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2 , 4 - DNPH 와 가스크로마토그래프를 이용한 포름알데히드 분석방법
정지연,오세민,이광용,박승현 한국산업위생학회 2000 한국산업보건학회지 Vol.10 No.1
To develop and evaluate formaldehyde measurement method using 2,4-dinitro -phenylhydrazine (2,4-DNPH) coated sampler and gas chromatography, laboratory test and field test were conducted. Results of this study are as follows. Limit of detection(LOD) of measurement methods, HPLC-UVD, GC-NPD and GC-FID, is 0.008㎍/㎖, 0.060㎍/㎖, 0.472㎍/㎖ respectively. Coefficiency of measurement methods, HPLC-FVD, GC-NPD and GC-FID, is 0.008, 0.009, 0.020 respectively. Desorption efficiency of sep-pak xposure aldehyde sampler and sorbent sample tube is 1.05(range : 0.99 - 1.12), 1.02(range : 0.99 - 1.06) respectively. Samples of sorbent sample tube and sep-pak xposure aldehyde sampler turned out to be stored at refrigerator, according to storage test results. Measurement methods of HPLC-UVD, GC-NPD, GC-FID, according to results of precision for the combined sampling and analytical procedure, became acceptable to OSHA evaluation standard. Field test using exposure chamber met the NIOSH overall uncertainty recommendation(less than 25%). Overall uncertainty of Sepak-HPLC(UVD), Tube-GC(NPD), Tube-GC(F)D) is 11.0% - 17.0%. Consequently gas chromatography(GC-NPD, GC- FID) and high performance liquid chromatography(EPA TO-11) using 2.4-DNPH coated sampler for formaldehyde measurement turned out to be suitable to measure personal formaldehyde exposure at workplaces.
인천시 타겟하드닝 CPTED 사업 효과의 실증 분석 및 개선방안 연구
정지연,박현호,전연규 한국경찰연구학회 2023 한국경찰연구 Vol.22 No.1
Burglary is a crime that violates the stability of housing and the basic right to live, and can affect residents' fear of crime. Related municipal ordinances and projects have been implemented as local governments' interest in CPTED projects has grown after recognizing the above seriousness. Among them, target hardening is considered essential as a way to prevent crimes by strengthening crime prevention facilities in houses that are the target of intrusion crimes. Accordingly, the Incheon Metropolitan Government implemented a project to support the installation of crime prevention facilities in the 2021 Incheon Design Spotification Promotion Plan. This paper analyzed the effects of the crime prevention facility installation support project, confirmed the effectiveness of the crime prevention performance facility construction project, local police reliability, and collective efficacy through qualitative interviews. As a result of the survey, it was confirmed that residents' fear level decreased in all specific categories of crime among crime fears, and that the perception of crime prevention performance facilities and trust in local police increased positively after the installation. According to the interview, it is necessary to understand target hardening and CPTED through residents' education, to apply other CPTED products that focus on target hardening, the importance of using crime prevention-certified products, and to facilitate cooperation and communication between related organizations. 주거침입 범죄는 주거의 안정성과 생존권적 기본권을 침해하는 범죄로 주민의 범죄두려움에 영향을 미칠 수 있다. 위와 같은 심각성을 인식하고 실행된 CPTED 사업에 대한 지자체의 관심이 커지면서 관련 시도 조례와 프로젝트가 실행되어 왔다. 그 중에서도 타겟하드닝은 침입범죄의 목표가 되는 주택의 방범시설을 강화하여 범죄를 예방하는 방법으로 적용이 필수적이라고 생각된다. 이에 인천시는 2021년 인천 디자인 명소화 추진계획에서 방범시설 설치 지원 사업을 실행하였다. 본 논문은 방범시설 설치 지원 사업의 전/후 효과를 분석하고 설문조사를 통해 범죄두려움, 방범성능시설 조성사업 효과, 지역경찰 신뢰도, 주민 집합효능감을 확인하였으며 질적 면접조사를 통하여 위의 사업에 대한 시사점을 모색하였다. 설문조사 결과, 범죄두려움 중 범죄의 구체적 두려움의 모든 항목에서 주민들의 두려움 수준이 하락한 것을 확인하였으며, 방범성능시설 인식의 변화와 지역경찰에 대한 신뢰도 방범시설 설치 후에 긍정적으로 상승함을 확인하였다. 면접조사 결과, 주민들 교육을 통한 타겟하드닝과 CPTED의 이해가 필요하며, 타겟하드닝이 중점이 된 CPTED의 다른 제품의 적용이 필요하고, 방범성능 인증된 제품 사용의 중요성, 관련 기관 간의 협업과 소통이 원활하게 진행되어야 한다는 시사점을 도출해 내었다.
버스운전자의 입자상 물질 및 가스상 물질에 대한 노출평가
정지연 용인대학교 자연과학연구소 2008 自然科學硏究所論文誌 Vol.13 No.1
This research project has been carried out to assess the bus drivers exposure of particulate matter(total and respirable, diesel exhaust and gases(CO, NO, NO2) during driving The geometric mean exposure concentration of total, and respirable particulate was 142.1± 1.3㎍/㎥(GM±GSD), 87.4±1.7㎍/㎥(GM±GSD), respectively. The respirable proportion in total particulates during bus driving was much higher than that of manufacturing industry. The mean exposure level of nitrogen monooxide and dioxide was 627.7 ppb, 190.0 ppb. In case of carbon monooxide exposure level was higher during the rush hour time than any other time, but the time weight average exposure level was 1.9 ppm. The exposure level of diesel exhaust material by analysing a elemental carbon was 23.0±2.2㎍/㎥(GM±GSD). The drivers exposure level of particulate matters and gases should be affected by not only bus exhaust itself but also pollutants concentration level of ambient air on driving roads.