Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2746

Table of Content: July-September, 2021; 16(3)

July 2021

Probability of dry and wet spells over West Africa during the summer monsoon season

This work aims at characterizing the conditional probability of single or consecutive dry and wet days in West Africa using the first-order Markov chain approach during the monsoon season (June to October). The results show that the probabilities of having a wet day (PW), a wet day preceded by another wet day (PWW) and a wet day preceded by a dry day (PDW) are stronger in regions where the rainfall is maximum (mountain...

Author(s): Jules Basse, Moctar Camara, Ibrahima Diba and Arona Diedhiou

August 2021

Reliability of vibratory indications during the follow-up of bearing spalling

In this work, spalling is naturally initiated on the bearing raceway during its operation on the test bench. The experimental procedure used consists of monitoring the deterioration of the ball bearing until its failure with an online acquisition of vibration signals. Vibration analysis is the method used to characterize the damage. In order to obtain a significant trend curve, spalling surface has been measured several...

Author(s): Omar DJEBILI and Oussama BERBRI