• 한국산학기술학회논문지
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• 제14권1호
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• pp.385-392
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• 2013

안개로 인한 대형교통사고를 예방하기 위한 안개경고시스템의 핵심요소는 시정을 측정하는 장치이며, 최근 고가의 안개센서 보다 인간의 시정감각과 유사하면서도 저렴하고 정확한 시정측정장치에 대한 필요성이 증대되고 있다. 본 논문은 도로의 CCTV 카메라를 이용하여 시정을 측정하기 위해 개발된 도로시정측정시스템(RVMS)의 성능 평가 방법 및 결과를 제시하고, 고속도로 등 도로 적용에 따른 경제성과 활용방안을 제시한다. 성능평가는 여주시험도로에 전용 CCTV 카메라, 안개센서, 목측을 위한 시정표지를 설치하고 시험운영결과를 DVR에 기록하여, 특정 안개발생 시간대에 대해 RVMS와 안개센서 결과를 목측결과와 비교분석하였다. 실험결과, 목측을 기준으로 RVMS가 안개센서 대비 높은 측정안정성과 정확성을 가진 것으로 분석되었다. 또한, 본 논문에서는 RVMS가 기존 안개센서 대비 높은 경제성을 가지고 있음을 제시하고 RVMS의 다양한 활용방안을 제시한다. 높은 성능과 경제성을 가진 RVMS의 적절한 활용은 안개발생시 도로 이용자의 교통사고 예방뿐만 아니라 광역 시정정보 수집 및 활용에 획기적인 계기를 마련할 것으로 기대된다.

• Imaging Science in Dentistry
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• 제34권3호
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• pp.123-128
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• 2004

Purpose: To evaluate the reliability of measurements in spiral tomography through assessing the visibility of the alveolar crest and the measurements between the alveolar crest and other anatomic structures. Materials and Methods: 110 spiral tomograms of the jaws were taken by Scanora X-ray unit from the patients. The visibility of the alveolar crests was estimated by 3 observers and classified as clearly visible, questionable visibility, or not visible. 3 observers measured the distance between the alveolar crest and the reference points of anatomic structures. The measurements were repeated 2 weeks later. Results: 52.9% of alveolar crests on upper jaws and 61.5% of alveolar crests on lower jaws were visible. The interobserver and intraobserver agreements on the visibility were low. The mean ranges of the measurements were 1.39 mm (SD = 1.37 mm) on maxilla and 1.03 mm (SD = 1.01 mm) on mandible in the interobserver evaluation. The interobserver variance was greater than the intraobserver variance in the measurements of distance. Conclusion: Spiral tomography showed a relatively low reliability in the visibility and measurements of the alveolar crest.

• 한국군사과학기술학회지
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• 제19권5호
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• pp.613-617
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• 2016

Development-concerned parties, business managers and test evaluators have experienced conflicts among themselves due to the absence of standardized criteria for military electro-optical(EO) and infrared(IR) devices in test evaluation planning and evaluation phases. Therefore, establishment of objectified test and evaluation criteria for EO/IR devices is required. This paper applies South Korea's weather measurement average of minimum 15 km for visibility range, 3 bar from Johnson criteria for EO device and 4 bar from NATO's STANAG-4347 for IR device for target type, and 50 % probability for evaluation criteria, respectively. Based upon these criteria, this paper will establish suitable criteria that are improved for development weapon system in consideration of required capability of demanding forces and field environment.

• 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.

• 한국의류학회지
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• 제22권5호
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• pp.597-606
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• 1998

The purposes of the study were 1) to evaluate the visual image of colored Korean traditional dress for woman 2) to analyze the colors and, color combinations effect on the image perception using gestalt theory. The research method was a quasi-experimental with a between subjects design. The experimental materials developed for the study were a set of stimuli and a response scale. The stimuli was consisted of 17 drawings of females wearing Korean tradinational dress, by using CAD simulation. A response scale consisted of semantic differential scales. The subjects were 1138 undergraduate students of Taejon city, Chungnam province and Chungbuk province. Their responses to the semantic differential scales were analyzed using factor analysis, one-way ANOVA, Duncan's multiple range test, 1-test. Results were as follows; 1) The image of the stimulus was consisted of the 4 different dimensions.(sociability, evaluation, visibility, attractiveness) 2) Clothing colors had significant effects on image perception of the evaluation dimension, visibility dimension and attractiveness dimension in the mono-color set. The blue showed the most positive image on the evaluation dimension, and the yellow and the gray showed negative image on the same dimension. The yellow showed the most salient image and the gray showed the least salient image on the visibility dimension. The red showed the most attractive image and the green showed the least attractive image on the attractiveness dimension. 3) In hi-color set stimulus, the perceived image was influenced by color combinations. The yellow blouse-the red skirt set showed the most sociable image on the sociability dimension. The blue blouse-the green skirt set showed the most positive image on the evaluation dimension. The yellow blouse-the red skirt set showed the most salient image and the blue blouse-the green skirt set showed the least salient image on the visibility dimension. And the red blouse-the yellow skirt set showed the most attractive image on the attractiveness dimension. On conclusion the visual image of Korean traditional dress wearer was affected by dress colors and color combinations.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2014년도 추계학술대회
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• pp.347-348
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• 2014

본 연구에서는 항로표지의 배치를 정량적으로 평가하는 방법에 대하여 기술한다. 항로표지는 안전한 수로를 항해자에게 안내하기 위하여 시각적인 정보를 제공한다. 따라서 항해자가 항로표지를 시각적으로 인식하는 정도에 따라서 항로표지 배치의 효율성을 정량화할 수 있다. 즉, 항로표지의 배치는 시인성(visibility) 관점에서 정량적으로 평가될 수 있다. 본 연구에서는 배치된 항로표지에 대한 시인성을 정량적으로 평가하는 방법을 제시한다. 또한 선박해양플랜트연구소가 개발하고 있는 항로표지 시뮬레이터를 이용하여 시인성 정량적 평가 방법에 대한 검증을 시행한다.

