하수관거 I/I 분석 프로그램 개발 및 구리시 관내 하수처리구역에 적용

황병기,김경원,정효준 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4

A program was developed to compute infiltration and inflow analysis, and GUI was designed and added in the computational modules for a better understanding and convenient usage for users, named SM-Sewer. The system consists of four modules such as environmental database module for spatial data and their attribute data, filtering module for irregular data, missing data or outllers, I/l analysis module for continuously measured flow data, management module for I/l analyzed results. The modules were integrated using Visual Basic language under Windows Me environment for PC with a management panel, including menu bars, button bars, and tool bars. Using SM-Sewer, the system developed in this study, we performed I/l analysis for wastewater treatment areas of Guri city. According to the results of the analysis, ratio of infiltrated flow to total flow for station Guri-3 takes up 30% and was the highest among the 6 stations. To determine the rank for rehabilitation of sewer system, infiltration rate was computed by dividing by mean diameter and total length of sewer for infiltration. The analysed results show Guri-1 ranked as the first since the mean diameter and total length was large enough compared to the amount of infiltration. Accordingly, rehabilitation program for sewer should be gradually proceeded reflecting the rank determined based on the result of infiltration rate.

艾灸가 家兎의 筋損傷에 미치는 影響

黃炳泰,羅昌洙,黃祐準 圓光大學校 韓醫學硏究所 1992 원광한의학 Vol.2 No.1

To know that how be effected muscle injury by moxibustion treatment, we have measured the changes in concentration of electrolytes(K^+, Na^+, Cl^-), activity of LDH and CPK from blood serum after complete compression with rubber tourniquet around the femoral area of rabbit. And we also examined effects of moxibustion applied to a meridian point Jog Sam Ri(S 36), Kan Soo(B18) on changes of concentration of electrolytes (K^+, Na^+, Cl^-), activity of LDH and CPK from blood serum at 30, 60, 90 minutes and 18 hours after release of tourniquet. The results obtained from this study were as follows; 1. Among the concentration of electrolytes, that of K^+ in B 18 group at all times for blood serum has shown a significant increase than in control group, that of Cl^- in S 36 and B 18 group at 18 hours for blood serum has shown a significant decrease than in control group. 2. The activity of LDH in B 18 group for blood serum has shown a significant decrease compared with control group, but in s 36 group has not shown a significant decrease compared with control group. 3. The activity of CPK in B 18 group for blood serum has shown a significant decrease compared with control group, but in S 36 group has shown a increase compared with control group. According to the above results, we have identified that moxibustion can recover muscle injury, and have considered that better effect upon in B18 than in S 36.

학교 경제교육의 교수ㆍ학습 모형 및 방법에 관한 반성적 고찰

최병모,박형준,김경모,황상주 한국경제교육학회 2004 경제교육연구 Vol.11 No.1

放射線 撮影에 의한 命門과 "與臍平"의 比較 觀察

金炳洙,權五燮,黃祐準 한국전통의학연구소 1998 한국전통의학지 Vol.8 No.2

This research was studied whether umbilicus level of belly is to same Gv4(命門) level of back or not. we know that Gv4(命門) is located at L2-L3. The survey was done on 50 case of low back pain with L-spine X-ray. The resurts obtained here were as follows: 1. Umbilicus level of belly is to same L4 body level of back.(52%) 2. Umbilicus level of belly is to same L4-L5 level of back.(30%) 3. Umbilicus level of belly is to same L3-L4 level of back.(10%) 4. Umbilicus level of belly is to same L5 body back.(8%) As you see on the above results, umbilicus level of belly is not to same Gv4(命門) level of back.

