• KIPS Transactions on Software and Data Engineering
• /
• v.6 no.6
• /
• pp.315-320
• /
• 2017

Estimating the correct pose of augmented objects on the real camera view efficiently is one of the most important questions in image tracking area. In computer vision, Homography is used for camera pose estimation in augmented reality system with markerless. To estimating Homography, several algorithm like SURF features which extracted from images are used. Based on extracted features, Homography is estimated. For this purpose, RANSAC algorithm is well used to estimate homography and DCS-RANSAC algorithm is researched which apply constraints dynamically based on Constraint Satisfaction Problem to improve performance. In DCS-RANSAC, however, the dataset is based on pattern of feature distribution of images manually, so this algorithm cannot classify the input image, pattern of feature distribution is not recognized in DCS-RANSAC algorithm, which lead to reduce it's performance. To improve this problem, we suggest the KCS-RANSAC algorithm using K-means clustering in CS-RANSAC to cluster the images automatically based on pattern of feature distribution and apply constraints to each image groups. The suggested algorithm cluster the images automatically and apply the constraints to each clustered image groups. The experiment result shows that our KCS-RANSAC algorithm outperformed the DCS-RANSAC algorithm in terms of speed, accuracy, and inlier rate.

• Journal of dental hygiene science
• /
• v.13 no.3
• /
• pp.230-237
• /
• 2013

In this research, the degree of depression and death orientation of the 332 female students majoring in dental hygiene at colleges located in Gyeongsangbuk-do Province were examined and analyzed through a structured self-administered questionnaire from May to July, 2012, for the purpose of improving their mental health. The results are as follows: 1. The degree of depression of the subject students majoring in dental hygiene was shown that 59.9%, 36.8%, 3.0%, and 0.3% of the students were in the normal group, mild depression group, moderate level of depression group, and severe depression group, respectively. 2. The grand mean and the standard deviation of the subjects'death orientation was $2.09{\pm}0.62$ points. 3. The degree of depression of the subjects whose family's economic level was low, whose satisfaction with their family background was low, whose satisfaction level with their major was low, whose school records was low, who frequently thought about death, and who attempted suicide was high in a meaningful way, and death orientation was meaningfully low. In addition, those in the group with the experience of feeling suicidal were proved to have a significantly high degree of depression, and those without the experience of education about death had a low level of death orientation. 4. The degree of depression and death orientation had a positive correlation. When the study results above are combined, follow-up research needs to be conducted so that differentiated programs linked with the care for mental health for the formation of proper attitudes toward depression and death will be established to help students lead a positive life.

• KIPS Transactions on Software and Data Engineering
• /
• v.5 no.6
• /
• pp.307-312
• /
• 2016

Markerless tracking for augmented reality using Homography can augment virtual objects correctly and naturally on live view of real-world environment by using correct pose and direction of camera. The RANSAC algorithm is widely used for estimating Homography. CS-RANSAC algorithm is one of the novel algorithm which cooperates a constraint satisfaction problem(CSP) into RANSAC algorithm for increasing accuracy and decreasing processing time. However, CS-RANSAC algorithm can be degraded performance of calculating Homography that is caused by selecting feature points which estimate low accuracy Homography in the sampling step. In this paper, we propose feature point filtering method based on CS-RANSAC for efficient planar Homography estimating the proposed algorithm evaluate which feature points estimate high accuracy Homography for removing unnecessary feature point from the next sampling step using Symmetric Transfer Error to increase accuracy and decrease processing time. To evaluate our proposed method we have compared our algorithm with the bagic CS-RANSAC algorithm, and basic RANSAC algorithm in terms of processing time, error rate(Symmetric Transfer Error), and inlier rate. The experiment shows that the proposed method produces 5% decrease in processing time, 14% decrease in Symmetric Transfer Error, and higher accurate homography by comparing the basic CS-RANSAC algorithm.

