• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.4
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• pp.276-284
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• 2020

The purpose of this study was to provide basic data on hand washing of physical therapists by examining their awareness and practice of hand washing according to proper clinical practice. A total of 536 questionnaires were collected from physical therapy students in Gwangju metropolitan city. The general characteristics of the subjects were calculated by frequency analysis, and the awareness and practice of hand washing with and without clinical practice were analyzed by independent t-tests. As a result of analyzing hand washing awareness according to the clinical practice, there was a significant difference in hand washing up to the wrist (p<0.05), and a significant difference in 6 stages of proper hand washing (p<0.01). As a result of analyzing hand washing practice according to clinical practice, there was a significant difference in hand washing before eating and starting clinical practice (p<0.05), a significant difference in washing hands after contacting clinical practice equipment and washing your fingers from your thumb down (p<0.01). As a result of analyzing the correlation between awareness and practice, most showed positive correlation. This means it is important to raise the awareness of proper washing hands. Therefore, it is believed that the training school should repeatedly conduct its own hand washing training within the school and in clinical practice to increase awareness and improve handwashing in clinical practice.

• Journal of the Korean Society of Radiology
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• v.14 no.1
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• pp.7-14
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• 2020

The purpose of this study is to assess the usefulness of IR to compensate for uncertainties in inserting high density artificial objects in radiation treatment planning in the 3D-CRT treatment technique. CT images of the subjects with phantom and titanium inserted were obtained from images without IR and images with IR, and the dose evaluation factors HI, MU and volume evaluation factors Volume and PCI were compared. The results of the stainless steel and titanium phantom experiments showed that the volume of high density artificial material was reduced by 4.850% and 11.456% respectively when applying IR. MU decreased 0.924% and 1.181%. HI was down 0.106% and 0.272%. PCI decreased 0.358% and 0.867%. When IR was applied to CT images of subjects with vertebroplasty, Femur alignment pin and wrist alignment pin, the volume of artifacts decreased by 47.76%, 23.841%, and 49.339%. MU also decreased 0.924%, 0.294% and 1.675%, while HI decreased 1.232%, 0.412% and 1.695%. PCI decreases 4.022%, 0.512%, and 13.472%. In conclusion, When IR was applied to 3D-CRT treatment plan, both dose and volume in phantom and subject case with high density artificial insert were reduced.

• Journal of muscle and joint health
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• v.8 no.2
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• pp.262-277
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• 2001

The purpose of this study was to investigate the health status and to examine the relationship between health related variables of the clients with arthritis. This descriptive-correlational study was measured physical health status(pain, fatigue, physical disability, joint flexibility) and psycho-social health status(social function disability, self-efficacy, depression). The clients were consisted of 127 arthritis clients who were randomly selected from health center, 2 sub health center and 6 primary health care center in Wonju City. The data was collected from November 2000 to January 2001. The results of the study analyzed using a SPSS win were as follows: 1) The subjects' average age was 64.81 years old(female: 86.6%, male: 13.4%). 2) In physical health status, the average score of fatigue was 63 scores and pain was 69.77. Physical disability score was higher than total disability score. In psychosocial disability, housekeeping management disability score was higher than social function disability score. In psycho-social health status, the average score of self-efficacy was 70.86 and the subjects have higher level of depression, more than 20 scores. 3) On pain sites, almost of subjects complained of a knee joint pain. The waist, wrist, and shoulder joint pain were followed. The numbers of pain site were 8.3 per individuals. 4) The flexibility of knee and shoulder joint were lower than another joints. 5) Correlation with fatigue, pain, physical disability, social disability, self-efficacy and depression was revealed highly significant. We suggest that health promotion program considering our research results should be provided for arthritis clients in community level.

• Korean Journal of Applied Biomechanics
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• v.19 no.1
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• pp.77-85
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• 2009

This study is aimed at providing information on injury prevention and skill improvement by inducing the accurate movements in exercise as well as understanding the principles of badminton drive movements. Movement displacement of racket head showed the similar patterns among those surveyed but, it seemed that slight differences resulted from external factors such as height, length of brachial and forearm and individual trend of swing locus. Regarding upper joint angle per phase, the angles of shoulder joint, elbow joint and wrist joint were closely associated in taking drive movements and they supported the segment order theory that power was conveyed from proximal into distal. It was shown that angular velocity of upper joint became larger in follow through movement after impact among all those surveyed, which meant the importance of follow through in racket sports such as badminton. In conclusion, this follow through movement acts as an important factor in racket sports in terms of pose stability maintenance, pose correction of movements and injury prevention of joints. In summary, when swings are made according to segment order theory, efficient movements can be taken.

