拓展型Horava引力的解

文章研究了一种新的修改型 Horava引力的静态球对称解,通过求解场方程得到一些限制类解。这些解的奇异性结构和一些诸如红移的物理量在文中有所讨论,同时用图表来探讨了相关的度规函数。     

一种链路质量知晓的多跳无线网络路由度量

在目前的多跳无线网络中,路由协议多采用路由跳数作为路由选择的依据.这种基于跳数的度量倾向于选择较长距离的链路,但链路质量却很差,这势必会影响到平均网络吞吐量.本文提出了一种链路质量知晓的多跳无线网络路由度量.这种新的路由度量兼顾了路由跳数和链路质量.从仿真结果可以看出,采用我们提出的路由度量比采用跳数度量平均网络吞吐量提高了12%.     

The Educators’ Attitudes Toward Disability Scale (EADS): A Pilot Study

This article presents the Educators’ Attitudes toward Disability Scale (EADS). This scale was developed from the Social Workers Attitudes toward Disability Scale (SWADS). A sample of 128 postsecondary educators from one college and one university in Ontario, Canada completed the EADS, the Attitudes toward Disabled Persons scale (ATDP), and a demographic questionnaire. Confirmatory factor analysis was employed to verify that the subscales from the original SWADS (i.e. affect, behaviour/practice, and cognition) were present in the EADS. Pearson’s correlation was also calculated between the scores on the Attitudes Toward Disabled Persons-Form B (ATDP-B) and the EADS as a measure of validity. Finally, Cronbach’s alpha was calculated for the purpose of internal reliability among the items in the EADS. Preliminary findings suggest that the EADS may be a valid and reliable instrument, but measures attitudes unidimensionally.     

广义相对论中的时空度量和光速

爱因斯坦引力几何化的思想是解决引力本质问题的关键,从而广叉相对论中的时空度量问题就是实现这一思想的核心问题;关于广义相对论中是否存在有如狭义相对论那样的"光速不变"问题,往往有着不同的说法,在此给出了说明.