http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김상수(Sang-Soo Kim),백채훈(Chae-Hoon Paik),유상선(Sang-Sun Yoo),김도익(Do-Ik Kim),이건휘(Geon-Hui Lee) 한국차학회 1999 한국차학회지 Vol.5 No.1
These experiments were conducted to evaluate the acaricide susceptibility of the predatory mite, Amblyseius womersleyi Schicha, which is one of the the most effective agents for biological control of the tea red spider mite. Tetranychus kanzawai Kishida. Susceptibility levels of the Sungjun and Bosung populations to azocyclotin, fenpropathrin, pyridaben. fenpyroximate and tebufenpyrad were 1-2 times lower than the Youngam population. However, LC50 values of fenpyroximate and tebufenpyrad for the populations tested were almost similar to the proposed field rate of these acaricides in Korea. Therefore. the use of fenpyroximate and tebufenpyrad for the control of T. kanzawai could be satisfactory in maintaining the density of A. womersleyi in tea field.
김상수(Sang-Soo Kim),유상선(Sang-Sun Yoo),백채훈(Chae-Hoon Paik) 한국차학회 1999 한국차학회지 Vol.5 No.1
Effectiveness of several acaricides on tea red spider mite. Tetranychus kanzawai Kishida was evaluated in laboratory and field studies. In the laboratory study. ethoxazole (50. 100 ppm) was highly effective against egg and immature stages. but ineffective against adult females. Meantime, ethoxazole+fenpropathrin, chlorfenapyr+ flufenoxuron, milbemectin, acequinocyl, and bifenazate were highly effective against all stages of T. kanzawai. Diafenthiuron was highly effective against all stages tested with the exception of egg stage. In adult females treated with ethoxazole, we observed significant reduction in egg hatchability, but there was no obvious effect on number of eggs laid. In the tea field study, milbemectin and bifenazate were satisfactory control of mixed developmental stages, whereas, ethoxazole, ethoxazole+fenpropathrin, chlorfenapyr+flufenoxuron, acequinocyl, and diafenthiuron were also effective for the control of T. kanzawai.
저전압 MEMS 마이크론폰용 초저잡음 LDO 레귤레이터 설계
문종일(Jong-il Moon),남철(Chul Nam),유상선(Sang-sun Yoo) 한국정보통신학회 2021 한국정보통신학회 종합학술대회 논문집 Vol.25 No.2
전달받은 음성신호를 전기신호로 바꾸어주는 마이크로폰은 라디오, 스마트 기기, 차량 등의 다양한 산업 분야에 널리 사용되어왔다. 최근 스마트폰 기술의 발달과 무선이어폰의 소형화에 따라 초소형 고감도 마이크로폰에 대한 요구가 증가하고 있다. 차세대 초소형 마이크로폰 시스템의 후보로 MEMS 센서가 개발되고 있으며 이를 지원하는 ROIC 대한 개발 또한 활발하다. 마이크로폰 시스템은 주변의 잡음뿐만 아니라, 함께 사용되는 전자회로의 잡음에 대해서도 민감하므로, 낮은 노이즈를 갖는 전원을 공급할 수 있는 전원장치와 노이즈를 최소화할 수 있는 설계 방법들이 필요하다. 이에 본 논문은 MEMS 마이크로폰 센서 모듈에 사용 가능한 낮은 전원 노이즈를 갖는 LDO(low drop output) 레귤레이터 IC 구조를 제안한다. 제안한 회로는 2.0~3.6V를 공급받아 1.3V의 출력을 내보낼 수 있으며 라이트 로드에서 10㎃까지 드라이브할 수 있다. 제안하는 LDO는 1.2㎷/V의 line regulation, 0.63㎷/㎃의 load regulation 특성을 가지며 20㎐~20㎑까지 누적 적분 출력 잡음은 13㎶ 이하의 특성을 가진다. TSMC 180㎚ 공정으로 post layout simulation을 진행하였으며 설계한 칩의 면적은 325㎛ x 165㎛다. Microphones can convert received voice signals to electric signals. They have been widely used in various industries such as radios, smart devices and vehicles. Recently, the demands for small size and high sensitive microphones are increased according to the minimization of wireless earphone with the development of smart phone. A MEMS system is a good candidate for an ultra-small size microphone of a next generation and a read out IC for high sensitive MEMS sensor is researched from many industries and academies. Since the microphone system has a high sensitivity from environment noise and electric system noise, the system requires a low noise power supply and some low noise design techniques. In this paper, a low noise LDO is presented for small size MEMS microphone systems. The input supply voltage of the LDO is 1.5-3.6V, and the output voltage is 1.3V. Then, it can support to 5㎃ in the light load condition. The integrated output noise of proposed LDO form 20㎐ to 20㎑ is about 1.9V. These post layout simulation results are performed with TSMC 0.18㎛ CMOS technology and the size of layout is 325㎛ × 165㎛.