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RISS 인기검색어
- 검색키워드
- 저자 : Chang-gyun Roh (검색결과 30 건)
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노창섭,최대균,우이형,최부병,Roh Chang-Sup,Choi Dae-Gyun,Woo Yi-Hyung,Choi Boo-Byung 대한치과보철학회 1992 대한치과보철학회지 Vol.30 No.3
This study was performed to investigate the phonetic alterations with upper anterior teeth were missing. To compare the changes of the phonations, before and after insertion of the temporary prosthesis, six subjects who lost their upper anterior teeth were selected (2-male, 4-female). Tested sounds (/ga(가), na(나), da(다), ra(라), sa(사), ja(자), cha(차), ta(타), pa(파), ha(하), gi(기), ni(니), di(디), ri(리), si(시), jl(지), chi(치), ti(티), pi(피), hi(히), seu(스), se(세), so(소), su(수)/were programmed into an IBM AT with and without temporary prosthesis. These experiments were analyzed by formants, consonants durations, and energy level changes with an LSI speech work station program. During the pronunciation of the tested sounds (with and without temporary prosthesis), mandibular movements were recorded to a Mandibular Kinesiogram and analyzed . The findings led to the following conclusions: 1. Objective differences could not be found. However, in every informant, subjective improvement could be noticed. 2. There were no persistant correlations of the formant's changes. And in every informant, phonetic changes were variable. 3. There were various changes of the consonant durations in every informant. By and large, those of /si(시), jl(지), chi(치), Pi(피), hi(히)/ were longer than other tested sounds. After insertion of the prosthesis, durations were shorter. Consonants with /i(ㅣ)/ were longer than with /a(ㅏ)/, with or without prosthesis. 4. With and without temporary prosthesis, mandibular movements were various in the frontal view. Mandibular movements showed lateral deviations, and mandibular positions with /si(시), ji(지), ti(티), seu(스), hi(히)/ were nearer to the mandibular rest position. 5. The kinds of temporary prosthesis and conditions of the missing teeth influenced every informant variously, so there were no correlation between informants. 6. Energy levels increased in all tested sounds with a fixed temporary prosthesis. And, there were no differences between before and after insertion of a removable temporary prosthesis. However, sibilant sounds, and consonants with /i(ㅣ)/ showed a little increased energy level.
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Impact of Heavy Vehicles on Highway Traffic Flows: Case Study in the Seoul Metropolitan Area
Roh, Chang-Gyun,Park, Bum-Jin,Kim, Jonghoon ASCE American Society of Civil Engineers 2017 Journal of transportation engineering.Part A.Syste Vol.143 No.9
<P>Highway capacity manuals (HCM) have incorporated the effect of heavy vehicles (HVs) in the form of passenger car equivalents (PCEs) for estimating highway traffic conditions, which include the road's slopes, the length of the road, the geographical characteristics, and the ratio of HVs to other types of vehicles on the road. The PCEs of HVs are critical for designing, operating, and evaluating highways. In order to analyze the effects of HVs on highway traffic flow, the real-time automatic vehicle classification (AVC) data were collected for three different major highways (four-lane, six-lane, and eight-lane highways, respectively) in the Seoul metropolitan area for the 2 months from August to September 2011. The purpose of this study was to examine the effect of HVs on traffic flows using real-time AVC data and to analyze the relationship among the average speed, the HV ratio, the flow rate, and the number of lanes. The findings revealed that the average speed decreased when the flow rate and HV ratio increased for the six-lane and the eight-lane highways. The average speed also decreased as the flow rate increased for the four-lane highway. However, the average speed stabilized when the HV ratio was in the range of 25-45% and recovered when the HV ratio exceeded 45%; this result implied a need to reexamine the existing methods of deriving the HV factors for the HCM. (C) 2017 American Society of Civil Engineers.</P>
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고령자 보행특성을 고려한 경사보행로 시설한계 연구(고령자 보행변수 실측을 통한 보행시설물 설계기준 정립 2)
노창균(ROH, Chang-Gyun),박범진(PARK, Bum Jin) 대한교통학회 2018 대한교통학회지 Vol.- No.-
