• Journal of Korean Society of Disaster and Security
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• v.10 no.1
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• pp.11-17
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• 2017

The case study on ground subsidence was conducted and the cause of ground subsidence was evaluated, main cause were insufficient site exploration, inaccurate strength parameters, defective temporary wall, insufficient reaction for boiling and heaving, excessive excavation and so on. Risk factors during excavation were identified from the cause of ground subsidence and risk factors were site exploration, selecting excavation method, structure analysis, measurement plan, excavation method construction, underground water level change, natural disaster and construction management. The survey of the experts on risk factors identified was conducted to evaluate the importance of risk factors, and confidence analysis was performed to evaluate the significance level between survey result and survey respondent using Chi-square Test.

• Journal of the Korean Society for Railway
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• v.14 no.5
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• pp.416-424
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• 2011

The recent development of USN (Ubiquitous Sensor Network) technology has broadened its applications to many fields of industry. The USN technology enables the system to monitor and control the status of distributed sensor nodes based on the low-powered communications. Applying the USN in the train control domain, the operational efficiency can be enhanced, where the reliability and the safety of the system are the key challenges. This paper suggests the system design for evaluating and improving the reliability and safety of the gateway, which is a USN component that manages the radio network among the sensors and collects the information from them. For this purpose, the reliability and the level of safety integrity of a general gateway have been predicted quantitatively and the supplementary design has been proposed for the selected week points. The verification on the reliability and the safety of the improved gateway according to the related standards has been followed. With the results of the study, the applicability of USN gateway for train control systems has been reviewed.

• Fire Science and Engineering
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• v.34 no.4
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• pp.96-100
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• 2020

The leakage of hazardous materials due to the defect in storage tank foundations is likely to cause tremendous fire disasters in the industry cluster area. Thus, adequate design and construction of the tank foundation is required for preventing tank leakage. In this study, four types of typical tank foundations were classified and modeled for 3D FEM analysis to perform stability evaluation on tank foundations. Furthermore, numerical analysis indicated that stress concentration just below the tank shells is 40 times that at the tank center. The settlement influence zone is about the tank radius and tank diameter in the horizontal and vertical directions, respectively. Thus, the appropriate guidelines for the design and construction of tank foundations were suggested via a comparison assessment of the numerical analysis results on the stress distribution and displacement of the tank foundations.

• The KIPS Transactions:PartD
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• v.15D no.4
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• pp.495-504
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• 2008

Aspect Oriented Programming(AOP) is a relatively new programming paradigm and has properties that other programming paradigms don't have. This new programming paradigm provides new modularization of software systems by cross-cutting concerns. In this paper, we propose a regression test method for program evolution by AOP. By using JoinPoint, we can catch a pointcut-name which makes it possible to test the incorrect pointcut strength fault and the incorrect aspect precedence fault. Through extending proof rules to aspect, we can recognize failures to establish expected postconditions faults. We can also trace variables using set() and get() pointcut and test failures to preserve state invariant fault. Using control flow graph, we can test incorrect changes in control dependencies faults. In order to show the correctness of our proposed method, channel management system is implemented and tested by using proposed methods.

• Korean Journal of Clinical Pharmacy
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• v.23 no.1
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• pp.1-13
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• 2013

희귀질환이란 일반적으로 그 유병율이 인구 일만 명당 5명 이하인 질환을 말한다. 세계에는 약 7,000여종의 희귀질환이 알려져 있고 학술지에 매 주 대략 5종의 새로운 희귀질환이 보고되고 있다. 희귀 의약품(orphan drug)이란 희귀질환치료제 또는 수익성이 없어 개발을 기피하는 일반질환 치료제로서 정부가 지정한 의약품을 말한다. Orphan 의약품의 개발에는 많은 장점이 있다. Orphan 의약품으로 정부의 지정을 받으면 세금감면을 통한 연구비 지원, 임상시험 비용 지원, 신약허가 심사비 면제, 시장독점권 부여 등의 특혜가 주어진다. 희귀질환의 대부분은 단순한 유전적 결함에 의하는 경우가 많아 치료제의 표적발견이 비교적 쉬우므로 개발 성공률이 높고, 임상시험기간이 짧으며, 시판허가를 받을 확률이 높아 연구개발비용이 적게 든다. 그 결과 전세계 orphan 의약품 시장은 최근 매년 6%씩 성장하여 2014년에는 약 1,120억달러의 시장을 형성할 것으로 추정된다. Orphan 의약품 시장은 현재 매년 8.9%씩 성장하고 글로벌 시장의 51%를 점유하는 미국을 중심으로 확장되어 가고 있으며, 총매출액의 64.3%가 유전자재조합의약품에 의한 것으로 알려져 있다. 이러한 의약품시장의 변화와 사회적 요구에 부응하여 한국 또한 희귀질환 치료제 개발의 활성화를 위해 재정적 지원체계를 구축하고, 허가관리를 개선하며, 법률적 제도를 완비하는 과정에 있다. 현재 희귀질환의 치료적 타겟을 찾아 신물질이나 기존의 약물을 발굴하는 과정이 주로 대학이나 연구 중심 병원에서 이루어지고 있다. 제도가 잘 정립되어 있는 미국 시장을 겨낭하여 orphan 의약품 개발을 전략적으로 수행한다면 큰 성공을 거둘 수 있을 것으로 기대된다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.12
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• pp.2287-2297
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• 2007

