생체 부분 간이식 환자에게 있어서 간동맥의 조직학적 소견에 대한 연구

최문섭,이백권,박재구,이종원,안상태,정은선 大韓成形外科學會 2004 Archives of Plastic Surgery Vol.31 No.2

교차상장주식의 가격탐색과 임계오차수정모형

최문섭 한국국제경영관리학회 2011 국제경영리뷰 Vol.15 No.2

원주식과 교차상장주식 간의 가격수렴의 과정은 불연속일 수 있다. 동일통화환산 가격차이가 충분하다면 차익거래에 의해 수렴속도가 빠를 것이고, 그렇지 않다면 느릴 것이다. 환언하면, 교차상장주식이 원주식에 대해 갖는 프리미엄의 시간에 걸친 움직임은 임계치를 상회할 때(외국면)와 아닐 때(내국면)의 양국면으로 대별된다. 이때의 임계치는 차익거래의 거래비용 및 위험프리미엄 등이 포함된 실효손익분기차액이 되겠다. 이를 계량모형화하기 위해서 Harris et al.(1995, 2002)의 선형오차수정모형을 Balky and Fomby(1997)의 임계오차수정모형으로 확장한 후 토론토 주식거래소(Toronto Stock Exchange)에 상장된 캐나다 기업들의 원주식과 뉴욕주식거래소(New York Stock Exchange)에 상장된 교차상장주식의 가격탐색에 대한 거래소별 상대적 기여도(정보지분)를 추정한다. NYSE의 가격탐색에 대한 상대적 영향력이 시간에 걸쳐 증대됨을 볼 수 있다. 또한, 추정된 외국면 정보지분과 차익거래 임계차액은 내부정보의 상대적 척도와, 시장마찰, 유동성 및 기업수준 특질에 의해 영향을 받는 것으로 보인다. The adjustment to parity can be discontinuous for an original listing and its cross-listing: convergence may be quicker when the price deviation is sufficiently profitable, but otherwise slower. In other words, the dynamics of premiums on cross-listings fall into two regimes: within and beyond the threshold, i.e. the transaction costs and risk premiums of arbitrage. We complement Harris et al.’s (1995, 2002) linear error correction model to estimate the relative extent of market-respective contribution to price discovery (information share) of cross-listed pairs on the New York Stock Exchange (NYSE) and the Toronto Stock Exchange by considering threshold cointegration per Balke and Fomby (1997). Our beyond-threshold (outer-regime) information shares suggest an increasing influence by the NYSE on Canadian stocks over time. We find that the estimated outer-regime information shares and thresholds are typically affected by the relative degree of private information, market friction, and liquidity measures, and idiosyncratic firm-level characteristics.

Short-term safety of facial rejuvenation using an absorbable polydioxanone monofilament thread in patients with mild-to-moderate facial skin sagging

최문섭,변현섭,문형진 대한미용성형외과학회 2020 Archives of Aesthetic Plastic Surgery Vol.26 No.2

Background Facial rejuvenation techniques using thread lifts are performed by passing sutures under the facial skin to treat sagging and facial flaccidity, and their advantages include a relatively short recovery time and relatively small incisions. In this study, we describe the short-term safety of a facial rejuvenation technique involving an absorbable polydioxanone monofilament thread (Mint Lift) in patients with mild-to-moderate facial skin sagging. Methods The current multicenter, retrospective, case-series study was conducted in a total of 196 patients who visited the Grace Plastic Surgery Clinic or the Songdo IB Clinic between 2016 and 2018. The patients underwent insertion of the Mint Lift 43 and 17 in the deep temporal fascia and the deep subcutaneous layer, respectively. Of these patients, 179 met the eligibility criteria and their medical records were retrospectively reviewed. Results The patients comprised six men (3.4%) and 173 women (96.6%), with a mean age of 44.4±14.4 years. In our series, postoperative complications included ecchymosis (1.7%), infection (0.4%), thread extrusion (1.1%), and skin dimpling (1.5%). No cases of iatrogenic nerve injury were observed, and all postoperative complications spontaneously resolved. Conclusions The Mint Lift 43 and 17 may be safe for thread lifting in patients with mildto-moderate facial skin sagging. However, further long-term follow-up studies are warranted.

