• Proceedings of the KOR-BRONCHOESO Conference
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• 1977.06a
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• pp.6.1-6
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• 1977

Among the various audiometric test batteries, pure tone and speech audiometry was carried as routine. During the past 20 years, there have been works on speech word list for Korean language. As a preliminary work for standardization of Korean speech word list, the authors are intended to study on the factors of test methods with these proposal speech word lists. Now, authors has studied as followings methods and materials and the results were obtained as followings. A. Materials and Methods a. Word List 1. Paik Chun Kee (Paik) 2. Soh Jin Myoung (Soh) 3. Cynn Kyu Shik (Cynn) 4. Lee Jong Dam (Lee) 5. Hahm Tae Young (Hahm) b. Test Method 1. ascending 2. descending c. Test Material 1. live voice 2. Recorded male voice 3. Recorded female voice B. Results 1. Score of ascending method was better result than descending method. 2. Speech reception threshold and discrimination score were better in recorded female voice, live voice and recorded male voice in that order. 3. Speech reception thresholds among tested word lists were Hahm, Lee, Soh, Cynn and Paik in that order. 4. Discrimination score was highest with Cynn and Lee, Soh, Hahm, Paik in that order.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1987.05a
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• pp.10.1-10
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• 1987

표준청각검사와 자기청력검사는 청력역치의 측정으로 난청의 종류를 구별하고 누가현상유무를 판정하며, 사청검사를 할 수 있는 공통점을 갖고 있다. 그러나 표준청력검사는 동일강도의 음을 부여하는 대신 자기청력검사는 음의 증강 및 감약이 계속되는 음을 부여하는 점이 양자의 상이점이다. 이런 차이로 인해 자기청력검사에는 일과성 역치 상승(temporary threshold shift)현상이 일어나 청력 역치가 높을 수 있다. 양자의 역치차가 각 청력군별로 어느 정도차이가 있는가를 관찰할 목적으로 정상청력군 50명 (100이), 전음성 난청군 41명(50이), 감각신경성 난청군 38명(50이)을 대상으로 표준 및 자기청력검사의 기도측정을 실시하여 양 검사의 차를 구하고 그 결과를 다음과 같이 요약하였다. 1) 정상청력군과 전음성 및 감각신경성 난청군 모두 자기역치가 표준역치 보다 높게 측정되는 경향으로 난청군에서 더욱 높게 측정되었다. 그러나 자기역치가 낮은 예도 많았다. 2) 양 검사의 일치범위를 $\pm$10㏈로 하면 정상 청력군은 94%, 전음성 난청군 85%, 감각신경성 난청군 79%에서 양 검사가 일치하였다. 3) 자기역치에서 표준역치를 추정할 수 있는 범위는 정상군에서는 5~-l0 ㏈, 난청군에서는 5~-15 ㏈ 의 변동폭이었다. 4) 양 검사의 역치차가 $\pm$20 ㏈이상인 예도 많아 양 검사는 서로 독립된 검사라고 생각되었다.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.1
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• pp.15-20
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• 2008

Purpose: To study on the confidence of dry eye diagnosis methods which need to prescribe contact lens. Methods: Non-invasive tear film break-up time (NIBUT) and tear film break-up time (TBUT) were measured in forty healthy subjects in their 20s, and then the subjects were classified into normal eye and dry eye. The results of McMonnies questionnaire, tear prism height measurement, Hardtack test, blink rate measurement and Schirmer test were compared with the results of NIBUT and TBUT. Results: The results of NIBUT and TBUT were as follows; 20 subjects had normal eyes, 10 subjects had dry eyes in both NIBUT and TBUT, and 10 subjects showed different results. In McMonnies questionnaire, the score of normal eye group averaged 8.2 and that of dry eye group averaged 18.5, which showed statistically significant difference. Furthermore, 100% of normal eye group classified by the results of NIBUT and TBUT corresponded with the result of McMonnies questionnaire and 90% of dry eye group showed the correspondence. Tear prism height of normal eye group averaged 0.32 mm and that of dry eye group averaged 0.23 mm, which were significantly different. Hardtack test, blink rate measurement and Schirmer test without local anesthesia showed no statistically significant difference between normal eye group and dry eye group. Conclusions: On dry eye diagnosis methods, the results of McMonnies questionnaire and tear prism height measurement had close correlation with the results of NIBUT and TBUT.

• Journal of the Korean Society of Radiology
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• v.18 no.2
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• pp.171-177
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• 2024

In this study, two general X-ray device, CT, and MRI inspection devices were selected from general hospitals in the Daejeon area and an experiment was conducted to predict the level of infection by measuring the surface contamination of the inspection devices at different times and to use it as basic data for infection prevention. As a result, the surface contamination level by time zone for general X-ray devices and MRI examination devices was in the order of 13H > 8H > 16H, and for CT examination devices, it was 13H > 16H > 8H, which appeared to be influenced by the number of tests. In addition, the surface contamination results for each part of the test device showed that the highest ATP contamination value was found on the stand bucky handle for the general X-ray device, the headrest for the CT examination device, and the operation switch for the MRI examination device, which was closely related to the number of contacts. As a result of comparing before and after disinfection, all devices showed a significant decrease after disinfection. Based on the results of the experiment, it is believed that it can be used as basic data to identify the level of contamination in radiology laboratories and prevent infectious diseases.

