• Bulletin of the Korean Chemical Society
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• 제3권4호
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• pp.140-144
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• 1982

Through-space and through-bonds interactions between two nonbonding orbitals are shown to be first-order and second-order perturbations of nonbonding orbitals by the framework sigma orbitals. Through-space interactions for diamines and triplet diradicals are always destabilizing, but through-bonds interactions are stabilizing owing to their coupling with through-space effect. Anomalies in level ordering and magnitudes of energy splitting can be rationalized with the present approach. Orbtial interactions predicted with the PMO method were found to be consistent with those obtained by STO-3G calculations and photoelectron spectroscopy.

• 한국식품저장유통학회지
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• 제5권1호
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• pp.65-71
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• 1998

The changes in gel characteristics of soy protein as a result of various reagents that alter specific interactions which affect the formation and textural properties of gels, were studied. The reagents were added to 15% soy protein solutions prior to heat treatment. The gels were not formed with urea, indicating that hydrogen bonds significantly contributed to the formation and hardness of soy protein gel. Hydrophobic interactions and disulfide bonds compensated for hydrogen bonds and the contributions of electrostatic interactions to gel hardness are relatively insignificant. The farce primarily responsible for gel cohesiveness appeared to be disulfide bonds, because a significant decrease in cohesiveness was found only with the presence of N-ethylmaleimide. Adhesiveness decreased only with the addition of urea, and thus the contribution of hydrogen bonding to adhesiveness of gel could be concluded to be resent. However, adhesiveness was suggested to be interpreted not only wile molecular forces involved in gel formation but also with hydration properties of protein.

• 대한산업공학회지
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• 제43권1호
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• pp.30-38
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• 2017

Contingent convertible (Coco) bonds have been issued in 2009 after financial crisis for improvement of capital structure in international banks. With more focuses on coco bonds in financial market, academic fields have paid attention to the instrument for optimal structure for issuers and rational pricing methodologies. However, there is a crucial discrepancy in prevailing pricing model and their target subjects. Though most of the coco bonds have been issued based on accounting triggers, many of existing models are based on market prices and therefore exhibit limitations in practical use. In this paper, a more practical pricing method for accounting triggered coco bonds is proposed using stochastic equity ratio process. Empirical results tested on coco bond issued by JB financial group supported the proposed approach with favorable performance in tracking actual market prices.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2005년도 추계학술대회
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• pp.255-271
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• 2005

This paper aimed to exam core factors of the relationship factors and analyze their effects on structural bonds and social bonds. And this paper analysis structural bonds and social bonds effects on relationship commitment. To accomplish this purpose, this study examined previous studies and summarized core factors of the relationship making. The result of this study are as follow: First, we examined that 6 factors-tech-shared, product characteristic, transaction specific asset, reputation, trust, communication-were relationship factors of buyer-seller industrial market. Second, it is shown that tech-shared, product characteristic, transaction specific asset factors have a positi-ve influence on the structural bonding. Third, it is shown that reputation, trust, communication factors have a positive influence on the social bonding. Fourth, it is shown that structural bonding, social bonding have a positive influence on the relationship commitment.

• 전기학회논문지
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• 제58권2호
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• pp.308-313
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• 2009

This paper presents a reliability analysis of S-bonds for AF track circuits, which detect train movement and transmit a speed control signal to the train. Field survey shows that S-bonds are exposed to very large vibrations transferred from rail, and suffer from frequent failures when they were installed on ballasted track. We collected the time-to-failure data of S-bonds from the maintenance field of Seoul metro line 2, and made a parametric approach to estimate the statistical distribution that fits the time-to-failure data. The analysis shows that S-bonds have time-to-failure characteristics described by Weibull distribution. The estimated shape parameter of Weibull distribution is 1.1, which means the distribution has constant failure rate characteristics like exponential distribution. The reliability function, hazard function, percentiles and mean lifetime are derived for maintenance support.

• Bulletin of the Korean Chemical Society
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• 제10권6호
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• pp.568-572
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• 1989

Terphenyl dialdehyde 6 was obtained in 17.4% overall yield through oxidative coupling, methylation, and bisformylation reactions starting from p-cresol, and then coupled intermolecularly using McMurry reaction to give 22-membered macrocylic host 7 in 14.4% yield. In crystal structure host 7 has $C2_v$ symmetry with cis-cis configuration of two double bonds. Four methoxy groups adjacent to double bonds and the other two methoxy groups are directed opposite side, forming a cavity which can nest a guest. The cavity is filled by two inward-turned methyl groups out of four methoxy groups adjacent to double bonds. The kinetically controlled reaction mechanism leading to cis product was proposed. The cation binding properties of 7 were obtained using picrate extraction experiment from $D_2O\; into\; CDCl_3\; at\; 25^{\circ}C$. All the spherical cations (from $Li^+ to NH4^+)$ are complexed with free energies of $7.3{\pm}0.3$ kcal/mol.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.330-334
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• 2011

Build-operate-transfer (BOT) projects are privatized infrastructure undertakings that face long-term investment risks and uncertainties. To ensure these projects can be completed on time and operated according to performance specifications, governments usually require BOT concessionaires to furnish performance bonds as a security. However, in order to attract investment, governments often provide abandonment rights for concessionaires to deal with investment risks and uncertainties. In the context of real options, these abandonment rights will increase project value, but the furnish of performance bonds will reduce this value. Currently in the BOT context, there is no real option model that can handle explicitly the impact of performance bonds on project value. In this paper, a real option valuation model is derived to deal with this important issue. The Taiwan high-speed rail project is used as a case study to show the applicability of the proposed model.

