• 대한가정학회지
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• 제44권2호
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• pp.93-101
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• 2006

Children's wear needs extra safety features to avoid unexpected dangers. On the way to school, children are exposed to traffic very often. Especially in the early morning or late evening, or on dark cloudy days, they might be unrecognized by drivers without safety reflectors on their clothing as a means of raising visibility. Therefore, safety reflectors on clothing can protect children from traffic accidents. The research was carried out as follows. 1. Reflector manufacturers were interviewed regarding how Reflective and Reflexite reflect light back to the light source, what kind of safety reflector products are available, and how these materials are being used in the clothing industry. 2. Mothers of primary school children were interviewed to find out what they think about the effect of safety reflectors, the need for clothing using safety reflectors and the design preferences. 3. In order to apply safety reflectors efficiently, the position on the clothing of the greatest visibility from the light source must be determined. 4. Shirts, pants and jumpers for 8-year-old girls and boys were designed as a case study of applying safety reflectors to clothing. The designs were verified through wearing test.

• 한국조경학회지
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• 제26권4호
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• pp.1-13
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• 1999

Previous research for visual assessment of streetscape employed static simulation methods to represent future landscape. However, streetscape is experienced sequentially, and thus dynamic simulations can be more effective. This study tried to adopt computer animation in the evaluation of streetscape, and examined its effects and possibilities. Three development scenarios for the redevelopment districts of Sokong-Ro and Banpo-Ro in Seoul were designed, and simulations were produced by three methods-photo-retouching, computer still image, and animation. A preference questionnaire was asked to 69 university students, and the effects of simulation methods on visual preference were examined. In addition, the frames of the animation were reclassed to identify the visibility of physical elements. The relationships between the visibility and visual preference were analyzed. The results showed that visual preference can be explained by three factors-Amenity, Tidiness, and Variousness-that account for 62.4% of the total variance, and the Amenity showed the highest proportion: 36.0%. Among the three simulation methods, animation showed the largest difference in preference for the most important factor(Amenity), and yielded the highest correlation between visibility of physical elements and Amenity. This result demonstrated that dynamic simulations can provide more accurate observation of visual changes, especially because the simulated landscape is experienced sequentially. The results also revealed that the sequential change in the visibility of physical elements can be examined easily and precisely by animation. This benefit of animation enables analysts to identify the points where the landscape varies the most, and thus visual preference should be evaluated.

• The Journal of Asian Finance, Economics and Business
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• 제8권8호
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• pp.241-249
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• 2021

The aim of the research is to evaluate the impact of social media marketing (with special reference to Facebook) on the brand preference of customers with regard to smart mobile phones. Since Facebook has become very popular today and a trend has arisen to use social media as a marketing tool, the researcher intended to evaluate the impact of social media marketing on brand preference, as the findings would provide valuable insight for future businesses. Social media as measured social media visibility, social media engagement, and social media influencewas the independent variableand brand preference was the dependent variable. The convenience sampling method was used where the sample was taken from a group of people easy to contact or to reach. A sample of 186 young males and females was selected. Factor loading and factor analysis were used to analyze the data and find the most influencing factors on brand preference. Reliability analysis, validity analysis, and regression analysiswere performed to analyze the data. The R² value is 0.320 implying that 32.00% of the variance in brand preference is explained by social media influence, social media engagement, and social media visibility. The findings show thatsocial media visibility, social media engagement, and social media influencehave a positive impact on brand preference.

• 대한토목학회논문집
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• 제26권2D호
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• pp.219-223
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• 2006

본 연구에서는 대표적인 교통정보제공 장치인 VMS의 시인성을 향상시키기 위한 평가항목, 항목별 기준값 및 평가방법을 설정하고 이러한 평가를 수행할 수 있는 평가시스템을 구축하였다. 평가항목으로는 VMS 평가에 관한 기존의 우리나라, 유럽 및 미국의 지침 분석을 토대로 휘도, 휘도비, 빔폭, 색상, 균일성을 설정하였으며, 평가시스템은 고니오미터, 태양광 시뮬레이터, 휘도계, 감지기, 랙 시스템으로 구성하였다. 본 평가시스템 구축으로 향후 설치될 VMS의 시인성에 대한 객관적이고 효과적인 평가가 가능해질 것이다.

