동맥혈 채혈후 시간 경과 및 온도 변화가 가스분압 및 PH 에 미치는 영향에 관한 연구

김동수,이승환,김건식,강화자,신광일,여민구 대한마취과학회 1989 Korean Journal of Anesthesiology Vol.22 No.6

Blood gas samples are highly susceptible to preanalytic error due to improper methods of obtaining or handling the sample prior to delivery to the laboratory. The errors in the measurement of blood gas analysis are currently derived from the exposure of sample to atmosphere, effects of anticoagulant itself, temperature difference between the measuring electrode and drawn blood and the delay in running the sample. To study the effects of the delay in measuring the sample and the temperature difference between the measuring electrode and drawn blood on values of blood gases and pH, we analyzed the arterial sampling from the 24 patients who were taking elective surgery or on his/her recovery period with indwelling arterial catheter. The plastic sampling syringes were kept at 4。C (refrigerator) or 22。-24。C (room temperature) and analyzed at regular intervals (1, 10, 30, 60,120 min) for 120 minutes. The following results were obtained: 1) When the arterial blood drawn from the anesthetized patients were stored 4。C, partial pressure of oxygen (PaO₂) decreased significantly after 20 min, whereas those stored at room temperature decreased significantly after 10 min. 2) When the arterial blood drawn from the recovery patients were stored at 4。C, PaO₂ did not decrease significantly through the experimental period of 120 min. Although those stored at room temperature did not decrease significantly through the period of 120 min. 3) Partial pressure of carbon dioxide in the arterial blood (PaCO₂,) drawn from the anesthetized patients increased significantly by 120 min. at 4。C, whereas those at room temperature increased significantly after 20 min. 4) PaCO₂, of the recovery patients increased signigicantly by 120 min. at 4。C, whereas those at room temperature increased significantly after 30 min. 5) pH of the arterial blood drawn from either anesthetized or recovery patients decreased significantly by 120 min. at 4。C, whereas those at room temperature decreased significantly after 60 min. 6) No significant changes al oxygen saturation (SaO₂) and content (CaO₂) were noted in either anesthetized or recovery. patients in accordance with time elapsed at 4。C or room temperature. In summary, as the changes of PO₂ in particular higher than physiologic PO₂ and PCO₂ in the arterial blood stored at room temperature are significant in accordance with the delay in measuring, it would be advisable to analyze the sample in a short period of time or to store it in a cool place when the measuring will be delayed.

Precise determination of the lithium isotope ratio in geological samples using MC-ICP-MS with cool plasma

Choi, Min Seok,Ryu, Jong-Sik,Park, Ha Yan,Lee, Kwang-Sik,Kil, Youngwoo,Shin, Hyung Seon The Royal Society of Chemistry 2013 Journal of analytical atomic spectrometry Vol.28 No.4

<P>Lithium has two naturally occurring isotopes, <SUP>6</SUP>Li and <SUP>7</SUP>Li, with approximate relative abundances of 7.5% and 92.5%, respectively. Due to large Li isotope variations in nature, lithium isotopes have the potential to reveal important information relevant to nuclear technology, biomedicine, astrophysics, and geochemistry. With the advent of multi-collector inductively coupled mass spectrometry (MC-ICP-MS), studies of Li isotopes have largely focused on the analysis of geological materials, with varying degrees of accuracy. However, this technique has often been affected by either baseline interferences or isobaric interferences on mass 6 and 7 during ionization in Ar plasma, which is mainly due to the Li compound with hydrogen gas, and double-charged nitrogen and carbon ions at higher levels of RF power. In this study, we reduced baseline interferences in Ar plasma using a cool plasma (∼800 W) technique with a X-type cone. Lithium was separated using a cation exchange column (BioRad AG50W-X8, 200–400 mesh) with a mixture of 6 N HNO<SUB>3</SUB> and 80% methanol at <0.2 mL min<SUP>−1</SUP> elution speed. The short-term reproducibility of <I>δ</I><SUP>7</SUP>Li values of the NASS-5 seawater standard was 30.55 ± 0.45‰ (2<I>σ</I>, <I>n</I> = 15). Measured <I>δ</I><SUP>7</SUP>Li values of rock and seawater standards ranged from 2.48 to 30.55‰, in good agreements with reported values.</P> <P>Graphic Abstract</P><P>Average <I>δ</I><SUP>7</SUP>Li values of a pure L-SVEC Li solution and one passed through the column were 0.00 ± 0.23‰ (2<I>σ</I>, <I>n</I> = 26) and ¬0.01 ± 0.20 ‰ (2<I>σ</I> , <I>n</I> = 9), respectively, indicating that our chemical separation procedure for Li induces no mass fractionation. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2ja30293d'> </P>

賣渡者옵션이 T-bond 先物價格에 미치는 影響

申敏植,李俊植 慶北大學校 經濟經營硏究所 1994 經商論集 Vol.22 No.2-3

二項옵션 價格決定模型에 관한 硏究

申敏植 慶北大學校 經濟經營硏究所 1987 經濟經營硏究 Vol.3 No.-

This paper develops a complete binomial option pricing model. Although the mathematics of the model are quite simple, especially when compared to the Black-Scholes option pricing model, the economics of both models to option pricing are essentially same. Thus, the binomial model opens the door to the understanding of modern option pricing theory without the added complications associated with the solutions to stochastic differential equations. Moreover, the binomial model contains the Black-Scholes model as limiting case. The binomial model is written below so that it can be readily compared with the Black-Scholes model. Binomial model; C=SB(k≥a|n,p')-Xr^-nB(k≥a|n,p') Black-Scholes model; C=SN(d_1)-Xe^-rfTN(d_2) The two models look very similar. The variables S and X are exactly the same. Cox, Ross, and Rubinstein(1979) have proven that as n→∞ the two models converge, because r^-n→e^-rfT, B(k≥a|n,p')→N(d_1), and B(k≥a|n,p')→N(d_2). The binomial approach may be employed to value American options. If a stock pays a dividend, it may sometimes pay to prematurely exercise a call option on the stock before the dividend is paid rather than hold the option when the stock is almost certain to decline in value. Thus, one would expect American call options on dividend paying stocks to be worth than their European counterparts. On the other hand, if a stock is expected to pay a dividend, it is less likely that an American put option will be exercised prematurely since the stock is likely to decrease in value when the dividend is paid due to the ex-dividend effect.

