쇼핑센터의 전력부문 온실가스 저감에 관한 연구

정진도(Jin-Do Chung),김장우(Jang Woo Kim),임헌천(Heon Cheon Lim),임수영(Soo Young Lim) 한국열환경공학회 2009 한국열환경공학회 학술대회지 Vol.2009 No.추계

화상처리를 이용한 전기트리의 프랙탈 해석

임장섭,정우성,이진 木浦大學校 工業技術硏究所 1995 工業技術硏究誌 Vol.5 No.-

The tree observation tehnique is being highlighted as a reasearch area for deterioration of insulation because of high-voltage power system. Many reseachers make efforts to develop not only diagnosis of aging state but also detection of defects in the initial stage from preventive diagnosis system. For the measurement of tree, image processing is actively studied as a experimental technique of electrical tree, because the conventional directed visual impossible to analyze on the tree degradation area, progressed direction, and tree pattern etc. In this paper, we have developed the tree measuring system using image processing. By using an image processing technique, the tree features which appear immediately after the tree initiation as well as changes in the configuration of the tree can be easily measured and observed than the conventional visual methods.

용융슬래그로부터 합성된 제올라이트 이용한 해수 중의 N, P 제거

임준혁,정진영,이성우,홍성호,김경희,이제근 한국공업화학회 2003 응용화학 Vol.7 No.1

This study examined, as the one way of using zeolite, the about the removal of ammonia nitrogen and phosphorus that cause the eutrophication occurred the adjoining seas.4A type zeolite was used as an adsorbent to remve NH_4-N, PO_4^3-P ion in the artificial seawater. Zeolite is more required than in the fiesh water, under the same conditions, in order to remove NH_4-N in the sea water. The lower the thickness of NH_4-N is in the early stage, the more Freundlich type equation the value of 1./n increases. In case of PO_4^3-P indicated that the removal efficiency was relatively independent of PO_4^3-P concentration. Freundlich parameter 1/n has the value nuder 2. So it shows that absorption is made with relatively ease.

국민학교 자연과 천문분야 내용 분석과 문제점

임청환,정진우 한국교원대학교 과학교육연구소 1993 청람과학교육연구논총 Vol.3 No.1

The purpose of this study is to analyze the contents and problems on astronomical areas in the elementary science textbooks. The results of analysis are as follows; 1. In objective analysis of the elementary science textbooks, completeness of unit was shown 50% in chapters, 67% in sections, and 100% in periods. 2. In inquiry activities, the total number of inquiry tasks are 108, among them observation has much more percentage(30%) than any other task. 3. The total inquiry index of the science textbooks are found about 73.4, this index is higher than 35-50 of NSTA. 4. The openness scale of the science textbooks is found to be scale 2 for all sections.

고정층 활성탄 흡착반응기에서 기상 톨루엔의 흡착특성

임진관,이송우,감상규,이동환,이민규 한국환경과학회 2005 한국환경과학회지 Vol.14 No.1

Adsorption characteristics of toluene vapor, which is one of important source of volatile organic compounds (VOCs), by activated carbon were investigated using a fixed bed adsorption column. The operating parameters such as breakthrough curve, adsorption capacity. mass transfer zone (MTZ), and length of unused bed (LUB) were studied. The experimental results showed that the breakthrough time decreased with increasing inlet toluene concentration and gas flow rate. MTZ and LUB increased with the increase of inlet concentration, gas flow rate, and particle size of activated carbon. The adsorption capacity increased with the increase of inlet toluene concentration, while it decreased with increasing particle size. However, it was kept at constant value regardless of the increase of gas flow rate. Adsorption isotherm of toluene vapor could be represented by the Freundlich adsorption equation fairly well. From the adsorption experiments using some VOC gases such as toluene, xylene, butyl acetate. butanol and acetone, it was also found that the adsorption capacity was higher in the case of gas with higher boiling point and lower vapor pressure.

혈액 투석 환자에서 중심정맥 협착에 대한 스텐트 삽입술 : Wallstent Placement

임대승,노상필,이유선,정승현,김보영,이정우,강정아,김정희,이민수,정준용,최시완,정진옥,성인환,이강욱,신영태 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.1

Stenosis of central vein is a common complication arising after percutaneous subclavian vein catheter insertion performed for temporary vascular access in chronic renal failure patients undergoing hemodialysis. There are several treatment methods for the condition like percutaneous angioplasty(PTA), stent insertion, and surgery, but recent trend is toward PTA and stents. Among the patients diagnosed with chronic renal failure from March 1993 to May 2002 and undergoing hemodialysis through AV fistula, the 14 Patients in whom central vein stenosis arose were selected for the study. A total of 28 percutaneous interventions(5 PTA and 23 stent placement) were performed, and restenosis rate and the time taken till the restenosis in de novo lesions and instant lesions were compared. All 28 cases were operated successfully. The 14 cases that received both anigioplasty and stent placement initially. (de novo lesion : 14 cases), Among the 10 cases with de novo lesion that followed up more than 1 year, 3 cases are currently undergoing hemodialysis without restenosis, and the remaining 7 cases have recurred stenosis with the mean time to restenosis of 10.9 months. In the 7 cases in whom stenosis recurred, 11 interventions were done(instent lesion: 11 cases). 4 of these were using only ballon angioplasty with 100% restenosis rate and the mean time of 3 months until restenosis. The remaining 7 cases were using both balloon angioplasty and stent placement, also with 100% restenosis rate but with the mean time of 12 months until restenosis, which was later than the group receiving only balloon angioplasty. In treating the patients with central vein stenosis, stent placement seems to be more advantageous over PTA in terms of restenosis rate and the mean duration of patency. In the case of instent lesion, inserting the stent for the second time after stenosis recurred lengthened the duration of patency compared to performing balloon angioplasty alone.

