• 한국작물학회:학술대회논문집
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• 한국작물학회 2023년도 춘계학술대회
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• pp.23-23
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• 2023

• 자원환경지질
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• 제46권5호
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• pp.455-468
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• 2013

몽골 중부 항가이 남서부 지역의 다신칠렌 Nb-Ta 및 산트 동 산출지에 대한 예비조사를 수행하였다. 조사 결과 다신칠렌 지역의 Nb-Ta은 조사 지역에 넓게 분포하는 거정질 화강암과 주로 사암으로 구성된 고생대 퇴적층을 관입하는 페그마타이트 내 백운모에서 산출되는 것으로 확인되었다. Nb, Ta의 품위는 높지 않으나 거정질 화강암 지대에서 Th 542 ppm, U 56.9 ppm으로 비교적 높은 값을 갖는 노두를 발견하였다. REE의 함량은 조사 지역의 평균 함량과 최대 함량이 각각 지각의 평균 함량의 약 세 배와 일곱 배로 분석되었다. 산트 지역의 동은 고생대 퇴적층 내 규암에서 말라카이트와 같은 동 산화물로 관찰되었다. 조사지역에서 약 200 km 떨어진 우기누르 철-망간 광화대와 같은 층에서 Mn의 값이 12.4에서 34.6 %로 품위가 비교적 좋게 나타나는 것으로 확인되었다. 또한 REE의 함량은 조사지역의 평균 함량과 최대 함량이 각각 지각의 평균 함량의 약 2.5 배와 일곱 배로 분석되었다. 조사 지역의 화학 분석 결과에 대해 다변량 통계분석(요인분석)을 수행한 결과 다신칠렌 지역의 Nb-Ta은 백운모와 높은 상관관계를 갖는 것으로 나타났고, 산트 지역의 동은 Mo, Sn, Bi와 높은 상관관계를 갖는 것으로 나타났다. 또한 요인분석 결과는 산트 지역의 철이 희토류 원소들과 함께 퇴적되었음을 지시한다.

• 무역상무연구
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• 제78권
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• pp.119-143
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• 2018

This research aims to review every important academic research on risk management in FTA and to suggest a future area for further research. This research area seems to focus on conceptual study or fact finding rather than on theory development or empirical research on causal relationship or theory testing. The National Assembly Digital Library analyzed the results of 3,576 researches on thesis and journals fromthe results of the FTA. Research on FTA is analyzed in four major themes. First, there have been previous studies on business performance such as FTA export performance and economic effect. Second, analyzed the effects of FTA in product and service. The products are classified into agricultural, marine products, manufacturing, textiles and clothing, medicinal pharmaceuticals, cosmetics, and others. Services are classified into educational and cultural contents, service industry and financial industry. Third, research on the risk management of FTA Origin is broadly classified into the use of country of origin and the verification of origin, and the use of origin includes the study of rules of origin and systems of origin and management. Origin verification was divided into origin verification and origin risk management. Fourth, study on the conclusion area of the FTA, studies were conducted on areas such as Korea-US FTA, Korea-China FTA, Korea-EU FTA, Korea-Japan FTA, Korea-Chile FTA, and Korea-ASEAN FTA. Search results through the FTA, focused on analyzing the FTA area and concept research by research purpose. In addition, research methods are mainly focused on documentary survey, and research areas are concentrated on specific countries such as China and USA. This implies a necessity for a future development in that research area. Other areas for future research may include case research on actual failures in FTA, proactive risk management strategy, and integrated risk management for export companies. Risk management in FTA may help investment expansion, and that is why research on the issue matters.

• Ocean and Polar Research
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• 제30권4호
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• pp.509-518
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• 2008

