Reviewer acknowledgements for Journal of Agricultural Science, Vol. 15, No. 8, 2023.

Reviewer Acknowledgements for Computer and Information Science, Vol. 15, No. 1, 2022

International Journal of Psychological Studies, Vol. 15, No. 3, September 2023

Reviewer acknowledgements for Journal of Agricultural Science, Vol. 15, No. 1, 2023.

One artifact from my childhood in the 1960’s that I still remember vividly is the series of plastic slidingblock puzzles manufactured by The Roalex Company of Forest Hills, NY (no relation to the maker of fine timepieces). These consisted of a high-quality plastic puzzle glued to a piece of cardboard containing information about the puzzle. Most of their sixty or so different designs were based...

We show that the mixing time for the fifteen puzzle in an n× n torus is on the order of n logn.