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( Junsang Ahn ),( Kisung Kwon ),( Yeayoung Noh ),( Jihyun Lee ) 한국체육학회 2016 국제스포츠과학 학술대회 Vol.2016 No.1
Purpose: Professional sport teams’ market expansion efforts are triggered to broaden their revenue sources and overcome the challenges posed by mature or saturated markets that they operate in. Although tapping into a new market can be realized through signing star athletes, extant studies have yet to practically examine the true effect of such method. Therefore, the purpose of this study was to examine the role of signing a sport national icon as a tool for market expansion for professional sport teams. Method: An experimental study with a repeated-measure design was undertaken to achieve aforementioned purpose. The samples were collected at a large national university in Seoul and responses of each participant were measured twice in the span of four weeks. At the end of the survey, participants responded to an open-ended question regarding their attitude or feelings toward the transfer news and the signing team. Result: The results derived through multiple steps of data analysis demonstrated that there was a significant increase in respondents’ loyalty toward the team when they were exposed to a fictitious news article of the team signing their national icon. These empirical findings are supported by qualitative evidence from our open-ended question regarding the transfer news and the signing team. Conclusion: Many professional sport teams’ marketing efforts are now geared toward international market expansion. However, no research to date has empirically examined the effect of market expansion efforts in the realm of sport marketing literature. The current study aimed to fill this gap. Among many different marketing platforms, signing star athletes as a tool for market expansion was empirically tested. Results of the current study provided managerial implications for teams tapping into a new market.
Combined Rotation and Advancement Flap Reconstruction for a Defect of the Upper Lip: 2 Cases
Junsang Lee,Suk Joon Oh,Sung Won Jung,고성훈 대한성형외과학회 2012 Archives of Plastic Surgery Vol.39 No.3
Many types of upper lip reconstruction have been introduced to treat defects after a tumor excision or trauma. The authors treated two cases of upper lip defects. A 35-year-old woman presented with a squamous cell carcinoma of the left upper lip that had invaded the corner of the mouth. After resecting the tumor, the defect was 3.7×3.5 cm in size. A 52-year-old woman presented with a dog bite of the right upper lip. The defect measured 4.0×2.2 cm in size. The two cases were reconstructed by combined rotation and advancement of a cheek flap. This technique produced a good functional outcome that allowed for oral competence and created an opening of adequate size. A combination of rotation and an advancement flap can be used to treat upper lip defects in a single-stage procedure. This approach produces a good functional and cosmetic outcome.
Error surface-aware modeling algorithm for quarter-pixel motion estimation
Junsang Cho,Suh, J. W.,Gwanggil Jeon,Jooheung Lee,Jechang Jeong IEEE 2012 IEEE transactions on consumer electronics Vol.58 No.3
<P>In this paper, an error surface-considered modeling algorithm for quarter-pixel motion estimation during video encoding is presented. We previously proposed two algorithms: a model-based quarter-pixel motion estimation (MBQME) algorithm and a hierarchical model-based quarter-pixel motion estimation (HMBQME) algorithm. MBQME is an interpolation-free algorithm that has a minimum motion estimation time, while HMBQME has selective interpolation according to the decision process. Consequently, the peak signal-to-noise ratio (PSNR) for HMBQME is better than that of MBQME, but the motion estimation time is also increased. As an alternative method, we propose an error surface-considered modeling algorithm. In this scheme, the tendency of the error surface is first assessed. Using the strength of the edge at the error surface, we can classify the error surface region as plain or textured. For plain regions, interpolation-free and simple-structured modeling is appropriate for the quarter-pixel motion estimation method. In this case, we modified conventional mathematical modeling algorithm suitable for plain region. For textured regions, additional interpolation is needed for more accurate modeling. We calculate the half-pixel SAD values and perform more accurate modeling so as to find the best motion vector (MV). The experimental results show that the proposed scheme has better PSNR performance than any previous algorithms with minimum motion estimation time.</P>
