• Applied Microscopy
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• v.29 no.1
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• pp.11-23
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• 1999

Ultrastructure of the ependymal cells of X-irradiated rats on their head were studied. Rats weighing $200\sim250gm$ were X-irradiated on their head and neck areas. Total exposures were 3,000 rads or 6,000 rads depending on experimental groups. And irradiated rats were sacrificed on 6 hours, 2 days and 6 days following the radiation exposures. Animals were perfused through the heart with 1% glutaraldehyde-1% paraformaldehyde solution, under ether-anesthesia. The tissues from the wall of lateral ventricles were fixed in the 2% osmium tetroxide solution. The results observed with electron microscope were as follow: 1. In 6 hours group, many ependymal cells were swelled, luminal portions of cytoplasms of some cells protruded into the ventricular lumen, and many cilia were lost or irregularly altered. 2. In 2 days group, ependymal cells were swelled more severely and subependymal edema were pronounced. 3. Protruded cytoplasm contained usually basal bodies of cilia, groups of mitochondria, endoplasmic reticula , etc. 4. Following X-irradiations, some protruded masses contained neural elements including the axon terminals with dense core vesicles. Axons and axon terminals were also found in the enlarged intercellular spaces among ependymal cells. From the above results, the heavy irradiation on the head area of the rat induced alteration of the ependymal cells lining the lateral ventricle. Hence the ependymal functions of selective barrier, protective barrier, and metabolic barrier could be altered following X-irradiation on the head.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.9
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• pp.2509-2515
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• 2009

This study compared the relative effectiveness of trunk stability exercise with general balance exercise on dynamic balance for patients with chronic patients. Thirty eight subjects were recruited and randomly divided into two groups. One group was trained trunk stability exercise and the other group was trained general balance exercise. This process was carried out three times a week for seven weeks. Dynamic balance was measured prior to commencement of the exercise programs, and again after seven weeks, when the programs were completed, in order to establish the effectiveness of both exercise programs. Both the trunk stability exercise and the general balance exercise increased BBS and TUG(p<.001). The trunk stability exercise was more effective at increasing BBS(p<.05). We suggest that trunk stability exercise is effective in the improvement of balance ability in the persons with chronic stroke. Therefore, the trunk stability exercise is considered to important when the stroke patients are trained. Further studies of effectiveness of trunk stability exercise should be carried out to increase our understanding of this area of study.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.8
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• pp.594-603
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• 2019

This purpose of this study is for an Airline company to discover and utilize new knowledge because knowledge and information are considered core tools for achieving high performance and competitive advantage, and achieving high performance and competitive advantage will surely determine the long-term survival of airline companies. Therefore, this study aims to reveal the causal relationships among different types of organizational culture, the knowledge sharing activities and the effectiveness of organizational work by airline members from a holistic viewpoint. The results of analysis are as follows. First, when examining the effects of the organizational culture types of airline members on knowledge sharing, a creative innovation culture, a relational group culture and a hierarchical orientation culture all showed positive effects on knowledge sharing. Second, the knowledge sharing by airline members showed a significant positive effect on the effectiveness of organizational work. Third, the creative innovation culture, the relational group culture and the hierarchical orientation culture all showed positive effects on the effectiveness of organizational work. Fourth, knowledge sharing did not have a mediating effect on the relationship between organizational culture and the effectiveness of organizational work.

