• 한국IT서비스학회지
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• 제5권1호
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• pp.47-59
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• 2006

According to the policy for "e-Korea construction" of Korean government, Investment of information system during the past decade are dramatically increasing. More than a half of this investment is cost of hardware infrastructure. So, accurate hardware sizing are essential for higher efficiency of investment. Accurate hardware sizing benefits are generally viewed in terms of the avoidance of excess equipment and lost opportunity costs by not being able to support business needs. Unfortunately, however, little research effort to make the hardware sizing methodology are doing. We propose a sizing method for information system in public sector. This method is determinate empirical study that are gathering and analyzing cases, making method and reviewing expert. Finally we are proposed calculating method for hardware components that is CPU, memory, internal and external disk according to the application system type which is OLTP, Web, WAS. Our study certainly will act as a catalyst for higher investment-efficiency of the future information programs in public sector.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.1703-1709
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• 2008

The TTX(Tilting Train eXpress) has tilting mechanism that is not existed in the previous train. So, the characteristics of suspension will be different from others. For this reason, TTX needs to be investigated about the suspension in contrast with the previous suspension system. The 2nd damping ratio is very important for a tilting mechanism. Proper value of suspension characteristics should be suggested for the tilting train. In this paper, the optimization of suspension systems for TTX model is introduced by using Design of Experiments (DOE) which is the design of all information-gathering exercises where variation is present. At first, the dynamics model is made for evaluating characteristics of suspension system. Second, using evaluated value, suspension characteristics are analyzed for sensitivity analysis. Finally, using the result of a sensitivity analysis, the suspension systems are optimized.

• Journal of Information Processing Systems
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• 제17권4호
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• pp.772-786
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• 2021

The process of tracking suspicious behavior manually on a system and gathering evidence are labor-intensive, variable, and experience-dependent. The system logs are the most important sources for evidences in this process. However, in the Microsoft Windows operating system, the action events are irregular and the log structure is difficult to audit. In this paper, we propose a model that overcomes these problems and efficiently analyzes Microsoft Windows logs. The proposed model extracts lists of both common and key events from the Microsoft Windows logs to determine detailed actions. In addition, we show an approach based on the proposed model applied to track illegal file access. The proposed approach employs three-step tracking templates using Elastic Stack as well as key-event, common-event lists and identify event lists, which enables visualization of the data for analysis. Using the three-step model, analysts can adjust the depth of their analysis.

• 디지털산업정보학회논문지
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• 제5권4호
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• pp.39-49
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• 2009

Nowadays, according to rapid development of computing environments, information processing and analysis system are very interesting research area. As a viewpoint of data preparation-processing-analysis in knowledge technology, the goal of automated information system is to satisfy high reliability and confidence and to minimize of human-administrator intervention. In addition, we expect the system which can deal with problem and abnormal error effectively as a fault detection and fault tolerance. In this paper, we design a monitoring system as follows. A productive monitoring information from various systems has unstructured forms and characteristics and crawls informative data by conditions and gathering rules. For representing of monitering information which requested by administrator, running-status can be able to check dynamically and systematic like connection/closed status in real-time. Our proposed system can easily correct and processing for monitoring information from various type of server and support to make objective judgement and analysis of administrator under operative target of information system. We implement semi-realtime monitering system using AJAX technology for dynamic browsing of web information and information processing using XML and XPATH. We apply our system to SMS server for checking running status and the system shows that has high utility and reliability.

• 한국도로학회논문집
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• 제7권4호
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• pp.57-68
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• 2005

현재 국내의 차종 분류 기준은 그 조사목적과 조사지점에 따라 이원화되어 운영되고 있다. 고속국도와 지방도의 경우는 8종 분류 기준이 그리고 일반국도의 경우는 11종 분류 기준이 활용되고 있는데, 이러한 이원화된 분류 기준은 자료 활용의 효율성을 저하시키고 있는 실정이다. 본 연구는 이러한 이원화된 차종 분류 기준의 문제점을 해결하기 위해 통합된 차종 분류 기준을 제시하고 있다. 분류 기준은 차량 제원에 의한 기계식 조사에 초점을 맞추었으며, 현장 조사의 문제점을 완화하기 위해 인력식 조사에도 적용이 가능하도록 설정되었다. 제안된 차종 분류 기준은 차량의 다양화 및 대형화 추세를 반영하고, 기타 차종 분류 기준과의 호환성을 고려하고 있어 보다 합리적인 차종 분류 기준이라 할 수 있다.

