• 제목/요약/키워드: Illumination Environment

검색결과 450건 처리시간 0.027초

디스플레이에서 조도와 대비비에 따른 가독성 비교 연구 (A Comparison of Legibility Based on Illumination Intensity and Contrast Ratio in Displays)

  • 홍지영;민장근
    • 한국인터넷방송통신학회논문지
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    • 제17권4호
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    • pp.71-76
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    • 2017
  • 사물을 분석하고 인지하는 분야에 해당하는 시지각은 시각의 생리학적인 측면과 시각체계의 인지적 측면에 대해 많은 연구가 이루어져 있으며 이를 바탕으로 설립된 시지각 이론이 각 분야별로 다양한 응용 가능성을 모색하고 있는 실정이다. 그러므로 뉴미디어 시대의 대표적 사례물 중 하나인 모바일 디스플레이가 강조되는 가운데, 시지각 연구를 기반으로 하여 보다 효용성 있는 시각적 인지 기반의 비중을 늘려야 한다는 인식이 본 연구의 기본적인 이해이다. 본 연구는 모바일 디스플레이를 대상으로 하여 조도와 배경의 밝기에 따른 가독성 관련 실험을 진행하고 이를 분석하였다. 이를 위해 두 가지 조건에 해당하는 조도의 환경 조건과 기존 모바일 디스플레이에서 가독성 향상 방안으로 제안되는 두 가지 배경의 밝기 조건을 대상으로 하여 가독성 관련 실험을 진행하였다. 본 연구에서 진행된 실험결과를 분석하여 조도와 배경의 밝기에 따른 가독성에 대해 유의미 여부를 정의하고 가독성 향상을 위한 방안을 제시한다.

교사환경기준에 관한 연구 (A Study on Environmental Standards of School Building)

  • 홍석표;박영수
    • 한국학교ㆍ지역보건교육학회지
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    • 제1권1호
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    • pp.11-43
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    • 2000
  • The purpose of this study was, through analyzing the previous researches, to grasp the present status of environment of school building(ESB), research the sundry records of each element and, through comparative analysis of the standard of ESB in Korea, the United States, and Japan, select the normative standard of ESB, to clarify the point at issue presented in Regulation of Construction & facility Management for Elementary and and Secondary School in Korea, and to suggest an alternative preliminary standard of ESB. To carry out a research for this purpose, these were required: 1. to investigate the existing present status of ESB, 2. to make a comparative analysis of the standard of ESB in each country, 3. to suggest the normative standard of preliminary standard of ESB, 4. to analyze the controversial points of the standard of ESB in Korea, 5. to suggest an alternative preliminary standard of ESB. The conclusions were as follows: 1. Putting, through analyzing the previous researches, the existing present status of ESB together, it seemed that lighting environment, indoor air environment and noise environment were all in poor conditions. 2. In the result of a comparative analysis of the standard of ESB in Korea, Japan and the United States, in Korea the factors of each lighting and indoor air environment were not presented properly, in Japan, in lighting environment aspect, the standard on natural lighting and the factors on brightness were not presented., and in the USA the essential factors of each environment were throughly presented. In the comparison of the standards on each factor, Korea showed that the standard level presented was less properly prescribed than those of the USA and Japan but it also showed that the standard levels prescribed in the USA and in Japan were mostly similar to the standard levels in records investigated. 3. With the result of the normative standard selection on School Builiding environment factor of prescribed in this study, the controversial points of the standard of ESB in Korea were analyzed and the result was utilized to suggest new preliminary standard of ESB. 4. As the result of the analysis of the controversial points of the standard of ESB in Korea, it was found that the standard of ESB in Korea should be established on a basis of School Health Act and be concretely presented in School Health Regulation and School Health Rule. The factors of each environment was improperly presented in the existing standard of ESB in Korea. Moreover the standard of them was inferior to that of the records investigated and those of in the USA and in Japan and it also showed that the standard of it in Korea was improper to maintain Comfortable Learning Environment. 5. A suggested preliminary standard of ESB acquired through above study as follows: 1) In this study a new kind of preliminary standard of ESB is divided into lighting environment, indoor air environment, noise environment, odor environment and for above classification, reasonable factor and standard should be established and the controling way on each standard and countermeasures against it should be considered. 2) In lighting environment, the factors of natural lighting are divided into daylight rate, brightness, glare. In the standard on each factor, daylight rate should secure 5% of a mean daylight rate and 2% of a minimum daylight rate, brightness ratio of maximum illumination to minimum illumination should be under 10:1, and in glare there should not be an occurrence factor from a reflector outside of the classroom. And the factors of unnatural lighting are illumination, brightness, and glare. In the standard on each factor, illumination should be 750 lux or more, brightness ratio should be under 3 to 1, and glare should not occur. And Optimal reflection rate(%) of Colors and Facilities of Classroom which influences lighting environment should be considered. 3) In indoor air environment factors, thermal factors are divided into (1) room temperature, (2) relative humidity, (3) room air movement, (4) radiation heat, and harmful gases (5) CO, (6) $CO_2$ that are proceeded from using the heating fuel such as oval briquettes, firewood, charcoal being used in most of the classroom, and finally (7) dust. In the standard on each factor, the next are necessary; room temperature: $16^{\circ}C{\sim}26^{\circ}C$(summer : $E.T18.9{\sim}23.8^{\circ}C$, winter: $E.T16.7{\sim}21.7^{\circ}C$), relative humidity: $30{\sim}80%$, room air movement: under 0.5m/sec, radiation heat: under $5^{\circ}C$ gap between dry-bulb temperature and wet-bulb temperature, below 1000 ppm of ca and below 10ppm of $CO_2$, dust: below 0.10 $mg/m^3$ of Volume of dust in indoor air, and ventilation standard($CO_2$) for purification of indoor air : once/6 min.(about 7 times/40 min.) in an airtight classroom. 4) In the standard on noise environment, noise level should be under 40 dB(A) and the noise measuring way and the countermeasures against it should be considered. 5) In the standard on odor environment, odor level under Physical Method should be under 2 degrees, and the inspecting way and the countermeasures against it should be considered.

