• Journal of Electrical Engineering and Technology
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• v.12 no.4
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• pp.1675-1682
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• 2017

This paper deals with three dimensional orientation estimation algorithm for an attitude and heading reference system (AHRS) based on nine-axis inertial/magnetic sensor signals. In terms of the orientation estimation based on the use of a Kalman filter (KF), the quaternion is arguably the most popular orientation representation. However, one critical drawback in the quaternion representation is that undesirable magnetic disturbances affect not only yaw estimation but also roll and pitch estimations. In this paper, a sequential direction cosine matrix-based orientation KF for AHRS has been presented. The proposed algorithm uses two linear KFs, consisting of an attitude KF followed by a heading KF. In the latter, the direction of the local magnetic field vector is projected onto the heading axis of the inertial frame by considering the dip angle, which can be determined after the attitude KF. Owing to the sequential KF structure, the effects of even extreme magnetic disturbances are limited to the roll and pitch estimations, without any additional decoupling process. This overcomes an inherent issue in quaternion-based estimation algorithms. Validation test results show that the proposed method outperforms other comparison methods in terms of the yaw estimation accuracy during perturbations and in terms of the recovery speed.

• Journal of the military operations research society of Korea
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• v.35 no.3
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• pp.139-156
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• 2009

This study reviewed influential factors on knowledge sharing and examined to verify how attitude and recognition serve toward security in knowledge-related activities. This two-part study will dedicate to diffusion of knowledge sharing in the ROK Army. The findings indicate that trust and computer self-efficacy are influential factors which cause increase in knowledge sharing intention. Friendly attitude of the members result in strengthening the knowledge sharing in National Defense Intranet. As a result, it could be inferred that organizational and systematic efforts are required to foster the knowledge sharing in the army and policy to induce members' friendly attitude toward security is in need as well.

• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.107-116
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• 2018

Purpose: The purpose of the study was to assess married couples' attitude toward family-birth according to the range of spouse's participation in family-birth. Method: Data were obtained by the 54 couples who used to visited in order to participate on family-birth at two teritary women's hospital in G-city. Result: There was a significant difference in pregnant woman's attitude : the status of having a job(Z=-2.01, p=.044) & type of nuclear family(Z=-2.17, p=.029), planned pregnance(Z=-2.54, p=.011). The spouse who partly participated in the process of family-birth showed higher(t=2.30, p=.030) compared to the spouse who participated in the whole process of family-birth. Conclusion: The results of the study suggest that hospitals and women's hospitals should support pregnant woman's social work and encourage spouse who partly participation and develop education programs.

• Journal of Korean Elementary Science Education
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• v.27 no.3
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• pp.273-286
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• 2008

The purpose of this study was to develop an instrument for assessing the attitude and the knowledge level of elementary school in-service and pre-service teachers' on the modem environmental issues, and to implement it. The results of this study could be summarized as following. First, the instrument for attitude was developed as a Likert-type scale, it was constituted of 30 items through the item-chosen processes to improve the validity and reliability. The Cronbach's Alpha coefficient of the attitude instrument was .899. Second, The instrument for knowledge was developed as a multiple-choice form with 와 distracts, and the final version was constituted of 35 items. The average discrimination, difficulty, and Cronbach's Alpha coefficient of the items were .367, .629, .899, respectively. Third, in-service elementary teachers have been thinking about the modern environmental problems more seriously than pre-service teachers. However, in-service teachers 'knowledge level was lower than pre-service teachers'. Fourth, women have been thinking about the modern environmental problems more seriously than men. However, there was no difference significantly between men and women on knowledge level. Fifth, This process of developing the instrument could be provided as a model for future research which will try to develop instruments for assessing attitude or knowledge of any new areas with constructs.

• The Journal of Information Systems
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• v.30 no.1
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• pp.85-104
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• 2021

Purpose This study aims to verify the mediating effect of the utilization performance of digital device on the relationship between user attitude and life satisfaction. Design/methodology/approach Using the data of 2018 Digital Divide Survey conducted by the National Information Society Agency(NIA), the mediating effect was verified by Baron & Kenny (1986)'s 3 step process, targeting 1,662 adults older than 55. Findings The result is as follows: first, the user attitude of middle and older aged people has a positive effect on their life satisfaction. Second, the effect of user Attitude towards Digital Device of middle and older citizens is partially mediated by the utilization performance of digital device. The results of this study indicate that when providing informatization education in the local community to promote the use of digital devices for the elderly, efforts should be made to grasp the level and inclination of informatization individually, and furthermore present improvements for wireless devices that the elderly can easily access in their daily lives. This study is expected to be a groundwork for a practical intervention to boost positive attitude towards using digital device to enhance the utilization performance of digital device and the life satisfaction of middle and older aged people.

