• International Journal of Internet, Broadcasting and Communication
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• 제16권2호
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• pp.59-67
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• 2024

Current straw mushroom farming in countries with large rice growing areas has great development potential, and was once considered a way to generate additional income and reduce poverty in rural areas. However, currently most people still grow mushrooms using traditional processes, leading to low productivity and unguaranteed output quality. Currently, due to climate change and unusual weather changes, people tend to switch to growing straw mushrooms indoors. In the process of growing straw mushrooms indoors, the design of an automatic control and monitoring system is very important to ensure the growing process is carried out effectively and achieves high yields. In this paper, we propose a system that can automatically control and monitor the humidity and temperature of the indoor straw mushroom growing process and other parameters that can be monitored through a network system using Internet of Things. The control algorithm automatically adjusts the grow house equipment based on feedback from sensors to maintain an optimal environment for growing straw mushrooms. Experimental results show that the straw mushroom growing system with automatically controlled and monitored environmental parameters helps improve efficiency, reduce costs and increase the sustainability of the current straw mushroom growing industry.

• 한국보육지원학회지
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• 제11권5호
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• pp.91-111
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• 2015

본 연구에서는 유아가 오감을 이용한 벼 관찰활동을 통해 유아의 과학과정기술이 어떻게 변화하는지 살펴보고자 실시되었다. 연구참여자는 경기도 오산시에 소재한 Y어린이집에 재원중인 만3세 유아 10명이었다. 유아의 과학과정기술의 변화를 살펴보기 위하여 Spradley(1980)의 참여관찰 분석과정을 최정열(2000)이 수정 보완한 분석과정을 사용하였다. 분석자료에는 유아 인터뷰 자료, 유아관찰일지, 교사 관찰기록 등이 사용되었다. 연구결과 오감을 이용한 벼 관찰활동은 유아의 과학과정기술에 긍정적인 효과가 있는 것으로 나타났다. 유아는 초기에 비해 후기로 갈수록 벼에 대해 예측하기, 관찰하기, 분류하기, 비교하기, 측정하기 능력이 향상되었다. 본 연구결과는 유아의 과학적 사고 신장을 위한 교수방법의 기초자료로 활용될 수 있을 것이다.

• 대한한방소아과학회지
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• 제13권1호
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• pp.17-62
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• 1999

Recently lots of books on the process of growing have been published on adolescence and their parents hope to grow tall but yet lacked the correct knowledge. Before helping the growth of body, the best way is to do away with the check factors of the human body. Therefore oriental and occidental medicine study on the inhibition of growth and the result of case study about life therapy, kinesiatrics, including medical therapy are as follows: The habits that help the process of growing are deep sleep, balanced diets, daily physical exercise, good posture. It is essential for people to relieve stress. The physical exercises that promote the process of growing are as follows: to stretch out, daily suitable exercise which stimulates the metabolism of human body to increase levels of growth hormone and excite growth plate, to hasten the process of growing, Oriental medicine causes on the inhibition of growth show many factors: kidney trouble is the inhibited cause, spleen ailment is the acquired ground. The lack of essence of the dual principal of the negative and the positive makes people the inhibition of growth. All these things including fire and dryness have close relations.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1997년도 춘계학술대회논문집
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• pp.148-152
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• 1997

A numerical method is presented to predict and analyze the shape and the temperature history of a growing billet produced form the "spray forming" which is a fairly new near net-shape manufacturing process. It is important to understand the mechanism of billet growing and the cooling history of the spray deposited body, because one can obtain a billet with the desired final shape without secondary operations by accurate control of the billet shape and, moreover, growing velocity together with the cooling rate define the microstructure of the final formed product. In the present study, a theoretical model is first established to predict the shape of the billet and next the transient axisymmetric heat conduction problem with growing domain is solved using the so called "front tracking finite element technique".ent technique".uot;.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2002년도 학술대회 논문집
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• pp.374-377
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• 2002

Magnetic field is necessary to control the convection of melted silicon and to improve the quality of the wafer in the 12inch silicon wafer growing process. Nowadays, superconducting magnet is used in this process. We fabricated and tested a saddle shaped superconducting magnet for 8inch silicon wafer growing system. And the protection circuits for HTS current lead and superconducting coil are designed and manufactured. In this paper, their manufacturing process and test results are introduced.

