• 한국도로학회논문집
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• 제8권2호
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• pp.75-85
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• 2006

현재 우리나라 2차로도로 횡단면 설계기준은 설계속도별 최소 차로폭과 길어깨 기준은 있으나, 다양한 횡단면 구성안이 없어 전국이 획일적인 도로구조 형태를 보이고 있다. 따라서 본 연구에서는 2차로도로의 사고유형별 원인을 규명하고 그에 따른 교통운영 및 안전성 측면에서 횡단면 개선 방안을 수립하고, 평가척도를 선정하였으며, 평가과정을 통해 새로운 횡단면 설계기준을 제시하고 이를 검증하였다. 연구결과 같은 2차로도 도로폭 $9{\sim}12.9m$ 보다 $6{\sim}8.9m$ 도로가 사고율이 매우 높은 것으로 나타났으며, 대표적 사고유형들의 개선점은 차로 및 길어깨 확장으로 나타났다. 시뮬레이션 결과 도로폭 6$\sim$7m 는 교통량 1,000vph에서 급격한 지체 시간 상승을 보이고 있으나. 도로폭 10$\sim$11.5m도로는 1.200vph에서 약간의 변화를 보였다. 이 결과(pcu/일)를 국도와 지방도 일평균교통량(대/일)분포와 비교분석 하여 다양한 횡단면 기준을 제시하였다.

• 한국항해학회지
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• 제21권2호
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• pp.19-40
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• 1997

When designing new marine traffic routes, it is desirable that the congestion due to traffic volume is evaluated by theoretical traffic capacity or by traffic simulation. Most of these techniques are applied to single server which is not considered channel width. Over-taking or paralle sailing of two or more vessels is allowalbe in Dover, Uraga, Gaduk-sudo, etc under their traffic capacity. In this paper, the Bumper Model is introduced to multiple severs in narrow channel and applied to Uraga Channel in Japan. The minimum width of Uraga Channel is 1, 400 m and its design traffic capacity is evaluated 19.26 ~ 19.52% of the basic traffic capacity. The traffic capacity on Gaduk Channel according to Busan New Port Development in 2011 will be estimated 3.59 % of maximum density and equal to 18.6% of that on Uraga Channel in 1992. The channel width Gaduk-sudo is designed 1, 600~2, 460 m and evaluated safe enough.

• 전기학회논문지
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• 제67권2호
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• pp.301-307
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• 2018

Unmanned Aerial Vehicles (i.e., drone) are gaining a lot of interest from a wide range of application domains such as infrastructure monitoring and parcel delivery service. In those service scenarios, multiple UAVs are involved and should be reliably operated by so-called UAV management system. For that, we propose oneM2M standard based UAV management and control system which is specifically targeted at traffic management of low-altitude UAVs. In this paper, we include oneM2M platform architecture and its implementation for UAV management system in conjunction with UAV interworking procedure.

• 환경위생공학
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• 제14권2호
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• pp.68-74
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• 1999

The atmospheric concentrations of Nitrogen Dioxide ($NO_2$) and Total Suspended Particulates (TSP) at the traffic road side were measured n Asan area, Choongchumg-namdo during May 1998 and January, 1999.The results of the study are as follows;1. The aversge value of airbone $NO_2$ and TSP levels were 28.5ppb and 5.9mg/me in Asan area. 2. The concentration distribution of NO2 and TSP is high for the season of winter. On a daily pattern, somewhat high value is appeared in the afternoon. 3. For the station, terminal, and Shinchang, the average value of $NO_2$ is 33.6ppb, 27.9ppb and 24.1ppb in sequence, and the ones of TSP is 6.3mg/m3, 6.0mg/m3 and 5.3mg/m3 in order.4. The high levels of $NO_2$ and TSP were positively related to traffic volume.

