• 경영과학
• /
• 제23권1호
• /
• pp.75-85
• /
• 2006

The rectilinear Steiner tree problem (RSTP) is to find a minimum-length rectilinear interconnection of a set of terminals in the plane. It is well known that the solution to this problem will be the minimal spanning tree(MST) on some set Steiner points. The RSTP is known to be NP-complete. The RSTP has received a lot of attention in the literature and heuristic and optimal algorithms have been proposed. A key performance measure of the algorithm for the RSTP is the reduction rate that is achieved by the difference between the objective value of the RSTP and that of the MST without Steiner points. A hybrid evolutionary strategy on RSTP based upon nodes set is presented. The computational results show that the hybrid evolutionary strategy is better than the previously proposed other heuristic. The average reduction rate of solutions from the evolutionary strategy is about 11.14%, which is almost similar to that of optimal solutions.

• Journal of Power Electronics
• /
• 제19권1호
• /
• pp.99-107
• /
• 2019

This study proposes a new modulation strategy to deal with unbalanced output voltage that is based on three-level neutral-point-clamped cascaded rectifiers. The fundament idea is to reallocate the value of the voltage levels generated by each of the modules on the basis of space vector pulse width modulation. This proposed modulation strategy can reduce the switching frequency while maintaining the mutual-module voltage balance. First, an analysis of unbalanced output voltage is reflected. Then a new modulation strategy is introduced in detail. Internal module capacitor voltages are balanced by the selection of redundant vectors. Moreover, the voltage balance ability is calculated. Finally, the feasibility of this modulation strategy is verified through experimental results.

• 산업융합연구
• /
• 제19권6호
• /
• pp.1-10
• /
• 2021

본 연구는 글로벌 공급망 변화로 인해 국내외 기업의 투자유치를 통한 지역경제 활성화가 긴요한 시점에서 충청북도를 중심으로 공공외교를 활용한 지방정부의 경쟁력 강화 방안을 모색했다. 최근 글로벌 비즈니스 환경에서 나타나고 있는 주요 이슈를 정리하면, 글로벌 가치사슬의 지역화 강화, 리쇼어링 현상과 공급망 다변화, 디지털 전환을 통한 효율적인 글로벌 가치사슬 창출 등이다. 따라서 본 연구는 이러한 변화를 바탕으로 공공외교 전략의 필요성을 강조하고 SWOT 분석을 통해 충북의 대응 여건 및 세부 전략을 도출했다. 또한, 이를 종합하여 ABCD 모델을 기반으로 충북형 공공외교 전략을 수립하고, 충북의 경쟁력을 한 단계 업그레이드하기 위한 전략적 시사점을 제시했다.

• 한국정보전자통신기술학회논문지
• /
• 제8권6호
• /
• pp.544-550
• /
• 2015

현재, SNS으로 소통되는 의견들이 증가하고 있기 때문에 SNS 메시지로부터 의미 있는 정보를 유추해내는 오피니언 마이닝(Opinion mining) 기술이 중요해지고 있다. 본 논문은 반의어와 부사의 위치에 따라 가중치를 다르게 설정하여 SNS의 감성 정보를 정확하게 추출하는 오피니언 마이닝 기반 SNS 감성 정보 분석 전략(SEIAS, SNS Emotional Information Analysis Strategy)을 제안한다. 제안하는 SEIAS(SNS Emotional Information Analysis Strategy)는 첫째, 오피니언 마이닝 분석에 필요한 감성사전을 구축하고, 둘째, SNS 데이터를 실시간으로 수집하고, 수집된 SNS 데이터와 감성사전를 비교하여 SNS 데이터의 의견값을 산출한다. 특히, 데이터의 의견값을 산출할 때, 반의어, 부사의 위치에 따라 가중값을 다르게 설정함으로써 기존의 SO-PMI와 비교하였을 때 오피니언 분석결과의 정확도를 향상시켰다.

• 한국IT서비스학회지
• /
• 제20권2호
• /
• pp.127-146
• /
• 2021

Donation-based crowdfunding(DBC) is conducted from voluntary participation by project operators. It requires a different operational strategy than general crowdfunding. However, there is a limited amount of research on the operational strategy of DBC. This study explores the value co-creation(VCC) strategy of DBC and analyzes the operation of DonorsChoose.org. The research questions encompass the following: First, we identify the VCC activities of DBC. Second, we uncover activities of the platform operators that facilitate the participation of project operators in VCC activities. Third, we explore how VCC activities affect project operational performance and platform performance in DBC. By adopting a single case study method on DonorsChoose.org, this study provides meaningful insight and detailed understanding into the VCC in DBC. First, VCC processes of DBC are identified(Co-ideation, Co-design, Co-funding, Co-operation, and Co-evaluation). Also, interactions between platform operators and project operators were defined at each stage. Second, this study confirmed that standardization and simplification of platform operators, support for pre- and post-activity, and high-quality information delivery activities were critical. Third, we confirm that these VCC activities improve VCC operational performance and platform performance. The theoretical significance of this study is that the concept of VCC, previously concentrated on participants with economic drivers(consumers and investors), has been applied to the context of DBC, a form of participation by participants with non-economic drivers(supporters and donors). In addition, this study practically contributes to the practice of VCC strategy among various platform operating strategies in DBC.

