• Title/Summary/Keyword: Linkage and Association

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Genome-wide Linkage Study for Plasma HDL Cholesterol Level in an Isolated Population of Mongolia

  • Park, Han-Soo;Kim, Jong-Il;Cho, Sung-Il;Sung, Joo-Hon;Kim, Hyung-Lae;Ju, Young-Seok;Bayasgalan, Gombojav;Lee, Mi-Kyeong;Seo, Jeong-Sun
    • Genomics & Informatics
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    • v.6 no.1
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    • pp.8-13
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    • 2008
  • High-density lipoprotein (HDL) whose primary role is to transport cholesterol from peripheral tissues to the liver, is associated with the incidence of coronary heart disease. We analyzed HDL cholesterol levels in a genetically isolated population of extended Mongolian families. A total of 1002 individuals (54.5% women) from 95 families were enrolled. After genotyping by use of 1000 microsatellite markers, we performed a genome-wide linkage search with variance component analysis. The estimated heritability of HDL cholesterol was 0.45, revealing that HDL cholesterol was under significant genetic influence. We found peak evidence of linkage (LOD score=1.88) for HDL cholesterol level on chromosome 6 (nearest marker D6S1660) and potential evidences for linkage on chromosomes 1, 12 and 19 with the LOD scores of 1.32, 1.44 and 1.14, respectively. These results should pave the way for the discovery of the relevant genes by fine mapping and association analysis.

Characterization of microsatellite markers covering chromosome 1 in the Korean and Japanese populations (한국인과 일본인에서 1번 염색체에 부착되는 microsatellite marker의 특징)

  • Lee, You-Jin;Park, Soo-Byung
    • The korean journal of orthodontics
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    • v.34 no.6 s.107
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    • pp.537-543
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    • 2004
  • Microsatellit markers are considered to be very promising genetic markers for genetic linkage analysis. The majority of the markers are as informative as in Caucasians but there are significant ethnic differences in the genetic variations. In order to investigate the genetic variations in the Korean and Japanese populations and their ethnic differences, 51 microsatellite marker loci spanning the whole human chromosome 1 were arranged from a commercially available set (ABI PRISM Linkage Mapping Set-HD5, Applied Biosystems, Foster City, CA, USA), and then determined the allelic frequencies and heterozygosities for these marker loci in the 90 unrelated Korean subjects and 90 unrelated Japanese subjects. Of all 51 markers tested, significant differences were observed when microsatellite allele frequency pattern of Korean was compared with those of Caucasian, while this pattern was highly similar between Korean and Japanese populations. Our data indicate that an extensive verification of public microsatellite markers in a particular population study should be undertaken prior to their linkage studies. Moreover, this information should facilitate genetic linkage studies of various hereditary diseases, especially in the Koreans and Japanese.

Location and Linkages of Small Firms in the Greater Cincinnati Metropolitan Area, Ohio (소규모 기업의 입지 및 연계구조 관한 연구 -미국 오하이오주 씬씨내티 대도시 지역의 경우-)

  • Lee, Bo-Young
    • Journal of the Korean association of regional geographers
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    • v.5 no.1
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    • pp.121-135
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    • 1999
  • This study investigated the location conditions, spatial linkage structures, and firm specific problems of small firms of the Greater Cincinnati metropolitan area by sectors and by areal distribution. The major locational advantages were closeness to customers and suppliers followed by accessibility to inter-state highways. These results were supported by spatial linkage structures in which within-region linkages occupied a greater portions of linkage, showing the importance of small firms in the regional economy. The linkage patterns showed distance decay effect with high elasticity. While there were no significant differences of locational conditions and spatial linkage structures of small firms between core and peripheral area, a slight difference was identified among sectors. Chemical related manufacturing firms show different locational conditions and spatial linkage structure with weak within-local linkages. The main locational disadvantages were lack of qualified labor, undesirable neighborhood, heavy tax, and space shortage. Considering the biggest problems such as lack of qualified labor, difficulties in sales/marketing, low accessibility to financial resource, and technological inability, the inter-related cooperative business networks among firms and regional institutions, consulting companies, chamber of commerce, and universities are needed to stimulate regional economic development and survival of small firms.

