• Proceedings of the KIEE Conference
• /
• summer
• /
• pp.183-185
• /
• 2004

This paper deals with an application of optimization technique for available transfer capability(ATC) calculation. ATC is an important indicator of the usable amount of transmission capacity accessible by several parties for commercial trading. Sequential quadratic programming(SQP) is used to calculate the ATC problem with state-steady security constraints. The proposed method is applied to 10 machines 39 buses model systems. The results are discussed and compared to those obtained by continuation power flow(CPF).

• Journal of Fashion Business
• /
• v.25 no.6
• /
• pp.13-24
• /
• 2021

In the current economic downturn, it is easy for consumers to be emotional and regret their fashion product purchases. The purpose of this paper was to understand the effect of customer regret on the dissatisfaction and repurchase intention of fashion consumers in China, which is the world's largest fashion trading country. A total of 275 participants were recruited from a Chinese online survey system (www.sojump.com). The SPSS 22.0 statistical package was used for various data analyses. This study conceptualized the positive relationship between customer regret and dissatisfaction and the negative relationship between dissatisfaction and the repurchase intention of fashion goods. The findings indicated that customer regret could be categorized into two distinct types, chosen and forgone regrets. Chosen regret had a greater effect than forgone regret on dissatisfaction. The negative influence of dissatisfaction on repurchase intention was weak in consumers with a high level of regret-solving effort. The results of this study will help fashion businesses retain their customers, thus gaining long-term and repurchase economic value for the fashion industry.

• Asia Pacific Journal of Business Review
• /
• v.3 no.2
• /
• pp.67-87
• /
• 2019

Anti-dumping instruments among trading partners have been the subject of research by both academicians and practitioners. This study attempts to establish an early-warning model of anti-dumping against Chinese textile exporting companies, which have suffered from anti-dumping regulations and got arbitration awards. After reviewing theories of anti-dumping arbitration, early-warning and relationship marketing, the measuring items and relationship marketing model of Chinese textiles exporters are investigated. Empirical methods are selected based on early-warning theories of companies. Eighty percent of 156 valid questionnaires by surveys and interviews are used as training data via Binary-Logistic regression while the other twenty percent are validated in the model. As a result, a proper early-warning model has been established.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2018.11a
• /
• pp.87-89
• /
• 2018

We proposed an improved reliable SVD-based watermarking scheme resistant to geometric attacks while having high fidelity with no false-positive problem. Principal components of a watermark image are embedded into singular values of LL, LH, HL, and HH sub-bands of a transformed cover image by RDWT(redundant discrete wavelet transform) with optimal scale factors. Each scale factor is generated by trading-off fidelity and robustness using Differential Evolution (DE) algorithm. Zernike Moment (ZM) is used to estimate the geometric distortion and to correct the watermarked image before extracting watermark. The proposed scheme improves fidelity and robustness of existing reliable SVD based watermarking schemes while resisting to geometric attacks.

• Journal of Korea Multimedia Society
• /
• v.24 no.2
• /
• pp.255-266
• /
• 2021

Most common web or application system architectures have central network. As a result, central network can be supervised and controlled in all situation. And It has the advantage of easy to manage and fast to work. However, central network have a disadvantage of weak to security and unclear. In particular, many institutions used by web system be has many problems by central network. In this paper, we proposed blokchain technology based on ethereum to resolve of problem and trading structure that arise in cental network. We propose a decentralized application based on points including cryptocurrency functions and smart contract to the advantages of blockchain with a decentralized structure. The results of the performance experiment are as follows; It has shown the advantages of reliable use and security in a variety of environments(Windows, Ubuntu, Mac).

