• Title/Summary/Keyword: model factor

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Evaluation of a New Fine-mapping Method Exploiting Linkage Disequilibrium: a Case Study Analysing a QTL with Major Effect on Milk Composition on Bovine Chromosome 14

  • Kim, JongJoo;Georges, Michel
    • Asian-Australasian Journal of Animal Sciences
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    • v.15 no.9
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    • pp.1250-1256
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    • 2002
  • A novel fine-mapping method exploiting linkage disequilibrium (LD) was applied to better refine the quantitative trait loci (QTL) positions for milk production traits on bovine chromosome 14 in the pedigree comprising 22 paternal half-sib families of a Black-and-White Holstein-Friesian grand-daughter design in the Netherlands for a total of 1,034 sons. The chromosome map was constructed with the 31 genetic markers spanning 90 Kosambi cM with the average inter-marker distance of 3.5 cM. The linkage analyses, in which the effects of sire QTL alleles were assumed random and the random factor of the QTL allelic effects was incorporated into the Animal Model, found the QTL for milk, fat, and protein yield and fat and protein % with the Lod scores of 10.9, 2.3, 6.0, 25.4 and 3.2, respectively. The joint analyses including LD information by use of multi-marker haplotypes highly increased the evidence of the QTL (Lod scores were 25.1, 20.9, 11.0, 85.7 and 17.4 for the corresponding traits, respectively). The joint analyses including DGAT markers in the defined haplotypes again increased the QTL evidence and the most likely QTL positions for the five traits coincided with the position of the DGAT gene, supporting the hypothesis of the direct causal involvement of the DGAT gene. This study strongly indicates that the exploitation of LD information will allow additional gains of power and precision in finding and localising QTL of interest in livestock species, on the condition of high marker density around the QTL region.

Association of a Single Codon Deletion in Bone Morphogenetic Protein 15 Gene with Prolificacy in Small Tail Han Sheep

  • Guo, W.;Chu, M.X.;Deng, X.M.;Feng, J.D.;Li, Ning;Wu, Changxin
    • Asian-Australasian Journal of Animal Sciences
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    • v.17 no.11
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    • pp.1491-1495
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    • 2004
  • Small Tail Han Sheep has significant characteristics of high prolificacy and non-seasonal ovulatory activity and is an excellent local sheep breed in P. R. China. Recently a novel member of the transforming growth factor $\beta$ (TGF$\beta$) superfamily termed bone morphogenetic protein 15 (BMP15) was shown to be specifically expressed in oocytes and to be essential for female fertility. Therefore, BMP15 is a candidate gene for reproductive performance of Small Tail Han Sheep. The whole genomic nucleotide sequence of BMP15 gene in Small Tail Han Sheep was searched for polymorphisms by PCR-SSCP and direct sequencing, and only one polymorphism was found. The polymorphism was a result of a 3 base pair deletion, which eliminated a single Leu codon (CTT). The allelic frequencies for A (without deletion) and B (with a codon deletion) are 0.73 and 0.27 respectively. The effects of BMP15 genotype on litter size were evaluated using the least squares model. This indicated that there was a significant association between litter size of Small Tail Han Sheep and a deletion in BMP15 gene (p=0.02<0.05). Small Tail Han Sheep ewes with AA and AB genotype produce on average 0.5 and 0.3 more lambs per litter than those ewes with BB genotype.

CHEK2 1100delC Variant and Breast Cancer Risk in Caucasians: A Meta-analysis Based on 25 Studies with 29,154 Cases and 37,064 Controls

