About the connection between the CℓC_{\ell} power spectrum of the Cosmic Microwave Background and the Γm\Gamma_{m} Fourier spectrum of rings on the sky

In this article we present and study a scaling law of the $m\Gamma_m$ CMB Fourier spectrum on rings which allows us (i) to combine spectra corresponding to different colatitude angles (e.g. several detectors at the focal plane of a telescope), and (ii) to recover the $C_l$ power spectrum once the $\Gamma_m$ coefficients have been measured. This recovery is performed numerically below the 1% level for colatitudes $\Theta> 80^\circ$ degrees. In addition, taking advantage of the smoothness of the $C_l$ and of the $\Gamma_m$, we provide analytical expressions which allow to recover one of the spectrum at the 1% level, the other one being known.Comment: 8 pages, 8 figure

Chronic wounds consultation by telemedicine between a rehabilitation healthcare center and nursing home or home

Saint-Hélier Rehabilitation Center (pôle MPR Saint-Hélier), located in Rennes, has been selected for a regional telemedicine project in 2014 about chronic wounds.AimTo make care access easier for heavy disabilities patients in nursing homes or at home with chronic wounds.MethodThe members of TLM Pl@ies chronic team are specialist doctors and nurses for wounds. On request, the occupational therapist or dietician involve in the consultation (multidisciplinary approach). A secure videoconference (web) is used.ResultsSince July 2014, over 100 teleconsultations have been done. Targeted population is constituted by patients:– whose access to care is decreased due to moving difficulties;– of which the health care team is crossing difficulties in the care process (wound care but also disability, nutrition..).Seventy percent of requests come from the nursing home, 30% from homes (pressure ulcers stages 3 and 4, arterial ulcers, venous or mixed). Middle age: 78 years (20–101 years). Only 3 patients refused. Time to organize the teleconsultation is on average 13 days. Consultations last on average 25 minutes. In 30% of cases the teleconsultation is extended by a real live training time for the nurse at home guided by the TLM Pl@ies chroniques team. We evaluate professional satisfaction and technical satisfaction. Without teleconsultation, in 77% of cases transportation request for consultation would be made, in 5% hospitalization. In 18% no request would be done.Discussion/conclusionThese first results, encouraging, confirms the interest of specialized consultations in medico-social settings, and telemedicine can be an effective solution

The Intrinsic Fundamental Group of a Linear Category

We provide an intrinsic definition of the fundamental group of a linear category over a ring as the automorphism group of the fibre functor on Galois coverings. If the universal covering exists, we prove that this group is isomorphic to the Galois group of the universal covering. The grading deduced from a Galois covering enables us to describe the canonical monomorphism from its automorphism group to the first Hochschild-Mitchell cohomology vector space.Comment: Final version, to appear in Algebras and Representation Theor

The 2mrad crossing angle scheme for the international linear collider

http://cern.ch/AccelConf/e08/papers/mopp005.pdfInternational audienceThe present baseline configuration of the ILC has a 14 mrad crossing angle between the beams at the interaction point. This allows easier extraction of the beams after col- lisions, but imposes on the other hand more constraints on the control of the beams prior to colliding them. More- over, some limitations to physics capabilities arise, in par- ticular because of the degraded very forward electromag- netic detector hermeticity and because calibration proce- dures for (gaseous) tracking detectors become more com- plex. To mitigate these problems, alternative configurations with very small crossing angles are studied. A new version of the 2 mrad layout was designed last year, based on sim- pler concepts and assumptions. The emphasis of this new scheme was to satisfy specifications with as few and feasi- ble magnets as possible, in order to reduce costs

Effect of the non-linear magnetic fields on the emittance growth in the ATF extraction line

WE6PFP075International audienceSince several years, the vertical beam emittance measured in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, has been significantly larger than that measured in the damping ring (DR) itself. The EXT line that transports the beam to the ATF2 Final Focus beam line has been rebuilt, but the extraction itself remains in most part unchanged, with the extracted beam transported off- axis horizontally in two of the quadrupoles, beyond the linear region for one of them. A few other nearby magnets have also modelled or measured non-linearity. In case of a residual vertical beam displacement, this can result in increased vertical emittance through coupling between the two transverse planes. Tracking studies as well as measurements have been carried out to study this effect and the induced sensitivity of beam optical parameters to the trajectory at injection, in view of deriving tolerances for reproducible and stable operation

Automatic Specialization of Protocol Stacks in OS kernels

Awarded best paperInternational audienceFast and optimized protocol stacks play a major role in the performance of network services. This role is especially important in embedded class systems, where performance metrics such as data throughput tend to be limited by the CPU. It is common on such systems, to have protocol stacks that are optimized by hand for better performance and smaller code footprint. In this paper, we propose a strategy to automate this process. Our approach uses program specialization, and enables applications using the network to request specialized code based on the current usage scenario. The specialized code is generated dynamically and loaded in the kernel to be used by the application. We have successfully applied our approach to the TCP/IP implementation in the Linux kernel and used the optimized protocol stack in existing applications. These applications were minimally modied to request the specialization of code based on the current usage context, and to use the specialized code generated instead of its generic version. Specialization can be performed locally, or deferred to a remote specialization server using a novel mechanism [1]. Experiments conducted on three platforms show that the specialized code runs about 25% faster and its size reduces by up to 20 times. The throughput of the protocol stack improves by up to 21%