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  • 飯高 勇之助
    日本水産学会誌
    1955年 21 巻 7 号 459-462
    発行日: 1955/11/25
    公開日: 2008/02/29
    ジャーナル フリー
    As the third step in the experimental studies of the purse seine in the stratified layer current*, a series of model experiments was made with the purpose of investigating the timely change of the tension of the purse line and the shape of the net in the coarse of pursing opera ?? ion. The model gear is the same as was used in the previous experiments 2). The pursing apparatus and the tension selfrecorder of the purse line were specially designed (Fig. 1). In the two cases; A, when the bottom margin of the net has sunk completely and B, when it is in course of sinking, the pursing was begun and then the tension was selfrecorded (Plate 1), at the same time, the transformation of the net was photograghed (Plate 2).
    As the results of this experiment, it was observed that in the case A, the tension of the purse line begins to act as soon as the pursing begins (Fig. 2), but in the case of B, it does not act untill the first 1/6 stage of pursing procedure is finished, and then it increases sharply (Fig. 3). After the first 1/2 stage, the changes of tension in both cases take the same pattern (Fig. 4). The case B was considered to be more dangerous than the case A for the occurrence of kankui**.
  • 辛 鍾根, 今井 健彦, 不破 茂, 石崎 宗周
    日本水産学会誌
    1999年 65 巻 1 号 33-41
    発行日: 1999/01/15
    公開日: 2008/02/01
    ジャーナル フリー
    船尾式まき網の基本設計を最終目的とし, 縮結の異なる5種類(E=0.5,0.6,0.7,0.8,0.9)の有嚢まき網の単純模型網を用い, 静水時における網の沈降動態および流れを与えた時の網の流体抵抗と網裾開口部の面積変化について調べた。沈子綱の沈降速度は縮結と測定点によって異なった特性を示した。沈降終了時の網裾の到達水深はE=0.9が最も深い値を示したが, 設計深さにほぼ等しい深さが得られたのはE=0.7とE=0.8だった。網裾の開口部がほぼ閉じるまでの網の移動距離はE=0.8以外には大きな差がなかった。これらの結果を総合すると, 船尾式まき網の縮結としてE=0.7が最も適していると判断される。
  • 石狩湾におけるサバ群の去来状況について
    川上 猛雄
    日本水産学会誌
    1962年 28 巻 12 号 1179-1183
    発行日: 1962年
    公開日: 2008/02/29
    ジャーナル フリー
    Movement of the mackerels has been investigated on the basis of catch data provided by the purse seiners having operated on the Ishikari bay insummer seasons between 1951 and 1954. According to the investigation, it is found that the mackerels aggregate into several subschools. These subschools enter one after another into the fishing ground at an interval of about seven days, which corresponds to the duration between waxing and waning of the moon. Annual change is found in regard of arer and time, in which the earliest subschool for the year appeared. The subschool separates into two or more parts or join with the other, probably depending upon the environmental conditions. It is believed that the environments affect duration of time, for which each subgroup stays in the fishing ground.
  • 田中 豊治
    地理学評論
    1955年 28 巻 4 号 159-170
    発行日: 1955/04/01
    公開日: 2008/12/24
    ジャーナル フリー
    The author studied the modernization of fishing industry in the San-in district and the influence of the fishing undertaken by enterprising capitalists on the minor coastal fishing. The results may be summerized as follows:
    1. The medium trawler, the horse-mackerel and mackerel purse seine and the sardine purse seine are to be regarded as the capitalistic in this district.
    2. The trawl fishery was established in both Tajima coast and Iwaini coast about 1930. Trawlers went to fishing towards the southeastern coast of Shikhote-Alin (Brimoskaya). Returning back to this seaside after the war II, they get 30% of the total haul in the district.
    3. The purse seine fishery, originated in Wakasa province, had-remained too oldfahioned to assure a good haul till 1945. But the improvement in fishing methods by being furnished with fish detector, rador and wireless has brought about a rapid increase in the catch amounting to over 50% of the total
    4. As the fishing grounds are lying near to each other and the fisting objects are the same, the coastal fishing has been gradually compelled to suffer from the oppression of the trawl and the seine fishery with greater capital. and superior shill. Hence the decline of the coastal fishing and the disintegration of the economy of the fishing villages.