  • Yang, Yuan;Zhang, Fan;Wang, Yang;Liu, Sheng-Chun
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.7
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    • pp.3501-3505
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    • 2012
  • Links between the CHEK2 1100delC heterozygote and breast cancer risk have been extensively explored. However, both positive and negative associations with this variant have been reported in individual studies. For a detailed assessment of the CHEK2 1100delC heterozygote and breast cancer risk, relevant studies published as recently as May 2012 were identified using PUBMED and EMBASE and selected using a priori defined criteria. The strength of the relationship between the CHEK2 1100delC variant and breast cancer risks was assessed by odds ratios (ORs) under the fixed effects model. A total of 29,154 cases and 37,064 controls from 25 case-control studies were identified in this meta-analysis. The CHEK2 1100delC heterozygote was more frequently detected in cases than in controls (1.34% versus 0.44%). A significant association was found between CHEK2 1100delC heterozygote and breast cancer risk (OR=2.75, 95% CI: [2.25, 3.36]). The ORs and CIs were 2.33 (95% CI: [1.79, 3.05]), 3.72 (95% CI: [2.61, 5.31]) and 2.78 (95% CI: [2.28, 3.39]) respectively in unselected, family, early-onset breast cancer subgroups. The CHEK2 1100delC variant could be a potential factor for increased breast cancer risk in Caucasians. However, more consideration is needed in order to apply it to allele screening or other clinical work.

Targeting EGFL7 Expression through RNA Interference Suppresses Renal Cell Carcinoma Growth by Inhibiting Angiogenesis

  • Xu, Han-Feng;Chen, Lei;Liu, Xian-Dong;Zhan, Yun-Hong;Zhang, Hui-Hui;Li, Qing;Wu, Bin
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.7
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    • pp.3045-3050
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    • 2014
  • Renal cell carcinoma (RCC) is the most lethal of all urological cancers and tumor angiogenesis is closely related with its growth, invasion, and metastasis. Recent studies have suggested that epidermal growth factor-like domain multiple 7 (EGFL7) is overexpressed by many tumors, such as colorectal cancer and hepatocellular carcinoma; it is also correlated with progression, metastasis, and a poor prognosis. However, the role of EGFL7 in RCC is not clear. In this study, we examined how EGFL7 contributes to the growth of RCC using a co-culture system in vitro and a xenograft model in vivo. Downregulated EGFL7 expression in RCC cells affected the migration and tubule formation of HMEC-1 cells, but not their growth and apoptosis in vitro. The level of focal adhesion kinase (FAK) phosphorylation in HMEC-1 cells decreased significantly when co-cultured with 786-0/iEGFL7 cells compared with 786-0 cells. After adding rhEGFL7, the level of FAK phosphorylation in HMEC-1 cells was significantly elevated compared with phosphate-buffered saline (PBS) control. However, FAK phosphorylation was abrogated by EGFR inhibition. The average size of RCC local tumors in the 786-0/iEGFL7 group was noticeably smaller than those in the 786-0 cell group and their vascular density was also significantly decreased. These data suggest that EGFL7 has an important function in the growth of RCC by facilitating angiogenesis.

A Study on the Export Growth Factors of the SM Ventures (중소벤처기업의 수출성장 요인분석 연구)

  • Park, Woo-Sik;Kim, Dae-Ho
    • 한국벤처창업학회:학술대회논문집
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    • 2006.11a
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    • pp.197-217
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    • 2006
  • Korea economy's latent growth rate has already been decreased about 4%. During 1983-1989, the latent growth rate was 8%, before the foreign exchange crisis, 1990-1997 was 6.7%, and during $2000{\sim}2004$, it had been decreased 4.4%. The latent growth rate means economy growth rate which one nation can achieve capital, labor, and factors as applying these. Our economy growth rate was 8% in 1980s, but it had been decreased about 6.7% during $1990{\sim}1997$, after 2000, it remarkably decreased 4.8% which shows weakness of our economy's strength. This study attempts to investigate about export growth factor of venture company in our nation's growth that depends on export. This thesis studied the companies continuance and growth in external environment's regular correlation and casual relationship which surround company's factors and internal. Also, the external environment, which surrounds company, can be thought that company can't control itself, so that the company's continuance and growth can be decided because of its internal primary factors. This thesis establishes and analyzes the study model that how factors can affect to company's growth.

