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Chun, Sae Hwan,Shin, Kwang Woo,Kim, Hyung Joon,Jung, Seonghoon,Park, Jaehun,Bahk, Young-Mi,Park, Hyeong-Ryeol,Kyoung, Jisoo,Choi, Da-Hye,Kim, Dai-Sik,Park, Gun-Sik,Mitchell, J. F.,Kim, Kee Hoon American Physical Society 2018 Physical Review Letters Vol.120 No.2
<P>An electromagnon in the magnetoelectric (ME) hexaferrite Ba-0.5 Sr-2.5 Co-2 Fe-24 O-41 (Co-2 Z-type) single crystal is identified by time-domain terahertz (THz) spectroscopy. The associated THz resonance is active on the electric field (E-omega) of the THz light parallel to the c axis (parallel to [001]), whose spectral weight develops at a markedly high temperature, coinciding with a transverse conical magnetic order below 410 K. The resonance frequency of 1.03 THz at 20 K changes -8.7% and +5.8% under external magnetic field (H) of 2 kOe along [001] and [120], respectively. A model Hamiltonian describing the conical magnetic order elucidates that the dynamical ME effect arises from antiphase motion of spins which are coupled with modulating electric dipoles through the exchange striction mechanism. Moreover, the calculated frequency shift points to the key role of the Dzyaloshinskii-Moriya interaction that is altered by static electric polarization change under different H.</P>
여자 고등학교 학생들의 교복재킷 브랜드 선호 및 맞음새 실태에 관한 연구
신새미 ( Sae Mi Shin ),천종숙 ( Jong Suk Chun ),최은아 ( Eun Ah Choi ) 복식문화학회 2012 服飾文化硏究 Vol.20 No.3
The market share of conglomerates is increasing in the Korean school uniform market these days. Functional fit problems occurred. Girls choose slim silhouette often experienced fit problems. The purpose of this study is to probe for functional design elements of high school girls` uniforms. A questionnaire survey was carried out. 202 high school girls took part in the survey. The questionnaire measured school uniform brand preference and size of school uniform jackets. The results of the survey show that over half of participants(56.6%) wore their jackets over nine hours per day. They considered the aesthetics of the design as the most important factor when purchasing school uniforms. That element affected their brand preference. In analyses of the fit suitability, there were no significant differences between brands. The jacket lengths were significantly different among brands, but all were evaluated as being short. About 60% of students had difficulty raising their arms while wearing their school uniform jackets. The results of this study revealed that high school girls` uniform jackets are too short and tight. Ergonomic design elements should be applied to high school girls` uniform jackets.
Cho, Sae-Youll,Lee, Seon-Hwa,Park, Su-Jin,Choi, Kyu-Up,Cho, Jun-Mo,Hur, Jang-Hyun,Shrestha, Anupama,Lim, Chun-Keun The Korean Society of Plant Pathology 2009 Plant Pathology Journal Vol.25 No.1
Pseudomonas fluorescens strain Gpf01, isolated from ginseng rhizosphere showed antiviral activity against Cucumber mosaic virus, when tested in a local host of CMV, Chenopodium amaranticolor. Transposon mutant library of Gpf01 was prepared using pGS9::Tn5 and the mutant Gpf01-RS19 was found to loose antiviral production. We developed primers from the flanking region of Tn5 and found a cosmid clone pAV1123, harboring 1.2 kb antiviral compound producing (avcf01) locus. When a sub-clone pPH9, which carried 9.3 kb region of pAV1123, was introduced into antivirus deficient P. fluorescens wild type strain B16, it exhibited antiviral activity. Using Tn3-gus mutagenesis and complementation analysis, it was found that the genes related to antiviral activity production resided in a 9.3 kb HindIII-HindIII fragment of pAV1123, indicating that the plasmid carries an essential genes promoting antiviral activity.