• Korean Journal of Occupational Health Nursing
• /
• v.30 no.3
• /
• pp.101-109
• /
• 2021

Purpose: This study aimed to measure COVID-19 stress and the quantitative electroencephalography (QEEG) stress quotient and identify the coping styles of face-to-face service industry employees during the COVID-19 pandemic. Methods: This cross-sectional study administered structured questionnaires consisting of sections on general characteristics, COVID-19 stress, and coping style for stress to 21 face-to-face service industry employees between April 1 and April 18, 2021. The physical tension & stress quotient and psychological distraction & stress quotient were measured in the prefrontal lobe with QEEG. Results: Emotional easiness (r=.62, p=.002) and escape-avoidance (r=.55, p=.009) as a passive coping style were associated with COVID-19 stress, and seeking social support as an active coping style was associated with the left physical tension & stress quotient (r=.47, p=.031). Conclusion: These findings provide evidence regarding the objective status of the mental health of face-to-face service industry employees using both a self-reported scale and neuroscientific indicators, including brain quotients.

• Science of Emotion and Sensibility
• /
• v.3 no.1
• /
• pp.63-71
• /
• 2000

본 연구에서는 20대의 건강한 남자대학생 45명을 대상으로 작업조건(안정상태, 연산작업상태, 휴식상태, 반복연산작업상태, 연산작업후 아정상태)과 연산레벨(연산작업의 난이도)에 따른 생리신호의 측정을 위한 실험 프로토콜을 제안하고 측정된 생리신호에 대한 분석을 하였다. 연산작업에 대하여 측정된 파라메터에 대하여 1) 정규분포화를 위한 파라메터의 변환 2) 파라메터간의 산관관계의 조사 3) 연산작업에 대한 파라메터의 표준화 4) 작업조건과 연산레벨에 대한 파라메터의 차이에 대한 유의성검정을 하여 연산스트레스를 평가할 수 있는 파라메터를 추출하였다. 연산작업시의 파라메터는 안정산태의 파라메터와 유의적인 차이를 나타내어 연구에 사용된 연산작업이 생리신호의 변화를 발생시키는 것으로 밝혀졌고 연산작업후의 휴식상태에서 측정된 대부분의 파라메터의 갓이 연산작업전의 안정상태의 파라메터의 통계적으로 유의적인 차이가 없어서 본 연구에 사용된 연산작업은 단기적 스트레스를 유발하는 것으로 밝혀졌다. 그리고, 동일한 연산레벨에 대한 연산작업을 반복하더라도 파라메터의 값은 처음으로 연산작업을 할 때의 파라메터의 값과 유의적인 차이가 없었다. 그러나, 연산레벨에 따라서는 Heart Rate, HRV의 LF/HF, HRV의 MF/(LF+HF), Return Map의 분산, 코끝의 Mean Temperature, GSR-Mean과 호흡수는 차이가 있는 것으로 밝혀졌다. 따라서 이들 파라메터를 사용하면 연산스트레스의 강도를 지수화할 수 있을 것이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2022.10a
• /
• pp.104-106
• /
• 2022

Single-person households are steadily increasing every year, and unlike multi-person households, the incidence of depression is higher because they are mentally isolated. There are many causes of depression, including physical activity, family size, and stress. Less physical activity and more stress are associated with higher rates of depression. As the number of single-person households increased, and the COVID-19 outbreak in 2019 caused restrictions on physical activity due to the overlapping pandemic, the stress index increased, resulting in many depressed patients. Since many patients do not receive treatment even if they develop depression, we propose a depression management system to increase access to treatment for depression.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2022.09a
• /
• pp.3-3
• /
• 2022

