• Korean Journal of Environmental Biology
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• v.17 no.3
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• pp.315-319
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• 1999

Spore attachment of Ulva fasciata on agar and agaroses coating films showed various surfaces properties according to concentrations of agar or agaroses or via methanol. The highest number of spore attachment occurred in Sigma agarose coating film. Spore attachment on Bacto agar and other agaroses coating films showed the 12 ∼ 36 times less than Sigma agarose coated film. Comparison of spore attachment on 2.5% and 5％ Seakem agarose and Bacto agar coating films differed in two concentrations while coating of 2.5% and 5％ with NuSieve and Sigma agaroses did not differed. Spore attachment of coating made of 5％ and 5% via 4% MeOH with Bacto agar and Nusieve agarose only differed. Overall, these results indicated agar and agarose coating films differed in spore attachment. Results of this work will be useful baseline for bioassay of antifouling activity of fouling organisms.

• Journal of Animal Environmental Science
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• v.7 no.3
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• pp.155-164
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• 2001

Environmental factors such as $NH_3,\;H_2S,\;CO_2$, dust, temperature, and humidity in the animal house are a potential health hazard to humans and animals. Until now, most of measurement methods can only provide periodic results with low accuracy. A data acquisition system which can measure continuously and simultaneously $NH_3,\;H_2S,\;CO_2$, temperature, and humidity was developed and installed in two pig houses. Daily changes of environment for the pig-houses were investigated by the data acquisition system. In order to evaluate NH$_3$sensor, gas samples were obtained and NH$_3$concentrations were measured at nine positions; combinations of three positions(inlet, middle, and outlet) and three heights(0 cm, 40 cm, 150 cm). Ammonia concentration of 14.0 ~37.1 ppm for slurry pig-house is higher than that of 8.4~29.7 ppm for scraper pig-house, and there were no statistical differences among the positions. However, the concentration of $NH_3$at 150 cm was higher than thats of 0 cm and 40 cm.

• 한국생활과학회:학술대회논문집
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• 2008.05a
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• pp.179-180
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• 2008

• 보건세계
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• v.58 no.1
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• pp.34-36
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• 2011

아침부터 코가 꽉 막힌다. 건조한 날씨 속에서 건강에 적신호가 켜진 것이다. 목도 컬컬하고, 미열도 있다. 그렇다고 해서 가습기에 의존하지는 말자. 지구 환경을 생각하는 생활속 아이디어를 발휘해보면 되니까 바로 집안의 가습기 역할을 하는 화초 키우기. 화초의 잎은 호흡을 한다. 따라서 공기를 들이마셔 공기 중의 다이옥신 등의 오염물질을 걸러내고, 신선한 공기를 내놓는다. 특히나 집안에 있는 화초는 최고의 인테리어 효과를 가져오기도 한다. 팔방미인 화초로 센스를 놀일 수 있는 방법을 살펴보자.

• Clean Technology
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• v.6 no.2
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• pp.101-106
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• 2000

A new nonvolatile and nonflammable soldering flux was developed. This flux was synthesized with dichloropropane as its solvent instead of VOC solvents such as isopropanol and methanol etc. which had been used in the conventional flux. It was confirmed that the nonflammable and nonvolatile flux(NFV-flux) was better in insulation resistance, workability, and reliability and that it was better in the enviromment and safety of the working place and more economic in comparison with the conventional flux.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.229-230
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• 2022

본 논문에서는 CNN Object Detection과 더불어 3D 카메라 기반 디지털 좌표 인식 기술을 제안한다. 이 기술은 3D Depth Camera인 Intel 사의 Realsense D455를 이용해 대상을 감지하고 분류하며 대상의 위치를 파악한다. 또한 이 기술은 기존의 Depth Camera 내장 거리와는 다르게 좌표를 인식하여 좌표간의 거리까지 계산이 가능하다. 또한 Tensorflow SSD 구조와의 메모리 공유를 통해 시스템의 자원 낭비를 줄이며, 속도를 높이는 멀티쓰레드를 탑재했다. 본 기술을 통해 좌표간의 거리를 계산함으로써 스포츠, 심리, 놀이, 산업 등 다양한 환경에서 활용할 수 있다.

