654 research outputs found
Investigating the Piaggio Avanti design using CEASIOM
No full textIn early steps of aircraft design the unification of configuration definition is important to avoid user–input errors. Also coupling with each other can strengthen different tools with different specifications simultaneously provided that the geometry definition is transferred with minimum data loss. This is vitally useful especially when geometry data is transferred in order to perform high–fidelity analysis. This paper reports the analysis for the pitch control of a three–lifting–surface aircraft Piaggio Avanti using CEASIOM, a tool–chain software for aircraft preliminary design, with the baseline configuration coming from the conceptual design code AAA, linked by a common name–space CPACS for the means of data collaboratio
Designing aircraft in Italy; internship at Piaggio Aero Industries
No full textFrom October 2012 to January 2013, I went to the south of Italy to do my internship at Piaggio, the company famous for manufacturing the P.180 Avanti business aircraft. The office where I was located was in Pozzuoli, a town just outside the city of Naples, in the shadow of Mount Vesuvius.Aerospace Engineerin
Premessa
No full textPremessa al volume dedicato all'attività di Antonio Piaggio come calligrafo e miniatore oltre che come inventore della celebre macchina per lo svoglimento dei papiri ercolanesi
Escort Tug Hydrodynamic Forces Estimation in a Design Framework: From Model Test to Manoeuvrability Simulation
No full textThe manoeuvring capabilities of an escort tug are essential key-features with a view to an all-around design approach devoted to an optimum oriented framework. From the hull geometry settlement and propulsive solution definition, the ability to predict thoroughly the operative life in terms of handling, effectiveness, and safety becomes fundamental, even more with the perspective of developing smart control logics supporting the masters. With such an aim, the availability of a reliable manoeuvrability model is of fundamental importance. In this context, it is important to define an optimum set of captive manoeuvrability tests, whether experimental or numerical, in order to correctly identify the vessel escort performances in simulation; this, always keeping in mind the necessity to limit the effort in view of an application at an early-design stage. Starting from a wide experimental matrix, purposely designed and realized, the present investigation focuses on the quality and robustness of the different regression manoeuvrability models by letting vary the subsets of tests, in order to individuate, finally, which is the most suitable hull model to be adopted and which is the minimum set to be performed
Su di un caso di impotentia coeundi post-traumatica in soggetto di sesso maschile: riscontro a fini medico legali
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The post-genomic era: workshop on chromatin immunoprecipitation-related techniques
No full text[No abstract available
Manoeuvring model and simulation of the non-linear dynamic interaction between tethered ship and tug during escort
No full textWhen dealing with towing and Escort operations – indissolubly – a wider and complete modelling of the involved dynamics becomes fundamental, on both ship and tug side, even more so making unavoidable the need of correctly ponder the cables constraining coupling. With the aim to better understand the
peculiarities of tug-ship interaction, a 6-DOF time domain simulator comprehensive of the propulsion dynamics has been developed, across the inter-connection imposed by the towing-line. Particular attention is focused on discovering the operational capabilities of the tug in exerting a force on the assisted ship during Escort, and the subsequent great influence that the reaction makes on the tug handling and effectiveness. A conceptual and critical discussion stands out, preparing the ground to future design strategies and hinting different solutions to be investigated, directly facing the operative profile of the vessel
Exploring mania-associated white matter injury by comparison with multiple sclerosis: a diffusion tensor imaging study
No full textBipolar disorder (BD), especially in its active phases, has shown some neuroimaging and immunological similarities with multiple sclerosis (MS). The objective of this study was to compare white matter (WM) alterations in BD patients in manic phase (M-BD) and MS patients at early stage of disease and with low lesion burden. We compared diffusion tensor imaging (DTI)-derived fractional anisotropy (FA), mean diffusivity (MD) and radial diffusivity (RD) in a priori selected WM regions (i.e., corpus callosum and cingulum) betwixt 23 M-BD, 23 MS patients and 46 healthy controls. Both M-BD and MS showed WM changes in the corpus callosum, which, however, showed a greater impairment in MS patients. However, considering the different sub-regions of corpus callosum separately (i.e., genu, body, splenium), M-BD and MS presented an opposite pattern in spatial distribution of WM microstructure alterations, with a greater impairment in the anterior region in M-BD and in the posterior region in MS. Common features as well as divergent patterns in DTI changes are detected in M-BD and early MS, prompting a deeper investigation of analogies and differences in WM and immunological alterations of these disorders
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