필터소재에 따른 담배필터의 생분해성 비교

고동균,김수호,신창호,이영택,김정열,김종열,Ko Dongkyun,Kim Soo-Ho,Shin Chang-Ho,Lee Young-Taek,Kim Chung Ryul,Kim Jong-Yeol 한국연초학회 2005 한국연초학회지 Vol.27 No.1

This work investigated biodegradability for the cellulose acetate, carbon dual, paper and web used to cigarette filter materials by soil test. Also, because of demanded a lot of the time and effort in case of soil test, the possibility of biodegradation by enzyme was studied. The evaluation of degradation for the filter materials by soil test was examined with the naked eye, electron microscopy and weight loss. The biodegradability according to the filter materials was represented in the order of paper > web > carbon dual > cellulose acetate without relating to the evaluation methods. Experiment of biodegradability by the cellulase(E C 3.2.1.4, Trichoderma viride) among the several biodegradability enzymes was demanded reaction time of the $5\~10$ hours and represented the same result with that of soil test.

차량 적용을 위한 HCNG의 연소 및 배출가스 특성에 관한 연구

고동균(Dongkyun Ko),이한승(Hanseung Lee),최슬기(Sulki Choi),임윤성(Yunsung Lim),조용석(Yongseok Cho),이성욱(Seangwock Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

Nowadays, fuel receiving attention in the situation that we need alternative energy which is able to solve both the depletion of petroleum resources and environmental problems is natural gas and hydrogen. HCNG is an abbreviation of Hydrogen-Compressed Natural Gas and means fuel which is compound of natural gas and hydrogen. Natural gas is in the limelight as clean fuel because the reserve of it is a large mount and exhaust is less. However, compressed natural gas has slow rate of flame propagation and low limit of flammability. This drawback makes mileage and efficiency worse comparing to existing fuel. In order to make up for the drawback, hydrogen which has fast rate of flame propagation is added, then it makes limit of flammability high. in case of using this fuel with an engine, lean burn can be possible. It makes not only combustion efficiency better but also combustion temperature lower because of lean burn. So, formation of NOx is fundamentally stopped and it finally makes NOx emission reduced dramatically. H/C rate of HCNG fuel is higher than existing fossil fuel, which is advantage of it. An increase of H/C rate can cause reduction of greenhouse gas emission by a decrease of creating CO₂ per on the unit energy. Combustion characteristics were confirmed by CVC experiment and reduction of NOx and CO₂ was ascertained by Chassis Dynamometer experiment.

저부류연 궐련지의 이화학적 특성과 주 $\cdot$ 부류연 연기성분 이행특성

김수호,고동균,임희진,신창호,이영택,김정열,이동욱,김종열,Kim Soo-Ho,Ko Dongkyun,Lim Heejin,Shin Chang-Ho,Lee Young-Taek,Kim Chung Ryul,Lee Dong-Wook,Kim Jong-Yeol 한국연초학회 2005 한국연초학회지 Vol.27 No.1

This study was conducted to evaluate the effect of additives in low sidestream cigarette papers, such as Mg$(OH)__2,\;TiO_2\;and\;KH_{2}PO_4$ on the delivery of mainstream and sidestream smoke. From the analysis of tar and nicotine in sidestream and mainstream smoke, the delivered ratios of tar and nicotine by sidestream to mainstream smoke in common cigarette paper were 5.32 and 8.60, respectively. However, the delivered ratios of those of the paper containing $Mg(OH)_2\;were\;2.25\~3.23,\;4.86\~7.14,\;Mg(OH)_2\;and\;KH_{2}PO_4\;were\;2.12\~2.92,\;4.67\~6.89,\;TiO_2\;was\;3.21,\;7.51 $ respectively. The deliver patterns of semi-volatile components in the cigarettes were similar each there, but a slight different pattern in the amount was observed depending on the kinds of compounds added in cigarette papers. In the cigarettes made of $Mg(OH)_2$ added paper, the aromatic components such as benzene, toluene and phenol were generated more while the aliphatic components like neophytadiene, ethyl decanoate were delivered less than the cigarettes made of common cigarette papers. However, the cigarettes manufactured with $Mg(OH)_2\;and\;KH_2PO_4$ added paper showed an opposite trend. The cigarettes made of $TiO_2$ added paper showed relatively low delivery in the most compounds measured. In sensory evaluation, cigarette papers tested were noticed a distinguishable sensory character between the low sidestream smokes with additive cigarette papers except $TiO_2$ added one. Moreover, aroma patterns detected by a electronic nose system in TPM were a similar tendency.

