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Open AccessDetermination and health risk assessment of carbamate pesticide residues in date palm fruits (Phoenix dactylifera) using QuEChERS method and UHPLC-MS/MS
This study aimed to investigate carbamate pesticide residues in different varieties of date palm fruits in the UAE, utilizing UHPLC-MS/MS. For sample preparation and clean-up, the efficiency and performance of...
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Open AccessDual sourcing inventory management with nonconsecutive lead times from a supply chain perspective: a numerical study
We study a stochastic multi-period two-echelon dual sourcing inventory system where the buyer can source a product from two different suppliers: a regular and an expedited supplier. The regular supplier is a l...
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Serial independence tests for innovations of conditional mean and variance models
In this paper, one studies the asymptotic behavior of empirical processes based on consecutive residuals of univariate conditional mean and variance models. These processes are then used to develop tests of se...
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A Closed-Loop Supply Chain Equilibrium Model with Random and Price-Sensitive Demand and Return
This paper proposes a decentralized closed-loop supply chain network model consisting of raw material suppliers, manufacturers, retailers, and recovery centers. We assume that the demands for the product and t...
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Diagnostic Tests for Innovations of ARMA Models Using Empirical Processes of Residuals
In view of applications to diagnostic tests of ARMA models, the asymptotic behavior of multivariate empirical and copula processes based on residuals of ARMA models is investigated. Multivariate empirical proc...
