• Journal of Power Electronics
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• v.2 no.1
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• pp.11-18
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• 2002

The development of the solar and the wind energy is necessary since the future alternative energies that have no pollution and no limitation are restricted. Currently MW Class power generation system has been developed, but it still has a few faults with the weather condition. In order to solve these existing problems, combined generation system of photovoltaic and wind power was suggested. It combines wind power energy and solar energy to have the supporting effect from each other. However, since even combined generation system cannot always generate stable output with everchanging weather condition, power storage apparatus that uses elastic energy of spiral spring to combined generation system was also added for the present study.

• Journal of the Korean association of regional geographers
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• v.7 no.4
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• pp.81-92
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• 2001

Main debates in the modern geographical thoughts had been developed around the regional geography. Because regional geography had been regarded as a raison d'etre of geography, it remains solid status in geography curriculum. But unscientific nature of regional geography was the main problem of modern geography. Modern geography has developed the logical legitimation of regional geography, instead of research procedures. We examine the logic of modern geographical thoughts from 3 worldview. Here we represented the part - the whole relationship as the primary category, and classify these into three type according to the implicit proposition about the relationship. One is the organic view, which assume that the whole is greater than the sum of the parts. This view was the primary proposition held by the modem geographers. This view regarded the region as organic complex, and presume the unit region which is irreducible to the elements. The other is mechanic view, which presuppose that the whole is the sum of the parts. This view comprehend region by means of spatial order, in order to simplify the complex reality. Then we compare real condition with assumption. These two view held static assumption. Now, the third view regarded the part- the whole relationship as being dynamic. Most geographers held the organic view, although someone suggests the idea of harmony, the others suggests the idea of complex. But these view presumes the pre-industrial society in which the genre de vie was main principle of social order. Therefore It could not comprehend the regional concept in the context of the urbanization and industrialization.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39C no.9
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• pp.767-773
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• 2014

An economic ship routing means to sail a ship with a goal of minimizing the fuel consumption by utilizing weather forecast information, and there have been various systems which have been recently studied. For a successful economic ship routing system, it is needed to properly control an engine power or change a geographical path considering weather forecast. An optimal geographical path is difficult to be determined, though, because it is a minimal dynamic-cost path search problem where the actual fuel consumption is dynamically variable by the weather condition when the ship will pass the area. In this paper, we propose an geographical path-search algorithm based on evolutionary strategy to efficiently search a good quality solution out of tremendous candidate solutions. We tested our approach with the shortest path-based sailing method over seven testing routes and observed that the former reduced the estimated fuel consumption than the latter by 1.82% on average and the maximum 2.49% with little difference of estimated time of arrival. In particular, we observed that our method can find a path to avoid bad weather through a case analysis.

• Journal of Korean Society of Forest Science
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• v.99 no.6
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• pp.863-870
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• 2010

We investigated geographical condition and soil characteristic of ginseng cultivation site. At all sites, crown density adjusted by 80%. and Air and soil temperature were also measured. The geographical condition vary ato all sites. and soil shows similar characteristics with typical forest soil of Korea. The results shows the Air temperature needs to be higher than $15^{\circ}C$ for seed budding at April When soil temperature reach at 8, leaf of foest ginseng starts to bud. A forest ginseng is influenced by forest type, planting type and budding rates. In the case of a seedling planting, an seeding emergence rate is high, but the rate is decreased rapidly after three years On the other hand, direct seeding shows lower seedling emergence rate, but survival rate is higher than seedling-planting.

• Journal of the Economic Geographical Society of Korea
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• v.7 no.2
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• pp.137-156
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• 2004

This paper investigates the current situation of the Gyeonggi border region, which demonstrates the distorted political and economic realities of Korea, in order to gain the basic information that enables the comprehensive understanding of the Gyeonggi border region. This study has found that the 'Law for Protection of Military Facilities' has limited residents' life and economic activities in the region. And, the 'Law for Planning of the Capital Region' has also became another barrier to development of the region. Finally, the analysis of the region's economic condition showed that these regulations have made the Gyeonggi border region a backward periphery.

• Journal of the Economic Geographical Society of Korea
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• v.11 no.3
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• pp.476-491
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• 2008

In the era of globalization, the number of international students are rapidly increasing. Korea is no exception. For a long time Korea has been one of the major countries in terms of students' outward migration at university-level, but recently the inward migration is also increasing so as to change the situation. First, this paper deals with theoretical aspects of international students' flows and reviews recent research achievements on those. Second, the paper describes the overall condition of international students in Korea using statistical data. Finally, this paper examines characteristics and backgrounds of international students in Korea.

