• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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• pp.35.3-36
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• 2008

The ground-based spacecraft simulator is a useful tool to realize various space missions and satellite formation flying in the future. Also, the spacecraft simulator can be used to develop and verify new control laws required by modern spacecraft applications. In this research, therefore, Hardware-in-the-loop (HIL) simulator which can be demonstrated the experimental validation of the theoretical results is designed and developed. The main components of the HIL simulator which we focused on are the thruster system to attitude control and automatic mass-balancing for elimination of gravity torques. To control the attitude of the spacecraft simulator, 8 thrusters which using the cold gas (N2) are aligned with roll, pitch and yaw axis. Also Linear actuators are applied to the HIL simulator for automatic mass balancing system to compensate for the center of mass offset from the center of rotation. Addition to the thruster control system and Linear actuators, the HIL simulator for spacecraft attitude control includes an embedded computer (Onboard PC) for simulator system control, Host PC for simulator health monitoring, command and post analysis, wireless adapter for wireless network, rate gyro sensor to measure 3-axis attitude of the simulator, inclinometer to measure horizontality and battery sets to independently supply power only for the simulator. Finally, we present some experimental results from the application of the controller on the spacecraft simulator.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.603-611
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• 2021

This study aims to analyze the mediating influences of resonance-based self-attitude and brand credibility in a relationship between celebrity endorser credibility and celebrity endorser congruity toward brand purchase intention in the current dynamic business environment. It employs a quantitative research method and reports on a survey, using a questionnaire, including the population of consumers of various instant coffee brands in several cities in Indonesia. The number of respondents in this study was 432 people. The analysis was performed using Partial Least Square Structural Equation Modeling and SmartPLS software. The analysis consisted of descriptive statistics, evaluation of the measurement model, evaluation of the structural model, and hypothesis testing. The results partially support the model developed. The findings suggest that the instant coffee product advertising in Indonesia needs to create brand messages focusing on the formation of resonance-based self-attitude from consumers to increase the influence of celebrity endorser credibility and celebrity endorser congruity, as well as the brand credibility towards the brand purchase intention. This study contributes to the marketing literature and the theory of planned behavior by providing empirical evidence on the relationship between celebrity endorser credibility, celebrity endorser congruity, resonance-based self-attitude, brand credibility, and brand purchase intention.

• 경영과정보연구
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• 제29권3호
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• pp.123-146
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• 2010

본 연구는 온라인 브랜드 커뮤니티 사이트를 통해 경험한 브랜드 체험의 세 가지 유형(이성적 체험, 정서적 체험, 관계적 체험)들이 브랜드 태도와 브랜드 애착 형성에 어떠한 역할을 수행하는지에 대해 살펴보는 것이다. 또한 브랜드 체험을 통해 형성된 브랜드 태도와 브랜드 애착이 브랜드 몰입에 어떠한 영향을 미치는 지에 대한 실증적인 규명을 하는 데 목적을 두고 있다. 연구결과 이성적 체험은 브랜드 애착보다는 브랜드 태도에 영향을 미치는 것으로 나타났다. 반면, 정서적 체험은 브랜드 태도보다는 브랜드 애착에 유의한 영향을 미치는 것으로 나타났다. 그리고 관계적 체험 역시 브랜드 태도보다는 브랜드 애착에 보다 강력한 영향을 미치는 것으로 나타났다. 다음으로 브랜드 체험을 통해 형성된 브랜드 태도와 브랜드 애착에 브랜드 몰입에 어떠한 영향력 차이가 나타나는지 실증적으로 분석하였다. 연구결과 브랜드 태도가 브랜드 몰입에 영향을 미치지 못하였으나 브랜드 애착은 브랜드 몰입에 영향을 미치는 것으로 나타났다.

• 한국군사과학기술학회지
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• 제10권2호
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• pp.160-169
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• 2007

In this paper, we have described and simulated the effect analysis and correction of phase errors in the SAR rawdata induced by satellite attitude errors such as drift, jitter. This simulation is based on the FSA(Frequency Scaling Algorithm) for high resolution image formation of the Spotlight SAR. Phase errors produce the degradation of SAR image quality such as loss of resolution, geometric distortion, loss of contrast, spurious targets, and decrease in SNR. To resolve this problem, this paper presents method for correction of phase errors using the PGA(Phase Gradient Algorithm) in connection with the FSA. Several results of the phase errors correction are presented for Spotlight SAR rawdata.

• Asian Journal for Public Opinion Research
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• 제10권3호
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• pp.149-177
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• 2022

This study analyzes how inoculation affects the spiral of silence. Inoculation could be a beneficial tool in a democracy as it elevates citizens' resistance to attitude change "forced" by "the winning opinion" in the spiral of silence on a certain controversial issue. The study examines essential variables combined with the theories of inoculation and spiral of silence, such as resistance to counter-attitudinal attack, fear of isolation, and issue-involvement. A two-wave field experiment was employed to assess the formation of public opinion on Taiwan's political future with the People's Republic of China. Results support that inoculation enhanced people's resistance to attitude change and decreased their fear of isolation. Individuals who are more issue-involved were also shown to be more affected by inoculation, which allowed them to resist attitude change. The decreased fear of isolation, coupled with more issue involvement, might elevate people's willingness to speak out in public. More political discussions regarding an important public issue might be expected in a democracy.

