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Showing 2 results for Safizade
Volume 19, Issue 1 (January 2019)
Abstract
Pulsed eddy current (PEC) technique is commonly used for the detection of sub-surface defects in electrically conductive metals. However, due to the limited penetration depth of eddy currents, the detection of sub-surface defects in ferromagnetic metals is limited while using PEC technique. In order to extend the application of PEC technique for the detection of sub-surface defects in ferromagnetic metals, the penetration depth of eddy currents needs to be increased. For deeper penetration of eddy currents in the material, magnetic saturation of the tested specimen is a useful solution. In magnetic saturation state, the magnetic permeability of the ferromagnetic metal is decreased and stabilized and, as a result, the penetration depth of eddy currents is increased. In this paper, the performance of the PECT for detection of sub-surface pitting defects in the magnetized ferromagnetic specimen has been investigated through finite element modeling (FEM) and experimental studies. The tested specimen is a 10mm-thick steel plate, in which sub-surface pitting defects with various depths have been modeled. A probe consisting of a driver coil, a pickup coil, and a ferrite core is used to measure the time-varying PEC signals. Then, the time domain features of the differential PEC signals are extracted and used to detect the sub-surface pittings. The results indicate that PEC technique together with magnetization can effectively detect sub-surface pitting defects.
Nasrin Tabatabai Hesari, Soroush Safizade,
Volume 28, Issue 3 (9-2021)
Abstract
The companies’ registration system is considered as the beginning of the emergence of modern company law in legal systems and its evolution has a fundamental role in the evolution and development of this legal field. Western systems have realized this fundamental role, and for this reason, today the companies’ registration mechanism offers the most complete function to prove the identity and decelerate the status of the companies. However, in Iranian law, the companies’ registration system should be considered a failed system that contains baseless formalities and lacks the necessary efficiency. A subject that according to the unity and integration of the modern company law in the framework of the need for the same regulations in different legal systems, should be considered in the difference between the interpretations of the doctrine of company law in Iranian and Western law. Based on this, the question arises as to what is the relationship between the interpretations of the doctrine of company law in the West and the development of the registration system on the one hand and on the other hand the interpretations of the doctrine of corporate law in Iran and the weakness of the registration system. This research in the framework of library information collection method and descriptive-analytical research method, by proposing three theories of Formalism, The reality of legal personality and Company enterprise, provides interpretations of them in the Western and Iranian company law and seeks to prove a direct relationship between these interpretations and the type of realized system of companies registration - from the perspective of strength and weakness - in Western and Iranian legal systems. Finally, suggestions have been made to counter these interpretations within the framework of the rules and regulations in Iranian law.
