• 분석과학
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• 제24권5호
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• pp.368-377
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• 2011

대기오염도와 소음의 연계성을 파악하기 위하여, 서울시 행정구역 중에서 6 개 구에서 각 1 지점씩 6 개 지점을 택하여 조사를 실시하였다. 그리고 세부적인 조사는 도로(road: RD)와 비 도로지점(nonroad: NR)으로 구분한 후 다시 활동 시간대(06:00-22:00)와 비 활동 시간대(22:00-06:00)로 나눈 후 비교 하였다. 소음 주파수 자료와 대기오염물질 농도와의 상관분석을 통하여 양자간의 연관성을 알아보고자 하였다. 시간대별 분석을 통해서는 양자간의 차이를 명확하게 구분하기가 어려웠다. 반면, 공간적 규모를 기준으로 상관분석을 실시한 결과, 전체 시간대에서 도로지역의 소음도와 대기질의 연관성은 비 도로 지역에 비해 높다는 것을 확인하였다. 활동기와 비 활동기로 구분하여 비교한 결과, 도로지역의 경우 활동기에서 비 활동기로 접어들면서 소음도와 대기질의 상관성이 줄어드는 것으로 나타났다.

• 한국정보통신학회논문지
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• 제24권11호
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• pp.1507-1518
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• 2020

고화질 이미지는 정보가 많아 민감한 데이터는 민간기업이나 군사용 암호화에 의해 저장된다. 암호화된 영상은 비밀키를 통해서만 해독이 가능하지만, 일부 픽셀 데이터를 임의의 값으로 덮어쓰는 공유 공격 및 노이즈 공해 공격 기법의 공격을 받아도 원본 데이터는 보존할 수 없다. 중요한 데이터는 공격에 대한 복구 방법에 대한 대책이 더 필요하다는 것이다. 본 논문에서는 난수 발전기 PingPong 256과 셔플링 방법을 제안한다. PingPong 256은 영상이고 영상 암호화는 더 빠르게 수행할 수 있다. 또한 셔플링 방식은 화소를 재조정하여 Shear attack과 Noise pollution attack 기법에 저항하는 것이다. 다음으로 제안한 PingPong256을 SP800-22로 검사하고 다양한 노이즈에 대한 내성을 테스트하고 셔플 링 방식이 적용된 이미지가 Anti-shear attack과 Anti-noise pollution attack을 만족하는지 검증했다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.25-32
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• 2005

In China, environmental noise policies are composed of correlated laws adopted by the Standing Committee of the National People's Congress and promulgated by the President of the country, regulations promulgated by the State Council and/or local government, standards issued by the Standardization Administration Committee (SAC) under the State Council. The laws mainly include the 'Environmental Protection Law' and the 'Law on Prevention and Control of Pollution From Environmental Noise' Regulations are often applied to a special noise pollution phenomenon of wide influence. They are generally only effective in a given area and/or a specific period. Tens of correlated standards specify the noise level limits of different functional zones of land use and of different equipment, machines, devices, appliances etc., and the measurement methods. In this presentation, a brief introduction to these policies and their operations is given and discussed. The conclusion is that the policies supply an effective legislative basis for environmental noise prevention and control in China, but still a lot of work should be conducted and completed to strive for a quiet society.

• 화약ㆍ발파
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• 제11권2호
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• pp.60-68
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• 1993

