We define five properties of symbol representations (called the Five M's) that together provide a powerful and flexible symbol processing facility. Our ideal symbol structures arc Mobile, Memorable, Meaningful, Malleable, and Modifiable. Conventional symbol processing architectures, such as Lisp on von Neumann machines, support some of these properties, but others seem to require flexibility an...

A very general commentary on the program camex, accompanied by an assortment of experiments which can be performed using the cam/pc board. These include the use of one, two, and three dimensional automata, although the primary utility of the board lies with two dimensional automata evolving on a 256x256 screen. Binary Moore and von Neumann neighborhoods are possible in each of the two half-cam'...

Publisher's Note: This article has a companion Point by Kouides. Publisher's Note: Join in the discussion of these articles at Blood Advances Community Conversations.

The Birkhoff-von Neumann Theorem has been proved many times in the literature with a number of different methods, some inductive, some constructive, some existential. We offer a new proof that is a little more direct than most, though nonconstructive.

Dieser Beitrag untersucht die effiziente Auswertung von SPARQLAnfragen auf großen RDF-Datensätzen. Zum Einsatz kommt hierfür das Apache Hadoop Framework, eine bekannte Open-Source Implementierung von Google's MapReduce, das massiv parallelisierte Berechnungen auf einem verteilten System ermöglicht. Zur Auswertung von SPARQL-Anfragen mit Hadoop wird in diesem Beitrag PigSPARQL, eine Übersetzung ...

The Mildred Weisenfeld award truly is a magnificent honor to have been bestowed on me. Self-consciously, I can’t deny the suitability of the honor, even if the merit in my case can be questioned, and I warm to the task of explaining its aptness. Mildred Weisenfeld, a retinitis pigmentosa sufferer from her teens, is known to the ARVO community for her unstinting and visionary energy in fund-rais...

IN 1869 von Graefe described a complication following operations for glaucoma in which a shallow or absent anterior chamber was associated with severe intra-ocular pain and a greatly increased intra-ocular pressure. This condition carried with it an extremely poor visual prognosis due to its resistance to any form of treatment. The passage of the years has done little to diminish the problem of...

Various terms have been applied to this condition: Mobius's syndrome, congenital facial diplegia, congenital oculo-facial paralysis, nuclear agenesis, and congenital nuclear aplasia. It was originally described by von Graefe (1880), Harlan (1881), and Chisolm (1882). M6bius (1892) collected 43 cases of congenital and acquired cranial nerve palsies and classified them into six groups. One group ...