• Progress in Medical Physics
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• v.27 no.1
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• pp.46-53
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• 2016

Periodical calibrations of radiation detectors are important for accurate quality assurance of therapeutic linac. The measuring instruments such as ion-chamber, thermometer, barometer, and survey meter should be calibrated periodically. Period of calibration for these instruments is suggested 6 month to one year in Korea and two years in other countries nowadays. Therefore, the determination of reasonable period for calibration is needed. In this study, we plan to utilize the results of these survey; frequent in use, how to use and stability of instruments, to determine the optimized period of calibration for the instruments in the departments of radiation oncology in Korea based on the ILAC-G24. The SurveyMonkey web-based survey tool was used and the objects of survey were 18 department of radiation oncology in university hospitals, and 15 departments were answered. The 64 questionnaires which supposed to be answered in 50 minutes were classified as the information of candidates, the thermometer, the barometer, the surveymeter, and the ion-chamber. The thermometers and the barometers were not under periodical calibration for more than half of candidates. The periods of calibration of surveymeters were 6 month to 1 year. We expect that the calibration period can be determined based on these survey results.

• Annual Conference on Human and Language Technology
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• 2012.10a
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• pp.195-200
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• 2012

한국어 조사는 다른 외국어에는 대응하는 어휘가 없는 경우가 대부분이기 때문에 외국인이 한국어를 배울때 조사를 가장 어려워한다. 특히, 한국어에서 조사는 문법적 특징을 결정하는 매우 중요한 형태소이며 문장의 뜻을 매우 다르게 바꿀 수 있으므로 올바른 사용이 필수적이다. 본 논문에서는 외국민이 입력한 불완전한 한국어 문장에서 조사를 올바르게 교정하는 방법을 제안한다. 이 방법은 주어진 문장에 대해 한국어 형태소 분석기와 품사 태거를 이용하여 체언과 용언을 추출하고 이를 세종 용언 사전과 체언 사전의 문형 정보를 이용하여 올바른 조사를 부착하고 교정해 준다.

• Journal of Korean Ophthalmic Optics Society
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• v.2 no.1
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• pp.149-154
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• 1997

We investigated the dominant eye of 123 Korean over twenty years old, then examined the refractive correlation of dominant eye, the unaided visual acuity and over-correlation. The results of these investigations are following. 91 persons of the whole number, 74%, have the dominant eye of right. The refractive correlation to the glasses are the high dominant eye. There are many men who are the same in unaided visual acuity. In men, they prefer to have the non-dominant eye but in women, they like better to have the dominant eye. The unaided visual acuity of ametropia, however, prefer to have the non-dominant eye in both men and women. In case of over-correction of an eye, there was affected the response of the other eye over 50% at the same time and the case of over-correction of dominant eye has more number than that of non-dominant eye.

• Journal of dental hygiene science
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• v.13 no.1
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• pp.105-114
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• 2013

The purpose of this study was to offer information to medical institution of specializing in orthodontic patients by surveying the influence of orthodontic patients' perception of treatment according to orthodontic treatment upon satisfaction and recommendation with orthodontic treatment, targeting patients with completion of orthodontics who have experience of having received orthodontic treatment. As a result of SAS ver. 9.1 analysis on what was surveyed from February 2010 to August, the following conclusions were obtained. In comparing perception of treatment on orthodontic treatment according to general characteristics, women compared to men were indicated to be higher (p<0.05) in inconvenience recognition (p<0.05) on orthodontic device and in inconvenience during orthodontic treatment (p<0.05). In perception of treatment on orthodontic treatment, the inconvenience of orthodontic device accounted for 79.3%, thereby having been recognized by the majority of subjects. Even the inconvenience during orthodontic treatment was being recognized by 69.8%. The orthodontic treatment expenses appeared enough to be expected by 61.6%. The frequency of visiting hospital during orthodontic treatment was indicated as saying of having been proper by 72.8%. The period of orthodontic treatment was indicated to be proper as well by 61.2%. Even understanding about treatment contents during orthodontic treatment was indicated to be understood by 62.6%. In the results of correlation among subjects' cooperation with dental treatment, satisfaction with treatment service, recommendation of this clinic, and satisfaction with the convenient facilities, the significantly positive correlation was shown (p<0.05) in all among items in each.

