muḥyī al-dīn maghribī is among the few astronomers of the middle ages whose astronomical system is entirely based on new measures of planetary parameters and whose measurement of the observational data and calculation processes for determining their amount have been carried out in maragha observatory. he has explained the details of his observations and calculations in a volume called talkhīṣ a...

M. H. Dehghani N. Bostani Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454, Iran Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha, Iran Abstract We obtain two new classes of magnetic brane solutions in third order Lovelock gravity. The first class of solutions yields an (n + 1)-dimensional spacetime with a longitudinal ...

M. H. Dehghani and H. R. Rastegar Sedehi Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454, Iran Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha, Iran Abstract We construct a new class of charged rotating solutions of (n + 1)-dimensional Einstein-BornInfeld gravity with cylindrical or toroidal horizons in the presence o...

Lu and Steinhardt (Reports, 23 February 2007, p. 1106) claimed the discovery of a large, potentially quasi-crystalline Islamic tiling in the Darb-i Imam shrine but regard the earlier Maragha tiling, previously described as quasiperiodic, as a small isolated motif. We demonstrate that the Darb-i Imam pattern is periodic and that the quasi-crystalline discs superimposed on its lattice are derivat...

M. H. Dehghani and S. H. Hendi Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454, Iran Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha, Iran 3 Physics Department, Yasouj University, Yasouj, Iran Abstract Considering both the Gauss-Bonnet and the Born-Infeld terms, which are on similar footing with regard to string corre...

Maraghe observatory was built by such engineers as Moayiededdin Orozi etc. under supervision of Khaje Nasireddin Tousi in 7th century AH. The most significant feature associated with Maraghe observatory is the fact that architecture is employed to achieve astronomical purposes in this site. The reason for preferring observatory by astronomers was the fact that these units are superior to wooden...

geomagnetic observatories are constructed to continuously record the earth’s geomagnetic field. the importance of such buildings has resulted in an increasing construction of geomagnetic observatories all over the world. although geomagnetic observatories are sometimes unknown to most people and even some scientists, these very important data centers have been measuring the geomagnetic field fo...