• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.643-644
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• 2006

The purpose of this study is to experimentally analyze swing motion with soft golf clubs and compare with that with normal golf clubs. Soft golf is newly devised recreational sport based on golf but focus on the playability for the elderly. The subject fur the experiment performed swing motion using a normal golf club and a soft golf club in turn. The swing motion of the subjects was tracked using an opto-electric three-dimensional motion analysis system. The results were compared against those obtained with a normal golf club. The range of motion was analyzed along with top head speed for two cases. It was found that higher club head speed could be achieved with reduced range of motion at lumbar joint using soft golf club when compared against the swing using regular club. The lower range of motion fur lumbar bending means reduced risk of injury at the joint. So, it is projected that we can reduce the risk of injury with soft golf while maintaining the club head speed.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.25 no.5
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• pp.329-337
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• 2016

The demand for the eco-friendly vehicles is skyrocketing because of the increasing $CO_2$ emissions and global warming. In the industrial field, the battery process, a core part of an eco-friendly vehicle, is drawing increased attention; its weight lightening as well as high energy density are becoming increasingly important. In this study, pure Ni plates that were used as the battery pole plate were welded using the laser. The lab joint welding was conducted on ten pure Ni plates at a laser power of 1900 W and a feed speed of 2.8-3.4 m/min. As observed in the experiment, a faster feed speed reduced the bead width, but the laser did not penetrate all ten specimen plates. In addition, pores were trapped when protective gas was used, but they were not trapped when the welding was conducted in atmospheric condition.

• Journal of muscle and joint health
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• v.9 no.1
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• pp.53-67
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• 2002

Osteoporosis is a age-related metabolic disorder. Currently there is no cure, but there are measures that can prevent or deter the development of osteoporosis. Futhermore lifestyle among risk factors of osteoporosis may be modifiable. Osteoporotic preventive health promotion behavior may be more effective at early adult when make formation of peak bone mass. The purpose of this study was to identify of relation between the demographic variable, osteoporosis-related lifestyles and the health promotion behavior of University and College Female Students. The results were followed: 1. Demographic variables according to the health promotion behavior were significantly difference with age, body height, religion and income. 2. Osteoporosis-related lifestyles according to the health promotion behavior were significantly difference with element school milk intake, current milk intake, exercise and caffeine intake. 3. Health promotion behavior was positively correlation with age, body weight, height income, element school and current milk intake and exercise.

• Journal of muscle and joint health
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• v.21 no.3
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• pp.224-235
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• 2014

Purpose: The purpose of this study was to test the reliability and the validity of the Practice Environment Scale of Nursing Work Index (PES-NWI) scale when applied to Korean psychiatric nurses working in the psychiatric hospital in Korea. Methods: Data from 224 psychiatric nurses working in the 6 psychiatric hospitals in Korea were analyzed using Cronbach's ${\alpha}$, item total correlation, and exploratory factor analysis. Results: The Cronbach's ${\alpha}$ for the 27 items from the PES-NWI were .93, and the item total correlation coefficients ranged from .38 to .64. Six factors which explained 61.2 of variance in the perception of practice environment, emerged; nurse professional role and development, nurse manager ability, leadership, and support of nurses, staffing and resource adequacy, nursing foundation for quality of care, collegial nurse-physician relations, co-worker's ability and qualification. Five derived factors reconstructed, and two factors were renamed. Conclusion: Findings demonstrate that not all but 27 items from PES-NWI is a reliable and valid scale when applied to Korean psychiatric nurses working in Korea. Also findings indicate that Korean psychiatric nurses perceive practice environment differently than American nurses but have some point of similarities with Asian nurses working in the United States.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.11B
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• pp.1640-1650
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• 2010

To prepare for the network centric warfare, Korea Joint Tactical Data Link System(KJTDLS) has been developed by the South Korean military recently and its development is divided into two phases: basic and complete ones. Due to the limited bandwidth and low transmission efficiency of the developing KJTDLS (basic), lots of problems could be occurred when the TDMA protocol in Link-16 is applied. In this paper, a new dynamic TDMA frame structure for KJTDLS(basic) is proposed and the performance of the proposed is evaluated through the implementation of simulation.

• Korean Journal of Materials Research
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• v.26 no.7
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• pp.376-381
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• 2016

For the development of a low-melting point filler metal for brazing aluminum alloy, we analyzed change of melting point and wettability with addition of Sn into Al-20Cu-10Si filler metal. DSC results showed that the addition of 5 wt% Sn into the Al-20Cu-10Si filler metal caused its liquidus temperature to decrease by about 30 oC. In the wettability test, spread area of melted Al-Cu-Si-Sn alloy is increased through the addition of Sn from 1 to 5 wt%. For the measuring of the mechanical properties of the joint region, Al 3003 plate is brazed by Al-20Cu-10Si-5Sn filler metal and the mechanical property is measured by tensile test. The results showed that the tensile strength of the joint region is higher than the tensile strength of Al 3003. Thus, failure occurred in the Al 3003 plate.

