• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.600-612
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• 2009

Special banks primarily using Internet have different properties in transactions with customers, risk management, capital strength, and branch networks with general banks. The success and failure factors of Internet banks have been explained only by the economies of scale, and learning and experience effects of Internet banks based on the perspective of organizational ecologies. In this study, the success factors of Internet banks are investigated based on strategic choice by organizations and resource-based view of the firms instead of organizational ecology perspective. To this end, 31 major Internet banks operating in overseas market have been classified by the size and profitability of banks, and three strategic groups have been derived. three representative company cases were analyzed. critical success factors of Internet banks were derived, and considerable points when operating Internet banks were discussed.

• Convergence Security Journal
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• v.16 no.2
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• pp.25-34
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• 2016

This study aims to prevent the serious threat from dangerous person or group by responding or blocking or separating illegal activities by use of SNA: Social Network Analysis. SNA enables to identify the complex social relation of suspect and individuals in order to enhance the effectiveness and efficiency of investigation. SNS has rapidly developed and expanded without restriction of physical distance and geo-location for making new relation among people and sharing large amount of information. As rise of SNS(facebook and twitter) related crimes, terrorist group 'ISIS' has used their website for promotion of their activity and recruitment. The use of SNS costs relatively lower than other methods to achieve their goals so it has been widely used by terrorist groups. Since it has a significant ripple effect, it is imperative to stop their activity. Therefore, this study precisely describes criminal and terrorist activities on SNS and demonstrates how effectively detect, block and respond against their activities. Further study is also suggested.

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.8
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• pp.1117-1123
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• 2011

Ungrounded power systems are adopted onboard vessels which enable more stabilized power supply even in case of electric leakage to hull. If earthing faults happen at these systems, they make grounding impedances of power lines unbalanced each other on the three phases, resulting in high voltages to hull which can bring more possibilities of electric shocks and electric fires. This study focuses on how to configure a calculation module for transferring a grounded condition by lowered insulation resistance into a vector diagram of the voltages to hull. By using the module, the loci of neutral points were acquired to analyze how voltages to hull are affected by earthing faults and the distributed capacitances between power lines and hull. The suggested module was simulated and compared to the measured values from a test power system in good results.

• Korean Security Journal
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• no.41
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• pp.213-240
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• 2014

How will South Korea design well-organized, open, and integrated counterterrorism system? Does this system work well in the emergent situation? These are very significant issues. It is likely that this system would give the solution. A legal basis needs to be established to have a well-organized, open, and integrated counterterrorism system. The core part of a well-organized, open, and integrated counterterrorism system is to minimize and eliminate damage caused by terror through preventiveness, preparation, action, and restoration. For having this system, they need to be divided into two section: an open one and an integration one. In this study, there will be a discussion on a new and appropriate counterterrorism system fit in South Korea a subordinate system: legal, organized, civil aspects need to be provided on the basis of an well-organized, open, and integrated counterterrorism system and an analysis on the current system of the States, England and the following implications.

• The Korean Journal of Applied Statistics
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• v.24 no.2
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• pp.253-268
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• 2011

In this paper, we estimate systematic risk from credit migration (or transition) matrices under "Asymptotic Single Risk Factor" model. We analyzed transition matrices issued by KR(Korea Ratings) and concluded that systematic risk implied on credit migration somewhat coincide with the real economic cycle. Especially, we found that systematic risk implied on credit migration is better than that implied on the default rate. We also emphasize how to conduct a stress test using systematic risk extracted from transition migration. We argue that the proposed method in this paper is better than the usual method that is only considered for the conditional probability of default(PD). We found that the expected loss critically increased when we explicitly consider the change of credit quality in a given portfolio, compared to the method considering only PD.

• Journal of the Korea Convergence Society
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• v.11 no.8
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• pp.71-76
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• 2020

This study measured radioactive surface contamination in general public restrooms in hospitals and in dedicated toilets for nuclear medicine. The measurement method was measured using Berthold (LB 124, Germany) at the entrance to the restroom, inside the restroom, around the restroom, in the urinal, and around the urinal. As a result of the use of the restroom, there was no dedicated place waiting for patients who received radioisotopes in one of the three hospitals. As a result of measuring the restroom for exclusive use of radioisotopes, all measurement sites in the radioiodine therapy room were the highest, and the results of measuring the public restrooms showed background level contamination at all hospitals except hospital B. However, it was measured as 8.073 Bq/㎠ and 6.426 Bq/㎠ in the urinals in the public restroom on the first floor of the B hospital. Therefore, it is recommended to explain the dangers of radiation exposure to patients and provide a place for patients to wait. In addition, a plan should be sought to prevent patients from receiving radioisotopes from using unnecessary movements and general public restrooms.

