1,721,679 research outputs found
Determination of the mechanical behaviour of agricultural soil by numerical simulation
No full textIn this work a numerical modelling of an agricultural soil by mean the soil shear stress tests simulation has been performed. A soil shearometer available on the market has been used to perform soil shear yests. A special equipment has been realized that has allowed the automated detecting of the soil shear stress
Study of soil-plough moulboard interaction
No full textIn this report a numerical simulation of the interaction between soil and plough mouldboard has been performed by mean a 3D-free- surface model as well as a medium soil with constitutive relationship of Non-newtonian pseudo-plastic materia
Studio policentrico di monitorizzazione computerizzata post-operatoria
No full textNell'ambito di uno studio policentrico viene valutata la fattibilità ed efficacia della monitorizzazionen computerizzata post-operatori
Optimization of a device for a fumigation process
No full textAn equipment was designed and realized that has allowed to perform the fumigating process optimization for the foodstuff. The equipment, easy to use, allow to exhaust completely the Magnesium of alluminium phosphide pellets and to reduce the phosphine production time from 5 days to 2 days. In addition it is particularly convenient during the fumigazion in cold periods
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Vibration-based experimental identification of the elastic moduli using plate specimens of the olive tree
No full textAbstract View references (40)
Mechanical parameters of the olive wood plate have been computed by data inversion of vibrational experimental tests. A numerical-experimental method has allowed the evaluation of the two transverse shear moduli and the four in-plane moduli of a thick orthotropic olive tree plate. Therefore, the natural flexural vibration frequencies of olive trees plates have been evaluated by the impulse technique. For our purposes, we define the objective function as the difference between the numerical computation data and the experimental ones. The Levenberg-Marquardt algorithm was chosen as optimization strategy in order to minimize the matching error: the evaluation of the objective function has required a complete finite element simulation by using the ANSYS code. As input, we have used the uniaxial test data results obtained from the olive plates. The converged elastic moduli with n = 10 natural modes were E1 = 14.8 GPa, E2 = 1.04 GPa, G12 = 4.45 GPa, G23 = 4.02 GPa, G13 = 4.75 GPa, ν12 = 0.42, and ν13 = 0.42. The relative root mean square (RMS) errors between the experimental frequencies and the computed one is 9.40%. Then, it has been possible to obtain a good agreement between the measured and calculated frequencies. Therefore, it has been found that for plates of moderate thickness the reliability of the estimated values of the transverse shear moduli is good
Physiopathology of the total gastrectomy syndrome [FISIOPATOLOGIA DELLA SINDROME DA AGASTRIA]
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