1,313 research outputs found
Adaptive Vector Control of Induction Motor Based Inverse Dynamic Dynamometer
No full textEnhancement of the electrical machines performance with different applications requires the comprehensive study and investigations into the electrical drive systems dealing with industrial loads. Identification of the electrical motors performance characteristics and their drive systems under various loading conditions necessitates a programmable dynamometer drive system with desired dynamic characteristics to emulate the real working conditions in the laboratory environment. One of the basic challenges in such systems is to consider the effect of uncertainties and parameters variations on the dynamometer drive system performance. In this paper, the emulation of the industrial loads profile has been carried out through inverse dynamics method and by utilizing a dynamometer which is based on the adaptive model of a vector-controlled induction motor. Simulation results are presented to verify the enhanced dynamic response of the dynamometer system through the proposed method
Molothrognathus azizi Ueckermann & Khanjani 2003
No full text<i>Molothrognathus azizi</i> Ueckermann & Khanjani, 2003 <p> <i>Molothrognathus azizi</i> Ueckermann & Khanjani, 2003: 295.</p> <p> <b>Distribution</b> – Iran (Ueckermann and Khanjani 2003).</p> <p> <b>Material examined</b> – One female and one deutonymph at 3600 m a.s.l., 24 July 2019 were collected from soil and litter by Hossein Ziaei-rad.</p>Published as part of <i>Paktinat-Saeij, Saeid, Damavandian, Mohammad Reza & Ziaei-rad, Hossein, 2023, The first report on the Bdelloidea and Raphignathoidea mites (Acari: Trombidiformes: Prostigmata) from the heights of Damavand Mountain, Iran, pp. 587-592 in Persian Journal of Acarology 12 (4)</i> on page 589, DOI: 10.22073/pja.v12i4.83041, <a href="http://zenodo.org/record/10943413">http://zenodo.org/record/10943413</a>
Isotopic dating of the Khoy metamorphic complex (KMC), northwestern Iran: A significant revision of the formation age and magma source
No full textGeochronological and geochemical constraints on the petrogenesis of high-K granite from the Suffi abad area, Sanandaj-Sirjan Zone, NW Iran
No full textThe Middle Jurassic Cheshmeh-Ghasaban High-Mg gabbro (Hamedan, NW Iran): A plume-influenced intracontinental rifting event?
No full textThe Jurassic mafic to felsic magmatism affecting the older Ediacaran-to-Cambrian basement of the SanandajSirjan Zone of Iran has been traditionally interpreted as the product of arc and/or back-arc magmatism related to the early stages of Neo-Tethys subduction beneath Iran in the early Jurassic. Recent works and new compositional and geochronological data have started challenging this commonly accepted model in favor of scenarios involving continental rifting, mantle plume activity, and/or passive margin formation. In the Hamedan area of the central sector of the Sanandaj-Sirjan Zone, the Jurassic Cheshmeh-Ghasaban gabbro (ca. 165 Ma) is a key formation to better understand the tectono-magmatic framework of the whole area. Our new data, combined with the existing literature, suggest a transitional to alkaline OIB-like compositional character for this gabbro similar to the nearby but slightly younger (ca. 145 Ma) Panjeh and Ghalaylan basaltic complexes (in the SonghorGhorveh area). When integrated with the existing geochemical data of Jurassic mafic rocks from the central Sanandaj-Sirjan Zone, our results point to a scenario of intracontinental rifting, possibly involving the upwelling old metasomatized (by Proto-Tethys subduction?) mantle or mantle-plume activity
The exegesis of Tabatabaei and the Hermeneutics of Hirsch: a comparative study
Full text linkThis thesis is a comparative study between Hermeneutics on the one hand and exegesis of the Holy Qur'an on the other. Its objective is to discover whether there are salient points of convergence between the two disciples, and whether issues germane to the Hermeneutical tradition in the West have been referred to and/or employed in Muslim works of Qur'an commentary. To this end, the works of one of the most prominent Shi'ite philosophers and exegetes. Allama Mohammad Hossein Tabataei, have been analysed and compared with the perspective and methodology of E D. Hirsch, one of the most important hermeneuticians in the Western World. Hirsch has been chosen since, in the opinion of the author, there is a considerable number of commonalities between the Hirschian approach to hermeneutics and the exegetical methodology of Tabatabaei and other Shi'ite Muslim interpreters of the Qur'an.. Hirsch, as an objectivist, along with a number of other Hermeneutical scholars, are critical of those who subscribe to philosophical Hermeneutics, such as Heideger and Gadimer. The same approach is taken in Tabatabaei's