Cannibals and garbage piles

Missionaries and Cannibals in the Causal Calculator

A knowledge representation formalism is \elaboration tolerant" to the extent that it is convenient to modify a set of facts expressed in the formalism to take into account new phenomena or changed circumstances. John McCarthy illustrated this idea by deening 19 elaborations of the Missionaries and Cannibals Problem. We argue that, to a certain degree, the goal of elaboration tolerance is met by...

Cannibals, Amazons, and Social Reproduction in Amazonia

Prestressed Concrete Piles

A state of the art presentation on prestressed piling as used throughout the world is discussed in this General Report to the FIP Symposium on Mass-Produced Prestressed Precast Elements in Madrid, Spain, May 1968. Historical information, design data and notes along with manufacturing techniques, installation practices, discussion of problems and failures and a complete bibliography are all cove...

An Operation for Piles

In tlie British Medical Journal, November 2Gth, 1898, Mr. Thelwall Thomas published an account of an operation for piles which I have tiied and found so satisfactory that I have since been in the habit of performing it on all my cases. The results are excellent, and it has the advantage of being easily and quickly performed. The patient complains of very little pain and recovery is rapid. A ful...

Injection for Piles

Twenty-Five years ago the surgical world in England, as I remember it, was largely dominated by a small circle of London Surgeons, of whom Sir Frederic Treves might fairly be considered the chief. It was a school with a short way with dissenters, and no doubt had its little mannerisms. The instrument known as a director (a harmless tool if properly employed, and still in common use in spite of ...