• 한국산학기술학회논문지
• /
• 제19권1호
• /
• pp.98-104
• /
• 2018

빛공해의 주택 침입광은 현장에서 여러 환경 요인에 의해 정확한 평가가 쉽지 않다. 그래서, 현장에서의 측정 어려움을 대신하여 빛공해의 영향을 파악하기 위하여 시뮬레이션 프로그램(Relux 등)을 이용하여 분석하였다. 그러나, 침입광에 대한 실제 측정값과 시뮬레이션을 통한 예측값은 여전히 차이점이 존재한다. 본 연구에서는, 옥외조명에 대한 침입광을 조사하기 위하여 서울, 인천 등 측정지점을 선정하였다. 조도 측정은 주택창면 중 연직면 조도가 높을 것으로 예상되는 창문 밖 창면 2지점 이상의 측정지점을 선정하여 측정하였다. Relux 프로그램을 이용하여 예측된 값 중 최대값을 실측값과 비교하였다. 그 결과, 침입광 실측값과 예측값의 오차는 -0.97~0.65 lx(최대값[2.08lx]과 최소값[-7.70lx] 제외) 조사되어졌다. 주택창면을 기준으로 도로조명의 설치위치 높이(H), 거리(L), 너비(W)가 가까이 위치될수록 침입광은 높아짐을 알 수 있었다. 상용조명해석 프로그램(Relux)을 사용하여 예측값을 측정하는데 있어서 주변 환경 요인과 측정자의 오차 등으로 인해 실측값과 다소 오차가 발생하였다. 본 연구에서는 측정수가 많지 않아 차후 연구에서 좀 더 많은 데이터를 이용하여 분석할 필요가 있다.

• 한국도로학회논문집
• /
• 제16권2호
• /
• pp.1-9
• /
• 2014

PURPOSES : This study aims to evaluate the performance of interlocking block pavement system for low speed highway. METHODS : Through on-site monitoring, environmental impact assessment of interlocking block pavement such as heat island reduction, traffic safety, noise pollution were evaluated as compared with asphalt pavement. Also the pavement condition and roughness were evaluated according to performance period. RESULTS : Surface temperature of interlocking block pavement was about 7 degree lower than asphalt pavement in midsummer. Compared to asphalt pavement, vehicle speed reduction effect of interlocking block pavement was about 2kph. For low speed driving, the noise pollution was measured at a similar level for both asphalt and interlocking block pavement. After 42month service period, the breakage of block was only 0.24% for the whole surveyed area. IRI of interlock block pavement was estimated within the range of 5~8m/km. CONCLUSIONS : Depending on the performance monitoring results such as heat island reduction, providing traffic safety and keeping a good pavement condition for a long service period, it assures that interlocking block pavement was applicable for low speed road.

• 한국정밀공학회지
• /
• 제23권3호
• /
• pp.125-131
• /
• 2006

Recently air pollution has become an important issue. So, as tile number of vehicles increases, the noise pollution has become one of the most serious social issues nowadays. It is a muffler, which is one of the vehicle components. that has the hugest impact on the noise from the vehicle. And it also has a direct influence on the engine performance. So lately the research is proceeding on tile semi-active muffler which can control the back pressure variably by setting up the exhaust variable valve in the baffle to improve its internal structure. The inner parts of muffler which consist of a baffle, pipes and etc. appear to have the complicated turbulence phenomena by the pulsational wave of an unsteady state in the engine and by the structural characteristics of the inner parts. To analyze these phenomena, it is required to have an analysis of its constant quantity and quality. Therefore this study is to analyze with PIV measurement which can analyze the time and space variables, not with the point measurement method like former multi-point anemometer. It is to suggest proper design variables which need to make internal structure of the muffler improve though comparison between the passive type muffler and the semi-active muffler by fabricating a muffler which can be visualized.

• 국제학술발표논문집
• /
• The 3th International Conference on Construction Engineering and Project Management
• /
• pp.1522-1527
• /
• 2009

Construction project is necessary element for human life to upgrade the quality and convenience. However, due to its contradictory nature to the environment conservation, environmental pollution and damage, deterioration of natural scenery, noise/vibration, water quality pollution, etc. caused in the process of construction greatly affect the environment. The purpose of this study is to propose checklist for environment management can be used in construction phase. For this, we went ahead with the research by studying the existing research related to environment-friendly construction project management both at home and abroad, investigation and analysis of environment-related laws and ordinances, and drawing the checklists for natural environment and living environment at the construction phase. As a result, we were able to compile a checklist for nine items including geological features, animals and plants, use of soil, quality of air, water, and soil, construction wastes, noise, vibration, recreation, and sceneries. The checklist is structured in 4 grades and coded so as to allow it to be developed with the use of computer system in future. We hope that the checklist presented in this study will help lead the managers at the construction phase in construction development sustainable from the perspective of environmental conservation.

