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김수관,김운규,김봉균,장현선 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6
The purpose of this study was to investigate the mean cranial bone thickness at various points of the bone and to serve as a clinical guide for choosing a bone graft. Twelve bones were obtained from 6 Korean adult skulls for this study. The mean bone thickness at each point of the 17 points of the bone and at the corresponding points of the opposite bone was obtained in all skulls studied. The thinnest part of the parietal bone was 5.92mm. The thickest part of the parietal bone was 7.58mm. The mean bone thickness at each point of measurements on two opposite bones was compared using the paired Student's t-test. The mean thickness did not differ significantly. The thickness in the same bone varied widely depending on the points of measurement.
김진봉,김선규,이낙운 강원대학교 조형예술연구소 2005 조형예술논문집 Vol.6 No.-
Pre-design phase becomes very important because the construction market in Korea is often unpredictable. Also, the construction market is diversely changing because social environmental factors are rapidly transforming. Therefore, construction projects are becoming complex and diverse. Furthermore, the risk being ingerent in construction projects are increasing, and now people are considering about the risk management of construction projects in successfully handling the risk factor. So, most risky period construction project is a feasibility analysis phase where the possibility is highest. But the existing feasibility analyse cannot fulfill their functions very well in construction projects because they .are based on the intuitive approach rather than the systematic approach. Therefore, the objective of this research is to propose an another feasibility analysis method reflecting a risk prediction model through an analysis of the existing studies and a case study.
강원지역 대·중소 건설업의 균형적 발전 방안에 관한 연구
김진봉,김선규 강원대학교 조형예술연구소 2007 조형예술연구 논문집 Vol. No.8
Recently, a size of the domestic construction industry has been reduced rapidly, and its economic slump has been continued with the government real estate stabilization and tax policies. Moreover, as the reconstruction of apartments that has been added high value to the construction companies has been on the stake of high risk with delays of reconstruction start and finance restriction policies, an uncertainty of the construction markets and the competitions between the construction companies has been increased. At this point, the establishment of a collaboration relationship between construction companies has been recognized as one of the methodologies to respond actively on these uncertainties and fierce competitions. A collaboration relationship between construction companies is based on the balanced cooperation relationship for surviving together, and should be maintained on the complement and specialized collaboration between big, middle and small contractors. This paper propose a model of practical collaboration relationship to cooperate together between prime and subcontractors in Korean construction companies based on the analysis of questionnaires to the collaboration status between general and subcontractors in the Kangwon province.
급랭응고한 Mg-Zn-Ca-Si계 합금의 열안정성에 관한 연구
김태봉,김선화 순천향대학교 부설 산업기술연구소 2000 순천향 산업기술연구소논문집 Vol.6 No.1
Melt spinning process was used to prepare the rapidly solidified ribbons of Mg-6Zn-5Ca(wt%) alloys with 1, 2 wt% Si. In present work, SEM, EDS, XRD, and microhardness test were performed to investigate the characteristics of the ribbons. The microhardness of the ribbons according to Si content decreased slowly since the content of MgCaSi precipitates in air side of ribbons increased. The Mg-6Zn-5Ca-1Si melt-spin ribbon heat-treated at 150 ℃ and 1hr showed the maximum microhardness and then its microhardness decreased slowly above 150 ℃.For the ribbon of alloy with 2 wt% Si, its hardness increased up to 200℃ and then decreased rapidly. As the content of Si and the heat-treatment temperature increased, the content of MgCaSi formed initially in air side increased. The present result showed that the addition of Si to Mg-6Zn-5Ca alloys decreased the microhardness of the ribbons and did not improve them mechanically even after aging.