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한국 프로젝트 파이낸스의 건설회사 지급보증에 대한 실증분석
손영진(Sohn Young-Jin),이상효(Lee Sang-Hyo),김재준(Kim Jae-Jun) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.6
In Korea, develop companies in SPV(Special Purpose Vehicle), which are actual investors, have very poor financial structure, while construction companies have relatively sound financial structure. This is why banks require a construction company to make guarantee in project financing. In this way, Korean banks may be able to remove project risk substantially, but, construction companies, as subcontractors, have to bear burden of a project failure. The objective of this research is to conduct an empirical analysis on the value of construction company’s guarantee in project finance, using real option theory, in order to identify problems of guarantee contract and offer suggestions. To this end, the research analyzed value of guarantee for bank loans in housing complex projects, using Binomial Lattice Model among real option methods. The evaluation of guarantee contract based on real option method showed that the value was approximately KRW 800 million. By using payment guarantee as a buffer, the bank can restore the entire project loan in amount of KRW 120,693,000,000 regardless of the project result. And yet, the bank does not bear any obligation for the KRW 800 million, the sum of guarantee. This project finance structure is at odds with the market logic. It is quite unfair and disadvantageous for construction companies, and thus needs to be addressed.
오픈하우징 공법을 위한 시스템 폼의 골조공사 경제성 비교 분석
손영진(Sohn, Young-Jin),노삼영(Noh, Sam-Young) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.1
The study conducted the case study to identify the cost differences between the steel-wire truss deck system and the table system form-work system. To compare the construction cost of two different form-work methods, the study estimated the total price for the form-work module of 14.4m×4.8m with material quantities. This study identified that the slab cost of truss deck form-work system was 15% lower than the table system form-work even though the combination form-work cost of beam and slab for the truss desk was 19% higher than the combination form-work costs of system form-work. In addition, the study identified that the truss-deck form-work system also required the additional steel reinforcement of 77% compared to the table system form-work. Finally, the study concluded that the table system form-work could reduce the total construction costs of 15% through lowering the form-work cost of beam and slab, and steel reinforcement.
시스템 폼과 트러스 데크의 골조 공사 경제성 비교 분석
손영진(Sohn, Young-Jin),이주성(Lee, Ju-Sung),노삼영(Noh, Sam-Young) 대한건축학회 2016 大韓建築學會論文集 : 構造系 Vol.32 No.11
The reduction of construction duration and cost is two of main success factors in the modern construction industry. Since reinforced concrete is the most economical material for construction, the large-scale form-work of concrete is also related to the competitiveness of construction method. Thus, the application of appropriate form-work system is one of key factors to reduce the construction cost, improve the quality of the finished concrete, shorten the construction period, and reduce the form-work collapse during the construction. The study conducted the case study to identify the cost differences between the steel-wire truss deck system and the table system form-work system. To compare the construction cost of two different form-work methods, the study estimated the total price for the form-work module of 14.4m×4.8m with material quantities. This study identified that the slab cost of truss deck form-work system was 15% lower than the table system form-work even though the combination form-work cost of beam and slab for the truss desk was 19% higher than the combination form-work costs of system form-work. In addition, the study identified that the truss-deck form-work system also required the additional steel reinforcement of 77% compared to the table system form-work. Finally, the study concluded that the table system form-work could reduce the total construction costs of 15% through lowering the form-work cost of beam and slab, and steel reinforcement.
소아의 전완부 양골 골절에서 유연성 골수강 내 금속핀 고정술
손영진 ( Young Jin Sohn ),신용운 ( Yong Woon Shin ),정형진 ( Hyung Jin Chung ),이상림 ( Sang Lim Lee ),염재광 ( Jae Kwang Yum ),성열보 ( Yerl Bo Sung ),안종국 ( Jong Kuk An ),최을오 ( Eul O Choi ) 대한골절학회 2006 대한골절학회지 Vol.19 No.2
목적: 소아 전완부 양골 골절에 대한 유연성 금속핀을 이용한 골수강 내 고정술의 효용성에 대해서 알아보고자 본 연구를 수행하였다. 대상 및 방법: 2000년 1월부터 2004년 12월까지 전완부 양골 골절로 진단 받고 수술적 치료가 필요했던 환자 중 유연성 금속핀을 이용한 골수강 내 고정술을 시행한 15명의 환자를 대상으로 하였다. 남자가 11예, 여자가 4예였으며 평균 연령은 11.6세 (범위, 7~15세)였다. 모든 예에서 도수 정복 후 요골은 역행적으로, 척골은 전향적으로 골수강 내 고정술을 시행하였다. 내고정 기간은 요골은 평균 5.3개월 (범위, 3~8개월), 척골은 평균 4.7개월 (범위, 2~8개월)이었다. 모든 예에서 술 후 장상지 석고 고정을 시행하였으며, 평균 고정 기간은 5.2주 (범위, 4~6주)였다. 결과: 방사선적으로 전례에서 평균 8.4주 (범위, 5~15주)에 골유합이 이루어졌으며, 골절부의 회전 변형, 각변형과 단축은 없었으나 2예에서 내고정물 제거 후 재골절이 발생하여 도수 정복 후 장상지 석고 고정을 8주간 시행하였다. 다른 1예에서 불완전 척골신경 손상이 의심되었으나 특별한 처치 없이 치유되었으며 구획 증후군, 핀 삽입부 감염 등은 없었다. 피부 반흔은 전예에서 무시될 정도였다. 내고정물 제거 후 주관절과 수근관절의 운동 범위는 전예에서 정상이었으며, 육안적인 회전 변형 및 각변형은 없었다. 결론: 수술적 치료가 필요한 소아의 전완부 양골 골절 치료에 있어 유연성 골수강 내 고정술은 유용한 술식으로 생각된다. Purpose: To evaluate the efficacy of Flexible intramedullary pin fixation in pediatric forearm diaphyseal fractures. Materials and Methods: In this retrospective study, we reviewed 15 cases of forearm diaphyseal fractures operated using flexible intra-medullary nail fixation technique between January 2000 and December 2004. Of these 15 children, there were 11 boys and 4 girls with an average age of 11.6 years (range, 7~15 years). The implants were introduced in the distal radius and proximal ulna in all patients. An average duration of fixation was 5.3 months in the radius, 4.7 months in the ulna. After operation, all patient were applied with a long arm cast and the duration of immobilization was 5.2 weeks (range, 4~6 weeks) on average. Results: All fractures in this series healed with normal range of supination (average 80.0) and pronation (average, 71.6°). Average operation time including anesthesia was 123 minutes and hospital stay was 5.4 days. Time to union was 8.4 weeks on average. Range of motion and functional results were satisfactory in all cases. There were one case of incomplete ulnar nerve injury and two cases of refracture which were treated conservatively without any permanent complication. Conclusion: Flexible intramedullary pin fixation technique is a good method in case of unstable displaced fracture and difficult or failed closed treatment.