야자각계 입상 활성탄의 Acid Black 1 염료 흡착에 대한 평형, 동역학 및 열역학 파라미터의 연구

이동창 ( Dong-chang Lee ),이종집 ( Jong-jib Lee ) 한국공업화학회 2016 공업화학 Vol.27 No.6

본 연구는 흡착제로 야자각계 수증기 활성화 입상 활성탄을 사용하여 Acid Black 1 수용액에서의 흡착 거동과 동역학적, 열역학적 파라미터에 대해 회분식 반응을 통해 조사하였다. 흡착변수로는 pH, 초기농도, 접촉시간, 온도를 사용하였다. pH에 대한 영향을 조사하기 위해 pHpzc 값을 분석한 뒤 pH 3-11 범위에서 제거율을 조사하였다. 흡착평형자료로부터 Langmuir, Freundlich, Temkin, Dubinin-Radushkevich 등온 흡착식에 대한 적합성을 평가하였다. 흡착공정에 대한 동역학적 해석을 통해 유사 1차반응식과 유사 2차반응식에 대한 흡착반응의 일치도를 평가하였다. 열역학적 해석을 통해 엔탈피 변화 값과 활성화에너지 값을 조사하여 이를 통해 흡착공정이 흡열반응인지를 확인하였으며, 엔트로피변화 값과 자유에너지 값을 통해 흡착공정의 자발성을 확인하였다. In this study, the adsorption behavior from aqueous solution as well as kinetic and thermodynamic parameters of Acid Black 1 were investigated through batch reaction using coconut shell based granular steam activated carbon. The effects of various adsorption parameters such as pH, initial concentration, contact time, temperature were studied. To confirm the effect of pH, pHpzc measurements were analyzed followed by measuring removal efficiencies of Acid Black 1 at the pH range from 3 to 11. Experimental equilibrium adsorption data were fitted using Langmuir, Freundlich, Temkin and Dubinin-Radushkevich adsorption isotherm. The conformity of adsorption reaction for pseudo first and second order model were evaluated through kinetic analysis. Values of enthalpy change and activation energy were also investigated through thermodynamic analysis and it was confirmed that the adsorption process was endothermic. The spontaneity of adsorption process was evaluated using the values of entropy and Gibbs free energy changes.

태권도 경기 간 실시한 회복방법이 남자 고등학교 선수의 피로도와 체력에 미치는 영향

이종창 ( Lee Jong-chang ),조현석 ( Cho Hyun-seok ),이만균 ( Lee Man-gyoon ) 국기원 2018 국기원태권도연구 Vol.9 No.3

본 연구의 목적은 태권도 경기 간 회복시간에 실시한 회복방법이 남자 고등학교 선수의 피로도와 체력에 미치는 영향을 규명하는 것이었다. 모든 대상자(n=12)가 4가지의 처치(① 휴식성 회복, ② 운동성 회복, ③ 휴식성 회복+글루코스 섭취, ④ 운동성 회복+글루코스 섭취)에 반복 참여하였다. 각 처치마다 하루에 태권도 경기를 네 차례씩 치렀고, 태권도 경기 간 회복시간에 해당되는 회복 방법을 적용하였으며, 각 처치마다 피로도와 체력을 측정한 뒤 처치 간, 그리고 시기 간에 비교하여 다음과 같은 결과를 얻었다. 1) 2경기 전부터 4경기 전 시점까지 휴식성 회복처치에서 안정시와 경기 후 혈중 젖산농도가 가장 높게 나타났고, 운동성 회복+글루코스 섭취처치에서 가장 낮게 나타났다. 2) 2경기 후부터 4경기 후 시점까지 휴식성 회복+글루코스 섭취처치와 운동성 회복+글루코스 섭취처치의 혈중 글루코스농도가 다른 두 처치에 비하여 유의하게 높았고, 3경기 후 시점부터 운동성 회복+글루코스 섭취처치의 수치가 가장 높게 나타났다. 3) 4경기 후 시점에서 휴식성 회복+글루코스 섭취처치와 운동성 회복+글루코스 섭취처치의 무산소성 최고파워와 제자리수직뛰기가 다른 두 처치에 비하여 유의하게 높게 나타났다. 그러나 민첩성에서는 처치와 시기의 상호작용이 유의하게 나타나지 않았다. 이상의 결과를 종합해보면, 하루에 여러 차례 진행되는 태권도 경기 간 회복시간에 운동성 회복과 글루코스 섭취를 병행하는 것이 피로의 회복, 탄수화물 고갈의 예방, 그리고 무산소성 운동능력과 순발력의 유지에 가장 효과적이라고 결론지을 수 있다. This study was designed to investigate the effects of types of recovery conducted between Taekwondo games on fatigue level and physical fitness in male high school players. Twelve Taekwondo players participated in four trials (① rest recovery, ② active recovery, ③ rest recovery+glucose ingestion, ④ active recovery+glucose ingestion). While four games were held in a day of each trial, assigned treatment was applied during recovery phase between the games. In each trial, fatigue level and physical fitness were measured and compared among trails. Main results of the study were as follows: 1) From the time before 2nd game to before 4th game, blood lactate at rest and after each game was the lowest in rest recovery trial and was the highest in active recovery+glucose ingestion trial. 2) From the time after 2nd game to after 4th game, blood glucose in rest recovery+glucose ingestion trial and active recovery+glucose ingestion trial was higher than other two trials. From the time after 3rd game, blood glucose in active recovery+glucose ingestion trial was the highest. 3) After the 4th game, anaerobic power and standing vertical jump in rest recovery+glucose ingestion trial and active recovery+glucose ingestion trial was higher than other two trials. Agility showed no significant interaction between treatment and time. It was concluded that the combination of active rest and glucose ingestion during recovery phase between the games while several games were held in a day would be beneficial for overcoming fatigue, prevention of glycogen depletion, and maintenance of muscular power throughout the games.

