• Journal of the Economic Geographical Society of Korea
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• v.15 no.3
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• pp.390-403
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• 2012

Industrial parks have played a pivotal role in leading and sustaining economic and regional development in Korea. It is conventionally known that industrial parks induce a variety of effects in regional economy from a formation stage to an operational stage. Notwithstanding it is surprising that there is almost no literature on economic effects of the formation and operation of industrial parks. In this paper we attempt to measure economic effects of the formation of industrial parks in Gimhae, Sanmak (Yangsan) and Haman in Gyeongnam. The formation stage of industrial park is divided into a site renovation stage, a firm location stage and an operational stage. This research shows that economic effects of the formation of industrial parks can be different by the characteristics of individual industrial park. Particularly, the main sectors of industry to be located in an industrial park can be to a great extent influential for the effects of the new creation of industrial park on productive inducement and job creation.

• Journal of Korean Society of Forest Science
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• v.99 no.6
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• pp.816-826
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• 2010

The purpose of this study is to investigate the types and processes of corporate philanthropy programs on forestry in Korea 500 largest companies. The result shows that 75 companies of Korea 500 companies (15.0%) participated in corporate philanthropy program related to forestry and there are 113 programs that those companies are proceeding. The types of 108 programs can be divided into 5 parts; 1) volunteer work, 2) creating forests & management, 3) one-time planting work, 4) forest education, 5) training experts & job creation. Among them, volunteer work (55.6%) and creating forests & management (29.6%) showed high proportion. The process of programs depends on their types. The volunteer and one-time planting work were mainly proceeded directly by corporate volunteer organization. But creating forests & management, forest education and training experts & job creation were usually proceeded in consort with local governments, NPOs and NGOs, and so on. These results show that Korean corporate philanthropy in forestry is progressing to strategic philanthropy through participation and partnership of various social groups. This shows the possibility to progress corporate community investment (CCI) with forest education and training experts & job creation.

• Journal of Korean Society for Geospatial Information Science
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• v.20 no.2
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• pp.15-22
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• 2012

The variation in the wind speed with height above ground is called the wind shear profile. In the field of wind resource assessment, analysts typically use one of two mathematical relations to characterize the measured wind shear profile: the logarithmic profile (log law) and the power law profile (power law). The logarithmic law uses the surface roughness as a parameter, and the power law uses the power law exponent as a parameter. The shape of the wind shear profile typically depends on several factors, most notably the roughness of the surrounding terrain and the stability of the atmosphere. Since the atmospheric stability changes with season, time of day, and meteorological conditions, the surface roughness and the power law exponent also tends to change in time. For this study, Using the observed data from Met-mast, located in Pyeongdae, Handong in Jeju. we used the matlab and windograper to calculate roughness length and the law exponents. These calculations are similar to reference the data, but they have different ranges. In the ocean case, each reference data and calculated data was the same, but the crop area is higher than the earlier studies. In addition, the agricultural village is lower than the earlier studies.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.8
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• pp.215-224
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• 2013

An efficient homography estimation method for large sized images is proposed. Estimating an accurate homography is one of the most important parts in image stitching processes. Since hardwares have been advanced, it has been passible to take higher resolution images. However, computational cost for estimating homography has been also increased. Specifically, when too many features exist in the images, it requires lots of computations to estimate a correct homography. Furthermore, there is a high probability of obtaining an incorrect homography. Therefore, we propose a numerical method to extract the appropriate correspondences from several down-scaled images to estimate and compensate the homography numerically for restoring an original homography. Also, if there is an unbalance in color tone between the reference and the target images, we make them balanced by using local information of the overlapped regions. Experimental results show that proposed method is three times faster in 3.2 mega pixel images, five times faster in 8mega pixel images than the conventional approach. Therefore, we believe that the proposed method can be a useful tool to efficiently estimate a homography.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.384-384
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• 2011

