http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유도결합 플라즈마 조건에 따른 Nylon/spandex 혼방섬유의 표면손상 및 실리콘 오일 제거 영향
정탁,신중욱,지영연,김상식,Jeong, Tak,Sin, Jung-Uk,Ji, Young-Yeon,Kim, Sang-Sik 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.5
Plasma treatment has been increasingly used for surface cleaning and polymerization in many industries. In this study, inductively coupled plasma (ICP) treatment is used to remove organic residuals, mainly silicon oils from nylon66/spandex fabrics. The removed silicone oils from the fabrics are characterized using scanning electron microscopy. EDX and XPS are also used for determination of the change in elements on the fiber surface. It is shown that lower energy plasma treatment with longer plasma operating time Performs the best in removal of the silicon oils from the fabrics. On the contrary, increasing the energy input enhances the ion damage and yields high heat loads on the fiber surface. Meanwhile, ICP treatment for removing silicon oils is almost same as wet chemical cleaning method in terms of efficiency.
Diffusion 및 BLIP 모델 기반 이미지 데이터 증강 기법
정탁(Tak Jung),정희철(Heechul Jung) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
The importance of data in the field of deep learning is well recognized, particularly in the domain of image classification where a large amount of diverse data is crucial. However, gathering this data can be labor-intensive and costly. In this paper, we propose an algorithm that can augment images and use them for improving image classification performance of convolution neural networks. The proposed algorithm can contribute to solving the data shortage problem of deep learning by generating synthetic data originated from original image. Through empirical evaluations, we validate that our synthetic data not only supplements the original dataset but also enhances the models generalization capabilities. Through this paper, researchers in the field of Computer Vision are expected to develop models of better performance by acquiring image data in a more efficient way than conventional methodologies.
Via-hole 구조의 n-접합을 갖는 수직형 발광 다이오드 전극 설계에 관한 연구
박준범,박형조,정탁,강성주,하준석,임시종,Park, Jun-Beom,Park, Hyung-Jo,Jeong, Tak,Kang, Sung-Ju,Ha, Jun-Seok,Leem, See-Jong 한국마이크로전자및패키징학회 2015 마이크로전자 및 패키징학회지 Vol.22 No.4
Recently, light emitting diodes (LEDs) have been studied to improve their efficiencies for the uses in various fields. Particularly in the aspect of chip structure, via hole type vertical LED chip is developed for improvement of light output power, and heat dissipations. However, current vertical type LEDs have still drawback, which is current concentration around the n-contact holes. In this research, to solve this phenomenon, we introduced isolation layer under n-contact electrodes. With this sub-electrode, even though the active area was decreased by about 2.7% compared with conventional via-hole type vertical LED, we could decrease the forward voltage by 0.2 V and wall-plug efficiency was improved approximately 4.2%. This is owing to uniform current flow through the area of n-contact. 최근 Light Emitting Diode (LED)의 효율을 높이기 위한 연구가 활발히 진행 되고 있다. 특히 소자 측면에서는 수평형 LED, 수직형 LED, via-hole 구조의 수직형 LED 등의 다양한 구조가 제시되었다. 본 논문에서는 시뮬레이션을 통해 via-hole 구조의 수직형 LED의 새로운 전극 디자인을 제시하였다. 기존 Via-hole 구조의 수직형 LED의 n-contact hole 주변에 전류가 밀집되는 문제점을 해결하면서 유효 발광면적을 극대화 시켜 소자 전체에 균일한 전류를 주입할 수 있는 소자 디자인에 대해 평가하였다. 시뮬레이션 결과를 바탕으로 최적의 전극 디자인을 실제 디바이스로 제작하여 기존의 via-hole 구조의 수직형 LED와 비교 분석하였다. 최적화된 디자인이 적용된 via hole type 수직형 LED의 경우 기존 디자인에 비해 350 mA 주입시 약 0.2 V의 Forward Voltage 감소하였지만 광 출력은 비슷하여 최종적으로 4.2%의 WPE (Wall plug efficiency)가 향상됨을 보였다.