• Title/Summary/Keyword: Selections

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Fungicide selections for control of chili pepper stem rot caused by Sclerotium rolfsii using an agar dilution method

  • Lee, Soo Min;Min, Jiyoung;Kim, Heung Tae
    • Korean Journal of Agricultural Science
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    • v.44 no.3
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    • pp.339-347
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    • 2017
  • Sclerotium rolfsii causing southern blight on numerous vegetable and fruit crops was isolated from stems of chili peppers showing wilting symptoms. The pathogen was identified by morphological observation and DNA sequencing analysis of ITS region. To select an effective fungicide for control of southern blight, we investigated the inhibition efficacy of thirty fungicides included in nine groups of fungicides with different mechanisms of action. A fungal growth inhibition assay was conducted through an agar dilution method by using mycelial discs and sclerotia of the pathogen as inoculum, respectively. When mycelial discs were used as an inoculum, several fungicides showed good inhibitory activity against the mycelial growth of S. rolfsii 12-6. All DMI fungicides tested had a good inhibition except for prochloraz which had low inhibitory effect. All strobilurin fungicides tested except for kresoxim-methyl and all SDHI fungicides tested except for boscalid and fluopyram, had a good inhibition. Also, fludioxonil, a protective fungicide and fluazinam had a good inhibitory effect. Interestingly, when sclerotia were used as an inoculum, inhibition efficacy was increased for fluopyram, a SDHI fungicide, and for some protective fungicides such as propineb, chlorothalonil, dithianon, and folpet. All the fungicides selected in this study should be tested in the field for their control activities against stem rot for practical use in chili pepper cultivation.

An Agent System for Efficient VOD Services on Web (효율적 웹 기반 VOD 서비스를 위한 에이전트 시스템)

  • Lee Kyung-Hee;Han Jeong-Hye;Kim Dong-Ho
    • Journal of Digital Contents Society
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    • v.2 no.1
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    • pp.73-79
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    • 2001
  • Most of the existing algorithms try to disseminate the multimedia contents of internet service provider(ISP), without taking into account the needs and characteristics of specific websites including e-learning systems with web-based .educational contents. Sometimes the client must select the best one among the replicated repositories. However, this is a less reliable approach because clients' selections are made without prior information on server load capacity. In this paper we propose an agent system inspired by the need of improving QoS of delivering web-based educational multimedia contents without incurring long access delays. This agent system consists of three components, Analyzer, Knowledge Base, and Automaton embedded the capacity algorithm. It analyzes and investigates traffic information collected from individual replicated server by learners' requests, and selects a server which is available and is expected to provide the fastest latency time and the lowest loaded capacity, and achieves high performance by dynamic replicating web resources among multiple repositories.

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Genetic Variation of Larval Stripe Patterns of Spodoptera exigua(Hubner) (파밤나방(Spodoptera exigua (H bner)) 유충 줄무늬 형질의 유전변이)

  • 김용균
    • Korean journal of applied entomology
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    • v.37 no.2
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    • pp.163-170
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    • 1998
  • Larval morphological characters such as body color and stripe pattern were analyzed to get morphological genetic markers of beet armyworm, Spodoptera exigua (Hiibner). Body color was varied from light green to dark brown with diets. Stripe characters were classified by the presence of dorsal and lateral lines: three stripes with both lines, one stripe with dorsal line only, and zero stripe. Proportions of each stripe character increased with successive selections for its own character. Three stripe was dominant to one stripe when they were crossed. The estimated heritability in narrow sense (h2) of the stripe pattern was 0.50k0.42. About two fold more females than males were produced in zero stripe line. Stripe pattern was not significantly changed by different diets except in welsh onion which had lower proportion of three stripe individuals than that of the expected. Larval stripe pattern was also correlated with larval and pupal developmental rates and cold hardiness but not with insecticide susceptibility.

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Linkage of GSIS and Expert System for Route Selection (노선선정을 위한 GSIS와 전문가체계의 연계)

  • 이형석;배상호;강준묵
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.19 no.2
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    • pp.137-146
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    • 2001
  • Route selection needs the analysis function of GSIS to analyze and manipulate a lot of spatial information efficiently. Therefore, it needs the linkage of system requiring the knowledge and the experience of experts as a method that can estimate each quantitative route for an efficient route selection. In this study, the route selection model through construction and analysis procedure of position information using GSIS were presented, and route selection system linked with expert system was developed. This system is easy to be used and managed for presenting route alignment according to conditions as a graphic user interface environmental window system by applying three tiers based object-oriented method. Using GSIS, the various information required for route selections in database was constructed, the characteristics of subject area by executing three-dimensional terrain analysis was grasped effectively, and the control point through buffering, overlay and location operation was extracted. Three alternative routes between a beginning point and an end point inputted by route selection system were selected. Therefore, the applications of the route selection system are presented by applying this system to the real study area.

