• 해양환경안전학회지
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• 제26권3호
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• pp.227-232
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• 2020

This paper develops a risk index based on an indicator of risk assessment in terms of coastal activity location and accident type. The risk index is derived from a formula which adds the consequence of failure to a vulnerability value, then subtracts the mitigation value. Specifically, the consequence of failure is the number of casualties in coastal activity locations. An indicator of vulnerability refers to coastal environment elements and social elements. A pointer of mitigation includes managerial and organizational elements that indicate the capabilities of coastal activities. A risk rating of coastal activity location is found from a risk matrix consisting of the accident location and type. The purpose of this study is to prevent accidents at coastal activity locations by allowing the Coastal police guard to monitor effectively and inform visitors of potential risks.

• 환경생물
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• 제29권1호
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• pp.74-80
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• 2011

In this study we present a mammalian cell culture model that allows to study the effect of endocrine disruptors (EDCs) on aromatase activity of aquatic amphibian, Bombina orientalis. Bombina orientalis aromatase gene was subcloned into a mammalian expression vector and subsequently transfected to mammalian cells. Although the protein expression level of Bombina orientalis aromatase was low, it had a significant aromatase activity. When EDCs were added to aromatase transfected cells, aromatase activity was significantly decreased. We report here that this system may be used to monitor the effect of EDCs on aromatase activity of aquatic organisms.

• BMB Reports
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• 제47권3호
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• pp.149-157
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• 2014

The recent dramatic improvements in high-resolution mass spectrometry (MS) have revolutionized the speed and scope of proteomic studies. Conventional MS-based proteomics methodologies allow global protein profiling based on expression levels. Although these techniques are promising, there are numerous biological activities yet to be unveiled, such as the dynamic regulation of enzyme activity. Chemical proteomics is an emerging field that extends these types proteomic profiling. In particular, activity-based protein profiling (ABPP) utilizes small-molecule probes to monitor enzyme activity directly in living intact subjects. In this mini-review, we summarize the unique roles of smallmolecule probes in proteomics studies and highlight some recent examples in which this principle has been applied.

• 정보보호학회논문지
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• 제30권6호
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• pp.1237-1246
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• 2020

최근 마이크로 아키텍처의 취약점을 이용하여 내부의 비밀 정보를 노출시키는 캐시 부채널 공격들이 제안되었다. 캐시 부채널 공격 중 Flush+Reload 공격은 높은 해상도와 낮은 노이즈 특성으로 인해 여러 악의적 응용 공격에 활용되고 있다. 본 논문에서는 CPU 캐시 활동을 관측할 수 있는 PCM(Performance Counter Monitor) 기능을 이용하여 캐시 기반 부채널 공격을 찾아낼 수 있는 탐지기를 구현하였다. 특히, Spectre 공격과 AES 암호 연산 중 비밀 키 추출 공격이 발생했을 때를 가정하여 PCM 카운터 값의 변화를 관측하였다. 실험 결과, PCM의 4가지 카운터 특성이 캐시 부채널 공격에 크게 반응함을 확인하였고, SVM(Support Vector Machine). RF(Random Forest), MLP(Multi Level Perceptron)와 같은 머신 러닝 기반 검출기를 통해 높은 정확도로 캐시 부채널 공격을 탐지할 수 있었다.

• 한국전문물리치료학회지
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• 제28권4호
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• pp.251-255
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• 2021

Background: Physical activity and quality of life (QOL) influence the health status of older adults. Recently, the use of wearable devices to monitor physical activity has increased. Objects: This study examined the relationship between the amount of physical activity, measured using a wearable device, and QOL among older adults. Methods: In total, 71 older adults (aged ≥ 65 years) were enrolled. The amount of physical activity was measured using a wearable device with a wrist strap, and daily physical activity was classified according to intensity (sedentary, light, moderate, or very active). Self-reported QOL was evaluated using the Short Form 36 (SF-36) questionnaire. Pearson and Spearman correlation analyses were conducted to analyze parametric and non-parametric variables, respectively. The relationship between amount of daily physical activity and SF-36 scores was assessed. Results: The correlation analyses revealed positive correlations between the amount of moderate-intensity and very active physical activity (minutes/day) and SF-36 scores (p < 0.05). Conclusion: Physical activity of at least moderate intensity is associated with better QOL in older adults. Further studies are required to verify the effects of increased physical activity on QOL in older adults.

