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總括生産計劃에서 適定 퍼지수 比較法의 選擇에 관한 硏究
李相玩,朴永和,南賢祐,尹延根 동아대학교 공과대학 부설 한국자원개발연구소 1992 硏究報告 Vol.16 No.1
When using any of the aggregate production planning techniques mentioned in previous studies, it is generally assumed that the inputs of information are deterministic and easy to generate. However, the problem is more complex if the criteria and informations are expressed imprecisions. Therefore, it requires suitable method to deal with imprecisions. For select proper comparison method of fuzzy numbers in aggregate production planning with imprecise informations or criteria, this study use Dubois & Prade fuzzy number comparison method and Li-Lee fuzzy number comparison method among comparison methods fuzzy numbers. And then, proper method between two methods is selected. Also it is presented illustration.
Mg(OH)₂를 이용한 습식탈황에서 폐슬러리 처리특성연구
김근범,이은덕,박영성,임봉수 大田大學校 環境問題硏究所 1998 환경문제연구소 논문집 Vol.3 No.-
Properties analyses and treatment characteristics of waste slurry discharged in the wetted flue gas desulfurization process using Mg(OH)₂as a absorbent were investigated. Aeration and coagulation test were carried out to evaluate variation of some factors such as COD, SS, T-N, etc. related to waste slurry treatment. The hydraulic retention time(HRT) and coagulant dosage rate were applied as operating variables in experiment. As experimental results, the reduction effects of COD, SS in aeration test were distinct, due to oxidation of SO₃ and floc, formation of suspended solids. It was also found that the reduction efficiencies of SS and T-P in coagulation test are higher than 90%.
Geun-hee Choi,Yeong Byeon,Hyoung Yool Lee,Kyoungwhan Back 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Caffeic acid O-methyltransferase (COMT) methylates N-acetylserotonin into melatonin; that is, it has N-acetylserotonin O-methyltransferase (ASMT) activity. The ASMT activity of COMT was first detected in Arabidopsis thaliana COMT (AtCOMT). To confirm the ASMT activity of COMT in other plant species, we evaluated the ASMT activity of a COMT from rice (Oryza sativa) (OsCOMT). Purified recombinant OsCOMT protein from Escherichia coli was used to validate the high ASMT activity of OsCOMT, similar to that of AtCOMT. The Km and Vmax values for the ASMT activity of OsCOMT were 243 μm and 2,400 pmol/min/mg protein, which were similar to those of AtCOMT. Similar to AtCOMT, OsCOMT was localized in the cytoplasm. In vitro ASMT activity was significantly inhibited by either caffeic acid or quercetin in a dose-dependent manner. Analogously, in vivo production of melatonin was significantly inhibited by quercetin in 4-week-old detached rice leaves, suggestive of a positive role of COMT in melatonin biosynthesis in plants.
Development of Self-Questionnaire for Internal Dose Assessment by Food Ingestion
Lee JiEun,Kim Hyo Jin,Kye Yong-Uk,Lee Dong-Yeon,Jo Wol Soon,Lee Chang-Geun,Kim Jung-Ki,Kang Yeong-Rok 대한방사선방어학회 2022 방사선방어학회지 Vol.47 No.4
Background : The accident at the Fukushima Daiichi nuclear power plant increased the level of anxiety related to the radioactive contamination of various foods sourced in Japan . Particularly, after the accident , the detection of artificial radionuclides in locally produced foods raised food safety concerns . In this study, the radioactivity concentrations and annual ingestions of 40K and 137 Cs in food products commonly and frequently consumed by the general public were investi- gated , and the annual effective dose of each was evaluated . Materials and Methods : The 2016–2018 data from the Radiation Safety Management Report released by the Korea Nuclear Safety Technology Center was referenced for the evaluation of the amounts of 40K and 137Cs contained in food . Using the food-ingestion survey mentioned above as a reference , we selected 62 foods to include in our radioactivity concentration and dose as- sessment . We also developed a questionnaire and evaluated the responses from the subjects who answered the questionnaire . Results and Discussion : The radioactivity concentration of 137Cs was found to be close to or below the level of minimum detectable activity. Additionally, the annual ingestion of 62 foods was 294 . 77 kg/yr, the effective doses from 40K and 137Cs were 136 . 4 and 0 . 163 μSv/yr, respec- tively. Conclusion : Thus , the findings confirmed that the effective dose from 40K and 137Cs in food tends to be lower than the effective dose limit of 1 mSv/yr suggested by the International Com- mission on Radiological Protection (ICRP) Publication 60 . The questionnaire developed in this study is expected to be useful for estimating the annual effective dose status of Korean adults who consume foods containing 40K and 137Cs .
