177,844 research outputs found
Il bisturi di Mazzoli sul corpus di Seneca tragico
No full textRecensione a G. Mazzoli, «Il chaos e le sue architetture» (Palumbo), che raccoglie trent’anni di studi esemplari. Giancarlo Mazzoli restituisce un’idea coerente, complessa ma non contraddittoria, di Seneca tragico
Strumenti finanziari negoziabili e incentivo-compatibili per le imprese cooperative. Alcune considerazioni teoriche e di policy
No full textIncentive-Compatible Financial Instruments for CoOperative Firms: a Few Policy Considerations
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Progettazione di Placche Craniche Personalizzate usando Tecnologie SFF e Sistemi di Modellazione Haptic
No full textRepairing severe human skull injuries requires customized cranial implants. Trauma and cranial tumors are the main causes for large cranial defects. The success of the reconstructive cranial surgery depends on diverse aspects regarding the preoperative evaluation of the defect, the design and manufacturing of the implant and the execution of the operation. Currently, the design of membranes is mainly a manual work, even with the use of CAD facilities, and results in a time-consuming and user-dependent skull reconstruction.
This paper presents a critical review of a design methodology for custom-made cranioplasty plates in a PHANToM®-based haptic environment and the possibility to manufacture the same using Solid Freeform Fabrication technologies
A method for performance evaluation of RE/RP systems in dentistry
No full textPurpose - The purpose of this paper is to investigate a method for comparing the scanning and reproducing accuracy of highly shaped objects like plaster casts used in dentistry. Design/methodology/approach - Theoretical considerations on errors introduced by the scanning systems and subsequent point clouds data elaboration have led to a method to estimate the accuracy of the whole process. Suitable indices have been chosen and computed at each stage. As a final result, the overall chain, scanning and reproducing systems can be assessed. In order to validate the proposed method casts have been scanned by means of commercial systems and then reproduced by using different rapid prototyping technologies, materials and parameters. Error indices have been computed and reported. Findings - Since it is not possible to define reliable and meaningful reference models for non-standard shapes, an absolute accuracy value for the scanning process cannot be stated. Anyway the proposed method, thanks to relative performance indices, allows the comparison of different acquisition systems and the evaluation of the most performing manufacturing chain. Practical implications - The study provides a method to assess the relative performance between commercial systems both in scanning and reproducing stage. Originality/value - In literature, some studies on the accuracy of scanning devices have been found but they are based on standard geometrical features. In this paper, the problem of complex shapes in absence of reference model is addressed instead
Prefazione. Lo sfondo delle cose
No full textIl rapporto figura/sfondo applicato allo studio del consumo e degli oggetti quotidiani
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