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난류채널유동의 라그란지안 해석 (I)- 입자추적 알고리듬 평가 -
최정일,이창훈,Choi, Jung-Il,Lee, Chang-Hoon 대한기계학회 2003 대한기계학회논문집 Vol.27 No.7
The Lagrangian dispserion of fluid particles in inhomogeneous turbulence is investigated by a direct numerical simulation of turbulent channel flow. Fluid particle velocity and acceleration along a particle trajectory are computed by employing several interpolation schemes such as linear interpolation, high-order Lagrange polynomial interpolation and the Hermite interpolation schemes. The performances of the schemes are evaluated through comparison of errors in computed particle positions, velocities and accelerations against spectral interpolation. Adopting the four-point Hermite interpolation in the homogeneous directions and Chebyshev polynomials in the wall-normal direction appears to produce most reliable Lagrangian statistics including acceleration correlations with a reasonable amount of computational overhead.
최정일 ( Jung Il Choi ) 영남대학교 법학연구소 2013 영남법학 Vol.0 No.36
Legislators have heavily regulated the basic crimes of Consequentially Aggravated Crimes which often lead to heavy effects (mostly injury or death). Thus, In relation to the illegality, That is heavier than the Simple Combination Form. The aggravated punishment of Consequentially Aggravated Crime can be justified by examining the argumentation of illegality closely. Being analyzed structurally, The Consequentially Aggravated Crime consists of the simple combination of different crimes; A deliberate offense and A criminal negligence. In this case, The fundamental solution is to be punished by Article 40. As the exception of Article 40, The punishment of Consequentially Aggravated Crime is much heavier than that of the Simple Combination Form (a deliberate offense and a criminal negligence) dealt with by Article 40. Even though the Consequentially Aggravated Crime is structurally identical to the Simple Combination Form which is applied to Article 40, In terms of extent of punishment, why is both of them different? This is because the gradation in the illegality is very different. That is to say, The Principle of Responsibility is a major premise in the criminal law system; “The extent of responsibility depends on the extent of illegality, The extent of punishment depends on the extent of responsibility”. Being compared with it`s illegality, The extent of their punishments is too heavy in criminal law. That is to say, In current criminal law, Not only the basis of aggravated punishment but also the extent of aggravated punishment should we consider. In examining our regulations of Consequentially Aggravated Crime, In terms of the sentence, we can notice that the regulations of Consequentially Aggravated Crime are much heavier than those of the Simple Combination Form (a deliberate offense and a criminal negligence) or even the deliberate offense of heavy effects (death or injury). Appropriate reduction of sentences are certainly needed. With the proper revisions, The regulations of Consequentially Aggravated Crime can correspond to the principle of responsibility. To revise the regulations of Consequentially Aggravated Crime properly, first of all, according to it`s illegality, we have to reduce the sentence of Consequentially Aggravated Crime. Also systematize An attempted crime of Consequentially Aggravated Crime. and by the extent of violence, we should consider establishment of the provisions in Consequentially Aggravated Crime.
최정일(Jung-Il Choi),이창훈(Changhoon Lee) 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.7
The Lagrangian dispserion of fluid particles in inhomogeneous turbulence is investigated by a direct numerical simulation of turbulent channel flow. Fluid particle velocity and acceleration along a particle trajectory are computed by employing several interpolation schemes such as linear interpolation, high-order Lagrange polynomial interpolation and the Hermite interpolation schemes. The performances of the schemes are evaluated through comparison of errors in computed particle positions, velocities and accelerations against spectral interpolation. Adopting the four-point Hermite interpolation in the homogeneous directions and Chebyshev polynomials in the wall-normal direction appears to produce most reliable Lagrangian statistics including acceleration correlations with a reasonable amount of computational overhead.<br/>
위험의 분해 방법에 의한 주식투자위험의 시계열적 변동성에 관한 연구
최정일 ( Jung Il Choi ),이장우 ( Jang Woo Lee ) 한국금융공학회 2005 금융공학연구 Vol.4 No.1
Traditional view asserts that the arrival of new information moves stock prices, and that the volatility of stock return can be interpreted a the barometer of the risk of stock investment under the assumption of normality of return distribution. With these basics in mind we study on the serial volatility of the risk of stock investment by dividing individual stock volatility into ``market, industry, and firm-specific`` volatility during January 1985 to September 2004 in the Korean stock market. The common sense that stock return volatilities before and after the IMF crisis of 1997 are different also stimulates our research. The method by Campbell, Lettau, Malkiel and Xu(2001, pp. 6-9) is used for decomposition of volatility. The result shows that the volatility of domestic stock market is 1.8 times higher than that of U.S. market. Further, it is revealed that firm-specific volatility has shown distinguished acclivity from with market or industry volatility during past twenty years. This finding is far from being irrelevant to declivity of the correlation between individual stocks. It is also documented that firm-specific volatility has bigger and stronger serial trend compared with market or industry volatility.
사이버명예훼손죄의 구성요건 분석 및 형사법적 규제 방안에 대한 소고(小考)
최정일 ( Jung Il Choi ) 경상대학교 법학연구소 2015 법학연구 Vol.23 No.2
In the thesis, Among Cyber crimes, especially Cyber defamation(Article 70 of Service digital network Law) was dealt with through the thinking of Crminal law. most of all, issue of Cyber defamation was studied and reviewed with comparison to Off-line defamation. Since the Cyber space is not different from the Off - line space, we should apply the theory of criminal law’s defamation to the Cyber defamation. furthermore, we need to establish institutional devices for swift relief of victims additionally. In relation to systematic status concerning Article 70 Service digital network Law, we need to understand Article 70 of Service digital network Law as the aggravation constitutional requirement regarding Article 307 of Criminal law and independence constitutional requirement about Article 309 of Criminal law. besides, ID and Handle name should not be regarded as the subject of fame. So chance of defamation about ID and Handle name should be treated as the defamation problem about ID owner. Purpose of slander(in the Article 309 of Criminal law and Article 70 of Service digital network Law) is not different from intention of defamation in terms of its content. Also opinion of the Supreme court has many problems in that it sees a relation between‘purpose of slander’and‘for public interest’as contrary. A Relation between‘purpose of slander’and‘for public interest’should be thought as coexistent. Although there is somewhat purpose of slander on the other party, in case of defaming the other party for superior public interest through publication and service digital network. the Article 309 of Criminal law should be applied to that. In relation to legislation theory,‘purpose of slander’needs to be deleted from the Article 309 of Criminal law and Article 70 of Service digital network Law. also the Article 309 of Criminal law needs to be revised. Above all, Article 70 of Service digital network Law - Cyber defamation - should be incorporated into the Article 309 of Criminal law.