A model is a selected simplified representation of the essential or relevant entities (modules) of some specific reality and their characteristics (fields, factors, features). (http://www.problemistics.org/courseware/toolbook/modelling.html)
Note
Representation or simulation of a process or system
Double-stranded (ds) RNA viruses are a diverse group of viruses that vary widely in host range (humans, animals, plants, fungi, and bacteria), genome segment number (one to twelve) and virion organization (T-number, capsid layers or turrets). Members of this group include the rotaviruses, known globally as a common cause of gastroenteritis in young children, and bluetongue virus, an economically important pathogen of cattle and sheep. (https://en.wikipedia.org/wiki/Double-stranded_RNA_viruses)
