1,721,025 research outputs found
Performance Analysis of Strain Gauges in Partial Configuration
No full textIn the Mechanical Measurement laboratory of the University of Cagliari, together with
other universities, they are studying some results relating to the use of E.R. strain gauges
photo-etched to Davies’ bars.
The use of such sensors in a partially bonded version is framed and presented in this study.
The aim of this work is to verify the applicability of the partialization by means of
experimental determinations, both in a static and dynamic condition.
The Results drawn in a dynamic condition prove that the length of time of a free dynamic
evolution of unbounded strain gauges is rather long, in the order of the ms and nearly
unrelated to the dimension under stress
Interactive lessons in the university hall. Increase attention and participation using the students' devices (BYOD) [Lezioni interattive nell'aula universitaria. Aumentare l'attenzione e la partecipazione usando i dispositivi degli studenti (BYOD)]
No full textIl contributo presenta una esperienza pilota svolta all’Università di Cagliari con gli studenti di “Fisica tecnica ambientale” del corso di laurea in Scienze dell’Architettura. Nel tentativo di rendere più produttiva e, allo stesso tempo, meno faticosa la frequenza delle lezioni teoriche durante l’anno accademico 2014/15 si è sperimentato l’uso di sequenze di domande e risposte (questioning method of instruction) gestite con e senza le tecnologie. Il lavoro, che proseguirà il prossimo anno, si è concentrato sulla valutazione dei livelli di accettabilità della proposta da parte degli studenti
Lezioni interattive nell’aula universitaria. Aumentare l’attenzione e la partecipazione usando i dispositivi degli studenti (BYOD)
No full textIl contributo presenta una esperienza pilota svolta all’Università di Cagliari con gli studenti di “Fisica tecnica ambientale” del corso di laurea in Scienze dell’Architettura. Nel tentativo di rendere più produttiva e, allo stesso tempo, meno faticosa la frequenza delle lezioni teoriche durante l’anno accademico 2014/15 si è sperimentato l’uso di sequenze di domande e risposte gestite con e senza le tecnologie. Il lavoro, che proseguirà il prossimo anno, si è concentrato sull’accettabilità da parte degli studenti
A Saffron Flower Harvesting and Spice Separation System
No full textThis paper is concerned with the design and characterization of a saffron flower harvesting and spice separation system. The system is a workable integrated system to obtain the spice for drying and packaging final phases of spice production.
The main parts of the system are represented by a harvesting portable device and a double flow three way cyclone separator.
The mechanical operating principle of the harvesting portable device and the working way of the double flow three way cyclone are described. Experimental characterisation illustrates in the paper the mechanical and fluid dynamics behaviour of harvesting and separating device
Mechanization in harvesting saffron: an opportunity for economic development in Sardinia
No full textIn last decades it can be seen a strong growth of the biologic sector. In UE and USA in last years about 15-20 millions of Euro is the market value.
The Sardinian Saffron spice DOP is certainty a biologic product. The saffron spice production is actually marginal because of high cost of the production phases, overall the harvesting phase of the flower on field, that is completely made by hand. The saffron harvesting mechanization is a winning chance also under a socio-economic point of view.
A good answer to the too high harvesting and separating phases costs, is an integrated system to obtain the spice stigmas for successive drying and packaging phases of production. Main parts of the system are the harvesting device and the double cyclone separator plant. Two harvesting devices will be described, presenting the operating principle and describing the performances on field; in addition, the double flow cyclone separator will be described and the performances will be evaluated, presenting a statistical overview of the on field activity
Metodo e sistema di valutazione e controllo delle condizioni di comfort climatico abitativo
No full text- …
