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Design and Construction of Detector Module for UFFO Burst Alert & Trigger Telescope
정애라,최지녕,최연주,정수민,김지은,김민빈,김석환,김예원,이직,임희진,민경욱,나고운,남지우,박일흥,Jung, Aera,Ahmad, Salleh,Barrillon, Pierre,Brandt, Soren,Budtz-Jorgensen, Carl,Castro-Tirado, Alberto J.,Chen, Pisin,Choi, Ji Nyeong,Choi, Yeon J 한국천문학회 2012 天文學會報 Vol.37 No.2
One of the key aspects of the upcoming Ultra-Fast Observatory (UFFO) Pathfinder for Gamma-Ray Bursts(GRBs) identification will be the UFFO Burst Alert & Trigger Telescope(UBAT), based on a novel space telescope technique. The UBAT consists of coded mask, hopper, and detector module(DM). The UBAT DM consists of YSO crystal arrays, multi-anode photo mulipliers, and readout electronics. We will present the design and construction of the UBAT DM, and the response of the UBAT DM to X-ray sources.
고속도로 영업소에서 하이패스에 의한 온실가스 저감효과 연구
정애라(Aera Jeong),정혁(Hyuk Jung),최승환(Seunghwan Choi),최동석(Dongseok Choi),김훈명(Hunmyoung Kim),박용성(Yongsung Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The Hi-pass, which is the representative of Green house gas reduction from the road, succeeded to reduce the serious CO₂ emission and fuel with vehicle increase for last years. The increase of user who experiences the convenient and fuel saving effect by Hi-pass occurred. This study was investigated CO₂ emission comparing on the Hi-pass and the normal roads. To measure CO₂ emission, 4 types of test vehicles which is compact, small, medium and large size were used. CO₂ emission was calculated by fuel consumption from test vehicles. The normal roads had 315,835 ton CO₂ emission. However, The Hi-pass roads had 293,057 ton. These test results show that Hi-pass has reduction effect of CO₂ emission of 22,778ton.
정사무엘(Samooel Jung),송현파(Hyun-Pa Song),이나영(Na Young Lee),장애라(Aera Jang),조철훈(Cheorun Jo) 한국식품영양과학회 2008 한국식품영양과학회지 Vol.37 No.6
Gallic acid와 linoleic acid의 합성물인 octadeca-9,12-dienyl-3,4,5-trihydroxybenzoate(GA-LA)의 화장품산업에서의 이용 가능성을 알아보기 위하여 유전독성학적 안전성을 확인하고 크림 베이스 유화물을 사용하여 전자공여능, FRAP 및 tyrosinase 활성 억제능력과 같은 GA-LA의 생리 기능성 실험을 실시하였다. 그 결과 유전독성학적 안전성이 확인되었고, 산화에 의한 피부의 노화를 억제하기 위한 항산화 능력과 미백과 관련된 tyrosinase 활성 억제 능력이 있음이 확인되었다. 따라서 GA-LA는 식품산업뿐만 아니라 화장품산업에서 유용한 기능성 물질로 쓰일 수 있을 것이라고 생각되어진다. The objective of this study was to investigate the genotoxicological safety and biological functions of octadeca-9,12-dienyl-3,4,5-trihydroxybenzoate (GA-LA) in cream-based emulsion for future application as a functional cosmetic material as well as food. GA-LA was synthesized chemically from gallic acid and linoleic acid. The Ames test showed that GA-LA did not have mutagenical toxicity. The control cream-based emulsion containing GA-LA was prepared by commercial method and tested for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity. Ferric reducing antioxidant power (FRAP) and inhibition effect against tyrosinase of the emulsions were tested for the evaluation of antioxidative and skin-whitening activities. The results showed that DPPH radical scavenging activity in the cream-based emulsion containing GA-LA was higher (52.65%) than that of the control (4.30%). The FRAP value of the sample was 12.85%, however, no activity was found in control. The inhibition effect of tyrosinase showed also a higher value (26.29%) when compared to the control. The results indicate that GA-LA, which showed superior antioxidative and skin-whitening activities in cream-based emulsion, is a useful functional material applicable in cosmetic products as well as food.