• Journal of the Korean Society of Radiology
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• v.6 no.1
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• pp.53-61
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• 2012

This study was conducted to survey of the musculoskeletal disorders of radiological technologists and prevalence rate survey tool of musculoskeletal symptoms targeting the radiological technologists working currently in hospitals or clinics. For this study, survey was conducted from July 10th, 2011 to July 31st, 2011 for about 20 days with subject of radiological technologists in private clinics, hospitals, general hospitals and University hospitals. The main results of this study are as follows : First, frequency analysis on presence of musculoskeletal symptoms in each part of body showed that neck area was 22.5 %, shoulder area was 33.1 %, arm / elbow area was 8.3 %, hand / wrist / finger area was 15.5 %, waist area was 32.4 %, leg / foot area was 16.9% (p<0.05). Second, the results from summarizing the descriptive statistics of job stress, psychosocial stress and fatigue showed that the average of job stress was 2.48 out of Likert 4 points scale, the average of psychosocial stress was 2.27 out of Likert 4 points scale. Job stress was a little bit higher than the psychosocial stress. In case of fatigue, the average was 4.57 out of Likert 7 points scale and it was a slightly higher than 'normal' (p<0.05). In conclusion, we hope this study will be helpful to systematically and efficiently manage the resources as the basic material upon deploying the preventive measures about the musculoskeletal disorders of radiological technologists in the future.

• Therapeutic Science for Rehabilitation
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• v.9 no.4
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• pp.7-20
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• 2020

Objective : This study aimed to investigate the effect of simultaneous application of peripheral nerve sensory stimulation and task-oriented training on the improvement of upper extremity motor function after stroke. Methods : This study included 29 patients with hemiplegia. The 14 subjects were in the peripheral nerve sensory stimulation and task-oriented training group for 4 weeks (30 min/d, 5 d/wk), while the 15 control group subjects underwent only task-oriented training for the same duration. The outcome measures were the percentage of voluntary baseline muscle contractions of the wrist and shoulder and Box and Block Test, grip and pinch strength, and Action Research Arm Test. Results : After 4 weeks, muscle activity of extensor carpi radialis, flexor carpi radialis and grip strength and Action Research Arm Test were significantly higher in the experimental group. Conclusion : Simultaneous application of the peripheral nerve sensory stimulation and task-oriented training was found to be superior to task-oriented training for improving upper extremity motor function of adults with stroke.

• Journal of the Korea Society of Computer and Information
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• v.25 no.8
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• pp.129-135
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• 2020

This study is to identify the awareness and performance of hand washing according to the presence of clinical practice experience of paramedic students and provide basic data of education on hand washing that can be practically applied. 335 students in paramedicine department in P city and J city were the study subjects and we distributed URL to those who agreed to participate in the study to carry out untact survey using questionnaire. The study results were analyzed by using SPSS/WIN 23.0. The results showed that the average number of hand washing per day was 5~8 times (142 students, 42.4%) and average time for washing hands was 24.34 seconds. We could find statistically significant differences in 'hand washing to wrist' and 'it is necessary to completely dry after hand washing' in terms of difference on awareness of hand washing according to the clinical experiences (p<0.05). In terms of differences in hand washing performance according to clinical practice experience, statistically significant difference was found in 'before touching equipment for clinical practice' and 'before taking foods such as drinks during practice' (p<0.05). The correlation between awareness and performance of hand washing showed that if awareness of hand washing is high, its performance is increased, too (p=0.001). We try to provide basic data of education on hand washing that can improve awareness and performance on hand washing based on the results of this study.