• (The)Study of the Eastern Classic
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• no.36
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• pp.333-374
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• 2009

Korean traditional education emphasizes moral education than any other country or culture. Education is recognized as practical task for self-realization and self-transcendence in traditional Confucian community. This study starts from two questions. First, how moral education in Korea from late in the 19th, when the modernized schooling started, to now can be classified according to social and political circumstances? Second, what is the main issue of moral education in the progress of Korean education after independence from Japanese imperialism? Especially, this study focuses on reflecting and reviewing these issues by context of Eastern moral education. After late in the 19th century, moral education in Korea is divided into three types: "Education for loyalty and filial piety and Moral cultivation", "Citizenship education and Education for anti-communism", and "Moral education and Character education". This study mainly insists these types of moral education distort the sprit by political interests rather than inherit and develop sprit or basic value of moral education. Furthermore, this study discusses characteristic of moral education and way to improve based on important two issues in Korean society; "Nationalism in moral education" and "Western biased education" Making individual's free will into group consciousness in accordance with political power group's interests rather than developing moral community based on each one's character building, nationalism in moral education deepens self-alienation. Western biased education makes self-negation as it considers western as core, and Korea and other traditional ideas as side. This study emphasizes reanalysis Eastern moral education and need effort for understanding of Eastern moral education to overcome Western biased education in Korean moral education.

• Maritime Security
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• v.3 no.1
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• pp.73-114
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• 2021

This study examines the distribution of power in Northeast Asia based on the balance of power theory, a representative theory of realism, assuming military capabilities as the core power of states. The results of previous studies on the balance of power and military forces are reviewed and used to analyze changes in the strength of the US, China, Russia, Japan, South Korea, and North Korea through 2020 to predict the security environment in 2030. In the balance of power theory, if the balance of power between a nation or a group of powers collapses, the possibility of war is high, and to survive in the international community with high uncertainty and distrust, the theory predicts that states must increase their powers in a self-help world and strengthen cooperation and alliance. Countries in Northeast Asia are also continuing to strengthen their military capabilities, and countries neighboring China are paying keen attention and remaining vigilant due to the rapid changes in the international security environment after the rapid rise of China. To mark the future 100th anniversary of the Chinese armed forces in the 2030s, China aims to realize 'defense and military modernization' and build a 'world-class military force' by the nation's 100th anniversary in the 2050s. The US is busy checking China's rise by strengthening international cooperation and alliances. The security environment and power dynamics in Northeast Asia are slowly changing as the US and China continue to compete for global hegemony. The changes and implications of the distribution of power in Northeast Asia after 2030 are examined based on the balance of power theory.

• Korea Trade Review
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• v.41 no.5
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• pp.63-87
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• 2016

Despite its rising labor costs these days, China still serves the role as 'World's Factory' thanks to a great deal of foreign direct investment, still remaining one of the world's highest, and the global companies, which have been willingly establishing foreign subsidiaries in China. While enjoying the benefits from the Chinese market, these global companies can now take advantages of another market; the one of Korea. If a product produced by a certain global company is actually manufactured in the local factory in China and the product meets specifications of Rules of Origin, the product shall receive preferential treatment under China-Korea FTA. In the perspective of global market, therefore, it is found that China-Korea FTA may have negative effects on chemical industry in Korea, which is considered one of the representatives of China-Korea FTA. This study examines such risks by network analysis, with several cases of 'Beauty or Make-up Preparations (HS Code 3304).' Analysis shows that Korea is classified as the marginal country group but not main country group when it comes to beauty products family. So this can be a great chance to the global cosmetic companies with local factories in China in the sense that they can increase their sales towards the market of Korea based on the China-Korea FTA. Under these concerns, this study suggests two policy alternatives for the chemical industry in Korea to deal with current challenges rising from China-Korea FTA. The suggested alternatives are: to actively attract the global chemical corporations which are yet to directly enter the Chinese market; and to invest on chemical products with high potential of growth as a priority.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.1D
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• pp.129-136
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• 2008