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The Effects of Experiential Value on Brand Equity - Focus on Kitsch Product of Luxury Brands - (소비자의 경험적 가치가 브랜드 자산에 미치는 영향 연구 - 럭셔리브랜드의 키치제품을 중심으로 -)

  • Chae, Heeju;Ko, Jeonmi;Ko, Eunju
    • Journal of the Korean Society of Costume
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    • v.66 no.2
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    • pp.45-60
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    • 2016
  • As a method to satisfy needs and emotions of consumers who pursue diversity, the use of Kitsch in the fashion industry has been increased. Previous studies on Kitsch fashion have focused on qualitative research on the characteristics of Kitsch product, and little empirical researches have been conducted on consumer attitude such as consumer response to Kitsch products and brand equity. Therefore, the purpose of this study are 1) to investigate comparisons of experiential values (i.e., Aesthetic, Amusing, Cultural) with Kitsch product moderated by consumers' characteristics (i.e., consumer uniqueness, fashion involvement), and 2) to explore the relationship between experiential values and brand equity. Factor analysis, reliability analysis, ANOVA, and structural equation model using SPSS 18.0 and AMOS 18.0 were used for the data analysis. 210 questionnaires were analyzed for this study. The results of this study were as follows. First, significant difference in aesthetic values of Kitsch products were shown. Kitsch Product with nostalgic characteristics has higher aesthetic values than others. Specifically differences in experiential values with Kitsch product were partially moderated by consumers' characteristics (i.e., consumer uniqueness, fashion involvement), Second, cultural value had a positive influence on brand awareness, while amusing and cultural values had a positive influence on brand image. Also aesthetic and amusing values had a positive influence on brand loyalty. Academic and business implications were discussed from this study.

A Study on the Buying Behavior of Fashion Products in the Group Buying Type of Social Commerce - Focused on Shopping Value, Attitude, Purchase Intention, and Clothing Involvement - (공동구매형 소셜커머스를 통한 패션제품 구매행동 연구 - 쇼핑가치, 태도, 구매의도, 의복관여도를 중심으로 -)

  • Cho, Yunjin;Seo, Sangwoo
    • Journal of the Korean Society of Costume
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    • v.62 no.8
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    • pp.134-148
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    • 2012
  • Social commerce is not only a new form of shopping malls that did not exist in the past, but also a new form of media as it gets combined with social networking services. The purpose of this study is to analyze the influence of clothing involvement on the relationship between shopping values, attitudes, and purchase intentions of consumers in the group-buying type of social commerce. A specialized Internet survey company carried out the survey targeting consumers in their 20s and 30s with experience of purchasing fashion products using group-buying type of social commerce. A total of 200 questionnaires were used for the final analysis. Descriptive statistics, factor analysis, t-test, and regression analysis were conducted by using SPSS 12.0 and AMOS 19.0. The results are as follows. First, diversity/informativeness, impulse/accumulation, price, convenience, reliability, interaction, and adventure were identified as shopping value dimensions. Second, especially in cases of diversity/informativeness, price, and interaction, there were significant differences between the high involvement group and the low involvement group. Third, five of the categories, which were diversity/informativeness, price, convenience, reliability, and interaction, had significant influence on attitude and purchase intention. When the attitude variable was included with shopping value as independent variables in the regression model to predict purchase intention, the attitude variable presented a full mediating effect or a partial mediating effect between shopping value and purchase intention. Also, the relationship among shopping value, attitude, and purchase intention was different to some degree according to the level of consumer clothing involvement.

