• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.1340-1343
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• 1996

In this study, we developed the drowziness prevention system to detect the driver's drowziness and relieve the driver. A computer vision method was proposed to detect the driver's drowziness. We extracted the eyes and mouth in the face image and tracked the positions from the image sequencies in real time. The eye blink duration and yawning was used as the parameters of drowziness. Wehn the drowziness state of a driver is detected, the driver is refreshed by the scent generator and the alarm. Also, the driver's bio-signal is acquired and analysed the vigilance state.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제40권3호
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• pp.111-116
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• 2014

Objectives: Dislocation of the temporomandibular joint may occur for various reasons. Although different invasive methods have been advocated for its treatment, this study highlights the value of non-invasive treatment options even in chronic cases in a resource-poor environment. Materials and Methods: A seven-year retrospective analysis of all patients managed for temporomandibular joint dislocation in our department was undertaken. Patient demographics, risk factors associated with temporomandibular joint dislocation and treatment modalities were retrieved from patient records. Results: In all, 26 patients were managed over a seven-year period. Males accounted for 62% of the patients, and yawning was the most frequent etiological factor. Conservative treatment methods were used successfully in 86.4% of the patients managed. Two (66.7%) of the three patients who needed surgical treatment developed complications, while only one (5.3%) patient who was managed conservatively developed complications. Conclusion: Temporomandibular joint dislocation appears to be associated with male sex, middle age, yawning, and low socio-economic status, although these observed relationships were not statistically significant. Non-invasive methods remain an effective treatment option in this environment in view of the low socio-economic status of the patients affected.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 춘계학술대회
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• pp.56-59
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• 1996

The purpose of this study is to identify the cause of driver's drowsiness and to get information about driver's drowsiness from facial image using computer vision. We measured the driver's movements of a head and shoulders in the highway arid street. We also measured the eye blink duration and yawning duration of normal and drowsy drivers. from the results, we confirmed that the measurement of eye blink and yawning might be a way of drowsy detection.

• 대한의용생체공학회:의공학회지
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• 제18권3호
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• pp.315-323
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• 1997

Driving is a complex vigilance task that includes improper lookout, excessive speed and inattention. The primary objective of this research is to detect driver drowsiness so that the driver can be alerted to an impending traffic accident in performance. We developed the automatic detection and warning system during drowsy driving. A drowsiness detection system must be able to monitor driver status and detect the detrimental changes of a driver performance. Eyeblink has been found to be a reliable factor of drowsiness detection in earlier studies. As an additional parameter, we also considered the yawning which often occurs in a low vigilance state and predicts the drowsy state. We used a computer vision method to extract the eyeblink and yawning in the face image sequences. When the drowsy state was detected, the driver was refreshed by alarming device and menthol scent generator after deciding the warning level by fuzzy logic. For the evaluation of our system, we measured the physiological parameters such as EOG and EEG. The results indicated that it is possible to detect and alert the driver drowsiness temporarily or continuously by using our system.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 추계학술대회
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• pp.90-94
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• 1996

We studied the problem of driver's low vigilance state which is related to the one reason of traffic accidents. In this paper, we developed the drowsiness warning system for a drowsy driver. To extract the eyes and mouth from the driver's facial image in real time, a computer vision method was used. The eye blink duration and yawning were used as measurement parameters of drowsiness detection. When the drowsy state of a driver was detected, the driver was refreshed by the scent generator and the alarm. Also, the driver's bio-signal was acquired and analyzed to measure the vigilance state.

• 의학교육논단
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• 제20권2호
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• pp.112-117
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• 2018