TiN 코팅이 전기도금한 교정용 스테인레스스틸 선재의 세포독성에 미치는 영향

최준규,조진형,황현식,박병주 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.4

This study was performed to investigate whether TiN coating could reduce the cytotoxicity of electroplated orthodontic stainless steel wire which had been known to be cytotoxic. Nickel plating was done on stainless steel wire using a electroplating technique. Some of the electroplated wires were coated by TiN film and 4 groups of specimen were prepared (Non-coated electroplated wire, TiN coated electroplated wire, Titanium which was known to have no cytotoxicity, Copper which was known to have high cytotoxicity). Each wire was incubated for 72 hours on the medium. The release of the metal ion was measured by ICP-AES. The incubated medium was diluted 75 %, 50%, 25 % and added on each microplate with Balb/c 3T3 mouse fibroblast for MTT analysis and compared with medium only. Through the measuring of the change in absorbency value of each wire group and the difference of absorbency value according to change of dilution, following results were obtained. 1. The results of ICP-AES analysis showed that lots of nickel ions were isolated from non-coated wires but not isolated from TiN coated wires. 2. The inverted microscope showed that there was a decrease in cell count in non-coated wires but no significant change in TiN coated wires. 3. The results of MTT analysis showed that there was no difference in the absorbency value between TiN coated wires and medium and between titanium and medium but the absorbency value of non-coated wires and copper were lower than that of medium only at all dilution and showed statistically significant differences(p<0.001). 4. Assessment as per ISO 10993, part 5, non-coated wires and copper investigated corresponded to "moderately cytotoxic" and "highly cytotoxic" ; whereas titanium and TiN coated wires were alloted to "non-cytotoxic". The results of the present study indicate that the cytotoxicity of the electroplated orthodontic wire can be changed from "moderately cytotoxic" to "nontoxic" by TiN coating and electroplated wire can be used clinically without the concern of cytotoxicity.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

주요우울증이 근로자의 생산성에 미치는 영향 : WHO-HPQ(Health and Work Performance Questionnaire)를 이용한 예비연구

김원,황태연,함병주,이준석,최병휘,김세주,서용진,강은호,우종민 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

Objectives : Major depressive disorder (MDD) causes patients' distress and makes socioeconomic burden, both directly and indirectly. We used the concept of lost productive time (LPT) to estimate the indirect costs and calculated both absenteeism and presenteeism among workers with MDD. Mcthods : Depression group was recruited from workers visiting psychiatric outpatient clinic who had MDD without major physical or mental disorders (N= 106). Age and sex matched healthy control group was also recruited through advertisement (M=100). All participants completed a interview using WHO Health and Work Performance Questionnaire (HPQ), Job Stress Measurement Scale for Korean Employees, and Hamilton Rating Scale for Depression. Statistical analysis was performed with independent t-test or χ² test as characteristics of values (p=0.05). Results : The number of absence (0.94-day/month vs. 0.10-day/month, P=0.015) andthe numberofearly leaving (2.56-day/month vs. 0.24-day/month, P<0.001) were significantly higher in the depression group. Depression group evaluated their Perfor-mance level much lower than controls with significant value (5.16 vs. 7.62, P<0.001). In addition, depression group estimated their performance level during the last 4 weeks lower compared to the level of past 1-year (5.16 vs 6.63, P<0.001). The estimated costs of absenteeism in depression group were higher than controls by 2,520,000 Korean Won per year, and those of presenteeism were also higher by 4,880,000 Korean Won per year. The total costs of LPT in depression group were higher than controls by 7,400,000 Korean Won, which corresponds to 26% ofmean annual salary. In addition, the level of occupational stress, such as high demand and interpersonal conflict, was higher in the depression group. Conclusion : Major depressive disorder costs substantial productivity loss to workers and their company. Presenteeism imposes more time cost than absenteeism. Effectiveness trials are needed to devise cost-effective programs for the early detection and treatment of depression at the workplace.

전도성 고분자 센서 어레이를 이용한 휘발성 유기 화합물 가스 인식

이경문,주병수,유준부,황하룡,이병수,이덕동,변형기,허증수 한국센서학회 2002 센서학회지 Vol.11 No.5

휘발성 유기 화합물 가스(Volatile Organic Compounds)를 인식하고 분석하기 위하여 전도성 고분자 센서어레이를 이용한 시스템을 제작하였다. Polypyrrole와 Polyaniline을 화학중합법으로 센서에 전도성고분자막을 형성하였고 이를 통해 VOC 검지용 센서 어레이를 제작하였다. 센서어레이로부터 측정되는 다차원 데이터는 주성분분석법(PCA)과 RBF(Radial Basis Function Network)을 이용하였다. 제안된 시스템으로 VOCs 가스를 인식하는데 있어서 RBF Network이 PCA방식보다 더욱 효율적인 것으로 판단되었다. We fabricated gas recognition system using conducting polymer sensor array for recognizing and analyzing VOCs(Volatile Organic Compounds) gases. The polypyrrole and polyaniline thin film sensors which were made by chemical polymerization were employed to detect VOCs. The multi-dimensional sensor signals obtained from the sensor array were analyzed using PCA(principal component analysis) technique and RBF(radial basis function) Network. Throughout the experimental trails, we confirmed that RBF Network is effective than PCA technique in identifying VOCs.

