• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.697-700
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• 2015

스마트디바이스의 확산으로 그에 따른 보안에 대한 중요성이 커지고 있다. 스마트디바이스의 정보를 보안하기 위해서는 소스코드에서 암호화가 필요하다. 하지만 모든 애플리케이션이 암호화가 돼있는 것은 아니다. 스마트디바이스의 구조를 모르는 사용자는 애플리케이션이 안전한지 모르기 때문에 정보가 암호화 돼있지 않는 애플리케이션을 사용할 경우 개인정보가 유출될 가능성이 농후하다. 따라서 이를 사용자에게 인지시켜주기 위해 암호화과정에 따른 암호화 복잡도를 체크할 수 있는 분석 툴을 개발하였다. 이 개발 툴은 오픈소스 기반인 와이어샤크와 카인과 아벨을 이용한 이차분석 툴로 사용자에게 해당 애플리케이션이 개인정보유출의 위험성을 제안한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.5
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• pp.1159-1168
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• 2012

Control Flow Integrity(CFI) and Control Flow Locking(CFL) prevent unintended execution of software and provide integrity in control flow. Attackers, however, can still hijack program controls since CFI and CFL does not support fine-granularity, context-sensitive protection. In this paper, we propose a new CFI scheme, Source-code CFI(SCFI), to overcome the problems. SCFI provides context-sensitive locking for control flow. Thus, the proposed approach protects software against the attacks on the previous CFI and CFL schemes and improves safety.

• Journal of agricultural medicine and community health
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• v.46 no.2
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• pp.78-88
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• 2021

Objectives: This study aimed to investigate health risk awareness pertaining to fine dust exposure and the use of face masks in farmers, as well as their attitude toward education regarding fine dust-related respiratory disease prevention. Methods: In total, 295 farmers were interviewed in a survey using a structured questionnaire to obtain data on general characteristics, farming-related characteristics, health risk awareness pertaining to fine dust exposure, attitude toward education on fine dust-related respiratory disease prevention and the use of face masks. This study was analyzed the correlation between the perceived susceptibility to fine dust exposure and willingness to participate in education on fine dust-related respiratory disease prevention. Results: The mean score for perceived susceptibility to fine dust exposure was 3.8 (out of 5), and the participants were highly willing to receive education on fine dust-related respiratory disease prevention. In Multiple response analysis of reactions to exposure to fine dust generated during work, 221 participants responded that they practiced at least one preventive action; participants gave a positive response to "wearing masks" (56.1%), "personal hygiene, such as hand washing." (52.9%). In terms of education methods, 94 (33.6%) participants preferred to learn online or via text messages. Conclusions: The significant correlation between the perceived susceptibility to fine dust exposure and willingness to participate in education on fine dust-related respiratory disease prevention shows the importance of promoting education on prevention. The results of this study can help understand as reference for education on fine dust-related respiratory disease prevention.

• Journal of The Korean Association For Science Education
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• v.38 no.5
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• pp.625-633
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• 2018

The goal of this study is to investigate the features of Korean eighth graders' achievement and its trend in Chemistry in TIMSS 2011 and TIMSS 2015, and to explore its implications for Korean science curriculum and in teaching science. With three science educators and six science teachers, we analyzed the characteristics of Korean eighth graders' achievement in Chemistry by test-curriculum matching analysis. According to the trend analysis of science topics with released items for Chemistry in TIMSS 2015, Korean students' percentage for correct answers has dropped in topics such as regularities in chemical reactions, oxidation-reduction, etc. since these topics are covered after the ninth grade in the 2009 revised curriculum. For science cognitive domains, Korean students showed weaknesses in 'applying' domain in TIMSS 2015. Based on the results, we suggested implications for improvement in middle school chemistry curriculum and how to improve science teaching and learning for students' better science competencies and real-world application of science knowledge.