배경: 독일 크나이프 요법을 국내에서 적용하기 위해 검증 연구가 필요하다. 목적: 국내 산림 환경에서 적용한 크나이프 요법이 자율 신경계 및 회복탄력성에 미치는 영향을 규명하기 위함이다. 방법: 크나이프 요법 중 4가지 요소('움직임', '삶의 질서', '음식 섭취', '치유 식물')를 고려한 중재 프로그램을 구성하여, 성인 40명을 대상으로 적용했다. 중재 전과 후에 맥파측정기(uBioMacpa)를 이용하여 HRV(TP, VLF, LF, HF, LF/HF, CSI: Cumulative Stress Index)와 회복탄력성 지수를 측정하고 비교 분석했다. 결과: HRV를 분석한 결과, 프로그램 중재 후 연구 대상자의 TP(8.64%, p<.001), VLF(6.96%, p<.05), LF(15.86%, p<.001), HF(8.46%, p<.01), LF/HF(5.77%, p<.05)는 유의하게 증가하였고, CSI는 유의하게 감소하였다(16.06% p<.001). KRQ-53 평균 점수는 191.56점에서 206.22점으로 14.66점 증가한 것으로 나타났다. 결론: 국내 산림 환경에서 적용한 크나이프 요법은 자율신경계를 전체적으로 활성화하고, 교감과 부교감신경의 활성도를 높여 심장 활동을 촉진시키며, 누적 스트레스를 감소시켜 주었다. 그리고 회복탄력성을 개선하는 것으로 나타났으며(p<.05), 특히 자기 조절 능력 요인에서 그 효과가 큰 것으로 확인되었다. 본 연구의 결과는 크나이프 요법이 국내 산림 환경에서 치유 프로그램으로 활용되어 스트레스 해소를 포함한 자율 신경계의 긍정적인 효과를 제시한 초기적인 최초의 증거라 할 수 있다.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.20 no.2
• /
• pp.350-357
• /
• 2014

Purpose: The purpose of this study was to investigate dysmenorrhea in undergraduate students and its affecting factors. Method: The survey was conducted with 453 students at 4 nursing school in Seoul, Incheon, Chungcheongbuk and Jeollabuk Province. Data were collected from September to December 2013, and analyzed with SPSS Windows 21.0. Results: In a final model of hierarchial multiple regression, menarcheal age (${\beta}$=-0.13, p=.003), menstrual amount (${\beta}$=0.17, p=.001), stress (${\beta}$=0.18, p=.010) habit of sitting by crossing one's legs (${\beta}$=0.14, p=.003) were associated with dysmenorrhea in undergraduate students. These factors attributed to 12.0% of variance in the dysmenorrhea of undergraduate students. Conclusion: These results suggest that dysmenorrhea in undergraduate student could be influenced by habit of sitting by crossing one's legs as well as menstrual history and stress. Ultimately, intervention program including correct of cross-legged sitting postures can be effective for undergraduate students to alleviate dysmenorrhea.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2016.10a
• /
• pp.878-879
• /
• 2016

본 논문에서는 기존의 고비용-고정형 거짓말탐지기의 단점을 극복하기 위하여 거짓말 시 발생되는 인체의 생리적 변화를 측정하기 위한 GSR (Galvanic Skin Response) 센서와 스트레스수치 알고리즘을 활용하여 스마트폰 기반 어플리케이션을 개발 및 그 활용방안을 제안한다. 사용자에게 부착하여 사용자의 생체 피부를 통해 외적자극 또는 심적 흥분/동요 상태에 의한 활동전위 발생 정도를 측정하고 이를 스트레스 지수로 변환할 수 있는 방법을 제시한다. 또한, 사용성 및 저비용성을 보장하기 위하여, 제안하는 거짓말 탐기기능을 스마트폰 어플리케이션화 하였다.

• Journal of Korean Society for Quality Management
• /
• v.10 no.1
• /
• pp.2-6
• /
• 1982

Suppose a system with m components is subjected to a random stress. We consider the estimation of reliability when data consist of random samples from the stress distribution and the strength distributions. All the distributions are assumed to be independent exponential with unknown scale parameters. An explicit form of system reliability and the minimun variance unbiased estimator are obtained. The asymptotic distribution is also obtained by expanding the minimum variance unbiased estimator about the maximum likelihood estimator and establishing their equivalance. The performance of the two estimators is compared by Monte Carlo Simulation.

