Radiation zoning for vacuum equipment of the CERN Large Hadron Collider

Beam losses in high-energy particle accelerators are responsible for beam lifetime degradation. In the LHC beam losses will create a shower of particles while interacting with materials from the beam pipes and surroundings, resulting in a partial activation of material in the tunnel. Efforts have been made during the accelerator design to monitor and to reduce the activation induced by beam losses. Traceability for all vacuum components has been established providing a tool to follow-up individually each component or subcomponents installed in the tunnel, regardless of their future destination e.g. recycling or disposal. In the latter case, the history of vacuum components will allow calculating the beam-induced activation and permit comparisons with in-situ and ex-situ measurements. This zoning will also help to reduce collective and individual radiation doses to personnel during interventions. The paper presents the vacuum system layout and describes the LHC vacuum zoning and its implementation using an ORACLE© database

Desmoplastic fibroma of the mandible - review of the literature and presentation of a rare case

Desmoplastic fibroma (DF) is a rare, benign but locally aggressive, intraosseous lesion with a high tendency of local recurrence. In this report the actual literature is reviewed regarding epidemiological data, pathology, clinical diagnostic criterias, therapy and prognosis. Moreover, a report of an interesting case is included localized in the mandibular corpus

Non délivrance et infécondité: intérêts de l’étiproston et du dosage de la PAGI (pregnancy-associated glycoprotein I) au cours du postpartum chez la vache.

peer reviewedaudience: researcher, professional, studentSixty Prim'holstein cows with retained placenta for more than 24 hours after parturition, were shared in three groups of 20 cows each. All cows were delivred manually 24 to 36 hours post partum and received local treatment with 1 g of oxytetracyclin. Cows in group 1 received two intra-muscular injections of 5 mg etiproston on day of manual delivery (D1) and 15 days after (D15). Cows on group II received only one etiproston administration (D1), and cows in group III remained untreated. Ratios of delayed uterine involution were respectively 20, 40 and 55 % in groupsI,II and III(I<0.05;II<0.005). PAGI concentrations were checked 15 days after parturition and were significantly higher in cows affected by delayed uterine involution (p < 0.05). V-IAF intervals were significantly (p < 0.05) different between groups I (58 days), II (102 days) and III(143 days).Soixante vaches de race Prim'holstein, ayant présenté une rétention placentaire 24 heures après le vêlage sont réparties en trois lots I, II et III (Témoin) de 20 vaches chacun. Toutes les vaches ont fait l'objet d'une délivrance manuelle 24 à 36 heures après le part, complétée d'un traitement antibiotique local à base d'oxytétracycline sous forme de 2 oblets gynécologiques dosés à 500 mg chacun. Les vaches du lot 1 ont reçu deux injections de 5 mg d'étiproston par la voie IM, le jour de la délivrance manuelle (J1) et 15 jours plus tard (J15). Les animaux du lot II sont traités par une seule injection du même produit àJ1 alors que les vaches du lot III n'ont rien reçu. Un retard de l'involution utérine (RIU) est enregistré dans 20, 40 et 55 p. cent des cas respectivement dans les lots I, II, III. La différence entre les lots let II et entre les lots I et III est significative (p < 0,05). La concentration moyenne de PAGI à 15 jours après le vêlage est plus éle'vée significativement chez les vaches ayant un RIU (p < 0,05). L'intervalle V- IAF est de 58, 102 et 143 jours respectivement dans les lots I, II et III. La différence est significative entre les lots pris deux à deux (p <0,05)

Motion correction for PET data using subspace-based real-time MR imaging in simultaneous PET/MR

International audienc

Motion correction for PET data using subspace-based real-time MR imaging in simultaneous PET/MR

International audienc