气候·人类·地球

随着工业化进程脚步的加快,现代化痕迹遍布生活的每个角落,同时人类也不得不面临现代化生产给自然气候带来的不容忽视的严重影响。我们在渐渐失去冬天……     

Hirsch-type characteristics of the tail of distributions. The generalised h-index

In this paper a generalisation of the h-index and g-index is given on the basis of non-negative real-valued functionals defined on subspaces of the vector space generated by the ordered samples. Several Hirsch-type measures are defined and their basic properties are analysed. Empirical properties are illustrated using examples from the micro- and meso-level. Among these measures, the h-index proved the most, the arithmetic and geometric g-indices, the least robust measures. The μ-index and the harmonic g-index provide more balanced results and are still robust enough.     

Genuine Religious Tolerance: Is It a Thing of the Past in Public Schools?

The so-called Culture Wars have made the issue of religious tolerance in schools more confusing than ever. Where once free speech trumped nearly every concern in these wars in the public schools, there is now great concern about whether messages put out are politically correct. The preoccupation teachers now have with avoiding speech or themes likely to get them into trouble has led to a new form of censorship. The authors explain that free speech in the educational forum requires respect for every earnest attempt to get at a legitimate truth claim. In matters religious, this epistemic openness is no longer respected. The argument below does not encourage teachers to engage in debate among students in matters religious, or even to encourage it. Nor are the arguments below aimed at introducing religious discourse as a means of developing skills of critical thinking as the feminist, moral philosopher Nel Noddings has previously recommended. The argument simply concludes with the modest recommendation that teachers be more conscientious about indirectly censoring or trivializing student religious speculations.     

Beware of Stereotypes: Are Classmates’ Stereotypes Associated With Students’ Reading Outcomes?

This study examined the associations between classmates’ reading-related gender stereotypes and students’ reading self-efficacy, self-concept, motivation, and achievement. Our sample consisted of 1,508 fifth-grade students (49% girls; age: 10.89 years); data were collected at two time points. Multilevel analyses yielded two main results: First, there was a relation between students’ individual reading-related gender stereotypes and their reading self-concept, self-efficacy, and motivation with boys experiencing negative and girls experiencing positive effects. Second, a contextual effect was found: after controlling for students’ individual reading-related gender stereotypes, classmates’ gender stereotypes were negatively related to all of the boys’ reading outcomes. The results provide evidence for the assumption that classmates are important communicators of gender stereotypes and that they reinforce conforming behaviors.