• Journal of the Korean Wood Science and Technology
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• 제47권3호
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• pp.324-335
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• 2019

Timber from plantation forests has inferior physical and mechanical properties compared to timber from natural forest because it is mostly from fast-growing tree species that are cut at a young age. Filling cell voids with methyl methacrylate (MMA) can improve the wood properties. The purpose of this study was to determine the physical and mechanical properties of MMA-impregnated wood from three fast-growing wood species, namely jabon (Anthocephalus cadamba (Roxb.) Miq.), mangium (Acacia mangium Willd) and pine (Pinus merkusii Jungh. & de Vriese). Wood samples were either immersed in MMA monomer or impregnated with it and then heated to induce the polymerization process. Jabon, which was the lowest density wood, had the highest polymer loading, followed by pine and mangium. The physical and mechanical properties of samples were affected by wood species and the presence of MMA, with higher-density wood having better properties than wood with a lower density. Physical and mechanical properties of MMA wood were enhanced compared to untreated wood. Furthermore, the impregnation process was better than immersion process resulting the physical and mechanical properties. Based on MOR values, the MMA woods were one strength class higher compared to untreated wood with regard to Strength Classification of Indonesian Wood.

• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 1997년도 제11회 하계학술발표회 논문집
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• pp.124-159
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• 1997

This paper examines a significant example of accumulation of technology in post war Japan - the development process of the videocasstte recorder (VCR) for home use, and the dynamic evolution process of the mass market. The purpose of analyzing the Japanese home VCR industry is to clarify how and why only the Japanese makers had succeeded in developing home VCR and dominated. the global mass market and to make clear the dynamic process of industrial evolution. This study found out the following facts; 1) Japanese inter-firm interactions in the VCR have been carried out by the structure of "the competition and cooperation among the engaged players" form the initial stage, to growing, and maturing stage. 2) The process of competition and cooperation produced the revolutionary innovation through a continuous systematic development process in the R&D phase. 3) The process of competition and cooperation accelerated the speed of technological progress and the rapid growth of the industry in the growing and maturing stage.

• 대한기계학회논문집A
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• 제21권6호
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• pp.961-970
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• 1997

A numerical method is presented to predict and analyze the shape of a growing billet produced from the "spray forming process" which is a fairly new near-net shape manufacturing process. It is important to understand the mechanism of billet growing because one can obtain a billet with the desired final shape without secondary operations by accurate control of the billet shape, and it can also serve as a base for heat transfer and deformation analysis. The shape of a growing billet is determined by the flow rate of the alloy melt, the mode of nozzle scanning which is due to cam profile, the initial positio of the spray nozzle, scanning angle, and the withdrawal speed of the substrate. In the present study, a theoretical model is first established to predict the shape of the billet and next the effects of the most dominent processing conditions, such as withdrawal speed of the substrate and the cam profile, on the shape of the growing billet are studied. Process conditions are obtained to produce a billet with uniform diameter and flat top surface, and an ASP30 high speed steel billet is manufactured using the same process conditions established from the simulation.imulation.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(3)
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• pp.59-62
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• 2002

Watershed Segmentation with Multiple Merging Conditions in Region Growing Process The watershed segmentation method holds the merits of edge-based and region-based methods together, but still shows some problems such as over segmentation and merging fault. We propose an algorithm which overcomes the problems of the watershed method and shows efficient performance for .general images, not for specific ones. The algorithm segments or merges regions by thresholding the depths of the catchment basins, the similarities and the sizes of the regions. The experimental results shows the reduction of the number of the segmented regions that are suitable to human visual system and consciousness.

• 한국전기전자재료학회논문지
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• 제13권5호
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• pp.420-425
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• 2000

Crosslinked polyethlyene/silane crosslinked polyethylene(XLPE/SXLPE) blends were prepared by a twin screw extruder and their water tree growing electrical breakdown and crossinking characteristics were investigated. The water tree characteristics of XLPE were improved by the addition of SXLPE when samples were crosslinked only by the thermorolysis of DCP (dicumyl peroxide). However steam curing process was not good for water tree characteristics. It was also found that the rate of water tree growing of XLPE/SXLPE blend increased when the content of SXLPE was 50%. AC breadown strength slightly increaed by the addition of SXLPE to XLPE when samples were crosslinked only by the thermorolysis of DCP. It was also found that the degree of crosslinking of XLPE/SXLPE blends were higher than that of XLPE in the case of the content without steam crosslinking process.