• 치위생과학회지
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• 제20권3호
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• pp.126-135
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• 2020

Background: The purpose of this study is to investigate the effects of entrance exam stress on oral health behaviors and subjective oral health status in female high school students. Methods: A self-reported questionnaire was administered to 216 female high school students in the Gwangju area. We performed an independent t-test, one-way analysis of variance (ANOVA), Pearson's correlation coefficient, and multiple regression analysis using the SPSS/WIN 21.0 program. Results: The average of the entrance exam stress was 2.73, and among the sub-areas, the tension for exam/poor stress was the highest with 3.21. As a result of analysis of general characteristics and subjective oral health status, oral mucosal disease was lower in family income level (p<0.05), bad breath was significantly higher with lower academic performance (p<0.001) and family income level (p<0.05). As a result of oral health behavior and subjective oral health status analysis, dental caries has more than 4 times of caries snacks (per week) (p<0.05), bad breath was found to be more perceived when the average number of daily brushing was 2 or less (p<0.01). Factors affecting subjective oral health status were that dental caries was a patients pressure stress (β=0.202); temporomandibular disorder (β=0.227), xerostomia (β=0.342), and oral mucosal disease (β=0.190) were insufficient spare time; bad breath was academic performance (lower) (β=0.231) and insufficient spare time (β=0.184). There was a statistically significant positive correlation between the subjective oral health status and the subarea of entrance exam stress, excluding future uncertainty stress. Conclusion: It is considered that oral health education should be conducted to prevent oral diseases for students with high parental pressure and insufficient spare time stress as well as finding practical ways to reduce entrance stress.

• 한국운동역학회지
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• 제26권2호
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• pp.183-190
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• 2016

Objective: The objective of this study is to present a scientific basis for ballet dancer training methods by analyzing the relationships between subjective assessment of the ballet movement 'Grand pas de chat' and kinematic and electromyographic factors. Method: The subjects were 14 professional dancers with 15 years of experience on average. Four cameras and a wireless electromyogram were used to examine kinematic factors, and the filmed videos were analyzed by 3 experts for subjective assessment. Results: Although no differences in kinematic factors were found between the excellent dancer group and the non-excellent dancer group divided based on the experts' assessment, some difference was found in electromyographic factors, especially in relation to the gastrocnemius muscle, rectus femoris muscle, and erector spinae muscle. A relationship between subjective assessment and kinematic and electromyographic factors was found, and factors such as right-side rectus femoris activation, time required, left-side gastrocnemius activation, and front-back displacement affected subjective assessment. Conclusion: This study showed a relationship between subjective assessment and kinematic and electromyographic factors. To receive higher scores in subjective assessment, it is necessary to extend the hang time by using the lower limb muscles. The findings of this study also indicate the necessity of weight training in order to improve dancing techniques.

• 수면정신생리
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• 제5권1호
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• pp.12-17
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• 1998

Circadian rhythms in subjective alertness, mood, and performance can be classified as psychological rhythm, compared with physiological rhythm such as body temperature and hormonal change. While in normal condition entrained by 24hr zeitgeber, subjective alertness would reach its maximum value around midday, subjective alertness would parallel body temperature rhythm with its peak at evening in non-entrained, free-running state. With desynchronization technique, subjective alertness rhythm is thought to be controlled by both temperature and sleep-wake rhythm oscillator. Circadian performance rhythms depend on the kind of task tested. It shows parallelism with body temperature rhythm when subjects are tested with simple, repetitive task. But when tested with tasks requiring complex verbal reasoning or immediate memory, subjects would perform them best at early morning, with performance decreasing as time of day advances. The desynchronization technique shows that circadian performance rhythm of simple, repetitive task is dependent on temperature oscillator but circadian performance rhythm of complex verbal reasoning is influenced by both temperature and sleep-wake rhythm oscillator or another independent oscillator. It would be worthwhile to compare psychological rhythm with hormonal change such as cortisol and melatonin. And more simple and time-saving method than desynchronization technique may facilitate the study of the mechanism underlying psychological rhythm.

