Transnationalism, Mobility and Identity: the Making of Place in Flushing, New York City

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The Sustainable Development of Street Texture of Historic and Cultural Districts―A Case Study in Shichahai District, Beijing

This paper explores the sustainable development of historic and cultural districts based on the case study of the Shichahai District in Beijing, China. By using the space syntax method, this paper traces the changing street texture of the Shichahai District during the Yuan period, the Ming period, the Qing period, and the current period. It attempts to examine (1) the characteristics of the traditional street structure of Old Beijing; (2) the major changes of street fabric and their causes during the historical periods; and (3) the impacts of modern land use pattern on urban street structure. This research finds that the main street texture remains relatively stable in the Shichahai District. However, the increasing dependence on cars in Beijing decreases street vitality in general. But the combination of pedestrian and community-level commercial streets helps enhancing the liveliness of historic and cultural districts, which further promotes the preservation and development of these neighborhoods

Single-cell transcriptome sequencing reveals the mechanism regulating rice plumule development

Seed plumules comprise multiple developing tissues and are key sites for above-ground plant organ morphogenesis. Here, the spatial expression of genes in developing rice seed plumules was characterized by single-cell transcriptome sequencing in Zhongjiazao 17, a popular Chinese indica rice cultivar. Of 15 cell clusters, 13 were assigned to cell types using marker genes and cluster-specific genes. Marker genes of multiple cell types were expressed in several clusters, suggesting a complex developmental system. Some genes for signaling by phytohormones such as abscisic acid were highly expressed in specific clusters. Various cis-elements in the promoters of genes specifically expressed in cell clusters were calculated, and some key hormone-related motifs were frequent in certain clusters. Spatial expression patterns of genes involved in rapid seed germination, seedling growth, and development were identified. These findings enhanced our understanding of cellular diversity and specialization within plumules of rice, a monocotyledonous model crop