http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yim, S.W.,Park, C.R.,Yu, S.D.,Kim, H.R.,Hyun, O.B.,Sim, J.,Park, K.B.,Oh, I.S. North-Holland 2009 Physica. C, Superconductivity Vol.469 No.15
In the first-peak non-limiting type superconductor-triggered fault current limiter (STFCL), which was developed by the collaborative work of KEPRI and LSIS, the first half cycle of fault currents is passed, unlimited. Due to these characteristics, information needed for the fault judgments can be provided to the protection relays, which is useful for the protective coordination of power system. In this fault current limiter, superconductors are used as a fault detector that does not generate resistive loss in normal operation state. Therefore, high J<SUB>c</SUB> and fast occurrence of large resistance are the essential properties of superconductors for the application to fault detectors. In this study, for the design of superconducting fault detector (SFD), we investigated the quench behavior of two kinds of superconductors, stabilizer-free coated conductors (SF-CC) and Au/YBCO/sapphire substrate, during the operation of the first-peak non-limiting type STFCL. The dimension of SF-CC was 12mm widex1000mm long and that of Au/YBCO/sapphire was 20mm widex100mm long. Their critical current (I<SUB>c</SUB>) values were 250A and 200A, respectively, and the critical temperature (T<SUB>c</SUB>) was both 90K for both superconductors. When fault currents of over 3kA were applied, the STFCL carried out the current limitation successfully. At the beginning of the quench, SF-CC generated a resistance of 150mΩ, and 394mΩ was generated in the Au/YBCO/sapphire substrate, when 150V<SUB>rms</SUB> was applied. After the first half cycle, the resistance of the superconductors increased up to 263mΩ, and 846mΩ, respectively, and the temperature reached 132K and 127K. In addition, we also investigated the recovery characteristics of the SFDs. The SF-CC and Au/YBCO/sapphire substrate recovered the superconductivity by 353ms and 357ms, respectively. Based on the results of the analysis, we determined the required length of the superconductors for the SFD application.
간호 전공과 비 간호 전공 여대생의 여성 갱년기에 관한 지식, 태도 및 어머니와 친밀감에 대한 연구
이다영,이다은,이정원,김봄경,황은주,류정미,김하연,신은지,박혜미,임은지 이화여자대학교 간호과학대학 2015 이화간호학회지 Vol.- No.49
Purpose: This study investigated the difference of menopausal knowledge, attitude between nursing students and non-nursing students. The relationships of the level of menopausal knowledge and attitude and the level of closeness to mother were investigated. Methods: A correlational descriptive design was used with a convenience sample. The survey was conducted with 206 female college students, 106 nursing and 100 non-nursing students, between September 1 and September 14, 2014. The instruments were the Knowledge of Menopause scale, the Menopausal Attitude Measurement scale, and the Level of Closeness to Mother scale. SPSS v22.0 is used to statistical analysis of descriptive statistics, independent t-tests, correlation and χ2-tests. Results: The difference in menopause knowledge between nursing students and non-nursing students is statistically significant (t=6.085, p<001). Nursing and non-nursing college students’ menopause knowledge had a positive relationship with attitude (r = 0.241, p<001). In closeness to mother, there is no significant difference was shown between nursing and non-nursing college students, even though the levels of menopause knowledge are different (t=1.336, p=.183). Conclusion: Results showed having menopausal knowledge positively influences students’ attitudes about menopause. Educators should develop programs imparting menopausal knowledge for non-nursing college students to increase positive menopausal attitude.
임홍재(H.J.Yim),이상범(S.B.Lee),장현수(H.S.Jang),유헌일(H.I.Yoo) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Dynamic and static characteristics of the beam structure are mainly influenced by the shape of the cross section and material properties. Since the shape of the cross section determines the stiffness of the beam. such as I_x. I_y. J. an optimal shape of the cross section of the beam must be searched for the optimal stiffness design of the beam structure. In this paper an optimal design methodology for the thin-walled beam structure is presented.<br/>
孟琦錫,洪元杓,任洪彬,李廷玟,朴萬植,李載元,金八圭,權五憲,成世鎭,朴東徹,金太均,李定根 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1
Since the College of Industrial Education of Chungnam National University took charge of technical teacher preparation in 1977, much efforts have been concentrated on the activities for creating favorable educational environments in terms of curricula, pedagogic affairs, inner and outer facilities, etc. In this study some imposed barriers which are likely to hinder this college from achieving better education were identified and analysed. Considerably large scale of the student enrollment in comparison with the market demand is a prevailing issue which causes an adverse effect for clarification of the educational goal of the college and another problem is concerned with the student entry criteria which do not require the pre-experiences in the field. Under this circumstances, a guide line to improve the teacher education is recommended as follow; 1) The number of the student enrollment should be adjusted to meet the minimum range in the wave of the technical teacher demand projection and the shortage of teacher could be covered by the graduates from the shortterm courses in this college. 2) The current curriculum is accordingly recommended to be diversified taking into consideration the qualification of the student. The suggested consists of four-year regular course, one-year course, and six-month course and the short-term courses are provided to induce the experienced people from industries. 3) In order to have teachers adjust themselves to changing technology, education on sound and fundamental knowledges should be provided in the pre-service education course and education on advanced knowledges and applied theories deferred to the in-service training course. 4) In the four-year pre-service education, the general education and pedagogic subjects are to be drastically intensified from 18 credits and 22 credits up to 40 credits and 30 credits respectively.
멀티채널 방식에 의한 초미세 바늘 전극의 제작 및 빔 특성
임연찬,현정우,김성수,박철우,이종항,강승언 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
An ultra-sharp tungsten electrode for field emission was manufactured by using an electrochemical etching method, and its beam characteristics were investigated. KOH and NaOH were the electrolytes used in this research, and the taper length of the tip varied form 150 μm to 250μm according to the applied voltage and the concentration of the electrolyte. The electron-beam stability was measured to be within 5% for a total emission current of 5 μA during 4 hours of operation, and the ignition voltages were found to be ~300 V. The tip radius was experimentally found to be 250A˚ from a linear fitting of Fowler-Nordheim plots, which was in remarkably good agreement with that of the image size from scanning ion-microscopy.
임명진,백경욱 한국마이크로전자및패키징학회 1997 Symposium on Multichip Module and Advanced Packagi Vol.1 No.1
Anisotropic conductive film (ACF) composed of an adhesive resin and tine conductive fillers such as metallic particles or metal-coated polymer balls are key materials for fine pitch chip-tin-film (COF) and chip-on-glass (COG) LCD packaging technologies. To understand the efficiency of electrical conduction in ACF, the theoretical electrical conduction model with physical contact mechanism has been simulated and experimentally proved. Three pressure dependent models - 1) elastic deformation Hertz contact model, 2) plastic deformation model and 3) FEM model - were developed. It was shown that the electrical contact resistance of ACF depends on the external pressure, the number, the size, mechanical and electrical properties of particles. Electrical conduction through the pressure engaged contact area between conductive particles and conductor substrate is the main conduction mechanism in ACF interconnection. Contact resistance of ACF is determined by the contact area change between particles and contact substrates. This was supported by the experimental results using nickel powder and metal-coated polymer ball-filled ACFs.