• 대한의용생체공학회:의공학회지
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• 제24권4호
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• pp.355-361
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• 2003

본 연구에서는 인간의 주관적 감성 변화를 실시간으로 측정할 수 있는 시스템을 개발하였다. 본 시스템은 펜 마우스와 디지타이저론 이용하여 인간의 감성 변화론 실시간으로 입력 받을 수 있는 입력 부분과. 쾌도 및 긴장도의 감성 변화즐 실시간으로 측정하고 평가할 수 있는 감성평가 및 디스플레이 부분으로 구성되어있다. 본 연구에서는 된 시스템의 유효성을 검증하기 위하여 하나의 실험을 수행하였다. 20명의 20대 남녀 피험자를 대상으로 긍정 감성과 부정 감성을 유발시킬 수 있는 사진을 각각 1장식 제시하면서 실시간 주관적 감성 평가와 함께 Galvanic Skin Response (GSR)를 실시간으로 측정하였고, 실험이 종료된 후 설문지를 이용하여 비 실시간 주관적 감성 평가를 실시하였다. 이를 통해 실시간 및 비 실시간 주관적 감성 평가, 생리 신호 평가의 결과들을 비교하였다. 상관관계 계수의 비교로부터 긍정 사진 자극으로 유발된 실시간 주관적 감성 변화는 부정 사진 자극으로 유발된 GSR 반응과, 부정 사진 자극으로 유발된 실시간 주관적 감성 변화는 부정 사진 자극으로 유발된 GSR 반응과 더 밀접한 관계가 있었다. 또한 설문지를 이용한 비 실시간 주관적 감성 평가 결과는 실시간 주관적 감성 평가의 누적된 평균 감성 값과 유사하였다. 이러한 결과로부터, 본 시스템의 가장 큰 특징은 시간에 따라 시시각각으로 변하는 인간의 주관적 감성 크기 변화를 관찰할 수 있다는 것과 자극제시 기간 동안의 평균적인 감성 평가가 가능하다는 것이다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.743-748
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• 2002

The eventual Purpose of this research is to make optimum standards for acoustic-environment by using not only physical characteristics but also subjective appraisals. Basic physical data were measured which were necessary to establish standards for acoustic environment in campus buildings, TSP has used to measure sound levels, reverberation times, clearness indexes, and speech-transmission-index. In addition to physical characteristics, questionnaires were given to university students to given subjective appraisals. For instance, questions about volume or clearness of lectures. The relevancy between physical characteristics and subjective appraisals was studied.

• 교육심리연구
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• 제31권3호
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• pp.389-408
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• 2017

이 연구는 대학생의 시간압박감과 자유재량시간이 성별에 따라 차이가 있는지와 주관적 안녕감과 어떤 관계가 있는지를 밝히는데 목적을 두고 있다. 이를 위하여 부산 경남지역의 대학생 493명을 대상으로 시간압박감, 자유재량시간, 주관적 안녕감(삶의 만족도, 긍정정서, 부정정서)검사를 실시하여 다음과 같은 결과를 도출하였다. 첫째, 대학생의 시간압박감, 긍정정서, 부정정서는 성별에 따라 유의미한 차이를 보였다. 시간압박감와 부정정서는 여자 대학생이 높은 것으로 나타났고, 긍정정서는 남자 대학생이 높은 것으로 나타났다. 하지만 대학생의 자유재량시간과 삶의 만족도는 성별에 따라 차이가 없는 것으로 나타났다. 둘째, 대학생의 시간압박감은 삶의 만족도와는 부적 상관을 가졌으나 부정정서와 정적 상관을 보였다. 대학생의 자유재량시간은 삶의 만족도와는 정적 상관을 가졌으나 부정정서와 부적 상관을 보였다. 하지만 대학생의 시간압박감과 자유재량시간은 긍정정서와 상관이 없는 것으로 나타났다. 셋째, 회귀분석 결과 대학생의 시간압박감은 이들의 삶의 만족도와 부정정서를 유의하게 설명하였으나, 자유재량시간은 통계적으로 유의한 설명력이 없었다. 이와 같은 연구결과는 대학생의 주관적 안녕감을 증진시키기 위해서는 자유재량시간을 늘이기 보다는 시간압박감을 낮출 필요가 있으며, 남녀의 차이를 고려할 필요가 있음을 시사한다.

