This paper considers a Markovian retrial queueing system with an optional service, unreliable server, balking and feedback.An arriving customer can avail of immediate service if the server is free.If the potential customer encounters a busy server, it may either join the orbit or balk the system.The customers may retry their request for service fro

Crop growth in different periods influences the final yield.This study started from the agronomic mechanism of yield formation and aimed to extract useful spectral characteristics in different phenological phases, which could directly describe the final yield and dynamic contributions of different phases to the yield formation.Hyperspectral informa

In this work, we are interested in the diagnostics in electronic temperature of a plasma purely photoionized, based on the intensity ration of lines emitted by ions helium-like, which have an atomic number Z relatively small.We considered the three lines corresponding to the transitions starting from the excited levels 1s2l towards the fundamental

Signaling changes that occur in the striatum following the loss of Construction Toys dopamine neurons in the Parkinson disease (PD) are poorly understood.While increases in the activity of kinases and decreases in the activity of phosphatases have been observed, the specific consequences of these changes are less well understood.Phosphatases, such

Shot hole caused by Wilsonomyces carpophilus is one of the main constraints to prune fruit production in Iran particularly in Khorasan Razavi province.It causes foliage shot hole in spring and early summer; fruit-spotting and cankers on limbs and twigs during autumn rains.The Vitamin C Supplements fungus was isolated from the lesions of twigs and w