재순환방식 튜브형 전해모듈시스템을 이용한 안료폐수의 전기화학적 산화

정종식(Jong Sik Jeong) 대한환경공학회 2016 대한환경공학회지 Vol.38 No.8

본 연구에서는 안료폐수 중에 포함되어 있는 유기물질과 질소를 처리함으로써 재순환방식을 이용한 튜브형 전해모듈시스템의 적용 가능성을 평가하였다. 튜브형 전해모듈은 내부 봉형 양극과 외부 튜브형 음극으로 이루어져있다. 양극의 재질은 RuO2로 전착된 티타늄이었고 음극의 재질은 스테인리스 스틸이었다. 재순환형 튜브형 전해모듈시스템에서 오염물질의 제거율은 유량이 감소할수록 그리고 전류밀도가 증가할수록 높아졌다. 전해모듈시스템에서 체류시간이 180분일 때 염소산이온의 농도는 382.4~519.6 mg/L로 나타났다. 본 연구에서 사용한 재순환방식을 이용한 튜브형 전해모듈시스템에서 염소산이온의 생성은 전기화학적 산화의 중요한 인자 중의 하나이다. Bench scale의 재순환방식 튜브형 전해모듈시스템에서 전력량을 4,500 C/dm<SUP>2</SUP>으로 공급하였을 경우 CODMn은 89.6%, CODCr은 67.8%, T-N은 96.8% 그리고 색도는 74.2%가 제거되었으며, 이 때 에너지 소모량은 5.18 kWh/m<SUP>3</SUP>이었다. The objective of this study was to evaluate the application possibility of tube type electrolysis module system using recirculation process through removal organic matters and nitrogen in the pigment wastewater. The tube type electrolysis module consisted of a inner rod anode and an outer tube cathode. Material used for anode was titanium electroplated with RuO2. Stainless steel was used for cathode. It was observed that the pollutant removal efficiency was increased according to the decrease of flowrate and increase of current density. When the retention time in tube type electrolysis module system was 180 min, chlorate concentration was 382.4~519.6 mg/L. The chlorate production was one of the major factors in electrochemical oxidation of tube type electrolysis module system using recirculation process used in this research. The pollutant removal efficiencies from the bench scale tube type electrolysis module system using recirculation operated under the electric charge of 4,500 C/dm<SUP>2</SUP> showed the CODMn 89.6%, CODCr 67.8%, T-N 96.8%, and Color 74.2%, respectively and energy consumption was 5.18 kWh/m<SUP>3</SUP>.

세제세척 후 용기재질과 헹굼시간에 따른 계면활성제 잔류량 변화

정종신(Jong Shin Jeong),정연훈(Yon Hun Jeong),정승우(Seung Woo Jeong) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.12

일상생활과 실험실에서 널리 사용하는 대표적 용기를 선정하여 세제세척 및 헹굼 후 용기에 잔류하는 계면활성제의 양을 정량화하였다. 일반적 세제 사용량인 8 mL를 수세미에 묻혀 용기를 닦은 후 흐르는 물에 7초 및 15초간 헹궈주었다. 설거지가 끝난 용기에 증류수 100 mL를 붓고 흔들어 그릇에 남아 있는 계면활성제를 추출하여 분석하였다. 7초 헹굼과정을 거친 후 용기에 잔류하는 계면활성제 농도는 뚝배기 4.68 mg/L, 후라이팬 1.22 mg/L, 유리그릇 0.57 mg/L, 플라스틱 용기 0.25 mg/L 순으로 모든 용기에서 계면활성제가 검출되었다. 그러나 15초 헹굼과정을 거친 경우, 뚝배기에서만 계면활성제가 여전 히 검출되었고 다른 용기에서는 검출되지 않았다. 실험결과 다공성매체로 이루어진 재질일수록 계면활성제의 잔류가 많은 것으로 나타났다. 세제로 식기를 세척할 경우 충분한 헹굼과정이 있어야 세제 섭취를 줄일 수 있을 것으로 판단된다. 특히 많은 이공계실험실에서 실험실 용기가 세제세척 후 충분히 헹궈지지 않는다면 잔류 계면활성제가 이후 실험 결과에 지대한 영향을 미칠 수 있다. This study selected representative popular bowls used in daily life and laboratory and investigated the amount of residual surfactant resided in the bowls that were dish-washed. The bowls were washed by a scourer soaking 8 mL-detergent and then rinsed by flowing water for 7 or 15 seconds. One hundred milliliter of distilled water was placed in the washed-bowls to extract residual surfactant on the bowl surface and then analysed. All washed-bowls included residual surfactant after 7 second-rinsing. Residual surfactant concentrations in Ttukbaegi (earthen bowl), flying pan, glass bowl, and plastic bowl were 4.68, 1.22, 0.57, and 0.25 mg/L, respectively. However, the 15 second-rinsing showed that surfactant was detected only in Ttukbaegi and other bowls were clean. The results showed that surfactant would reside on the porous or rough surface of the bowl even after final rinsing. This study imply that all bowls and glasses should be throughly rinsed after detergent-washing to reduce continuos ingestion. Furthermore, residual surfactant in the glassware of laboratory may significantly affect experiment results.

