{"created":"2021-03-01T06:53:28.929577+00:00","id":34571,"links":{},"metadata":{"_buckets":{"deposit":"f07f5e30-7d9f-4feb-98ba-c78d7946193f"},"_deposit":{"id":"34571","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"34571"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00034571","sets":["80:4535:5177:5185","9:504:4538:5179:5186"]},"author_link":["134055","134054"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"12. 砂の中を傳播する彈性波の速度"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1938-03-20","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"144","bibliographicPageStart":"131","bibliographicVolumeNumber":"16","bibliographic_titles":[{"bibliographic_title":"東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University"}]}]},"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":"We investigated the velocities of elastic waves in four kinds of sand. The relation between density and moisture content was also studied. The velocities of elastic waves in sand were obtained by means of the vibration method. Moreover, we succeeded in ascertaining the elastic wave-velocities of granular substances, such as sand, by using cellophane. It was ascertained that the elastic properties are greatly affected by the closeness of packing, the moisture content, and the presence of adherent colloidal particles in the sand. The velocities decrease with increase in moisture content or with increase in porosity. The transverse wave-velocities decrease somewhat rapidly with increase of moisture content, while the longitudinal wave-velocities of some sands increase with moisture content exceeded 19 per cent. We were thus able to observe the transitional state of sand from the ordinary solid state to the liquid state by virtue of the increasing water in the sand. The velocities through the finer grained sands seem to be greater than those through the coarse grained sands. Finally, the elastic constants of the sands were determined by the assumption that formulae similar to that of the elastic theory could be applied. These studies on the properties of granular substances are being continued, and the results will be discussed a future issue of the Bulletin. In conclusion, my sincerest thanks are due to Professor Mishio Ishimoto for his kind guidance and encouragement, and also to Dr. T. Watanabe, by whose kind guidance the mechanical analysis of the sands which were used in the present experiments was carried out.","subitem_description_type":"Abstract"},{"subitem_description":"此の論文には砂の彈性的性質，特に砂の如き粒狀構造物體の中を傳播する憚性波の速度に就いて實驗した結果が述べてある．此の研究は今迄しばしば述べた如き物質の彈性的性質に對する研究の續きである．實驗には粒徑の異つた4種類の砂を選んだ．今囘の實驗方法は前囘と全く同様であり，且つ實驗物體もその形狀を圓壔形となした事は前囘と同じである．砂の如き粒狀體の物體を圓壔形に作る場合には，砂が適度度に濕つて居ればよいが，或程度以上に濕つて居る場合や全く乾燥して居る場合などに於ては砂を圓壔形にする事が出來ない．斯様な場合にはセロフアン紙を用ひて圓壔を作りその中に砂を詰めて實驗を行つた．","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"134055","nameIdentifierScheme":"WEKO"}],"names":[{"name":"飯田, 汲事"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000034571","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京帝国大学地震研究所"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00029699","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, Tokyo Imperial University"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"Earthquake Research Institute"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Iida, Kumizi"}],"nameIdentifiers":[{"nameIdentifier":"134054","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":"ji0161012.pdf","filesize":[{"value":"930.2 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0161012.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/34571/files/ji0161012.pdf"},"version_id":"6b8ea80e-b249-46aa-833b-c111ea2136d3"}]},"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":"12, The Velocity of Elastic Waves in Sand","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"12, The Velocity of Elastic Waves in Sand","subitem_title_language":"en"}]},"item_type_id":"4","owner":"1","path":["5185","5186"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-06-06"},"publish_date":"2008-06-06","publish_status":"0","recid":"34571","relation_version_is_last":true,"title":["12, The Velocity of Elastic Waves in Sand"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T04:58:44.649127+00:00"}