• Journal of Agricultural Extension & Community Development
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• v.27 no.4
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• pp.199-210
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• 2020

This study aims to find out the differences of community satisfaction between rural and urban residents and identify factors influence community satisfaction. The secondary data designed and surveyed by Rural Development Administration in 2018 were used in this study. The total respondents were 3,929; rural 2,780 and urban 1,149 respectively. The major findings were as follows; First, the level of community satisfaction showed satisfactory in both region, however, level of urban residents were more high than rural. Secondly, perceive safety factor(4 variables) was the most influential in both area. The variances explained were 5.2% in rural and 10.5% in urban.

• Journal of radiological science and technology
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• v.27 no.3
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• pp.19-24
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• 2004

MRI imaging is one of the imaging techniques showing anatomical structures of human body for medical diagnosis, and has been researched in order to provide better quality of anatomical information. In this study, we propose a very useful method to extract an interest areas and how to diagnose necrolysis of femoral neck disease automatically. Regions of femoral neck is set using anatomical features and Hough transform and advantages of both region extension and histogram-based region segmentation method are combined for better region segmentation. As a result of the proposed method, good imaging quality was obtained for femoral neck with both normal and severe necrosis as well as for femoral neck in early stage of necrolysis.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.248-248
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• 2010

CMOS 축소화가 32nm node를 넘어서 지속적으로 진행되기 위하여 FinFET, Surround Gate and Tri-Gate와 같은 Fully Depleted 3-Dimensional 소자들이 SCE를 다루기 위해서 많이 제안되어 왔다. 하지만 소자의 축소화를 진행함에 있어서 좁고 균일한 patterning을 형성하는 것과 동시에 낮은 Extension Region과 Contact Region에서의 Series Resistance을 제공하여야 하고 Source/Drain Contact Formation을 확보하여야 한다. 그리고 소자의 축소화가 진행됨으로써 Silicide의 응집현상과 Source/Drain Junction의 누설전류에 대한 허용범위가 점점 엄격해지고 있다. ITRS 2005에 따르면 32nm CMOS에서는 Contact Resistivity가 대략 $2{\times}10-8{\Omega}cm2$이 요구되고 있다. 또한 Three Dimensional 소자에서는 Fin Corner Effect가 Channel Region뿐만 아니라 S/D Region에서도 중대한 영향을 미치게 된다. 따라서 본 논문에서 제시하는 Novel S/D Contact Formation 기술을 이용하여 Self-Aligned Dual/Single Metal Contact을 이루어Patterning에 대한 문제점 해결과 축소화에 따라 증가하는 Contact Resistivity 문제점을 해결책을 제시하고자 한다. 이를 검증하기3D MOSFET제작하고 본 기술을 적용하고 검증한다. 또한 Normal Doping 구조를 가진3D MOSFET뿐만 아니라 SCE를 해결하기 위해서 대안으로 제시되고 있는 SB-MOSFET을 3D 구조로 제작하고, 이 기술을 적용하여 검증한다. 그리고 Silvaco simulation tool을 이용하여 S/D에 Metal이 Contact을 이루는 구조가 Double type과 Triple type에 따라 Contact Resistivity에 미치는 영향을 미리 확인하였고 이를 실험으로 검증하여 소자의 축소화에 따라 대두되는 문제점들의 해결책을 제시하고자 한다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.66 no.3
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• pp.210-219
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• 2021

In recent years, air temperature has been increasing rapidly compared to the 1980s because of global warming. This increase in temperature reduces the yield and quality of rice; therefore, measures are needed to prevent such effects and ensure food security. The early maturing type (EMT) of rice is mainly cultivated in the central northern mid-mountainous area (CNMA). This study was conducted to shift the transplanting date of EMT and to examine the adaptability of the mid-maturing type (MMT) or mid-late maturing type (MLMT) in the Jecheon region of the CNMA to address global warming. The air temperature increased by 0.7-0.9℃ in the 2010s, compared to that in the 1980s, and was similar to other decades during the ripening period. Over the past 35 years, considering rice quality, the heading date of the Odae variety has arrived sooner by approximately 10 days, the ripened grain ratio has increased by more than 10%, and the thousand grain weight; however, the mean temperature at 40 days after heading has increased by more than 2℃. The late marginal heading date in the Jecheon region was determined as August 11 based on the accumulated temperature of 880℃ and August 15 based on 840℃ for 40 days after heading. According to different transplanting dates, milled rice yield per 10 a was the highest at 567 kg with June 10 in EMT, 595 kg with June 10 in MMT, and 572 kg with May 30 in MLMT. Considering the late marginal heading date, rice yield, and quality, the optimum transplanting date was June 15 in EMT, June 5 in MMT, and May 30 in MLMT in the Jecheon region of CNMA. Owing to global warming, MMT and MLMT are expected to be reliably cultivated in the CNMA.

