• Proceedings of the Korean Society of Crop Science Conference
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• 2007.11a
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• pp.199.2-199.2
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• 2007

• Proceedings of the Korean Society of Crop Science Conference
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• 2018.04a
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• pp.124-124
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• 2018

• Proceedings of the Korean Society of Crop Science Conference
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• 2018.04a
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• pp.211-211
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• 2018

• Feed Journal
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• v.4 no.3 s.31
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• pp.68-72
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• 2006

금월부터는 각론으로 가축별 사료급이기(양계, 양돈, 낙농-육우용 급이기, 개체인식 급이기)의 이용현황과 전망, 사료 저장빈의 새 기술, 사료생산 장비의 기술개발(사료작물수확시, 모어, 베일러, 래퍼, 베일커터)현황, 사료가공장비(사료배합기, 사료가공기계)의 순으로 내용을 살펴보고자 한다.

• KOREAN POULTRY JOURNAL
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• v.24 no.12 s.278
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• pp.91-95
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• 1992

한때 악취나고 파리가 들끓는 오염물로 여겨지던 계분이 이제는 적량의 화학미량원소가 첨가되어 귀중한 유기질 비료가 되었다. 이와같은 변신을 21년에 걸쳐서 이룩하게 된 것은 시드니 라우스-힐에 사는 N.제닝스씨의 끈기와 능력의 결실이다. 오늘날 노-옴이라고 불리는 제닝스씨는 키가 크고, 머리가 희끗희끗한, 기계공학도에서 시작한 양계가로서 건조계분 생산의 선구자로 국제적으로 인정받고 있으며 세계 최대의 유기질 비료생산 체제를 콘트롤 하고 있다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2019.04a
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• pp.79-79
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• 2019

• Journal of Bio-Environment Control
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• v.7 no.3
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• pp.226-236
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• 1998

If the lowest leaves of the cucumber were removed or training cultivable method was changed, a computer vision system could divide well the cucumber fruit from the others, and also an end-effector could reach and grip cucumber fruit and cut well its fruit stalk. Therefore, this study investigated whether removal leaves and training cultivable method of a cucumber could affect its growth and yield. They can help to be designed the vision system and the end-effector. A cucumber fruit grew by 6-l5cm long for 2 days regardless of removing leaves. Removal leaves didn't affect growth of cucumber fruit. Number of cucumber fruit was produced within 10% different values by three methods (A, B, C) of removal leaves. The first grade rate (best quality) of 4 B and C was 56.7%, 53.1%, 56.3% respectively. Consequently, proper removal leaves were better than traditional way, which does not remove a leaf, because they make cucumber plant ventilate more freely and absorb more light.

• Korean Journal of Medicinal Crop Science
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• v.5 no.4
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• pp.284-288
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• 1997

In order to study on suitable harvest time of adlay utilizing self-feeding combine harvester with four rows, which is originally designed for rice harvest, harvesting were carried out at four different times (40, 50, 60 and 70 days after anthesis) . For efficient operation, appropriate working rows were 2 rows at 50 days after anthesis and working speed was 0.26m/sec at 60 days after anthesis. Theoretical working capability was 11.23a/hr at 60 days after anthesis. As the harvesting was delayed, water content of adlay decreased. Water content of culm+leaf was $69.7{\sim}55.3%$ and water content of grain was 34.2% at 60 days after anthesis. The later adlay was harvested. the higher the percent of ripened grain was. But the immature grain was decreased. Remnants was less than 1.8% at 60 days after anthesis. The later adlay was harvested, the heavier volume weight was. Yield was the highest at 60 days after anthesis. When utilizing self-feeding combine harvester with four rows, which was originally designed for rice harvest, suitable harvesting time was 60 days after anthesis. Therefore, theoretically suitable harvest time was 68 days after anthesis.

• The Journal of the Acoustical Society of Korea
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• v.42 no.1
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• pp.57-66
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• 2023

In this paper, it was investigated how the amount of energy harvesting will be varied from the FTEH which has inlet area is wider than outer area and attaching cantilever type MFC (Macro Fiber Composite) using by theoretical and experimental approaches. When MFC length increased 50 % vibration displacement also increased 3.5 times. When thickness decreased vibration displacement increased 30.9 times. In underwater tank experiments FTEH with spiral screw, flexible support, vertical direction fabrication cases showed maximum energy harvesting more 5 times than the case of MFC installed horizontally without spiral screws and on rigid supports. When the flow speed of 0.24 m/s FTEH's optimal resistance applied 4,10 kΩ, energy storage in the capacitor was measured 4 ㎼·s during 350 seconds. It was confirmed that the charging energy can be increased by lengthening the capacitor charging time of the large-area MFC installed vertically on the flexible support at high flow speed.

• Journal of Power System Engineering
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• v.13 no.3
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• pp.65-71
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• 2009

This paper presents the energy harvesting technique which is carried out by vibration system with a piezoelectric element. In this study, low frequency characteristics of the piezoelectric element bonded to the aluminum cantilever were experimentally investigated. The piezoelectric element of size of $45L{\times}11W{\times}0.6H$ and piezoelectric constant($d_{31}$ ) of $-180{\times}10^{-12}C/N$ was used. The material of cantilever is an aluminum and two kinds of cantilever of which dimensions are (150, 190)$[mm]{\times}13[mm]{\times}1.5[mm]$ were experimented, respectively. The cantilever was fixed on the magnetic type vibrator and the vibrator was operated by power input with a sine wave. The characteristics of requency and mass variation of cantilever end part such as 0, 2.22, 4.34, 5.87, 8.66, 11.01 [g] were investigated. Finally, this paper suggests a method of generating electrical energy with a piezoelectric element using wind, an energy source that is easily applied and from which we can obtain "clean" energy.