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The Spatial Linkage and Complex Location of Kumi Industrial Complex -The Case of No.1 Industrial Complex- (구미공업단지의 공장입지와 연계 -제1단지의 경우-)

  • Cho, Sung-Ho;Choi, Kum-Hae
    • Journal of the Korean association of regional geographers
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    • v.3 no.1
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    • pp.183-198
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    • 1997
  • This case study was conducted by verification the site characteristics based on the questionnaire and interview obtained from the all factories located at No. 1 developing area in Kumi industrial complex. The site characteristics were presumed from the process of location behavior and spatial linkage. Kumi industrial complex was developed to improve export industry at national levels by providing chief land price and benefiting various tax. Kumi industrial complex which enticed many factories is playing an important role in export industry in Korea. At beginning, the detention of large enterprises promoted the establishment of related small to medium sized factories into the complex. Two distinctive industries. textile and electronic, were reflected by the purpose to establish the complex and industrial characteristics of Taegu city. respectively. In Kumi industrial complex, positive responses on traffic and raw material supply and negative reactions on the environmental impact on social community as well as high labor charge were investigated. Especially the higher labor cost prevented to hire laborers effectively. In the linkages of spatial and raw material, most factories in the complex depended on the availability of out side the Kumi city. For the textile factories, the supply of raw material and parts were relied on Taegu and/or other cities, whereas in electronic factories purchased them mainly from other cities and partly from abroad. Although questionnaire and interview suggested it, most of the parts were supplied by a parts maturing companies on the complex to a few large enterprises. In the marketing linkage, textile factories revealed higher relation-ship with the foreign countries and sewing factories in Korea. On the other hand, electronic factories have strong relation-ships in the marketing linkage to the parts supplying companies in the complex or large-scale resembling companies in other cities. In the textile companies, the right for decision on purchasing raw materials and parts is belonging to the owner whereas mother enterprise usually have the right for the marketing. In the case of the electronic factories, all the purchasing activities are related to the sub-contracting companies. In the service linkage, the Quality of the service created spatial distinction. There was high linkages on inside of Kumi complex for the low grade services such as repairing and installing machines, whereas strong linkages on outside of the complex for the high grade services such as management, law, taxation, new product development. and manufacturing technology. In the linkages of activity on the R&D (research and development), electronic factories do not have sufficiently qualified institutes in the complex. Strong regional linkages in the field of textile and electronic industries revealed limitations of the local industrial complex. In the sub-contracting linkage, high linkage ship within Kumi boundary reflected the characteristics of industrial site in the complex. There, most decisions by the companies centered by the mother enterprise.

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Resources Linkage and Activation Plan in Social Enterprise (사회적기업 자원연계 현황 및 활성화 방안)

  • Lee, Yong-Jae;Kim, Bong-Hwan
    • The Journal of the Korea Contents Association
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    • v.13 no.6
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    • pp.227-235
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    • 2013
  • This study aimed to establishing a support policy for enhancing corporate's competitiveness by analysing the resources linkage status of social enterprise. 67 Social enterprises In Chung-nam area were surveyed. The results are as follows. Social enterprise didn't link with community agencies in area of the capital, product and services outlets, technology development, human resources, infrastructure and education. And social enterprises is linking external resources with public agencies actively in the area of management, PR and marketing. But most social enterprises are operating without the linkage of community organizations. In the future, social enterprises need the network of public, corporate, and private organizations in the community by strengthening the role of the intermediate support organizations.

