IRIS - UNIRSM (Univ. degli Studi della Repubblica di San Marino)
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From 0 to 20. An evolutionary analysis of Open Design and Open Manufacturing
No full textThe paper presents an analysis of the evolution of Open Design and Open Manufacturing from 2000 to 2020. The two phenomena are examined by taking into account real experiences in these fields in order to track the most relevant developments. The first step of the research consisted in the identification of the best-known and most often-
cited experiences, which have been collected into four different subsets, according to their type, and organized into a chronological visualization. The second step of the research involved the identification and description of three case studies, one for each of the
main types: Instructables, OpenStructures and Precious Plastics. Finally, the
paper identifies three main time frames, and expresses the constructive and the critical aspects of the two open processes, concluding with a speculation on three possible futures
Innovation models in food industry: A review of the literature
No full textInnovation is considered as one of the main elements of a company success. In recent years, it has assumed a relevant role also in the food industry that was generally defined as a rather mature and slow-going sector. The aim of this paper is to analyse the innovation models applied to the food industry and to carry out a systematic review of the literature. In particular, we overview the most relevant innovation models and identify the main thematic areas discussed in the period from 2016 to 2020. We also provide recommendations for future research directions
Buckling analysis of three-phase CNT/polymer/fiber functionally graded orthotropic plates: Influence of the non-uniform distribution of the oriented fibers on the critical load
No full textThe current paper aims to analyze the influence on the critical buckling loads of the non-uniform distribution of the oriented fibers along the thickness direction of three-phase CNT/polymer/fiber functionally graded orthotropic plates. The various plies of the laminated plates are reinforced by both carbon nanotube (CNT) particles and conventional oriented straight fibers. The orthotropic features of such layers are provided by the reinforcing fibers which are functionally graded (FG) along the thickness coordinate. In the literature, CNTs represent generally the sole reinforcing phase and are assumed aligned and graded in the thickness direction. Here, instead, CNTs are randomly oriented and uniformly scattered in the matrix, whose properties are further improved by aligned, graded, straight and oriented fibers. A general power-law function is introduced to define the non-uniform features instead of the usual patterns presented in the literature (such as FG-X and FG-O), which can be included in the proposed approach as particular cases. The current methodology is tested through the comparison with the results available in the literature. The validation procedure is carried out for two-phases composites, considering also CNTs as straight and aligned reinforcing fibers, characterized by both uniform and graded properties. Several boundary conditions are also analyzed and verified. As proven by the numerical results illustrated in the paper, the variation of the through-the-thickness distribution of the fiber volume fraction is able to change noticeably the value of both uniaxial and biaxial critical buckling loads of arbitrarily restrained thin and thick plates. This effect should be considered in the manufacturing process and in the mechanical analysis of these structures
A Constructive Methodology to Solving the Capacitated Newsvendor Problem: an Approximate Approach
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Sicurezza sul lavoro nella PA nell’emergenza da Covid-19
No full textIl contributo, redatto con A. Delogu, analizza l'evoluzione degli interventi normativi finalizzati al contrasto della pandemia da Covid-19 nelle pubbliche amministrazion
