• Journal of Korean Society of Transportation
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• v.20 no.1
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• pp.39-52
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• 2002

Traffic data by vehicle classification is difficult for mutual exchange of data due to the different vehicle classification from each other by the data sources; as a result, application of the data is very limited. In Particular. in case of TCS vehicle classification in national highways, passenger car, van and truck are mixed in one category and the practical usage is very low. The research standardize the vehicle classification to convert other data and develop the model which can estimate national highway traffic data by the standardized vehicle classification from the raw traffic data obtained at the highway tollgates. The tollgates are categorized into several groups by their features and the model estimates traffic data by the standardized vehicle classification by using the point estimation and bootstrap algorithm. The result indicates that both of the two methods above have the significant level. When considering the bias of the extreme value by the sample size, the bootstrap algorithm is more sophisticated. Using result of this study, we is expect the usage improvement of TCS data and more specific comparison between the freeway traffic investigation and link volume on freeway using the TCS data.

• Journal of the Korean Society of Food Culture
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• v.2 no.2
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• pp.133-147
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• 1987

The sensory quality characteristics of 7 different types of Korean traditional tea products were analyzed. For the standardization of sensory testing condition, the optimum drinking temperature were measured with 50 students, and all the samples tested were found to fall in the range of $60-70^{\circ}C$. The optimum concentrations of tea for drinking were generally met with the amount recommended by the producer. A total of 45 sensory describing terms expressing the taste, odor, and mouthfeel were collected. Using the sensory describing terms as the character notes, flavor profile analysis was made for each tea product with 8 members of trained panel. The differences in quality characteristics of 29 test samples were evaluated and shown in the chart constructed by the quantitative descriptive analysis method.

• Proceedings of the KSR Conference
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• 2003.05a
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• pp.151-158
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• 2003

현재 각 도시철도 운영기관이 사용하고 있는 부품코드체계는 구 정부물품 분류체계 11자리를 수요한 코드체계로의 군, 급의 2단계 분류로 구성되어 있어, 분류단계의 제약이 존재할 뿐만 아니라 분류체계의 구조적 문제로 군, 급, 품명의 빈번한 통합, 삭제에 따른 코드 관리의 어려움이 존재하고 있다. 또한, 사용자가 원하는 물품을 해당 분류체계로 찾아가기 위한 그룹별 탐색과 통계적 분석이 불가능한 실정이다. 이러한 분류체계의 문제점과 향후 차종의 노후화로 발생될 관리품목의 증가로 업무능률 저하가 예상되기 때문에 새로운 체계의 표준화된 부품코드체계가 절실히 필요한 실정이다. 본 논문은 산업 발전에 따르는 확장성과 세분화에 대한 분류구조의 탄력성을 가지고 객관적으로 분류 추가 및 변경이 가능하도록 하고, 정부 및 국제기관 표준권고안과 호환성을 가질 수 있는 표준 부품코드체계를 제정하기 위한 연구결과이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.639-642
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• 2007

기존의 명함 관리는 저장된 연락처 정보가 변경되었을 때 사용자가 수동으로 정보를 변경해야 했고, 표준화 되지 않는 항목으로 인해 여러 응용사이에 정보의 교환이 원활하지 않았다. 이러한 불편함을 해소하기 위해서 원활하게 명함을 상호교환 할 수 있는 전자명함의 개념을 도입하여 항상 최신의 정보를 유지할 수 있는 시스템이 필요하였다. 본 논문은 현재 차세대 웹 기술로 각광받고 있는 시맨틱웹 기반 기술인 RDF와 전자명함의 표준으로 자리 잡은 IMC에서 제공하는 vCard를 이용하여 'e-명함'의 개념을 설계하였고, 기존의 단순한 상호교환용 파일역할만 했던 vCard의 개념과 달리 개인의 고유한 URI를 가질 수 있게 하여 하나의 DB 또는 사이트 내에서만 연락처 정보가 관리되지 않고 표준화된 정보를 통해 보다 정확하고 신속한 관리기능을 갖춘 'e-명함' 시스템을 개발하였다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.15 no.2
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• pp.85-94
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• 2016

Lane Designation is defined as reasonable road management to ensure the road safety and enhance road efficiency. While the lane designation system was abolished in 1999, it was redefined because of the increasing number of large vehicles in the passing lane, violent on driving and traffic accidents in 2000. The needs of improvement on operating the lane designation has been increasing more in recent due to the low ratio of compliance with the system and difficulties to keep the right lane due to need of turning and demand of widening of designates lane for two-wheeled vehicles and truck. In this study, we presented the improvement plan through the question survey, simulation analysis, safety evaluation. It found a problem that the low-speed vehicle is to use the upper level roadway, difficulties of supervision, the imbalance in the lane use, imbalance traffic and does not match the international standards. This study suggested five different alternatives through the survey. micro simulation has used in order to examine each alternative by management effectiveness and feasibility. It analyzed the traffic speed, efficiency, traffic balance of alternatives. Also, safety evaluation conducted in terms of the range of field-of-view to ensure the easiness of field of view by various configurational difference between the vehicles. By the analysis results of such indicators, This study presents proposals for improvement in operating designated lane that low-speed-big-sized vehicles keep to the right lane, and high-speed-small sized vehicles keep to the left lane.

