• Journal of Aquaculture
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• v.1 no.1
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• pp.75-84
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• 1988

For studying growth of sea squirt, Halocynthia roretzi, from laboratoy grown seeds, in situ culture experiment was carried out off Hansando located in the southern part of Korea from February 1984 to July 1986. In the growth of the mean body height, sea squirt grew up to 9.15 cm during the above period after they were seeded at about 0.05 cm. The meat weight of 1.27 g at the beginning increased to 41.69 g from February 1985 to March 1986. The decreasing tendency in body height, body breadth, total weight and meat weight of sea squirt was observed during the summer season in 1985 when the water temperature reached $23.53^{\circ}C$ the maximum value in monthly mean, and the specific gravity of sea water remained at the lowest level of 1.0233 in monthly mean. Sea squirt became gradually elongated with the decreasing tendency in the relative growth ratio of body breadth to body height with aging. The monthly mortality of sea squirt was especially higher in June and July than in the other months, and the average monthly mortality was $10.83\%$.

• Journal of Korean Ophthalmic Optics Society
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• v.15 no.4
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• pp.398-404
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• 2010

Purpose: Concerns had been voiced about an oversupply of optometrists in Korea. So, this study aimed to forecast the supply and demand for opticians for policy implications. Methods: Baseline Projection model combined with demographic method was adopted as the supply forecasting method and so was a ratio method using the number of physician and population using weight of healthcare utilization. Results: Under the 'physician to optician ratio', there would be a surplus of 83~700 opticians in 2010 and an undersupply of 15 to surplus of 6,118 opticians in 2025. Under the 'population to optician ratio', there would be a surplus of 1,055 opticians in 2010 and surplus of 9,376 opticians in 2025. Conclusions: We concluded that there would be oversupply for opticians until 2025, although the shortage and surplus of opticians might depend on the ratio's criteria. Hence, policies would need to be developed that could solve the imbalance in requirements and supply for opticians.

• Microbiology and Biotechnology Letters
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• v.32 no.2
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• pp.179-183
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• 2004

Enterovirus isolation was attempted from samples obtained from aseptic meningitis-suspected patients in hospitals in Busan during 2002. Enteroviruses were found in 83 of 703 cases. Echovirus serotypes 2, 3, 6, 7, 9, 13, 25, 29, 30 were isolated in 72 cases while coxsackievirus serotypes B3 and B4 were isolated in 11 cases. The occurrence was found to be distributed from April thru November with the highest rate during June and July. The strains of Vero and HEp-2 of echovirus and coxsackievirus, respectively, are highly infectious. Age distribution of patients, 61 patients in Enteroviruses and 11 patients in coxsackievirus, respectively, occurred in 0 to 10 year-olds. The sex distribution of the patients is as follows, 52 males (62.7％), 31 females (37.3％). Occurrence rate was found to be higher in male patients. Electron micrograph of echovirus and coxsackievirus show that they are small nonenevolped, isometric-shaped viruses. Isolated RNA from strains of echovirus and coxsackievirus showing cytopathic effects were used to undergo nested PCR which resulted in a 437 bp single band in all the strains.

• Journal of the Korean Society of Earth Science Education
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• v.11 no.2
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• pp.145-157
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• 2018

The purpose of this study is to analyze the research trends in domestic related to gifted counseling by utilizing Sementic analysis methods. For papers of gifted education in korea, KCI(Korea Citation Index) rated journals were selected 83 pieces published in journals were collected and the Sementic Network Analysis(SNA) way was utilizing for keyword frequency and Centrality Network Analysis throughout a variety of research articles using krkwic and Ucinet6.0. The results are as follows. first, the analysis appeared that the trends of paper keywords from highest frequency of appearance keyword in papers focused on four keywords: perfectionism, career, counseling, and the science gifted. second, Analysis of annual trends from 2001 to June 2018 showed that the top keywords were as follows: the gifted underachievers, the perfectionism, the gifted students of Science, and the science gifted students. the rising keywords were perfectionism, twice-exceptional students, and gifted parents, and the keywords of gifted students and general students showed a tendency to decrease. Consequently, gifted counseling research should be done from various perspectives.

• The Korean Journal of Mycology
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• v.42 no.2
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• pp.104-132
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• 2014

This study was conducted to survey the diversity and distribution of mushrooms growing spontaneously on Jeju Island in the last eight years. Approximately 2,000 specimens of mushrooms were collected in Gotjawal, Hallasan Natural Park, and Oreum, the habitats where a rich diversity of mushrooms was expected, from 2006 to 2013. They were identified as 74 families, 213 genera and 511 species. Thus, including 69 families, 99 genera and 561 species from the previous study conducted in 2005, a total of 83 families, 257 genera and 740 species of wild mushrooms have been recorded. This study would support new information for fungal flora in Korea and preliminary data for further studies on mushroom diversity.

• Journal of the Korean earth science society
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• v.30 no.4
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• pp.513-526
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• 2009

It has long been that the unit of oceanic salinity changed from permil (%o) to other unit. However, the middle-and high- school textbooks of science and earth science have still used %o as salinity unit that was defined a long time ago. The objectives of this study are to briefly discuss about the historical development of change in salinity unit and measurement techniques, to present differences between the salinity units of psu (practical salinity unit) and %o, and to address the need and validity for the correction of salinity unit in the textbooks. Twenty-seven kinds of textbooks based on the 7th National Curriculum were analyzed to investigate the expression of salinity unit and the definition of salinity. The results were compared with the usage of salinity units in the articles published in Journal of Korean Society of Oceanography from 1967 to 2008. The percentages by the use of %o were 96.3% in the text and 83.8% in the graphs or tables of the textbooks. By contrast, the scientific papers began to use psu from 1994 and then %o has seldom been used since 2004.

