공업단지 내와 인근 풍하지점의 주요 VOCs 성분별 농도측정 및 분석

김득수,양고수,박비오 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-

It has been knoun that many kinds of VOC(volatile organic compound) and odorous compound's sources are in the urban and industrial areas and intensify their emissions into the atmoshere. These VOCs have adverse effects in human health and trees directly, and VOCs have an important role in production of the photochemical smog such as ozone and fine particles, so they decrease visibility and deteriorate the urban air quality as well. Specifically, in urban atmosphere, hydroxy radicals(OH) are produced largely by chemical reactions involving the VOCs emitted from vehicles. The OH promote the photochemical reactions and makes more secondary pollutants into the atmosphere. It will be necessary to make proper management plans to preserve the air quality in good level for the peoples. In order to make these plans, source information and detail emission inventory of the city and near industrial areas should be given. However, lack of the source measurements data makes us more difficult to complete the source inventory. VOC source inventory could be utilized for the feasibility study to estimate the contribution of VOC sources presenting to the receptor such as residential area. It may give policy maker and idea how to control the air quality, and improve their social environment in the area. This study shows preliminary data that measured VOC concentrations from the local industrial areas in Jeonju during from May to October 2005. The samples from the 2 receptor sites (one is at center of the industrial area and the other site is at distance residential area dounwind from the center) were collected and analyzed for the comparison to source concentration. The mass contributions of the speciated VOC from the different sources and ambient (2 receptors) were presented and discussed.

전주산업단지 및 주변지역 VOCs 및 악취물질 모니터링

김용문,박비오,고영삼,심재정,송병식,양고수 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

Important main odorous compounds and VOCs(volatile organic compounds) possibly emitted from the Jeon-Ju Industrial Sites were identified and measured in amount through making air sampling over Jeon-Ju Industrial Sites and analyzing them with the sate of the art analytical instrument. Sampling sites were chosen 8 points by considering the industrial characteristics for the 1,2 Industrial Sites and 2 points for the 3 Industrial. Site Sampling times were two times, the first one was March. 2002 - April. 2002, and the second was May. 2002 - July. 2002. Canister sampling units and polyester bags were used to collect 6 liters air samples during 1hour or 3minutes for VOCs and polyester bags were used to sample 10 - 50 liters of air for 3 minutes depending on analytic characteristics of odor compounds. The important main VOCs were measured as acetone, ethyl benzene, n-hexane, m,p-xylene, toluene, M.E.K.(methyl ethyl ketone), isopropanol, ethyl acetate, o-xylene, n-butyl acetate, ethanol, benzene as in order of average concentration for the Industrial Sites. The main odorous compounds were COS, H2S, CS2, MM(methyl mercaptan), form aldehyde, acetaldehyde for the 1,2 Industrial Sites and COS, H2S, form aldehyde, acetaldehyde were measured as main species for the 3 Industrial Site. NH3 was measured as below the detection limit of the instrument. The concentrations of sulfide compounds for the 1,2 Industrial Sites were relatively higher than ones for the 3 Industrial Site. Among aldehydes, form aldehyde, acetaldehyde were detected very highly as 0.1- 1ppm over all the Industrial Sites.

전주산업단지 및 주변지역 VOCs 및 악취물질 모니터링(Ⅱ)

