• Journal of Korean Ophthalmic Optics Society
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• v.16 no.1
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• pp.83-90
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• 2011

Purpose: This study aimed to compare and assess whether there was a relation between self-reported symptom and stereopsis in viewing an anaglyph 3D and a general 2D image. Methods: Seventy subjects (38 males, 32 females) were students ranging in age from 20 to 30 years. Subjects' symptoms were investigated by a questionnaire after viewing the 2D image and the anaglyph 3D image using red-green glasses for 30 minutes. Titmus circles and TNO stereopsis tests were performed before and after the images. A correlation between symptom and stereopsis was evaluated. Results: Both ocular and nonocular symptom in viewing 3D image were higher than those in 2D image. Titmus circles stereopsises using polarized filters were not changed before and after viewing images, but TNO stereopsises using color filters such as red-green glasses were increased after viewing 3D image. Ocular symptom and TNO stereopsis were increased after viewing 3D image, and there was a good correlation between them (r=0.605). Conclusions: Better stereopsises before viewing 3D are relatively lower ocular symptoms in viewing 3D image. But symptoms are increased in viewing anaglyph 3D image for a short-time and improvement of TNO steropsis is poorly associated with the relief of ocular symptoms. This tendency seems to be related with an adaptation to anaglyph 3D image with red-green glasses.

• Korean Journal of Cognitive Science
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• v.25 no.3
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• pp.259-276
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• 2014

Artists such as Duchamp and Balla tried to portray moving objects on static canvases by superimposing snapshots of moving objects. Previously, our group showed the influence of prior experience on brain responses within a motion-sensitive area MT+ to abstr act paintings with or without implied motion. In the present study, we went further to investigate whether the differential MT+activation between observers is originated from differential eye movement patterns. Prior experience was defined operationally with major in art. In addition, we examined whether perceiver's awareness of artist's intention concerning the implied motion, as well as expertise in art, affects the way he/she views the artwork. Results showed that the number and the duration of fixation on the abstract paintings tended to differ between participants based on art major. The awareness of artist's intention was not related to such differences. In contrast, observers' awareness of artist's intention of implying motion affected eye movement patterns in specific regions of the abstract paintings where the motion was portrayed. In other words, observers with awareness focused more on the parts of paintings portraying motion and moved their eyes in the direction corresponding to the direction of moving objects than observers without awareness. Expertise was not related to such specific eye movement patterns. The present study implies that art expertise and awareness of artist's intention play differential roles in observers' perception of paintings with implied motion. Namely, it suggests that expertise is related to the overall perception of paintings, while awareness of implied motion is related to perception of the specific spatial information in those paintings.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.10
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• pp.4484-4492
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• 2011

The purpose of this study was to analyze dental laboratory's self health recognition level and health behavior level and to examine its correlation. 250 dental technicians in Seoul, Incheon, and Jeonbuk area were selected. Survey was carried out from October 11, 2010 to November 25, 2010 by using self-administered questionnaire. The following are the analytical results in the collected data. The average in the self- health recognition was indicated to be high with 2.83, The average of health behavior was indicated to be high with 2.76. As for correlation between self health recognition and health behavior, most of variables were indicated to have reverse correlation, it was concluded that higher health behavior likely led to lower self health recognition. From the result of this study, the work environment of dental technician must be improved and do more Practice of Health Behavior to improve and maintain their health.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.984-987
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• 2010

본 연구는 병원 종사자들의 작업관련 자각증상 호소율의 요인들을 파악하고자 시도되었다. 자료수집은 2010년 5월 18일부터 6월 18일까지 서울 소재 2개 종합병원 종사자 157명을 대상으로 설문조사를 하였다. 연구결과 첫째, 작업관련 자각증상 호소여부는 허리의 증상호소자가 평균 19.53점으로 비증상호소자의 평균 13.06점보다 유의하게 높았다(t=9.684, p=0.007) 둘째, 운동을 안하는 군에 비해 운동을 불규칙적으로 하는 군의 자각증상 호소률은 2.18배(OR=2.183, 95%, Cl=1.362-7.420)로 유의하게 높아지는 것으로 나타났다. 따라서 작업관련 증상관리를 위한 건강증진 프로그램 개발시 이에 대한 총체적인 반영이 필요할 것으로 본다.

