نتایج جستجو برای: secondary current
تعداد نتایج: 1058390 فیلتر نتایج به سال:
The probable reasons for evolution of weld porosity and solidification cracking and the structure- property relationship in aluminium welds were investigated. Aluminium plates (1xxx series) were welded by Tungsten Inert Gas (TIG) welding process, 5356 filler metal was used and heat input was controlled by varying welding current (145A, 175A and 195A). The welded samples were examined under opti...
Additional current pulses get injected into the lightning channel from branches and/or from successive reflections within struck Tall Grounded Objects (TGOs). These pulses termed here as “secondary current waves/pulses” affect the lightning Electro-Magnetic Fields (EMFs). With regard to these, an important question arises on whether or not these pulses get reflected at the main wavefront and th...
The main purpose of this research is to classification the rangeland sites of Verbascum songaricum schrenk and determine qualitative indices of the species which can separate this sites by cluster analysis. In this study, species were collected from 5 of its settlements, Howz Vally, Gahiz, Semeiroom entrance and Ghadam palace in Isfahan province as well as Dena place in Kohgiloye – Boyer Ahmad ...
This paper reports the results of a qualitative study about the effectiveness of major reforms taken place in 1990s towards closing down the gap between general upper secondary education and the economy in Iran. The study aimed to analyse questions such as: To what extent dose Iranian secondary education meet current and future needs of labour market? How satisfied are employers and other key s...
background: genomic dna was isolated from parabronema skrjabini . rrna region was amplified and sequenced. methods : the rna secondary structure was predicted using mfold software (http://mfold.rit.albany.edu). the secondary structure with bulge, hairpins, helices, interior, external and multi loops was predicted for 5.8srdna of our sequence of p. skrjabini and a sequence of p. skrjabini and tw...
Up to now, different designs have been introduced for measurement beam profile accelerators. Secondary electron emission monitors (SEM) are one of these devices which have been used for this purpose. In this work, a SEM has been constructed to measure beam profile of ES-200 accelerator, a proton electrostatic accelerator which is installed at SBU. Profile grid for both planes designed with 16 w...
The coupled motion of the vortex lattices of two electrically insulated, superimposed, superconducting thin films Cprimary and secondary) in a perpendicular magnetic field, is predicted to exhibit a Josephson-like behavior. For a dc applied current flowing in the primary film, the voltage difference between the time-averaged primary and secondary flux flow voltages obeys the equations of a resi...
Rhabdomyosarcoma is a malignant neoplasm and the most common soft tissue sarcoma in children. The current frontline treatment for rhabdomyosarcoma is a multi-modal approach, comprising chemotherapy, surgical resection, and/or radiation therapy. Radiation therapy during odontogenesis can lead to delayed sequel such as hypodontia, microdontia, and dwarfed teeth with underdeveloped roots. This cas...
The operation and parameters of Bunch Shape Monitors using coherent transformation of time structure of an analyzed beam into a spatial one of low energy secondary electrons emitted from a wire target is influenced by the characteristics of a beam under study. The electromagnetic field of a bunch disturbs the trajectories of secondary electrons, thus resulting in a degradation of phase resoluti...
Airport ground lighting (AGL) systems provide visual reference to aircrafts during airport operations. In AGL systems, constant current regulators feed a beacon circuit supplied through isolation transformers. Component modeling is necessary to simulate AGL systems, and thus characterize and predict their behavior. This paper presents an isolation transformer model including transformer core sa...
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