This paper treats a two-echelon inventory system. The higher echelon is a single location reffered to as the depot, which places orders for supply of a single com modity. The lower echelon consists of several points, called the retailers, which are supplied by shipments from the depot, and at which random demands for the item occur. Stocks are reviewed and decisions are made periodically. Orders and/or shipments may each require a fixed lead time before reaching their respective desti nations. Section II gives a short literature review of distribution research. Section III introduces the...

Chapters in this book recognize the more than forty years of sustained and distinguished lifetime achievement in mathematics education research and development of Jeremy Kilpatrick. Including contributions from a variety of skilled mathematics educators, this text honors Jeremy Kilpatrick, reflecting on his groundbreaking papers, book chapters, and books - many of which are now standard references in the literature - on mathematical problem solving, the history of mathematics education, mathematical ability and proficiency, curriculum change and its history, global perspectives on mathematics...

Before I explain this amazing story, I need to tell you that this day, this moment in time that I am writing this to you, had everything to do with William and Melissa and my one true love. Before I go into that, I must first tell you about who I am and why this story must be told. I must tell you why there are still some of us out there. When I say some of us, I mean myself and a few others, maybe 22 at the most, and maybe even you; on a planet with billions, we are indeed very few. At one time we numbered in the thousands, but our numbers have dwindled, and it has been harder and harder to...