• 융합정보논문지
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• 제11권10호
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• pp.10-19
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• 2021

본 논문은 뇌파 측정 및 분석을 통해 정신적 피로를 반영하는 특징 파라미터를 도출하고자 하였다. 이를 위해 30분간 눈을 감은 편안한 안정 상태와 뺄셈연산을 암산으로 수행하는 작업을 통해 정신적 피로를 유도하였다. 5명의 피험자가 실험에 참가하였으며, 피험자들은 모두 대학 재학 중인 오른손잡이 남학생들이며 평균 나이는 25.5세이다. 정신적 피로를 반영하는 특징 파라미터 도출을 위해 실험 처음과 마지막에서 수집된 뇌파에 대해 스펙트럼분석을 수행하였다. 분석 결과, 정신적으로 피로할수록 후두엽 및 측두엽 위치에서 알파대역의 절대파워는 증가한 반면 상대파워는 감소하였다. 또한 안정 상태와 작업 상태간 파워 차이는 절대파워에 비해 상대파워가 크게 나타났다. 이 결과는 후두엽 및 측두엽 위치에서의 알파 상대파워가 정신적 피로를 반영하는 특징 파라미터임을 나타낸다. 본 연구 결과는 운전 중 피로 및 졸음 판단과 같은 정신적 피로 판별을 위한 자동화시스템 개발을 위한 특징 파라미터로 활용될 수 있다.

• 한국농촌건축학회논문집
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• 제10권2호
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• pp.17-26
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• 2008

There are many problems for the rural old peoples who to use the rural houses practically with physical and mental disabilities to make use of them because the rural houses have a tendency to look alike the urban houses. Today the rural old peoples are treated distantly by the boundary of national reserved power to make and activate their facilities, the shortness of their economically surplus power and the absence nationally social security system in spite of their physical and mental disabilities. So it is necessary for us to remodel symmetrically their rural houses to fit their physical and mental disabilities to spend comfortable living and to develop structure remodeling programs and space reorganization programs of the rural handicapped old peoples' houses to support independent life to correspond with their physical and mental disabilities.

• 한국체육학회지인문사회과학편
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• 제54권3호
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• pp.231-242
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• 2015

이 연구는 운동선수의 자기관리와 자기성찰에 의한 감성지능을 검증하는 데 목적이 있다. 이러한 목적을 규명하기 위한 연구대상은 대학운동선수 총 200명을 무선으로 표본추출 하였다. 운동선수로 협회 등록이 되어있는 대학선수 중에서 서울지역 소재 K대학을 중심으로 최종 표집하였다. 자기관리는 허정훈(2001)이 사용한 선수자기관리 문항을, 자기성찰은 황주연(2011)이 검증한 문항을, 감성지능은 김성은(2010)이 사용한 감성지능을 사용하였다. 설문구성은 5점 리커트(Likert)척도이며, 신뢰도계수인 내적합치도는 .68~.85이다. 조사절차는 자기평가기입법으로 완성된 설문지를 상관분석과 다중회귀분석으로 검증한 결과, 첫째, 자기관리의 훈련관리는 자기탐색에, 대인관계관리와 몸관리는 타인이해에, 몸관리는 타인탐색에 정신력관리는 자기이해 등에 정적으로, 고유행동관리는 타인탐색에 부적으로 영향을 미치는 것으로 나타났다. 둘째, 자기관리의 정신력관리는 자기감성인식에, 정신력관리와 생활관리는 감성활용에, 정신력관리는 타인감성인식에, 정신력관리와 대인관계관리는 감성조절에 정적으로 유의한 영향을 미치는 것으로 타나났다.