전 세계적으로 유역단위 수문해석 모형으로 많이 사용되는 SWAT모형은 유역 내 수문 모의시, DEM을 기반으로 유역 평균경사도를 이용하여 경사도-경사장 관계식 산정 경사장을 유역 내모든 수문학적 반응단위(HRU:Hydrologic Response Unit)에 동일하게 적용하는 문제점이 있다. 특히 SWAT모형은 미국지형 기반으로 개발되었기 때문에 유역 평균 경사도가 25% 미만일 경우 유역 평균 경사장 인자가 매우 작은 값으로 산정되어 모두 동일하게 적용된다. 이는 SWAT모형의 수문 및 지하수 함양량 산정 시 우리나라 유역 특성이 제대로 반영되지 않는 채 모의가 이루어질 수 있는 문제를 초래할 수 있다. 따라서 이러한 문제점을 해결하기 위하여 본 연구에서는 강원 발전연구원에서 전수 조사한 실측 경사장 자료가 있는 강원도 양구군 해안면 만대천 유역을 연구 대상지역으로 선정하였고 지하수 함양량을 시공간적으로 분석 할 수 있게 개발 된 SWAT HRU Mapping module에 실측 경사장 자료를 이용하여 2009년 실측 경사장(274m) 적용과 임의의 경사장(5m) 적용에 따른 유출량 및 지하수 함양량을 비교 분석 하였다. 임의의 경사장을 5m로 선정한 이유는 SWAT모형에서 소유역의 경사도가 25%이상일 경우 소유역의 경사장을 모두 0.05m로 산정하여 모두 동일하게 적용하기 때문에 실측 경사장(평균 274m)과 대조군으로 비교하기 위하여 임의의 경사장을 5m로 선정하였다. 2009년 해안면 만대천 유역의 총 강우량은 1341mm이며 실측경사장 및 임의 경사장 적용에 따른 유출특성별 유출량을 비교해보면 직접유출 결과는 두 가지 경사장 모두 큰 차이를 나타내지 않았지만 평균 경사장이 증가 할수록 중간유출은 줄어들고 기저유출이 급격하게 증가하는 것으로 분석되었다. 또한 2009년 만대천 유역의 월별지하수 함양량은 실측경사장과 임의의 경사장 적용에 따라 각각 591mm/yr(함양율 44%) 와 293mm/yr(함양율 22%) 로 나타났으며, 중간유출이 줄고 기저유출이 증가 할수록 지하수함양량 역시 증가 하는 것으로 나타났다. 따라서 SWAT모형에서 기저유출을 정확히 해석하고 지하수함양량을 제대로 산정하기 위해서는 실측 경사장에 적용에 따른 모형의 검 보정이 반드시 이루어져야 한다고 판단된다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.1B
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• pp.15-30
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• 2000

The important considerations in the design of fiber-optic networks are reliability and survivability preparing against a failure. The SDH(Synchronous Digital Hierarchy), the international standard of optical transmission, offers several network reconfiguration methods that enable network to be automatically restored from failure. One of the methods is the SHR(Self Healing Ring), which is a ring topology system. Most network providers have constructed their backbone networks with SHR architecture since it can provide survivability economically. The network architecture has eventually evolved into a multi-ring network comprised of interconnected rings. This paper addresses multi-ring network design problems is to minimize ring-construction cost. This problem can be formulated with MIP(mixed integer programming) model. However, it is difficult to solve the model within reasonable computing time on a large scale network because the model is NP-complete. Furthermore, in practice we should consider the problem of routing demands on rings to minimize total cost. This routing problem involves multiplex bundling at the intermediate nodes. A family of heuristic algorithms is presented for this problem. These algorithms include gateway selection and routing of inter-ring demands as well as load balancing on single rings. The developed heuristic algorithms are applied to some network provider's regional and long-distance transmission networks. We show an example of ring design and compare it with another ring topology design. Finally, we analysis the effect bundling.

