• 국제학술발표논문집
• /
• The 6th International Conference on Construction Engineering and Project Management
• /
• pp.606-607
• /
• 2015

The traffic volume on the road shows various trends reflecting regional characteristics for monthly and hourly, and economic loss affecting users varies according to the selected period for the maintenance of road pavements. Therefore, in this study, the user cost (or delay cost) for monthly and hourly on the work zone near the Maesang Bridge Section on Poseung-Gu, Pyeongtaek-si, Gyeonggi-do was calculated using the time series models and VISSIM, and based on the result, the effect of user cost reduction according to the selection of best maintenance period was examined. The analysis result showed that the month of the lowest user cost occurred due to the maintenance of target section was January (10,293,258 KRW/Day×1km) and the month of the greatest user cost occurred was November (13,337,495 KRW/Day×1km).

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 1998년도 제 23회 정기총회 및 추계학술발표회
• /
• pp.11-25
• /
• 1998

Many Countries have made efforts to assist ships navigate accurately , safely and expeditiously for the safety control against increasing marine traffic , in their coastal waters. However, they are exposed in spite of these efforts,to risks of casulaties and marine polluation caused by traffic congestion when ships are navigating through waterways approaches to ports or harbors and in narrow fairways. Therefore, efficient control of VTS in Port is necessary nowadays to provide ships with necessary service , which interacts with shipping and organize the flow of traffic so as to maximize the efficiency of the port or harbor while minimizing the risk of accident and environmental pollution. Even though the navigation condition of ships is very inferior compared to other ports in Korea, such as the big difference between the ebb and flood tide, the frequent fog, the narrow fairway , the density of navigation traffic in Inchon Port is high and transportation quantity of dangerous cargoe increases gradually. In cosideration of the characteristics of natural circumstance and traffic circumstance the VTS established newly in Inchon port have to operate efficiently. The purpose of this study is to help efficient operation of VTS in Inchon port by accomplishing both the literature research and questionnaire survey. Questionnaire survey was read to the VTS personnel in Inchon Port and customer familiar to Inchon Port such as ship navigators, pilots, shipping companies and so on. Most of ship navigators who occupy half of the respondents are Korean Officer who had responded while they were calling at Inchon port. The conclusions and recommendations includes ; First, the service area should be extended over Designated area to provide the vessel with navigational assistance service regarding the information of traffic congestion area, fishing boat and small ship's activities. Second, the types of information service to be offered are ship's movement and weather condition inthe vicinity of the port and state of fairway in the approaching channel to thte fairway. Third, VTS personnel should be upgraded by the on-the-job training and continuous simulation training as well as supplement of the qualified personnel for VTS operation. Fourth , the Harbor Master System to be introduced for safe navigation and efficient port operation.

• 한국융합학회논문지
• /
• 제10권12호
• /
• pp.17-22
• /
• 2019

네트워크 트래픽 세션 데이터를 이용한 공격 분석 및 시각화 방법들은 세션 데이터 내의 송신지 및 수신지 IP주소 및 연결관계를 시각화하여 네트워크 이상 현상들을 감시한다. 트래픽의 송수신 방향은 이상 현상을 탐지하는데 있어서 매우 중요한 특징이지만, 단순히 송신지와 수신지 IP주소를 좌·우 또는 상·하 대칭적으로 시각화하는 것은 분석을 난해하게 만드는 요소가 된다. 또한, 시계열적인 트래픽 세션들의 시간 특성을 고려하지 않고 시각화 인터페이스를 설계할 경우에는 시간별 보안 상황 정보가 손실되는 위험을 감수해야 한다. 본 논문에서는 방사축을 이용하여 시계열 트래픽 데이터를 시각화하고 IP주소를 네트워크 부분과 호스트 부분으로 분할 및 원통좌표계에 표출시켜 효과적으로 네트워크 공격을 감시할 수 있는 시각화 인터페이스와 분석 방법을 제안하고자 한다. 제안하는 방법은 네트워크 공격을 직관적으로 인지하고 공격 활동을 시간흐름에 따라 파악할 수 있는 장점을 가진다.

