• Clean Technology
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• v.9 no.1
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• pp.9-21
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• 2003

CFC-113 and 1,1,1-TCE which are ozone destruction substances are not used any more in the advanced countries because of Montreal protocol. MC and TCE are now used restrictively at small part of industrial fields in most of countries since they are known to be hazardous or carcinogenic materials. Thus, it is indispensible that the alternative cleaning agents which are environmental-friendly and safe, and show good cleaning ability should be developed or utilized for replacement of the halogenated cleaning agents. Aqueous cleaning agents are evaluated to be promising alternative ones among various alternatives in environmental and economical view point. This study has been carried out as a part of development program of aqueous cleaning agent. First of all, several types of surfactants which are the most important component in aqueous cleaning agents were chosen, and the physical properties, foaming ability, cleaning ability and oil-water separation efficiency of their aqueous solutions were measured and compared for selection of proper type of surfactant in aqueous cleaning agents.

• Journal of The Korean Society of Integrative Medicine
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• v.8 no.1
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• pp.203-217
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• 2020

Purpose : This study aimed to determine whether task-oriented trunk training can improve muscle strength, muscle activity, balance, and gait in stroke patients. Methods : A total of 27 stroke patients who agreed to participate in the study were randomly divided into the following two groups: (1) experimental group 1, task-oriented training applied to the proximal part (n=14) and (2) experimental group 2, task-oriented training applied to the distal part (n=13). Thereafter, task-oriented trunk training was accordingly applied in each group for 60 minutes per session, 5 times per week for 6 weeks. Muscle power, muscle activity, balance, and gait were assessed using a digital dynamometer, surface electromyograph, Timed Up and Go (TUG) test, and gait analyzer (G-WALK), respectively, before and after training. Results : Trunk muscle strength significantly increased in both groups after training (p<.05). and there was a significant difference between the groups. Muscle activity in the stance phase during gait significantly increased in both groups after training (p<.05), and there was a significant difference between the groups. Muscle activity in the swing phase during gait significantly increased in both groups after training (p<.05), and there was a significant difference between the groups. The TUG test values significantly increased in both groups after training (p<.05), and there was a significant difference between the groups. Gait significantly increased in both groups after training (p<.05), and there was a significant difference between the groups. Conclusion : The results of this study show that task-oriented training can improve trunk muscle strength, muscle activity, balance, and gait in stroke patients.

• Journal of Sensor Science and Technology
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• v.12 no.6
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• pp.258-264
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• 2003

The present paper studies how to calibrate hydrometer using image process. The method aligns particular scales of hydrometer selected for calibrating the hydrometer with the horizontal plane of the reference liquid automatically without man's operation. Major parts composing the system are CCD camera, frame grabber, stepping motor and image process program. The image process program is composed of a part that locates the meniscus and aligns it with a scale and a part that controls the step motor. To verify the performance of the developed method, this study compares the meniscus and scale observed directly with the naked eye with the result of calibration by the manual calibration method. The differences between the corrections were less than $0.004\;kg/m^3$ with uncertainty of $0.06\;kg/m^3$. These showed that the calibration results of the developed hydrometer calibration using image process nearly equal to manual method.

• Fashion & Textile Research Journal
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• v.16 no.2
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• pp.196-207
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• 2014

This study considers expression types and aesthetic characteristics by analyzing Animal sculptures by Billie Achilleos in art collaboration with Louis Vuitton. The conclusions of this study are as follows. First, As for expressin type shown in the art collaboration, it is reflected the historical and cultural value peculiar to a country symbolized through animals. As the aesthetic characteristics of symbolism, it reflects historical identity of country by using an image of a symbolic animal representing a state. Second, as the type shown in physical characteristics of animals by utilizing items in Louis Vuitton directly, it is organically expressed a literal type by directly integrating a form having been designed as a commodity itself into the characteristically physical part of an animal. As the aesthetic characteristics according to this is naturality, the motive of the work having borrowed shapes of diverse animals or insects can be said to have been naturally reflected in the primitive natural beauty. Third, through the deconstruction and recombination of a Louis Vuitton item. the amusement of the aesthetic characteristics was expressed in a type having the structurally embodied dynamic movement of an animal, and is expressing visual fun. Fourth, it uses expression type emphasized a specific part of an animal by decorating accessories in Louis Vuitton partly. The aesthetic characteristics is Ornament, the value of craft decoration is being shown by using colorful visual effects by using materials with the colorful textures and patterns of fabrics or mixing embroidery or beads, and belt decoration.

