1,721,236 research outputs found
DESIGN FOR ADDITIVE MANUFACTURING – MATERIAL CHARACTERIZATION AND GEOMETRICAL OPTIMIZATION
No full textAdditive manufacturing (AM) is a more and more appreciated manufacturing technology. This growing interest is related to the high flexibility of this approach and its capability to produce any geometry, opening new possibilities. An example is the improvement of the system performances exploiting lattice and reticular in substitution to the traditional solid design. Despite this premise, in real applications, part of the benefits is lost due to the inferior performances of the AM steels and the higher costs of additive manufacturing. In this scenario, the mechanical properties of a 17-4 PH SS produced via additive technology were characterized with experimental tests. The results were compared with data concerning the cast material. In this way, it was possible to execute a quantitative evaluation of the performance reduction. Three components, such as a hip prosthesis, a blow plastic bottle die, and an automotive gear, were chosen as representative examples. These three mechanical components are typically produced in quite different batch sizes. The hip prosthesis, the blow plastic bottle die, and the automotive gear were redesigned (design for AM) via a finite element (FE) approach. The new designs fulfill the original requirements in terms of strength showing however improved inertial properties. The original and new designs were exploited to quantify the benefits of introducing AM in different applications
From forest to finished products: The contribution of Industry 4.0 technologies to the wood sector
No full textThis study offers a Systematic Literature Review of the main applications of Industry 4.0 technologies in the wood sector, from forest management and raw materials production to the manufacturing of finished wood and paper products. The review, based on a rigorous and structured process, includes 106 papers published between January 2011 and December 2020. The analysis and categorization of the selected papers brings to the creation of a summary framework, which identifies (1) the needs of the wood sector that can be addressed with Industry 4.0, (2) the actions to be implemented to satisfy each need and (3) the specific Industry 4.0 technologies to be adopted for the implementation of the identified actions. Overall, the analyses conducted show that Industry 4.0 is mainly applied in previous literature to collect, share and analyze different types of data through network and data processing technologies, thus supporting decision-making processes along the entire wood supply chain. The aforementioned summary framework, which provides a complete overview of the contribution of Industry 4.0 to the wood sector, is used for the development of promising future research opportunities, deriving mainly from the investigation of underexploited Industry 4.0 technologies (i.e., blockchain, augmented reality, autonomous and collaborative robots). The research provides contributions to both academics and practitioners interested in the application of the new technologies to the different wood supply chain processes
. Meccanismi di trasduzione del segnale indotti dall’acetilcolina in cellule miogeniche in coltura
No full textThe organizational side of a disruption mitigation process: exploring a case study during the COVID-19 pandemic
Full text linkThis paper deals with the mitigation process of the COVID-19 pandemic. Scholars propose and discuss several mitigation strategies to face the COVID-19 disruptions, mainly focusing on technology and supply chain redesign related aspects. Less attention has been paid to the organizational aspects of the mitigation process. We address this gap through an in-depth analysis of the reactive organizational practices implemented by an Italian company during the COVID-19 pandemic. We further compare these practices with those proposed in the disruption management literature to identify common traits and differences. The results show that the overall management of a pandemic’s mitigation process does not significantly differ from that of conventional disruptions, since both contexts require the same basic organizational practices. However, some peculiarities on how these practices should be implemented in a pandemic setting do emerge, such as the implementation of a cyclic rather than linear problem-solving process, the adoption of a learning-by-doing approach, the need of a risk-taker mindset and the importance of creativity and improvisation. Besides complementing the literature, these findings allow to provide indications to managers on how to organize and coordinate the activities during the mitigation process, as well as on what capabilities and competencies should be leveraged to face the pandemic’s disruptions
An ANN approach in predicting solar radio enhancements at 11 cm wavelength
No full textOral presentation at conferenc
Purification, specificity, and other properties of a ribonuclease from Octopus vulgaris.
No full textRegolazione dell’idrolisi di polifosfoinositidi da parte di una G proteina in cellule miogeniche in coltura
No full textDESIGN for ADDITIVE MANUFACTURING: IS IT AN EFFECTIVE ALTERNATIVE? PART 1 - MATERIAL CHARACTERIZATION and GEOMETRICAL OPTIMIZATION
No full textAdditive manufacturing (AM) is becoming a more and more widespread (and trendy) approach. Its flexibility and capability to manufacture any topology has opened new possibilities: AM could lead to significant performance improvements thanks to the exploitation of lattice or reticular structures as partial replacement of the traditional solid design. The potential of this technology knows no bounds. However, in the real world, the lower performances of the materials and the high manufacturing costs significantly restrict the fields of application for which the adoption of AM results effective. In this context, the mechanical static and fatigue properties of a 17-4 PH stainless steel produced via AM were experimentally measured and compared with those of the wrought material to quantify the performance reduction. Based on these data, three components, namely a hip prosthesis, a blow plastic bottle die, and an automotive gear were selected as representative examples to show the pros and contra of AM. The three components were chosen because they belong to three quite dissimilar fields and are produced in different batch sizes. The three original designs were specifically optimized for AM by means of finite element (FE) simulations. The new solutions fulfil the strength requirements of the original parts showing at the same time reduced weights and inertias. The traditional and new designs were compared in terms of production times and costs to quantify the real benefits of AM for different applications
DESIGN for ADDITIVE MANUFACTURING: IS IT AN EFFECTIVE ALTERNATIVE? PART 2 - COST EVALUATION
No full textAdditive Manufacturing (AM) is becoming a more and more widespread (and trendy) approach. Its flexibility and capability to manufacture any topology has opened new possibilities: AM could lead to significant performance improvements thanks to the exploitation of lattice or reticular structures as partial replacement of the traditional solid design. The potential of this technology knows no bounds. However, in the real world, the lower performances of the materials and the high manufacturing costs significantly restrict the fields of application for which the adoption of AM results effective. In this context, the mechanical static and fatigue properties of a 17-4 PH Stainless Steel produced via AM were experimentally measured and compared with those of the wrought material to quantify the performance reduction. Based on these data, three components, namely a hip prosthesis, a blow plastic bottle die, and an automotive gear were selected as representative examples to show the pros and contra of AM. The three components were chosen because they belong to three quite dissimilar fields and are produced in different batch sizes. The three original designs were specifically optimized for AM by means of Finite Element (FE) Simulations. The new solutions fulfil the strength requirements of the original parts showing at the same time reduced weights and inertias. The traditional and new designs were compared in terms of production times and costs to quantify the real benefits of AM for different applications
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