• 대한인간공학회지
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• 제29권4호
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• pp.687-691
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• 2010

Workload assessment is one of the important elements of the human factors evaluation for the nuclear power plants in operation. This paper describes a further study upon the additional elements of the workload which elements should be considered in the subjective workload assessment. We have tried to predict the burden of the work and to improve the work through a comparison of the objective workload and the subjective workload in the previous studies in nuclear power plants. However, there is a restriction to perform a precise assessment because of the limitations of the method itself. The objective workload assessment is performed by relative comparison using the quadrant analysis with objective workload and subjective workload because there were no clear criteria of objective workload assessment. And the subjective workload assessment is performed by NASA-TLX (NASA Task Load Index) which includes six evaluation dimensions of subjective workload. NASA-TLX is difficult to grasp the other aspects that could influence on the subjective workload because the analysis relies on predetermined assessment items. We conduct a factor analysis between the factors that affect the workload and the assessment adopted from ISO 10075 and NASA-TLX. At the same time, this study suggests other evaluation elements which can be added for subjective workload assessment except for evaluation elements of NASA-TLX.

• 가정과삶의질연구
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• 제29권6호
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• pp.71-87
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• 2011

The purpose of this study was to investigate perceptions of the self-efficacy of youth (self-confidence, self-regulatory efficacy, and task difficulty preference) and the subjective quality of life. The participants in this research were 697 university students 314 males and 383 females. All respondents submitted their answers on a self-report questionnaire. The data were analyzed with descriptive statistics, t-tests, Pearson's correlations, and multiple regression analyses. The major results of this study were as follows: (a) Young males exhibited higher levels of self-efficacy perception compared to young females. Regarding the subjective quality of life, gender was not a significant factor. (b) The subjective quality of life was highly correlated with the self-efficacy of youth (self-confidence, self-regulatory efficacy, and task difficulty preference). (c) Self-satisfaction, self-confidence regarding one's career, satisfaction with one's friends, satisfaction with one's parental relationship, quantity of reading, and the amount of study-time all had significant influences on the self-efficacy of youth, whereas the family's socioeconomic status and campus life satisfaction were not significant factors. (d) Self-efficacy had the strongest influence on the youth subjective quality of life. Self-satisfaction, campus life satisfaction, and satisfaction with friends all had significant influences on the youth subjective quality of life, whereas the quantity of reading, the amount of study-time, self-confidence with one's career, the family's socioeconomic status, and satisfaction with one's parental relationship were not significant factors. However, self-confidence with one's career, satisfaction with one's parental relationship, the family's socioeconomic status, and quantity of reading all had different levels of influence on the subjective quality of life for young males and females.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2003년도 춘계학술대회 논문집
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• pp.120-122
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• 2003

In this study, an experiment was conducted in order to investigate the feasibility and effectiveness of and on-line subjective assessment (OLSA) system. The present study compared Galvanic Skin Response (GSR) with the OLSA by presenting 28 subjects in their 20s with pictures arousing either positive or negative sensibility. According to the correlation coefficients, changes in subjective sensibility caused by the positive visual stimulus were related more closely to GSR, from the positive visual stimulus, and changes in subjective sensibility caused by the negative visual stimulus were related more closely to GSR from the negative visual stimulus. In conclusion, the most remarkable characteristic of the present system is that it not only assesses the average sensibility when stimuli are presented, but also shows the changing strength of sensibility over time.

• 한국항해학회지
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• 제18권4호
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• pp.1-9
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• 1994

Assessment of the safety of ship's transit in the narrow channel consist of the maneuvering safety determined by the chance of running aground, the maneuvering difficulty determined by ship's workload and master's subjective evaluation. To examine the relation between master's subjective evaluation and maneuvering safety, this utilizes a real-time and full-mission shiphandling simulator in the Korea Marine Training & Research Institutes(KMTRI). The vessel chosen was 60,000-ton, Panamax-type ship. The findings regarding master's subjective evaluation were as follows: -Relation between master's subjective evaluation and common logarithms of stranding probability is linear. -Stranding probability with more than 0.001 is master's subjective evaluation with more than 5.