• Journal of Korea Game Society
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• v.16 no.2
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• pp.129-138
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• 2016

Recently, the number of children who are required to take special care are increasing because of the fast-changing society and the environment factor. Among them, most children in poor family are leading to Children with borderline intelligence, so urgent action are needed to prevent this situation. This study is conducted to establish the reason why children with borderline intelligence are taking place. In addition, this study embodies serious game as a solution which is able to prevent and cure this children with borderline intelligence problem. This game was made to improve weak memory, concentration and judgment of children with borderline intelligence and was verified in effectiveness by thirty people and experts.

• Review of KIISC
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• v.27 no.2
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• pp.34-40
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• 2017

제어시스템(발전시설, 전력시설, 교통시설 등)은 생산성, 가용성, 안전성을 목적으로 다양한 제어기기들로 구성되며, 물리적으로 다양한 위치에 분산되어 운영되고 있다. 그리고 안전성과 가용성을 유지하기 위해 시스템 도입 시 기존 시스템에 영향을 미치지 않는지 검증을 수행 후 시스템을 도입한다. 이러한 이유로 신규 기술의 도입이나, 기기의 변경이 자유롭지 않다. 이와 같은 제어시스템의 특성으로 인해 현재 증가되고 있는 제어시스템 사이버공격에 대한 보안대책 또는 기술들의 적용이 쉽지 않아 사이버공격에 취약한 상황이다. 제어시스템은 상위 시스템의 제어 명령을 통해 하위 제어기기 또는 필드기기를 제어하는 형태로 제어 명령의 무결성 유지가 특히 중요하다. 이는 곧 제어시스템에 환경에 접근한 공격자가 인가되지 않은 장비를 제어시스템에 연결하고, 악성 제어명령을 전송하게 된다면 제어기기는 이를 인지하지 못하고 정지되거나 오작동을 유발 할 수 있다는 것을 의미한다. 본 논문에서는 제어시스템 내 제어명령의 무결성 유지를 위해 임베디드 Add-on 단말을 통해 OTP 값을 생성, 전달, 검증하는 방안을 제안한다. 해당 방안은 상위노드와 하위노드 사이에 Add-on 장치를 두어 상위노드에서 제어명령 발생 시, 제어명령에 OTP값을 통해 캡슐화하고 하위노드로 전달한다. Add-on 장비는 일반 IT시스템과 상이한 제어시스템의 특성에 맞게 고안되었으며 제어시스템 내에 발생되는 제어명령 위변조, 제어명령 재사용 공격 등을 차단 할 수 있다.

• Korean Public Health Research
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• v.44 no.4
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• pp.25-34
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• 2018

Objective : This study aimed to examine the association Self-Rated Health(hereafter SRH) and Activities of Daily Living(hereafter ADL), Independent Activities of Daily Living(hereafter IADL) among Korean elderly. Methods : Using nationally representative cross sectional studies called 2014 Survey of living conditions and welfare needs of Korean elder persons. We used SRH as an independent variable, disabilities of ADL and IADL as dependent variables. Logistic regression was implemented and potential confounders such as socio-economic status, demographic characteristics and others were adjusted. Results : It was revealed that people who were female(than male) and 75 or more years old(than less than 75 years old) were shown to have poor SRH and disabilities of both ADL and IADL. In logistic regression model, poor SRH was associated with ADL and IADL disabilities. Especially, their association was more remarkable among male than among female. It can be understood that socio-economic contexts affect quality of life among elderly and SRH can be differently perceived by gender. Conclusions : Our notable findings showed that gender perspective is needed to understand SRH and daily living among elderly.

