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전기자동차 화재에 따른 지하주차장 내화설계 개선 필요성 검토
김해나 ( Kim Hae-na ),박준서 ( Park Jun-seo ),신종현 ( Shin Joung-hyeon ),홍상훈 ( Hong Sang-hun ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.2
Electric vehicle fires in underground parking lots are very dangerous, but it is judged that the current related laws and regulations do not change, which will cause problems. As a result of the analysis for the purpose of providing an electric vehicle in an underground parking lot, fire-resistance coating is essential as it can cause an explosion in the building members made of high-strength concrete when an electric vehicle fire occurs in an underground parking lot. Since a fire occurs, it is necessary to prevent electric vehicles from parking adjacent to each other.
피부 광학 기반의 새로운 생체 인증 기술을 위한 1차원 MSP 모듈 Prototype 개발
김해나(Hae-Na Kim),홍혁기(Hyuck-Ki Hong),최연식(Yeon-Shik Choi),조영창(Young-Chang Jo),김동현(Dong-Hyun Kim) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11
This paper investigates the possibility of MSP(Multi-spectral Skin Photometrics) as a novel biometric technology to facilitate automatic identification of individuals. MSP using transmission and diffuse reflection difference with variable wavelength provides information about both the surface and subsurface characteristics of the skin tissue. It is found in this paper that 8 people have their unique patterns each other under the same wavelength. Personal difference of skin tissue components concentration and anatomical characteristics measured by multi spectral light offers possibility of MSP as more enhanced biometric technology.
논 농업용수의 외부효과 구분과 비용산정에 따른 경제성 분석
김해도,허승오,조진훈,나민철,Kim, Hae-Do,Hur, Seung-Oh,Jo, Jin-Hun,Na, Min-Chul 한국관개배수위원회 2010 한국관개배수논문집 Vol.17 No.2
The subject of externality of agricultural water supply has been discussed in the OECD AC ( Organization for Economic Cooperation and Development Agriculture Committee) while argued between monsoon Asian developing countries and the agricultural product export nations (Australia, EU, etc). It argued that a 'positive' approach to multifunctionality views agriculture as an economic activity with multiple, interconnected outputs or effects, and a 'normative' approach interprets multifunctionality in terms of the multiple roles assigned to agriculture. and the agricultural product export nations insisted 'negative' approach to externality of agricultural water supply like causing water pollution. So, in this study, define the externalities (positive, negative and economic, environmental) in terms of the agricultural water supply and calculate benefit and cost each the externalities by cost estimation. As results, BC is calculated to 1.28 which means that it is more economical to agricultural water supply and shows that although the negative exernalities comes out while supply the agricultural water, it still more valuable to supply the agricultural water.
굴 패각 분말과 계란 껍데기 분말을 잔골재로 치환한 모르타르의 역학적 성능
김해나 ( Kim Hae-na ),박준서 ( Park Jun-seo ),신종현 ( Shin Joung-hyeon ),홍상훈 ( Hong Sang-hun ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.2
The purpose of this study was to provide basic data for applying oyster shells and egg shells as fireproof cladding materials by substituting fine aggregates for oyster shell powder and egg shell powder, and comparing strength and fire resistance performance. The reason for the high strength was thought to be that the oyster shell had higher strength than the egg shell itself, and both ESP and OSP were measured at a backside temperature of less than 500℃, so it was judged that it could be used as a fireproof coating for steel structures.
가상 전시시스템에서 상품의 관심도 평가를 위한 영상 분석 기법
김해나 ( Hae-na Kim ),박소정 ( So-jeong Park ),박은비 ( Eun-bi Park ),김호준 ( Ho-joon Kim ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2
본 연구에서는 가상전시 시스템에서 제품의 시각적 디자인에 대한 고객의 관심도를 자동으로 평가하기 위한 영상분석 기법을 제시한다. 전시공간의 동영상으로부터 모션인식, 목표물 감지 및 추적기법을 통하여 기본 특징을 추출하고 이로부터 대상자의 행동패턴을 인식한다. 정의된 각 행동패턴에 따라 상품의 관심도와의 관계를 반영하는 가중치 파라미터를 정의하였으며 이에 대한 학습알고리즘을 제안하였다. 실험으로서 4종류, 종 24개 제품에 대하여 제안된 방법을 적용한 결과를, 직접조사를 통한 실제 관심도 자료와 비교하여 분석함으로써 제안된 기법의 유용성을 평가하였다.
굴 패각을 혼입한 모르타르의 접합방식 및 설치 형태에 따른 이면온도 분석
김해나 ( Kim Hae-na ),홍상훈 ( Hong Sang-hun ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
The purpose of this study is to manufacture mortars incorporating oyster shells and install them in the form of shaped, shaped butt joints, and flat boards to see what difference there is in the back temperature depending on the joint method and the type of installation. Based on the fact that similar backside temperatures were measured regardless of the presence or absence of a joint It is judged that the joint will not affect the backside temperature if it is constructed closely, In the case of ㄱ shaped, it is believed that the backside temperature higher than the backside temperature of the flat board was measured because heat accumulates on the backside during heating.
