Large reserves of coal in Tabas region of Iran are characterized by low ash and high caking index, suitable for use in metallurgy as coking coal. However, these coals cannot be gainfully utilized because of their high sulfur content. In this work, studies on desulfurization of Tabas coals were carried out in a batch reactor using various reagents. The most effective reagents,<...

Abstract—Finding the linear and nonlinear responses of a typical single-degree-of-freedom system (SDOF) is always being regarded as a time-consuming process. This study attempts to provide modifications in the renowned Newmark method in order to make it more time efficient than it used to be and make it more accurate by modifying the system in its own non-linear state. The efficacy of the prese...

Ajalugu saab ja peab tegema ka ilma matemaatiliste meetoditeta. Kuid mõnes mõttes tundub mulle ajaloolane, kes kaasajal ei taha kasutada neid meetodeid, umbes inimesena, tahab sõita Moskvasse. otsustab mitte Estoniaga1, vaid võtab kepi kätte hakkab jala minema… (Juhan Kahk 1988 [1980]) „Eile tabas meie linna selline rahetorm, millist mäleta […]

the sorkh shale formation (lower triassic) crops out in parts of tabas block. this formation is composed of limestone, dolomite, sandstone, shale and gypsum. its lower contact with the permian rocks and its upper contact with the shotori formation is marked by distinct erosional unconformity. to determine the depositional environments of the sorkh shale formation, stratigraphic sections of goda...

in this experiment, the chemical composition of the essential oils obtained from ferula assa-foetida oleo-gum resin collected from two different sites of yazd province (tabas and yazd) in the center of iran, were identified. the gas chromatography mass-spectroscopy (gc/ms) data showed that the qualitative composition of the components appeared to be constant in two different regions. moreover, ...

accurate mapping of geological structures play an important role in the land management, some of which are considered as the origination of wind deposits, dust and aerosols. during the last decades, remote sensing has considerably helped the studies of desert areas especially in change detection of land phenomena. this study aims to study the facies morphology of playa in tabas kavir, based on ...

Tabas mines in Iran have coal sources which are suitable for use in metallurgy industries as coking coal. But the high sulfur content of this coal imposes severe limitations on its utilization as the sulfur oxide gases evolved from the combustion of high sulfur coals result in acid rains and corrosion of equipments. In this work, attempts have been made to reduce sulfur from high sulfur coa...

rhaetian strata from the nayband formation of the tabas block, east- central iran, were studied palynologically. the materialexamined contained moderately diverse and well-preserved dinoflagellate cyst assemblages which lead to the identification ofrhaetogonyaulax rhaetica zone. the assigned age of this dinozone (rhaetian) is justified by plant fossils such as equisetitesarenaceus, scytophyllum...