• 정신간호학회지
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• 제28권2호
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• pp.156-164
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• 2019

Purpose: The aim of this study was to identify factors influencing on the mental health in bereaved adults. Methods: A descriptive and correlational study was conducted in 160 adults who had experienced bereavement. The collected data was analyzed using descriptive statistics, Pearson's correlation, and hierarchical multiple linear regression analyses with SPSS 26.0. Results: The participants' mental health showed a positive correlation with complicated grief (r=.31, p<.001) and a negative correlation with grief and meaning reconstruction (r=-.30, p<.001). Sex, sleeping time, intimacy with the deceased, grief reaction, and grief and meaning reconstruction were significant factors influencing on the mental health. The total explanatory power of these variables was 31.8%. Conclusion: It is necessary to explore the persistent and impairing grief after experiencing bereavement. Our study findings will be fundamental evidence to develop nursing interventions to improve adult mental health dealing with bereavement and grief.

• Nuclear Engineering and Technology
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• 제51권2호
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• pp.453-462
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• 2019

Mental workload (MWL) is a major consideration for the user interface design in nuclear power plants (NPPs). However, each MWL evaluation method has its advantages and limitations, thus the evaluation and control methods based on multi-index methods are needed. In this study, fuzzy comprehensive evaluation (FCE) theory was adopted for assessment of interface designs in NPP based on operators' MWL. An evaluation index system and membership functions were established, and the weights were given using the combination of the variation coefficient and the entropy method. The results showed that multi-index methods such as performance measures (speed of task and error rate), subjective rating (NASA-TLX) and physiological measure (eye response) can be successfully integrated in FCE for user interface design assessment. The FCE method has a correlation coefficient compared with most of the original evaluation indices. Thus, this method might be applied for developing the tool to quickly and accurately assess the different display interfaces when considering the aspect of the operators' MWL.

• Journal of Nutrition and Health
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• 제36권9호
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• pp.918-923
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• 2003

L-theanine Is an amino acid in green tea and has been known to decrease serotonin and increase norepinephrine in rat brains, and also reported to produce mental relaxation, lower blood pressure and improve learning ability in human beings. But, few studies on these effects for human beings have been conducted so far. This study was conducted to evaluate the effect of L-theanine on the release of brain alpha waves known to be related with mental relaxation and concentration. Twenty healthy male volunteers aged 18 to 30 years without any Physical and Psychological diseases were recruited through written advertisement. Alpha power values of EEG as a surrogate marker of mental relaxation and concentration were measured in frontal and occipital regions for 40 minutes after administration of four placebo or test tablets and 20 minute resting period. The same procedure crossed over at 7-day intervals. We analyzed average alpha power values in frontal and occipital regions at 10 minute intervals. Repeated ANOVA revealed that there were significant differences of occipital alpha power values between placebo and test groups with high anxiety (p < 0.05). The mean values at 20,30,40,50 and 60 minute intervals were 0.23, 024, 0.28, 0.25 and 0.34 in placebo, respectively and 0.23, 0.29, 0.40, 0.34, and 0.45 in test, respectively. But there were no significant differences of frontal and occipital alpha power values between placebo and test groups with low anxiety (p > 0.05) . The results of this study suggest that L-theanine containing tablets promote the release of alpha waves related to mental relaxation and concentration in young adult males.

• 융합보안논문지
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• 제17권2호
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• pp.137-144
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• 2017

장병들의 무형전력을 구성하는 정신전력은 최근에 우리가 처한 안보상황을 감안할 때 매우 중요하다고 하겠다. 동서고금을 막론하고 전쟁사를 살펴보면 무형전력은 국가의 흥망성쇠는 물론 전쟁의 승패를 좌우하는 핵심적인 요소로 평가되고 있다. 최근 우리 군이 군에서 시행되고 있는 정신교육을 개선하기 위해 나름대로의 노력에도 불구하고 여전히 대다수의 장병들은 정신교육을 '의례적인 교육, 지루한 교육, 시간 때우기 식 교육'으로 여기고 있으며, 불미스러운 군 관련 사건과 사고가 발생할 때마다 정신교육의 효과에 대해 의문과 문제가 끊임없이 지적되고 있는 실정이다. 따라서 본 연구는 바로 이러한 문제의식에서 시작된 것으로서 그 목적은 현행 군 정신교육의 문제점을 분석함으로써 인지중심의 군 정신교육의 발전방향을 모색하여 다변화 시대에 적합한 강군을 양성하는데 방향을 제시하고자 한다.

