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이완철,양대열,김마태,고경태,이원기,김성용,김하영 대한남성과학회 2014 The World Journal of Men's Health Vol.32 No.3
Purpose: The aim of the present study aimed to evaluate the effect of testosterone on cardiovascular disease by using the Framingham Risk Score (FRS) in patients with sexual dysfunction. Materials and Methods: A total of 308 men with sexual dysfunction were enrolled in this study. Clinical assessments included the 15-item International Index of Erectile Function (IIEF), blood pressure measurement, and clinical laboratory indexes. The FRS, which predicts the incidence rate of cardiovascular diseases in the next 10 years, was calculated on the basis of age, gender, total cholesterol, smoking status, high density lipoprotein cholesterol, and systolic blood pressure. Results: The mean age of the 308 enrolled patients was 49.42±10.73 years, and the patients’ mean body mass index (kg/m2) was 25.07±3.14. The mean total IIEF score was 28.44±18.06. The median total testosterone concentration was 3.2 ng/mL (interquartile range [IQR]: 2.3∼3.2 ng/mL). The median calculated free and bioavailable testosterone concentrations were 0.052 ng/mL (IQR 0.039∼0.070 ng/mL) and 1.30 ng/mL (IQR: 1.00∼1.76 ng/mL), respectively. The mean FRS was 10.47±6.45. The FRS tended to show a negative correlation with the total and calculated free testosterone levels, but this was not significant (p=0.064 and p=0.074, respectively). In the multiple linear regression analysis, a significant negative correlation was observed between the total testosterone level and the FRS (p=0.048). Conclusions: The results suggest that the testosterone level is related to the FRS and that a high testosterone level may decrease the risk of cardiovascular disease.
일제강점기에 형성된 영단주택의 변화 및 그 원인에 관한 연구 : 상도동 영단주택의 주택지 및 주공간의 변화를 중심으로
이완철,이현희,박용환 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.1
It is essential for understanding the modernization of Korean houses to study the foreign houses flowed after opening a part. Especially, the houses built by 'Cho-Seon Administration' were bowed in entirely and established through housing plan, while the others flowed in separately. And after 1945 Liberation Koreans had begun to live in there and the houses had been survived on keeping sustaining changes through the time of urbanization and modernization in 1960's. In the study it is assumed that the houses built by 'Cho-Seon Administration' were established for the Japanese in Korea and they had relations with housing districts themselves and even entire city. The purpose of this study is to understand the process of forming urban dwellings through analyzing the characteristic of planned housing districts and dwelling spaces made by the Japanese, and investigating their sustaining changes in substituted dwelling culture up to the present.
韓國에서 使用되고 있는 齒科用 鑄造 金合金의 物理的 性質에 關한 硏究
李完哲,池憲澤 대한치과기재학회 1969 대한치과재료학회지 Vol.4 No.3/4
The purpose of this study is to determine whether Korean dentists are using the proper types of dental casting gold alloys comparing with those alloys of American Dental Association Specification, and to advice them on the four types of casting gold alloys, since they have been only using the medium hard and hard gold alloys for many years. Brumfield testing methods (1954) were used in testing the physical properties of medium hard and hard gold alloys, and also the four types of gold alloys which are composed in accordance with the range of composition of the American Society for Metals. The tested physical properties are (1) ultimate tensile strength, (2) elongation per cent, (3) hardness, and (4) fusion temperature. The result of study shows that medium hard and hard alloys are equal to the type Ⅱ and type Ⅲ of American Dental Association Specification respectively. The prepared four types of alloys were tested and their physical properties fell within that range. The result of this study recommends to the dentists of Korea that they consider the purities of the each component of dental casting gold alloys to have the proper types of gold alloys which equates to the American Dental Association Specification. Therefore, the authors are suggesting a new applied formula, the materials which can be purchased on the Korean market. The result also recommends for using four different suitable types of gold alloys for restorations, instead of only two types.
Metallic Stearates 가 Corn Starch 의 분체물성에 미치는 영향
지상철 ( S C Chi ),이완화 ( W H Lee ),양중익 ( J I Yang ),민신홍 ( S H Min ) 한국약제학회 1984 Journal of Pharmaceutical Investigation Vol.14 No.1
Mg. stearate and Ca. stearate were added to corn starch and the effect of these lubricants concentration on the physical properties of starch powder was examined by measurement of cohesiveness and flowability. Cohesiveness and flowability of the mixture were got from tapping method, by which both can be calculated with KAWAKITA equation at a time. Angle of repose was examined comparatively and corn starch-lubricant mixture was observed by scanning electron microscopy. Results obtained were as follows; 1) Cohesiveness of the mixture became smallest at 0.2% addition of Mg. stearate, and at 0.2∼0.5% of Ca. stearate. Flowability was best at the same concentration. 2) Angle of repose of the mixture showed similar trend to flowability got from tapping method. 3) Mixing state of corn starch and; lubricant was observed by scanning electron microscopy. At 0.2% addition of each lubricant, it showed proper existance in the space of corn starch particles. But larger addition of lubricant resulted superfluous existance and, further, formed aggregated. Therefore, improvement of physical properties of starch powder was small.
김동억,박제철,황종서,김동섭,이완옥,황길순 한국하천호수학회 2020 생태와 환경 Vol.53 No.3
The use of fishway has been investigated up to 2~9 years, continuously each month and over the long term that installed in 6 domestic rivers. The fish’s use of fishway has been investigated as direct collection by trap in exit section of the fishway. The population structure of fish using 6 fishway and the fish that live in the river showed difference. About 2 to 7 species of fish took possession of more than 80% of total use of fish in fishways. This seems to be not the results of attraction flow in fishway but specialized result of physiology characteristic followed by species of fish. In addition, the distribution of fish species using fishway was different with the fishways installed in river. This difference seems to be consequence of the place that of the river and fishway types. Generally, the fish species were less and had high ratio of home migratory fish in vertical slot type fishway, which shows relatively fast velocity of water flow. This analysis result of major fish species using fishway can be used in planning fishway and to choose major targeted species for the planning.
김신욱,이완철,김마태,고경태,이원기,이충현,김제종,양대열 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.10
Purpose: The aim of the present study was to evaluate the effects of low-dose tamsulosin on sexual function in patients with lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia. Materials and Methods: A total of 138 male LUTS patients aged more than 50 years with an International Prostate Symptom Score (IPSS) ≥8 were enrolled in this open-label, multicenter, prospective, noncomparative observational study. Clinical assessments included IPSS, quality of life (QoL) index, International Index of Erectile Function (IIEF), Danish Prostate Symptom Score (DAN-PSS), and an early morning erection questionnaire. The data were recorded at baseline and at 1 and 3 months after treatment with tamsulosin 0.2 mg/d. Adverse events were analyzed in all patients. Results: During the study period of 3 months, the IPSS and QoL index significantly improved from baseline by –11.40±9.40 and –1.11±1.36, respectively (p<0.001). However, there were no clinically relevant changes in total IIEF score (mean difference, 1.63±15.50; p=0.406) or the 5 subdomains (p>0.05). Furthermore, DAN-PSS weighted scores (A×B) showed no clinically relevant changes (mean difference on Q1, Q2, and Q3: –0.45±2.94, 0.27±2.50, and –1.27±2.27, p>0.05). In addition, there were no clinically significant changes in responses on the early morning erection questionnaire. Conclusions: Tamsulosin at the dose of 0.2 mg significantly improved the IPSS and the QoL index compared with baseline. However, tamsulosin did not exhibit any significant impact on sexual function or any negative impact on ejaculatory function.