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   https://doi.org/10.1145/3411827  

   Yang, Yu ; Fang, Zhihan ; Xie, Xiaoyang ; Zhang, Fan ; Liu, Yunhuai ; Zhang, Desheng ( September 2020 , Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies)

   Human mobility modeling has many applications in location-based services, mobile networking, city management, and epidemiology. Previous sensing approaches for human mobility are mainly categorized into two types: stationary sensing systems (e.g., surveillance cameras and toll booths) and mobile sensing systems (e.g., smartphone apps and vehicle tracking devices). However, stationary sensing systems only provide mobility information of human in limited coverage (e.g., camera-equipped roads) and mobile sensing systems only capture a limited number of people (e.g., people using a particular smartphone app). In this work, we design a novel system Mohen to model human mobility with a heterogeneous sensing system. The key novelty of Mohen is to fundamentally extend the sensing coverage of a large-scale stationary sensing system with a small-scale sensing system. Based on the evaluation on data from real-world urban sensing systems, our system outperforms them by 35% and achieves a competitive result to an Oracle method.

    

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2. On the Analysis of On-board Sensing and Off-board Sensing through Wireless Communication for UAV Path Planning in Wind Fields

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4. Flood Detection Framework Fusing The Physical Sensing & Social Sensing

   https://doi.org/10.1109/SMARTCOMP50058.2020.00080  

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5. Antiactivators prevent self-sensing in Pseudomonas aeruginosa quorum sensing

   https://doi.org/10.1073/pnas.2201242119  

   Smith, Parker ; Schuster, Martin ( June 2022 , Proceedings of the National Academy of Sciences)

   Quorum sensing is described as a widespread cell density-dependent signaling mechanism in bacteria. Groups of cells coordinate gene expression by secreting and responding to diffusible signal molecules. Theory, however, predicts that individual cells may short-circuit this mechanism by directly responding to the signals they produce irrespective of cell density. In this study, we characterize this self-sensing effect in the acyl-homoserine lactone quorum sensing system of Pseudomonas aeruginosa . We show that antiactivators, a set of proteins known to affect signal sensitivity, function to prevent self-sensing. Measuring quorum-sensing gene expression in individual cells at very low densities, we find that successive deletion of antiactivator genes qteE and qslA produces a bimodal response pattern, in which increasing proportions of constitutively induced cells coexist with uninduced cells. Comparing responses of signal-proficient and -deficient cells in cocultures, we find that signal-proficient cells show a much higher response in the antiactivator mutant background but not in the wild-type background. Our results experimentally demonstrate the antiactivator-dependent transition from group- to self-sensing in the quorum-sensing circuitry of P. aeruginosa . Taken together, these findings extend our understanding of the functional capacity of quorum sensing. They highlight the functional significance of antiactivators in the maintenance of group-level signaling and experimentally prove long-standing theoretical predictions. 

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