Along with the development in cutting-edge digital technology, the street space is also being changed. Mobile telecommunication units and internet give a big change in a human being's lifestyle. And the ubiquitous computing is proceeding with expanding its application range from the indoor space to the street space. As the street furniture is the convenient facility that allows a human being's life in street space to be abundant, it is getting advanced. First of all, in terms of such phenomenon, this study analyzed the cases of a research on application of street space and the actual condition of a change in the number of individuals for the street furniture, through a literature research of ubiquitous. Also, it researched into the realities of using the street furniture of the walking-desired streets at Daehac-ro and Hongdae district, where are two representative places related to digital generation. The next was carried out FGI (Focus Group Interview) with users of the street space in front of Hongik University and managers of the street furniture, and was researched into the use & management behavior, and recognition level on the street furniture. Thus, the key elements were extracted such as interchange of information for cultural activities, automation for interaction variability in function. Finally the core elements for future vision of street furniture in this digital era were extracted in 3I, namely, Information, Intellectualization, and Integration. This is considered to be applied to the establishment of direction in the process of high-tech digitalization in street furniture related to information hereafter.

• 한국노년학
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• v.31 no.3
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• pp.733-749
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• 2011

The purpose of this research are as follows. The first is to investigate the mediating effect of interpersonal skill on the relationship between the ability to use Internet and social activity among the 50's and 60's. The second is to compare 60's latent mean of core variables with 50's ones in terms of information gap. The data was Seoul welfare panel data made by Seoul welfare foundation in 2008 and the total subject was 941(50's=644, 60's=297). When it comes to the research methods, structured equation analysis for verifying the mediating effect and latent mean analysis for comparing the two groups were practiced. The results of this research are as follows. First of all, interpersonal skill did function as partial mediator. Second, according to the latent mean analysis, the group of 50's showed a more higher level of the ability to use Internet. On the other hand, the group of 60's revealed a more active social participation. In conclusion, Information educational programs should focus on Internet communication skill for enhancing social activities of the elderly and consider the differentiations among the elder generations.

• Asia Marketing Journal
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• v.10 no.4
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• pp.35-64
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• 2009

In an effort to increase our understanding of green buying behavior, the present study proposes and tests a comprehensive model of how values influence attitudes toward the environment and preferences for green products in a cross-cultural setting. Data were collected from a survey with consumers in two cultures, diametrically different on values salient to environmental consumerism, the U.S. and Korea. As a result of model testing both at the national and multi-group levels, a refined, final model is presented. While the core human values were found to relate to environmental attitudes and green buying behavior, the patterns of the relationships among the variables emerged to differ between the two cultures, highlighting the importance of cross-cultural investigations in this area. Results suggest that biospheric values significantly influence environmental attitudes and green consumption in both countries. However, the effects of egoism were significant among American respondents whereas altruism appeared to have a significant influence on attitude and behavior in the Korean sample. Findings of this study should aid international marketers in their understanding of what drives consumers' green buying behavior in different cultural settings.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.135-140
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• 2017

This study was conducted to investigate the effects of mixing with unfamiliar piglets on changes in the body surface temperature of sows and piglets during the suckling period. A total of 123 pigs (12 sows and 111 piglets) were used for this study. A control group of piglets of the same litter was maintained in the farrowing pen and compared to a treatment group of piglets of three different litters mixed by removing the partition in the farrowing pen. In the treatment group, mixing of piglets was performed at 10:00 a.m. on day 11 after parturition, and the body surface temperature of sows and piglets was taken using a thermo-graphic camera at 30 minutes after mixing. In the case of sows, the average surface temperature of the treatment group ($37.1^{\circ}C$) was significantly higher than that of the control ($36.3^{\circ}C$; p<0.05); however, the hot spot temperatures did not differ significantly between groups. In contrast, the average surface temperature of piglets was significantly decreased by mixing (37.5 and $36.0^{\circ}C$ in the control and treatment, respectively; p<0.01). Moreover, the hot spot temperature tended to be lower in the treatment ($39.1^{\circ}C$) than the control ($39.4^{\circ}C$), although there was no significant difference (p=0.079). These results suggest that mixing of unfamiliar piglets during the suckling period leads to changes in the body surface temperature of sows and piglets. In the future, the correlation between body surface temperature and body core temperature should be analyzed, and additional studies investigating the effects of mixing on the physiological changes in sows and piglets are required.