• Asia Pacific Journal of Business Review
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• 제2권2호
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• pp.1-15
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• 2018

The purpose of this paper is to find out the factors responsible for purchase of LED (light-emitting-diodes) bulbs & tubes among Indian consumers and how much they are ready to replace their existing lighting system with LED fittings. A multiple regression model has been employed to investigate the factors affecting the buying decision of LED lamps in place of CFL and incandescent lamps. Eleven motives for adopting LED lamps has been identified viz. price, quality, energy saving, durability, brand, promotion, CSR, & environmental consciousness. In addition the effect of demographic variables like gender, age, household income on the purchasing decision of LED has also been examined. A total 150 respondents were contacted visiting different outlet of electrical shops of Northern Delhi. The study may helpful for the companies to decide their marketing strategies to promote LED Lamps among the consumers with an aim to save energy and save environment.

• International journal of advanced smart convergence
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• 제6권1호
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• pp.82-88
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• 2017

Emergency lights and exit signs are an indispensable part of safety precautions for effective evacuation in case of emergency in public buildings. These emergency sign indicates safe escape routes and emergency doors, using an internationally recognizable sign. However visibility of those signs drops drastically in case of emergency situations like fire smoke, etc. and loss of visibility causes serious problems for safety evacuation. This paper propose a novel emergency light and exit sign built-in with Bluetooth Low Energy (BLE) Beacon to assist the emergency self-guiding evacuation using devices for crisis and emergency management to avoid panic condition inside the buildings. In this approach, the emergency light and exit sign with the BLE beacons deployed in the indoor environments and the smart devices detect their indoor positions, direction to move, and next exit sign position from beacon messages and interact with map server in the Internet / Intranet over the available LTE and/or Wi-Fi network connectivity. The map server generate an optimal emergency exit path according to the nearest emergency exit based on a novel graph generation method for less route computation for each smart device. All emergency exit path data interfaces among three system components, the emergency exit signs, map server, and smart devices, have been defined for modular implementation of our emergency evacuation system. The proposed exit sign experimental system has been deployed and evaluated in real-time building environment thoroughly and gives a good evidence that the modular design of the proposed exit sign system and a novel approach to compute emergency exit path route based on the BLE beacon message, map server, and smart devices is competitive and viable.

• 한국학교보건학회지
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• 제6권2호
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• pp.24-55
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• 1993

School health aims to guide and manage growing students from elementary schools to high schools in order to grow healthily through the formation of healthy life habits, the self-control health management guide and the making of pleasant school health environments. Even though this school health plays an important role in guiding the students who are in the period of growing to have a perfect personality as a democratic people of our country in the school education, there are many lacks, such as they still don't know the word itself, "school health" or recognize its importance. Also it's a real condition to practice items concerned with the health under the condition of unestablished structure. 1. The results of analyzing school health real conditions. Based on treatises concerned with school health and various statistical materials which are announced by concerned people. We divided and analyzed school health into the items concerned with health education, the items with health management, and the items with school health environments, and investigated the level of the present school health and its necessity. As the items concerned with health education, we investigated the necessary range of school health education, the effect of health education on children's daily life, family's health and the interesting contents of school health. And as the items with health management, I investigated children's obesity, dental caries, eyesight, clinics, a health examination, drug abuse, spirit health, providing meals for school children, and school health manpower. And as the items conerned with school health environments, we investigated the recognition of the problem of natural environments, the management of purification district around the school, the problem of environments within the school and classroom lighting. As the results of analyzing these, I realized that the present level of school health is still in unsatisfactory situation and school health is needed necessary. 2. The establishment of school health. In order to set the school health, above all, the management system of School health should be set. I classified and systemized the contents of each item which had been promoted till now according to the function. They are classified as followings Based on classifying school health into (1) health education, (2) health management and (3) health environments, I divided school health education into the health education of health subjects, the health education of concerned subjects and the education of health life. And I divided health management into the health managements for a prevention and a cure. And I divided health environments into the environment around the school and within the school. Each system set like these is not fixed invariably and I should keep the relationship of mutual supplement between health education and health management, between health management and health environments, and between health environments management and health education. When we run these systemetic school health, students' health could be maintained and improved to more proper directions.

