Science Development

Volume 2, Issue 1, March 2021

  • Speech Signals Separation Using Optimized Independent Component Analysis and Mutual Information

    Hussein Mohammed Salman

    Issue: Volume 2, Issue 1, March 2021
    Pages: 1-6
    Received: 30 November 2020
    Accepted: 14 December 2020
    Published: 4 January 2021
    DOI: 10.11648/j.scidev.20210201.11
    Abstract: One of the still problems in the Digital Signals Processing is the Blind Signal (Source) Separation (BSS). The BSS mean how to recover the original (source) signals from mixed (observed) signals via many sensors. There are many methods are used in the Blind Signal (Source) Separation problems specifically Cocktail Party problem, such as Independent... Show More
  • Practices and Challenges of Pestiside Application on KHat Farm, the Case of Kersa Woreda, Jimma Zone, South West Ethiopia

    Guta Waktole Weyesa

    Issue: Volume 2, Issue 1, March 2021
    Pages: 7-14
    Received: 11 January 2021
    Accepted: 22 January 2021
    Published: 30 January 2021
    DOI: 10.11648/j.scidev.20210201.12
    Abstract: The main objective of this study is to assess the practices and challenges of pestiside application on khat farm, the case of kersa woreda, jimma zone, south west ethiopia. The study was conducted in Kersa woreda located in Jimma zone, from April 2018 to August 2018. A cross sectional study design was conducted to assess the practice and challenges... Show More
  • Research Status, Hot Spots and Trends of Knowledge Management in China

    Song Peng

    Issue: Volume 2, Issue 1, March 2021
    Pages: 15-22
    Received: 30 January 2021
    Accepted: 7 February 2021
    Published: 10 February 2021
    DOI: 10.11648/j.scidev.20210201.13
    Abstract: In recent years, the rise of big data, artificial intelligence and other technologies has triggered a surge in data volume and information explosion, which has a huge impact on the research and practice of knowledge management. By combing the current situation, hot spots and future research trends of knowledge management research, we can provide re... Show More