김해나 ( Kim Hae-na ),홍상훈 ( Hong Sang-hun ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
The thermal conductivity of the insulation material has a great influence on the heat transmission coefficient, which is currently used for energy evaluation of buildings. The thermal conductivity of insulation changes with changes in the environment, such as humidity and ultraviolet rays, and can be expected to with the passage of time. But there is a lack of data on this, so this study measured the thermal conductivity of organic insulation according to environmental conditions and time, As a result, in the case of XPS, the thermal conductivity value increased over time, which is estimated to be due to the decrease in insulation performance as the foaming gas escapes to the outside, and in the case of PIR class2 No.2 and PIR noncombustible, the increased thermal conductivity value is similar, but in the case of PIR class2 No.2, a relatively moderate increase can be seen, and in the case of PIR noncombustible, a large increase is seen at the beginning, which is judged to be due to the decrease in insulation performance as the internal foaming gas is substituted with air from the outside.
윤하중을 받는 강바닥판 교면포장의 변형특성에 대한 수치해석적 연구
김해나래,옥창권,김문영,Kim, Hae-Na-Rae,Ock, Chang-Kwon,Kim, Moon-Young 한국전산구조공학회 2011 한국전산구조공학회논문집 Vol.24 No.4
Longitudinal cracks due to traffic truck loadings that are caused by local deformations of steel orthotropic bridge decks are sometimes observed in the wearing surface. So, underlying causes of the longitudinal pavement crack induced by structural behaviors of steel decks are investigated in this study. For this purpose, The rational finite element model of the steel deck and the pavement having the box girder is developed and a parametric study is performed by varying thickness or elastic modulus ratios of both the steel deck plate and the pavement. As a result, a large tensile strain above the webs of the u-rib and the box girder, which becomes the main cause of the cracks of the pavement, is detected from variation of the normal strain component of the wearing surface in the transverse direction. 강바닥판 교량의 교면포장은 차량의 윤하중을 상판에 고르게 분포시켜 교량 상판을 보호하는 역할을 한다. 하지만 교량의 장대화가 가속화됨에 따라 포장체와 강바닥판의 두께가 얇아지고 이 때문에 교면포장의 횡방향 균열이 빈번하게 발생한다. 본 연구에서는 강바닥판 교면포장의 파손원인 규명과 저감 방안을 모색하기 위해 윤하중을 받는 강박스형 거더를 가진 강바닥판의 유한요소해석을 수행하였다. 다양한 구조적 매개변수 변화에 따른 교면포장 상면 변형도를 조사한 결과 해석결과에서 공통적으로 웹 상단에서 큰 인장변형이 발생하였고, 이것이 교면포장의 구조적인 파손의 주요 원인이 되는 것을 알 수 있다.
김해나 ( Kim Hae-na ),박준서 ( Park Jun-seo ),신종현 ( Shin Joung-hyeon ),홍상훈 ( Hong Sang-hun ),정의인 ( Jung Ui-in ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.2
Insulation material absorption rate is closely related to thermal conductivity. In Korea, there is no study on the change of insulation material in a long-term continuous exposure environment. In this study, basic data on the long-term durability of insulation materials were obtained by measuring the absorption rate of insulation materials over time. For the purpose of providing, as a result of the measurement, PIR class2 No.2 and PIR noncombustible show similar absorption rate trends, which is thought to be due to the fact that both are made of rigid urethane foam, and flame retardant EPS has the highest absorption rate except for PF. This is thought to be because there is a space for absorption between the beads and the beads. In the case of XPS, it is thought that the reason for showing the lowest absorption rate is that because it is produced by extrusion, it has a high density and thus has less space for moisture to penetrate.
청소년 비만관리를 위한 모바일 서비스 개발 및 사용자 평가방법 설계
나승민(Seungmin Na),박인화(In-Hwa Park),김해나(Hae-Na Kim) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.12
최근 국내 청소년의 비만율이 급증하면서 사회적인 문제로 대두되고 있으며 예방과 치료에 대한 필요성이 강조되고 있다. 비만 청소년은 같은 또래보다 자아 존중감이 떨어지고, 우울감 및 불안감 등과 같은 정서적 문제를 일으킨다. 더불어 성인 비만으로 이어질 가능성이 높아 각종 성인병을 유발할 수 있다. 본 연구에서는 위와 같은 문제를 해결하고자 스마트 디바이스를 이용한 청소년 비만관리 서비스를 개발하였다. 또한 서비스의 사용자 평가항목을 정의하고, 데이터를 분석하여 청소년의 비만 문제해결에 어떠한 영향을 줄 것인지 알아보고자 한다. Obesity of youth have been increasing in number recently so it has emerged as a social issue. It is emphasized a need for the prevention and treatment. Youth with obesity has a low self-esteem than similar age and causes emotional problems such as depression and anxiety. Moreover there is high probability of that lead to adult obesity which can cause various adult diseases. In this study, we develop the smart devices service for obesity management in youth to solve this social problem. Also we evaluate how the service influence on obesity problem solution of youth to analyze user assessment items of service.