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비파괴 시험에 의한 국산 침엽수 $2{\times}6"$ 구조부재의 등급구분
심국보,박정환,김광모,Shim, Kug-Bo,Park, Jung-Hwan,Kim, Kwang-Mo 한국산림바이오에너지학회 2006 산림바이오에너지 Vol.25 No.2
국산 침엽수재의 구조재 활용에 필요한 등급구분을 위해 소나무, 잣나무와 낙엽송 $2{\times}6"$ 부재에 대해 초음파를 이용한 비파괴 방법을 적용하였다. 정적 탄성계수와 초음파 시험에 의한 동적 탄성계수의 상관관계를 나타내는 k-factor는 소나무의 경우 1.0602, 잣나무 1.0013, 낙엽송 1.2320로 나타났다. k-factor를 적용할 경우 비파괴방법에 의한 동적 탄성계수 측정에 의해 침엽수 구조부재 등급구분이 가능할 것으로 판단되었다. 기계응력 등급구분에서 소나무는 E9 이상의 등급이 전체의 76%인 반면 잣나무는 E7 이상의 등급이 전체의 85%, 낙엽송은 E11 이상의 등급이 68% 분포하였다. 정적 탄성계수와 휨파괴계수(MOR)의 상관관계도 비교적 높게 나타나 이를 동적 탄성계수로부터 추정한 k-factor와 연계할 경우 초음파 비파괴 등급구분 방법에 의해 국산 침엽수재의 휨강도 성능평가가 가능할 것으로 판단되었다. This study was carried out to provide basic data for using domestic structural softwood lumber efficiently and ensuring structural safety of timber structures. The ratios (k-factor) between static and dynamic MOE measured by ultrasonic device for $2{\times}6$ domestic softwood structural lumber are 1.0602 for Korean red pine, 1.0013 for Korean white pine and 1.2320 for Japanese larch. In machine grade using nondestructive method, 76% of Korean red pine was classified into higher than E9 grade, 85% of Korean white pine was sorted into higher than E7 grade and 68% of Japanese larch was classified into higher than E11 grade. Correlation between MOE and MOR by static bending with k-factor from nondestructive method provide a possibility to predict bending strength and allowable stress of domestic softwood structural lumber.
초고압 동결 및 해동방법이 돈육의 물리적 특성에 미치는 효과
심국보,홍근표,최미정,민상기,Shim, Kook-Bo,Hong, Geun-Pyo,Choi, Mi-Jung,Min, Sang-Gi 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.6
This study was conducted to investigate the effect of various high pressure freezing and thawing treatments on the physical properties of pork. To compare the effects of the freezing and thawing process on meat quality, atmospheric freezing followed by running water thawing (AFRT), pressure shift freezing followed by running water thawing (SFRT), and pressure shift freezing and pressure assisted thawing (SFAT) were conducted at pressure of 250 MPa and cooling temperature of $-22^{\circ}C$. SAFT and SFRT showed a shorter phase transition time and total thawing time than AFRT. The pH value of treated samples increased significantly (p<0.05) compared to unfrozen meat. In addition, SFAT and SFRT showed a higher pHvalue than AFRT. Although the water holding capacity was significantly decreased (p<0.05) for SFAT and SFRT, SFRT reduced drip loss. In regards to color, SFAT and SFRT resulted in a significant increase in color parameters (p<0.05) relative to AFRT, while SFAT produced a higher L*-value. High pressure treatment significantly increased shear force (p<0.05) compared to AFRT, and, where SFRT showed the highest shear force. Therefore, these combined results indicated that the hydrostatic pressure treatment improved the functional properties of pork and increased the freezing and thawing rate.
심국보 한국경영교육학회 2008 경영교육연구 Vol.50 No.-
The purposes of this study are as follows; First, To extract the major factors that have some influences on the performance of the electronic trade payment system in business and analyze if they have any influences practically. Second, To find out some problems in adoption by analyzing the current status of internal listed business that have introduces electronic trade payment system and use of it. Third, To suggest a recommendation that enhance the efficiency and performance of electronic trade payment system through the improvement of it in the basis of this research. In summary, the results of this study are as follows; First, the result of the analysis on the top management's concern and support on electronic trade payment system seemed to be higher than common and have intensive correlation with the performance of the electronic trade payment system measured by and usage level degree. Second, this study observed the electronic trade payment system have intensive correlation with education and training of electronic trade payment system. The important level of this variable to improve the user's utilization level. Third, the characteristics of information have intensive correlation with performance of electronic trade payment system. The important level of this variable to improve the user's utilization level proved to be same with the rank of the important level to improve the user's satisfaction. 본 연구의 목적은 우리나라 무역업체의 전자무역결제시스템을 활용하고 있는 이용자들의 전자무역결제시스템에 대한 만족도와 전자무역결제시스템의 이용도를 분석하는데 있으며, 본 연구의 가설검증 결과는 다음과 같이 요약되어진다. 첫째, 전자무역결제시스템에 대한 최고 경영자의 적극적인 지원과 관심 정도는 정보시스템의 이용도에는 유의한 영향을 미치고 있지만 시스템 이용자의 만족도에는 영향을 미치지 않는 것으로 나타났다. 둘째, 전자결제업무와 전반적인 정보시스템에 대한 교육 및 훈련정도는 가설검증 결과에서 나타난 바와 같이 이용자의 만족도에 영향을 미치지 않는 것으로 나타났다. 셋째, 전자무역결제시스템을 통한 산출정보의 특성은 시스템 이용자의 만족도와 시스템 이용도에 영향을 미치는 것으로 나타났다.