• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.1D
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• pp.71-77
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• 2010

This study presented the operation method through of productivity on eight analysis work items (TBM boring, cutter check and exchange, TBM maintenance, succeeding facilities, reinforcement in tunnel, operation alternation, a tram car) which have developed equipment at WRITH with TBM a waterway tunnel works. It was inquired lose time with analyzed result by work items and removed lose time. It was analyzed TBM boring length, TBM boring length percentage and TBM boring length time. This study analyzed TBM operation utility factor of a foreign work with TBM operation boring length percentage, a monthly average boring length, pure boring length percentage etc. and assumed a monthly average boring length and a monthly average boring length of rise forecast. Based on analyzed Data, TBM boring has been forecasted propriety pure boring length at compressive strength $675{\sim}1662kgf/cm^2$.

• The Journal of Korean Society for Radiation Therapy
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• v.17 no.2
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• pp.105-111
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• 2005

Purpose : Daily Q.A is the important step which must be preceded in a radiation treatment. Specially, radiation output measurement and laser alignment, SSD indicator related to a patient set-up recurrence must be confirmed for a reasonable radiation treatment. Daily Q.A proceeds correctness and a prompt way, and needs an objective measurement basis. Manufacture of the device which can facilitate confirmation of output measurement and appliances check at one time was requested. Materials and Methods : Produced the phantom formal daily check device which can confirm a lot of appliances check (output measurement and laser alignment. field size, SSD indicator) with one time of set up at a time, and measurement observed a linear accelerator (4 machine) for four months and evaluated efficiency. Results : We were able to confirm an laser alignment, field size, SSD indicator check at the same time, and out put measurement was possible with the same set up, so daily Q.A time was reduced, and we were able to confirm an objective basis about each item measurement. As a result of having measured for four months, output measurement within ${\pm}2%$, and measured laser alignment, field size, SSD indicator in range within ${\pm}1mm$. Conclusion : We can enforce output measurement and appliances check conveniently, and time was reduced and was able to raise efficiency of business. We were able to bring a cost reduction by substitution expensive commercialized equipment. Further It is necessary to makes a product as strong and slight materials, and improve convenience of use.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.12 no.2
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• pp.111-122
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• 2002

Malicious attackers generally attempt to intrude the target systems by taking advantage of existing system vulnerabilities and executing readily available code designed to exploit blown vulnerabilities. To the network security administrators, the rat and minimal step in providing adequate network security is to identify existing system vulnerabilities and patch them as soon as possible. Network-based vulnerability analysis scanners (NVAS), although widely used by network security engineers, have shortcomings in that they depend on limited information that is available and generally do not have access to hast-specific information. Host-based vulnerability analysis scanner (HVAS) can serve as an effective complement to NVAS. However, implementations of HVAS differ from one platform to another and from one version to another. Therefore, to security engineers who often have to maintain a large number of heterogeneous network of hosts, it is impractical to develop and manage a large number of HVAS. In this paper, we propose an agent-based architecture named ISMAEL and describe its prototype implementation. Manager process provides various agent processes with descriptiom on vulnerabilities to check, and an agent process automatically generates, compiles, and executes an Java code to determine if the target system is vulnerable or not. The result is sent back to the manager process, and data exchange occurs in % format. Such architecture provides maximal portability when managing a group of heterogeneous hosts and vulnerability database needs to be kept current because the manager process need not be modified, and much of agent process remains unchanged. We have applied the prototype implementation of ISMAEL and found it to be effective.

• Journal of Information Technology Services
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• v.11 no.2
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• pp.213-228
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• 2012

The construction of the Geographical Information System(GIS) is continuously in progress, and with the diversification and complication of the system, the importance of its audit is further deepened. At this point in time, the information system audit has been obligatory as it has been stipulated in law, and the GIS audit has come to follow the criterion of the information system audit since it belongs to the information system audit category. However, it was found that there was a difference between the current information system audit standard and the former GIS audit standard, and the audit checking items for the efficient GIS audit is necessary. For this reason, this paper surveyed the characteristics of GIS in accordance with this necessity, analyzed the GIS audit checking items found in the audit performance guideline of the GIS audit standard, and studied the GIS development methodology through the related literature. In addition, this paper also elicited and proposed the audit checking items for the efficient GIS audit based on the findings of this paper. Finally, this paper confirmed the efficiency of the GIS audit checking items proposed here through the comparison of the actual cases of GIS audits.

• The Journal of the Korea Contents Association
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• v.5 no.2
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• pp.107-114
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• 2005

This paper proposes to analyze a security level about information property systems. This method uses objective and quantitative risk level assessment. The method analyzes administrative, physical and technical aspects of information property system commonly. This method also uses administrative, physical and technical weights. Individually according to requirements security assessment purpose. And it shows risks weighting mean and importance of information property by graph. The most right and up systems in maps is prior to other systems. Also, Quantitative analysis presents more objective and efficient results for security level assessment of information system.

