• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2010년도 한국컴퓨터종합학술대회논문집 Vol.37 No.1(D)
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• pp.371-374
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• 2010

본 논문은 Vehicular Ad-hoc Network(VANET)환경에서 V2V간의 신뢰적 통신을 지원하기 위해 Safe-Tunneling Zone을 제안한다. 기존의 무선 환경에서는 신뢰적인 경로산출을 위해 ARAN에서 제안된 hop-by-hop 인증을 사용하여 신뢰성은 충족되나 많은 시간과 자원을 소비하는 단점이 있다. 그러나 본 논문에서 제안한 Safe-Tunneling Zone은 송 수신 하고자하는 차량이 각각 신뢰적 에이전트를 선택하고, 선택된 에이전트는 서로의 ID, Rn을 바탕으로 생성된 세션키를 교환함으로서 상호간의 인증을 수행한다. 이와 같이 본 논문에서는 Safe-Tunneling Zone을 통해 기존의 신뢰적 경로 산출 기법보다 수행과정 절차의 간소화, 자원소비 감소, 종단 간의 신뢰적 경로를 통한 데이터의 기밀성 또한 제공 가능하도록 한다.

• 한국도로학회논문집
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• 제17권6호
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• pp.117-126
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• 2015

PURPOSES : This study prioritizes potential technology for establishing a safe work zone environment on roadways. We consider almost all conceivable technologies that enable mitigation of unexpected accidents for both road workers and drivers. METHODS : This study suggests a methodology to set the priority of potential technology for establishing a safe work zone environment by using the analytical hierarchy process (AHP). For this purpose, the AHP structure was first developed. Thereafter, a web-based survey was conducted to collect experts' opinions. Based on the survey results, weights associated with the relevant criteria of the developed structure were estimated. With the consistency index (CI) and consistency ratio (CR), we verified the estimated weights. In addition, a sensitivity analysis was performed to confirm whether the estimated weights were reliable. We finally proposed the priority for potential technology for establishing a safe work zone environment on roadways. RESULTS : In the first level, safety technology has the highest priority, and real-time information delivery for work zone, hazard warning for drivers, and temporal automated operation for traffic facilities were selected in the second level of hierarchy. CONCLUSIONS : The results imply that establishing the priority will be useful to establish a future road map for improving the work environment for road workers and drivers by employing appropriate protection facilities and developing safety systems.

• Restorative Dentistry and Endodontics
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• 제29권5호
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• pp.446-453
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• 2004

하악 대구치 근심치근의 danger zone에서 수종의 전동 니켈-티타늄 파일의 근관성형력을 근관성형 전후 치질 두께의 변화를 측정하여 평가하고자 하였다. 기구에 따라 총 40개의 하악 대구치를 10개씩 $Profile^{\circledR}$, GT Rotary file, Quantec 및 ProTaper 4개 군으로 나누고 각 치아당 2개의 근관을 straight up-and-down과 anticurvature 군으로 나누어 근단부 근관을 모두 30번 크기로 일정하게 확대하였다. 수정된 Bramante법을 사용하였으며 술전 및 술후의 근관 상아질 두께를 치수저 하방 1, 3 및 5 mm지점에서 측정, 이원변량분석법으로 통계분석하였다. 모든 군의 danger zone과 safe zone에서의 straight up-and-down 동작과 anticurvature 동작 사이에는 치근상아질 두께변화에 현저한 차이를 나타내지 않았다 (p > 0.05). ProTaper는 danger zone과 safe zone 모두에서 다른 기구에 비해 많은 량의 근관상아질 삭제를 보였으며 특히 분지부 3 mm 수준에서 현저하였다(p < 0.05).

• 한국멀티미디어학회논문지
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• 제22권1호
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• pp.62-69
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• 2019

In this paper, we propose iZone system for safe walking of children. The proposed system recognizes the state that a child is down a roadway as a dangerous situation. And then it informs the surrounding adults and guardians of the child in the event of a dangerous situation. The iZone system consists of the iZone device that attaches to a child's bag or clothing, the iZone app for children, the iZone server, and external beacons. The proposed system uses the ultrasonic sensor of the iZone device and the GPS coordinates and external beacons information by the children's smartphone to determine the dangerous situation. The proposed system uses external beacons to calibrate the GPS coordinates. Moreover, it determines whether the child is down the roadway in sidewalk by measuring the height difference between the roadway and the sidewalk using ultrasonic sensor.