박성순,김용문,박비오,양고수 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-

Important main odorous componds and VOCs(volatile organic componds) possibly emitted from the Jeon-Ju Industrial Sites were identified and measured in amount through making air sampling over Jeon-Ju Industrial Sites and analyzing them with the sate of the art analytical instrument. Sampling sites were chosen 8 points by considering the industrial characteristics for the 1,2 Industrial Sites and 2 points for the 3 Industrial. Site Sampling times were two times, the first was September. 2002, the second was November. 2002, and the third February. 2003. Canister sampling units and polyester bags were used to collect 6 liters air samples during 1hour or 3 minutes for VOCs and polyester bags were used to sample 10∼50 liters of air for 3 minutes depending on analytic characteristics of odor compounds. The important main VOCs were measured as ahexane(11.7ppb), 2-methyl(10.3ppb), methyl acetate(9.3ppb), methyl cyclopentane(7.2ppb), dichloromethane(5.2ppb), toluene(4.9ppb), m,p-xylene(4.8ppb), methanol(4.7ppb), M.E.K(methyl ethyl ketone : 3.9ppb), ethyl benzene(3.6ppb), n-undecane(3.6ppb), o-xylene(2.6ppb), 2-methyl hexane(2.6ppb), n-butylacetate(2.4ppb) as in oder of average concentration for the Industrial Sites. In the case of measurement ingredient for sulfur compounds, appeared by MM (N.d - 1.67ppb), DMS(N.d - 1.32ppb), DMDS(N.d - 1.76ppb). NH_(3) was measured as below the detection limit of the instrument. Among aldehydes, form aldehyde, acetaldehyde were detected very highly as 0.1- 1ppm over all the Industrial Sites.

Differential expression of the major catalase, KatA in the two wild type Pseudomonas aeruginosa strains, PAO1 and PA14

Bi-o Kim,정인영,조유희 한국미생물학회 2019 The journal of microbiology Vol.57 No.8

KatA is the major catalase required for hydrogen peroxide (H2O2) resistance and acute virulence in Pseudomonas aeruginosa PA14, whose transcription is governed by its dual promoters (katAp1 and katAp2). Here, we observed that KatA was not required for acute virulence in another wild type P. aeruginosa strain, PAO1, but that PAO1 exhibited higher KatA expression than PA14 did. This was in a good agreement with the observation that PAO1 was more resistant than PA14 to H2O2 as well as to the antibiotic peptide, polymyxin B (PMB), supposed to involve reactive oxygen species (ROS) for its antibacterial activity. The higher KatA expression in PAO1 than in PA14 was attributed to both katAp1 and katAp2 transcripts, as assessed by S1 nuclease mapping. In addition, it was confirmed that the PMB resistance is attributed to both katAp1 and katAp2 in a complementary manner in PA14 and PAO1, by exploiting the promoter mutants for each -10 box (p1m, p2m, and p1p2m). These results provide an evidence that the two widely used P. aeruginosa strains display different virulence mechanisms associated with OxyR and Anr, which need to be further characterized for better understanding of the critical virulence pathways that may differ in various P. aeruginosa strains.

황 담체를 이용한 독립영양 탈질의 효율에 관한 연구

김비오 ( Bi O Kim ),김흥철 ( Heung Chul Kim ),윤지현 ( Ji Hyun Yoon ),박재구 ( Jai Koo Park ),한기봉 ( Gee Bong Han ) 한국물환경학회 2007 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2007 No.-

