• KSCE Journal of Civil and Environmental Engineering Research
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• v.34 no.1
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• pp.185-194
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• 2014

This study investigates the methodology to evaluate the quantified performance of pavement markings and traffic guide signs using digital images. This methodology is significant to attempt to quantify their performance without large brightness photometer at the nighttime and bad weather. The retroreflective performance of pavement markings are evaluated through the contrast of gray levels of pavements and markings in collected digital images under the case of rain, dampness, and dryness. In addition, the appraisal of retroreflective performance of traffic guide signs are implemented through the comparison between interior illuminated and the existing retroreflective traffic guide signs using the contrast of luminance extracted from the value of RGB of backgrounds and legends in collected digital images according to geometric design, driving lanes, and the distance between the car and the sign. As a result, the retroreflective performance of pavement markings deteriorates about 3.5 times and 2 times under the case of rain and dampness respectively than dryness. Also, the performance of the existing traffic guide signs is significantly influenced by geometric design, driving lanes, and the distance, otherwise interior illuminated traffic guide signs. This methodology can be utilized to construct objective information of performance of traffic safety facilities to select appropriate position of expensive high reflective pavement markings and interior illuminated traffic guide signs considering diverse weather and geometric design.

• Journal of the Korean Society of Hazard Mitigation
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• v.6 no.1 s.20
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• pp.29-38
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• 2006

There are increasing needs to provide sufficient information on road directions through road signs for expanding cities and traffic networks. Improving efficiency of direction guidance information from road signs not only requires criteria for but also systematic approach to selecting place names that appear on road signs. As such, this paper looks at road direction information from existing road signs that leads to Suwon and investigates whether the current system of road signs provides efficient, systematic and continuous direction information for road users to easily reach their destination. In this paper, Suwon's city hall is set up as the final destination, which is linked from five other cities, Anyang, Osan, Ansan, Yongin and Seongnam. The paper attempts to find out whether there is continuity and suitable number of road signs for direction information by analyzing the road signs between these 5 cities and Suwon with respect to direction, direction advance notice and direction guidance. It is found that drivers cannot easily find the needed information on their destination from the existing road signs and that continuity of selected place names that systematically appear on road signs is insufficiency. In addition, direction guidance on road signs is problematic, because the appearance frequency of road signs is not adequate and the continuity of road signs is not effective. Moreover, there is insufficient information on local direction guidance for immediate destinations on road signs with respect to turning left or right or going straight.

• Archives of design research
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• v.17 no.1
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• pp.329-338
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• 2004

This study did derive a characteristic of a cover design through considering a concept, a function and components of a cover design based on a literature study and through analyzing cases of the best-seller cover designs for the literature section from 1999 to 2002. In terms of a reader's preference for a cover design according to an age and sex of a reader, it tried to suggest a condition and a method of a book-cover design through a questionnaire survey and the image evaluation. In a survey of the preference for a cover design, there was the difference of interest degree in a kind of a book, a place to buy a book and a cover design according to an age and sex. In addition, it was shown that a woman prefers the stylish typography, and both a man and a woman prefer the cool color. However, except these two, the reason why there is no difference in preference for visual elements are that a cover design is an integrative image comprising several elements. Accordingly, through the Semantic Differential Method, it carried out the evaluation as to a cover design as an integrative image. As a result of that, an abstract image was shown to be difficult to convey a meaning because of its fall in clarity. Further, a cover design mainly comprising the stylish typography gained the high evaluation in unique and clarity. It is thought to be attributable to the easiness to achieve a goal of seeing and reading in a cover design in which an image and the typography are balanced, rather than the excessive visual. Even though the visual is excellent, there was difference from what having been excellent in conveying a meaning, which is a functional aspect. This study tried to examine, limiting it only to a visual element. It will be hereafter required to proceed with a study on the influence on a reader's preference according to material, bookbinding and a form of book which are elements comprising a cover design.

