• Journal of Korean Society of Environmental Engineers
• /
• v.34 no.12
• /
• pp.835-839
• /
• 2012

In recent decades, a lot of noise barriers have been installed along paved road in order to reduce the road induced noise, which increases as traffic volume grows. For better range of sight, transparent noise barriers are widely installed despite of reflecting noise. In this study, the effect of surface shape and pattern of noise barriers on the reduction of reflecting noise was analyzed to maximize the noise reduction. According to the number of shape and pattern, it was observed that there were noise reduction effect as of 0.9~1.5 dB(A). It was found that the spatial field where the noise concentrates or disperses changes according to the width of blocks on the barriers as well. It suggests that there might be possibility of surface shape modification to optimize the noise reduction technology.

• Proceedings of the KSEE Conference
• /
• 2006.10a
• /
• pp.167-184
• /
• 2006

There is cattle shed and house structure of a country village in the vicinity of the construction site. that is why the environmental effect evaluation on blasting had been done in advance to prevent any harm to those from the work. As the result, it is impossible to apply to the blasting method, and the Super wedge method, a kind of a rock-splitting method which there is no secondary breaking by a breaker of the methods breaking &excavating rock according to the classification of the blasting method by the ministry of construction & transpotation, applied to decrease noise and vibration, and to the work classification, the extent of noise and vibration measured with the instrument only for noise(SC-310c) and with the instrument only for vibration(BLASTMATE) respectively. A drilling, splitting, collecting, loading works at the closest point(about 10m) is barely possible on the consideration of vibration to the result of measurement, but carefulness needs on moving of equipment. On the case of noise, even drilling, collecting, loading work except splitting at the comparatively close point(about 20m) is difficult. So, the method breaking &excavating rock according to the classification of the blasting method by the ministry of construction & transpotation has to apply in consideration of noise level in accordance with the work processing.

• Explosives and Blasting
• /
• v.30 no.1
• /
• pp.37-51
• /
• 2012

In this case of "Seongnam~Yeoju double-lanes railroad construction", there were safety facilities which were concerned about damages from vibration and noise. In the project design stage, the rock-splitter method was designed to prevent them. The electronic blasting was considered to improve construction speed and economic value as an alternative tunnelling method, complying with the site's vibration criteria(cowhouse : 0.09cm/sec, residence : 0.2cm/sec). In the environment evaluation report of the eDev, tunnel electronic blasting systems, the blasting pollutions can be managed by the electronic blasting method. The results were successfully conducted with high speed construction without any damages to adjacent facilities.

• Proceedings of the KSR Conference
• /
• 2011.10a
• /
• pp.1953-1959
• /
• 2011

Subway stations have a characteristic that the facilities in the ceiling should be checked, replaced and expanded frequently. The new installation of supports (steel anchors) for new facilities and workers moving-around in the ceiling result in the damage in the ceiling finish material and concrete structure which also result in construction cost increase. In addition, the noise, vibration and dust generated during the work harm the station environment. There are civil complaints on these which give difficulty to ceiling works. Accordingly, this study suggests a ceiling frame construction method that considers the convenience, economy and efficiency of ceiling work by improving the support installation method for facilities in ceiling.

• Journal of Environmental Impact Assessment
• /
• v.17 no.6
• /
• pp.381-391
• /
• 2008

The instances of the damage to livestock are increasing with frequent environmental disputes on the noise and vibration. This study analyzed 134 open cases dealing with the environmental disputes on livestock damaged by noise and vibration, and being intervened by National Environmental Dispute Resolution Commission. The environmental disputes on the noise and vibration account for 86% of all the disputes, and cases of the consequent damages to livestock have increased. As shown in the 134 cases, pig is the most lethal livestock attacked by the noise and vibration. During last 10 years, 89% of the noise damages hurting the livestock resulted from the noises pertaining to construction and 58% was due to the noise damages from the road constructions. The noise levels in the range of 70~80 dB(A) and the vibration levels of 70~75 dB(V) caused most of the disputes. The average rate of reimbursement for the livestock damages for the last 10 years was higher than the average rate of reimbursement of the total disputes intervened by National Dispute Resolution Commission.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2005.05b
• /
• pp.659-663
• /
• 2005

