• 정보와 통신
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• 제27권4호
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• pp.17-22
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• 2010

본고에서는 스마트그리드의 수요 측면을 구성하며, 최종 소비자와 전력사사이의 전력 정보서비스 인프라이고 소비자의 능동적인 에너지 절감을 위한 수요 반응(Demand Response)실현의 핵심 수단인 AMI (Advanced Metering Infrastructure)의 그 구조와 기술 동향에 대해 알아본다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2001년도 하계 학술대회 논문집
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• pp.59-65
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• 2001

• 한국관개배수논문집
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• 제2권1호
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• pp.101-107
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• 1995

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.515-517
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• 2002

• 수도
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• 통권26호
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• pp.26-28
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• 1981

이 글은 국제수도협회(IWSA) 주최 국제수도회의 수도미터 및 계량상임위원회(International standing comittee on water meter and water metering)에서 벨기에의 A. Desmed가 발표한 내용을 번역 게재한다.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2002년도 제1회 정기총회 및 학술대회
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• pp.5-8
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• 2002

• 대한전기학회:학술대회논문집
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• 대한전기학회 1983년도 하계학술회의강연.논문초록집
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• pp.232-233
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• 1983

• 정보과학회지
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• 제27권11호
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• pp.93-97
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• 2009

• 드라이브 ㆍ 컨트롤
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• 제15권4호
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• pp.113-118
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• 2018

• Journal of Biosystems Engineering
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• 제41권1호
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• pp.21-33
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• 2016

Purpose: In order to ensure that vegetable seedlings (with a soil block around their roots) are planted in an upright orientation after metering in a vegetable transplanter, they need to be dropped freely from a certain height. The walk-behind hand-tractor-powered machines do not have sufficient space to drop the seedlings from that height. In the present work, a hopper-type planting device was developed for the walk-behind hand-tractor-powered vegetable transplanter to ensure that the soil block seedlings are planted in an upright orientation. Methods: Various dimensionless terms were developed based on the dimensional analysis approach, and their effect on the planting of soil block seedlings in an upright orientation (planting efficiency) was studied. The optimum design dimensions of the hopper-type planting device were identified by the Taguchi method of optimization. Results: The ratio of the height of free fall to the sliding distance of the seedling on the surface of the hopper had the highest influence on planting efficiency. The planting efficiency was highest for plants with a height $15{\pm}2cm$. The plant handling Froude number, in interaction with the design of the hopper-type planting device, also significantly affected the planting efficiency. Of the hopper design factors, the length of the slide of the seedlings on the surface of the hopper was most important, and induced sufficient velocity and rotation to cause the seedling to fall in an upright orientation. An evaluation of the performance of the planting device under actual field conditions revealed that the planting efficiency of the developed planting device was more than 97.5%. Conclusions: As the seedlings were fed to the metering device manually, an increase in planting rate increased missed plantings. The planting device can be adopted for any vegetable transplanter in which the seedlings are allowed to drop freely from the metering device.