• Journal of the Korea institute for structural maintenance and inspection
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• v.24 no.2
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• pp.9-14
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• 2020

Four developed patents have applied for a new type of Composite Cyclone Scrubber followed by the previous research (Cho and Kim, 2017), including dust reducing fan with filters. Regarding target installation and maintenance cost, 64% reduction for investment costs (6.2 billion won vs. 17 billion won) compared to existing road pollution reduction system, while social benefit costs increase by 43% compared to existing road pollution reduction measures (72.6 billion won vs. 50.8 billion won). The composition of the device is an air blower type spiral guide vane, and an injection pressure collecting dust efficiency. A nozzle varies Injection angle and contact range, spray liquid species (waterworks, salty water). The proposed patent tests are circulation water Time-by-Time Spray and collected 41.4% more increased micro dust since the sprayed water meets contaminated gas due to the 45° degree colliding, which is 141% increased conventional dust collector. (Ratio of collection over 85%). As regards the source of collection liquid, circulated rainwater and well water, we expect a huge amount of energy and economically saved eco-friendly system in our patent. Finally, the guided vane and metal filter reduced over 90% micro-dust, while sprayed water cleans the vane and filters, resultantly minimizing the maintenance budget. The preliminary evaluations of the developed design make it possible to reduce not only cheaper maintenance budget due to the characteristic water spraying but the cost of water comes from mainly rain and underground.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.3
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• pp.295-305
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• 1994

Greenhouse and laboratory studies were conducted to investigate the allelopathic potential of alfalfa and vetch residues on soybean and corn using various extract concentrations (0, 5, 10, 15 and 20%, w/v) and residue rates (0, 0.25, 0.5, 0.75 and 1%, w/w). Aqueous extracts of alfalfa (Medicago sativa L.) and vetch (Vicia spp.) exhibited an allelopathic effect on soybean and corn seed germination, seedling length and weight. The degree of inhibition significantly increased as the aqueous extract concentration increased. Alfalfa and vetch 20% extracts reduced soybean seed germination, seedling length and weight by 35%, 57%, 32% and 15%, 42%, 25% respectively, when compared to control. Corn germination, seedling length and weight was inhibited by 20%, 23%, 38% by alfalfa and 19%, 18%, 35% by 20% vetch extracts. Alfalfa and vetch extracts inhibited secondary root formation and branching as the extract concentration increased. Alfalfa and vetch 20% extracts inhibited by 41% and 32% secondary root numbers, respectively as compared to control. It was found that the aqueous extract of alfalfa resulted in greater reduction in germination, seedling length and weight of soybean than that of vetch. Alfalfa and vetch 1% residue rate inhibited soybean plant height by 30% and 10%, leaf area by 31% and 23%, and dry weight by 18% and 1%, nodule number by 27% and 20% also. Alfalfa and vetch residue significantly enhanced plant height, leaf area and dry weight of corn. The maximum stimulation occurred with 0.25% and 1% of alfalfa and vetch residue rates, respectively. Plant height, leaf area, and dry weight increased by 23%, 59%, 58% and 17%, 52%, 94% with alfalfa and vetch residues of 0.25% and 1%, respectively. This study demonstrates that there is an allelopathic potential resulting from alfalfa and vetch residues on soybean growth and yield. It also suggests that these residues may affect crop growth and development due to the inhibitory or stimulatory effects of allelochemicals existing in the residue.

• Proceedings of the KWS Conference
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• 2009.11a
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• pp.107-107
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• 2009

