陳述書에 關한 諸問題

許容碩 대한변호사협회 2003 人權과 正義 : 大韓辯護士協會誌 Vol.318 No.-

Influence of Subsurface Layer on the Indentation Damage Behavior of YSZ Thermal Barrier Coating Layers Deposited by Electron Beam Physical Vapor Deposition

허용석,박상현,한인섭,우상국,정연길,백운규,이기성 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.9

The thermal barrier coating must withstand erosion when subjected to flowing gas and should also maintain good stability and mechanical properties while it must also protect the turbine component from high temperature, hot corrosion, creep, and oxidation during operation. In this study we investigated the influence of subsurface layer, Al2O3 or NiCrCoAlY bond coat layer, on the indentation damage behavior of YSZ thermal barrier coating layers deposited by electron beam physical vapor deposition (EB-PVD). The bond coat is deposited using different process such as air plasma spray (APS) or spray of high velocity oxygen fuel (HVOF) and the thickness is varied. Hertzian indentation technique is used to induce micro damages on the coated layer. The stress-strain behaviors are characterized by results of the indentation tests. The thermal barrier coating must withstand erosion when subjected to flowing gas and should also maintain good stability and mechanical properties while it must also protect the turbine component from high temperature, hot corrosion, creep, and oxidation during operation. In this study we investigated the influence of subsurface layer, Al2O3 or NiCrCoAlY bond coat layer, on the indentation damage behavior of YSZ thermal barrier coating layers deposited by electron beam physical vapor deposition (EB-PVD). The bond coat is deposited using different process such as air plasma spray (APS) or spray of high velocity oxygen fuel (HVOF) and the thickness is varied. Hertzian indentation technique is used to induce micro damages on the coated layer. The stress-strain behaviors are characterized by results of the indentation tests.

IT SMEs’ Product Planning Capability and Manufacturing Capability in the Context of Digital Convergence: The Mediating Impacts of the Product Exterior and Interior Design Capabilities

허용석 한국디지털정책학회 2015 디지털융복합연구 Vol.13 No.12

IT SMEs' product planning, product design, and manufacturing capabilities are of importance to creating their sustainable competitive advantages in the context of digital convergence. However, there have been few empirical studies investigating the relationships among them, which has made this research attempt to model the relationships and empirically test them. Especially, this study divided IT SMEs' product design capability into the product exterior and interior design capabilities and focused on the mediating effects of the product exterior and interior design capabilities between the product planning and manufacturing capabilities. By analyzing the 310 samples of Korean IT SMEs with the ordinary least squares regression analysis, this study has empirically revealed that IT SMEs' product exterior and interior design capability jointly and fully mediate the positive relationship between their product planning and manufacturing capabilities.

새로운 관점에서의 무증거성 전자 입찰 시스템에 대한 안전성 분석

허용석,양형규,안영화 한국자료분석학회 2007 Journal of the Korean Data Analysis Society Vol.9 No.1

Recently, a receipt-free scheme is rising for a secure e-auction. The goal of a receipt-free scheme in an e-auction is to prevent a bid-rigging. If the bid-rigging happens in the e-auction, the winner can get the bidding item with an unreasonably low price. The first receipt-free scheme for the e-auction was proposed by Abe and Suzuki. Chen, Lee and Kim also proposed the extended receipt-free scheme. In this paper, we point out that the existed receipt-free schemes do not prevent perfectly the bid-rigging attack. Moreover, we indicate that a bid-collision is a possible cause of an e-auction. In the strict sense, the bid-collusion is different from the bid-rigging. We compare the bid-rigging attack with the bid-collusion attack, and analyze the security of the existed receipt-free schemes in a viewpoint of the bid-rigging attack and the bid-collusion attack. Especially, we present the bid-rigging attack by a seller in Chen et al.'s scheme. In this paper, we do not present the scheme which can prevent the bid-collision attack. 최근 들어, 전자입찰 시스템에서의 무증거성에 대한 문제가 새로운 이슈로 대두되고 있다. 무증거성 기법의 목적은 강제 입찰을 막기 위한 기법이다. 전자입찰에서 강제입찰이 발생하면, 강제자가 항상 특별한 이유 없이 낮은 가격으로 낙찰자가 되는 문제점을 가지고 있다. 이러한 문제를 해결하기 위해 Abe 등(2002)이 전자입찰을 위한 최초의 무증거성 기법을 제안하였으며, Chen 등(2003)이 전자입찰에서의 향상된 무증거성 기법을 제안하였다. 본 논문에서는, 기존의 무증거성 기법이 강제 입찰을 완벽하게 막을 수 없다는 문제점을 지적하고 담합 입찰에 대한 방지 기법의 필요성에 대하여 분석한다. 특히 강제 입찰과 담합 입찰은 엄격히 말해 다른 문제이므로, 강제 입찰과 담합 입찰을 비교 설명하고, 기존의 전자 입찰의 무증거성 기법을 강제 입찰과 담합 입찰의 관점에서 안전성을 분석한다.

