• The Journal of the Korea Contents Association
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• v.21 no.1
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• pp.456-464
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• 2021

The purpose of this study was to identify the risk factors related to prehypertension in Korean adults. The data were collected from the Korean National Health and Nutrition Examination Survey 2018. The subjects of this study were 3,286 adults aged over 30 years of old. We analyzed risk factors of prehypertension using multiple logistic regression based on complex sample design. The prevalence of prehypertension was 60.8%. As the result, the risk of prehypertension in elderly, current smoking persons, overweight, obesity, hyperlipidemia in triglyceride and HDL cholesterol. And the risk of decreased in health check-up, aerobic physical activity. Therefore, in order to reduce the incidence of prehypertension, it is required to prepare interventions to prevent prehypertension through the adjustment of lifestyle for subjects with risk factors for developing prehypertension.

• School Mathematics
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• v.14 no.4
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• pp.495-516
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• 2012

This study distinguished thinking related to statistical variability into six components - the noticing of variability, the explanation of variability, the control of variability, the modeling of variability, the understanding of samples, and the understanding of sampling distribution and investigated the relationships among the thinking components. This study found that this distinction of thinking components related to statistical variability is reasonable. The results showed that each correlation coefficient of the modeling of variability, the understanding of samples, and the understanding of sampling distribution with regard to the noticing of variability, the explanation of variability, and the control of variability is similar. Based on this results, new variable, the understanding of sampling, has been drawn. The results also showed that while the noticing of variability and the control of variability influence the understanding of sampling, the explanation of variability does not influence it.

• Journal of Labour Economics
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• v.34 no.1
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• pp.71-101
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• 2011

Using an establishment-level panel data drawn from the employment insurance administrative DB, this study investigates the relationship between elderly and youth employment in Korea. The primary focus of interest is whether or not the ageing of workforce and an increase in elderly employment have negative impacts on youth employment. In the regression using the full sample, we find the evidence that a movement in elderly employment and ageing workforce are positively related to youth employment. However, we do not find consistent evidence of the positive impact of the elderly employment on youth employment in the estimations using sub-samples divided by various criteria.

• The Korean Journal of Zoology
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• v.29 no.3
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• pp.159-164
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• 1986

저자는 1985년 제주도 모슬포 항구에서 채집된 표본이 한국 미기록종(Caprella gigantochir, Mayar 1903)으로 동정되었기에 이에 보고하고자 한다. 또 저자가 1981년 고군산 군도의 해양동물 채집보고서에 2종의 한국 미기록종 (C.algaceus Vassilenko, 1967, C. monoceros Mayer, 1980)을 기재없이 보고한 바 있다. 이들도 함께 기재하였다. 이로써 한국 해역에서 보고된 Caprella속의 종은 모두 21종이 되었다.

• Communications of Mathematical Education
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• v.18 no.2 s.19
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• pp.209-216
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• 2004

제 7 차 수학과 교육 과정에서 이산수학이 수학과 선택과목으로 채택이 되었음에도 불구하고, 교사와 학생의 이산수학에 대한 인식이 부족하고 또한 교수-학습법에 대한 기준과 표본이 제시되어 있지 않은 상황에서 현재 고등학교에서 이산수학을 선택하는 학교와 학생의 수는 미미한 것으로 알려져 있다. 본 논문은 이러한 이산수학 교육의 상황 개선을 위한 고등학교 이산수학의 본연의 의미와 제 7 차 수학과 교육 과정에서의 이산수학 교육의 취지 및 목표 등을 고려하여 교육학적으로 보다 의미 있고 효과적인 교수-학습법을 제안하고자 한다.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.389-390
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• 2014

국내 과학기술 연구자의 요구를 만족시키는 고품질 콘텐츠를 제공하기 위한 기초작업으로 국가과학기술정보센터(NDSL) 콘텐츠의 가치평가 기준을 수립할 필요가 있다. 본 연구는 NDSL의 대표적인 콘텐츠인 논문의 가치에 영향을 미치는 요인들을 도출하고 각 요인별 측정 방안을 모색하였다. 제시된 콘텐츠 가치평가 기준에 의거하여 NDSL 콘텐츠 표본을 평가하고, 콘텐츠 가치평가 방안 기준이 적절한지를 분석하였다.

