Kepler’s 2nd law, the law of areas, is usually taught in passing, between 1st and 3rd laws, to be explained “later on” as a consequence angular momentum conservation. The laws receive bulk attention; because paradigm-shift significance overhauling previous circular models with epicycles both Ptolemy Copernicus, its convenience standard curriculum having simple mathematical statement that...

A large number of studies show that uncontrolled and unplanned spatial and functional developmentsin old central districts of large and medium-sized Iranian cities in past few decades have resulted in many unpleasanttransformations. Thus, the historic urban fabrics have gradually lost their socio-economic livability and quality and thisissue has led to urban distress, blight and deterioration.T...

Most graph structured data, such as data created from the web, social, citation and computer networks, evolve over time. In this paper, we assume that we are given the history of a graph in the form of a sequence of graph snapshots. Our goal is to define the different types of queries that one can ask regarding the graph history and present an initial approach to storing graph snapshots and pro...

in this article naser al-din shah’s accounts of travels to europe (safar-nameh) have bee examined and criticised in a discourse analysis approach. by using this approach, attention has been paid to linguistic factors, co-text and context of the situation (social, cultural, political and historical), and institutional position, as well as the writer's attitude which has been effective in informi...