• KDI북한경제리뷰
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• v.21 no.10
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• pp.3-28
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• 2019

사회적기업, 협동조합, 소셜벤처 등 사회적경제의 부상으로 이들이 전체 경제에서 차지하는 비중이 커지고 있어 북한, 통일 관련 연구에서도 접목이 필요하다. 사회적경제는 북한·통일 문제와 어떤 연관이 있는지에 대해 통일정책과 통일 역량 강화의 측면에서 나누어 고찰했다. 전자에 포괄되는 주제로는 통일국가의 미래상, 북한경제의 유사성 및 변화가 있다. 후자와 관련되는 주제로는 남북교류협력, 북한이탈주민정책, 통일교육에 대한 함의를 다뤘다. 통일국가의 미래상과 관련하여 사회적경제는 통일경제의 부작용에 대한 완충기제로 작동할 수 있을 것으로 예상된다. 사회적경제는 자본주의의 발전에 따라 제기되는 사회적 문제를 해결하고자 하는 보완적 성격의 경제활동으로 이해된다. 따라서 향후 자유시장경제 방식의 통일이 진행되는 경우, 남한 자본주의의 문제점이 전 한반도로 확산되는 부작용에 대한 대안적 해결방안으로 작동할 수 있을 것으로 기대된다. 사회적경제가 북한경제, 나아가 사회주의 경제와 유사성이 있는지에 대해서는 논란이 있다. 향후 이에 대한 연구 성과에 따라 북한경제의 변화를 추동하는 동력으로서 사회적경제의 영향력을 가늠할 수 있을 것이다. 남북교류협력과 관련해서는 우선, 교류협력이 재개되는 경우 사회적경제기업의 참여를 어떻게 추동하고 지원할 것인지에 대한 대안을 내놓을 필요가 있다. 일반 기업 또한 사회적경제 관점을 활용해 북한 진출에 나설 수 있을 것으로 예상할 수 있고, 이 때 중요한 사회적경제의 키워드는 BOP 시장이다. 사회적경제는 북한이탈주민을 취약계층으로 자리매김하고 있는데, 향후에는 적극적으로 사회적경제의 창업의 주체로 육성할 필요성이 있다는 점도 제기하였다. 통일교육과 관련해서는 대상, 주체, 내용과 관련한 시론적 차원의 접근을 정리하였다. 사회적경제의 부상이 북한학 연구에 미치는 영향에 대해서는 더 많은 새로운 상상력의 발휘가 요구된다.

• Journal of agricultural medicine and community health
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• v.29 no.1
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• pp.121-131
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• 2004

Objectives: This study was conducted to understand the status of influenza vaccination in some rural communities and to apply the results to formulate a counterplan for influenza prevention. Methods: The authors conducted a questionnaire survey from May 26 to May 29, 2003 among the residents in two rural communities: 602 people at the village Gigye-myeon and 965 at the village Cheongsong-gun. For statistical analysis the chi-square test and chi-square for trend method were used. Significance was set a p<0.05. Results: The study group contained 722 (46.1%) males and 845 (53.9%) females. In response to the question 'Influenza vaccination must be taken every year', 845 people (86.0%) replied 'Yes'. In response to the question 'Influenza vaccination can prevent cold', 224 people (20.8%) replied 'No'. The rate of influenza vaccination increased every year from 2000 to 2002 (p<0.05) and was lower for those under sixty-four than for those over sixty-five. In response to the question 'Plan to receive influenza vaccination in 2003', 531 people (52.8%) responded they will have influenza vaccination. Conclusions: Many people had a wrong perception about influenza vaccination. Therefore, their wrong perception must be corrected by a publicity campaign. The rate of influenza vaccination for those from over fifty to under sixty-four should be increased by public policy because they are as susceptible to influenza as those over sixty-five. This study produced meaningful results from the investigation into the status of influenza vaccination for the residents in rural communities and these findings can be utilized in the formulation of future influenza vaccination policy.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.6
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• pp.1157-1167
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• 2013

The development of electronic devices has recently led to many problems such as personal information rape and leakage of business information. Conventional loud-speakers have been generally used to output devices. It can be, however, operated as a micro-phone which was abused as a means for eavesdropping since the speaker and microphone have basically the equivalent structure. Most importantly, the general peoples are not aware of the approaching danger about using speaker as microphone. And, traditional eavesdropping detection equipment does not check the attack. In this paper, we demonstrate that there is a serious danger and vulnerability in using loud-speakers since they can be used as eavesdropping devices.