"WorldFIP Diagnostic Line Driver" (FIPDLD): Derivateur de ligne pour diagnostic sur les reseaux WorldFIP du LHC

Dans le cadre du nouvel accélérateur de particules LHC, le CERN utilise un réseau WorldFIP pour remonter les informations numériques et analogiques liées aux différents systèmes de contrôle de la machine. Compte tenu du grand nombre de segments (plus de 250) et d'agents (plus de 12000), il est nécessaire de s'équiper d'outils facilitant le diagnostic opérationnel sur ces différents réseaux. L'outil principal d'analyse actuel est un PC portable équipé du logiciel FIPWATCHER qui se raccorde au réseau WorldFIP au niveau d'une prise Agent. Pour l'équipe support, un raccordement sur un boîtier de dérivation TAP simplifierait cette connexion et éviterait le débranchement et re-branchement de l'agent pour insérer le dérivateur FIPWATCHER

Haptic guidance improves the visuo-manual tracking of trajectories

BACKGROUND: Learning to perform new movements is usually achieved by following visual demonstrations. Haptic guidance by a force feedback device is a recent and original technology which provides additional proprioceptive cues during visuo-motor learning tasks. The effects of two types of haptic guidances-control in position (HGP) or in force (HGF)-on visuo-manual tracking ("following") of trajectories are still under debate. METHODOLOGY/PRINCIPALS FINDINGS: Three training techniques of haptic guidance (HGP, HGF or control condition, NHG, without haptic guidance) were evaluated in two experiments. Movements produced by adults were assessed in terms of shapes (dynamic time warping) and kinematics criteria (number of velocity peaks and mean velocity) before and after the training sessions. CONCLUSION/SIGNIFICANCE: These results show that the addition of haptic information, probably encoded in force coordinates, play a crucial role on the visuo-manual tracking of new trajectories

Altering gait by way of stimulation of the plantar surface of the foot: the immediate effect of wearing textured insoles in older fallers

Background: Evidence suggests that textured insoles can alter gait and standing balance by way of enhanced plantar tactile stimulation. However, to date, this has not been explored in older people at risk of falling. This study investigated the immediate effect of wearing textured insoles on gait and double-limb standing balance in older fallers.Methods: Thirty older adults >65 years (21 women, mean [SD] age 79.0 [7.1]), with self-reported history of ≥2 falls in the previous year, conducted tests of level-ground walking over 10 m (GAITRite system), and double-limb standing with eyes open and eyes closed over 30 seconds (Kistler force platform) under two conditions: wearing textured insoles (intervention) and smooth (control) insoles in their usual footwear.Results: Wearing textured insoles caused significantly lower gait velocity (P = 0.02), step length (P = 0.04) and stride length (P = 0.03) compared with wearing smooth insoles. No significant differences were found in any of the balance parameters (P > 0.05).Conclusions: A textured insole worn by older adults with a history of falls significantly lowers gait velocity, step length and stride length, suggesting that this population may not have an immediate benefit from this type of intervention. The effects of prolonged wear remain to be investigated

Getting the right balance: insole design alters the static balance of people with diabetes and neuropathy

