최근 10년간 원광의대병원에서 시행한 소아 심장혈관 수술의 임상적 고찰

윤향석,정수미,최두영,오광수,오연균,김종덕,양현웅,이삼윤,김형곤,최종범,최순호,노병석 圓光大學校 醫科學硏究所 1995 圓光醫科學 Vol.11 No.2

We reviewed 10 years experiences of the clinical aspects and early postoperative results in 544 pediatric patients(age less than 16 years old). Among them. 529 cases had the congenital heart diseases, and 15 had the acquired diseases. Open heart surgery was performed in 413 patients. 115 cases were treated with non-open heart surgery. 16 with interventional catheterization. Annual increase of the cardiac patients was not significant in recent 10 years, except slight increase in 1994. The mean age of the study patients had been evidently changed to younger year by year. Total mortality rate of the open heart surgery was 6.4%. The cyanotic congenital heart diseases were high in early postoperative mortality by 25.7%, whereas 4% in acyanotic group. The age group less than one month was most highest in surgical mortality(66.7%). There were no deaths in patients with patent ductus arteriosus(103 cases), atrial septal defect(83 cases) or pulmonary stenosis(17 cases). Among 220 patients with ventricular septal defects(VSD). 10(4.5%) were died early postoperatively. In cyanotic group, the patients with pulmonary atresia with ventricular septal defects(PAVSD), transposition of the great arteries(TGA), interrupted aortic arch(IAA), complex cardiac anomalies with isomerism seemed to be most susceptible to an early death.

老齡者의 建康을 위한 生活習慣 實態調査

申東敏,長鳳愚,李揆文,金賢俊,金昌範,崔宗洙,崔鍾晥,李鍾珏,金圭碩,趙庚旭,金鍾聲,朴鍾振 平生體育硏究所 論文集 1987 平生體育硏究所 論文集 Vol.2 No.-

With a view to examining the habit and method in which old people maintain and improve their health, we consulted 551 men and 444 women who were over 65 years old, and concluded as follows: 1. Habit of eating It's been revealed that most of the old people keep a regular eating hour, control the quantity of meal or eat a little food, and prefer vegetables to meat. 2. Mental health Old people feel the necessity for mental health and most of them (about 80%) keep good mental health without becoming pessimistic. Their chief concenrs have turned out to be about their sons and daughters and their own health and finance. 3. Managing Good Health It has been revelaed that old people do not possess any special kind of secret to keep good health but taking plenty of rest, regular meal, and proper exercise, and many of them (about 60%) have been shown to eat invigorant food that they can easily get around their living area. 4. Physical Functions It has been revealed that many old people are conscious of some symptoms about their parts of body and about to percent of them suffers from neuralgia. Some measures like medical aid especially for old people need to be taken as soon as possible. As we have found that the health-keeping method of old people consists plenty of rest, proper exercise, and appropriate nutrition, we can conclude that the recreatonal and culture facilities and programs for keeping old people in good health should be developed. It is also necessary to study food that contribute to their health and develop ways to get rid of the stresses to which they are exposed in their daily life. Presides, it is natural that government found an administrative department to deal with these matters effectively.

Win32에서 코바 네이밍 서비스 평가

최환수,이종기 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

The Naming Service is central to most common object request broker architecture(CORBA) applications. It serves as a directory for CORBA objects-the building blocks of CORBA applications. As the Windows computing environment is disseminated, the performance features of the existing CORBA is becoming of great interest. Thus, in this paper, we intend to examine some performance features of three commerically-available Naming Service implementations of CORBA in strictly Windows (NT and 98) environment.

니켈기 초내열합금의 고온부식거동에 관한 연구

최승주,이재현,이찬규,김근수,이종훈 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-

Hot corrosion behavior of the CMSX-2, CMSX-4, Rene 77, Rene 80 Ni-base superalloys was investigated at 900℃ by two different corrosion methods, immersing the samples in Na2SO4-NaCl mixture(immersion test)and coating the salt mixture on the surface of the samples(modified coating test). The effects of corrosion times and salt compositions from 0 to 100 percent in Na2SO4-NaCl mixtures were examined. Experimental results showed that the corrosion depths in the alloys increased with increasing time, and the depths of the modified coating test were shotter than those of the immersion test in the mixed salt. It was found that the depths of CMSX series alloys increasing NaCl contents in the mixtures up to 50% NaCl. Corrosion products of the alloys were composed of Cr, Al, Ti oxides. The oxide scale, such as Cr₂O₃, Al₂O₃, TiO₂, were shown to improve hot corrosion resistance in the fused Na₂SO₄-NaCl mixtures.

