Now & Then 도시 : 현대적 풍경 _ 조성준

조성준,이규상,김대욱 (주)월간사진 2020 월간 사진 Vol.631 No.-

광전계센서를 이용한 지뢰탐지 GPR 시스템 개발 연구

조성준,Ryohey Tanaka,Motoyuki Sato,김정호 한국자원공학회 2007 한국자원공학회지 Vol.44 No.3

광전계 센서를 이용한 지뢰탐지 GPR(Ground penetrating radar) 시스템을 개발하였다. 광전계 센서는 측정되는 전기장의 왜곡을 최소화하며, 크기와 무게가 매우 적어 측정 장치로 운용하기가 용이하므로 지뢰탐지와 같이 세밀한 주의가 요구되는 곳에 적합하다. 송수신 장치 역할을 하는 벡터 네트워크 분석기, 광신호 발생기와 광검파기를 탑재한 광변조기, 그리고 double-ridged horn 송신 안테나와 광전계 센서를 이용한 수신부로 구성된 스텝 주파수 레이더 시스템과 이 시스템의 매우 긴 측정시간의 단점을 극복하기 위해 임펄스 발생기와 오실로스코프로 구성된 임펄스 레이더 시스템을 또한 개발하였다. 두 시스템을 비교한 결과 S/N 비 등 측정된 자료의 수준은 거의 동일하나 측정시간은 임펄스 레이더 시스템이 스텝 모드 측정의 경우 8배 이상 빠르고, 연속 모드로 측정한 경우는 100 배 이상 빨라 질 수 있음을 확인하였다. 또한 이 임펄스 레이더 시스템을 PMN2 지뢰모형에 대해 현장과 비슷한 환경에서 실험실내 모형실험에 적용하여 성공적으로 지뢰모형의 영상을 획득하였다. In order to apply to landmine detection effectively, a ground penetrating radar (GPR) system using an optical electric field sensor (OEFS) as a receiver has been developed. The OEFS is very small and light. It uses optical fiber instead of metallic coaxial cable and doesn’t need any electric device inside and near electrode for the measurement of electric filed, which can lead to reduce the deformation of electric field. The sensor has been tested in stepped frequency radar system which consists of a vector network analyzer, a fixed double-ridged horn antenna as a transmitter, laser generator and optical demodulator. The system, however, has serious problem for real application on the landmine detection; it needs very long measurement time. To overcome the problem, an impulse radar system has also been developed using a digital oscilloscope and an impulse generator. The impulse radar system could reduce the scanning time down to 1/100 compared to the stepped frequency system without compromising the sensitivity. It was applied to a PMN2 mine model buried in a sand pit in laboratory and the PMN2 mine could be identified clearly from the scanned image with sufficient resolution.

[RCOOH]-$\varepsilon$-Caprolactam-Montmorillonite 층간화합물의 합성과 고진공상태하에서의 등온 분해에 관한 연구

조성준 한국세라믹학회 1996 한국세라믹학회지 Vol.33 No.8

In this research [RCOOH]-$\varepsilon$-Caprolactam-Montmorillonite was synthesized by reaction between Na-Mont-morillonite (10-Carboxy-n-decyl)dimethylethylammonium (=RCCOH) ion and $\varepsilon$-Caprolactame-Motmorillonite ob-tained was 3.62$\AA$ After heat treatment of this intercalations complex at 37$^{\circ}C$ in high vacuum for 12 h 24 h, 40 h and 90 h the basal spacing was reduced to 35.8$\AA$, 34.2, 17.5 $\AA$ and 16.6$\AA$ respectively. The calculated amount of free $\varepsilon$-caprolactame included int he intercaltions complex and that of $\varepsilon$-caprolactame which is interca-lated into the interlayer space of montomorillonite and still remained after heat treatment are 4.6~4.9 and 0.5 molecules per unite cell of montmorillonite respectively.

대기 중 휘발성유기오염물질의 환경, 개인 및 인체 노출의 상관성 연구

조성준,신동천,정용,Patrick N. Breysse 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.3

Volatilc organic compounds (VOCs) are an important public health problem throughout the world. Many important questions remain to be addressed in assessing exposure to these compounds. Because they are ubiquitous and highly volatile, special techniques must be applied in the analytical determination of VOCs. Personal exposure measurements are needed to evaluate the relationship between microenvironmental concentrations and actual exposures. It is also important to investigate exposure frequency, duration, and intensity, as well as personal exposure characteristics. In addition to air monitoring, biological monitoring may contribute significantly to risk assessment by allowing estimation of absorbed doses, rather than just the external exposure concentrations, which are evaluated by environmental and personal monitoring. This study was conducted to establish the analytic procedure of VOCs in air, blood, urine and exhaled breath and to evaluate the relationships among these environmental media. The subjects of this study were selected because they are occupationally exposed to high levels of VOCs. Environmental, personal, blood, urine and exhalation samples were collected. Purge & trap, thermal desorber, gas chromatography and mass selective detector were used to analyze the collected samples. Analytical procedures were validated with the "break through test", "recovery test for storage and transportation", "method detection limit test" and "inter-laboratory QA/QC study". Assessment of halogenated compounds indicted that they were significantly correlated to each other (p value < 0.01). In a similar manner, aromatic compounds were also correlated, except in urine sample. Linear regression was used to evaluate the relationships between personal exposures and environmental concentrations. These relationships for aromatic and halogenated are as follows: Halogens_(personal)=3.875+0.068Halogens_(evironmet)(R²=.930) Aromaties_(personal)=34217.757-31.266Aromatics_(evironmet)(R²=.821) Multiple regression was used to evaluate the relationship between exposures and various exposure determinants including, gender, duration of employment, and smoking history. The results of the regression modeling for halogens in blood and aromatics in urine are as follows: Halogens_(blood)=8.181+0.246Halogens_(personal)+3.975Gender(R²=.925), Aromatics_(urine)=249.565+0.135Aromatics_(personal)-5.651D.S(R²=.735), In conclusion, we have established analytic procedures for VOC measurement in biological and environmental samples and have presented data demonstrating relationships between VOCs levels in biological media and environmental samples.