• 대한한방소아과학회지
• /
• 제26권2호
• /
• pp.35-46
• /
• 2012

Objectives The purpose of this study was to find out the characteristics of children patients who had been treated in the Oriental Medical Hospital due to traffic accidents. Methods The study was carried out with 121 children patients who visited the Oriental Medical Hospital from April 2011 to March 2012 and was analyzed by reviewing the patients' charts. Results In the distribution of sex the ratio between boys and girls were similar, but regarding the age, 0~6 year-old group was more than that of 7~15 year-old group. In the traffic accident patterns, 87.6% of the entire children patients were injured by car crash. The highest type in the collision between cars was rear-ending impact. The most patients (48.8%) visited our hospital for oriental medical treatment in less than 3 days after the traffic accident. The number of the first visitors in the Oriental Medical Hospital were 77 (63.6%) and those who visited other western hospitals before and were 44 (36.4%). The most frequent duration of admission and treatment in OPD was less than 7 days. Sleeping disorders (37.1%) were diagnosed the highest in 0~6 year-old group and C-spine sprain (49.0%) was diagnosed the highest at 0~7 years-old group. Herb medications were prescribed to relieve anxiety for 0~6 year-old group and for 7~15 year-old group, those were prescribed to activate blood eliminating phlegm and to normalize Qi flow. The highest effective treatment period was less than 7 days. Conclusions This data suggested that the oriental medical care could be more effective in treating children victims of traffic accidents by confirming many different symptoms depending on the age.

• 한국ITS학회 논문지
• /
• 제16권5호
• /
• pp.38-48
• /
• 2017

속도, 점유율, 교통량 등의 링크 속성은 교통계획 및 운영에 필수적인 요소이다. 따라서 링크 속성 정보를 수집하기 위한 센서들의 최적 위치를 결정하는 것은 지능형교통시스템(ITS)의 중요한 의사결정 중 하나이다. 본 연구는 전체 네트워크 교통정보의 변동성을 최소화하기 위한 네트워크 센서의 최적 입지를 결정하는 모형을 개발하는 것을 목적으로 한다. 이를 위해 데이터 수집의 이산적 특성을 반영한 네트워크 센서 위치 모형(NSLM)이 개발된다. 교통 정보의 변동성 지표는 분산-공분산 행렬의 대각요소의 합을 통해 계산된다. 개발된 모형의 적용가능성을 평가하기 위해, 대구광역시 도로에서 단거리 전용 통신(DSRC)으로 수집되는 속도 자료가 이용된다. 본 연구는 지능형교통시스템(ITS)의 투자 효율성을 제고하고 정보 정확도를 개선하는 데에 기여할 것으로 기대된다.

• 한국ITS학회 논문지
• /
• 제11권6호
• /
• pp.145-154
• /
• 2012

본 논문은 고속도로 터널구간을 대상으로 교통사고특성을 다각적으로 분석하여 다양한 독립변수를 선정하고 종속변수를 건, 건/km, 건/백만대km로 다양화하여 다중선형회귀모형을 개발하였다. 그리고 개발된 모형들은 상호 비교 검토하여 최종적으로 교통사고영향요인으로 구성된 신뢰성 있는 교통사고예측모형을 결정하였다. 교통사고예측모형은 모형의 $R^2$, F값 등 검정통계량 수준, 다중공선성, 잔차분석 등 모형검증과정이 수행되었고 터널구간의 교통사고특성 반영여부 등을 검토하여 최종적으로 터널길이에 따라 총 2개의 모형을 선정하였다. 선정된 종속변수는 ln(건/백만대km)이며, 독립 변수는 연평균일교통량(AADT), 종단구배, 터널높이로 구성되었다. 추정모형은 RMSE, MAE를 이용하여 예측한 값과 실제 관측값과의 차이를 분석하여 터널구간의 교통사고를 설명하는데 적합한 모형으로 파악되었다.

