• Animal Systematics, Evolution and Diversity
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• 제35권2호
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• pp.73-75
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• 2019

Members of this family Sciomyzidae are known as marsh flies and snail-killing flies because most of the known larvae are obligate predators of Mollusca, especially freshwater and terrestrial Gastropoda. Most species are found in the shallow ephemeral aquatic habitats with rich organic substrates, such as the hard-water streams, small ponds and lakes in mountain valleys. To date, a total of 8 marsh fly species in 4 genera have been known in Korea. During a taxonomic survey of the family Sciomyzidae in Korea, the authors have found the genus Ditaeniella Sack, 1939; thus, it was discovered for the first time in Korea. This genus can be distinguished by the other related taxa with hairs over much of the mesopleuri, hairs on the prosternum and one orbital seta. In addition, the nominate species, Ditaeniella grisescens Meigen, 1830 was also firstly recoded in the Korean fauna.

• 한국패류학회지
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• 제30권2호
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• pp.107-116
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• 2014

북한강에 서식하고 있는 엷은재첩의 산란생태를 파악하기 위하여, 생식소 발달단계에 따른 생식주기, 군성숙도, 난경의 월별변화를 조사하였다. 각장에 대한 각고, 각폭, 전중, 육중간 의 상대성장식에서 상관계수 ($R^2$) 는 0.921-0.984로 높은 상관관계를 나타내었다. 엷은재첩은 기수재첩 보다는 소형종이었으며, 동시자웅동체로서 체내에서 수정되어 아가미 보육낭에서 부화되어 체외로 방출하는 난태생종이었다. 월별 비만도는 0.14-0.21 범위로 동계인 12월-2월에 낮은 값을 보이다가 2월부터 서서히 높아지기 시작하여 5월에 0.21로 정점을 보였다. 월별 육중량비는 25.9-38.7%로 비만도의 월별 변화와 같은 경향을 나타내었다. 비만도와 육중량비의 정점이 생식세포의 최성숙기와 1-2개월 차이가 있었다. 생식소의 조직상, 비만도 및 생식세포의 월별 변화를 종합하면 북한강산 엷은재첩 생식년주기는 분열증식기(12-2월), 성장기(2-5월), 성숙기(6-8월), 완숙 및 발생기(8-11월), 회복기(11-12월) 로 구분되어 하계산란종이었다. 군성숙 각장은 12.6 mm 였으며, 16 mm 이상의 개체는 모두 성숙하여 아가미에 보육낭을 형성하였다.

• 한국식품영양학회지
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• 제29권5호
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• pp.670-676
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• 2016

서기 530년부터 1950년까지의 고조리서 32권에 수록된 장 만드는 방법 중 메주 만드는 방법을 언급한 225가지 중 재료의 가열방법, 메주의 형태, 메주를 띄우는데 사용하는 용기, 덮개 및 깔개를 분석하였다. 그 결과 전통 메주의 콩이나 전분질의 가열 방법은 찌기 57가지, 삶기 58가지, 볶아 삶기 21가지, 밥짓기 2가지의 순으로 나타났다. 메주의 형태는 알 41가지, 구형 27가지, 덩어리 22가지, 칼자루형 8가지, 납작형 6가지, 쪼가리형 4가지, 구멍형 1가지, 사각형 1가지의 순으로 나타났다. 고추장 메주 72가지 중 콩 가열 방법은 삶기 9가지, 찌기 6가지의 순이었고, 전분질의 가열방법은 떡찌기 19가지, 밥 짓기 11가지, 익반죽 삶기 5가지의 순으로 나타났다. 콩메주 띄우는 용기는, 가마니 섬 섶 49가지, 독 5가지, 둥구미 멱서리 14가지, 온돌 11가지, 소쿠리 채반 광주리 7가지, 독 5가지, 흙도랑 4가지, 시루 오쟁이 3가지, 바가지 2가지, 시루 2가지, 용수 1가지의 순으로 나타났다. 메주 띄우기용 덮개나 깔개는 짚 36가지, 닥나무잎 17가지, 멍석 거적 자리 15가지, 쑥 14가지, 솔잎 11가지, 콩잎 10가지, 도꼬마리잎 6가지, 북나무잎 6가지, 보릿짚 6가지, 뽕잎 6가지, 가랑잎 5가지, 띠풀 5가지, 삿자리 4가지, 헝겊 3가지, 개오동나무잎 2가지, 갈잎 1가지의 순으로 나타났다. 매달기는 5가지 밖에 없었다.

