• International Journal of Oral Biology
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• 제33권3호
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• pp.91-95
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• 2008

Embryonic stem cells have a pluripotency and a potential to differentiate to all type of cells. In our previous study, we have shown that embryonic stem cells (ESCs) lines can be generated from murine parthenogenetic embryos. This parthenogenetic ESCs line can be a useful stem cell source for tissue repair and regeneration. The defect in full-term development of parthenogenetic ESCs line enables researchers to avoid the ethical concerns related with ESCs research. In this study, we presented the results demonstrating that parthenogenetic ESCs can be induced into osteogenic cells by supplementing culture media with ascorbic acid and $\beta$-glycerophosphate. These cells showed morphologies of osteogenic cells and it was proven by Von Kossa staining and Alizarin Red staining. Expression of marker genes for osteogenic cells (osteopontin, osteonectin, alkaline phosphatase, osteocalcin, bone-sialoprotein, collagen type1, and Cbfa1) also confirmed osteogenic potential of these cells. These results demonstrate that osteogenic cells can be generated from parthenogenetic ESCs in vitro.

• The Journal of Korean Physical Therapy
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• 제22권3호
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• pp.9-15
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• 2010

Purpose: To evaluate, in patients with degenerative disc disease (DDD), the efficacy of using spinal stabilizing exercises for the reversal? of atrophy of the multifidus and psoas major, reductions in pain and disability, and for increases in paraspinal muscle strength. Methods: Nineteen patients diagnosed with DDD participated for 10 weeks in a spinal stabilization exercise program. Pain and disability were measured before and after exercise using, respectively, a visual analogue scale (VAS) and the Oswestry Disability Index (ODI). Paraspinal muscular strength in four directions was evaluated using CENTAUR. Both before and after exercise we used computed tomography (CT) too measure cross-sectional areas (CSAs) of both the left and right multifidus and the psoas major at the upper & lower endplate of L4. Results: After 10 weeks of a spinal stabilization exercise program, pain was significantly decreased from $5.7{\pm}0.9$ to $2.5{\pm}0.9$ (p<0.01); the ODI score decreased from $16.7{\pm}4.9$ to $7.3{\pm}3.1$. Paraspinal muscle strength was significantly increased (p<0.01) and the CSAs of the left and right multifidus and psoas major muscles were significantly increased (p<0.01). Conclusion: Spinal stabilization exercise is effective in reversing atrophy in DDD patients, in reducing pain and disability, and in increasing paraspinal muscle strength. It is an effective treatment foro aiding rehabilitation in these cases.

• 센서학회지
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• 제29권1호
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• pp.40-44
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• 2020

An integrated multifunctional sensor, capable of raising an early electric-fire warning, was fabricated. An arc-light, temperature, and humidity sensor was fabricated on a flexible substrate using a printed thin film of indium tin oxide. A polyethylene terephthalate (PET) substrate was used as the flexible substrate. The sensor was fabricated on a PET substrate, and its operating characteristics were tested. The operating performances of the sensor when serving as an arc-light, a temperature, and a humidity sensor were estimated to be 0.6247 Ω/W, 80.6 Ω/K, and -4.08 Ω/RH, respectively. The feasibility of the proposed fire sensor was demonstrated; it costs low and offers multiple functionalities.

• 한국학교ㆍ지역보건교육학회지
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• 제17권3호
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• pp.117-129
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• 2016

Objectives: This study aimed to provide the high-quality clinical practice environment education to students by researching the social support, major satisfaction, and interpersonal ability of dental hygiene students, analyzing factors having influence on the clinical practice satisfaction, and then increasing the satisfaction with clinical practice. Methods: 312 students who have completed clinical practice among dental hygiene major of three colleges in Gyeonggi province were collected by convenience sampling from April 18th to April 27th 2016. Using SPSS 20.0, descriptive analysis, t-test, ANOVA, correlation analysis, and regression analysis were conducted. Results: The clinical practice satisfaction was correlated with interpersonal ability(r=0.383, p<.001), social support(r=0.239, p<0.01), subjective health condition(r=0.226, p<0.01), and major satisfaction(r=0.287, p<0.01). When interpersonal ability and social support were high, subjective health condition was good, and major satisfaction was high, the clinical practice satisfaction was also high. Conclusions: Based on the results, it would be necessary to develop operational reinforcing social support and interpersonal ability of dental hygiene students, and also to make efforts to increase the clinical practice satisfaction of dental hygiene students by establishing measures to increase their major satisfaction.

