1,002 research outputs found

    Iran's Quandary on Nagorno-Karabakh

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    The Azerbaijan-Armenia war on Nagorno-Karabakh was a serious challenge for the foreign policy of the Islamic Republic in Iran

    Long-lived and unstable modes of Brownian suspensions in microchannels

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    We investigate the stability of the pressure-driven, low-Reynolds flow of Brownian suspensions with spherical particles in microchannels. We find two general families of stable/unstable modes: (i) degenerate modes with symmetric and anti-symmetric patterns; (ii) single modes that are either symmetric or anti-symmetric. The concentration profiles of degenerate modes have strong peaks near the channel walls, while single modes diminish there. Once excited, both families would be detectable through high-speed imaging. We find that unstable modes occur in concentrated suspensions whose velocity profiles are sufficiently flattened near the channel centreline. The patterns of growing unstable modes suggest that they are triggered due to Brownian migration of particles between the central bulk that moves with an almost constant velocity, and highly-sheared low-velocity region near the wall. Modes are amplified because shear-induced diffusion cannot efficiently disperse particles from the cavities of the perturbed velocity field.Comment: 11 pages, accepted for publication in Journal of Fluid Mechanic

    Bioaccumulation of some heavy metals and histopathological alterations in liver of Euryglossa orientalis and Psettodes erumei along North Coast of the Persian Gulf

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    In order to make evaluation of some heavy metals bioaccumulation and explore their histopathological effects on hepatocytes of oriental sole (Euryglossa orientalis) and deep flounder (Psettodes erumei), fishes were caught from two areas of north coast of the Persian Gulf, Bandar Abbass and Bandar Lengeh. Concentrations of nickel (Ni) and vanadium (V) in liver of both species in two sampling regions were in the following order: Bandar abbass> Bandar lengeh. Between the two species, these quantities were higher in P. erumei than E. orientalis in both sampling regions. Histopathology of the liver shows some cellular alterations including degeneration, necrosis and tissue disruption, and histopathological effects were severe in P. erumei than E. orientalis. Results showed that Bandar Abbass region was more polluted than Bandar Lengeh and because Ni and V were oil pollution indicators and two flat fishes were benthic, they can receive considerable amount of oil pollution through their biological activities like feeding. Also, higher amounts of heavy metal concentrations and major histopathological effects in E. orientalis showed strong relationship between benthic habitat of the fish and amounts of received pollutants from water and sediments since E. orientalis is more related to the bottom than P. erumei.Key words: Vanadium, nickel flatfishes, Persian Gulf

    Mixed cropping of annual feed legumes with barley improves feed quantity and crude protein content under dry-land conditions

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    The objective of this research is to determine a suitable mixture of annual feed legumes and barley as a winter crop under dry-land conditions. Seeds of Hungarian vetch (cv. 2670), smooth vetch (cv. Maragheh), and local varieties of grass pea and field pea were mixed with barley (cv. Abidar) in a 1:1 ratio and were tested, along with related monoculture. All legumes in the mixture survived winter while legumes alone, except Hungarian vetch, did not survive in the cold areas. The maximum fresh and dry forage yields (56 and 15 ton ha-1 respectively) were obtained from a mixture of smooth vetch and barley in provinces with mild winter and more than 400 mm of rainfall. The mixture of barley and smooth vetch resulted in the highest mean crude protein content (17%). Autumn seeding of smooth vetch and barley in a 1:1 ratio produced more than 2 ton ha-1 of dry biomass with good quality in all studied areas and thus could serve as an alternative cropping system after wheat/barley in cold and semi-cold dry land

    Made in West - A Study of the West's Role in the Iranian Revolution 1979

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    Did the West - USA, UK, France and West-Germany - overthrow the Shah of Iran year 1979? Many Iranians believe so. Therefore the purpose of this thesis is to examine the role of the West in the Iranian revolution. The question which will be answered is: what are the motives that talk for respectively against the statement that the West overthrew the Shah of Iran? The method used is motive analyzes which analyzes the motives for and against the statement above. Neorealism, which claims that states are the main actors in international relations and for them the survival is everything, is used as a theory. The motives which have been analyzed in favor of the statement is that the Shah controlled the Persian Gulf oil, flirted with the Soviet Union, industrialized Iran and increased Iran's influence in the world, something which scared the West. The motives against the statement are that the Shah was a friend of the West, stopped the influence of the Soviet Union in the Middle East, was important for Israel's security and that instability in Iran would increase the oil prices. The conclusion is that the Shah was a threat against the security of West and therefore the West overthrew him in order to decrease Iran's power

    “O, Shah of Iran, Return Back to Iran”

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    For 39 years the Islamic Republic have been in power in Iran. Millions of books, articles, movies, series, radio programs and speeches have been produced by the regime to demolish the Shah. For 39 years have the propaganda machines of the regime been active in tyrannizing the Shah. And yet, they have failed
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