• 한국환경농학회지
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• 제9권2호
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• pp.143-151
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• 1990

배양액(培養液) 및 배지(培地)의 종류(種類)를 달리하여 수행(遂行)한 양액재배(養液栽培) 실험(實驗)에 있어서 오이(Cucumis sativus L.)와 토마토(Lycopersicon esculentum MILL)의 생육(生育)과 품질(品質)에 미치는 영향(影響)을 조사(調査)한 바 그에 대한 실험(實驗) 결과(結果)를 요약하면 다음과 같다. 1. 오이와 토마토의 생육(生育) 및 수량(收量)은 Cooper액(液)을 이용(利用)한 암선재배(岩線栽培)에서 가장 높게 나타났다. 2. 복합비료(複合肥料) 양액(養液)을 이용(利用)한 암선재배(岩線栽培) 시(時) 생육(生育) 및 수(收量)은 sand-sack culture에서 가장 양호(良好)하였다. 3. 복합비료(複合肥料) 양액(養液)을 사용(利用)한 암선재배(岩線栽培) 시(時) 초기생육(初期生育)에는 토양재배(土壤栽培)보다는 좋았으나 후기생육(後期生育)은 점차 낮아지는 결과(結果)를 나타내었다. 4. 오이와 토마토의 과실내(果實內) vitamin C함량(含量)은 토양재배(土壤栽培)와 비교(比較) 시(時) 복합비료양액(複合肥料養液)을 사용(利用)한 암선재배구(岩線栽培區)를 제외하고 나머지 처리구(處理區)에서는 차이가 없었다. 5. 오이 및 토마토 건물중(乾物重), total-N 및 무기성분(無機成分)의 함량(含量)에서 각 처리구별(處理區別) 뚜렷한 차이는 나타나지 않았다.

• Ocean Systems Engineering
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• 제4권4호
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• pp.309-325
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• 2014

Geotextile tubes are basically a huge sack filled with sand or dredged soil. Geotextile tubes are made of permeable woven or non-woven synthetic fibers (i.e., polyester or PET and polypropylene or PP). The geotextile tubes' performances in strength, dewatering, retaining solid particles and stacked stability have been studied extensively in the past. However, only little research has been done in the observation of the deformation behavior of geotextile tubes. In this paper, a large-scale apparatus for geotextile tube experiment is introduced. The apparatus is equipped with a slurry mixing station, pumping and delivery station, an observation station and a data station. For this study the large-scale apparatus was utilized in the studies regarding the stresses on the geotextile and the deformation behavior of the geotextile tube. Model tests were conducted using a custom-made woven geotextile tubes. Load cells placed at the inner belly of the geotextile tube to monitor the total soil pressure. Strain gauges were also placed on the outer skin of the tube to measure the geotextile strain. The pressure and strain sensors are attached to a data logger that sends the collected data to a desktop computer. The experiment results showed that the maximum geotextile strain occurs at the sides of the tube and the soil pressure distribution varies at each geotextile tube section.

• 한국의류산업학회지
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• 제14권6호
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• pp.918-927
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• 2012

This study identified the aesthetic characteristics of the face description in late Joseon Dynasty beauty paintings. A total of 24 beauty paintings were selected as representative of the late Joseon Dynasty genre of painting works. The paintings were analyzed by the shape, color, and physiognomy of beauty trends from the components of women's faces expressed in the works of artists. The results of this study showed that the shape of the face components expressed a round, curved and thin line. Colors were expressed through Obang-sack (a traditional Korean color). Also the physiognomy of the late Joseon Dynasty's women was soft, wise, economical and brilliant. A round-forehead meant that economical and virtuous housekeeper, thin crescent shaped eyebrows denoted women of wisdom and excellent sensitivity. Single long thin eyelids and implied a women of longevity. A round curved nose were eager tobe a wise mother and a good wife. Small concave lips were desired eagerly by gentle and intelligent women. A curve face implied a subjective women of insight and good memory. In conclusion, the late Joseon Dynasty beauty paintings expressed a traditional Korean beauty face and a modern baby face. The data are useful for the aesthetic standards of modern through meaning of Korean traditional beauty.

