Detecting the core of a network by the centralities of the nodes

Many networks exhibit the core/periphery structure.Core/periphery structure is a type of meso-scale structure that consists of densely connected core nodes and sparsely connected peripheral nodes.Core nodes tend to be well-connected,both among themselves and to peripheral nodes,which tend not to be well-connected to other nodes.In this brief report,we propose a new method to detect the core of a network by the centrality of each node.It is discovered that such nodes with non-negative centralities often consist in the core of the networks.The simulation is carried out on different real networks.The results are checked by the objective function.The checked results may show the effectiveness of the simulation results by the centralities of the nodes on the real networks.Furthermore,we discuss the characters of networks with the single core/periphery structure and point out the scope of the application of our method at the end of this paper.

The Pedagogy of Place in China's Migrant Community

Purpose:This article examines the curriculum and pedagogy of place for migrant children in China and advocates the recognition of migrant families'and communities'knowledge as neces-sary,relevant,and impactful curriculum.Design/Approach/Methods:This article is based on a longitudinal qualitative study conducted in various migrant settlements in Beijing.Data were collected from in-depth interviews with migrant parents,teachers,and community activists and participant observations in schools,com-munity meetings,and other gatherings in the communities.Data were coded on themes related to place-based connection,attachment,and belonging and then analyzed.Findings:Findings demonstrate that pedagogical practices can be developed to re-center the knowledge and experiences of Chinese migrant communities.This pedagogical work recognizes and reflects the undervalued and unrecognized knowledge of migrant communities while investi-gating the meaning of“place”for migrant children.OriginalityNalue:This is the first study putting special emphasis on the discussion of what“place”means for migrants and what knowledge is worthwhile for their children in China.A key contribution of this article is that it documents the challenges and benefits of creating a place-based curriculum and pedagogy for migrant children as they construct a sense of belonging.