• Advances in environmental research
• /
• v.4 no.2
• /
• pp.105-117
• /
• 2015

The groundwater is a very important part of the environment and must be protected for the benefit of the present and future generation. The contamination of soil and groundwater by chemicals has become an increasing concern in the recent past. These chemicals enter the groundwater system by a wide variety of mechanisms, including accidental spills, land disposal of domestic and industrial wastes and application of agricultural fertilizers. Once introduced into an aquifer, these contaminants will be transported by flowing groundwater and may degrade water quality at nearby wells and streams. For improving the management and protection of groundwater resources, it is important to first understand the various processes that control the transport of contaminants in groundwater. Predictions of the fate of groundwater contaminants can be made to assess the effect of these chemicals on local water resources and to evaluate the effectiveness of remedial actions. In this study, an attempt has been made to investigate the behaviour of solute transport through porous media using laboratory experiments. Sodium chloride was used as a conservative chemical in the experiment. During the experiment, pulse boundary condition and continuous boundary conditions were used. Experimental results have been presented for conservative solute transport in the sand. The pattern of the break through curve remains almost same in all the cases of varying flow rate and initial concentration of conservative chemical.

• Hwankyungkyoyuk
• /
• v.18 no.2 s.27
• /
• pp.1-13
• /
• 2005

The purpose of this study was to investigate the environmental awareness and attitude of elementary school teachers. For this study, 100 elementary school teachers from H graduate school of education were sampled. The results of this study were summarized as follows. First, the biggest concern of environmental problems were water-pollution and garbage problems by the lack of understanding about the environment and injudicious development. Second, most teachers recognized the need for environmental education and they answered that they were doing best to teach students with the main purpose of helping them develop values of environmental preservation. Third, most environmental education was carried out during class using current events and the emphasis on garbage separation and recycling. They also showed the lack of teaching materials and field trips for environmental education. Fourth, it appeared to come from media-oriented environmental education. Most teachers mainly used newspapers and visual materials. 1'hey were obtaining knowledge and information related to environmental education through the media. Since in-service teachers' conceptions could directly effect present education, it is necessary to establish a more systematic educational system for environmental education, for in-service elementary school teachers.

• Journal of Korea Game Society
• /
• v.14 no.4
• /
• pp.7-16
• /
• 2014

This empirical study is to investigate the influence of MMORPG player's social as well as individual characteristics on the emergent party play. First, we have tested our research model by surveying 231 active players of Lineage 2. The results demonstrate that both the personal values, such as self-efficacy and job satisfaction, and also the organizational values, such as task interdependence and trust, have significant influences on the organizational citizenship behaviors among the party players. This study suggests both theoretical and practical implications on how to encourage gamers' altruistic concern and organizational adaptation in MMORPG.

• Childhood Kidney Diseases
• /
• v.23 no.2
• /
• pp.77-85
• /
• 2019

Contrast-associated acute kidney injury (CA-AKI) is a major concern when iodinated contrast material is administered, especially in patients at risk. Efforts have been undertaken to understand the detrimental effects of contrast media (CM). With the use of low-osmolar or iso-osmolar CM the incidence of CA-AKI has steadily decreased within the past decade; however, especially in the pediatric population information is scarce. Incidence rates have been reported to range between 0% to 18.75%, particularly depending on indication, selection of population (i.e. preexisting co-morbidities), and definition of AKI. Different biomarkers have been proposed, but confirmatory studies are either lacking or have contributed to their lack of diagnostic power. Proteomic approaches have been employed and may pave the way to such discovery. Prevention strategies have been tested and proposed, but the recently published AMACING and PRESERVE trials have shown that commonly used strategies (such as systematic hydration or administration of N-acetylcysteine) have no role in the prevention of CA-AKI. We propose that thoughtful assessment of one's fluid state is the most appropriate approach and depending on the hydration status diuretics or fluid administration should be provided to achieve an euvolemic state ahead of contrast exposure.

