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산소 가감에 의한 스파크 점화기관의 성능 및 배출가스 특성에 관한 실험적 연구
홍순열(Soon-yul Hong),윤창식(Chang-sik Yoon),김두화(Doo-hwa Kim),조성제(Seong -je Cho),김치원(Chi-won Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
In this study, engine performance, combustion characteristics and exhaust emissions were tested and analyzed with changing the oxygen volumetric fraction. The conventional carbureted S. I. engine was modified and designed to the electronic controlled gasoline injection engine. Tested parameters were the oxygen volumetric fraction and engine speed. As the above experiment was performed, it was found that the combustion and power performance enhanced and exhaust emission reduced, like a predicted trend.<br/>
Diversity of Yeasts Associated with Panax ginseng
Hong, Soon-Gyu,Lee, Kang-Hyun,Kwak, Jang-Yul,Bae, Kyung-Sook The Microbiological Society of Korea 2006 The journal of microbiology Vol.44 No.6
Biodiversity of yeasts was investigated in the ginseng cultivation field. Among 34 isolates tested in this study, 26 isolates belonged to the hymenomycetous yeast group. These 26 strains were classified into 12 species including four new-species candidates that did not have clear affiliation to any established species. Seven isolates among the remaining strains were classified into three ascomycetous yeast species, and one isolate was identified as a urediniomycetous yeast species.
The Ground Checkout Test of OSMI on KOMPSAT-1
Sang Soon Yong,Hyung Sik Shim,Haeng Pal Heo,Young Min Cho,Kyoung Hwan Oh,Sun Hee Woo,Hong Yul Paik 大韓遠隔探査學會 1999 大韓遠隔探査學會誌 Vol.15 No.4
Ocean Scanning Multispectral Imager (OSMI) is a payload on the KOMPSAT satellite to perform global ocean color monitoring for the study of biological oceanography. The instrument images the ocean surface using a wisk-broom motion with a swath width of 800km and a ground sample distance (GSD) of <1km over the entire field of view (FOV). The instrument is designed to have an on-orbit operation duty cycle of 20% over the mission lifetime of 3 years with the functions of programmable gain/offset and on-board image data compression/storage. The instrument also performs sun and dark calibration for on-board instrument calibration. The OSMI instrument is a multi-spectral imager covering the spectral range from 400nm to 900nm using CCD Focal Plane Array (FPA). The ocean colors are monitored using 6 spectral channels that can be selected via ground commands. KOMPSAT satellite with OSMI was integrated and the satellite level environment tests including instrument aliveness/functional test, such as launch environment, on-orbit environment (Thermal/Vacuum) and EMI/EMC test were performed at KARI. Test results met the requirements and the OSMI data were collected and analyzed during each test phase. The instrument is launched on the KOMPSAT satellite on December 21,1999 and is scheduled to start collecting ocean color data in the early 2000 upon completion of on-orbit instrument checkout.
THE KOMPSAT-I PAYLOADS OVERVIEW
Park, Hong Yul,Choi, Gi Hyuk,Yoon, Hyeong Sik,Lee, Seunghoon,Woo, Sun Hee,Shim, Hyung Sik,Oh, Kyoung Hwan,Cho, Young Min,Yong, Sang Soon,Lee, Sang Gyu,Heo, Haeng Pal 대한원격탐사학회 1998 International Symposium on Remote Sensing Vol.14 No.1
Korea Aerospace Research Institute (KAKI) is developing a Korea Multi-Purpose Satellite I (KOMPSAT-1) which accommodates Electro-Optical Camera (EOC), Ocean Scanning Multi-spectral Imager (OSMI), and Space Physics Sensor (SPS). The satellite has the weight of about 500kg and will be operated on the 10:50 AM sun-synchronized orbit with the altitude of 685 km. The satellite will be launched in 1999 and its lifetime is expected to be over 3 years. The main mission of EOC is the cartography to provide the images from a remote earth view for the production of 1/25000-scale maps of KOREA. EOC collects 510 - 730 nm panchromatic imagery with the ground sample distance(GSD) of 6.6 m and the swath width of 17 km by push broom scanning. EOC also can scan ±45 degree across the ground track using body pointing method. The primary mission of OSMI is worldwide ocean color monitoring for the study of biological oceanography. It will generate 6 band ocean color images with 800 km swath width and 1km GSD by whiskbroom scanning. OSMI is designed to provide on-orbit spectral band selectability in the spectral range from 400 nm to 900 nm through ground command. This flexibility in band selection can be used for various applications and will provide research opportunities to support the next generation sensor design. SPS consists of High Energy Particle Detector (HEPD) and Ionosphere Measurement Sensor (IMS). HEPD has missions to characterize the low altitude high-energy particle environment and to study the effects of radiation environment on microelectronics. IMS measures densities and temperature of electrons in the ionosphere and monitors the ionospheric irregularities at the KOMPSAT orbit.
Test Result of Microgrid Management Function in KERI Pilot Plant
Jong-Yul Kim,Jin-Hong Jeon,Seul-Ki Kim,Soon-Man Kwon 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
As usual, the microgrid operates in gridconnect mode, but, when a fault occurs in the upstream grid, it should disconnect and shift into islanded operation mode. In grid-connect mode, the controlling power flow at PCC is necessary management function rather than the frequency and voltage. However, the controlling the frequency and voltage is asked in islanded mode. To achieve these management goals appropriately, the cooperative control strategy among microsources is needed. This supervisory control action is executed at MMS. In this paper, the management function of MMS is presented and evaluated by HILS test system and microgrid pilot plant. The proposed HILS test system was composed of the RTDS and a communication emulator. The RTDS performed real-time simulation of component models of the microgrid and the communication emulator simulated communication functions of components of the microgrid. The pilot plant consists of the PV, PV/Wind Hybrid system, BESS, diesel generators, and RLC loads. The test results show that the proper control strategy can ensure stability of microgrid in islanded mode and maintain the power flow of PCC at desired value successfully.