• Journal of the Economic Geographical Society of Korea
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• v.7 no.2
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• pp.203-225
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• 2004

The purpose of this paper analyzes the characteristics of economic space in Gyeonggi border regions. Especially, this study focuses on understanding the environment enveloped the enterprises because today, largely influenced factor for regional economic development is enterprises. Since 1990's the change of the spacial organization in Korean Capital region has been inducing the functional transformation in Gyeonggi border regions so that new function -beyond military functions- is developed in these regions. By the disindustrialization in core region contributed to the industrialization in periphery, border regions are developed as a concentrated space of traditional industries and small size manufactural firms. The most important pull factor is facility for obtain a factory site and favorable condition of land price. Globally, the reasons to locate enterprise in these regions are found not in positive and progressive strategies but in passive and defensive strategies. Therefore few enterprise carried about influences of economic cooperation between North and South Korea at the moment of decision of their site. The survey reveal that enterprises didn't highly estimate the environment in border regions as their business activities. The first dissatisfied condition is insufficiency of labour and difficulty of access for administrative and high level services, due to geographical separation. Considering the recent tendency of spacial reorganization in Capital region is not always good for border regions, border regions have to employ a policy with the object of ameliorating regional business environments and growing up a potentiality of endogenous development.

• Journal of Korean Society for Atmospheric Environment
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• v.22 no.6
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• pp.888-903
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• 2006

This study analyze the change of wind pattern and intensity according to the transform of surface conditions, such as land use and height of terrain, over the leeward region. In order to do this, we have employed 'Envi-met' microscale atmospheric numerical model. When the same wind condition is considered, the wind speed of base case having natural surface condition of Chunsudae shows the weakest strength among different cases such as the 'bare case' and the '20 m case' which the plants is removed and the height of terrain is flatted as 20 m above the sea level over the Chunsudae, respectively. The weakening of wind speed is a maximum of $4{\sim}8 m/s$ when the inflow wind speed is 55 m/s.

• Journal of the Korean Institute of Rural Architecture
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• v.17 no.2
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• pp.17-26
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• 2015

In this study the location condition and the management of the Rural Experience Tourism Villages located around unified Cheongju city has been surveyed or investigated. On the basis of the results of the survey or investigation this study is to suggest a way to make activate the Rural Experience Tourism Villages which have been inactive. The ways of the research include the understanding of what means the activation of rural areas and then this study is to find the problems with the Rural Experience Tourism Villages and to suggest final ways or plans after the field investigation of the condition of the location and management of the Villages. In this study I had full understanding of the concept of the activation for rural areas and the humanistic and geographical characteristics and then made a wide investigation and analysis of the location condition and the management of the Rural Experience Tourism Villages in this area. Based on the theory and the results of the actual investigation I made a suggestion of basic direction for the improvement of the Villages and the ways for activation of the Villages. I really expect these suggestions of mine to make active contribution to make the actual plan through the promotion of the Rural Experience Tourism Villages.

• Journal of the Korean Geographical Society
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• v.43 no.5
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• pp.715-727
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• 2008

This study analyzed changes on the best condition of temperature and relative humidity for making artificial snows in the Yongpyong Ski Resort using data from Daegwallyeong. Depth of snowfall and snowfall days have decrease since 1990s. If the Yongpyong Ski Resort has only to depend on natural snows, it would be difficult to make and maintain ski slope. There are two times of snowmaking during ski seasons: one is the first snowmaking (October-November) for opening ski slopes and the other is the reinforcement of snowmaking (December-March) for maintaining snow quality during the seasons. Days having the best condition for the first snowmaking (daily minimum temperature below $-1^{\circ}C$ and daily average relative humidity 60 to 80 percent) decreased after 1970s. Days having the best condition for the reinforcement of snowmaking also decreased. While temperature changes are more evident than humidity changes for the first snowmaking, humidity changes are more obvious than change of temperature for the reinforcement of snowmaking. In the future climate projection by A1B scenarios, the length of ski seasons projected to decrease a 10 to 40 percent against the period of 1973-2008. The climate condition for the snowmaking projected to be poor, especially the due to increase of temperature.