우폐하에 위치한 심막낭종 459 -1예 보고-

전현우,심성보,사영조,박재길,이선희 대한흉부외과학회 2007 Journal of Chest Surgery (J Chest Surg) Vol.40 No.6

심막낭종은 매우 드문 종격동 양성종양으로 대부분 우측 심장횡경막각에서 발생한다. 그러나 흉곽 내의 다른 부위에서도 드물게 발생할 수 있으며, 이런 경우 종격동에서 기원하는 다른 낭종 질환과의 감별진단에 주의를 기울여야 한다. 본 증례는 비전형적인 병소인 폐하부에 위치한 심막낭종을 비데오 흉강경을 이용하여 낭종제거술을 시행하고 문헌고찰과 함께 보고하는 바이다.

공기청정기의 현장적용평가를 통한 의료기관 내 공기오염물질 저감효율 파악

전현우,손종렬,최정숙,정백영,김주혁 한국퍼실리티매니지먼트학회 2019 한국퍼실리티매니지먼트학회지 Vol.14 No.2

According to a recent report on indoor air quality map conducted by the Ministry of Environment (2016-2017), the importance of indoor air quality in hospitals has emerged, with total airborne bacteria (82.3% and 149 cases) showing the highest number of facilities exceeding maintenance standards by contaminant. In particular, interest in the hospital environment is increasing as it is the living space of patients who are mostly vulnerable to pollutants. This study introduced an air purifier with decontamination function within the hospital facility, and the site application evaluation of the air purification system is given as a table of contents. The measurement items for the site application evaluation are fine dust, gross airborne bacteria, fungi, temperature and humidity, and the measuring equipment for each item is grimm dust spectrometer (model 1.108), Mars-100, and HOBO MX 1101. In the case of fine dust, the variation of fine dust can be seen through the measurement of the mining equation, and in the case of floating microorganisms (total airborne bacteria, bear Pangi) the impact method specified in the indoor air quality process test standards was collected, cultivated and quantified. Data were collected for conversion to CFU by counting after incubation of bioaerosol in case of temperature and humidity. The reduction efficiency is presented by comparing data before and after operation of the air purifier

Market Myopia - The Research about Response of Stock Price of R&D Investment Disclosure

전현우,정용화 한국상업교육학회 2009 상업교육연구 Vol.23 No.4

This paper investigates the market's response about long-term investment disclosure after separating the stock market before and after Financial crisis and analyse to focus on market myopia. First, we studied the end of the year settlement firm among the manufacturing industry that were made during the period 1993 to 2002 where the firm was listed on KRX. As a result, in market myopia, the hypothesis that R&D announcement happens negative move of stock price is rejected. R&D announcement of stock market is regarded as the positive signal which will produce the increasing of corporate income. Second, We divided the data into two samples by starting from Financial crisis. The first sample consists of the firm during 1993 to 1997, and the second sample consists of the firm during 1998 to 2002. Also we redivided each samples into three samples by own ratio.As a result, market myopia didn't exist before Financial crisis, but it existed after Financial crisis. As mentioned above, Investors don't think that any invest bring high expected cash flow to them because market circumstance is changed and uncertainty increase. Exactly, this implies the occurrence of the Market Myopia.

건강취약계층 이용시설을 대상으로 한 공기청정기 정화효율 평가 – 의료기관을 중심으로

전현우,손종렬,유송훈,김정운,김주혁 한국대기환경학회 2020 한국대기환경학회 학술대회논문집 Vol.2020 No.10

코스닥시장에서 상장폐지된 기업의 부실예측모형에 관한 실증적 연구: 비적정감사의견기업과 적정감사의견기업 간의 비교를 중심으로

전현우,정용화 한국상업교육학회 2012 商業敎育硏究 Vol.26 No.1

본 연구는 코스닥(KOSDAQ) 시장에서 특정기간(2009년 ∼ 2011년)동안 상장폐지된 기업들을 대상으로 재무적 특성을 파악한 후, 재무적 특성 중에서 재무비율을 가지고 로짓분석(Logit Analysis)을 통해 부실예측모형을 제시하였다. 그리고 상장폐지된 기업과 유사한 자산규모를 가지고 있는 정상적인 기업을 1대 1로 대응시켜서 이 두 그룹간 재무비율의 차이를 분석하고 이들에 대한 부실예측모형도 제시하였다. 본 연구는 7개의 재무비율을 이용하여 분석을 실시하였다. 이것들을 가지고 평균의 차이를 검정한 t-test결과, 현금성자산비율(CATA)을 제외한 모든 비율에서 정상적인 기업과 상장폐지된 기업 간에 유의한 차이가 존재하는 것으로 나타났다. 그런데 그 차이는 상장폐지 직전년도로 갈수록 더욱 큰 차이가 나타나고 있음을 확인할 수 있었다. 또한 부실예측을 파악하기 위해 단계적 회귀분석방법을 이용하여 로짓분석을 실시한 결과, 상장폐지 1년 전의 예측력이 83.8%, 2년 전의 예측력이 69.6% 등으로 나타났다. 그리고 선행연구에서 분석하지 않았던 부분인 상장폐지된 기업 중 감사의견의 적정성 여부에 따라 차이가 발생하는 지를 파악하기 위해 두 그룹으로 나누어 분석을 실시한 결과, 비적정감사의견을 받은 기업과 적정감사의견을 받은 기업 간의 재무비율에 있어서 유의적인 차이가 나타나지 않는 것으로 밝혀졌다. 이와 같은 결과를 토대로 적정감사의견을 받은 기업 중 상장폐지된 기업에 대한 감사의견의 적정성에 의문을 갖게 되었다. We researched the delisting firms’ financial characteristics and the failure prediction model using Logit analysis in KOSDAQ market. This research selected samples that was delisted firms at KOSDAQ market during 3 years from 2009 to 2011. And we matched normal firms with 1:1 matching method. Normal firms were selected with total asset. We analysed the Logit analysis with financial ratios and calculated T-value of mean difference between delisting firms and normal firms. The results shows the significant difference about two groups. Also the difference get become larger. We used the Backward elimination method. The results shows prediction capability is 83.8% before 1 years and 69.6% before 2 years. Also, we researched the suitability of auditors opinion about the delisting firms. The results shows the insignificant difference about two groups. And we got second thoughts about the suitability of auditors opinion of the delisting firms in Korea.