분자 배향성 제어를 이용한 유기전기발광소자 개발에 관한 연구

崔淙宣,李榕洙 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

The organic electroluminescent devices based on small molecules or conjugated polymers have been greater interest due to their possible applications for flat panel displays. They are attractive because of the capability of multicolor emission, low operating voltage, low power consumption, and competitive cost. The high mobilities allow larger current densities to be reached under operation in the space charge limited conduction region, hence facilitate access to higher luminance as required for passive matrix devices. In this study, we have investigated the molecular orientation control effect of organic electroluminscent devices. We aligned the p-sexiphenyl, which is a blue emitting material, using simple rubbing treatment. We obtained the anisotropic optical propery by UV/visible absorption measurement. In the current density-voltage relationship, we observed that the current density of the rubbing treated devices is larger than that of the non-rubbed device. This indicates that there is a more efficient carrier injection from the anode in the rubbed p-sexiphenyl devices.

척수 동정맥 기형 : 증례보고 Case Report

최원철,강재규,도종웅,정현태,문성수 최신의학사 1991 最新醫學 Vol.34 No.12

압자의 압입에 의한 치관 전장용 복합레진의 기계적 성질 평가

최원호,배태성,박광선,박종수 대한치과기재학회 2001 대한치과재료학회지 Vol.28 No.2

This study was performed to evaluate the mechanical properties of four commercially available veneering resin composites for crown (Dentacolor: DC, Artglass: AG, Esternia: ET and Targis: TG). According to the manufacturer's instructions, disc specimens were fabricated in a teflon mold giving 12mm in diameter and 1 mm in thickness. All specimens were immersed in distilled water at 37℃ for 30 days. An indentation test of 68-degree trigonal diamond pyramid was made under 98.06 mN load for 15 seconds. Hardness numbers, charateristic indentation depths, flow and permanent deformation were measured and compared statistically by ANOVA and Tukey's multiple range test. The results obtained were summarized as follows; 1.The highest hardness value of 87.4 was observed in the ET group and the lowest value of 11.8 was observed in the DC group. Hadness values showed no sinificant difference between the AG group and TG group, but others showed the significant difference beween groups (p<0.5). 2.Flow value of the ET group was significantly lower than those of the AG and TG groups of hybrid composite for crowns. 3.Percent strain during the indentation was the lowest in the DC group and the highest in the AG group, but there was no significant difference in each experimental group (p>0.05). 4.The relationship between the hardness number and flow during the indentation was a negative linear on a logarithmic scale.

감의 脫澁處理中 Pectin 含量과 Texture의 變化

崔鍾旭,孫泰華,鄭信敎,李吉雨,姜峻洙 慶北大學校 1989 論文集 Vol.47 No.-

This experiment was made to investigate the changes of the contents of acetaldehyde, alcohol, tannin, and to study the texture changes of persimmon in relation to the contents of pection during the removal of astringency by CO_2. 1. During the removal of astringency of persimmon fruits, the contents of soluble tannin showed the rapid decrease in high concentration of CO_2, but the contents of ethanol and acetaldehyde showed the rapid increase in all treatments. 2. The contents of W.S.P. increased, but H.S.P. decreased in all treatments. 3. All texture paramenters of persimmon fruits except springness and adhesiveness were decreased druing the removal of astringency. 4. The contents of W.S.P. were good correlated with the changes of hardness in all treatments.

