• Journal of Bio-Environment Control
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• v.7 no.1
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• pp.1-8
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• 1998

A Hardware system of hybrid environmental control was developed for using it in the multi-greenhouse. Now, an on/off control system is most utilized in protected cultivation, but a hybrid environmental control system is not yet. This system consists of a hardware to be devided by physical elements and a software for the hardware a personal computer, a hybrid environmental control and a communication Program for modules. The hardware was made of several independent modules with independent CPU. Each module was made to slots. which are very convenient to mount and take off. Also, they are managed easily to repair, add, remove, and change of their function and expansion. The software for a personal computer was a menu driven program written in visual basic within a Windows environment for easy applications by a user. The hybrid environmental control software have operating factors operate continuously with temperature, humidity and others in greenhouse. Communication programs were used both 485 communication method for long distance communication between modules and CRC communication method for making easy to program, and less errors between personal computer and modules.

• The Journal of the Korea Contents Association
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• v.10 no.4
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• pp.133-140
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• 2010

It is said that the highlight in the media covergence and integration within digital environment era is 'Contents'. Due to the advent of new media and various covergence and integration services, the competition between the platforms has become aggressive. As a result, it is predicted that the negotiation power of a 'Content's industry will be strengthened. In reality, the actual environmental changes in the media environment have accompanied elements of industrial crisis rather than opportunity to expand the market. The changes are especially causing sales structure distortion and proceeds deterioration in the Korean film industry. Moreover, telecommunication and broadcasting businesses are making their entrance into the film industry, through the appearance of the media covergence and integration as a backdrop. Thus, the situation that the Korean film industry is facing is closely associated with the development of the digital technology and new media environment. Eventually, weathering the crisis and pioneering the future will be possible through changes in the media environment. The purpose of this study is to show how the media covergence and integration phenomenon is occurring in the film industry. This study will also focus on what new problems are occurring as a result, and seek out the solutions that are available.

• Composites Research
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• v.14 no.1
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• pp.62-64
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• 2001

• 기계와재료
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• v.21 no.4
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• pp.24-29
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• 2010

새로운 소재의 개발과 더불어 이의 특성을 평가하기 위한 여러 방법들도 새롭게 개발, 적용되어 왔다. 그러나 동일한 소재라도 사용 환경에 따라서 그 특성은 다르게 나타나기 때문에 사용 적정성의 평가는 반드시 수행되어야 한다. 특히 소재의 내구성이 한계에 달하는 극한환경에서 사용을 목적으로 하는 경우 더욱 그러하다. 이 분야의 연구는 전통적으로 미국, 일본, 독일 등을 중심으로 개발되어 왔으나 근래 국내의 연구개발도 산, 학, 연 분야에서 활발하게 진행되고 있다. 우리 연구소에서는 당해연도를 시작으로 극한환경 소재 기술개발을 수행하고 있다. 본고에서는 초고온 환경에서 사용되는 탄소-탄소 복합소재의 특성평가를 목적으로 이 분야의 비파괴평가 기술개발 동향을 소개한다.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.183-190
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• 2017

Recently the scale and area of greenhouse cultivation have been enlarged in Korea, and its importance in domestic agriculture is being increased. According to these situation, environment control systems are widely used in greenhouses. Even though development of greenhouse facilities and control devices, cultivation skill using them is in lower level more than european countries and Japan. In this study, we propose intelligent information system based on information-communication technology that supports environment control systems. Proposed system is able to support to maintain optimal environment for plant growth using data from environment control system, and also give useful knowledge for cultivation by active way. Furthermore, it estimates future status of plant growth, and suggest best strategy of environment control for current stage.

• Journal of the Korean Society of Propulsion Engineers
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• v.17 no.2
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• pp.31-38
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• 2013

This research analyzed the acoustic emission signals collected from the pin loading tests and investigated the effect of hygrothermal exposure on the fracture behavior of the pin-jointed carbon fiber/epoxy composites. The composite specimens include: the Base specimen that has not been exposed to any environments, the RT specimen that has been immersed in room temperature water, and the HT specimen that has been immersed in high temperature water. According to the pin loading test, the RT and the HT specimens showed 2.2% and 13% decreases in the bearing strength compared to the Base specimen, respectively. The analysis of the acoustic emission signals showed different fracture acceleration points for three types of the specimens. Furthermore, for the RT and the HT specimens, the event from the matrix crack signals in the composites decreased. This shows the effect of the hygrothermal conditions on the acoustic emission signals. Additionally, upon investigating the fracture behaviors of the pin-jointed composites, the exposing specimens to hygrothermal environments decreases the interfacial characteristics of the composites.

