• Journal of Internet Computing and Services
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• v.17 no.2
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• pp.1-9
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• 2016

Users are provided infrastructure such as CPU, memory, network, and storage as IaaS (Infrastructure as a Service) service on cloud computing environments. However storage instances cannot support the maximum storage capacity that SQL servers can use, because the capacity of instances provided by service providers is usually limited. In this paper, we propose a method of securing mass storage capacity for SQL servers by sharing network disks with limited storage capacity. We confirmed through experiments that it is possible to secure mass storage capacity, which exceeds the maximum storage capacity provided by an instance with Amazon EBS on Amazon EC2 Windows environments, and it is possible to improve the overall performance of the SQL servers by increasing the disk capacity and performance.

• Journal of Life Science
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• v.17 no.10
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• pp.1336-1340
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• 2007

The regeneration and growth of bulblets from the bulb scale segments of Hyacinthus orientalis L. cv. Pink Pearl were more efficient in IBA than IAA at the same concentrations (1.0 and 3.0 mg/l). The normal (base-down) orientation of explants was more effective for bulblet regeneration and root growth than the inverted (base-up) orientation. The growth of bulblets and roots was increased higher in the perlite than the agar medium. These results suggested that the alternate culture system, first cultured in the agar medium for bulblet regeneration, and then in the perlite medium for bulblet growth, may be more useful for efficient in vitro culture of hyacinth (H. orientalils) cv. Pink Pearl.

• Journal of Life Science
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• v.17 no.7 s.87
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• pp.990-995
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• 2007

We tested the effect of sodium tungstate, which disturbs the molybdenum cofactor formation, on the activities of aldehyde oxidase(AO) and the growth of maize(Zea mays) primary roots. As reported in other plants, sodium tungstate inhibited AO also in the maize root concentration-dependently. The inhibitory effect of sodium tungstate was observed only when the inhibitor was applied to the living plants. Application of tungstate to the extracted protein did not show any effect. Western analysis revealed slightly decreased level of AO protein in the presence of tungstate, indicating a positive feedback of gene regulation by the product. We also tested the effects of tungstate on the root growth. The elongation of primary root and the development of lateral roots, which are sensitive to the absolute level of auxin, were decreased in the presence of sodium tungstate. However, the gravitropic curvature of the primary root, which is dependent on the relative amount of auxin at both sides, was unaffected. These data suggested the decrease of auxin biosynthesis by the application of tungstate. However, the level of free IAA was unaffected by tungstate application. We discuss the possible explanations for the observed results.

• The Korean Journal of Pesticide Science
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• v.17 no.4
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• pp.379-387
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• 2013

In order to improve practical utility of agro-microorganisms (AMs) which had been cultured and disseminated to promote plant growth and to control crop diseases, 51 isolates of AMs were collected from 18 agricultural extension centers in local government and screened for multi-functions such as antifungal activity, activities of phosphorus solubilization, IAA and siderophore production, nitrogen fixation, and hydrolytic enzyme activity. Finally we selected one isolate showing good antifungal activity and multi-functions related to plant growth and disease control. The selected isolate, Paenibacillus polymyxa CW, showed good inhibitory effect against plant pathogens, Pyricularia gresea, Colletotrichum acutatum, Fusarium oxysporum, Phomopsis sp., Aspergillus niger, Rhizoctonia solani and Phytophthora capsici. Suppressive effect of P. polymyxa CW against the used plant pathogens except for R. solani was much higher than that of P. polymyxa AC-1 storing in National Academy of Agricultural Science. We found P. polymyxa CW isolate showed good activity in siderophore and IAA formation, and nitrogen fixation. With P. polymyxa CW isolate, siderophore formation activity was similar to that of P. polymyxa AC-1, but IAA formation and nitrogen fixation activity was much higher than that of P. polymyxa AC-1. However neither P. polymyxa CW nor P. polymyxa AC-1 showed hydrolytic enzyme (chitinase, pectinase and cellulase) activity. The treatment of P. polymyxa CW with culture suspension of different cell density ($10^8$, $10^7$. $10^6$ cfu/ml) showed that the highest density reduced incidence of red pepper powdery mildew by 68.3% after 10 days of application. As application density of P. polymyxa CW was decreased, its control efficacy was proportionally decreased. In addition, when P. polymyxa CW was treated to control tomato powdery mildew at the same concentrations and their control effects were investigated after 7 days of inoculation, disease incidence was 0.03, 19.5, 45.7%, respectively, compared to 56.3% that of untreated check. Like red pepper powdery mildew, increase of application density of P. polymyxa CW resulted in increase of its control efficacy proportionally. P. polymyxa CW showed a density-dependent control efficacy against red pepper and tomato powdery mildews. Therefore we think that mode of action of the antagonist for suppressing two powdery mildew diseases might be antibiosis and density of more than $10^8cfu/ml$ was needed to control effectively the two diseases. On this basis, we think that P. polymyxa CW can be a promising control agent for suppressing powdery mildews of red pepper and tomato.

