• Nuclear Engineering and Technology
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• 제56권4호
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• pp.1145-1152
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• 2024

To realize an initial objective of the negative ion-based neutral beam injection (N-NBI) at the Comprehensive Research Facility for Fusion Technology (CRAFT) test facility, which targets an H⁰ beam power of 2 MW at an energy of 200-400 keV and a pulse duration of 100 s, it is crucial to study the cesium dynamics of the negative ion source. Here a numerical simulation program CSFC3D is developed and applied to simulate the distribution and time dynamics of cesium during short pulses. The calculations show that most of the cesium on the plasma grid (PG) area originates from the release of cesium that is accumulated within the ion source in the plasma phase. Increasing the wall temperature reduces the loss of cesium on the wall of the ion source. Furthermore, the thickness of the cesium monolayer is directly influenced by the PG temperature. Both simulated and experimental results demonstrate that maintaining the PG temperature between 180 ℃ and 200 ℃ is essential for enhancing the performance of the ion source and optimizing the cesium behavior.

• 한국생활과학회지
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• 제20권6호
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• pp.1135-1151
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• 2011

This study examined green consumption behavior according to the lifestyles of college students. The data were collected from 314 college students in Yeungnam region by a self-administered questionnaire. Frequencies, Cronbach's alpha, factor analysis, cluster analysis, chi-square tests, one-way analysis of variance, Duncan's multiple range tests, Pearson's correlation analysis, and multiple regression analyses were conducted by SPSS Windows V.18.0. According to the result of factor analysis, lifestyles were categorized into six factors: thrift-saving type, enthusiastic activity type, brand ostentation type, freedom-seeking type, material oriented type, and practice-seeking type. Cluster analysis showed respondents belonged to one of four groups: thrift practice group, indifference group, freedom-seeking group, and material ostentation group. The levels of green purchase behavior, green usage behavior and green disposal behavior of the respondents was not high. The thrift practice group showed higher levels of green purchase behavior, green usage behavior, and green disposal behavior. Finally, according to multiple regression analyses, environmental consciousness, knowledge about green consumption, lifestyle groups were the significant factors affecting green consumption behaviors. These results imply that green consumption education for college students should be activated to induce green life.

• 가정과삶의질연구
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• 제20권2호
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• pp.21-28
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• 2002

The purpose of this study was to investigate how the financial satisfaction of housewives was related with the financial condition of households and the performance evaluation of household financial management behavior. In order to examine this relationship, internet questionnaire survey was conducted with 598 housewives. Results showed that household income and monthly debt repayment had only indirect effects on the financial satisfaction while monthly saving had both of the direct and indirect effects. It indicates that financial satisfaction level varies with the perceived performance of financial management behavior even though they have the same level of financial resources. Specifically, the division of financial roles and problem solving style between husband and wife affected the financial satisfaction of housewives.

• 대한교통학회지
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• 제13권3호
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• pp.19-33
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• 1995

Conventional traffic assignment techniques usually do not consider traveler's route choice behavior affected by hierachicla strucfture in urban highway system. This study realizes the route choice behavior such that travelers tend to choose more higher level of highway rather than lower level of highway for longer trops. Otherwise, for shorter trips, travelers tend to choose lower level of highway unless they can get sufficient travel time saving by using mojor arterial street or freeway (higher level of highway). Therefore, this study suggests a traffic assignment technique incorrporating route choice behavior related to hierachical highway structure by introducing some perception costs to generalized cost function such as perceptional preference measureemnt for higher level higheay and perceptional penalty when changing to different level of highway. Through simulation analysis, it is shown that the simulation results with the new traffic assignment echnique can be different a lot from the results with the convential method.

• 가정과삶의질연구
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• 제14권2호
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• pp.227-240
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• 1996

The purpose of this study was to identify (1) consumers' energy conservation attitude and behavior and (2) response to the energy conservation policies. For this purpose 1,200 male and female consumers who residents of 6 cities (Seoul, Pusan, Taegu, Kwangju. Taejoen, and Inchon) were surveyed through the standardized questionnares. The major findings were as follows; (1) The level of energy conservation attitude was relatively high and differed significantly according to sex, age, and education, (2) The level of energy conservation behavior was differed significantly according to sex, age, and education. (3) The energy conservation policies which provide consumers with energy saving information and education were more preferred. (4) There energy conservation attitude had the strongest effect on the energy conservation behavior.