• 한국대기환경학회지
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• 제16권1호
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• pp.37-47
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• 2000

The Urban thermal environment is influenced and modified in many ways. One modification is brought by the anthropogenic heat generation emitted from the combustion processes and the use of energy such as industrial, domestic and traffic procedure. The anthropogenic heat generation affect an the increase of urban temperature, the well-known urban heat islands. The study on the urban thermal environment needs a great deal of the statistic data about the inner-structure of urban, the contribution of different constructions and the traffic amount on urban thermal environment in finite region. In order to overtake a quantitative analysis of effect of the anthropogenic heat, a distribution map of the urban anthropogenic heat was made using hte data of the energy consumption used at the several constructions and traffic amount of vehicles in Pusan Metropolitan. Annual mean heat flux over the 4$\textrm{km}^2$ urbanized area in Pusan is 41.5W/$m^2$, ranging from 31.4W/$m^2$ in summertime to 59.5W/$m^2$ in wintertime and maximum diurnal anthropogenic heat generation is corresponding to 10% of irradiance during summertime.

• 대한교통학회지
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• 제30권5호
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• pp.23-31
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• 2012

이 연구의 목적은 보행자 서비스 수준을 고려한 보행 교통섬의 설계기준을 개발하는데 있다. 이를 위해 이 연구에서는 시뮬레이션 분석을 통해 일정 보행자 서비스 수준 C와 D를 유지할 수 있는 교통섬의 최소 설계 면적과 교차로 기하구조(편도 2차로)를 반영한 임계 보행 교통량을 제시하는데 중점을 두고 있다. 주요 결과는 다음과 같다. 첫째, 보행 서비스 수준 C와 D를 만족하고, 신호주기별 보행 교통량에 따른 총 160개 교통섬의 면적이 VISSIM을 통해 도출된다. 보행 서비스 수준 및 보행 교통량에 따른 교통섬의 면적은 최소 $3.0m^2$에서 최대 $41.0m^2$인 것으로 분석된다. 둘째, 교통섬 운영의 임계 보행 교통량은 편도 2차로와 120-150초 신호주기를 기준으로 서비스수준 C에서 1,000-1,300인/시, 그리고 D에서 1,600-1,800인/시인 것으로 평가된다.

• 대한교통학회지
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• 제26권6호
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• pp.81-89
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• 2008

도시고속도로의 확대와 더불어 일반 간선도로에 접속되는 도시고속도로 진출램프 또한 증가하고 있으며, 진출램프가 혼잡한 간선도로 상에 접속시 간선도로에서의 차량 혼입으로 인한 혼잡 가중 및 이로 인한 진출램프에서의 대기행렬이 역류하여 도시고속도로 본선에 혼잡의 영향이 미치는 현상이 발생하고 있다. 이러한 문제를 해결하고자 본 연구에서는 도시고속도로 진출부 교차로 제어의 개념으로 접근하여 도시고속도로 진출차량을 포함한 간선도로에서의 교통상황(하류부 링크 포함)까지도 고려하여 간선도로가 포화된 경우, 진출램프가 포화된 경우, 간선도로와 진출램프 모두 포화된 경우로 나누어 각 교통상황별 제어전략의 효과를 분석하였으며, 제어전략의 효과에 영향을 미치는 기하조건을 반영하기 위하여 COSMOS에서 제시한 하류부 링크저장공간 200m를 기준으로 이상일 때와 이하일 때로 구분하여 전체 6가지 CASE에 대한 감응식 신호제어전략 적용 전 후의 효과를 평가하였다. 그 결과, 전체 네트워크 차원에서 하류부링크 저장공간 200m 이하일 때 CASE I${\sim}$III에서는 4.4%${\sim}$6.2%, 200m 이상일 때 CASE Ⅳ${\sim}$Ⅵ에서는 6.1%${\sim}$16.2%의 지체 감소 효과가 발생하였으며, 상대적으로 하류부 링크저장공간이 큰 네트워크에서 효과가 더욱 크게 발생한 것으로 분석되었다.

• Journal of Preventive Medicine and Public Health
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• 제23권1호
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• pp.43-56
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• 1990

