http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
金熙澈 中央醫學社 1964 中央醫學 Vol.6 No.5
It is well known that Ca is absorbed in the upper part of small intestine and various factors are influenced the absorption. Prevously, several experiments about the factors influencing of Ca absorption have been reported. But all of them applied the indirect methods of calculation though giving the nutrients by mouth or injection of Ca salts. Above experiments, It is hard to gain the real degree of the intestinal absorption and find out inhibitory factors upon the absorption. In this paper, the direct method was applied; Cutting of a small intestine from the plica duodenojejunalis with the length of 30cm though this operation much attention were paid in avoiding the impairment of the blood vessels and lympatics. After charging the dissolved substances in buffer solution of pH 6,6 to the separated part of the intestine, calculation were made upon the absorption of Ca in a certain time. And observed the amount of Ca absorbed by intestine when Ca solution were charged with sugars, organic acids, vitamins, and the influences @f various pH. The results of experiments are summerised as follows: 1) The rate of Ca absorption is enhanced during first one hour but limited within some degree. 2) When the concentratin of Ca is high, more Ca is absorbed by the gut than low concentration is used, but this increaced absorption is not proportional to its concentration. 3) pH value of 5.0 and 0 showed the favorabl for Ca absorption. 4) Vhonosaccarides such as glucose, fructose seemed no influence on Ca absorption. 5) Various kinds of organic acids show irigenerally inhibitory action upon the absorption, especially oxalic acid is more prominently. 6) Various kinds of vitamins have different effects on Ca absorption, vitamin A & D, B₂, K₃, promote, vitamin Br on influence and vitamin C inhibit.
다항 위험함수에 근거한 NHPP 소프트웨어 신뢰성장모형에 관한 연구
김희철 (사)디지털산업정보학회 2011 디지털산업정보학회논문지 Vol.7 No.4
Infinite failure NHPP models presented in the literature exhibit either constant, monotonic increasing or monotonic decreasing failure occurrence rate per fault (hazard function). This infinite non-homogeneous Poisson process is model which reflects the possibility of introducing new faults when correcting or modifying the software. In this paper, polynomial hazard function have been proposed, which can efficiency application for software reliability. Algorithm for estimating the parameters used to maximum likelihood estimator and bisection method. Model selection based on mean square error and the coefficient of determination for the sake of efficient model were employed. In numerical example, log power time model of the existing model in this area and the polynomial hazard function model were compared using failure interval time. Because polynomial hazard function model is more efficient in terms of reliability, polynomial hazard function model as an alternative to the existing model also were able to confirm that can use in this area.
증권발행인의 정보제공의무에 관한 고찰 - 증권의 발행시장을 중심으로 -
김희철 한국기업법학회 2007 企業法硏究 Vol.21 No.2
As Judge Brandeis said, "Publicity is justly commended as a remedy for social and industrial diseases. Sunlight is said to be the best of disinfectants; electric light the most efficient policeman." The Korean Securities Exchange Act is based on the "Sunlight." Still, however, there are some clouds in the blue sky. Both of the registered or privately placed securities issuers are supposed to owe duty to disclose the information about the issuers. For the listed securities issuers', the United States' Securities Act of 1933 or Korean Securities Exchange Act requires to fulfil disclose duty. The Korean Securities Exchange Act, however, is not enough to protect investors omitting the disclose duties. For example, the issuer do not have to deliver prospectus unless the investor requires to do so. For the unlisted ones, the United States' common law or other Europe countries' pre-contractual obligation of disclosure placed on the other party enhance the duty, either. Both of the Korean Courts and Korean securities professors, however, have mistakenly been considered that the private placement does not covered by the Securities Exchange Act at all. By good fortune, the Korean Supreme Court judged that the fraud using privately placed securities as well as omission or misrepresentation can be covered by Securities Exchange Act, recently. Comparing the United States' duty to disclose regulations with the Korean ones, the author indicates the lack of the regulatory requirement of the duty, or laissez-faire of protecting investors.
유공형 강판으로 전단 보강한 넓은 보의 전단강도 설계 규준비교 분석
김희철,김민숙,고명준,박종일,이영학 한국방재학회 2016 한국방재학회논문집 Vol.16 No.1
In this paper, shear capacity of wide beam reinforced with steel plate with openings was evaluated. Three non-shear reinforced specimens and eight shear reinforced specimens were tested. Test results were compared with shear equations provided from the design provisions, KCI-12 and CS0A A23.3-04. Effective depth of beam, transverse spacing of shear reinforcement and width of support were considered as variables. Test results showed that the shear strength increased as the transverse spacing of shear reinforcements decreased while shear strength decreased as the width of support decreased. 본 논문은 유공형 강판으로 전단 보강한 넓은 보의 전단파괴 실험을 수행하여 전단보강재의 전단성능을 평가하였다. 무보강 시험체와유공형 강판으로 전단 보강된 총 11개의 시험체를 전단파괴 실험을 통해 계측한 전단강도와 KCI-12, CSA A23.3-04 설계규준의 전단식을 통해 얻은 전단강도와의 비교·평가하였다. 또한 보의 유효깊이, 횡방향 전단 보강재의 간격, 지지부의 폭을 변수로 하여 넓은 보의 전단강도에 미치는 영향을 분석하였다. 이를 통해 횡방향 전단 보강재의 간격이 줄어들수록 전단강도가 증가하고 지지부 폭이 줄어들수록 전단강도가 감소하는 것을 확인하였다.
Semi-classical Monopole Operators in Chern-Simons-Matter Theories
김희철,김석 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.71 No.10
We construct classical solutions for magnetic monopole operators in N =6 superconformal Chern- Simons-matter theories. In particular, we explicitly find solutions with unequal magnetic flux contents in the two U(N) gauge groups, whose existence has been known only indirectly. We also study the ground state degeneracies of the U(2)×U(2) monopoles by quantizing the moduli of the solution.