• 디지털산업정보학회논문지
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• 제15권4호
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• pp.149-157
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• 2019

In case of reading passport using a smart phone in contrast with a dedicated passport reading system, MRZ(Machine Readable Zone) character recognition can be hard when the character strokes were broken, touched or blurred according to the lighting condition, and the position and size of MRZ character lines were varied due to the camera distance and angle. In this paper, the effective recognition algorithm of the passport MRZ information using a combined neural network recognizer of CNN(Convolutional Neural Network) and ANN( Artificial Neural Network), is proposed under the various sized and skewed passport images. The MRZ line detection using connected component analysis algorithm and the skew correction using perspective transform algorithm are also designed in order to achieve effective character segmentation results. Each of the MRZ field recognition results is verified by using five check digits for deciding whether retrying the recognition process of passport MRZ information or not. After we implement the proposed recognition algorithm of passport MRZ information, the excellent recognition performance of the passport MRZ information was obtained in the experimental results for PC off-line mode and smart phone on-line mode.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.487-492
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• 2009

A large-scaled research project titled "Intelligent Excavating System (IES)" sponsored by Korean government has launched in 2006. An issue of real-time 3D terrain modeling has become a crucial point for successful implementation of IES due to many application limitations of state-of-the-art techniques developed in various high-technology fields. Many feasible technologies such as laser scanning, structured lighting and so on were widely reviewed by professionals and researchers for one year. Various efforts such as literature reviews, interviews, and indoor experiments make us select a structural light technique and stereo vision technique as appropriate techniques for accomplishment of real-time 3D terrain modeling. It, however, revealed that off-the-shelf products of structural light and stereo-vision technique had many technical problems which should be resolved for practical applications in IES. This study introduces diverse methods modifying off-the-shelf package of the structural light method, one of feasible techniques and eventually allowing this technique to be successfully utilized for achieving fundamental research goals. This study also presents many efforts to resolve practical difficulties of this technique considering basic characteristics of excavating operations and particular environment of construction sites. Findings showed in this study would be beneficial for other researchers to conduct new researches for application of vision techniques to construction fields by provision of detail issues about practical application and diverse practical methods as solutions overcoming these issues.

• 한국산학기술학회논문지
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• 제15권9호
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• pp.5434-5439
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• 2014

금속의 표면관리는 공구 현미경이나 표면 조도 측정기를 이용하고 있다. 이러한 방법은 구조적인 문제로 인하여 생산현장에서 금형의 표면 상태 확인을 하기에는 효율성이 떨어진다. 이런 이유로 완성된 금형의 노후화에 따른 마모, 흠집 및 표면 상태를 관리할 수 있는 분석시스템 또는 측정시스템이 필요하다. 본 연구는 금형이나 가공품의 자동분석 및 기준화를 위한 표면상태 분석 소프트웨어를 개발하였다. 소프트웨어는 기본적으로 원, 점, 선 등의 요소들을 측정할 수 있게 개발하였으며, 캡처한 사진을 3차원 이미지로 구현하여 금형에 생긴 홈의 깊이와 단면 프로파일을 추정할 수 있도록 중점을 두었다. 실험분석결과 표면 조도는 93.2%이상의 정확도를 나타냈으며, 조명밝기에 대한 표면 조도의 최대편차는 $3{\mu}m$ 이내로 매우 정밀하였다. 이런 결과로 금형의 측정 및 표면분석을 통한 품질관리의 효율성을 확인 할 수 있었다.

• 한국콘텐츠학회논문지
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• 제6권5호
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• pp.66-75
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• 2006

세계적인 애니메이션산업의 호황에도 불구하고 현재 국내에서는 여러 가지 많은 어려움에 봉착해있다. 2003년 개봉된 원더플데이즈 (Wonderful Days)의 흥행실패 이후 외부투자는 거의 끊어지다시피 했으며 각종 정부지원마저도 줄어들고 있다. 이러한 현실에서 애니메이션 제작자들에게는 기존의 제작시스템을 면밀히 점검하고 개선사항들에 대해서는 과감하게 칼을 들이대는 구조조정이 요구되고 있다. 기획력의 부재 등 과거부터 이어져온 고질적인 문제들과 더불어 제작시스템의 개선을 통한 일정단축과 비용절감도 중요한 문제이기 때문에 본 논문은 현재 업계에서 적용되고 있는 전체 3D 애니메이션 제작과정을 살펴보고, 문제점을 분석하여 애니메이션의 효율적인 제작시스템 여건을 위한 제작관리프로그램의 필요성을 제시하는데 그 목적이 있다.