• Clean Technology
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• v.18 no.4
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• pp.373-378
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• 2012

The end-of-life vehicles (ELV) are important recycling sources, and there are several stages involved in the recycling such as dismantling, shredding, and treatment of shredder residues (ASR). The legal recycling rate should be at least 95% on and after 2015, while we need a proper system to monitor recycling of ELV components and to calculate the practical recycling rate. The paper suggests a monitoring system that calculates practical recycling rates of dismantled components by use of a database of standard recycling rate as well as a web-based monitoring, which is linked to the Eco Assurance system for electric & electronic equipment and vehicle (EcoAS). Also the system supports dismantling and monitoring process by incorporating a standard vehicular component database, which facilitates recording dismantled weight data but also monitoring of dismantled components.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.1
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• pp.126-142
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• 2023

The purpose of this study is to develop unmanned traffic enforcement equipment and standard specifications for the prevention of traffic accidents and violations of the two-wheeled vehicle laws. To this end, we conducted a review of the problems and new technologies of the currently operating unmanned traffic enforcement equipment on two-wheeled vehicles. And through a survey, the feasibility of introducing unmanned traffic enforcement equipment for two-wheeled vehicles and the current status of technology were investigated. In addition, the two-wheeled vehicle enforcement function was implemented through field tests of the development equipment, and the addition of enforcement targets and the number recognition rate were improved through performance improvement. Based on the results of field experiments and performance evaluation, performance standards for unmanned two-wheeled vehicle traffic enforcement equipment were prepared, and in the communication protocol, two-wheeled vehicle-related matters were newly composed in the vehicle classification code and violation items to develop standards.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.1A
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• pp.39-49
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• 2008

Dynamic responses of steel plate girder bridges considering road surface roughness of bridge and bridge-vehicle interaction are investigated by numerical analysis. Simply supported steel plate girder bridges with span length of 20 m, 30 m, and 40 m from "The Standardized Design of Highway Bridge Superstructure" published by the Korean Ministry of Construction are used for bridge model and the road surface roughness of bridge decks are generated from power spectral density(PSD) function for different road. Three different vehicles of 2- and 3-axle dump trucks, and 5-axle tractor-trailer(DB-24), are modeled three dimensionally. For the bridge superstructure, beam elements for the main girder, shell elements for concrete deck, and rigid links between main girder and concrete deck are used. Impact factor and DLA of steel plate girder bridges for different spans, type of vehicles and road surface roughnesses are calculated by the proposed numerical analysis model and compared with those specified by several bridge design codes.

• Journal of Korean Society of Forest Science
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• v.101 no.2
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• pp.185-194
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• 2012

The purpose of this contribution is to develop the framework of a methodology for identifying potential errors in georeferencing and in an application of it using specimens of Ox-Knee, Achyranthes bidentata Blume in Korea. At infraspecific level, uncertainty of identification showed that 41% of A. bidentata var. japonica and 28% of var. bidentata were misidentified, suggesting that the uncertainty level was independent of the reliability of experts' identification. For georeference specimen records, 71 specimens out of total 303 were selected and utilized as occurrence data: Uncertainty was 32.4 km at maximum and was 0.1297 km at minimum (mean = 4,055 m, s.d. = 5,772 m). Var. japonica is common throughout most of the southeastern Korea and west coastal areas, while var. bidentata has been found as far north as Gyeonggi and Gangwon provinces. We modelled the potential distribution of two varieties using Bioclim approach in Korea based on several environmental factors. Our results indicated the most important region for var. japonica lies the west coast ranges and southern area, while for Chungcheongnam-do of potential high diversity occurs for var. bidentata. This study shows that the major factors to determine the distribution patterns of two varieties were thermal factors, rather than precipitation. The Bioclim model using geocode and georeferencing data makes the information increasingly useful and reliable. To improve data quality, it requires full management from data collection to final databases including data cleaning.

• The korean journal of orthodontics
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• v.33 no.5 s.100
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• pp.381-389
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• 2003

Mutans streptococci is the major causative factor in dental caries. Especially, orthodontic patients with fixed appliance are a risk group for dental caries. Because fixed appliances attached on teeth may change the environment of dental plaque, the enamel decalcification or dental caries around the bracket and band is a major side effect of orthodontic treatmet. The aim of this study was to search plant extracts that have antimicrobial effect on mutans streptococci. Seed-extract of Casia torn were prepared with ethanol and CHMC-2032, the leaf-extracts from Camellia sinensis extract, was obtained extract, 2 type strains and 20 clinical isolates of mutans streptococci isolated from the interface between orthodontic brackets and tooth surfaces in the orthodontic patients were used in this study. The minimal inhibitory concentration of CHMC-2032 was 5mg/ml on the S. mutans KCTC 3065, S. sobrinus KCTC 3088, and 8 clinical isolates of S. sobrinus. However, there was no antibacterial effect of seed-extract of C. tora on mutans streptococci. These data suggest that green tea nay be more effective than the tea Prepared from C tora In the prevention of enamel decalcification or dental caries around brackets.