• Proceedings of the Korea Contents Association Conference
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• 2016.05a
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• pp.135-136
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• 2016

스마트 폰이 많이 보급되고 인터넷과 네트워크의 기술이 발달 하면서 많은 서비스 앱들이 개발되고 있다. 현재 스마트 폰은 컴퓨터를 대체할 정도의 수준으로 발전하고 있으며 기존의 컴퓨터로만 수행할 수 있는 서비스들도 스마트 폰을 통해 제공할 수 있도록 확장되고 있다. 본 논문에서는 위치기반의 스마트 택시 매칭 서비스 및 시스템 기법을 제안한다. 특히, 기사용 앱과 고객용 앱을 설계하고 스마트 폰이 보유한 고유 MAC 주소를 Key로 활용하고 사용자의 실시간 위치 좌표를 이용하여 고객과 기사의 매칭이 이루어지는 콜택시 서비스 시스템 구축 방법을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.106-109
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• 2017

본 논문은 미래의 무인택시 이용의 편리성을 위한 무인택시 매칭 플랫폼을 제안한다. 제안한 무인택시 매칭 플랫폼은 무인택시를 아두이노 RC카로 대체하고 무선통신를 활용하여 사용자와 무인택시의 매칭 시스템을 제어한다. 이를 위해서 무인택시 호출 어플리케이션과 관리 DB를 구축하였다.

• The Journal of Information Systems
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• v.17 no.1
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• pp.131-153
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• 2008

So many location based service systems, including automobile navigation system logistic management, taxi fleet management, and so on, are being used everywhere. However, these are all outdoors. This paper provides a stepping stone for commercial indoor location based services by developing an integrated system of our indoor positioning and map viewer modules. For the indoor positioning, we propose WLAN (Wireless Local Area Network) based EKF (Extended Kalman Filter) which estimates user's current location and tracts user's trace in the sequence of time. Our map viewer renders a map recorded in an Autocad DXF file and provides functions of map manipulation such as zoom-in, zoom-out, and move. We integrate our indoor positioning and map viewer modules and discuss the experimental results of the integrated system.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.275-279
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• 2008

본 논문은 제주 택시 텔레매틱스 사업의 운영 결과 축적된 히스토리 정보를 기반으로 택시들의 운행기록을 분석하여 승객들이 택시를 찾는 지점을 분석하는 기법을 제시하고 이를 바탕으로 시간별 지역별 링크별 승차 패턴을 분석한다. 이를 위하여 택시의 상태도 천이에서 승차지점을 추출하였으며 해당 데이터를 데이터베이스 테이블에 저장하였다. 이후 승차지점들을 그루핑하여 승차 패턴의 추이를 발견하고 이에 대한 분석을 수행하였다. 이 분석 데이터는 택시들을 지역별 시간대별로 승객이 많이 찾는 위치로 이동시키고 택시의 공차 운행율을 감소시키는 배차 방식을 개발하여 택시의 영업 수익 증대와 승객의 택시 대기시간 감소를 기할 수 있다.

• Korean Journal of Environment and Ecology
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• v.15 no.3
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• pp.224-229
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• 2001

The vascular plants in Chilsan islet were summarized as 84 taxi; 37 families, 74 genus, 71 species, 13 varieties. Evidence from the species distribution such as Cudrania tricuspidata and Mallotus japonicus, this islet belongs to the Southern province in phytogeographical point of view. The dominant species in the studied areas are in the follows; Both Carex boottiana and Artemisia carpillaris are in the Islet I, Carex boottiana for the Island II, Both Carex boottiuna and Mallotus japonicus fur the Island III. Clerodendron trichotomum for the Island IV. Both Miscanthus sinensis and Imperate cylindrie var. koenigii for the Island Ⅵ, respectively.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.132-133
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• 2014

최근 범죄 예방에 대한 관심도가 높아져 가고 있고, 이러한 요구사항을 수용한 다양한 모바일 앱이 제시되고 있다. 본 논문은 택시 범죄를 예방하고 승객의 안전 관리를 위한 모바일 앱의 설계를 제안한다. 제안하는 모바일 앱은 비전기반 증강현실을 이용하여 택시 번호판 조회 기능을 제공하고 GPS 위치 정보를 활용하여 길 안내 및 예상 경로 안내 서비스를 제공한다. 이를 통해 승객의 안정성과 편의성을 증대하도록 한다.

