Influence of the presence of CO2, which is a mild oxidant, on the performance of the thermal cracking of ethane to ethylene in the absence or presence of limited O2 at different temperatures (750– 900°C), space velocities (1500–9000 h) and CO2/C2H6 and O2/C2H6 mole ratios (0–2⋅0 and 0–0⋅3 respectively) has been investigated. In both the presence and absence of limited O2, ethane conversion incr...

one of the issues raised in the discussion knowledge of god, is the existence of different stage in this regard. despite the unity and simplicity of god and apparent similarity of knowers in existence, however, it is a question that why this plurality exist? mulla sadra, according to his philosophical principles like copulative existing of caused to cause, ontological approach to knowledge and ...

this paper addresses the differences between the two terms, “existence” and “existent”, in the framework of “indirect reference theory” and tries to answer whether or not the proposition “existence is existent” is an analytical one. the research shows that on the vocabulary level, none of the two has any additional presentation to the other. also, when by “existence” we mean “nominal existence”...

although aristotle has considered the “universal substance” as a substance, he introduced knowledge as an accident. the question then arises as to whether a “universal substance”, whereas it is a substance, can be an accident. answering the question, ibn sina has changed the subject of the dispute from “mental substance” to “quiddity of substance”, so that he could guarantee its truth in the fo...

This article brings together tiles of 16th century Persian architecture and 21st century digital tiles of moving image to explore new potentials beyond the perceived image. As minimal parts of a bigger image, they both appear still and motionless. However, Persian Islamic philosopher, Mulla Sadrā Shirazi’s (1571-1640) theory of ‘substantial motion’ (al-harakat a...

in what follows, the author has dealt with the relation between the necessary being as an unchangeable essence and his changeable and unchangeable attributes. neither is the ascription of any changeable attribute impossible for god nor is the ascription of any kind of unchangeable attribute possible. as the change of genitive attributes does not demand the change in the essence, it is possible ...