탄소복합필터의 triacetin 함량 분석

김수호,고동균,김정열,이동욱,신창호,김종열,Kim Soo-Ho,Ko Dongkyun,Kim Chung Ryul,Lee Dong-Wook,Shin Chang-Ho,Kim Jong-Yeol 한국연초학회 2005 한국연초학회지 Vol.27 No.1

Glycerol triacetate(triacetin) is the currently used common plasticizer in the making filters from cellulose acetate tow. For the mono acetate filter, the determination of triacetin contents is already established by CORESTA recommended method (No. 59). But unfortunately, the analytical method of triacetin in the activated carbon filter have not reported so far. In this study, it was established the analytical method of carbon filter's triacetin contents at various extraction conditions, bath ratio and internal standard materials. The confidential level appeared above $95\%$ when the extraction time, ISTD material and bath ratio was 3 hours, tripropionin and below 500 mg activated carbon / 50 $m\ell$ ethanol, respectively. Also, in the distribution of triacetin with filter materials in activated carbon filters, the triacetin amount was the most contained in activated carbon. Therefore, this method can be applied to the determination of triacetin contents in the activated carbon filter.

디지털 불평등 해소를 위한 메타버스 활용 알고리즘 제시

고주호(JuHo Ko),강동영(DongYeong Kang),권용현(YongHyun Kwon),고동균(DongKyun Go),배주환(JuhWan Bae),지승한(SeungHan Ji) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.11

본 논문은 디지털 이민자 세대의 디지털 불평등을 해소를 위한 메타버스 활용 알고리즘을 제시한다. 중장년층 또는 아동 유저가 유입됐을 때 단계별 최적화 된 알고리즘을 구현하여 특정 세대에 치중된 디지털 불평등을 해소하고 전 세대에 걸쳐 메타버스로의 접근성을 높이는 것을 목적으로 한다. In this paper presents a metaverse utilization algorithm for resolving digital inequality of the Digital Immigrants generation. It aims to solve digital inequality focused on a specific generation and increase access to the metaverse across all generations by implementing an algorithm optimized for each stage when middle-aged or young users are introduced.

기능성 실리카겔과 첨착 활성탄에 의한 주류연 중 시안화수소와 알데히드의 선택적 흡착

임희진,신창호,양범호,홍진영,고동균,이영택,Lim Heejin,Shin Chang-Ho,Yang Burm-Ho,Hong Jin-Young,Ko Dongkyun,Lee Young-Tack 한국연초학회 2005 한국연초학회지 Vol.27 No.2

Coconut based activated carbon and silica-gels were impregnated with 3-aminopropyltri ethoxysilan(APS) and N-(2-aminoethyl)-3-aminopropyl triethoxysilane (AEAPS) in order to investigate the effect of the amine group and the pore size of the supports on the removal of hydrogen cyanide(HCN) and aldehydes in mainstream smoke(MS). The physicochemical properties of the supports were analyzed by using thermal gravity analyzer(TGA), $N_2$ adsorption and desorption isotherms$(BET,\;N_2)$, and SEM-EDS. According to our experimental data, there was no significant difference in the delivery amount of HCN and aldehydes of non-functionalized silica-gels having meso-pores bigger than $20\AA$. In the case of silica-gels functionalized with APS(APS silica-gel), the delivery amounts of hydrogen cyanide(HCN) and aldehydes decreased with the increase of APS concentration. Silica-gel functionalized with AEAPS(AEAPS silica-gel) showed higher removal efficiency than that of APS silica-gels. The delivery amounts of HCN and aldehydes of activated carbon impregnated with APS and AEAPS increased with the increase of the APS and AEAPS concentrations. In accordance with the specific surface area analysis results, APS and AEAPS molecules decreased the specific surface area by blocking the micro-pores of the activated carbon. The volatile organic components removal efficiency by the micro-pores was higher than that of the amine group impregnated into the activated carbon.