• Journal of Biomedical Engineering Research
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• v.9 no.1
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• pp.117-124
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• 1988

A new implementation of a noise tracking filter is prposed to eliminate time-varying 60 Hz noise and its harmonics and baselins wandering in biological signals. This technique was applied to ECG. Filter's notch frequency could track the power line frequency well and it showed much better characteristics than the conventional method.

• The Korean Journal of Applied Statistics
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• v.33 no.5
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• pp.555-567
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• 2020

Hypertension has a steadily increasing incidence rate as well as represents a risk factors for secondary diseases such as cardiovascular disease. Therefore, it is important to predict the incidence rate of the disease. In this study, we constructed nomograms that can predict the incidence rate of hypertension. We use data from the Korean National Health and Nutrition Examination Survey (KNHANES) for 2013-2016. The complex sampling data required the use of a Rao-Scott chi-squared test to identify 10 risk factors for hypertension. Smoking and exercise variables were not statistically significant in the Logistic regression; therefore, eight effects were selected as risk factors for hypertension. Logistic and Bayesian nomograms constructed from the selected risk factors were proposed and compared. The constructed nomograms were then verified using a receiver operating characteristics curve and calibration plot.

• 프린팅코리아
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• s.23
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• pp.82-85
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• 2004

현존하는 세계 최고의 금속활자본인 직지심체요절의 문화적 자산가치는 8694억원이라는 조사결과가 나왔다. 충북개발연구원(원장 이태열)은 최근 '직지의 가치추정 및 활용방안'이라는 연구보고서를 통해 "비시장 재화에 대한 화폐가치를 평가하는 조건부 가치측정(CVM) 방식으로 직지의 가치를 조사한 결과 이같이 추정됐다"고 밝혔다. 조건부 가치측정이란 환경과 문화, 관광자원 등 거래가 되지 않는 재화에 대한 가치를 평가하는 방법 중 하나로, 이번 조사에 제시된 조건은 '직지의 보전 및 세계화에 부담금을 낸다면 얼마를 낼 용의가 있는가'였다. 전국 340여명의 표본조사 응답자들은 이 질문에 44.4%(151명)가 '부담 의사있다'고 답변했고, 부담금은 5년간 매년 1만840원이 적정할 것이라고 말했다. 연구원 측은 이를 근거로 전국 가구 수에 적용할 경우 직지의 문화적 총자산가치는 8694억원에 달할 것으로 추정했다. 다음은 이번 보고서의 주요 내용을 요약한 것이다.

• Journal of Industrial Convergence
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• v.18 no.2
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• pp.1-7
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• 2020

This study was conducted to identify factors that affect subjective health in middle-aged with hypertension. Hypertension, a representative chronic disease, is a disease of increasing prevalence from middle age. To effectively manage hypertension from middle age, it is necessary to revise lifestyle based on subjective health awareness. The subjects of this study were 2,254 middle-age with hypertension who were 30-64 years of age among the 2014-17 national health and nutrition survey. Study variables consisted of general, physical, and psychological factors. For data analysis, compound statistics were made using SPSS 25.0 program and then complex statistics. The results of this study showed that the factors that significantly influenced the subjective health of the subjects were sex, age, economic level, number of households, home ownership, stress, quality of life, and their explanatory power was 20.4% (F = 12.58, p<.001). The results of this study can be used as a basis for the intervention to improve the subjective health of middle-aged with hypertension. Appropriate lifestyle modifications are needed to effectively manage hypertension based on good subjective health awareness.