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Durind these navigations, the ship received the facsimile of weather reports, hydrographic information or news mainly from Tokyo, Pearl Harbor and Canberra. some results of the study on the receiving sensitivity and maintenance of tha apparatus are as follows. 1. There are some areas near the South-West Islands at about 1,000Km from Tokyo and near the Philippine Islands at about 2,000Km where the receiving sensitivity is very low with much noise and jamming in the F4 wave. This tendency is most remarkably revealed at about 1900 hours. 2. In a middle-sized ship, any receiving apparatus of higher quality than the NXA-340A type will be sufficiently practical even at a distance of over 10,000Km from Japan. 3. The F4 wave often undergoes much modulation caused by other waves showing little sharpness in the record even when the electric strength is large. 4. The time lag of synchronous signals is often caused by the variation of the electric source frequency due to over-load and by the maladjustment of the holder belt for the record pin.", "subitem_description_type": "Abstract"}, {"subitem_description": "1. 東京より1,000~2,000km前後の地域において波長の長い方のF4電波に混信雑音が多く,波長の短い方では感度が弱く時には非常に悪い結果が出た. それは19時頃が特に顕著である. 2. 中型船においてもNXA-340A型以上の性能の受画装置を装備すれば,本邦より10,000km以上の遠距離においても充分実用性がある. 3. F4電波は他波による変調を大きく受け,電界強度は高くても記録にシャープ性がない場合が多い. 4. 同期信号のズレは過負荷による電源周波数の変動と,記録針保持用ベルトの調整不良に起因することが多い様である.", "subitem_description_type": "Abstract"}]}, "item_3_description_64": {"attribute_name": "引用", "attribute_value_mlt": [{"subitem_description": "長崎大学水産学部研究報告, v.22, pp.109-114; 1967", "subitem_description_type": "Other"}]}, "item_3_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "35068", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Umezono, Shigeru"}]}]}, "item_3_publisher_33": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "長崎大学水産学部"}]}, "item_3_relation_29": {"attribute_name": "論文ID(NAID)", "attribute_value_mlt": [{"subitem_relation_type": "isIdenticalTo", "subitem_relation_type_id": {"subitem_relation_type_id_text": "40018181016", "subitem_relation_type_select": "NAID"}}]}, "item_3_source_id_10": {"attribute_name": "書誌レコードID", "attribute_value_mlt": [{"subitem_source_identifier": "AN00178473", "subitem_source_identifier_type": "NCID"}]}, "item_3_source_id_7": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "05471427", "subitem_source_identifier_type": "ISSN"}]}, "item_3_version_type_16": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_970fb48d4fbd8a85", "subitem_version_type": "VoR"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "梅園, 茂"}], "nameIdentifiers": [{"nameIdentifier": "35067", "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": "2020-12-21"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "suisan22_109.pdf", "filesize": [{"value": "4.2 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 4200000.0, "url": {"label": "suisan22_109.pdf", "url": "https://nagasaki-u.repo.nii.ac.jp/record/8667/files/suisan22_109.pdf"}, "version_id": "87228f94-1182-42ee-acb0-cefc4acf3c57"}]}, "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": "無線模写受画装置の受信感度測定結果と保守について", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "無線模写受画装置の受信感度測定結果と保守について"}]}, "item_type_id": "3", "owner": "2", "path": ["634"], "permalink_uri": "http://hdl.handle.net/10069/31454", "pubdate": {"attribute_name": "公開日", "attribute_value": "2013-04-23"}, "publish_date": "2013-04-23", "publish_status": "0", "recid": "8667", "relation": {}, "relation_version_is_last": true, "title": ["無線模写受画装置の受信感度測定結果と保守について"], "weko_shared_id": -1}
無線模写受画装置の受信感度測定結果と保守について
http://hdl.handle.net/10069/31454
http://hdl.handle.net/10069/31454e8c516fc-0fb7-4551-8ceb-6d01c5a60150
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2013-04-23 | |||||
タイトル | ||||||
タイトル | 無線模写受画装置の受信感度測定結果と保守について | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
梅園, 茂
× 梅園, 茂 |
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著者別名 | ||||||
姓名 | Umezono, Shigeru | |||||
その他のタイトル | ||||||
その他のタイトル | The Sensitivity Measurement and Maintenance of the Facsimile-receiving Apparatus | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "The Nagasaki-maru", a training ship of the Nagasaki Univereity Faculty of Fisheries, underwent three training navigations to Ceylon, Hawaii and Australia in each of the past three years, from July to September every year. Durind these navigations, the ship received the facsimile of weather reports, hydrographic information or news mainly from Tokyo, Pearl Harbor and Canberra. some results of the study on the receiving sensitivity and maintenance of tha apparatus are as follows. 1. There are some areas near the South-West Islands at about 1,000Km from Tokyo and near the Philippine Islands at about 2,000Km where the receiving sensitivity is very low with much noise and jamming in the F4 wave. This tendency is most remarkably revealed at about 1900 hours. 2. In a middle-sized ship, any receiving apparatus of higher quality than the NXA-340A type will be sufficiently practical even at a distance of over 10,000Km from Japan. 3. The F4 wave often undergoes much modulation caused by other waves showing little sharpness in the record even when the electric strength is large. 4. The time lag of synchronous signals is often caused by the variation of the electric source frequency due to over-load and by the maladjustment of the holder belt for the record pin. | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 1. 東京より1,000~2,000km前後の地域において波長の長い方のF4電波に混信雑音が多く,波長の短い方では感度が弱く時には非常に悪い結果が出た. それは19時頃が特に顕著である. 2. 中型船においてもNXA-340A型以上の性能の受画装置を装備すれば,本邦より10,000km以上の遠距離においても充分実用性がある. 3. F4電波は他波による変調を大きく受け,電界強度は高くても記録にシャープ性がない場合が多い. 4. 同期信号のズレは過負荷による電源周波数の変動と,記録針保持用ベルトの調整不良に起因することが多い様である. | |||||
書誌情報 |
長崎大学水産学部研究報告 en : Bulletin of the Faculty of Fisheries, Nagasaki University 巻 22, p. 109-114, 発行日 1967-03 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 05471427 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00178473 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
論文ID(NAID) | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | NAID | |||||
関連識別子 | 40018181016 | |||||
出版者 | ||||||
出版者 | 長崎大学水産学部 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 長崎大学水産学部研究報告, v.22, pp.109-114; 1967 |