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Given the difficulty of invasive methods to assess muscle action during natural human movement, surface electromyography (sEMG) has been increasingly used to capture muscle activity in relation to kinesiological analysis of specific tasks. Isolated isometric, concentric and eccentric forms of muscle action have been receiving the most attention for research purposes. Nevertheless natural muscle action...
In 2007 the Italian Ministry of Education identified the need of raising a new Humanism: students must receive adequate tools for knowledge, but must also understand and be able to handle the increasingly frequent transitions and changes they have to face as citizens and individuals. Orientation during the developmental phase must, hence, allow students to acquire all those key and context-independent...
The overall objective of this proposal is to build an advanced and original prototype specifically devoted to seafloor and water-column monitoring as starting Italian contribution to the further development of the EMSO Ligurian Sea node. In detail the aim of the observatory is to ensure realtime continuous acquisition of geophysical, oceanographic and biological data by a cable system from a marine...
A novel nano-structured material has been assembled by means of a focused ion beam technique. This artificial material is composed of a square array of nano-helices built upon a multilayered substrate. Optical measurements of circular dichroism of a sample are confirmed by photo-acoustic investigations, which allow to directly study the helix-field interaction apart from the dielectric substrate....
In this work we examine the properties of surface plasmon polaritons that are being formed in a 2D periodic array of nanoholes etched in gold/chromium layer upon a glass substrate. We apply very simple and accurate photo-acoustic technique to measure the absorption of the periodic structure. The experimental results are in a good agreement with the simulations. In order to better understand the confinement...
Regular array of plasmonic nanoantennas (nanocrescents) can be easily produced by grazing evaporating gold on a self-ordered surface formed by hexagonal arrangements of polystyrene nanospheres, thus realising a hybrid plasmonic-photonics nanostructures (HPPN). By using second harmonic generation (SHG) technique we experimentally demonstrated that asymmetry in the shape of the nanoantennas induces...
Low cost concept based on the porous silicon technology is shown to be well suitable for integrating monolithically the photonic devices on a standard silicon wafers by using localized SOI structures fabricated by electrochemical anodization of silicon wafers followed by thermal oxidation of porous silicon. The new approach consists in realizing buried localized porous oxidized silicon by exploiting...
Artificial circular dichroism [1] is investigated for developing novel devices for active polarization controllers, like rotators and modulators and high efficient molecular sensors. Here we show the chiral behavior raised by metal (Au) nanostructures on dielectric (polystyrene, PS) nanosphere substrate produced by a self assembled procedure that guarantees large area fabrication with low time consuming...
We report on recently achieved theoretical and experimental results concerning nonlinear optical effects in micro and nano structures. We considered second order nonlinearities mainly focusing on second harmonic generation and entangled photon pairs emission by spontaneous parametric down conversion. Different geometries have been investigated: multilayer dielectric stacks, metallo-dielectric stacks,...
The nonlinear optical properties of subwavelength patterned metallic structures have been recently re-analyzed. We developed a Green function based numerical method in order to calculate the second harmonic field pattern generated by a finite number of two dimensional single and double metallic rods of arbitrary shape. We modelled the optical response of Au considering contributions from both free...
The growing incidence of microbial infections and the increasing ability of such organisms to acquire resistance to antimicrobial treatment lead the requirement of fast bacteria and fungi identification methods. In this work we explored optical spectroscopic techniques on fungal identification. We show that some fungal infections can be identified by ultraviolet optical excitation of fungi fluorescence...
Here, a systematic study is made of the leakage current in huge-area SiGe-Si p+-n junctions. As will be shown, both the perimeter and area leakage current density are a sensitive function of the S/D etch depth, whereby a higher leakage is obtained for deeper trenches. This can be explained by the presence of dislocations at the SiGe-Si interface, as revealed by transmission electron microscopy (TEM)...
The key result in this work is the experimental demonstration that adding Yb to Ni FUSI allows for tuning the work function (WF) from midgap (NiSi ~4.72 eV) to n-type band-edge (~4.22 eV) on thin SiON, maintaining same EOT. In addition, we did not observe any interface adhesion issues found in other reports when WF is modulated by dopants such as As or Sb. We also show that reliability is similar...
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