• Korean Chemical Engineering Research
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• v.46 no.6
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• pp.1142-1147
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• 2008

Nano-structured porous carbon fiber(PCF) for the catalyst supports of the direct methanol fuel cell (DMFC) were prepared from the mesophase pitch by using the nano-MgO powders. Specific surface area of the PCFs was $8{\sim}58m^2/g$ and surface pore structures had almost meso pore diameter of 10~20 nm which were depending on the amount of MgO spheres. Aqueous reduction method was used to load 60 wt% PtRu on the prepared PCF supports. The electro-oxidation activity and single cell performance of the 60 wt% Pt-Ru catalysts were measured by cyclic voltammetry and unit cell test. The performances of these catalysts increased by 5~10% compared with one of commercial catalyst.

• Advances in Traditional Medicine
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• v.5 no.3
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• pp.231-235
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• 2005

A limited number of studies have been conducted on the bioactivity of Callophyllis japonica (C. japonica), which is a red seaweed that is traditional in the oriental diet. In this report, the hepatoprotective effect of C. japonica was studied in a carbon tetrachloride $(CCl_4)-induced$ hepatotoxicity model in rats. A single intraperitoneal injection of 1.25 ml/kg of 20% $CCl_4$ in olive oil produced an elevated level of serum glutamic pyruvic transaminase (SGPT) and increased enzyme activity of serum glutamic oxaloacetic transaminase (SGOT). Pre-treatment with C. japonica (150 mg/kg/d) for 3 days in $CCl_4-injected$ rats reduced the levels of SGPT and SGOT compared with control levels (P < 0.05), while higher doses (300 and 600 mg/kg) were ineffective. The administration of C. japonica (150 mg/kg/d) for 3 days after the $CCl_4$ injection in rats was ineffective at reducing SGPT and SGOT. The histopathological findings in each group largely agreed with the biochemical data. The results of this study support the suggestion that C. japonica has a hepatoprotective effect on chemical-induced liver injury.

• Physical Therapy Korea
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• v.24 no.1
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• pp.19-29
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• 2017

Background: Patients after rotator cuff (RC) surgery experienced pain, weakness and limited of motion of the shoulder. Physical therapists have used heat therapy, electrotherapy, range of motion (ROM) exercise and other methods to treat patients after RC surgery. In addition, functional taping is also used to support joint movement and to increase shoulder joint stability. Objects: The purpose of this study was to determine the initial effects of functional taping using non-elastic tape on pain, strength and ROM of the shoulder following RC surgery. Methods: Forty-eight patients with who underwent RC surgery volunteered for this study. The subjects were randomly divided into an experimental group (EG, $n_1=25$) and a control group (CG, $n_2=23$). First, non-allergic tape was applied to the shoulder to prevent skin irritation. The EG applied functional taping using non-elastic tape and the CG applied sham taping using elastic tape. Assessment tools included the shoulder pain and disability index for functional activity score, visual analog scale for level of pain, shoulder muscle strength, hand grip strength and ROM testing. Results: Pain score in the both group significantly decreased (p<.05), and change in pain score of in the EG increased significantly than in the CG (p<.05). Shoulder strength and ROM in the both group significantly increased (p<.05). Especially external rotation and extension of the shoulder ROM in the EG increased significantly more than in the CG (p<.05), but the rate of change in the two groups showed no significant difference. Conclusion: These results suggest that functional taping using non-elastic tape was initially effective in decreasing pain score level in patients with RC surgery.

• Journal of Korean Elementary Science Education
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• v.20 no.1
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• pp.59-73
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• 2001

