• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.285-286
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• 2023

The visualization of information serves as a valuable tool for facilitating communication and exchange of opinions among stakeholders by conveying information in an intuitive and clear manner. As a preliminary study of visualization for construction field, this study proposed a model for generating three-dimensional floor layout using 360-degree panoramic cameras. The model integrates the layouts by calculating normal vectors of the plane which has openings, and applying translation and rotation matrices between the normal vectors. The results of this study can contribute to improving communication in construction sites by incorporating visualization, and further to the digital transformation of the construction industry.

• Current Optics and Photonics
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• 제5권3호
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• pp.298-305
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• 2021

Modern distance sensing methods employ various measurement principles, including triangulation, time-of-flight, confocal, interferometric and frequency comb. Among them, the triangulation method, with a laser light source and an image sensor, is widely used in low-cost applications. We developed an omnidirectional two-dimensional (2D) distance sensor based on the triangulation principle for indoor floor mapping applications. The sensor has a range of 150-1500 mm with a relative resolution better than 4% over the range and 1% at 1 meter distance. It rotationally scans a compact one-dimensional (1D) distance sensor, composed of a near infrared (NIR) laser diode, a folding mirror, an imaging lens, and an image detector. We designed the sensor layout and configuration to satisfy the required measurement range and resolution, selecting easily available components in a special effort to reduce cost. We built a prototype and tested it with seven representative indoor wall specimens (white wallpaper, gray wallpaper, black wallpaper, furniture wood, black leather, brown leather, and white plastic) in a typical indoor illuminated condition, 200 lux, on a floor under ceiling mounted fluorescent lamps. We confirmed the proposed sensor provided reliable distance reading of all the specimens over the required measurement range (150-1500 mm) with a measurement resolution of 4% overall and 1% at 1 meter, regardless of illumination conditions.

• 한국실내디자인학회논문집
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• 제25권1호
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• pp.56-64
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• 2016

Housing for the elderly should be planned on the base of elder's needs and preferences as well as their physical, emotional, and socio-psychological characteristics. This study examined the interior style of bedroom and living room the elderly preferred and these preferences are significantly different depending on their characteristics and cognitive ages, or not. This study was carried out by face to face interview with a questionnaire and 6 colored printed 3D images. The subjects were 202 old aged who lives in Busan. The interior style of bedroom and living room were classified into 3 styles; Korean traditional style, Western classical style, and modern style. The subjects made a choice their preferred interior style among three 3D images per each room and answered the reasons. Also, they answered their cognitive ages and general characteristics, and their preferences for the layout of living room-dining room-kitchen, use pattern, floor finishes, and furniture of bedroom and living room. The results were as follows; 1) The subjects preferred bed in bedroom and sofa in living room. Also, they wanted to finish the floor of bedroom and living room by using synthetic material, traditional floor paper, and wood. 2) The elderly preferred Western classical style of bedroom. The reasons were general mood such as warm, comfort, or bright, and the color. 3) These preferred styles were not any significant differences according to their characteristics and cognitive ages. 4) They preferred Korean traditional style, Western classical style, and modern style, in order. They preferred them for their general mood and window. 5) Their preferred styles were significantly different according to their housing types and cognitive ages.

• 보존과학회지
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• 제34권6호
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• pp.539-548
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• 2018

본 연구는 문화재 방사선 조사에서 고려하지 않았던 산란 방사선의 영향을 확인하기 위해 관전압 (kVp)과 필름-바닥 거리(film-floor-distance: FFD) 납스크린 배치를 달리하여 평가하였다. 연구결과, 실험시편의 투과농도와 산란 방사선의 투과 농도는 관전압에 따라 증가되었다. 실험시편의 투과농도는 평균 1.4 D의 편차를 보이며, 60 kVp에서 0.17 D, 160 kVp에서 1.54 D, 220 kVp에서 2.97 D로 확인되었다. 산란 방사선의 평균 투과농도는 60 kVp에서 0.10 D, 160 kVp에서 0.40 D, 220 kVp에서 0.46 D로 확인되었다. FFD 거리가 바닥면과 멀어질수록 관전압(60 kVp-160 kVp)구간의 경우 투과농도 (D)가 커지는 경향을 보였으나, 고전압(160 kVp-220 kVp)구간은 FFD 거리 증가에 따른 투과농도 변화가 확인되지 않았다. 납스크린 없는 조건과 바닥면(floor)을 납스크린으로 대체한 경우는 FFD 50 mm, 100 mm, 200 mm 거리에서 산란 방사선이 확인되었고, FFD 0 mm 거리는 확인되지 않았다. 식별률은 관전압 160 kVp에서 FFD에 따라 2.08~2.67% 범위이며, 관전압 220 kVp에서는 2.67~3.33% 범위로 측정되었다.

• 문화기술의 융합
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• 제7권3호
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• pp.509-515
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• 2021

이 연구는 패스파인더 시뮬레이션 프로그램을 활용하여 학교의 피난 안전성 확보를 위한 효율적인 학급 층별 배치 방안 분석을 목적으로 한다. 경사로와 계단이 함께 설치된 고등학교 5층 건물을 대상으로 층별 인원배치에 따른 REST (Required Safe Egress Time, 피난소요시간)을 분석하여 효율적인 피난 방법과 안전성을 평가하였다. 현재 상태의 인원배치는 기준 RSET을 초과함으로써 피난안전성에 문제가 있다는 결과를 얻었다. 학생들을 3층, 4층, 5층에 배치했을 때 기준 RSET보다 가장 많은 시간을 초과하는 결과를 얻었다. 학생들을 1층, 2층, 3층에 배치했을 때 기준 RSET보다 가장 짧게 피난을 완료하는 결과를 얻었다. 현재의 상태에서 위치별로 피난출구를 지정하여 피난을 유도했을 때 기준 RSET을 단축시키는 결과를 얻었다. 결과적으로 고층 학교 건물에 학생들을 배치할 때는 저층부터 배치하는 것이 피난안전성 측면에서 효과적이며, 화재 시 위치별로 가까운 출구를 활용하여 피난할 수 있도록 피난출구를 지정한 사전 훈련이 필요하다. 향후 연구과제로 특정 위치에 화재가 발생했을 때 해당 위치의 자동방화셔터의 개폐여부에 따른 RSET에 대한 추가적인 연구가 필요하다.

• 한국주거학회논문집
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• 제20권6호
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• pp.67-76
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• 2009

As the needs of housing for the elderly has increased, many researches have been carried out and some housing projects for the elderly including nursing home began to be provided. Most researches have focused on the development of housing type or space layout and only several ones on interior design. The interior design in house influences physically or psychologically on the elderly who lives in. Also, the subject of them which examined the needs or preference for housing for the elderly were the middle-aged, not the aged. The purpose of the study was to examine the preferred characteristics of interior design in residential space by the elderly. The structured interview with 120 old persons who lived in Busan was carried out using by a questionnaire and 3D images. The elderly answered about the preferred interior style, color, lighting and interior finishes of each room in house, such as living room, master bedroom, kitchen, and bathroom. On the basis of the findings, the characteristics of interior design of each room in house which the elderly preferred were presented. In general, they preferred the mixed interior style with tradition and modem. Also, the reddish and purple interior color, flower or plant patterned wall finishes, and wood floor were preferred in living room and master bedroom by the elderly. The white interior color and one colored wall finishes without any pattern were preferred in kitchen and bathroom.