• 천문학회보
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• 제36권1호
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• pp.62.2-62.2
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• 2011

It is well known that the cluster environment can change the atomic gas properties of galaxies through tidal interactions and/or by the hot cluster medium. Meanwhile, the molecular gas is expected to be less vulnerable to its surroundings due to its higher density, and no obvious influence of the environment on the molecular gas properties had been found among cluster spirals until recently. However, in a recent study by Fumagalli et al. (2009) of a sub-sample of Virgo spirals, it has been suggested that HI deficient galaxies can be also CO deficient. In order to further investigate if the HI deficiency indeed can result in the deficiency in molecular gas content, we compare the global CO and HI gas properties of Virgo spirals with those of galaxies in the Ursa Major cluster and the Pisces cluster, much lower density environments than Virgo. We discuss possible consequences of molecular gas deficiency in star formation activity of spiral galaxies in high density environment.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2007년도 춘계학술발표회 초록집
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• pp.73-73
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• 2007

Amorphous BON and Si-DLC thin films were synthesized by the RF plasma enhanced CVD method, and their oxidation behavior was studied up to $500^{\circ}C$ in air. The oxidation of both films was accompanied by evaporation of volatile species. The oxidation of BON film was preceded by nitrogen escape from the film, and oxygen penetration into the film. The oxidation of Si-DLC film was preceded by carbon escape probably as CO or $CO_2$from the film, and oxygen penetration into the film. The inwardly transported oxygen simply stayed in the oxidized BON and Si-DLC thin films.

• Journal of Microbiology and Biotechnology
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• 제6권5호
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• pp.309-314
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• 1996

Alcaligenes sp. SH-69 can synthesize poly(3-hydroxybutyrate-co-3-hydroxyvalerate) from a single carbon source such as glucose. To clone the phaC gene from Alcaligenes sp. SH-69, a polymerase chain reaction was performed using the oligomers synthesized based on the conserved regions of the phaC genes from other bacteria. A PCR product (550 bp) was partially sequenced and the deduced amino acid sequence was found to be homologous to that of the phaC gene from Alcaligenes eutrophus. Using the PCR fragment Southern blotting of Alcaligenes sp. SH-69 genomic DNA digested with several restriction enzymes was carried out. To prepare a partial genomic library, about 5-Kb genomic DNA fragments digested with EcoRI, which showed a positive signal in the Southern blotting, were eluted from an agarose gel, ligated with pUC19 cleaved with EcoRI, and transformed into Escherichia coli. The partial library was screened using the PCR fragment as a probe and a plasmid, named pPHA11, showing a strong hybridization signal was selected. Restriction mapping of the insert DNA in pPHA11 was performed. Cotransformation into E. coli of the plasmid pPHA11 and the plasmid pPHA21 which has phaA and phaB from A. eutrophus resulted in turbid E. coli colonies which are indicative of PHA accumulation. This result tells us that the Alcaligenes sp. SH-69 phaC gene in the pPHA11 is functionally active in E. coli and can synthesize PHA in the presence of the A. eutrophus phaA and phaB genes.

• 한국약용작물학회지
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• 제19권6호
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• pp.441-445
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• 2011

This research was conducted to investigate the influence of variouis organic substrates on growth and yield of organically grown ginseng seedlings in a shaded plastic house. In the investigation of optimal substrate, the eight substrate were formulated by adjusting blending rate of peatmoss, perlite, coir dust(coco peat), and vermiculite. Then, the changes in physico chemical properties of root substrates as well as their influences on the growth characteristics and yield were determined at six months after sowing. The elevation of the blending rate of peatmoss from 50% to 70% with decrease in the rate of inorganic component (mixture of perlite and vermiculite) from 50 to 30% resulted in the increase in container capacities and decrease in total porosities and air-filled capacities. The concentrations of $NH_4-N$, $P_2O_5$ and K increased as the incorporation rate of castor seed meal, phosphate ore, and langbenite, respectively, were elevated during the root medium formulations. The PPV-1 and PPV-4 substrates produced high stem length, stem diameter, shoot fresh weight, leaf area and root length among eight substrate. Root fresh weight was heaviest in PPV-4 compound nursery media. The results of this experiment will be utilized in the new substrate application for ginseng organic culture in shaded vinyl house.