개인투자자 거래비의 대만 증시 우선주 할인율 결정에 한 연구

최문섭,최정화 한국재무관리학회 2018 財務管理硏究 Vol.35 No.4

The literature in corporate covernance dictates that the premium of common shares against their comparable preferred stocks is due to the voting right premium of commmon shareholders. Besides, recent studies find that the voting rights premium can vary across the borders due to the differences of legal origins and sovereign-level corporate governance. Furthermore, the time-series varions of common stock returns and preferred stock disounts in Korea are known to be determined by the individual trading weight that proxies for noise trader risk along with liquidity. This study finds that the discount of preferred shares listed on the Taiwan Stock Exchange is determined by the individual trading weight controlling for firm-level variables like the voting rights premium of common shareholders, the relative turnover of preferred shares, dividend per share or payout in the previous fiscal year, and for market-level variables like the market, size, value, and momentum strategy premium factors. This finding implies that noise trader risk exists in the Taiwan stock market and it is an important risk factor of asset returns there. 기업재무 문헌에서 보통주의 우선주 비 할증은 보통주주의 의결권에 의해 비롯됨이 알려져 있다. 아울러 최근 문헌상 연구에 따르면 법체계 국가수 지배구조의 차이에 따라 국가간 의결권리미엄의 차이가 날 수 있으며, 한국의 경우 개인투자자 비으로서 변되는 잡음거래자 험이 거래물량과 더불어 보통주 수익률 우선주의 보통주 비 할인율의 시계열 변화를 설명하는 것으로 알려져 있다. 본 연구는 만주식거래소에 상장된 우선주의 할인율을 결정하는데 있어 개인투자자 비이 통계유의인 험요인임을 보여다. 이 결과는 보통주주의 의결권리미엄, 우선주의 상 회율, 주당배당액 년도 배당여부 등의 기업 수 변수 Fama-French 4요인인 시장리미엄, 소형주 리미엄, 가치주리미엄 성략리미엄 등의 시장수 변수를 통제한 후에도 여히 유지된다. 이는 만 증시에 잡음거래자 험이 존재하며 자산 가격 결정에 요한 결정요인임을 함의한다.

Corporate Transparency, Product Innovation, and Shareholder Value: Evidence from Korean Pharmaceutical Listings

최문섭,이종국,황준호,이환웅 한국무역연구원 2014 무역연구 Vol.10 No.6

By constructing a novel proprietary pharmaceutical database, we assessed whether thecorporate transparency of Korean exchange-listed pharmaceutical companies affectsevent-study returns upon Korea Food and Drug Agency approvals of new drugs. Theempirical findings are as follows: First, the evidence is that new drugs are priced in theannouncement returns. Second, product innovation is appraised higher by the investors whenthe company is well-governed in terms of trading venue, R&D intensity, balance sheetvariables, payout policy, valuation, and years of operation. Lastly, shareholders are wealthierwith innovative new products promised by trustworthy managers.