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The Effects of Simulation Practicum using a Standardized Patient on Nursing Students' Communication Skills, Problem-Solving Skills, Critical Thinking Dispositions, and Clinical Competency (표준화 환자를 적용한 시뮬레이션 수업이 간호대학생의 의사소통능력, 문제해결능력, 비판적 사고성향 및 임상수행능력에 미치는 효과)

  • Chung, Su Kyoung;Kim, Kyoung Ah;Jeong, Eun Young
    • Journal of Home Health Care Nursing
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    • v.23 no.2
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    • pp.186-194
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    • 2016
  • Purpose: The purpose of this study was to evaluate the effects of standardized patient simulation on nursing students' communication skills, problem-solving skills, critical thinking dispositions, and clinical competency. Methods: A one-group pretest-posttest design was used. Data were collected from a convenient sample of 47 junior nursing students at W University. Scenarios to train SP and checklists to evaluate the students''competence were developed by our research team. The collected data were analyzed with descriptive analysis t-test, Pearson's Correlation Coefficient and Cronbach's ${\alpha}$ using SPSS WIN 21.0 Program. Results: The simulation practicum using a standardized patient was conducted based on four steps, namely, selections of scenario modules, standard patient training, implementation, and evaluation. The differences between the pre and post-test scores of problem-solving skills(t=-2.94, p=.005) and clinical competency(t=-2.84, p=.007) were statistically significant. But communication skill(t=-.32, p=.747) and critical thinking(t=-.68, p=.498) was not different in group. Conclusion: Standardized patient simulation in nursing education may be useful the improvement of problem-solving skills and clinical competency.

Degradation Characteristics of Aqueous MEA Solution by Corrosion Products and Absorption Conditions (흡수 조건 및 부식 생성물에 의한 MEA 수용액의 변성 특성)

  • NAM, SUNGCHAN;SONG, YOONAH;BAEK, ILHYUN;YOON, YEOIL;YOU, JEONGKYUN;LEE, CHANGHA
    • Journal of Hydrogen and New Energy
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    • v.27 no.3
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    • pp.290-297
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    • 2016
  • The absorbent loss due to degradation in $CO_2$ capture process using aqueous alkanol amine solution has adverse effect on the economics of overall process. The degradation causes absorbent loss, equipment corrosion, foaming, adhesive material producing and viscosity increase in operation. In this study, the degradation characteristics of $CO_2$ capture process using MEA (monoehtanolamine) under various conditions such as $O_2$ partial pressure, $CO_2$ loading and absorbent temperature. The effects of iron, which generated from the equipment corrosion, on absorbent degradation were studied using $Fe_2SO_4$ containing MEA solution. The produced gases were analyzed by FT-IR(Fourier Transform Infrared Spectrophotometer) and the specifically measured $NH_3$ concentration was used as a degradation degree of aqueous MEA solution. The experiments showed that the higher $CO_2$ loadings (${\alpha}$), $O_2$ fraction ($y_{O2}$) and reaction temperature enhanced the more degradation of aqueous MEA solution. Comparing other operation parameters, the reaction temperature most affected on the degradation. Therefore, it could be concluded that the above parameters affects on degradation should be considered for the selections of $CO_2$ absorbent and operating conditions.

Performance Dress Purchasing Behavior and Design Preference of Pianists (피아노 연주자의 연주복 구매행동과 디자인 선호도)

  • Lee, Soo-Jung;Lee, Ji-Yeon;Park, Myung-Ja
    • Journal of the Korea Fashion and Costume Design Association
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    • v.9 no.3
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    • pp.115-132
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    • 2007
  • The purpose of this research is that to study of musical performer's purchasing behavior, satisfaction and design preference, and to give the information for better performance costume market based on that result. The target for the survey is limited only for above 4th grade female students and have experienced more than three times of performances. Total 364 questionnaires are used for this research. The SPSS was used for the analysis. The results were, first, in the survey of place of purchasing, specialty shop for musical performance shop was the most. The most group for the budget that they spent was under 100,000 Won. Rational price for costume would be 150,000-300,000 Won. Most people purchase costume before 2 weeks and compare 3-4 stores mostly. There were not many complaints about being comfort for costume itself. The preference for costume was different depends on not only scale of performance but also whether solo, duet or trio or more. Also harmony with other person costume was most consideration factor when they perform duet or more. For the choice of shop factor following were considered the most important; various selections, kindness of sales persons and possibility for trying various costumes. However, locations of shop or delivery service were not important relatively. For the choice of costume factor, design color, comfort and functionality were considered the most important but price, quality and decoration were not. For 'the satisfaction after purchase costume' factor, people's opinions, best appearance on the stage and meeting image with themselves were considered the most important. Second, on the subject for 'design preference of costume based on type of performance', people chose different color of dress depends on what types of performance. In case of solo, they prefer vivid primary color; in case of trio or more, they prefer black; in case of duet, they prefer pastel tone. As for preference of sleeve design, all of them prefer non-sleeve type.

