• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.238-242
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• 1994

Shuster's algorithm for spin-axis determination is extended to include sensor bias and mounting angle as its solve-for parameters. The relation between direct and derived measurements bias is obtained by linearizing their kinematic equations. A one-step least-square estimation technique referred to as the 'closed form' solution is used, and the solution provides a more refined and decent initial guess for the subsequent filtering process contained within the differential correction module. The modified algorithm is applied for attitude determination of a GEO communication satellite in transfer orbit, and its results are presented.

• 지역사회간호학회지
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• 제16권3호
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• pp.308-319
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• 2005

Purpose: This study investigated knowledge and attitude of home visitors in public health centers toward wife abuse and the actual status of how they were detecting wife abuse and providing interventions. Method: Data were collected using questionnaires from October 2003 to December 2004. The subjects were 403 home visitors at Public Health Centers around Korea. The data were analyzed using SPSS program. Results: The correction rate of knowledge related to wife abuse was 51.9%. The mean score of attitude toward wife abuse was 3.09 (SD=.40) out of 4. showing that their attitude is right. There was a significant difference in attitude according to age (F=3.27, p=.008). One hundred twenty six visitors (31.3%) detected wife abuses and each visitor confirmed 2.3 cases on the average. Forty eight respondents (38.1%) answered that they had provided interventions. Conclusion: This result implies that health visitors have difficulties in detecting wife abuse, and even for identified cases, the rate of providing interventions was low. It was because health visitors' educational experience in wife abuse is insufficient and they do not regard this work as their duty. These findings suggest the necessity for developing nursing in-service programs teaching health visitors their duties and knowledge related to wife abuse.

• 전기학회논문지
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• 제68권1호
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• pp.108-121
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• 2019

This paper presents the study results on the design of the correction filter to improve the azimuth error estimation of the high-speed guided missile launched from the warship after the transfer alignment. We theoretically proved that the transfer alignment performance is determined by the accuracy of the marine inertial navigation system and the observability of the attitude error state variable in the transfer alignment filter, and that most of navigation errors in high-speed guided missile are caused by azimuth error. In order to improve the azimuth estimation performance of the correction filter, the multiple adaptive estimation method and the adaptive filters adapting the measurement noise covariance or the process noise covariance are proposed. The azimuth estimation performance of the proposed adaptive filter and the existing Kalman filter are compared and analyzed each other for 8 different transfer alignment accuracy cases. As a result of comparison and analysis, it was confirmed that the adaptive filter adapting the process noise covariance has the best azimuth estimation performance. These results can be applied to the design of correction filters for high-speed guided missile.

• 한국컴퓨터정보학회논문지
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• 제21권9호
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• pp.157-163
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• 2016

In this paper, I had studied to focus on the NCS(National Competency Standard) course in the development process of NCS-based curriculum and designed and developed 'Digital Color Correction' course. 'Digital Color Correction' course was come up with in process of development of NCS-based curriculum in a department of university that aims to educate video-broadcasting experts who lead the advanced digital age. The course developed in this paper follows criteria of NCS and is designed to step in course-profile, instruction and evaluation. Also I made an analysis of learning effects after applying to class. And I compared and analyzed NCS-class and non NCS-class. As a result of comparison, NCS-class is better than non NCS-class in student attitude for learning and evaluation method.

• 한국식품영양학회지
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• 제24권4호
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• pp.725-731
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• 2011

In this study, a survey was carried out on 300 students in Korea Culinary Arts Science High School located in Gyeonggi-do from August 1 to August 30, 2011 to figure out how the control of high school students' eating behavior affects the change of their psychological achievement. Analysis showed that attitude toward eating behavior, and perceived behavior that recognize this and act, as eating habits for control of their eating behavior, are the most control factors of eating behavior. It says that the right perception of customary attitude and the correction of habits according to the exposure and performance of repetitive eating behaviors are important. Consequently, an ordinarily regular norm as a social norm, or a rule around it won't act as big positive factors.

• 한국직업건강간호학회지
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• 제21권3호
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• pp.184-191
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• 2012

Purpose: This study was to examine the effects of 3 domains of continuing education (CE) for healthcare managers. Methods: A group of 20 healthcare managers, attending 3 levels of CE, were the subjects. The data were collected by structured questionnaires before and after each education. The data were analyzed by Friedman test, Wilcoxon Signed Ranked Test, and Bonferroni correction. Results: After completing CE, there was significant improvement on the scores of knowledge, attitude, and skills. Conclusion: This study suggests that CE for healthcare managers is an effective strategy to promote the competency of healthcare managers, who take care of the chronically ill patients.