BACKGROUND: Over 1 in 3 older people with diabetes sustain a fall each year. Postural instability has been identified as independent risk factor for falls within people with Diabetic Peripheral Neuropathy (DPN). People with DPN, at increased risk of falls, are routinely required to wear offloading insoles, yet the impact of these insoles on postural stability and postural control is unknown. The aim of this study was to evaluate the effect of a standard offloading insole and its constituent parts on the balance in people with DPN. METHODS: A random sample of 50 patients with DPN were observed standing for 3 × 30 s, and stepping in response to a light, under five conditions presented in a random order; as defined by a computer program; 1) no insole, 2) standard diabetic: a standard offloading insole made from EVA/poron®, and three other insoles with one design component systematically altered 3) flat: diabetic offloading insole with arch fill removed, 4) low resilient memory: diabetic offloading insole with the cover substituted with low resilience memory V9, 5) textured: diabetic offloading insole with a textured PVC surface added (Algeos Ltd). After each condition participants self-rated perceived steadiness. RESULTS: Insole design effected static balance and balance perception, but not stepping reaction time in people with DPN. The diabetic and memory shaped insoles (with arch fill) significantly increased centre of pressure velocity (14 %, P = 0.006), (13 %, P = 0.001), and path length (14 %, P = 0.006), (13 %, P = 001), when compared to the no insole condition. The textured shaped and flat soft insole had no effect on static balance when compared to the no insole condition (P > 0.05). CONCLUSION: Insoles have an effect on static balance but not stepping reaction time. This effect is independent of neuropathy severity. The addition of a textured cover seems to counter the negative effect of an arch fill, even in participants with severe sensation loss. Static balance is unaffected by material softness or resilience. Current best practice of providing offloading insoles, with arch fill, to increase contact area and reduce peak pressure could be making people more unstable. Whilst flat, soft insoles maybe the preferable design option for those with poor balance. There is a need to develop an offloading insole that can reduce diabetic foot ulcer risk, without compromising balance

Effects of different lower-limb sensory stimulation strategies on postural regulation – A systematic review and meta-analysis

Systematic reviews of balance control have tended to only focus on the effects of single lower-limb stimulation strategies, and a current limitation is the lack of comparison between different relevant stimulation strategies. The aim of this systematic review and meta-analysis was to examine evidence of effects of different lower-limb sensory stimulation strategies on postural regulation and stability. Moderate- to high- pooled effect sizes (Unbiased (Hedges’ g) standardized mean differences (SMD) = 0.31 – 0.66) were observed with the addition of noise in a Stochastic Resonance Stimulation Strategy (SRSS), in three populations (i.e., healthy young adults, older adults, and individuals with lower-limb injuries), and under different task constraints (i.e., unipedal, bipedal, and eyes open). A Textured Material Stimulation Strategy (TMSS) enhanced postural control in the most challenging condition – eyes-closed on a stable surface (SMD = 0.61), and in older adults (SMD = 0.30). The Wearable Garments Stimulation Strategy (WGSS) showed no or adverse effects (SMD = -0.68 – 0.05) under all task constraints and in all populations, except in individuals with lower-limb injuries (SMD = 0.20). Results of our systematic review and meta-analysis revealed that future research could consider combining two or more stimulation strategies in intervention treatments for postural regulation and balance problems, depending on individual need

Procedure de qualification des segments WorldFIP du LHC

Le but de ce document est de décrire et définir la procédure de contrôle et de qualification des segments cuivre des réseaux du LHC afin de livrer aux utilisateurs un réseau fiable et testé (qualification). Pour cela, nous devons disposer d'un ensemble de produits nous permettant de vérifier le bon fonctionnement de chaque point du réseau en partant du manager WorldFIP jusqu'au dernier Agent et en passant par les répéteurs, ligne optique , TAPs...

Outils d'acces aux donnees d'un PLC "Automate Web Access (AWA)"

Cette note presente un moniteur d'acces aux donnees d'un PLC Schneider ou Siemens, pouvant fonctionner sur n'importe quelle plateforme (Windows, Linux...) equipee d'un navigateur WEB sans telechargement de logiciel ("Applets")

Test en radiation du répéteur Cu/Cu WorldFIP

Le répéteur FIP RP 131-RT 8CC3 est dédié au réseau WorldFIP du LHC et fonctionnera dans un environnement radioactif. Il est de ce fait conçu pour être de type "durci aux radiations". Comme il pourra être implanté dans la machine LHC loin des points chauds (aimants, collimateurs, etc...) la dose maximale estimée ne dépassera théoriquement pas 10 et 20 Gy/an, soit une moyenne 15 Gy/an. Prévu pour une durée de vie de 15 ans, le répéteur FIP RP 131-RT 8CC3 a été conçu pour supporter une dose totale de 225 Gy