• The Korean Nurse
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• v.35 no.4
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• pp.64-74
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• 1996

In general. social cognition for a disabled person seemed that he was limited aspects of emotion and psychology. Thus he was rejected. avoided. worthless and not accepted. People who have been raised in an ethnic collectivity often acquire from that experience not only basic conceps and attitudes toward health and illness but also fundamental styles of interpersonal behavior and concerns about the world. The effects of this enculuration carryover into health- care situation and also become an important influence on personal activities devoted to health maintenance and disease prevention. Our Korean culture is a state of tradition Confucianism. respects his honor and external feature. Therefore recognition of a disabled person is more specipic. This study uses Walker and Avant's process of concept analysis. The concep of recognition of disabilty can be defined as follows : Recognition of disability is a person's conscious process of sensation. perception. memory and thought and is constructed from value. attitude. emotion and expierince which is dynamics. and in everyday life is feeling that basic activity is not free and occurs interaction of envionment. Attributes of disability recognition are defined as 1) It is feeling that basic activity of his daily life is not free in everyday life. 2) It is a person's conscious process of sensation. perception. memory and thought. 3) It occurs interaction of enviornment. 4) It is constructed from value. attitude. emotion and experience. 5) it is dynamics ( changing but not stasis). Nurse is always suppoted and pushed him. She plans institutional and situational surroundings.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.24 no.3
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• pp.69-79
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• 2016

This study examines the awareness of the curriculum of the cabin service major students at 2 year colleges through the CIPP (Context, Input, Process, Product) evaluation model and an empirical analysis on how their awareness affects Service Orientation and Service Hospitality. It was proven that the CIPP evaluation model has a positive effect on the satisfaction of their department, and also has a meaningful effect on Service Hospitality and Service Orientation statistically. However, the satisfaction of their department itself is not associated with the increase of Service Orientation and Service Hospitality so it negatively affected them. Moreover, both the Service Management program(Process) and Service Attitude(Product) have a meaningful effect on Service Hospitality, and Service Hospitality also has a meaningful effect on Service Orientation. So it resulted in a casual relationship among them. As a result, it is desperately necessary to promote an educational environment that will increase the satisfaction of the department and help students to become flight attendants. It is also necessary to increase awareness of the Service Management program(Process) and Service Attitude(Product).

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.47 no.4
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• pp.289-299
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• 2019

Attitude control modeling and simulation (M&S) can be extensively applied in overall development process, from simple algorithm design to on-board software verification. This paper introduces CMG-based attitude control M&S software, which consists of 6-DOF modeling (CMG and space environments modeling), and attitude control algorithm. The M&S software is divided into three modules, from an inner CMG motor control module to an outer earth observation mission module. While an application of this developed software is currently limited to the initial-phase attitude controller development, its application area can be extended to the later-phases by considering sophisticated model information in future.

• Journal of the Korean Society of Earth Science Education
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• v.6 no.3
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• pp.221-234
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• 2013

The purpose of this study was to examine the impact of the application of a creative thinking technique for development on the creativity and attitude toward science of the students in elementary school. In order to better assist students' levels of creative thinking process, creative thinking techniques were reorganized based on the features of creative learning content in science textbooks. Furthermore, related units from an elementary science textbook were analyzed to map out the lesson plans. The findings of the study were as follows. First, the creative thinking technique developed in this study could be applicable to teaching-learning activities. When a creative thinking technique is applied, that should carefully be selected in consideration of all the creativity elements to be covered in class, and that should be used in a manner to be covered in class, and that should be used in a manner to be appropriate at learner level. Second, the utilization of the creative technique turned out to have a good impact on boosting the creativity of the elementary schoolers. Third, the utilization of the creative technique turned out to exert a good influence on fostering the school children's attitude toward science.

• Communications of Mathematical Education
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• v.22 no.2
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• pp.91-108
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• 2008

One of the essential factors for successful college mathematics class is to provide a strong motivation for learning to students. In this respect, this paper attempted to find out how the letter-writing assignment can change students' learning attitude and enhance their motivation for further mathematical investigation. The process is to have all students write up letters containing a summary of the major points covered during the semester, and to find out how valuable is the letter-writing assignment. The major finding of this research is that the letter-writing assignment makes a notable contribution to the desirable change of students' learning attitude. From this finding, we suggest that the letter-writing assignment be adopted by more math classes and expect that such expansion of the letter-writing assignment would have a positive influence on the students' learning attitude.