서울지하철 제1, 2, 3, 4호선의 운행에 따른 소음 및 진동 발생은 인접 주거지역 주민들에게 공해 문제를 야기시켜 각종의 피해를 유발하고 있는 실정이다 그러나 현재 그 피해의 범위를 객관적으로 밝힐 수 있는 자료나지침이 없기 때문에 적절한 대책을 강구할 수가 없다. 따라서 본 조사를 통해 밝혀진 소음자료를 토대로 서울지하철 제1기 지상간의 지하철 차륜 통 과시 방출되는 소음레벨의 거리 별 분포 및 방출특성 그리고 각 노선별 비교 등과, 또 지하철 소음의 평가기준 및 평가방법과 현재 실용 가능한 방지대책을 제시하여 지하철 소음문제의 -반적인 처리지침으로 활용코져 한다. 본 조사 결과 제1호선 및 3호선은 소음레벨이 60dB(A) 미만으로 문제가 없고 소음공해 문제노선은 2호선 및 4호선의 일부 지상노출 구간으로 밝혀졌다. 이들 지역의 피선범위는 2호선의 경우 노선중심에서 50m 이내이고, 4호선의 경우 25m 이내로 이들 지점에서 각각 70dB(A)의 소음도를 기록하고 있다. 그리고 주민의 피해 호소율과 소음도 및 분포거리의 관계는 다음과 같이 밝혀졌다. 즉 80dB(A) 이상에서 강력한 집단민원이 발생하였고, 70-80dB(A)에서 간헐적인 피해호소를 하고 있었으며, 이들 값의 분포범위는 전자의 경우 고가구간에서 25m이내 철교구간에서 12.5m이내 그리고 철교 양구간에서 약 l00m이내이고, 후자의 경우 고가, 옹벽(U-Type) 및 철교구간에서 각각 50m이내이고, 철교량의 경우만 280m이내를 보이고 있다. 상기의 조사결과로부터 서울지하철의 일반적인 소음현황을 파악할 수 있어 지하철소음의 문제점을 개선하는데 필요한 자료로 활용할 수 있을 것으로 사료된다.

• 한국기술사회:학술대회논문집
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• 한국기술사회 1983년도 한일기술사 합동 심포지움
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• pp.74-77
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• 1983

To attain the rich and comfortable human living, much development and economic growth are needed. But the radical development destroys natural environments or resources, and also the life environments are destroyed. How to maintain the balance between development and environments forms an important problem. Since 1955, a great deal of damage has been done to human being by the pollution of air, water or noise in Japan, for example, Minamata-byo (1956), arsenical poisoning by mkil (1955), Cd-I taiitai-byo (1955), asthma by air pollution, etc. Now, there are over 100,000 sick persons suffering from pollution in Japan. To prevent the pollution, the first act was made 1967, the kind of which were defined as follow:air, water, soil, noise, vibration ground subsidence, and bad smell. Laws on these were established 1970∼1981, and the environments here ave gradually being improved. The mentioned above gituation necsesitates the measuring or chemical analysis of pollution data, but the many cost is necessary to obtain such data. The special environment measuring certifier was needed and the Measurement Law was amended 1974. Some comment will be given of the present condition of environmental measuring certifier.

• Asian Journal of Atmospheric Environment
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• 제8권2호
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• pp.81-88
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• 2014

Noise-barriers on both sides of the roadway (hereafter referred to as double noise-barriers), are a common feature along roads in Korea, and these are expected to have important effects on the near-road air pollution dispersion of vehicle emissions. This study evaluated the double noise-barrier impact on near-road air pollution dispersion, using a FLUENT computational fluid dynamics (CFD) model. The realizable k-${\varepsilon}$ model in FLUENT CFD code was used to simulate vehicle air pollutant dispersion, in around 11 cases of double noise-barriers. The simulated concentration profiles and surface concentrations under no barrier cases were compared with the experimental results. The results of the simulated flows show the following three regimes in this study: isolated roughness (H/W=0.05), wake interface (H/W=0.1), and skimming flow (H/W>0.15). The results also show that the normalized average concentrations at surface (z=1 m) between the barriers increase with increasing double noise-barrier height; however, normalized average concentrations at the top position between the barriers decrease with increasing barrier height. It was found that the double noise-barrier decreases normalized average concentrations of leeward positions, ranging from 0.8 (H/W=0.1, wake interface) to 0.1 (H/W=0.5, skimming flow) times lower than that of the no barrier case, at 10 x/h downwind position; and ranging from 1.0 (H/W=0.1) to 0.4 (H/W=0.5) times lower than that of the no barrier case, at 60 x/h downwind position.