• Journal of the Korean Society of Radiology
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• v.18 no.5
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• pp.483-490
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• 2024

Existing Intra-oral radiography examinations have problems with information on the angle of incidence used in textbook and those used in the field, and radiologic examinations result vary depending on the operator's skill. Therefore, this study aimed to suggest an ideal angle of incidence for radiological examination so that the proximal areas between teeth are clearly visible without overlapping. First, patient's dental arch in the exact center, and the angle of incidence of the point where the teeth did not overlap was measured using a protractor tool in program. Second, based on the calculated results, we surveyed patient phantoms for student practice during Intra-oral radiography examination and conducted a survey based on qualitative evaluation using a 5-point Likert scale.When comparing the average value obtained by measuring actual patient data and the angle specified in the existing reference book, there is a statistically significant difference in the average between the two groups at p < 0.05 in the proximal area of all teeth, and even if the gender and age group are different, there is a significant difference. Because it did not deviate from the scope, we were able to obtain results that could be sufficiently presented as guidelines. In addition, in a qualitative evaluation based on the images presented by applying the actual measured data to the phantom, images were obtained in which the adjacent surfaces of teeth do not overlap. In conclusion, this study proposes guidelines for the angle of incidence during Intra-Oral Radiography examination to reduce cone-cut images or images with overlapping proximal area and prevent repeat.

• Journal of the Korean Society for Nondestructive Testing
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• v.32 no.2
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• pp.185-191
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• 2012

Typically, a wedge is involved to generate effectively high inspection angle in pipe weld inspection using phased array ultrasonic technique. But the usage of this wedge for weld or access limited area can cause coverage limitation for the examination volume because of the wedge front length. Therefore, the shear wave phased array probe which can generate high inspection angle without wedge is essentially necessary. In this paper, the shear wave phased array ultrasonic probe which can generate high inspection angle designed by modeling and manufactured from the modelling result. And this shear wave probe tested whether it can detect and sizing for EDM test block that contains various depth. As results, the experimental results show that the designed shear wave phased array probe can detect and size with reliable accuracy. Therefore if this phased array probe apply in field inspection, it is expected that it show more reliable inspection result for plant structure having access limitation.

• Journal of Radiation Protection and Research
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• v.29 no.1
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• pp.57-63
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• 2004

As a part of In-service Inspection works in a nuclear power plant, Eddy Current Testing through all the outage of nuclear power plants has been controlled by the radiation management. From the case study about the periodical ECT work, the exposed dose rate of worker has announced over the organized dose rate before the radiation work, it affects the personnel exposed dose management and radiation work permit issue. It is not easy to get some information about ECT related working hours, scope of work and how many workers to forecast the radiation working and the predict dose exposure. It should be need the data accumulation about ECT related radiation work to prepare the ALARA achievement and the radiation work plan for dose mitigation. We can discuss a few information about ECT related radiation working issue for the application of predict dose exposure on this paper.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.11
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• pp.1384-1390
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• 2019

This paper proposes a technological solution for improving the recognition direction of target objects for automatic vision inspection by machine vision. This paper proposes a technological solution for improving the recognition direction of target objects for automatic vision inspection by machine vision. This enables the automatic machine vision inspection to detect the image of the inspection object regardless of the position and orientation of the object, eliminating the need for a separate inspection jig and improving the automation level of the inspection process. This study develops the technology and method that can be applied to the wire harness manufacturing process as the inspection object and present the result of real system. The results of the system implementation was evaluated by the accredited institution. This includes successful measurement in the accuracy, detection recognition, reproducibility and positioning success rate, and achievement the goal in ten kinds of color discrimination ability, inspection time within one second and four automatic mode setting, etc.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.148-151
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• 2015

초음파 검사를 이용한 지방간의 등급을 분류하는 진단 결과는 검사자의 주관적 판단으로 시행하므로 검사자 간의 불일치가 발생하여 초음파 검사의 진단 결과에 영향을 미칠 수 있다. 따라서 본 논문에서는 환자와 검사자에게 지방간 등급을 보다 정확하게 진단하기 위한 전단계로서 초음파 영상에서 간과 신장 영역을 추출하는 방법을 제안한다. 제안된 방법을 다양한 초음파 영상에 적용한 결과, 간과 신장 영역이 비교적 정확히 추출되는 것을 확인할 수 있었다. 따라서 제안된 방법이 초음파 영상에서 지방간을 분석하는데 적용할 수 있다.

• Clinical and Experimental Pediatrics
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• v.51 no.5
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• pp.506-511
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• 2008

Purpose : The results of pulmonary function test (PFT) in children are variable according to the patient's cooperation and comprehensiveness. This study has intended to figure out the effectiveness of pre-education and training with balloons on PFT in children. Methods : One hundred six children mean aged $9.35{\pm}2.92\;years$ were tested. All participants performed PFT twice in 30 minutes intervals. First PFT were performed after usual instruction and second PFT were performed according to randomly classified grouping; Group 1 : repeat PFT after training with balloons, Group 2 : repeat PFT after training and education, both, Group 3 : repeat PFT after education about objects and necessities of pulmonary function test, Group 4 : repeat PFT without any education and training. Results : There were no difference statistically on the results of percent of predicted $FEV_1$, $FEV_1/FVC$, $FEF_{25-75%}$ and PEFR in Group 1, 2 and 4 patients. In some cases, the average is decreased with repeated PFT. At the case of repeated PFT after education, the average of percent of predicted $FEV_1$, $FEV_1/FVC$, $FEF_{25-75%}$ and PEFR is increased. There was statistically significant difference on the value of $FEV_1$, $FEF_{25-75%}$ and PEFR between first and second PFT in Group 3. Conclusion : Training with balloons before PFT causes fatigueness and lowers concentration. Understanding of PFT makes results better than training. Therefore, enough explanation and education about PFT before examination is most effective for appropriate PFT in children.