• 공학교육연구
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• 제13권5호
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• pp.20-24
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• 2010

The total number of deaths by traffic accidents is decreasing every year in our country. However, in 2009, children died in traffic accidents at a rate of 2.3 deaths per 100,000 children, which was higher than the average of OECD countries (1.9 deaths per 100,000 children). In particular, traffic accidents are showing rapid increase in school zone during the past 2 years because of problems in the designation and management of school zone. Traffic safety facilities such as road sign, reflector mirror, speed bump have the ultimate limit of vehicle accidents prevention. Thus, in school zone, children safety is still not guaranteed due to illegal parking and the absence of driver's awareness of safety. Therefore, In order to protect children from traffic accidents within school zones, we have realized a safe school zone system, which enables the drivers to better know the intended school zones and creates pedestrian environment through unmanned monitoring camera, using LabVIEW.

• 한국공간구조학회논문집
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• 제13권2호
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• pp.101-109
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• 2013

Children are out future society members but they are not well cared to be safe from various accidents. This is due to facilities were installed upon the children's for adults which can not provide safe traffic environment for children's schooling who are not fare enough experience and matured. "The Rule of declaim for school zone and it's Management"was established in the year 1995 based on the article 11 by the "Road Traffic Low". And 15,136 school zone declared by the above rule. In this study, four elementary schools located in Nowon-gu are selected and analyzed about state of elementary school, scope of school zone, installation of street furniture, and safety signs. The analysis showed that scope of school zone is currently set in 150-meter though the regulation is within 300-meter radius. Therefore, expansion of the scope is required. It is necessary to take control of vehicle during commuting times and holograms which can be noticed in school zone have to be installed as well. Through these improvements, safety zone will be offered to children effectually.

• 자동차안전학회지
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• 제13권3호
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• pp.41-46
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• 2021

The number of big traffic accident cases of pedestrian death appeared to be minor, however compared to death rate in car to car accidents is very high and quite a few of the pedestrian death rates among all traffic accidents are counted to be almost 40%. Previous pedestrian safety studies were mostly aimed at reducing the degree of pedestrian injuries from a vehicle to pedestrian collision, and less at preventing a collision itself. This research was conducted with a method of using road facilities to prevent vehicles from rushing into the sidewalk. This research used one of the collision analyzing programs, called PC-Crash to simulate the vehicle rushing into the sidewalk. Based on the program, it could derive an optimal safe zone location where the pedestrian can wait for the pedestrian light safely. Also, changing road facilities such as pedestrian light pillars or signal controllers can widen 440% compared to the present safe zone. Accordingly, researchers have to consider a method to analyze and apply pedestrian safe zones along with road facilities location when designing a road.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.100-101
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• 2019

For buildings where a large number of the evacuees who are restricted to evacuation behavior compared to normal people, evacuation safety zones should be secured against fire. In order to form a safe haven safety zone, we are going to predict the performance of the building and describe the plan to secure a safe haven zone accordingly.

• 한국ITS학회 논문지
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• 제9권1호
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• pp.55-68
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• 2010

IEEE WAVE는 고속 이동 중인 차량 네트워크에서 운전자 안전 정보 및 상업적 서비스를 제공하기 위한 무선 전송 기술로써 현재 표준화가 활발히 진행 중이다. 본 논문에서는 IEEE WAVE를 기반으로 하는 안전운전 지원 서비스를 위한 응용계층 프로토콜과 이를 기반으로 하는 응용 시스템을 소개한다. 본 논문에서 다루는 안전운전 지원 서비스로는 공사구간 정보 서비스 및 사고차량 신고 서비스, 응급차량 알림 서비스, 프로브 서비스, 딜레마구간 의사결정 지원 서비스를 포함한다. 시스템의 기능 검증을 위하여 에뮬레이터 시스템을 구현하였으며 에뮬레이터는 차량과 도로의 모든 상황을 관리하는 에뮬레이터 서버와 각각의 기능 개체(차량 및 노변, 교통 센터)를 포함하는 클라이언트로 구성된다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2023년도 추계학술발표대회
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• pp.291-292
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• 2023

반려동물을 입양하는 가구수는 매년 증가하고 있고 반려인과 반려동물들의 길거리 치안은 위협받고 있다. 이에 따라 본 논문에서는 반려인이 반려동물과 함께 안전한 외출을 할 수 있도록 '반려동물과 함께하는 안심산책 지도' 애플리케이션을 제안한다. 본 연구의 애플리케이션은 Geofence API를 사용해 안심등급을 산출하여 반려인들과 반려동물을 보다 안전한 환경에 있도록 한다.