• 환경영향평가
• /
• 제27권2호
• /
• pp.105-113
• /
• 2018

소음의 영향권을 파악하기 위해 사용하는 실측/측정망 자료의 한계점, 소음의 전달특성, 장애물들의 영향 등을 보완하기 위해 소음지도 모델링 방법을 최근에 많이 사용하고 있다. 소음지도 모델링 방법은 소음원의 입력, 예측인자의 설정방법, 예측 소음도들의 분석방법에 따라 결과값에 많은 영향을 미친다. 2개 지역에서 공동주택의 노출소음도 산정을 위한 수음점 설정방법과 노출인구 산정을 위한 대표소음도 산정방법에 따라 총 5가지로 나누어 소음 노출인구 산정 결과를 비교 분석하였다. 분석 결과 소음도 구간별 노출인구수를 비교해보니 두 지역 모두 실제와 가장 유사하게 모델링한 기준 방법(Base)과 비교하여 대표소음도를 최고소음도로, 베란다측 노출만을 고려하여 간략화한 방법(M2-1)이 가장 유사한 결과를 나타냈다. 또한, 대표소음도를 최고소음도로, 일정간격 노출로 간략화한 방법(M1-1)은 과대평가, 평균 소음도를 사용한 방법(M1-2, M2-2)은 과소평가될 가능성이 있는 것으로 나타났다.

• 농촌계획
• /
• 제9권2호
• /
• pp.13-17
• /
• 2003

A purpose of this study is to develop practical indexes for improving a village environment in Kyongbuk, Korea. From a questionnaire survey of the public employees (71 persons) who take charge of the environment in Kyongbuk province, the indexes were produced and the contents of questionnaire consisted of preferential and supplementary indexes to apply. The preferential indexes which apply to an agricultural village and a stock raising village are environmental sanitation facilities, a hygienic check of livestock and a purge of livestock shed's surroundings. In case of mountainous village, and natural-ecological village the preferential indexes are habitat reservation for wildlife, poaching prohibition (monitoring for it), and food supplement for livestock. To the traditional-cultural village, prevention of noise pollution, environmental sanitation facilities, and a monitoring or water quality change are the prior indexes in order. For the village near city and the industrial village the preferential indexes are patrol removing of garbage, pollution index planting and monitoring for noise pollution. For a fishing village and a village fronting waterside excess uses of agricultural chemicals, monitoring for a water quality change, and realignment of green house with vinyl and warehouse. In conclusion the research presents the practical and preferential index for residents to improve their environment in accordance with village settings and suggests guidelines for further research.

• 화약ㆍ발파
• /
• 제29권2호
• /
• pp.81-88
• /
• 2011

발파공법 위주의 공사를 진행하다 보면 민원발생의 대부분을 차지하고 있는 발파공해는 소음과 진동이다. 이로 인해 발파설계시 안정성을 가장 우선적으로 고려하며, 그중에서도 수중소음을 제어하기 위한 노력이 필요하다. 본 연구에서는 발파로 인한 공사 작업이 진행될 때 거리와 지발당장약량을 적용하여 수중음압을 예측하고 그 수중음압을 이용하여 얻은 수중음압레벨 예측값의 타당성을 검토해 보기 위해 실제 측정한 지역과 다른 지역에서 검증을 하여 실제 측정값과 예측값을 비교해 보았다.

• International Journal of Internet, Broadcasting and Communication
• /
• 제9권2호
• /
• pp.37-41
• /
• 2017

In the development of means of transportation, human beings who walk, ride or ride carriages are now enjoying the benefits of many means of transportation, including bicycles, airplanes, trains, buses, and cars. In the case of automobiles among various means of transportation, there is an advantage that an individual can conveniently move while possessing it. To solve air polution problems at the same time, eco-friendly automobiles such as low-noise, low-pollution, and high-efficiency automobiles have emerged. However, in the case of eco-friendly vehicleJ, engine noise at low speeds is a noise that is unlike existing vehicles and poses a threat to the safety of pedestrians. In this study, virtual engine system has been developed to prevent engine accidents caused by low- The pedestrians are aware of the fact that the vehicle is approaching.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2005년도 동계학술발표대회 논문집
• /
• pp.500-505
• /
• 2005

This paper introduces an experimental study for the noise characteristics and reduction of a ventilating fan system. For the purpose of noise reduction of it, an absorptive duct silencer filled with a glass fiber has been conventionally utilized. However, a glass fiber has some disadvantages like hygiene and secondary pollution problems. In order to overcome these problems, in this paper, a perforated duct silencer has been applied to the ventilating fan system. For the designing of a perforated duct silencer, the transmission losses for various perforated panel systems are measured and compared with their sound absorption performances.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2003년도 춘계학술대회논문집
• /
• pp.229-233
• /
• 2003

The soundproof barrier used to reduce the traffic and rail noise is usually designed to the point of view of the acoustic performance such as absorption ratio and transmission loss. But, because the surface of soundproof barrier is polluted by the air pollutant or discharge gas of automobiles, so it's surface cleary maintained by the periodic washing with detergent. But in this case the environmental pollution and the working expenses are worried. So, the objective of this study is to develope the soundproof panel with the self-cleaning properties only by raining.