• 한국컴퓨터정보학회논문지
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• 제14권7호
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• pp.105-112
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• 2009

중소기업은 대기업에 비해, 정보기술에 대한 의존도가 높지만, 재정적인 어려움과 한정된 자원 및 노하우의 부족 등의 이유로 인해서 정보기술 및 정보 보안에 투자하는 비용은 크지 않다. 이로 인해서 정보 보안에 취약점이 많으며, 그로 인한 침해 사고도 많아지게 된다. 중소기업의 정보 보안 실무자들은 바이러스 방역 솔루션을 업데이트하고, 방화벽을 운영하며, 정기적인 시스템 패치를 적용하는 것이 정보 보안의 전부라고 생각한다. 하지만 보안 사로를 줄이기 위해서 보안 정책, 정보 유출 방지, 사업 연속성, 접근 제어 및 기타 많은 정보 보안 이슈들이 고려되어야지만 한다. 본 논문에서는 이러한 관점에서 대기업 위주의 보안 대책과 전략들을 중소기업 정보시스템의 안정적 운영에 적합하도록 새롭게 정리하여, 4가지의 관점엥서 정보 보안 고려 사항들을 도출하고, 정보 보안 전략을 제안한다.

• 한국학교ㆍ지역보건교육학회지
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• 제19권3호
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• pp.95-108
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• 2018

Objectives: The purpose of this study was to investigate the actual conditions and operational problems of Health Promotion Model School' in high school. Methods: We conducted a content analysis of 2014 results report and staffs' responses of five high schools among 85 'Health Promotion Model Schools' led by Ministry of Education from 2012 to 2014. Results: The study examined the operational process of health promoting schools in five stages; system development, needs survey & current status survey, school health policy development, program development & execution, and evaluation. Every step was found to be inadequate. In addition, the study discovered three key factors in operating health promoting schools and examined the status of each factor; connection with the curriculum, connection with the community, and consensus among members. Three factors were also applied poorly. Compared to elementary school, high school showed a lack of all respects. Health promoting school staffs have faced difficulties in linking community resources, organizing and operating a working committee, conducting surveys and assessing health problems, preparing self-assessment or external evaluation, and developing strategies and programs. In order to solve the operational problems, active cooperation of all teachers is urgent. Conclusion: 'Health Promotion Model School' conducted in high school is not considered to have faithfully implemented WHO's concept of health promoting school. In the future, incentive policies for health promoting school teachers should be actively reviewed.

• International Journal of Computer Science & Network Security
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• 제23권1호
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• pp.53-63
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• 2023

Many researchers are trying hard to minimize the incidence of cancers, mainly Gastric Cancer (GC). For GC, the five-year survival rate is generally 5-25%, but for Early Gastric Cancer (EGC), it is almost 90%. Predicting the onset of stomach cancer based on risk factors will allow for an early diagnosis and more effective treatment. Although there are several models for predicting stomach cancer, most of these models are based on unbalanced datasets, which favours the majority class. However, it is imperative to correctly identify cancer patients who are in the minority class. This research aims to apply three class-balancing approaches to the NHS dataset before developing supervised learning strategies: Oversampling (Synthetic Minority Oversampling Technique or SMOTE), Undersampling (SpreadSubsample), and Hybrid System (SMOTE + SpreadSubsample). This study uses Naive Bayes, Bayesian Network, Random Forest, and Decision Tree (C4.5) methods. We measured these classifiers' efficacy using their Receiver Operating Characteristics (ROC) curves, sensitivity, and specificity. The validation data was used to test several ways of balancing the classifiers. The final prediction model was built on the one that did the best overall.

• Journal of Power Electronics
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• 제5권3호
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• pp.198-205
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• 2005

The mechanical system of a drive can often be modeled as a two- or three-mass-system. The load is coupled to the driving motor by a shaft able to perform torsion oscillations. For the automatic tuning of the control, it is necessary to know the mathematical description of the system and the corresponding parameters. As the manpower and setup-time necessary during the commissioning of electrical drives are major cost factors, the development of self-operating identification strategies is a task worth pursuing. This paper presents an identification method which can be utilized for the assisted commissioning of electrical drives. The shaft assembly can be approximated as a two-mass non-rigid mechanical system with four parameters that have to be identified. The mathematical background for an identification procedure is developed and some important implementation issues are addressed. In order to avoid the excitation of the system with its natural resonance frequency, the frequency response can be obtained by exciting the system with a Pseudo Random Binary Signal (PRBS) and using the cross correlation function (CCF) and the auto correlation function (ACF). The reference torque is used as stimulation and the response is the mechanical speed. To determine the parameters, especially in advanced control schemes, a numerical algorithm with excellent convergence characteristics has also been used that can be implemented together with the proposed measurement procedure in order to assist the drive commissioning or to achieve an automatic setting of the control parameters. Simulations and experiments validate the efficiency and reliability of the identification procedure.