3자배정방식을 통한 기업가치와 재무성과의 연관성에 관한 연구

전현우,정용화,신동휴 한국상업교육학회 2012 商業敎育硏究 Vol.26 No.4

본 연구는 기업이 유상증자를 실시할 경우에 사용하는 방법 중의 하나인 제3자배정방식이 다른 유상증자방식들과 그 특성이 어떻게 다르고 이론적으로는 이것이 실제 기업에게 자금의 유입이 없 음에도 불구하고 기업가치에는 어떠한 영향을 줄 수 있을 것인가에 관하여 연구하고 실증분석을 수행하였다. 지금까지 선행연구들은 구주주배정방식과 제3자배정방식을 구분하지 않고 기업가치와의 연관성 을 분석하는데 주로 초점을 맞추었다. 그러나 본 연구는 제3자배정방식만으로 한정하여 그 중에서 도 출자전환을 목적으로 유상증자를 실시한 기업에 대하여 기존의 연구결과들과 어떠한 상이점이 있는 가를 분석하였다. 실증분석을 수행한 결과, 유상증자로 출자전환을 시행하는 기업은 불안한 재무구조를 개선하고 구조적 안정성을 유지하기 위하여 현금성 자산의 보유량을 늘리는 것으로 결론지을 수 있었으며, 기업의 재무구조 개선과 더불어 기업의 자산의 구조가 보다 효율적으로 바뀌었음을 알 수 있었다. 그리고 불필요한 비영업용 자산의 매각을 통한 효율적인 경영관리를 함으로써 이익구조가 보다 개 선되었음을 확인할 수 있었다. This paper investigates what is the difference between allotment to the third party and other capital increase. And we study how this method influences to evaluate corporate’s value without any real capital inflows. Until now, the prior studies mainly focused on analysis about correlation with corporate’s value without division of allotment to existing shareholders and allotment to the third party. But this study set limits to allotment to the third party. So we make clear the difference that existing result about capital increase in priority conversion of investment. Also, to investigate the effect of announcement of equity issues, allotment to the third party, on capital market, we were conducted on 21 firms from 2007 to 2010 and used market adjusted return model. The results are as follows, First, we found that capital increase with the method of conversion of investment is used to increase the cashable assets for improvement of the financial structure and the maintenance of structural stability. Also, we identified the changes to structure of assets. And we could identify the improvement on structure of income through the disposal of needless assets. Second, at the method of allotment to the third party, positive abnormal returns were observed on the event day. However, the negative abnormal returns were also observed after the announcement in the long run.

[전기인의 맛집] 경주를 닮은 곳, 고두반

전현우 대한전기협회 2016 전기저널 Vol.- No.477

골재기본성질에 따른 배합설계

전현우 한국농공학회 1973 한국농공학회논문집 Vol.15 No.2

The aggregate materials being scottored in districts of the country were investigated to provide the data to the Consturction worker who are working without quality tests of construction materials in the small scale land consolidation, farm building construction and new village Construction projects in the country. Also results of the survey will be helpful to those who want to devise a succerrful plan in concrete execution by means of specifying a standard and technical treatment of construction materials.

L-글루탐산 탈수소효소 동위효소의 세포내 분포

全鉉禹,朴在允,李根培 朝鮮大學校 醫學硏究所 1982 The Medical Journal of Chosun University Vol.7 No.-

NAD^(+)-linked glutamate dehydrogenase(L-glutamate : NAD^(+) oxidoreductase, desminating, EC 1.4.1.3) of rabbit erythrocytes during cytosol differentiation has been studied. The rabbits were injected with phenylhtdrazine on day 0.1 and 3 at intervals, the blood samples were taken by cardiac puncture, and the activity of glutamate dehydrogenase in cytosolic and mitochondrial fraction of reticulocytes was assayed by the method of King. The results observed were as follows: 1. Activity of cytosolic glutamate dehydrogenase was about 4.0 unit from normal rabbit erythrocyte, however no appreciable enzyme activity was found in mitochomdrial fraction. 2. In phenylhydrazine-produced reticulocytosis, the total glutamate dehydrogenase activity was maximal on 5 day, about 34.5mits which is abouty 8.3 times higher than that of normal value. 3. The increase in total activity of glutamate dehydrogenase during the induction of reticulocytosis was primarily to 6.7 folds increase in the cytoselic isozyme(K_(s)=0.01161 ; K_(d)=0.0043 ; t1/2=161.16 hrs.), for mitochondrial isozyme(K_(s)=0.0675, K_(d)=0.090 ; t1/2=77.0 hrs). 4. The rate of constants follwing recovery from phenylhydrazine treatment were, Ks=0.0161, K_(d)=0.0320; 1/2=21.66 hrs, for cytosolic isozyme and K_(s)=0.0916 ; K_(d)=0.0229 ; t1/2=30.26 hrs, for mitochondrial isozyme.

培養한 人體口腔 上皮細胞의 成長에 미치는 Epidermal Growth Factor의 影響

全鉉禹,朴鍾琇,李永卓,李仁洙,朴周鴻,曹永俊,高光三 中央醫學社 1988 中央醫學 Vol.53 No.4