works, thus providing a strong rationale for an academic comparison of these two scholars. For this reason, this thesis attempts to study the theories of Tabatabaei and Hirsch in order to highlight the similarities and differences in their works. The central hypothesis is that while small differences in approach exist, there is much common ground, and that it is possible to use certain facets of Hirschian hermeneutics in the interpretation of the Qur'an, thus modernising some of the existing exegetical approaches employed by Shi'ite scholars.Since the aim of this thesis is to compare the interpretive works of Tabatabaei with those of Hirsch's, an introductory chapter has been dedicated to the study of the evolution of Shi'ite exegesis from the beginning to date. Tabatabaei's Al-Mizan has been chosen as the foremost work of Shi'ite exegesis in the modem period. Furthermore, a complete chapter has also been dedicated to Tabatabai's exegetical modus operandi as reflected in Al-Mizan, in order to arrive at a better understanding of his perspectives. This research arrives at the conclusion that philosophical Hermeneutics and Epistemology have opened new horizons on which we will always be dependent. Whatever interpretive theories with regards to the understanding of the text are accepted, or whatever the tendency as far as literary criticism is concerned, or whatever ideas are accepted in the arena of philosophy of human and social sciences, the discussion of the nature of understanding in general cannot be avoided. This does not mean that Hermeneutics is limited to these new theories. Rather, the opportunity always exists to introduce new interpretive theories in connection with the understanding of the text. It is indeed possible to study these discussions in detail in a separate sphere independent of the other branches of Islamic sciences and arrive at a number of stable principles in the interpretation of the text in Islamic research
Discrimination of the age and tectonic setting for magmatic rocks along the Zagros thrust zone, northwest Iran, using the zircon U-Pb age and Sr-Nd isotopes
No full text"Behind the Plan to Bomb Iran"
Full text linkIsmael Hossein-zadeh is a professor of economics at Drake University, Des Moines, Iowa. He is the author of the newly published book, The Political Economy of U.S. Militarism. His Web page is http://www.cbpa.drake.edu/hossein-zade
"Islamic Fascism?"
Full text linkIsmael Hossein-zadeh is a professor of economics at Drake University, Des Moines, Iowa. He is the author of the newly published book, The Political Economy of U.S. Militarism. His Web page is http://www.cbpa.drake.edu/hossein-zade
Formation and degradation of a porphyry occurrence: The Oligocene Khatoon-Abad porphyry Mo-Cu system, NW Iran
No full textThis study investigates the temporal relationships between mineralization and magmatism in the Khatoon-Abad porphyry Mo-Cu deposit (Urumieh-Dokhtar Magmatic Arc, NW Iran). Integrated zircon U-Pb and molybdenite Re-Os dating document a prolonged stationary magmatism, spanning ∼ 45 Myr (from ∼ 66 to ∼ 21 Ma; Paleocene-Early Miocene). Three main Oligocene ore-bearing granitic intrusions and an early Miocene barren dyke swarm are documented, with the main mineralization formed at ∼ 27 Ma, as attested by the molybdenite Re-Os age of 26.75 ± 0.14 Ma and the zircon U-Pb age 26.93 ± 0.30 Ma from the host granodiorite porphyry. Despite having similar geochemical fingerprints, including an adakitic signature and having REE patterns similar to productive magmas, the subsequent Oligocene granite bodies (∼26.0–25.7 Ma) yielded lower Mo-Cu enrichments and the early Miocene rhyodacite dykes (∼21 Ma) are barren. This evidence demonstrates that the efficiency of mineralization has been reduced by changes in the physiochemical conditions of magmatic-hydrothermal systems over time. We suggest that a perturbed geothermal gradient during later Oligocene granite (at ∼ 26 Ma) caused slow cooling/degassing of the melts, and hence determined an inefficient mineralization environment. We also infer that during the latest granite porphyry pulse (∼25.7 Ma), the structurally-controlled emplacement at shallower levels resulted in rapid melt cooling along with more meteoric water mixing, eventually minor potassic but vast phyllic alterations, and hence, causing a dispersed mineralization rather than a focused fluid flow. Therefore, the later Oligocene and early Miocene magmatic pulses degraded the early mineralization. The results of this study emphasize that a consistent magma supply into the chamber followed by a rapid magma-fluid flux to the mineralization site are needed for efficient mineralization in collisional settings. Otherwise, multiple mineralization pathways and sites would result in low-grade ore bodies
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