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The Role of Tension Stiffening in the Numerical Nonliner Analysis of Reinforced Concrete Frames
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InP Monolithically Integrated Transmitters Based on High Speed Directly Modulated DFB Lasers
No full textIn this paper we summarize results concerning high-speed integrated multi-wavelength transmitters fabricated using a generic InP integration platform. The photonic integrated circuits (PICs) include tunable directly modulated DFB lasers emitting in the C-band, monitoring photodetectors, MMI couplers and output spot size converters. The directly modulated lasers, designed in order to fit within a 100 GHz grid, show a maximum 3-dB small signal bandwidth of 21 GHz and a tunability range of about 4 nm. In particular, we report an 8-channel transmitter showing operation up to 30 Gb/s per channel (for 200+ Gb/s applications) and a 4-channel transmitter capable of operating up to 34 Gb/s per channel (for 100+ Gb/s applications). Error free operation (bit error rates <10-9) is achieved for all the channels in all the cases
Ottimizzazione di Modelli Strut-and-Tie nel Progetto di Travi Alte in Calcestruzzo Armato
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The heightening of an old masonry gravity dam
No full textThis paper illustrates the principal aspects of the study for the heightening intervention of a masonry gravity dam built in 1930. So far the dam has been utilized as flood control reservoir with normally empty basin; now a functional modification is needed in order to employ the structure for both control floods and water supply. Heightening of the maximum water level is thus requested. The suggested solution consists of a concrete wall close to the upstream face. The new structure becomes complex [1] and the study of the coupling between the wall and the dam requires the adoption of the Finite Element Method, carrying out both mechanical and hydraulic models including portion of the foundation rock
Comparison between steady and complete dynamic procedures to assess wind action on structures with different geometric sizes and flexibility
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