1,721,288 research outputs found
Dino Puncuh (a cura di) Storia di Genova Mediterraneo, Europa, Atlantico, Società Ligure di Storia Patria, Genova 2003. pp. 684.
No full textRecension
Numerical Investigations on the Working Cycle of a Hydraulic Breaker: Off-Design Performance and Influence of Design Parameters
No full textThis paper deals with theoretical considerations and numerical simulations concerning the working behaviour of a
hydraulic breaker. At first, some formulations coming from sufficiently reasonable considerations on the working principle
of the breaker, based on the hypothesis of the motion of the striking mass as uniformly accelerated, are proposed.
Later, a previously realized parameterised model is used in order to investigate the influence of the inlet flow rate and
of the most important design parameters on the behaviour of the machine. This analysis allows the characterization of
these parameters affecting breaker performance, suggesting possible design improvements which may lead to better
performance in terms of both impact energy and efficiency
Modello per un Sistema di Comunicazione per un Sistema a Rilascio Controllato di Farmaco
No full textLARVA Anisakis IN Sepia officinalis DEL MEDITERRANEO
No full textThe Authors report, for the first time, thepresence of an Anisakis larva in one specimenof Sepia officinalis, describing thecharacteristics of parasitic localization coexisting,moreover, with an Aggregata sp. infection. The AA conclude with some sanitaryand inspective considerations[...
The Effects of Distributor and Striking Mass on the Performance of a Hydraulic Impact Machine
No full textThis paper deals with numerical investigations
concerning the working behavior of a hydraulic impact
machine. Attention is focused on the moving elements
inside the casing of the breaker, taking the main targets
to be achieved by the designer into account. On one
hand, there is the operating performance optimization,
with particular care devoted to the impact energy of the
breaker; on the other hand, the energy conversion
efficiency, related to the power transmission, in order to
minimize the power requirement to the feeding system.
Use of a parameterized numerical model is made in
order to better understand the effects of parameters
characteristic of distributor and striking mass on breaker
performance and to achieve possible improvements in
both impact energy and efficiency. The key-variable,
which leads to better performance, is found to be the
working pressure
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
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