• Journal of dental hygiene science
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• v.12 no.4
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• pp.443-450
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• 2012

In this study, a survey was conducted to check the health status and health-related behavior according to the subjective oral malodor of some university students targeting 1,490 students who are attending N university in Cheonan. Based on the result to confirm the awareness of oral malodor and systemic diseases status, there were many cases to be realized such as sinus infection, chronic rhinitis, asthma, gastrointestinal disorders and xerostama among the people who think that they have bad breath, not the people who think that they don't have bad breath (p<.05). Based on the result to confirm the subjective oral health condition according to awareness of oral malodor status, it was shown that there were more respondents who have some oral conditions such as 'there are tooth to be treated', 'there is food stuck between tooth' and 'the gums are often swollen' among the people who realize that they have bad breath, not the people who think that they don't have bad breath (p<.05). It was shown that there were more cases to be brushed teeth everyday among the people who realize that they don't have bad breath than the people who think that they have bad breath (p<.05) and there were more cases to be used dental floss and to be brushed tongue everyday among the people who think that they don't have bad breath (p<.01).

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.863-866
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• 2010

병원 근로자의 VDT 자각 증상에 대한 선행연구를 보면 대부분이 간호사 관련 직종으로 한정되어 있고, 방사선사에 대한 연구는 수행되지 않았다. 본 연구는 2009년 10월 15일부터 11월 2일까지 대전광역시에 소재하고 있는 종합병원에 VDT 작업을 시행하는 보험심사, 원무, 의무기록, 전산, 행정부서 근무자와 방사선사를 대상으로 구조화된 설문지를 활용하여 분석하였다. VDT 증후군 자각 증상 점수를 종속변수로 한 다중선형회귀 분석 결과 관련요인으로 안관련 증상에 영향을 미치는 요인을 보면 성별, 건강염려, 일상생활 방해이며, 전신증상은 운동, 스트레스, 건강상태 인지 관련, 근골격 증상에서는 임상경력 6-10년, 대인관계, 건강상태 인지 관련 건강염려와 일상생활 방해로 나타났으며, 통계적으로 유의한 차이를 보였다. 피부 증상으로는 연령 20-29세, 결혼여부, 식습관, 건강상태 인지 관련 소화 정도와 일상생활 방해로 나타났으며, 심리 증상으로는 성별, 결혼 여부, 스트레스, 소화 정도, 일상생활 방해로 나타났으며, 통계적으로 유의한 차이를 보였다. 타부서 근로자와 방사선사의 VDT 증후군 자각점수 차이가 크게 나타나지 않았으며, 이는 방사선사의 업무가 VDT 환경으로 변함으로써 VDT 증후군 자각 증상이 일어날 수 있다는 것을 나타내는 것이다. 이는 정기적인 순환근무를 시행함으로써 VDT 환경에 지속적인 노출을 피하는 것이 예방 대책이라 할 수 있다.

• Journal of radiological science and technology
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• v.34 no.4
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• pp.297-303
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• 2011

The existing studies of VDT syndrome have been researched only about for nurse groups without radiological technologists. The target of this study was workers who perform VDT task in general hospital placed in Daejun City such as insurance judgement, patient affairs, medical record management, medical computing service, hospital administration, and radiological sections. This study was conducted at October 15, 2009 to November 2, 2009 using structured questionnaire. Results of group A (age 20-29, less than 5 years experience at clinical site, normal staff, and unmarried group) showed significant skin and psychological conditions among recognition symptoms of VDT syndrome. Group B (age 30-39, 6-10 years experience at clinical site, managing staff, and married group) tends to be similar at orbital, whole body and muscles' frame response among recognition symptoms of VDT syndrome. Results of "Multiple Linear Regression" with dependent variable that is scores of recognition symptoms of VDT syndrome are as follows. The factors which influences for orbital-related problem is gender, health cares and obstacles during daily life. The factors which influences for whole body-related is exercise, stress and recognition for health condition and the factors which influences muscles' frame-related is 6-10 years experience at clinical site, human relationship, health cares and obstacles during daily life. These are proved to be similar by statistic analysis. There is small difference at recognition symptom of VDT syndrome between the radiological technologist and other groups in general hospital. Yet, as the working circumstance of radiological technologist gradually changes to VDT environment, the recognition symptom of VDT syndrome became conscious. This can be prevented by regular job rotation, which will escape the continuous repetition of working pattern.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.5
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• pp.2156-2169
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• 2012