산업폐수에서 농화한 미생물컨소시엄 CDIK-3에 의한 1,4-dioxane의 생분해에 영향을 미치는 물리화학적 요인

최문섭,최기승,오계헌 대한환경공학회 2020 대한환경공학회지 Vol.42 No.8

Objective:With the ultimate aim of application for effluent treatment, the relationships between 1,4-dioxane degradation by microbial consortium CDIK-3 and several relevant physicochemical environmental parameters were investigated. Methods:Microbial consortium CDIK-3 enriched from an industrial wastewater sample developed to grow aerobically with 1,4-dioxane as the sole carbon substrate was used to evaluate the degradation of 1,4-dioxane depending on the various environmental parameters and HPLC methodology was used to measure residual 1,4-dioxane in the test consortium. Results and Discussion:The microbial consortium, designated CDIK-3, was originally enriched from industrial wastewater sample. Complete depletion of 1,000 mg/L 1,4-dioxane was achieved in this experiment within 168 h. Effective 1,4-dioxane degradation was observed in slightly alkaline conditions (pH 8) and 30℃. The effect of supplemented carbon and nitrogen (e.g., glucose, yeast extract, ethylene glycol, tetrahydrofuran) on the 1,4-dioxane degradation by the CDIK-3 test culture was evaluated. The results indicated that the addition of glucose, yeast extract, or tetrahydrofuran accelerated bacterial growth compared to growth in the absence of supplemented carbons. In contrast, the addition of low concentrations (≤100 mg/L) of ethylene glycol accelerated 1,4-dioxane degradation, but the degradation of 1,4-dioxane was delayed in the culture to which high concentrations (≥200 mg/L) of ethylene glycol were added. Conclusions:1,4-Dioxane as a wastewater contaminant can be removed by the microbial consortium CDIK-3 enriched from industrial wastewater. Effective 1,4-dioxane removal was obtained by the control of various physicochemical parameters. These results provide clues for understanding improved 1,4-dioxane degradation by microbial consortium CDIK-3 with relevant environmental parameters and possible applications in the processing of industrial wastewater containing relatively high 1,4-dioxane concentrations. 목적:폐수처리에 적용하기 위한 궁극적인 목표를 가지고, 미생물컨소시엄 CDIK-3에 의한 1,4-dioxane 분해와 여러 가지 관련 물리화학적 환경요인들과의 관계를 조사하였다. 재료 및 방법:1,4-Dioxane을 유일한 탄소원으로 사용하여 호기적 조건에서 생장할 수 있는 미생물컨소시엄 CDIK-3를 산업폐수로부터 농화를 통해 확보하였다. 여러 가지 환경요인에 따른 1,4-dioxane의 분해를 평가하였으며, HPLC를 사용하여 1,4-dioxane의 농도를 측정하였다. 결과 및 토의:CDIK-3로 지정된 미생물컨소시엄은 원래 산업폐수로부터 농화되었다. 1,000 mg/L의 1,4-dioxane은 168시간 이내에 완전히 분해되었으며, 효율적인 1,4-dioxane 분해는 약알칼리성(pH 8)과 30℃에서 각각 관찰되었다. CDIK-3의 배양에서 1,4-dioxane 분해에 영향을 미치는 부가탄소원 및 질소원(예, glucose, yeast extract, ethylene glycol, tetrahydrofuran)의 효과를 조사하였다. 그 결과, glucose, yeast extract, 또는 tetrahydrofuran의 첨가는 부가탄소원을 첨가하지 않은 것과 비교하여, 1,4-dioxane의 분해를 향상되었다. 반면에 ethylene glycol은 저농도(≤100 mg/L)에서 1,4-dioxane 분해가 향상되었으나, 고농도(≥200 mg/L)가 첨가된 경우에는 1,4-dioxane 분해가 지연되었다. 결론:폐수오염물질인 1,4-dioxane은 산업폐수로부터 농화된 미생물컨소시엄 CDIK-3에 의해 제거될 수 있다. 다양한 물리화학적 요인의 조절을 통하여 효율적인 1,4-dioxane의 제거가 이루어졌다. 이러한 결과는 적절한 환경요인들 하에서 배양된 미생물컨소시엄 CDIK-3에 의해 1,4-dioxane 분해가 향상되는 것을 이해하는데 단서를 제공하며, 상대적으로 고농도의 1,4-dioxane을 포함하는 산업폐수의 처리에 적용될 수 있다.

