• Proceedings of the SOHE Conference
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• 2002.10a
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• pp.84-84
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• 2002

• Proceedings of the Korean Institute of Interior Design Conference
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• 2005.05a
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• pp.191-195
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• 2005

This study examines how the students evaluate the color of classrooms in university after remodeling. This is a elementary study, which suggests a direction of study on a criterion of color design in classroom remodeling. The study was progressed through visiting classrooms and POE(post occupancy evaluation). The results indicate that most students satisfied with color environment, and the project of remodeling has increased the level of satisfaction in comparison with before. The level of satisfaction with the color of the architectural elements was high. The level was affected by wall color, floor color and color combination with elements' color. The overall satisfaction with classroom color was correlated with all architectural elements' color. The result shows that the positive effect and insufficiency of color design in remodeling. Also it shows that the color combination is one of important factors of satisfaction of color environment.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.331-331
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• 2022

수자원에서의 증발산량은 물의 손실에 해당하고 이는 국가의 수자원 계획 및 개발 등에 기본자료로 이용, 물 순환 과정의 규명, 물 수지 분석, 작물의 소비수량 산정 등 여러 분야에 활용되고 있다. 국내외적으로 이러한 증발산량을 측정하기 위해서 큰 노력을 수행하고 있으며, 측정기기의 고도화 발전으로 인해 에디공분산 방법을 활용한 증발산량 조사가 주목을 받고 있다. 국내에서도 수자원의 조사·계획 및 관리에 관한 법률 제9조(수문조사의 실시)에 따라 측정범위가 확대되고 있음에도 적절한 관측소 설치에 관한 연구가 부족한 실정이다. 본 연구에서는 적절한 증발산량 관측망을 설계하는 절차에 관해 연구를 진행하였으며, 기기적 측면과 환경적 측면으로 나누어 분석을 시행하였다. 우선 기기적 측면에서는 에디공분산 방법의 가정사항에 적합한 위치를 선정해야 하며 이는 충분한 풍속 및 난류 발생에 용이한 지점, 관측소가 설치 가능한 위치, 관측소 유지관리를 위한 접근성 및 안정성, 원거리 자료취득을 위한 통신망 등이 고려되어야 한다. 환경적 측면에서는 증발과 증산으로 나누어 고려할 수 있는데 증발은 지면의 특성을 고려한 대상 유역의 경사, 지형, 토성, 토양수분을 분류하였으며, 증산은 대상 유역의 식생, 피복, LAI(leaf area index)를 고려하였다. 결과적으로 관측망 선정을 위하여 기기적 측면, 환경적 측면을 고려하여 분석인자를 산정하였고 증발산량 관측소의 설치지점 선정기준을 마련하였으며 관측망 설계에 대한 정량적인 평가를 위한 기준을 제시하였다.

• Korean Journal of Hazardous Materials
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• v.6 no.2
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• pp.39-46
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• 2018

최근 전자제품 생산업체에서 EPS를 직접생산하게 되면서 EPS 공정이 증가하고 있다. EPS에는 펜탄이 포함되어 있으며, 펜탄은 하이브리드 혼합물로 구분할 수 있어 높은 화재폭발의 위험성을 가지고 있다. 각 공정별 펜탄의 누출률은 발포기, 사일로실, 저장실 순이나 발포기의 경우 일반적으로 밀폐되어 있으므로 사일로 실이 가장 화재폭발 위험성이 높다고 판단하였다. 사일로실의 누출률 중 70%는 사일로 상단을 통해 누출되며, 사일로 상단을 통해 누출되는 펜탄의 거동을 분석하여 사일로실 위험성 완화대책을 수립하였다. 1. 폭발위험구역 2종으로 관리, 2. 사일로상단 50cm이내 환기설비 설치 또는 Push-Pull 구조의 환기설비설치, 3. 사일로 하단 1.4m이내에 가스감지기 설치, 4. 60%이상의 습도유지

• Clean Technology
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• v.28 no.3
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• pp.203-209
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• 2022

