http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초정밀가공기를 이용한 Zerodur의 연삭 특성에 관한 연구
김주환,김건희,한정열,김석환,원종호 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
We explored a new rough grinding technique on optics materials such as Zerodur. The facility used is a NANOFORM-600 diamond turning machine with a custom grinding module and a range of diamond resin bond wheel. The grinding parameters such as workpiece rotation speed, depth of cut and feed rate were altered while grinding the workpiece surfaces of 20mm in diameter. Surface roughness is measured by Form Talysurf series2. Our target is to define grinding conditions producing the surface roughness better than 0.02μm Ra and the form accuracy of around 0.2μm PV.
Kim, Sug-Whan,Chun, Mun-Suk The Korean Astronomical Society 1984 Journal of The Korean Astronomical Society Vol.17 No.1
From the PDS scanning, isophote maps and surface luminosity distributions for the late type spiral galaxy NGC 6946 were obtained. Surface luminosity distribution showed that this galaxy can be classified as the Freeman's type II, and the deep spheroidal component was caused as a result of the ring structure in the central part of NGC 6946. Physical parameters-total magnitude ($M_T^B$), effective radius ($R_e^*$), central surface magnitude $U(0)_{CD}$, length scale (${\alpha}^{-1}$), disk-to-bulge ratio (D/B) and mass-to-luminosity ratio (M/L)-were also calculated, and the results show that NGC 6946 belongs to Sc I type galaxy according to the DDO classification, and is to be a fair sample of classification statge T=6.
The Electronics system of the Ultra Fast Flash Observatory Pathfinder
김지은,최지녕,최연주,정수민,정애라,김민빈,김석환,김예원,이직,임희진,민경욱,나고운,박일흥,서정은,Kim, Ji Eun,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, Kyung Wook,N 한국천문학회 2012 天文學會報 Vol.37 No.2
The Ultra Fast Flash Observatory (UFFO) pathfinder consists of the UFFO Burst Alert X-ray Trigger telescope (UBAT) and the Slewing Mirror Telescope (SMT). They are controlled by the UFFO Data Acquisition system (UDAQ). The UBAT triggers Gamma-Ray Bursts(GRBs) and sends the position information to the SMT. The SMT slews the motorized mirror rapidly to the GRB position to take the UV/Optical data within a second after trigger. The UDAQ controls each instrument, communicates with the satellite, collects the data from UBAT and SMT, and transfers them to the satellite. Each instrument uses its own field programmable gates arrays (FPGA) for low power consumption and fast processing, and all functions are implemented in FPGAs without using microprocessors. The entire electronics system of the UFFO pathfinder including architecture, control, and data flow will be presented.