• Korean journal of communication and information
• /
• v.46
• /
• pp.511-555
• /
• 2009

Media-related regulations can be classified into two categories; regulations of individual media contents and regulations regarding the entry to and withdrawal from a certain field. In this dissertation, ownership regulations are regarded as legal and political measures so as to prevent the monopoly and oligopoly of public opinion, and to secure its diversity. Every country has its own regulation model according to its particular media environment. Korea too is obliged to actively respond to its environmental changes, at the same time vitalizing the media industry and protecting consumers' rights and interests. Strong political intentions to protect the public interest is necessary when it comes to media regulation policies, especially in the circumstances that public interest is an industrial priority. As the convergence of broadcasting and telecommunications is leading to a major shift in the media industry, the regulation of cross-media ownership is an issue involving potential conflicts among media-owners, non-governmental organizations and the authorities concerned, depending on their various viewpoints regarding the media industry. In this paper, an attempt was made to search necessity of redefining 'public interest', which is the logic behind the restriction of cross-media ownership, and to reconceptualize issues on the centralization and diversity of media. First, an examination of the actual conditions of newspaper companies was carried out in order to reinvestigate domestic cross-media ownership issues, which is represented by the cross-ownership issue of newspapers and broadcasting stations. Next, the dilemma of policies stimulated by the fusion of media was discussed based on cross-media ownership restrictions, and the need for efficient conflict control was suggested. Finally, proposals on the independency and public confidence of media-related policy-making authorities, the rationalization of regulation models, an itemized discussion on cross-media ownership regulation issues, the elaboration of measures for a balanced development among media were made. It could be found that a number of foreign countries were still facing challenges to prevent monopoly and oligopoly of the public opinion and the industry. A solution to settle disagreements about the dilemma of the media industry, including the cross-media ownership regulation issues, must be arranged on the grounds of 'mutual respect of public interest and industrial interest', In Korea, an ease on the ownership regulations adapting to the change in the media industry may be considered, however the softening of the cross-media ownership regulations must be approached with the utmost care. Paradoxically Relieving cross-media ownership regulations may be considered the foundation of a richer field of journalism, where there is no need for concern over the monopoly and oligopoly of public opinion.

• The Journal of the Korea Contents Association
• /
• v.9 no.2
• /
• pp.216-232
• /
• 2009

The purpose of this paper is to examine the ethical implications in UCC participation. This paper aimed at examining the advent of UCC as a critical media tool in interactive two-way communication and the effect of ethical questions on the level of UCC participation. The findings show that uncertainty avoidance gives an positive and significant effect on privacy concern and regulatory preference, but it is not related to copyright invasion in Korea and U.S.A. It is shown that privacy concern does not influence on UCC retrieval in Korea whereas it is positively related to UCC retrieval in the United States. Also, privacy concern has not relationship with UCC production(modification, recreation, generation) in both nations. In the case of regulatory preference, it posits an significant and positive effect on UCC retrieval in Korea while it is not related to UCC retrieval in the United States. Also, regulatory preference does not affect on UCC production in Korea whereas it influences on UCC generation without impacting UCC modification and recreation in U.S.A. Finally, the results show that copyright invasion has stronger relationship with UCC recreation and generation than UCC modification, and it is positively related to UCC retrieval in both nations.

• Journal of Science of Art and Design
• /
• v.3
• /
• pp.5-32
• /
• 2001

At the beginning of 21st Century, human desire of communication is forwarding to the Cosmos The way of Communication is going to be not by simple methodology but by the complicated methodology with high technology. It will not be monologue communication but be interactive communication, that will make intelligence Infra, which could be able to communicate from the location of information is present to which is not present; and the multi-media which will be able to solve the technical problems of these communication; will be developed continually. In the genre of plastic art, there are no exception in these changedness. More developed and proceed to develope intermedia could be able of intercommunication. The more development of technology could be able to the more development of new plastic art. Furthermore the development of science make the genre of art to be changed. There are no exception of this changedness in any part of society, The art always has been guided by the person who has proceeding idea for new value. The 21st century plastic art will be in the procedure of the intercommunication. Human-being's concern is to communicate with Universe, and that will be multi-dimension$(4{\cdot}5{\cdot}6{\cdot}7{\cdots}dimension)$ communication beyond our usual recognition. To conjoin this, the possibility of cyber space expressing is going to be considered, and the way is being done by the development of the Media Art, which is able to go and back to the cyber-space. And the message will be so complicate beyond our recognition. Because we will need to communicate with various newly-built vocabulary, so we need to magnify the repertories of new vocabulary.

