A DLT-based framework for secure IoT infrastructure in smart communities

In the field of smart communities, significant progress has been made in recent years. The objective of constructing smart communities is to improve the quality of life of their inhabitants. To accomplish this objective, technologies such as Internet of Things (IoT) and Artificial Intelligence (AI) were deployed. The data gathered and processed by IoT devices, particularly those with centralized control, are however susceptible to availability, integrity, and privacy risks. Due to its inherent properties of transparency, immutability, and underlying secure-by-design architecture, Distributed Ledger Technology (DLT) and Smart Contracts enable distributed, decentralized, automated workflows that can be incorporated to automate the management of the next generation of IoT networks. Using a potential use case, a conceptual architecture for securing smart communities with DLT is developed and explained. In this paper, a framework for IoT eco-systems is proposed that provides seamless integration between IoT and DLT to create a decentralized trusted architecture that ensures the trustworthiness of IoT eco-systems at design time and a trust reputation model based on the architecture to protect it at run-time. In addition, the initial implementation steps are described for this framework.     

Morphological and molecular identification of Liposcelis corrodens (Heymons, 1909) (Psocodea: Liposcelididae) as the first record from China

Liposcelis corrodens (Psocodea: Liposcelididae) is recognized as one species of common stored product pests, however, it has not been reported in China. In this study, we identified Liposcelis specimens collected from a maize reserve depot in China as Liposcelis corrodens based on morphological and molecular methods. The identification of L. corrodens and keys to the stored Liposcelis species of Group IID were reported. The mitochondrial gene cytochrome c oxidase I (mtDNA COI) of the specimens was sequenced and used as a DNA barcode to conduct molecular identification and phylogenetic analyses with other Liposcelis species of Group IID from different geographical populations. This is the first record of L. corrodens in China and it will be useful for the further studies of taxonomy and management of stored booklice.     

基于感性工学的家用制氧机意象造型设计研究

分析了产品意象造型设计的发展现状,结合感性工学理论,调查了用户对家用制氧机造型的心理倾向并提出具体设计目标,运用形态分析法提取制氧机造型特征,应用数量化理论Ι实现了基于设计目标的造型特征集与用户感性意象相关度计算,建立了意象语意与造型特征的数学模型,并对模型进行求解,得出设计方案。结果表明,基于用户体验与定量分析的设计流程与设计方法,针对性强,方便快捷,有助于制氧机产品设计流程的优化。