• JSTS:Journal of Semiconductor Technology and Science
• /
• v.16 no.5
• /
• pp.687-694
• /
• 2016

A differential power amplifier operating at millimeter-wave frequencies is demonstrated using a 65-nm CMOS technology. All of the input, output, and inter-stage network are implemented by transformers only, enabling impedance matching with low loss and a wide bandwidth. The millimeter-wave power amplifier exhibits measured small-signal gain exceeding 12.6 dB over a 3-dB bandwidth from 45 to 56 GHz. The output power and PAE are 13 dBm and 11.7%, respectively at 50 GHz.

• Speech Sciences
• /
• v.12 no.1
• /
• pp.7-14
• /
• 2005

This study investigated the reading ability of Korean second-graders and the relationship between reading and phonological awareness and RAN (Rapid Automatized Naming) ability. A language-based reading assessment battery was used. Children at the end of the Korean second-grade were still at the developmental stage of decoding skill and seemed to be at Chall's stage 1. Findings indicated significant correlations between reading ability and phonological awareness and between reading ability and RAN ability. Therefore, the importance of phonological processing could be extended to syllable-based alphabetic languages.

• Bulletin of the Korean Chemical Society
• /
• v.23 no.9
• /
• pp.1285-1290
• /
• 2002

Various nitrobenzaldehydes were simultaneously allylated and reduced using indium in the presence of HCl in aqueous media to give compounds having both functionality of homoallylic alcohol and aromatic amine. Sequential protection of the amino gro up and oxidation of the anilinyl homoallylic alcohol provided useful precursors of heterocyclic compounds such as dihydroindolones and dihydroquinolones, which could be efficiently synthesized through intramolecular cyclization reaction.

• Proceedings of the IEEK Conference
• /
• 1999.11a
• /
• pp.177-180
• /
• 1999

A two-stage monolithic microwave integrated circuits (MMIC) broad-band power amplifier with AlGaAs/InGaAs/GaAs pseudomorphic high electron mobility transistor (PHEMT) has been developed for the up-link and down-link applications for local multipoint distribution systems (LMDS) in the frequency range of 24~28㎓. The amplifier has a small signal gain of 18.6㏈ at 24.5㎓ and 16.7㏈ at 27.1㎓. It achieved output powers of 19.8㏈m with PAE of 19.8% at 24.5㎓ and 18.8㏈m at 27.1㎓.

• Bulletin of the Korean Chemical Society
• /
• v.32 no.7
• /
• pp.2449-2452
• /
• 2011

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2006.04a
• /
• pp.218-219
• /
• 2006

• Journal of Microbiology and Biotechnology
• /
• v.5 no.4
• /
• pp.241-243
• /
• 1995

A lipopolysaccharide (LPS) defective mutant of Bradyrhizobium japonicum was characterized in terms of its cell surface hydrophobicity (CSH). By monitoring the kinetics of adhesion to hexadecane the LPS mutant was found to be far more hydrophobic than the wild type strain; the removal coefficients were 4.65 $min^{-1}$ for the mutant, as compared with only 2.40 $min^{-1}$ for the wild type. The possible role of cell surface hydrophobicity of B. japonicum in nodulation process is discussed.

• Proceedings of the Korean Vacuum Society Conference
• /
• 1996.02a
• /
• pp.133-133
• /
• 1996

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2007.11a
• /
• pp.234.2-234.2
• /
• 2007

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2018.04a
• /
• pp.70-70
• /
• 2018