• KOREAN JOURNAL OF CROP SCIENCE
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• v.66 no.4
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• pp.435-442
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• 2021

This study was conducted to determine an appropriate coating method for mechanized sowing of small and light Italian ryegrass seeds. In the case of manufacturing coated seeds, 2% PVA was superior as an adhesive compared to PVP and Tween80. Calcium carbonate + talc adhered to the seeds smoothly and well and the seed weight was higher than that of the other coating materials. The germination percentage of seeds coated with calcium carbonate + talc was 95.8%, which was not significantly different from 96.5% of the control group, but the mean daily germination was the highest. As the coverage ratio of calcium carbonate + talc increased, the strength tended to increase when coated at 1.5 times the seed weight. There was no difference in the germination rate and plant height compared to the control group according to the coverage ratio.

• Korean Journal of Weed Science
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• v.3 no.1
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• pp.105-110
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• 1983

In order to select the effective herbicides on polyethylene film mulching culture of galic (Allium sativum L) for weed control in early and low temperature condition, several experiments were conducted at the Chungbuk Provincial Office of Rural Development from 1978 to 1982. The dominated weed in the open field was Chenopodium album (98.1%), and there were many Rvrippa globosas (39.7%), and Dtgitaria sanguinalis (34.3%) in the polyethylene film mulching culture. Effective herbicides in polyethylene film culture were alachlor EC, pendimethalin EC, oxyfluorfen EC, and acifluorfen EC. After the 15th May, metabenzthiazuron WP and prometryne WP for the gramineous weeds were effective. There was a little chemical injury on acifluorfen EC application, but not another influence on the yield. With the effective herbicides application in the polyethylene film mulching culture, yield (22-23%) and profits (26.84) to the nonmuiching culture were increased. Increase of yield (20%) and profits (56%) in black opaque polyethylene film mulching culture compared with the conventional culture was possible.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2000.09a
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• pp.171-175
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• 2000

국내 시공사례가 가장 많은 사석식 경사제는 피복층(cover layer), 중간피복층(underlayer), 그리고 내부사석(core and bedding layer)으로 이루어져 있다. 이 중 중간피복층의 재료는, 피복재의 중량(W)에 대한 중량비 W/10에서 W/15의 자연석을 이용하여 시공하는 것이 보통이다. 그러나, 항만의 대형화에 따른 설계파의 증가로 이형블록과 같은 피복재의 소요 중량이 증가하는 추세이며 이에 따른 중간피복재의 소요중량도 크게 되어 그에 만즌 자연석을 구하기 어려운 실정이다. (중략)

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.347-353
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• 2023

Currently, soldiers enlisted in the military (Army) are receiving measurements (automatic, manual) of body parts and trying on sample clothing at boot training centers, and then receiving clothing in the desired size. Due to the low accuracy of the measured size during the measurement process, in the military, which uses a relatively more detailed sizing system than civilian casual clothes, the supplied clothes do not fit properly, so the frequency of changing the clothes is very frequent. In addition, there is a problem in that inventory is managed inefficiently by applying the measurement system based on the old generation body shape data collected more than a decade ago without reflecting the western-changed body type change of the MZ generation. That is, military uniforms of the necessary size are insufficient, and many unnecessary-sized military uniforms are in stock. Therefore, in order to reduce the frequency of clothing replacement and improve the efficiency of stock management, deep learning-based automatic measurement of body size, big data analysis, and machine learning-based "Personalized Combat Uniform Automatic Recommendation System for Enlisted Soldiers" is proposed.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.35 no.5
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• pp.102-108
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• 2023

In this study, hydraulic model tests were performed to investigate the stability of armor units at harbor side slope for rubble mound structures. The armor units on the rear slope were rocks. The Korean design standard for harbor and fishery port suggested the design figures that showed the ratio of the armor weight for each location of rubble mound structures and it could be known that the same weight ratio was needed to the sea side and rear side slope of rubble mound structures. The crest elements were commonly applied to the design process of rubble mound structures in Korea and the investigation of the effects of super structures would be needed. The damage rate (S =2) was applied and the stable wave height was measured for each test condition. The results were suggested as the armor weight ratio of the rear side slope(armor rock) to the sea side slope (tetrapod) in relation to the relative crest height.

