We adapt the CRT approach to computing Hilbert class polynomi-als to handle a wide range of class invariants. For suitable discriminants D, this improves its performance by a large constant factor, more than 200 in the most favourable circumstances. This has enabled record-breaking constructions of elliptic curves via the CM method, including examples with |D| > 10 15 .

Résumé : Ce papier présente un formalisme relationnel pour la classification topographique de données qualitatives (ou catégorielles), se présentant sous forme d’une matrice binaire ou d’une somme de matrices binaires. L’algorithme de la classification relationnelle topographique proposé s’inspire du modèle de Kohonen (conservation de l’ordre topologique) et utilise le formalisme de l’Analyse R...

A general X-ray tube has two electrodes, the cathode and the anode, with a high voltage applied between them. Electrons are generated at the cathode. After the electrons are emitted from the cathode they are accelerated by the high voltage toward the anode (positive) electrode. The high speed electrons hitting the anode material then generate invisible radiation i.e. X-rays. The energy spectrum...

It may be maintained by some that a discussion of the benefits of computer assisted cartography for map reading is premature, and in fact, it may correctly be pointed out that the testing by cartographers of map reading abilities on computer produced maps has not even begun as yet in a systematic way. This state of affairs is especially true of the testing of map reading abilities on 'temporary...

Background Capillary refill time (CRT) was introduced in 1947. In the 1980`s, it was proposed as one of five elements in the Trauma Score and defined as two seconds or less in all adult patients. An alternative definition (sex and age dependent) has been introduced by Schriger and Baraff. We performed a prospective observational cohort study to assess the relationship between CRT and 30day mort...

In this work we collect the strongest known algebraic attacks on multi-prime RSA. These include factoring, small private exponent, small CRT exponent and partial key exposure attacks. Five of the attacks are new. A new variant of partial key exposure attacks is also introduced which applies only to multi-prime RSA with more than two primes.

Using NIRS, we investigated brain activity in subjects searching for target characters in given text. Visual stimuli consisted of two different contrasts: positive and negative. Both stimuli were displayed for 30 sec on a cathode-ray tube (CRT: 21 inches). The subjects were instructed to watch a visual display on the CRT. This display included text without meaning. When target characters were d...

A matching task was used to measure the effects of ambient illumination, raster luminance, and target size on color discriminability in a CRT display. A set of ten easily distinguishable colors was presented under two conditions of ambient illumination (dark and bright) and two conditions of raster luminance (low and intermediate). Below this set, a target color was presented as either a circle...