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산청지역에서 파종량 및 질소 시비량에 따른 호밀의 생육과 종실 수량
김종성,김진진,한옥규,Kim, J.S.,Kim, J.J.,Han, O.K. 국립한국농수산대학교 교육개발센터 2020 현장농업연구지 = Journal of practical agricultural resear Vol.22 No.2
This experiment was conducted at Sancheong from 2013 to 2015. The objective of this study was to establish the seeding rate, and to clarify the optimum nitrogen fertilizer level for rye seed production in the southern area of Korea. We employed Korean rye cultivar 'Gogu' in this test. The experimental design was a split-plot design with three replications. A split-plot design was used with three seeding levels (3, 5, and 7 kg 10 a<sup>-1</sup>) on the main plots and other treatments fully randomized in sub-plots. A factorial arrangement of treatments included three different nitrogen fertilizer levels (0, 3, 6, and 9 kg 10 a<sup>-1</sup>). The grain yields of rye affected by increasing the seeding rate. The number of spike per m<sup>2</sup> and immature grain weight was increasing, while the fertility rate and the number of grain per spike were decreased as seeding rate were increased from 3 kg 10 a<sup>-1</sup> to 7 kg 10 a<sup>-1</sup>. The percentage of a productive tiller, 1-liter weight, and 1000-grain weight also decrease by increasing seeding but the grain yields of rye had less effect. There was an increase in the number of spike per m<sup>2</sup>, the number of grain per spike, and grain yields as nitrogen fertilizer level was increased from 0 kg 10 a<sup>-1</sup> to 9 kg 10 a<sup>-1</sup> and followed a delaying heading and an increasing lodging of the plant. But grain yields did not affected by the interaction of seeding rate × nitrogen fertilizer levels. The best seeding rate and nitrogen fertilizer level for rye seed production were 5 kg and 3 kg 10 a<sup>-1</sup>, respectively, considering seed and fertilizer reduction and the prevention of pollution by excess fertilization. 국내에서 소비지역에 필요한 호밀 종자를 생산하기 위해 경남지역에 적합한 종자 채종기술을 개발하고자 2013~2015년까지 3개년에 걸쳐 경상남도 산청에서 시험을 실시하였다. 품종은 국내 육성종인 곡우호밀을 사용하였고, 시험구는 파종량 3수준(3, 5, 7 kg 10 a<sup>-1</sup>), 질소시비량 4수준(0, 3, 6, 9 kg 10 a<sup>-1</sup>)의 분할구배치법 3반복으로 하였으며, 생육특성과 종실 생산성을 평가하였다. 호밀 종자의 파종량을 3 kg 10 a<sup>-1</sup>로부터 7 kg 10 a<sup>-1</sup>로 증가시킴에 따라 설립중이 증가하고 임실률과 1 수립수가 감소하였지만 m<sup>2</sup>당수수가 증가하여 전체 수량이 증가하는 경향이었다. 그리고 유효경비율, 리터중, 1000립중이 다소 감소하였으나 수량에는 영향이 크지 않았다. 질소 시비량을 무비로부터 9 kg 10 a<sup>-1</sup>로 증가시킴에 따라 출수기가 늦어지고 도복이 다소 증가하지만, m<sup>2</sup>당수수와 1수립수가 많아져서 수량이 증가하였다. 그리고 호밀의 종실 수량은 파종량과 질소 시비량 간에 교호작용을 보이지 않았다. 호밀의 종실 수량, 파종용 종자 비용과 질소 과잉 시비에 따른 환경오염, 도복 등을 고려할 때 산청지역에서 호밀 종자생산을 위해 적합한 파종량은 5 kg 10 a<sup>-1</sup>, 질소 시비량은 3 kg 10 a<sup>-1</sup>로 추천되었다.