• Imaging Science in Dentistry
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• 제46권4호
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• pp.245-249
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• 2016

Purpose: This study was designed to evaluate differences in the required visibility of anatomic structures according to the diagnostic tasks of implant planning and periapical diagnosis. Materials and Methods: Images of a real skull phantom were acquired under 24 combinations of different exposure conditions in a cone-beam computed tomography scanner (60, 70, 80, 90, 100, and 110 kV and 4, 6, 8, and 10 mA). Five radiologists evaluated the visibility of anatomic structures and the image quality for diagnostic tasks using a 6-point scale. results: The visibility of the periodontal ligament space showed the closest association with the ability to use an image for periapical diagnosis in both jaws. The visibility of the sinus floor and canal wall showed the closest association with the ability to use an image for implant planning. Variations in tube voltage were associated with significant differences in image quality for all diagnostic tasks. However, tube current did not show significant associations with the ability to use an image for implant planning. conclusion: The required visibility of anatomic structures varied depending on the diagnostic task. Tube voltage was a more important exposure parameter for image quality than tube current. Different settings should be used for optimization and image quality evaluation depending on the diagnostic task.

• 조명전기설비학회논문지
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• 제25권4호
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• pp.1-6
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• 2011

The elder population with 65 years old or more in Korea has been entered into an aging society as 9.1[%] in 2005 to 14.3[%] in 2018. The elder population in 2026 will be expected to 20.8[%] with the rapid aging society. In this study, there has been conducted a study on development of headlamp for elder friendly vehicle in order to ffrom two different groups, one group for elder with over 65 ages, the other group for compared ages(20 ages, 30~50 ages). Glare test and forward visibility test were performed on wet and dry road conditions. As the result of these tests, it showed to prefer headlamp installed partially yellow coated bulb, which gives warm feeling on dry road condition. Forward visibility of headlamp which developed to fit on wet road condition is similar to existing HID headlamp. Glare was evaluated less than halogen and HID headlamp. However, it need to more improve glare and forward visibility performance of headlamp for old drivers.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 추계학술대회
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• pp.335-338
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• 2017

시스템가시성의 통합 평가가 복잡한 ICMBS분야가 상용화 되면서 하드웨어시스템과 소프트웨어기술의 역할 변화가 필요한 시점이 다가오고 있다. 이 변화는 기술이 문화적으로 융합되면서 자연스럽게 스며들어 혼재하는 시기로 접어들고 있다. 통합시스템 범위가 예측할 수 없는 혼란스러운 공백상태를 불러올 수 있다. 시스템의 공백상태는 기술과 문화의 복잡한 상호작용을 통해 공급과 유지로 운용되는 생태계적인 특징을 갖는다. 유니버설미들웨어를 활용하게 되면 생명주기모델을 적용할 수 있으며 복잡성이 증가하는 시스템의 가시성을 높이고 혼란스러운 상태를 대비할 수 있다. 본 연구에서는 유니버설미들웨어를 기반으로 하여 데이터와 서비스모듈을 각각 유기적으로 표준화하여 안정적인 시스템가시성 플랫폼을 지원하는 모듈을 시험하고 평가하였다. 시스템가시성을 구성하는 모듈은 Intelligent Pervasive Cloud 모듈, Memorial Service 모듈, Life Cycler 연결 모듈로 구성하고, 각각의 모듈은 ICBMS에서 요청하는 시스템가시성에 대한 다양한 요구사항을 반영하였다. 또한, 분석결과를 플랫폼기반의 시스템독립적인 구조를 통해 다양한 네트워크응용서비스 표준을 지원하였다.

• 한국의류산업학회지
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• 제24권4호
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• pp.471-478
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• 2022

In roadside workplaces, more attention should be paid to the safety of workers. The roadside workers underestimate the effect of the brightness of their clothes and judge that drivers will recognize them easily, and the drivers misjudge that the roadside workers are far away and that the vehicle can be stopped in sufficient time. Therefore, customized safety education reflecting this and wearing work clothes with certified visibility functions are required. In Korea, it is not compulsory for roadside workers and vehicle guide attendants to wear work clothes with a visibility function. In this study, the distance ahead perceived by drivers was measured using manikins wearing certified and non-certified reflective safety vests. The perception distance of the non-certified reflective safety vest was 1.4 times longer than that of the certified reflective safety vest, thus confirming the importance of wearing a certified reflective safety vest. To prevent roadside workers from suffering traffic accidents, we propose the enactment of a law that makes it mandatory for them to wear high-visibility safety clothing. Specifically, Article 32 of the Enforcement Regulation of the Road Traffic Act should include high-visibility safety clothing in life protection equipment, and additionally, to prevent secondary accidents, we propose the enactment of a law requiring the installation and wearing of certified reflective safety vests in vehicles.