• The Korean Journal of Financial Studies
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• v.6 no.1
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• pp.117-140
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• 2000

본 연구는 그간 실무계와 학계에서 주목을 받고 있는 EVA 모형과 기업가치모형간의 상호 관계를 보여주고 실증적으로 예측치 경상이익과 순이익을 이용하여 EVA와 기업가치를 측정하고 이러한 예측가치와 실제가치와의 관계를 살펴보았다. 1990년부터 5년간 모두 535 기업을 대상으로 분석한 결과 강효석과 남명수 (1998)의 연구와 같이 모든 연도에 부의 EVA를 보여 주고 있으며 1년 예측치보다 2년 예측치를 기초로 산정한 기업가치가 실제가치에 근접하였다. 각 연도 별로 보면 예상경상이익을 사용한 경우 70%부터 94%까지의 높은 설명력을 보여주며, 5년 누계는 83%의 설명력을 나타냈다. 경상이익 대신 순이익을 사용한 경우도 유사한 결과를 보여주고 있다. 끝으로 가치평가오차를 원천별로 그리고 유형별로 분석하였는데 기업가치 예측오차 중 경제전반이 설명하는 부분은 10%정도, 산업은 $13{\sim}15%$, 그리고 개별기업이 $75{\sim}77%$를 차지하고 있어 개별기업의 중요도가 미국에 비하여 낮은 수준을 보여주고 있다. 유형별로도 편의비율이나 회귀비율이 $5{\sim}8%$수준인데 비하여 무작위 비율이 86%수준을 보여 주고있다.

• Publications of The Korean Astronomical Society
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• v.5 no.1
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• pp.26-39
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• 1990

20cm 태양망원경이 소백산 천문대에서 대덕 천문우주과학연구소로 이전 설치된 후, 1987년 6월 19일 부터 1990년 11월 30일까지 흑점관측을 수행하여 343개의 흑점관측자료를 얻었다. 본 관측기간중 일일 평균 흑점상대수는 83.4로, 매일 평균 5개의 흑점군과 30개의 흑점이 관측되었다. 관측된 월평균 흑점상대수를 분석한 결과에 의하면 1986년 9월에 시작한 제22 태양활동 주기의 극대기는 1989년 9월경으로 밝혀졌다. 국제 흑점 상대수와 비교 가능한 292개의 관측 자료를 사용하여 대덕 태양망원경의 규격화 상수 K를 결정하였으며, 그 간은 소백산 천문대의 규격화 산수 0.87보다 큰 1.08로 밝혀진다.

• 월간 기계설비
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• no.2 s.211
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• pp.49-52
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• 2008

2008년 상반기 건설업 노임단가가 발표되었다. 대한건설협회가 발표한 2008년 상반기 건설업 임금현황에 따르면 상반기 적용 건설업 전체 평균임금이 하루 10만5천4백24원으로 작년 하반기에 비해 3.1%가 상승했다. 기계설비분야의 노임은 배관공이 83,392원으로 전년 하반기 대비 4.5% 상승했고 플랜트배관공이 117,001원으로 전년 하반기 대비 6.5% 올랐다. 이번 건설임금은 올 지난 해 9월 전국 공사현장에서 일하는 건설근로자 임금을 실제로 조사해 집계한 것으로 2008년 1월 1일부터 건설공사 원가계산에 적용 가능하다. 직종별 건설업 임금은 대한설비건설협회 홈페이지 (www.kmcca.or.kr)$\rightarrow$자료실)$\rightarrow$각종기준표)$\rightarrow$건설업임금실태에서 다운로드 받을 수 있다.

• Journal of The Korean Society of Grassland and Forage Science
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• v.11 no.4
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• pp.258-263
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• 1991

There are ten NLCF's recommended sorghum-sudangrass hybrids(Sorghum bicolor (L.) Moench), but they have not been evaluated under same environmental conditions. Therefore, a field experiment was conducted to campare forage yield and quality of the NLCF's recommended cultivars of sorghum-sudangrass hybrids at the experimental forage field, College of Agriculture, SNU, Suweon over two years. Among the ten cultivars used, G83F and NC+855 were classified as early maturing cultivars. Pioneer 988 and Sordan 79 were more resistant to leaf blight than the other hybrids. Jumbo, Sordan 79 and SX-17 were susceptible to lodging. No significant differences in dry matter yield were found among the cultivars used, but the dry matter yields of Pioneer 988, TE-Haygrazer and G83F were slightly higher than the other hybrids in 1989 and those of NC+855 and Pioneer 988 were higher in 1990. There were no marked cultivar differences in CP, ADF, NDF and RFV at the first, second and third cuts in 1990, but the ADF, NDF and RFV of sorghum-sudangrass hybrids at the third cut showed more higher than those of the first and second cut forage. In conclusion, there are no forage yield differences among the ten NLCF's recommended sorghum-sudangrass hybrids.