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정규분포를 활용한 이불과 가방에 대한 화재 하중 예측 방안 연구
김현도,남동군,조성우 한국화재소방학회 2015 한국화재소방학회논문지 Vol.29 No.4
본 연구에서는 전통시장에서 취급하는 대표적 가연 물품인 이불과 가방을 취급하는 점포를 선정하고, 이에 대한 화재하중을 예측하여 향후 전통시장의 화재확산지연을 위한 방화구획 설정에 필요한 기초자료를 제공하는데 목적을 두고 있으며, 표준정규분포를 활용하여 공극률을 근거로 하여 화재하중을 구하였다. 이불의 평균 공극률은 98.7%, 가방의 평균공극률은 94.39%로 나타났고, 이를 토대로 화재하중을 계산할 결과, 이불은 29.9 kg/m2, 가방은 65.61 kg/m2로 나타났다. This study suggests basic data for fire-resistant compartments to prevent fires from spreading in a traditional markets. As representative combustible goods handled in traditional markets, bedding and bags were chosen. The fire loads couldbe calculated using the porosity of the materials based on a standard normal distribution. The bedding and bag porositywere 98.7%, and 94.39%, respectively. The the fire load of bedding is 29.9 kg/m2, and that of bags is 65.61 kg/m2.
김현도 한국국제경영학회 2023 國際經營硏究 Vol.34 No.4
In this study, I investigate the role of a U.S. CEO’s job security level and long-term incentive compensation on the firm’s corporate social responsibility (CSR) investment under the various financial circumstances. Nowadays, empirical research supports the view that investments in the CSR of a firm have a positive impact on the financial performance of the firm at least in the long run. However, many managers still consider investments in the CSR merely as unnecessary costs and do not invest in the CSR because they are usually evaluated and paid based on their short-term financial performance. As a solution to this kind of agency problem, stock options which cannot be exercised quickly provide managers with better incentives to pursue long-term corporate objectives, instead of short- term ones, but the pursuit of long-term objectives could also be undermined by the risk of the early termination of the term. With the sample of U.S. listed firms from 1992 to 2013, I implement multivariate regression analyses with interaction terms. I find that firms with more protection from short-term managerial turnovers and/or more long-term incentive compensation scheme exhibit better corporate social performance. Moreover, the effects vary with business cycles and a firm’s financial status.
Janthinobacterium sp. 유래 저온 활성 프로테아제 정제
김현도,최종일 한국미생물·생명공학회 2018 한국미생물·생명공학회지 Vol.46 No.2
In this study, purification of cold-adapted protease from Janthinobacterium sp. was investigated. First, using gradient precipitation, protease was confirmed to be deposited in the 30−80% range of ammonium sulfate. Next, DEAE-Sepharose column was used for the binding of the protease under various conditions. The optimal binding condition was found to be pH 8.5 and flow rate of 30 ml/h. Under the optimal condition, the protease was purified with 29% recovery yield. This result can be useful for the purification of other cold-adapted protein.
웅담이 CCl<sub>4</sub>로 유발된 mouse의 간 손상에 미치는 영향
김현도,이규재,박승규,권기록,Kim, Hyun-Do,Lee, Kyu-Jae,Park, Seong-Kyu,Kwon, Ki-Rok 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.3
Objectives : This study was aimed at investigating liver protection mechanism of bear bile juice (Fel Ursi)by inducing liver toxicity through $CCl_4$ in mice and evaluated histological and serological findings. Methods : Experiment groups was categorized into untreated normal group, $CCl_4$ treated control group, and orally administered bear bile juice experiment group. At the termination of experiment, gross examination of the liver as well as histological findings, and Total protein, Albumin, Total bilirubin, Direct bilirubin SGOT, SGPT, and ALP contents in the serum were evaluated. Results : 1. For gross examination and histological findings, $CCI_4$ treated control group showed destroyed lobular structure, increased fibrosis, as well as hepatic cirrhosis. For the group treated with bear bile juice, the lobular structure suffered less damage, and showed lower level of fibrosis and liver cirrhosis compared to the control group. 2. For serum analysis, Total protein and Albumin were significantly increased in the bear bile juice experiment group than the control group. Total bilirubin and Direct bilirubin didn't show significant differences between the two groups. SOOT, SGPT, and ALP were significantly decreased in the normal and bear bile juice experiment groups compared to the control group. Conclusion : Taken together, bear bile juice can be effectively used for recovering the liver functions and further researches must be conducted to verify the efficacies of bear bile juice.