• 한국항공운항학회지
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• 제27권4호
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• pp.96-104
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• 2019

The response to climate change of international air transport industry might be initiated by ICAO's CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation) which will impact on international airlines' flight operation behavior in the future. Though the airlines' efforts to reduce fuel consumption has been a major issue in economics of aviation industry, the improvement of fuel efficiency in flight operation will have additional impact on their profitability by introducing carbon emission cost. The fuel consumption in flight operation will be somewhat influenced by pilots' technical action for maneuvering aircraft during flight operation. This study will investigate pilots' behavior on decision for tactical aircraft control for mission flight. The data will be collected by the survey through sample pilots asking about their intention and perception on fuel savings during flight operations. The data will be analyzed by AHP process and the study will find out the elements and factors influencing pilots' behavior on technical decision of flight and their weights on fuel saving effects.

• 대한가정학회지
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• 제39권7호
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• pp.21-36
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• 2001

The purpose of this study is to investigate dining out behavior of college student living in jeju. The data obtained from 533 questionnaires returned by college student. 36.9% of students indicated over-eating, 27.2% did skipping meal, 14.8% did unbalanced diet, and 11.3% did indulging in hot and spicy food as dietary problems of food habits. Many students consumed 5,000-10,000 won/one time. In the breakfast 63.6% of students did not eat out, in the lunch only 10.5%, and in the dinner only 1.7% did not. The students ate out to take a meal in the breakfast, to meet their friends in the lunch, and to meet their friends and to haute social meeting in the supper. They considered intake nutrition and time saving in the breakfast when they ate out. But in the lunch they had various purposes- intake nutrition, time saving, making with relationships, and enjoying taste of foods. In the supper two-thirds of students considered promoting friendship. The satisfaction of eating out was different significantly from types of living and length of mealtime.

• 가정과삶의질연구
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• 제2권1호
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• pp.57-66
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• 1984

This study examines differences in the household saving show significant differences according to the specific stage of family life cycle. 337 housewives in Taegu were interviewed by questionnaire. Analysing method employed are frequency, percentage and Chisquare test. Findings are as follows; 1) The average ratios of household saving show significant differences according to the specific stage of family life cycle. 2) Purposed of household savings had significant differences at each stage of the family life cycle. 3) Selections of financial goods did not have significant differences according to the sage of family life cycle . 4) Selections of financial goods had significant difference according to the purposed of household savings.

• 한국컴퓨터정보학회논문지
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• 제29권2호
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• pp.153-168
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• 2024

본 연구는 의료정보서비스 애플리케이션에 대한 지속적 이용의도에 영향을 미치는 변인들 간의 유의성을 검증하기 위해 ETPB를 기반으로 PLS-SEM을 사용하여 실증적인 연구를 진행하였다. 첫째, 개인적 특성 변수인 친밀감, 사전지식과 인지된 기대편익 변수인 비용절감은 TPB 변수인 태도, 주관적 규범, 인지된 행동통제에 유의한 영향을 미친다는 것이 확인되었다. 둘째, TPB 변수들은 행동의도에 유의한 영향을 미치고 행동의도는 지속적 이용의도에 유의한 영향을 미친다는 것이 확인되었다. 셋째, 친밀감, 사전지식, 비용절감은 의료소비자들의 인식 전환을 기반으로 하는 행동의도의 매개를 통해 지속적 이용의도에 영향을 미친다는 것이 확인되었다. 본 연구는 의료소비자들의 행동의도를 통해 의료정보서비스 애플리케이션에 대한 지속적 이용의도에 미치는 영향을 도출하여 의료소비자들의 행태를 실증적으로 규명하였다는 점에서 그 의의를 찾을 수 있다.

• Journal of the Korean Wood Science and Technology
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• 제23권3호
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• pp.8-15
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• 1995

This analytical study was carried out to make quality and productivity up in designing the frame-type furniture with semi-rigid joint by understanding the mechanical and structural behavior of the joint and by evaluating the validity of application of the time-saving Finite Element Method to its structural analysis. Slope deflection equation for rigid joint was modified to describe the moment-rotation behavior of semi-rigid joint and the joint stiffness factor(Z) could be calculated to lessen the experimental expense. It was proved that Finite Element Analysis with imaginary elements having equivalent MOE to the semi-rigid joint could be the alternative method for the structural analysis of the frame-type furniture, comparing the internal rotation of the 2-dimensional beam-to-column model with two-pin(wooden dowel) from the finite element method with other available theoretical and experimental rotation value.