• 디지털융복합연구
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• 제10권11호
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• pp.185-196
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• 2012

IT 아웃소싱 운영의 효율적이고 품질 높은 서비스를 제공하기 위하여 정보시스템 운영 원칙을 세우고, 그 원칙을 통하여 운영관리가 이루어져야 한다. 따라서, 정보시스템 운영관리 프로세스를 참조한 정보시스템 운영관리 프로세스의 정립이 필요하다. 정보시스템 운영감리는 구축 개발 감리와는 다르게 일회성이 아닌 매주기별로 지속적인 감리가 필요함으로 운영관리 프로세스의 변화에 따라 운영감리 지침도 보완이 이루어져야 한다. 이에 본 논문에서는 IT아웃소싱 운영을 위한 정보시스템 운영감리 모형을 제안하였다. IT서비스 영역을 참조하여 계획, 전략, 계약, 서비스, 관리 등 IT아웃소싱 운영관리를 위한 정보시스템 운영감리 모형 및 점검항목을 제안하였으며, 도출된 감리모형 및 점검항목은 전문가들의 설문조사를 통하여 제안한 모형의 적합성을 검증하였다.

• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.8-15
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• 2021

This study was conducted with the purpose of exploring the dilemma and improvement strategies for the integrated management of extracurricular education programs at Duksung Women's University. The research method was finally composed of a procedure with a meeting of experts based on the procedure of collecting and analyzing the previous research literature. As for the contents of the study, the dilemma of the integrated management of the extracurricular education program at Duksung Women's University was presented first. Examples of dilemmas include difficulties in organizing and operating programs from the perspective of a roadmap customized for each grade level, difficulties in establishing a foundation for balanced mapping of core competencies and cultivating programs, difficulties in managing the performance of regular program monitoring and feedback improvement, and activating the linkage system between subjects and extracurricular education programs difficulties and difficulties in establishing a support system for the operation of the extracurricular education integrated management system were reflected. In addition, a strategy to complement and improve this dilemma was presented in a linkage. As a result of the study, the integrated management dilemma of Duksung Women's University's extracurricular education programs needs to be resolved in the long term through formal infrastructure such as external expert advice and expert exchange, and the development and use of related manuals should be considered aspects were analyzed. In addition, the content of this study was analyzed not only in the educational case of Duksung Women's University, but also in that it deals with cases that can be usefully referenced in most universities that develop and operate extracurricular education programs. Finally, this study presents an evidence-based practices that can be referenced in promoting the integrated management of extracurricular education programs in university sites, and the position and identity of extracurricular education throughout the university curriculum. It is judged that the significance and expected effect of the study can be obtained in that it provides an opportunity to improve from the management point of view.

• 전기전자학회논문지
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• 제26권1호
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• pp.10-18
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• 2022

정확한 SOC 추정은 배터리 운영 전략을 제시하는 중요한 지표로 많은 연구가 진행되었다. 기존 연구에서 검증을 위해 주로 사용되던 시뮬레이션 방식은 실제 BMS 환경처럼 실시간 SOC를 추정하기 어렵다. 따라서 본 논문에서는 실시간 배터리 SOC 추정이 가능한 임베디드 시스템을 구현하고 검증 과정에서 발생 가능한 문제 분석을 목표로 한다. 2개의 라즈베리파이 보드로 구성된 환경은 Simscape 배터리에서 측정된 데이터로 EKF 기반 SOC 추정을 진행한다. 검증 단계에서는 온도에 따라 달라지는 배터리 특성을 고려하여, 다양한 주변 온도에서 결과를 확인하였다. 또 임베디드 환경에서 발생하는 오프셋 오류와 패킷 손실에 대비하여, 문제 상황에서 SOC 추정 성능을 검증하였다. 이를 통해 안정범위의 5%내의 오차를 갖는 실시간 SOC 추정이 가능한 임베디드 시스템 구현을 위한 전략을 제시한다.

• 정보관리학회지
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• 제39권1호
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• pp.145-170
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• 2022

본 연구는 안양시의 정체성과 특수성을 고려한 도서관 중장기 종합 발전 계획 수립을 위한 운영 전략들을 도출하고자하는 목적으로 수행되었다. 이를 위해 본 연구에서는 다음과 같은 내용으로 진행되었다. 첫째, 안양시의 대내외 환경과 지역적 특수성 등을 파악하기 위해 안양시와 관련된 각종 문헌 자료 및 통계 자료들을 수집·분석해 정리하였다. 둘째, 「국가도서관통계시스템」 및 「경기도 공공도서관 연감」, 각종 도서관 관련 법규 등의 자료를 토대로 안양시 공공도서관의 운영 현황에 대해 파악하였다. 셋째, 안양시 공공도서관에서 근무하고 있는 사서 26명을 대상으로 안양시 정체성부터 현재의 도서관 운영 전반에 대한 의견을 수렴하기 위해 주관식 개방형 질문으로 구성한 설문조사를 실시해 분석하였다. 마지막으로, 앞서 정리한 현황 분석 내용과 최근의 도서관 트렌드, 정책 및 사회문화 환경 등을 반영해 향후 안양시 공공도서관의 중장기 발전 계획 수립의 토대가 될 수 있는 구체적인 운영 전략들을 ① 조직체계 및 인력 구성, ② 지역 간 균형 발전을 위한 시설 계획, ③ 장서 개발 및 보존 방향, ④ 특화주제 서비스 방안, ⑤ 협력체계 구축, ⑥ 홍보 방안의 여섯 가지 영역으로 구분해 제안하였다.