This study was performed to find out the relationship between farmer's syndrome and self-conscious fatigue symptoms in farmers of suburban area. The questionnaire was prepared to survey the socio-demographic characteristics, health-related behaviors, farming activities, farmer's syndrome, and self-conscious fatigue symptoms of the farmers, and the survey was carried out from April 1 to June 30, 2011 by interviewing 296 farmers residing suburban area of Daejeon city. As a results, the ratio of farmers who had positive farmer's syndrome, doubtful syndrome, and no syndrome were 34.1%, 47.6%, and 18.2%, respectively. The farmer's syndrome was positively correlated with the self-conscious fatigue symptoms, and farmers with self-conscious fatigue symptoms in high risk group were at higher risk of having farmer's syndrome. The results of hierarchic multiple regression analysis indicated that sex, education, health, and self-conscious fatigue symptom were correlated with the farmer's syndrome. Among the affective factors variables, independently self-conscious fatigue symptom was the most influential. As a conclusion, the occurrence of farmer's syndrome was influenced by the socio-demographic characteristics, health-related behaviors, and self-conscious fatigue symptoms of the farmers. Especially, self-conscious fatigue symptom was independently influenced the occurrence of farmer's syndrome.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.45 no.3
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• pp.59-67
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• 2008

Due to the fast increase in cellular phone users, public interest on health effect of electromagnetic fields(EMFs) by cellular phonos is gradually increasing. Some EHS(electromagnetic hypersensitivity) patients complain of psycho-neurophysiological symptoms such as headaches, insomnia, memory loss resulting from RF radiation by CDMA cellular phones. However, EHS is difficult to diagnose and depends on the individual's subjective judgement. And we don't know clearly if the cause of EHS is uneasiness or real exposure. There have been various EHS volunteer studies on heart rate, blood pressure and subjective symptoms using GSM phones. But there are few studies on experimental case-control study investigating physiological parameters, subjective symptoms, and perception of EMFs. In this study, two volunteer groups of 17 self-declared EHS and 19 controls were exposed to both sham and real RF exposure by CDMA cellular phones for half an hour each. We investigated not only the physiological parameters such as heart rates, respiration rates and HRVs(hear rate variability), but also the perception of EMFs and subjective symptoms. As the results, EMF exposure did not have any effects on the subjective symptoms or physiological parameters for both groups. For the EMF perception, there was no evidence that EHS group perceived the EMFs correctly than the control group.

• Journal of Korean Ophthalmic Optics Society
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• v.21 no.1
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• pp.1-10
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• 2016

Purpose: The study was aimed to suggest the most effective color of the tinted lenses by evaluating the effect of the prescription with tinted lenses on the visual quality of the elderly at the age of the sixty or more. Methods: The visual acuity of fifty subjects at the age of sixty or more (17 males, 33 females with the averaged age of $71.0{\pm}6.3$) were corrected to have the visual acuity at a far distance of 0.5 or more using a trial lens frame, and non-tinted, brown-tinted, and gray-tinted lenses were randomly applied on the trial frame. The minimum legibility and minimum separability were measured at a far distance in the aspect of the visual acuity and calculated as LogMAR and then, the visual acuity was compared. The stereopsis and contrast sensitivity were also estimated at a near distance in the aspect of the visual function. The participants' preference for tinted lenses and their subjective symptoms of the visual perception and the movement were further surveyed. Results: The best minimum legibility and minimum separability was shown when wearing non-tinted lenses, and brown-tinted and gray-tinted lenses were in the next. The stereopsis and the contrast sensitivity at a near distance and the visual perception was the best when wearing brown-tinted lenses. It was surveyed that the subjective discomfort was the biggest when wearing gray-tinted lenses, and brown-tinted lenses were the best in the aspect of the subjective preference. Conclusions: As the result of this study, it was revealed that the visual acuity and visual function could be improved by the use of tinted ophthalmic lenses however, its change of visual acuity and visual function was not completely correlated with the subjective satisfaction. Therefore, the appropriate color of ophthalmic lenses should be selected in accordance with the individual visual perception and the main vision lifestyle in the elderly generation. From the present study, the use of non- or brown-tinted lens and brown- or gray-tinted lens can be recommended for distance work and near work, respectively, in the elderly generation under the illumination of about 1,000 lux.