_description_type":"Abstract"}]},"item_5_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"19","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Yamaguchi, Yoshio"}]},{"nameIdentifiers":[{"nameIdentifier":"43339","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Shimizu, Tomio"}]},{"nameIdentifiers":[{"nameIdentifier":"43340","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Abe, Takeo"}]}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"電子情報通信学会"}]},"item_5_relation_31":{"attribute_name":"異版である","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://www.ieice.org/jpn/trans_online/","subitem_relation_type_select":"URI"}}]},"item_5_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"copyright(C)1981 IEICE"}]},"item_5_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_5_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN0015328X","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03736105","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"山口, 芳雄"}],"nameIdentifiers":[{"nameIdentifier":"19","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"清水, 富男"}],"nameIdentifiers":[{"nameIdentifier":"43336","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"阿部, 武雄"}],"nameIdentifiers":[{"nameIdentifier":"43337","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":"2019-07-30"}],"displaytype":"detail","filename":"J64-B_9_1032-1038.pdf","filesize":[{"value":"445.7 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"J64-B_9_1032-1038.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/3496/files/J64-B_9_1032-1038.pdf"},"version_id":"ce929ccf-0a67-48ef-a0e4-2ca0ef9ab8ae"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"だ円断面をもつトンネル内の基本波の伝搬特性","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"だ円断面をもつトンネル内の基本波の伝搬特性"},{"subitem_title":"だ円断面をもつトンネル内の基本波の伝搬特性","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","425"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-02-18"},"publish_date":"2013-02-18","publish_status":"0","recid":"3496","relation_version_is_last":true,"title":["だ円断面をもつトンネル内の基本波の伝搬特性"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:36:37.293273+00:00"}