• Journal of Distribution Science
• /
• v.20 no.4
• /
• pp.101-110
• /
• 2022

Purpose: This study is a comparative study to examine the differences between Incoterms 2010 and Incoterms 2010 through a study on the revision contents and conditions of Incoterms 2020. Research design, data, methodology: This study is composed of 5 chapters through literature study. Chapter 1 is an introduction, and Chapter 2 explains the significance and change of standard trading conditions. Chapter 3 compares Incoterms 2020 and 2010. Chapter 4 deals with major revisions and considerations of Incoterms 2020, and Chapter 5 mentions conclusions and implications. Results: In comparison with Incoterms 2020 and Incoterms 2010, first, the selection of the correct Incoterms rules was emphasized through the introduction; second, the division and connection between the sale contract and the ancillary contract were more clearly explained; and third, each Incoterms An explanatory note was presented by improving the existing guidance note for rules, and finally, the order of clauses within individual Incoterms rules was changed to further emphasize delivery and risk. Conclusions: This study pays attention to the understanding of academic content related to standard trade terms and conditions and how usefully it can be used in the business process of users in practice.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2020.05a
• /
• pp.191-194
• /
• 2020

본 연구에서는 안전하면서도 쉽게 사용할 수 있는 블록체인 기반의 중고 책 거래 플랫폼을 개발하였다. 이 플랫폼은 블록체인의 특성을 이용해 거래 제품 및 거래내역을 공유원장에 기록하여 거래내역을 투명하게 공개하며 누구나 열람 가능하다. 이는 데이터의 무결성과 투명성을 보장하며 신뢰성 있는 거래 환경을 제공한다. 이를 사용할 경우, 기존 중고거래 시스템에서 발생 가능한 데이터의 위조, 변조의 문제점과 불확실한 신뢰 문제가 해결되어 중고거래 사기사건을 예방할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2022.11a
• /
• pp.664-666
• /
• 2022

현재 중고거래 시장은 빠르게 성장하고 있으며, 중고물품 거래는 쓰지 않는 물건을 나눠 쓰고 재사용하는 중고거래 문화로 하나의 지역 생활 트렌드로 자리 잡고 있다. 이에 따른 가장 큰 이점은 환경보호와 자원의 재활용이다. 따라서 본 연구는 사용자의 밀집도가 높은 대학교를 공략하여 중고거래를 활성화하려 한다. 편의성과 실용성 있는 서비스를 제공하기 위하여 파이어베이스와 T-map을 기반으로 안드로이드 프레임워크에서 사용하여 구현하였다. 본 애플리케이션의 주 서비스는 중고물품 거래, 실시간 채팅 그리고 위치 기반 서비스이다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2024.01a
• /
• pp.441-442
• /
• 2024

최근 경제적 어려움과 물가 상승으로 인해 생활비 부담이 증가함에 따라, 생활비 절감을 위해 중고 거래를 이용하는 대학생들이 증가하고 있다. 그러나 기존 대학생을 위한 중고거래 플랫폼은 제한적이며, 대학 커뮤니티에서는 서적 중심의 거래로 중고 거래의 다양성이 부족하고 해당 서비스 이용이 번거롭다. 이러한 점을 개선하기 위해, 본 연구에서는 대학생들이 다양한 중고 물품을 저렴하게 학교에서 직거래할 수 있는 중고거래 및 대여 시스템인 "U-bo"를 개발하였다. 효율적인 거래 관리 시스템과 실시간 채팅 기능을 통해 사용자 경험을 향상시키며 맞춤형 이용이 가능하다. "U-bo"를 통해 학생들의 생활비 절약과 환경 보호에 기여할 것으로 기대된다.

• Journal of Industrial Convergence
• /
• v.20 no.12
• /
• pp.179-186
• /
• 2022

This study aims to develop a predictive model to suggest a used sales price to sellers and buyers when trading used tablet PCs. For model development, we analyzed the real used tablet PC transaction data and additionally collected detailed product information. We developed several predictive models and selected the best predictive model among them. Specifically, we considered a multiple linear regression model using the used sales price as a dependent variable and other variables in the integrated data as independent variables, a multiple linear regression model including interactions, and the models from stepwise variable selection in each model. The model with the best predictive performance was finally selected through cross-validation. Through this study, we can predict the sales price of used tablet PCs and suggest appropriate used sales prices to sellers and buyers.