1,721,118 research outputs found
Il ruolo dello spazio linguistico globale tra italiano e dialetto: scenari migratori campani in Inghilterra
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Pulse-wave velocity and benign paroxysmal positional vertigo (BPPV)
No full textBackground: The aetiology of the BPPV is still uncertain. Some factors have been individualized that could explain partly the onset or the tendency to the recurrence, among which traumas, osteoporosis, viral infections and cardiovascular factors of risk. With particular reference to the influence that the cardiovascular factors of risk can practice on the genesis and persistence of the BPPV, it needs to keep in mind that, despite these introduces a role largely sustained in literature, it concerns considerations that hear again of very controversial interpretations however. Purpose: The objective of the study is to try to furnish a good definition of the existing relationship between the VPPB and the rigidity of the arterial tree, reliable expression of the conditions of the vascular circle and easily measurable with the appeal to recent technologies. Primary objective: the definition of possible differences of the profile of rigidity of the vascular system among subjects affections from BPPV and subjects without otologic diseases. Objective secondary: the definition of possible relationships between recidivist of BPPV and profile of vascular rigidity in a population of adults and elderly. Results: The results allow to affirm that an association exists among BPPV and increase of the arterial vascular rigidity, shown from the presence of more elevated values both of cfPWV (carotido-femoral Pulse Wave Velocity) that of differential arterial pressure or pulsatry pressure (PP) in the patients with BPPV in comparison to those measured in the healthy subjects of the same age. Moreover, an association exists between recurrence of the episodes of BPPV and increase of the arterial vascular rigidity in the patients of superior age to 60, shown by the presence of more elevated values of cfPWV in the patients with recurring BPPV in comparison to those measured in the subjects
A RARE CASE OF AVM-SCAR PREGNANCY TREATED WITH A COMBINED AND CONSERVATIVE APPROACH
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Shop floor digital twin in smart manufacturing: A systematic literature review
No full textThe digital twin is currently recognized as a key technology allowing the digital representation of a real-world system. In smart manufacturing, the digital twin enables the management and analysis of physical and digital processes, products, and people in order to foster the sustainability of their lifecycles. Although past research addressed this topic, fragmented studies, a lack of a holistic view, and a lack of in-depth knowledge about digital twin concepts and structures are still evident in the domain of the shop floor digital twin. Manufacturing companies need an integrated reference framework that fits the main components of both physical and digital space. On the basis of a systematic literature review, this research aims to investigate the characteristics of the digital twin for shop floor purposes in the context of smart manufacturing. The “hexadimensional shop floor digital twin” (HexaSFDT) is proposed as a comprehensive framework that integrates all the main components and describes their relationships. In this way, manufacturing organizations can rely on an inclusive framework for supporting their journey in understanding the shop floor digital twin from a methodological and technological viewpoint. Furthermore, the research strengthens the reference literature by collecting and integrating relevant contributions in a unique framework
Evaluating the Maturity of MBE Application
No full textNowadays the organizations want to be flexible and responsive to the market changes and to keep up with technologies, optimizing the time and cost of products life cycle. The product development process has become increasingly dynamic and complex, also requiring the collaboration among business partners. For this reason, companies need to create a robust interoperability between disciplines and departments. Traditional engineering practices, processes, tools and mindset should evolve to use a single definitive data source to ensure accuracy and consistency of data throughout the product lifecycle and to enable rapid and cost-effective distribution of product information from upstream to downstream. In this context, the Model Based Enterprise (MBE) represents a fully integrated and collaborative environment that embraces feedback from the various stages of the product lifecycle improving the model representation. The key component of this approach is the concept of Model-Based Definition (MBD). There are several barriers to the implementation and adoption of model-based approaches within the companies, although this does not limit its adoption at different levels. The concepts of Model Based Enterprise and Model Based Definition are analysed in order to clarify their relationship with the product lifecycle management and to identify existing maturity models. The objective of the paper is to evaluate the maturity of MBE applications. Following a theoretical approach, the Core-MBE framework is developed as an innovative tool for assessing the level of maturity of organizations in a model-based transformation process. Two manufacturing case studies (an aerospace company and a mechanical carpentry SME) were carried out to validate the proposed framework
Model‐Based Enterprise Approach in the Product Lifecycle Management: State‐of‐the‐Art and Future Research Directions
No full textInnovations in product development and process technologies represent a promising strategy to face the increasing competitiveness of modern markets in the global economy. Also, customer requirements become more and more specific and the complexity of products is still increasing. Industries need to adopt effective solutions during the product development process and to support, for sustainable purposes, all the phases of the product lifecycle. Advanced model‐based solutions emerge for digitally supporting these industrial needs. In this context, a Model‐Based Enterprise (MBE) represents an organization that adopts modeling technologies, such as Model‐Based Definition (MBD) solutions, to integrate and manage both technical and business processes related to product design, production, support, and retirement. Past research discusses the model‐based approaches focusing on technical product development, mainly referring to the design and the manufacturing phases. A wide perspective from the other phases of lifecycle seems to lack in the litera-ture. By carrying out a systematic literature review, this research aims to investigate the relationships between the MBE approaches and the product lifecycle phases and to identify potential benefits and challenges. It enhances the academic knowledge domain by also shedding light on potential future research directions
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