• Korean Journal of Organic Agriculture
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• v.20 no.2
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• pp.185-200
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• 2012

It has been reported that world population continues to increase so that a matter of food security can be a world-wide problem for mankind. An anticipated rise in world population of 30% and the subsequent increased demand for food brings with it challenges in terms of global resource usage and food security. However, ruminant livestock production and consumption make a large contribution to the greenhouse gas (GHG) emissions which can be attributable to food production. Given the association between GHG and climate change, this is clearly of great concern to the livestock industry worldwide. Nevertheless, ruminant livestock also play an important role in global food security as they can convert the plant cell wall materials and non-protein nitrogen compounds, found widely in plants but indigestible to all monogastric animals including man, into high value proteins for human consumption. Much effort has been made to maximize animal production, feed conversion ratio, and to improve animal breeding in ruminant agriculture. In addition improving feed formulation techniques, developing chemical additives, plant extracts, and new plant varieties for grazing have been tested. Future ruminant production systems will need to capitalize on important benefits of ruminants. It is therefore suggested that ruminant agriculture has a key role to play in maintaining and enhancing provision of quality proteins and essential nutrients for human being but the challenge of reducing GHG emissions, and methane in particular, needs to be successfully addressed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.4
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• pp.231-242
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• 2016

The purpose of this study is to analyze the effects empowerment has on a lifelong educator's job satisfaction and organizational commitment. This study was implemented to amass and analyze the data from 160 Daejeon district's lifelong educators using SPSS 20.0. The statistical analysis was conducted with the following measures: frequency analysis for demographic characteristics, descriptive analysis, factor analysis with Varimax rotation for the validity of the measured variables, Cronbach's alpha coefficient for the reliability of the internal consistency between the variables, and Pearson's correlation coefficient to confirm the relevance between the variables. Our hypothesis was then verified through regression analysis. Our research results showed that, first, the level of empowerment differed depending on such factors as gender, age, education level, employee type, work hours, and monthly income. Second, empowerment was shown to have a significant influence on job satisfaction, where higher empowerment levels led to higher job satisfaction. Third, empowerment was a significant factor in increasing organizational commitment, as higher empowerment levels led to higher commitment. Therefore, this study reflected on the concept that empowerment was needed by lifelong educators, thus showing that enhancing job satisfaction and organizational commitment by developing the personal abilities of a lifelong institution educator is favorable to the institution's development and success.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.232-239
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• 2001

Young Jong Grand Bridge is approach traffic road of New Inchon International Airport which covers hub airport function in northeast asia. The total span length of this bridge is $4,420{\cal}m$ and this main bridge type is, the first in the world, Double Deck Self Anchored Suspension Bridge, designed as double deck systems to be arranged by road and railroad. Approach bridges to be connected with main span also are composed double deck steel truss and steel box girder to consider a continuity with this span. Our company erected $1,375{\cal}m$(about 60,000tons) of double deck steel truss bridge type which is composed by 6 traffic lane on upper deck and 4 traffic lane and Double track railroad on lower deck. The original installation method of this bridge was planed to install about 75 meters bridge blocks to use floating crane, after temporary bent was constructed between permanent piers. But this method which had to construct many temporary bents in the sea had the matter that construction periods can become lengthen and construction cost can be risen. To overcome the uncertainty to ensure high qualify of bridge and economic project execution, our company developed new bridge erection method to assure both quality control and economic construction work. The new erection method which was developed by us was one that could transport and install long bridge block, $120{\cal}m$ unit at a time and that temporary bent was not required. We hope that this paper is used as technical data which will erect bridge in the western sea and others marine region.

• Journal of Venture Innovation
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• v.2 no.1
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• pp.57-79
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• 2019

We have been experiencing an lengthened life expectancy due to rapid industrialization, economic and medical development. In particular, the elderly population was only 5.1% of the total population in 1900s when the senior centers were established, but 30 years later, the elderly population aged 65 or older reached 6.54 million in 2015 and became 14% in 2017. There is a very meaningful correlation between service quality of the senior welfare center and the life satisfaction of the elderly, where the elderly spend their leisure time on a daily basis. Accordingly, this study tried to identify the desirable conditions that the elderly think and the difference from the desired status and the actual status to identify what information and services should be provided by senior welfare centers. Gwanak Senior Welfare Center has provided senior welfare service for local seniors for 30 years since its establishment and contributed to silver welfare policy establishment based on the accumulated experiences. In the coming era of GDP 30,000 dollars, National Pension era and average life span 100 years, the new creative silver welfare programs should be introduced such as qualitative programs rather than quantitative, programs for caring minorities, complimentary or actual expense programs, creative programs rather than passive ones, and diversity of the subjects. This study would like to present the future direction for the next 30 years.