• Information Systems Review
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• v.12 no.1
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• pp.145-164
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• 2010

Since the third generation (3G) mobile communication service has been launched by most mobile communication operators in Korea, the portion of data service in mobile communication service becomes one of the most important factors in mobile communication service market. In past mobile communication market, most mobile communication operators made their profit mostly from voice communication service. However, the portion of profit from data service has gradually increased based on both video phone call and mobile Internet service. In this situation, LG telecom launched the full browsing mobile Internet service. This service provides a new type of mobile Internet service platform which enables to access the World Wide Web using mobile browsers, so we generally access the Web using web browsers in the desktop computer. Under the open network structure of mobile Internet like situation, it is very important to analyze the factors which can affect the competition between mobile communication service companies. So, in this paper, we first present the current state of full browsing service, followed by the expectation of its growth potentials and barriers. Then, we analyze the advantages and disadvantage of LG telecom as a first-mover and SK telecom/KTF as followers. Finally, based on this analysis, we predict the future competition among these companies and the market.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.38 no.1
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• pp.55-63
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• 2012

The odontogenic keratocyst (OKC) was originally classified as a developmental cyst, and OKCs were histologically divided into orthokeratotic (O-OKCs) and parakeratotic (P-OKCs) types. Clinical features differ between O-OKCs and P-OKCs with P-OKCs having a tendency to recur after surgical treatment. According to the revised histopathological classification of odontogenic tumors by the World Health Organization (2005), the term keratocystic odontogenic tumor (KCOT) has been adopted to describe P-OKCs. In this retrospective study, we examined 186 KCOTs treated at the Maxillofacial Surgery Department of the Tokyo Medical and Dental University Hospital from 1981 through 2005. The patients ranged in age from 7 to 85 years (mean, 32.7) and consisted of 93 males and 93 females. The most frequently treated areas were the mandibular molar region and ramus. The majority of KCOTs in the maxillary region were treated by enucleation and primary closure. The majority of KCOTs in the mandibular region were enucleated, and the wound was left open. Marginal resection was performed in the 4 patients with large lesions arising in the mandible. In patients who were followed for more than a year, recurrences were observed in 19 of 120 lesions (15.8%). The recurrences were found at the margins of the primary lesion in contact with the roots of the teeth or at the upper margins of the mandibular ramus. Clinicians should consider aggressive treatment for KCOTs because the recurrence rate of P-OKCs is higher than that of other cyst types such as O-OKCs, dentigerous cysts, primordial cysts that were non-keratinized, and slightly keratinized stratified squamous epithelium. Although more aggressive treatment is needed for KCOTs as compared to other cystic lesions, it is difficult to make a precise diagnosis preoperatively on the basis of clinical features and X-ray imaging. Therefore, preoperative biopsy is necessary for selecting the appropriate treatment for patients with cystic lesions.

• Korean Journal of Remote Sensing
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• v.28 no.4
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• pp.421-434
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• 2012

Colored Dissolved Organic Matter (CDOM) is one of the important components of optical properties of seawater to determine ecosystem dynamics in a given marine area. The optical characteristics of CDOM may depend on the various ecosystem and environmental variables in the sea and those variables may vary region to region. Therefore, the retrieval algorithm for determining light absorption coefficient of CDOM ($a_{CDOM}$) using satellite remote sensing reflectance ($R_{rs}$) developed from other region may not be directly applicable to the other region, and it must be validated using an in-situ ground-truth observation. We have tested 6 known CDOM algorithms (three Semi-analytical and three Empirical CDOM algorithms) developed from other regions of the world ocean with laboratory determined in-situ values for the East Sea using field data collected during seven oceanographic cruises in the period of 2009~2011. Our field measurements extended from the coastal waters to the open oceanic type CASE-1 Waters. Our study showed that Quasi-Analytical Algorithm (QAA_v5) derived $a_{CDOM}$(412) appears to match in-situ $a_{CDOM}$(412) values statistically. Semi-analytical algorithms appeared to underestimate and empirical ones overestimated $a_{CDOM}$ in the East Sea. $a_{CDOM}$(412) value was found to be relatively high in the relatively high satellite derived-chlorophyll-a area. $a_{CDOM}$(412) value appears to be influenced by the amount of chlorophyll-a in seawater. The outcome of this work may be referenced to develop $a_{CDOM}$ algorithm for the new Korean Geostationary Ocean Color Imager (GOCI).