Lee, Su-Hwan,Bae, Hui-Su,Oh, Yang-Yeol,Lee, Sang-Hun,Kim, Yeong-Joo,Kim, Sun,Ryu, Jin-Hee,Jung, Kang-Ho,Lee, Choong-Geun,Kim, Jae-Hyeon,Kim, Yeong-Doo,Choi, Weon-Young,Cho, Jae-Yeong,Lee, Kyoung-Bo,Le 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.6
It is known that the poor soil fertility of newly reclaimed saline soils is due to the lack of organic matter and available mineral nutrients for crop production. The effect of green manuring with Sesbania aculeata in combination with five rates of urea-N treatments (N0. N25, N50, N75, N100) on the productivity of a subsequent whole-crop barley and the fertility of the reclaimed saline soil in Saemangeum was evaluated in the field during 2013-2014 growing season. Sesbania was grown during summer season (June to October). The amount of Sesbania incorporated was $16.2Mg\;ha^{-1}$. Sesbania contributed to $393kg\;N\;ha^{-1}$ to the soils when ploughed down and incorporated before whole-crop barley cultivated. The performances of whole-crop barley following sesbania incorporation were significantly affected by a combination of Sesbania manuring and different N rates. The N fertilizer equivalence without N fertilizer following Sesbania was 42.6% ($63.9kg\;N\;ha^{-1}$), compared with N100 ($150kg\;N\;ha^{-1}$) in fallow soils. The whole-crop barley yield responded to N fertilizer rates in both sesbania-amended and fallow soil. The yield response to nitrogen rates in fallow soil was linear (Y=0.0586X+3.3011, $R^2=0.9534$), whereas that in sesbania-amended soils was quadratic (Y= -0.001X2+0.1322X+5.7143, $R^2=0.9576$). The yield of whole-crop barley in sesbania-amended with increasing N rates was increased up to SN75 (115 kgN) $10.3Mg\;ha^{-1}$. Apparent N recovery (ANR) of whole-crop barely showed decreased with sesbania plus increasing rates of N fertilizer. Despite higher yield with sesbania manuring plus increasing N rates, the contributions of N from Sesbania with increasing N rates to whole-crop barley were decreased, whereas those from fertilizer increment due to excessively mineralized Nitrogen. Considering yield, ANR, N contribution from Sesbania and nitrogen fertilizer, the optimum N rate was N50 rate following sesbania incorporation.
청소년-부모 진로 일치와 진로결정: 성취를 통한 가족 인정 지향성에 의한 접근목표지향성의 조절된 매개효과
이근영(Geun Yeong Lee),연규진(Kyu Jin Yon) 한국진로교육학회 2019 진로교육연구 Vol.32 No.2
본 연구에서는 청소년-부모 진로 일치와 진로결정의 관계에서 접근목표지향성이 성취를 통한 가족 인정 지향성에 의해 조절된 매개효과를 가지는지 확인하고자 서울 지역에 소재하는 3개 일반계 고등학교 1, 2, 3학년 남녀학생 390명을 대상으로 자기보고식 설문 자료를 수집하였다. 분석 결과를 살펴보면 첫째, 청소년-부모 진로 일치가 높을수록 접근목표지향성이 증가함으로써 진로결정을 높이는 매개효과가 나타났다. 둘째, 성취를 통한 가족 인정 지향성 수준이 높을수록 접근목표지향성이 청소년-부모 진로 일치와 진로결정의 관계를 매개하는 영향이 강화되었다. 한편 청소년-부모 진로 일치를 통제하였을 때, 성취를 통한 가족 인정 지향성의 조건부효과에 의해 성취를 통한 가족 인정 지향성이 진로결정 수준을 낮추는 것으로 나타났다. 종합하면 한국의 고등학생들은 부모와 진로에 대해 합의하고 상호 간 노력에 만족할수록 더 배우고자하며 유능감을 증진하고자 하는 접근목표를 지향하게 되며, 결과적으로 진로에 대한 결정을 내리고 그에 대한 편안함을 느끼는 것으로 나타났다. The purpose of this study is to examine a moderated mediation effect of approach goal orientation by family recognition through achievement on the relationship between adolescent-parent career congruence and career decision. A self-reported survey was administered to 390 male and female students from 3 academic high schools in Seoul. A moderated mediation analysis was conducted using the SPSS Statistics 20.0 program and PROCESS Macro. The results of the study are summarized as follows. Approach goal orientation mediated the relationship between adolescent-parent career congruence and career decision. Family recognition through achievement moderated the relationship between