원예용 폐배지를 재활용한 혼합배지에서 분국화 ‘Pink Pixie Time’의 생육과 개화

정종운(Jong Woon Jeong),정병룡(Byoung Ryong Jeong) 한국원예학회 2001 한국원예학회 학술발표요지 Vol.2001 No.5

삽수 길이, 소엽수 및 삽수 채취부위에 따른 절화장미 ‘Red Sandra’와 ‘Little Marble’의 발근과 생장

정종운(Jong Woon Jeong),황승재(Seung Jae Hwang),박수민(Su Min Park),정병룡(Byoung Ryong Jeong) (사)한국생물환경조절학회 2007 생물환경조절학회지 Vol.16 No.2

본 실험은 장미 삽수의 조제방법이 발근과 발근 후 생육에 미치는 영향을 알아보기 위하여 수행하였다. 실험재료로는 Rosa hybrida ‘Red Sandra’와 ‘Little Marble’ 두 품종을 사용하였다. 삽수 길이를 달리한 실험은 ‘Red Sandra’는 4, 7, 10 ㎝, ‘Little Marble’ 은 3, 5, 7 ㎝로 처리하였다. 소엽수를 달리한 실험은 삽수당 소엽 5매엽을 0, 2, 4, 또는 5매 남겼다. 삽수 채취부위를 달리한 실험은 꽃봉오리로부터 소엽 5매엽을 첫 마디로 하여 마디별 1~2, 3~4, 5~6, 7~8마디로 4처리하였다. 발근과 생장에 있어 삽수 길이는 두 품종 모두 7 ㎝가 좋았다. 발근률에 있어 소엽을 5매 모두 남기고 1~2마디를 삽수로 이용시 두 품종 모두 좋은 결과를 나타냈다. An experiment was conducted to measure rooting and growth of cuttings of rose as affected by cutting length, number of leaflets and cutting position. Test plants were two cultivars of Rosa hybrid a ‘Red Sandra’(standard) and ‘Little Marble’(miniature). Cutting length was 4, 7 or 10 ㎝ for ‘Red Sandra’ and 3, 5 or 7 ㎝ for ‘Little Marble’. The number of leaflets left on the five-leaflet leaf was 0, 2, 4 or 5. The cutting position on the stem was between 1~2, 3~4, 5~6 or 7~8 nodes from the shoot tip, which have five leaflet leaves. The most efficient cutting length was 7 ㎝ in both cultivars. Treatment with all leaflets left and cutting position at 1~2 nodes resulted in good rooting ratio for both cultivars.

분말야금으로 제작된 M2 공구강과 Cu 간 기능성 경사 복합재의 물성 평가

정종설(Jong-Seol Jeong),신기훈(Ki-Hoon Shin) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.4-3

의정부시 재래시장 활성화 방안에 관한 연구

정종식 ( Jong Sik Jeong ),김영민 ( Young Min Kim ) 한국유통정보학회 2007 유통정보학회지 Vol.10 No.3

배지의 종류와 부피가 절화 장미 ‘Red Sandra’와 ‘Little Marble’ 삽목시 발근 및 생장에 미치는 영향

정종운(Jong Woon Jeong),김경희(Gyeong Hee Kim),황승재(Seung Jae Hwang),박수민(Su Min Park),정병룡(Byoung Ryong Jeong) (사)한국생물환경조절학회 2005 생물환경조절학회지 Vol.14 No.2