• Asian Journal of Business Environment
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• 제14권1호
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• pp.31-37
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• 2024

Purpose: The study aims to identify the factors contributing to the formation of entrepreneurial intentions among recent university graduates. The original value of this study lies in providing support and a better understanding of the entrepreneurial decision-making process of Vietnamese fresh graduates. Research design, data and methodology: The research methodology employs Exploratory Factor Analysis (EFA) with a sample size of 385 university graduates in Vietnam. Results: The results indicate that three key factors, including relational support, educational support, and attitude towards business, positively impact entrepreneurial intentions. Conclusions: The managerial implications are provided to promote entrepreneurial intention among recent university graduates.

• 한국과학교육학회지
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• 제32권6호
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• pp.1027-1038
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• 2012

We investigated the effect of Science Writing Heuristic (SWH) on elementary students' concept formation and their retention. Also we explored the interaction effect of those with scientific attitudes. We developed mirrors/lenses lessons incorporating SWH. An experimental group of fifth grade students (n=25) had been instructed with SWH lessons for six periods while a control group (n=25) taught according to the normal science lessons based on the Korean national curriculum using teacher's guides published by the Ministry of Education. Results of pre- and post-test of understanding the concept of mirrors and lenses showed a positive impact of SWH on both male and female students. However, the retention effect after post-test revealed that SWH only had an effect on female students' scientific attitudes. SWH, therefore, could be an effective teaching approach especially on concept formation, retention effects by fostering female students' scientific attitudes.

• 한국콘텐츠학회논문지
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• 제21권2호
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• pp.676-685
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• 2021

본 연구의 목적은 중년기 성인의 좋은 죽음 인식, 사전의료의향서 지식이 사전의사결정 태도에 미치는 영향을 파악하기 위함이다. 자료 수집은 경기도, 충청도에 거주 중인 중년기 성인 152명을 대상으로, 2019년 10월 4일부터 11월 15일까지 자가 보고식 설문조사로 시행되었다. 수집된 자료는 기술통계, t-test, ANOVA, Pearson correlation coefficient, stepwise regression으로 분석하였다. 연구결과, 중년기 성인의 좋은 죽음 인식은 사전의료의향서 지식, 사전의사결정 태도와 양의 상관관계를 보였으며, 사전의료의향서 지식은 사전의사결정 태도와 양의 상관관계가 나타났다. 대상자의 경제상태, 사전의료의향서 지식, 좋은 죽음 인식이 사전의사결정 태도에 영향을 주는 요인으로 확인되었으며, 중년기 성인의 사전의사결정 태도에 대해 약 28.3%의 설명력을 나타냈다. 본 연구결과는 중년기 성인의 경제상태, 사전의료의향서 지식, 좋은 죽음 인식이 바람직한 사전의사결정 태도 형성을 위해 고려해야 할 주요한 요인임을 제시하였다.

• 한국콘텐츠학회논문지
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• 제21권8호
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• pp.629-639
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• 2021

본 연구의 목적은 간호대학생의 치매지식, 연령주의, 휴머니즘이 치매노인에 대한 태도에 미치는 영향을 파악하기 위함이다. 자료수집은 서울, 충청남도 소재 대학에 재학 중인 간호대학생 226명을 대상으로, 2020년 9월 7일부터 12월 15일까지 자가 보고식 설문조사로 시행되었다. 수집된 자료는 기술통계, t-test, ANOVA, Pearson correlation coefficient, stepwise regression으로 분석하였다. 연구결과, 간호대학생의 치매지식은 연령주의와 음의 상관관계, 연령주의는 치매노인에 대한 태도와 음의 상관관계를 보였으며, 치매지식, 휴머니즘은 치매노인에 대한 태도와 양의 상관관계가 나타났다. 대상자의 연령주의, 휴머니즘, 치매교육을 받은 경험, 치매노인 동거경험, 치매노인 자원봉사 경험이 치매노인에 대한 태도에 영향을 주는 요인으로 확인되었으며, 간호대학생의 치매노인에 대한 태도에 대해 약 26.5%의 설명력을 나타냈다. 본 연구결과는 간호대학생의 연령주의, 휴머니즘, 치매교육 및 치매노인 봉사 프로그램이 바람직한 치매노인에 대한 태도 형성을 위해 고려해야 할 주요한 요인임을 제시하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제15권1호
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• pp.203-210
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• 2023

As the environment changes become more complex, learners should establish the learning strategy for the 4th industrial era and the post-COVID-19, also change. This paper focuses on the importance of self-regulated learning. Through this learning strategy, learners will form more positive attitudes and reduce negative attitudes toward the 4th industrial era. This attitude change will lead to an improvement in learners' career decision-making efficacy as a sense of future efficacy. As a result of the study, it was demonstrated that self-regulated learning improves career decision-making efficacy through the mediating effect of positive attitude formation toward the fourth industry. This article emphasizes the necessity of self-regulated learning as a valid learning strategy for the new era. The effect of self-regulated learning is explained as an improvement in attitude toward the future and a sense of efficacy. Through this learning strategy, learners' future performance could be improved.