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Lim, J.H.,Shim, J.H.,Choi, J.H.,Park, J.H.,Kim, W.,Joo, J.,Kim, C.J. North-Holland 2009 Physica. C, Superconductivity Vol.469 No.15
We fabricated nano-carbon (NC) doped MgB<SUB>2</SUB> bulks using an in situ process in order to improve the critical current density (J<SUB>c</SUB>) under a high magnetic field and evaluated the correlated effects of the doped carbon content and sintering temperature on the phase formation, microstructure and critical properties. MgB<SUB>2-x</SUB>C<SUB>x</SUB> bulks with x=0 and 0.05 were fabricated by pressing the powder into pellets and sintering at 800<SUP>o</SUP>C, 900<SUP>o</SUP>C, or 1000<SUP>o</SUP>C for 30min. We observed that NC was an effective dopant for MgB<SUB>2</SUB> and that part of it was incorporated into the MgB<SUB>2</SUB> while the other part remained (undoped), which reduced the grain size. The actual C content was estimated to be 68-90% of the nominal content. The NC doped samples exhibited lower T<SUB>c</SUB> values and better J<SUB>c</SUB>(B) behavior than the undoped samples. The doped sample sintered at 900<SUP>o</SUP>C showed the highest J<SUB>c</SUB> value due to its high doping level, small amount of second phase, and fine grains. On the other hand, the J<SUB>c</SUB> was decreased at a sintering temperature of 1000<SUP>o</SUP>C as a result of the formation of MgB<SUB>4</SUB> phase.
HMM을 이용한 연속 음성인식 시스템의 화자적응화에 관한 연구
심장엽,김상범,김주성,김수훈,이영재,이종진,허강인 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
It is hard to collect sufficient speech data for training a speaker-dependent (SD) model from the same speaker. In contrast, to trains a speaker-independent (SI) model need not collect a large amount of speech data per speaker but from many speakers. Speaker-adaptation (SA) is an additional training technique from SI model by a small amount of adaptation speech. It has proved to be a powerful tool for achieving good recognition performance without the high cost of SD training. In this study, a speaker adaptation algorithm (MAPE) which trains it by every utterance sequentially without hand-labelling is introduces. The hand-labelling is performed automatically by Concatenation training and Viterbi-segmentation. The secuential-training is performed by MAPE(Maximum A Posteriori probability Estimation). We can train it using any small amount of adaptation speech data. For newspaper editorial continuous speech, the recognition rates of adaptation of HMM was 62.5% respectively which is approximately 32.5% improvement over that of unadapated HMM.
외팔보형 압저항 가속도 센서의 압저항 변화율 분포에 관한 연구
한근조,심재준,이상석 東亞大學交附設 生産技術硏究所 2005 生産技術硏究所硏究論文集 Vol.10 No.-
Sensor used by semiconductor process produces an MAP sensor and applied to several industry. Among those sensors divided as transducer which convert physical quantity into electrical value, piezoresistive type sensor has been studied for the properties and sensitivity of piezoresistor. In this paper, the variation of seismic mass which have been functioned as actuator moving the cantilever beam analyzed the effect on distribution of resistance change ratio and supposed the optimal shape and position of piezoresistor. The resulting are following; According to the increment of seismic mass size, the value of resistance change ratio decreased cause by improve the stiffness. Y directional piezoresistor is formed in spot of 100㎛ apart from cantilever edge and length of that is 800㎛. To increase the sensitivity, piezoresistor is made as n-type and x-dirction.
간호대학생의 에니어그램 성격유형에 따른스트레스 대처방식
김희주,박가영,박지영,송예빈,심지현,이수연,이지영,장주희,정영민 이화여자대학교 간호과학대학 2011 이화간호학회지 Vol.- No.45
The purpose of this study is to analyze the relationship between stress coping behaviors and Enneagram personality types. The subject of the study is 342 college students who are attending 4-year nursing colleges in Seoul, Korea, and 198 students among them are qualified for the study. Typified statistical tools SPSS, chi-square, and ANOVA are used as analyzing methods in the study. The research results are as follows: 1. In nursing students, freshman class is the highest population in the study with 63 students(31.82 %), and the highest percentage of population does not have a religion(89 students, 44.95 %). 120 students (60.61 %) answered that their interpersonal relationships are good, and 105 students(53.03 %) are satisfied with the nursing major. 2. In Enneagram personality type, 9 type is the highest(42.42 %). 3. Problem focused coping type is the highest in stress coping behaviors(28.12(±20.16) points). 4. Problem focused coping behavior and social support coping behavior show significance. 5. Social support coping behavior shows significance, and 3 type scored the highest(17.67(±2.66) points). Further studies are suggested based on above results: First, in order to achieve more accurate results, the research of Enneagram and stress coping behavior with representative for sample Korean nursing students is necessary. Second, Development and verification the effect of stress coping program based on Enneagram personality types among nursing students are necessary.