Search results for "metrica"
showing 10 items of 196 documents
Il portico meridionale della Cattedrale di Palermo : corrispondenze geometriche tra decorazione e architettura
2020
Negli ultimi venti anni si sono diffusi, prima nei centri di ricerca e poi in modo più capillare, scanner tridimensionali e procedure fotogrammetriche capaci di generare simulacri digitali tridimensionali di manufatti. L’uso di strumenti digitali per il rilievo e la rappresentazione di opere d’arte e di architettura ha profondamente trasformato procedure e metodi storicamente consolidati e al contempo ha offerto nuove possibilità di indagine. La possibilità di misurare e sezionare, nello spazio virtuale dei software di rappresentazione, avatar digitali che documentano in modo dettagliato la morfologia e le qualità cromatiche di un artefatto, ha aperto nuove prospettive alle indagini sulle m…
Influence of oscillating main flow on separation efficiency in asymmetrical flow field-flow fractionation.
2021
The steadily rising interest in the investigation of interactions between nanomaterials and biological media has also led to an increasing interest in asymmetrical flow field-flow fractionation (AF-FFF). The biggest strength of AF-FFF is the possibility to alter the flow profiles to suit a specific separation problem. In this paper, the influence of an oscillating main flow on the separation efficiency of AF-FFF is investigated. Such oscillations can e.g. be caused by the main pump To investigate the influence of such flow conditions on the separation efficiency in AF-FFF systematically, different oscillation profiles were applied and their influence on the elution profile and the retention…
USO DEI PARAMETRI POSIZIONALI E DELL’ANALISI CITOMETRICA MULTIPARAMETRICA PER IDENTIFICARE I CASI DI LEUCEMIA LINFATICA CRONICA
2013
Rileggendo il «Within piscator» di Letaldo di Micy
2017
Il saggio propone una presentazione complessiva del «Within piscator» («De quodam piscatore quem ballena absorbuit»), poemetto latino del X secolo comunemente attribuito a Letaldo di Micy. La disamina dell’opera si sviluppa in varie direzioni: tradizione manoscritta ed edizioni critiche; vita e opere di Letaldo di Micy; rapporti con la tradizione classica, biblica e cristiana; "status quaestionis" e interpretazioni critiche; problemi testuali e filologici; lingua e stile; metrica e versificazione. This essay offers a comprehensive analysis of the «Within piscator» («De quodam piscatore quem ballena absorbuit»), latin short poem of the Xth century, commonly attributed to Letaldus of Micy. Th…
Efficient formulation of a two-noded geometrically exact curved beam element
2021
The article extends the formulation of a 2D geometrically exact beam element proposed by Jirasek et al. (2021) to curved elastic beams. This formulation is based on equilibrium equations in their integrated form, combined with the kinematic relations and sectional equations that link the internal forces to sectional deformation variables. The resulting first-order differential equations are approximated by the finite difference scheme and the boundary value problem is converted to an initial value problem using the shooting method. The article develops the theoretical framework based on the Navier-Bernoulli hypothesis, with a possible extension to shear-flexible beams. Numerical procedures …
The use of slightly asymmetrical windings for rotating electrical machines
2018
Historically, asymmetrical windings in electrical machines have been rarely used and only for specified needs, because the adoption of symmetrical configurations has always been considered the only solution during the design stage of electrical machines. The aim of this work is to demonstrate with several examples that the use of slightly asymmetrical windings can be a reasonable choice and, in certain cases, a favorable option during the machine design stage, allowing the possibility of selecting a wider range of slot/pole number combinations, without affecting the performances of the machines. More in detail, an interior permanent magnet synchronous machine equipped with a symmetrical 3-p…
A survey on geometrical reconstruction as a core technology to sketch-based modeling
2005
In this work, the background and evolution of three-dimensional reconstruction of line drawings during the last 30 years is discussed. A new general taxonomy is proposed to make apparent and discuss the historical evolution of geometrical reconstruction and their challenges. The evolution of geometrical reconstruction from recovering know-how stored in engineering drawings to sketch-based modeling for helping in the first steps of conceptual design purposes, and the current challenges of geometrical reconstruction are discussed too.
A General Mathematical Formulation for Winding Layout Arrangement of Electrical Machines
2018
Winding design methods have been a subject of research for many years of the past century. Many methods have been developed, each one characterized by some advantages and drawbacks. Nowadays, the star of slots is the most widespread design tool for electrical machine windings. In this context, this paper presents a simple and effective procedure to determine the distribution of the slot EMFs over the phases and of the winding configuration in all possible typologies of electrical machines equipped with symmetrical windings. The result of this procedure gives a Winding Distribution Table (WDT), which can be used to define coils and coil groups connections and also to simply implement winding…
A General Investigation on the Differential Leakage Factor for Symmetrical and Asymmetrical Multiphase Winding Design
2020
This work provides an investigation based on a fast estimation of the degree of unbalance (D.U.%) and the differential leakage factor (&sigma
Variable kinematics models and finite elements for nonlinear analysis of multilayered smart plates
2015
Abstract A variable kinematics approach for moderately large deflection analysis of smart magneto-electro-elastic multilayered plates is presented. The approach is based on the condensation of the electro-magnetic state into the plate kinematics, whose nonlinear strain–displacement relationships are expressed in the von Karman sense. This leads to models resulting in an effective mechanical plate, which takes the multifield coupling effects into account by the plate stiffness, inertia and loading characteristics, consistently defined as combinations of the layers material properties. By a unified approach, both equivalent single layer and layerwise models are developed formulating the assoc…