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농촌지역 독거노인주택의 겨울철 실내환경 실태 (The Actual State of Indoor Environment in Solitary Elderly Houses at Rural District during Winter)

  • 최윤정;김윤희;김란희
    • 한국주거학회논문집
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    • 제21권3호
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    • pp.1-9
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    • 2010
  • The purposes of this study were to determine the actual state of indoor environments of solitary elderly houses in the rural district during winter and to analyze the relationship between the influencing factors and indoor physical elements. Field surveys consisted of measurements of physical elements, observations of living factors, and resident's responses in interviews. Field surveys were carried out in 4 houses from $28^{th}$ of February to $2^{nd}$ of March 2008. The elements measured were air temperature, relative humidity, floor temperature, seating-place temperature, CO2 concentration, CO concentration, and illumination. The results showed that the average indoor temperature for houses was $13.5{\sim}22.5^{\circ}C$, relative humidity was 30.6~55.4%, floor temperature was $13.9{\sim}24.0^{\circ}C$, temperature when seated was $27.6{\sim}51.1^{\circ}C$, $CO_2$ concentration was 1434.6~3305.5 ppm, CO concentration was 2.8~8.4 ppm, and illumination was 31.0~96.7 lux. The residents' clothing values were 1.10~1.78 clo. The environment was evaluated as being in an unsuitable state, and it was revealed that the main reason was the lack of heating and ventilation.

농촌지역 독거노인주택의 겨울철 실내환경 실태 (The Actual State of Indoor Environment in Solitary Elderly Houses at Rural District during Winter)

  • 최윤정;김윤희;김란희
    • 한국주거학회:학술대회논문집
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    • 한국주거학회 2008년 추계학술발표대회 논문집
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    • pp.452-457
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    • 2008
  • The purposes of this study were to determine the actual state of indoor environment and to analyze the relationship between the living factors and indoor physical elements in solitary elderly houses at rural district during winter. The field surveys were consisted of measurements of physical elements, observations of living factors, and interviews of resident's responses. The field surveys were fulfilled in 4 houses from February to March 2008. Measuring elements were air temperature, relative humidity, floor temperature, seated place temperature, $CO_2$, CO, and illumination. The results showed that the average of indoor temperature for houses was $13.5{\sim}22.5^{\circ}C$, relative humidity was $30.6{\sim}55.4%$, floor temperature was $13.9{\sim}24.0^{\circ}C$, seated place temperature was $27.6{\sim}51.1^{\circ}C$, $CO_2$ was $1434.6{\sim}3305.5ppm$, CO was $2.8{\sim}8.4ppm$, illumination was $31.0{\sim}96.7lux$. The residents' clothing values were $1.10{\sim}1.78clo$. Most of the residents' subjective responses were in discord with the physical elements. It was evaluated to be uncomfortable state, and the main reason was revealed lack of heating and ventilation.