RSA 암호화 알고리즘의 구현에 관한 연구

신인철,이민섭,박창섭,김범식,우찬일,최춘수 단국대학교 1998 論文集 Vol.33 No.-

Recently, the information exchange through a communication network has been increased rapidly. When the sensitive information being sent or stored, the cryptographic technique can be employed in order to prevent it from being exposed or modified by the illegal third party. To implement public key encryption systems based on the integer factorization and the discrete logaritm problem, an efficient exponential arithmetic is mandatory due to large numbers involved. In this paper, the general analysis about the high­speed implementation of primality testing and exponentiations are investigated as well as implementing RSA public­key system. The public­key cryptosystem can be applied to any applications which need both the privacy and the authentication. Finally, suing the software package named MIRACL which provides the basic number theoretic routines for cryptographic software developers. we have implemented the RSA encryption and decryption with Blum­Goldwasser probabilistic algorithm under various key and message size.

銀行의 簿外去來에 대한 規制論議

申敏植,李俊植 慶北大學校出版部 1994 經商論集 Vol.22 No.4

ABAQUS를 이용한 휨벽체의 비선형 유한요소 해석기법

한민기,박완신,한병찬,황선경,최창식,윤현도 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

The finite element method(FEM) models were developed for the reinforced concrete flexural walls and analysed under constant axial and monotonic lateral load using ABAQUS. The major objective of the present study is to determine if the ABAQUS finite element program can be used to accurately model the post-cracked mode of failure in plastic regions of walls, and, if so, to develop practical failure criteria in the plastic range of the material response. The research comprises constitutive models to represent behavior of the materials that compose a wall on the basis of experimental data, development of techniques that are appropriate for analysis of reinforced concrete structures, verification, and calibration of the global model for reinforced concrete walls of increasing complexity. The proposed FEA technique is verified by Lefas's benchmark data. Results from the analyses of these FEM models offers significant insight into the flexural behavior of benchmark data.

통년성 알레르기성 비염(Perennial allergic rhinitis)에 대한 아크리바스틴(Semprair)^(�)의 임상효과

김민식,신민호,조승호,서병도 최신의학사 1992 最新醫學 Vol.35 No.2

Hydrotalcite의 製造條件에 關한 硏究

안세민,신화우,최광식,이광표,장영수 원광대학교 식품약품안전성연구소 1993 食品藥品安全性硏究 Vol.6 No.-

Hydrotalcite is mainly used as a antacid and adsorbent. It is Well Known that the yield of hydrotalcite produced is greatly affected by the preparation conbition such as the reactant concetration, reaction temperature, reaction time, mole ratio of reactants and grying tepeeature, etc. the purpose of this study is to investigate the optimum preparation condition of hydrotalcite. Arandomived complete block design suggested by G.E.P.Box and K.B. Wilson was appliedfor this purpose. Hydrotalcite was prepared by reacting sodium carbonate. Magnesium oxide and Aluminum sulfate solutions in this study. The optimum preparation condition of hydrotalcite obtained from this study is as follows: 1) The reaction temperature range is 48-63℃ 2) The concentration of reactant solutions is about 20% 3) The optimum mole-ratio (MgO/Al. sulfate) is 7.35-8.1. 4) The reacting time tatge is 10-11 min.. 5) The drying temperature range is 78-82℃ The outcome of D.S.C. indicated a desolvation of hydrotalcite occured at about 98℃ The dehydration of the compound ceased at about 250℃, and the decarboxylation ceased at about 446℃ The physical and chemical properties of hydrotalcite as medicine were studied by use of chemical analysis, bulk volume test and acid consuming capacity measurements.

유산소성 운동이 비만 아동의 신체 구성, 혈액 성분 및 기초 체력에 미치는 효과

박기용,신민식,최경훈 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

This study aims on examining the effect of aerobic exercise program on obese children's body composition, blood components and basic physical strength, and on searching for effective management method for betterment on obesity. After 9-weeks experiment subjecting 10 obese children(who were divided into control group and over-burden group), and I got following results. 1. On the point of the effect on body composition, there was meaningful difference in weight and BMI item, was not meaningful difference in %fat and Skinfold thickness but was decrease trend in average. 2. On the point of the effect on blood components, there was no meaningful difference in all items, but Triglyceride, Blood pressure, Blood glucose average were decreased and HDL-C average was increased. 3. On the point of the effect on basic physical strength, there was meaningful difference in 50M dash, Standing long jump, Sit-up. There was no meaningful difference in Sit and reach, 1000M run-walk but was improving trend in average. 4. On the point of the effect according to the program management methods, there was meaningful difference in BMI, 50M dash, Standing long jump in control group. There was not meaningful in Midaxilary Skinfold thickness, Standing long jump, Sit-up, 1000M run-walk in over-burden group. Although there was no meaningful difference in the change of blood components and %fat, there was wide decrease in average in over-burden group.