• Magazine of korean Tunnelling and Underground Space Association
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• v.25 no.2
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• pp.27-40
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• 2023

• Magazine of korean Tunnelling and Underground Space Association
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• v.23 no.1
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• pp.5-13
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• 2021

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.186-187
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• 2023

한나라호에 구축된 시스템에서 VSAT 통신망을 통해 전달되는 영상이 차지하는 데이터의 크기와 고려되어야 하는 상황에 대한 문제를 연구하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.394-395
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• 2022

스마트쉽 솔루션 SEES는 선박의 정보를 육상으로 전달하며, 실제 적용된 프로젝트 사례를 보며 무선통신망에서 생기는 지연에 대한 문제를 연구하고자 한다.

• Korean Journal of Clinical Laboratory Science
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• v.48 no.1
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• pp.15-21
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• 2016

Aspergillus is the most common opportunistic fungus causing infection. Aspergillus is the most morphologically identified in the laboratory. Recently, molecular genetic methods have been proposed for identification of fungi that unidentified morphologically or identified genus level. Of 475 cases of Aspergillus isolated from clinical specimens, there were Aspergillus fumigatus 257 (54.1%), A. niger 101 (21.3%), A. flavus 43 (9.1%), A. terreus 29 (6.1%), Aspergillus nidulans 2 (0.4%), Aspergillus clavatus 1 (0.2%), and the Aspergillus species 42 (8.8%). Eleven cases of unidentified or identified at the genus level included Aspergillus fumigatus 5, Aspergillus falvus 1, Aspergillus terreus 1, and Aspergillus lentulus 1 was identified in the sequencing of the strain level. It was identified as Aspergillus versicolor 2, and Emericella parvathecia 1. 92.2% of Aspergillus was identified as a possible morphological, 8.8% could not be identified at the species level. Sequence-based molecular analysis using the ITS and D1D2 is considered useful for identification of the species level.

• Journal of Food Hygiene and Safety
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• v.16 no.3
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• pp.159-167
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• 2001

Staphylocorccus aureus is gram positive, facultatively anaerobic, non-sporulative coccus, and positive for coagulase and DNase. The food-poisoning outbreak of Staphylococcus aureus increases in the world, and third occurrence happened in our country. Of 105 isolates (25.4%) obtained 413 focal samples of food-poisoning suspicious patients. In those cases, the enterotoxins were detected from a total of 45 isolates (42.9%), 9 isolates(20.0%) were A type, 33 isolates (73.3%) were H types, 2 isolates (4.4%) were G type and 1 isolate was a I type enterotoxin. Among the isolates possessing staphylococcal enterotoxins, 29 isolates had H type only(64.4%), 5 isolates had A type only and 4 isolates had both A and H type. Two isolates had G type only and 1 isolate had I type only. In the antibiotic susceptibility, 48 isolates (46%) had at least one antibiotic resistance among 105 isolates, 34 isolates (70.8%) were resistant to penicillin. 1 isolate (2.1%) to ampicillin, 3 isolates (6.3%) to erythromycin and kanamycin. Seven were resistant to more than two antibiotics and especially 1 isolate was resistant to penicillin-ampicillin-nitrofurantoin.

• Journal of the Korea Convergence Society
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• v.11 no.8
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• pp.165-171
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• 2020

Most of the stock price prediction research using text mining uses news and SNS data. However, there is a weakness that it is difficult to get honest and vivid information about companies from them. This paper deals with the problem of the prediction for the direction of stock price by doing text mining the online company reviews of internal staff indicating employee satisfaction. The comparative analysis of the prediction models for the direction of stock price showed the prediction model, which adds internal employee reviews, has better performance than those that did not. This paper presents the convergence study using natural language processing in financial engineering. In the field of stock price prediction, This paper pursued a new methodology that used employee satisfaction. In practice, it is expected to provide useful information in the field of forecasting stock price direction.