• 경영과정보연구
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• 제22권
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• pp.137-165
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• 2007

It seems high time to increase productivity by adopting e-business to overcome challenges posed by both external factors including the appreciation of Korean won, oil hikes and fierce global competition and domestic issues represented by disparities between large corporations and small and medium enterprises (SMEs), Seoul metropolitan and local cities, and export and domestic demand all of which weaken future growth engines in the Korean economy. The demands of the globalization era are for innovative changes in businessprocess and industrial structure aiming for creating new values. To this end, e-business is expected to play a core role in the sophistication of the Korean economy through new values and innovation. In order to examine business performance in e-business-adopting industries, this study analyzed the home shopping industry by closely looking into the financial ratios including the ratio of net profit to sales, the ratio of operation income to sales, the ratio of gross cost to sales cost, the ratio of gross cost to selling, general and administrative (SG&A) expense, and return of investment (ROI). This study, for best outcome, referred to corporate financial statements as a main resource to calculate financial ratios by utilizing Data Analysis, Retrieval and Transfer System (DART) of the Financial Supervisory Service, one of the Korea's financial supervisory authorities. First of all, the result of the trend analysis on the ratio of net profit to sales is as following. CJ Home Shopping has registered a remarkable increase in its ratio of net profit rate to sales since 2002 while its competitors find it hard to catch up with CJ's stunning performances. This is partly due to the efficient management compared to CJ's value of capital. Such significance, if the current trend continues, will make the front-runner assume the largest market share. On the other hand, GS Home Shopping, despite its best organized system and largest value of capital among others, lacks efficiency in management. Second of all, the result of the trend analysis on the ratio of operation income to sales is as following. Both CJ Home Shopping and GS Home Shopping have, until 2004, recorded similar growth trend. However, while CJ Home Shopping's operating income continued to increase in 2005, GS Home Shopping observed its operating income declining which resulted in the increasing income gap with CJ Home Shopping. While CJ Home Shopping with the largest market share in home shopping industryis engaged in aggressive marketing, GS Home Shopping due to its stability-driven management strategies falls behind CJ again in the ratio of operation income to sales in spite of its favorable management environment including its large capital. Companies in the Group B were established in the same year of 2001. NS Home Shopping was the first in the Group B to shift its loss to profit. Woori Home Shopping has continued to post operating loss for three consecutive years and finally was sold to Lotte Group in 2007, but since then, has registered a continuing increase in net income on sales. Third of all, the result of the trend analysis on the ratio of gross cost to sales cost is as following. Since home shopping falls into sales business, its cost of sales is much lower than that of other types of business such as manufacturing industry. Since 2002 in gross costs including cost of sales, SG&A expense, and non-operating expense, cost of sales turned out to have remarkably decreased. Group B has also posted a notable decline in the same sector since 2002. Fourth of all, the result of the trend analysis on the ratio of gross cost to SG&A expense is as following. Due to its unique characteristics, the home shopping industry usually posts ahigh ratio of SG&A expense. However, more than 80% of SG&A expense means the result of lax management and at the same time, a sharp lower net income on sales than other industries. Last but not least, the result of the trend analysis on ROI is as following. As for CJ Home Shopping, the curve of ROI looks similar to that of its investment on fixed assets. As it turned out, the company's ratio of fixed assets to operating income skyrocketed in 2004 and 2005. As far as GS Home Shopping is concerned, its fixed assets are not as much as that of CJ Home Shopping. Consequently, competition in the home shopping industry, at the moment, is among CJ, GS, Hyundai, NS and Woori Home Shoppings, and all of them need to more thoroughly manage their costs. In order for the late-comers of Group B and other home shopping companies to advance further, the current lax management should be reformed particularly on their SG&A expense sector. Provided that the total sales volume in the Internet shopping sector is projected to grow over 20 trillion won by the year 2010, it is concluded that all the participants in the home shopping industry should put strategies on efficient management on costs and expenses as their top priority rather than increase revenues, if they hope to grow even further after 2007.

• 한국IT서비스학회지
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• 제12권1호
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• pp.83-98
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• 2013

Advanced IT of Korea is the important factor that has improved the performance of business to business e-business systems, especially On-Line E-procurement System (KONEPS). Obviously KONEPS is well positioned in businesses of Korea. In order to be higher performance in KONEPS, it needed to be analysed important characteristics composed of KONEPS. Even though KONEPS has been operating well, user's satisfaction and customer loyalty for KONEPS was not high in real businesses. In this research, we tried to find the factors affecting user satisfaction and customer loyalty for KONEPS and figure out the mechanism among the factors. We surveyed using characteristics, which are information diversity, usability, system reliability and stability, on suppliers, main users of KONEPS. We consider the using characteristics as independent factors of the research model. Meanwhile, we model user's satisfaction and customer loyalty as the dependent factors. The results from the study are helpful in providing policies and strategies to promote the use of KONEPS.