    5. At the same time, comb-out of the fishing ports has been made. The port lying nearer from the fishing grounds, with better facilities for transpo-rtation and backed up with a bigger market has noly thrived. Now, Sakai and Hamada are the two central ports of the capitalistic fishing and the principal markets of the haul in this district.
  • 平賀 裕子, 渡邉 千之, 隅岡 正昭
    日本消化器内視鏡学会雑誌
    2017年 59 巻 2 号 205-206
    発行日: 2017年
    公開日: 2017/02/20
    ジャーナル フリー HTML
    電子付録
  • 辛 鍾根, 今井 健彦, 不破 茂, 石崎 宗周
    日本水産学会誌
    1998年 64 巻 5 号 759-767
    発行日: 1998/09/15
    公開日: 2008/02/29
    ジャーナル フリー
    The purpose of this study is to develop a net design for the stern fishing system of surrounding net using a lampara net. First, experiments were carried out using the model lampara net on the sinking motion under static water condition, and on the closing characteristics of the opening area on the lead line and side shape of the model net under the flow of water.
    The sinking speed of the model net was different according to the measuring point on the lead line. The depth of the lead line gradually became shallow as the flow velocity increased. The closed time of the opening area on the lead line was different according to the given flow velocity. When the model net moved about the same length of the float line, the opening area on the lead line was almost closed.
  • 金子 あき子, チョウ サンサン, 大島 一二
    農業市場研究
    2015年 24 巻 2 号 32-37
    発行日: 2015/09/30
    公開日: 2020/06/22
    ジャーナル フリー
    This paper focuses on LT company's Chinese domestic sales strategies. The LT company, which handles frozen processed soy products, is a local subsidiary of the food processing company F-Corporation and was founded in Laiyang city, Shandong province in China in 1995. At first, the LT company exported frozen processed soy products such as tofu, soy milk skin and rice cakes wrapped in fried tofu, only to Japan. However, at present, LT company is rapidly increasing its sales of frozen processed soy products in China, South Korea and Southeast Asia. Its major sales strategies include: selection of high quality soybeans; expanding sales to Japanese restaurants in Asian markets; the development of new products such as vegetables and meats wrapped in fried tofu; and targeting specific markets such as Chinese-style hot-pot restaurants.
  • 田中 豊治
    地理学評論
    1954年 27 巻 5 号 203-212
    発行日: 1954/05/25
    公開日: 2008/12/24
    ジャーナル フリー
    The fishing industry of Oki Island, an isolated islandain the Sea of Japan, has had a great deal of influence from modern impacts. The author studied especially the coastal fishing carried on by natives of Oki and that carried on by emigrants to the islands. His conclusions may be summerized as follows:
    1. The fishing in Oki Island in the latest stage of the feudal age was chiefly done by the fishermen of Oki.
    2. Since the last period of feudal days (circa 1834) fishermen from Japan proper began to come to Oki to work.
    3. Modern fishing with large amount of capital was chiefly developed by capitalists from Japan proper frown 1910 on. The major type of fishing under this system was purse seining and using trawling nets.
    4. Severe pressure of the capitalistic fishing on the fishermen of the island was exerted after 1917 when there was poor catch of cuttle fish, the main haul in Oki.
    5. The monopoly of the fishing of the island by outside capital was intensified after 1941.
    6. Since 1946 the haul in Oki increased rapidly by using purse seines and medium trawling nets, but the pressure on fishing by old methods exerted by industrial fishing was very strong. Thus, (a) most of the haul went to other districts, so that the gross receipts of Oki decreased. (b) The coastal haul was decreased by the development of the large-scale-fishing. (c) The coastal fishing by old fishing methods is now at a disadvantage on the basis of both amount and quality compared to the capitalistic fishing.
    7. The modernization of fishing in Oki island is lagging far behind, and the fishing now carried out by the native fishermen of the islands is declining.
