Identifying plausible scenarios is necessary to evaluate the performance of the repository reliably over a very long period. All features, events, and processes (FEPs) expected in the repository should be comprehensively well-defined and structured into scenarios based on the relation analysis. A platform for the FEP DB management and relation analysis is needed to facilitate the efficient composition of the scenarios. For this purpose, the CYPRUS program was developed, but abandoned due to suspended FEPs and scenario research. Thus, it became necessary to build a new easy-tomaintain platform that inherits the legacy of CYPRUS and reflects the latest research. The data structure and user interface configuration were derived to develop a new platform. The new platform provides extensive data such as the assessment context, the FEP DB, the interaction between FEP contents, the relevance to other project FEPs, the influence on performance, the scenarios for the TSPA, the AMF, and the PA Data. The platform displays the long-term evolution FEPs developed by KAERI, the international and major project FEPs in table format. The correlation between FEP items is composed of a detailed interaction matrix and visualized as the chord diagram or arc diagram. The relevance and linkages between the project FEP items are mapped and presented in the form of network diagrams and network tables. The platform designed in this study will be used to manage the FEP DB, analyze and visualize the relationship between the FEP and scenarios, and finally construct the performance assessment scenarios. It is expected that the platform itself will be used as a part of the knowledge management system and facilitate efficient collaboration and knowledge exchange among experts.

The mandatory installation of the ECDIS (Electronic Chart Display and Information System) became an important navigational equipment for navigation officer. In addition, ECDIS is a key component of the ship's digitalization in conjunction with various navigational equipment. Meanwhile, cyber-attacks emerge as a new threat along with digitalization. Damage caused by cyber-attacks is also reported in the shipping sector, and IMO recommends that cybersecurity guidelines be developed and included in International Security Management (ISM). This study analyzed the cybersecurity hazards of ECDIS, where various navigational equipment are connected. To this end, Importance-Performance Analysis (IPA) was conducted on navigation officer using ECDIS. As a result, the development of technologies for cyber-attack detection and prevention should be priority. In addition, policies related to ‘Hardware and Software upgrade’, ‘network access control’, and ‘data backup and recovery’ were analyzed as contents to be maintained. This paper is significant in deriving risk factors from the perspective of ECDIS users and analyzing their priorities, and it is necessary to analyze various cyber-attacks that may occur on ships in the future.

The number of elevators in Korea has surpassed 700,000 units in 2019, which is the 8th in the world by number of installed units and 3rd in the world by new units. The word 'lift' is a representative word, and the category includes elevators, escalators, dumb waiters, and moving walks. Those who live in the city will experience using elevators once or twice a day, and these elevators are becoming an indispensable means of transportation when using high-rise apartments or subways. However, such a convenient elevator also has a lot of risks that threaten the safety of the user and actually cause many accidents every year. In particular, escalators (including moving walks), which account for as little as 5% of all elevators, account for 70% of all elevator accidents. According to Heinrich's chain of thought theory, accidents are caused by a combination of factors, which are divided into five stages: Stage 1: Genetic Factors and Social Environment, Stage 2: Individual Defects, Stage 3: Unsafe behavior and Unsafe conditions, Stage 4: Accident, Stage 5: Injury. Heinrich said that three of these five phases, unsafe behavior and unsafe conditions, require safety management and efforts to prevent accidents. In escalator accidents, the analysis of accident cases that have occurred so far will be related to unsafe behaviors and unsafe conditions, and the effective management of these causes of accidents will enable safer and more convenient use of escalators. This study analyzed accident cases of elevator users, focusing on escalator accidents over the last 10 years (2010 ~ 2019), and safety management to prevent safety accidents of elevator users by analyzing the behavior of actual users and questionnaires of experts in related fields. The method was studied.

The use of Project Management Information System (PMIS) is increasing in project management industries such as construction, defense, manufacturing, software development, telecommunication, etc. It is generally known that PMIS helps to improve the quality of decision making in project management, and consequently improves the project performance. However, how much and which parts of project management performance are affected by PMIS still need to be studied further. The purpose of this study is to investigate the impact of PMIS quality on project management performance. We collected data from various project based industries such as construction, defense, manufacturing, software development and telecommunication by using survey questionnaire. PMIS quality was measured in three dimensions. They are system quality, information quality and service quality. Project management performance was measured in nine variables such as time reduction, work accuracy, cost management, etc. Statistical analyses such as multiple regression were used to analyze the data. The results showed that PMIS quality had significant impacts on the project management performance and user satisfaction. It was notable that only two dimensions out of the three PMIS quality dimensions, system quality and information quality, affected the project management performance. Also, it was found that PM performance played a mediating role between PMIS and user satisfaction, and between PMIS and reuse intention. The contribution of this research is that it helps to clarify what aspects of PMIS affect the project management performance and user satisfaction.

