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요추부 척추전방전위증 환자에서 후방경유 추체간 골유합술 후 시상면 균형과 하부요통 간의 관계 분석
김 희열,주 창일,이 승명 조선대학교 의학연구원 2017 The Medical Journal of Chosun University Vol.42 No.2
Measures of radiographic pelvic and spinal parameters of sagittal balance analysis have become of considerable importance for reconstructive surgery of the spine, particularly in cases of degenerative spondylolisthesis. The authors conducted a retrospective study of clinical outcomes and a radiological review on 231 patients with one or two level degenerative spondylolisthesis. First, patients were classified using preoperative pelvic parameters and evaluations were conducted using mean values of pre- and postoperative spinopelvic parameters. Second, patients were divided into two study groups, that is, Group A (n=105; exhibited no improvement (increase or no change) in pelvic tilt postoperatively) and Group B (n=126; exhibited pelvic tilt improvement (decrease) postoperatively). Clinical outcomes in the two groups were compared using Visual Analogue Pain Scores (VAS) and Oswestry disability index (ODI). All preoperative pelvic parameters show restoration tendency after PLIF surgery for spondylolisthesis, and greater deviations of preoperative pelvic parameters from normality showed greater recovery postoperatively. VAS and ODI improvements at follow-up were poorer in group A than in group B.
Quasi-F 공간과 극소 Quasi-F cover의 역사적 배경
김창일,Kim, Chang-Il 한국수학사학회 2005 Journal for history of mathematics Vol.18 No.4
티코노프공간 X에 대하여 C(X)와 $C^*(X)$는 Riesz-공간이다 C(X)가 순서-코시완비일 필요충분한조건은 X가 quasi-F 공간이고, X가 컴팩트공간이며 QF(X)가 X의 극소 quasi-F cover일 때, C(X)의 순서-코시완비화와 C(QF(X))는 동형이다. 본 논문에서는 quasi-F 공간의 정의와 극소 quasi-F cover의 구성에 관한 동기 및 역사적 배경을 살펴본다. For a Tychonoff space X, C(X) is a Riesz-space. It is well known that C(X) is order-Cauchy complete if and only if X is a quasi~F space and that if X is a compact space and QF(X) is a minimal quasi-F cover of X, then the order- Cauchy completion of C(X) is isomorphic to C(QF(X)). In this paper, we investigate motivations and historical backgrounds of the definition for quasi-spaces and the construction for minimal quasi-F covers.
Al(Cu 1%) 플라트마 식각후 fluorine 처리에 의한 passivation 막 형성
김창일,최광호,김상기,백규하,윤용선,남기수,장의구 대한전자공학회 1998 電子工學會論文誌, D Vol.d35 No.1
In this study, chlorine(Cl)-based gas chemistry is generally used to etching for AlCu films metallization.The corrosion phenomena of AlCu films were examined with XPS (X-ray photoelectron spectroscopy), SEM 9Scanning electron microscopy), and TEM (Transmission electron microscopy). SF$_{6}$ plasma treatment sulbsequent to the etching process preventas the corrosion effectively in the pressure of 300 mTorr. It is found that the cholrine atoms on the etched surface are not substituted for fluorine atoms during SF$_{6}$ treatment, but a passivation layer on the surface by fluorine-related compounds would be formed. The passivation layer prevents the moisture penetration on the SF$_{6}$ treated surface and suppresses the corrsion sucessfully.fully.
조선(朝鮮) 산학자(算學者) 홍정하(洪正夏)의 계보(系譜)
김창일,홍성사,홍영희,Kim, Chang-Il,Hong, Sung-Sa,Hong, Young-Hee 한국수학사학회 2010 Journal for history of mathematics Vol.23 No.3
조선의 가장 위대한 산학자 홍정하(洪正夏)의 수학적 계보와 가계를 조사하여 중인 산원들의 관계를 조사한다. 중인으로 산서를 저술한 산학자 경선징(慶善徵), 이상혁(李尙爀)과 홍정하(洪正夏)는 결혼에 의하여 연결되어 그들의 수학적 업적이 연결될 수 있었음을 보이고, 또 홍정하(洪正夏)의 가계와 인척으로 연결된 중인 산원들의 가계를 밝혀내어 홍정하(洪正夏)의 업적이 중인 산원들에 큰 영향을 끼친 것을 보인다. Hong Jung Ha(洪正夏, 1684~?) is the greatest mathematician in Chosun dynasty and wrote a mathematics book Gu Il Jib(九一集) which excels in the area of theory of equations including Gou Gu Shu. The purpose of this paper is to find his influence on the history of Chosun mathematics. He belongs to ChungIn(中人) class and works only in HoJo(戶曹) and hence his contact to other mathematicians is limited. Investigating his colleagues and kinship relations including the affinity and consanguinity, we conclude that he gave a great influence to those people and find that three great ChungIn mathematicans Gyung Sun Jing(慶善徵, 1684~?), Hong Jung Ha and Lee Sang Hyuk(李尙爀, 1810~?) are all related through marriage.
손창일 한국경영법률학회 2011 經營法律 Vol.22 No.1
A significant principle of the modern U.S. corporate law is that shareholders in a corporation are not liable for the obligations of the corporation beyond the capital invested by them. This means that the corporation is a legal entity that is separate from its shareholders. Therefore, the legal form of the corporation allows shareholders to refrain from worrying about their personal liability beyond their invested money. This is called limited liability of shareholders, and this principle has been accepted in most U.S. states since the mid-19th century. However, there are several situations when this principle is not applicable. When the application of the limited liability rule results in inequitable results, the courts apply the equitable doctrine of “piercing the corporate veil” to disregard the separateness of the corporations and shareholders. The “piercing the corporate veil” doctrine allows a plaintiff to impose corporate legal liability on shareholders. In the U.S., several scholars regard the principle of “piercing the corporate veil” as complex and vague. In order to clarify the logic behind this principle, I hold my opinion that the “legal entity factor” and “limited liability factor” can be lifted simultaneously in corporate piercing cases. First, within the logic of this doctrine, we can explain the cases that show “piercing the legal entity” and “piercing the limited liability” simultaneously. Second, we can easily explain the reason why the limited liability of directors and officers can be pierced. Third, we can understand why the “reverse piercing” is not essentially different from the “piercing the corporate veil” doctrine.