김종성,장시환,양성일,윤민성,Kim, J.S.,Jang, S.H.,Yang, S.I.,Yoon, M.S. 한국전자통신연구원 2021 전자통신동향분석 Vol.36 No.4
Outdoor sports activities have been restricted by serious air pollution, such as fine dust and yellow dust, and abnormal meteorological change, such as heatwave and heavy snow. These environmental problems have rapidly increased the demand for indoor sports activities. Virtual sports, such as virtual golf, virtual baseball, virtual soccer, etc., allow playing various sports games without going outdoors. Indoor sports industries and markets have seen rapid growth since the advent of virtual sports. Most virtual sports platforms use screen-based virtual reality techniques, which are why they are called screen sports. However, these platforms cannot support various sports games, especially virtual match games, such as squash, boxing, and so on, because existing screen-based virtual reality sports techniques use real balls and players. This article presents screen-based haptic-augmented reality technologies for a new virtual sports platform. The new platform does not use real balls and players to solve the limitations of previous platforms. Here, various technologies, including human motion tracking, human action recognition, haptic feedback, screen-based augmented-reality systems, and augmented-reality sports content, are unified for the new virtual sports platform. From these haptic-augmented reality technologies, the proposed platform supports sports games, including indoor virtual matches, that existing virtual sports platforms cannot support.
김종성,김홍기,정혁,김기홍,임선희,손욱호,Kim, J.S.,Kim, H.K.,Jeong, H.,Kim, K.H.,Im, S.H.,Son, W.H. 한국전자통신연구원 2005 전자통신동향분석 Vol.20 No.4
생체신호 기반 인터페이스 기술이란 근전도 및 뇌파와 같은 인위적으로 발생 가능한 생체 신호를 이용하여, 노약자나 장애인이 컴퓨터를 이용하는 데 있어서의 인터페이스(Human-Computer Interface)로 사용하거나 휠체어 등의 재활기기 구동 제어를 위한 명령어를 생성하기 위한 기술을 의미한다. 생체신호 기반 인터페이스는 센서를 몸에 부착하여 사용하며 사용자의 의도에 의해 자연스럽게 생성된 생체신호를 이용하기 때문에 가상현실, 착용형 컴퓨터나 지체 장애인용 인터페이스로 활용될 수 있을 것으로 기대된다. 본 논문에서는 이러한 생체신호 기반의 인터페이스에 관한 국내외 기술 동향과 현재 개발중인 HCI 시스템에 대한 개요에 대해 논하고자한다.
권용식(Y. S. Kwon),김종성(J. S. Kim),문형일(H. I. Moon),손미진(M. J. Sohn),천재승(J. S. Cheon) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The electric wedge brake (EWB) is an electro-mechanical brake actuator that shows promise for application in future brake by wire systems. Due to the system properties it has special system that supplies proper pedal feel reactions which means user actuating forces. The pedal feel generally considers critical issues which cause various complaints of car manufacturing company. However, making proper pedal feel is fussy task because of the system complexity. In this study, a Multi-objective robust design approach was applied to the design of the pedal simulator to adapt target pedal feel proposed mass-produced car as well as to improve the durability of system. The multiple regression methods are established to perform an approximated design optimization. Pareto optimal solutions for minimized gap of pedal feel and maximized S/N ratio characteristics present the robust optimal solution.
원전 매설 HDPE 배관의 응력에 대한 해석 변수 영향 고찰
김종성(J.S. Kim),김윤재(Y.J. Kim),이승건(S.G. Lee),박흥배(H.B. Park) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Recently, there has been trend to use HDPE material with buried piping in nuclear power plants. ASME B&PV Code, Code Case N-755, which is technical basis including design requirements for the nuclear safety class 3 buried HDPE piping, presents thickness calculation equation based on thin-walled piping equation, and doesnt consider thickness-directional temperature gradient and nonlinearity of Youngs modulus. HDPE piping is made of thick-walled piping because of low mechanical strength relative to steel, can have high temperature gradients along thickness due to low thermal condictivity, and the Youngs modulus of HDPE may have nonlinearity for strain. In this study, effect of analysis variables such as the thick-wall thickness, the thickness directional thermal gradient, and the nonlinearity of elastic modulus on stresses for the buried HDPE piping was investigated via finite element analysis.