• Current Research on Agriculture and Life Sciences
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• v.17
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• pp.53-57
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• 1999

The experiments were conducted to determine the factors such as light and darkness, phytohormone and seed coat, influencing on seed germination of Bidens tripartita L. and B. frondosa. The seeds of both species were germinated when seed coat was damaged and weakened. $GA_3$ and BA stimulated germination of both species but ABA and IAA had no effect on germination of them, which ranged 50.0% to 80.0%. In B. forndosa, when inner layer of seed coat was removed, germination was highly promoted up to 96.7% compared with 10.0% germination rate in another treatments.

• Korean Journal of Plant Resources
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• v.17 no.2
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• pp.153-160
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• 2004

Glehnia littoralis is known as an edible and medicinal plant using green loaves and mature roots of plant. In the present paper, the influence of plant growth regulators on callus induction and plant regeneration was investigated. Callus induction and regeneration occurred from leaf and petiole explants in Glehnia littoralis. Optimal condition of plant growth regulators for callus induction from leaf and petiole explants was MS basal medium supplemented with 2mg/L 2,4-D and 2mg/L BA. The frequency of callus induction was higher in petiole explant than leaf. When the callus was cultured on MS basal medium supplemented with 0∼1 mg/L IAA, 0∼1mg/L NAA and 0∼2mg/L BA for about 65 days, the most effective plant growth regulators on plant regeneration from callus were 1mg/L NAA and 2mg/L BA. The plantlets acclimatized successfully and grown in vermiculite matrix.

• Asian-Australasian Journal of Animal Sciences
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• v.31 no.5
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• pp.721-728
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• 2018

Objective: This experiment was conducted to determine the differences in the apparent ileal (AID) and total tract digestibility (ATTD) of nutrients and indispensable amino acids (IAA) in high-fiber diets with wheat middlings, rice bran or alfalfa meal fed to Duroc${\times}$(Landrace${\times}$Yorkshire) (DLY) and Duroc${\times}$ (Berkshire${\times}$Jiaxing) (DBJ) growing barrows. Methods: Eighteen DLY and 18 DBJ growing barrows were randomly allotted to a $2{\times}3$ factorial arrangement involving 2 crossbreeds and 3 high-fiber diets. The experiment lasted 15 d with 10 d for diets adaptation, 3 d for feces collection and 2 d for digesta collection. Three diets were based on corn and soybean meal with 25% wheat middlings, rice bran and alfalfa meal respectively. Results: DBJ had a greater (p<0.05) AID of isoleucine, leucine, lysine, phenylalanine and valine and a lower (p<0.05) AID of methionine than DLY. The hindgut disappearance of acid detergent fiber for DBJ was greater (p<0.05) than DLY. The ATTD of gross energy, dry matter, organic matter, neutral detergent fiber and acid detergent fiber in wheat middlings diet were greater (p<0.05) than in rice bran and alfalfa meal diets. The hindgut disappearance of neutral detergent fiber and acid detergent fiber in wheat middlings diet or rice bran diet were the highest or lowest (p<0.05), and those of alfalfa meal diet were the middle. Barrows fed rice bran diet had a greater (p<0.05) hindgut disappearance of gross energy, dry matter and organic matter and lower hindgut disappearance of neutral detergent fiber and acid detergent fiber than barrows fed alfalfa meal diet Conclusion: DBJ growing barrows showed a significant higher digestibility of fiber in the hindgut and most IAA in the small intestine compared with DLY barrows. The digestibilities of chemical constituents and IAA were affected by the diets formulated with different fiber sources.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.29-29
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• 2019