감초추출액이 멜라닌세포의 증식과 멜라닌화에 미치는 영향

임덕우,이진우,이무형 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2000 No.-

Background: Licorice has been widely used for its anti-inflammatory action. Recently many studies have revealed that licorice has an inhibitory effect on melanin formation by inhibiting tyrosinase, TRP-1(Tyrosinase-related protein 1) and TRP-2(Dopachrome tautomerase) activity. Most studies have reported that licorice extract inhibits melanogenesis in malignant melanoma cell but there are few reports of the effect of licorice on proliferation and melanization in normal human melanocytes. Furthermore, anti-melanogenetic effect of licorice is different according to the cultivated places. Objective: This study was done to investigate the effects of crude extract(CLE) and oil-soluble extract(OLE) of licorice which is cultivated in China and circulates in Korea on the proliferation and melanization of normal cultured human melanocytes. Methods: CLE(100, 500, 1000㎍/mL) and OLE(1, 10, 100㎍/mL) were added into culture medium respectively. Three days after adding CLE, melanocytes were counted by using hemocytometer, and melanocyte proliferation was measured by MTT and SRB assay. And melanin contents were examined by using spectrophotometer. Melanocytes were counted and melanin contents were measured 2 days and 7 days after adding OLE. Results: In CLE-added groups, the number of melanocytes was significantly lower in experimental groups (500㎍/mL and 1000 ㎍/mL) than in control group(p<0.05). On MTT assay, the proliferation of melanocytes was inhibited significantly in experimental groups(500㎍/mL and 1000㎍/mL) (p<0.05). On SRB assay, the proliferation of melanocytes was inhibited significantly in all experimental groups(p<0.05). This anti-proliferative effect was supposed to be related with the cytotoxic effect of CLE. Melanin contents increased significantly in CLE-added experimental group(500㎍/mL and 1000㎍/mL) than control group(p<0.05). It is considered that the increased melanin contents were caused by strong anti-proliferative effect. Two days after adding OLE, the number of melanocytes had no change in 1㎍/mL-added group, which decreased significantly in 10㎍/mL-added group, All cells were detached from the bottom of culture plate in 100 ㎍/ml-added group. The number had no change in 1㎍/mL-added group, while all cells were detached in 10㎍/mL and 100㎍/mL-added groups 7 days after adding OLE. This means that the concentrations of 10㎍/mL and 100㎍/mL of OLE have cytotoxic effect on melanocyte. Melanin contents decreased significantly on the 2nd day(p<0.05), and decreased slightly on the 7th day in 1㎍/mL OLE-added group. Conclusion: Oil-soluble extract of licorice which is cultivated in China and circulates in Korea has anti-melanogenic effect. Therefore, this material can be used to treat hyperpigmented disorders including melasma.

고교생의 논리적사고력과 과학탐구 기능 사이의 상관관계에 관한 연구

임청환,정진우 한국교원대학교 과학교육연구소 1992 청람과학교육연구논총 Vol.2 No.1

The purpose of this study is to investigate the interrelationships on integrated science process skills and Piagetian cognitive modes for high school students according to the different cognitive reasoning levels. About 509 high school students were randomly selected for the samples of this study. They were identified as concrete, transitional and formal operational stage with the scores of GALT(Group Assessment of Logical Thinking) developed by Roadrangka, Yeaney and Padilla(1982), and TIPS Ⅱ(Test of Integrated Process Skills) developed by Burns, Wise and Okey(1983). The result of this study were showed that about 11.8% of the samples were in the concrete operational stage and about 24.4% of the samples were in the transitional stage, while about 63.8% of them were in the formal operational stage. It was also found that the achivement scores of the science process skills increase in accordance with the cognitive reasoning levels. The value of the correlation coefficient between science process skills and cognitive reasoning abilities was 0.49, which was significant at the 0.05 level. This finding seems to support previous research that the student's cognitive resoning abilities appeared to have influenced student's scores of the science process skills No differences to the logical reasoning ability between male and female students according to each cognitive level were found except formal operational stage.

대형경유차 저공해기술 적용에 따른 나노입자 배출특성

임철수,류정호,엄명도,황진우,김예은 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.2

Diesel engines which emit a lot of PM and NOx have been known as a main air polluter. Especially, diesel particulate matters (DPM) including black smoke are hazardous air pollutants to human health and environment. The nations retaining advanced engine technologies have reinforced emission regulations. To meet these regulations diesel engine manufacturers have developed low-emission diesel engines, aftertreatment equipments, alternative fuel technologies and so on. In this study, particle number concentrations characteristics according to particle size and engine driving conditions were analyzed when these low-emission technologies were applied. There was a tendency of increasing particle number concentrations from heavy-duty diesel engines with increasing engine rpm and load rate. In the cases of CDPF (Catalytic Diesel Particulate Filter), CNG (Compressed Natural Gas) engine and ULSD (Ultra Low Sulfur Diesel) more than 99% of particle number concentration were removed.

감초추출액이 멜라닌세포의 증식과 멜라닌화에 미치는 영향

임덕우,이진우,이무형 경희대학교 2000 慶熙醫學 Vol.16 No.2