• 한국방재안전학회논문집
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• 제7권1호
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• pp.1-8
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• 2014

서울거리모니터 실태조사에 따르면, 2013년 서울시 균형성과지표 5,000건 대비 18,490건(12월말 기준)을 신고하여 17,903건을 조치하였다. 2012년 1,151건의 신고에 비해 대폭 증가하였지만 지역 연령 직업 성별 편차가 심하고 전체인력의 3.9%에 불과한 우수 활동자 25명이 13,880건을 신고하여 총 신고실적의 75.1%에 달하는 높은 의존도를 나타냈다. 거리모니터활동은 허버트 윌리엄 하인리히(H.W Heinrich)의 재해발생 "도미노이론"과 "1:29:300의 법칙"에 의거하면 불안전한 상태를 제거함으로서, 사망자 54명, 중경상자 1,573명과 잠재적 부상자 16,275명을 감소시켜 총 17,903명에 달하는 서울시민의 생명을 존중하고 보호하였다. 본 연구에서는 서울거리모니터와 강동구거리모니터 비교분석을 통한 문제점을 도출하여 모니터링활동의 효율적인 개선방안을 제시하였다.

• 한국학교보건학회지
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• 제18권2호
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• pp.85-92
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• 2005

Purpose： This study reviews the Youth Risk Behavior Surveillance System (YRBSS) in the United States. This review focuses on the purposes, questionnaires, survey methods, and use of survey results. The author also discussesthe establishment and use of Korean Youth Risk Behavior Surveillance System. Results：The YRBSS was developed in 1990 to monitor priority health risk behaviors that contribute to the leading causes of death, disability, and social problems among youth and adults in the United States. The purpose of YRBSS is to determine the prevalence of health risk behaviors, to assess the trend of health risk behavior prevalence, provide comparable data, monitor progress toward achieving the Healthy People 2010. The questionnaires inquire about health-related behaviors, including tobacco use, unhealthydietary behaviors, inadequate physical activity, alcohol and drug use, sexual activity, behaviors that contribute to unintentional injuries and violence. The results of YRBS have been used to estimate the prevalence of risk behaviors among youth, to set goals for school health programs, for training and development of health program personnel, for the development of health education curriculum, to support enactment of health-related regulations, and to support funding for futher research. Conclusions： The YRBSS represents a potentially valuable program that can be applied in Korea. Assessment of risk behaviors among Korean youths will provide invaluable insight for many potential purposes.

• The Journal of Korean Physical Therapy
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• 제23권2호
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• pp.7-15
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• 2011

Purpose: We investigated the relationship between the muscle activity and kinematic variables of the upper extremity during a push-up task on stable and unstable surfaces. Methods: We recruited 15 healthy subjects. Subjects completed the push-up task on stable and unstable surfaces. Surface electromyograms were recorded from the serratus anterior, upper trapezius, latissimus dorsi, infraspinatus to monitor changes in muscle activity. Markers for kinematic changes of elbow flexion, shoulder extension, shoulder retraction and scapular adduction were attached at C7, the T7 spinous process, both acromions, the scapula superior and inferior angle, the humerus lateral epicondyle, and the ulnar styloid process. Correlation coefficients between muscle activity and kinematic variables were analyzed by SPSS for Windows, version 15.0. Results: On the unstable surface, elbow flexion and shoulder extension increased with increasing muscle activity of serratus anterior, upper trapezius and infraspinatus. On the stable surface, shoulder retraction decreased with increasing muscle activity of serratus anterior and infraspinatus. Scapular adduction decreased with all types of increasing muscle activity, regardless of the support surface. Conclusion: Correlations between muscle activity and kinematic variables were observed on stable and unstable surfaces during a push-up task, while correlations between right and left variables were not clear. These finding suggest that it may be used to develop a rehabilitation program which could be effective in improving shoulder function in patients with shoulder problems.