• 조명전기설비학회논문지
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• 제26권7호
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• pp.99-109
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• 2012

Sub-station, key equipment in electric power infrastructure, are being exposed to increasing risk of hacking. For this, soft redundancy sub-station system needs to be formulated with automatic restoration mechanism. For this it is important to assess the reliability of the applicable range of data that are used in actual system operation, as well as the methods and findings of the tests. At the same time performance of soft redundancy system and total security mechanism, which are aligned for the protection of the sub-station, need to be tested. For testing the above-mentioned, this paper presented a viable formation of a soft redundancy practical VPN system within a panel to protect the latter from hacking or cracking incidences, and conducts a test to check if the considered system actually serves the protection function in the actual operation setting, gathering evidence from the data from the testing of the actual performance of the system as well as of emergency scenario simulation operations. Because tested soft-redundancy & restorative sub-station system is expected to be widely applicable for various cases such as Smart-grid or electricity IT system, where VPN with enhanced level of security is required.

• Journal of Information Processing Systems
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• 제17권6호
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• pp.1179-1190
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• 2021

A data acquisition and monitoring system was developed for an automated system of a smart fish farm. The fish farm is located in Jang Hang, South Korea, and was designed as circulation filtration system. Information of every aquaculture pool was automatically measured by pH sensors, dissolved oxygen sensors, and water temperature sensors and the data were stored in the database in a remoted server. Modbus protocol was used for gathering the data which were further used to optimize the pool water quality to predict the rate of growth and death of fish, and to deliver food automatically as planned by the fish farmer. By using JSON protocol, the collected data was delivered to the user's PC and mobile phone for analysis and easy monitoring. The developed monitoring system allowed the fish farmers to improve fish productivity and maximize profits.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제15권4호
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• pp.260-264
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• 2009

센서네트워크 시스템을 응용한 u-Healthcare 시스템 기술에 대한 많은 연구가 진행되고 있다. 이를 사람이 아닌 동물에 적용시켜 애완동물의 상태를 웹을 통하여 관리할 수 있는 uPetCare(Ubiquitous Pet-Care System)을 설계 및 구현하였다. uPetCare System의 주된 기능으로는 1) 센서를 통한 데이터의 수집, 2) 멀티-홉 통신 3) 싱크 노드에서의 데이터 압축(compression) 및 정리(aggregation), 4) 웹 서버에서의 데이터 저장, 5) AJAX 기술을 통한 실시간 정보 확인 6) 상황 인지 시스템을 통한 펫 관리 시스템을 포함한다.

• 정보교육학회논문지
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• 제5권3호
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• pp.364-373
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• 2001

이 논문에서는 초중등학교의 PC와 통신 장비에 대한 운영을 종합적으로 관리하기 위한 통합 관리시스템을 설계하고 구현하였다. 제안된 시스템은 PC의 시스템 정보 관리, 네트워크 정보 관리, 원격관리 등의 기능과 라우터의 회선 관리 및 성능분석 기능을 제공한다. PC 관리를 위한 시스템 및 네트워크 구성 정보 모니터링이 가능하며, 원격 PC의 화면을 수집하여 현 상황 파악이 가능하다. 네트워크장비의 관리를 위해 SNMP를 이용한 회선 인터페이스 정보 수집과 폴링에 의한 이용률 등의 분석 기능을 제공하고 있다. 통합 관리 시스템을 통해 시스템 관리 교사가 PC및 네트워크 요소에 대한 자원정보 수집과 모니터링이 가능하여 학교 내 모든 전산 자원에 대해서 일괄 관리가 가능하다.

• 약학회지
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• 제54권4호
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• pp.309-315
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• 2010

The Positive List System was newly introduced in South Korea as of January 2007. This study aims to survey and compare perception of and attitudes toward the Positive List System in the process of new drug listing that health professionals and pharmaceutical companies have. 50 professionals and 52 companies answered the questionnaire regarding health policy environments, policy decision/enforcement process, policy effects and satisfaction related to introducing the Positive List System. SAS 9.1 was used for statistical analyses. The results showed that participants had the general sympathy with health policy environments for the introduction of the Positive List System into South Korea. However, the response rates of policy decision/enforcement process and effects were negative and these tendencies were more striking in pharmaceutical companies. As for policy satisfaction, participants marked positive responses more than negative ones. It is necessary to remedy and supplement problems with policy decision/enforcement policy and effects revealed in this study and to improve the Positive List System through gathering opinions among groups and organization concerned.