• Journal of the Korea Fashion and Costume Design Association
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• v.12 no.4
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• pp.75-88
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• 2010

The objective of this study is to investigate the fit preference tendency for ready-to-wears(jackets, skirts and slacks) of adult women and to find out the respective differences by the age range and the obesity level. The study method was the questionnaire survey with the subjects of 295 women of 20 up to 59 years of age. The questionnaire is composed of fit preference tendency, physical measurements, age, and occupation. For the data analysis, SPSS 18.0 program was used, and descriptive statistics, Crosstabs, ANOVA, Duncan's test, t-test and multiple regression were conducted. The findings were as follows. 1. Regarding the fit preferred for each part of jackets, skirts, and slacks, among ready-to-wears, the 'thing with some extra width' in every part was most favored, followed by the 'thing fitting perfectly.' 2. The differences were found in the fit preference tendency by the age of adult women. The fit preference tendency was higher among those in their 20's than among those of the other age range. 3. The differences were also found in the fit preference tendency by the obesity level of adult women. The fit preference tendency was high in the order of the emaciation, normalcy, and obesity types. 4. For all of three items, age and body type or body type influenced the preference by the fit level. As the age was higher and the body type was fatter, those items with some flexibility were preferred.

• Journal of Korean society of Dental Hygiene
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• v.8 no.4
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• pp.101-113
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• 2008

The purpose of this study was to examine the health segment of the 7th national physical education curriculum in an effort to grasp the state of oral health education in the school curriculum. And it's also meant to investigate the relationship between oral health education and the oral health awareness of some high schoolers to check into any possible problems with oral health education as part of health education. The subjects in this study were 240 students from two different girls' high schools in Seoul, on whom a survey was conducted to find out their oral health knowledge, behavior and awareness. And the health category of the current P.E. curriculum announced by the Ministry of Education was analyzed. The findings of the study were as follows: Oral health education provided by the high schools as part of health education in P.E. class wasn't linked to P.E. theories and practice. The weight of oral health education was extremely small in the health segment, and there was no sequence, continuity and integration among the content systems of oral health education for different grades. When some high schoolers were investigated, they weren't properly oral health conscious, though it was very important for students to receive oral health education to prevent and manage dental diseases. And they didn't consequently take care of their own oral health. Future research efforts should be channeled from diverse angles into developing oral health education curriculums to bolster school oral health education to improve national oral health.

• Journal of the Korea Furniture Society
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• v.11 no.2
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• pp.45-53
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• 2000

This study was carried out to determine the suitability of 3 months old bamboo species of Phyllostachys bambusoides S. et Z., Phyllostachys Pubescens Mazel and Phyllostachys nigra var henonis Stapf as raw materials for the manufacture of strandboard. Total of 108 strandboards were made using urea-formaldehyde resin content level of 12% and one percent of liquid wax emulsion. The strandboard consisted of three layers the top and the bottom layer of which were oriented to the same direction and weighted 25% of the strandboard each. The middle core layer weighed 50% of the board and was perpendicular to the outer top and bottom layers. Analysis was performed to determine the effect of strand lengths and Uowing years of 3 months, 2 years and 3 years on strandboard properties. The physical and mechanical properties of bamboo species and boards were measured and compared to the standard requirements of strandboards. The results are as follows; 1. The more the growing years the higher the density of bamboo. Top part of bamboo indicated higher density value than that of bottom part. 2. Bamboo showed higher static bending strength compared to the main wood species. Longer growing years of bamboo generally inclosed the static tending strength out there were no statistical significancies for Phyllostachys bmbusoides S. et Z. and Phyllostachys pubescens Mazel. 3. Strand length indicated no difference on density and moisture content of strandboard. 5 cm of strand length gave the best static bending strength and internal bonding strength. Bamboo strandboard exhibited lesser extents of thickness swelling than that of CSA standard. 4. 3 months old bamboo gave higher static bending strength of strandboard than those of 2 years and 3 years old bamboo. In case of Phyllostachys nigra var henonis Stapf, 3 months old bamboo indicated higher internal bonding strength than those of 2 years and 3years old bamboo. but in Phyllostachys bambusoides S. et Z., Phyllostachys pubescens Mazel, there were no difference among growing years. Growing years showed no different physical properties of bamboo strandboard.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.2
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• pp.687-708
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• 2017