To evaluate the difference of concentration and mutagenicity of organic pollutants between residential and traffic area of Seoul, air samples were collected in Bulkwang (residential) and Shinchon (traffic) area. Samples were analyzed to measure the concentration of extractable organic matters (EOM) and their subfractions and mutagenicities were tested using Salmonella typhimurium TA 98. The concentrations of polycyclic aromatic hydrocarbons (PAHs) were also measured by gas-chromatography and compared between two areas. The results were as follows ; 1. While the concentration of total suspended particulate (TSP) in residential area was below the environmental standard in annual average, the concentration in traffic area was above the standard and was up to its maximum $256{\mu}g/m^3$ in November. The difference of TSP concentrations in both areas of each month was statistically significant (P<0.05). 2. The concentration of fine particle in traffic area was significantly higher compare to that in residential area and showed statistically significant monthly difference in both areas (P<0.05). The proportion of concentration of fine particle to TSP was 55-68%. 3. Mean concentrations of EOM in residential and traffic areas were $4.3{\mu}g/m^3\;and\;5.3{\mu}g/m^3$ respectively. The proportion of amount of EOM from fine particle to EOM from TSP was 70-88%. 4. While the percentage of polar neutral organic compounds (POCN) of fine particle in Bulkwang's sample was higher compare to Shinchon's sample, the percentage of aliphatic compounds of fine particle in Shinchon's sample was higher compare to Bulkwang's sample. The percentages of PAH fraction were as low as 6-10% in both areas. 5. The mutagenic activity of nit concentration of organic matters extracted from fine particle was higher compare to that of coarse particle and was increased when metabolically activated with S9. Mutagenicities with metabolic activation calculated by unit air volume were significantly different between residential and traffic area, $17\;revertants/m^3$\;and\;22\;revertants/m^3$ respectively. 6. The concentrations of benzo(a)pyrene in fine particle of traffic and residential areas were $3.10ng/m^3\;and\;2.02ng/m^3$ respectively. Sixteen PAHs were higher in samples of traffic area compare to residential area and also concentrations of PAHs in fine particle were higher compare to coarse particle.

• 한국항해항만학회지
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• 제45권6호
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• pp.306-313
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• 2021

국가어항은 어선의 피항지로 운영되고 있고, 항구의 식별 및 통항선박의 안전 등을 고려하여 기능시설인 방파제등대가 설치되어 있다. 본 연구에서는 전국 105개 국가어항의 통항량을 기반으로 방파제등대(234기) 서비스수준을 추정하였다. 이를 위해 평가항목의 결정, 기준지수 산정(Fs=1), 근접항 식별, 방파제등대의 기능(서비스수준) 추정 순으로 진행하였다. 하지만 국가어항은 어항의 규모, 통항량, 어선 수용능력 등이 상이하였다. 따라서 105개의 국가어항은 군집분석을 통해 3개의 그룹으로 나누었다. 군집분석은 방파제등대의 서비스수준 요소인 제적어선 척수, 어선톤수, 연간 입출항척수, 어선 수용능력 등을 기준으로 하였다. 추정결과 방파제등대의 서비스수준(등탑의 높이, 등고, 광달거리, 등고)은 그룹1이 10.50m, 16.50m, 7.00mile, 5.5sec이고, 그룹2가 10.67m, 16.16m, 8.33mile, 6.0sec이며, 그룹3이 11.53m, 16.75m, 6.75mile, 5.0sec이다. 이러한 연구결과는 차후 어항에 방파제등대를 신설할 경우 통항선박의 서비스수준 향상을 위한 기초자료로 활용될 수 있을 것이다.

• 한국도로학회논문집
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• 제19권5호
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• pp.163-171
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• 2017

PURPOSES : Traffic safety facilities are used to prevent traffic accidents before they occur by providing drivers with information on traffic situations and the geometric design of roads. However, some facilities not defined in guidelines do not meet installation criteria, yet are being installed and used in order to increase efficiency in traffic flow and prevent traffic accidents in a specific expressway zone. In this study, we have evaluated the effect of delineation system which are not defined in the guideline criteria. METHODS : Different virtual scenarios were created for roads using expressway median barrier chevron signs, with a driving simulator used to evaluate the installation and operational effect of such signs. Ten experiments were performed with left- and right-curved roads at curve radius intervals of 500 m, from 500 m to 2,500 m. RESULTS : For sections with a curve radius of more than 1,500 m, drivers had a clear tendency toward stable driving regardless of delineation system. When a chevron sign is installed on a protection fence in the road curving left, an expanded installation is recommended up to the section with a curve radius of 1,000 m. According to the analysis results for the RHB (Relative High Beta spectrum), driving concentration also improved up to a curve radius of 1,000 m. CONCLUSIONS :The experiment result indicates the extent of biasing within a lane and the manipulation amount of steering handle, were analyzed and found to be affected by curve radius and road alignment regardless of delineation system.