• Journal of Electrical Engineering and Technology
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• 제9권1호
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• pp.372-377
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• 2014

Being able to monitor the heart will allow the diagnosis of heart diseases for patients during daily activities, and the detection of burden on the heart during strenuous exercise. Furthermore, with the help of U-health technology, immediate medical action can be taken, in the case of abnormal symptoms of the heart in daily life. Therefore, it appears to be necessary to develop the corresponding technology to monitor the condition of the heart daily. In this study, a novel wearable smart system was proposed, to monitor the activity of the heart in daily life, and to further evaluate the rhythm of arrhythmia. The wearable system includes three modified bipolar conductive fiber electrodes in the chest part, which can resolve the reduction problem of the magnitude of the signal, by magnifying the signal and removing the noise, to obtain high affinity and validity for medical-type usage (<0.903%). The biological signal acquisition and data lines, and the signal processing engine and communication consist of a conductive ink, and the pic18 and ANT protocol nRF24AP2, respectively. The proposed algorithm was able to detect a strong ECG, signal and r-point passing over the noise. The confidence intervals were 96 %, which could satisfy the requirement to detect arrhythmia under the unconstrained conditions.

• 벤처창업연구
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• 제15권6호
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• pp.55-65
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• 2020

본 연구는 국가 경제 성장과 관련된 창업 (start-up) 활동에 영향을 미치는 요인을 분석하는 국가 수준에서의 실증 연구이다. 창업 활동의 기반인 기업가정신에 대한 개인 수준에서 분석과 달리 GEM (Global Entrepreneur Monitor)에서 발행한 연간 데이터베이스를 활용한 실증 분석을 수행하였다. 나라별 초기창업활동 (TEA: total early-stage entrepreneurial activity) 지수를 이용하여 TEA에 영향을 미치는 영향요인을 경제 요인과 비경제적 요인을 구분하여 분석하였다. 선행 연구를 기반으로 국민소득 수준, 실업률을 포함하여 국가의 문화적 특성 변수 등 9개 요인을 국가 창업 활동의 영향 요인으로 제시하였으며 경제발전 수준에 따라 요소주도형, 효율주도형, 혁신주도형으로 국가를 구분한 패널데이터를 회귀 분석 모형을 통하여 실증 분석하였다. 본 연구의 분석 결과, 기존연구들에서 설명하고 있는 국민소득 수준과 창업 활동 사이의 U자 형태'를 명시적인 2차 함수 회귀분석을 통하여 추정하였으며 그에 따라 창업활동의 변곡점이 되는 소득수준을 발견하였다. 이러한 결과를 통해서 요소주도형 및 효율성주도형 경제에서는 생계형 창업활동이 활발한 반면 혁신주도형 경제에서는 기회추구형 창업활동이 활발하다는 기존의 주장들을 설명할 수 있음을 보였다. 특히, 창업활동 활성화를 위한 정부지원 프로그램에 대해 실증분석해 본 결과, 요소주도형 및 효율성주도형 경제에서는 유의한 긍정적 효과를 미치고 있으나 혁신형 경제에서는 그 효과가 오히려 부정적이라는 결과를 발견하였다. 이는 창업지원 정책이 경제발전단계에 따라 달라져야 함을 보여주는 결과로서 많은 정책적 시사점을 제시한다. 마지막으로 창업관련 교육의 정도와 새로운 비즈니스를 지원하는 사회문화적인 규범으로서의 창업 문화는 국가의 경제 수준과 상관없이 모두 창업활동에 긍정적인 영향을 미치고 있음을 발견하였다. 이는 어느 단계의 경제이든 창업 문화 조성이 필요하다는 시사점을 함축하고 있다.