본 연구의 목적은 산악지역의 돌발홍수에 대비한 경보발령을 위한 한계유량을 산정하는 것이다. 돌발홍수는 강우-유출관계가 비선형적이어서 기존의 선형 강우-유출 해석이 곤란하므로 비선형적 접근 방법이 필요하다. 본 연구에서는 지형정보체계(GIS : Geographic Information System)를 이용하여 유역의 지형학적 특성인자와 GIUH 및 GCIUH의 매개변수를 산정함으로써, 유역특성자료의 불확실성을 감소시켰다. 이를 경보발령 체제가 기 설치 운영중인 단양군의 천동계곡에 적용하여 그 적합성을 판단하였다. 여기서, 경보발령을 위한 한계유량은 계곡의 수심이 위험수심(dangerous depth)이라고 판단한 0.5m이상이 될 때의 유량으로 정의하였고, 무강우가 30분간 지속되면 초기화 시키는 과정을 거쳤다. 그 결과 기존의 경보발령 체제와 비교하여 시간당 20mm의 강우량에 대해서는 경보를 발령하지 않으므로 기존에 잦은 경보발령에 의한 주민의 소음피해를 줄일수 있었으며, 시간당 100mm의 강우에 대해서는 2-3분 간격으로 경보를 발령하여 주민의 안전을 도모할수 있었다.

• 한국정보통신설비학회:학술대회논문집
• /
• 2007.08a
• /
• pp.310-314
• /
• 2007

우리는 가끔 도로상에 설치되어 있는 맨홀뚜껑이 뒤집혀 있는 것을 보거나, 맨홀뚜껑 이탈로 인한 차량 파손 소식을 접할 수 있다. 맨홀뚜껑은 일반적으로 도로나 보도에 많이 설치되어 있고, 현재 사용중인 KS규격의 맨홀뚜껑은 마모 및 충격 등 여러 가지 복합적 요인으로 인하여 소음이 발생하고, 또한 극히 일부는 도로에서 이탈하여 인적, 물적 피해를 발생시키고 있는 실정이며 이를 방지하기 위해 많은 연구와 제품 등이 만들어 지고 있는 실정이다. 본 연구에서는 KS규격 맨홀뚜껑의 정적 및 동적 특성을 각종 해석프로그램과 진동실험을 통해 분석하였고, 파라미터 해석을 통한 거동의 핵심 요소 등을 확인하였다. 이러한 분석결과는 보다 안전하고 경제적인 맨홀뚜껑을 개발하는데 중요한 기초자료로 활용될 것이라 판단된다.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2002.11a
• /
• pp.112-113
• /
• 2002

주물작업이란 용융된 금속을 미리 준비한 주형에 부어 원하는 형태의 주물을 만드는 금속성형작업으로서, 생산 공정에서 고열을 이용하여 금속을 용해, 주조하는 등의 작업 특성상 부유분진의 발생이 필연적이며, 일산화탄소, 금속 흄, 휘발성 코울타르 피치, 소음 및 진동, 고열, 전리방사선 등의 유해인자로 인한 피해가 극심하다. 특히 분진은 주물의 생산공정 중 용해, 조형, 탈사 및 후처리 등 거의 전 공정에서 발생되며, 결정형 유리규산(SiO$_2$)을 다량 함유하고 있어 인체에 흡입되었을 때, 건강의 악화 및 직업병의 원인으로서 작업 능률을 떨어뜨리는 요인으로 작용하고 있다(Burgess, 1995). (중략)

• Journal of the Korean Professional Engineers Association
• /
• v.33 no.3
• /
• pp.30-34
• /
• 2000

In recent years, disputes are on the increase that noise and vibration by construction equipments and blasting do damage to livestock farming families around construction sites in the construction of a road or a railway. Therefore, the following ways of improvement were presented in solving the existing problems of livestock disputes. $.$ To minimize the damage of livestock farming families by effect assessment of noise and vibration in the region expected to be damaged before the start of construction $.$ To maintain a thorough management system that can reduce noise and vibration during construction work $.$ To apply an adequate measurement method of noise and vibration taking field conditions into consideration

• Proceedings of the Korea Information Processing Society Conference
• /
• 2018.05a
• /
• pp.327-330
• /
• 2018

국내 축산 농가들은 대부분 돼지우리의 구역을 나눈 후 해당 구역별로 30여 마리의 돼지들을 합사하여 사육하고 있다. 따라서 전염성이 강한 호흡기 질병이 발병하게 되면 돼지우리 전체로 확산되어 심각한 피해가 발생하게 된다. 본 논문에서는 돼지우리에서 발생하는 다양한 소음에도 강인한 소리 기반의 호흡기 질병 탐지 시스템을 제안한다. 제안된 시스템은 먼저, 소리 신호에서 스펙트로그램 정보를 추출하고, 이를 CNN을 기반으로 돼지 호흡기 질병에 효과적인 특징 벡터를 생성한다. 마지막으로, 추출된 특징 벡터를 MLP에 적용하여 해당 호흡기 질병을 탐지 및 식별과정을 수행한다. 본 연구의 실험 결과, 다양한 잡음 환경에서도 돼지 호흡기 질병 탐지 및 식별이 가능함을 확인하였다.