• 한국정보통신학회논문지
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• 제18권10호
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• pp.2489-2496
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• 2014

기존 수기 작성기반 선박 수리장비 관리 시스템은 빈번한 장비 분실 및 연체로 장비 관리에 많은 문제점들이 있다. 이러한 문제를 해결하고자 바코드 시스템을 도입하였다. 그러나 바코드 훼손에 따른 위조 장비의 대체 문제에 대처할 수 없다. 따라서 고가의 선박 수리장비의 관리를 위해 추가적인 확인 절차가 필요하다. 본 논문에서는 선박 수리장비 관리를 위한 이미지 비교기법을 제안한다. 구체적으로 모바일 디바이스의 특징을 이용한 정규화와 이미지 비교 판단 조건을 제안한다. 실시간 촬영 및 오버랩과 Crop 기능을 가진 모바일 디바이스를 이용하여 이미지를 정규화 하였고, 유사이미지에 대처할 수 있는 이미지 비교 판단 조건 세 가지(사각형의 내각의 합, 각 내각의 크기, 모서리의 좌표점)를 적용하였다. 그 결과 본 논문에서 제시한 방법이 방향, 조명, 크기 등의 변화에도 강건함을 보이며 테스트 결과 95% 이상의 정확도를 보였다.

• 생물환경조절학회지
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• 제14권3호
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• pp.218-231
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• 2005

본고에서는 우주에서 장기간에 걸쳐 임무를 수행하는 인간의 생명지원을 목적으로 CELSS를 이용한 식물생산, 물과 공기의 정화 및 재생, 폐기물 처리 등을 위한 공학적 접근을 검토하였다. 이러한 공학적 접근에는 미소중력 또는 저압과 같은 우주 환경에 적용 가능한 폐쇄형 식물생산 시스템, 물질 순환, 물의 재생, 폐기물의 처리, 미량 유해가스의 제거, 조명, 배양액의 공급 등이 포함된다. 우주에서 재배 가능한 작물의 선택 기준으로 높은 생산성, 식용성, 소화성, 조리성, 자동화 가능성, 짧은 줄기, 높은 증산속도 등이 제기되고 있다. 화성 표면에서의 낮은 압력은 작물 생산용 온실을 설계할 때 주요 장애물에 해당한다. 때문에 저압하에서 식물 재배가 가능한 팽창식 온실의 개발에 관심이 집중되고 있다. 팽창식 온실의 구조, 내부 압력, 자재, 조명 방식, 방사선 차폐 등은 주요 설계 인자에 해당한다. 팽창식 온실 내의 낮은 압력은 구조물의 질량과 가스의 누출속도를 줄일 수 있다. 저압 조건에서는 증산속도가 급격하게 증가하여 식물의 수분요구도가 높게 나타난다. 증산 또는 수경재배시스템으로부터의 증발에 의해서 수분이 대기 중으로 방출될 때 증기압이 증가한다. 저압 조건에 있는 폐쇄계에서는 증기압의 변화가 전체 압력에 커다란 영향을 미친다. 그러므로 저압 조건의 수경재배시스템은 누수로 인하여 기화되는 수분 손실을 줄이기 위해서 고도로 밀폐되어야 한다. 또한 저압으로 유지되는 온실내의 상대습도를 높게 유지할 수 있는 환경제어 기술이 개발되어야 한다. 향후 폐쇄생태계 생명유지 시스템의 핵심 기술은 우주뿐만 아니라 지구상의 사막, 극지방 또는 해저와 같은 열악한 환경 조건에서도 생명 지원을 가능케 할 것이다.

• 전기학회논문지
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• 제67권10호
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• pp.1382-1387
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• 2018

There is a high demand for energy efficiency improvement of factories that make up a large part of national electric energy. Therefore, research on smart FEMS technology for monitoring, analyzing and controlling energy consumption patterns is under way, but there is still a lack of research on detailed element technology for communication and control inside the factory. In this paper, we proposed OFDM VLC system based on MODBUS protocol for communication between gateways, sensors, and devices to implement smart FEMS in indoor factory environment. Assuming a conveyor belt load control, we validated the proposed system by simulating the inverter motor control and checking the performance.