The National Science Fairs has been held in every year for the promotion of science and technology and scientific civil life. The purpose of this study is to survey the current problems in National Science Fairs by making up a question and to improve them. The study makes up a questionnaires about the existing Science Fairs to the teachers who have submitted their works to the Science Fairs and suggest the ways of improvement. The result of questionnaires is that little availability of reference materials, difficulty of paying proper attention to regular classes because of frequent travels, and absence of experimental devices and experimental rooms are perceived as major obstacles in preparing for the exhibition. Respondents teacher also pointed out some problems with the current organization of the exhibition; non-voluntary selection process for the potential authors, separation of research content from regular teaching materials, unrealistically high standard, low participation rate of teachers, so many exhibited works, lack of professionalism in the screening process. The majority however, agreed that the exhibition event should be continuously done, after remedial measures have been taken about the problems. First, the side of science education is emphasized in a purpose of the science fairs to let activity related to science fair be closely connected with school education. Second, students have to be divided according to grade. Third, research level have to be set not too higher than regular instruction content. Fourth, hand book related to science fairs have to be manufactured and spread. Fifth, data of local science fair have to be arranged. Sixth, judging section have to be subdivided and people related to science education have to be included to a judge. Seventh, excellent works have to be support to participate in ISEF.

• Safety and Health at Work
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• v.11 no.2
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• pp.207-214
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• 2020

Background: Prolonged sitting at work can lead to adverse health outcomes. The health risk of office workers is an increasing concern for the society and industry, with prolonged sitting work becoming more prevalent. Objective: This study aimed to explore the variation in muscle activities during prolonged sitting work and found out when and how to take a break to mitigate the risk of muscle symptoms. Methods: A preliminary survey was conducted to find out the prevalence of muscle discomfort in sedentary work. Firstly, a 2-h sedentary computer work was designed based on the preliminary study to investigate the variation in muscle activities. Twenty-four participants took part in the electromyography (EMG) measurement study. The EMG variations in the trapezius muscle and latissimus dorsi were investigated. Then the intervention time was determined based on the EMG measurement study. Secondly, 48 participants were divided into six groups to compare the effectiveness of every break type (passive break, active break of changing their posture, and stand and stretch their body with 5 or 10 mins). Finally, data consisting of EMG amplitudes and spectra and subjective assessment of discomfort were analyzed. Results: In the EMG experiment, results from the joint analysis of the spectral and amplitude method showed muscle fatigue after about 40 mins of sedentary work. In the intervention experiment, the results showed that standing and stretching for 5 mins was the most effective break type, and this type of break could keep the muscles' state at a recovery level for about 30-45 mins. Conclusions: This study offers the possibility of being applied to office workers and provides preliminary data support and theoretical exploration for a follow-up early muscle fatigue detection system.

• Korea journal of population studies
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• v.34 no.2
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• pp.163-190
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• 2011

This study assessed the manner in which social activities, religious experiences, and spiritual practices related to depression and life satisfaction among 217 Korean elderly individuals, aged 65 to 80. The Social Activities Scale and Brief Multidimensional Measure of Religiosity/Spirituality were employed to assess social activities and six domains of religiosity/spirituality: daily spiritual experiences, values, forgiveness, private religious practice, religious/spiritual coping, and religious support. In addition, depression was assessed with the Geriatric Depression Scale, and life satisfaction with the Satisfaction with Life Scale. After controlling for demographic variables, lower depression scores were predicted by higher levels of religious and spiritual coping, social activities, higher income, and ower daily spiritual experiences. In addition, identifying as female, advanced old age, and lower social activities predicted lower life satisfaction in this study. The implications of this study's findings on social work practice are also discussed, along with some future research directions.

• Journal of Convergence Society for SMB
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• v.4 no.2
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• pp.19-24
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• 2014

Recently the government aims to new markets, new jobs, and economic management based on technology, imagination, and creativity through the 'Creative Economy'. It has also been demonstrated in the creation of economic benchmarking of the developed countries that the performance of the creative economy in the border area with convergence of industry, science, culture and technology can achieve. In particular, women in science and technology play an important role in the case of developed countries. However, it is known that active supports and development policies for women scientists and engineers are insufficient, and the number of woman in science and technology is very low in korea. The ratio of women in her early and mid 30s in economic activity is low because of career break and difficulties from going back to work due to childbirth and parenting. The government should concentrate on the creative education and training, support for women in science and technology to develop the creative economy progressively. we present the investigation of the ICT industry status, role of women in economic participation, and the plan of creating jobs for women in the ICT industry in this paper.