• 펄프종이기술
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• 제37권3호
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• pp.50-58
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• 2005

It is generally known that paper industry is the second largest industry in the use of process water, and also have the highest environmental impact load in the contaminant sources. Paper is produced from the mixtures composed of 1% fibrous raw materials and 99% water. The optimum use of process water effects on the quality properties of paper and the environmental impact load of waste water treatment. In this research, the kinds of fibrous raw material & additives used in the paperboard production line were investigated, and the quantification of environmental loads and the environmental effects of process water on COD potential were evaluated. The NBDCODs were also analyzed from process water by the method of waste water treatment in paper mill and applied for the optimum use of recycling water, and zero effluent process. In the fibrous raw materials, KOCC caused the highest COD potentials, and sack paper & UKP was comparatively low. The NBDCOD of KOCC largely reduced after biological treatment because of easily biodegradable properties, but AOCC contained non-biodegradable materials. In chemical additives, COD was high in turns of rosin>starch>deaeration agent>dye, NBDCOD greatly reduced in starch and deaeration agent. In the case of 2 kinds of paperboard product, the COD potentials was mainly high in starch, AOCC and KOCC.

• 펄프종이기술
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• 제42권3호
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• pp.50-57
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• 2010

A mill trial was performed in a kraft paper mill in order to evaluate the possibility of utilizing dual polymer dry strength aids system consisting of cationic PVAm and anionic PAM. It was found that the cationic PVAm - anionic PAM dry strength additives can improve paper strength without significantly disturbing the stability of the kraft papermaking process when virgin UKP was used as a furnish. Tensile strength (25.3% in machine direction, 48.4% in cross machine direction), elongation of paper (31.6%, 15.6%) and tensile energy absorption (48%, 54%) were improved. Air permeability of the kraft paper was improved as well (22%). Tear strength was decreased with PVAm dry strength aids system, but it can be compensated with decreasing refining degree. In addition, the mill trial results indicate that highly air permeable kraft sack paper can be produced by the addition of PVAm dry strength agents at the stock with reduced freeness.

• 화약ㆍ발파
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• 제25권1호
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• pp.15-29
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• 2007

고준위폐기물 처분연구를 위해 원자력연구원 내에 건설된 지하처분연구시설(KURT)에서 발파에 의해 발생하는 암반 손상대의 규모를 평가하기 위한 실험실 시험과 현장시험이 실시되었다. 실험실 시험결과 및 현장 시험결과 터널 벽면에서의 손상대는 1m 이상까지 발생하는 것으로 나타났다. 발파의 영향을 받은 구간($0{\sim}2(m)$)에서 회수된 암석 코아의 RQD 값은 발파영향을 받지 않은 구간에 비해 17% 낮게 나타났으며, 발파 후 암반 변형계수는 발파 전에 비해 약 40% 감소되는 것으로 나타났다.

• 한국응용과학기술학회지
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• 제30권3호
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• pp.540-550
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• 2013

Various efforts have been explored to save the cost in many industrial fields. In order to recover the residual thermal energy from the flue gas, an extreme high efficiency heat exchanger is planning to install at a power plant. The gas temperature will be reduced to $40^{\circ}C$ from $115^{\circ}C$. Thus gas buoyancy decreases, and dispersion of nitrogen oxides is expected to deteriorate as increasing relative humidity. In this study, the conversion of nitrogen monoxide to nitrogen dioxide and dispersion regime are investigated through computational modeling. Nitrogen dioxide which indicates 0.1 ppm at 85 m from the ground could be propagated to 620 m at $115^{\circ}C$ of the flue gas, whilst when cooled down to $40^{\circ}C$, it expands up to 750 m. The ground level influence area showed more expansion of dispersion, approximately to 930 m.