• Environmental Analysis Health and Toxicology
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• 제14권4호
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• pp.165-174
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• 1999

This study was conducted to analyze the priority of environmental problems in Korea by investigating the environmental professionals' perception. The delphi technique was applied to identify their risk perception towards some specific items related with pollution. A standardized questionnaire on environmental problems and their priorities was used to 74 subjects. In the questionnaire, the environmental problems were divided into the general ones,9 items, and the specific ones,30 items. Also, the perception was associated with two points of view which were the risk on general human health or ecosystem, and on the present situation in Korea. The priority of risk from general environmental problems on human health or ecosystem was analyzed in the order of 'water pollution', 'air pollution', 'soil contamination', 'waste', 'toxic chemical pollutants', 'food contamination', 'ocean contamination', 'odor pollution', and 'noise pollution'. The priority of risk on the present situation in Korea was analyzed in the order of 'water pollution','air pollution','waste','toxic chemical pollutants','food contamination','soil contamination','ocean contamination','odor pollution', and 'noise pollution'. And these priorities were significantly related with the characteristics of respondents such as sex, age, and major concerned area. However, for the first five priorities of risk from the specific environmental problems on human health or ecosystem, the environmental professionals agreed with 'automotive vehicle exhaust', 'domestic and industrial source pollutants to surface water', '$CO_2$nd g1oba1 warming effect','toxic air pollutant' and 'industrial source air pollution'. The priorities of risk on the present situation in Korea were similar to these results.

• 한국도로학회논문집
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• 제18권2호
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• pp.103-110
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• 2016

PURPOSES: In this paper, the effectiveness of speed-maintained standardization in road geometry on environmental impact at a downward slope location, based on greenhouse gas (GHG) emission indicators, was studied. Specifically, the aim of this study was to ascertain whether speed-maintained standardization resulted in decreased $CO_2$ emissions as well as noise pollution, due to reduced vehicle speeds. METHODS : In this study, speed-maintained standardization in road geometry was proposed as a means to reduce vehicle speeds, with a view to reducing $CO_2$ emissions and noise pollution. This technique was applied at a downward slope location. The vehicle speeds, $CO_2$ emissions, and noise levels before and after application of speed-maintained standardization were compared. RESULTS: It was found that speed-maintained standardization was effective as a means to reduce speed, as well as $CO_2$ emissions and noise pollution. By applying speed-maintained standardization, it was confirmed that vehicle speeds were reduced consistently. As a result, $CO_2$ emissions and noise levels were decreased by 9% and 11%, respectively. CONCLUSIONS : This study confirmed that speed-maintained standardization in road geometry is effective in reducing vehicle speeds, $CO_2$ emissions, and noise levels. Moreover, there is further scope for the application of this method in the design of roads in urban and rural areas, as well as in the design of highways.

• 소음진동
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• 제13권2호
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• pp.119-128
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• 2003

Abstract Increasing awareness of industrial noise pollution and emerging stricter standards have made noise an important topic of research in electric motors. The standard three-phase induction motors. see Fig. 1, (abbreviated further as TPIM) are mass-produced as being simple, robust and rather inexpensive, as opposed to other types of electric motors. Electric motors use over half of all electricity consumed in most countries. Typically motors consume 60∼80 ％ of the electricity for those used In the industrial sector and about 20∼35 ％ of the electricity for those used in the commercial sector. For that is important to know their participation to the noise pollution of the environment and the efficient ways of their noise reduction. Each step in determining the ways for TPIM electromagnetic noise reduction including the methods that highlight their efficiency, are presented and explained.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.163-168
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• 2007

A light railway operationis an effective means to solve a traffic problem of the city however, noise and vibration is pollution happened. This paper studied noise and vibration pollution of a light railway operation in order to let a decrease. The study range was only track condition and civil engineering structure condition. The way how we decrease noise and vibration in a protection vibration track, ballasted track, non-ballasted track, floating track trends was devoted is long rail laying, low vibration track lying. It was the most economic that the examination results track section a complement, and it was proved that a certain way.