• Journal of Fisheries and Marine Sciences Education
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• v.22 no.4
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• pp.490-500
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• 2010

This study, at first we extracted natural dyes from seaweed(Sargassum thunbergii, Hizikia fusiforme, Sargassum horneri). Then. we dyed cotton, wool, and silk with the extracted dyes. This study purposes to find the best one for dyeing with seaweed in order to develop a more efficient method of dyeing with seaweed and investigates the colorfastness to washing, light, sun protection factor, antibiotic activities, deodorization after mordanting treatment. of seaweed. The mission of general agricultural education is to prepare and support individuals for careers, build awareness, and develop leadership for the food, fiber, and natural resource systems. In response to the changes of the recognition and attitude toward agriculture, agricultural education also should be developed and adapted to the circumstances. And The Researcher took an observation on color change, color fastness to washing and color fastness to light after mordanting treatment. And the following results have been obtained. 1) Dyed cotton, wool, and silk fabrics with the extract of seaweed are generally brown. 2) Wool. silk, and cotton, in this order, are of good dyeability; Wool fabrics have the highest dyeability and cotton fabrics have the lowest. 3) Colorfastness to washing, light, sun protection factor, antimicrobial activity acessment, deodorization are all high. 4) The seaweed-dyed fabrics were shown to have much higher sun protection factor than the non-dyed fabrics, and the seaweed-dyed fabrics with mortanting treatment showed the following result; ranged from anged from from 93.1% to grade 99.2%. 5) The seaweed-dyed fabrics were shown to have much higher antibiosis than the non-dyed fabrics, and the seaweed-dyed fabrics with mortanting treatment showed the following result; ranged from 91.3% to grade 99.9%. 6) The seaweed-dyed fabrics were shown to have much higher deodorization than the non-dyed fabrics, and the seaweed-dyed fabrics with mortanting treatment showed 99.9%.

• Journal of Digital Convergence
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• v.13 no.2
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• pp.315-324
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• 2015

We investigated the student's satisfaction in team activities. The 64 engineering college freshmen were grouped into 13 teams, and a set of questionnaire was given and analyzed. The results showed that the overall team satisfaction positively affects the team performance. However, the team satisfaction is more correlated with the team member's participation and the relationship. The team satisfaction tends to increase when having an environment where the team members regard each other, which they felt more important than the outcome. The particular role of team members was not directly related to the team satisfaction, and the students prefer having self-control in team formation. By using the study results, we may support students to have a positive experience of team learning especially in convergence educational environment.

• The Journal of Korean Physical Therapy
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• v.16 no.4
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• pp.38-58
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• 2004

The regain of independent ambulatory ability is a important goal in the rehabilitation program of hemiplegic patient. Not only the function of lower extremity muscles, but also trunk muscles which stabilize extremities and pelvis, are important factors in normal gait. Therefor, it is necessary to develop an effective program which can improve muscle strength and symmetric activity of trunk muscles. The purpose of this study was to evaluate the influence of trunk muscle strengthening by forceful respiratory exercise on the gait asymmetry ratio in hemiplegic patient. 45 Hemiplegic patients due to stroke was randomized in 3 groups, forceful expiratory training(FET), forceful inspiratory training(FIT) and control group. In the experimental groups, ordinary physical therapy with forceful expiratory training and forceful inspiratory training for 20 minutes duration 3 times per week for 6 weeks were respectively performed. In the control group, only ordinary physical therapy was done. Before and after experiments, temporal-spatial gait parameters was measured in all patients. The data of 28 patients who carried out the whole experimental course were statistically analysed. The results of these experiment are as follows : 1. In comparison of difference of single support time asymmetry ratio among 3 groups, the FET group was significantly decreased than the control group (p<.05). 2. In comparison of difference of step length asymmetry ratio among 3 groups, the FIT group was significantly decreased than the control group (p<.05). Based on these results, it is concluded that the forced respiratory exercise program for 6 weeks can be improve the gait asymmetry ratio in hemiplegic patients. Therefore, the forced respiratory exercise is useful to improve the walking ability in hemiplegic patients. Since this study dealt only with the patients who could walk more than 3 meters in distance on floor independently, the further study for evaluating the influence of the forceful respiratory exercise on patients with acute stage stroke and also the development in various methods of use are expected.