How to use the Kohonen algorithm to simultaneously analyse individuals in a survey

The Kohonen algorithm (SOM, Kohonen,1984, 1995) is a very powerful tool for data analysis. It was originally designed to model organized connections between some biological neural networks. It was also immediately considered as a very good algorithm to realize vectorial quantization, and at the same time pertinent classification, with nice properties for visualization. If the individuals are described by quantitative variables (ratios, frequencies, measurements, amounts, etc.), the straightforward application of the original algorithm leads to build code vectors and to associate to each of them the class of all the individuals which are more similar to this code-vector than to the others. But, in case of individuals described by categorical (qualitative) variables having a finite number of modalities (like in a survey), it is necessary to define a specific algorithm. In this paper, we present a new algorithm inspired by the SOM algorithm, which provides a simultaneous classification of the individuals and of their modalities.Comment: Special issue ESANN 0

A new Palma Vecchio in the Chapter Hall Museum, Birgu : some observations on the domestic Sacra Conversazione in Venice

A painting attributed to the sixteenth-century Venetian school was recently published in Birgu - A Maltese Maritime City.! The work in question. The Virgin and Child with St. Peter and a Donor (PI. 1), is owned by the Chapter Hall Museum, Birgu. 2 It can now be considered as a new addition to the oeuvre of Jacopo Negretti, called Palma il Vecchio (c.1485-1528). This article describes the process of authetification through both the style and technique of the painting.peer-reviewe

Polarization and asymmetries in neutral strange particle production

Inclusive Lambda, Antilambda and K0s production in deep inelastic ep scattering has been studied with the ZEUS detector at HERA using an integrated luminosity of 120 pb^-1. Differential cross sections, baryon to antibaryon asymmetry and baryon to meson production have been measured in the laboratory system for Q2 > 25 GeV^2.Comment: 4 pages, 5 figure

The Law of the Sea and International Marine Archaeology: Abandoning Admiralty Law to Protect Historic Shipwrecks

This Comment assesses the marine archaeology provisions of UNCLOS III and argues that the principles embodied in U.S. abandoned shipwreck law may significantly contribute to cooperative efforts that determine the future of shipwrecks found in international waters. Part I compares the existing legal framework of international marine archaeology established by UNCLOS III with U.S. law on abandoned historic shipwrecks. Part II presents commentators\u27 interpretations of the Convention\u27s marine archaeology provisions. Part II emphasizes these commentators\u27 views on the ability of a nation to obtain jurisdiction over shipwreck recovery operations in international waters and whether nations should apply principles of salvage and finds to these efforts. Part III argues that UNCLOS III should be broadly interpreted to better reflect the U.S. view that salvage and finds law is inappropriate for historic shipwrecks. Finally, Part III proposes a legal structure for the treatment of historic shipwrecks found beyond domestic jurisdiction