• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.24 no.2
• /
• pp.167-173
• /
• 2006

Ionosphere is the largest error source on propagation of GPS signals. Dual frequency (L1,L2) GPS receiver can be effectively able to eliminate the ionosphere error by using linear combination of two frequencies, but the single frequency receiver (L1) have to compute the ionosphere error. In this research, we developed the new ionospheric model with $1^{\circ}$ by $1^{\circ}$ spatial resolution based on the grid from using 9 GPS reference stations which have been operated by KASI (Korea Astronomy and Space Science Institute) and computed TEC (Total Electron Contents) over South Korea by epoch. This paper gives the positioning results of Klobuchar model with that of a newly developed KASI regional ionospheric model and shows the positioning precision of the KASI regional ionospheric model along with TEC variation of ionosphere.

• Journal of the Korean Regional Science Association
• /
• v.36 no.3
• /
• pp.17-27
• /
• 2020

Baby boomers are the population group born between 1955 and 1974 in South Korea. They are the generation to grow up in the rural areas and it has been reported in the previous literature that a large part of baby boomers now hopes to return their hometowns after their retirement. The purpose of this study is to investigate factors that obstruct the baby boomers' residential relocation to their hometowns by in-depth interviews with three different types of baby boomers: returners, soon-to-be returner, and wanna-be returner. Findings of this study show that the reasons behind the hesitation to the migration may be grouped into four categories: concerns about insufficient jobs, lack of medical services, concerns about social relation network and poor cultural environment in their hometown.

• Journal of the Korean Regional Science Association
• /
• v.12 no.2
• /
• pp.99-116
• /
• 1996

This study investigates the nature and patterns of interrelation between the emerging information and communication technology(ICT) and the organization of corporate space, both theoretically and empirically. In this work, ICT is conceptualized not so much a space-adjusting technology as an organizational technology. ICT is considered as a governance technology which is related to coordination function within a firm. Therefore, it is supposed to have a great relevance to the spatial reorganization of functions within a firm. Both questionnaire and case study method are used to gather necessary data from Korean electronics manufactures. The results of this study can be summarized as follow. First, the spatial structure of a firm, which is operationalised as the number and type of spatially separated establishments, is turned out to have a great explanatory power to its adoption of computer networks. Computer networks in muli-locational companies are introduced to overcome the limits of its spatial structure, such as duplication of functions, such as duplication of functions, loss of time spent in proceeding a job between different functional units, and unresponsiveness to the change of market demand. Second, new spatial division of labor and function could be possible through a series of business process reengineering, not through the mere adoption of ICT. Case studies reveal that computer network could help a firm to realize new forms of spatial division of labor, especially in those functions which is mainly based on the flow of information. Such function as ICT management, sales logistics and after-sales service are major parts where a new operational unit has appeared with the help of ICT. From above results, it can be concluded that the interrelations between ICT and organizational space should be approached intimately integrated with the change of industrial structure and it's organizational implications.

• Journal of the Korean association of regional geographers
• /
• v.11 no.6
• /
• pp.640-656
• /
• 2005

A chronic depression in the Korean economy, which depends mostly on imported oil, has been attributed partly to rising crude oil prices recently. Against the backdrop of these realities in Korea, Azerbaijan in the Caspian region, with vast oil and gas deposits, has been greeted enviously by some Koreans. Many transition economies, especially on the Caspian region trumpeted by the oil boom, however, are rich in natural resources, but the benefits of those resources are appropriated by the local elite in collusion with foreign companies. Azerbaijan, in particular, is dominated by a series of internal and external patronage networks. Foreign capital nourishes those networks surrounding President Aliev. Thus, the case of Azerbaijan shows that resource rents in the transition economies sometimes do not help in improving the living conditions of ordinary people. Rather rich resource rents turn out to be a major impediment to the emerging development of the transition economy, lessening the incentives to reform in the country. The result was the possibility of the so-called Dutch Disease, in which disproportionate growth in a certain energy sector tends to crowd out investment in other sectors of the economy.

• Journal of the Korean association of regional geographers
• /
• v.21 no.2
• /
• pp.242-258
• /
• 2015

This study discusses spatial distribution of the silver towns in the Seoul metropolitan area and investigates how the residents recognize their silver towns through in-depth interviews. Nowadays there are many elders who prefer to live in urban downtown or suburb areas which can be connected with the places of their pre-retirement lives. Therefore, the silver towns in the Seoul metropolitan area have been increasing. The facilities are mainly located in northern part of Seoul and southern part of Gyeonggi province near the network of major express roads. Location and accessibility are more important than any other factors when the elderly contemplate moving into silver town. Silver town residents are likely to have meaningful times and positive identities by communicating with friends there. The elders aged 80 years or older living in silver towns think the silver towns as their home while 'young old' people complain their limited rights of decision making and they consider additional move.