• 한국벤처창업학회:학술대회논문집
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• 2020.11a
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• pp.39-44
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• 2020

본 연구는 농촌융복합산업에 관심이 있는 예비 농촌융복합산업 창업인들의 농촌융복합산업 창업의도 발현에 대한 영향요인들을 실증적으로 분석하였다. 농촌융복합산업 예비창업자들이 농촌융복합산업 창업이라는 의사결정을 하는데 미치는 영향요인을 실증적으로 분석하여 영향관계를 규명하는데 목적이 있다. 특히 농촌융복합산업 창업도 창업의 한 형태로 이해할 수 있는 것이라는 관점에서 논의를 전개하였으며, 이를 위해 창업연구 분야에서 농촌융복합산업 창업의도에 영향을 미치는 요인 분석에 사용되는 연구분석틀을 응용하여 분석을 수행하였다. 잠재적 농촌융복합산업 창업자들인 예비농업인들의 창업 기초 자료를 제공하고 관련 정책에 대한 시사점을 도출하는 데 목적이 있다. 이에 따라 본 연구는 예비 농촌융복합산업 창업자들이 현재의 환경 하에서 농촌융복합산업 창업을 고려할 때 창업의도에 미치는 요인들로서 개인적요인과 외부적요인으로 귀농지역적 요인, 정책적요인을 선정하였다. 이후 선행연구 및 정책적 자료들에 대한 문헌연구를 통해 이론적인 개념을 정립하고 연구모형을 설정하였다. 선택된 연구의 변수들인 내적 개인특성, 외부 환경요인, 정책적요인, 농촌융복합산업 창업의도들 간의 관계를 실증분석하고, 이를 토대로 의미 있는 이론적 및 정책적 시사점들을 제시하고자 한다. 첫째, 농촌융복합산업 창업의도에 영향을 미치는 요인들에 대해 알아볼 것이다. 이를 위해 연구대상인 농촌융복합산업 예비창업자 개인적 요인과 외부적인 지역적요인, 정책요인을 변수로 제시하고자 한다. 둘째, 표본의 일반적 특성과 농촌융복합산업 창업의도와의 상관관계에 대해 분석할 것이다. 연령, 현재 회사에서 맡고 있는 업무분야, 기업규모, 성별, 학력, 농촌융복합산업 유형, 근무경력 등 인구통계적 특성이 개인의 농업·농촌 관심도와 농촌융복합산업 창업의도에 어떤 영향을 미치는지를 집단간 비교분석을 통해 알아볼 것이다.

• Journal of the Korea Concrete Institute
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• v.14 no.5
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• pp.708-717
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• 2002

Durability is a major concern in the design and construction of concrete structures which are located in the sea environments. In particular, the combined action of chlorides, sulfates, and carbonation nay influence greatly the deterioration behavior of concrete structures. The purpose of the present study is to explore the diffusion characteristics of chloride ions in concrete structures under combined deterioration conditions. The present test results indicate that the chloride penetration into concrete structures is more pronounced under combined attacks of chlorides, sulfates and carbonation. The diffusion coefficients and surface chloride contents were found to increase under combined multiple deterioration conditions. The present study provides quantitatively the penetration and diffusion characteristics of chloride ions in concrete structures under various deterioration conditions. The results of present study may be efficiently used for the realistic design of concrete structures under combined deterioration conditions.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.647-650
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• 2008

네트워크 환경이 컨버젼스(convergence)되면서 하나의 단말에서 제공하는 서비스 역시 다양화되고 있다. 개인용 휴대 단말들도 기존에 개별 기능만을 주로 다루던 형태에서 다양한 융복합 서비스를 하나의 단말에서 제공하는 형태로 발전하고 있다. 따라서 본 논문에서는 컨버젼스 네트워크 환경에서 제공되는 여러 서비스를 동시에 지원하는 단말을 "복합단말(All-in-one Mobile Device)"이라 정의한다. 복합단말은 기능, 성능, 네트워크 인터페이스 측면에서 다양한 컨버젼스가 제공되고 있는데, 이 중에서 다양한 네트워크 인터페이스의 제공으로 인터페이스간 교차로 인해 기존에 존재하지 않았던 새로운 형태의 보안 위협인 Cross-service 공격이 등장하고 있다. 기존 모바일 디바이스와는 달리 복합단말에서의 Cross-service 공격은 사용자에게 과금이나 배터리 소모와 같은 치명적인 문제점을 발생시킨다. 본 논문에서는 Cross-service 공격으로부터 복합단말을 보호하기 위한 탐지 메커니즘 및 보안 요구사항을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.563-566
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• 2017

In order to prevent livestock diseases and produce the high quality livestock products in the livestock industry, it is necessary to manage the conditions of the livestock farms in the optimal condition. Therefore, these days the research on livestock growth models that analyze the factors of the air environment, the breeding environment, and the numerical rules of livestock in vivo is being carried out to improve and manage the environment in which livestock are kept. However, conventional models of growth are not sufficient to support the decision-making to control complex environment in pen by analyzing and interpreting air environment and breeding environment in a complex way. In this paper, we propose a method to control the complex environment in pen by using artificial neural network model based on biological information, air environment, breeding environment and production information.