We study the (Delta,D) and (Delta,N) problems for double-step digraphs considering the Warewashing:Other Cleaning unilateral distance, which is the minimum between the distance in the digraph and the distance in its converse digraph, obtained by changing the directions of all the arcs.The first problem consists of maximizing the number of vertices
In this article we propose a framework for a hierarchical model for cooperation between unmanned airplanes in large groups.We argue that the swarm approach to cooperation between a large number of mobile robots is ineffective when robots can be equipped with efficient communication, precise location hardware and with complex control algorithms.The
To prevent eavesdropping and tampering, network security protocols take advantage of asymmetric ciphers to establish session-specific shared keys with which further communication is encrypted using symmetric ciphers.Commonly used asymmetric algorithms include public key encryption, key exchange, and identity-based encryption (IBE).However, network
Abstract Background Nest sanitation behavior is one of the most important means to ensure high reproductive efficiency.In avian brood parasitism, nest sanitation behavior may be a pre-adaptation of host birds that allows them to identify the parasitic eggs, so that egg discrimination behavior may have evolved from nest sanitation behavior.However,