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강의실 빛 환경의 층별 , 시간대별 비교연구 (A comparative study on the light environment of the classroom classified by floor , time)

  • 곽경숙
    • 한국주거학회논문집
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    • 제4권2호
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    • pp.1-9
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    • 1993
  • This study is a basic research to analyze and estimate the light environment of the classroom by serial correlation of time. Its purpose lies in the comparison by time period in order In select floor for laboratory and to calculate the uniformity factor. The proving ground is T building in W university, Which is five floor of central hall type. The subject of investigating is eight classrooms, four rooms in South and North, from the second floor that is net influenced by the shelter. The results that compared and estimated them in the illumination of daylight, Uniformity factor, Daylight factor, are as follows1. The illumination of classroom in South and North is over 10001x, but the classroom in North is good and the classroom in South excellent.2. The uniformity factor of classroom in South is good and that of classroom in North is normal.3. The daylight factor of each classroom is over 5% but the classroom in South is above that in North. The classroom in South surpasses the classroom in North in the general light environment and the classroom in third and fourth floor is so better than that in second and fifth floor in the condition of laboratory In the uniformity factor, the classroom in fourth can be better than any classroom.

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아파트 리모델링의 실내환경 계획지침 개발 (Development of Guidelines for Indoor Environment in Apartment Remodeling Projects)

  • 최윤정
    • 한국주거학회논문집
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    • 제20권3호
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    • pp.1-10
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    • 2009
  • The final aim of this study was to propose guidelines for the indoor environment of apartment remodeling projects. The first task of this study was to understand the major elements and the actual condition of the remodeling for apartment unit by carrying out in-depth interviews on residents and specialists. The open-access interviews were conducted with interior designers who have a wide experience of apartment remodeling and residents who live in recently remodeled apartment units. The second task was to evaluate the actual condition of the indoor environment and to analyze the main factors that affect the indoor environment in remodeled apartment units. Field measurements were carried out in twenty apartment units occupied after remodeling, recording indoor environment elements (indoor temperature, globe temperature, relative humidity, $CO_2$, CO, PM10, TVOC, HCHO, illumination, and equivalent noise level). Moreover, resident interviews and researcher observations were carried out to determine the contents of the remodeled unit and to investigate the architectural and living factors(like ventilation characteristics, etc.) related to the indoor environment. The results are as follows. The remodeling elements generally included the changing of lighting fixtures and finishing materials in all the spaces, the integration of the balcony into the children's room, the installation of furniture in the kitchen and the entrance, the changing storage furnitures and equipments in the bathroom. The average levels of each unit of relative humidity, $CO_2$, TVOC, HCHO, equivalent noise level, and illumination were proved to be on the whole in inadequate condition. The factors that affect these indoor elements were classified as remodeling factors (remodeling amounts, extent balcony integration, and lighting fixture exchange), ventilation characteristics, and living factors. According to these results, this research proposed the guidelines for the indoor environment in apartment remodeling projects.

도심 실내조경 식물의 적절한 생육에 필요한 광조건 - 서울시 광화문 교보생명빌딩 그린하우스를 대상으로 - (Light Conditions for Suitable Growth of Urban Interior Plants - In Case of Green House within Kyobo Building, Seoul -)