• 지질공학
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• 제27권3호
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• pp.207-215
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• 2017

동래단층 북단부는 경상북도 경주시 동남쪽 약 15km 떨어진 외동읍 구어리 일대에서 울산단층과 교차하는 것으로 추정되고 있다. 이 지역에서 동래단층의 존재유무를 파악하고, 또한 동래단층대의 정확한 위치와 방향성을 확인하기 위하여 지표지질조사와 지구물리탐사(자력탐사, 전기비저항탐사, 주파수영역 전자탐사)를 수행하였다. 지질학적 자료와 지구물리탐사 자료를 종합적으로 해석하여 동래단층의 존재를 확인하였고, 동래단층의 주 연장방향이 N14E임을 확인하였다. 또한 주 방향성에 의하면 동래단층은 관거리 입실교 부근에서 울산단층과 교차하는 것으로 해석된다. 충적층에 의해 덮여 있어서 야외 지표지질연구로는 확인할 수 없었으나, 지구물리탐사에 의하면, 연구지역 내에서 단층파쇄대의 폭은 약 200 m 이상이며 그 폭은 연구지역의 북부보다 남부에서 더 넓은 것으로 해석된다.

• 농촌계획
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• 제28권1호
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• pp.57-69
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• 2022

Crop classification is very important for estimating crop yield and figuring out accurate cultivation area. The purpose of this study is to classify crops harvested in fall in Idam-ri, Goesan-gun, Chungcheongbuk-do by using unmanned aerial vehicle (UAV) images and support vector machine (SVM) model. The study proceeded in the order of image acquisition, variable extraction, model building, and evaluation. First, RGB and multispectral image were acquired on September 13, 2021. Independent variables which were applied to Farm-Map, consisted gray level co-occurrence matrix (GLCM)-based texture characteristics by using RGB images, and multispectral reflectance data. The crop classification model was built using texture characteristics and reflectance data, and finally, accuracy evaluation was performed using the error matrix. As a result of the study, the classification model consisted of four types to compare the classification accuracy according to the combination of independent variables. The result of four types of model analysis, recursive feature elimination (RFE) model showed the highest accuracy with an overall accuracy (OA) of 88.64%, Kappa coefficient of 0.84. UAV-based RGB and multispectral images effectively classified cabbage, rice and soybean when the SVM model was applied. The results of this study provided capacity usefully in classifying crops using single-period images. These technologies are expected to improve the accuracy and efficiency of crop cultivation area surveys by supplementing additional data learning, and to provide basic data for estimating crop yields.

• 한국제4기학회지
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• 제24권2호
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• pp.13-21
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• 2010

무안 피서리유적은 최근 서남해안 일대에서 확인되고 있는 구석기시대 유적들에 대한 의미 있는 자료들을 제공하고 있다. 무안 피서리유적에 대한 층위 및 지질학적 분석결과는 토양쐐기의 특성이 토양의 굳기나 토양내부의 성분 함량 및 고지표면의 기복에 따라 차이가 있을 수 있다는 것을 지시해주고 있다. 피서리유적에서 중기 구석기 늦은 단계 또는 후기 구석기 이른 단계의 석기들이 함께 출토되었는데 이는 이들 석기가 산출되는 문화층이 최대 빙하 발달시기 이후에 형성되었다는 것을 고려해 볼 때 활발한 침식과 재퇴적에 의해 여러 시기의 유물이 함께 재퇴적된 결과일 가능성을 지시해 주고 있다. 이번 연구를 통해 구석기 유물의 분포와 토양쐐기와 같은 토양층의 특성은 고지표면의 기복 및 기후환경과 같은 자연환경적 조건에 의해 영향 받을 수 있다는 것을 고찰하였다.

