We report the first preparation of a supramolecular polysulfide polymer using metal-ligand interactions. The was prepared by introducing 2,2’-bipyridine (bpy) at both ends linear sulfur and linking bpy with Cu2+. molecular weight higher than obtained via conventional polymerization. Disassembly re-assembly polymers were controlled de-metalation Cu2+ from complex between re-formation addition ch...

Mobile robots are increasingly used in automated industrial environments. There are also other applications like planet exploration, surveillance, landmine detection, etc. In all these applications, in order that the mobile robots perform their tasks, collision-free path planning is a prerequisite. This article provides an overview of the research progress in path planning of a mobile robot for...

Investigating the evolution of animal behavior is difficult. The fossil record leaves few clues that would allow us to recapitulate the path that evolution took to build a complex behavior, and the large population sizes and long time scales required prevent us from re-evolving such behaviors in a laboratory setting. We present results of a study in which digital organisms-self-replicating comp...

Corneal collagen cross-linking has become the preferred modality of treatment for corneal ectasia since its inception in late 1990s. Numerous studies have demonstrated the safety and efficacy of the conventional protocol. Our understanding of the cross-linking process is ever evolving, with its wide implications in the form of accelerated and pulsed protocols. Newer advancements in technology i...

Pulsar wind nebulae are fascinating systems, and archetypal sources for high-energy astrophysics in general. Due to their vicinity, brightness, the fact that they shine at multi-wavelengths, especially long-living emission gamma-rays, modelling properties is particularly important correct interpretation of visible Galaxy. A complication this respect variety morphologies show different ages. Her...

Multi-UAV cooperative path planning is a key technology to carry out multi-UAV tasks, and its research has important practical significance. A combination of single-UAV paths, so the idea problem decomposition effective deal with planning. With this analysis, algorithm based on co-evolution optimization was proposed in paper. Firstly, by analyzing meaning flight, model given. Secondly, we desig...