Attending the operation room is an essential part of surgical clerkships. Syncope or presyncopal attacks in the operation room may negatively affect students' learning and career development. This study set out to identify the prevalence of syncope and presyncopal attacks in the operation room during medical students' surgical clerkships. Data from 420 medical students (303 men and 117 women) in their 3rd year of clerkship were collected between 2014 and 2017. An anonymous questionnaire was distributed to assess the prevalence and degree of syncope and presyncopal symptoms. A total of 27% of the respondents had experienced syncope or presyncopal symptoms, 49.6% of the female students and 18.8% of the male students (p<0.001). Fifty students (43.5%) had been attending as observers at the time of the syncopal attack, while 65 students (56.5%) had been participating as assistants. Thirty-four students (29.6%) had recently eaten at the time of the syncopal attack, while 81 students (70.4%) had not recently eaten. Prodromal symptoms included the urge to sit down (21.2%), sweating (19.3%), nausea (16.9%), a feeling of warmth (13.3%), darkened vision (12.6%), yawning (11.7%), palpitation (11.0%), ear fullness (10.2%), black spots in one's vision (7.6%), and hyperventilation (7.1%). This study showed the prevalence of syncope and presyncopal symptoms in the operation room during surgical clerkships. For students' safety and effective clerkship learning, thorough proactive education on syncopal attacks is required.

• 한국학교보건학회지
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• 제10권2호
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• pp.169-178
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• 1997

In order to investigate the complaint rates of subjective fatigue symptoms and study the relationship between them and body type, health awareness in middle school students, we carried out a survey of 1,209 students (654 boy students and 555 girl students) at a middle school in Taejon City by a self-recorded questionnaire. The survey was conducted in June, 1997. The results obtained were as follows: 1. Among complaints of fatigue, "feel like lying down" was the highest, followed by "feel anxious about things", "feel drowsy", "yawning a lot", "eye strain" and "whole body feels tired" in descending order. 2. In the average weighted score of fatigue complaint, dullness and sleepiness (I) was the highest, followed by a difficulty in concentration (II) and bodily projection of fatigue (III) in descending order. Fatigue seems to create mental stress rather than physical burdens. 3. In the classification of body type based on the $R\ddot{o}hrer$ index, the obesity type (145 and above) was 11.0%, standard type (110~144) was 64.7% and leptosomic type (l09 and below) was 24.3%. Comparison between both sexes revealed that the rate of obesity and leptosomic types were significantly higher in boy students than in girl students. 4. In terms body type awareness, the statistics are the following: those who consider themselves to be standard type, 44.3%, slightly obese 24.5%, leptosomic, 23.5% and obese 7.8%. However, the level of obesity awareness was significantly higher in girl students than in boy students. 5. As for health awareness, 36.5% considered themselves healthy, 5.4% generally healthy and 10.1% a little unhealthy, but the level of unhealthy awareness was higher in girl students than in boy students. 6. In the relationship between body type and health awareness, most students thought that they were obese in spite of their standard body type. Also, many students who were obese and leptosomic tended to consider themselves to be a little unhealthy. 7. The more the students were obese or felt unhealthy, the more the average weighted score of fatigue complaints was high.

• 한국정보통신학회논문지
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• 제26권6호
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• pp.859-864
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• 2022

매년 교통사고의 가장 큰 원인으로 손꼽히는 졸음운전은 운전자의 수면 부족, 산소 부족, 긴장감의 저하, 신체의 피로 등과 같은 다양한 요인을 동반한다. 졸음 유무를 확인하는 일반적인 방법으로 운전자의 표정과 주행패턴을 파악하는 방법, 심전도, 산소포화도, 뇌파와 같은 생체신호를 분석하는 방법들이 연구되고 있다. 본 논문은 영상을 검출하는 딥러닝 모델과 생체 신호 측정 기술을 이용한 운전자 피로 감지 시스템을 제안한다. 제안 방법은 일차적으로 딥러닝을 이용하여 운전자의 눈 모양과 하품 유무, 졸음으로 예상되는 신체 동작을 파악하여 졸음 상태를 감지한다. 이차적으로 맥파 신호와 체온을 이용하여 운전자의 피로 상태를 파악하여 시스템의 정확도를 높이도록 설계하였다. 실험 결과, 실시간 영상에서 운전자의 졸음 유무 판별이 안정적으로 가능하였으며 각성상태와 졸음 상태에서의 분당 심박수와 체온을 비교하여 본 연구의 타당성을 확인할 수 있었다.

