for a given riemannian manifold (m,g),it is an interesting question to study the existence of a conformal diffemorphism (also called as a conformal transformation) f : m ! m such that the metric g? = fg has one of the following properties: (i)(m; g?) has constant scalar curvature. (ii)(m; g?) is an einstein manifold.

the changes in todays world organization, to the extent that instability can be characterized with the most stable organizations called this afternoon. if you ever change management component, an additional value to the organization was considered, today, these elements become the foundation the organization is survival. the definition of the entrepreneur to identify opportunities to exploit a...

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...

Mir Ali Heravi (died in 1545) is one of the greatest masters in Nasta’liq script who was famous and popular while he was alive among Uzbek, Indian and Ottoman governors. Majnoun Rafiqi is also one of the poets and calligraphers who is contemporary with Mir Ali and has written three treatises about teaching calligraphy. He was famous in his own period of time but since he did not have well-known...

Mir Ali Heravi (died in 1545) is one of the greatest masters in Nasta’liq script who was famous and popular while he was alive among Uzbek, Indian and Ottoman governors. Majnoun Rafiqi is also one of the poets and calligraphers who is contemporary with Mir Ali and has written three treatises about teaching calligraphy. He was famous in his own period of time but since he did not have well-known...

Lavâyeh is one of the most famous Persian mystical texts. The treatise has been written following the example of Sheikh Ahmad Ghazzāli’s Savāneh. Devotion of ‘Eyn al-Qozāt of Hamadān to the author of Savāneh and relation of them with each other, and some other factors, caused that Lavāyeh be known by the name of ‘Eyn al-Qozāt’s, and even once has been published by his name in Iran. This untru...

dendrimer synthesis strategies now provide virtual control of macromolecular nanostructures as a function of size and surface/interior functionality. these strategies involve the covalent assembly of hierarchical components reactive monomers , branch cells or dendron’s around atomic or molecular cores according to divergent/convergent dendrite branching principles.combinon of two or more dendri...

one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...