• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.29 no.6
• /
• pp.1425-1435
• /
• 2019

The expanded application of digital controls has raised the issue of cyber security for nuclear facilities. To cope with this, the cyber security technical standard RS-015 for Korean nuclear facilities requires nuclear system developers to apply security functions, analyze known vulnerabilities, and test and evaluate security functions. This requires the development of procedures and methods for testing the suitability of security functions in accordance with the nuclear cyber security technical standards. This study derived the security requirements required at the device level by classifying the details of the technical, operational and administrative security controls of RS-015 and developed procedures and methods to test whether the security functions implemented in the device meet the security requirements. This paper describes the process for developing security function compliance test procedures and methods and presents the developed test cases.

• Land and Housing Review
• /
• v.12 no.2
• /
• pp.13-32
• /
• 2021

Rapid urbanization has resulted in the unprecedented growth of population in Metro Manila, the Philippines and has led to a 'dual' housing crisis - vacant/unoccupied socialized housing and a chronic housing shortage or delayed housing supply. By developing two GIS-based statistical models, this study is to examine socialized housing in comparison with private housing with respect to location patterns, integration, accessibility, social and economic aspects, and vulnerability to environmental hazards. Multiple regression analysis was integrated with the GIS to identify significant variables that influence the spatial distribution of socialized housing. The comparison between the two regression models has shown that socialized housing is located in areas with inappropriate land use and poor accessibility to transportation facilities and built urban resources. Moreover, both regression models have proven the statistical significance of the vulnerability of socialized housing to environmental hazards. The finding explains how the current housing policies do not address the country's housing crisis, especially for the marginalized and low-income households. Thus, the findings provide implications for urban planners and local decision-makers in reforming the current policy interventions.

• Korean Journal of Culture and Social Issue
• /
• v.16 no.1
• /
• pp.1-18
• /
• 2010

This study examines the characteristics of traffic accidents involving elderly pedestrians by analyzing relevant data vis-à-vis fatal pedestrian accidents and proposes solutions to reduce such accidents. We analyzed 3,853 cases of fatal accidents involving elderly pedestrians and 1,786 cases involving younger pedestrian (these cases reflect accidents that occurred from 2005 to 2008). The results show that accidents involving the elderly occur more frequently in rural areas than urban areas, especially in autumn; this condition applies even in situations where the elderly exhibit compensation behaviors such as walking on safer roads. We found that elderly pedestrians exhibit a defective behavior in crossing roads, especially in complicated road conditions where intersections and turning/reversing vehicles represent a menacing threat. These characteristics could be explained by the degenerated physical/mental ability of the elderly and by psychological factors such as reduced level of self-confidence.

• Journal of The Korean Association For Science Education
• /
• v.26 no.2
• /
• pp.246-257
• /
• 2006

TIMSS (Trends in International Mathematics and Science Study) aims to produce reliable and internationally comparable indicators of student achievement. The TIMSS science achievement scale summarizes student performance on test items designed to measure a wide range of student knowledge and proficiency. This study analyzed Korean middle school students' science achievement at the advanced and high international benchmarks of the four benchmark levels of the benchmarks classified in TIMSS 2003 in light of science content areas (physics, chemistry, biology, earth science, and environmental science) and item characteristics. The average percent correct on items at the advanced benchmark by Korean students was highest in physics followed by earth science, biology, chemistry, and environmental science, whereas internationally the order was earth science, chemistry, biology, physics and lastly environmental science. Korean students performed relatively better in physics yet somewhat worse in chemistry than other top-performing countries. According to item analysis, Korean students reaching the advanced international benchmark understood some fundamentals of scientific investigation, but demonstrated weakness in written explanations of scientific principles, abstract science concept comprehension, and application of scientific concepts to solve quantitative problems. In addition, Korean students reaching the high international benchmark demonstrated relative weak conceptual understanding of ecology compared with other countries.