• Journal of Positioning, Navigation, and Timing
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• v.11 no.4
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• pp.389-395
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• 2022

In order to ensure reliability the high-level automated driving such as Advanced Driver Assistance System (ADAS) and universal robot taxi provided by autonomous driving systems, the operation with high integrity must be generated within the defined Operation Design Domain (ODD). For this, the position and posture accuracy requirements of autonomous driving systems based on the safety driving requirements for autonomous vehicles and domestic road geometry standard are necessarily demanded. This paper presents localization requirements for safe road driving of autonomous ground vehicles based on the requirements of the positioning system installed on autonomous vehicle systems, the domestic road geometry standard and the dimensions of the vehicle to be designed. Based on this, 4 Protection Levels (PLs) such as longitudinal, lateral, vertical PLs, and attitude PL are calculated. The calculated results reveal that the PLs are more strict to urban roads than highways. The defined requirements can be used as a basis for guaranteeing the minimum reliability of the designed autonomous driving system on roads.

• Journal of Positioning, Navigation, and Timing
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• v.11 no.2
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• pp.99-107
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• 2022

Urban Air Mobility (UAM) such as a drone taxi is one of the future transportations that have recently been attracting attention. Along with the construction of an urban terminal, an accurate landing system for UAM is also essential. However, in urban environments, reliable Global Navigation Satellite Systems (GNSS) signals cannot be received due to obstacles such as high-rise buildings which causes multipath and non-line of sight signal. Thus, the positioning result in urban environments from the GNSS signal is unreliable. Consequently, we propose the Ultra-Wideband (UWB) network to assist the soft landing of UAM on a vertiport. Since the positioning performance of UWB network depends on the layout of UWB anchors, it is necessary to optimize the layout of UWB anchors. In this paper, we propose a two-steps genetic algorithm that consists of binary genetic algorithm involved multi objectives fitness function and integer genetic algorithm involved robust solution searching fitness function in order to optimize taking into account Fresnel hole effects.

• Journal of Multimedia Information System
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• v.9 no.3
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• pp.227-232
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• 2022

Disasters are now becoming commonplace and especially the vulnerable group such as the disabled, the elderly, children and foreigners are in a state of overlapping disasters. In this situation, ATSC 3.0-based UHDTV disaster information service for the visually and hearing impaired has been developing. This study focuses on the demand data collected through in-depth interview with the impaired. The demand analysis data is very important to development process of technology. The results of the interview show that it is essential to link the UHDTV disaster signals with home-network, IoT, wearable devices, and various assistive devices for the impaired (hearing aid, smart light bulbs, warning light, etc.). In outdoor space, UHDTV disaster information must be connected to public display media, digital signage, kiosk, screens in bus or taxi. If communication aids for the visually and hearing impaired are equipped with a function that can transmit and receive disaster information, it will help to minimize disaster damage.

• Journal of the Korean Society of Industry Convergence
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• v.26 no.4_1
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• pp.537-543
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• 2023

According to the statistics, Korea is expected to reach a super-aged society in 2025. In preparation for an aging society, The government is making efforts to improve in social activity and welfare for the elderly people. But in case of people who live in urban-rural mixed cities, They can not benefit from traffic convenience that is essential in social activities. For example, surveys and interviews show that, The dwellers(65+ of some urban-rural mixed cities) have many restrictions on social activities because of mobility disadvantage. Therefore, We propose that expansion for the people who need to use the voucher taxi, Increase of the public bus service and rebuilding of the bus stop terminal. We are looking forward to this study will be used as basic data for transportation policy of urban-rural mixed cities across the country.