1,721,174 research outputs found
Municipalia. Storia della tutela, vol. 2. Patrimonio artistico e identità locali: Pisa, Forlì e altri casi (sec. XIX-XX)
No full text
Il degrado meccanico in laminati compositi in fibra di carbonio sollecitati con prove a carico ripetuto e progressivo (test CRP)
No full textA simple route for additive manufacturing of 316L stainless steel via Fused Filament Fabrication
No full text
Potentiometric Sensing by means of Self-tuning RFID ICs
No full textRecently introduced autotuning RFID ICs can provide digital information on the change in the local boundary conditions in the close surrounding of the tag. By exploiting this feature in combination with a varactor diode, a general framework for the controlled sensing of a chemical agent can be achieved. The varactor acts as a transducer converting the potentiometric output of a chemical sensor into a capacitance change that produces in turn a mismatch between the antenna and the IC. Closed-form expressions relate the digital output of the IC to said chemical variation so that it is well mapped within the retuning dynamic range. The method is demonstrated with reference to a pH sensor and looks promising to provide a sensitivity of 18 units per unitary change of the pH and could be read up to 2 m
PEEK -TiO2 composites with enhanced UV resistance
No full textIn the paper, extruded filaments of polyetheretherketone (PEEK) filled (1%v, 3%v, 5%v) with sub-micrometric titanium dioxide (TiO2) particles have been manufactured with the aim to increase the UV radiation resistance of PEEK matrix. The TiO2 particles affect crystallinity of PEEK matrix as it increases increasing filler content. The filler presence slightly increases the stiffness and the elastic modulus of resulting composites and does not influence largely the tensile strength but show an influence on the elongation at break enhancing a finger like failure mechanism ascribed to microcracks propagation and interspherulitc fracture. UV aging test showed the effectiveness of TiO2 particles in reducing the photo-degradation effect especially in 5%v filled sample resulting the most effective formulation. For this formulation, after UV aging the mechanical properties and the failure mechanism remains unchanged while the neat PEEK sample shows embrittlement and loss of ductility
Develop of testing procedure for damage threshold evaluation in glass fiber thermosetting composites.
No full text- …
