• Journal of Digital Convergence
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• v.18 no.1
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• pp.241-247
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• 2020

The effect of radiofrequency radiation (RF) exposure on mouse associated with the exercise was investigated in the brain at the molecular level. The expression of tyrosine hydroxylase(TH), FoxO3a, AMPKα and mRNA was investigated by real-time RT-PCR in striatum and the hypothalamus. In the striatum, TH mRNA expression was decreased in the exercise and RF exposure group. FoxO3a mRNA expression was significantly increased in the spontaneous exercise group and a significant decrease was observed in the RF exposure and spontaneous exercise group. In the hypothalamus, TH mRNA expression was significantly decreased in the RF exposure and spontaneous exercise group. But, FoxO3a mRNA expression was significantly increased in the RF exposure and spontaneous exercise group. We will further investigate the expression of protein molecules in the hippocampus of the brain to reveal the effects of RF radiation on memory.

• 한국체육학회지인문사회과학편
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• v.55 no.6
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• pp.691-700
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• 2016

The purpose of this study was to investigate the effects of long-term endurance exercise or resistance exercise training on muscle anabolic/catabolic pathway. 50wks-old male Wistar rats(n=30) were randomly assigned for 3 groups (sedentary, endurance exercise, resistance exercise group). After 12-week of training, plantaris muscles were dissect to measure protein level. Akt/mTOR signal-related proteins were significantly increased only after resistance exercise training, but catabolic signal-related proteins, FoxO1 and MuRF1, were significantly decreased after resistance and endurance exercise training. After endurance exercise training, AMPK and PGC-1α protein levels were significantly increased. Therefore, the endurance exercise training has been shown to affect the protein balance of aging muscle through inhibition of muscle protein catabolism. The present results suggest the possibility that not only resistance exercise but also endurance exercise will be affectable to keep or increase muscle volume and capacity of middle-aged people.

• Journal of Advanced Marine Engineering and Technology
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• v.37 no.8
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• pp.953-961
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• 2013

In this study, the analyzed turbine is a 5MW upwind-type wind turbine. This conceptual model was made to compare the results of the numerical analysis program in the IEA Annex23 Subtask2 OC3 project. The numerical analysis program used in this study is FAST developed by NREL and AQWA of ANSYS. Motion characteristics, such as RAO, average motion, significant motion and average amplitude of 1/10 highest motion were obtained through the numerical analysis. The results of the numerical analysis were compared with the results of other numerical analyses and the experimental results, and all the results agreed with one another. The results will help resolve the fundamental design trade-offs between basic floating system concepts.

• Clinical and Experimental Pediatrics
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• v.48 no.1
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• pp.21-26
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• 2005

Purpose : The aim of this study is to find the prevalence of obesity, the serum lipid levels and the age at menarche in adolescent female athletes and to examine the effects of exercise in adolescent stage. Methods : With a questionnaire regarding their age at menarche, physical measurement, body fat, and blood samples of the serum lipid levels to evaluate the hyperlipidemia were obtained from adolescent female athletes(n=107) and general adolescent students(n=650) who didn't exercise at regular intervals, aged 12 to 18 years. Results : The mean weight in the athletes' group was $53.3{\pm}7.3kg$ which was similar with $54.3{\pm}8.0kg$ in the control group. The mean height in the athletes' group was $161.4{\pm}5.4cm$, which was taller than $158.9{\pm}5.3cm$ in the control group. The prevalence of obesity by obesity index, body fat, and BMI in the athletes' group were significantly lower than in control group. There was no significant difference in age at menarche between two groups($12.6{\pm}1.3$, $12.9{\pm}1.2$). The levels of cholesterol, LDL cholesterol, and HDL cholesterol in the athletes' group were higher than in the control group. The levels of triglyceride in the athletes' group was lower than in control group. Conclusion : These data suggest the importance of exercise in adolescents for the prevention of obesity since it may reduce body fat and increase the height. There was no negative effect of exercise on the age at menarche. We think that more controlled assessment of nutrition, diet habit, hormonal effect and height are warranted to find the correlation with hyperlipidemia and exercise at the adolescent stage.

• 프린팅코리아
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• v.12 no.3
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• pp.44-53
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• 2013

"삼월하늘 가만히 우러러보며 유관순 누나를 생각합니다. 옥속에 갇혔어도 만세부르다 푸른하늘 그리며 숨이졌대요~" 강소천 선생이 지은 유관순 노래다. 삼월이면 어김없이 다가오는 삼일절인데, 삼일절은 인쇄인에게도 특별한 날이다. 1919년 3월 1일 만세운동은 보성사에서 '독립선언서'를 '인쇄'해 배포함으로써 전국적으로 확산할 수 있었기 때문이다. 2013년 94주년 삼일절을 맞아 독립운동에 앞장섰던 보성사와 인쇄인들에 대해 알아본다.