차량 네트워크 시스템의 결함 허용을 위한 IEEE 1451 기반 중복 CAN 모듈의 구현

이종갑(Jong Gap Lee),김만호(Man Ho Kim),박지훈(Jee Hun Park),이석(Suk Lee),이경창(Kyung Chang Lee) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.7

As many systems depend on electronics in an intelligent vehicle, concern for fault tolerance is growing rapidly. For example, a car with its braking controlled by electronics and no mechanical linkage from brake pedal to calipers of front tires (brake-by-wire system) should be fault tolerant because a failure can come without any warning and its effect is devastating. In general, fault tolerance is usually designed by placing redundant components that duplicate the functions of the original module. In this way a fault can be isolated, and safe operation is guaranteed by replacing the faulty module with its redundant and normal module within a predefined interval. In order to make in-vehicle network fault tolerant, this paper presents the concept and design methodology of an IEEE 1451 based dual CAN module. In addition, feasibility of the dual CAN network was evaluated by implementing the dual CAN module.

현대광공학 개론 V : 광전자

이종창,Lee, Jong-Chang 한국광학회 2007 광학과 기술 Vol.11 No.2

CaCO₃ 를 함유한 폐제지슬러지의 유동층 연소로에서 소성반응

홍성창(Sung Chang Hong),이종일(Jong Il Lee),도동섭(Dong Sup Doh) 大韓環境工學會 1995 대한환경공학회지 Vol.17 No.5

현대광공학 개론 X : 광통신

이종창,Lee, Jong-Chang 한국광학회 2007 광학과 기술 Vol.11 No.3

은 나노입자가 분산된 Honeycomb-patterned 수지 합성에 대한 연구

이동창(Dong Chang Lee),이종집(Jong Jib Lee) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.2