Study on Ways of Overcoming Obstacles of University-Industry Collaboration in Terms of POB(Positive Organization Behavior) (산학협력의 장애요인 및 극복방안에 관한 연구: POB(Positive Organization Behavior) 관점에서)

  • Hong, Eun Young;Choi, Jong In
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.10 no.5
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    • pp.185-196
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    • 2015
  • In a study of the existing Collaboration, U-I Collaboration linkage(LINK) has a width of the various channels through continuous mutual cooperation by the path-dependency. U-I Collaboration linkage(LINK) through the various channels is more powerful, whereas this increase trade-related barriers. In other words, It has been discussed in many literatures about the U-I Collaboration linkage(LINK). However, relatively a study on the factor of the barrier about U-I Collaboration linkage(LINK) is a minority. Given the importance of policies to establish an association of industry-university cooperation and support system, the lack of research on the obstacles to U-I Collaboration linkage(LINK) will be a serious obstacle for designing effective policies. This paper examines the existing literature about the width of mutual cooperation and the barrier of U-I Collaboration, analyze to lower the barrier of U-I cooperation through POB(Positive Organization Behavior) of university administration. In conclusion, we would like to suggest the policy implications.

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The relationship between organizational climate and resource linkage skills of social workers in community welfare centers: The mediating effect of reflective thinking (지역사회복지관 조직풍토와 사회복지사의 자원연계기술과의 관계: 성찰적 사고의 매개효과)

  • Park, Mijin;Hyun, Anna
    • Korean Journal of Social Welfare Studies
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    • v.48 no.2
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    • pp.203-231
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    • 2017
  • The purpose of this study is to examine the impact of organizational climate on the resource linking skills of social workers working in community welfare centers as well as the mediating effects of reflective thinking in these relationships. To test the mediating effects, we set up a research model based on previous studies on the organizational climate, resource linkage skills, and reflective thinking of social workers. The subjects of this study were social workers in community welfare centers in the Busan metropolitan city. Data were collected using mail surveys, and data from 526 respondents were used for the final analysis. The main results are as follows. First, the organizational climate of community welfare centers has a statistically significant impact on social workers' resource linkage skills. In other words, the more the social workers recognize positively about the organizational climate, the more the utilization of resource linkage skills increases. Second, reflective thinking has a mediating effect in the relationship between the organizational climate and resource linkage skills of social workers in community welfare centers. Based on the study results, practical suggestions for improved resource linkage skills and reflective thinking of social workers in community welfare centers were suggested, and practical implications and future research were discussed.

Mapping of the Porcine Calpastatin Gene and Association Study of Its Variance with Economic Traits in Pigs

  • Choi, B.H.;Lee, J.S.;Jang, G.W.;Lee, H.Y.;Lee, J.W.;Lee, K.T.;Chung, H.Y.;Park, H.S.;Oh, S.J.;Sun, S.S.;Myung, K.H.;Cheong, I.C.;Kim, T.H.
    • Asian-Australasian Journal of Animal Sciences
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    • v.19 no.8
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    • pp.1085-1089
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    • 2006
  • The objectives of this study were to confirm a location of the calpastatin (CAST) gene in chromosome 2 and to detect associations of genetic variations with economic traits in the porcine CAST gene as a candidate gene for growth and meat quality traits in pigs. Calpastatin is a specific endogenous inhibitor of calpains. The calpain protease system is ubiquitous, and is involved in numerous growth and metabolic processes. Three single nucleotide variations were identified within a 1.6 kb fragment of the porcine CAST gene and these polymorphisms were used for genetic linkage mapping. Linkage and QTL mapping were performed with the National Livestock Research Institute (NLRI) reference families using eight microsatellites and SNP makers in the CAST gene. The porcine CAST gene was mapped adjacent to the markers, SW395 and SW1695 on SSC2 with LOD scores of 15.32 and 8.50, respectively. According to the QTL mapping, a significant association was detected at 82 cM between SW395 and CAST-Hinf I for weight at the age of 30 weeks. In addition, an association study was performed with the $F_2$ animals of NLRI reference families for Hinf I, Msp I and Rsa I polymorphisms in the CAST gene. Two polymorphisms, CAST-Rsa I and CAST-Hinf I, showed significant correlation for growth traits at p<0.01 and p<0.05, respectively.