• Journal of Advanced Navigation Technology
• /
• v.13 no.4
• /
• pp.482-489
• /
• 2009

This paper proposes a CW(Continuous-Wave) bio-radar applying a new adaptive noise canceller based on ALE(Adaptive Line Enhancer) which can remove the Gaussian noise and system noise. Recently the research works on this CW bio-radar which can be used to detect heartbeat and respiration are advanced by the university and research facility. Although the researches describe CW bio-radar not only is vulnerable for the Gaussian noise but also has a disadvantage of decreasing the heart-rate accuracy due to the noise, the researches do not demonstrate the effective method for removing the noise component in a baseband signal. In this paper, a CW bio-radar applying the new adaptive noise canceller based on ALE which can remove the noise component is proposed. This paper compares and analyzes the performance for increasing the heart-rate accuracy according to removing the Gaussian noise and system noise in the baseband signal through the quadrature receiver which can alleviate the demodulation sensitivity to target position.

• Proceedings of the KAIS Fall Conference
• /
• 2012.05a
• /
• pp.25-29
• /
• 2012

본 연구의 목적은 농어촌지역의 음주문제 관련 상담센타, 사업장 중심의 절주 프로그램이나 치료 서비스가 취약한 형편이어서 농어촌 지역 직장인의 음주문제에 대한 대책을 마련하고자 하는데 있다. 본 연구의 대상자는 일 농어촌 지역에 거주하는 20세 이상의 남녀 직장인 530명을 대상으로 하였고, 설문에 동의하여 회수된 설문지는 512부였으며 이중 부실하게 응답한 12명의 자료를 제외한 500명의 자료를 최종 분석대상으로 하였다. 자료수집은 2007년 6월 12일부터 2007년 8월 25일까지 시행되었으며, 설문지의 내용을 이해하며 의사소통이 가능한 자에게 본 연구의 취지를 설명하고 연구에의 참여를 동의한 대상자에게 구조화된 설문지를 이용해 자료를 수집하였다. 1. 본 연구에 참여한 대상자의 음주에 대한 인식은 긍정적 인식의 평균은 2.93, 부정적 인식의 평균은 3.18로 나타났다. 2. 음주행태에서 음주경험여부는 현재 음주자가 79.7%로 가장 많았고, 비음주자 13.1%, 과거 음주자 7.2%로 나타났다. 음주빈도는 음주경험이 있는 대상자 중 '월 2-4회 마시는 경우'가 38.2%로 가장 많았고, 평소 음주량은 '소주 10잔 이상'이 34.6%로 많았으며 '소주 3잔 이상'인 경우가 전체 대상자의 92.2%를 차지하였다. 3. 대상자의 문제음주 정도 및 특성은 전체 대상자 중 CAGE를 통해 선별된 알코올 의존자(4개 문항 중 2개 이상이 그렇다고 응답하면 알코올 의존으로 규정)의 비율이 96명(25.1%)이었고, AUDIT를 통해 선별된 문제성 음주자(8점 이상)의 비율은 241명(64.8%)으로 나타났다. 4. 대상자의 음주로 인한 질병은 위장계 질환이 31.3.%로 가장 많았다. 이상의 연구결과를 종합해볼 때, 농어촌지역 직장인의 음주문제에 관한 구체적인 해결방안으로는 음주 문화에 대한 인식개선과 산업체 중심의 절주사업이 필요하며 농어촌 직장인 중 문제음주자 및 알코올 의존자의 조기발견 및 관리를 위한 알코올중독 예방 교육 및 진단 치료에 관한 교육 프로그램 개발이 필요하다.

• The Korean Journal of Applied Statistics
• /
• v.28 no.4
• /
• pp.721-739
• /
• 2015

The importance of the old age income security will increase for an aging society due to the deepening income polarization. The National Pension(NP) is a representative Social Security scheme in charge of old age income security as well as income redistribution for the insured. Studies by Kim (2002), Kim et al. (2003), and Hong (2013) have reported the possibility of unsatisfactory income redistribution of the NP. Recently Choi (2015) attributed those results to an unnoticed defect in the benefit formula. This study is a test for the unsatisfactory income redistribution of the current National Pension using early participants who have now become pensioners. The method aggregates cohorts and combines individual history data before the year 2013 and the results of the actuarial projection model of the 2013 after the year 2014. The results are divided by measures taken. The redistribution is obviously progressive by the income replacement rate; however, it is significantly regressive when measured by the net benefit theoretically as more plausible. Considering the effect of differing lifetime contribution year among income classes, the regressive redistribution will prevail more in the future pensioners.

