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Maturity and Spawning of Snailfish, Liparis ochotensis (Schmidt), in the East Sea
양재형,이성일,윤상철,김종빈,전영열 한국수산과학회 2010 Fisheries and Aquatic Sciences Vol.13 No.4
Maturity and spawning of the snailfish, Liparis ochotensis was investigated based on samples collected by gill net in the East Sea of Korea from December 2008 to December 2009. The average total length of L. ochotensis was 63.4-cm and 64.1-cm for females and males, respectively. Gonadosomatic index (GSI) began to increase in July, reaching a maximum in November, then began to decrease in December. Monthly changes in the GSI values of L. ochotensis were similar for females and males. Annual reproductive cycle of this species can be divided into five successive stages in females: early growing stage (May), late growing stage (June to July), mature stage (August to September), ripe and spent stage (September to December), and recovery and resting stage (January to April). Males show four successive stages; growing stage (May to July), mature stage (August to September), ripe and spent stage (September to December), and recovery and resting stage (January to April). Relationship between total length (TL) and fecundity (F) was F=0.00003TL4.002 (R2=0.703), and F increased with TL. Total length at 50% group maturity was estimated to be 55.8-cm. Our findings suggest that the spawning period takes place from September to December, with the main spawning period occurring from October to December.
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양재형 江南大學校産學技術硏究所 2002 산학기술연구소논문집 Vol.- No.14
본 논문은 부분파싱을 위한 새로운 기법으로 변형기반 학습에 의한 문장분할을 제안한다. 제안된 기법은 청킹에 기반하는 기존의 부분파싱 기법과 달리, 문장 내의 분할 지점을 추정하고 이에 따라 문장을 분할하여 각 분할된 부분을 통상의 파서로 파싱하는 전략을 취한다. 문장 분할지점의 추정을 위해 대량의 트리뱅크로 부터 변형기반 학습에 의해 일련의 변형 규칙을 학습한다. 이 기법은 기계번역과 같이 통상의 문법에 의한 파싱 모듈과의 효과적인 결합이 필요한 응용에 적합하다. 15만 어절 규모의 현대 중국어 말뭉치를 이용한 실험 결과를 보인다.
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Parsing the Wh-Interrogative Construction in Korean
양재형,김종복 한국언어정보학회 2013 언어와 정보 Vol.17 No.2
Korean is a wh-in-situ language where the wh-expression stays in situ with an obligatory Q-particle marking its interrogative scope. This paper briefly reviews some basic properties of the wh-question construction in Korean and shows how a typed feature structure grammar, HPSG (Pollard and Sag 1994, Sag et al. 2003), together with the notions of ‘type hierarchy’ and ‘constructions’, can provide a robust basis for parsing the wh-construction in the language. We show that this system induces robust syntactic structures as well as enriched semantic representations for real-time applications such as machine translation, which require deep processing of the phenomena concerned.
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양재형,이수정,김병관,정정모,김성훈 한국수산해양기술학회(구 한국어업기술학회) 2022 수산해양기술연구 Vol.58 No.2
In this study, the fishery status of the octopus pot fishery in the east coastal sea were investigated, and the fishing performance of each pot shape was compared and analyzed. The fishery status survey was conducted through listening surveys at Jukbyeon Port, Uljin Port and Pohang Daebo Port in Gyeongbuk Province, and the amount of fishing gear used, fishing method, size and loss of octopus pot fishery was investigated. On the east coastal sea, octopus is one of the commercially important fish stocks and is caught in inshore pots, inshore combos, inshore gillnets and offshore pots. Among these fishing methods, pot fishing yields the highest catch. The shape of the pot differs depending on the region. In Uljin (Jukbyeon Port and Hupo Port), Gyeongbuk, rectangular type net pots are mainly used, and in Pohang (Daebo Port) in Gyeongbuk, drum-type pots are mostly used. Enteroctopus dofleini accounts for more than 90% of the catch of octopus. For the octopus fishing performance test by trap type, three types of traps (rectangular pot, drum pot and cylinder pot) were used on the coastal sea of Pohang Daebo. As a result, the total catch by pot shape was shown in the order of rectangular-type pot > drum-type pot > cylinder-type pot. The catch of octopus, the target species, was in the following order: rectangular-type pot > drum-type pot > cylinder-type pot. Such result shows a significant difference (Mann-Whitney test, p<0.05).
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동해 강원도 연안 임연수어, Pleurogrammus azonus 의 연령과 성장
양재형,윤병선,김종빈,최영민,박정호,이재봉,박기영,이동진 한국수산해양기술학회 2018 수산해양기술연구 Vol.54 No.1
The age and growth of Pleurogrammus azonus in the coastal of Gangwon-do, East Sea were determined, from monthly samples of commercial catches, caught by the gill net and set net fishery from January to December in 2008. Gonadosomatic index (GSI) began to increase in September, and reached the maximum between November and December. After spawning GSI began to decrease from January. The annuli of P. azonus are formed once a year, with the boundary between opaque and translucent zones forming from December to January. The relationships between fork length (FL) and body weight (BW) were BW = 0.005 FL3.240(R2 = 0.963) for females and BW = 0.006 FL3.238(R2 = 0.946) for males. The FLs at annuli formation in otoliths were back-calculated from the otolith-length relationship and were adjusted to von Bertalanffy growth curves to FLt = 70.54 (1–exp(-0.099(t+1.188))) for females and FLt = 51.87 (1–exp(-0.135(t+1.697))) for males. Until the age of 3 years, males grew faster than females; however, from the age of 4 years, females grew faster than males. In the future, we want to study the relationship between early growth and water temperature changes in the East Sea 본 연구는 강원도 동해 연안에서 자망과 정치망에 주로 어획되는 임연수어의 연령과 성장특성을 구명하기 위하여 2008년 1월부터 12월까지 매월 시료를 채집하여 조사를 수행하였다. 산란특성을 구명하기 위하여 생식소숙도지수의 변화를 관찰한 결과 9월부터 점차 증가하기 시작하여 11-12월에 가장 높은 값을 보였으며, 1월이 되면서 가장 낮은 값을 나타내어 주 산란기는 11-12월로 추정된다. 윤문의 형성시기 및 연간 형성횟수를 파악하기 위해 월별 연변부연혁지수의 변화를 분석한 결과 윤문은 12월과 1월 사이에 일년에 한번 형성되는 것으로 나타났다. 임연수어의 가랑이체장에 대한 중량증가의 경향을 보기 위해 전장과 중량간의 상대대성장식을 분석한 결과, 암컷은 BW=0.005FL3.240 (R2=0.963), 수컷은 BW=0.006FL3.238 (R2=0.946)로 나타났다. 이석반경과 가랑이체장간의 관계식으로부터 역계산된 연령별 가랑이체장을 이용하여 성장 매개변수값을 분석하고, 이를 바탕으로 임연수어의 von Bertalanffy 성장식을 추정한 결과 암컷은 FLt=70.54 (1 – exp(-0.099(t+1.188))), 수컷은 FLt=51.87 (1 – exp(-0.135(t+1.697)))였다. 성장식을 바탕으로 임연수어의 성장특성을 분석한 결과, 임연수어는 3세 이하의 개체에서는 수컷의 성장이 빠르고, 4세 이상의 고연령이 되면서 암컷의 성장이 빠른 것으로 나타났다. 앞으로 임연수어의 자원관리를 위해서는 수온변화에 따른 초기생활사 연구와 섭식, 산란, 회유 등의 생태적 연구가 지속적으로 진행되어야 할 것으로 판단된다.
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