청년가구의 주거빈곤에 영향을 미치는 요인에 관한 연구

김비오 ( Kim Bi-o ) 한국보건사회연구원 2019 保健社會硏究 Vol.39 No.3

본 연구는 청년가구의 주거빈곤에 영향을 미치는 요인을 분석하는 것을 목적으로 한다. 본 연구에서는 청년과 주거빈곤에 대한 선행연구 검토를 통해 인구사회학적 특성(성별, 교육 년 수), 노동시장 관련 특성(경제활동 참여 상태), 가구 특성(저소득 1인가구 여부, 원가족 지원 정도, 경상소득), 주거 특성(대도시 거주 여부, 주택 점유 형태)을 독립변수로 설정하였고, 최저주거기준 미달 여부, 주거비 과부담 해당 여부, 주거빈곤 해당 여부를 독립변수로 설정하였다. 분석을 위해 한국복지패널의 제 12차 년도 자료(2017년)에서 가구주의 나이가 만 19세 ~ 만 34세인 청년 가구주 표본을 추출하여 기술통계 및 로지스틱 회귀분석을 실시하였다. 연구결과 첫째, 청년 가구 중 최저주거기준을 충족하지 못하거나 주거비 과부담에 해당하는 가구인 주거빈곤 가구는 33.1%로 나타났다. 둘째, 청년가구의 최저주거기준 미달 여부에 영향을 미치는 요인은 성별, 교육 년 수, 경제활동 참여 상태, 저소득 1인 가구 여부, 대도시 거주 여부로 나타났다. 셋째, 청년가구의 주거비 과부담 해당 여부에는 저소득 1인 가구 여부와 경상소득, 대도시 거주 여부가 영향을 미치는 것으로 나타났다. 넷째, 청년가구의 주거빈곤 해당 여부에는 성별, 교육 년 수, 저소득 1인 가구 여부, 경상소득, 대도시 거주 여부가 영향을 미치는 것으로 나타났다. 이상의 연구 결과를 바탕으로 본 연구에서는 청년을 위한 지속적인 사회적 주택 보급의 필요성과 주거의 질적인 측면에서의 보완 및 고려의 필요, 청년을 위한 정책의 확대가 필요함을 제언하였다. The purpose of this paper is to analyze the factors affecting the housing poverty of youth households. In this study, through a review of preceding study on youth and housing poverty, we set sociodemographic characteristics (sex, education years), labor market characteristics (economic participation status), household characteristics (low-income one-person household or not, level of support for original family, current income), housing characteristics (whether or not residing in a metropolitan city, housing occupation type) as independent variables. The analysis was performed on whether the independent variables affected the dependent variables―housing quality, house affordability, and the housing poverty. For the analysis, the 12th year data (2017) of the Korea welfare panel study extracted samples of youth household heads aged 19 to 34 and analyzed by descriptive statistics and logistic regression. Analysis result, First, 33.1% of youth household were housing poverty who do not meet the based on housing quality or excessive housing costs. Second, Factors influencing the based on housing quality meet or not of youth household were sex, education years, economic participation status, low income one person household or not, reside in metropolitan city or not. Third, Factors influencing the excessive house affordability of youth household were low income one person household or not, current income, reside in metropolitan city or not. Fourth, Factors influencing the housing poverty of youth household were sex, education years, low income one person household or not, current income, reside in metropolitan city or not. Based on the results of the above analysis, This study suggests the necessity of continuous social housing for youth, the necessity of supplement and consideration in terms of quality of housing, and expansion of policies for youth.

소비 공간 발전과 소비 패러다임의 변화에 관한 연구

김용승(Kim, Yong-Seung),김현오(Kim, Hyeon-O),김은비(Kim, En-bi),김현아(Kim, Hyun-A) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2

Room Temperature Ferrimagnetism and Ferroelectricity in Strained, Thin Films of BiFe _0.5 Mn _0.5 O ₃

Choi, Eun-Mi,Fix, Thomas,Kursumovic, Ahmed,Kinane, Christy J,Arena, Darí,o,Sahonta, Suman-Lata,Bi, Zhenxing,Xiong, Jie,Yan, Li,Lee, Jun-Sik,Wang, Haiyan,Langridge, Sean,Kim, Young-Min,Borisevich John WileySons, Ltd 2014 Advanced Functional Materials Vol.24 No.47

<P>Highly strained films of BiFe<SUB>0.5</SUB>Mn<SUB>0.5</SUB>O<SUB>3</SUB> (BFMO) grown at very low rates by pulsed laser deposition were demonstrated to exhibit both ferrimagnetism and ferroelectricity at room temperature and above. Magnetisation measurements demonstrated ferrimagnetism (<I>T<SUB>C</SUB></I> ∼ 600K), with a room temperature saturation moment (<I>M<SUB>S</SUB></I>) of up to 90 emu/cc (∼ 0.58 <I>μ<SUB>B</SUB></I>/f.u) on high quality (001) SrTiO<SUB>3</SUB>. X-ray magnetic circular dichroism showed that the ferrimagnetism arose from antiferromagnetically coupled Fe<SUP>3+</SUP> and Mn<SUP>3+</SUP>. While scanning transmission electron microscope studies showed there was no long range ordering of Fe and Mn, the magnetic properties were found to be strongly dependent on the strain state in the films. The magnetism is explained to arise from one of three possible mechanisms with Bi polarization playing a key role. A signature of room temperature ferroelectricity in the films was measured by piezoresponse force microscopy and was confirmed using angular dark field scanning transmission electron microscopy. The demonstration of strain induced, high temperature multiferroism is a promising development for future spintronic and memory applications at room temperature and above.</P>

