• Title/Summary/Keyword: 포구

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The Economic-Geographical Consideration of Fisheries of the West Coast Area, Chungnam in the 1910s in "Hangooksusanji" ("한국수산지" 를 통해 본 1910년경 충남 서해안 지역 수산업에 관한 경제지리학적 고찰)

  • Jo Chang-Yon;Kim Hag-Tai
    • Journal of the Economic Geographical Society of Korea
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    • v.8 no.1
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    • pp.153-169
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    • 2005
  • In this study, we analysed the state of the fisheries in Chungnam around 1910 from Hangook Susanji. As a result, there were about 30 ports in the west coast area in Chungnam, and we can classify their locations into 5 types Type I is located in small and mid sized rivers. Type II is located in a costal port. Type III is ports facing the open sea, and type IV is ports in a bay. Type V is ports on islands of coast. Species of fish are porges, mackerels, sting rays, croakers, hairtails, shrimps, etc. The base of fishing porge was Jukdo and Yeondo. The fishing banks of croakers are formed from Chilsantan, Jeonlado to the area of seashore, Chungnam. Hairtails were caught near all the areas of seashore. Salt manufacturing is done near all coasts of Chungnam, Seocheon-bay, Ungcheon-bay, Ocheon-bay, Anmyeon island, Taean, Dangjin area, etc represent this work. Especially, the salt which was produced in Taeangun was so famous that it was called ' Taeansalt'. In the Kum-river area there were 32 fishing villages. Freshwater fish were caught in the upper stream area and the mouth of Geumgang, down stream, was the center for producing Baengeo. There were 23 fishing villages, and the species consisted of croaker, hairtail, Forge, gray mullet, sting ray, sharks, anchovy, shrimps, etc in Biin-bay. The coast of Boryeong had about 33 fishing villages, but their fishing industry was not developed more than their good salt manufacturing. Though there are records that Chunsu-bay had 28 fishing villages, Taean peninsula and Garolim-bay had about 70 fishing villages, and Asan-bay area had about 55 fishing villages, they were developed a little, but not more than Weir fisheries or salt manufacture on the base of salt area and the tideland because these areas were just for farming. South of Anmyeon island of West coast island areas is the biggest area of Stow nets on stakes fishing and the island areas down mouth of Kum river were centers for producing porge.

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일반

  • 한국어항협회
    • Monthly Newsletter
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    • no.197
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    • pp.5-5
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    • 2004
  • 어항협회, 국가어항 건설자료 조사 및 발간 용역 수주 - 왕돌초 주변 침체어망 인양사업 개시 - 동해안 항포구 모래 유입현상 심각

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회원작품

  • Korea Institute of Registered Architects
    • Korean Architects
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    • no.5 s.289
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    • pp.8-41
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    • 1993
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A Study on the Uncertainty of MVRS (포구속도측정레이더의 불확도에 관한 연구)

  • Park, Yong-Suk;Choi, Ju-Ho
    • Journal of the Korea Institute of Military Science and Technology
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    • v.10 no.1
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    • pp.94-100
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    • 2007
  • MVRS's measuring principles are based on the Doppler principle. It measures the velocities near the muzzle using the doppler signal output from the antenna and then predicts the velocity of the bullet leaving the muzzle by performing the regression analysis on previous measured velocities. There are a number of error sources when calculating the muzzle velocity. Antenna has long term frequency stability error and the doppler signal from the antenna has noise. These two error sources influence the accuracy of estimated velocities from the doppler signal. Estimated velocity errors result in the random error of data statistics. And when performing a regression analysis these random error components are transferred to the fitting error component. This study also analyzed the error components according to the hardware limitations of MVRS-700 and the signal processing method, and presented the calculated uncertainty of muzzle velocity.

A Study on the Storage Life Estimation Method for Decrease of Muzzle Velocity using Gamma Process Model (감마과정 모델을 적용한 포구속도 저하량에 따른 저장수명 예측기법 연구)

  • Park, Sung-Ho;Kim, Jae-Hoon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.5
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    • pp.639-645
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    • 2013
  • The aim of the study is to investigate the method to estimate a storage life of propelling charge on the decrease of muzzle velocity by stochastic gamma process model. It is required to establish criterion for state failure to estimate the storage life and it is defined in this paper as a muzzle velocity difference between reference value and maximum allowable standard deviation multiplied by 6. The relationship between storage time and muzzle velocity is investigated by nonlinear regression analysis. The stochastic gamma process model is used to estimated the state distribution and the life distribution for storage time for 155mm propelling charge KM4A2 because the regression analysis is a deterministic method and it can't describe the distribution of life for storage time.

Study on the control of Early Elight of Potato of Potato with Several New Fungicides (감자$\cdot$겹 둥근 무늬병에 대한 신살균제 효과 비교 시험)

  • Jung Bong Jo;Lee Soon Hyong
    • Korean journal of applied entomology
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    • v.2
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    • pp.12-15
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    • 1963
  • 1. The trials were planned to test seven different fungicides for the control of Early blight of potato during the period of 1962 and 1963. 2. All of fungicides tested in the trials were considerably effective to control the disease, as the result of 4 applications which was done in one week intervals from early of June in 1963. All treatments were effective enough to make significant differences from the untreated. Especially, Dithyane M45, Difolatan and Dithane M22 showed satisfactory control even though no significant differences were obtained among them. Besides the three treatments, Bordeaux Mixture were relatively effective.

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