소셜네트워크 분석을 통한 온라인게임 이용자커뮤니티 간 비교

하성호(Sung Ho Ha),임광혁(Kwang Hyuk Im),배현우(Hyun U Pae) 한국콘텐츠학회 2009 한국콘텐츠학회논문지 Vol.9 No.8

게임 산업은 멀티미디어 콘텐츠형 지식산업으로 세계적으로 지속적인 성장을 보이고 있다. 전체 게임산업 중에서 큰 비중을 차지하고 있는 분야가 온라인 게임 분야이며, 전체 게임 산업의 약 43%를 차지하고 있다. 온라인 게임은 대부분 월별 정액 요금제를 적용하는 만큼 제품이라기보다 서비스에 가까우므로 고객의 유지가 바로 기업의 현금흐름에 크게 기여하기 때문에 사용자의 만족도와 충성도가 매우 중요하다. 이렇듯 온라인 게임에서 사용자가 중요함에도 불구하고, 온라인 게임 자체에 대해서는 기존에 많은 연구가 이루어진 반면, 사용자 중심의 연구, 그 중에서도 사용자의 커뮤니티에 대한 연구는 부족한 실정이다. 본 논문은 온라인 게임의 특징과 그 속성을 선행연구를 통하여 조사하고 온라인 게이머의 커뮤니티의식과 소셜네트워크 형성에 영향을 미치는 요인을 파악하고자 한다. 또한, 온라인 게이머의 만족과 고객충성도에 커뮤니티 의식과 소셜네트워크가 영향을 미치는 지를 검증하여 온라인 게임을 개발하고 서비스 하는 기업에게 영업 전략을 제시하고자 한다. This paper investigates the influence of social networks on the satisfaction and loyalty of online game users. We gather the resulting questionnaires written by all respondents and compare social networks of users in the online game world. Social networks of online game users influence a sense of community. In consequence, the community sense influences the satisfaction and loyalty of online game users, respectively. Therefore, the companies which produce an online game and provide various services to users should consider the social networks and communities of their game users. Especially they have to try to manage the users who are the opinion leaders of the online game. If the companies make good relationships with users who are the opinion leaders of the online game, they would easily improve the loyalty of ordinary users by performing word-of-moth marketing of the users' opinions concerning about the online game.

The Effect of Perceived Usefulness, Perceived Web Site Quality, and Third Party Recognition on the Purchase Intention in C2C e-Commerce

Sung-ho Ha(하성호),Luo-tao Liu(류라도) 한국인터넷전자상거래학회 2009 인터넷전자상거래연구 Vol.9 No.4

인터넷의 발전으로 온라인 쇼핑은 한국에서 점점 대중화되고 있다. 특히, 소비자간 (C2C) 전자상거래가 점차 대중화되고 있다. 본 연구의 목적은 C2C 전자상거래에서 고객의 구매 의도에 관한 통합 모델을 제안하는 것이다. 선행연구에서 연구자들은 TAM 모형을 기반으로 지각된 웹사이트 품질이 온라인 비즈니스를 운영하는 중요한 요인이라는 것을 밝혔다. 본 연구는 구매의도가 지각된 웹사이트품질, 지각된 유용성, 제3자 인지, 만족과 신뢰에 영향을 받는다고 가설 설정하였다. 실증데이터는 구조방정식모델을 사용하여 분석하였으며, 지각된 웹사이트품질이 만족도에 미치는 영향과 지각된 유용성이 구매의도에 미치는 영향을 제외한 나머지 가설은 채택되어졌다.

코호넨네트워크와 생존분석을 활용한 신용 예측

하성호(Sung Ho Ha),양정원(Jeongwon Yang),민지홍(Jihong Min) 한국경영과학회 2009 韓國經營科學會誌 Vol.34 No.2

The recent economic crisis not only reduces the profit of department stores but also incurs the significance losses caused by the increasing late-payment rate of credit cards. Under this pressure, the scope of credit prediction needs to be broadened from the simple prediction of whether this customer has a good credit or not to the accurate prediction of how much profit can be gained from this customer. This study classifies the delinquent customers of credit card in a Korean department store into homogeneous clusters. Using this information, this study analyzes the repayment patterns for each cluster and develops the credit prediction system to manage the delinquent customers. The model presented by this study uses Kohonen network, which is one of artificial neural networks of data mining technique, to cluster the credit delinquent customers into clusters. Cox proportional hazard model is also used, which is one of survival analysis used in medical statistics, to analyze the repayment patterns of the delinquent customers in each cluster. The presented model estimates the repayment period of delinquent customers for each cluster and introduces the influencing variables on the repayment pattern prediction. Although there are some differences among clusters, the variables about the purchasing frequency in a month and the average number of installment repayment are the most predictive variables for the repayment pattern. The accuracy of the presented system reaches 97.5%.