• The Journal of the Korea Contents Association
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• v.12 no.10
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• pp.169-177
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• 2012

Due to the influences of global financial crisis, countries are putting their efforts on the enhancement of appropriateness and transparency of director compensation. In several countries including Germany, the United States, the United Kingdom, France, and Italy, listed companies and financial institutions in certain levels make public announcement for compensations of individual directors, not the averages. Recently, even Asian countries including China, Hong Kong, and Singapore are introducing individual director compensation public announcement policies. On the other hand, in cases of companies, which must submit annual reports, under current Korean capital market laws and enforcement ordinances, they are obligated to mention 'total wage paid to all executives in that business year' on the annual report, but does not have to mention individual wages of each executive. About this, at the 17th national assembly, revised bill for the Securities and Exchange Act for companies to mention wages of each executive. The financial world is opposing to open individual director compensation to the public as they concern about the shrinking of outstanding human resources recruitment, breach of corporate confidence, privacy invasion, deterioration of labor-management relations, and downfall of the executive's management will as director compensation will be standardized downward; however, if public opening of individual director compensation is forced, domestic companies will prepare more objective and rational standards when they calculate director compensations, and moreover, it will prevent arbitrary intervention of dominant shareholders. Therefore, to clearly and efficiently control director compensation, we need regulations for obligating public opening of individual director compensation.

• Current Photovoltaic Research
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• v.8 no.3
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• pp.67-78
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• 2020

A novel energy production system which has fascinated a wide consideration because of its several benefits that are called floating photovoltaic technology (FPVT). The FPVT system that helps to minimize the evaporation of water as well as an increase in energy production. For the research purposes, both electrical and mechanical structure requires studying of these systems for the development of FPVT power plants. From different points of views, numerous researches have been directed on FPVT systems that have evaluated these systems. The present research article give a logical investigation and up to date review that shows the different features and components of FPVT systems as an energy production system is offered. This articles reviewing the FPVT that gets the attention of the scientists who have the investigational stage and involuntary inspection of FPVT systems in addition to influence of implementing these systems on the water surface. Also, a comprehensive comparison has been constructed that shows the cons and pros of various types of solar systems that could be installed in various locations. In this review, it has been found that solar energy on the roof of a dwelling house generally has a power of 5 to 20 kW, while the inhabitants of commercial buildings generally have a power of 100 kW or more. The average power capacity of a floating solar panel is 11% more of the average capacity of a solar panel installed on the ground. Studies show that 40% of the water in open reservoirs is lost through evaporation. By covering only 30% of the water surface, evaporation can be reduced by 49%. The global solar panel market exceeds 100 GW and the capacity of 104 GW will bring the annual growth rate to 6%. In 2018, the world's total photovoltaic capacity reached 512 GW, an increase of 27% compared to the total capacity and about 55% of the renewable resources newly created that come from photovoltaic systems. It has been also predicted by this review that in 2025 the Solar technology including the FPVT system will increase by 7.38% that is 485.4 GW more of today installed power worldwide.

• Korean Security Journal
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• no.33
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• pp.163-195
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• 2012

Various kinds of performances and events have been held by local governments along with the worldwide popularity of K-pop, and there is a growing concern about possible accidents. Actually, a large-scale of accident took place during the MBC pop song concert in Sangju Sports Stadium in October 3, 2005. And another great safety accident occurred during an open event in the Lotte World in Seoul in March 26, 2006. The purpose of this study is to propose improvement of security company that carry out security activity through the analysis of the cases of accidents and common causes in the event sites. The improvement of safety management for large-scale event site by the study are as followings; First, institutional measures should be taken to extend the size of private security companies. Second, more education and training should be provided for security personnels who work for the event. Third, private security companies should prepare for the security measures more thoroughly in advance. Fourth, private security companies should make every possible effort to maintain order in the event site. Fifth, private security companies should bolster their collaboration with relevant organizations. Sixth, security companies should take actions to make themselves completely ready for any possible unexpected situations.

• Journal of Korea Port Economic Association
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• v.33 no.3
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• pp.1-16
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• 2017

China has achieved rapid economic growth in the late 1970s with economic reform and open-door policy. China's economic growth began initially in the eastern coastal areas and from the 2000s expanded to the western and northeastern regions where the economy was relatively underdeveloped. In particular, in 2013 'One-Belt One Road' initiative proposed by Xi Jinping, the current General Secretary of the Communist Party of China is not only a key strategy for China's advancement into the world and also provides important opportunities for the development of these backward regions. Inland Port is the inland logistics hub and plays a crucial role in enhancing access to maritime ports as well as access to adjacent inland countries. Therefore, a number of inland ports have been developed and operated in order to enter into overseas markets and secure resources in the northeastern and western regions of China. This study aims to examine the role and development of inland port in 'One-Belt One Road' scheme. In conclusion, 'One-Belt One Road' will further increase the role of inland port, and in response, the development of inland port will play a pivotal role in one belt one road initiative. In this respect, Korean companies need to consider plans to participate in the development and operation of inland ports in China, which would provide opportunities to spread Northern markets including China, Russia, Central Asia, Eastern Europe.

