• Plant Resources
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• 제3권3호
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• pp.184-193
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• 2000

Soybean [Glycine max (L.) Merr.] seed weight is a important trait in cultivar development. Objective of this study was to identify and confirm quantitative trait loci (QTLs) for seed weight variation in the F2 and F2:3 generations. QTLs for seed weight were identified in F2 and F2:3 generations using interval mapping (MapMaker/QTL) and single-factor analysis of variance (ANOVA). In the F2 plant generation (i.e., F3 seed), three markers, OPL9a, OPM7a, and OPAC12 were significantly (P<0.01) associated with seed weight QTLs. In the F2:3 plant row generation (i.e., F4 seed), five markers, OPA9a, OPG19, OPL9b, OPP11, and Sat_085 were significantly (P<0.01) associated with seed weight QTLs. Two markers, OPL9a and OPL9b were significantly (P<0.05) associated with seed weight QTLs in both generations. Two QTLs on USDA soybean linkage group C1 and R were identified in both F2 and F2:3 generations using interval mapping. The linkage group C1 QTL explained 16% of the variation in seed weight in both generations, and the linkage group R QTL explained 39% and 41% of the variation for F2 and F2:3 generation, respectively. The linkage group C2 QTL identified in F2:3 generation explained 14.9% of variation. Linkage groups C1, C2 and R had previously been identified as harbouring seed size QTLs. The consistency of QTLs across generations and populations indicates that marker-assisted selection is possible in a soybean breeding program.

• Journal of the Korean Data and Information Science Society
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• 제13권2호
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• pp.97-104
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• 2002

K-Means modelling has been tried for finding major DNA marker of ILST035 microsatellite loci in Hanwoo Chromosome 6 linkage map. Major DNA markers are obtained from the ILST035 microsatellite through quantitative trait loci(QTL) and data mining modelling.

• 전기학회논문지
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• 제67권9호
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• pp.1165-1173
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• 2018

Recently, owing to environmental problems and instability of rare earth resources market, non-rare earth electric motors are attracting attention. As a non-rare earth motor type, a wound rotor synchronous motor(WRSM) has high power density and wide driving range further it can reduce loss by field current control during field weakening control at high speed. However, since the d-axis flux of the WRSM is coupled with the rotor circuit, the fluctuation in the d-axis flux linkage affects the rotor circuit, which causes ripple of the field current and torque. In this paper, we propose the field current ripple compensation method by injecting the feedforward voltage. the proposed compensating method was demonstrated by simulation and experiments.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2015년도 학술발표회
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• pp.220-220
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• 2015

Water, energy, and food security already became a risk that threatens people around the world. Increasing of resources demand, rapid urbanization, decreasing of natural resources and climate change are four major problems inducing resources' scarcity. Indeed, water, energy, and food are interconnected each other thus cannot be analyzed separately. That is, for simple example, energy needs water as source for hydropower plant, water needs energy for distribution, and food needs water and energy for production, which is defined as W-E-F nexus. Due to their complicated linkage, it needs a computer model to simulate and analyze the nexus. Development of a computer simulation model using system dynamics approach makes this linkage possible to be visualized and quantified. System dynamics can be defined as an approach to learn the feedback connections of all elements in a complex system, which mean, every element's interaction is simulated simultaneously. Present W-E-F nexus models do not calculate and simulate the element's interaction simultaneously. Existing models only calculate the amount of water and energy resources that needed to provide food, water, or energy without any interaction from the product to resources. The new proposed model tries to cope these lacks by adding the interactions, climate change effect, and government policy to optimize the best options to maintain the resources sustainability. On this first phase of development, the model is developed only to learn and analyze the interaction between elements based on scenario of fulfilling the increasing of resources demand, due to population growth. The model is developed using the Vensim, well-known system dynamics model software. The results are amount of total water, energy, and food demand and production for a certain time period and it is evaluated to determine the sustainability of resources.

• Asia pacific journal of information systems
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• 제15권2호
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• pp.171-193
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• 2005

Small firms are considered as the last mile in electronic networks of business enterprises. Since small firms lack in their resources and capabilities for IT deployment, it seems a challenging project to make them electronically linked to their trading partners. This study aims to investigate the factors that influence the intent of small firms to adopt electronic linkage to their trading partners. This study considers the context where small firms already have transaction relationships with partner firms and where their adoption of electronic linkage may influence the nature and performance of the transactional relationships. This study considers the expected value of electronic linkage and the joint actions of the trading firms as the major factors. Its research model also includes traditional factors such as influences from the industry and the trading partner, the support of CEO, and the readiness of the trading partner. Based on the survey data from more than 1000 small firms, the present study performs regression analysis and finds that all but one factor are significant in explaining the variations in the adoption intention of small firms. The exception is the joint action, which is shown to decrease the intention. Based on the results, this study offers business and policy implications that would be useful to business managers and policy makers.