Distribution of bacterial abundance and production was investigated in seawater around Saemangeum dike 7 times during March, $2007{\sim}July$, 2008. In the inner area of the dike, salinity variation was great due to river runoff from Mangyung and Dongjin Rivers and high chlorophyll a (chl a) concentrations up to $124.3{\mu}g\;l^{-1}$ was found. In the outer area of the dike, salinity was higher than in the inner area of the dike, and chl a was lower up to 10 times than in the inner area of the dike. Thus, the area of Saemangeum showed meso- to hypereutrophic conditions. Bacterial abundance and production ranged from 0.3 to $4.3{\times}10^9\;cells\;l^{-1}$ and from 5.2 to $570 pmol\;l^{-1}h^{-1}$ in outer area of the dike, respectively, while in the inner area of the dike bacterial abundance and production was 3 to 4 times higher ($0.4{\sim}12.7{\times}10^9\;cells\;l^{-1}$ and $12.3{\sim}1309\;pmol\;l^{-1}h^{-1}$, respectively) than those in the outer area. In both areas, bacterial abudance and production was highest in summer and lowest in winter. However, the variations of bacterial parameters was very large in each season. These large variations seemed to be related with the supply of organic matter. Bacterial abundance and production showed significant negative correlations with salinity in the inner area, suggesting that allochthonous organic matter input by river runoff could be an important factor in regulating the distribution of bacterial abundance and production. In addition, bacterial production also correlated positively with chl a in the inner area, suggesting that autochthonous substrate might be another regulating factor of bacterial growth in the area. These results suggest that the supply of both allochthonous organic substrates introduced by river runoff and autochthonous substrates produced by phytoplankon could be important in regulating bacterial growth and utilization of organic matter in the area. Thus, to manage water quality in the inner area of dike, it seems to be important to lower the load of both organic and inorganic nutrients from adjacent rivers.

• 한국대기환경학회지
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• 제21권5호
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• pp.495-505
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• 2005

This study is to estimate source contribution by air pollutantion types (point, area, line) over Seoul metropolitan area. The Air Pollution Model (TAPM) and the highly resolved anthropogenic and biogenic gridded emissions ($1km{\times}1km$) were applied to simulate $SO_2,\;NO_2,\;O_3\;and\;PM_{10}$ concentrations by seasons and contribution was estimated by their source types (point, area, line). The results showed that the simulated concentrations of secondary pollutant agreed well with observed values with an index of agreement (IOA) over 0.4, whereas IOAs over 0.3 were observed for most primary pollutants. The contributions of each source types by seasons were similar. The point source contribution was the highest for $SO_2$ at medium level ranged from $55.1\%\;to\;61.5\%$. But the contribution from area source during for the spring and summer increased as the concentration level increased. The line source contribution was the highest for $NO_2$ at all levels ranged from $68.3\%\;to\;93.1\%$. The results indicate that $SO_2$ emissions should be mainly controlled from point source, as well as area source at higher level concentration. Also, $NO_2\;and\;PM_{10}$ to from line source should be controlled.

• 한국제4기학회지
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• 제19권2호
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• pp.38-39
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• 2005

• Ocean and Polar Research
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• 제31권4호
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• pp.327-338
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• 2009

Zooplankton community structure was investigated in the Saemangeum region in March, May, July and October of 2007 and 2008 in order to understand the potential effect of post construction of Saemangeum dyke on their temporal and spatial distribution. Mean abundance of zooplankton in the inner and outer area of the dyke, except for dinoflagellate Noctiluca scintillans, ranged from 173 to 15,830 ind.m$^{-3}$, showing higher variability in the inner area compared to the outer area. Zooplankton abundance was higher in the outer area than the inner area in 2007, and vice versa in 2008. In the inner area of the dyke, zooplankton abundance was the highest in May 2007 and March 2008. In the outer area of the dyke, abundance was the highest in October 2007 and July 2008. Brackish species such as Tortanus derjugini and Pseudodiaptomus inopinus were dominant prior to construction of the dyke, and appeared less frequently in the inner area. Marine zooplankton taxa such as juvenile hydromedusa, and calanoid copepods Acartiahongi and Paracalanus parvus s.l. dominated both areas of the dyke. In CCA analysis, zooplankton community structure in the inner and outer area was similar in March and May, but different in July and October. Temperature, salinity and COD were important environmental factors affecting zooplankton community structure. These results suggest that zooplankton community structure in the inner and outer area of Saemangeum dyke are significantly affected by whether the sluice gates are closed or open.

