• Journal of Electrical Engineering and Technology
• /
• 제12권4호
• /
• pp.1675-1682
• /
• 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.

• 한국국방경영분석학회지
• /
• 제35권3호
• /
• pp.139-156
• /
• 2009

본 연구에서는 군 조직 내 지식공유의 확산을 위해 지식공유의 영향요인을 살펴보고 아울러 구성원들의 보안에 대한 태도와 인식이 국방인트라넷을 통한 실제 지식관련 활동을 하는 데 있어 어떠한 역할을 하는 지에 대해 검증하였다. 분석결과에 따르면 조직 내 신뢰와 컴퓨터에 대한 자기효능감이 지식공유의도를 높이는 영향요인으로 작용하였으며 조직구성원들의 보안에 대한 태도가 호의적일 경우 국방인트라넷을 통한 지식관련활동이 더 강화되는 결과를 도출하였다. 이에 따라 군 조직에서는 지식공유 확산을 위해 조직 및 제도적 측면에 대한 노력과 구성원들의 보안에 대한 태도를 호의적으로 유도하려는 노력이 필요하다.

• 한국융합학회논문지
• /
• 제9권6호
• /
• pp.107-116
• /
• 2018

본 연구는 가족분만에 배우자의 참여정도에 따른 부부의 분만에 대한 태도를 파악하기 위하여 시도하였다. 연구대상은 가족분만전체과정에 참여한 27쌍, 가족분만부분과정에 참여한 27쌍 총 108명이었으며 1차 자료는 가족분만 전에 직접수집하였고, 2차 자료는 가족분만 후에 이메일을 통해 수집하였다. 연구의 결과는 임산부의 직업(Z=-2.012, p=.044), 가족형태(Z=-2.177, p=.029)에 따라 분만태도에 유의한 차이가 있었고 계획된 임신에 따른 임산부의 가족분만 전 가족분만에 대한 태도에 유의한 차이가 있었다(Z=-2.543, p=.011). 배우자의 가족분만 참여범위에 따른 가족분만 전과 후의 가족분만에 대한 태도는 배우자가 가족분만 부분 과정에 참여한 경우 유의한 차이를 나타냈다(Z=2.302, p=.024). 본 연구 결과를 토대로 배우자에게 일방적으로 가족분만에 전 과정에 참여할 것을 제안하기보다 가족분만에 대한 배우자의 의견을 존중하여 참여의 범위를 정하도록 하는 것이 바람직하고, 가족분만 관련 산전교육의 기초자료를 개발하여 가족분만 전에 임산부와 배우자에게 가족분만에 대한 교육을 충분히 제공할 것을 제언한다.

• 한국초등과학교육학회지:초등과학교육
• /
• 제27권3호
• /
• pp.273-286
• /
• 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.

• 한국정보시스템학회지:정보시스템연구
• /
• 제30권1호
• /
• pp.85-104
• /
• 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.

• 대한간호
• /
• 제35권4호
• /
• pp.64-74
• /
• 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.

• 한국항공운항학회지
• /
• 제24권3호
• /
• pp.69-79
• /
• 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).

• 한국항공우주학회지
• /
• 제47권4호
• /
• pp.289-299
• /
• 2019

자세제어 M&S(Modeling & Simulation)는 모델링 정밀도에 따라 간단한 자세제어 알고리즘 설계부터 실제 탑재 소프트웨어 검증까지 활용될 수 있다. 본 논문은 CMG 기반 위성 자세제어를 위한 M&S 소프트웨어를 소개한다. 개발된 소프트웨어는 크게 6자유도 모델링과 자세제어 알고리즘으로 나뉠 수 있다. 6자유도 모델링은 CMG 구동기 모델링과 우주환경 모델링(궤도외란/자세외란)을 포함한다. 자세제어 알고리즘은 CMG 모터속도 제어기(내부루프)부터 토크명령생성 및 스티어링 법칙(외부루프)을 포함한다. M&S는 하위 레벨인 CMG 모터제어부터 상위 레벨인 지구관측임무 수행까지 단계적으로 수행되며, 적용 레벨에 따라 3개 모듈로 나뉜다. 본 M&S 소프트웨어는 초기 자세제어 알고리즘 개발을 목표로 개발되었는데, 향후 상세한 위성체/구동기 모델링 및 우주환경 모델링을 반영해 점차 활용 범위를 넓힐 수 있을 것으로 기대된다.

• 대한지구과학교육학회지
• /
• 제6권3호
• /
• pp.221-234
• /
• 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.

• 한국수학교육학회지시리즈E:수학교육논문집
• /
• 제22권2호
• /
• pp.91-108
• /
• 2008

대학수학 학습에서 성공하기 위한 중요한 요인 중의 하나는 학생들에게 강력한 학습동기를 부여하는 것이다. 여기서는 글쓰기 과제가 수학 학습의 동기를 불러일으키고 학생들의 학습태도를 어떻게 변화시킬 수 있는가를 알아보려고 한다. 수업시간에 일어난 또는 의논된, 강의된 내용 중에서 두, 세 개의 가장 중요하다고 여겨지는 주제를 골라 학생들이 보고 느낀 대로 요약하여 친구나 가족 또는 보내고 싶은 사람에게 편지를 쓰도록 하고 편지쓰기 반응과 편지쓰기 결과를 분석하여 편지쓰기 시도가 수학의 저변확대와 수학학습 태도의 긍정적인 변화를 불러오고 나아가 학습능력 향상에 도움을 주는지 알아보고 더 나은 방법을 찾아본다.