• Journal of the Korean association of regional geographers
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• v.5 no.1
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• pp.77-90
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• 1999

This paper aims to understand the changing characteristics of the Kumi region as a locality in Korea through the regional geography of the world-system approach. To illustrate the changing regional characteristics, we analyzed the economic characteristics or position of the Kumi region within the world-economy and its spatial structure with three divisions of Korean capitalist periods: the Japanese colonial period ($1910{\sim}1945$), the social chaos period ($1945{\sim}1960$), and the economic development period ($1960{\sim}$present). In the Japanese colonial and social chaos periods, as Korean society was incorporated into the peripheral zone within the world-System (world-economy), Kumi also was made into a peripheral agricultural area. As a result, the Kumi region shaped the rural spatial structure without an urban center or regional dominant center. In the development period, influenced by the manufacturing-centered economic policy which boosted Korea as a semi-periphery within world-economy, Kumi also was developed into an industrial region(or semi-periphery) with the establishment of the Kumi electronic and textile industrial complex. This industrialization transformed the rural spatial structure of Kumi into a core (urban center)-periphery (rural area) structure. As we identified above, the regional geography of the world-system approach turned out to be a useful methodology to study a locality or internal region. Therefore we should make efforts to study such regions through the regional geography of the world-system approach.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.17 no.1
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• pp.76-81
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• 2024

Recently, agricultural methods are changing from experience-based agriculture to data-based agriculture. Changes in agricultural production due to the 4th Industrial Revolution are largely occurring in three areas: smart sensing and monitoring, smart analysis and planning, and smart control. In order to realize open-field smart agriculture, information on the physical and chemical properties of soil is essential. Conventional physicochemical measurements are conducted in a laboratory after collecting samples, which consumes a lot of cost, labor, and time, so they are quickly measured in the field. Measurement technology that can do this is urgently needed. In addition, a soil analysis system that can be carried and moved by the measurer and used in Korea's rice fields, fields, and facility houses is needed. To solve this problem, our goal is to develop and commercialize software that can collect soil samples and analyze the information. In this study, basic soil composition measurement was conducted using soil composition measurement sensors consisting of hardness measurement and electrode sensors. Through future research, we plan to develop a system that applies soil sampling using a CCD camera, ultrasonic sensor, and sampler. Therefore, we implemented a sensor and soil analysis UI that can measure and analyze the soil condition in real time, such as hardness measurement display using a load cell and moisture, PH, and EC measurement display using conductivity.

• Korean Journal of Breeding Science
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• v.43 no.6
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• pp.620-624
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• 2011

'Hwaweon 4' was developed from a cross between the African upland cultivar, 'Moroberekan' and 'Ilpumbyeo' based on marker-aided backcross selection. The recurrent parent 'Ilpumbyeo' is a high grain quality cultivar with medium to late maturity. 'Hwaweon 4' is nearly isogenic to 'Ilpumbyeo' except a small Moroberekan introgressed segment on chromosome 4 harboring the resistance gene for blast. The preliminary and replicated yield trial was conducted at Chungnam National University in 2006 and 2007. The local adaptability test was carried out by the National Seed Management Office (NSMO) from 2008 to 2009. This cultivar was registered to NSMO with a cultivar designated as 'Hwaweon 4'. This cultivar averaged 76 cm in culm length and has medium growth duration. Milled rice of 'Hwaweon 4' is translucent and the grain quality traits are comparable to those of the recurrent parent. It has low protein content. The yield potential of 'Hwaweon 4' in grain was about 6.31 MT/ha at the ordinary fertilizer level for two years. This variety showed highly resistance reaction at the blast nursery test at four locations and also at the sequential planting method. This resistance is due to the resistance gene designated as Pi45(t) on chromosome 4 introgressed from the donor parent, 'Moroberekan'. The Pi45(t) gene would be useful inenhancing resistance to blast in rice breeding program.

• Journal of Internet of Things and Convergence
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• v.8 no.2
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• pp.35-40
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• 2022

In the agricultural environment, pesticide control requires a high risk of work and a high labor force for farmers. The effectiveness of pesticide control using unmanned aerial vehicles varies according to climate, land type, and characteristics of unmanned aerial vehicles. Therefore, an effective method for pesticide control by unmanned aerial vehicles considering the spraying conditions and environmental conditions is required. In this paper, we propose an efficient pesticide control system based on agricultural unmanned aerial vehicles considering the application conditions and environmental information for each crop. The effectiveness of the proposed model was demonstrated by measuring the drop uniformity of pesticides according to the change in altitude and speed after attaching the sensory paper and measuring the penetration rate of the drug inside the canopy according to the change in crop growth conditions. Experiment result, the closer the height of the UAV is to the ground, the more evenly the crops are sprayed, but for safety reasons, 2m more is suitable, and on average a speed of 2m/s is most suitable for control. The proposed control system is expected to help develop intelligent services based on the use of various unmanned aerial vehicles in agricultural environments.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2021.04a
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• pp.25-25
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• 2021

