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This study was conducted in order to investigate the effect of Volatile Organic Compound emissions in various processes at several manufacture’s sites. The results are as follows : 1. The consuming amount of Stylene, Methanol and Acetone showed relatively higher level at chemical manufacture’s sites. 2. For consumption 691 ㎏/month of Varnish per month, Volatile Organic Compound emissions are calculated as 399 ㎏/month. 3. Emission factors are frequently the best or only method available for estimating emissions, in spite of their limitations. 4. In conclusion, control equipment such as solvent recovery device should be installed in order to minimize Volatile Organic Compound emissions in various processes. It is also necessary too set up Volatile Organic Compound emission standard or operation guideline for each source. Many ventilation systems do not work properly. Problems such as loose fan belts, dirty filters, plugged ducts or dirty fan blades can be easily fixed. Hood problems cause excessively high contaminant levels in the workroom. Situations where airflow into hoods does not meet design criteria are covered under fan or systems problems.
본 연구는 시화ㆍ반월공단의 일부 영세소규모 사업장에 설치되어 있는 국소배기장치와 관련된 대기환경관련법규와 산업안전보건관련법규의 규제에 대하여 사업주 또는 관리자들의 인식도를 조사하였으며 결과는 다음과 같다. 1. 대부분 조사 대상 업체에서 국소배기장치의 전담 관리자를 고용하는 것은 어려운 실정으로 전문성이 부족한 인력에 의해 관리되고 있는 것으로 나타났다. 2. 국소배기장치와 관련된 환경관련 지도ㆍ단속은 84.7%인데 반하여 노동부는 15.3%에 불과 하였으며 지도ㆍ단속 시 현장위주의 기술감사보다는 서류감사에 치중한 것으로 나타났다. 또한 이와같은 지도ㆍ단속이 형식적이기 때문에 효과적이지 않은 것에 대해 지적하였다. 3. 따라서, 노동부보다 환경관련단체의 지도ㆍ단속이 높은 강도와 많은 횟수 때문에 55.7%가 ‘공기정화기 배출구의 배출농도에만 관심을 갖게 되고 작업장 내에서 근로자에게 폭로되는 유해물질 농도에는 등한시 하게 된다’고 지적하였다. 4. 제도개선 방안으로 국소배기장치의 운영관리를 전문기관에 위탁관리 하거나 관리자를 전문 교육기관의 양성교육을 통하여 적절히 관리하도록 하고, 지도ㆍ단속을 효율적으로 하기위해 관련법규의 일원화가 필요하며, 전문기관을 통한 기술지원 및 자금지원을 확대 시행하는 것이 필요하다. The purpose of this survey is to research business owners' or managers' awareness of small business entities on rules and regulations of atmosphere environment and industry safety and health in relation to local exhaust ventilation system installed in Shihwa and Banwoul industrial complex. The results of the survey are as follows: 1. The majority of the participants have not so specialized resources to manage the local exhaust ventilation, for it is practically difficult to hire an expert as a designated manager for the local exhaust. 2. The environmental organizations' guidance and regulation on local exhaust ventilation take up 84.7% while those of Ministry of Labor take up 15.3%. It demonstrates that guidance or regulation on local exhaust ventilation was focused not on technical field audit but on paper work. It was an ineffective formality. 3. Environmental organizations conduct their guidance and regulation more strictly and more often than the Ministry of Labor. Consequently, companies tend to pay more attention toemission concentration of air cleaner outlet (55.7%) and relatively, less attentive of density of harmful substances at the work place. 4. In an effort to improve the existing systems, it is necessary to give a third party agency charge of management of local exhaust ventilation. In addition, people in charge should be provided a 'basic training course' in the professional training institute. For more effective guidance or regulation, consistent rules and regulations should be enforced and more intensive and extensive 'technology service' and 'finance service' from specialized organizations should be provided.