• The Korean Journal of Financial Studies
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• v.6 no.1
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• pp.203-221
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• 2000

본 연구는 선진국들의 주가변동이 우리나라 증시에 미치는 영향, 아시아 각국과 우리나라 주가변동의 상관관계, 우리나라와 이들 국가간 주가변동 상관관계의 시계열적 안정성, 우리나라와 이들 국가간 주가변동 전이의 방향 및 시차에 관하여 분석 하였다. 우리나라 증시 개방시점을 전후하여 1981년 1월$\sim$1991년 12월을 제1기간, 1992년 1월$\sim$1999년 8월을 제2기간으로 한 각국 주가지수의 월별수익률과 1999년 1월 4일$\sim$1999년 8월 24일 기간중 각국 주가지수의 일별수익률을 자료로 상관분석과 회귀분석을 실시한 결과는 다음과 같다. 첫째, 우리나라 증시에 영향을 미친 선진국으로는 제1기간중에는 영국, 일본, 미국의 순이며, 제2기간중에는 전적으로 일본과의 상관관계가 높게 나타났다. 특히 일본과의 상관관계는 제1기간보다도 제2기간중에 더욱 상승하였다. 또한 선진국들 간에는 독일, 영국, 프랑스 3국간 주가변동의 상관관계가 높게 나타났다. 둘째, 아시아 각국과 우리나라의 상관관계분석에서는 태국, 인도네시아, 말레이시아와는 상관관계가 높게 나타났으나, 대만, 싱가폴과는 상관관계가 비교적 낮게 나타났다. 그리고 아시아 각국간에는 홍콩, 말레이시아, 태국, 인도네시아 국가들의 상호간 상관관계가 높게 나타났다. 셋째, 상관관계의 시계열 안정성에 관한 분석에서는 1995년 이전까지는 전체적으로 우리나라와 각국간 주가변동의 상관관계가 낮거나 국가별로 매우 불안정한 상태를 나타내고 있으나, 1996년 이후부터는 상관관계가 점점 높아지는 추세에서 1998년도에만 우리나라의 IMF충격으로 인하여 일부국가들과의 상관관계가 일시적으로 낮아진 상태를 보이고 있다. 개별국가별로는 우리나라와 일본과의 상관관계가 지속적으로 높아지고 있으며 태국, 인도네시아와는 IMF사태이후 크게 높아진 것으로 나타났다. 넷째, 주가변동방향 및 시차분석에서는 미국, 영국, 독일의 주가변동이 1일의 시차를 두고 우리나라에 영향을 미치고 있으며, 일본을 비롯한 동남아 각국과 우리나라간에는 주가변동에 시차가 없는 것으로 나타났다. 그러나 각국간 표준시차 및 거래소 거래시간을 고려하면 미국, 영국, 독일의 경우에도 그 시차는 1일이내이거나 거의 시차가 없는 것으로 판단된다.

• Management & Information Systems Review
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• v.28 no.3
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• pp.25-44
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• 2009

The purpose of this paper is to examine the determinants which cause a price differential between common and preferred stock. Prior studies have shown that variables like liquidity, size, the number of outstanding shares issued can explain the price differential between common and preferred stock price. Based on year 2006 through year 2008 data, we analyzed the determinants using regression model. Dummy variables representing large/small company and KSE/KOSDAQ respectively are added and analyzed as independent variables. The firm size, trade volume turnover, and the number of preferred shares to total outstanding shares were proved to make influence on the price differential under the 5% significance level. Especially, we have found the number of preferred shares to total outstanding shares provide the most strong relationship with the price differential. This means that a high ratio of preferred stock to total outstanding shares leads to relatively high value of common stock and causes a big price differential.

• The Journal of the Korea Contents Association
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• v.10 no.11
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• pp.198-208
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• 2010

The purpose of this study was examined the effects of the K-MBSR program according to the length of the training period. Three versions of the K-MBSR program were compared: a 4-week program composed of formal meditation an 8-week program with official meditation and a 12-week program that combined the 4-week and 8-week programs. The 4-week K-MBSR program did not result in a significant decrease in depression, anxiety, or negative emotion. The 8-week and 12-week K-MBSR programs decreased the score of depression significantly, and the effect continued until 8 months. The effect of the 12-week K-MBSR program was greaterthan the effect of the 8-week program, but not significantly. The result of this study indicates that the effect of the 4-week K-MBSR program appears insignificant. The effects of the 8-week and 12-week programs are almost the same, but the effect of 12-week K-MBSR program showed a slightly greater effect in the post-test and 8-month test. The findings were discussed the effect of k-MBSR Program and recommendations for further research.