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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.
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.
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.
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.
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.
권광일(Kwon Kwang Il),윤성원(Yoon Sung Won),김소진(Kim So Jin),강하니(Kang Hani),김해나(Kim Hae Na),김지영(Kim Jee Young),김서영(Kim Seo Young),김길례(Kim Killye),이준형(Lee Jun Hyung),정선미(Jung Sun Mi),옥소원(Ock So Won),이은주(Lee E 韓國營養學會 2010 Journal of Nutrition and Health Vol.43 No.2
본 연구에서는 가공식품 및 외식업체 메뉴의 영양표시 시행에 대한 소비자들의 인식도를 조사하였다. 본 조사는 전국 20세~59세의 부모 1,507명을 대상으로 하여 전화 면담으로 이루어졌다. 전체응답자의 89.8%가 가공식품에 영양표시가 있다는 것을 알고 있었으며, 응답자중 72.3% 가 식품 구입시 영양표시를 확인하는 것으로 나타났다. 우선적으로 확인하는 영양표시 항목은 지방 (57.1%), 열량 (56.3%), 나트륨 (49.0%)이었으며, 알기 쉽고 눈에 잘 띄도록 표시되기를 원하는 항목은 트랜스지방 (62.1%), 콜레스테롤 (26.9%), 열량 (23.9%), 나트륨 (21.0%)순이었다. 외식에 영양표시를 시행할 경우 90.6%의 응답자는 영양표시가 메뉴선택에 영향을 미칠 수 있다고 응답하였다. 패스트푸드 이외에 영양표시 시행을 원하는 외식업체는‘피자 및 치킨’이 60.7%로 가장 높았다. 외식영양표시 시행 시우선적으로 표시하기를 원하는 영양성분은 열량 (62.0%), 지방 (60.3%), 나트륨 (50.9%)으로 나타났다. 본 조사결과 소비자들은 외식 영양표시 실시에 대하여 매우 호의적이며, 표시영양성분 중 열량을 가장 중요시 하는 것으로 조사 되었다. 따라서 소비자가 현명하게 식품을 선택할 수 있는 제도가 마련되어야 할 필요가 있는 것으로 사료된다. Consumer perception of processed food and restaurant food’s nutrient labelling was surveyed. The subjects of this survey consisted of 1,507 parents, whose ages were 20-59 years old. The ratio of the respondents that have known nutrition labelling on processed foods was 89.8% and the ratio of whom have checked the nutrition labelling at their point of purchase was 72.3%. The nutrients which were considered important for nutrition labelling were fat (57.1%), calorie (56.3%) and sodium (49.0%). Also nutrient which were able to be recognized at a glance by the subjects were in the order of trans fat (62.1%), cholesterol (26.9%), calorie (23.9%) and sodium (21.0%). If restaurant menu’s nutrient labelling be enacted, the answer rate that the menu’s nutrition labelling may affect their menu choice is 90.6% of the respondents. Besides of the Fastfoods that are enforcement, restaurants of that customers want the menu to be labeled were ‘pizza and chicken restaurants’. Nutrients that customers preferred to be labelled were calorie (62.0%), fat (60.3%) and sodium (50.9%).
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.