• ALGAE
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• 제26권4호
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• pp.317-325
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• 2011

Five benthic species of the genus Gambierdiscus (Dinophyceae) were observed for the first time in the coastal waters of Pakistan, Northern Indian Ocean. The morphology of the epiphytic, ciguatera-related toxic species G. toxicus, G. belizeanus, G. polynesiensis, G. australes and G. cf. yasumotoi are presented here, described by the Kofoid system of thecal plates Po, 3', 7", 6c, 8s, 5"', 1p, 2"" with differences in cell shape, cell size, plates, pores around the apical pore plate by using light and scanning electron microscopy. The occurrence of these potentially toxic dinoflagellate species in Pakistani coastal areas of Manora Channel and Balochistan during high temperatures of 28-$32^{\circ}C$ is cause of concern for human health impacts from ciguatera fish poisoning.

• 한국수산과학회지
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• 제49권5호
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• pp.675-677
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• 2016

We report the first occurrence of a tailless Girella leonina, collected from Jeju Island, Korea, in July 2016. This specimen has 10 scales below the median spinous portion of the dorsal fin, a black posterior margin of the operculum, and no pale vertical band on the body, and is therefore similar to the normal species, except that it has no caudal peduncle or caudal fin. The posterior parts of the dorsal and anal fins are gathered vertically at the posterior end of the body. A radiograph indicates that this abnormal specimen is lacking the vertebrae after vertebra 20.

• 한국초지조사료학회지
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• 제9권3호
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• pp.174-178
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• 1989

The investigation was carried out to identify the main pathogen infected with sheath blight in corn plant during 1986-1987. The main fungi of sheath blight isolated from corn plant was identified as Rhizoctonia sobni. Sheath blight in corn plant was first found in early July and infected extremely from late July to end August. Severe sheath blight disease was observed in Gyeongido (Yeoju and Suweon) and Jeonnam (Kwangju) area. The rate of attack was associatied with management and cultural environments of corn plant. Dense planting increased sheath blight, but application of cattle compost reduced the rate of infection. A positive correlation was found between infection rate of shealth blight and concentration of soluble carbohydrate in corn plant (r=0.96). The varieties of Jinjuok, Suweon 83, Suweon 87, Suweon 89, P.3055, P.3160, DK689 and XCG 51 showed remarkable tolerance to sheath blight disease.

• 한국전기전자재료학회논문지
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• 제28권1호
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• pp.34-39
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• 2015

In this study, the characteristics of partial discharge was measured for the four core silicone cable (0.6/1.0 kV, $1.0SQ{\times}4C$) with insulated part of 15 cm and conductor of 1cm. The following results have been confirmed as a result of this study. When the first line of cable is connected to the positive electrode and the second, third line of cable is connected to the negative electrode, it found that the inception voltage and extinction voltage decreased with increasing the line of negative electrode, and the partial discharge charge quantity(Q) increases, while the number of discharge occurrence has decreased. The inception voltage and extinction voltage of partial discharge has decreased with increasing the degradation rate in the 33%, 67%, 100%. Also, it confirmed that the partial discharge charge quantity(Q) and the number of discharge occurrence has decreased.

• 한국응용곤충학회지
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• 제42권2호
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• pp.165-167
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• 2003

지금까지 밝혀지지 않은 애기유리나방의 발생소장을 성페로몬트랩을 이용하여 1998년, 2001년, 2002년 3년 동안 김해와 진주의 단감원에서 조사하였다. 김해지역에서는 연 2회의 뚜렷한 발생성기를 보였다. 제1세대는 5월 중순부터 7월 상순까지, 제2세대는 7월 하순부터 9월 하순까지 발생하였는데, 발생최성기는 각각 6월 상순과 8월 상ㆍ중순이었다.

