• Journal of Advanced Research in Ocean Engineering
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• v.1 no.4
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• pp.198-210
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• 2015

This paper presents the damage assessment of a free-fall dropped object on the seabed. The damage to a dropped object totally depends on the relationship between the impact energy and the soil strength at the mudline. In this study, unexpected dropping scenarios were first assumed by varying the relevant range of the impact velocity, structure geometry at the moment of impact, and soil strength profile along the penetration depth. Theoretical damage assessments were then undertaken for a free-fall dropping event with a fixed final embedment depth for the structure. This paper also describes the results of a three-dimensional large deformation finite element analysis undertaken for the purpose of validation. The analyses were carried out using the coupled Eulerian-Lagrangian approach, modifying the simple elastic-perfectly plastic Tresca soil model. The validation exercises for each dropping scenario showed good agreement, and the present numerical approach was capable of predicting the behavior of a free-fall dropped object.

• Journal of Korean Academy of Nursing
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• v.37 no.4
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• pp.478-489
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• 2007

Purpose: The purpose of this study was to determine the effects of a Health Maintenance Program on physical functions and mental health of the elderly in nursing homes. Method: Sixty elderly(over 65 years old) in a randomized control study participated in a 16-week group-based intervention including functional exercises and health education. The participants were divided into 3 groups(Health Maintenance Program Group, Supportive Music Exercise Group, and Control Group) of 20 elderly each. Data was collected from Dec. 1st, 2005 to Mar, 30th, 2006. Physical function of lower body strength was assessed using a 30-second chair test, flexibility was assessed using a sit-and-reach test, and static balance was assessed by the ability to balance on one leg with open and closed eyes. Depression was assessed using the Korean Form of the Geriatric Depression Scale and self esteem was assessed using Rosenberg's Self Esteem Questionnaire. Data was analyzed by Chi-square test, One-way ANOVA, and Repeated measure two factor analysis. Results: A Health Maintenance Program significantly increased muscle strength, flexibility and static balance, but depression and self-esteem scores were not significantly changed. Conclusion: Findings demonstrated that a Health Maintenance Program was more effective on physical function than mental health of the elderly in nursing homes.

• Journal of The Korean Society of Integrative Medicine
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• v.2 no.3
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• pp.39-48
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• 2014

Purpose : The purpose of this study was to identify the effect of lumbar stabilization exercise (LSE) and isometric lumbar strengthening exercise (ILSE) on lumbar strength and lumbar extension range in healthy young adults. Method : Ten healthy young adults (six males and four females) volunteered to carry out the LSE and ILSE program for two weeks. The subjects were randomly allocated to two groups: the LSE group (n=5) and the LSE plus ILSE group (n=5). The LSE consisted of 20 minutes of exercise related to lumbar stabilization, and the ILSE was composed of five minutes of isometric stabilization exercise with a specific device. Each group exercised three times per week for two weeks. Assessment tools were made using the subjects' isometric lumbar strength and lumbar extension range before and after the interventions. Results : Statistical analysis revealed significant differences in isometric lumbar strength and the lumbar extension range between before and after the interventions in each group (p<.05). Also, the lumbar extension range improved significantly in the LSE plus ILSE group compared to the LSE group; however, there was no statistically significant difference in the two groups' isometric lumbar strength (p>.05). Conclusion : The findings suggest that ILSE might be feasible in clinical settings by offering benefits for lumbar function. Future studies will be continued.

• Journal of the Korean Society of Physical Medicine
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• v.8 no.4
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• pp.513-523
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• 2013

PURPOSE: The purpose of this study was to investigate characteristics of the forced pulmonary function test effect and abdominal muscles activation by combined complex exercise with abdominal drawing-in maneuver training of chronic stroke patients. METHODS: 14 post stroke patients(10 males and 4 females) involved voluntary this study and we divided two groups into CEG(complex exercise group) and CEAG (complex exercise and abdominal drawing-in maneuver group).(n=7, per goup). Each groups implicated the 2 times, 30minute exercises for 6 weeks a day. The CEAG performed the complex exercise 15 minutes and 15 minutes of abdominal drawing-in maneuver. For data analysis, the mean and standard deviation were estimated; non-parametric independent t-test was carried out. RESULTS: According to the study, in the combined complex exercise with abdominal drawing-in maneuver group, FVC and activation of transversus abdominis/internal oblique were statistically significant difference compared to the complex exercise group. CONCLUSION: These results indicate that the combined complex with abdominal drawing-in maneuver was efficient in enhancing abdominal muscles activation and pulmonary function of chronic stroke patients.

• Korean Journal of Applied Biomechanics
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• v.22 no.3
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• pp.341-348
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• 2012

The purpose of this study was to compare the muscle activities of the thoracic extensor(TE) and lumbar extensor(LE) during trunk lift (TL) exercise according to exercise position. Seventeen healthy subjects with no medial history of back pain were recruited for this study. Subjects performed the TL exercise in prone, quadruped and heel-sitting positions. The activities of the TE and LE were measured using surface electromyography during TL exercise in each exercise position. A one-way repeated-measures analysis of variance (ANOVA) was used to compare the normalized muscle activities of the TE and LE and the TE/LE ratio. The results showed that there was not significant effect of exercise position on the muscle activities of TE(p>.05). However, there was significant effect of exercise position on the muscle activities of LE and the TE/LE ratio(p>.05). Post hoc pair-wise comparisons with Bonferroni correction showed that both muscle activities of LE and TE/LE ratio in prone position were significantly different in those in heel-sitting and quadruped positions, during TL exercise, respectively. The TE/LE ratio was the greatest for TL exercise in heel-sitting position. Therefore, for selective activation of the TE muscle, we recommend performing the TL exercise in heel-sitting or quadruped position.