• Journal of Plant Biology
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• v.1 no.1
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• pp.3-10
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• 1958

Streptomycin 은 아직까지 가장 동물체에 안전한 항생물질로 알려져 왔으나, BROWNLEE와 BUSHBY (1948)에 의하면 백혈구가 Streptomycin 처리에 의해 죽는다고 하였다. 본인등은 Streptomycin을 처리한 흰쥐의 백혈구수의 변화와 백혈구 지체의 운동능에 미치는 영향을 조사하였다. 치사를 이르키게하는 최저를 이내인 10mg, 5mg, 2mg. 1mg. 0,5mg을 각각 흰쥐에 주사한 후 일정한 시간내의 백혈구수의 변화를 보면 처리후 1시간에서부터 6시간 사이에 백혈구수가 급격히 감소하며 정상지인 12,000에서 최하 3,000수까지 내려간다. 감소하는 정도는 처리량의 다소에 관계없이 대개동일하게 일어나는 것이다. 감소하는 원인을 추구하고저 쥐의 미부로부터 탐혈하여 이에 Streptomycin을 직접 접촉시켜 백혈구의 운동능을 조사하였다. Streptomycin의 량에 tt례하여 백혈구의 운동속도는 저하한다. 일정량을 초과할 때는 백혈구는 단시간내에 죽는다. 처리량의 다소를 불문하고 일정한 정도로 수의 감소가 일어나는 것과는 달리 백혈구의 운동능은 량에 따라 많은 변화를 가져온다. 이것으로 보아 백혈구수의 감소와 운동능의 저하와는 특별한 관계가 없는 것으로 보며 백혈구수 감소의 원인에 대해서는 추후 실험에서 밝혀야 할 것이다.

• Journal of Aquaculture
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• v.17 no.3
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• pp.173-179
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• 2004

The quality of cultured fish was evaluated in this study by using physicochemical method. The speed of a current was taken a decision 0.5 m/s by a preliminary experiment. No-exercise trained group was not much significantly changed moisture content, lipid content, collagen content and breaking strength during cultured time (P＞0.05). But moisture content of exercise trained group was 72.05$\pm$1.45% at the first time and increased to 3% after 20 days. Lipid content was initially 5.36$\pm$0.90% and reduced to 46% during the cultured time. The breaking strength increased during cultured time, on the contrary collagen content did not change significantly. Relation between each elements during the cultured time, moisture content and lipid content was significantly correlated with breaking strength (P＜0.05, r=0.60 and P＜0.05, 0.56). But relation between breaking strength and collagen content was not clear (P＞0.05, r=0.16). These results were suggested that the increase of breaking strength after exercise was affected by lipid content not collagen content.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1995.10a
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• pp.191-196
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• 1995

지지부에 비틀림 하중을 받는 Elstica는 비틀림 운동을 하며, 그 가진 주파수가 굽힘모드 근처일 때는 해당하는 굽힘 모드의 운동까지도 동시에 존재하게 된다. 이때 가진력의 크기가 작을때는 주기적인 운동이 된다. 가진력의 크기가 증가함에 따라 굽힘 운동은 굽힘 1차 모드와 연성된 유사주기운동이 발생하며, 이떤 범위 이상이 되면 굽힘 운동과 비틀림 운동이 결합된 진폭이 매우 크고 불규칙적인 비평면 운동(out of plane motion)이 발생하게 되며 이 때의 운동은 혼돈운동이다. Elastica가 굽힘 3차 고유진동수 근방의 주파수로 비틀림 하중을 받을 때의 정확한 이론적 해석을 위해서는 굽힘 3차모드 까지는 반영할 수 있는 식이 모델링 되어야 할 것으로 보인다. 이것은 복잡한 비평면운동을 할 때 굽힘 3차 모드까지 관찰된다는 사실에 근거한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.94-103
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• 2021

The purpose of this study was to identify the association between regular physical activity (PA) types and metabolic syndrome (MetS) in fertile women. Data were obtained from the seventh Korea National Health and Nutrition Examination Survey (KNHANES VII-3, 2018). The sample consisted of 4,172 fertile women over 19 years of age. The data were analyzed using an independent t-test, χ2 test, and multiple logistic regression analysis for examining the association of regular PA and MetS. The prevalence of MetS in fertile women was 3.1% (n =128), and 1,972 fertile women (47.2%) practiced regular PA. Compared to the non-regular PA group, regular PA resulted in a significantly lower systolic blood pressure (p =.002), lower waist circumference (p <.001), lower fasting blood sugar (p =.007), and higher high-density lipoprotein cholesterol (p <.001). After controlling the confounding variables, multiple logistic regression showed that the regular PA group (odds ratio 0.59, 95% confidence interval 0.35-0.98, p =.040) and the regular muscle-strengthen PA group (odds ratio 0.34, 95% confidence interval 0.14-0.80, p =.013) were associated with a decreased risk of MetS. Therefore, regular PA, including muscle-strengthen PA should be considered to develop effective MetS intervention in fertile women.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.5 no.1
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• pp.1-10
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• 2011

Our study is to verify validation of exercise effect that developing exercise and rehabilitation instrument using pneumatic actuators available rehabilitation and healthcare, while at the same time safer and more convenient for the user to select the desired exercise. Shares subject to the usual exercise is conducted in less than a week in the knee extension and flexion at the undergraduate level there is no more than 10 of the 20 patients were female. Subject performed knee exercise 3 set a day with 12times a set using fluid type exercise instrument and pneumatic exercise instrument that build in this study. Experiment has progressed in 4-weeks with 3-days a week. Our exercise load consist of two type. One is active exercise load with developed instrument in our study and the other one is passive exercise load with fluid instrument. Exercise program based on real-time muscle activation patterns and muscle activity before and after exercise by comparing the effects of exercise for rehabilitation has been verified. The results showed that muscular activity is higher in active exercise load than passive load, and improvement of muscle strength more increased too. Equipment more user-centered exercise more effectively exercise may enhance muscle strength was found. This study can adapt rehabilitation program and exercise for patient and weaker. Also our system can provide easily and convenient prescription of rehabilitation for expert related rehabilitation.