• 대한한의학회지
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• 제29권2호
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• pp.107-115
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• 2008

Objectives: The objective of this study was to assess the effects of acupuncture applied at PC6 and SP4 points on heart rate variability (HRV) in normal subjects under mental stress Methods: 24 healthy male subjects were recruited and randomized to a treatment group (12 subjects) or a control group (12 subjects). Both groups performed a mental arithmetic stress test and then acupuncture needles were inserted on PC6 and SP4 for the study group. In the control group, they took sham acupuncture as a control. Heart rate variability (HRV) was measured during the whole study period by FM-150 (digital Holter ECG recorder). Results: In the both groups, low frequency (LF) power and ratio of low frequency to high frequency (LF/HF) was significantly increased after mental stress. Acupuncture induced significant decrease in low frequency (LF) power and ratio of low frequency to high frequency (LF/HF) which were increased after mental stress test. But sham acupuncture induced no changes. Results: In both groups, low frequency (LF) power and ratio of low frequency to high frequency (LF/HF) significantly increased after mental stress. Acupuncture induced significant decrease in low frequency (LF) power and ratio of low frequency to high frequency (LF/HF) which increased after mental stress test. In contrast, sham acupuncture induced no changes. Conclusions: Acupuncture on PC6 and SP4 could be useful to decrease sympathetic activity and balance autonomic nervous system for those who are under stress.

• 동의신경정신과학회지
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• 제21권4호
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• pp.163-173
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• 2010

Objectives : The objective of this study was to assess the effects of acupuncture applied at 114 and Liv3 points on heart rate variability (HRV) in normal subjects under mental stress. Methods: 36 healthy male and female subjects were recruited and randomized to a treatment group(18 subjects) or a control group (18 subjects). After 10-minutes rest period and instrumentation, both groups performed a mental stress test(Stroop color word test, Arithmetic test. four rule of arithmetic task) for l6-minutes. HRV was recorded before and after the mental stress. And then acupuncture needles were inserted on 114 and Liv3 for the study group. In the control group, they rested for l5-minutes. And Heart rate variability(HRV) was measured. Results: In the both groups, low frequency(LF) power, normalized low frequency power(LF(norm)) and ratio of low frequency to high frequency(LF/HF) was significantly increased after mental stress. Acupuncture induced significant decrease in low frequency(LF) power, normalized low frequency power(LF(norm)) and ratio of low frequency to high frequency (LF/HF) which was increased after mental stress test. In contrast, control group induced no changes. Conclusions : Acupuncture on 114 and Liv3 could be useful to decrease sympathetic activity and prevent the alteration of autonomic nervous system due to mental stress.

• Journal of Acupuncture Research
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• 제21권5호
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• pp.227-239
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• 2004

Objectives : The purpose of this study was to assess the effect of acupuncture for reducing mental stress using power spectrum analysis of the heart rate variability. Methods : 5 healthy volunteers participated in this study. After instrumentation and 5-minute rest period, mental stress was provided for 5-minute. HRV was recorded before and after the mental stress. Acupuncture was put on the HT8, and needle was removed after 15min. Than 2nd mental stress was given for 5-minute with same method. For the control, same process was repeated to same subject except for acupuncture. Results : After mental stress, LF and LF/HF ratio is significantly increased. After acupuncture treatment, LF/HF ratio is significantly decreased, and LF do not significantly changed despite of mental stress. Conclusions : The result suggest that acupuncture treatment can regulate and prevent the alteration of autonomic nerve system due to mental stress.