• 아태비즈니스연구
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• 제12권3호
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• pp.379-396
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• 2021

Purpose - The purpose of this paper is to study the rational payoff from the standpoint of foreign investors and the government when the government issues GDP-linked bonds to foreign investors. Design/methodology/approach - In this paper, the prices of 12 types of GDP-linked bond structures, which are classified according to the calculation cycle of the rate of change of linked GDP, the currency issued, and whether options are embedded, were evaluated. The Fama-French 3-factor model and the GMM-SDF model are used in the asset pricing model, and domestic and overseas investors used different basis assets. Findings - The KRW premium for US investors is estimated to be 43bp on a quarterly basis and 30bp on an annual basis, respectively, meaning that when the government issues bonds in KRW, the interest rate paid to US investors will be reduced by 30bp to 160bp (annually converted). Using the Fama-French 3 factor model, the KRW premium is the risk premium for the US market beta, meaning that if US investors do not intend to invest in US market beta, it is advantageous to receive an additional interest rate by investing in USD-denominated GDP-linked bonds. Korea's GDP- linked bond give US investors diversified investment utility, so they are willing to incorporate Korean GDP-linked bonds even if -150bp of interest is deducted from the structure issued to Korean investors. And as a result of estimating the value of the option through the GDP-linked bond with options that provides a floor for guaranteeing the principal, the value of the option linked to the annual GDP issued in dollars was the lowest. Research implications or Originality - Issuing dollar-denominated GDP-linked bonds linked to annual GDP with the option of guaranteeing the principal by the government is a way to increase investment opportunities for US investors and achieve financial stability of the government.

• 디지털융복합연구
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• 제16권4호
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• pp.11-22
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• 2018

사회적기업을 비롯한 사회적경제기업들은 우리사회가 가지고 있는 다양한 사회문제를 혁신적인 비즈니스의 방식으로 해결해 나가고 있다. 그럼에도 불구하고 사회적경제기업들은 부족한 자본으로 인해 성장을 위한 투자에 한계가 있다. 이러한 자본투자의 한계를 사회적금융으로 해결하고자 하는 노력들이 다양하게 시도되고 있다. 성과에 기반한 보상을 금융시스템에 도입한 사회성과연계채권이 부족한 자본을 조달할 수 있는 새로운 수단으로 인식되고 있다. 선행 연구를 통해 전 세계적으로 19개국에서 89개의 사회성과연계채권이 발행되었으며, 22개의 프로젝트가 성과를 보고하고 있으며, 21개의 프로젝트가 긍정적인 사회적 성과를 창출하고 있음을 나타내고 있다. 12개 프로젝트는 투자자에게 성과급을 지급하고 있다. 사회복지 예산의 확대가 어려운 정부 차원에서 사회성과연계채권의 발행에 대해 검토할 유인을 제공하고 있다고 할 수 있다. 본 연구를 통해 사회성과연계채권의 성과를 확인하고, 국내 도입 가능성을 찾을 수 있었다. 정부의 사회복지예산을 수요에 맞춰 지속적으로 증가시키는 것은 한계가 있기 때문에 민간의 투자를 바탕으로 사회적경제 기업의 성장을 지원할 수 있는 사회성과연계채권의 발행을 통해 선순환적인 사회적금융 시장을 조성할 수 있을 것이다.

• 한국콘텐츠학회논문지
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• 제11권12호
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• pp.674-681
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• 2011

조선 시대 인쇄물인 삼강행실도는 세계 만화역사에서도 이른 시기인 1434년에 간행되었다. 삼강행실도에는 만화기호인 '만화칸'과 '칸과 칸 사이'가 등장한다. 만화기호인 만화칸의 상징성 못지않게 칸과 칸 사이도 만화기호에서 상징적 의미가 있다. 만화역사의 측면에서 보면 칸이 등장한 후, 칸과 칸 사이가 등장한 그 자체만으로도 의미를 부여할 수 있다. 그 상징적 근거들을 찾아 밝힘으로써 국내 만화역사의 역사적 근거가 다져질 것이다. 삼강행실도에서는 칸과 칸 사이의 형식적인 유형을 크게 두 가지로 나눌 수 있다. 첫 번째는 '구름칸과 구름칸 사이'이며, 두 번째는 '구름칸과 배경칸 사이'이다. 삼강행실도의 두 가지 유형인 칸과 칸 사이는 현대 만화와 비교할 때 모양이나 연출에서 차이를 보이지만 칸과 칸 사이의 의미는 유사하다고 하겠다. 이처럼 본 연구는 삼강행실도의 칸과 칸 사이의 형태를 분석함으로써 국내 만화역사의 타당한 근거를 제시하는 데 의미가 있다. 만화기호 중에서도 칸과 칸 사이에 초점을 맞추어, 삼강행실도의 칸과 칸 사이의 형태를 증명하는 것이 연구의 목적이다.