• Structural Engineering and Mechanics
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• 제34권5호
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• pp.625-634
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• 2010

The objective of this paper is to apply a new proposed accuracy indicator to quantify the true and false modes for Eigensystem Realization Algorithm using output-based responses. First, a discrete mass-spring system and a simply supported continuous beam were modelled using finite element method. Then responses are simulated under random excitation. Natural Excitation Technique using only response measurements is applied to compute the impulse responses. Eigensystem Realization Algorithm is employed to identify the modal parameters on the simulated responses. A new accuracy indicator, Normalized Occurrence Number-NON, is developed to quantitatively partition the realized modes into true and false modes so that the false portions can be disregarded. Numerical simulation demonstrates that the new accuracy indicator can determine the true system modes accurately.

• 대한수의사회지
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• 제19권2호
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• pp.8-20
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• 1983

Clinical and pathological survey on the first occurrence of Johne's disease in south Korea were practised from November 1979 to September 1982 in Kangweondo. The results obtained in the survey were as follows. 1. The clinical cases of the disease were fir

• 대한수의학회지
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• 제21권1호
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• pp.41-43
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• 1981

The occurrence of inclusion body hepatitis was confirmed for the first time in Korea from chickens submitted for diagnosis to this Institute from a farm located in the vicinity of Anyang. The chickens showed no specific clinical signs except for moderate anemic conditions. At autopsy, livers were swollen and mottled with numerous stellate subcapsular hemorrhages and necrotic foci. Severe nephritis and catarrhal enteritis were also seen. The most notable microscopic changes were seen in the liver. These included eosinophilic intra-nuclear inclusion bodies in the hepatocyes, massive hemorrhages and necrosis and fatty changes in the liver parenchema.

• Advances in nano research
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• 제13권4호
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• pp.379-391
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• 2022

One factor that can heighten the risk of the rapture intracranial aneurysm (IA) is bifurcations, which can cause the IA to evaluate. This study presents the effect of geometric of intracranial vascular on the bifurcation analysis of the aneurysm occurrence. The aneurysm mechanism is mathematically modeled based on the nano pipe structures under the thermal stresses, and the impact of the aneurysm geometric on the stability and bifurcation points is analyzed. Because of the dimension of these structures, the classical theories could not predict their behavior perfectly, so the nonclassical and nonlocal theories are required for the mechanical modeling of the aneurysm. The presented results show that the bifurcation point of the aneurysm mechanism is dependent on the environment temperature, and the temperature change plays an essential role in the stability of these structures.

• 한국환경과학회지
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• 제6권2호
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• pp.95-106
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• 1997

The characteristics on the transtion probabilities and periodicity for the daily precipitation occurrence in Korean peninsula are investigated by applying the Markov chain properties to daily precipitation occurrence. In order to examine the responses of Markov Chain properties to the applied period and their magnitudes, three cases (Case A: 1956~ 1985 at 14 stations, Case B: 1965~ 1994 at 14 stations, and Case C: 1985~ 1994 at 63 stations) are considered In this study. The transition probabilities from wet day to wet day for all cases are about 0.50 and in summer, especially July, are higher. In addition, considering them in each station we can find that they are the highest at Ullung-do and lowest at Inchon for all cases. The annual equilibrium probabilities of a wet day appear 0.31 In Case A, 0.30 Case B, and 0. 29 Case C, respectively. This may explain that as the data-period used becomes shorter, the higher the equilibrium probability is. The seasonal distributions of equilibrium probabilities are appeared the lowest(0.23~0.28) in winter and the highest(more than 0.39) in spring and monthly in .truly and in October, repectively. The annual mean wet duration for all cases is 2.04 days in Case A, 1.99 Case B, and 1.89 Case C, repectively. The weather cycle obtained from the annual mean wet and dry duration is 6.54~6.59 days, which are closely associated with the movement of synoptic systems. And the statistical tests show that the transitions of daily precipitation occurrence for all cases may have two-state first Markov chain property, being the stationarity in time and heterogeneity in space.