• 대한치과교정학회:학술대회논문집
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• 1998.10a
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• pp.72.2-72.2
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• 1998

• 대한치과교정학회:학술대회논문집
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• 1998.10a
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• pp.78.3-78.3
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• 1998

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.109-113
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• 2009

이 연구는 교정치료중인 환자의 구강건강영향지수(OHIP)와 자아존중감에 영향을 미치는 요인을 파악하기 위해 대구시내에 소재한 교정 전문치과 4곳에서 교정치료를 받고있는 환자 200명을 대상으로 설문지 조사방법을 이용하여 대상자의 일반적 특성 및 교정치료 특성, 구강건강영향지수, 자아존중감을 조사 분석하여 교정치료환자의 구강건강영향지수 및 자아존중감에 영향을 미치는 요인을 분석하였다. 그 결과, OHIP에 영향을 미치는 요인으로는 연령이 낮을수록(P<0.01), 구강건강상태가 좋을수록(P<0.001), 가족의 권유로 교정치료 받는사람이(P<0.05), OHIP에 영향을 주는 요인으로 분석되었으며, 자아존중감에 영향을 미치는 요인으로는 남자가(P<0.05), 미혼이(P<0.01), 수입이 많을수록(P<0.05), 자아존중감에 영향을 주는 요인으로 나타났다.

• The korean journal of orthodontics
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• v.39 no.1
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• pp.36-42
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• 2009

Objective: The purposes of this study were to provide an epidemiologic data base related to the orthodontic treatment need and to know the changing trends about treatment modality of private orthodontic clinics. Methods: Distribution, trends and orthodontic treatment plan of malocclusion patients were investigated in 1,620 consecutive patients who had been visited and examined in 4 private orthodontic clinics located in Seoul from 2003-2006. Results: Percentage of male and female patients was 26.9% and 73.1% respectively Age distribution had shown that percentage of the patients above 13 years was 78.9%, and above 19 years was 59.0%. Average age of whole patients was 20.5 years. With regard to Angle classification, each percentage of Class I, Class II division 1, Class II division 2 and Class III malocclusion was 38.9%, 34.8%, 2.3% and 24.0%. The percentage of extraction cases(00.9%) outnumbered nonextraction cases(39.1%) and 46% of extraction cases were upper and lower 1st premolar extraction cases. Patients who had chose treatment with fixed appliance and orthognathic surgery was 10.2%. Conclusions: Because the high percentage of adult, Class II malocclusion and orthognathic surgery cases in patients of private orthodontic clinics were shown in this study, orthodontic education program and national health policy in Korea need reformation.

• Journal of dental hygiene science
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• v.16 no.1
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• pp.84-92
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• 2016

Cooperation of the patients in orthodontic treatment is an essential element. This study examines the internal and external restriction factors and level of cooperation for orthodontic treatment of adolescent orthodontic treatment patients, and the factors that impart influence on the level of cooperation for orthodontic treatment. 'Form for students' among the indices of internal and external restrictions for orthodontics, which is an adaption of 'Orthodontic Locus of Control Scale' was used as survey tool, and 'Reliability and Stability of the Orthodontic Patient Cooperation Scale' was used as survey tool for the level of cooperation of orthodontic patients. As the result of examination of the effect of internal and external restriction factors on level of cooperation for orthodontic treatment by compensating the general characteristics in the multiple regression analysis, it was found that the level of cooperation for orthodontic treatment is higher for the patients who believe there is strong influence of external restrictions-patents-on the events that determines orthodontic treatment. In order to enhance the level of cooperation for orthodontic treatment of adolescent orthodontic patients, there is a need to assess the relationship between the patient and parents as well as the attitude or psychological state of the patients on orthodontic treatment.

• The korean journal of orthodontics
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• v.25 no.4
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• pp.497-509
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• 1995

With socioeconomic development and change of esthetic recognition, the demand for orthodontic treatment and number of orthodontic patients has been increasing so rapidly. And frequency of malocclusion was changed. So this study was done in an attempt to provide an epidemiologic study so that we can accomodate their orthodontic needs adequately and to obtain the reliable quantitative information regarding the characteristics of orthodontic patients who visited Department of Orthodontics, Seoul National University Hospital from 1985 to 1994. Following results were obtained. 1. The total number of orthodontic patients of SNUDH during 1990-1994 increased in comparing with that of 1985-1989. And it showed that the number of annual patients was increasing trend. 2. The total number of female patients was 1.59 times as high as that of male. It showed that the annual percentage of female patients has been increasing and that of male patients has been decreasing. So demands for orthodontic treatment of malocclusion of female patients were higher than that of male patients. 3. Each total percentage of class I, class II div.1, class II div. 2 and class III was 35.98%, 14.00%, 1.74% and 48.28%. The annual percentage of class I group had been decreasing but it has increased at 1994. However that of Class III group had been increasing until 1991 but it has been decreasing. 4. Each percentage of less than 6 year-old group, D to 8 year-old group, 8 to 12 year-old group, 12 to 18 year-old group and more than 18 year-old group was 2.65%, 8.63%, 32.50%, 27.74% and 28.48%. Annual percentage of 12 to 18 year-old group ( middle & high school students group ) had been decreasing but it has been increasing. However 18 year-old group had been increasing but it has been decreasing. So entrance examination for college and university is an important factor to distribution of age group.