비대면 은행서비스채널의 성능에 영향을 미치는 품질 요인

하성호(Sung-Ho Ha),주성현(Seong-Hyeon Joo) 한국산업경영학회 2010 경영연구 Vol.25 No.4

본 연구는 은행 서비스를 이용하는 고객들이 직접 종업원이나 직원을 통한 금융서비스 제공이 아닌 비대면 채널, 즉 인터넷뱅킹과 CD/ATM을 이용하는 실제 은행 고객들에 대한 실증조사를 통해 비대면 채널 서비스에 대한 일반 고객들의 이용현황과 이러한 비대면 채널 서비스로부터 지각한 정보시스템 품질요인(정보품질, 서비스품질, 시스템품질)들이 은행에 대한 고객 만족에 미치는 영향요인의 관계를 살펴보게 된다. 한국은행(2010)의 보도 자료에 따르면 계좌조회와 계좌이체(송금) 서비스 거래비중의 차이가 인터넷뱅킹 채널과 CD/ATM에 많은 차이가 나는 것으로 조사되었다. 이를 바탕으로 서비스형태(계좌조회, 계좌이체)에 따른 정보시스템품질요인과 사용자만족의 관계를 분석하고 서비스충성도의 연관성을 분석하였다.그 결과, 은행의 비대면 채널별 서비스형태에 따라 사용자만족과 서비스충성도에 영향을 미치는 정보시스템품질 요인이 다르다는 사실을 확인할 수 있었다. 먼저 자동화기기(CD/ATM)의 경우 계좌조회 서비스와 계좌이체(송금) 서비스를 이용할 때 이해성, 응답성, 신뢰성, 보안성이 각각 서비스형태에 따라 사용자만족에 대한 영향력 관계에 차이가 있는 것으로 나타났다. 또한, 인터넷뱅킹의 경우 계좌조회 서비스와 계좌이체(송금) 서비스를 이용할 때 정확성, 이해성, 응답성, 보안성, 편리성이 각각 서비스형태에 따라 사용자만족에 대한 영향력 관계에 차이가 있는 것으로 나타났다. 이를 통해 비대면 채널별 서비스형태에 따라 정보시스템 분야의 차별화된 전략을 통해 은행 이용 고객의 만족도를 높일 수 있을 것으로 기대하며, 정보시스템품질 요인들을 은행의 비대면 채널 활성화 방안을 마련하기 위하여 차별화된 정보시스템을 개발하고 업그레이드하는데 반영할 수 있을 것이다. This study is not for the advantage of customers who get their banking services through “face to face” communication with bank employees, but for the benefit of the indirect service channels, mainly focused on Internet banking, that target the common customers who have experience with indirect banking services. The surveys were about the current situation that the common customer’s perception of utilizing indirect banking service, in the view of quality factors for information systems (quality of information, quality of service, system quality) that influence customer satisfaction. The research results showed that the accuracy, responsibility, reliability, and ease of use of CD/ATM systems have a significant influence on user satisfaction with consideration to the account checking service. Regarding the fund transfer services, accuracy, reliability, security, and ease of use have a significant influence on user satisfaction. Both services have a significant influence on service loyalty. Also, the accuracy, understandability, reliability, and ease of use of Internet banking systems have a significant influence on user satisfaction with consideration to the account checking service. Regarding the fund transfer services, accuracy, reliability, security, and ease of use have a significant influence on user satisfaction. Both services have a significant influence on service loyalty. As indicated in this study, with the different forms of banking services, by utilizing the different operation plans flexibly, the amount of business and business plans of indirect banking service can be promoted. Ultimately, it can be anticipated that an increase in the revenue of the bank will happen. It can be expected that according to the trend of cooperation inside the banking industry, the integration of multichannel information system services will emerge in the future.

인터넷전화(VoIP)의 신규고객 유치를 지원하는 데이터마이닝 모델

하성호(Sung Ho Ha),양정원(Jeong Won Yang),송영미(Young Mi Song) 한국데이타베이스학회 2010 Journal of information technology applications & m Vol.17 No.2

Recently, Internet Telephony has become increasingly popular in telecommunication industry. However, previous research on Internet Telephony has focused on analyzing specific Internet Telephonysolutions, identifyingthe Internet Telephony movement itself. The research on prediction models about Internet Telephony adoption has been minimal. The main propose of this study is to develop models for predicting transition intention from using traditional telephones to using Internet Telephony. To do so, this study uses data mining methods to analyze demands in the IT communications market and to provide management strategies for Internet telephony providers. Especially this study uses discriminant analysis, logistic regression, classification tree, and neural nets to develop those prediction models toward Internet Telephony adoption. The models are compared with each other and a superior model is chosen.