본 연구는 시화ㆍ반월공단의 일부 영세소규모 사업장에 설치된 국소배기장치의 설치현황 및 유지ㆍ관리 실태를 파악하고 각 사업장에 설치된 후드의 성능을 점검하였으며 결과는 다음과 같다. 1. 국소배기장치와 관련된 보조금ㆍ융자금 제도는 3분의2 이상업체가 지원받은 적이 없고 지원받은 업체 또한 실효성에 의문을 제기하고 있다. 2. 국소배기장치를 최초 설치할 때 52.9%의 업체가 한 가지 이상의 어려움을 겪었으며, 68.6%의 업체에서 국소배기장치를 효율적으로 유지ㆍ관리하기 어렵다고 호소하였다. 3. 국소배기장치 성능검사(performance test)는 53개사 85개 후드에서 실시하였으며, 측정된 개구 면풍속(open velocity, m/sec)은 외부식 슬로트형(slot type)이 1.19, 캐노피형(canopy type)이 1.02, 포위식의 부스형(booth type)이 0.45, 레시버형(receiver type)이 1.05(10.6%)로 레시버형 후드 외에는 모두 법정제어풍속(provide control velocity) 미만으로 나타났다. 4. 제도 개선 방안으로 국가에서 국소배기장치관련 국고지원사업(national funds support-business)을 실시하거나, 형식적인 국고지원사업이 되지 않기 위해 지원규모를 조정해야 한다. The purpose of this survey is to research the installation, maintenance, and management state of local exhaust ventilation system and inspect functions of installed hoods in small business entities in Shihwa and Banwoul industrial complex. The results of the survey are as follows: 1. 2/3 of the survey participants have never had financialsupport such as subsidy or loan for local exhaust ventilation and those who have had the support previously, in fact, doubt about the effectiveness of financial support. 2. More than 52.9% of the survey participants experienced more than one difficulty installinglocal exhaust ventilation initially and 68.6% of the survey participants have found it challenging to maintain and manage local exhaust ventilation effectively. 3. Performance test for local exhaust ventilation was conducted for 85 hoods of 53 companies. In light of open velocity(m/sec), the slot type was 1.19, canopy type was 1.02, booth type was 0.45, and receiver type was 1.05 (10.6%). According to the test, every hood typeexcept for receiver type shows velocity less than 'provide control velocity'. 4. In an effort to improve the management system, the government could implement 'national funds support business' in relation to local exhaust ventilation. More importantly, the government support should be adjusted and optimized to be applied effectively.
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Laboratory methods commonly used today are biochemical oxygen demand. chemical oxygen demand, and total organic carbon. Establishment of constant relationships among the various measures of organic content depends primarily on the nature of the wastewater and its source. Of al1 the measures, the most difficult to correlate to the others is the BODs test. because of the problems associated with biological tests The results were summarized as follwos , 1. For typical municipal wastes, however, the SBODs / SCODcr ratio varies from 0.14 to 0.34(mean 0.21). SBODs / STOC ratio varies from 0.35 to 1.19(mean 0.69) 2. Correlation analysis between the SBODs and SCODcr gave good correlation coefficient r = 0.903 and the equation Y = 3.756X + 16,221 was obtained 3. The correlation between the SBOD5 and STOC was well presented with equation Y = l ,070X + 7,637, and also correlation coefficient r = 0.821 4. The correlation between the SCOD , and STOC was well presented with equation Y = 0.256X+5.513 and also correlation coefficient r = 0.816 5. Becaus안 of the rapidity with which the TOC test can be conducted‘ it is anticipated that more use will be made of these tests in the future
This paper was conducted concerning the degree of indoor air quality in public transport vehicles such as taxicabs, buses and subway trains, as sampled through the active participation of drivers and passengers in Seoul between 13th August 2005 and 2nd November 2005. The results were summarized as follows: 1. Among the measured substances especially respirable particulate matters (PM₁?), total bacteria counts (TBC) and carbon dioxide (CO₂) exceeded the standard level of 150 ㎍/㎥, 800 CFU/㎥ and 1000ppm. 2. The concentration of carbon dioxide (CO₂) in taxi recorded 2491ppm, which is more than the standard amount of 1000ppm. This level was comparatively higher than all other public transportation methods. Total bacteria counts (TBC) in bus and subway recorded 1082CFU/㎥ and 1856CFU/㎥, respectively. 3. The drivers who regularly work long hours showed the higher concern about contamination of the air inside the public transport vehicles and they considered it to be worse than the air outside. In contrast, the general public showed less concern about the air quality inside the public transport vehicles. However, they too acknowledged that the quality of the air inside the public transport vehicles was poor. In regards to the degree of indoor air quality in the public transport vehicles, a counterplan must be implemented urgently to effectively combat the excessive levels of PM₁?, microorganism and CO₂. We need to gather more conclusive evidence pertaining to other possible contaminants and influencing factors.