44 research outputs found
Valutazione del rischio e vulnerabilità degli acquiferi - protezione dell'acquifero delle Sorgenti del Peschiera
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Plan for the evaluation of the vulnerability of the carbonate basin of the Peschiera springs, and for the protection of the relevant important aquifer
No full textApplicazioni della geochimica tradizionale ed isotopica allo studio del sistema idrogeologico delle Sorgenti del Maira.
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Applicazione del sistema parametrico SINTACS alla valutazione della vulnerabilità intrinseca degli acquiferi nel bacino intrappenninico del Valdarno medio
No full textViene illustrata, per la pianura alluvionale del Valdarno Medio, la metodologia di raccolta dei dati idrogeologici e di valutazione della vulnerabilità intrinseca con metodo parametrico a punteggi e pesi SINTACS
Performance analysis of a tractor - power harrow system under different working conditions
No full textTillage is one of the most important operations in the preparation of land for growing crops. Among secondary tillage implements, power harrows, which have a series of PTO-driven rotors which rotate about their vertical axis, are widely adopted in soil-working operations. Typically, this kind of implement is highly energy consuming, due to the heavy mechanical loads required to pull the harrow and the PTO (Power Take-Off) torque needed to drive the rotors. This paper reports the results of extensive in-field experimentation in which the relationship between the operating conditions of a tractor - power harrow system and the mechanical loads (i.e. PTO torque and draught) were investigated in two different test site fields. The test parameters consisted of: nominal tractor speed (3, 6, 9 and 12 km h−1), nominal working depth (6, 9 and 15 cm) and rotor speed (285 and 411 rpm) at a PTO speed of 1000 rpm. The data was statistically analysed by means of a linear mixed effect model to assess the differences in the tractor - harrow system performances measured under different working conditions. The presented results show which operating conditions can be favourable regarding energy and fuel consumption as this information may be very useful to farmers to reduce costs. Moreover, the measured mechanical loads concerning PTO torque and draught may also be beneficial for manufacturers to improve the design of these kinds of implements
The dreaming brain/mind, consciousness and psychosis
No full textSeveral independent lines of research in neurobiology seem to support the phenomenologically-grounded view of the dreaming brain/mind as a useful model for psychosis. Hallucinatory phenomena and thought disorders found in psychosis share several peculiarities with dreaming, where internally generated, vivid sensorimotor imagery along with often heightened and incongruous emotion are paired with a decrease in ego functions which ultimately leads to a severe impairment in reality testing. Contemporary conceptualizations of severe mental disorders view psychosis as one psychopathological dimension that may be found across several diagnostic categories. Some experimental data have shown cognitive bizarreness to be equally elevated in dreams and in the waking cognition of acutely psychotic subjects and in patients treated with pro-dopaminergic drugs, independent of the underlying disorder. Further studies into the neurofunctional underpinnings of both conditions will help to clarify the use and validity of this model
Software-Based On-Line Test of Communication Peripherals in Processor-Based Systems for Automotive Applications
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