Analysis on Pedestrian Behavior Focused on Waiting Time and Trial Frequency for Crossing in the Unsignalized Intersection (비신호 교차로에서 횡단 기다림 시간 및 시도횟수에 관한 보행행태 연구)

  • Jang, Tae Youn;Oh, Do-Hyoung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.35 no.2
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    • pp.427-436
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    • 2015
  • This study analyzes the factors effecting on pedestrian crossing behavior in the unsignalized intersection. Pedestrian crossing behavior is the results of mental stress defined as a combination of environment perception, avoiding accidents, halting collision, and instant crossing decision. It is necessary to make walkable intersection in cities through relieving this stress influenced by personality, traffic condition, and roadway environment. The purpose of study is empirically to examine the crossing behavior such as crossing satisfaction, crossing trial frequency and waiting time based on various factors effecting on crossing intersection by video and questionnaire survey. The $x^2$-test is applied to analyze the characteristics of crossing trial frequency according to each factor. Also, the hazard rate model is established to find the factors effecting on waiting time for crossing. Finally, the direct and indirect effects on the pedestrian crossing satisfaction are presented as the results of LISREL.

Investigation of influence of homogenization models on stability and dynamic of FGM plates on elastic foundations

  • Mehala, Tewfik;Belabed, Zakaria;Tounsi, Abdelouahed;Beg, O. Anwar
    • Geomechanics and Engineering
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    • v.16 no.3
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    • pp.257-271
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    • 2018
  • In this paper, the effect of the homogenization models on buckling and free vibration is presented for simply supported functionally graded plates (FGM) resting on elastic foundation. The majority of investigations developed in the last decade, explored the Voigt homogenization model to predict the effective proprieties of functionally graded materials at the macroscopic-scale for FGM mechanical behavior. For this reason, various models have been used to derive the effective proprieties of FGMs and simulate thereby their effects on the buckling and free vibration of FGM plates based on comparative studies that may differ in terms of several parameters. The refined plate theory, as used in this paper, is based on dividing the transverse displacement into both bending and shear components. This leads to a reduction in the number of unknowns and governing equations. Furthermore the present formulation utilizes a sinusoidal variation of displacement field across the thickness, and satisfies the stress-free boundary conditions on the upper and lower surfaces of the plate without requiring any shear correction factor. Equations of motion are derived from Hamilton's principle. Analytical solutions for the buckling and free vibration analysis are obtained for simply supported plates. The obtained results are compared with those predicted by other plate theories. This study shows the sensitivity of the obtained results to different homogenization models and that the results generated may vary considerably from one theory to another. Comprehensive visualization of results is provided. The analysis is relevant to aerospace, nuclear, civil and other structures.

I Do Not Even Say "It" - a Mixed Methods Study on Breast Cancer Awareness of Omani Women

  • Alkhasawneh, Esra;Siddiqui, Saad T;Leocadio, Michael;Seshan, Vidya;Al-Farsi, Yahya;Al-Moundhri, Mansour S
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.4
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    • pp.2247-2254
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    • 2016
  • Background: The incidence of breast cancer is rising in Oman, and the disease is diagnosed at late stages, when treatment success is limited. Omani women might benefit from better awareness, so that breast cancer can be detected early and treated. This study was conducted to assess Omani women's levels of breast cancer awareness and early detection practice, and explore factors which might influence these levels. Materials and Methods: A mixed methods study was conducted in 2014, including a quantitative survey of 1,372 and a qualitative assessment of 19 Omani women, aged ${\geq}20years$ from five Omani governorates using convenient sampling. Demographic information and scores for awareness levels were used in a multivariate regression model to investigate factors associated with awareness. Thematic analysis and interpretive description were used to analyse the qualitative data. Results: The overall means for early detection and general awareness scores were 0.58 (SD 0.24) and 0.46 (SD 0.21), respectively. General awareness was significantly associated with age, education, income and familiarity with cancer patients (p<0.05), while early detection was significantly associated with age, marital status and education. A majority of women (59.5%) agreed with a belief in 'evil eye' or envy as a risk factor for breast cancer. Women discussed various factors which may empower or inhibit awareness, including the cultural-religion-fatalistic system, personal-familial-environmental system, and healthcare-political-social system. Conclusions: The overall low scores for awareness and early detection, and the survey of local beliefs highlight a severe necessity for a contextually-tailored breast cancer awareness intervention programme in Oman.