재정정책과 국채의 중립성

최종수 한국경상학회, 한국국민경제학회 2003 경제연구 Vol.21 No.4

국공채 및 재정적자가 거시경제변수에 미치는 효과에 대해서는 대체로 다음의 두가지 상반된 견해가 기준으로 제시되고 있다. 먼저 통념적(conventional) 견해는 조세의 국채로의 대체가 가처분소득을 증가시키고 그 결과 총소비와 소득을 증가시키며 이는 실질이자율을 증가시켜 민간투자를 구축한다. 반면 리카르도 동등성(Ricardian equivalence)이라는 국채의 중립성 가설(Debt Neutrality Hypothesis: DNH)에 따르면, 조세징수의 발생시점의 변화는 경제의 실질균형에 영향을 주지 않기 때문에 현재 적자를 부담함으로써 경제를 부양하려는 안정화정책은 효과가 없게 된다. 이 논문의 목적은 재정금융정책에 있어서 많은 논의의 초점이 되고 있는 국채의 중립성 논쟁과 관련된 몇가지 논점을 이론 및 실증적 측면에서 검토해 보는데 있다. 특히 DNH의 이론적 도출 및 재정금융정책적 시사점, 주요 고전적 기본 가정의 현실적 타당성 등을 간략하게 고찰하였다. 현실세계에서 DNH의 성립에 필요한 모든 가정을 만족시키기는 어렵지만, 중립성 가설 그 자체는 비중립성의 크기와 이유를 논의하는 좋은 기준을 제시해 주었다는 점에서 그 의의는 크다고 할 것이다. 이러한 점에서 DNH의 함축성은 현실세계와 매우 관련이 있다. 아울러 적자재정정책의 효과는 이론적 근거만으로는 해결할 수가 없기 때문에 기존의 실증연구 동향들을 간략하게 검토해 본 뒤 한국경제를 대상으로 국공채의 변화가 주요 거시경제변수에 미치는 효과를 F-검정에 의해서 분석하였다. 검증결과 한국경제의 경우에도 국공채가 순자산으로 간주되고 있지 않아 DNH가 어느 정도 타당성있게 받아 들여지고 있는 것으로 해석할 수 있었다. 향후 DNH의 통계적 안정성(robustness)을 제고하기 위해서는 재정적자와 거시경제변수간의 통상적 연계관계가 성립하는지를 보다 일반적이고 세련된 모형으로 검증해 보아야 할 것이다. This paper attempts to analyze the well-known 'Debt Neutrality Hypothesis(DNH)' called Ricardian equivalence. revived by Barro(1974), from theoretical and empirical perspectives. The purpose of this paper is as follows. First, to discuss the theoretical framework underlying the strict DNH and investigate effects of relaxing the basic classical assumptions, and formally derive policy implications of the DNH from the results. Second, to briefly review the [revious empirical results of the DNH. We can see from the debate on the DNH that trying to explain whether Debt neutrality is true can yield a deeper understanding about the effects of government debt on the economy. Finally, to empirically test the relevance of the DNH in Korea by analyzing the significance of financial variables instead of the usual consumption function because the issue may be ultimately assessed on empirical grounds. Toward this end, standard F-tests were run by regressing three critical Korea time series data on their won lagged values, lagged value of changes in reserve money(money stock), and lagged values of changes in government bond. In the empirical study of the Korean annual data from 1972 to 2000. on balance, the estimation indicated that there is some support for Debt neutrality in Korea. In this context, although we had used a relatively simple approach to analyze the DNH. we can easily find that our provisional empirical findings do not appear consistent with the conventional view of the deficit financing that government bonds are net wealth.

TMS320C30 을 이용한 직접 구동형 로봇 매니퓰레이터 제어기 설계

崔京三,李鐘洙 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.2

A controller for the dynamic control of robot manopulators was designed using a TMS320C30 DSP CPU, which has the highest performance among the third DSP chips in the TI company. The design objective of the system is the real-time implementation of various dynamic control algorithms including neural and fuzzy control, which requires a lot of computation and large memory and has been tested only by simulations so far. The designed controller consists of a TMS320C30 CPU, high speed D/A Converters, 32-bit Counters, 2K Dual port RAM, and 4MB DRAM for the advanced robot control algorithms. We implemented a torque control algorithm on the HongIK-DDA with the developed controller. The Simulation data show that the developed controller functions perfectly and has sufficient computational performance for the dynamic control of robots, which means that various dynamic control algorothms of robot can be implemented realtime with this controller.