Poly(N-vinylcarbazole) (PVK)-cellulose triacetate (CTA) 복합체를 합성하고, 필름에 기공을 형성시킨 뒤, 화학적 환원법을 통해 은 나노입자를 부착하는 것을 연구하였다. PVK-CTA 복합체는 CTA-chloroform 용액에서 iron(III) chloride를 산화제로 사용하여 N-vinylcarbazole을 중합시켜 복합체를 합성하였고, 얻어진 복합체를 습한 환경에서 휘발성용매로 적셔 수증기를 적용하여 macropore가 균일하게 형성된 구조인 Honeycomb-pattern을 형성시켰다. 이후 환원제로 Tetrathiafulvalene (TTF)와 분산제로 polyvinylpyrrolidone (PVP)를 사용하여 화학적 환원법을 이용해 은 나노입자를 Honeycomb-pattern이 형성된 복합체 표면에 부착시켰다. FT-IR과 UV-Vis spectrometer을 이용하여 복합체의 형성여부를 확인하였고, N-vinylcarbazole의 함량을 달리하여 중합한 뒤 복합체의 열 분해도를 측정하였다. Scanning electron microscope (SEM)을 통해 복합체 표면에 형성된 기공의 균일도와 부착된 은 나노입자들의 분산성을 분석하였으며, 환원제, 분산제, 전구체 용액의 농도를 달리하여 은나노입자의 분산성을 확인하였다. Silver nanoparticles were attached by chemical reduction after synthesizing a porous PVK-CTA complex. The PVK-CTA complex was synthesized by polymerizing N-vinylcarbazole in a CTA-chloroform solution using iron(III) chloride as an oxidizing agent and a honeycomb-pattern with uniformly formed macropores was formed by applying steam to the complex surface soaked with a volatile solvent under humid conditions. Using TTF as a reducing agent and PVP as a dispersant, silver nanoparticles were attached on the Honeycomb-pattern complex surface through chemical reduction. The formation of the complex was confirmed by FT-IR and UV-Vis spectrometry, and the degree of thermal decomposition of the complexes was analyzed after N-vinylcarbazole was polymerized by varying its concentration. The uniformity of the pores on the composite surface and the dispersibility of the attached silver nanoparticles were investigated by SEM. The dispersibility of the silver nanoparticles was also analyzed by varying the concentrations of reducing agent and dispersant and precursor.

온실재배 풋고추의 소비수량

이근후 ( Lee Keun Hoo ),이종창 ( Lee Jong Chang ),윤용철 ( Yoon Yong Cheol ),서원명 ( Suh Won Myung ) 한국농공학회 2000 한국농공학회 학술대회초록집 Vol.2000 No.-

This study was carried out to investigate the water requirement of green peppers which are cultivated in a greenhouse under the different soil water conditions. The meteorological conditions during the experiment period was not predominantly different from the conditions in a normal year. The highest leaf area per plant, plant height, and yield were 6,143㎠/plant, 107cm, and 751g/plant, respectively. And daily variation of water requirements of green peppers ranged from 30 to 1,250g/d/plant which was fluctuated with significant difference. Total water requirements per plant which cultivated under the soil water conditions with different saturation ratios were 23,619g for P100, 43,044 for P80, and 2915g for P60, respectively. There were close correlation between plant height and water requirements. Low correlations were found between greenhouse ambient temperature and water requirement, while significant linear regression was shown between both of humidity and solar radiation and water requirement.

나림광산 수계의 토양과 퇴적물에 관한 지구화학적 특성: 중금속 원소의 분산, 부화 및 기원

이찬희,이현구,이종창,Lee, Chan Hee,Lee, Hyun Koo,Lee, Jong Chang 대한자원환경지질학회 1998 자원환경지질 Vol.31 No.4

Geochemical characteristics of environmental toxic elements at the Narim mine area were investigated on the basis of major, minor, rare earth element geochemistry and mineralogy. Ratios of $Al_2O_3/Na_2O$ and $K_2O/Na_2O$ in soils and sediments range from 11.57 to 22.21 and from 1.86 to 3.93, and are partly negative and positive correlation against $SiO_2/Al_2O_3$ (3.41 to 4.78), respectively. These suggested that sediment source of host granitic gneiss could be due to rocks of high grade metamorphism originated by sedimentary rocks. Characteristics of some trace and rare earth elements of V/Ni (0.33 to 1.95), Ni/Co (2.00 to 6.50), Zr/Hf (11.27 to 53.10), La/Ce (0.44 to 0.55), Th/Yb (4.07 to 7.14), La/Th (2.35 to 3.93), $La_N/Yb_N$ (6.58 to 13.67), Co/Th (0.63 to 2.68), La/Sc (3.29 to 5.94) and Sc/Th (0.49 to 1.00) are revealed a narrow range and homogeneous compositions may be explained by simple source lithology. Major elements in all samples are enriched $Al_2O_3$, MgO, $TiO_2$ and LOI, especially $Fe_2O_3$ (mean=7.36 wt.%) in sediments than the composition of host granitic gneiss. The average enrichment indices of major and rare earth elements from the mining drainage are 2.05 and 2.91 of the sediments and are 2.02 and 2.60 of the soils, normalizing by composition of host granitic gneiss, respectively. Average composition (ppm) of minor and/or environmental toxic elements in sediments and soils are Ag=14 and 1, As=199 and 14, Cd=22 and 1, Cu=215 and 42, Pb=1770 and 65, Sb=18 and 3, Zn=3333 and 170, respectively, and extremely high concentrations are found in the subsurface sediments near the ore dump. Environmental toxic elements were strongly enriched in all samples, especially As, Cd, Cu, Pb, Sb and Zn. The level of enrichment was very severe in mining drainage sediments, while it was not so great in the soils. Based on the EPA value, enrichment index of toxic elements is 8.63 of mining drainage sediments and 0.54 of soils on the mining drainage. Mineral composition of soils and sediments near the mining area were partly variable being composed of quartz, mica, feldspar, amphibole, chlorite and clay minerals. From the gravity separated mineralogy, soils and sediments are composed of some pyrite, arsenopyrite, chalcopyrite, sphalerite, galena, goethite and various hydroxide minerals.