• Horticultural Science & Technology
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• v.28 no.3
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• pp.492-496
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• 2010

This experiment was carried out to obtain the maximum quantity of essential oil on the basis of harvesting time, cultivation regions & types, and drying methods. We have selected 6 native and introduced herbs viz. $Thymus$ $quinquecostatus$, $Agastache$ $rugosa$, $Chrysanthemum$ $indicum$, $Rosmarinus$ $officinalis$, $Chamaemelum$ $nobile$, and $Lavandula$ $stoechas$. The quantity of essential oil ranged from 0.06% to 3.46% in all six herbs. Native herbs produce 30.5% higher quantity of oil in comparison to introduced herbs. The quantity of essential oil obtained from $Lavandula$ $stoechas$ was 3.46%, followed by $Rosmarinus$ $officinalis$ 2.89%, while minimum in $Agastache$ $rugosa$ 0.60%. Higher quantity of essential oil obtained if they are cultivated under rain shelter culture (PE film) in comparison to open field conditions. Recovery of essential oil is always high if herbs flower in July. Semi-alpine region was found better than the plain region for herbs production. Quantity of oil is high if oil is extracted from fresh herbs followed by freezed herbs, shade dry and hot wind dry herbs. As far as plant part is concern flower produced maximum oil than any other part.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.4
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• pp.284-293
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• 2020

Rice consumption in Korea has been decreasing as the eating habits of the Korean people have diversified with rapid economic growth. Recently, floury endosperm rice cultivars were developed to boost rice consumption and replace wheat flour consumption with rice flour, which is vulnerable to viviparity under wet weather during the grain-filling stage because of its loosely packed starch granule structures. To overcome this limitation, it is necessary to find a suitable rice transplanting date to produce high-quality rice flour by altering the heading ecology type and changing the cultivation time by region. We examined four floury endosperm rice cultivars (FERC) in the Cheongju (central plain area) and Boeun (mid-mountainous area) regions of Korea from 2017 to 2019. Of the FERCs, the mid-late maturing types (MMT) Seolgaeng (SG), Hangaru (HGR), and Shingil (SGL) exhibited high yield and yield components after transplanting May 30 in both regions; the early maturing type (EMT) Garumi 2 (GRM2) also exhibited high yield after transplanting June 20 in Cheongju. In addition, MMTs showed the same tendency as the characteristics shown in Cheongju when grown in the Boeun region, and EMT displayed high yield and yield components after transplanting June 10. The FERCs could easily present pre-harvest sprouting in the rainy season during the grain-filling stage after 20 days post-heading because the mean temperature and frequency of more three-day rainfalls have increased over the last 5 years from the previous annual averages. Viviparity of HGR and GRM2 decreased as the transplanting date was delayed, with decreases of 2.3%-4.6% in HGR and 11.9%-23.1% in GRM2 according to the region. SGL was generally resistant to viviparity because of the Tongil type. To minimize pre-harvest sprouting and produce high yield of rice flour in the Chungbuk province, the most suitable transplanting time was the end of May in MMT and the middle and end of June in EMT.

• Journal of agriculture & life science
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• v.53 no.2
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• pp.87-95
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• 2019

