Secure and Trusted Interoperability Scheme of Heterogeneous Blockchains Platform in IoT Networks

With the rapid development of the Internet of Things(IoT),there is an increasing need for interac-tion between different networks.In order to improve the level of interconnection,especially the interoper-ability of users/devices between different nodes is very important.In the IoT heterogeneous blockchain sce-nario,how to ensure the legitimacy of the chain and how to confirm the identity of cross-chain informa-tion users/devices become the key issues to be solved for blockchain interoperability.In this paper,we pro-pose a secure and trusted interoperability mechanism for IoT based on heterogeneous chains to improve the security of blockchain interoperability.In this mecha-nism,a primary sidechain architecture supporting au-thentication at both ends of the heterogeneous chain is designed.In addition,a distributed gateway archi-tecture is proposed for cross-chain authentication and protocol conversion.The security and performance analysis shows that our scheme is feasible and effec-tive in improving the security of cross-chain opera-tions in IoT.

Preliminary experimental results by the prototype of Sanya Incoherent Scatter Radar

In the past decades,the Incoherent Scatter Radar(ISR)has been demonstrated to be one of the most powerful instruments for ionosphere monitoring.The Institute of Geology and Geophysics at the Chinese Academy of Sciences was founded to build a state-ofthe-art phased-array ISR at Sanya(18.3°N,109.6°E),a low-latitude station on Hainan Island,named the Sanya ISR(SYISR).As a first step,a prototype radar system consisting of eight subarrays(SYISR-8)was built to reduce the technical risk of producing the entire large array.In this work,we have summarized the preliminary experimental results based on the SYISR-8.The amplitude and phase among 256 channels were first calibrated through an embedded internal monitoring network.The mean oscillation of the amplitude and phase after calibration were about 1 dB and 5°,respectively,which met the basic requirements.The beam directivity was confirmed by crossing screen of the International Space Station.The SYISR-8 was further used to detect the tropospheric wind profile and meteors.The derived winds were evaluated by comparison with independent radiosonde and balloon-based GPS measurements.The SYISR-8 was able to observe several typical meteor echoes,such as the meteor head echo,range-spread trail echo,and specular trail echo.These results confirmed the validity and reliability of the SYISR-8 system,thereby reducing the technical risk of producing the entire large array of the SYISR to some extent.

Comprehensive Evaluation Model of Livable City Based on Fuzzy Comprehensive Evaluation Method

This paper firstly introduced the degree of livability of a city from the social civilization,economic affluence,environmental beauty,resource carrying capacity,and life convenience. Based on the principle of the fuzzy comprehensive evaluation,it analyzed the connection between influencing factors,and established a comprehensive evaluation model for calculation of the livability index of a city. Finally,it obtained the relative livability of each city and the ranking of livability of each city.

Dynamic landscape mapping of humoral immunity to SARS-CoY-2 identifies non-structural protein antibodies associated with the survival of critical COVID-19 patients

A comprehensive analysis of the humoral immune response to the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is essential in understanding COVID-19 pathogenesis and developing antibody-based diagnostics and therapy.In this work,we performed a longitudinal analysis of antibody responses to SARS-CoV-2 proteins in 104 serum samples from 49 critical COVID-19 patients using a peptide-based SARS-CoV-2 proteome microarray.Our data show that the binding epitopes of IgM and IgG antibodies differ across SARS-CoV-2 proteins and even within the same protein.

Reverse spillover of SARS-CoV-2 from human to wild animals

The heavily transmitted and mutated SARS-CoV-2 has constitutes a sustained threat to global health.A recent article published in Nature,firstly provided solid evidence confirming the cross-species transmission of the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)from human to free-ranging white-tailed deer(Hale et al.,2022).More importantly,circulation of SARS-CoV-2 among deer rapidly resulted into new phylogenetic clades of deer-only viruses which were believed linking to the high infection rate of SARS-CoV-2 within white-tailed deer in northeast Ohio,USA(Hale et al.,2022).

Emergence of a SARS-CoV-2 Omicron Subvariant BA.2.2 with a 454-Nucleotide Genomic Deletion-Sichuan Province,China,May 10,2022

On May 9,2022,3 local residents in Guang’an City,Sichuan Province,tested positive for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and were diagnosed as asymptomatic infections with coronavirus disease 2019(COVID-19)in a local outbreak,and as of May 14,a total of 20 confirmed cases and 398 asymptomatic infections were reported.Whole genome sequencing was performed directly on the nasal and throat swab specimens from the initial three asymptomatic infected individuals using the Illumina MiSeq platform(Illumina,San Diego,CA,USA).The complete genome sequences of 3 SARSCoV-2 strains,named SC1215,SC1216,and SC1217,were obtained.The sequence of SC1217 has been deposited in the GISAID database(under the accession number EPI_ISL_12725020).