전 세계에 유통되고 있는 Cypripedium속 식물 56종 중 한반도에는 4종이 분포하고 있다. 국내의 Cypripedium속 식물 중 멸종위기 1급 식물은 광릉요강꽃과 털복주머니란이 있으며, 복주머니란은 멸종 위기 2급 식물로 분류하였다. 본 연구는 이러한 복주머니란 식물의 육묘기술을 개발하기 위하여 연구를 수행하였다. 처리는 원예용 상토, 마사토 100%, 질석 2 : 펄라이트 1의 비율로 혼합한 인공토양, 산야초 상토, 소립인 난석 등 5처리를 하여 복주머니를 스티로폼 박스(가로 40, 세로 50, 높이 15cm)에 식재하여 4개월 경과 후 조사한 결과 산야초 상토에서 출아율이 67.0%로 가장 많았으며, 질석 2 + 펄라이트 1의 처리구가 53.0%, 소립인 난석 처리구가 48.0%순으로 높았다. 출아율이 가장 좋았던 산야초 상토의 경우 초장은 3.0cm, 엽수는 주당 1.9개, 엽폭은 1.0cm로 다른 처리구보다 생육이 양호하였다. 또한 털복주머니란 실생묘를 노지에서 1년 동안 순화한 묘를 자생지 외 지역의 적응성을 확인하기 위해 경기도 양평에 위치한 국립수목원 내 Cypripedium 전문 전시원에 660주를 봄에 식재하였다. 그해 9월에 생존율 을 조사한 결과 52.5% 이었고, 초장이 5.8cm, 뿌리수는 주 당 3.6개, 뿌리길이는 6.4cm 등 생육도 정상적으로 진행되는 것으로 조사되었다. 이와같은 연구를 바탕으로 멸종위기종인 복주머니란의 적정 환경 조성과 육묘기술 및 현지 적응성을 향상시킨다면 멀지 않은 시기에 복주머니란의 복원 사업은 성공적으로 마무리될 것으로 판단된다..

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.114-114
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• 2019

최근 들어 집중호우 및 토지이용 변화로 인한 고탁수 문제가 빈번히 발생하고 있다. 이러한 탁수 및 수질오염 문제를 해결하기 위해 환경부는 비점오염원 관리지역을 선정하였으며, Best Management Pratices(BMPs), Low Impact Development(LID) 등 다양한 저감 대책을 시행하고 있다. 비점오염원의 발생원인과 발생위치를 정확하게 증명할 수 없으므로 유역 내 수문 및 수질을 모의할 수 있는 Soil and Water Assessment Tool(SWAT) 모델이 다양한 비점오염원 연구에 널리 활용되고 있다. 그러나 SWAT 모델은 Hydrologic Response Unit(HRU)의 경사도와 경사장을 산정할 때 소유역 내 평균 경사도를 이용하여 토양유실량 및 유출특성을 모의에 필요한 매개변수들을 산정한다는 한계점이 있다. 본 연구에서는 이러한 SWAT 모형의 단점을 보완하기 위하여 실제 경작지를 기준으로 HRU를 생성하고, 실측 경사도와 경사장을 적용하기 위한 기술을 개발하였다. 본 연구에서 개발한 기술을 고탁수로 인해 비점오염원 관리지역으로 지정된 도암호 유역에 적용하여 실측 경사도와 경사장을 적용하여 모의한 유출량과 기존의 SWAT 모델을 통해 모의한 유출량을 비교 분석하였다. 기존 모델의 결과와 본 연구에서 개발한 기술을 적용하여 모의한 결과를 비교하였을 때 수문 컴포넌트 중 중간유출과 기저유출에 있어서 차이가 발생한 것을 알 수 있었다. 또한 본 연구에서 개발된 기술을 적용함으로써 도암호 유역에서 비교적 정확한 토양유실과 Suspended Solids(SS) 모의 결과를 나타냈다. 하지만 본 연구는 도암호 유역만을 대상으로 수행되었기 때문에 다른 비점오염 관리지역에 확대 적용하여 본 연구의 결과를 재검토할 필요가 있다.

