Science Journal of Circuits, Systems and Signal Processing

Volume 8, Issue 2, December 2019

  • Hybrid Renewable Energy Systems for Electrification: A Review

    Ibrahim Baba Kyari, Jamilu Ya’u Muhammad

    Issue: Volume 8, Issue 2, December 2019
    Pages: 32-39
    Received: Jul. 08, 2019
    Accepted: Jul. 27, 2019
    Published: Aug. 14, 2019
    Abstract: Renewable energy systems are becoming widespread in the future due to adverse environmental friendly and abundant in nature. Solar and wind energy resources are alternative to each other which will have the actual potential to satisfy the energy demand. But wind energy system may not be technically viable at all sites because of low wind speeds and... Show More
  • Satellite Image Used to Solve the Impact of Silt and Velocity on Discharge Carrying Capacity of Right Bank Canals of SukkurBarrage Pakistan

    Farhan Hussain Wagan, Sadaf She, Ghulam Hussain Wagan

    Issue: Volume 8, Issue 2, December 2019
    Pages: 40-46
    Received: Jun. 21, 2019
    Accepted: Aug. 03, 2019
    Published: Aug. 15, 2019
    Abstract: Pakistan is basically an agricultural country, agriculture is considered the back bone of the country. It helps country in earning foreign exchange, about 90% of output comes from agriculture, supports in employment and economy by exporting food grains. Luckly Pakistan has worlds third giant irrigation system, it comprises best storage infra-struct... Show More
  • Floyd’s Modified Computational Method Applied to Calculate Step Response of a Regilator from Frequency Response

    Jose Flavio Feiteira, Jose Luiz Guarino, Rodrigo Guerra de Souza

    Issue: Volume 8, Issue 2, December 2019
    Pages: 47-52
    Received: Jul. 10, 2019
    Accepted: Aug. 12, 2019
    Published: Aug. 23, 2019
    Abstract: This work explains how to obtain the unit step time domain response by means of the frequency response of a regulator (gain and phase) using the Floyd’s Modified Computational Method. The preliminary condition is that the gain of the system tends to zero as the frequency tends to infinite. Floyd’s Method uses the Fourier’s Inverse Transform to achi... Show More
  • Analysis of the Power Blackout in the Ethiopian Electric Power Grid

    Moges Alemu Tikuneh, Getachew Biru Worku

    Issue: Volume 8, Issue 2, December 2019
    Pages: 53-65
    Received: Jul. 05, 2019
    Accepted: Jul. 31, 2019
    Published: Aug. 26, 2019
    Abstract: In recent years, with an increasing load demand for rural electrification and industrialization, the Ethiopian power system has faced more frequent, widely spread and long-lasting blackouts. To identify the impacts, analyzing and studying the reasons and the mechanisms of such blackouts would be the first step and so, the January 6th, 2016 blackout... Show More
  • Dynamics of an Optically Injected Diode Laser Subject to Periodic Perturbation: Occurrence of a Large Number of Attractors, Bistability and Metastable Chaos

    Thiery Tchinda, Zeric Njitacke, Theophile Fozin Fonzin, Hilaire Fotsin

    Issue: Volume 8, Issue 2, December 2019
    Pages: 66-75
    Received: Nov. 14, 2019
    Accepted: Dec. 11, 2019
    Published: Dec. 25, 2019
    Abstract: It is well known that during a certain interval of time, a molecule of gas in the beam path from the pump laser (master) to the injected laser (slave) can decrease the power injected [1]. In this contribution, we consider a well-known rate equation model of semiconductor laser to explore numerically the effect of a periodic perturbation from the pu... Show More
  • Performance Improvement of 4-Bit Static CMOS Carry Look-Ahead Adder Using Modified Circuits for Carry Propagate and Generate Terms

    Mehedi Hasan, Moumita Sadia Islam, Muhtasim Rafid Ahmed

    Issue: Volume 8, Issue 2, December 2019
    Pages: 76-81
    Received: Dec. 02, 2019
    Accepted: Dec. 18, 2019
    Published: Dec. 27, 2019
    Abstract: Carry Look-Ahead Adder (CLA) is considered as one of the most widely used adder topologies which are used in high performance computing systems. In this research, an improved version of 4-bit CLA adder has been proposed. Performance improvement of 4-bit CLA adder has been made by using hybrid AND and XOR gates in the input side for generating carry... Show More