How does education have an impact on ethnocentrism? A structural equation analysis of cognitive,occupational status and network mechanisms

Previous studies have distinguished cognitive, occupational status and network mechanisms in the relation between education and ethnocentrism. Hypotheses on these mediating mechanisms are derived from socialization theory, realistic group threat and contact theory. In the current study we use structural equation modeling to investigate the explanatory power of these three mechanisms simultaneously. The analysis is based on a representative population survey from the Netherlands (NELLS 2009, n = 1910). The results show that more than half of the initial association between education and ethnocentrism can be attributed to cognitive ability and occupational status mechanisms. The remaining part of the overall association, however, still has to be modeled as a direct relationship between education and ethnocentrism. This direct association can be attributed either to social desirability or to a direct liberalizing effect of education on social and political attitudes. Our analysis tentatively suggests that the rise of average education levels in Western societies might lead to less ethnocentric attitudes via the cognitive sophistication mechanism.     

n元二次型特征方程的求法

给出了求n元二次型特征方程的一个重要定理,用代数方法解决了几何问题,并给出几个应用实例。     

二次不定方程3f2+3fg+g2=h2的正整数解

本文研究了二次不定方程3f^2＋3fg＋g^2=h^2给出了其所有正整数解公式.对于特例g=1和g=2利用Pell方程v2-3u2=1及不定方程3u^2-v^2=2的正整数解公式分别得到了原方程成为二元不定方程时的所有正整数解.     

求解非线性伏尔泰拉积分方程的有限差分方法

研究一类典型的伏尔泰拉积分方程的数值求解方法.通过数值差分离散积分方程,然后将积分方程演化为非线性代数方程组,通过迭代推进求解此类积分方程.分析这种求解方法的代数精度,证明此数值解法的精度高达Δt²阶,可以满足工程计算需要.通过数值仿真验证,数值解与解析解的误差为10^-5.如果采用更高阶的数值积分离散方式,可以获得更高阶精度.     

带Hardy-Sobolev临界指数和权函数的半线性椭圆问题的非平凡解

借助环绕定理和非线性分析技巧,研究如下一类带Hardy-Sobolev临界指数和权函数的半线性椭圆方程 - Δ u-μ u |x|² =λu+K(x) |u|^2*(s)-2u |x|^s , x∈Ω; u=0, x∈Ω, 解的存在性,其中Ω是 R ^<em>N具有光滑边界的有界开区域,0∈Ω,N≥5,0≤s≤2, 0≤μ≤ N-2 2 ², λ>０,K(x)是 上有界正函数.     

Coaching competency and satisfaction with the coach: A multi-level structural equation model

Abstract

The purpose of this initial predictive validity study was to determine the ability of measures derived from the Athletes' Perceptions of Coaching Competency Scale II – High School Teams (APCCS II-HST) to predict satisfaction with the head coach. Specification of the statistical model was informed by the mediational model of coach–athlete interactions. The technical quality of the satisfaction measure was evaluated before testing the predictive validity of the coaching competency measures. Data were collected from athletes of seven sports. Athlete observations (N = 748) were clustered within teams (G = 74). Multi-group confirmatory factor analyses (CFA) provided evidence for factorial invariance of a reduced version of the satisfaction measure by athlete gender. Multi-level CFA provided evidence of model–data consistency for a reduced version of the satisfaction measure. Multi-level structural equation modelling provided evidence for the ability of latent coaching competency to positively predict latent satisfaction at both the athlete level (technique competency and motivation competency) and the team level (coaching competency) and for close model–data fit. Implications of this study include: that the APCCS II-HST should be viewed as a replacement for the Coaching Competency Scale when the intended population is appropriate; a preliminary multi-level measurement model for satisfaction with one's coach that should be considered as a potential starting point in subsequent studies; and empirical support for a key relationship proposed in the mediational model of coach–athlete interactions.     

基于结构方程模型的体育类本科毕业论文质量评审指标研究

结合体育类本科教育的特点,利用结构方程模型（SEM）理论和软件AMOS7.0效应分析,构建了体育类本科毕业论文质量评审指标模型,得到了该模型的4个维度和15个观测指标的标准化负荷系数,从而计算出了各指标的权重系数,该评审指标模型为体育类本科毕业论文质量评审提供了一个新思路.     

大学生肺活量与身体素质相关性研究

本研究通过对2239名大学生进行肺活量、50米、立定跳远、握力、坐位体前屈、男1000米、女800米和仰卧起坐项目测试,采用数理统计、相关性、多元逐步回归分析等研究方法,建立大学生肺活量回归方程：男生肺活量（mL）=2949.95（mL）+26.67×握力（Kg）+5.52×坐位体前屈（cm）;女生肺活量（mL）=1913.40（mL）+18.03×握力（Kg）+2.34×立定跳远（cm）+3.29仰卧起坐（个）。     

休闲体育参加者的休闲动机与主观幸福感的关系

采用"休闲动机"、"畅"、"休闲满意度"、"主观幸福感"调查问卷,运用项目分析、因子分析、相关关系分析和构建结构方程模型的方法,对中国图们江区域休闲体育参加者的休闲动机、"畅"、休闲满意度、主观幸福感进行相关关系分析、回归路径分析、验证结构模型验证。首先,通过对各变量之间的因子分析,对未能满足要求的题项进行删除,最终构成其基本框架;其次,休闲动机除情感之间的一些变量并不存在显著的正相关关系外,与"畅"、休闲满意度、生活满意度均存在着显著的正相关关系。"畅"与休闲满意度和生活满意度、生活满意度与休闲满意度各因子之间也存在正相关关系。再次,休闲动机与"畅"、休闲满意度、主观幸福感均具有显著的相互预测作用;"畅"与休闲满意度、主观幸福感也存在显著的相互预测作用;休闲满意度中环境、社会、心理等满意度均与主观幸福感存在显著的相互预测作用,但其余指标均没有直接预测作用。最后,有效验证了中国图们江区域休闲体育参加者的休闲动机与主观幸福感的关系。经过多次模型修正,得到休闲体育参加者的休闲动机与主观幸福感的关系最终模型。     

新媒体环境下用户信息交互意愿影响因素与实证——以汽车新媒体为例

[目的/意义]随着新媒体技术的快速发展,利用新媒体平台与用户进行信息交互成为很多企业或组织了解用户需求和获取消费行为规律的新渠道,在信息交互过程中哪些因素影响到用户的交互意愿对企业有效服务消费者和挖掘消费者需求有重大的意义。[方法/过程]以用户感知价值接受模型为基础,基于信息生态理论建立新媒体环境下用户信息交互意愿的影响因素概念模型,并以汽车行业新媒体交互平台为研究样本,通过问卷调查和结构方程进行实证研究以验证模型的有效性。[结果/结论]数据结果表明,外部变量对新媒体信息交互意愿影响因素的大小依次为感知易用性、感知价值、信息有用性和感知风险。其中,感知易用性、感知价值、信息有用性对交互意愿产生正向影响,感知风险对交互意愿产生负向影响;在感知价值分析中,社会娱乐性对感知价值产生正向影响,信息感知成本对感知价值产生负向影响。本研究可以帮助新媒体信息服务平台更好完善与用户的信息交互功能,对新媒体平台健康发展起到一定的指导作用。