• Proceedings of the Korea Society of Environmental Toocicology Conference
• /
• 2003.05a
• /
• pp.149-149
• /
• 2003

To understand environmental paths of the transport and accumulation of endocrine disrupting chemicals (EDCs), a single cell multimedia fate model has been constructed and evaluated. The EDCs of concern were PAHs, Organochlorine Pesticides (OCPs), PCBs, Alkyl phenols, and phthalates. An evaluation model was designed for the multimedia distribution, including air, water, soil, sediment and vegetation. This model was verified using reported values and via monitoring data. Based on collected data, the distribution trends of EDCs with respect to environmental media were analyzed. Those results have applied to the model for the prediction of the spatial and temporal distribution of EDCs in Seoul. Especially, phenol compound, phthalates, PAHs, PCBs and organochlorine pesticides were estimated and the model was verified. This model was successfully conducted to environmental media, such as air (vapor and suspended particles), soils (forest soil, bare soil, and cement-concrete covered soil), water (dissolved and suspended solids), sediment, trees (deciduous and coniferous). The discrepancies between the model prediction and the measured data are approximately within or near a factor of 10 for the PAHs of three rings through that of six rings, implying that multimedia distribution of the PAHs could be predicted with a factor of 10. Concerning about the air equilibrium may be assumed, a fugacity at steady state is similar in all environmental media. Considering the uncertainties of this model, the use of equilibrium models may be sufficient for assessing chemical fates. In this study, a suggestion was made that modeling and estimation of chemicals in environmental multimedia be rigorously evaluated using the measured flux data. In addition, these data should be obtained, for example, from the precise and standardized inventory of the target chemicals. The model (EDC Seoul) will be refined in an on-going research effort and will be used to support decision-making concerning the management of EDCs.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.12 no.1
• /
• pp.101-112
• /
• 2005

Purpose: To investigate the status of health education courses in elementary schools. Method: From September to December in 2003, 607 school nurses were surveyed by questionnaires. Results: 1) Of the schools, 32.1% had health education programs as part of the school health service. A higher proportion was found in schools in suburban and rural areas. Mass media in health education was used by 75% of school nurses. Regular classes were more frequently utilized in schools in rural areas, while the classes in health-related subjects were utilized in urban areas. For 20.6% of school nurses, there was a substitute person to provide health care while the nurse was in health education classed, but 94.2% of school nurses found they had to give up health education due to pressure from other health services. 2) Of the nurses, 97.0% felt the need to provide health education courses, but 60.6% insisted that their work load needed to be modified and supplemental personnel were necessary if health education courses were to be provided. 3) More than 30% school nurses responded that educational materials and media, and concern by teachers and administrators were insufficient. 4) School nurses suggested that the content for health education courses should include healthy life and dental health care for students in lower grades, dental health care, sex education and safety for students in middle grades, and sex education and drug abuse prevention for students in higher grades. Conclusion: There is an urgent need to provide health education courses in elementary schools but conditions in the schools are not satisfactory. For successful school health services, personnel supplement, modified work loads and sufficient educational materials and media should be in place before health education courses are provided.

• Korean Journal of Mathematics
• /
• v.17 no.4
• /
• pp.349-359
• /
• 2009

As students have been familiar to Internet or media which has big visual effects rather than letters, they preferred the class in computer lab to theoretical class. The class in computer lab showed all the students good reactions in concern and interest. Statistics achievements of high level students in 2008 became better than that in 2007 but those of low level students became worse than that in 2007. I analyze the reason why the achievements of low level students have become worse. The purpose of this study is to supplement of the trouble of the class in computer lab and find out a better teaching and develop mathematics education's satisfaction and qualification.