• 오토저널
• /
• 제6권4호
• /
• pp.36-45
• /
• 1984

The relationship between vehicle driving pattern and fuel consumption in urban area was studied in Seoul along three representative routes using a test car equipped with all the instruments required for recording modes of traffic and measuring fuel consumption. Correlation with idle speed, fuel consumption and CO concentration of car in use was also measured. The average vehicle speed in Seoul was 31.4 km/h and the time spent in different modes was 23.0% in idle mode, 22.5% in acceleration mode, 32.4% in cruising mode and 22.3% in deceleration mode, respectively. Hence, traffic flow was suggested to be relatively smooth. Fuel consumption per unit distance, .phi. was closely related with trip time spent per unit distance, t, and correlation coefficient obtained from the test car was 0.925, and the relationship between .phi. and t was also obtained from the linear regression with the following equation. .phi.=42.87+0.38 t. Idle speed of vehicle in use was mostly adjusted low and cars which were over the permissible standard of CO concentration (4.5%) were 50% or more. As the idle speed decreased, the fuel consumption was decreased, while the CO concentration was increased. Therefore, the decrease of fuel consumption can not be expected with only a decrease in idle speed.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제15권4호
• /
• pp.1216-1231
• /
• 2021

With the increase in the population of our cities and the rapid increase in the number of private cars, urban traffic has become more and more congested. At this stage, urban public transportation has become one of the main ways to improve urban traffic congestion. Aiming at the problem of how to improve the basic capacity of buses in multi-line transfer stations, this paper conducts simulation research based on anylogic software. Through micro-simulation analysis of vehicles entering, stopping, and exiting the station, combined with the delay model theory, the vehicle is given Stop organization optimization and station layout improvement methods, so that vehicles can run in the station more stably, smoothly and safely. Case analysis shows that applying this method to the roadside parking problem, the main and auxiliary bus stations have a significant improvement in operating capacity compared with the conventional tandem double bus stations, and the service level of the main and auxiliary bus stations has been significantly improved.

• 대한교통학회지
• /
• 제33권2호
• /
• pp.204-213
• /
• 2015

지하철 역사 공간 내 보행교통류의 혼잡 상황은 역사의 이용효율을 저해시킨다. 특히 방향별 동선의 미분리로 인한 보행자간 상충은 보행자의 이동저항을 증가시키며 통행시간과 안전사고에 부정적인 영향을 끼치게 된다. 본 연구에서는 미시적 움직임에 기반한 양방향 보행교통류의 통행 특성을 분석하였으며, 동선 분리로 인한 운영상의 효과를 분석하는 모형을 개발하였다. 이산요소법에 따라 역사 공간을 2차원 grid 구조로 해석하였으며, 각 grid에 존재하는 cell 별로 보행자의 움직임이 이루어진다고 보았다. 그 결과 양방향 보행교통류가 상충하는 상황에서는 동선을 분리시키고, 우측통행을 유도하여 보행자들의 진행 방향을 정돈시키는 경우가 가장 효율이 좋은 것으로 분석되었다. 이에, 동선 분리 시스템을 적용하여 보행편의 및 이동성을 증진시키기 위한 시사점을 제시하고자 한다.

• 한국철도학회논문집
• /
• 제19권3호
• /
• pp.388-396
• /
• 2016

서울 수도권 지하철 망은 과거 수십 년 동안 도심지의 인구 분산, 교통 정체 해소 그리고 인접 도시의 활성화 등 다수의 목적을 위하여 여러 번의 진화 과정을 거쳐 왔다. 본 연구에서는 서울 수도권 망의 동적인 진화에 따라 지하철 망의 특성과 망의 효율이 어떻게 변화해 왔는지를 분석하였다. 아울러 본 연구에서는 지하철 망의 효율을 보다 현실적으로 나타낼 수 있는 새로운 척도를 제안하였다. 서울 지하철 망의 효율성은 74%로 외국의 값들보다 높게 나타났으며 승객의 실질적인 흐름을 고려하면 효율성은 85% 이상으로 더 높게 나타났다. 9호선과 신분당선, 의정부선과 에버라인 노선들은 2013년 9월 이후로 수송 실적 관련 자료를 공개하지 않기 때문에 본 연구에서는 분석 범위를 데이터가 존재하는 2008년 9월부터 2013년 9월로 국한하였다.