http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
윤동희,천보영 대한안과학회 2018 Korean Journal of Ophthalmology Vol.32 No.1
To compare the thickness of superior, temporal, inferior, and nasal macula and foveal thickness andvolume in patients with anisometropic amblyopia prior to and after successful occlusion therapy using opticalcoherence tomography (OCT) measurement. Methods: Data were collected prospectively on 30 patients with unilateral anisometropic amblyopia fromDecember 2006 to August 2007. All patients had anisometropia of 2.0 diopters or more. OCT scans wereobtained for all patients at diagnosis. Occlusion therapy was then prescribed and OCT scans were obtainedagain at the time of successful occlusion therapy (defined as interocular difference of <0.1 log units). TheStratus OCT-3 was used to measure fovea thickness and volume and the thickness of superior, temporal,inferior, and nasal macula (within a diameter of 3 mm). Results: Of 30 patients, 22 (mean age of 5.8 years) had successful resolution of amblyopia. The mean durationof occlusion was 11.24 months and mean best-corrected visual acuity at diagnosis was 0.35 ± 0.12 logarithmof the minimum angle of resolution. The mean thicknesses of the superior, temporal, inferior, and nasalmacula prior to and after occlusion were not significantly different (p > 0.05). However, mean foveal volumeprior to occlusion therapy (0.15 ± 0.02 mm3) decreased after occlusion (0.14 ± 0.01 mm3) with statistical significance(Wilcoxon signed rank test, p = 0.025). Conclusions: There was a meaningful decrease in foveal volume in patients with anisometropic amblyopia aftersuccessful occlusion therapy. Whether this decrease relates to visual improvement of the amblyopic eyeremains to be determined. Key Words: Anisometropic amblyopia, Foveal
Design of a generator control system for small nuclear distributed generation
윤동희,장길수 대한전기학회 2011 Journal of Electrical Engineering & Technology Vol.6 No.3
Small-scale reactors have recently attracted attention as a potential power generation source for the future. The Regional Energy Research Institute for Next Generation is currently developing a small-scale reactor called Regional Energy rX 10 MVA (REX-10). The current paper deals with a power system to be used with small-scale reactors for multi-purpose regional energy systems. This small nuclear system can supply electric and thermal energy like a co-generation system. The electrical model of the REX-10 has been developed as a part of the SCADA system. REX-10’s dynamic and electromagnetic performance on the power system is analyzed. Simulations are carried out on a test system based on Ulleung Island’s power system to validate REX-10 availability on a power system. RSCAD/RTDS and PSS/E software tools are used for the simulation.
협동 로봇 모션 결함 데이터셋 구축을 위한 비전 기반 위치 편차 모의 결함 주입 방법
윤동희,유동연,이정원 한국정보과학회 2023 정보과학회논문지 Vol.50 No.9
The data-based fault detection method, which collects data from internal and external sensors in real-time and predicts fault, is being applied to collaborative robots, which are key facilities in smart factories. The data-based fault detection method requires a large amount of data for learning, and in particular, a large amount of data labeled as a fault state is essential. However, it is difficult to obtain large amounts of actual fault data in industrial settings. Therefore, in this study, the output of the collaborative robot fault state based on a vision sensor was analyzed and compared with the output of the normal state, and a fault injection method was proposed based on the deviation between the analyzed output signals. Collaborative robot data collected in the actual fault state could be replaced with data collected in the proposed fault injection state. The comparison of the performance of the model trained with fault injection data and trained with actual fault data confirmed that there was almost no difference, with an average of 0.97 and 0.98 accuracy, thus verifying the effectiveness of the proposed fault injection method.