Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Jong-Back Lee"'
A Study on the Preliminary Validity Analysis of Korean Firefighter Job-Related Physical Fitness Test
Publikováno v:
International Journal of Environmental Research and Public Health; Volume 19; Issue 5; Pages: 2587
The purpose of this study is to revise and modify the firefighter job-related performance tests from overseas to implement into the circumstances in Korea, examine its validity by analyzing the level of association between the test employed in the on
Publikováno v:
Journal of Nuclear Materials. 417:344-347
The mechanical properties of SiCf/SiC composites have been investigated, based on detailed analyses of their microstructure. SiCf/SiC composites were prepared from fiber preforms by a slurry infiltration technique, in which a mixture with SiC, Al2O3,
Publikováno v:
Journal of Nuclear Materials. 417:371-374
This paper dealt with the microstructure and mechanical properties of SiC based composites reinforced with different reinforcing materials. The composites were fabricated using reinforcing materials of carbon nanotubes (CNT) and Tyranno Lox-M SiC cho
Autor:
Jin-Kyung Lee, Young-Chul Park, Younho Cho, Joon-Hyun Lee, Gyu-Chang Lee, Sang-Pill Lee, Jong-Back Lee
Publikováno v:
International Journal of Modern Physics B. 20:3775-3780
TiNi shape memory alloy was used to recover the shape of transformed objects using its shape memory effect. This shape memory effect plays an important role inside metal matrix composite. A composite using shape memory alloy has a large advantage tha
Publikováno v:
International Journal of Modern Physics B. 20:3793-3798
The high temperature property of SiC/SiC composites fabricated by the melt infiltration (MI) process has been investigated. SiC/SiC composites reinforced with BN/SiC double coated Hi-Nicalon SiC fibers were fabricated by infiltrating molten silicon i
Publikováno v:
International Journal of Modern Physics B. 20:4487-4492
A new series of thermotropic polyurethanes containing biphenyl units was synthesized by polyaddition reaction of diisocyanates such as 2,6-tolylene diisocyanate, 2,5-tolylene diisocyanate, 2,4-tolylene diisocyanate, and 1,4-phenylene diisocyanate, wi
Publikováno v:
Macromolecules. 31:975-981
High-molecular-weight para-type homopolyurethanes prepared by polyaddition of 2,5-tolylene diisocyanate with 4,4‘-bis(ω-hydroxyalkoxy)biphenyls showed monotropic liquid crystallinity, when measurements were performed under shearing. For example, a
Publikováno v:
Polymer Journal. 27:664-672
Synthesis and Thermotropic Properties of Polyurethanes Prepared from 2,5-Tolylene Diisocyanate and 2,6-Bis(ω-hydroxyalkoxy)naphthalenes
Publikováno v:
Macromolecules. 28:2165-2171
Thermotropic liquid-crystalline polyurethanes were synthesized by the polyaddition reaction of para-substituted 2,5-tolylene diisocyanate (2,5-TDI) with 1,4-bis(ω-hydroxyalkoxy)benzenes (BHBm : HO(CH 2 ) m OC 6 H 4 O(CH 2 ) m OH ; m is the carbon nu
Publikováno v:
Macromolecules. 26:4989-4994
Thermotropic polyurethanes [O(CH 2 ) m OPHPhO(CH 2 ) m OCONHPh(R)NHCO] n (m= 2-6,8,11; R= H, Me) with intrinsic viscosities in the range of 0.41-0.99 dL/g were synthesized. DSC thermograms for these polymers exhibited two endothermic peaks correspond