http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ka대역 위성통신용 fly-away 터미널 안테나 & RF 시스템 설계
박병준,김춘원,윤원상,이성재,Park, Byungjun,Kim, Chunwon,Yoon, Wonsang,Lee, SeongJae 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.4
An Antenna & RF system for a fly-away satcom terminal application on ka-band is presented in this paper. The Fly-away satellite terminal can be moved and operated by two person and adapt automatic satellite tracking system in order to decrease the tracking time. Additionally, for low-power consumption, compact size and light-weight, a dual reflector antenna is constructed using dual-offset gregorian antenna structure. For minimize weight, the reflector of the antenna is made of Magnesium. For low-power consumption and light-weight, the pHEMT MMIC compound devices is utilized. The Electronic Band-Gap(EBG) Low-Pass Filter(LPF) is designed for harmonic rejection. In the receiving part, Low-Noise Block converter(LNB) structure is designed for compact and lightweight. In this paper, fly-away satcom terminal with low-power consumption, compact size and light-weight is described with antenna system and RF system performances. Through the experimentation, fly-away terminal's EIRP is more than 50dBW, G/T is more than $17dB/^{\circ}K$.
대규모 LPWA기반 네트워크에서 분산된 주차 공간 관리서비스의 설계 및 구현
박신열 ( Shinyeol Park ),정종필 ( Jongpil Jeong ),박동범 ( Dongbeom Park ),박병준 ( Byungjun Park ) 한국정보처리학회 2018 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.7 No.10
Due to the development of cities and the increase of vehicles, effective control of parking space management service in cities is needed. However, the existing parking lot management system does not provide limited or convenient service in terms of space and time. In this paper, we propose distributed parking space management service based on large scale LPWA (Low-Power Wide-Area). The parking sensor collects parking space information from the parking lot and is transmitted over a low-power wide network. All parking data is processed and analyzed in the IoT cloud. Through a parking space management service system in all cities, users are given the temporal convenience of determining the parking space and the area efficiency of the parking space.
비교란 Lysimeter를 활용한 논 토양에서의 살충제 Iprobenfos 용탈특성 구명
박병준 ( Byungjun Park ),임성진 ( Sungjin Lim ),오영탁 ( Youngtak Oh ),구명화 ( Myounghwa Ku ),주형곤 ( Hyeonggon Joo ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),문병철 ( Byeongch 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-
This study was conducted to investigate the leaching characteristics of fungicide iprobenfos in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.39, 1.34, and 1.37 Mg/m3, respectively. Iprobenfos was treated to each lysimeter at 14 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.9, 764.2, and 735.9 L, and pore volume numbers of supplied water for rice cultivation were 2.1, 1.6, and 1.3, respectively. Movement of iprobenfos in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Liquid chromatography (LC)-mass spectrometry (MS)-MS was used for iprobenfos analysis in water sample. Recovery and limit of quantitation (LOQ) of iprobenfos in water were 75.4-82.4% and 0.05 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume decreased with increasing clay content of paddy soil, and the volume of sandy loam, loam, and silty clay loam lysimeter were 1964.7, 1868.4, and 1265.6 L, respectively. Total leaching content of iprobenfos (treatment content 1,541 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0.2, 1.2, and 5.9 μg, respectively. Most of leached iprobenfos were detected at early stage of experiment in three lysimeters. Iprobenfos in soil horizon of sandy loam, loam, and silty clay loam paddy soil were detected at 46.6, 21.4 and 14.0 ng, respectively. These results showed that the movement of iprobenfos in sandy loam, loam, and silty clay loam paddy soil was very fast.
박병준(Byungjun Park),이태훈(Taehun Lee),김정석(Chungseok Kim),장경영(Kyung-Young Jhang) 한국비파괴검사학회 2011 한국비파괴검사학회지 Vol.31 No.1
닫힘균열과 같은 고체-고체의 접촉계면에서 접촉 음향 비선형성을 평가하기 위해 벌크 투과파를 이용하는 기존의 전통적인 음향 비선형 기술의 경우 현장 적용하는데 있어서 송수신 탐촉자를 장착하기 위해 구조물 내부로 접근하는 것은 접근한계성의 어려움이 있다. 본 연구에서, 고체-고체의 접촉계면에서 음향 비선형성을 측정하기 위해 새로운 반사기법을 제안하였고 이는 대상재료의 동일한 면에서 송신과 수신을 하여 현장 적용성에 매우 편리한 기법이다. 이를 위해, 접촉압력에 대한 멱함수 모델를 통한 선형 그리고 비선형 강성을 추정하고 이를 기반으로 계면에서 반사된 초음파의 비선형 파라미터를 이론적으로 계산하였다. A16061-T6 시편에 대한 접촉압력에 따른 접촉계면 실험 결과들은 이론적인 예측과 매우 잘 일치하였으며 따라서 본 연구에서 제안된 반사모드 기술의 유효성을 검증하였다. In the field application of the conventional acoustic nonlinear technique using through transmission of bulk waves to evaluate the contact acoustic nonlinearity(CAN) in solid-solid contact interfaces like as in the closed crack, it has difficulty to access inner position for attaching the pulsing or receiving transducer. In the present study, a new reflection technique has been suggested to measure the acoustic nonlinearity in solid-solid contact interfaces, which uses both of pulsing and receiving transducers on the same side of target and so that it will be very useful for the field application. For this, based on the linear and the nonlinear contact stiffness estimated by the power-model of the contacting pressure, the nonlinear parameter of the reflected ultrasonic wave at the interfaces has been theoretically calculated. Experimental results in contact interfaces of A16061-T6 alloy specimens with loading pressure showed good agreement with the theoretical predictions, which proves the validity of the suggested reflection mode technique.
비교란 Lysimeter를 활용한 논 토양에서의 제초제 Butachlor의 용탈특성
박정훤 ( Jeonghwon Park ),임성진 ( Sungjin Lim ),오영탁 ( Youngtak Oh ),주형곤 ( Hyeonggon Joo ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),박병준 ( Byungjun Park ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
This study was conducted to investigate the leaching characteristics of herbicide butachlor in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.38, 1.30, and 1.35 Mg/m3, respectively. Butachlor was treated to each lysimeter at 15 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.87, 764.15, and 735.85 L, and pore volume numbers of supplied water for rice cultivation were 0.98, 1.08, and 0.24, respectively. Movement of butachlor in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Gas chromatography (GC) was used for butachlor analysis in water sample. Recovery and limit of quantitation (LOQ) of butachlor in water were 88.1-104.6% and 3 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume of sandy loam, loam, and silty clay loam lysimeter were 705.9, 828.7, and 174.5 L, respectively. Total leaching content of butachlor (treatment content 770.57 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0.01, 0, and 0.07 mg, respectively. These results showed that the movement of butachlor in sandy loam, loam, and silty clay loam paddy soil was low.