상동나무(Sageretia theezans)는 갈매나무과 상동나무속 식물로 특이하게 늦가을에 꽃이 피고 봄에 열매가 익는 수종이며, 최근 암세포 생장억제 효과가 입증되고 제주와 전남 남해안 지역에서 예로부터 열매를 식용 및 약용하여 민속식물로서의 가치가 크다. 본 연구에서는 향후 약용소재로서의 가치가 높은 상동나무의 대량증식을 위하여 식물생장호르몬의 처리에 따른 효과적인 증식법을 구명하고자 실시하였다. 상동나무 삽수묘는 고흥, 완도 일대에서 2019년 3월 19일에 2년생 가지를 수집하였으며, 3월 20일 삽목을 실시하였다. IAA(250, 500, 1,000 ppm), IBA(250, 500, 1,000 ppm), NAA(250, 500, 1,000 ppm), 루팅(200배) 수용액에 50개의 삽수묘를 3분간 절단기부를 침지 후 모래에 치상하였으며, 무처리구는 바로 치상하였다. 각 삽수상은 온실에 보관 후 1일 2회씩 관수 하였으며 120일간 유지하였다. 그 결과 전체 66.4%의 발근율을 보였고 캘러스와 뿌리의 발달은 평균 17.5 mm의 길이를 보였다. IBA 처리구가 전반적으로 높은 발근율을 보였는데 그 중 500 ppm 처리구에서 가장 많은 41개 삽수묘의 부정근이 형성되어 82%의 발근율을 보였고, 평균 20.2 mm 길이의 뿌리가 생성되었다. IBA 1,000 ppm처리구에서도 38개의 삽수묘에서 캘러스 및 부정근이 형성되어 76%의 발근율을 보였다. 뿌리의 발달은 평균 18.4 mm로 IBA 500 ppm에 비해 길이가 짧았으나 뿌리의 길이가 삽수묘간 차이가 커 가장 긴 개체가 32.3 mm로 나타났다. NAA 500 ppm에서도 높은 발근율을 보였는데 32개의 삽수묘에서 부정근이 형성되어 64%의 발근율로 나타났다. 뿌리의 길이는 18.9 mm로 IBA 1,000 ppm에 비해 발근율은 낮았으나 뿌리의 발달은 평균 0.5 mm 높은 것으로 나타났다. 무처리구는 29개의 삽수묘가 캘러스 및 부정근이 형성되었으며 58%의 발근율로 나타났으며 IAA, IBA, NAA 처리구 모두 무처리구에 비해 높은 발근율을 보였다. 생장호르몬 당 발근율을 보면 IBA는 500 ppm, NAA는 500 ppm, IAA는 1,000 ppm에서 가장 높은 발근율을 보였다. 루팅 수용액 처리구는 60%의 발근율을 보여 루팅 200배 수용액 침지와 무처리는 비슷한 수치의 발근율로 나타나 루팅은 상동나무 삽목 발근촉진제로 효과가 없는 것으로 확인되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.33-36
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• 2013

클라우드 컴퓨팅 기술은 이용자로 하여금 자원을 편리하게 이용할 수 있게 하며 낮은 TCO(Total Cost of Ownership)를 보장하는 기술로 널리 사용되고 있다. 특히 IaaS에서 많은 기대를 할 수 있는데, 이 기술 중에 하나가 서버 가상화 기술이다. 가상화된 서버를 관리하기 위해서 쓰이는 기술 중 하나가 바로 라이브 가상 머신 마이그레이션으로 이는 서비스를 제공하고 있는 서버의 구동 중지 시간을 줄여 이용자의 불편함을 최소로 하는 기술이다. 그러나 라이브 가상 머신 마이그레이션은 기존의 방법보다 마이그레이션 시간이 길어 네트워크 자원을 오래 쓰는 단점이 있다. 이런 단점을 보완하기 위해 본 논문에서는 pre-copy 예측을 통한 마이그레이션 시간 감축 기법을 제안한다. pre-copy를 예측하는 기법을 소개하고 이를 이용한 통제 알고리즘을 보이며 이를 Xen에 적용했을 때의 결과를 보인다. 적용해본 결과 기존의 방법보다 마이그레이션 시간이 최대 17% 향상됨을 볼 수 있었다.

• Korean Journal of Soil Science and Fertilizer
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• v.47 no.6
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• pp.571-578
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• 2014

The garlic cultivation area is moved by change of grown environment due to global warming. It is important to predict changes in cultivation area, quantity and quality of each crop. This study was carried out to estimate the yield and response of garlic growth by the rapid temperature changes in the greenhouse with thermostat control system. Seedlings of Namdo garlic were planted on September 27, 2012 and harvested on May 30, 2013. The used treatments for a rapid temperature change in March-April-May were T0 (control): $6.0-10.4-17.2^{\circ}C$, T1: $6.0-5.4(-5)-17.2^{\circ}C$, T2: $6.0-10.4-22.2(+5)^{\circ}C$ and T3: $6.0-5.4(-5)-22.2(+5)^{\circ}C$. Total dried weight per plant of garlic significantly increased by 5.0% for T2, but T1 and T3 decreased by 12.5 and 4.6%, respectively, compared to T0. Total yields of bulb within the temperature change as T2 and T0 increased significantly (p<0.05), as compared to T1. Decreasing temperature significantly (p<0.05) reduced plant height, SPAD reading, crude protein and fiber contents etc., as compared to T0 and T2. ABA contents gradually increased with time but IAA content rapidly decreased. Conclusively, growth and yield of garlic were more affected by decreased temperature than increased temperature at bulb development stage.