Initial deployments of LTE networks are based on so-called homogeneous networks consisting of base stations providing basic coverage, called macro base stations. The concept of heterogeneous networks has recently attracted considerable attention to optimize performance particularly for unequal user or traffic distribution. Here, the layer of planned highpower macro eNBs is overlaid with layers ...

The signal and limitations of calcium florescence imaging using nonresonant multiphoton absorption of near-infrared femto- and picosecond laser pulses were examined. The fluorescence changes of various Ca(2+)-indicators induced by transient increases of the intradendritic calcium concentration were evaluated by evoking physiological activity in neocortical neurons in rat brain slices. Photodama...

Prognostics and health management (PHM) methods aim at detecting the degradation, diagnosing the faults and predicting the time at which a system or a component will no longer perform its desired function. PHM is based on access to a model of a system or a component using one or combination of physical or data driven models. In physical based models one has to gather a lot of knowledge about th...

Temporal coherence is one of the most fundamental characteristics of light, connecting to spectral information through the Fourier transform relationship between time and frequency. Interferometers with a variable path-length difference (PLD) between the two branches have widely been employed to characterize temporal coherence properties for broad spectral regimes. Hard X-ray interferometers re...

Femto-second laser writing was used to fabricate waveguides in KTP with losses below 0.8 dB/cm. They were used for efficient broad bandwidth, Type II frequency doubling of cw Ti-sapphire laser radiation at 1080.4 nm. Keywords; laser written waveguides, low loss, broad bandwidth, KTP, type II frequency doubling

Intercell interference is one of the most challenging issues in femtocell deployment under the coverage of existing macrocell. Allocation of resources between femtocell and macrocell is essential to counter the effects of interference in dense femtocell networks. Advances in resource management strategies have improved the control mechanism for interference reduction at lower node density, but ...

Let (M,F) be a compact Riemannian foliated manifold, equipped with a bundlelike metric gM . We will also use the following notation: N ∗F is the conormal bundle to F , G is the holonomy groupoid of F . In Introduction, we will formulate our main results for the geometric case of the transverse signature operator, referring the reader to the main body of the paper for the formulations in the cas...

PURPOSE To evaluate the relative effectiveness and safety of LASIK using the Femto LDV (Ziemer Ophthalmic Systems AG) and IntraLase FS 60 (Abbott Medical Optics Inc) femtosecond lasers in patients with corneal opacity. METHODS Patients with corneal opacity were retrospectively selected between March and July 2009. For this study, 205 eyes with 90-μm corneal flaps created using the Femto LDV (...

This paper deals with a historical overview of the activities of the French FEMTO-ST institute in the field of microrobotic manipulation and assembly. It firstly shows tools developped for fine and coarse positioning: microgrippers, 2 DoF modules and smart surfces. The paper then goes on the automation of tridimensional microassembly of objects measuring between 10 microns and 400 microns. We a...

1 Department of Mathematics, Imperial College London, London, United Kingdom, 2 Department of Mathematical Sciences, University of Liverpool, Liverpool, United Kingdom, 3 MN2S, Femto-st Besancon, Besancon, France, 4 Aix-Marseille Université, Centrale Marseille, Institut Fresnel-CNRS (UMR 7249), Marseille, France, 5 ISTerre, CNRS, Université Grenoble Alpes, Grenoble, France, 6 Hap2U, CIME Nanote...