• 만화애니메이션 연구
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• 통권37호
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• pp.463-489
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• 2014

그에게 쏟아진 거의 만장일치에 가까운 찬사에도 불구하고, 연상호의 애니메이션 작품세계에 대한 본격적인 논의는 아직 제대로 된 형태를 갖추지 못하고 있다. 산발적인 몇몇 리뷰들을 제외하면 진지한 접근의 시도를 찾아보기 힘든 상황인 것이다. 이 깊은 골을 메우려는 시도로서 본 논문은 그의 작품들이 의미 있는 전체(oeuvre)로 간주되어야 한다고 주장한다. 그의 두 장편 애니메이션인 <돼지의 왕>과 <사이비>에 집중하되, 그들이 그의 단편 작품들과 맺는 미묘한 관계들에도 주목하면서, 나는 그의 작품이 현대 한국사회와의 관계 속에서 얼마나 '급진적'인지, 혹은- radical이라는 말의 어원 그대로 '뿌리'에 닿는다는 의미에서- '근원적'인 지를 보여줄 것이다. 두 작품 간의 연속성을 우회하거나 제대로 논의하지 않는 일반적인 독해들과 달리, 나는 그 둘이 주목할 만한 차이들에도 불구하고 공명하는 독특한 방식에 주목하려 한다. 단도직입적으로 말해 서사의 중심에서 그의 작품들은 '연대(solidarity)'의 문제, 보다 정확하게 말해 '비참한 이들(abjected people) 간의 연대의 결핍/과잉'이라는 문제를 중심으로 회전한다. 나아가, 어쩌면 더욱 중요하게도, 나는 어쩌면 그저 주제적 차원이라 할 수 있을 이러한 문제들이 그의 애니메이션 작품들 속에서, 내가 '바닥없는 표면/표면의 심연(abyssal surface)'이라 이름붙인 형식적 차원으로 표면화되고 있는 지를 드러낼 것이다. 서사는 훌륭하나 '애니메이션' 작품으로서의 정체성을 인정하기는 어렵다는 식의, 상찬을 가장한 비난- 혹은 오독-과 달리, 나는 연상호의 작품들이 '비참한 이들' 간에 드러나는 신뢰의 결핍/과잉을 애니메이션으로서, 즉 그 뒤에 서로에 대한 '바닥없는 불신/신뢰'가 숨어있는 불길하고 피상적인 표면을 육화한다고 주장할 것이다. 연상호의 애니메이션은 정확하게 이런 중의적인 의미에서, 즉 주제적인 차원에서의 사회의 뿌리와 표현 양식 차원에서의 애니메이션의 근본을 건드린다는 이중적인 의미에서 근본적(radical)이다.

• 치위생과학회지
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• 제14권2호
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• pp.207-213
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• 2014

본 연구는 국민건강영양조사 5기(2010~2012년) 원시자료를 이용하여 사회경제적 수준에 따른 주관적 구강건강 상태의 차이와 관련성을 분석하기 위하여 실시되었다. 주관적 구강건강 수준을 '좋다'와 '나쁘다'로 분류하여 사회경제적 수준이 건강불평등에 미치는 요인을 분해하여 다음과 같은 결과를 얻었다. 주관적 구강건강 상태는 남자에 비해 여자가 구강건강을 좋지 않다고 인식하는 것으로 나타났으며, 연령 증가 시 본인의 구강건강을 나쁘게 인식하는 것으로 분석되었다. 또한 교육수준이 낮을수록, 가구소득이 낮을수록 주관적 구강건강상태를 나쁘다고 자가 평가하는 경향을 보였다. 로지스틱회귀분석을 활용하여 주관적 구강건강 상태에 대한 영향 요인을 분석한 결과 사회계층에 따른 건강상의 차이는 남자에 비해서 여자에서 자신의 구강건강수준을 더 건강하게 인지할 확률이 높아지고 있으며 교육수준이 높을수록 건강하게 인지할 가능성이 높았다. 소득수준에 따른 주관적 건강수준에 대한 인식의 격차는 소득증가에 따라 더 심화되는 것으로 나타났다. 이상의 연구결과를 살펴보면 구강건강에 사회계층별 불평등은 존재하는 것으로 나타났다. 전체 국민의 구강건강을 증진하는 사업은 물론 사회 양극화에 따른 사회계층별 구강건강의 격차를 해소하기 위해 상대적으로 격차가 큰 취약계층에 적절한 정책적 지원이 고려되어야 할 것으로 사료된다.