• Journal of the Korea Society of Computer and Information
• /
• v.12 no.5
• /
• pp.139-144
• /
• 2007

The mobile terminal's frequent changes to the access point introduce significant network overhead in mobile IP networks. To solve this problem, we introduce a hierarchical structure with consideration given to the dynamic value of neighbor scope in IP regional registration[1]. When a mobile terminal moves within the neighbor given by the scope value, it makes registration locally without registration with its home agent. We analyze the algorithm mathematically and show the numerical results. As a result, optimization of the scope value for the localized registration under the hierarchical structure makes the proposed scheme outperform the standard mobile IP protocol[2]. This can be explained from the fact that there is only local registration for terminal's movement within the scope region. Moreover, as the signaling cost for home agent increases, the proposed scheme becomes more advantageous.

• Journal of Digital Convergence
• /
• v.9 no.3
• /
• pp.133-144
• /
• 2011

The purpose of this study are as follows. First, to analyze relative LQ index of the No. of game company, the No. of employee and the amount of revenue. Second, to analyze personal competence, resource competence, performance competence, network competence and environmental competence of regional game contents R&D. The results are as follows. The LQ index results of company are highest in seoul and Kyunggi area' And In case of except of seoul & kyunggi, the competence of R&D which is daekyung, dongnam, chungcheong are in order. In case of 5 game R&D competence, chungchung, seoul & kyunggi, honam region are in order. The core competence of chungchung region are ideal venture ecosystem among inter-supportive R&D research center, ETRI, university and company.

• Journal of the Korean association of regional geographers
• /
• v.4 no.2
• /
• pp.65-77
• /
• 1998

One of the fundamental, important preconditions for effective teaching of geography is to collect a variety of picture data available for class and to manage the data systematically. The purpose of this study is to present one method about how to supply basic picture data available for class of Korean geography for the high school program to teachers in service and how to collect, manage and utilize the data. A total of 233 picture data related to contents of the textbook of Korean Geography have been gathered through this study, and a database has been constructed for the data. Directories were generated for individual units of the textbook, and the collected picture data was stored in the image file of each directory. This data was recorded in a CD and attached as an appendix. Since the primary purpose of this study is to suggest one method, the picture data in a database for the present study is just a fraction of lots of data available for class of Korean geography. If the user persistently enlarges and manages data based on the results of this study, the data will become a good instructional aid. The picture data can be printed over the transparent film and used for class by using the overhead protector (OHP), or it can be also used as a remote self-study tool through the computer telecommunications network (e.g., LAN or INTERNET. etc,). Most desirable, however, is to develop teachers' own method by taking account of separate units of the textbook or diverse educational environments.

• Journal of the Korean association of regional geographers
• /
• v.4 no.2
• /
• pp.139-150
• /
• 1998

Recently in connection with the development of network technology, GIS researches shift their focuses to openGIS which enables to share heterogeneous geodata and geoprocessing resource under the environment of LAN and WAN. This study proposes an easy method to develope GUIs which enables openGIS in the intranet environment. In the developing stage of GUI, the most important thing is to develop effective windows programming technique and apply a internet linking technique to developed GUIs. This study shows an internet linking technique and a GUI developing method using OLE automation and ActiveX/COM standards. Using a case study of Taegu City Library, the study constructs a GIS database and develops its GUI which performs map overlaying, referencing attribute tables, drawing up of thematic map, buffer analysis, and statistical calculations. This study remains same further research areas of developing a new advanced technique for openGIS and its GUI using distributed object model of CORBA, Java language, and JDBC data accessing technique.

• Journal of the Korean association of regional geographers
• /
• v.15 no.5
• /
• pp.616-634
• /
• 2009

Criticizing the existing social science approaches to transnational migration for their ignorance of spatial perspectives and the resultant limits in the understanding of the concrete processes of international migration and settlement, this paper aims to examine how spatial perspectives and geographical epistemology can positively contribute to the understanding and conceptualization of transnational migration. In particular, it emphasizes that the processes of transnational migration cannot be solely understood in terms of 1) global capitalist restructuring and economic rationality, 2) the impacts of deterritoralized transnational networks, or 3) the operation of immigration regimes constructed at the national scale. Alternatively, this paper argues that the conceptualization of 'transnational space', which is based on the understanding of the socio-spatial dimensions - that is, place, territory, scale and networks - that affect the processes of transnational migration, could significantly contribute to the understanding of the transnational migration.