• 한국신재생에너지학회:학술대회논문집
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• 2009.11a
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• pp.302-302
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• 2009

미국 DOE(Department of energy) 산하 EERE(the office of energy efficiency and renewable energy)에서는 시행되고 있는 일반 프로그램 평가(General Program Evaluation) 중 하나인 과정 평가(Process Evaluation)는 프로그램의 수행의 효율성과 유효성을 평가하기 위해 수행된다. EERE에서는 프로그램 별로 매 2~3년에 한번, 프로그램의 진행에 장애요인을 시행하기 위해 부정기적으로 과정평가를 수행하여 프로그램의 진행과정을 개선할 것을 제안하고 있다. 과정평가의 방법론으로는 사례연구(case study), 내용분석(content analysis), 메타평가(meta evaluation), 델파이분석(delphi-analysis), 외부 동료평가(peer review) 등의 방법론이 사용될 수 있다. 특히, EERE는 "Peer Review Guide(2004)"을 발간하여 과정평가에서 있어 외부 동료평가의 방법론을 정리하였다. 과정평가를 통해 프로그램 수행결과의 중간점검과 동시에 프로그램의 발전을 위하 전문가의 제언을 수집할 수 있다. 따라서 과정평가의 결과는 프로그램의 개선에 도움을 줄 수 있으며, 장기 과제인 경우 프로그램 관리에 효과적으로 사용될 수 있다. 우리나라의 경우, 사업 수행 시 '진도보고'나 '중간결과 발표' 등을 통하여 동일한 내용의 평가를 시행하고 있으나, 평가의 항목.시기.예산 등에 대한 지침(guideline)이 구축되었다고 볼 수 없는 상황이다. 한국의 신재생에너지 보급사업은 국가적인 중요도, 투입예산의 규모 및 수행기간 등을 고려할 때 과정평가를 통해 정기적으로 사업의 진행과정을 점검할 필요가 있다 하겠다. 따라서 신재생에너지 분야의 사업의 관리에 적용될 수 있는 EERE의 과정평가를 한국의 상황에 맞게 수정하고 이를 정규적으로 시행하는 방안에 대한 논의가 필요하다 하겠다.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.617-620
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• 2006

개방화시대에 제품의 국제경쟁력을 확보하기 위해서는 Unix나 Tandem 환경의 시스템운영관리 측면에서 실시간 모니터링 운영의 효율성이 증대 하고 있고 이를 바탕으로 서비스의 품질 및 기술력 향상과 고객만족 서비스 등 경제성이 필수적으로 요구되고 있다. 기존의 시스템관리 기능의 운영측면에서 보다는 보다 더 다양한 고객의 요구가 반영이 가능한 새로운 형태의 실시간 업무지원이 가능한 모니터링 시스템 개발이 필요한 시점이다. 기존의 시스템관리 기능에서 보다 업무지원이 기능이 강하된 모니터링 툴 이다. 즉 업무(Application) 프로세스의 장애현상에 따른 무응답을 사전 감시하고 System의 자원사용현황을 개발 및 운영자 위주의 실시간으로 감시환경 모니터링 서비스 제공이 가능한 기능으로 설계 따라서 시스템관리에서 보다 안정적인 운영을 제공 할 수 있다. 본 연구에서는 업무 프로세스의 장애를 점검할 수 있는 모니터링 툴 검토하여 실무자를 통하여 업무장애 유형에 따른 감시항목 및 의견 수렴, 요건정의에 따른 업무설명회 수행, 탠덤 시스템 모니터링 프로젝트 수행 필요한 기능을 개발 할 것이다. 또한 시스템 운영자 입장에서 실시간 모니터링 서비스를 통하여 업무(Application)프로그램의 전송지연 및 장애 원인을 한눈에 파악 점검 하도록 하며 각 기능별 시스템(System)별 장애 감시 통하여 사용자에서 현재 상태를 종합음성경보(SMS) 구축 연계하여 지원한다. 따라서, 본 논문에서는 중요한 요소로 기존의 많은 Unix나 Tandem 환경의 시스템관리 기능을 비교 분석을 통하여 보다 효율성이 높은 고객서비스 기능과 업무지원이 가능한 실시간 시스템관리 모니터링 툴을 개발 한다.

• Journal of Information Technology Services
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• v.11 no.4
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• pp.107-121
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• 2012

The core infra-technology in the ubiquitous era, RFID which has taken action from the public institution with the pilot projects as well as the practical projects is gradually extending its spectrum to the private enterprises. Along with its expansion, the audit required on the RFID-based information system is also growing in the industry. Especially, since RFID-based information systems, especially compared to other information systems, are likely to be exposed to many threats, the security audit for them is being emphasized. This paper suggests security audit checking items for the RFID-based information system, which can be used to perform the efficient security audit. The security audit checking items consist of eight basic checking items, each of which consists of detailed review items and can be applied for each building steps of the system(analysis, design, implementation, testing, and development). Finally, this paper confirmed the efficiency of the security audit checking items proposed in this paper through survey by the experienced auditors and analysis of practical audit cases.

• Korean Journal of Construction Engineering and Management
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• v.15 no.1
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• pp.62-69
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• 2014

Since a government policy greatly affects markets and firms, an evaluation on government's policies is recognized as a critical issue. In Korea, two major policy plans on CM(Construction Management) include the Construction Industry Promotion Plan and the Construction Technology Promotion Plan from which Government's CM policies can be understood. The objective of the study is to analyze and discuss CM firm's perception and evaluation toward the Government's CM policies of the two plans based on the Gap analysis. The paper identified that the CM firms perceive that the Government's CM policies properly deal with key issues of the industry. However, they evaluate that the execution of the policies has been overall under-performed. As a way forward, the Government needs to improve on the execution plan and performance measurement rather than to develop new policy agenda.

• Journal of the Korean Data and Information Science Society
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• v.24 no.6
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• pp.1189-1197
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• 2013

Data mining is the process of analyzing a huge database from different perspectives and summarizing it into useful information. One of the well-studied problems in data mining is association rule generation. Association rule mining finds the relationship among several items in massive volume database using the interestingness measures such as support, confidence, lift, etc. Typical applications for this technique include retail market basket analysis, item recommendation systems, cross-selling, customer relationship management, etc. But these interestingness measures cannot be used to establish a causality relationship between antecedent and consequent item sets. This paper propose causal association thresholds to compensate for this problem, and then check the three conditions of interestingness measures. The comparative studies with basic and causal association thresholds are shown by numerical example. The results show that causal association thresholds are better than basic association thresholds.