Biomechanical Changes of the Lumbar Segment after Total Disc Replacement : Charite$^{(R)}$, Prodisc$^{(R)}$ and Maverick$^{(R)}$ Using Finite Element Model Study

Kim, Ki-Tack,Lee, Sang-Hun,Suk, Kyung-Soo,Lee, Jung-Hee,Jeong, Bi-O The Korean Neurosurgical Society 2010 Journal of Korean neurosurgical society Vol.47 No.6

Objective : The purpose of this study was to analyze the biomechanical effects of three different constrained types of an artificial disc on the implanted and adjacent segments in the lumbar spine using a finite element model (FEM). Methods : The created intact model was validated by comparing the flexion-extension response without pre-load with the corresponding results obtained from the published experimental studies. The validated intact lumbar model was tested after implantation of three artificial discs at L4-5. Each implanted model was subjected to a combination of 400 N follower load and 5 Nm of flexion/extension moments. ABAQUS$^{TM}$ version 6.5 (ABAQUS Inc., Providence, RI, USA) and FEMAP version 8.20 (Electronic Data Systems Corp., Plano, TX, USA) were used for meshing and analysis of geometry of the intact and implanted models. Results : Under the flexion load, the intersegmental rotation angles of all the implanted models were similar to that of the intact model, but under the extension load, the values were greater than that of the intact model. The facet contact loads of three implanted models were greater than the loads observed with the intact model. Conclusion : Under the flexion load, three types of the implanted model at the L4-5 level showed the intersegmental rotation angle similar to the one measured with the intact model. Under the extension load, all of the artificial disc implanted models demonstrated an increased extension rotational angle at the operated level (L4-5), resulting in an increase under the facet contact load when compared with the adjacent segments. The increased facet load may lead to facet degeneration.

고속도로 교통사고 심각도 분석을 위한 의사결정규칙 개발

김미정(KIM, Mijeong),정은비(Jeong, Eun-Bi),오철(O, Cheol) 대한교통학회 2013 대한교통학회 학술대회지 Vol.68 No.-

교통사고는 인적요인, 도로 기하구조요인, 교통류요인, 환경적요인 등 다양한 요인에 의해 발생하며, 이러한 교통사고를 감소시키기 위해서는 사고원인 및 사고특성에 대한 조사와 분석이 필요하다. 본 연구에서는 2012년 전국 고속도로 교통사고를 대상으로 교통사 고 심각도에 영향을 미치는 요인들에 대해 분석하였다. 의사결정트리(Decision tree)를 이용하여 교통사고의 원인 및 특성을 분석하 였으며, 교통사고 심각도 분석을 위한 의사결정규칙을 개발하였다. 종속변수를 사고심각도로 설정하고 사고심각도에 영향을 미칠 것으로 판단되는 인적요인, 도로 기하구조요인, 환경적요인 등의 변수를 독립변수로 설정하여 분석을 수행하였다. 분석결과, 고속도 로에서 사고 발생 시 심각도에 가장 큰 영향을 미치는 중요 변수는 날씨(기상)로 나타났으며 그 외에 사고직전속도, 복합선형, 종단 구배, 평면선형, 주야, 조명유무로 나타났다. 맑음 또는 흐림의 정상기상에서의 사고는 주야, 승용차유무, 사고직전속도, 복합선형, 종단구배, 요일이 심각도에 영향을 미치는 것으로 나타났으며 악천후 기상에서의 사고는 복합선형, 주야, 평면선형, 조명유무가 영 향을 미치는 것으로 나타났다. 본 연구에서 제시한 의사결정규칙은 향후 교통사고 심각도 감소를 위한 정책 결정 및 교통안전을 위 한 교통안전정책, 교통류관리전략 등 정책 수립을 위한 의사 결정 시 기초자료로 활용이 가능할 것으로 기대된다.