Artificial biomineralisation of flax fibres in the presence of amino acids for use in natural fibre reinforced composites

Biomineralisation is gaining increasing interest as a potential technology for coating fibres for use in high-performance composites. The application of molecular biology and protein chemistry into material engineering creates an important interface between traditional methods in materials design and structural biology. In this thesis, three amino acids were taken into account (Glycine, Î2-alanine and L-lycine) to artificially biomineralise natural fibres for use in composites materialsope

Artificial Intelligence and Supply Chain Management: A literature review

openIl presente elaborato si propone di analizzare l’affascinante ed intricata intersezione dei due campi dell’intelligenza artificiale (IA) e della supply chain (SC), in modo da esplorarne il potenziale impatto e chiarire come le organizzazioni possono sfruttare queste tecnologie. Gli ultimi progressi e le recenti rivoluzioni hanno infatti reso evidente le capacità ed i potenziali benefici di tali strumenti, sottolineandone l’indispensabile integrazione all’interno delle aziende che vogliono aumentare l’efficienza operativa ed ottenere un vantaggio competitivo. Questo fenomeno è particolarmente enfatizzato dalla crescente complessità nel gestire catene di fornitura in un ambiente commerciale sempre più competitivo, come dimostrato anche dalla recente pandemia di Covid-19. L’IA e le altre tecnologie emergenti possono dunque creare una simbiosi ottimale per il contesto odierno, portando numerosi benefici sia in termini di costo, produttività ed efficienza. Nonostante il crescente interesse per l’argomento e la graduale implementazione di questi strumenti innovativi all’interno delle aziende, permane una carenza di ricerca fatta su questo fronte. Questo studio ha dunque l’obbiettivo di colmare alcune lacune esistenti nelle pubblicazioni disponibili ad oggi, esaminando 518 articoli di ricerca pubblicati tra il 1999 ed il 2023 dal database di Scopus. Il lavoro è strutturato come segue: Nel primo capitolo introduttivo vengono presentati i due concetti chiave dell’Intelligenza Artificiale e del Supply Chain Management. Nel secondo capitolo viene fornita una panoramica sull’importanza dell’intersezione di queste due aree e del come la letteratura corrente ha affrontato questo argomento. Il terzo capitolo è dedicato alla metodologia e spiega come è stato costruito il database di articoli e come è stato visualizzato ed analizzato tramite l’utilizzo del software VOSviewer e dell’analisi bibliometrica. Nel quarto capitolo vengono presentati i risultati della ricerca tramite l’analisi delle tre mappe create con l’apposito software. L’ultimo capitolo riporta le principali conclusioni derivabili da questo elaborato, rimarcando l’importanza dell’argomento trattato e sottolineando le limitazioni del presente studio, nonché le possibili direzioni per i ricercatori futuri.This thesis aims to analyse the fascinating and intricate intersection of the two fields of artificial intelligence (AI) and supply chain (SC), in order to explore their potential impact and clarify how organizations can leverage these technologies. Recent advancements and revolutions have indeed highlighted the capabilities and potential benefits of such tools, underscoring their essential integration within companies seeking to enhance operational efficiency and gain a competitive advantage. This phenomenon is particularly emphasized by the growing complexity of managing supply chains in an increasingly competitive business environment, as demonstrated by the recent Covid-19 pandemic. AI and other emerging technologies can thus create an optimal symbiosis for the nowadays context, yielding numerous benefits in terms of cost, productivity, and efficiency. Despite the growing interest in the topic and the gradual implementation of these innovative tools within companies, there remains a research gap in this area. Therefore, this study aims to fill some of the existing voids in the available literature, examining 518 research articles published between 1999 and 2023 from the Scopus database. The work is structured as follows: The first introductory chapter presents the two key concepts of Artificial Intelligence and Supply Chain Management. The second chapter provides an overview of the importance of these two areas and how the current literature has addressed this topic. The third chapter is dedicated to the methodology and explains how the database of articles was constructed and how it was visualized and analysed using the VOSviewer software and bibliometric analysis. The fourth chapter presents the research results through the analysis of the three maps created with the software. The final chapter outlines the main conclusions drawn from this paper, emphasizing the significance of the treated topic and highlighting the limitations of the present study, as well as suggesting potential directions for future researchers

Bananeira.

bitstream/item/61712/1/Belem-RecBas8.pdf

Coqueiro.

bitstream/item/66786/1/Belem-RecBas7.pd

Fruticultura tropical: a fruta-pão (Artocarpus altilis (PARK.) Fosberg.

bitstream/item/58183/1/DOCUMENTOS-41-CPATU.pd

Dark solitons in the unitary Bose gas

We study the dilute and ultracold unitary Bose gas, which is characterized by a universal equation of state due to the diverging s-wave scattering length, under a transverse harmonic confinement. From the hydrodynamic equations of superfluids we derive an effective one-dimensional nonpolynomial Schr\"odinger equation (1D NPSE) for the axial dynamics which, however, takes also into account the transverse dynamics. Finally, by solving the 1D NPSE we obtain meaningful analytical formulas for the dark (gray and black) solitons of the bosonic system.Comment: 13 pages, 4 figures, improved versio

Sub-session hijacking on the web: Root causes and prevention

Since cookies act as the only proof of a user identity, web sessions are particularly vulnerable to session hijacking attacks, where the browser run by a given user sends requests associated to the identity of another user. When n > 1 cookies are used to implement a session, there might actually be n sub-sessions running at the same website, where each cookie is used to retrieve part of the state information related to the session. Sub-session hijacking breaks the ideal view of the existence of a unique user session by selectively hijacking m sub-sessions, with m < n. This may reduce the security of the session to the security of its weakest sub-session. In this paper, we take a systematic look at the root causes of sub-session hijacking attacks and we introduce sub-session linking as a possible defense mechanism. Out of two flavors of sub-session linking desirable for security, which we call intra-scope and inter-scope sub-session linking respectively, only the former is relatively smooth to implement. Luckily, we also identify programming practices to void the need for inter-scope sub-session linking. We finally present Warden, a server-side proxy which automatically enforces intra-scope sub-session linking on incoming HTTP(S) requests, and we evaluate it in terms of protection, performances, backward compatibility and ease of deployment

Economic and Performance Analysis of Dual-Bay Vertical Lift Modules

Poster