• Korean Journal of Breeding Science
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• v.41 no.4
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• pp.529-533
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• 2009

A new spray chrysanthemum (Dendranthema grandiflorum) cultivar "Green Witch" was developed from a cross between 'S04161' and 'S04109' by selection of seedlings and lines at the Flower Research Institute, Gyeongnam Agricultural Research and Extension Services (ARES) from 2004 to 2008. Its characteristics were investigated three times from 2006 to 2008 under condition of forcing culture in spring and retarding culture in autumn. The natural flowering time of "Green Witch" was October 19th, and year-round production was possible by day length treatment. Its capitulum was 3.2cm in diameter, and had 15.9 head per stem in autumn. Its ray floret was green central zone. To flower in the short day condition, for "Green Witch" was about 44 days in spring, and "Green Witch" showed the vase life of 25.3 days in autumn. This cultivar was registered for a commercialization in 2008.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.16 no.6
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• pp.249-267
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• 2021

The use of big data accumulated along with the progress of digitalization is bringing disruptive innovation to the global agricultural industry. Recently, the government is establishing an agricultural big data platform and a support organization. However, in the domestic agricultural industry, the use of big data is insufficient except for some companies in the field of cultivation and growth. In this context, this study identifies factors affecting the intention to use big data in terms of technology, organization and environment, and also confirm the moderating effect of technical field, focusing on agricultural ventures which should be the main entities in creating innovation by using big data. Research data was obtained from 309 agricultural ventures supported by the A+ Center of FACT(Foundation of AgTech Commercialization and Transfer), and was analyzed using IBM SPSS 22.0. As a result, Among technical factors, relative advantage and compatibility were found to have a significant positive (+) effect. Among organizational factors, it was found that management support had a positive (+) effect and cost had a negative (-) effect. Among environmental factors, policy support were found to have a positive (+) effect. As a result of the verification of the moderating effect of technology field, it was found that firms other than cultivation had a moderating effect that alleviated the relationship between all variables other than relative advantage, compatibility, and competitor pressure and the intention to use big data. These results suggest the following implications. First, it is necessary to select a core business that will provide opportunities to generate new profits and improve operational efficiency to agricultural ventures through the use of big data, and to increase collaboration opportunities through policy. Second, it is necessary to provide a big data analysis solution that can overcome the difficulties of analysis due to the characteristics of the agricultural industry. Third, in small organizations such as agricultural ventures, the will of the top management to reorganize the organizational culture should be preceded by a high level of understanding on the use of big data. Fourth, it is important to discover and promote successful cases that can be benchmarked at the level of SMEs and venture companies. Fifth, it will be more effective to divide the priorities of core business and support business by agricultural venture technology sector. Finally, the limitations of this study and follow-up research tasks are presented.

• Journal of agriculture & life science
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• v.46 no.6
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• pp.147-156
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• 2012

This study evaluated the effects of presoaking apple slices in 2 or 5% brine solution prior to air-drying at $50^{\circ}C$. Several quality factors of the dried apples were measured including moisture content (MC), water activity ($a_w$), shear force, color values, appearance and consumer likability. Except at time 0, the $a_w$ of presoaked samples was lower than those of control during and after drying. The relationship between MC and water activity during drying was well-fit by an exponential model. During drying, the moisture contents of presoaked samples were slightly higher than control samples with no presoaking. However, the $a_w$ of presoaked slices were lower than control at a given drying time. At a given $a_w$, presoaked slices had higher moisture content. The shear force was lower for samples presoaked in brine solution, particularly at shorter drying times. Presoaked apple slices also were lighter in color after drying than controls. Sensory evaluations suggest that presoaking of apple slices before drying may help enhance palatability. Samples presoaked in 2% brine solution had the highest scores for taste, texture and overallacceptability, while those presoaked in 5% brine solution had the highest scores for appearance.

• Journal of Practical Agriculture & Fisheries Research
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• v.3 no.1
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• pp.48-69
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• 2001

A lot of clones of the genus Dioscorea have been introduced from some tropical and subtropical regions since 1997. In 33 clones of water yams (Dioscorea alata L.), some morphological characteristics were investigated at the field. Variation ranges of the total weight and tuber number per stump were within the ranges from 90 to 2,147 g with an average of 610 g ; and 1.3-4.7 with an average of 2.8, respectively. The color tones observed on the tuber-flesh were sorted into 3 color-categories, i.e., white, pale brown and pale purple, and those on leaves were sorted into 3 color-categories, i.e., green, heavy green and purplish green. Intraspecific genetic relationship of 19 variation types of the Yam classified by their external morphological characteristics such as leaf and tuber shape was assessed by DNA using random and specific primers. Twenty two out of 113 primers (100 random[10-mer] primers, two 15 mer [M13 core sequence, and (GGAT)4 sequence]) had been used in PCR-amplification. Only 12 primers, however, were successful in DNA amplification in all of the analyzed plants, resulting in 93 randomly and specifically amplified DNA fragments. The analyzed taxa showed very high polymorphisms(69 bands, 71.0%), allowing individual taxon to be identified based on DNA fingerprinting. Monomorphic bands among total amplified DNA bands of each primer was low under the 50%. Similarity indices between accessions were computed from PCR(polymerase chain reaction) data, and genetic relationships among intraspecific variations were closely related at the levels ranging from 0.66 to 0.90.