담수산새우 Macrobrachium rosenbergi(de Man) 의 초기유생 및 post - larva 의 성장에 미치는 염분량에 관하여

권진수,우야관,소립원의광 한국수산학회 1977 한국수산과학회지 Vol.10 No.2

The fresh water prawn, Macrobrahium rosenbergi(de Man) is a very common species in Indo-pacific region, which inhaits both fresh and brackish water in low land area, most of rivers and especially aboundant in the lower reaches which are influenced by sea water. It is one of the largest and commercial species of genus Macrobrachium, which is commonly larger than 18~21 cm in body length, from the basis of eye-stalked to the distal of telson. As a part of the researches in order to investigate the possibilities on transplantation and propagation of this species, this work dealt with the problems on the effects of chlorinities upon zoeal larvae and post-larvae- 1). metamorphosis rate and optimum chlorinity for metamorphosis to post-larve, 2). tolerance and comparative survival rate on various chlorinties, from fresh water to sea water (19.38‰CI), which reared for six days upon each stage of zoeal larvae, 3). accomodation rate on chlonities which reared for twelve days after transmigration into variant chlorinities of the range from 3.68‰CI to 1.53‰CI in the way of rearing of the range from 3.82‰CI to 11.05‰CI upon each stage of zoea, 4). tolerance on both fo fresh and sea water upon zoeal larva and post-larva under the condition of 28℃ 1 in temprature and feeding on Arteinia salina nauplii, 5). relationship between various chlorinities and growth of post larvae under the condition of 28℃ in temperature and feeding on meat of clam. Thus these investigations were performed in order to grope for a comfortable method on seedmass production. Up to the present, the study on the effects of chlorinity upon earlier zoeal larvae and post-larvae of Macrobrachium species has been scarcely performed by workers with the exception of Lewis(1961) and Ling(1962, 1967), even so their works were not so detailed. On the other hand, larvae of several species of this genus were reared at the water which mixed sea water so as to carry out complete metamorphosis to post-larva by workers in order to investigate on earlier larval and earlier post-larval development, such as Macrobrachium lamerrei (Rajyalakshmi, 1961), M. rosenbergi and M. nipponense (Uno and Kwon, 1969; Kwon and Uno, 1969), M. acanthurus (Choudhury, 1970; Dobkin, 1971), M. carcinus (Choudhury, 1970), M. formosense (Shokita, 1970), M. olfersii (Duggei et al., 1975), M. novaehallandiae (Greenwood et al., 1976), M. japonicum (Kwon, 1974) and M. lar (Shokita, personal communication), and there-fore it is regarded that chlorinity is, generally, one of absolute factors to rear zoeal larvae of brackish species of Macrobrachium genus. Synthetic results on this work is summarized as the follwings: 1) Zoeal larvae required different chlorinities to grow according to each stage, and generally, it is regarded that optimum range of living and growing is from 7.63‰CI to 12.42‰CI, and while differences of metamorphsis rate, from first zoea to post-larva, is rarely found in this range, and however it occurs apparently in both of situation at 4.42‰CI below and 16.13‰CI above and moreover, metamorphosis rate is delayed somewhat in case of lower chlorinity as compared with high chlorinity in these situations. 2) Accomodation in each chlorinity on the range, from fresh water to sea water, is different according to larval stages and while the best of it is, generally, on the range from 8.28‰CI to 12.42‰CI and favorite cholrinity of zoea have a tendency to remove from high chlorinity to lower chlorinity in order to advance larval age throughout all zoeal stages, setting a conversional stage for eighth zoea stage. 3) Optimum chlorinity of living and growth upon postlarvae is on the range of 4.25‰CI below, and in proportion as approach to fresh water, growth rate is increased. 4) Post-larvae are able to live better in fresh water in comparison with zoeal larvae, which are only able to live within fifteen hours, and by contraries, post-larvae are merely able to live for one day as compared with zoeal larvae, which are able to live for six days more in sea water (19.3‰CI above). 5) Also, in case of transmigration into higher and lower chlorinities in the way of rearing in the initial chlorinities (3.82‰CI, 7.14‰CI and 11.05‰CI), accomodation rate is as follow: accomodation capacity in ease of removing into higher chlorinities from lower chlorinities is increased in proportion as earlier stages, setting a conversional stage for eighth zoea stage, and by contraries, in case of advanced stages from eighth zoea it is incraesed in proportion as approach to post-larva stage in the case of transmigration into lower chlorinity from highor chlorinity. On the other hand, it is interesting that in case of reciprocal transmigration between two different chlorinities, each survival rate is different, and in this case, also, its accomodation in each zoea stage has a tendency to vary according to larval stages as described above, setting a conversional stage for eighth zoea stage. 6) It is likely that expension of radish pigments on body surface is directly proportional to chlorinity during the period of zoea rearing, and therefore it seems like all body surfaces of zoea larvae be radish coloured in case of higher chlorinity. 7) By the differences that each zoeal larvae, postlarvae, juvaniles and adult prawn are required different chlorinity for inhabiting in each, it is ragarded that this species migrats from up stream to near the estuary of the river which the prawns inhabits commonly in natural field for spawning and growth migration. 8) It had better maintainning chlorinities according to zoeal stage for a comfortable method on seed-mass production that earlier larva stages than eighth zoea are maintained on the range from 8‰CI to 12‰CI to rear, and later larva stages than eighth zoea, by contraies, are gradually regulated to lower chlorininity of the range from 7‰CI to 4‰CI according to advance for post-larva stage.