The proposed ANIDS(Advanced Network Intrusion Detection System) which is network-based IDS using Association Rule Mining, collects the packets on the network, analyze the associations of the packets, generates the pattern graph by using the highly associated packets using Association Rule Mining, and detects the intrusion by using the generated pattern graph. ANIDS consists of PMM(Packet Management Module) collecting and managing packets, PGGM(Pattern Graph Generate Module) generating pattern graphs, and IDM(Intrusion Detection Module) detecting intrusions. Specially, PGGM finds the candidate packets of Association Rule large than $Sup_{min}$ using Apriori algorithm, measures the Confidence of Association Rule, and generates pattern graph of association rules large than $Conf_{min}$. ANIDS reduces the false positive by using pattern graph even before finalizing the new pattern graph, the pattern graph which is being generated is compared with the existing one stored in DB. If they are the same, we can estimate it is an intrusion. Therefore, this paper can reduce the speed of intrusion detection and the false positive and increase the detection ratio of intrusion.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.15 no.1
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• pp.89-93
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• 2019

Preterm infants have higher possibility of undergoing endotracheal intubation after birth than normal children due to medical conditions. Developmental disturbances of primary incisors following intubation can occur as crown malformation, enamel defects, delayed eruption, displacement of dental follicle in crypt, groove formation of palate or alveolar ridge, acquired cleft palate, and dental arch distortion. This clinical report presents the effect of intubation on primary dentition of preterm infants. A 2-year-old girl with cerebral palsy and premature birth history visited our clinic with chief complaint of unerupted primary upper incisor. A 1-year-old boy with cerebral palsy, status epilepticus and premature birth history visited our clinic due to crown malformation. Developmental disturbances of primary incisors in these cases were not related to the patients' systemic disease, and there were no history of dental trauma. A long term endotracheal intubation prior to tooth eruption might have caused local trauma on alveolar ridge. It is very important to monitor dental problems of preterm infants who had experienced endotracheal intubation during neonatal period. Due to influences on both primary and permanent teeth, periodic re-evaluation of affected areas and establishment of comprehensive treatment plans are necessary.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.14 no.3
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• pp.3-12
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• 2004

Secure operating system is a special operating system that integrates some security functions(i.e. access control, user authentication, audit-trail and etc.) with normal operating system in order to protect system from various attacks. But it doesn't consider my security of network traffic. To guarantee the security of the whole system, network traffic must be protected by a certain way and IPsec is a representative technology for network security. However, it requires administrator's carefulness in managing security policies and the key management mechanism is very heavy as well as complicated. Moreover, it doesn't have a suitable framework for delivery of security information for access control mechanism. So we propose a simple trusted channel mechanism for secure communication between secure operating systems. It provides confidentiality md authentication for network traffic and ability to deliver security information. It is implemented at the kernellevel of IP layer and the simplicity of the mechanism can minimize the overhead of trusted channel processing.

• Journal of the Korea Society for Simulation
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• v.30 no.1
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• pp.127-137
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• 2021

The method of utilizing the strain and vibration values of rails is primarily used to diagnose the condition of wheels and railroad facilities. The dynamic load is measured under the assumption that the strain of the rail and the load of the railroad vehicle are proportional. Wheel condition is measured under the assumption that the magnitude of the defect and the magnitude of the rail vibration are proportional. However, environmental factors affecting the strain and vibration of the rail such as vehicle speed, wheel load, climate, and track conditions are not reflected, many errors occur depending on the measurement conditions. In this study, the effect of track distortion, which is a major indicator of the track condition among the environmental factors that affect the strain and vibration of the rail, on the strain and vibration of the rail, was examined through dynamic simulation. As a measure to reduce the measurement deviation, the effect of securing additional measurement points was analyzed.

• Land and Housing Review
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• v.14 no.1
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• pp.99-114
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• 2023

This study was conducted to review the adequacy and applicability of the safety certification system for educational facilities which was implemented in 2021 and to derive possible improvements to the existing certification system. This study analyzed the existing certification system, examined similar systems from abroad, conducted interviews with certification experts, and presented the proposed improved system to experts for review and advice. The proposed model replaced the current certification process with three stages of follow-up management. This allows for problems that may occur in the evaluation process and the composition of evaluators to be prevented by applying a feedback system. In the review stage of the newly proposed certification system, certification experts recommended specifying the detailed standards of certification performance such as criteria for selecting examiners and arbitrators. They concluded that there were no fatal flaws in the overall structure of the evaluation system. According to the results of this review, the proposed evaluation system was proven to be an effective improvement to the existing system.