• Korean Journal of Applied Biomechanics
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• v.21 no.1
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• pp.47-55
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• 2011

The purpose of this study was to perform a kinematic analysis of Harai-goshi(hip throw) in superior female judo players. From our analysis, it appeared desirable for the player to shorten the duration of the technique for maximum results. It was also desirable for the player to draw the opponent backward while simultaneously maneuvering her close to her own body. A turning movement of the body toward the left side was found to be required for the technique, during which the player must lower the position of the center of gravity. During the subsequent angular change of the elbow, the player winds the elbow and, by moving the left shoulder, pulls the opponent toward her. The player lowers the body center by bending the left knee and letting the right knee extend, while turning the upper body and bending the hip joint. The player then draws the opponent in, contacts the opponent closely, turns, and stretches the right knee and hip joint rapidly and concisely, completing the move; it was also found to be desirable for the angular velocity to be increased for maximum efficacy.

• Korean Journal of Applied Biomechanics
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• v.27 no.4
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• pp.269-278
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• 2017

Objective: The purpose of this study was to develop a goal setting method for increasing the probability of a holed in a side inclined putting stroke. Method: Three-dimensional video data was recorded at a frequency of 120 hz per second after synchronizing 19 infrared motion capture systems (Qualisys, Gothenburg, Sweden). Putting green used a polycarbonate plate ($1.2{\times}2.4{\times}0.01meter$) with coefficient of friction (${\mu}=0.062$) and a real curve of the actual hole. Results: The velocity ratio between the club and the ball was 1:1.6 under various ball speed conditions in this study. The overall position of the break is 1 m to 1.4 m from the point where the ball leaves. If there is a slope, the ball follows the target line by the straightening force, and when it reaches 1 m position, the straightening force decreases by 30~50% and reaches to the deviation (break) point which is severely influenced by the slope. From here, the ball is aimed in a direction other than the target, and the size is affected by the slope. Conclusion: If there is a side slope, the ball moves away from the straight line, and the larger the slope, the closer the break point is to the starting point of the ball. Therefore, it is necessary to calculate the degree of departure according to the slope carefully, and it is preferable that the slower the speed is, the more the influence of the slope becomes. It is preferable to use the center of the hole as a reference when calculating the departure.

• Journal of the HCI Society of Korea
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• v.5 no.2
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• pp.1-6
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• 2010

In this research, we designed the head mouse system for disabled and gamers, a mouse controller which can be controlled by head movements and eye blinks only, and compared its performance with other regular mouse controller systems. The head mouse was moved by a gyro-sensor, which can measure an angular rotation of a head movement, and the eye blink was used as a clicking event of the mouse system. Accumulated errors caused by integral, which was a problem that previous head mouse system had, were removed periodically, and treated as dead zones in the non-linear relative point graph, and direct mouse point control was possible using its moving distance and acceleration calculation. We used the active light sources to minimize the influence of the ambient light changes, so that the head mouse was not affected by the change in external light source. In a comparison between the head mouse and the gazing tracking mouse (Quick Glance), the above method resulted about 21% higher score on the clicking event experiment called "20 clicks", about 25% higher on the dasher experiment, and about 37% higher on on-screen keyboard test respectively, which concludes that the proposed head mouse has better performance than the standard mouse system.

• Korean Journal of Adult Nursing
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• v.20 no.6
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• pp.852-865
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• 2008

Purpose: This study was designed to explore what experiences nurses had while caring and providing emotional support for patients. Methods: Participants were eight nurses working at hospitals for more than one year. Data were collected from June, 2006 to January, 2007 through in-depth interview by using tape-recordings. Data were analysed with the phenomenological method proposed by Colazzi(1978). Results: From significant statements, 4 clustered themes, 7 themes and 23 sub-themes were extracted from the essential meaning of the emotional experience of hospital nurses. The 4 clustered themes were 'movement of mind', 'affection and service for patients', 'worthwhile and conflict' and 'control oneself'. The 7 themes were 'special feeling', 'rapport formation', 'consideration', 'human interaction', 'value discovery', 'loss of volition', and 'keep to balance'. Conclusion: Although nurses had tough experiences for providing care for patients' emotional support, they had also experienced spiritual maturity from its experience. The result of this study would contribute for nurses not only to care for patients who need emotional support but also to develop knowledge in nursing.

• Fashion & Textile Research Journal
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• v.16 no.3
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• pp.421-433
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• 2014

The aim of this study was to provide compression wear manufacture brands with information needed for product development. 8 tops and 7 bottoms from widely recognized compression wear manufacture brands were selected, and their product structural elements were analyzed, too. The results showed that most compression wear designs were applications of cutting lines designed considering muscle movements of the human body. The average number of cutting lines for patterns and designs were 14 for tops and 15 for bottoms. Different colored material was mainly used on the top for areas that require ventilation or high movement during sports for tops, and for areas that require muscle and joint support during sports for bottoms. The functionality of top materials were found to be stretch, muscle support, moisture absorption and high speed drying, warmth and ventilation for tops, in order of frequency, and stretch, muscle support, moisture absorption and high speed drying, and pressure for bottoms, in order of frequency. Tops were cut in the direction of the lengthwise grain, and bottoms were not only cut in the direction of the lengthwise grain, but also in the direction of the crosswise grain and bias for many products. Tops consisted of an average of 13 organically connected panels, and bottoms consisted of an average of 18 organically connected panels, which was analyzed to improve functionality. The average clothing surface area stretch rate was 85.7% for tops and 70.0% for bottoms, indicating that bottoms were designed to have higher strain rates compared to tops.