• The Journal of Asian Finance, Economics and Business
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• 제7권7호
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• pp.27-34
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• 2020

The study investigates herding behavior in cryptocurrencies in different situations. This study employs daily returns of major cryptocurrencies listed in CCI30 index and sub-major cryptocurrencies and major stock returns listed in Dow-Jones Industrial Average Index, from 2015 to 2018. Quantile regression method is employed to test the herding effect in market asymmetries, inter-dependency and intra-dependency cases. Findings confirm the presence of herding in cryptocurrency in upper quantiles in bullish and high volatility periods because of overexcitement among investors, which lead to high volume trading. Major cryptocurrencies cause herding in sub-major cryptocurrencies, but it is a unidirectional relation. However, no intra-dependency effect among cryptocurrencies and equity market is observed. Results indicate that in the CKK model herding exists at upper quantile in market that may be due when the market is moving fast, continuously trading, and bullish trend are prevailing. Further analysis confirms this narrative as, at upper quantile, the beta of bullish regime is negative and significant, meaning the main source of market herding is a bullish trend in investment, which increases market turbulence and gives investors opportunity to herd. Also, we found that herding in cryptocurrencies exits in high volatility periods, but this herding mostly depends on market activity, not market movement.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.243-244
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• 1998

The second telemetry is designed for supplying additional function which the first telemetry system doesn't have and as a part system of the External Management System (EMS). It makes a patient and an animal move more freely with wireless communication at a distance of free activity from the PC and can get most data from the first telemetry to send to the PC. Recently, our laboratory is developing a RF system for the second telemetry.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.241-242
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• 1998

For the aritificial heart valve, two types of valves-polymer and mechanical valve- are generally used. The polymer valve is used as a new low-cost artificial valve. Among the several properties of the artificial valve, the low-regurgitation property is important because it can provide better cardiac output characteristic. So in this study we analyzed and compared the regurgitation property of the mechanical valve which is generally used nowdays and the polymer valve which was made in our group. As results, the polymer valve showed the better regurgitation property compared to the mechanical valve approximately by 3 times, and increased the cardiac output by 10%.

• 한국연초학회지
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• 제15권1호
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• pp.15-25
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• 1993

The severities of major tobacco diseases had been surveyed throughout northern Kyeongbuk, a major flue-cured tobacco growing district in Korea, in relation to the actual control method used by the farmers in 1992. At seedling stage, anthracnose caused by Colletotrichum nicotianae was major disease of the plant due to poor damage of the temporary transplanting pots. Mosaic caused by tobacco mosaic virus(TMV) was very severe in certain of greenhouses. Although viral disease caused by TMV, cucumber mosaic virus(CMV) and by potato virus Y(PVY) were severe in fields, but mosaic by TMV was major of the diseases. Potato virus Y was found later than that in Honam district. The late occurrence of the disease might be caused the difference between cultivating method of potato plants in northern Kyeongbuk and that in Honam district. In fields suffered from hail disaster, the damage of tobacco plants by angular leaf spot was severe. Most of tobacco growers had wrong information about the practical methods not only of milk treatment for the protection of the plants from TMV, but also of fungicide applications for the control of other major diseases. It suggested that education on the methods to the farmers must be very important for control of the diseases.

• 한국치위생학회지
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• 제14권2호
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• pp.155-162
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• 2014

Objectives : The purpose of this study was to examine the effect of self-resilience and self-efficiency on the satisfaction with major in dental hygiene students. Methods : The data were analyzed by the frequency analysis, one-way ANOVA, Duncan post-hoc analysis, correlation analysis, multiple regression analysis using SPSS 18.0. The subjects were 411 dental hygiene students in A University in Gyeongsangbuk-do and K-University in Gyeongsangnam-do from November 4 to 15, 2013. Results : The satisfaction with major in dental hygiene students showed the positive correlation with self-resilience and self-efficiency. Multiple regression analysis revealed the optimistic attitude towards the self-resilience and self-efficiency. The explanation power was 13%. Conclusions : The self-resilience and self-efficiency had a positive effect on the satisfaction with major. It is necessary to develop the program that can help increase the self-resilience and self-efficiency, and apply such program to the curricula.

• 수산해양교육연구
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• 제22권4호
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• pp.477-489
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• 2010

This study tends to analyze the organizational factors of major curriculum of education department. For this, the education department's major curriculum of ten universities is analyzed in three levels. Subjects are analyzed for the high level, lesson plans for the middle level, and sub-topics for the low level. This study utilized the learning classified table of the Natioanl Research Foundation of Korea and the In-sil Chang's curriculum scope classified table. The results from the study are following. First, some subjects such as educational philosophy, educational psychology, life-long education take largest portions in the major curriculum of education department. Second. the history, the evaluation, and the definition and the scope of the education curriculum take greatest parts in the subject of education curriculum. It is expected that the findings of the study may provide the opportunities to introspect on the discussion and the organization of the educational directions and goals of education department.