• 한국의류학회지
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• 제15권1호
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• pp.28-37
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• 1991

Clothing and Textiles was introduced in the 1950s to Korea and has been developed. At this moment, it seems to be valuable to identify state of art of researches in clothing and textiles field. The purpose of the study was to investigate trends of subject-matter emphasis in clothing and textiles. The data were included clothing and textiles related research articles published in three professional journals from 1959 through 1990 and condensed at 5 year intervals. The identified 620 articles with clothing and textiles subject-matter emphasis were categorized in six areas: clothing construction, textiles, history of costume, design and aesthetics, socio-psychological aspect of clothing, and fashion merchandising. The results were as follows: 1. Since 1959, there has been a significant growth in terms of the number of research as well as in quality of research particulary considering the short history of the field. 2. The number of each area research was ranked as follows: 1) textiles (217) 2) history of costume (173) 3) socio-psychological aspect of clothing (88) 4) clothing construction (79) 5) fashion merchandising (34) 6) design and aesthetics (22) and others (7) 3. In the area of textiles, the most dominant area was clothing management (102 out of 217) and clothing hygenics research was getting increased from the late of 1980 through Journal of the Korean Society of Clothing and Textiles. 4. In the area of history of costume, most of the research have been published through Journal of Korean Costume Society. History of korean costume was the most dominant area (120 out of 173) and history of eastern costume area was getting increased from the late of 1980s. 5. In the area of socio-psychological clothing, the research was accelated in the beginning of 1980s through Journal of the Korean Society of Clothing and Textiles, while the research was decreased a· little in the late of 1980s. 6. In the area of clothing construction, it was revealed its decrease the percentage of total number of research and most of them were published through Journal of Korean Home Economics. 7. In the area of fashion merchandising, there has been continuous increase in the number of research from the late of 1970s to 1990, present. For the future direction, implications for interdisciplinary and ecological approach were suggested.

• 한국환경과학회지
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• 제20권10호
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• pp.1285-1295
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• 2011

In this study, occurrence status of nonpoint pollutants and characteristics of discharge by each nonpoint pollutants were examined through monitoring on nonpoint pollutants caused when raining in vineyard belonging to the agricultural area of various land use patterns. Also, the first flush analysis limited to studies on the existing non-percolation area was applied to percolation area to ascertain availability and criteria of study. Various water quality and sluice of nonpoint pollutants were analyzed, based on which discharge of nonpoint pollutants in agricultural area was ascertained to be influenced greatly by artificial factors such as period, cultivation, management, etc. Meanwhile, the first flush phenomenon at agricultural area was ascertained to occur, and the first flush was quantified through calculation of the first flush ratio. If MFF30 is based, discharge load by each nonpoint pollutants caused when raining was investigated to include 40.8% on the basis of total discharge. In case of SS in pollutants showed the highest first flush phenomenon of 64.8%. Through such a result, calculation possibility of the initial rain criteria was ascertained, and it was determined that reliability-assured criteria were calculated through further monitoring.

• 항공우주시스템공학회지
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• 제9권2호
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• pp.25-33
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• 2015

Global market of unmanned aircraft(UA) is rapidly expending based on the versatile and efficient utility of the UA. Domestically many industries, universities and research institutes are trying to do research and development of the UA in various angle of aspect. In spite of these effort, all the participants of research and development of the UA has been suffering the difficulty of acquiring the airspace around vicinity of Goheung airfield for the flight test of UA. Although the current procedure of execution of the flight test of UA is set after acquiring the airspace by applying the NOTAM(Notice To Air Man) to the Ministry of Land, Infrastructure and Transport(MLIT) at least 7 days before the flight test and commencing with the publication of the NOTAM by MLIT, if the flight test is carried out as planned, changing or reapplying the NOTAM expends mort time and makes difficulty often. Therefore it is needed that a restricted airspace for the flight test of UA is established and make all the executioner of flight test uses the exclusive airspace without limitation. This research proposes the restricted airspace with short term and long term establish requirement of airspace separately. The short term requirement has been established with the airspace of 10 nm radius and 8,000 ft altitude in which the requirements of flight test can be carried out more than 90% without needs of supplement of the additional airspace. The long term has been established within the airspace of 30 nm radius which is the maximum Radio Line Of Sight(RLOS) and 8,000 ft altitude with exclusion of current air way, airport control area, approaching corridor to the airport, existing restricted area(RA) and Military Operating Area(MOA) for the purpose of minimizing inconvenience of the other airspace user. Once establishing the exclusive airspace for the flight test of UA, research and development of industries, universities and research institutes will be more vigorous and contributes to the national economy.