Individual differences in adult handwritten spelling-to-dictation

We report an investigation of individual differences in handwriting latencies and number of errors in a spelling-to-dictation task. Eighty adult participants wrote a list of 164 spoken words (presented in two sessions). The participants were also evaluated on a vocabulary test (Deltour, 1993). Various multiple regression analyses were performed (on both writing latency and errors). The analysis of the item means showed that the reliable predictors of spelling latencies were acoustic duration, cumulative word frequency, phonology-to-orthographic (PO) consistency, the number of letters in the word and the interaction between cumulative word frequency, PO consistency and imageability. (Error rates were also predicted by frequency, consistency, length and the interaction between cumulative word frequency, PO consistency and imageability.) The analysis of the participant means (and trials) showed that (1) there was both within- and between-session reliability across the sets of items, (2) there was no trade-off between the utilization of lexical and non-lexical information, and (3) participants with high vocabulary knowledge were more accurate (and somewhat faster), and had a differential sensitivity to certain stimulus characteristics, than those with low vocabulary knowledge. We discuss the implications of these findings for theories of orthographic word production

Perturbation of the periodic dispersion under beam crossing optics in LHC

Beam crossing and separation schemes in the LHC interaction regions impose non-zero closed orbit in the low-beta triplets. The related perturbative dispersion is derived; propagation, multicrossing interference, perturbative effects around the ring are investigated and quantified. Horizontal and vertical compensation schemes are presented

Time integration in the code Zgoubi and external usage of PTC's structures

The purpose of this note is to describe Zgoubi's integrator and to describe some pitfals for time based integration when used in accelerators. We show why the convergence rate of an integrator can be affected by an improper treatment at the boundary when time is used as the integration variable. We also point out how the code PTC can be used as a container by other tracking engine. This work is not completed as far as incorporation of Zgoubi is concerned

NuFact muon storage ring : study of a triangle design based on solenoid focusing decay straights

Properties of acceptance and beam transmission in a triangle design of the neutrino factory muon decay ring, with decay straights based on solenoidal focusing, are reported

Projet de hadrontherapie a Lyon - Revue de l'injection dans PIMMS et variantes: protons de 7 MeV, injection exterieure

Ce rapport passe en revue certaines etudes concernant l'injection dans le synchrotron, realisees sur la base du document PIMMS du Cern, dans le cadre et en tenant compte des specificites du projet de hadrontherapie Rhones-Alpes. Deux variantes sont aussi presentees, injection de protons de 7 MeV et injection par l'exterieur de l'anneau