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A Study on Efficient UWB Positioning Error Compensation Technique (효율적인 UWB 무선 측위 오차 보상 기법에 관한 연구)

  • Park, Jae-Wook;Bae, Seung-Chun;Lee, Soon-Woo;Kang, Ji-Myung;Lee, Won-Cheol
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.10A
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    • pp.727-735
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    • 2009
  • To alleviate positioning error using wireless ultra-wideband (UWB) is primary concern, and it has been studied how to reduce the positioning error effectively. Thanks to many repeated transmissions of UWB signals, we can have a variety of selections to point out the most precise positioning result. Towards this, scanning method has been preferred to be used due to its simplicity. This exhaustive method firstly fixes the candidate position, and calculates the sum of distances from observed positions. However, it has tremendous number of computations, and the complexity is more serious if the size of two-dimensional range is the larger. To mitigate the large number of computations, this paper proposes the technique employing genetic algorithm and block windowing. To exploit its superiority, simulations will be conducted to show the reduction of complexity, and the efficiency on positioning capability.

Bandwidth selections based on cross-validation for estimation of a discontinuity point in density (교차타당성을 이용한 확률밀도함수의 불연속점 추정의 띠폭 선택)

  • Huh, Jib
    • Journal of the Korean Data and Information Science Society
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    • v.23 no.4
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    • pp.765-775
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    • 2012
  • The cross-validation is a popular method to select bandwidth in all types of kernel estimation. The maximum likelihood cross-validation, the least squares cross-validation and biased cross-validation have been proposed for bandwidth selection in kernel density estimation. In the case that the probability density function has a discontinuity point, Huh (2012) proposed a method of bandwidth selection using the maximum likelihood cross-validation. In this paper, two forms of cross-validation with the one-sided kernel function are proposed for bandwidth selection to estimate the location and jump size of the discontinuity point of density. These methods are motivated by the least squares cross-validation and the biased cross-validation. By simulated examples, the finite sample performances of two proposed methods with the one of Huh (2012) are compared.

New Early Maturing Variety with Large Fruits of Korean Native Cornus kousa BUERGER (조생종 대과형 산딸나무 신품종 선발)

  • 심경구;하유미;김영해;김동수;이선아
    • Journal of the Korean Institute of Landscape Architecture
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    • v.32 no.2
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    • pp.120-129
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    • 2004
  • This study was carried out to develop new varieties with early maturing and large fruit size in the Korean native dogwood (Cornus kousa) for woody landscape plants from native sites or cultivated area. The results are obtained as follows; We selected strains with early maturing and large fruit. size from the habitats from 2000 to 2003. ‘SKK 2-1’ had 4.0cm of fruit size while 2.0 cm of native variety. In addition, ‘SKK 2-2’, ‘SKK 2-3’, ‘SKK 2-4’, and ‘SKK 2-5’ with large fruit and early maturing were preliminary selected from the habitats. In the preliminary selections, ‘SKK 2-1’ was finally selected as new early maturing variety with large fruits in 2003. New early maturing variety with large fruit size, C. kousa var. ‘SKK 2-1’ was selected from 200 plants of 5-year-old seedlings in C. kousa in 5-12 Nung wean ri Goo sung myun Yong In, Kyung gi do, Korea in 2000. Their fruits were colorized in September 18, 20∼25 days earlier than October 7 of native varieties. Its fruit diameter is larger than 4cm. Its fruit weight was 5 times as heavy as native cultivars grown in Korea. This useful characters were still inherited after grafting. However, characteristics of growth, leaf, flower, and flowering period were not different from those of native varieties. Therefore, it was very promising landscape woody plant, having large fruits in early fall season. The rooting rate of Korean dogwood was high by the IBA treatment. The optimum date for softwood cutting was on June 25 ∼ July 25 when the rooting rate was more than 80%. In addition. Korean dogwood was easily propagated by grafting. Therefore, new early maturing variety with large fruits, C. kousa var. ‘SKK 2-1’ is easily propagated by softwood cutting or grafting and then is a promising cultivar as a woody landscape plant.