• Women's Health Nursing
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• v.10 no.4
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• pp.301-310
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• 2004

Purpose: The purpose of this study was to develop an exercise program for postmastectomy patients. Method: This study was conducted from October, 2003 to June, 2004. The exercise program was developed based on literature review and needs assessment using focus group interviews. The subjects for the focus group interview consisted of 11 patients, 13 recovering patients, and 20 nurses from 3 hospitals. Development of the program was proceeded with analysusm design and development steps. Result: The results of the needs assessment using the focus group interview showed that the exercise program was imperative for postmastectomy patients. Based on the results, a home video tape containing 3 steps, was developed. Each step includes warming-up, stretching, the main exercise, and cool-down. Steps 2 and 3 include exercises with an elastic band, and an elastic ball. The program was modified after conducting a pre-test. A self-checklist including shoulder mobility, hand strength, arm volume and subjective comments on how they feel will be used before and after the exercise program. Conclusion: The exercise program will improve breast cancer patients' quality of life and their physical well-being. Further studies are recommended to test the effectiveness of the exercise program.

• The Journal of Pediatrics of Korean Medicine
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• v.14 no.2
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• pp.133-140
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• 2000

Purpose : Posterior Neck Pain and Back Pain are common diseases in human daily life. For reducting symptom and treatment of these diseases, many methods have been used and studied until now. The mechanisms of Ceragem Master Heat Bed(R)(Ceragem Co. Seoul, Korea) are infrared-heat therapy from natural nephrite and pressure therapy by up-down movement of natural nephrite ball. Through this study, authors would evaluate the clinical effectiveness of Ceragem Master Heat Bed(CMHB) on relieving posterior neck pain and back pain. Materials and methods : From 12-01-2000 to 01-13-2001, posterior neck pain and back pain patients were selected for experiment group(23patients) and control group(14patients). In both group, Visual Analog Scale(VAS) of pre-treatment stage is above 5 points. Experiment group were cared with acupuncture therapy, buhang therapy and CMHB. Control group were managed with only acupuncture therapy and buhang therapy. They were treated more than three times at least. At pre-treatment and post-treatment stage, we measured VAS for individual patients, and then compared effect of treatment in experiment group and in control group. Statistical analysis was preformed using SAS program. Results : In this study, a mean difference of VAS between pre-treatment and post-treatment stage was large in experiment(CMHB) group more than in control group(p〈0.01). Conclusion : Experiment(CMHB) group was more effective pain relief than control group in the treatment of posterior neck pain and back pain. CMHB was available for stimultaneous application of heat therapy and pressure massage together that gave another effects of mental stability and fatigue recovery. As the results of this study, CMHB could be used as a helpful treatment modality for posterior neck pain and back pain.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.6
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• pp.943-950
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• 2002

Real time strategy game is a computer game genre of Playing with human or computer opponents in real time It differs from turn-type computer games in the game process method. Turn type games, such as chess, allow only one Player to move at a time. Real time strategy games allow two or more Players to move simultaneously. Therefore, in real time strategy computer games, the game components' movement plans must be calculated very quickly in order to not disturb other processes such as gathering resources, building structures, and combat activities. There are many approaches, which can reduce the amount of memory required for calculating path, search space, and reactive time of components. (or units). However, existing path finding algorithms tend to concentrate on achieving optimal Paths that are not as important or crucial in real time strategy game. This Paper introduces Dynamic Heuristic Af(DHA*) algorithm which is capable of reducing search space and reactive time of game units and compares with A* algorithm using static heuristic weighting.

• Journal of Broadcast Engineering
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• v.15 no.3
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• pp.321-331
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• 2010

Most of multimedia video coding algorithms are lossy schemes and several kinds of spatial and temporal artifacts are inevitable. Flickering, which is the most typical coding artifact in time domain, is mainly due to fact that the quality of coded sequence fluctuates as the quantization parameter is adjusted for rate control. In this paper, we analyzed the effect of quality variation according to the characteristics of video sequence when the I-frames are periodically inserted. And we proposed the FR(Full Reference)-based assessment algorithm to measure the amount of flickering artifacts in the coded video. It is discovered that the flickering becomes critical when the level of quality is intermediate and is affected by the amount of detail or movement, the size of object, and camera parameters. The proposed measurement algorithm shows is well consistent with HVS(Human Visual System).

• Journal of the Korean Society of Costume
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• v.58 no.2
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• pp.162-180
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• 2008

The purpose of this study is to find the basic design factors that affect the changes in body surface lines caused by lower limb movements, thereby resulting in slacks that fit well regardless of whether the human form is static or in motion. Using unmarried female university students aged 18-24 as subjects, a total of 32 body surface lines (15 body surface total lines and 17 body surface segment lines) were measured in one static and 9 movement poses, The analysis first involved the calculation of the expansion and contraction rates per body part in body surface line in 9 lower limb movements, Second, a factor analysis was conducted using the expansion and contraction rates of these changes in body surface line. The results of this study are as follows, According to the factor analysis, basic design factors that affect changes in body surface lines comprised 8 types of factors as illustrated in fig, 2-fig, 9, which explained 79.2% of total variate for the variables studied, Factor 1, comprising the lower segment of center back leg line, center front leg line and inner leg line, and lower limb girth except midway thigh girth and ankle girth below hip girth, accounted for 30.3% of total variance, Factor 2, comprising waist girth, the total and upper segment of center back leg line and center tront leg line, and front and back segment of crotch length, explained 17.4% of total variance, Factor 3, the total and upper segment of lateral leg line at the center, accounted for 56.5% of total variance in accordance with Factors 1, 2, and 3, Factor 4 was the contracting upper part of lower leg between legscye girth and midway thigh girth, Factor 5 comprised the total and upper segment of inner leg line and posterior knee girth, Factor 6 was the total crotch length, Factor 7 was the ankle girth, Factor 8 was the abdomen girth.