  • 이경재;최진우;배호봉;강현경
    • 한국조경학회지
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    • 제37권3호
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    • pp.113-124
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    • 2009
  • 본 연구는 교보생명빌딩 그린하우스를 대상으로 광조건에 따른 수목피해 및 생육상태 영향을 조사 분석하여 실내식물의 적절한 생육환경을 유지할 수 있는 적정 조도기준 도출을 목적으로 하였다. 광조건에 따른 조도현황과 고사목 교체주수, 수목피해율을 분석하여 생육조건에 따른 문제점을 파악하고 적정 조도기준을 도출하였다. 조도조사 결과 남측 음지와 양지에서 각각 531lux, 602lux로 가장 낮은 차이를 보인 반면에, 중앙 음지와 양지에서 210lux, 782lux로 약 500lux의 가장 높은 차이가 발생하였다. $1990{\sim}2004$년간 수목고사 조사결과 식재된 수목 중 아왜나무가 161주로 교체율이 가장 높았으며, 대나무 69주, 동백나무 40주, 후피향나무 40주 등의 순으로 조사되었다. 수목피해도 결과는 수종에 관계없이 채광이 양호한 양지구역에서는 평균 수목피해율이 $4.4{\sim}6.4%$로 경미하였으며, 음지구역에서는 수목피해율이 $21.9{\sim}48.8%$로 심각한 피해현상이 나타났다. 조도를 독립변수로, 수목피해도를 종속변수로 상관분석과 회귀분석을 각각 실시한 결과, 조도가 낮아질수록 수목피해율은 증가하였다. 조도가 $500{\sim}600lux$ 사이에서 피해율이 급격히 감소하였으며, 700lux 수준에서 피해율이 최소화되었다. 따라서 실내식물의 광조건에 의한 피해율을 줄이기 위해서는 최소 700lux이상의 조도가 필요한 것으로 판단되었다.

대구·경북 지역 거실 조명 실태조사 (A Study on the Actual Conditions of Living Room Lighting in Daegu and Gyeongbuk Districts)

  • 조영미;안옥희;김현진
    • 한국주거학회논문집
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    • 제23권3호
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    • pp.13-20
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    • 2012
  • This research study was conducted to determine the actual conditions of living room lighting in Daegu and Gyeongbuk districts. For this study, 112 households were surveyed. The results of this study are as follows: Firstly, fluorescent light was used as the general illumination of living rooms, and the ratio of not using local sources of illumination was high. Secondly, the standard illuminance was found to be 221. The illuminance was the value that satisfied the activities for togetherness and entertainment, but did not reach the illuminance necessary for other activities, such as reading, make-up, and sewing. In addition, the uniformity of brightness used as a measure of uniformity in examining the results was normal. Thirdly, both the brightness and the satisfaction of lighting in the living room space were indicated to be normal. In addition, in regard to housing lighting, 'stability', and 'brightness of lighting' were indicated as important considerations and 'brightness of lighting', 'shadow' and 'management of lighting' were indicated as problem areas.

조명기구의 발열부하 저감을 위한 배기풍량 연구 (A Study of Exhaust Air Flow for Cooling Load Reduction from Interior Lighting)

  • 오병길;정민호;김회서
    • 설비공학논문집
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    • 제23권9호
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    • pp.604-609
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    • 2011
  • The increased quality of life requires indoor illumination environment to have illumination with higher intensity. The increase in indoor illumination goes hand in hand with increase in indoor heat load. Of late, the internal heat in the cooling load has been growing gradually and the proportion of the lighting load has been bigger in the cooling load. The objective of the experiment here is to estimate the proper exhaust air flow displacement to remove heat from different types of lighting equipment. The heat causing the cooling load in lighting equipment is the ratio of heat per watt and the ratio of space for heat. Experimental measurements of the constant temperature and humidity in chambers that exhaust air flow by changing the exhaust calorific value was measured. Using the Airflow exhaust heat from lighting fixture of this study should help to reduce House cooling load.

다른 조명 환경을 갖는 영상 간의 얼굴 교체 기술 (Face Replacement under Different Illumination Condition)

  • 송중석;XingjieZhang;박종일
    • 방송공학회논문지
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    • 제20권4호
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    • pp.606-618
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    • 2015
  • 컴퓨터 그래픽스(CG: computer graphics) 기술은 영화나 TV와 같은 미디어 컨텐츠에서 중요한 요소 기술로 자리매김하고 있다. 영상 속 특정 인물의 얼굴을 다른 사람의 얼굴로 교체하는 얼굴 교체 기술은 대표적인 CG 기술 중의 하나로써 오래전부터 많이 연구되어 왔다. 본 논문에서는 3D 모델을 사용하지 않고 특정 조명 환경을 갖고 있는 목표 동영상 속의 얼굴을 다른 조명 환경을 갖고 있는 참조 정지 영상 속의 얼굴로 자연스럽게 교체할 수 있는 기술을 제안한다. 실험 결과, 제안하는 방법이 서로 다른 조명을 갖고 있는 두 얼굴 간의 얼굴 교체를 자연스럽게 수행할 수 있는 것을 확인할 수 있었다.