Intelligent Data Envelopment Analysis (IDEA) for Efficiency Enhancement

하성호(Sung-Ho ha),김태훈(Tae-Hun Kim),홍한국(Han-Kuk Hong) 국제e-비즈니스학회 2008 e-비즈니스 연구 Vol.9 No.3

스마트폰 뱅킹서비스에 대한 사용자만족과 지속적 이용의도에 영향을 미치는 요인

하성호(Sung Ho Ha),주성현(Seong Hyeon Joo),김도형(Do Hyung Kim) 한국인터넷전자상거래학회 2012 인터넷전자상거래연구 Vol.12 No.4

In recent years, smartphone is one of the most famous IT devices in Korea. Since January 2010, the electronic banking safety regulations set by the Financial Supervisory Service have enforced that both wired Internet banking and smartphone banking services require the similar level of security. The number of mobile banking customers based on smartphone have increased sharply compared to the past. In addition, sales growth regarding the smartphone banking service has continued. The purpose of this study is to discover such factors which much influence satisfaction and continuance intention of use in the smartphone banking service. In doing so, we chose several characteristics of the smartphone banking channel(convenience, security, convergence, and economy) and users(familiarity and innovativeness) as independent variables. We selected continuance intention of use as a dependent variable for this study. Through a statistical experimental analysis, we found that both convenience and convergence have a significant influence on perceived usefulness along with perceived trust. Both security and economy have a significant effect on perceived trust only. Familiarity affects perceived usefulness as well as perceived trust, and innovativeness only affects perceived usefulness. Finally we found that perceived trust affects perceived usefulness and satisfaction at the same time; perceived usefulness affects both satisfaction and continuance intention of use; and satisfaction affects continuance intention of use in sequence.

Ionic liquid pretreatment of cellulosic biomass

Sung Ho Ha(하성호) 한국신재생에너지학회 2013 한국신재생에너지학회 학술대회논문집 Vol.2013 No.05

인터넷뱅킹시스템 품질이 서비스형태별 사용자만족과 서비스충성도에 미치는 영향

하성호(Sung-ho Ha),주성현(Seong-hyeon Joo) 한국인터넷전자상거래학회 2010 인터넷전자상거래연구 Vol.10 No.1

Based on the reports of the Bank of Korea, people use the Internet banking services usually for the two different transactions, such as account checking and fund transfer. From the perspective of the service in the Internet banking channel, this study analyzed the influence of the quality factors of information systems on both user satisfaction and service loyalty. The research results showed that the accuracy, understandability, reliability and ease of use of the Internet banking systems have a significant influence on user satisfaction with regard to the account checking service. Regarding the fund transfer services, the accuracy, reliability, security and ease of use have a significant influence on user satisfaction. Both services have a significant influence on service loyalty. This channel analysis contributes the increase in revenue to the bank and promotes the analysis on non-face-to-face banking channels. Ultimately, it is expected that the multichannel information system services will be integrated in the near future, keeping face with the trend of coordination in the bank industry.

간세포에서 반묘 독성에 대한 감초의 보호효과

하성호 ( Seong Ho Ha ),김상찬 ( Sang Chan Kim ),박숙자 ( Sook Jahr Park ) 대구한의대학교 제한동의학술원 2018 東西醫學 Vol.43 No.2

Objective : Cantharides, the dried medicinal insect, has been used to treat seminal weakness and chronic inflammation of the bladder. However, cantharides is irritating and toxic when used in large amounts. This study investigated the effects of licorice on hepatic cell toxicity induced by high dose of cantharides. Methods : Cantharides and licorice were prepared by extracting 200 g of dry samples in 1.5ℓ of water for 3 h. MTT assay was used to determine cell viability. After culture, the cells were stained with MTT solution for 4 h. The dark blue crystals of formazan were dissolved with dimethylsulfoxide, and the absorbance of the formazan solution was measured at 570 nm. Results : Cantharides showed strong cytotoxic activity in hepatic cells. However, cotreatment of licorice markedly recovered the number of viable cells compared to those samples without treatment. Furthermore, we examined the hepatoprotective effect of the major components of licorice, glycyrrhizind (Gly), isoliquiritigenin (ILQ) and liquiritigenin (LQ). Of the three major compounds, ILQ and LQ showed significant cytoprotective effects. Conclusion : These results provide evidence that objectively explains the role of licorice, which has long been used for detoxification purposes in Korean medicine.