• Korean Institute of Interior Design Journal
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• v.24 no.3
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• pp.205-212
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• 2015

This study starts at the at-risk children(the students in the margins)' needs for the inclusive education environment who increased lately. It is studied in the limited scope, which is about spacially 'playground' and 'Sensory integrative therapy' in terms of the special education therapy. The 6 environmental setting principles are suggested, which is redefined in terms of suitable for applying to the environment design based on the training way and arbitration principle of J. Ayres' Sensory integrative therapy. And then various environment design methods are drawn from above-mentioned 6 principles, they are categorized in 4 elements for environmental setting - sensory element, behavior element, mental element and design expression element. This trial brings daily practice of therapeutic stimulate to sensory integration dysfunction children, and sensory experiential diversity promoting development to general children. Expecially it has some advantage that at-risk children(the students in the margins) feel a sense of belonging as a member of society.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.04a
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• pp.386-392
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• 2008

The purpose of this study is to clarify playground types by characteristics of playground environment in child care facilities, to analyze the needs and estimation of users according to playground types. The subjects of this study were care-givers, who assist outdoor play activities of children and manage safety in playground, to estimate adequateness of playground's environment to children's outdoor plays and to report needs. The data were collected by field measurement survey for clarification playground environments in 21 child care facilities and structured-questionnaire for estimation and needs of 181 care-givers in them. The major results showed the following. 1) The playgrounds were clarified to five type according to number of child and size of playground. The five types include A-type as large-scale facility/small-size playground, B-type as small-scale facility/large-size playground, C-type as small-scale facility/small-size playground, D-type as middle-scale facility/large-size playground, and E-type as large-scale facility/large-size playground. 2) The adequateness of playground environment of D-type were estimate higher than others. C-type were estimated lower than other types in size and outdoor play areas organization of playground. 3) The care-givers in D-type and E-type wanted to install various play equipments, but the care-giver in C-type didn't wanted to install play equipment. 4) The various outdoor play areas were needed in D-type.

• Korean Journal of Human Ecology
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• v.17 no.4
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• pp.661-677
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• 2008

The purpose of this study is to develop the playground environment model for child care center by analyzing user needs of playground environment. To systemize the playground environment design factors and guidelines, we reviewed the previous research, actual measurement and observation were used as the research methodology. And to recognize the needs of users, the survey and picture survey was conducted to the staffs and children. The scope of survey included child care centers in Seoul and Daejeon, ultimately selecting 12 places in Seoul and 13 places in Daejeon. In terms of the survey period, actual measurement was conducted from June of 2006 to February of 2007, survey and picture survey was conducted from August to September of 2006. For analysis, we used SPSS 10.0 to check the frequency and percentage, as well as to perform cluster analysis. The findings of research can be summarized as below: 1. In playground environment, we observed the area of play ground and ground cover, the independence of play area, play equipment, and the composition of play area. The result of observation showed that while playground area varied widely, ground cover, play equipment, and the composition of play area turned out to be identical, regardless of the playground's area. Therefore, in order to classify various playground environments, we categorized them into 5 types, using the number of children and the area of play ground as a category. Type A had large facilities and small playground area. Type B had small sized facilities and large playground area. Type C had medium sized facilities and small playground area. Type D had medium sized facilities but large playground area. Type E had large sized facilities and large playground area. 2. On the other hand, staffs wanted a tunnel, playhouse, comprehensive play equipment, and a maze to be installed as play facilities, and there were requests for adventure play area and carpenter play area. The picture survey to children showed that they wanted equipments that can provide more thrill, adventure and challenge to them than the ones they see now. Therefore, existing child care center play environments must change from the monotonous and identical environments to the ones that can provide diversities, challenges, and adventures. In the contexts of 5 playground types suggested by this research, type B and D, E where the area of playground were larger than the legally required, should include various play areas and install appropriate play equipments and facilities. Type A and C where the area were small, should provide multipurpose play area to attract the various play behaviors of children.

• Journal of Industrial Convergence
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• v.20 no.5
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• pp.39-59
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• 2022

We analyze the perceptions and requirements of early childhood teachers for artificial intelligence(AI) education to develop an AI education program for 5-year-olds. As for the research methodology, we conducted a survey and an in-depth interview to extract the AI educational elements centering on the analysis stage, the first stage of the ADDIE model. The research result is that first, it is necessary to design a curriculum that combines the contents of early childhood education and AI education to be naturally accepted as AI education for 5-year-olds. Second, an evaluation tool for AI education that can showcase the teacher's reflection should be developed systematically. Third, it is necessary to support a play-centered AI education support and environment for early childhood teachers. Lastly, it is essential to establish a system that can be continuously operated in the field of early childhood education in consideration of AI education in the non-curricular curriculum. It is expected that in the future, a play-oriented AI education program for 5-year-olds will be developed to spread awareness of AI education for infants and present an AI education approach for each age and stage of learners.