  • ―インドネシア独立期から今日まで―
    北窓 時男
    地域漁業研究
    2020年 60 巻 3 号 137-146
    発行日: 2020/11/20
    公開日: 2021/10/20
    ジャーナル オープンアクセス

    This paper shows history of sardine fishery in Bali strait, Indonesia in terms of an industrial system involving fish capture technique, fish processing and distribution. Purse seine was introduced to the area to meet demand of material needed for sardine canning industry founded in the beginning of 1970s, and has continued as the main fish capture technique up to now. Dry fish was the main stream of fish processing at Muntjar, East Java in 1950s, thereafter fish canning has taken over the position since 1970s. The dry fish products are distributed only to the eastern tip of Java Island at present, while sardine cans are distributed to not only domestic markets but overseas such as Australia and Arabic countries.

  • 河崎 豊, 斉藤 俊, 中野 公彦, 岡 正朗, 硲 彰一, 岩永 聡司
    バイオフロンティア講演会講演論文集
    2003年 2003.14 巻
    発行日: 2003/09/17
    公開日: 2017/06/19
    会議録・要旨集 フリー
  • 飯高 勇之助
    日本水産学会誌
    1956年 22 巻 7 号 389-392
    発行日: 1956/11/25
    公開日: 2008/02/29
    ジャーナル フリー
    As the fourth step in the experimental studies of the purse seine, a series of model experiments was made with the purpose of investigating the timely change of the depth of bottom margin of the net in the course of operation. The model gear and the experimental apparatus were the same as were used in the previous experiments1, 2). For two cases, when it took, (I), 1/2 second (about 2.1 minutes for full scale) and, (II), 1 second (about 4.2 minutes for full scale) after the net had been set into the standing water, the pursing operation was begun mechanically with a speed of 16.5cm./sec.. Then, the transformation of the net in whole course of operation was filmed with a speed of 16 pieces per second (Fig. 1).
    As the results of these experiments, the relation between the depth of bottom margin of the net and the time required to attain that stage was obtained as shown in Fig. 2, from which the following facts for full scale of net were presumed;
    a. For about 4 minutes (that is the second 1/4 duration of whole time (T) required to the setting and pursing) after the pursing was begun, the bottom margin of fish bag might still continue such a movement of sinking that it had done up to that time.
    b. The bottom margin of fish bag may sink to the deepest depth, that is, about 60 meters (40% of the stretched depth (L) of webbing of fish bag) at about 8 minutes (1/2 stage of the whole time) after the setting was begun.
    c. If the pursing is begun at 2 minutes (1/8T) after the setting was finished*, the maximum depth to which the bottom margin reaches may increase about 10 meters (7% of L).
  • 村上 正洋, 百束 比古
    Skin Cancer
    2000年 15 巻 3 号 299-304
    発行日: 2000/12/25
    公開日: 2010/08/05
    ジャーナル フリー
    Purse-string suture technique has been described in many papers for the circular defect closure after skin tumor removal. We have modified this technique to pull an intradermal continuous stitch which is placed around the wound margin. We applied this technique in six facial skin cancer cases (seven lesions) and obtained satisfactory results. This technique seem to be simple, rapid and useful for skin defect closure, especially in cases of facial skin cancers which are usually seen in older indivisuals.
    In this paper, clinical experiences of this technique in facial skin cancer cases are presented. In addition, we refer to the advantage of excisional biopsy using this. [Skin Cancer (Japan) 20; 15: 299-304]
  • 飯高 勇之助
    日本水産学会誌
    1958年 24 巻 6-7 号 407-410
    発行日: 1958年
    公開日: 2008/02/29
    ジャーナル フリー
    It is a question whether Tauti's law on model experiment is tenable in such a small model as 1/250 or not. In order to check the validity of this law, a relatively large scale model experiment had to be made. An experiment was made with a 1/10 model in the sea to compare the results with the results obtained with the 1/250 model. The result is shown in Fig. 2, which shows a quite satisfactory agreement. Moreover, in the present experiment, the be haviour of the bottom margin of the net during pursing was observed using a newly deviced depth-meter and chemical tubes (Fig. 3).
