International Journal of Research and Reviews in Applied Sciences
ISSN: 2076-734X, EISSN: 2076-7366

Volume 44 (July - September 2020)
To read and print the PDF files of the Journal Archive you will need to have a Pdf Reader 
 If you have any technical or content problems contact : publisher@arpapress.com
1. ANALYSIS OF CNTFET AND MOSFET PERFORMANCE THROUGH THE DESIGN OF AMPLIFIERS IN SOURCE AND DRAIN COMMON CONFIGURATION
by Roberto Marani1 and Anna Gina Perri
Abstract We present a comparative analysis of Carbon Nanotube Field Effect Transistors (CNTFETs) and MOSFET devices, through the design of an amplifier both in source and drain common configuration. In particular the CNTFET used is a C-CNTFET and the MOSFET is in 32 nm technology, in order to have comparable results. We show how the use of CNTFETs improves the performance of proposed circuits with regards to the pass band, gain and output resistance. All simulation results are performed in Verilog-A, avoiding so the problems presented in SPICE used in previous designs, proposed in literature.
Source: International Journal of Research and Reviews in Applied Sciences
July - September (Vol. 44, Issue 1) - 2020
2. INTRODUCTION TO TIME-HARMONIC ANALYSIS OF POWER TRANSFORMERS WITH LAMINATED CORES USING THE ELECTROMAGNETIC FIELD SIMULATOR FINITE ELEMENT METHOD MAGNETICS
by Antônio Flavio Licarião Nogueira, Leonardo José Amador Salas Maldonado, and Rodolfo Lauro Weinert
Abstract Laminated magnetic materials may be treated as homogeneous anisotropic materials and this, overwhelmingly facilitates the numeric modeling of the laminated cores of transformers and electric machines. The bulk model implemented in the field simulator “finite element method magnetics” is based on the concept of effective permeability wherein the laminated structure is characterized by different permeabilities in the easy and hard direction of flux travel. The method used to compute the tensor of permeabilities varies according to the class of problem to be solved: magnetostatic, linear time-harmonic with thin laminations, linear time-harmonic with thick laminations, and nonlinear time-harmonic with thin laminations. The latter class of problem is used to simulate the no-load operation of the test transformer. Results are used to build the electric circuit of the energizing winding. This circuit is formed by frequency-dependent lumped elements that represent both, the core’s magnetic loss and its magnetic stored energy. Two elementary applications of the electric circuit are used to check the self-consistency of output data. The discussion is supported by a parametric analysis that investigates the effect of hysteresis on the global quantities associated to the energizing winding. The main comparative study concerns the response of the energizing winding to increasing magnetic losses.
Source: International Journal of Research and Reviews in Applied Sciences
July - September (Vol. 44, Issue 1) - 2020
3. THE ENVIRONMENTAL IMPACTS OF A THE ASPHALT MIXING PLANT IN ALGERIA CENTRAL CASE STUDY OF CONCRETE IN HENNENCHA (W.Souk ahras)
by Sid Ahmed Soufiane
Abstract The purpose of the environmental impact assessment is to determine the integration of a project into its environment by identifying and assessing the direct and/or indirect effects of the project, and verifies that the project in question complies with environmental protection requirements.algorithm is presented in a Nuclear Magnetic Resonance (NMR) context. This research reports on a study carried out to evaluate the impact of the implantation of a concrete plant to determine the environmental consequences in the commune of Hennencha (wilaya of Souk ahras). In Algeria since the promulgation of the law on environmental protection in 1983. This study is original insofar as this "inventory" of environmental assessment capacity has never been carried out in Algeria. Environmental assessment processes are not adequately linked to environmental management and decision-making processes. Keywords: Pollution, industry, environmental impacts; preservation, Algeria.
Source: International Journal of Research and Reviews in Applied Sciences
July - September (Vol. 44, Issue 1) - 2020