醫療過誤訴訟에 있어서 鑑定上의 問題點

허용석 대한변호사협회 2002 人權과 正義 : 大韓辯護士協會誌 Vol.312 No.-

편측 척추체간 후방융합술 환자의 임상결과와 골융합 성공률에 대한 분석

허용석,장현동,김은영,박관호,지문표,김재오,김정철 대한신경외과학회 2002 Journal of Korean neurosurgical society Vol.31 No.1

Objective:The goal of study is the evaluation of clinicofunctional outcomes and fusion success rates of unilateral posterior lumbar interbody fusion(PLIF) using cages. Methods:The authors conducted retrospective study of 81 patients who underwent unilateral PLIF using cages. The outpatient notes, standard hospital charts, and pre-and postoperative imaging studies were analyzed. In this study pre-and postoperative back pain, radiating pain, fusion success rates, pseudoarthrosis, clinicofunctional outcome, and complications were evaluated. Follow-up duration ranged from 3 to 8 years. Results:Eighty-one patients underwent unilateral PLIF using 98 cages(TFC:37, CH cage:25, Novus cage 36). Two-level fusion was performed in 17 patients. There were 48 men(59%) and 33 women(41%). Seventh decade was most common(47%). The most common site of PLIF was at L4-5 space(69.4%) and left side(58%) was prevalent. Fusion was successful in 91 out of 98 levels(92.8%) and pseudoarthrosis was observed in five patients(7 level, 7%). The clinicofunctional results by Prolo scale were as follows:good(score 8-10):80.3%, moderate(score 6-7):14.8%, poor(score 5 or less 5):4.9%. Device migration was observed in six cases:5(20%) of 25 CH cages and 1(2.8%) of 36 Novus cages. Conclusion:Unilateral PLIF using cage is one of method to decrease the rates of iatrogenic complications in patient of unilateral symptomatic spinal instability while preserving normal anatomic structures with good fusion success rates and clinicofunctional results after surgery. Key words:Cage;Unilateral PLIF;Fusion success rate;Pseudoarthrosis.

The Effect of the Exterior R&D Network on the Import Substitution of Small and Medium Venture Firms: The Moderating Impact of Corporate R&D Center

허용석,Hau, Yong Sauk The Society of Digital Policy and Management 2017 디지털융복합연구 Vol.15 No.11

The business environment changing very fast with technology advance and convergence makes the role of R&D become more and more important to firms' success. By analyzing the 683 firm-level data of small and medium venture firms with the ordinary least squares regression, this study sheds new light on the following four points. First, small and medium venture firms' exterior R&D collaboration network heterogeneity positively impacts their import substitution from technology development. Second, the existence of the corporate R&D center moderates the positive impact of small and venture firms' exterior R&D collaboration network heterogeneity on their import substitution from technology development. Third, small and venture firms' exterior R&D information network heterogeneity positively impacts their import substitution from technology development. Fourth, The existence of the corporate R&D center moderates the positive influence of small and venture firms' exterior R&D information network heterogeneity on their import substitution from technology development. 기술 진보 및 융합과 함께 매우 빠르게 변화하는 사업 환경은 기업의 성공에 있어서 연구개발(R&D)의 역할을 더욱 더 중요하게 하고 만들고 있다. 본 연구는 기업 수준의 683개 중소 벤처기업 데이터를 대상으로 최소 자승 회귀분석을 실시하여 다음과 같은 4가지 주요 사항을 새롭게 조명한다. 첫째, 중소 벤처기업의 외부 R&D 협력 네트워크의 다양성은 기술 개발로 인한 수입 대체에 정(+)의 영향을 준다. 둘째, 기업 부설 연구소의 존재는 중소 벤처기업의 외부 R&D 협력 네트워크의 다양성이 기술 개발로 인한 수입 대체에 주는 양(+)의 영향을 조절한다. 셋째, 중소 벤처기업의 외부 R&D 정보 네트워크의 다양성은 기술 개발로 인한 수입 대체에 정(+)의 영향을 미친다. 넷째, 기업 부설 연구소의 존재는 중소 벤처기업의 외부 R&D 정보 네트워크의 다양성이 기술 개발로 인한 수입 대체에 주는 양(+)의 영향을 조절한다.

협대역 표적 특징 융합에 의한 소나 다중표적 추적 성능 향상 ( Fusion of Target Spectrum Feature to A Passive Sonar Multi-Target Tracker )

허용석,이홍걸,이장식,오원천 대한전자공학회 1995 대한전자공학회 학술대회 Vol.1995 No.1

Linking the Big Five Model of Personality to Knowledge Sharing Intention

허용석 한국경영정보학회 2014 Asia Pacific Journal of Information Systems Vol.24 No.3

This study aims at empirically analyzing the relation between employees’ personality and their knowledge sharing intentions, on which enough light has not yet been shed in spite of its importance. By integrating the big five model of personality with social capital theory and social cognitive theory, this study develops six hypotheses concerning the relation and empirically tests them by using 724 samples collected from employees in practice. The empirical analysis results from this study reveal that employees’ extroversion and agreeableness are positively associated with their social relations and that their openness to experience and conscientiousness are positively associated with their knowledge self-efficacy, which are positively related to their knowledge sharing intentions. Based on the new findings, theoretical and practical implications are provided for knowledge management researchers and managers in practice.

The Impact of the External Information from SMEs’ Customers and Suppliers on Their Product Quality Improvement and Cost Reduction

허용석 한국자료분석학회 2017 Journal of the Korean Data Analysis Society Vol.19 No.3

The integrated supply chain network plays a critical role in increasing firms’ competitiveness which makes their business more successful in today’s high competition in the market sped up with technology convergence. In the perspective of the integrated supply chain network, this study constructed the research model to analyze and compare the influences of the external information from the customers and suppliers of the small and medium-sized enterprises (SMEs) on their product quality improvement and cost reduction that their technology development makes. Based on the ordinary least squares regression with the 2,000 data from the SMEs in the Republic of Korea through the IBM SPSS version 23, this study have revealed the two points as follows. One point is that the external information from customers has a more positive impact on SMEs’ product quality improvement than the external information from suppliers. The other point is that the external information from suppliers has a more positive influence on SMEs’ cost reduction than the external information from customers.