소형경수로용 인쇄기판형 증기발생기 크기 열수력적 예비평가

권진수 한국에너지학회 2022 한국에너지공학회 학술발표회 Vol.2022 No.10

대형 담수산새우, Macrobrachium rosenbergii (De Man)의 생식 생현에 관한 연구 IV. 산란, 수정 및 포란 과정

권진수,이복규,김병기 한국생명과학회 1999 생명과학회지 Vol.9 No.5

Timing of oviposition, nuclear maturation of oocytes, egg-sperm contact and brooding were observed in the giant fresh-water prawn Macrobrachium rosenbergii reared in the laboratory. When a pre-spawning molted female was transferred to the male, the female oviposited commonly at 5 to 10 hr after mating. The first polar body were extruded within 2-3 min after spawning. The egg chromosome progressed to release second polar body by 30 min and mitotic nuclear division occurred in 8 hr after spawning. Thumbtack-shaped spermatozoa were seen peneterating egg membrane with their spike directed forward. Transformation of spermatozoa and fertilization membrane could not be observed by light microscopy. The elapsed hours from oviposition to the end of brooding wee taken in 5-7 hr. Brood size for female 9 cm and 18 cm in body length was estimated to be 10,000~15,000 and 100,000 eggs, respectively and is proportional to the total length of the berried females. The ovigerous females reared at chlorinity of 2.21~4.25$\textperthousand$Cl. showed a normal egg development up to hatching.

