Subjects: Library Science，Information Science >> Library Science submitted time 2023-08-26 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] Considering the inconsistency among the existing empirical findings of influencing factors of knowledge sharing intensions and behavior in online community, the related empirical researched are reviewed and re-analyized.[Method/process] After collecting the related empirical researches, this meta-analysis method is used to identify the determinants of individuals knowledge sharing intentions and behaviors in online communities. Moreover, by means of heterogeneity test and group analysis, this paper also explores the moderating factors affecting the effectiveness of different factors on knowledge sharing behavior, which caused the inconsistency among them.[Result/conclusion] This study concluded that 10 and 14 variables identified in this paper positively contribute to knowledge sharing intentions and behavior, respectively. Among all these antecedents, altruism and attitude toward knowledge sharing are the two strongest factors influencing on the knowledge sharing intention. And outcome expectation, common language, subjective norm and identify have the strongest relationship with knowledge sharing behavior. It was indicated as well that community types and research contexts are identified as two moderators of knowledge sharing intention or behavior and its factors, which can partially explain the inconsistentcy problem. By combing and identifying the antecedents and their moderating factors of knowledge sharing intentions and behavior, this meta-analysis study can be a guidance for online community managers and provide a better theoretical basis for follow up researches in this field.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/Significance] The main approach adopted in most information retrieval systems currently is to present the search results list linearly based on the relevance score. Although existing researches have theoretically criticized the limitations of this approach, proposing that there is mutual influence between the document previously examined and read, there is no empirical study to further investigate the contextual factors affecting the order effect of relevance judgment. [Method/Process] In response to this question, this paper adopted the 2X2X2 inter-subject experiment method by recruiting 80 subjects. Each subject was required to complete 4 experimental tasks with different topics. Data was collected by questionnaires before and after each experimental task was completed. In order to explore the order effect of relevance judgment and the influence of inter-document relationships as well as the document presentation types as contextual factors, the collected data was analyzed using various methods, such as chi-square test, law of total probability violation, QQ equation, etc. [Result/Conclusion] The research results confirm that the judgment of relevance can be affected by the presentation order of the documents and this effect is different according to the relationships between documents and document presentation types. Specifically, compared to documents with complementary relationships, the order of documents with contradictory relationship is more likely to influence the relevance judgment. In addition, compared with the full text, the order of the presentation of literature snippets is more likely to affect the relevance judgment. Although this paper has its limitations, the research conclusions obtained have certain theoretical, practical and methodological enlightenment.
Subjects: Biology >> Zoology submitted time 2017-11-07 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲粮添加粪肠球菌对蛋鸡生产性能、蛋品质、脂质代谢和肠道微生物数量的影响。选择137日龄海兰褐壳蛋鸡450只，随机分成5个组，每组6个重复，每个重复15只鸡，分别饲喂在基础饲粮中添加0、1.0×104、1.0×106、1.0×108和1.0×1010 CFU/g粪肠球菌（CGMCC1.2135T）的试验饲粮。试验期168 d。结果显示：1）试验第113~140天、第141~168天，1.0×106 CFU/g粪肠球菌添加组蛋鸡的产蛋量极显著高于对照组和其他粪肠球菌添加组（P<0.01）。试验第141~168天，1.0×104 CFU/g粪肠球菌添加组的料蛋比显著低于1.0×108 CFU/g粪肠球菌添加组（P<0.05）。2）试验第56天，各粪肠球菌添加组的蛋壳厚度均显著高于对照组（P<0.05），对照组和1.0×106 CFU/g粪肠球菌添加组的蛋白高度显著高于1.0×104和1.0×1010 CFU/g粪肠球菌添加组（P<0.05）；试验第84天和第140天，1.0×108 CFU/g粪肠球菌添加组的蛋白高度显著高于1.0×104 CFU/g粪肠球菌添加组（P<0.05）。试验第56天，1.0×106 CFU/g粪肠球菌添加组的哈夫单位极显著高于1.0×104和1.0×1010 CFU/g粪肠球菌添加组（P<0.01）；试验第84天，1.0×106和1.0×108 CFU/g粪肠球菌添加组的哈夫单位显著高于1.0×104 CFU/g粪肠球菌添加组（P<0.05）。试验第28天，1.0×1010 CFU/g粪肠球菌添加组的蛋黄颜色极显著高于对照组和1.0×104 CFU/g粪肠球菌添加组（P<0.01）；试验第56天，1.0×104、1.0×106和1.0×1010 CFU/g粪肠球菌添加组的蛋黄颜色极显著高于对照组（P<0.01）；试验第112天，各粪肠球菌添加组的蛋黄颜色均极显著高于对照组（P<0.01），且1.0×108 CFU/g粪肠球菌添加组的蛋黄颜色极显著高于1.0×106 CFU/g粪肠球菌添加组（P<0.01）；试验第140天，1.0×108 CFU/g粪肠球菌添加组的蛋黄颜色极显著高于对照组（P<0.01），而1.0×1010 CFU/g粪肠球菌添加组蛋黄颜色极显著低于对照组和其他粪肠球菌添加组（P<0.01）。3）试验第56天和第112天，1.0×108 CFU/g粪肠球菌添加组蛋鸡的蛋黄总胆固醇含量极显著低于对照组、1.0×104和1.0×106 CFU/g粪肠球菌添加组（P<0.01）。与对照组相比，饲粮添加粪肠球菌显著或极显著降低试验第84天的血清总胆固醇（P<0.01）、低密度脂蛋白胆固醇含量（P<0.01）和第168天的血清甘油三酯含量（P<0.05）。4）1.0×106、1.0×108和1.0×1010 CFU/g粪肠球菌添加组的回肠大肠杆菌数量显著低于对照组（P<0.05）；空肠大肠杆菌数量随粪肠球菌添加水平的增加呈线性降低（P<0.05）。1.0×1010 CFU/g粪肠球菌添加组的回肠粪肠球菌数量极显著高于对照组、1.0×104和1.0×108 CFU/g粪肠球菌添加组（P<0.01）；1.0×108和1.0×1010 CFU/g粪肠球菌添加组的盲肠粪肠球菌数量极显著高于对照组（P<0.01）。结果表明，饲粮添加粪肠球菌能提高蛋鸡的产蛋量、蛋白高度和蛋黄颜色，降低血清和蛋黄的总胆固醇含量，调节肠道微生物数量；粪肠球菌在蛋鸡饲粮中的适宜添加量为1.0×106或1.0×108 CFU/g。
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