An environmental evaluation was conducted by employing LCA methodology for a mechanical seal manufacturing process that uses recycled silicon recovered from end-of-cycle PV modules. The recycled silicon was purified and reacted with carbon to synthesize β-SiC particles. Then the particles underwent compression molding, calcination and heat treatment to produce a product. Field data were collected and the potential environmental impacts of each stage were calculated using the LCI DB of the Ministry of Environment. The assessment was based on 6 categories, which were abiotic resource depletion, acidification, eutrophication, global warming, ozone depletion and photochemical oxidant creation. The environmental impacts by category were 45 kg CO₂ for global warming and 2.23 kg C₂H₄ for photochemical oxide creation, and the overall environmental impact by photochemical oxide creation, resource depletion and global warming had a high contribution of 98.7% based on weighted analysis. The wet process of fine grinding and mixing the raw silicon and carbon, and SiC granulation were major factors that caused the environmental impacts. These impacts need to be reduced by converting to a dry process and using a system to recover and reuse the solvent emitted to the atmosphere. It was analyzed that the environmental impacts of resource depletion and global warming decreased by 53.9% and 60.7%, respectively, by recycling silicon from end-of-cycle PV modules. Weighted analysis showed that the overall environmental impact decreased by 27%, and the LCA analysis confirmed that recycling waste modules could be a major means of resource saving and realizing carbon neutrality.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2002.11a
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• pp.103-107
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• 2002

Children in elementary school spend most of their time in their rooms in the housing environment. Children need to be provided with a new children's room environment that fits to their growth and development. Thus, the purpose of this research is to find out environmental characteristics of elementary school children's room. The samples are 633 children in their fourth or higher year grades. The results were analyzed using frequency, percentage, 1-test and F-test. For the research, used also were a developed measurement instrument in this study for environmental characteristics of children's room. The characteristics of children's room environment were categorized into ten items; convenience accessibility, order, ability to express, originality, safety, comfortability, privacy, territoriality, and social interaction. Children's rooms are designed to provide convenience and accessibility to children, but do not provide the creativity in them.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.117-118
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• 2002

본 연구에서는 지하수로부터 방출된 실내라돈오염을 해석하기 위한 수학적 모델에서 모델인자들의 불확실성을 고려하고 인체축적량을 정량적으로 해석하는 PBPK모델을 사용하여 호흡을 통한 라돈의 인체축적량을 보다 현실적으로 평가하려고 한다. 우선, 전에 사용한 3 구역모델을 샤워실과 화장실을 구분하는 경계가 없다는 국내실정을 감안하여 보다 현실적으로 개량한 2-구역 모델을 개발하였다. (중략)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.181-185
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• 2016

In this paper we propose a VR-based Sailor Training Platform Authoring Tool which efficiently trains sailors in immersive ways. Proposed authoring tool consists of virtual environment reconstruction that imports real ship indoor environment into virtual environment and script editing which is able to implement various scenarios in emergency based on just drag-and-drop interface. The aim of importing real ship environment and supporting various VR devices is to enhance immersiveness and training so that trainees can deal with serious emergency events. Also the usefulness of the interface enables to reduce the cost of making training materials. Throughout scenario editing interface, the proposed authoring tool supports the editing of multi-user scenario and setting individual task for the evaluation.

• Journal of the Korean Society of Radiology
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• v.11 no.7
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• pp.605-610
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• 2017

Unlike adults, cognitive ability and communication are not accurate in pediatric patients. Therefore movement due to psychological anxiety in X-ray photography is one of the factors that increase repeated irradiation. In order to minimize the rejection of X-ray and to improve the satisfaction of medical service, it is necessary to improve the environment of the radiological room to help psychological stability and to find a positive measure for reduction of radiation dose, including unnecessary. The subjects of this study were 186 pediatric patients from May to July, 2017, who were from 6 months to 36 months, The study group was set up a radiological room without auditory and visual environment changes is A group, except for changes in visual environment, the room where only auditory environmental changes were applied was group B, the auditory environment changes were excluded, and the room where only the visual environment change was applied was divided into group C, the auditory and visual environment changes were applied to the D. In group A, 10 retrospectives were obtained, 7 in group B, 5 in group C, and 2 in group D. Especially in group A and group D, statistically significant at p <0.053 In conclusion, hearing and visual environment changes affected the psychological stability of pediatric patient, and the repeated irradiation was reduced, thus improving the quality of medical services.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.457-467
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• 2020

Increasing environmental concerns have prompted countries around the world to tighten regulations on greenhouse gases and fuel efficiency. Research is being done using advanced driver assistance systems to improve fuel economy and for the convenience of drivers. Research on systems such as adaptive cruise control (ACC), LKAS, and AEB is active. The purpose of ACC is to control the longitudinal speed and distance of the vehicle and minimize the driver's load, which is considered useful for accident prevention. From this point of view, research has used a mathematical method of safety evaluation as a function of distances and scenarios while considering domestic road environments. A vehicle is tested with a simulation in a proposed scenario. The purpose of the analysis is to verify the functional safety of ACC by comparing the theoretical calculations using theoretical equations, the relative distances in the simulation, and an actual vehicle test. These methods are expected to enable many companies to use scenarios, formulas, and simulations as safety verification methods in the development of ACC.