Macrobrachium rosenbergi(De Maan) 의 초기유생의 성장 및 수온과 변태와의 관계

권진수 한국수산학회 1974 한국수산과학회지 Vol.7 No.2

水槽內에서 馴化된 親蝦에서 부화시긴 幼生을 實驗室內에서 水溫 27.5∼28.7℃, 鹽分 6.58∼7.05‰Cl, pH 8.0-8.2, 照度 3000lux, 濾過水量 0.3ℓ/min의 조건하에서 먹이로는 Artemia salina nauplius를 給與하여 飼育하였다. 2. 갓 부화된 zoea 幼生의 體長을 1.92㎜이며 第1 poat-larva는 7.69㎜로써 11令期의 zoea期에서 第1 post-larva로 變態하며 上記 條件下에서는 35日이 소요되며 第11令期에서 第1 post-larva로 變態할 때 腹節의 길이가 줄어 들고 굵어진다. 3. 갓 부화된 幼生의 第3 腹節의 背面에 出現하는 3個의 免素胞와 尾節의 基部에 나타나는 1個의 色素胞는 Palaemonidae屬외 새로운 分類指標로 重要하다. 4. 幼生의 第6令期 부터 個體變異體 "숙성이"가 出現하며 同一 令期個體郡에서 形態的으로 뛰어나게 크다. 5. 幼生의 全發生令期를 通하여 特히 "숙성이"가 出現하기 쉬운 段階가 있는 것 같으며 이것은 第6令期와 第10令期인 것 같다. 이 現象은 體長의 變動輻의 넓이와 關係가 크며 이것은 攝餌要因이 가장 크게 作用하는 것같다. 6. 幼生의 發生途中 完全한 skipping 現象이 나타나는 것처럼 여겨졌으나, 令期別 各 附屬器官의 形態的인 특징을 比較관찰한 결과, 어느 令期가 完全히 skipping하는 것은 아닌 것 같다. 7. "숙성이"의 附屬器官을 比較檢討한 結果, 한令期에서 다음 令期로 分化發生할 때 各 器官의 分化가 同時에 이루어지는 것이 아니고, 어떤 連關性을 가지며 各 器官마다 個別的인 分化發生速度를 유지하며 分化의 同時性은 볼 수 없는 것 같다. The fresh water prawn, Macrobrachium rosenbergi(De Maan) is a very common species in Indo-Pacific region inhabiting both fresh and brackish waters in low land areas, and especially abindant in the lower reaches of most rivers which are influenced by seawater. It is one of the largest and commercial species of genus Macrobrachium. As a place of the researches to clear the possibilities of transplantation and propagation of this species in the Far Fast region the larval development, growth, optimum temperature and metamorphose rate up to first post larvae in aquarium are cleared under the conditions of salinity 6.58-7.05‰ Cl, pH 8.0-8.2, the rate of flow 0. 3 liter per minute and illumination 3000 lux. Temperature ranged from 27.5 to 28.7℃ during the period of earlier larval development. For the study on the relationship between temperature and metamorphose rate from zoea to first post larvae, the temperatures in experimental tank were 22.2℃ ±1, 26.1℃±0.85, 28.1℃±0.34, 30.4℃±0.66, 33.7℃±0. 66, 33.7℃±0.38 and 36.8℃±0.26. Daring the work, food used for the larvae was Artemia salina nauplius in the filter-circulation aquariums. This species metamorphosed to the first post-larvae through eleven zoea stages, and the characters of each larval stage are described and optimum temperature for metamorphosis rate and survivals to the first post larvae is 28.1℃±0.34.

전문대학 평가제도 및 재정지원 정책의 개선방안

권진수 한국고등직업교육학회 2003 한국고등직업교육학회 학술대회 논문집 Vol.2003 No.2

Observer-Based FL-SMC Active Damping for Back-to-Back PWM Converter with LCL Grid Filter

권진수,이한수,김성신 한국지능시스템학회 2015 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.15 No.3

This paper proposes an active damping control method for a grid-side converter that has an LCL grid filter in the back-to-back converter. To remove the resonant frequency components producedbytheLCLfilter,itisnecessarytomeasurethegridcurrent. Todothis,sensorsmust be added. However, it is not necessary to add sensors because the grid current is estimated by designing a suboptimal observer. In order to remove the nonlinearity and to gain fast response of control, both feedback linearization and sliding mode control are applied. The proposed method is verified through a simulation.

여행자들의 공유숙박 경험이 지각된 가치와 이용의도 및 추천의도에 미치는 영향

권진수,박영진,양재영 한국호텔외식관광경영학회 2024 호텔경영학연구 Vol.33 No.1

이 연구는 여행자들의 공유숙박 경험이 지각된 가치와 이용의도 및 추천의도에 미치는 영향관계를 파악하기 위해 진행한 연구이다. 본 연구를 충실하게 검증하기 위해서 여행자들에게 자기기입 방식으로 설문지를 작성하게하여 총 298부의 설문자료를 수집하여 통계분석에 활용하였다. 이 연구는 SPSS 22.0 통계패키지 프로그램을 활용해서 연구를 수행하였다. 수집된 표본자료는 빈도분석과 탐색적 요인분석을 수행하여 여행자들의 공유숙박 경험, 지각된 가치, 이용의도, 추천의도 변수들을 도출하였다. 그리고 각각의 변수들에 대한 신뢰도 분석과 타당성 검증 그리고 상관관계분석과 다중회기분석 등을 수행하여 본 연구검증을 수행하였다. 이 연구에 대한 검증결과는 다음과 같다. 첫째, 공유숙박 경험은 지각된 가치에 부분적으로 유의미한 영향을 미치는 것으로 검증되었다. 둘째, 지각된 가치는 이용의도에 유의미한 영향을 미치는 것으로 검증되었다. 셋째, 지각된 가치는 유의미한 영향을 미치는 것으로 검증되었다. 넷째, 이용 의도는 추천의도에 유의미한 영향을 미치는 것으로 검증되었다. 본 연구결과를 통해서 공유숙박서비스 향상과 발전을 위해서는 다양한 프로그램 개발과 보완이 필요하다는 점을 인식하게 되었다. This study was conducted to understand the impact of travelers' shared accommodation experi ences on their perceived value, intention to use, and intention to recommend. In order to verify the validity of this conceptual framework, travelers were asked to fill out a self-administered questionnaire, and a total of 298 questionnaires were collected and used for statistical analysis. This study was conducted using the SPSS 22.0 Statistics program. Frequency analysis and exploratory factor analysis were applied to the col lected data to derive the variables of travelers' shared accommodation experience, perceived value, intention to use, and intention to recommend. Reliability analysis and validation of each variable, correlation analysis, and multiple regression analysis were also conducted in order to verify this study. The results of this study are as follows: First, shared accommodation experience has a partially positive and significant effect on perceived value. Second, perceived value has a positive and significant effect on intention to use. Third, perceived value has a positive and significant effect. Fourth, intention to use has a positive and significant effect on intention to recommend. Through the results of this study, we have determined that various pro grams must be developed and supplemented to improve and develop shared accommodation services.