傳來童謠에 대한 나의 생각

崔文燮 한국아동문학학회 1995 한국아동문학연구 Vol.- No.4

결막을 통한 바깥쪽 아래 눈꺼풀을 내리는 수술 (일명: 눈밑트임)

최문섭,김태형,황동연 대한미용성형외과학회 2012 Archives of Aesthetic Plastic Surgery Vol.18 No.1

Commonly, the lateral canthus is located higher than medial canthus and many people are often shown short lateral palpebral fissure. This seemed to be shown as wild, anxious, and pierced eye. Many surgeons have made desperate efforts to improve this by anchoring lateral canthus to lower part of orbital bone. But, authors would like to show the two-third portion of the lateral lower eyelid by anchoring to capsulopalpebral fascia via transconjunctival approach. Authors performed this operation since 2009 and first named it by “Nun-Mit-Teuim” in Korean. Key of this operation is that anchoring of the lower tarsus and capsulopalpebral fascia via transconjunctival approach without resection of skin. It is not necessary to remove a redundant conjunctiva. Commonly, the lateral canthoplasty is performed simultaneously to descend a lower eyelid easily. After the operation, it can be observed that the lower eyelid lift up a little bit for 1 2 weeks and redundant conjunctiva will be constricted in several months. The operation is defined as anchoring the lower tarsus to capsulopalpebral fascia. The limit of the operation is it cannot change the position of the lateral canthus. Over-lowering the lower eyelid to increase palpebral fissure, results in scleral show and unfavorable line. Thus, it is important that surgeons should remind the purpose and limitation of this operation.

State-Space Poisson Models for Event-Count Time Series: Evidence from the Legislative Productivity of the U.S. Congress

최문섭,福元健太郞 한국경영과학회 2014 經營 科學 Vol.31 No.4

For event-count time series data, the Poisson distribution is limited because it assumes independent events. In this study, we horserace two state-space Poisson methods in analyzing the legislative productivity of the U.S. Congress:the Poisson exponentially weighted moving average (PEWMA) and Poisson autoregressive (PAR) models. They distinguish from the conventional Poisson and negative binomial event-count models by explicitly specifying the time-series process in a Bayesian parameter-feedback context. We find that (1) a divided government does not matter for the legislative productivity of the U.S. Congress; but, (2) electoral consideration of lawmakers urges them to make more laws in the election year, and (3) wider-seat margin Senatorial majority legislate more.

발효된 물김치인 동치미에서 분리한 혼합 젖산균의 기능성 증진에 대한 연구

최문섭,김동민,오계헌 한국생물공학회 2015 KSBB Journal Vol.30 No.5

The aim of this work was to investigate the several functionalities of enhanced functionalities in cultures of single LAB (e.g., DK-3, DK-6, DK-13) and these three mixed LAB as probiotics isolated from Korean fermented watery Kimchi, Dongchimi. Both BIOLOG system and 16S rRNA sequencing were conducted to examine the characteristics and to identify the LAB strains, which were assigned to Leuconostoc mesenteroides DK-3, Leuconostoc dextranicum DK-6, and Lactobacillus curvatus DK-13, respectively. Phylogenetic analyses of the strains were plotted based on 16S rRNA sequence comparisons. Growth rate and pH changes during the growth, production of organic acids as metabolites, and as well as functional properties of the single and mixed LAB cultures were monitored and compared. In mixed LAB cultures after 72 h of incubation, maximum concentrations of lactic acid and acetic acid were approximately 340.5 mM and 191.9 mM, respectively, and pH was changed from 7.00 to 3.62. Mixed LAB cultures eliminated 96.3% of nitrite. Activities of antioxidant and β-galactosidase were 60.3% and 16.8 units/mg, respectively. Significant antibacterial activity of the concentrated supernatants was demonstrated against several foodpoisoning bacteria. Functionalities obtained from the mixed LAB cultures have been shown to be considerably higher than those of single LAB cultures. In consequence, these studies demonstrate that the all functionalities in mixed LAB cultures compared to the single cultures can be significantly enhanced