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JongMin Lim 대한스포츠물리치료학회 2022 정형스포츠물리치료학회지 Vol.18 No.1
Purpose: To date, many previous studies on core muscle training have demonstrated its effectiveness on motor performance. This study was aimed to investigate the effect of abdominal core training on balance ability and pulmonary function for smokers. Methods: Eight healthy males (age: 24.75±6.60), smoking for more than three years participated in this study. Balance ability and pulmonary function were measured before and after 4-week intervention period and compared. The intervention was conducted twice a week during a total of 4 weeks Results: There was only significant change in expiratory minute ventilation (VE, P<.001), while balance ability and other pulmonary tests (expiratory and inspiratory vital capacities, expiratory reserve volume, inspiratory minute ventilation and tidal volume) did not showed significant changes. Conclusion: Through the results of this study, it was confirmed that abdominal core training had a preferential effect on respiratory function over balance ability, and in particular, a preferential change was found in exhalation rather than inhalation. Therefore, it was concluded that abdominal core training would be useful in patients with pulmonary disease.
Rehabilitation Strategies in Lifestyle Intervention for Improving the Physical Function of the Knee
Jongmin Lim,Bumchul Yoon 대한스포츠물리치료학회 2018 정형스포츠물리치료학회지 Vol.14 No.2
Purpose: Lifestyle intervention (LSI) provides basic recommendations that improve the quality of life and health of patients with minor disabilities. The LSI intervention strategies are associated with active living, healthy weight, healthy eating, and emotional stability. These intervention strategies can change an unhealthy lifestyle to a healthy lifestyle and provide important health care information. Main issue: This study focused on a new LSI-based knee rehabilitation protocol and proved the effect of exercise prescription on the knee. The clinical significance of this study demonstrated that continuous rehabilitation, effective rehabilitation, and recurrence prevention can be achieved by prescribing the appropriate exercise for patients after discharge. Therefore, practical lifestyle medicine knowledge and information are provided by the home-based rehabilitation self-exercise program with the new LSI-based knee rehabilitation protocol. Conclusions: The LSI-based protocol can improve and maintain health conditions and knee function. With the aim of improving self-care abilities, this program is expected to make significant contributions recurrence prevention, reduced mortality, and improved quality of life, physical function, and fitness.
Immediate Effects of Static and Dynamic Stretching Techniques of the Ankle Joint on Balance Ability
JongMin Lim 대한스포츠물리치료학회 2022 정형스포츠물리치료학회지 Vol.18 No.1
Purpose: This study aimed to investigate the immediate effect of dynamic or static stretching applied to the ankle on the balance ability to effectively guide exercise within a limited time of treatment in clinical practice. Methods: Twenty healthy adults aged 23.32±2.23 were divided randomly into two groups. Control group performed static stretching three times for 30 seconds and the experimental group performed dynamic strethcing three times. Balance ability was measured before and after the intervention in each group and the results were anlayzed using paired and independent t-test. Results: As a result, there was no significant differences between static and dynamic stretching in both groups. However, there was a margianl signifcantly changes in balance ability within dynamic strethcing group. Conclusion: The results of this study indicated that future studies with longer intervention period and lager sample size will be needed to provide more accurate and objective evidences, considering that a margnial significant changes was found in the dynamic stretching group.
ECR plasma pretreatment for ZnO epitaxy
Jongmin Lim,Chongmu Lee 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.52
The eects of precleaning the substrate on the epitaxial growth of ZnO were investigated. Dry cleaning techniques employing argon, oxygen, and hydrogen ECR plasmas were employed, respectively, to remove organic contaminants and native oxides on sapphire and silicon substrates prior to the growth of the ZnO lm by atomic layer epitaxy. The incubation period for ZnO nucleation was measured by using scanning electron microscopy (SEM) and Auger electron emission spectroscopic analysis (AES) to investigate the incubation period for ZnO nucleation. ECR plasma pretreatment reduced the cleaning eciency. Oxygen ECR plasma pretreatment was more eective than any other plasma pretreatment because oxygen ECR plasma treatment increased the hydroxyl packing density at the substrate surface, and its eects on sapphire substrates were especially prominent.
Synthesis of nickel coated gadolinia doped ceria nanopowders by microwave radiation
Jongmin Lim,김상우 한양대학교 세라믹연구소 2008 Journal of Ceramic Processing Research Vol.9 No.5
Nickel coated gadolinium doped ceria (GDC) powders were synthesized by microwave radiation and combustion. For the synthesis, precipitates of gadolinium cerium oxycarbonate hydrate (GdxCe2−xO(CO3)2·H2O) were formed by a microwave-radiated reaction between cerium nitrate (Ce(NO3)3·6H2O), gadolinium nitrate (Gd(NO3)3 ·6H2O) and urea (CO(NH2)2), then nickel coatings on the gadolinium cerium oxycarbonate hydrate were performed by a further microwave reaction between nickel chloride and urea. The shape and size of the gadolinium cerium oxycarbonate hydrate particles were critically dependent on aging time during the microwave radiation. Irregular particles were transformed to rod-shape particles which were well-crystallized by increasing the aging time to 40 minutes at 70-80 oC because of the gradual decomposition of urea during the microwave radiation. Small nickel precursor particles were homogeneously coated on the gadolinium cerium oxycarbonate hydrate particles with a rod shape with aid of microwave radiation at 80 oC for 40 minutes. As a result, nickel coated GDC nanopowders were successfully produced by the microwave radiation synthesis and further microwave combustion at 450 oC for 20 minutes.
Lim, Jongmin,Yang, Yun Young,Lee, Ju-chan Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.6
For industrial package (IP)-type transport containers for radioactive materials, a free drop test should be conducted under regulatory conditions. Owing to various uncertainties observed during the drop test, errors in drop angles inevitably occur. In IP-type metal transport containers in which the container directly impacts onto a rigid target without any shock absorbing materials, the error in the drop angle due to a slight misalignment makes a significant difference from the ideal drop. In particular, in a vertical drop, the error in the drop angle causes a strong secondary impact. In this paper, a numerical method is proposed to estimate the error in the drop angle occurring during the test. To determine this error, an optimization method accompanying a computational drop analysis is proposed, and a surrogate model is introduced to ensure calculation efficiency. Effectiveness of the proposed method is validated by performing the verification and comparison between the test and the analysis applied with the drop angle error.
JongMin Lim 대한스포츠물리치료학회 2020 정형스포츠물리치료학회지 Vol.16 No.1
Purpose: The purpose of this study is to investigate the effect of transcranial direct current stimulation (tDCS) over the dorsolateral prefrontal cortex (dlPFC) on pain intensity and functional strength in the elderly with chronic back pain. Methods: Sixteen elderly (72 ± 5.16 yrs) with chronic back pain participated in this randomized double-blinded crossover study. Each participant received both sham and 2-mA anodal currents over left dlPFC (cathode over the seventh cervical spinous process) for 20 min during 2 weeks for each current type with a washout period of 2 days between two different current stimulation periods. Pain intensity, functional lift strength, and the fear-avoidance response of all the participants were evaluated. Results: There were no significant differences in all pain-related variables between the 2mA stimulation period and the sham stimulation period. However, for results by within-group analysis in each stimulation period, we found significant improvements in pain intensity (p=.02), functional strength, (p=.006) and fear-avoidance response (p=.002) only after 2mA stimulation period, while there were no significant changes after sham stimulation. Conclusion: The current study demonstrated that anodal tDCS over dlPFC improve the painful feelings, followed by the functional strength for lifting task.