지각된 서비스품질이 서비스가치, 관람만족, 재관람의도 및 타인추천의도에 미치는 영향

김용만(Kim Yong-Man),이종창(Lee Jong-chang),서희정(Seo Hee-Jung) 한국스포츠산업경영학회 2003 한국스포츠산업경영학회지 Vol.8 No.3

이 연구의 목적은 프로야구단의 지각된 서비스품질이 서비스가치, 관람만족 재관람의도 그리고 타인추천의도에 미치는 영향을 규명하는 데 있다. 이러한 목적을 달성하기 위해 프로야구를 관람하기 위해 경기장을 직접 찾은 4개 구단(LG, 두산, SK, 현대)의 홈팀 관중을 대상으로 400부를 표본추출한 후 SPSSWIN Ver. 10.0을 이용하여 빈도분석과 회귀분석을 하였다. 자료처리 결과를 보면 다음과 같다. 첫째, 지각된 서비스품질의 하위요인 중 시스템적서비스, 인적서비스는 서비스가치에 영향을 미치는 것으로 나타났다. 그러나 물적서비스는 유의한 영향을 미치지 않는 것으로 나타났다. 둘째, 지각된 서비스품질의 하위요인인 물적서비스, 시스템적서비스 그리고 인적서비스 모두 관람만족에 영향을 미치는 것으로 나타났다. 셋째, 지각된 서비스품질의 하위요인 중 인적서비스만이 재관람의도에 유의한 영향을 미치는 것으로 나타났다. 넷째, 지각된 서비스품질의 하위요인 중 물적서비스와 인적서비스는 타인추천의도에 영향을 미치는 것으로 나타났다. 그러나 시스템적서비스는 유의한 영향을 미치지 않는 것으로 나타났다. 다섯째, 서비스가치와 재관람의도와 타인추전의도의 관계에서 서비스가치가 재관람의도와 타인추천의도에 통계적으로 유의한 영향을 미치는 것으로 나타났다. 여섯째, 서비스가치와 관람만족의 관계에서 서비스가치가 관람만족에 통계적으로 유의한 영향을 미치는 것으로 나타났다. 일곱째, 관람만족과 재관람의도 및 타인추천의도의 관계에서 관람만족이 재관람의도와 타인추천의도에 통계적으로 유의한 영향을 미치는 것으로 나타났다. The purpose of this research was to examine the influence of perceived service quality (PSQ) of a professional baseball team on service value (SV), spectatorship satisfaction(SS), repurchase intention(RPI) and recommendation intention(RI). In order to achieve this objective, 400 samples were selected from spectators in favor of home teams of 4 clubs (LG, Doosan, SK, and Hyundai) who came to watch professional baseball games, and then Frequency analysis and Regression analysis were done using SPSSWIN Ver. 10.0. The results are as follows: First, systematic service and personal service among down level services of the perceived, service quality appear to have influence on SV but materialistic service appears not to have significant influence. Second, all services such as systematic service, personal service, and materialistic service, which are level factors of the perceived service quality appear to have SS. Third, personal service only among down level factors of the perceived service quality appears to have significant influence on RPI. Fourth, personal service and materialistic service among down level factors of the PSQ appear to have influence on RI but materialistic service appears not to have significant influence. Fifth, SV appears to have statistically significant influence on RI in the relationship between SV, RPI, and RI. Sixth, SV appears to have statistically significant influence on RPI as well as RI in the relationship between SV and SS. And lastly and seventhly, SS appears to have statistically significant influence on RPI and intention to recommend to others in the relationship between SS, RPI, and RI.