• Journal of Korean Public Health Nursing
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• v.30 no.2
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• pp.247-258
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• 2016

Purpose: The purpose of this study was to evaluate the effects of a comprehensive exercise program for the prevention of urinary incontinence (UI), frailty, and depression, as well as the promotion of physical function in community-dwelling elderly female living alone. Methods: A nonequivalent control group pretest-posttest design was employed. The participants were 76 vulnerable elderly female with a mild-to-moderate urinary incontinence. The exercise group completed 12 weeks of a moderate intensity, comprehensive exercise program. Descriptive statistics, independent t-tests and ANCOVA were used for data analysis with SPSS. Results: Upon the completion of the 12-week exercise program, significant improvements for UI symptoms (p=.001), timed up and go (p<.001), frailty (p=.006), and depression (p<.001) were observed, but not for hand grip strength (p=.053). Conclusion: The findings of this study indicate that the 12-week comprehensive exercise program for the prevention of urinary incontinence had positive effects on improving UI symptoms, physical function, levels of frailty and depression in elderly women living alone. More prolonged exercise programs with other types of exercise should be developed for these vulnerable elderly women, and future studies are encouraged to confirm the effect of the comprehensive exercise program in other settings.

• Journal of Korea Multimedia Society
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• v.17 no.6
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• pp.741-750
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• 2014

This paper presents a real-time motion restoration system for people who need remedial exercise of musculoskeletal based on Inverse Kinematics. A new approach is suggested to recognize a gesture based on restored human motion which is calculated the 3D positions of intermediate joints using 3D positions of body features estimated from images. For generating the 3D candidate positions of intermediate joints which cannot be extracted from images, we apply an Inverse Kinematics theory to compute the target position of intermediate joints. And we can reduce the number of candidate positions by applying the various physical constraints of body. Finally, we can generate the more accurate final position using the Kalman filter for a motion tracking and the relationship between the previous frame information and the candidate positions. The system provide motion information which are rotation angle and height in real-time, therefore the rehabilitation exercises can be performed based on the information and figured out proper exercise for individual status.

• Korean Journal of Artificial Intelligence
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• v.5 no.1
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• pp.29-37
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• 2017

The range of problems that can be handled by the activation of big data and the development of hardware has been rapidly expanded and machine learning such as deep learning has become a very versatile technology. In this paper, mnist data set is used as experimental data, and the Cross Entropy function is used as a loss model for evaluating the efficiency of machine learning, and the value of the loss function in the steepest descent method is We applied the Gradient Descent Optimize algorithm to minimize and updated weight and bias via backpropagation. In this way we analyze optimal reliability value corresponding to the number of exercises and optimal reliability value without overfitting. And comparing the overfitting time according to the number of data changes based on the number of training times, when the training frequency was 1110 times, we obtained the result of 92%, which is the optimal reliability value without overfitting.

• Journal of the Korean Society of School Health
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• v.12 no.1
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• pp.143-148
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• 1999

The focus of this study is to introduce the relationship between the Forward Bending Test and scoliosis. Our research screening process was conducted on elementary fifth and sixth grade school children. X-ray analysis on students who tested positive on the Forward Bending Test showed a strong positive relationship between the two. Thus, it is desirable that local schools participate actively in taking the Forward Bending Test for early detection of scoliosis among school children. In addition, schools should educate their students technigues that prevent scoliosis and the progress of it by teaching technigues how to sit up as well as muscle enhancing exercises around the spine and pelvic area.

• Journal of the Korea Fashion and Costume Design Association
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• v.15 no.2
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• pp.65-75
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• 2013

As a typical subculture, Goth exercises influence on our culture in broad areas. Features of Gothic style, such as dark aesthetics, images of death and fear, and erotic horrification, emerged as attractive themes to contemporary fashion designs. Based on the dark attraction of black color, Goth fashion creates mysterious and fantastic atmosphere as well as grotesque and horrifying mood. 'Hallyu' or Korean wave is a term to describe the phenomenon of fervently loving Korean popular culture. As the fast spreading Hallyu is strongly engraved through the visually conspicuous fashion, we can say that fashion plays important role in diffusing Hallyu. In addition, a number of analyses and researches on the Hallyu, including K-pop, have been conducted, while concentrating keen interest in fashion of Hallyu K-pop stars. Accordingly, this study is designed to examine relations between fashion of K-pop stars and Goth fashion after analyzing features of Hallyu and K-pop and contemplating Goth fashion. Namely, this study will analyze various Goth images shown in K-pop fashion, which is the core of Hallyu, and identify aesthetic features of Goth shown in the fashion of K-pop stars. An investigation and analysis of the Goth images shown in the fashion of K-pop stars identifies the following features : a black aesthetic, eroticism, defiance, reversal of gender identity, and mystery.