본 연구는 배지의 종류 및 부피가 절화 장미의 발근과 발근 후 생육에 미치는 영향을 알아보기 위하여 수행하였다. 실험은 유리온실의 철재 베드에 높이 1.5m의 아치형 터널을 설치하고 습도유지를 위하여 fog(200sec./5min. or 100sec./5min) 가습하고, 삽목초기에 차광률 55%의 한랭사로 차광하였다. 실험재료는 Rosa hybrida ‘Red Sandra’와 ‘Little Marble' 두 품종을 사용하였다. 배지의 종류에 따른 발근 차이를 알아보기 위하여 10가지 배지(토실이 상토, 암면큐브, phenolic foam, perlite, vermiculite, 또는 perlite와 peatmoss 1 : 1, perlite와 coir 1 : 1, perlite와 rockwool 1 : 1, rockwool과 peatmoss 1 : 1, rockwool과 coir 1 : 1, v/v)를 준비하여 삽목하였다. 발근배지의 부피에 따른 발근 및 생육의 차이를 알아보기 위하여 3가지의 배지(토실이 상토, 암면큐브, phenolic foam)를 각각 3가지 부피(3 × 3 × 3cm, 5 × 5 × 5cm, 7 × 7 × 7cm)에 삽목하였다. 배지의 종류를 달리한 실험은 두 품종 모두에서 Rockwool 1: Peatmoss 1 배지에서 발근과 생육에서 가장 좋은 결과가 나타났으며, 배지의 부피에 따른 발근율과 모든 생육은 배지의 용적이 커질수록 좋았다. Experiments were conducted to measure rooting and growth of rose cuttings as affected by medium composition and volume. Rosa hybrid a 'Red Sandra' and 'Little Marble' were used as test plants. For medium composition test, rockwool, phenolic foam, perlite, vermiculite, peatmoss, coir and a commercial medium (Tosilee medium) were applied in single or mixed forms on the propagation bed with fog (200 sec./5 min.) installed to control the humidification time. 'Red Sandra' and 'Little Marble' cuttings were planted in 16-cell plastic pots and 72-cell plug trays, respectively. For the medium volume test, 72-cell plug trays and 16-cell or 9-cell plastic pots were used. Cuttings with an uniform node with a five-leaflet leaf was soaked in a 500 ㎎ㆍL?¹ IBA solution for 30 sec. A fogging system installed on the propagation bed was used for (100 sec./5 min.). Rockwool 1 : peatmoss 1 (v/v) was the most effective on growth and rooting for both cultivars and high volume of Tosilee medium and rockwool were most effective media for both cultivars.

Online Judge를 활용한 문제해결교육

정종광(Jong kwang Jeong) 한국컴퓨터교육학회 2021 한국컴퓨터교육학회 학술발표대회논문집 Vol.25 No.1(B)

일 정신병원의 알코올리즘 치료 프로그램의 중도 퇴원 환자들의 특성

정종일(Jong-Il Jeong),한우상(Wou-Sang Han),전미경(Mee-Kyung Jun),이기원(Gi-Won Lee),김태우(Tae-Woo Kim),김진영(Jin-Young Kim),신경철(Kyung-Chul Shin) 한국중독정신의학회 2004 중독정신의학 Vol.8 No.2

Objective:This study was performed to compare the sociodemographic, clinical variables, self-efficacy, drinking motive, personality characteristics such as impulsivity, sensation-seeking, and insight between the completion group and dropout group. Subjects and Methods:Subjects served for the study were 63 Korean alcoholic patients who participated in an alcoholism treatment program. All subjects were assessed using the Seoul National Mental Hospital Alcoholism Screening Test, the alcohol use inventory, the drinking motive questionnaire, the Barratt impulsivity scale, the Zuckerman sensation seeking scale, the self-efficacy scale, and the Hanil Alcohol Insight Scale. Results:In summary, the results of this study were as follows:1) 29 of the 63 subjects were dropped out, so the dropout rate was 46.1.%. 2) The numbers of patients who completed program was significantly higher among patients of semivoluntary admission than among patients of either voluntary or involuntary admission. 3) There was a relative tendency, not so prominent in a statistical sense, that the drinking style is more severe in the dropout group, 4) The incident of alcohol-related medical diseases was significantly higher in the dropout group than in the completion group. 5) The number of patients who completed the program was significantly higher in the ‘fair insight group’ than in either the ‘poor insight’ or ‘good insight group’. 6) In the dropout group, the scores of all drinking motives were higher than in the completion group. It was especially noted that the enhancement and conformity motive scores were significantly higher in the dropout group than in the completion group. 7) In the completion group, there were no correlations among drinking motives, AUI subscales, and HAIS score. However, in the dropout group, each drinking motive correlated with the AUI subscales in a different pattern; additionally, the coping motive correlated with the HAIS score. 8) The most common reasons noted for dropout were psychosocial ones, lack of interest in the program, and difficulties to follow the program. Conclusions:Between the completion group and dropout group, there were some differences in the mode of admission, drinking style, alcohol-related medical diseases, insight level, drinking motives and in their correlation pattern with the AUI subscales and HAIS scores. Considering these characteristics and the reasons of dropout, we can improve future treatment program adherence.

CNT 부착 탄소부직포를 삽입한 [0₅/90₅/0₅] 탄소섬유 복합적층판의 압입 특성

정종설(Jong-Seol Jeong),이규림(Kyulim Lee),설진선(Jinseon Seol),정성균(Seong kyun Cheong) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11