국내연료의 고유탄소함유량에 의한 CO₂배출계수 및 배출량 산정 연구
정애라(Aera Jeong),정혁(Hyuk Jung),신용일(Yongil Shin),박용성(Yongsung Park),강형규(Hyungkyu Kang) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Method of Tier2 is calculated by the CO₂ emission factor and calorific values for intrinsic carbon content of domestic fuel. However, until the present, we have been applying the CO₂ emission factor of IPCC(Intergovernmental Panel On Climate Change) guidelines and calorific values for intrinsic carbon content of domestic fuel to calculate CO₂ emission of Tier2 level. So we think that estimated CO₂ emission is not accurate. In this study, the CO₂ emission factor and calorific values of gasoline, diesel and LPG according to intrinsic carbon content of domestic fuel are developed and be calculated CO₂ emission to be accurate estimation of CO₂ emission. As a results, the CO₂ emission factors of gasoline, diesel and LPG are 72,221㎏/TJ, 73,187㎏/TJ, 66,053㎏/TJ in each. The CO₂ emissions of gasoline, diesel and LPG are also 22,546,595ton, 41,200,441ton, 13,581,060ton in each per year.
The Slewing Mirror Telescope of the Ultra Fast Flash Observatory Pathfinder
정수민,최지녕,정애라,김민빈,김석환,김예원,김지은,이직,임희진,나고운,남지우,박일흥,서정은,Jeong, Soomin,Choi, Ji Nyeong,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Kim, Jieun,Lee, Jik,Lim, Heuijin,Na, Go Woon,Nam, Jiwoo,Park, Il Hung 한국천문학회 2012 天文學會報 Vol.37 No.2
The Slewing Mirror Telescope (SMT) is a key telescope of Ultra-Fast Flash Observatory (UFFO) space project to explore the first sub-minute or sub-seconds early photons from the Gamma Ray Bursts (GRBs) afterglows. The first realization of UFFO is the 20kg UFFO-Pathfinder (UFFO-P) to be launched on board the Russian Lomonosov satellite in 2013 by the Soyuz-2 rocket. Once the UFFO Burst Alert & Trigger Telescope (UBAT) detects the GRBs, Slewing mirror (SM) will rotate to bring the GRB into the SMT's field of view instead of slewing the entire spacecraft. SMT can image the UV/Optical counterpart with about 4-arcsec accuracy. However it will provide a important understanding of the GRB mechanism by measuring the sub-minute optical photons from GRBs. SMT can respond to the trigger over $35^{\circ}{\times}35^{\circ}$ wide field of view within 1 sec by using Slewing Mirror Stage (SMS). SMT has 10-cm Ritchey-Chretien telescope and $256{\times}256$ pixilated Intensified Charge-Coupled Device (ICCD) on focal plane. In this paper, we discuss the overall design of UFFO-P SMT instrument and payloads development status.
최지녕,최연주,정수민,정애라,김민빈,김지은,김석환,김예원,이직,임희진,민경욱,나고운,남지우,박일흥,서정은,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Min Bin,Kim, Ji Eun,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, Kyung Wo 한국천문학회 2012 天文學會報 Vol.37 No.2
UFFO Burst Alert & Trigger telescope (UBAT) is one of major instruments of UFFO-Pathfinder. The UBAT aims at 10 arcmin resolution localization of Gamma Ray Bursts with X-ray coded mask technique. It has $400mm{\times}400mm$ coded mask aperture, hopper, shielding and detector module with effective area of $191cm^2$. The detector module consists of an assembly of 36 64-ch MAPMTs and $25mm{\times}25mm$ pixellated YSO crystal array, and associated analog and digital electronics of about 2500 channels. We performed a vibration test using a dummy MAPMT with the detector module structure to measure the indused stress applied onto the MAPMT. We designed a sub-structure on the detector module to avoid the resonance that would otherwise deforms the detector module structure. A finite element analysis confirms the reduction of the load acceleration down to 12g. The experimental results are to be reported. Consequently, it proves that the MAPMT arrays of the flight UBAT detector module structure would survive in the space launch environment.
