• Journal of Korean Society of Transportation
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• v.25 no.5
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• pp.57-66
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• 2007

This study deals with the rear-end accidents of 4-legged signalized intersections in Cheongju. The objectives are to analyze the characteristics of the accidents and to develop the models which explain the relations among the accidents, traffic volumes and geometric structures. In pursuing the above, the study uses the data 308 rear-end accidents occurred at the 106 intersections (2004). The main results analyzed are as follows. First, the rear-end accidents were analyzed to be serious. because the ratio of severe accidents is 77.6%. Second, the more accidents were occurred of in the night than the daytime and in the approaching sections of intersections. In particular, the accidents of large-size struck vehicles were analyzed to be more serious. Finally, the multiple and Poission regression models developed in this study are all analyzed to be statistically significant.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.751-758
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• 2021

Munitions must be analyzed to identify any risks for quality assurance in development and mass production. Risk identification for parts, compositions, and systems is carried out through failure mode effects analysis (FMEA) as one of the most reliable methods. FMEA is a design tool for the failure mode of risk identification and relies on the RPN (risk priority number). FMEA has disadvantages because its severity, occurrence, and detectability are rated at the same level. Fuzzy FMEA applies fuzzy logic to compensate for the shortcomings of FMEA. The fuzzy logic of Fuzzy FMEA is to express uncertainties about the phenomenon and provides quantitative values. In this paper, Fuzzy FMEA is applied to the failure mode of a rotorcraft landing system. The Fuzzy rule and membership functions were conducted in the Fuzzy model to study the RPN in the failure mode of a landing system. This method was selected to demonstrate crisp values of severity, occurrence, and detectability. In addition, the RPN was obtained. The results of Fuzzy FMEA for the landing system were analyzed for the RPN and ranking by fuzzy logic. Finally, Fuzzy FMEA confirmed that it could use the data in quality assurance activities for rotorcraft.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.32 no.5
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• pp.1009-1017
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• 2022

Log data has been used as a basis in understanding and deciding the main functions and state of information systems. It has also been used as an important input for the various applications in cybersecurity. It is an essential part to get necessary information from log data, to make a decision with the information, and to take a suitable countermeasure according to the information for protecting and operating systems in stability and reliability, but due to the explosive increase of various types and amounts of log, it is quite challenging to effectively and efficiently deal with the problem using existing tools. Therefore, this study has suggested a multiclass classification of the security severity level of multi-source event log using machine learning based on natural language processing. The experimental results with the training and test samples of 472,972 show that our approach has archived the accuracy of 99.59%.

• Korean Journal of School Psychology
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• v.8 no.3
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• pp.263-285
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• 2011

The present study was designed to evaluate the effects of staff training in PBS on the behaviors of staff and children with developmental disabilities in an inpatient unit. The perceived significance of children's problem behavior and staff's caring stress significantly decreased with the intervention. A satisfaction survey reported staff's high satisfaction with the process and results of staff training. This study suggests that PBS is a socially valid and positive intervention with problem behavior of children with developmental disabilities. The implications and limitations of this study, with directions for future research, are also discussed.

• Pediatric Infection and Vaccine
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• v.10 no.2
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• pp.215-222
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• 2003

Purpose : This study was to analyze serious bacterial infections in infants younger than three months of age and to review the direction of treatments for these patients. Methods : 378 febrile infants with a rectal temperature ${\geq}38.0^{\circ}C$ visited from Jan. 2001 through Dec. 2002 were retrospectively studied. Infants with the following criteria belonged to the low risk group. WBC $5,000{\sim}15,000/mm^3$, WBC negative in urine stick test and negative for nitirite test, CSF WBC < $10/mm^3$ and negative in CSF gram stain, negative chest X-ray, stool WBC <5/HFP(high power field), and focal infection. If any of the above criteria were not met, they belonged to the high risk group. SBI was defined as a positive culture of urine, blood or CSF. SI was defined as aseptic meningitis or pneumonia including above laboratory tests of SBI. SBI patients were separately compared with two groups, high risk and low risk. Results : Of the 378 infants that were tested 216(57.1%) were in the high risk group and 162(42.9%) in the low risk group. Among 105 SBI(27.8%) and 172 SI(45.5%), there were 98 urinary tract infection(25.2%), 10 bacteremia(2.6%), 2 bacterial meningitis(0.6%), and 77 aseptic meningitis(22.8%). There were 76 SBI(35.2%) from the high risk group and 29 SBI(17.9%) from the low risk group identified. The results of the sensitivity(72.4%), the specificity(48.7%), the negative predictive value(82.1%) and the positive predictive value (35.2%) were calculated. Conclusion : Even though the probability of SBI in the low risk group is insignificant, it should still be considered in febrile infants younger than 3 months of age. I believe the CSF study is necessary because of the moderate high incidence of abnormal finding in our study.