• Journal of Navigation and Port Research
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• v.47 no.3
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• pp.128-133
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• 2023

In order for Aids to Navigation to provide sustainable services to users, it is possible when there is no Aids to Navigation accident. If an Aids to Navigation accident occurs, the manager should efficiently manage it to prevent the same accident. However, the current Aids to Navigation accident management only specifies the cause and type of the accident. There are no separate guidelines. Thus, the accident is recorded differently depending on the manager. Therefore, this study attempted to redefine Aids to Navigation accident. To this end, Aids to Navigation accidents that have occurred over the past 23 years (year 2000 to years 2022), IALA's Aids to Navigation information standard, S-201, and categories of accidents (traffic accidents and marine accidents) were analyzed. Causes of Aids to Navigation accidents were divided into internal and external causes. Accidents were divided into three types: Light tower accident, buoy accident, and equipment accident. By further subdividing primary items, the cause of accident was reestablished into 7 items such as mooring and bad weather and 11 items such as Light tower damage, buoy loss, and equipment breakdown. These research results can be used as basic data to provide future Aids to Navigation accident statistics.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.23 no.2
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• pp.1-14
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• 2024

The most optimal route-search algorithm thus far has introduced a method of applying node labels and link labels. Node labels consider two nodes simultaneously in the optimal route-search process, while link labels consider two links simultaneously. This study proposes a turn-label-based optimal route-search technique that considers two turns simultaneously in the process. Turn-label-based optimal route search guarantees the optimal solution of dynamic programming based on Bellman's principle as it considers a two-turn search process. Turn-label-based optimal route search can accommodate the advantages of applying link labels because the concept of approaching the limit of link labels is applied equally. Therefore, it is possible to reflect rational cyclic traffic where nodes allow multiple visits without expanding the network, while links do not allow visits. In particular, it reflects the additional cost structure that appears in two consecutive turns, making it possible to express the structure of the travel-cost function more flexibly. A case study was conducted on the metropolitan urban railway network consisting of transportation card terminal readers, aiming to examine the scalability of the research by introducing parameters that reflect psychological resistance in travel with continuous pedestrian transfers into turn label optimal path search. Simulation results showed that it is possible to avoid conservative transfers even if the travel time and distance increase as the psychological resistance value for continuous turns increases, confirming the need to reflect the cost structure of turn labels. Nevertheless, further research is needed to secure diversity in the travel-cost functions of road and public-transportation networks.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.04a
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• pp.467-470
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• 2010

국제항로표지협회(IALA)는 비정부간 기구로 전세계 항로표지의 조화와 향상을 통하여 선박의 안전과 경제적인 항행 지원 및 환경보호 도모에 기여하기 위하여 1957년 7월 최초 설립하여 운영하고 있으며, 금번 제 17차 총회에 참석하여 국제협력 결과와 선도방안에 대하여 항로표지관계자들에게 알려 많은 관심과 국제협력의 중요성을 높이고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.185-186
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• 2006

우리나라는 리아스식 해안으로 지형이 복잡하고, 특히 강하구에는 사주의 영향으로 선박의 통항로가 수시로 변화되고 있어, 어선들의 좌초사고가 빈번하게 발생하고 있으나, 수심이 옅고, 굴곡이 많아 등부표 등 항로표지의 설치가 불가능한 실정이므로, 이러한 지형 환경에 맞고, 비용이 저렴한 새로운 항로표지인 등주를 설치하기 위한 연구와 설치 후 효과분석을 기술한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.151-153
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• 2017

해상 특성으로 야간에 항로표지 충돌사고가 빈번하게 발생함에 따라 야간에도 주간처럼 사물 식별이 가능한 영상정보를 확인할 수 있는 고성능 촬영장비 도입하고 부산항 주요항로에 운영되고 있는 항로표지시설의 주 야간 상태 정보를 감시하여 항로표지 고시기능 유지 여부를 확인하고 선박 충돌에 의한 등부표 사고 발생시 가해선박을 색출하여 원인자에게 피해시설을 복구토록 함.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.326-328
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• 2013

선박의 고속화 및 대형화, 통항량의 증가와 더불어 항로표지시설에 대한 수요와 기능이 강조되는 시점에서 항로표지의 관리와 운영에 대한 보호 및 안전사고 예방을 위한 대책 일환으로 해상 환경에 맞는 감시장비에 대한 연구와 활용 방안을 제안하는 목적으로, 인력에 의한 관리 한계를 보완하고, 고비용 감시장비에 대한 예산 절감 대안을 제시하고자 하였다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.289-290
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• 2003

제주도의 하구역에는 12월에서 5월 사이 실뱀장어가 나타나며, 주로 1월에서 3월 사이 나타난다. 2003년 3월 및 4월 초 제주 천제연 하구에서 주 소상시기인 그믐 전후 족대를 이용하여 실뱀장어를 잡아 표지 방류하여 자원량 및 가입률을 추정하였다. 피부 착색용 중성염료는 부착용 표지 방류가 어려운 자치어를 비롯한 소형어류 표지로 이용되어진다. (중략)