모듈 형 터빈 다이아프람은, 아우터 링(outer ring), 스팀 패스(steam path)와 이너 웹(inner web)의 원형 형상을 갖는 세 부분을 조립하여 원주 방향의 용접 조인트를 형성하는 기존의 다이아프람 형태가 아니라, 아우터 슈라우드(outer shroud), 베인(vane)과 이너 슈라우드(inner shroud)의 세 부분이 하나의 모듈을 이루고 이러한 모듈을 원주 방향으로 조립하여 방사 방향의 조인트를 형성한다. 전자빔 용접은 이와 같은 방사 방향의 조인트를 수직으로 가로지르는 용접 궤적을 따라 진행되며, 용접 패스에 따라 형성되는 용융 비드의 단면적만큼 인접하는 두 모듈을 접합시킨다. 이 경우 용융 비드의 단면적과 형상은 두 모듈의 결합 강도를 결정하는 중요한 요소가 되어, 제작 시 다이아프람의 크기와 두께에 따라 용입 깊이와 평균 단면 비드 폭을 규정하고 있다. 본 연구에서는 용입 깊이와 단면 비드 폭의 요구 조건을 만족하면서 결함이 없는 건전한 용접부를 얻을 수 있는 최적 용접 조건을 도출하는데 그 목적이 있다. 이를 위해 플레이트 시편과 모듈 시편을 사용한 기초 실험과 유사 시제품(semi-mockup) 실험을 실시하였다. 플레이트 기초 실험을 통해 전자빔 주요 변수인 빔 전류, 초점 위치, 용접 속도, 빔 진동 폭 변화에 따른 용융 비드 형상 변화를 관찰하였고, 빔 전류가 용입 깊이에 가장 큰 영향을 주는 인자임을 확인하여 요구 용입 깊이 별 적정 빔 전류 값을 설정하였다. 용접 속도는 생산성 측면에서 균열이 발생하지 않는 범위에서 가능하면 가장 큰 값을 사용하였고, 빔 진동 폭은 초점 위치와 함께 단면 비드 형상 결정에 많은 영향을 주는 인자로 확인되어 균열이 없는 가장 이상적인 단면 비드 형상인 완만한 쐐기 형태가 되도록 설정하였다. 이 후 실제 제품 폭과 용접 패스를 갖는 블록 모듈 실험을 통해 설정 용접 변수의 적용성과 균열 발생 여부를 확인하였고, 이 때 적용 제품 폭이 30 mm 이하이며 요구 용입 깊이가 50 mm 이상의 경우에서 비드 중앙부 균열이 발생함을 관찰하였다. 따라서 해당 영역의 제품에는 균열 저항성이 높도록 용접 속도와 빔 진동 폭을 줄여 최적 용접 변수를 새롭게 설정하였으며, 이를 유사 시제품 실험에 적용하여 최종적으로 용접 변수 안정성을 검증하였다. 이러한 실험을 통해 확인된 최적 용접 조건을 실 제품 제작에 적용하여 모듈 형 터빈 다이아프람 전자빔 용접 제작을 성공적으로 완료할 수 있었다.

• Journal of The Korean Society of Grassland and Forage Science
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• v.27 no.4
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• pp.257-262
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• 2007

The objective of this research was to develop a high yielding, early and medium-late flowering new hairy vetch(Vicia villosa Roth) varieties derived from an accession in Korea. Most vigorous early and medium-late flowering hairy vetch lines were selected and crossed by open pollination and their seeds were bulked and plants were reselected at Seongju in the Keongbuk and at Sacheon in the Keongnam. A performance trial was conducted to evaluate agronomic characteristics, forage quality and dry matter(DM) yield of new hairy vetch early-maturing 'Cold green' and medium-late maturing variety 'Cheong pa' at Seongju and Sacheon. 'Cold green' and 'Cheong pa' are hair but 'Haymaker plus' and 'Latigo' are nearly hairless. 'Cold green' has purple flowers while 'Cheong pa' has violet. The cold tolerance of 'Cold green,' 'Cheong pa' and 'Latigo' was higher than 'Haymaker plus' at Seong-ju, Keongbuk province, in inland region but there were a little differences at Sacheon, Keongnam province in southern coast region. Fifty percent-flowering dates of 'Cold green' and 'Haymaker plus' had earlier than others and 'Cheong pa' was earlier than 'Latigo'. The DM yield of 'Cold green' was higher than that of others, but 'Cheong pa' and 'Haymaker plus' had higher than 'Latigo' at Seong-ju(P<0.05). In Sacheon, The DM yield of 'Cold green' and 'Haymaker plus' was higher than others and 'Cheong pa' had higher than 'Latigo'.

• Journal of The Korean Society of Grassland and Forage Science
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• v.33 no.2
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• pp.117-122
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• 2013

This experiment was conducted to evaluate agronomic characteristics, forage quality, and dry matter (DM) yield of hairy vetch 'Cold green', common vetch 'Maxivesa', 'Wild common', 'Rasina', 'Morava', and 'Blanchefleur', at Seongju in Kyeongbuk from 2010 to 2012. The experiment was arranged in randomized complete block design with three replications. Vetchs were seeded on the 10th of Oct. 2010 and on the 3rd of Oct. 2011. Vetch plants were harvested on the 4th of May 2011 and on the 10th of May in 2012. 'Cold green' and 'Wild common' exhibited greater cold tolerance than other cultivars. Fifty percent-flowering of 'Cold green' occurred on the 22nd of Apr., whereas that of 'Wild common' occurred on the 26th of Apr. and those of 'Rasina' and 'Blanchefleur' occurred on 28th of Apr. and that of 'Maxivesa' occurred on 17th of May. The DM yield of 'Cold green' was higher (p<0.05) than all other cultivars, whereas the DM yield of 'Wild common' was higher (p<0.05) than those of the remaining 4 cultivars. According to the results obtained from this study, it is suggested 'Wild common' vetch is be recommendable for cultivation where increased DM production is sought.

