• 한국인터넷방송통신학회논문지
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• 제24권4호
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• pp.183-188
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• 2024

시대가 흐르고 기술이 발전함에 따라 과거에 비해 많은 교통수단들이 생겨났다. 사람들은 자가용뿐만이 아니라 지하철과 버스 그리고 택시와 같은 다양한 교통수단을 사용하고 있는데, 그 중에서도 대중교통은 남녀노소 상관없이 사용되는 교통수단이다. 대중교통은 적은 비용으로 편하게 이용할 수 있다는 장점이 있으나 과거에 비해 인구수가 증가함에 따라 교통체증도 점점 증가해 불편한 요소가 늘어가고 있다. 특히 특정 시간대나 특정 날짜의 경우 평소보다 배는 교통체증이 심각해진다. 그런 대중교통 중 가장 높은 비율로 활용되는 수단이 지하철이다. 그러므로 이번 연구에서는 R 프로그램을 통해 지하철의 구간별 혼잡도와 그 원인에 대해 분석하고 대책방안에 대해 논의해보기로 한다.

• 제어로봇시스템학회논문지
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• 제13권3호
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• pp.263-267
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• 2007

This study proposes a new methodology to estimate the traffic capacity of a personal rapid transit(PRT) system. The proposed method comprises three steps. The first step models the guideway network(GN) of PRT as a digraph, where its node and link represent a station and a one-way guideway link between two stations, respectively. Given local vehicle control strategies, the second step formulates the local traffic capacities through the nodes and links of the GN model. The third step estimates the worst-case local traffic demands based on a shortest-path routing algorithm and an empty vehicle allocation algorithm. By comparing the traffic estimates to the local traffic capacities, we can determine the feasibility of the given GN in traffic capacity.

• International Journal of Railway
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• 제1권3호
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• pp.117-121
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• 2008

The personal rapid transit (PRT) system is a small scale transportation system that employs a novel concept to solve the traffic congestion problem in the city area. The PRT system is a driverless on-demand system that a passenger calls a vehicle rather than waits for the vehicle. Therefore, one of the most important issues in the PRT system is how to control the vehicle with the satisfaction of the basic concept of the PRT system. In this paper a computer simulator is introduced to evaluate the vehicle. operational control algorithm of the PRT system. The. computer simulator has the commercial embedded processor boards that operate in the real time operating system and pre-designed vehicle control algorithm is coded into the processor boards. The experimental results present the effectiveness of the proposed evaluation apparatus.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2019년도 제59차 동계학술대회논문집 27권1호
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• pp.435-436
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• 2019

무선 인터넷은 무선 데이터 통신망을 이용하여 데이터 통신 및 인터넷 서비스를 이용하는 것을 말한다. 무선 통신 기술의 비약적인 발전은 다양한 단말기를 통해서 무선 인터넷 접속을 가능하게 하고있으며, 공간의 제약을 받지 않고 이기종의 단말기 간 통신까지 가능해지고 있다. 본 논문에서는 PC(Personal Computer)와 스마트폰 간의 무선통신을 통한 PC 원격제어가 가능한 모바일 기반의 리모콘 프로그램을 제안한다.

• 한국기계가공학회지
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• 제21권5호
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• pp.53-60
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• 2022

In this study, the conceptual design and performance evaluation of a personal air vehicle (PAV) is presented, which is a potential futuristic individual transportation. The blade element theory (BET) is employed to compute a rotational velocity. A computational fluid dynamics (CFD) simulation is performed to investigate the difference in the thrust performance in the rotor axis distance of a quad-copter PAV in hovering. Modal analysis is performed to create a Campbell diagram to investigate critical speed. Consequently, a quad-copter PAV changes the aerodynamics thrust and critical velocity according to the rotor axis distance.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 춘계학술발표회
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• pp.77-87
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• 2003

This paper describes recently developed PC based Aids to Navigation Training Simulator (AtoN-TS) using Virtual Reality Modeling language (VRML). The purpose of AtoN-TS is to train entry-level cadets to reduce the amount of sea-time training. The practical application procedure of VR technology to implement AtoN-TS is represented. The construction method of virtual waterway world, according to the guidelines of International Association of Lighthouse Authorities (IALA) is proposed. Design concepts and simulation experiments are also discussed. Results from trial tests and evaluations by subject assessment, provide practical insight on the importance of AtoN-TS.

• 대한교통학회지
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• 제17권3호
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• pp.7-20
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• 1999

차량의 정확한 위치를 자동적으로 파악하여, 차량위치정보를 필요로 하는 사용자에게 한눈에 파악할 수 있도록 지도정보와 합성하여 제공하는 차량위치파악 시스템에 관한 연구가 다양한 방법으로 발전되어져 왔다. 인터넷과 무선통신의 급속한 기술발전과 편리한 사용성, 경제성을 고려해 볼 때, 인터넷과 무선통신을 연결시킨 차량위치파악 시스템의 발전가능성 및 확장성이 클 것으로 생각된다. 이에 따라 실질적으로 기반 구축이 되어있는 현재 수준의 인터넷과 무선통신을 위성항법과 연결하여 차량위치파악 시스템을 실제로 구축해보고, 현재 제기되는 문제점들과 실시간 차량위치파악시스템을 위해 앞으로 더 개발/발전되어져야 할 기술들을 제시한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1757-1764
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• 2004

It is the urgent task of induce the inhabitants to utilize the public transportation instead of the personal transportation to dissolve the traffic jam. But construction of the subway, the representative substitute means, demands a great of investment expense including various kinds of expenses. So the technical development and research of standardization of FRT(Fuel cell Rubber tired Train), the eco-friendly public transportation system low in construction expenses, effective, excellent in approach as well as in traffic, are propelled positively. This project wants to propose exterior design FRT in which original creative methods are utilized with the target of development and construction of FRT which coincide with anthropocentric eco-friendly traffic system. Utilizing the proposed style as the basic materials, this project wants to grasp difficulties, and to establish the way to solve and develop them.

• 대한안전경영과학회지
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• 제12권3호
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• pp.315-320
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• 2010

Recently, there are environmental issues for sustainable transportation system to pursue the energy-efficient and environment-friendly public urban transit. These transportation system needs to offer demand-oriented high-quality service being on the same level with cab service for urban space. PRT(Personal Rapid Transit), small track-guided vehicle, is repeatedly mentioned as a possible alternative for the new urban public transportion system, but but there are not many researches on the operational optimal routing for PRT network. In this paper, the concept of PRT and general optimal routing methods are reviewed. And we suggest the optimal routing method for city-wide PRT network with multi-vehicles and stations, junctions and directional arcs. Futher research directions for PRT routing are presented.

• 환경영향평가
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• 제21권2호
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• pp.255-264
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• 2012

The present study attempts to understand the emission pattern of greenhouse gases in people's daily life through the estimation and analysis of the amount and characteristics of the greenhouse gases. Based on the survey of 1,000 people throughout the nation, monthly emission of greenhouse gases per-capita was estimated from their use of fuels, electricity, water, and personal and public transportation means in addition to their waste generation. In the case of personal car drivers, greenhouse gas emission was the greatest from their cars, followed by the emission from electricity, fuels, and public transportation. Emission from water consumption and waste generation was relatively low. Fuel consumption varied depending on the number of household members, their housing type, and the size of their living spaces. Results showed that single-person households emitted the largest amount of per-capita greenhouse gas while greenhouse gas emission from electricity was inversely proportional to the number of persons in a given household.