• 한국축산시설환경학회지
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• 제2권2호
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• pp.103-110
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• 1996

This survey was conducted to investigate the situation of three types of laying hen houses and farmers' awareness of farm automation. Six windowless, three high-rising windowless and four open-sided laying hen houses were surveyed to compare their characteristics, and sixty farmers answered questionnaires. 1. Population density of laying hen was 13.9 birds/m^2$ in open-sided, 28.9 birds/m^2$ in high-rising windowless, and 44.9 birds/m^2$ in windowless laying hen houses. 2. Feeder space was $12{\sim}13.5cm$ in open-sided laying hen houses, but feeder space of windowless and high-rising hen houses was narrower than that of open-sided laying hen houses. 3. Thermal resistance values were $14.6{\sim}18.7\;m^2\;{\circ}C/W$ in wall, #22.0{\sim}23.7\;m^2\;{\circ}C/W$ in roof of windowless and high-rising windowless laying hen houses but the wall of open-sided laying hen houses was only $1.9\;m^2\;{\circ}C/W$. 4. Maximum ventilation capacity was 0.161{\sim}0.326$ cmm/bird in summer. Minimum rate of tunnel Ventilation laying hen houses in winter was $0.013{\sim}0.040$ cmm/bird, but minimum rate of crossflow and high-rising windowless laying hen houses was larger than that of tunnel ventilation houses. 5. One person managed about 8,100 birds in open-sided, and about 23,500 birds in windowless and high-rising windowless laying hen houses. 7. 90.7% of farmers responsed that they want to construct automatized laying hen houses in the future.

• 기술혁신학회지
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• 제13권1호
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• pp.99-123
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• 2010

Chesbrough가 개방형 혁신이 기업성과에 미치는 영향을 규명한 이래 개방형 혁신의 다양한 성과와 내용을 다루는 연구들이 활성화되고 있다. 아울러, Hippel은 User Innovation 연구를 통해서 의료 장비와 산업자전거 등과 같은 분야에서는 사용자 혁신이 신제품 혁신으로 연결되어 나타나고 있는 것을 보여 주었다. 후자의 경우는 사용자 기반 개방형 혁신의 한 유형으로 볼 수 있다. 그런데 기업의 개방형 혁신의 정도와 내용을 규명하는 방법은 개별 사례연구 혹은 기업에 대한 설문조사를 통한 직접적이고 상당히 질적인 조사 이외에 활성화된 조사 모델이 개발되어 있지 않다. 본 연구는 기술경영 분석 연구에서 그리고 기업의 경영 컨설팅과 신성장 전략에서 각광을 받고 있는 개방형 혁신 연구 방법 모델에 특허분석을 적용하고자 한다. Chesbrough가 자신의 연구에서 일회적으로 밝힌 바 있는 특허를 통한 기업의 개방형 혁신 분석방법을 보다 체계적인 분석모델의 형태로 제안한다. 아울러, 특허기반 개방형 혁신 분석 모델을 대경지역의 IT의료 및 연료전지 분야에 적용하고, 국내외 자동차 및 모바일 대표 대기업인 삼성 모바일 부문과 노키아, 현대자동차와 도요타에 적용함으로써 특허기반 개방형 혁신 분석 모델의 타당성을 검증한다.

• 제어로봇시스템학회논문지
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• 제19권2호
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• pp.171-176
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• 2013

X-ray cross-sectional image-based inspection technique is one of the most useful methods to inspect the brazing joints of heat exchanger. Through X-ray cross-sectional image acquisition, image processing, and defect inspection, the defects of brazing joints can be detected. This paper presents a method to judge the type of detected defects automatically, and to display them three-dimensionally. The defect type is classified as unconnected defect, void, and so on, based on location, size, and shape information of defect. Three-dimensional display which is realized using OpenGL (Open Graphics Library) will be helpful to understand the overall situation including location, size, shape of the defects in a test object.

• 한국해양공학회지
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• 제8권1호
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• pp.96-104
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• 1994

The use of advanced composite materials has grown in recent years in aerospace and other structures. Out of various kinds of repairing methods the one selecteh for this study is an idealized case which simulates a situation where a damaged laminate has been repaired by drilling a hole and therefter plugging the hole with reinforcement. Two typesof reinforcement are investigated ;adhesively bonged plug reinforcement or snug-fit unbonded plug in the hole. For each case of reinforcement, four different sizes of hole diameter and three types of reinforcing material(steel, aluminum, plexiglass) are employed for investigation. The experiment are mainloy forced on the evaluation of ultimate strength of laminate with reinforced hole in comparison to its counterpart with the open hole.