• Journal of The Korean Society of Grassland and Forage Science
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• v.24 no.2
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• pp.177-182
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• 2004

This experiment was conducted to compare the agronomic characteristics and productivity inintroduced vetch cultivar at the experimental field of Grassland and Forage Crops Division, National Livestock Research Institute from 1999 to 2000. The experiment was arranged in a randomized block design with three replications. The vetch cultivar used in this study were 8 cultivar(Haymaker plus, Common, Capello, Namoi, Victa, Aneto, Popany, Korean milk vetch). Namoi, Victa and Aneto cultivar were died during winter. The cultivar having the fastest flowering date was Korean milk vetch while the flowering date of Common was the latest as 22th May. The average dry matter(DM) content was 14.7% and crude protein(CP) content was 20.9%. Common showed the highest CP content by 23.1% and Korean milk vetch showed the lowest content by 18.0%. Average acid detergent fiber(ADF) and neutral detergent fiber(NDF) content were 33.5 and 42.5% respectively. All cultivar showed the first grade of RFV(relative feed value). The productivity of vetch cultivar were severely different according to the winter hardness. Common showed the highest DM yield by 8,664kg/ha, but the DM yield of Capello and Popany were low by 3,004 and 2,114kg/ha, respectively. The yield of CP and TDN(total digestible nutrient) also was high at Common. The results of this experiments indicated that the productivity of vetch cultivar was effected greatly depending on winter hardness, therefore it was thought winter hardness is the main factor for introducing vetch cultivar.

• Journal of Service Research and Studies
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• v.9 no.2
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• pp.1-15
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• 2019

This study analyzed the service philosophy of Eastern mainstream thought in order to establish a service philosophy. Following a prior study the "study of the service philosophy of major korean ideology", we explored the service philosophy of the Eastern mainstream ideology of China and India and it's coherence. The existing basic structure and operational model of service philosophy were presented in depth and the service philosophy of Oriental mainstream thought was derived. The philosophy of service can be presented as an idea of the structure of the service and as an idea of the operation of the service. It suggested compatibility of the service philosophy of Asian mainstream ideas, and analyzed them mainly in China and India. Indian ideas revolved around the ancient philosophy of Veda, Upanishads philosophy, and representative Buddhist philosophy. It also showed that a major trend of mainstream ideas in China and India was found to be compatible with the service philosophy. Follow-up studies are needed to further refine the structure of service philosophy and develop the principles of operation into larger ideas in the future, and a study of conformity of service philosophy in representative Western ideas, focusing on Greek, Roman, and German philosophy, is also required. Ultimately, it is necessary to establish a service philosophy as an ideological base that drives future economic and social development.

• Proceedings of the Korean Journal of Food and Nutrition Conference
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• 1999.06a
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• pp.39-57
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• 1999