• Physical Therapy Korea
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• v.16 no.2
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• pp.67-76
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• 2009

In order to prevent upper extremity musculoskeletal disorders, effective keyboard selection is an important consideration. The aim of this study was to compare upper extremity muscle activity according to transverse plane angle changes during vertical keyboard typing. Sixteen healthy men were recruited. All subjects had a similar typing ability (rate of more than 300 keystrokes per minute) and biacromion and forearm-fingertip lengths. Four different types of keyboard (vertical keyboard with a transverse plane angle of $60^{\circ}$, $96^{\circ}$, or $120^{\circ}$, and a standard keyboard) were used with a wrist support. The test order was selected randomly for each subject. Surface electromyography (EMG) was used to measure upper extremity muscle activity during a keyboard typing task. The collected EMG data were normalized using the reference contraction and expressed as a percentage of the reference voluntary contraction (%RVC). In order to analyze the differences in EMG data, a repeated one-way analysis of variance, with a significance level of .05, was used. Bonferroni correction was used for multiple comparisons. There were significant differences in the EMG amplitude of all seven muscles (upper trapezius, middle deltoid, anterior deltoid, extensor carpi radialis, extensor carpi ulnaris, flexor carpi radialis, and flexor carpi ulnaris) assessed during the keyboard typing task. The mean activity of each muscle had a tendency to increase as the transverse plane angle increased. The mean activity recorded during all vertical keyboard typing was lower than that recorded during standard keyboard typing. There was no significant difference in accuracy and error scores; however, there was a significant difference between transverse plane angles of $60^{\circ}$ and $120^{\circ}$ with regard to comfort. In conclusion, a vertical keyboard with a transverse plane angle of $60^{\circ}$ would be effective in reducing muscle activity compared with vertical keyboards with other transverse plane angles.

• Korean Journal of Applied Biomechanics
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• v.16 no.2
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• pp.97-108
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• 2006

C. H. OH, S. N. CHOI, T. G. NAM, The Kinematic Analysis of the Tennis Flat Serve Motion, Korean Jiurnal of Sports Biomechanics, Vol. 16, No. 2, pp. 97-108, 2006. By the comparison and the analysis of the different factors during the tennis flat serve motion such as the required time per section, the movement displacement of the racket, the velocity of the upper limbs joints, the physical center of gravity, and the angle and the angular velocity of the upper limbs joints between an ace player and a mediocre player, these following results were drawn. First, the experiment result of the total time required per section in a tennis flat serve motion showed that an ace player was faster than a mediocre player by 0.4 seconds. This result suggested that it was required to increase the speed of the racket head by a swift swing to perform an effective flat serve motion. Second, the experiment result of the movement displacement of the racket in the tennis flat serve motion showed that an ace player greatly moved toward the left side on an x-axis. But both an ace and a mediocre player were shown to be at the similar points on a y-axis at the moment of the impact of the racket. An ace player was also shown to be located at a higher position on a z-axis by 0.23m. Third, the velocity of the center of gravity of an ace player was faster in every phase than that of a mediocre player in a tennis flat serve motion. Fourth, the velocity of the upper limb joints of an ace player was faster in every phase than that of a mediocre player in a tennis flat serve motion. Fifth, the experiment result of the speed of the racket head in tennis flat serve motion showed that a mediocre player was faster than an ace player in the first phase, but the latter was faster than the former in the second, third, and the fourth phases. Sixth, at the moment of impact of a tennis flat serve, an ace player had greater flexion of the angle of the wrist joints by an 11.8 degree than a mediocre player. An ace player also had greater extension of the angle of the elbow joint and the shoulder joint respectively by a 5.2 degree and a 1.4 degree with a mediocre player. Seventh, an ace player had greater angular velocity of the upper limb joints and the hip joints than a mediocre player at the moment of the impact of tennis flat serve. Eighth, an ace player was shown to have a greater change of the forward and the backward inclination (or the anterior and posterior inclination) of the upper body

• Korean Journal of Applied Biomechanics
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• v.19 no.2
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• pp.337-345
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• 2009

The purpose of this study were to find out the differences in kinematic variables of racket movement by performing the tennis serve. Three top male tennis players participated in this study. Three synchronized high-speed cameras were used to record the service action of top players for Three dimensional video analysis. The results of this study showed that (1) the velocity of the tennis racket at impact is important to the generation of racket velocity to Y-axis. This result indicates that forward motion and upward movement of the racket; (2) with respect to racket angular velocity at impact, the fast angular momentum of X-axis is important to generate the velocity of the tennis ball. This result indicate upward movement of the racket with a strong flexor of wrist joint; (3) the velocity of the tennis ball was influenced by the change of angular linking the Z-axis to -X-axis. This result indicates that the high velocity of the tennis ball is obtained from having the racket unitedly moving to the direction of the bill's flight at the acceleration interval and acquiring the distance of acceleration with the racket head vertically to the ground at the back scratching.