• 생명과학회지
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• 제19권9호
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• pp.1239-1244
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• 2009

본 연구는 제주도에서 자생하는 새우난초 3개체, 금새우난초 3개체 그리고 변이종 14개체를 포함하여 총 20개체를 화색에 따라 분류하고 유전자지도를 작성하여 QTL분석을 하였다. 화색은 새우난초가 어두운 자색으로 CIE Lab값이 $40{\sim}50$ 정도였으며, 금새우난초는 황색으로 $110{\sim}130$ 정도였고, 변이종 개체들은 새우난초와 유사하거나 다소 높았다. PCR 결과 얻은 polymorphism이 인정되는 154개 marker에 대한 분리비 적합도 검정에서 51개 marker에서 5% 수준의 유의성이 인정되었으며, 유의성이 인정된 51개 marker 중에서 새우난초 type은 37개, 금새우난초 type은 14개 였다. Polymorphism이 인정된 154개 marker에 대하여 MAPL program을 이용하여 이들 marker 상호간의 연관관계를 분석한 결과는 16개의 연관군과 1개의 독립군으로 구분되었으며, 이들 연관군에 대한 분자연관지도는 전체 group의 크기가 220.4 cM (centi Morgan)이고, marker간의 평균거리는 3.3 cM이었다. 양적 형질에 대한 분자연관지도상의 QTL 분석 결과, LOD 3.0 이상인 화색과 설판색의 QTL은 각각 3개와 1개였다. 이상에서 얻어진 자료는 새우난초 속의 화색 연구에 도움이 될 것으로 사료된다.

• 한국심리학회지:학교
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• 제17권3호
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• pp.357-377
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• 2020

본 연구에서는 심리상담사의 지역사회자원연계 능력을 측정할 수 있는 척도를 개발하고 신뢰도와 타당도를 알아보았다. 먼저. 선행연구를 통해 5가지 영역, 총 42문항으로 구성된 예비 문항을 제작하였다. 이후 한국상담심리학회 소속 심리상담사 1급 자격증을 소지한 상담전문가들에게 내용 타당도와 안면 타당도를 검증받았고, 그 결과 4가지 영역 총 20개로 된 최종 문항을 도출하였다. 최종 문항은 심리상담사(N=306)에게 제공되었고, 수집된 설문을 통해 척도의 신뢰도와 타당도를 살펴보았다. 그 결과, 탐색적 요인분석에서는 2요인이 확인되었고, 확인적 요인분석에서는 2요인이 적합한 것으로 나타났다. 두 요인은 각각 '정보의 수집과 활용'과 '정보의 조직과 연계'로 명명되었으며, 척도는 공인 타당도, 내적 합치도, 검사-재검사 신뢰도 분석 결과에서 양호한 것으로 나타났다. 본 연구에서 개발한 척도는 심리상담사를 위한 지역사회자원연계 능력 척도라는 점에서 의의가 있다. 본 척도는 Wee클레스나 Wee센터, 청소년 상담복지센터 및 그 외 상담 현장 등에서 유용하게 사용할 수 있을 것으로 기대된다.

• Journal of Korea Trade
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• 제25권2호
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• pp.1-21
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• 2021

Purpose - The purpose of this research is to develop two medical tourism system models which explain medical tourism phenomenon with a systemic approach. Design/methodology - This research was conducted by using a qualitative data analysis which mainly refers to previous references of medical tourism in the areas of tourism and medicine. Leiper's tourism system model was utilized as a conceptual framework. In-depth interviews with experts in the field were conducted in order to pretest the models. Findings - This research suggests a medical tourism system framework and a medical service provision framework. The first model presents medical tourism components and their relationships within a framework presented in a diagram. The second model shows the relationships among medical services required by medical tourists, the service providers, and service human resources along with movements of medical tourists. Originality/value - The first model presents a spatial composition of medical tourism components and their relationships, whereas the second model shows the linkage among medical services, the service providers, and relevant service human resources along with time sequential steps of medical tourists. These two models are complementary and may be used as useful tools to observe medical tourism phenomenon with a systemic and holistic approach. These two models may enable stake holders avoid unnecessary confusions and conflicts that result in duplication of government policies and a waste of budget and human resources.

• 생명과학회지
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• 제13권4호
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• pp.375-382
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• 2003

본 연구는 콩 cyst 선충 race 14에 대한 저항성 QTLs 구명을 목적으로 한 바 결과를 요약하면 다음과 같다. 1. 회귀분석 결과 30개의 marker들(29 RAPD, 1 RFLP)에서 cyst 선충 race 14의 저항성에 대한 유의성이 인정되었다. 2. MAPMAKER/QTL 분석 결과 2개의 QTL들이 구명되었는데, 이 QTL들은 2개의 linkage groups (LGC-7와 LGC-9)에 위치하였으며, 모두 우성유전 양상을 나타내었다. 3. 다중회귀분석 결과 2개의 marker들($B15^2$와 $H06^1$)로 구성된 조합에서 가장 높은 표현적 변이의 값(22.9%)을 나타내었다. 콩 cyst 선충 rare 14에 대한 표현적 변이를 충분히 설명하기 위해서는 지속적인 QTL 구명 연구가 요구된다.

• 한국산학기술학회논문지
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• 제9권1호
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• pp.154-159
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• 2008

본 연구에서는 수자원 기초자료 중 매우 중요하고 효과적인 유량측정방법을 위해 가장 먼저 결정하여야할 평균유속을 어떻게 결정할지를 제안코자 하며, 이를 위하여 현재까지 가장 널리 응용되고 있는 평균유속공식인 Manning공식과 최근에 그 효용성이 입증된 Chiu의 유속공식과의 상호관계에 대하여 분석 검토하여, 수로경사가 변화하는 경우나 유사유무에 관계없이 주어진 단면에서의 엔트로피 값, 즉 평형상태를 유지하려는 경향이 있음을 증명하였다. 따라서 인공수로에 관련된 간단한 수리입력 자료만 있다면 그동안 취득하기 어려운 $u_{max}$와 전체유속분포 산정에 매우 유용하게 사용될 수 있다고 사료된다.