• The Transactions of the Korean Institute of Electrical Engineers D
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• v.50 no.10
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• pp.486-493
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• 2001

Acrophobia is an abnormal fear of heights. Medications or cognitive-behavior methods have been mainly used as a treatment. Lately the virtual reality technology has been applied to that kind of anxiety disorders. A virtual environment provides patient with stimuli which arouses phobia, and exposing to that environment makes him having ability to over come the fear. In this study, the elevator stimulator that composed with a position sensor, head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a feel of phobia and without phobia, heart rate was measured during experiment. And also measured a person's HR after the virtual reality training and in a real building elevator. In this study, we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• Anxiety and mood
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• v.5 no.1
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• pp.21-28
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• 2009

Objective : Using patterns of change in heart rate variability (HRV), we investigated the effects of stress exposure and type of anger expression on cardiovascular diseases. Methods : Eighty-nine medical students were evaluated by STAXI-K, BDI, BAI, and measured HRV. According to the scores of anger expression questions in STAXI-K, objects are comparted to three groups. Each group is compared with others on the levels of depression, anxiety and HRV. Additionally objects are divided into two groups of functional anger expression group and dysfunctional anger expression group, and each group also divided into two groups, depending on the exposure of stressful situation or not. Members who took part in the stress exposure groups, they've got a serial arithmetic process for five minutes. We surveyed patterns of HRV in 4 each groups and estimated interactions between existence of stressful situation or type of anger expression and HRV. Results : Irrespective of stress manipulation, the dysfunctional anger expression group showed a marked increase in the LF/HF ratio in comparison to the functional anger expression group. Also, under conditions of stress manipulation, the stress exposure group exhibited a relatively increased level of TP. It can't be discriminated any correlations between stress manipulation and type of anger expression. Conclusion : Both of them, exposure to the stressful situation and type of anger expression, have influence on cardiovascular diseases. By controlling anger and way of express that, it is possible to diminish the incidence of cardiovascular diseases.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.273-276
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• 2011

우리는 감성 공학에 기반하여 일상 생활 속에서 비침습적이면서 사용하기 간편한 광전용적맥파신호를 계측하고 분석하는 이어폰형 생체 신호 측정 시스템에 관하여 연구하였다. 생체 신호 측정 시스템에서는 광전용적맥파(photoplethysmograph, PPG)와 3축 가속도로 생체 신호와 운동 신호를 활용하였다. 수신된 생체 신호인 광전용적맥파 신호는 Peak 검출 및 전처리 알고리즘을 통하여 심박동변동성(heart rate Variablity,HRV)에 대한 시계열 정보로 변환하고 고속 퓨리에 변환(Fast Fourier Transfirm, FFT)과 전력 스펙트럼 밀도 분석(Power Spectrum Density, PSD)방법으로 교감과 부교감 신경 활성도 변화를 관측하였고, 운동 센서로 움직임을 관측하였다. 수신부 시스템은 안드로이드 기반의 자바 어플리케이션으로 스마트 폰에서 구현하였고, 송신부인 이어폰 생체정보 측정모듈로 맥파를 측정하여 상황에 따라 변화하는 자율 신경계의 활성도비율을 확인하였다.

• The Journal of Korean Obstetrics and Gynecology
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• v.30 no.3
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• pp.92-116
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• 2017

Objectives: The purpose of this study were to researched a Korean medicine doctors' recognition about coldness of hands and feet, and developing of korean medicine clinical practice guidelines (CPG) for coldness of hands and feet. Methods: We conducted a questionnaire survey targeting 399 Korean medicine doctors belonging to the Association of Korean Medicine by e-mail and analyzed the answers. Results: 1. 86.86% of the respondents agreed about the necessity of CPG for coldness of hands and feet. 2. 84.2% of respondents wanted coding of Korean Standard Classification of Diseases (KCD) on coldness of hands and feet. 3. To diagnosis a coldness of hands and feet, the respondents used a Subjective symptoms (98.5%), Infrared thermographic imaging device (DITI) (26.32%) Heart rate variablity test (HRV) (17.04%), Thermometer (9.77%), Cold stress test (2.76%) 4. Causing of coldness of hands and feet, the respondents considered a constitution or heredity (84.71%), stress (73.66%), lack of exercise (64.91%), irregular eating habits (51.63%), Cold meals (32.83%), depression (31.33%), etc. 5. Treating coldness of hands and feet, the respondents used a herbal medicine (66.85%), acupuncture (70.7%) Pharmacopuncture (23.85%) and moxibustion (60.08%) for $10.91{\pm}8.03week$. Conclusions: We researched a Korean Medicine doctors' recognition of CPG, clinical diagnosis, treatment on a coldness of hands and feet, and policy they required.