전 세계적인 고령화로 인하여 고령자의 사회 ․ 경제 ․ 문화 활동이 증가하고 있다. 기존 연구에 따르면 고령자는 보행 중 신체적 부담을 느끼고 있으며, 특히 연속적인 보행으로 통행해야 하는 경사로 이용에 부담을 느끼고 있다. UN 산하의 World Assembly on Ageing에서 2002년에 발표한 ‘고령화에 관한 마드리드 국제행동계획’에서는 고령자의 능동적 생활을 장려하기 위한 대책으로, 고령 친화적 물리적 환경 조성이 필요함을 강조하고 있다. 이와 같은 측면에서 고령 친화적 경사로 보행을 위한 시설 기준 마련이 필요하다. 이를 위해 본 연구에서는 동작분석시스템을 이용하여 경사각도 기준 3°, 5°, 7° 및 9° 등 4개 유형의 보행로를 대상으로 국내 평균 고령자 신체치수와 유사한 고령자의 보행 및 신체특성을 측정하였다. 그 결과 5°에서 7° 경사로 변화 시 가장 큰 동작 및 신체변수의 변화가 측정되었다. 이를 종합하여 볼 때, 고령자가 안전하고 편안한 보행을 위해서는 7° 미만의 경사로 보행로가 구성되어야 함을 의미한다. 이와 같은 고령자가 평지 보행과 유사한 형태로 보행이 가능한 보행 시설 구성을 통해 고령자의 자립 지원 및 적극적 고령 사회 대비가 가능할 것으로 기대한다. The aging population has increased the variety of activities of the elderly. According to a previous study, older people feel the physical burden of walking. In particular, the slope is under pressure due to continuous walking from start to end point. Madrid’s International Action Plan on Aging published in 2002 by World Assembly on Aging (under UN) highlights the need to create an aged-friendly physical environment. It is expected that the elderly will be able to lead active lives. In this regard, it is necessary to set up facilities standards for aged-friendly ramps. This study used the operation Motion Analysis System to measure the characteristics of elderly walkers and their physical characteristics when walking 3°, 5°, 7° and 9° slopes. The target was for senior citizens who are similar to the average size of the nation’s elderly. As a result, the largest changes in variables were measured at 5° to 7°. Therefore, for the elderly to safely and comfortably walk, the slope should be less than 7°. It is necessary to construct a pedestrian facility where an elderly person can walk in a similar form to a flat-land walk. It is expected that this will help the elderly to support their independence and prepare for an aged society.
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영상정합 기술을 활용한 터널관리시스템의 운영 효율성 제고를 위한 콘텐츠 연구
노창균(Chang-gyun Roh),박범진(Bum-Jin Park),김지수(Jisoo Kim) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.6
한국은 산지가 많은 지형적인 특징으로 터널이 많고, 지형적 특성 극복을 위해 터널의 길이도 점차 장대화되고 있는 중이다. 사고 감소를 위한 노력에도 불구하고 터널내 사고는 지속적으로 증가하고 있어 터널관리시 현 터널관리 콘텐츠의 문제점 및 개선에 대한 필요성이 대두되고 있다. 터널관리시스템은 전통적으로 방재기능 중심으로 운영되고 있어 터널관리자들이 섬세한 교통류를 관리하기 위한 콘텐츠들은 대부분을 CCTV영상에 의존하는 경향이 크다. 이에 본 논문은 IPA 기법을 활용하여 현재의 터널관리시스템 콘텐츠를 조사하여, 중요도는 높으나 만족도는 상대적으로 낮은 중점개선 콘텐츠(돌발상황 관리 지원, 돌발상황 2차사고 관리 지원, 교통류의 모니터링)를 도출하였다. 또한 이들 콘텐츠의 만족도가 떨어지는 이유를 터널관리자를 대상으로 설문조사하여 직관적 이해가 떨어지는 CCTV영상을 원인으로 판단하였다. 도출된 문제점 극복을 위해 영상정합기술을 활용하여 개별 CCTV를 평면화하여 위에서 아래로 내려다 보이는 새로운 영상을 제공하기 위한 시스템을 개발하고, 이를 테스트하여 콘텐츠 개선 전략을 수립하였다. 신규 콘텐츠는 터널관리자를 대상으로 만족도 조사를 재시행 하였으며 5점 만점에 4.2점이 도출되었다. 이를 통해 신규 콘텐츠의 활용성을 확인하였으며, 장대터널의 증가 및 해저터널 건설 등이 추진되고 있는 현시점에서 정책적 활용이 기대된다. In South Korea, there are a large number of tunnels because of the mountainous terrain, and to overcome this characteristics, lengths of tunnels are more longer than existing tunnels. The need to improvement current tunnel management contents is giving rise for accidents in tunnel section is continuously increased although lots of efforts to reduce the accidents. Conventionally, disaster prevention have been focused on the Tunnel Management Systems, tunnel operators generally tend to depend on CCTV images for most contents of detailed traffic flow managing. In this paper, investigation about current Tunnel Management Systems contents using IPA survey was conducted, and Priority Improvement Contents(Accident Situation Management Support, 2nd Accident Management Support, Traffic Flow Monitoring), which importance are high, but satisfaction are low, are deducted. Also, CCTV images, lack intuitive understanding, are judged as a main cause of low satisfaction of those contents. To overcome those limitations of the existing Tunnel Management Systems, this study sought to develop a technology for the synthesis of road images to derive traffic information from synthesis images, and the contents improvement stragegy is established. Tunnel operators-oriented satisfaction survey on new contents was carried out, and scored 4.2 on a 5-point scale. This has confirmed that the availability of new contents and at this stage, with pushing ahead of long-tunnels and undersea tunnels construction, politic applications are expected.
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