{"_buckets": {"deposit": "758da745-a578-4579-b018-437a2c66da3d"}, "_deposit": {"id": "7049", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "7049"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00007049", "sets": ["872"]}, "author_link": ["18990", "18991", "18992", "18993", "18994", "18995"], "item_1615768549627": {"attribute_name": "出版タイプ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_970fb48d4fbd8a85", "subitem_version_type": "VoR"}]}, "item_9_alternative_title_19": {"attribute_name": "その他のタイトル", "attribute_value_mlt": [{"subitem_alternative_title": "The maximum resisting force and work done by a cut tree crown passing through the crown of standing trees", "subitem_alternative_title_language": "en"}]}, "item_9_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1996-12", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "83", "bibliographicPageStart": "69", "bibliographicVolumeNumber": "15", "bibliographic_titles": [{"bibliographic_title": "名古屋大学農学部演習林報告", "bibliographic_titleLang": "ja"}]}]}, "item_9_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "伐採に際し、伐倒木の樹冠が残存木の樹冠に妨げられて自由な動きができず、作業の障害となることが多い。この樹冠同士の接触の現象は複雑な仕組みをもち、またさまざまな条件因子の影響を受けている。例えばかかり木の発生頻度は、樹冠を構成する枝の形状、材質、伸長方向、小枝や葉の状態、そして立木密度など数多くの物理的因子に関係することが知られている。ここに挙げたような因子が、伐倒時の樹冠同士の接触と通過の過程にどのような影響を及ぼしているかを解析した。またこの解析結果に基づいて、樹冠接触時の最大抵抗力や通過に要する仕事を推定するための基本式を導いた。樹冠接触時の抵抗力は、基本的には樹冠を構成する枝のたわみに伴って生ずるものである。そこで枝のたわみの抵抗力を基礎として最大抵抗力Fmを求める式を提示した。F_m＝η(1＋μ)f_bm ここでηは枝と枝が接触するときの接触効率、μは接触摩擦係数、そしてf_bmは接触区間における枝のたわみ抵抗力の合計の最大値である。通過仕事W_tも下のように同じ形式の式で表した。ただしw_btは樹冠接触に関わる全ての枝のたわみ仕事の合計である。", "subitem_description_language": "ja", "subitem_description_type": "Abstract"}, {"subitem_description": "W_t = η(1＋μ)w_bt The frequency of occurrence of tree hang-ups depends on physical characteristics such as the size, length, quality, and inclination of branches as well as the nature of branchlets and leaves. By analyzing the influence of these factors on the crown contact-phenomenon, we introduced the formulas to estimate the maximum resisting force and work done when a cut tree crown passes through the crown of standing trees. Since the resisting force is essentially and mainly based on the bending force of each branch, the maximum resisting force F_m is derived from the branch bending force as F_m = η(1＋μ)f_bmwhere f_bm is the maximum force which will be caused by bent branches during the crown contact, and η and μ are the branch contact efficiency and frictional coefficient between two crowns, respectively. In the same manner, the work done W_t can be expressed as W_t = η(1＋μ)w_bt where w_bt is the total bending work of all branches involved in the contact.", "subitem_description_language": "en", "subitem_description_type": "Abstract"}]}, "item_9_description_5": {"attribute_name": "内容記述", "attribute_value_mlt": [{"subitem_description": "農林水産研究情報センターで作成したPDFファイルを使用している。", "subitem_description_language": "ja", "subitem_description_type": "Other"}]}, "item_9_identifier_60": {"attribute_name": "URI", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/2237/8723"}]}, "item_9_identifier_registration": {"attribute_name": "ID登録", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.18999/bulnuf.15.69", "subitem_identifier_reg_type": "JaLC"}]}, "item_9_publisher_32": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "名古屋大学農学部付属演習林", "subitem_publisher_language": "ja"}]}, "item_9_relation_43": {"attribute_name": 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"creatorNameLang": "ja"}], "nameIdentifiers": [{"nameIdentifier": "18990", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "MORIOKA, Noboru", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "18991", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "近藤, 稔", "creatorNameLang": "ja"}], "nameIdentifiers": [{"nameIdentifier": "18992", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "KONDO, Minoru", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "18993", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "小木曽, 謙治", "creatorNameLang": "ja"}], "nameIdentifiers": [{"nameIdentifier": "18994", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "KOGISO, Kenji", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "18995", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": 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"tree crown", "subitem_subject_scheme": "Other"}, {"subitem_subject": "thinning operation", "subitem_subject_scheme": "Other"}, {"subitem_subject": "tree hang-up", "subitem_subject_scheme": "Other"}, {"subitem_subject": "branch deflection", "subitem_subject_scheme": "Other"}, {"subitem_subject": "frictional resistance", "subitem_subject_scheme": "Other"}]}, "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": "伐採木樹冠が残存木樹冠の間を通過するときの最大抵抗力と通過仕事", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "伐採木樹冠が残存木樹冠の間を通過するときの最大抵抗力と通過仕事", "subitem_title_language": "ja"}]}, "item_type_id": "9", "owner": "1", "path": ["872"], "permalink_uri": "https://doi.org/10.18999/bulnuf.15.69", "pubdate": {"attribute_name": "PubDate", 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