용접공에서 혈중 중금속 농도와 혈장중 Malondialdehyde, α-tocopherol 및 적혈구내 Superoxide Dismutase 활성도에 관한 연구

이원진,장성훈,황천현,천병철,김해준 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.2

We investigated the association between the oxidative stress and the concentration of heavy metals in blood among welders. The study subjects were male manual CO₂welders(N=127) exposed to several heavy metals. The age distribution was from 20 to 63(GM=33.7) and the geometric mean(GM) of work duration was 4.2 years. We analyze the level of blood lead, cadmium, manganese and chromium which was related with the oxidative stress in the animal studies. Blood selenuim, plasma malondialdehyde(MDA), plasma α-tocopherol and erythrocyte superoxide dismutase(SOD) were analyzed as biological markers of the oxidative stress. The results of univariate analysis showed that the plasma MDA was significantly correlated with α-tocopherol(r=0.327) and blood selenium(r=0.313) concentration. But we could not find out any relationship between the erythrocyte SOD activities and those metal concentrations. Neither smoking nor alcohol consumption was related to the level of heavy metals and the oxidative stress biomarkers. As the results of multiple regression analysis with stepwise selection method, 1) the change of MDA level were dependent with the level of α-tocopherol and blood selenium concentration(R²=19.7), 2) the plasma α-tocopherol level was dependant with MDA and blood chromium concentration(R²=15.6), 3) in case of erythrocyte SOD activity, only the duration of work was significantly selected.

변색 실활치에 대한 carbamide peroxide gel의 표백효과

박선아,김선호,황윤찬,오병주,윤창,박영준,정선와,황인남,오원만 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.4

The bleaching of discolored nonvital teeth is conservative treatement that satisfy the cosmetic desire. The most common method for this treatement, walking bleaching, is using 30% hydrogen peroxide and sodium perborate. Many alternatives are suggested for preventing the external cervical root resorption that is the common complication of the nonvital teeth bleaching with 30% hydrogen peroxide. The same extent of oxidation reactions as that resulted by the bleaching with the application of 30% hydrogen peroxide and sodium perborate can also be acquired more safely by materials that contain 10% carbamide peroxide, used primarily for the bleaching of vital teeth. Therefore, this study was performed to evaluate the efficacy of 10% and 15% carbamide peroxide bleaching gel in nonvatal teeth bleaching. The internal bleaching of intentionally discolored teeth was performed in vitro with 10% carbamide peroxide (Group 1), 15% carbamide peroxide (Group 2), mixture of distilled water and sodium perborate (Group 3), and mixture of 30% hydrogen peroxide and sodium perborate (Group 4). The bleaching materials were refreshed following 3, 6, 9 and 12 days. To evaluate the bleaching effect, the color change of the crowns was measured at 1, 2, 3, 4, 7 and 15 days of bleaching using the colorimeter. The results were as follows : 1. L^* and ΔE^* values were increased with time in all bleaching agents(p<0.01). 2. There was no significant difference in L^* and ΔE^* value among bleaching agents. 3. Δ^* value higher than 3 was shown after 3 days of bleaching with 10% carbamide peroxide gel, 1 day with 15% carbamide peroxide gel, 4 days with mixture sodium perborate and distilled water and 4 days with mixture sodium perborate and 30% hydrogen peroxide, respectively. These results revealed that the use of 10% and 15% carbamide peroxide bleaching gel in non-vital teeth bleaching is as effective as mixture of distilled water and sodium perborate and mixture of 30% hydrogen peroxide and sodium perborate. Accordingly, carbamide peroxide could be used clinically to bleach discolored non-vital teeth.