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In recent years, mobile smart devices have gained popularity globally due to their convenience and efficiency. However, this popularity has also attracted the attention of virus creators, resulting in a significant cost to users. Current research on virus propagation primarily focuses on developing anti-virus software and macroscopic modeling. Software development often lags behind and only begins when viruses become a significant threat. In contrast, macroscopic modeling frequently deviates from reality as real networks do not completely conform to the characteristics of scale-free or small-world networks. Furthermore, special factors such as device mobility and signal attenuation must be considered when studying Bluetooth-transmitted viruses. Traditional research methods have shown limited performance in this field. To address these issues, this paper proposes a method that describes the propagation behavior of Bluetooth viruses in smart devices by utilizing an Infectious Attenuation Algorithm (IAA) and real maps. This method incorporates population density, map contours, and user security awareness to construct a unique discrete system. More importantly, we integrate this system into the map of Deyuan Street in Chengdu City and create a visualization system using the Simulation of Urban Mobility (SUMO) simulation software. In this system, the proposed IAA simulates the decay of virus infectivity based on the distance between devices and the attenuation of signal power between them. Our research approach considers the two core elements of infectivity attenuation and maps, making it more realistic and overcoming the lag in software development. Additionally, the introduction of SUMO for visualization simulation enhances the practical significance of our experiments. Finally, we propose feasible prevention strategies based on comparative experiments, data analysis, and theoretical analysis.

Haynaldia villosais a wild relative of wheat and a valuable gene resource for wheat improvement. Owing to the limited number of probes available for fluorescence in situhybridization (FISH), the resolution at which the karyotype of H. villosacan be characterized is poor, hampering accurate characterization of small segmental alien introgressions. We designed ten oligonucleotide probes using tandem repeats in DNA sequences derived from the short arm of H. villosachromosome 6V (6VS). FISH with seven of them resulted in clear signals on H. villosachromosomes. Using these, we constructed FISH karyotypes for H. villosausing oligo-6VS-1 and oligo-6VS-35 oligonucleotides and characterized the distribution of the two probes in five different H. villosaaccessions. The new FISH probes can efficiently characterize H. villosaintrogressions into wheat.

The materials for artificial bone scaffolds have long been a focal point of biomaterials research. Tantalum, with its excellent bioactivity and tissue compatibility, has gradually become a promising alternative material. 3D printing technology shows unique advantages in designing complex structures, reducing costs, and providing personalized customization in the manufacture of porous tantalum fusion cages. Here we report the world-first pre-clinical large animal (sheep) study on the newly developed 3D printed biomimetic trabecular porous tantalum spine fusion cage for assessing the long-term intervertebral fusion efficacy and safety.