A link density clustering algorithm based on automatically selecting density peaks for overlapping community detection

Peer reviewedPostprin

Hong Kong's Growing Separatist Tendencies against China's Rise: Comparing Mainland and Hong Kong College Students' National Identities

Why have separatist sentiments increased in Hong Kong despite of China’s growing economic attractiveness? This question is critical for China–Hong Kong relations. However, few studies have explored it from a comparative perspective. This study compares Hong Kong and mainland college students’ national identities by making a series of interlocked surveys and interviews from 2012 to 2016. It shows that Hong Kong students have a much lower sociopolitical identity with China, which proves to be the primary cause for their separatist tendencies. Although they hold a comparably strong pan-Chinese economic identity, it does not strengthen their sociopolitical identity as it does for mainland students. This can be attributed to their post-materialist framework through which they are unlikely to believe that economic development alone can bring sociopolitical improvements. The findings imply that China faces serious difficulties in turning its economic strength into political charm in societies with strong post-materialist values

High-throughput screening of coherent topologically close-packed precipitates in hexagonal close-packed metallic systems

The nanoscale, coherent topologically close-packed (TCP) precipitate plates in magnesium alloys are found beneficial to the strength and creep resistance of alloys. However, the conventional trial-and-error method is too time-consuming and costly, which impedes the application of TCP precipitates to hcp-based metallic alloys. Here, we systematically screen the potential coherent TCP precipitate plates in the three most common hcp alloys, magnesium (Mg), titanium (Ti), and zirconium (Zr) alloys, using an efficient high-throughput screening methodology. Our findings indicate that the hcp-to-TCP structural transformations readily occur in Mg alloys, leading to abundant precipitation of TCP plates. However, hcp-Ti and Zr alloys exhibit a preference for hcp-to-bcc structural transformations, rather than the in situ precipitation of TCP plates. These screening results are largely consistent with experimental observations. The insights gained contribute to a deeper understanding of precipitation behavior in various hcp-based alloys at the atomic level and provide insightful reference results for designing novel alloys containing TCP phases.Comment: arXiv admin note: substantial text overlap with arXiv:2307.0667

1,6-Bis(prop-2-yn-1-yl­oxy)naphthalene

The title compound, C16H12O2, contains two prop-2-yn-1-yl­oxy groups attached to a naphthalene ring system at the 1- and 6-positions. The crystal packing includes an inter­molecular C—H⋯π inter­action between a terminal ethynyl H atom and an ethynyl group on a glide-related mol­ecule and another inter­action between an O-atom-linked methyl­ene H and an ethynyl group of a different glide-related mol­ecule

4,4′-[8b,8c-Bis(ethoxycarbonyl)-4,8-dioxo-2,3,5,6-tetra­hydro-1H,4H-2,3a,4a,6,7a,8a-hexa­azacyclo­penta­[def]fluorene-2,6-diyl]dipyridinium bis­(tetra­fluorido­borate)

In the title compound, C26H32N8O6 2+·2BF4 −, the cation is built up from four fused rings, viz. two nearly planar imidazole rings and two triazine rings exhibiting chair conformations. One eth­oxy group is disordered between two positions in an approximate ratio 3:2. The F atoms of the two anions are each rotationally disordered between two orientations in the same 3:2 ratio. The crystal structure is stabilized by inter­molecular N—H⋯O, C—H⋯F and N—H⋯F inter­actions