• Korean Journal of Weed Science
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• v.4 no.1
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• pp.79-87
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• 1984

Herbicidal effects of alachlor to peanuts were observed under different formulations (granule containing 5.0% a.i. and emulsifiable concentrate containing 43.7% a.i.) and levels (granule with 3 and 6kg/l0a and emulsion with 300㏄/l0a) with the transparent polyethylene (P.E.) film mulching. Formulations and levels of alachlor did not affect emergence ratio, time of emergence and flowering, and early growth of peanuts such as the number of leaves and branches, length of branches; and shoot dry weight at 20 and 40 days after planting, but early growth was enhanced by P.E. film mulching. At harvest, weed dry weight was positively correlated with length of branches, but negatively correlated with the number of branches and shoot dry weight. Acalyphu australis and Chenopodium album were not effectively controlled by the application of alachlor and growth of C. album was retarded under P.E. film mulching. Portulaca oleracea and Digitaria sanguinalis were effectively controlled by alachlor, but they were not affected by P.E. film mulching. At harvest, D. sanguinalis, A. australis, and Echinochloa crus galli were predominant weeds in all treatments; persistence of alachlor may not be long enough to control even sensitive weeds to alachlor such as D, sanguinalis in the field of peanuts of which canopy development was relatively slow. Weed dry weight at harvest was negatively correlated with the number of pods and grain yield of peanuts. Among the yield components only the number of nods per plant was positively correlated with grain yield. Hana weeding after July 1 increased grain yield of Peanuts even in alchlor applied plots.

• Journal of Korean Electronics
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• v.4 no.12
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• pp.81-87
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• 1984

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2000.11a
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• pp.47-47
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• 2000

• Korean Journal of Environmental Agriculture
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• v.7 no.1
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• pp.14-20
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• 1988

The effect of polyethylene film(P.E.) mulching on the degradation of alachlor(N-methoxymethyl-2, 6-diethyl ${\alpha}-chloroacetoanilide$), pendimethalin(3, 4-dimethyl-2, 6-dinitro-N-l-ethylpropylanilide) and diphenamid(N,N-dimethyl-2, 2-diphenylacetamide) in red pepper, peanut, and sesame fields was investigated. In soils under the non-mulching condition the half-lives of alachlor, pendimethalin and diphenamid were 3, 37 and $24{\sim}46$ days, respectively. However, the half-lives of those under the P.E. mulching condition were longer than under the non-mulching condition. The differences in the half-lives between P.E. mulching and non-mulching conditions were about 30 days for pendimethalin and from 20 to 90 days for diphenamid. However, the half-life of alachlor was hardly affected by P.E. mulching. Pendimethalin and alachlor were not detected in the harvasted red peppers, peanuts and sesame under P.E. mulching and non-mulching conditions. But, the residue of diphenamid in peanuts was 0. 147 ppm under the P.E. mulching condition and 0.071 ppm under the non-mulching condition, and the residue of diphenamid in sesame was 0.022 ppm under the P.E. mulching condition and 0.129 ppm under the non-mulching condition. The amounts, however, were below the tolerance limits for pesticide residue.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.103-106
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• 2011

국토해양부령 제320호인 건축물의 피난 방화구조 등의 기준에 관한 규칙 제 3조에서는 내화구조에 관한 세부기준을 정하고 있다. 이러한 법정내화구조 중에서 철골철망 모르타르조의 피복두께에 따른 내화성능 변화를 분석하기 위하여, 본 연구에서는 고온 재하하중조건에서 내화실험을 수행하였다. 철골조의 피복두께를 50 mm ${\cdot}$ 60 mm ${\cdot}$ 70 mm로 변화하여 내화실험을 수행하였으며, 재하하중비를 변화시킴으로 동일 피복두께에서의 내화성능 변화를 분석하고자 하였다. 실험결과 단면소성모멘트 대비 하중비 0.4 조건에서의 철골철망 모르타르조의 내화성능은 180분이 나왔으며, 피난 방화구조 등의 기준의 별표 1에서 정하고 있는 내화구조의 성능기준 중 최대 내화성능시간인 3시간을 확보하는 것으로 나타났다.