• Information Systems Review
• /
• v.20 no.1
• /
• pp.159-177
• /
• 2018

With an extensive proliferation of information and communication technology, the volume and amount of digital information collected and utilized on the Internet have been increasing rapidly. Also on the rapid rise are side effects such as unintended breach of accumulated personal information and consequent invasion of personal privacy. Informational self-determination is rarely practiced, despite various states' legal efforts to redress data subjects' damage. Personal health information, in particular, is a subcategory of personal information where informational self-determination is hardly practiced enough. The observation is contrasted with the socio-economic inconvenience that may follow due to its sensitive nature containing individuals' physical and health conditions. This research, therefore, reviews factors of self-determination on personal health information while referring to the protection motivation theory (PMT), the long-time framework to understand personal information protection. Empirical analysis of 200 data surveyed reveals threat-appraisal (perceived vulnerability and perceived severity of threats) and coping-appraisal (perceived response effectiveness), in addition to individual levels of concern regarding provided personal health information, influence self-determination to protect personal health information. The research proposes theoretical findings and practical suggestions along with reference for future research topics.

• Korean Journal of Childcare and Education
• /
• v.10 no.5
• /
• pp.5-23
• /
• 2014

The purpose of this study was to identify factors affecting extra expenses incurred by extracurricular activities, prompted by the problem that the financial burden on households for their children's education and child-care is not showing enough signs of being mitigated, despite increased child-care subsidies from the government. Data for this study was obtained from the 4th Panel Study on Korean Children of Korea Institute of Child Care and Education. The analysis of the study shows that 68.5% of the surveyed children were participating in extracurricular activities and the average number of extracurricular activities they took part in was 2.9. The average extracurricular expenditure was 50.000 won. However, based on the findings of the survey, it was statistically significant to find that the number of extracurricular activities the children participated in and the expenditure the households spent on them varied by area. Variables were inserted in a gradual manner in identifying factors influencing households' expenditure on children's extracurricular activities. The results showed that amongst the variables used, the education level of the mother, the employment status of the mother, the type of the child-care support institution, and the household's place of residence featured prominently, with the place-of-residence factor accounting for most of the reason why a household spent the amount it did. The outcome of the study bears four policy implications: First, there is a need for a specific evaluation of the contents and costs of extracurricular activities and supervision and management of such activities. Second, it is necessary for the central government to provide a specific criteria of necessary expense. Third, throughout the child support agency, the courses and costs of special activities should be monitored regularly. Fourth, there should be extracurricular activity support for underprivileged children.

• 한국노년학
• /
• v.37 no.2
• /
• pp.329-347
• /
• 2017

The purpose of this study is to see if we can predict the health of seniors of community by analyzing the connection between social network degree and mental and physical health of old people who live in the areas of Gangwha Island. The subjects of the study were men and women aged 65 or over, a total of 643 that resided in Ganghwa A-county. The survey was conducted on Korean Social Life, Health and Aging Project from the year 2011 to 2012. Regression analysis was carried out using the data. The analysis results were as follows. First, it showed the relationships between income, gender, age out of demographic variables used as control variable and old persons'physical health. The research results showed that physical health was better in case of the higher incomes, men, and lower age. Second, out of demographic variables, educational background, income, age was shown to correlate with mental health. The research results showed that mental health was better in case of the higher incomes, higher educational background, and lower age. Third, in social network including direction, both out-degree and in-degree were shown to predict old people's physical and mental health. The results of this study suggest that not only out-degree but also in-degree should be considered in predicting the health of elderly persons by a person's human relationship. Also, two indicators of degree are meaningful in the dimension of health promotion and welfare of the old in that they can be used for finding isolated individuals that can be physically and mentally vulnerable.