• 스마트미디어저널
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• 제1권1호
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• pp.80-83
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• 2012

본 논문은 사이버공간의 가시성 개선 방안을 다루었다. 사이버비즈니스에 진출하고자 생각하는 많은 사업가들은 사이버공간의 비가시성 문제로 인하여, 사이버비즈니스 진출에 두려움을 가지고 있다. 본 논문에서는 사업자와 잠재고객 그리고 그 사이의 관계를 수학의 관계 개념을 도입하여 설명함으로서, 사이버공간의 가시성을 개선하고자 시도 하였다. 본 연구를 통하여 사이버비즈니스 경쟁력의 핵심은 가시화의 극대화와 신뢰성임을 알게 되었다.

• 한국항행학회논문지
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• 제27권4호
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• pp.391-395
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• 2023

Helicopter accidents due to spatial disorientation in low visibility conditions continue to persist as a major issue. These incidents often stem from human error, typically induced by stress, and frequently result in fatal outcomes. This study employs machine learning to analyze flight data and evaluate the efficacy of a flight illusion detection algorithm, laying groundwork for further research. This study collected flight data from approximately 20 pilots using a simulated flight training device to construct a range of flight scenarios. These scenarios included three stages of flight: ascending, level, and descent, and were further categorized into good visibility conditions and 0-mile visibility conditions. The aim was to investigate the occurrence of flight illusions under these conditions. From the extracted data, we obtained a total of 54,000 time-series data points, sampled five times per second. These were then analyzed using a machine learning approach.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2000년도 춘계학술대회 논문집
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• pp.80-81
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• 2000

인위적인 에어로졸의 배출은 현대 산업발전과 급속한 도시화로 인해 가중되었으며, 인체 위해성이 높을 뿐만 아니라, 도시지역의 시정감쇄에도 크게 기여한다. 우리 나라에서 시정(visibility)에 대한 연구가 시작된 것은 지난 1980년 후반이었으며, 최근에 이르러 광학적인 연구가 함께 병행됨으로써 보다 과학적이며 체계적인 연구 성과를 얻고 있다. 시정감쇄 현상은 대기오염을 가시적으로 확인할 수 있는 지표중 하나로서 대기질의 광화학적 및 기상학적 변화에 따라 크게 영향을 받는다. (중략)

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2002년도 춘계학술대회 논문집
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• pp.233-234
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• 2002

시정(visibility)변화에 대한 색채학적 분석은 일정한 색채의 정보를 지닌 하늘을 대상으로 에어고졸에 의한 연무의 색성분과의 차이를 이용하여 색좌표계에서의 두 지점간의 거리를 계산하는 방법으로 이루어진다 배경대기 조건에서의 하늘은 가시광선의 파장보다 1/10배 이하의 입경을 지닌 가스상 물질들의 Rayleigh 산란에 의해 지배된다. 따라서 산란효과가 6배 이상 큰 파란색이 하늘의 색으로 발현된다. (중략)

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2002년도 추계학술대회 논문집
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• pp.137-138
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• 2002

입자상 물질은 자연적 또는 인위적인 오염원에 의해 직접 대기로 배출되거나 가스상 물질의 전환 과정을 통해 생성된다. 서울을 비롯한 우리나라 시정(visibility)은 맡은 부분이 가스상 물질의 전환을 통해 생성된 미세 입자에 영향을 받고 있기 때문에 미세 입자의 생성(formation)과 성장(growth) 변화를 연구하는 것은 시정(visibility)의 원인을 밝히는 중요한 과정이라고 할 수 있다. (중략)

• 한국도로학회논문집
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• 제18권6호
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• pp.87-96
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• 2016

OBJECTIVES : A fog generated field test was conducted to analyze the relationship between different sizes of variable speed limit signs and the legibility distance under various fog density conditions. By using this study, appropriate sizes of signs can be selected depending on the density of fog. METHODS : An actual tunnel was selected as the area for this test, as other places cannot maintain the fog condition because of rapid air current. A total 121 subjects were recruited for this test, which took place over the course of four days. The test on the first day was conducted under normal weather conditions for comparison. Visibility-distance detecting sensor was used to measure the visibility distance due to the fog density time, simultaneously with the evaluation of legibility distance by subjects. RESULTS : The test results show the relationship between the different sizes of signs and the legibility distance corresponding to the visibility distance due to both non-fog and fog generated conditions. According to the technical test results, appreciable amount of reduction in legibility distance due to fog was resulted in all sizes of signs. Moreover, the legibility distance is reduced proportionately with the decrease in the visibility distance due to fog. CONCLUSIONS : The results of this study can be used to select appropriate sizes of valuable speed signs under fog conditions. Hence, drivers can expect to have more room to respond to adverse weather conditions, thereby reducing the risk of accidents.