Volume 14, Issue 4, August 2025

  • Research Article

    Weibull Distribution and Approximation, by the Finite Volume Method, of the Ultim Ruin Probability Constructed from the Hawkes Variable Memory Process

    Souleymane Badini*, Frédéric Bere

    Issue: Volume 14, Issue 4, August 2025
    Pages: 118-125
    Received: 31 May 2025
    Accepted: 16 June 2025
    Published: 4 July 2025
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    Abstract: It measures the risk that a system or company fails to maintain its elf over time. In this article, we provide an approximation of the probability of ruin at the infinite horizon whose inter-arrivals of claims follow the Hawks process and the amount of claims follows the Weibull distribution, with independence between these two processes. Using the... Show More
  • Research Article

    Robust D-optimal Designs for the First-degree and the Second-degree Kronecker Model for Mixture Experiments

    Mike Cherutich*, Jopseph Arap Koske, Mathew Kosgey

    Issue: Volume 14, Issue 4, August 2025
    Pages: 126-137
    Received: 24 May 2025
    Accepted: 6 June 2025
    Published: 14 July 2025
    DOI: 10.11648/j.ajtas.20251404.12
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    Abstract: Many practical problems are associated with the investigation of mixture of m ingredients, which are assumed to influence the response through the proportions in which they are blended together. Such problems lend their applicability to mixture experiments. Mixture experiments can be modeled using Scheffe’ or Kronecker models. For the first-, secon... Show More