As the users continuously play the mobile game, the mobile game service requires a method to manage their information such as their game play score and their own game items. For the purpose of responding to the user requests in real time, the proposed method reduces the size of the database by separating the information of inactive users from the main database. Considering the construction cost, the proposed method moves the information of the inactive users to the file instead of another secondary database system. In order to minimize the effect of the system environment such as CPU or memory, the proposed method depends on the response time to the user request rather than the last login time or the number of the user accounts. For the safety and consistency of the database, the proposed method utilizes a traditional RDBMS rather than NoSQL.

DRM은 온라인 음악, 동영상, e-book 등 디지털 형태의 콘텐츠가 증가하면서 불법 복제가 쉬워짐에 따라 저작권자의 권리가 침해되는 것을 방지하기 위한 목적으로 생긴 기술이다. 아날로그 유통구조와는 다른 디지털 콘텐츠 유통 시장에서 콘텐츠 및 지적 재산권을 보호하고 이용자에게 새로운구매 서비스를 제공함으로써 소유에서 사용 권리로의 이동을 가능하게 하였다. DRM의 필요성이 커짐에 따라 저작권자는 DRM과 같은 기술적 보호 조치를 엄격히 요구하고 있다. 현재의 DRM 방식이 사용 용이성은 떨어지지만 이용자 또한 저작권의 보호와 콘텐츠의 올바른 이용에는 대부분 저작권자와 의견을 같이 한다. 콘텐츠 제공업체는 DRM을 이용하여 다양한 서비스를 설계하고 서로 다른 가격을 줌으로써 이용자들에게 서로 다른 권리를 제공할 수 있다. 이에 이용자들은 기호에 따라 보다 더 다양한 방법으로 차별성을 가진 콘텐츠를 구매할 수 있다. 앞으로 이용자의 디지털 콘텐츠 수요는 지속적으로 증가할 것으로 보이며 DRM의 중요성도 더욱더 커질 것이다.

경기도 과천시와 서울의 서초구, 강남구를 흐르는 양재천은 1995년부터 자연형 하천복원사업이 시작된 대표적인 도시하천이다. 연구대상지인 강남구 관내 구간은 하천과 접하여 대규모 주거단지가 조성되어 인근 주민들의 이용압이 높은 지역으로 본 연구는 하천복원에 의해 이용이 증가한 양재천의 이용현황 및 특성 등을 파악하고, 이것을 바탕으로 친환경적인 관리방안을 제안하기 위하여 수행되었다. 이용자 설문조사에서 총 유효설문 303부를 회수하여 분석한 결과, 양재천은 근린주구의 주민들이 여유시간에 운동(51.8%)과 산책(24.4%)을 중심으로 한 이용이 많으며, 정기적으로 이용하는 비율아 높고, 혼자(30.4%) 내지는 가족중심(28.4%)의 이용이 일반적이었다. 시설물을 확충할 경우에는 그늘이 있는 쉼터(80.8%)가 가장 우선적으로 필요한 시설물로 파악되었으나, 전반적으로 시설물의 추가도입은 필요 없는 것(78.8%)으로 분석되었다. 공원이용에 대해서는 종합적으로 만족(59.6%)하는 이용자가 많았으나, 안전문제(22.0%), 편의시설부족(17.6%), 그늘쉼터의 부족(16.6%) 등이 주요 문제점으로 지적되었다. 이상의 문제점을 해결하기 위한 방안으로 보행자와 자전거, 인라인 스케이트 이용자가 함께 이용하고 있는 겸용노선에 사인표시와 이용매너 등을 홍보하고 기존 제방산책로는 녹음효과를 보완하여 보행전용화하며, 제방사면의 소단을 활용한 산책로의 신설을 통해 현재의 둔치산책로의 이용압력 분산을 유도하는 동선체계의 정비방안을 구상하였다. 하천 내부의 녹음공간 확보를 위한 녹음수 식재는 현재 법적으로 규정하고 있는 수목식재기준에 의해 둔치 및 소단하부는 하천환경에 적합한 초본식물을 식재하며, 산책로 주변은 녹음제공이 가능한 습지성 자생 목본식물을 식 재하도록 하였다. 소단 내 수목식재에 있어서는 교목식재가 가능한 한 남측 사면은 20m 간격으로 교목 2열 교호식재를 하며, 소단상부는 각 구간별로 계절감을 연출할 수 있는 식물을 도입하는 방안을 제안하였다.

According to increasing extended use of ERP from intranet to extranet environment, from enterprise internal use to suppliers and business partners and from wired to wireless devices, it became very important to authenticate proper user allow to access proper application module and database, not only to protect enterprise information asset but also keep data integrity. In this document, we introduce the technologies of privilige management infrastructure, role based access control and the building of privilige management system for ERP implementation regarding this point of view.

A company needs low cost and high efficient S/W tools to improve the white color productivity in daily operation, These needs may be satisfied by end-user knowledge management system to be suggested in this paper. We suggest that the end-user knowledge management is not made by specialized developer but directly made by end-users of some related managers using company-wide DB and department DB. We expect that this end-user knowledge management system will increase the efficiency of end-user daily operation and minimize the total life cycle cost of end-user computing system in industry. The suggested end-user knowledge management system has been tested in some companies through the training course.