• 한국식품과학회지
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• 제32권5호
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• pp.997-1001
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• 2000

Gas chromatography를 이용한 profiling과 신속한 동정을 허브류에 존재하는 유기산의 분석에 적용하여 보았다. 흡착제로 Chromosorb P와 용출 용매로 diethyl ether를 사용하는 고체상 추출법을 이용하여 허브추출물로부터 유기산을 분리한 후, tert-butyldimethylsilyl 유도체로 만들어 극성이 다른 DB-5와 DB-17 컬럼으로 동시분석하였다. 두 컬럼에서 분리된 유기산 피크들을 dual capillary column system의 retention index(RI) library 탐색과 RI specta 비교로 신속하고 정확하게 동정할 수 있었으며 이들을 GC-MS로 확인하였다. 허브추출물들의 유기산 분석 결과 fatty acid, dioic acid, hydroxy acid, aromatic acid등 24가지의 유기산이 동정되었고 각 허브의 종류에 따라 특징적인 유기산 GC-profile을 나타내었다. 각 허브추출물의 GC profile의 유기산 조성만을 단순화시킨 RI spectra로 표현한 결과, 각 허브의 유기산 패턴의 분별이 매우 용이하였다.

• 헤리티지:역사와 과학
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• 제33권
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• pp.36-67
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• 2000

Square-shaped moated burial precincts(方形周溝墓) can be classified into type I that has bridges only at the comers, type II that has bridges at the comers and sides, type III that has bridges only at the sides, type IV that is surrounded by the moat without bridges, type V that has its sides less than those of type I ~ V by 1 or 2, and type VI that has the round-shaped ground. But the time differences among the types are not known yet. For the burial appliances of square-shaped moated burial precincts, there are stone coffins, pit burials and jar burials. The major burial appliances situated in the mound are stone coffins and pit burials, and jar burials are subsidiary appliances that were buried at the shoulder part of the mound or at precincts. According to the case of Gwanchang-ri KM423, grave mounds, which arc closely related with the burial appliances, were built by heaping up the earth in and around the precinct as low as only enough to protect the burial appliances. Considering the relics unearthed in the burial compartment of KM437, the time when square-shaped moated burial precincts were formed is estimated to be the age when Songguk-ri type earthenware and clay stripes earthenware co-existed. It was the early Iron Age when ironware began to sp read in this country. Emerging first in that age, square-shaped moated burial precincts were presumably formed until around the end of BC or the beginning of AD, when KM404 and KM423, which were unearthed with plain earthenware, grey earthenware and ironware, were formed. When analyzing the form of small-sized graveyards in precincts, the unearthed relics and the locations, the people who formed square-shaped moated burial precincts were considered as those who had a culture comprising clay stripes earthenware, which appears newly in the Songguk-ri type earthenware of native, and ironware, and a settled agricultural society based on paddy fields and labor forces of family units.

• 한국수산과학회지
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• 제56권3호
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• pp.275-283
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• 2023

This study optimized the vegetable rice porridge preparation process with Israeli carp Cyprinus carpio (VRP-IC). The optimum heating period for Israeli carp paste (IC-P) in a retort was 120 min as per yield results. Response surface methodology was performed with IC-P/[rice (glutinous rice: non-glutinous rice=6:4) (Rice, RI)+vegetable (carrot: zucchini=1:1) (vegetable, VE)] (X₁) and RI/VE (X₂) as independent variables; viscosity (Y₁), hardness (Y₂), amino nitrogen (Y₃), and overall sensory acceptance (Y₄) as dependent variables. Optimum rates of IC-P, RI, and VE were 47.37%, 24.49%, and 28.15%, respectively; predicted multiple response optimum values for the dependent variables were 20,150 mPa·s, 2,002.9 N/m2, 193.1 mg/100 g, and a 6.4 score for Y₁, Y₂, Y₃, and Y₄, respectively. Under optimum conditions, experimental values for Y₁, Y₂, Y₃, and Y₄ were 20,359.8±191.9 mPa·s, 2,015.0±9.6 N/m2, 188.1±4.9 mg/100 g, and a 6.5±0.2 score, respectively, which were not significantly different from the predicted values (P < 0.05). Results of F0 value, viscosity, hardness, volatile odor intensity, and browning suggested that the optimum sterilization period was 25 min. VRP-IC prepared under the optimum conditions was superior to commercial vegetable rice porridges in sensory evaluations.