• Journal of the Korean Chemical Society
• /
• v.46 no.6
• /
• pp.561-568
• /
• 2002

This study examined secondary school science teachers' thinking on physical and chemical change. For this research, we analysed the answers of 80 secondary school science teachers. According to the result of the analysis,teachers had various opinions when they classified phenomena of dissolving ionic compound or diluting acid into phys-ical change and chemical change. Many teachers tended to classify similar phenomena into different change when those were represented with different focus. It means that teachers' opinions were not consistent.

• Proceedings of the Korean Society of Agricultural Engineers Conference
• /
• 1998.10a
• /
• pp.521-526
• /
• 1998

This study was initiated to build runoff plots, install soil and water quality monitoring systems and collect background data from the plots and soils to assess runoff the nonpoint source pollution and soil physical change in mountainous soils. Eleven 3 $\times$ 15 m runoff plots and monitoring systems were installed at a field of National Alpine Agricultural Experiment Station to monitor soil physical change, and discharge of nonpoint source pollutant. Corn and potato were cultivated under different fertilizer, tillage and residue cover treatments. The soil has a single-layered cluster structure that has a relatively good hydrologic properties and can adsorb a large amount of nutrient. 11 runoff plots were treated and monitored with respect to physical property of the soil, runoff and sediment discharge.

• The Journal of Korean Physical Therapy
• /
• v.13 no.3
• /
• pp.579-584
• /
• 2001

The purpose of this study was to determine the effects of kinesio taping on lumbar muscle strength and flexibility. The samples for this study were 61 normal subjects(35 experimental group, 26 control group), aged 19 to 29 years. The data were analyzed by paired t-test. pearson and bivariate correlations. The results of this study were as follows : 1. The lumbar muscle strength was significant change in the experimental group(p<0.05). 2. The lumbar muscle strength was no significant change in the control group(p>0.05). 3. The flexibility was significant change in the experimental group and control group(p<0.05). 4. The lumbar muscle strength and flexibility were high associated in between session reliability(p<0.05).

• Journal of Korean Physical Therapy Science
• /
• v.16 no.3
• /
• pp.1-9
• /
• 2009

Background: The purpose of this study is to have examined the influence on the blood circulation by comparing the differences between stimulating the sympathetic ganglion and the muscle group among the stimulation variables in interferential current stimulation. Method: The object of the study is the twenties(M=8, F=12), who are in great condition and have no pathological report for the blood circulation influence. The intensity of the inferential current stimulation is the medium degree, 100 bps constant current, which is the comfort and degree to confirm the muscle contraction. The areas stimulated are the stellate ganglion area in the seventh cervical vertebrae and the forearm muscle area. Results: We have made sure that there is no change in blood pressure and pulse and that the change in the skin temperature occurred highly. Conclusion: In considering the change of the blood circulation in case of stimulation area by the inferential current stimulation, we have seen that stimulating the sympathetic ganglion area is more effective than stimulating muscle area directly.

• Journal of the Korean Home Economics Association
• /
• v.17 no.4
• /
• pp.15-22
• /
• 1979

This paper was studied changes of physical properties of Lining fabrics by washing and difference between dry method. I experimented four kinds of Lining fabrics for the sample . The analysis was performed by correlation coefficient analysis and significance tested between correlation coefficients. The results are summarized as follows : 1) Increasing rate of shrinkage tends to call high density and weight. 2) Rayon fabrics is shown the most high rate of shrinkage and decreasing strength by increasing washing times. 3) Drip dry makes little change of physical properties. 4) Polyester fabrics is little by washing times and dry method.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1991.10a
• /
• pp.1-4
• /
• 1991

Relationship between againg and characteristic change of asphalt is not well known through asphalt rheolopy. Therefore, this study was conducted to evaluate characteristic change of asphalt cement due to againg based on experimental results of chromatogram and selected physical properties. Currently, three virgin asphalt cements were tested for physical properties and chromatograms before and after artificially conditioning for againg. Results in the current study showed that againg caused significant changes of physical properties and increase of larger size molecules and approximately corresponding reduction of smaller size molecule in asphalt cement molecular size distribution.

• Journal of the Korean Society of Physical Medicine
• /
• v.5 no.1
• /
• pp.71-79
• /
• 2010

Purpose : To investigate of gait change as Q-angle in chronic knee osteoarthritis patients. Methods : Participated osteoarthritis disease patients(n=16) and normal adults(n=16). gait measure was used by GaitRite and Q-angle measure was used by tape measur

• Advances in nano research
• /
• v.13 no.6
• /
• pp.561-574
• /
• 2022

The stability of protein tissues and protein fibers in the human muscle is investigated in the presented paper. The protein fibers are modeled via tube structures embedded in others proteins fibers like the elastic substrate. Physical sport and physical exercise play an important role in the stability of synthesis and strength of the protein tissues. In physical exercise, the temperature of the body increases, and this temperature change impacts the stability of the protein tissues, which is the aim of the current study. The mathematical simulation of the protein tissues is done based on the mechanical sciences, and the protein fibers are modeled via wire structures according to the high-order theory beams. The thermal stress due to the conditions of the sport is applied to the nanoscale protein fibers, then the stability regarding the frequency analysis is investigated. Finally, the impact of temperature change, physical exercise, and small-scale parameters on the stability of the protein tissues are examined in detail.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.34 no.4
• /
• pp.1203-1213
• /
• 2014

The hydraulic characteristics and the patterns of riverbed change had been analysed by HEC-RAS simulation in a reach of Cheong-mi river with and without weir. The corresponding physical disturbance had been evaluated with the method suggested by K-water (2008). The occurrences of low physical disturbance score coincide with the corresponding high bed changes by weir installation. The effects of physical disturbance coincide with the patterns of riverbed change along river reach which shows riverbed change is the important factor to physical disturbance. In case of installation of additional weirs at up and down stream sections of no disturbance effect by the existing weir, no physical disturbances occur in certain sections with confirming the appearance of the similar disturbance scores between the simulation results of with and without additional weir installations. In case of installation of additional weirs at up and down stream sections of disturbance effect margins by the existing weir, physical disturbances occur at every section. In case of installation of additional weirs at up and down stream sections within disturbance effect by the existing weir, low physical disturbance scores are given at every section because of superposition of disturbance along river reach. The physical disturbance would be minimized such that the additional weir is installed with sufficient distances of no disturbance and bed change effects along river reach.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.35 no.5
• /
• pp.46-52
• /
• 2003

In this work we developed the closed-loop model of a paper machine during grade change with the intention to provide a reliable dynamic model to be used in the model-based grade change control scheme. During the grade change, chemical and physical characteristics of paper process change with time. It is very difficult to represent these characteristics on-line by using physical process models. In this work, the wet circulation part and the drying section were considered as a single process and closed-loop identification technique was used to develop the grade change model. Comparison of the results of numerical simulations with mill operation data demonstrates the effectiveness of the model identified.