The machine-to-machine (M2M) communication is featured by tremendous number of devices, small data transmission, and large uplink to downlink traffic ratio. The massive access requests generated by M2M devices would result in the current medium access control (MAC) protocol in LTE/LTE-A networks suffering from physical random access channel (PRACH) overload, high signaling overhead, and resource underutilization. As such, fairness should be carefully considered when M2M traffic coexists with human-to-human (H2H) traffic. To tackle these problems, we propose an adaptive Slotted ALOHA (S-ALOHA) and time division multiple access (TDMA) hybrid protocol. In particular, the proposed hybrid protocol divides the reserved uplink resource blocks (RBs) in a transmission cycle into the S-ALOHA part for M2M traffic with small-size packets and the TDMA part for H2H traffic with large-size packets. Adaptive resource allocation and access class barring (ACB) are exploited and optimized to maximize the channel utility with fairness constraint. Moreover, an upper performance bound for the proposed hybrid protocol is provided by performing the system equilibrium analysis. Simulation results demonstrate that, compared with pure S-ALOHA and pure TDMA protocol under a target fairness constraint of 0.9, our proposed hybrid protocol can improve the capacity by at least 9.44% when ${\lambda}_1:{\lambda}_2=1:1$and by at least 20.53% when ${\lambda}_1:{\lambda}_2=10:1$, where ${\lambda}_1,{\lambda}_2$ are traffic arrival rates of M2M and H2H traffic, respectively.

• Journal of The Korean Society of Integrative Medicine
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• v.4 no.2
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• pp.29-36
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• 2016

Purpose : The purpose of this study was to find out the effects on muscle activations of serratus anterior and upper trapezius muscles when push-up plus exercise togu applied differently depending on the body part. Method : Thirty six volunteers took part in this study and we divided into three groups(upper arm togu group 12, leg togu group 12, upper arm-leg togu group 12). Each experimental group performed push-up plus exercise. All volunteers received a total of 18 exercise session over a 6 week period (three times per week). Exercise program was composed of serratus anterior and upper trapezius push-up plus exercise. Then we measured muscle activation of scapular stabilizer by electromyography. Repeated ANOVA was used to examine the effects of the intervention on each outcome measure. Result : After the six week intervention, there was a significant difference between the pre and 6 week in serratus anterior and upper trapezius muscle activity(p<0.05). After the six week intervention, there was a significant difference among the three group in serratus anterior muscle activity but no significant difference in upper trapezius muscle activity(p>.05). Conclusion : Serratus anterior and upper trapezius showed high muscle activity during push-up plus exercise. Therefore have a positive impact of scapular stabilizer. The larger the area of the unstable support surface, the larger muscle activity was larger of variation quantity.

• Journal of Korea Water Resources Association
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• v.48 no.2
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• pp.137-147
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• 2015

This study performed the systematic classification of the various types of riffles and analyzed their physical and hydraulic characteristics at the Hongcheon River and Seomjin River. The riffles are classified into the long type and the wide type by their ratio of length and width, and also classified into the convergent type and the divergent type by their width change along flow direction. They are also classified into the falling type, the running type, the undular wave and the undular jump by their surface profiles. The falling type and the running type usually occur near the cobbles with multiple diameters, whereas the undular wave and the undular jump occur near the small pebbles. They showed the upward convex type at the middle part, and the slope gets bigger at the downstream part.