• Journal of muscle and joint health
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• v.12 no.1
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• pp.16-27
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• 2005

Purpose: This study was to investigate the using pattern of alternative therapies in chronic arthritics. Method: We interviewed 192 Arthritis patients lived in the metropolitan area with structured questionnaire from August to september in 2004. Data were analyzed statistically by using SPSS program. Result: Results were summarized as follows; 1. 89.0% of subjects had utilized one or more types of alternative therapies 80.8% of these patients did not consult a nurse or doctor with using alternative therapies. 2. 87.7% of subjects obtained information of using the alternative therapy from similar patients, their families or relatives etc. The most frequently used types of alternative therapies are hand acupuncture(58.0%), bathing(29.6%), massage(25.4%) taping therapy(13.0%). 3. After using alternative therapies, over 80% of subjects answered that they were satisfied to effects of alternative therapies and only 9.4% of them responded that they experienced side effects from use of alternative therapies. Conclusion: results of the study showed that most of patients with arthritis have used alternative therapies, they were satisfied to effect of using alternative therapies. Therefore, many research for use of alternative therapy and the development of standardized protocol of nursing intervention appling alternative therapy need to be achieved.

• Journal of muscle and joint health
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• v.15 no.2
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• pp.155-165
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• 2008

Purpose: The purpose of this study was to develop a progressive exercise program based on clinical guidelines for exercise prescription for older adults with osteoarthritis, which was planned to improve the existing arthritis self-help program. Method: We analyzed the contents of the arthritis self-help program and closely reviewed the guideline of exercise prescription for elderly with osteoarthritis. Results: The major contents of the revised arthritis self-help program are as follows: 1) The weekly education is composed of one-hour exercise and one-hour health education about various subjects. 2) The weekly main exercise is composed of muscle strengthening and endurance exercise. 3) Endurance exercise consists of three steps. 4) Muscle strengthening exercise is performed by gravity at first, and then the Thera-Band muscle strengthening exercise is followed on the 4th week. Conclusion: It is necessary to verify the effect of the progressive exercise program for older adults with osteoarthritis. It is thought that this revised program could be adopted as a rehabilitation program for older adults with osteoarthritis.

• Journal of muscle and joint health
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• v.21 no.2
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• pp.135-144
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• 2014

Purpose: The purpose of this study was to analyze and clarify the concept of shift work maladaptation syndrome and to facilitate development of interventions for the shift work adaptation. Methods: This study used Walker and Avant's concept analysis process. Results: Shift work maladaptation syndrome can be defined as the following attributes: 1) destruction of the circadian rhythm, 2) existence of a threshold, 3) individual characteristics (year of career, type of personality, and type of coping) 4) somatization, and 5) negative emotional conditions. The antecedents of shift work maladaptation syndrome consist of counterclockwise shift work, irregular shift cycle, night work which is breaking circadian rhythm, and lifestyle changing. The consequences as a result of shift work maladaptation syndrome are deterioration of health (gastrointestinal, neuro-psychic, cardiovascular function), reduction of social relationships, and turnover or resign. Conclusion: The results of this study can be useful as the foundation of shift work adaptation implementation.

• The Korean Journal of Physiology and Pharmacology
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• v.14 no.4
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• pp.199-204
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• 2010

The potential therapeutic action of shikonin in an experimental model of rheumatoid arthritis (RA) was investigated. As a RA animal model, DBA/1J mice were immunized two times with type II collagen. After the second collagen immunization, mice were orally administered shikonin (2 mg/kg) once a day for 35 days, and the incidence, clinical score, bone mineral density (BMD), bone mineral content (BMC) and joint histopathology were evaluated. BMD in the proximal regions of the tibia largely increased in the shikonin treatment group compared with the control group. We also examined the effect of shikonin on inflammatory cytokines and cartilage protection. Shikonin treatment significantly reduced the incidence and severity of collagen-induced arthritis (CIA), markedly abrogating joint swelling and cartilage destruction. Shikonin also significantly inhibited the production of matrix metalloproteinase (MMP)-1 and up-regulated tissue inhibitors of metalloproteinase (TIMP)-1 in mice with CIA. In conclusion, shikonin exerted therapeutic effects through regulation of MMP/TIMP; these results suggest that shikonin is an outstanding candidate as a cartilage protective medicine for RA.