• Strategy21
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• s.31
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• pp.190-219
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• 2013

Since Korea and Japan established diplomatic relationship, Relationship between Korea and Japan has not been easygoing. There are two most explosive, and noticeable ones among topics which have affected the relationship ; Dokdo and Historical Distortion. Without these issues, relationship between two countries will take a turn for the better. However, unfortunately, it seems that it is almost never going to happen. There is the Japanese conservative right-wing who has an influence on those two issues. The right-wing takes regard getting negative view or finding out dark past as an action from Self-torture view of history, and tries to dilute the Japanese sense of guilt on past invasions to neighbor countries. Moreover, to become a "normal country", they are trying to revise Constitution of the Japan so that Japan can possess the military and re-arm, dispatch troops abroad, and get the right to break the war. In other words, they expect Japan to become a powerful nation with great influence on Asia and world, as the period in which Japan conquered Korean peninsula, China, and South-Eastern nations. Japan still harbours secret romanticism for bygone days of imperialist glory. That is why neighbors want to never make the painful history happen again. In order to deal with this effort, most of all, it is required to assert better argument with a careful, thorough analysis on Japanese opinion about Dokdo. There might be a hidden card which can be accepted in the international society considering Japanese persistent effort to make Dokdo disputed area, and that is why we have to know that it is. In addition, it is needed to secure a high-quality professional manpower because the issues of Dokdo and Historical Distortion are primarily the matter of logic and references. The professional manpower should have open-minded to break down walls of their own majors. We have to introduce our achievements and stances to the international society vigorously. As a definite way to solve these problems, we have to develop national power. We have to possess naval forces and coast guard to protect our territory and Koreans overseas. There are not many options Korea can do to Japan, except protesting denunciation, and pressing a joint efforts. Most of the suggestions stated before are what have to be conducted domestically. It is a miserable condition, because two problems are Japanese domestic issues, but they become international issues and we have to seek a solution for ourselves.

• Korean journal of communication and information
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• v.17
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• pp.61-84
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• 2001

Discussions and debates over media education abound in Korra as the number of both institutions that provide media related education and students enrollment for these programs increases rapidly in recent years. In spite of this rather impressive expansion, however, many have raised serious questions about media education of Korea for its not being able to meet the need of the Industry and students, and, moreover, inability to face the challenges brought by new communication related technologies. Who teaches What for what purposes are some of the fundamental questions underlying these heated debates and discussions. To understand these rather complex and interrelated issues more clearly, it is attempted to delineate the nature of these debates by exploring the evolutionary process of media education. The issues related to debates over purposes of media education, curriculum, and faculty qualification have changed through the history of media education, but the nature of the debates, that is the struggle between professionalism and academism, or the tension between practice and theory, has not. Upon this understanding, some argue that what distinguishes opposing sets of dichotomies, such as skills vs. knowledge, training vs. education, now-how vs. know-why. professional vs. academic, practice vs. theory, is more a reflection of social class division and group interests which have privileged theory over practice than a rational scholastic distinction. In addition, it has been often pointed out that the media studies have failed to establish ties with specific industries, and furthermore academic studies seriously lack solid theoretical and practical bases. In the case of the United States, leaders of the industry had contributed much for the Initiation of journalism education in a college setting. However, once inaugurated,, the process of its evolution has depended heavily on academicians. In a country like Korea, where academic and theoretical orientation is much stronger, these problems of media studies and education are even more acute. In this study, it is suggested that academicians and educators be more open-hearted to the realities of changing world, practices of the industries, and recruitment of professionals and practitioners to fill the gap between practice and theory, for the sake of the future of media studies and education.

• Journal of the Korean Association of Geographic Information Studies
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• v.3 no.2
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• pp.61-72
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• 2000

The maturation of the Web technology has reshaped the ways in which data are accessed, disseminated, and shared. Thanks to its popularity along with the advance of spatial information technology, four major changes have been further made in traditional geographic information systems (GIS) in relation to access to data, distribution of data, access to GIS functionality, and visualization of multimedia data. Although access to and dissemination of spatial data over the Web has in recent years been addressed in the literature, little research effort has addressed the issue of access to and processing of GIS analysis functions over the Web. This research explores the potential use of Web-based GIS in improving accessibility to distributed spatial data and spatial modeling tools. A prototype Web-based GIS developed in this study focuses on Web-based location-allocation modeling for spatial decision support, and employs a hybrid approach that uses the Arc/Info software as a GIS server and CGM viewer as a client-side plug-in. This research shows that Web-based GIS is a useful vehicle in conducting spatial modeling in the particular user community. In addition, this study represents the possibility of Web-based GIS in developing open spatial decision supporting systems.