• Proceedings of the Korean Society for Quality Management Conference
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• 2009.10a
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• pp.176-181
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• 2009

Social networking service (SNS), which is based on the "six degree separation" theory, has gained its popularity in recent years. SNS creates a new way for maintaining relationship and sharing information over the virtual space. As a major branch, campus SNS provides a new platform for student to study as well as build and maintain inter-personal relationships. The highly realness of personal information and relatively strong group cohesion of campus SNS has turned it into an inevitable tool in students' daily life. The rapid growth of SNS in campus is creating huge academic and commercial benefits. However, little comprehensive research reveals what are determinant factors in driving students' intention to participate in campus SNS. In this paper, we conceptualize the participation of campus SNS as a social behavior and evaluate the impact made by social factors such as subjective norms and identity, as well as the impact of perceived reality and playfulness through an extended technology acceptance model.

• Journal of Korean Society for Quality Management
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• v.35 no.3
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• pp.55-65
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• 2007

The purpose of this study is to analyze the causal relationship among categories in the Korean National Quality Award(KNQA) model. The survey instrument consists of 79 questions from seven categories in the KNQA. Structural Equation Modeling(SEM) is used to analyze the empirical data and estimates the path coefficients among the KNQA categories. The result of this research indicates that Leadership drives systems that create Results through Foundation and Direction. Among eighteen hypotheses, sixteen hypotheses are statistically significant. Especially, this research indicates that Foundation and Direction are important mediating factors.

• Journal of Korean Society for Quality Management
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• v.40 no.2
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• pp.211-218
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• 2012

Over the last two decades, many information system researchers have developed the variables of information system using the measurement of user satisfaction. In context, this research developed the measurement of user satisfaction in smartphone application market and compared the difference of user satisfaction factors between Adroid market and App store. The results indicated that satisfaction of App store was more than that of Adroid market. The information system and customer-oriented factors of App store were higher than that of Adroid market.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.439-440
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• 2014

본 논문에서는 기업의 기존 특허 포트폴리오를 비즈니스 모델 컴포넌트의 관점에서 사업타당성 평가를 수행할 수 있는 연구개발 비즈니스 모델링 및 시뮬레이션 시스템을 제안한다. 제안 시스템은 기업이 보유하고 있는 기존 특허들의 기술적 가치를 평가하는 것이 아니라, 비즈니스 모델의 9가지 컴포넌트 관점에서 특허가 보유하고 있는 비즈니스적 특징을 분석할 수 있는 시스템이다. 평가 모델은 4가지 세부 평가모델로 구성하였으며, 시뮬레이션을 수행할 수 있는 기본 파라미터와 제어 파라미터를 제공하여서 파라미터들의 값을 조정하면서 다양한 환경에서의 평가 결과값을 실시간으로 확인할 수 있도록 구현하였다.

• Journal of Korean Society for Quality Management
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• v.35 no.1
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• pp.61-72
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• 2007

The purpose of this research is to identify causalities among service quality, service value, customer satisfaction and customer loyalty. A Structural Equation Model is used to test the hypothesis of conceptual model. To test the model, we collect data by conducting a survey with 508 patients. Empirical result indicates that three factors such as tangibles, assurance, and empathy have direct impact on service value and customer satisfaction. Especially, customer loyalty is positively related not with service value but with customer satisfaction.

• Journal of Korean Society for Quality Management
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• v.39 no.2
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• pp.188-198
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• 2011

The purpose of this research is to identify the effect of quality circles activities upon quality circles performance and business performance. Empirical results indicate that quality circle activities influence on quality circles performance in both individual and enterprise level, Quality circles performance influences on not employment satisfaction but customer satisfaction, business performance (profitability and market values) of companies with quality circles is higher than that of companies without quality circles. In conclusion, quality circle activities influence on quality circles performance that effect on business performance.

• Journal of Korean Neurosurgical Society
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• v.55 no.3
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• pp.167-169
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• 2014

Giant cell tumor (GCT) of the spine is a rare benign tumor, but can be aggressive and can exhibit a high local recurrence rate. Furthermore, GCT of the upper thoracic spine may pose diagnostic and management difficulties. Here, we report a rare case of GCT of the upper thoracic spine with soft tissue extension to the spinal canal. The patient was managed by decompressive laminectomy and posterolateral fusion followed by an injection of polymethylmethacrylate into the vertebral lesion. The patient recovered clinically and showed radiological improvement after surgical treatment without tumor recurrence at his last follow-up of postoperative 7 years. We present this unusual case of GCT and include a review of the literature.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.443-446
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• 2004

본 연구는 MPEG-21 프레임 기반 하에서 컨텐츠의 유통/관리와 툴의 유통/관리를 위한 요소 사항들을 분류하고 기술 사항들을 고려하여 모델을 작성하고 해당 모델을 시제품화 함으로써 제시된 모델의 적용성을 증명한다. 현재 MPEG-21은 DRM의 표준으로 진행되고 있으며 디지털 컨텐츠의 제작, 인식, 서술, 표현, 배급, 지적재산권 보호 등과 같이, 디지털 컨텐츠의 다양한 서비스 모델을 확립하고, 이러한 서비스 모델을 실현하기 위한 필수 요소 기술들을 정의하고 있다. MPEG-21 표준으로 사용자들이 멀티미디어 컨텐츠를 편리하게 전송, 검색, 저장 및 관리를 위한 컨텐츠의 유통/관리와 툴의 유통/관리 시스템을 구현하고자 한다.

• Safety and Health at Work
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• v.1 no.2
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• pp.134-139
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• 2010

Objectives: The lung cancer mortality in Korea has increased remarkably during the last 20 years, and has been the first leading cause of cancer-related deaths since 2000. The aim of the current study was to examine the time trends of occupational lung cancer and carcinogens exposure during the period 2006-2009 in South Korea, by assessing the proportion of occupational burden. Methods: We defined occupational lung cancer for surveillance, and developed a reporting protocol and reporting website for the surveillance of occupational lung cancer. The study patients were chosen from 9 participating university hospitals in the following 7 areas: Seoul, Incheon, Wonju, Daejeon, Daegu, Busan, and Gwangju. Results: The combined proportion of definite and probable occupational lung cancer among all lung cancers investigated in this study was 10.0%, 8.6%, 10.7%, and 15.8% in the years 2006 to 2009, respectively, with an average of 11.7% over the four-year study period. The main carcinogens were asbestos, crystalline silica, radon, polyaromatic hydrocarbons (PAHs), diesel exhaust particles, chromium, and nickel. Conclusion: We estimated that about 11.7% of the incident lung cancer was preventable. This reveals the potential to considerably reduce lung cancer by intervention in occupational fields.

• Journal of the Korea Society of Computer and Information
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• v.22 no.9
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• pp.49-55
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• 2017

Despite the Openflow's switch migration occurs after the channel was established in secure manner (optional), the current cryptography protocol cannot prevent the insider attack as the attacker possesses a valid public/private key pair. There are methods such as the certificate revocation list (CRL) or the online certificate status protocol (OCSP) that tries to revoke the compromised certificate. However, these methods require a management system or server that introduce additional overhead for the communication. Furthermore, these methods are not able to mitigate power abuse of an insider. In this paper, we propose a role-based identity-based cryptography (RB-IBC) that integrate the identity of the node along with its role so the nodes within the network can easily mitigate any role abuse of the nodes. Besides that, by combining with IBC, it will eliminate the need of exchanging certificates and hence improve the performance in a secure channel.