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강경호,손승찬,김재민,김현정,Kang, Kyoung-Ho,Seon, Seung-Cheon,Kim, Jae-Min,Zhuo, Liang Liang,Lim, Sang-Min,Kim, Hyeon-Jeong The Malacological Society of Korea 2009 The Korean Journal of Malacology Vol.25 No.1
The trumpet shell Charonia sauliae is an endangered and valuable species with potential for aquaculture. For artificial propagation of C. sauliae, the effects of three different food microalgae on the development, growth, and survival rate of the larvae and spat were investigated. For the larval feeding experiments, we utilized six microalgae species as food sources, namely Pavlova lutheri, Tetraselmis suecica, Nannochloris oculata, Isochrysis galbana, Chaetoceros calcitrans, and Phaeodactylum tricornutum; for the larval and spat growth and survival experiments, we utilized T. suecica, C. calcitrans, and P. tricornutum. The results showed that the temporal digestion index (TDI) for the veliger larvae was significantly different for C. sauliae fed the different microalgae species (p < 0.05), that the T. suecica, C. calcitrans, and P. tricornutum cultivars were better suited for larval consumption (p < 0.05), and that the growth and survival of the larvae and spat were significantly influenced by food type, specifically P. tricornutum (p < 0.05). Further research is needed to evaluate the effects of other microalgae species, different algal concentrations, and biochemical composition on the growth and survival of C. sauliae.
Influence of Water Temperature and Salinity on Sand Ejection of Manila Clam, Ruditapes philippinarum
강경호,김재민,김영훈,Kang, Kyoung-Ho,Kim, Jae-Min,Kim, Young-Hun 한국패류학회 2005 The Korean Journal of Malacology Vol.21 No.1
In this study, the influence of water temperature and salinity on sand ejection of Manila clams, Ruditapes philippinarum, was investigated. The result showed that, under different water temperature, the highest quantity of sand ejection was at $20^{\circ}C$, the value of which was 0.091 g, while the smallest one was only 0.058 g at 0$^{\circ}C$. The highest releasing rate, 95.79%, could be seen in $20^{\circ}C$ group, while $0^{\circ}C$ group was the lowest one, 85.29%. Under different salinity, 30 psu group had the highest value, 0.057 g, and 0 psu (freshwater) group was the lowest one, only 0.026 g. At the same time, the highest releasing rate appeared at 25 psu, which was 90%. 0 psu group was the lowest one in releasing rate, 60.47%. According to these results, we recommend that the clams should be placed into the clear seawater with about 25 psu of salinity at near $20^{\circ}C$ to let the clams perform the self-depuration. Better quality of clams containing less impurity in the aquaculture and commerce could be obtained from this pre-treatment.
Gonadal Development and Reproduction in the Trumpet Shell, Charonia sauliae
강경호,김재민,선승찬,김현정,Kang, Kyoung-Ho,Kim, Jae-Min,Seon, Seung-Cheon,Zhuo, Liang Liang,Lim, Sang-Min,Kim, Hyeon-Jeong The Malacological Society of Korea 2009 The Korean Journal of Malacology Vol.25 No.1
This study devised and tested a histological staging system for gonadal development in the trumpet shell, Charonia sauliae, which was collected along the south coast of Jeju Island, South Korea. This paper details for the first time the gonadal development characteristics of C. sauliae. Ovary and testis development in C. sauliae can be roughly divided into five stages: growing, mature, spent, degenerative, and resting. The trumpet shelll has multiple fecundation and fertilization during the spawning season for out-of-step gonadal development in high-temperature and low-salinity environments. Female trumpet shell tended to have larger shells and were more abundant than males (64.26% of all animals collected were female).
군용 무인차량용 20kW급 구동전동기의 설계최적화에 관한 연구
강경호(Kyongho Kang),조상준(Sangjoon Cho),유석진(Sukjin Yu) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper deals with the optimum design criteria for the 20kW PMSM type traction motor using DOE(Design of Experiments) and RSM(Response Surface Methodology). DOE and RSM is recently popular method to design the electrical machines for its simplicity. Using this method, the effects of four design parameters are analyzed. Finally, the effectiveness of this method and design result has been validated by experiments using dynamometer.
재첩, Corbicula fluminea의 저질선택성 및 잠입율
강경호(Kyoung Ho Kang),양호철(Ho Chul Yang) 전남대학교 수산과학연구소 1999 수산과학연구소논문집 Vol.8 No.-
In order to investigate the effect of sediment preference of the marsh clam, Corbicula fluminea, and burrowing rate on growth the shell(spat and adult) reared in the tank of the laboratory culture different size(below 0.10 ㎜, 0.11~0.50 ㎜, 0.51~1.00㎜, 1.01~2.00 ㎜, 2.01~5.00 ㎜ and blank). The higest value in both sediment preference and survival rate of C. fluminea were shown at fine sand below 0.10 ㎜ in the mean diameter. In the burrowing rate experiment to the sediment depth, spat and adult of C. fluminea were mostly distributed from 5 ㎝ to 10 ㎝.
복합혼합날개를 장착한 5×5 봉다발에서 부수로 혼합 및 임계열유속 실험 연구
강경호(K. H. Kang),신창환(C. H. Shin),추연준(Y. J. Choo),윤영중(Y. J. Youn),박종국(J. K. Park),문상기(S. K. Moon),천세영(S. Y. Chun) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Experiments were performed to determine the thermal (or turbulent) diffusion coefficient (TDC) and to investigate the critical heat flux (CHF) performance in the 5×5 rod bundle with 5 unheated rods which are supported by Hybrid Mixing Vane. In this study, HFC-134a fluid was used as working fluid and the fluid temperature were measured in the important subchannels. To determine the TDC value, the measured fluid temperatures were compared with the predicted values obtained from the MATRA code. The best optimized value of β was found to be 0.02 by considering prediction statistics, i.e., average and standard deviations of the differences between the experimental results and code calculations. Using the best optimized value of β as 0.02, the MATRA code predicts the test results of the fluid temperature within ±1.0 % of error. According to the experimental results on CHF of 5 non-heating guide tubes, the case with non-heating guide tube showed a little good performance in terms of CHF.
폐쇄식 순환사육수조에서의 감성돔, Acanthopagrus schlegeli 치어의 적정 먹이량
강경호(Kyoung Ho Kang),김현실(Hyun Sil Kim) 전남대학교 수산과학연구소 1999 수산과학연구소논문집 Vol.8 No.-
A growth experiment of black seabream, Acanthopagrus schlegeli, under different feed amount per body weight in the recirculating water system was conducted at the invertebrate culture laboratory of Yosu National University from March 10 to May 10, 1999. Eight culture vessels with a capacity of 55 ℓ of water each were used under the same condition of water parameters except for feeding rate which were designated to maintain at 0, 0.5, 0.7, and 1.0% per body weight. The highest growth and survival rates of A. schlegeli were obtained when they were fed on artificial 0.7% with 15% of daily growth rate and 100% of survival rate, while lowest performance on non-feeding.