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박범수(Bumsoo Pak),홍민성(Minsung Hong) 한국생산제조학회 2006 한국생산제조학회지 Vol.15 No.6
The use of snap-fit features is highly recommended to reduce overall product cost and manufacturing time by reducing the number of parts and eliminating assembly with conventional fasteners. Application to particular product for integral attachment using snap-fit features is needed. Alternative attachment concept for specific application has been introduced. In this study, the optimal attachment design based on the given design objectives is identified using newly developed alternative attachment concept for the specific application to LCD monitor case assembly. Integral attachment using snap-fit features applies the systematic procedure and the intensity analysis.
생체 내 Pig-a 유전자 돌연변이시험에 대한 세 시험실의 전수가능성 평가
정영신 ( Young-shin Chung ),박범수 ( Bumsoo Pak ),한세희 ( Sehee Han ),이지연 ( Jiyeon Lee ),김지영 ( Jiyoung Kim ),백승민 ( Seng-min Back ),박초롱 ( Cho-rong Park ),김수환 ( Su-hwan Kim ),이종권 ( Jong-kwon Lee ) 한국동물실험대체법학회 2017 동물실험대체법학회지 Vol.11 No.1
In order to establish a pig-a gene mutation assay as a regulatory test for evaluating in vivo genotoxicity in Korea, the transferability study as a stage II validation was performed using the test substance, N-ethyl-N-nitrosourea (ENU) across three laboratories. The lead laboratory (KIT) standardized the protocol using Rat MutaFlow® Kit and transferred the methodology to two participating laboratories (Hoseo University and Biotoxtech Co. Ltd.). Sprague Dawley rats were treated with vehicle or three dose levels of ENU (10, 20, 40mg/kg) by oral gavages on the 3 consecutive days. On the day 15 after the first treatment, bloods were collected and analyzed to estimate the percentage of reticulocytes (%RETs), mutant type of RETs and erythrocytes (RBC) using flowcytometer. In results, the exposure of ENU induced the dose-dependent increases in the mutant frequencies of RBCCD59- and RETCD59-, while %RETs were not affected. Data comparisons among three participating laboratories indicated the good transferability with the high correlation coefficients (0.97-0.99) between the lead and participating laboratories. In conclusion, the pig-a gene mutation assay may be the effective test for the estimation of in vivo gene mutation and the validation studies may be needed using more test substances in Korea.
홍민성(Minsung Hong),김종민(Jongmin Kim),박범수(Bumsoo Pak) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
Use of plastic parts in assemblies is growing due to advantages over other materials that include light weight, low material cost, and ease of fabrication of complex parts by molding. In mechanical fastening, use of snap-fits has become a popular technique due to advantages such as lower part count, reduced assembly time, and reduced tool requirements. In this study, the hierarchical classification scheme is expended and applied to a computer program(visual basic) to get optimize snap-fit design. When you choose shapes and assembly motions you want, the program gives you the appropriate model.