approach goal orientation and career decision. In other words, the higher the score on family recognition through achievement, the more likely it is that approach goal orientation had a positive effect on career decision. When adolescent-parent career congruence was controlled, a conditional effect of family recognition through achievement indicated that it lowered the level of career decision. In conclusion, approach goal orientation had a moderated mediation effect by family recognition through achievement on the relationship between adolescent-parent career congruence and career decision. Further implications of the present study were discussed with suggestions of future study.
이근영 ( Lee Geun Yeong ) 한말연구학회 2003 한말연구 Vol.- No.13
N/A The purpose of this study are as follows; (ⅰ) Discribe the phonological system in <Cheophaemongeo> (ⅱ) Discribe the morphophonological rules in <Cheophaemongeo> The result of this study are as follows; (ⅰ) The phonologicall system same 18th Korean (ⅱ) The morphophonological rules almost same 18th Korean..
드론 원격정보를 활용한 실제증발산량의 산정: 가뭄지수를 위한 사전테스트
이근상 ( Geun-sang Lee ),김성욱 ( Sung-wook Kim ),함세영 ( Se-yeong Hamm ),이길하 ( Khil-ha Lee ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.12
Drought is a reoccurring worldwide natural hazard that affects not only food production but also economics, health, and infrastructure. Drought monitoring is usually performed with precipitation-based indices without consideration of the actual state and amount of the land surface properties. A drought index based on the actual evapotranspiration can overcome these shortcomings. The severity of a drought can be quantified by making a spatial map. The procedure for estimating actual evapotranspiration is costly and complicated, and requires land surface information. The possibility of utilizing drone-driven remotely sensed data for actual evapotranspiration estimation was analyzed in this study. A drone collected data was used to calculate the normalized difference vegetation index (NDVI) and soil-adjusted vegetation index (SAVI). The spatial resolution was 10 m with a grid of 404 x 395. The collected data were applied and parameterized to an actual evapotranspiration estimation. The result shows that drone-based data is useful for estimating actual evapotranspiration and the corresponding drought indices.
Deuk-Yeong Lee,Geun-Hyoung Choi,Jin-Ho Rho,Hyo-Sup Lee,Sang-Won Park,Kyeong-Yeol Oh,김진효 한국응용생명화학회 2020 Journal of Applied Biological Chemistry (J. Appl. Vol.63 No.3
The long-chained perfluoroalkyl acids (PFAAs), perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), are a potential exposure risk in the environment, specifically for humans due to high levels of bioaccumulation, persistence, and toxicity. In the current study, the plant uptake factors (PUFs) of spinach and Welsh onion were investigated on the three different concentration levels of PFOA and PFOS in soil. Spinach and Welsh onion were divided into three residue groups, a control group and two levels of PFOA and PFOS. The PFAAs spiked soils were aged for six months and the extractable residue of PFOS in the aged soil was reduced to 30-59% of the initial spiked concentrations for PFOS, while PFOA showed almost the same initial spiked concentrations. The PUFs for PFOA and PFOS were 0.111-2.821 and 0.047-3.175 for spinach, and 0.203-0.738 and 0.035-0.181 for Welsh onion, respectively. The highest PUF values in both vegetable were displayed when the residual concentration of PFAAs were part-per-billion (ppb) or sub-ppb in soil.