Chitin은 새우나 게 등을 비롯한 해산 갑각류의 가공 폐기물로 버려지는 부패, 악취발생 등의 환경공해를 일으키며 처리비용 등 여러 가지 문제를 야기하던 물질이지만 최근에는 부가가치가 높은 chitosan 및 chitooligosaccarides로 가공되기 때문에 폐기물의 자원화와 미이용 자원의 개발 등 여러 가지 측면에서 기대가 모아지고 있는 다당류이다. 더욱이 chitin의 탈아세틸화로 얻어지는 chitosan은 polycation의 성질을 가지고 있어서 현재 응집제로서 각종 공업 분야에 널리 이용되고 있으며 최근에는 그 외에도 다양한 생리적 기능성을 가지고 있다는 사실이 밝혀지면서 의료, 생호학, 화장품, 식품, 화학 공업 및 농업용 등 다양한 분야에 응용 가능한 신소재로서 기대가 높아지고 있다. 그런, chitosan은 생리적 기능은 우수하지만 물에 용해되지 않고 점도가 높으며 떫은맛이 나기 때문에 식품을 비롯한 기타 응용분야에 이용이 제한되고 있다. 따라서 많은 연구자들은 이와 같은 물리적인 장애를 개선함으로써 chitosan 자체가 갖는 우수한 생리적 기능을 이용할 뿐만 아니라 항종양성을 비롯한 새로운 생리적 기능을 갖는 chitosan 유도체의 개발을 시도하고 있다. Chitosan 유도체 중에서도 chitooligosaccharides는 chitosan의 가수분해로 얻어지는 저분자 화합물이므로 물에 잘 용해도며 점도가 낮고 용액이 단맛을 낼뿐만 아니라 chitosan이 갖지 않는 새로운 생리적 기능성을 갖는 것으로 알려지면서 관심이 집중되기 시작하였다. 본고에서는 chitosan과 chitooligosaccarides의 생리 활성 기능에 대한 지금까지의 연구결과를 소개하고자 한다.에 대한 면밀한 사안이 밝혀지는 경우가 많지 않다. 또한 그 발생 경위나 원인요소에 대해서는 일반에게 공개되지 않고 있어, 우리가 실천하여 식중독을 예방할 수 있는 정보가 함께 제시되지 못하는 형편이다. 따라서 본 고에서는 최근 수년간 외국에서 학교급식을 비롯한 집단급식 등에서 발생한 식중독 사례를 중심으로 고찰, 분석하였다. 이로부터 식중독 발생에 기여한 주요 원인을 찾아내고 여기서 얻어지는 교훈을 토대로 식중독 발생을 예방 및 최소화할 수 있는 실천적 대처 방안을 모색해 보고자 한다.중의 E. coli O157:H7이 연관되어있다는 보고도 있다. 목장 방문시 원유를 마신 어린이에서 HUS가 유발하였고, 균분리 결과, 농장의 소와 어린이에서 유사한 E. coli O157:H7이 분리된 바 있다. 본 연자들은 베로톡신 유형, plasmid profiles, RFLP 분석, phage type을 기초로하여 소에서 분리된 E. coli O157:H7이 사람유래주와 매우 유사함을 확인하였다.mm 및 2-6mm 난포에서의 101개(67.8%) 및 47개(50.0%) 보다 매우 낮게 나타났다. 전체 회수 난포란수도 4등급이 59.1%(149/252)로써 1, 2, 3등급의 0.4% (1/252), 7.6%(19/252) 및 32.9%(83/252)보다 높게 나타났다. 1회 평균 회수 난포란은 $\leq$2mm 난포에서 4.8$\pm$3.7개로써 2-6mm(3.0$\pm$3.4개) 및 $\geq$6mm (0.3$\pm$0.6개)보다 높았으며, 1회당 평균 8.1$\pm$5.1개의 난포란을 회수하였다. in

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.5
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• pp.899-904
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• 2002

Aloe and propolis are extensively used in folk medicine. Ethanol extracts of Aloe vera (AE), ethanol extract of propolis (PE) and waxfree extract of propolis (PW) were prepared to test antimicrobial activities against five oral microorganisms (Streptococcus mutans, Enterococcus faecalis, Enteococcus hirae, Escherichia coli, Candida albicans). Antimicrobial activities were tested by serial broth dilution method and expressed by minimal inhibitory concentration (MIC). The AE showed relatively weak antimicrobial activities, while both of PE and PW greatly inhibited all microorganisms tested. To investigate the antimicrobial effects of the combined extracts of aloe with propolis, the fractional inhibitory concentration index (FICI) was determined by checkerboard assay for each strain. The combination of AE with PE or PW resulted in Synergistic effect against oral microorganisms tested (FICI=0.375) except Escherichia coli (FICI=1.0 for PE, FICI=0.75 for PW).

• Spatial Information Research
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• v.17 no.3
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• pp.341-350
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• 2009

As the power and scale of typhoons are growing due to global warming and socioeconomic damages induced by super-typhoons are increasing, it is important to estimate inundation damages and to prepare proper adaptation plans against an attack of the super-typhoon. In this paper, we estimated the inundation damages of urban area around Haeundae beach induced by super-typhoons which follow the route of Typhoon Maemi with the conditions of Typhoon Vera (Ise Bay in Japan, 1959), Typhoon Durian (Philippine, 2006) and Hurricane Katrina (New Oleans in U.S.A, 2005). The coastal area around the Haeundae beach (Busan and Gyeongnam province) is expectedly damaged by severe storm surges. In this study we calculated the rise of sea level height after harmonizing the different datum levels of land and ocean and estimated the inundation depth, inundation area and the amount of building damages by using airborne LiDAR data and GIS spatial analysis techniques more accurately and quantitatively. As many researchers are predicting that super-typhoon of overwhelming power will occur around the Korean peninsula in the near future, the results of this study are expected to contribute to producing coastal inundation map and evacuation planning.