( Junsang Oh ),( Eunhyun Choi ),( Deok-hyo Yoon ),( Tae-yong Park ),( Bhushan Shrestha ),( Hyung-kyoon Choi ),( Gi-ho Sung ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.8
The study of metabolomics in natural products using the diverse analytical instruments including GC-MS, LC-MS, and NMR is useful for the exploration of physiological and biological effects and the investigation of drug discovery and health functional foods. Cordyceps militaris has been very attractive to natural medicine as a traditional Chinese medicine, due to its various bioactive properties including anti-cancer and anti-oxidant effects. In this study, we analyzed the metabolite profile in 50% ethanol extracts of C. militaris fruit bodies from three development periods (growth period, matured period, and aging period) using <sup>1</sup>H-NMR, and identified 44 metabolites, which are classified as 16 amino acids, 10 organic acids, 5 carbohydrates, 3 nucleotide derivatives, and 10 other compounds. Among the three development periods of the C. militaris fruit body, the aging period showed significantly higher levels of metabolites including cordycepin, mannitol (cordycepic acid), and β-glucan. Interestingly, these bioactive metabolites are positively correlated with antitumor growth effect; the extract of the aging period showed significant inhibition of HepG2 hepatic cancer cell proliferation. These results showed that the aging period during the development of C. militaris fruit bodies was more highly enriched with bioactive metabolites that are associated with cancer cell growth inhibition.
A Survey of Decentralized Finance(DeFi) based on Blockchain
Junsang Kim(김준상),Seyong Kim(김세용) 한국컴퓨터정보학회 2021 韓國컴퓨터情報學會論文誌 Vol.26 No.3
블록체인 기술은 2008년 나카모토 사토시라는 신원미상의 인물이 비트코인이라는 암호화폐를 제안하면서 시작되었다. 나카모토 사토시는 기존의 금융 시스템에 대한 불신을 가지고 있었고 은행과 같은 중개자 없이도 해킹이나 변조에 견고한 금융시스템을 블록체인 기술을 통해 구현하고자 했다. 사토시는 비트코인의 생성과, 거래의 위조를 방지하기 위한 기술로 블록체인을 제안하였고 이를 통해 화폐의 발행과 거래, 그리고 검증의 기능을 구현하였다. 이후 스마트 계약을 블록체인 상에서 구현할 수 있는 암호화폐인 이더리움이 개발되면서 예금, 대출, 보험, 파생상품 등 복잡한 계약이 필요한 금융상품을 암호화폐의 영역으로 끌어들일 수 있게 되었다. 또한 실물자산과 결합을 통해 금융 기관이 제공했던 상품을 대체할 수 있는 가능성도 확대해 나가고 있다. 이러한 애플리케이션들을 Decentralized Finance(DeFi)라고 정의한다. 본 논문은 전반적인 DeFi의 기술적 이해와 현재 운영되고 있는 어플리케이션의 소개를 위하여 작성되었다. 먼저 전반적인 DeFi를 구현하는 기술들과 생태계에 대해서 설명한 후 대표적인 DeFi 애플리케이션들을 특징별로 분류하여 설명한다. Blockchain technology began in 2008 when an unidentified person named Satoshi Nakamoto proposed a cryptocurrency called Bitcoin. Satoshi Nakamoto had distrust of the existing financial system and wanted to implement a financial system that is robust against hacking or mannipulation without a middleman such as a bank through blockchain technology. Satoshi proposed a blockchain as a technology to prevent the creation of the bitcoin and forging of transactions, and through this, the functions of issuance, transaction, and verification of currency were implemented. Since then, Ethereum, a cryptocurrency that can implement the smart contract on the blockchain, has been developed, allowing financial products that require complex contracts such as deposits, loans, insurance, and derivatives to be brought into the area of cryptocurrency. In addition, it is expanding the possibility of substituting products provided by financial institutions through combination with real assets. These applications are defined as Decentralized Finance (DeFi). This paper was prepared to understand the overall technical understanding of DeFi and to introduce the services currently in operation. First, the technologies and ecosystems that implement the overall DeFi are explained, and then the representative DeFi services are categorized by feature and described.