Security issues of the gold industry chain based on smart blockchain in the context of the Internet of Things.

The purpose is to solve the safety production and management problems of the gold Industrial Chain and give early warning of the safety situation of the gold Industrial Chain. According to the theory of industrial chain security governance and the basic situation of the gold Industrial Chain, this work establishes a gold Industrial Chain model based on smart blockchain and system dynamics (SD), and discusses the application of the gold Industrial Chain in the Internet of Things (IoT) environment. The overall goal of the application of IoT technology to the safety management of intelligent gold mines is to take the gold mine production demand as the driving force.

First description of the male of (Walker) (Hymenoptera: Pteromalidae), a giant pteromalid parasitoid of (Faldermann), with special reference to its sexual dimorphism.

Background: The giant pteromalid wasp (Walker) has a distinct sexual dimorphism. The metallic blue female is about 28 mm long and the metallic green male is only about 6 mm in length. This species is an ectoparasitoid of some woodborers, such as (Faldermann), a pest of many live trees and wood furniture and a quarantine pest in many countries.

Construction of Complex Structures Containing Micro-Pits and Nano-Pits on the Surface of Titanium for Cytocompatibility Improvement.

The surface topography of medical implants plays an important role in the regulation of cellular responses. Microstructure and nanostructure surfaces have been proved to enhance cell spreading and proliferation with respect to smooth surfaces. In this study, we fabricated a new structure including micro-pits and nano-pits on the surface of titanium via sandblasting, acid etching and chemical oxidation to investigate the influence of composite structures on cell behavior.

Bioactivity of micropatterned TiO nanotubes fabricated by micro-milling and anodic oxidation.

Although many methods have been proposed to fabricate a micro/nanostructure on titanium surface for enhanced cellular responses to implants, it has been challenging to construct an orderly micro/nanostructure. In this study, an ordered structure of micropatterned TiO nanotubes was produced on titanium surface by the combined use of micro-milling and anodic oxidation. The surface properties of different modified titanium samples were investigated by field emission scanning electron microscopy, laser scanning microscope, X-ray diffraction, and contact angle goniometer.