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홍지석(Ji-Seok Hong), 정원철(Won-chul Jung), 김현진(Hyeon-jin Kim), 이민재(Min-Jae Lee), 정대성(Dae-Seong Jeong), 전창수(Chang-Soo Jeon), 성홍계(Hong-Gye Sung), 신석재(Seock-Jae Shin), 남석우(Suk-Woo Nam) 한국항공우주학회 2013 韓國航空宇宙學會誌 Vol.41 No.3
소형 무인항공기의 동력장치로 연료전지 시스템을 적용하기 위해 화학수소화합물 수소 저장방법을 이용한 소형 수소 발생 제어장치를 설계하였다. 효율이 높은 소형/경량 수소 발생 제어장치를 설계하기 위하여 NaBH4 수용액 공급 유량에 따른 Co-B 촉매의 수소 전환율을 확인하였고, 100W 스택의 최대 수소 발생량에 적합한 Co-B 촉매양을 제안하였다. 효율적인 연료 소모를 위해 Dead-end 방식의 스택을 선택하였고, 수소 발생 제어장치 내부 압력을 이용한 펌프 on/off 제어로 수소 생성량을 제어하였다. 소형 수소 발생 제어장치를 이용한 연료전지 시스템의 각 작동구간에서 안정된 운전을 확인하였다. 장시간 운전 실험을 통하여 최대 7시간 운전이 가능하며, 임의의 비행 프로화일에 요구되는 추력 프로화일은 최소 4시간 이상 조정 가능함을 확인하였다. A compact hydrogen generation device of fuel cell system using chemical hydride storage technique was designed to fit the propulsion device requirement of a small unmanned aerial vehicle(SUAV). For high efficient, compact, and lightweight hydrogen generation control device, the Co-B catalyst hydrogen conversion rate by NaBH4 aqueous solution flux is measured so that the proper amount of Co-B catalyst for maximum hydrogen generation of 100W stack was proposed. A compact hydrogen generation device is controlled by pump"s on/off using its own internal pressure and consumes fuel in high efficiency through a dead-end type fuel cell. The fuel cell system has stable operation for a planed flight profile. The system operates up to maximum 7 hours and at least 4 hours for tough flight profiles.
The author attempted to confirm anal trait of the Korean adult male. This study was based on a translation into Korean of the anal trait scale of Gotheil and consisted of a forty item questionnaire regarding the anal traits. This study also tried to perform principal component factor analysis based on the score of forty item questionnaires on anal trait scale from the one hull-ire] fifty adult males, and varimax rotated factors with Kaiser normalization. The result of principal component factor analysis based on the score of forty item questionnaire on the anal trait scale, i. e. anal trait of the Korean adult male showed the following factors as being cominant. Indecisiveness factor, Practicalness factor, Emotional constrictiveness factor, Checking factor, Rigidity factor, Miseriness factor, Conservativeness factor, Design factor, Meticulousness factor, Parsimony factor, Perfectionistic factor, Accuracy factor, Cleanliness factor, Sensitivity factor, and Orderliness factor.
The author attempted to compare the differences between each item of the oral trait scale of age groups and sex groups in the same group. The two phase sampling method was utilized in the collection of data from 900 residents living in Chungchung area. One hundred and fifty men and women from each of the following age groups participated in this study: under 19, 20-39 and 40-64. Differences among 3 age groups by student t-test was tested based on the score of each questionnaire of the oral trait scale and was also tried to test statistically the frequency of number of the positive responses to the each questionaire by means of the X²test. The result by means of the above subjects and method are summarized as follows: 1. There was a tendency of no differences in each score of 40 questionnaire of the oral trait scale in elder groups. 2. There was a tendency of more strong oral trait in women at any age.
This investigation was attempted to observe the differences of the structure of the neurotic symptoms in normal persons. The number of the persons to be participated for this study was two hundred(105 males and 95 females). and was classified into four age-groups: 20 to 34, 35 to 44, 45 to 64, and over 65 years. The data of each group got from the method of the general health questionnaire (GHQ), and the scores were performed with the principal component factor analysis and Varimax-rotated factors were interpreted with the Kaiser normalization. The results were obtained the priority order of each factor in the neurotic symptoms as follows: 1. Seven factors in the age-group of 20 to 31 were hopelessness, headache, hypochondriasis, indecision, insomnia, helplessness, and inefficiency. 2. Four factors in the age-group of 35 to 41 were hopelessness, insomnia, inefficiency, and irritability. 3. Six factors in the age-group of 45 to 64 ware inefficiency, hopelessness, hypochondriasis, irritability, headache, and insomnia. 4. Four factors in the age-group of over 65 were hopelessness, inefficiency, hypochondriasis, and irritability. From the above results, the popular and dominant factors in all age-groups were hopelessness and inefficiency, the first factor in all-groups was hopelessness except the group of 45 to 64 and the first factor in the age-group of 45 to 64 inefficiency.
The author has attempt to study the personality of the adolescent by utilize the MMPI. One thousand and two hundred normal, male student, aged between 13 through 19 were selected randomly for this study. Summaries are made as follow: 1. T score of the validity scales is higher in the younger than in elder age group. 2. In the T score of the clinical scores, there are higher of the psychotic and behavior disorder scales in the younger group, but there are higher score of standard deviation, standard error and coefficient of variance in the elder age group. 3. The value of anxiety index and internalized ratio is higher in the elder age group. 4. The value of active hostility index is higher in the younger age group, but passive aggressive index is higher in the elder age group.