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김민환,오종민 호남대학교 1998 호남대학교 학술논문집 Vol.19 No.2
With the development of industry and standard of living, the quantity of groundwater consumption has been increasing. In exploiting the groundwater, the quantity of groundwater should be estimated exactly, The hydraulic parameters to be estimated are transmissivity coefficient and storage coefficient. They were determined by the slope matching(SM) method which the physical quality of aquifer was reflected. However, SM method has some technical problems that error can occur in the process of graphical solution between the Theis type curve and the field curve. This paper suggested the improved SM method which can supplement the technical problem of SM method. In case of estimating the hydraulic parameters by other method using the Todd's pumping test data, it takes much time and it can be subjective. However, the improved SM method eliminated these problems by automating perfectly.
오종민,원태완 한국유방암학회 2019 Journal of Breast Disease Vol.7 No.2
Purpose: Gynecomastia is the most common cause of male breast enlargement and is a disease which can occur in men of all ages. The purpose of this study was to evaluate the effect of tamoxifen on size reduction of breast tissue in gynecomastia patients, regardless of age and symptoms. We also, aimed to investigate the advantages and disadvantages of tamoxifen compared to surgery and other medications. Methods: Twenty patients diagnosed with gynecomastia at the Breast and Thyroid Surgery Department, of Wonkwang University Hospital from January 2013 to February 2019 were included. All patients received tamoxifen 20 mg once a day or 10 mg twice a day; two months of treatment was planned, and medication was administered. The diameter and depth of the gynecomastia tissue were followed up with breast ultrasound before and after treatment. A survey of age, nationality, location, symptoms, duration of symptoms, previous history, and causes was also conducted. Results: Breast tissue size was measured by ultrasound when the gynecomastia patients first visited and after using tamoxifen. As a result, mean diameter decreased by 41.9%, mean thickness decreased by 41.0%, and estimated mean volume decreased by 74.3%, except for one patient with recurrence. No side effects of tamoxifen were found in this study. Conclusion: Since tamoxifen treatment has few side effects and recurrence is rarely reported at the time of discontinuation, it is a good primary treatment. But secondary treatment should be considered if there is no subsequent reaction. Surgical treatment may also be considered for gynecomastia patients with Tanner’s breast stage higher than 4, or who want an immediate reduction in breast size.
오종민,조영민,강상완 한국환경영향평가학회 2000 환경영향평가 Vol.9 No.1
The purpose of this work was to document the conditions regarding organic solvent exposure to the workers in paint industry. Air concentrations of organic solvents were measured by passive personal samplers and analyzed by a gas chromatography. Urine samples for hippuric test were also taken from 330 workers who have worked at seven domestic factories for more than two years. Amongst 25 organic elements detected in the indoor environment of working places, toluene was the most common element, and methanol showed the highest mean concentration(18.2ppm). A few elements including methylethyl ketone and toluene partially exceeded the Korean Permissible Exposure Limit. A lack of environmental facilities such as exhaust ventilation, automatic cleaning system, and personal safety devices at present work plaus brings about various occupational diseases.