• 월간 한농연
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• s.73
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• pp.14-19
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• 2008

수입개방화의 가속화 속에서 우리나라의 농산물이 가격경쟁력을 갖추기 위해 농산물 유통단계의 거품 제거에 대한 요구가 거세지고 있다. 이런 가운데 얼마 전 농수산물유통고사(aT)에서 발표한 '2007년 주요 농산물 유통실태 조사 결과 분석' 보고서에 따르면 우리나라의 농산물 유통구조가 얼마냐 심각한 문제를 갖고 있는지 나타내고 있어 이번 호에서는 이를 바탕으로 우리나라 농축산물 유통구조의 문제점에 대해 다루어보려 한다.

• Proceedings of the Korea Technology Innovation Society Conference
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• 1999.05a
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• pp.365-380
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• 1999

현재 이공계 고급인력의 경력이동은 매우 기형적인 패턴이다. 연구인력과 연구시설의 불균형이 심각하다. 본 연구는 고급인력의 경력이동과 관련된 문제점과 그에 따른 연구여건의 변화의 실태를 분석했다. 실태분석에 나타난 결과를 바탕으로 고급인력의 유동성을 국가적으로 최적화할 수 있는 정책방향을 틀을 제시하였다.

• The monthly packaging world
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• s.4
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• pp.71-88
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• 1993

포장폐기물, 특히 플라스틱으로 인한 지구환경 오염이 심각한 문제로 인식됨에 따라 관련 업체에서는 환경적응형의 분해성 수지 개발에 몰두하고 있다. 그 결과 일정한 성과를 거두기도 했지만 아직 상업성이라든가 완전한 분해성, 분해기간, 각종 물성면에서 보다 연구개발해야 할 여지가 많은 것으로 사려된다. 본지에서는 최근에 분해성 수지를 개발했거나 취급하고 있는 업체들의 자사 개발 제품에 대한 관련 글을 실음으로써 분해성 수지 개발의 전반적 현황을 이해하는데 도

• The Science & Technology
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• v.30 no.2 s.333
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• pp.23-23
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• 1997

요즈음 자동차가 많이 늘어나 생활이 편리해졌지만 교통체증, 주차문제말고도 심각한 대기오염으로 우리의 건강을 위협하고 있다. 우리가 추구하는 과학기술의 연구가 자연환경을 크게 오염시키는 결과를 초래한다면 이 연구를 거부할만한 양식을 가져야 하고 만약 그 연구를 계속해야 한다면 환경오염 처리방법도 함께 연구해야 할 것이다.

• 식품문화 한맛한얼
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• v.3 no.4
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• pp.406-409
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• 2010

우리나라 의료보험 통계 결과 병원을 가장 많이 이용하는 질환 1순위는 바로 감기이다. 감기는 인류와 함께 진화되어 왔다고 해도 과언이 아닐 정도로 인간을 괴롭혀 온 가장 흔한 질환이지만, 뛰어난 현대의학으로도 정복하지 못하고 있는 가장 골치 아픈 문제이다. 자칫하면 폐렴, 중이염, 축농증, 기관지염 등 심각한 합병증이나 후유증을 유발할 수 있어서 예로부터 감기를 '만병의 근원'이라고 한다.