Child Language Brokering: cause ed effetti della mediazione linguistica e culturale svolta dai bambini immigrati

Il presente elaborato si pone l’obiettivo di mostrare e analizzare il fenomeno sempre più diffuso del Child Language Brokering (CLB). Si tratta di una scelta dettata non solo dall’attualità dell’argomento, tenuto conto dei grandi flussi migratori che hanno caratterizzato di recente lo scenario europeo, ma anche da motivi di carattere personale. Nelle pagine seguenti mi occuperò di descrivere la situazione all’interno della quale questo fenomeno si sviluppa, i motivi per i quali il bambino riveste il ruolo di language broker, in che misura questo lo condiziona a livello emotivo e come cambiano le sue relazioni all’interno della famiglia e con i propri pari. Successivamente analizzerò cosa significa realmente mediare e quali sono le strategie che questi piccoli mediatori adottano per svolgere questa attività. Nell’ultimo capitolo mi soffermerò sull’impatto che tale ruolo può avere sull’identità e sulle conseguenze che comporta il vivere tra due culture.

Root cause analysis applied to a finite element model's refinement of a negative stiffness structure

Negative Stiffness Structures are mechanical systems that require a decrease in the applied force to generate an increase in displacement. They are structures that possess special characteristics such as snap-through and bi-stability. All of these features make them particularly suitable for different applications, such as shock-absorption, vibration isolation and damping. From this point of view, they have risen awareness of their characteristics and, in order to match them to the application needed, a numerical simulation is of great interest. In this regard, this thesis is a continuation of previous studies in a circular negative stiffness structure and aims at refine the numerical model by presenting a new solution. To that end, an investigation procedure is needed. Amongst all of the methods available, root cause analysis was the chosen one to perform the investigation since it provides a clear view of the problem under analysis and a categorization of all the causes behind it. As a result of the cause-effect analysis, the main causes that have influence on the numerical results were obtained. Once all of the causes were listed, solutions to them were proposed and it led to a new numerical model. The numerical model proposed was of nonlinear type of analysis with hexagonal elements and a hyperelastic material model. The results were analyzed through force-displacement curves, allowing for the visualization of the structure’s energy recovery. When compared to the results obtained from the experimental part, it is evident that the trend is similar and the negative stiffness behaviour is present.