• Physical Therapy Korea
• /
• v.26 no.3
• /
• pp.67-75
• /
• 2019

Background: Stress urinary incontinence (SUI) is an involuntary leakage of urine from the urethra when intra-abdominal pressure increases, such as from sneezing, coughing, or physical exertion. It is caused by insufficient strength of the pelvic floor and sphincter muscles, resulting from vaginal delivery, obesity, hard physical work, or aging. The pelvic floor electrical stimulator is a conservative treatment generally used to relieve the symptoms of urinary incontinence. it recommended to applied before surgery is performed. Objects: The purpose of this study was to determine if the transcutaneous electrical stimulation (TCES) would be effective for the physiological symptoms and psychological satisfaction of women with SUI for an 8-weeks intervention. Methods: Easy-K is a specially designed user-friendly TCES. Five female who were diagnosed with SUI by a gynecologist but who did not require surgical intervention were included in this study. Intervention was implemented over an 8-week period. Outcome measures included vaginal ultrasonography, Levator ani muscle (LAM) contraction strength, incontinence quality of life (I-QOL), and female sexual function index (FSFI) questionnaires. Results: The bladder neck position significantly decreased across assessment time. Funneling index and urethral width significantly decreased after 8 weeks of intervention (p<.05). The bladder necksymphyseal distance and posterior rhabdosphincter thickness statistically increased and the anterior rhabdosphincter thickness showed a tendency to increase. All participants demonstrated a significant increase in the LAM contraction score across three assessment times (p<.05). Although the total score of the I-QOL did not show significant improvement, it steadily increased and among I-QOL subscales, only the "avoidance" subscale showed statistical improvements (p<.05). The total score of the FSFI statistically improved and the "desire" score significantly changed (p<.05). Conclusion: The TCES is recommended for women who want to apply conservative treatments before surgery and who have suffered from SUI in aspects of sexual function and quality of life.

• Quality Improvement in Health Care
• /
• v.24 no.2
• /
• pp.26-40
• /
• 2018

Purpose: The objective of this study was to identify the relationship between knowledge of patient safety, nursing professionalism and patient safety management activities of nursing students with clinical practical experience. Methods: Self-administered questionnaires survey on knowledge of patient safety, nursing professionalism, and patient safety management activities were conducted for the $3^{rd}-year$ and $3^{th}-year$ nursing students. 139 questionnaires were distributed, of which, 131 were used for data analysis. Results: The scores of nursing students' knowledge of patient safety, nursing professionalism and patient safety management activities were $6.76{\pm}1.26$, $65.11{\pm}7.97$ and $67.99{\pm}7.26$, respectively. Knowledge of patient safety differed significantly according to the grade. Nursing professionalism had a difference with major satisfaction, clinical practical satisfaction, and experience of patient safety accident. Patient safety management activities were positively correlated (p<.01) with knowledge of patient safety and nursing professionalism. Patient safety management activities increased significantly with increase in the scores of knowledge of patient safety and nursing professionals. The factors that were related to patient safety management activities of nursing students were knowledge of patient safety and nursing professionalism. Knowledge of patient safety and nursing professionalism were selected as significant variables for explaining the patient safety management activities of nursing students, of which the coefficient of determination was 9.8%. Conclusion: To promote patient safety management activities of nursing students, training programs for patient safety management activities are required. Also, there is the need to increase the knowledge of patient safety and nursing professionalism of nursing students using various educational method.

• International Commerce and Information Review
• /
• v.18 no.3
• /
• pp.205-226
• /
• 2016

As knowledge workers have increased and information interchanges become more diverse, only the resources of internal enterprise is not longer useful, and the practical use of external information through information public sharing network is even more crucial. But, few studies that use both internal and external information sharing systems together have been conducted. In this research, we carried on the depth interview to analyze the main factors that intend to utilize outside information as well as to share inside information voluntarily. In conclusion, sharing internal information is directly involved with the performance of their job exchanging simple data, past documents, and technical materials. On the other hand, using the external information belonged to several other organizations is mostly caused by the voluntary participants' satisfaction sharing their individual experience through the network systems. Based on the study, we propose the idea that can activate both internal and external information sharing network through the system with user feedback function regarding the customized information, and with the space expansion where people can freely raise their private opinion. We also introduce the plan of the construction of communication systems with various experts, and the development of compatible devices with diverse interfaces.

• Smart Media Journal
• /
• v.13 no.4
• /
• pp.114-123
• /
• 2024

This paper proposes AR stone tower content, an experiential content based on wearable augmented reality (AR). Although wearable augmented reality is gaining attention, the acceptance of the technology is still focused on specialized applications such as industrial sites. On the other hand, the proposed AR stone tower content is based on the material of 'stone tower' so that general users can relate to it and easily participate in it, and it is organized to utilize space in a moving environment and find and stack stones based on natural hand gestures. The proposed AR stone tower content was implemented in the HoloLens 2 environment and evaluated by general users through a pilot exhibition in a small art museum. The evaluation results showed that the overall satisfaction with the content averaged 3.85, and the content appropriateness for the stone tower material was very high at 4.15. In particular, users were highly satisfied with content comprehension and sound, but somewhat less satisfied with object recognition, body adaptation, and object control. The above user evaluations confirm the resonance and positive response to the material, but also highlight the difficulties of the average user in experiencing and interacting with the wearable AR environment.