• 경영정보학연구
• /
• 제5권1호
• /
• pp.129-146
• /
• 2003

기술 투자와 거래의 증가는 기술가치 평가에 대한 관심을 증대시키고 있으나 평가의 전문성과 기술가치의 다양성으로 인해 객관적인 기술 가치 평가가 용이하지 않은 문제점을 가지고 있다. 이 연구는 웹 기반의 대화형 기술가치 평가(WITV) 시스템을 개발하고 이 시스템을 이용한 기술가치의 평가 및 기술가치의 전략 분석에 그 목적을 두고 있다. WITV 시스템은 내적 기술가치(IVT)와 외적 기술가치(EVT)로 구성 된 기술가치 매력도(TVA) 모형을 이용하여 기술가치를 평가하고 해당 산업에서 기술의 가치를 제고하기 위한 전략을 분석하는데 이용되고 있다. 이 연구는 코스닥에 등록된 IT산업 의 중소 제조기업을 대상으로 TVA 모형과 WITV 시스템의 타당성과 적용가능성을 실험하였으며, 실험결과에 의해 그 효용성을 검증하였다.

• Structural Engineering and Mechanics
• /
• 제32권1호
• /
• pp.147-165
• /
• 2009

This study proposes a certain measure or investment strategy for decision making associated with seismic retrofitting. This strategy reduces the risk of a large-scale malfunction such as water supply loss under seismic risks. The authors developed a stochastic value index that will be used in the overall evaluation of social benefit, income gain, life cycle costs and failure compensation associated with existing lifeline systems damaged by an earthquake during the remaining service period. Optimal seismic disaster prevention investment of deteriorated lifeline systems is discussed. Finally, the present study provides a performance-based design method for seismic retrofitting strategies of existing lifelines which are carried out using the target probabilities of value loss and structural failure.

• 지식경영연구
• /
• 제9권3호
• /
• pp.107-123
• /
• 2008

Company strategy that considers market trend becomes a more important key to success in the new product development. Well-being as a present social trend has created a huge new product market. but with increasing number of camouflaged well-being products that are not fulfilled consumer needs. The purpose of this study is to understand the concept of well-being products from a consumer point of view an to find five consumer values based on the consumer value model of Sheth, Newman, and Gross(1991) through conducting content analysis from semi-structured individual In-depth Interviews. This study has a significance in identifying the detailed consumer value attributes and influence factors by collecting practical and reach qualitative data in the lack of systematic research of domestic well-being market and its products from a consumer point of view. The result of this study will be a foundation of future quantitative researches and provide a guideline to companys' well-being marketing strategy.

• 유통과학연구
• /
• 제22권2호
• /
• pp.51-61
• /
• 2024

Purpose: This comprehensive study delves into the intricate relationship between customer engagement, perceived risk, and perceived value within China's burgeoning e-commerce livestreaming sector. It focuses on how different customer engagement types in livestreaming influence their perception of value and risk. Research Design, Data, and Methodology: Adopting a convenience sampling approach, this research scrutinizes data collected from 852 consumers actively involved in e-commerce livestreaming shopping. Participants provided their insights through a meticulously designed questionnaire survey. Structural equation modeling helped examine the interplay between customer engagement, perceived risk, and value. Results: Significant impacts of customer engagement on perceived value and risk were found. Observation-based, conversation-based, and action-based engagements enhance perceived risk, while conversation-based and action-based engagement reduce perceived risk. Interestingly, observation-based engagement did not significantly affect perceived risk. The study also uncovered that perceived risk negatively impacts perceived value. Conclusions: The research offers insights into customer behavior and value creation in e-commerce livestreaming. It underscores how different engagement types affect perceived value and risk, aiding e-commerce platforms and businesses in strategy development to improve customer experience and minimize risks, enhancing perceived value in this dynamic sector. Enhances understanding of customer engagement dynamics in China's e-commerce livestreaming, guiding strategic development.

• 한국멀티미디어학회논문지
• /
• 제21권6호
• /
• pp.685-697
• /
• 2018

(Most companies that perform BPR have not achieved satisfactory results or have not performed successful BPRs. There are many reasons for this, but the most important one has caused problems that do not accurately reflect the requirements of various stakeholders. In this paper, we will apply the BPR consulting methodology to a new value innovation requirements engineering process based on the Blue Ocean strategy, which is a way to create a new market without competition by customerizing potential customers by satisfying new customer expectations and needs. This paper uses a requirements engineering process that can generate customer value by applying the ERRC(Erasure Reduce Raise Create) analysis method, which is the core of the Blue Ocean Strategy Framework[1,2]. We will also apply the Six Sigma DFSS (Design For Six Sigma) methodology to improve quality and process through quantitative and systematic analysis. The proposed approach was presented to the BPR consulting to present a practical case, and the results of the empirical analysis of the system user to validate the results of BPR consulting.