{"_buckets": {"deposit": "e4d0356a-bf30-4c10-a5c3-0d1ccd95bcab"}, "_deposit": {"id": "33667", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "33667"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00033667", "sets": []}, "author_link": ["131521", "131520"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "21. \u3042\u308b\u5468\u671f\u69cb\u9020\u3092\u6709\u3059\u308b\u4e0d\u5747\u8cea\u5a92\u8cea\u3092\u4f1d\u308f\u308b\u5f3e\u6027\u6ce2"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1964-12-25", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "447", "bibliographicPageStart": "427", "bibliographicVolumeNumber": "42", "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": "The attenuation of seismic waves propagated in a heterogeneous medium is investigated. Heterogeneity of the medium is represented by the velocity distribution alone and the structure under consideration is expressed in Fourier cosine series. In this proplem the differential equation is of Hill\u0027s type, and conditions of instabilityare discussed. Since the unstable solutions obtained are of the standing waves, some modification and reformation for discussing the stability of the progressive waves are made. It is concluded that the wave amplitude with wave length \u03bbn isaffected by the structural component with wave length Ln=\u03bbn/2 and is independent, of the other components, and that the function of the apparent attenuation for the specified wave amplitude is of hyperbolic secant but not of exponential. On the other hand, the phase of this specific wave is shifted by every component of the structure. In addition, the phase shift of waves passing through the medium is negligibly small; the phase velocity is apparently fixed for all frequencies. A similar problem will arise in that of surface wave propagation along a rough surface. In the appendix, Hill\u0027s equation is solved in forms convenient in discussing the stability of its solution.", "subitem_description_type": "Abstract"}, {"subitem_description": "\u901f\u5ea6\u306e\u5206\u5e03\u304cc0(1+\u03a3r0r=1\u03b5rcos2r\u03b3x)\u3067\u8868\u308f\u3055\u308c\u308b\u4e0d\u5747\u8cea\u5a92\u8cea\u3092\u4f1d\u308f\u308b\u6ce2\u52d5\u306e\u4f1d\u642c\u3092\u8abf\u3079\u305f.\u4f1d\u642c\u5f84\u8def\u306e\u4e0d\u5747\u8cea\u6027\u3092\u30d5\u30fc\u30ea\u30a8\u89e3\u6790\u3059\u308b\u3068\u3053\u306e\u3088\u3046\u306a\u901f\u5ea6\u5206\u5e03\u306b\u7f6e\u304d\u304b\u3048\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3042\u308d\u3046.\u307e\u305f,\u540c\u69d8\u306a\u554f\u984c\u306f\u5e73\u3089\u3067\u306a\u3044\u5730\u5f62\u3092\u6a2a\u5207\u308b\u8868\u9762\u6ce2\u306e\u4f1d\u642c\u3068\u7d50\u3073\u3064\u3051\u3066\u8003\u3048\u308b\u3053\u3068\u3082\u3067\u304d\u308b.\u3053\u306e\u3088\u3046\u306a\u5a92\u8cea\u306b\u304a\u3051\u308b\u6ce2\u52d5\u65b9\u7a0b\u5f0f\u306f\u30d2\u30eb\u306e\u65b9\u7a0b\u5f0f\u3067\u66f8\u304b\u308c,\u305d\u306e\u89e3\u306e\u5b89\u5b9a\u6027\u3092\u8b70\u8ad6\u3059\u308b\u305f\u3081\u306bWhittaker\u3084Ince\u3089\u306b\u3088\u3064\u3066\u4e0e\u3048\u3089\u308c\u305f\u89e3\u3092\u5c11\u3057\u4e00\u822c\u5316\u3057\u3066\u7528\u3044\u305f.", "subitem_description_type": "Abstract"}]}, "item_4_full_name_3": {"attribute_name": "\u8457\u8005\u5225\u540d", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "131521", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "\u97f3\u7530, \u529f"}]}]}, "item_4_identifier_registration": {"attribute_name": "ID\u767b\u9332", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.15083/0000033667", "subitem_identifier_reg_type": "JaLC"}]}, "item_4_publisher_20": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u6771\u4eac\u5927\u5b66\u5730\u9707\u7814\u7a76\u6240"}]}, "item_4_source_id_10": {"attribute_name": "\u66f8\u8a8c\u30ec\u30b3\u30fc\u30c9ID", "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": "\u65e5\u672c\u5341\u9032\u5206\u985e\u6cd5", "attribute_value_mlt": [{"subitem_subject": "453", "subitem_subject_scheme": "NDC"}]}, "item_4_text_21": {"attribute_name": "\u51fa\u7248\u8005\u5225\u540d", "attribute_value_mlt": [{"subitem_text_value": "Earthquake Research Institute, University of Tokyo"}]}, "item_4_text_34": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"subitem_text_value": "Departmental Bulletin Paper"}]}, "item_4_text_4": {"attribute_name": "\u8457\u8005\u6240\u5c5e", "attribute_value_mlt": [{"subitem_text_value": "Earthquake Research Institute"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "ONDA, Isao"}], "nameIdentifiers": [{"nameIdentifier": "131520", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2017-06-26"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "ji0423002.pdf", "filesize": [{"value": "1.0 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1000000.0, "url": {"label": "ji0423002.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/33667/files/ji0423002.pdf"}, "version_id": "1a6ef848-2d8e-4d90-a862-753fda3e9fda"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "21. Propagation and Apparent Attenuation of Elastic Waves in a Heterogeneous Medium with Certain Periodic Structures", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "21. Propagation and Apparent Attenuation of Elastic Waves in a Heterogeneous Medium with Certain Periodic Structures", "subitem_title_language": "en"}]}, "item_type_id": "4", "owner": "1", "path": ["80/4535/4957/4961", "9/504/4538/4959/4962"], "permalink_uri": "https://doi.org/10.15083/0000033667", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "33667", "relation": {}, "relation_version_is_last": true, "title": ["21. Propagation and Apparent Attenuation of Elastic Waves in a Heterogeneous Medium with Certain Periodic Structures"], "weko_shared_id": -1}