Model-System으로서의 몬트모릴로나이트의 층간화합물에 한 연구(V)

조성준,Sung-Jun Cho 배재대학교 공학연구소 2004 공학논문집 Vol.6 No.2

본 연구에서는 양이온교환방응에 의해 몬모릴로나이트 층 내의 금속 양이온을 긴 알킬 사슬을 갖는 유기 양이온으로 치환시켜 물성이 전혀 다른 유기 점토화합물인 몬모릴로나이트 층간 화합물을 합성한 후, 이 층간화합물을 증류수, 메탄올, 아세톤, 에테를 및 아세토니트릴 등과 같은 상이한 팽윤액체와 반응시켜 팽윤거동에 대하여 연구하였다. 특히 연구에 사용된 점토로는 한국산과 터키산의 두 가지 상이한 몬모릴로나이트를 선정하여 두 점토의 층간화합물 및 팽윤거동에 대하여 비교.분석하였다. In this research montmorillonite intercalations complexes as organophilic clay compounds which have very different properties as the starting clay mineral were synthesized by the substitution of metal ions which exist in the montmorillonite layers with the organic cations which have long alkyl chain by the cation exchange reaction. Thereafter the obtained products dried in high vacuum were treated with the various swelling liquids such as dist. water, methanol, acetone, ether and acetonitrile in order to know the swelling behaviour of the synthesized complexes. Especially for this research Korean and Turkish clays were selected to compare the intercalations complexes of both clays and their swelling behaviour.

머신러닝(인공지능)의 산업 응용

조성준,강석호 대한산업공학회 2016 ie 매거진 Vol.23 No.2

Model-system으로서의 몬트모릴로나이트의 층간화합물에 관한 연구 (I)

조성준,김종옥,Jo, Seong-Jun,Kim, Jong-Ok 배재대학교 자연과학연구소 1992 自然科學論文集 Vol.5 No.1

양이온 교환반응에 의해 몬트모릴로나이트내의 금속 양이온을 긴 chain을 갖는 유기 양이온 tenside로 치환시킴으로써 물성이 다른 몬트모닐롤나이트의 층간화합물을 형성하게 된다. 이러한 층간화합물은 공업적으로 아주 광범위하게 이용되는가 하면, model-systems로서 물질의 거동을 밝혀내는 학문적 연구에 또한 많이 이용되기도 한다. 따라서 본 연구에서는 이러한 몬트모릴로나이트의 층간화합물을 형성하여 여러 상이한 조건하에서의 이들의 거동에 대하여 연구했다. By cation-exchange-reaction long-chain organic cationic tensides can be intercalated in the montmorillonite layer space, and thus intercalations-complexes of montmorillonite with different properties of materials can be obtained. Such intercalations-complexes are finding strong technical appliances in many areas and are also used very often as model-systems for studying behaviors of materials. Therefore in this research intercalations-complexes of montmorillonite with organic cationic tensides ad model-systems were synthesized and their behabiors under various different conditions were studied.

16S rDNA 분석에 의한 잔디생초에 분포하는 셀룰로스 분해세균의 동정

조성준,이용성,김상준,김길용,정병곤,노희명,이건형 한국자연보호학회 2012 한국자연보호학회지 Vol.6 No.1

Population densities of aerobic heterotrophic bacteria by plate counting method were in the range of 3.5 ± 0.2 × 106~1.8 ± 0.7 × 107 cfu g−1 dry wt. from the grasses of Gunsan Country Club which sampled from August to October, 2011. We selected the celluloytic bacteria from aerobic heterotrophic bacteria and identified 6 strains among ninety-six isolates by using 16S rDNA analysis. As a result, four isolates belonged to Firmicute group, two isolates belonged to Gamma-proteobacteria group and Actinobacteria group, respectively. We also analysed the cabon sources utilization patterns of six isolates. D-cellobiose, D-Fructose, D-Galactose, D-Mannose, DMelibiose, D-Psicose, Gentiobiose, Lactulose, L-Arabinose, L-Fucose, Turanose, α-D-Glucose, and α-D-lactose among 95 carbon sources are utilized by all six isolates.

Tailoring Surface Interfacial Interactions for High-χ Fluorine-Containing Block Copolymer Films via Electric Field Alignment

조성준,전승배,전희일,류두열 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1

The interfacial interactions for polystyrene-b-poly(2,2,2-trifluoroethyl acrylate) (PS-b-PTFEA) films were modulated to balance the dissimilar surface tensions between PS and PTFEA, where the Flory-Huggins interaction parameter (χ) of PS-b-PTFEA is above 0.23. A neutral homopolymer substrate and top coat materials are applied where a sub-10 nm perpendicular lamellar morphology is observed with simple thermal annealing process. The balanced interfacial interactions for the block copolymer (BCP) films are tuned by overlying neutral layers using the same monomer of the BCP with a maleic anhydride units. We also demonstrate GISAXS experiments to confirm the orientation of perpendicular lamellae thickness window, which the neutral property turns out to be compositionally asymmetric toward styrene units. Additionally, directed self-assembly (DSA) is conducted by electric field, resulting a long-range uniaxial alignments over 2-um scale.

빅데이터기반의 공공서비스 혁신

조성준 대한산업공학회 2015 대한산업공학회 춘계학술대회논문집 Vol.2015 No.4