약용식물 추출물 급여가 닭 다리육의 항산화 기능에 미치는 영향
조철훈(Cheorun Jo),장애라(Aera Jang),정사무엘(Samooel Jung),최준호(Jun-Ho Choe),김빛나(Binna Kim),이경행(Kyong Haeng Lee) 한국식품영양과학회 2009 한국식품영양과학회지 Vol.38 No.3
항균 및 항산화 활성을 갖는 약용식물 추출물을 육계에 급여하는 과정에서 약용식물이 갖는 항산화 활성이 계육에 전이될 수 있는가를 확인하기 위하여 다리육을 냉장 저장하면서 항산화 활성과 관능적 특성 변화를 조사하였다. 약용식물 추출물을 0.3%와 1%로 첨가한 사료를 급여시킨 육계의 다리육에서 수분, 조단백질, 조지방 및 조회분의 함량은 차이를 보이지 않았으나, 다리육의 총 페놀 함량을 측정한 결과 처리구가 대조구에 비해 유의적으로 높았으며, 0.3과 1.0% 처리구간 차이는 발견되지 않았다. 닭 다리육의 DPPH 라디칼 소거능은 0.3% 및 1.0% 약용식물 추출물 첨가군에서 대조군보다 약간 높은 라디칼 소거능을 보이는 것으로 나타났다. 또한 TBARS 값은 0.3% 및 1.0% 첨가군의 경우에는 대조군에 비하여 약간 높은 TBARS 값으로 시작하였으나 저장기간에 따른 변화를 보면 대조군에 비해서는 다소 낮은 TBARS 값을 유지하는 것으로 나타났다. 관능검사 결과를 보면 저장 7일 이후에 색, 맛, 냄새 그리고 종합적 기호도에서 약용식물 첨가군이 대조군에 비하여 다소 높은 관능점수를 얻어 계육의 저장 중 산화적 변질이 급여한 약용식물 추출물에 의해 감소되는 것을 확인할 수 있었다. This study was performed to investigate the effect of dietary medicinal herb extract mix (MHEM, mulberry leaf : Japanese honeysuckle : goldthread=48.5:48.5:3.0) on antioxidative activity of chicken thigh meat. The dietary treatments consisted of a corn-soybean meal basal diet (control), basal diet with 0.3% and 1% MHEM. At the end of the feeding trial, thigh meat samples were collected and stored in a refrigerator at 4oC to be analyzed on day 0, 3, 7 and 14. The MHEM did not affect proximate composition of the thigh meat. Total phenol contents of the thigh meats in treatment groups were higher than that of the control (p<0.05). 1,1-Diphenyl-2-picrylhydrazyl radical scavenging activity were higher in dietary treatment group. 2-Thiobarbituric acid reactive substances values of the treatment group were lower than that of control at day 7 and 14 and the added level also affected the inhibition of lipid oxidation of thigh meat. In sensory test, panelists preferred treatment group at day 7 and 14. Therefore, results indicate that dietary MHEM added to chicken may retard the oxidative deterioration of chicken thigh meat during cold storage.
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.
The Burst Alert and Trigger Telescope for the Ultra Fast Flash Observatory Pathfinder
나고운,최지녕,최연주,정수민,정애라,김지은,김민빈,김석환,김예원,이직,임희진,민경욱,박일흥,서정은,Na, Go Woon,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Ji Eun,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, 한국천문학회 2012 天文學會報 Vol.37 No.2
The Ultra Fast Flash Observatory (UFFO) pathfinder is a payload system on-board the Russian satellite Lomonosov, scheduled to be launched in 2013. The main purpose of the UFFO pathfinder is to observe the early photons from Gamma-Ray Bursts. It consists of two instruments. The first instrument is the UFFO Burst Alert X-ray Trigger telescope (UBAT) for the fast-trigger and detection of GRB location, and the second is the Slewing Mirror Telescope (SMT) for the observation of the UV/optical afterglow from the GRB located by the UBAT. It will provide the first-ever systematic study of UV/optical emission far earlier than 1 sec after trigger. We will present the design, fabrication and the preliminary performance of the UBAT.
유선아(Seona Yu),정애라(Aera Jeong),정혁(Hyuk Jung),이현우(Hyunwoo Lee),권해붕(Haebung Gwon),박용성(Yongsung Park) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Method of Tier2 is calculated by the CO₂ emission factor and property of domestic fuel. However, until the present, we have been applying the CO₂ emission factor of IPCC(Intergovernmental Panel On Climate Change) guidelines and calorific values for intrinsic carbon content of domestic fuel to calculate CO₂ emission of Tier2 level. So we think that estimated CO₂ emission is not accurate. In this study, the CO₂ emission factor and calorific values of gasoline, diesel and LPG according to property (density, calorific values, intrinsic carbon content) of domestic fuel is developed and be calculated CO₂ emission to be accurate estimation of CO₂ emission. As a results, the CO₂ emission factors of Gasoline, Diesel, LPG and CNG are 72,940kg/TJ, 73,170kg/TJ, 66,070kg/TJ, 55,380kg/TJ in each.