• The KIPS Transactions:PartD
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• v.10D no.4
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• pp.697-708
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• 2003

In a software product line approach, developers first develop common software architecture and components by analyzing the characteristics of all software members, and then produce each application by integrating components. The approach is considered very effective means for developing and maintaining in parallel a software product family. Main disadvantage of this approach is that it requires a big up-front investment in preparing product line. Therefore, it takes time to deliver the first version. In this paper, we present an incremental method to develop software families, which requires small additional cost for initial versions and allows an organization to move smoothly to full-scale product line. We present our method by explaining how to record and upgrade the results of variations analysis, and show the application of our method by developing a family of YBS. Our method is a low-risk approach that can be effectively applied to an organization that starts developing software systems but has to deliver the first versions quickly to the market.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.11
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• pp.957-964
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• 2010

The deflagration-to-detonation transition (DDT) causes a strong pressure wave that can adversely affect surrounding structures. The pressure generated by multiple detonative pulses is strong enough to cause metal surface erosion and chipping of the edges of bulk structures. In this study, we investigate the damage caused by the DDT phenomenon and perform hydrocode simulations to evaluate the structural damage caused to a metallic pulverized-coal injector used in a pulverized-coal-oxygen combustion furnace. The experimental conditions are selected in order to accurately model the damage caused to metal injectors that are exposed to multiple DDT pulses.

• The Journal of the Korea Contents Association
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• v.17 no.10
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• pp.179-189
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• 2017

The purpose of this paper is to develop a comprehensive research model that can explain potential customers' intentions to adopt and use VPA(Virtual Personal Assistants) devices. This study proposes and validates a new theoretical model that extends the perceived value theory. Partial least squares analysis is employed to test the research model and corresponding hypotheses on data collected from 313 survey samples. Perceived value, perceived usefulness, perceived enjoyment are important factors affecting the adoption of VPA devices. To increase potential users' intention to use, VPA device manufacturers should not only focus on developing utilitarian functions but also fun features based on open development echo-system. This study is the important empirical attempt to examine user acceptance of VPA devices, as most of the prior literature has concerned analysis of usage patterns or technical features.

• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.287-292
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• 2016

본 논문에서는 카페테리아 복리후생의 기본개념의 고찰과 함께 국내 및 국외에서 활용되고 있는 카페테리아 플랜에 대한 사례연구를 통해 A항공사(航空社)를 중심으로 새로운 종업원 복리후생제도 도입을 제시하고자 한다. 복리후생제도 도입방안은 다음과 같다. 첫째, 선택적 복리후생제도에 대한 종업원들의 공감대를 형성하는 것이다. 항공사는 대체로 노동조합이 잘 발달되어 있는 편이고 종업원들의 학력수준도 높은 편이다. 따라서 사내교육 등을 통하거나 노조 설명회를 통하여 전반적인 사회변화에 따른 다양한 선택적 복리후생제도의 효율성, 종업원 니즈에 대한 충족도의 우수성, 저가항공사의 난립에 따른 필연적 M&A 등이 발생할 경우를 대비하여 필요하다는 점, 종업들의 원가에 대한 이해(cost contiousness)가 높아질 수 있다는 점, 등에 대해 알리고 이해를 시킬 필요가 있다. 둘째, 기존에 일률적으로 제공되고 있는 우대탑승제도는 종업원마다 매년 일정한 한도가 부여되지만 티켓을 소비하는 횟수는 각각 다르다. 또한 항공업의 특성상 성수기로 인해 원하는 시간에 원하는 곳을 갈 수 없다는 큰 문제점이 발생하고 곧 니즈 욕구에 대한 불만족으로 직결 한다. 우대탑승 제도에 부여된 항공 티켓 지원은 비수기나 여유 있는 좌석상황에 따라 소비할 수 있기 때문에 종업원의 만족도는 높지 않게 나타난다. 따라서 종업원의 수혜수준을 종업원이 스스로 선택할 수 있게 함으로써, 사원 스스로의 니즈에 맞게 복리후생 계획을 세울 수 있게 하는 카페테리아플랜 즉 선택적 복리후생제도의 도입의 검토가 필요하다. 이런 선택적 복리후생제도는 종업원의 측면에서 좀 더 자신의 상황과 요구에 부합하는 복리후생을 수혜함에 따라 만족도가 증가하고, 스스로 복리후생을 선택함으로써 동기를 부여하는 측면의 의의가 있다. 그러나 현 기업의 능력과 종업원 의식에 대한 정확한 분석 및 이해가 없는 외부 성공사례의 도입은 지금까지 우리나라 많은 기업들의 경영기법 도입사례와 같이 일과성으로 끝나는 위험성도 크다. 따라서 보다 깊은 자기 성찰을 통한 제도의 수용과 이를 부분적으로 개선 및 보완하여 적용할 줄 아는 지혜가 무엇보다도 우선되어야 할 것이다.