• 센서학회지
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• 제27권2호
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• pp.86-92
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• 2018

In recent times, motion capture technology using inertial measurement unit (IMU) sensors has been actively used in sports. In this study, we developed a canoe paddle, installed with an IMU and a water level sensor, as a system tool for training and calibration purposes in water sports. The hardware was fabricated to control an attitude heading reference system (AHRS) module, a water level sensor, a communication module, and a wireless charging circuit. We also developed an application program for the mobile device that processes paddling motion data from the paddling operation and also visualizes it. An AHRS module with acceleration, gyro, and geomagnetic sensors each having three axes, and a resistive water level sensor that senses the immersion depth in the water of the paddle represented the paddle motion. The motion data transmitted from the paddle device is internally decoded and classified by the application program in the mobile device to perform visualization and to operate functions of the mobile training/correction system. To conclude, we tried to provide mobile knowledge service through paddle sport data using this technique. The developed system works reasonably well to be used as a basic training and posture correction tool for paddle sports; the transmission delay time of the sensor system is measured within 90 ms, and it shows that there is no complication in its practical usage.

• 대한원격탐사학회지
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• 제14권2호
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• pp.137-148
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• 1998

본 논문에서 고해상도 위성영상의 정밀 기하학적 보정에 대하여 기술한다. 일반적으로 GCP로부터 영상과 기준 지도 사이의 다하식을 유도하는 polynomial warping 방법인 경우 원하는 정확도를 얻기위해 영상 전체를 골고루 분포된 많은 GCP를 요구하게 된다. 하지만 제안되는 알고리즘은 위성-센서-궤도-지구 간의 기하학적 모델을 바탕으로 2-3개의 GCP만으로도 전체 영상을 매우 정확히 보정할 수 있다. 개발된 알고리즘은 GCP를 순차적으로 사용하여 부정확한 초기 궤도 및 자세 정보를 정밀하게 추정하고 이러한 추정은 Kalman filter를 사용하여 이루어진다. 이 알고리즘은 현재 우리별 3호의 전처리 소프트웨어에 통합되어 구현되어 있으며 앞으로 우리별 3호 영상뿐 아니라 다목적실용위성 영상의 정밀 기하학적 보정에 사용될 예정이다.

• Journal of Biosystems Engineering
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• 제37권6호
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• pp.342-351
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• 2012

Purpose: Aerial spraying with an agricultural unmanned helicopter became a new paradigm in the agricultural practice. Laterally tilting behavior of a conventional agricultural helicopter, resulting in the biased down-wash and uneven spray deposit is a physically intrinsic phenomenon while hovering and cruise flights. Authors studied and developed a roll-balanced agricultural helicopter with a raised pylon tail rotor system. In this study, the attitude of the roll-balanced helicopter was determined using the Kalman filter algorithm, and the quality of roll balancing of a bare-airframe helicopter was evaluated. Methods: Instantaneous attitudes were estimated using the advantage of gyroscope, followed by the long term correction and prediction using accelerometer data for the advantage of convergence. The attitudes of the fuselage were calculated by applying the Kalman filter algorithm. The spraying maneuver of the helicopter was performed at a field of 50 m long, and the attitude data were acquired and evaluated. Results: The determination of attitude using the inertial measurement unit(IMU) and Kalman filter was reliable and practical. The intrinsic attitude of the developed helicopter was stable and roll-balanced. The deviation of roll angle was ${\pm}6.3^{\circ}$ with an average of $0^{\circ}$, referring to roll-balanced. Conclusions: Handling quality of the roll attitude determined to be steadily balanced. The balancing behavior of the developed helicopter would result in an even spray pattern during aerial application.

• 예술인문사회 융합 멀티미디어 논문지
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• 제9권4호
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• pp.725-733
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• 2019

본 연구는 한국의 여가활동 참여자들의 여가태도가 심리적 행복감에 미치는 영향을 분석하는데 여가만족이 매개변인으로서의 효과를 검증하고자 한다. 본 연구의 대상자는 서울과 경기도에 거주하는 성인남녀 179명으로 편의표본추출법을 사용하여 모집하였다. 본 연구의 목적을 규명하기 위하여 SPSS 18.0과 AMOS 18.0 프로그램을 사용하여 빈도분석, 신뢰도 분석, 확인적 요인분석, 상관관계 분석, 구조방정식모형 분석 등을 사용하였다. 위와 같은 연구 과정을 거쳐 다음과 같은 연구결과를 도출하였다. 첫째, 여가활동 참여자의 여가태도는 여가만족에 긍정적인 영향을 미쳤다. 둘째, 여가활동 참여자의 여가태도는 심리적 행복감에 영향을 미치지 않았다. 셋째, 여가활동 참여자의 여가만족은 심리적 행복감에 영향을 미치지 않았다. 여가활동에 대한 참여자들의 태도, 즉 여가태도는 여가만족에 긍정적인 영향을 미쳤으나, 심리적 행복감에는 영향을 미치지 않았다. 여가만족은 여가태도와 심리적 행복감 간에 매개효과가 없는 것을 알 수 있다. 하지만, 여가태도가 여가만족에 영향을 미치는 것으로 보아, 지속적으로 여가활동에 참여할 수 있는 인프라 구축이 필요하다.