Voltage Source Equipment for the Grid Fault Testing and Analysis of Total Harmonic Distortion According to PWM Methods

권진수,김춘성,강대욱,박정우,김성신 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6

Renewable energy is being spotlighted as the electric power generating source for the next generation. Due to an increase inrenewable energy systems in the grid system, their impact on the grid has become non-negligible. Thus, many countries in the world,including Europe, present their own grid codes for grid power conversion devices. In order to experiment with these grid codes, gridfault test equipment is required. This paper proposes both equipment and a control method, which are constructed with a 7-levelcascaded H-bridge converter, that are capable of generating various grid faults. In addition, the Pulse Width Modulation (PWM)method for multilevel converters is compared and analyzed. The proposed structure, the control method, and the PWM method areverified through simulation and experimental results.

대형 담수산새우, Macrobrachium rosenbergii (De Man) 의 생식생현에 관한 연구 III. 수새우 생식기관과 정포의 형태

권진수,이복규,김병기 한국생명과학회 1999 생명과학회지 Vol.9 No.4

In the giant freshwater prawn Macrobrachium rosenbergii, the paired testes were united by the testes bridge in a H-shape. During mating male discharged two hemispermtophores from right and left genital pore and they were joined and formed a compound spermatophore in peach shape. Hemispermatophore was considered to be produced at proximal and middle vas deferens region. The compound spermatophore consisted of an eosinophilic inner matrix, a basophilic outer matrix and paired sperm mass burried in the basophilic matrix. The size of compound spermatophore was 6.4∼ 9.3 mm in length and 2.4∼5.1 mm in width regardless of carapace length. After the spermatophore was deposited on female's ventral sternum behind of 5th pereiopod, it was moved to the ventral surface of 3rd and 4th pereiopods by means of the beating of male's 1st and 2nd pleopods.

수정된 블록 제로트리를 이용한 영상 부호화

권진수,유지상 한국통신학회 2001 韓國通信學會論文誌 Vol.26 No.4

웨이블릿 변환은 영상을 위치 정보와 주파수 정보를 가지고 표현함으로서 다른 변환 방식과는 큰 차이를 보여준다. 웨이블릿 변환된 2-D 영상은 인간의 시각 체계(Human Visual System)에 적정한 양자화 및 부호화를 위한 계층적 구조를 제공한다. 인간의 시각이 민감하게 감지하는 성분은 정확하게 부호화하고 다른 성분은 적절한 정보의 손실을 적용하는 원리를 이상적으로 적용할 수 있다. 이런 웨이블릿 변환의 통계적 특성을 이용한 제로트리(zerotree) 부호화 기법은 영상 전체에서 의미 있는 계수를 선별하여 약속된 우선 순서대로 부호화함으로써 매입파일(embedded file)을 생성한다. 본 논문에서는 Shspiro 가 제안한 EZW(embedded Zerotree wavelets) 알고리즘을 개선하여 화소 단위가 아닌 블록 단위로 부호화 함으로서 좀더 나은 성능을 가진 알고리즘을 제안하였다.