  • 金 碩鍾, 今井 健彦, 菊川 浩行
    日本水産学会誌
    1992年 58 巻 6 号 1037-1042
    発行日: 1992年
    公開日: 2008/02/29
    ジャーナル フリー
    This study deals with the sinking characteristics of weighted netting, a basic study in purse seine. The experiment was carried out using five simplified model nets in a flume tank under still water condition. The mean densities (ρ) of netting materials were 0.91g/cm3 for A net, 1.14 g/cm3 for B net, 1.38g/cm3 for C net, 1.70g/cm3 for D net, and 2.10g/cm3 for E net. A number of spherical tiny leads were attached separately on the net surface so that each of the models will have the same weight in water. The Reynolds number of nettings used ranged from 7 to 170.
    Differential equations were derived from the conservation of momenta of the model nets and used to determine the sinking speeds of the depths of leadline and the other portions of nets.
    The results were as follows:
    1) Sinking speed was fastest for A net, followed by B, C, D, and E nets.
    2) The drag coefficient of netting was estimated to be 0.025 (ρ/ρω)3.
    3) The drag coefficient of netting bundle was estimated to be 0.91 (ρ/ρω).
    In all nets, the calculated depths of leadline closely agreed with the measured ones.
  • ―『土井子供くらし館』所蔵品から (Part.4守袋) ―
    鳥居本 幸代
    繊維製品消費科学
    1999年 40 巻 7 号 436-441
    発行日: 1999/07/25
    公開日: 2010/09/30
    ジャーナル フリー
  • 岩永 聡司, 斉藤 俊, 岡 正朗, 佐久間 淳, 中野 公彦
    バイオエンジニアリング講演会講演論文集
    2002年 2002.14 巻
    発行日: 2002/03/01
    公開日: 2017/06/19
    会議録・要旨集 フリー
  • 日本機械学会誌
    1949年 52 巻 371 号 417-
    発行日: 1949/11/25
    公開日: 2017/06/21
    解説誌・一般情報誌 フリー
  • 郷内 武, 寺上 伸吾, 西谷 千佳子, 山本 俊哉, 霞 正一
    Journal of the Japanese Society for Horticultural Science
    2009年 78 巻 1 号 49-54
    発行日: 2009年
    公開日: 2009/01/28
    ジャーナル オープンアクセス
    これまでに得られているニホンナシ‘
    巾着
    ’の黒星病抵抗性(Vnk)に連鎖する 5 種類の DNA マーカーの実際の育種における有効性について,‘
    巾着
    ’を親に含む4系交雑で得られた 2 集団におけるマーカーの有無と接種試験結果との比較を行うことで検証した.‘
    巾着
    ’の抵抗性に連鎖した DNA マーカーと病徴程度との関連について調査した結果,‘
    巾着
    ’由来の STS-OPW2~STS-OPO9 の領域を持たない個体は,全て葉に胞子形成をともなう著しい病徴(罹病性)を示した.反対に,これらの領域が‘
    巾着
    ’型の個体では無病徴(高度抵抗性)のもの以外に,退緑斑や壊死斑などの抵抗性反応(抵抗性)や葉柄にわずかな胞子形成(中度抵抗性)を示す個体がみられるものの病徴は総じて軽微であった.これらのことから,‘
    巾着
    ’の Vnk の導入を目的とした育種においては,STS-OPW2 と STS-OPO9 の両方を持たない個体を罹病性と判断し淘汰することで,集団の個体数を減少させ育種効率を高めることが可能であると考えられた.
  • 高木 陽光
    比較都市史研究
    2001年 20 巻 2 号 6-7
    発行日: 2001年
    公開日: 2017/08/25
    ジャーナル フリー
  • 縮結と網たけについて
    小長谷 庸夫
    日本水産学会誌
    1971年 37 巻 9 号 866-870
    発行日: 1971/09/25
    公開日: 2008/02/29
    ジャーナル フリー
    The influence of hanging and net depth on gear characteristics of the purse seine was investigated.
    The results obtained are summarized as follows;
    1) The sinking speeds of large hanging and shallow nets are larger than those of smaller hanging and deep nets.
    2) The most favorable shape such as the cupping and scooping action during pursing was observed with the use of a model net and it was noticed that webbing was “hung in” to the corkline leadline 10% (0.1).
    3) The tension in the purseline during pursing was roughly proportional to the net depth, but it was evident that hanging has little effect on tension.
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