• Journal of Biosystems Engineering
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• 제18권2호
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• pp.110-121
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• 1993

Pepper has been the second important income source of Korean farmer. Provided the agricultural market in Korea is opened, pepper of which price is more than three times of the world market price can not survive with current cultivation practice. Pepper harvesters have been developed in some countries but, they are not feasible in Korea due to difference of varieties, cultivation practice and climate between Korea and other countries. This is a fundamental study to develop a pepper harvester suitable to the current situation in Korea. Physical properties of a pepper plant and its fruit were investigated. Also, a pair of open helices was selected as a pepper removing mechanism and tested to determine the best operating conditions. This study revealed that a pepper harvester with more than 90% of pepper recovery is attainable. Best rotating speed of open helices with 30cm diameter and conveying velocity of pepper main stem were determined to be 180 rpm and 0.1 m/s respectively.

• 한국지능시스템학회논문지
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• 제20권6호
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• pp.837-842
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• 2010

본 논문에서는 양자암호 시스템의 설계과정에서 필연적으로 사용되는 의사난수들의 비트열들이 다수개 존재하는 현상과 이를 상호 공개된 채널에서 부분정보를 공유해야 하는 상황은 비트열들의 쌍을 노출시킨다. 본고에서는 이러한 의사난수 열의 기본 테스트 과정과 이를 벗어나는 이진 병합 비트열의 난수성에 대하여 살펴본다.

• 한국농촌건축학회논문집
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• 제2권3호
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• pp.77-84
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• 2000

Kurye-gun, which Hwaeomsa temple is located, has huge scale's geographical characteristics, such as mountains, rivers and open fields. This is really blessing area because of Som-jin river at the bottom of Ghiri mountain and open fields, which this situation is very difficult. The location of Hwaeomsa temple is an end of The Baek-Doo Mountains and very important spot(where influences to its geometric converge) of the theory of feng-shui. On exposure logic of the Korean traditional theory of feng-shui, the organization in Ga-Ram of Hwaeomsa temple is inconsistent with representative theory and analyzing system. So, this is one of successful examples with the theory of feng-shui because exhalation from the earth and water was organized well with accuracy.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.32-33
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• 2021

When materials are to be transported vertically at the construction site, if the space is small, there is often a precarious situation in which materials are transported outside the scaffold or through the space secured by removing the safety footrest. In addition, if the safety foothold is removed, the reinstallation may not occur due to carelessness of a worker. To solve the problem of this particular case, we have created a safety foothold that is unnecessary to dismantle and can be opened.

• 한국IT서비스학회지
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• 제23권2호
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• pp.83-97
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• 2024

This study was conducted to examine the effect of institutional mechanisms on customers' trust and continuous purchase intention in open market platforms, The research frame was expanded by setting institutional situations into positive and negative areas in order to examine the relationship between institutional mechanisms and trust in multiple dimensions. The results of this study confirmed that the feedback system, dispute resolution, and intermediary trust factors affect trust in positive areas, and dispute resolution, information security, and intermediary trust affect buyer trust in negative areas. For the relationship between trust and repurchase intention, it was confirmed that if the institutional situation is positive, trust leads to repurchase intention, and in negative areas, trust does not lead to repurchase intention. The results of this study show that institutional mechanisms are a key factor in building trust in online platforms according to institutional circumstances and play a role in offsetting trust in platforms in negative areas.

• International Journal of Internet, Broadcasting and Communication
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• 제16권3호
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• pp.363-369
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• 2024

In this paper, we develope a LOB(Limit Order Book) analyzing tool for an automated trading system, which features real-time and offline analysis of LOB data in conjunction with execution data. The 10-tier LOB data analyzer developed in this paper, which contains ask/bid prices and the execution data, receivs transaction requests in real-time from the Kiwoom Open API+ server. In the OnReceiveTrData event, the transaction data from the server is received and processed. The real-time data, triggered by the transaction, is received and processed in the OnReceiveRealData event. These two types of data are stored in a database and replayed in the same way as if it were a real-time situation in simulation mode. The LOB data are selectively read and analyzed in a necessary time points. The tool provides various features such as bar chart analysis and pattern analysis of the total shares on the bid side and ask side, which are used to develop a tool to accurately determine the timing of stock trading.