Preliminary test of a luminescence profile monitor in the CERN SPS

In order to satisfy the tight emittance requirements of LHC, a non-intercepting beam profile monitor is needed in the SPS to follow the beam emittance evolution during the acceleration cycle from 26 to 450 GeV. Beyond 300 GeV, the synchrotron light monitor can be used. To cover the energy range from injection at 26 GeV to 300 GeV, a monitor based on the luminescence of gas injected in the vacuum chamber has been tested and has given interesting results. This monitor could also be used in LHC, where the same problem arises. Design and results are presented for the SPS monitor

Can we improve children's spelling ability by teaching morphemes through text reading :an intervention study exploring the relationship between morphological awareness and literacy

Background: The need to improve children's spelling ability remains a\ud key government agenda and is an issue encountered frequently by\ud Educational Psychologists (EPs) in their practice. Recent research has\ud suggested that there is a strong connection between awareness of\ud morphemes and understanding and accurate use of the English spelling\ud system, but relatively little is taught on this subject in school. The aim of\ud the present study was to investigate whether a 5-week intervention can\ud promote the development of 6- to 8-year-olds' morphological awareness\ud and spelling ability.\ud Method: Through the medium of guided group reading, an Intervention\ud group were taught about the morphological rules that govern the spelling\ud of plural `-s' and past tense `-ecf, whilst a Control group were taught about\ud two phonologically-based spelling patterns. The intervention was\ud compatible with current curriculum demands and was delivered to whole\ud classes by their teachers. Pseudoword spelling tasks were administered\ud at pre-, immediate post-, and delayed post-intervention points to assess\ud the children's learning of the morphological rules in question.\ud Results: Quantitative analyses suggested that the intervention did not\ud have a significant impact on morphological awareness in spelling.\ud However, a third of participating children showed clear gains, and reasons\ud for variation in response to intervention were explored. The overall picture\ud indicated that those with better literacy skills have better baseline\ud morphological awareness and that they also responded best to the\ud intervention.\ud Conclusions: The implications of the results are discussed with reference\ud to theories of literacy development and individual differences therein; and\ud in the context of teaching and the profession of Educational Psychology. It\ud is hoped that the study will increase the evidence-base of EP work, and\ud raise awareness that the system of morphemes could be a powerful\ud resource for children learning literacy

Adaptive optics for the LEP 2 synchrotron light monitors

The image obtained with the LEP synchrotron radiation telescopes deteriorates, giving multiple and deformed images, when the beam energy goes beyond 80 GeV at beam currents above 2 mA. This problem is due to the deformation of the light extracting beryllium mirror, by as little as 1 mm, and had been predicted at the design stage. To overcome this problem, several changes together with an adaptive optics set-up have been introduced. These essentially consist of a cylindrically deformable mirror to compensate the cylindrical deformation of the beryllium mirror and a movable detector to compensate the spherical deformation. Both components are continuously adjusted as a function of beam current and energy

The OTR screen betatron matching monitor of the CERN SPS

In order to satisfy the stringent emittance requirements of LHC, betatron matching monitors, based on multiturn beam profile measurements, have been proposed for the SPS and LHC. A test monitor has been installed for evaluation in the CERN SPS first in 1996 and improved in 1997. It is based on an OTR screen and a fast beam profile acquisition system. It has been used with proton beams to assess the quality of the betatron matching from the PS to the SPS in 1998. Experience and results are presented

First Results from Betatron Matching Monitors Installed in the CERN PSB and SPS

In order to satisfy the tight emittance requirements of LHC, betatron matching monitors, based on multiturn beam profile measurements, have been proposed and installed in the CERN SPS and PSB. The SPS monitor is based on a OTR beam profile acquisition system and was installed two years ago and has since been tested. It helped to uncover a mismatch between PS and SPS. Experience and more results wil l be presented. The PSB monitor is based on a wire SEM and has been installed at the beginning of 1998. The first results presented here are very promising

Acoustical characterisation of carbon nanotube-loaded polydimethylsiloxane used for optical ultrasound generation

An optical ultrasound generator was used to perform broadband (2-35 MHz) acoustical characterisation measurements of a nanocomposite comprising carbon nanotubes (CNT) and polydimethylsiloxane (PDMS), a composite that is commonly used as optical ultrasound generator. Samples consisting of either pure PDMS or CNT-loaded PDMS were characterised to determine the influence of CNTs on the speed of sound and power-law acoustic attenuation parameters. A small weight fraction (<; 1.8%) of added CNTs was found to yield a prominent increase in the exponent of the power law, resulting in a significant increase in acoustic attenuation at higher frequencies. The speed of sound was found to be nearly identical, however. These results could prove useful in the numerical modelling and design of future optical ultrasound sources based on CNT-loaded PDMS

Counterparts: Clothing, value and the sites of otherness in Panapompom ethnographic encounters

This is an Author's Accepted Manuscript of an article published in Anthropological Forum, 18(1), 17-35, 2008 [copyright Taylor & Francis], available online at: http://www.tandfonline.com/10.1080/00664670701858927.Panapompom people living in the western Louisiade Archipelago of Milne Bay Province, Papua New Guinea, see their clothes as indices of their perceived poverty. ‘Development’ as a valued form of social life appears as images that attach only loosely to the people employing them. They nevertheless hold Panapompom people to account as subjects to a voice and gaze that is located in the imagery they strive to present: their clothes. This predicament strains anthropological approaches to the study of Melanesia that subsist on strict alterity, because native self‐judgments are located ‘at home’ for the ethnographer. In this article, I develop the notion of the counterpart as a means to explore these forms of postcolonial oppression and their implications for the ethnographic encounter