• Korean Journal of Poultry Science
• /
• v.43 no.3
• /
• pp.177-189
• /
• 2016

This study was conducted to verify the relationships between the expression values of stress-related markers and their production performances in 25 strains of Korean domestic chicken breeds. For stress response markers, the amount of telomeric DNA; expression levels of heat shock protein (HSP)-70, $HSP-90{\alpha}$, and $HSP-90{\beta}$; and comet scores were analyzed. Production performances were measured by the survival rate, body weights, days at first egg laying, egg weight and hen housed egg production. The results showed that the production traits and values of stress-related markers showed significant differences between strains. In general, the stress response of pure bred chickens with heavy weights was relatively high, while that of hybrid chickens with light weights was relatively low. The correlation coefficients between telomere contents and body weights showed that there were weak negative relationships. However, the correlations of telomere content with the survival rate and egg production were weakly positive after 20 weeks old. The expression levels of HSP genes and DNA damage rate (comet scores) were positively correlated to body weight, but were negatively correlated to the survival rate and egg production. The results implied that increasing body weight was associated with increasing HSPs expression and the DNA damage rate was associated with decreasing telomere content. In addition, increasing HSPs expression and the DNA damage rate decreased the survival rate and egg production, but the relationships with the telomere content was the reverse. Correlations among the stress-related markers showed that there were significant correlation coefficients between all of the marker values. HSPs expression was negatively correlated to the telomere content, while it was positively correlated to the DNA damage rate. There was a highly negative correlation between the telomere content and DNA damage rate. In conclusion, increasing the HSP values and DNA damage rate can promote telomere reduction, which led to a decrease in disease resistance and robustness of the chicken. Thus, increasing the stress response was verified to adversely affect the laying performance and viability of chickens.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.9 no.3
• /
• pp.695-701
• /
• 2008

This study has been made to research on the brain wave characteristics of baduk expert by BCI(Brain Computer Interface). The test was based on the researches from 1th September, 2005 to 30th December, 2005, compared with the ones of the standardized general public. The number of the general public are 695 (elementary school students 423, middle and high school students 161, adults 111) and the number of the baduk players are 57 (researchstudents 15, Korean baduk club students 16, professional baduk players 26). The research data show that the baduk players have the higher indexes than the general public in Self Regulation quotient p=.002, Attention Quotient(left) p=.002, Emotion Quotient p=.027, Stress Quotient(left) p=.002 and Brain Quotient p=.006. There are some differences in brain functions between baduk players and the ordinary people. Difference in functions of the brain among baduk experts is also analyzed. That result shows that there is no different brain function between professional baduk player.

• Korean Journal of Remote Sensing
• /
• v.33 no.5_1
• /
• pp.507-519
• /
• 2017

The applications of NDVI (Normalized Difference Vegetation Index) as a vegetation index has been widely used to understand vegetation biomass and physiological activities. However, NDVI is not suitable way for monitoring vegetation stress because it is less sensitive to change in physiological state than biomass. PRI (Photochemical Reflectance Index) is well developed to present physiological activities of vegetation, particularly high-light-stress condition, and it has been adopted in several satellites to be launched in the future. Thus, the understanding of PRI performance and the development of analysis method will be necessary. This study aims to interpret the characteristics of light-stress-sensitive PRI in shadow areas and to evaluate the PRI calculated by other wavelengths (i.e., 488.9 nm, 553.6 nm, 646.9 nm, and 668.4 nm) instead of 570 nm that used in original PRI. Using airborne-based hyperspectral image, we found that PRI values were increased in shadow detection due to the reduction of high light induced physiological stress. However, the qualities of both PRI and NDVI data were dramatically decreased when the shadow index (SI) exceeded the threshold (SI<25). In addition, the PRI calculated using by 553.6 nm had best correlation with original PRI. This relationship was improved by multiple regression analysis including reflectances of RED and NIR. These results will be helpful to the understanding of physiological meaning on the application of PRI.