This study was carried out to select the rice variety for high quality rice according to reducing N application level (7 kg/10 a) in medium altitude and plain of southern Korea. It was cultivated to seven varieties and ten varieties in medium altitude and plain region respectively in this study. In medium altitude region, the yield of head rice was higher in most varieties except for Borami (526 kg/10 a) than the control variety, Chucheongbyeo (533 kg/10 a). On the other hand, Borami, Gopumbyeo, and onnuri were lower in head rice rate than the other varieties. In addition, Borami and Chucheongbyeo shown a lodging risk but the other varieties were safe against lodging. The milled rice protein content of Chucheongbyeo was 6.1% and the other varieties protein content was similar or lower than that of control except for Borami(6.3%). In plain region, the head rice yield of Nampyeongbyeo (527 kg/10 a) was higher than that of control variety, Ilmibyeo (503 kg/10 a). Head rice rate was lower in Hopumbyoe, Sindongjin, and Chilbobyeo than the other varieties. The varieties contained lower protein content compared Ilmibyeo (6.1%) were Hopumbyeo (5.9%), Jinsumi (6.0%), Sindongjin (5.9%), Chilbobyeo (6.0%), Hwangeumnodeul (5.8%), Hopyeongbyeo (6.0%). Amylose content, whiteness, and palatability (Toyo value) were no significant difference among varieties in two different regions. In conclusion, considering head rice rate, yield of head rice, protein content, lodging resistance, ripening rate and palatability, Pungmi1ho, Saenuri, Chilbobyeo in medium altitude region and Jinsumi, Hwanggumnodul in plain region were selected as proper rice varieties for high quality rice production in southern Korea.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.53 no.spc
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• pp.9-14
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• 2008

This experiment was carried out to clarify the effect of various transplanting dates and agroclimatic zones on quality of brown rice and yield of a pigmented rice variety ‘Josaengheugchal’. The black density of brown rice in Jecheon (central inland region) showed a slight difference among the transplanting dates, but in Cheongwon (western sobaek inland region) that had increased at the transplanting dates of June 10th to 20th. cyanidin 3-glucoside (C3G) content at the same transplanting date in Jecheon was higher than Cheongwon, and the overall C3G content was increased at the later transplanting dates. The optimum transplanting date estimated by brown rice yields and C3G content was May 11th (491 kg/10a) in Jecheon and June 16th (468 kg/10a) in Cheongwon.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.54 no.1
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• pp.7-12
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• 2009

Mungbean should be harvested several times according to its physiological characteristics and weather conditions of cultivation region. In Korea, mungbean is usually sown in June and harvested three or four times, and the cultivated area is being rapidly reduced. Therefore, the author developed cultivation techniques of mechanical harvesting suitable for the weather conditions of the southern part of the Korean peninsula. The optimum sowing time of mungbean for mechanical harvesting in southern part of Korea is around July 20. When sown around July 15, mungbean should be harvested twice and then the mechanical harvesting of mungbean was not possible. Meanwhile, when sown after July 25, the mechanical harvesting was possible but the maturing period was longer and the seed yield was decreased. Therefore, it is safe to say that in Korea the mechanical harvesting of mungbean is possible for the middle part of Korea when the plant is sown before July 20 and for the southern coastal region of Korea when sown after July 20 (if July 20 is set up as the baseline for the southern part of Korea). Out of Keumseong and Owool, which are popularized cultivars in Korea most, Owool is determined to be most appropriate for mechanical harvesting. Owool is favorable for mechanical harvesting because, when compared to Keumseong, it is higher both in plant height and in pod height, and also the seed yield is better.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.60 no.2
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• pp.248-252
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• 2015

This study was conducted to compare the growth, inorganic components, and proximate components of Codonopsis lanceolata grown in 10 regions of Korea for selecting superior species and breeding by crossing. Among the all tested lines, the shortest plant height (217.12 cm) was observed from the Ulleungdo region line (No. 4) while the longest (273.9 cm) was observed from Hwasun region line (No. 9). In addition, the lines of central and northern region (No. 1~No. 7) tend to have shorter plant height than those of southern region (No. 8~No. 9) except Jejudo region line (No. 10). Flowering tends to be late towards southern region, and lines in central and northern regions were started flowering about 2 weeks earlier than those in southern regions. However, the heaviest root weight was 13.1 g, found in only Jejudo line (No. 10) whereas there was no significant difference found in the other regions which have a range of 8.3~11.0 g. The inorganic components were varied in each line, however, proportion of macroelements, such as K, Ca, and P, was the largest for every line. Especially for Heongseong region line (No. 2), had larger proportion of macroelements than the others. There was a difference of proximate compositions of Codonopsis lanceolata, except the moisture content, among all regions, however, it was generally shown that the content of crude protein (1.31~3.76%) and crude fiber (2.18~3.12%) was the highest.