Littérature scientifique sur le sujet « Karafilly »

Tooling cost is a major contributor to the total cost of small-lot production of sheet metal components. Within the framework of an academic/industrial/government partnership devoted to the development of a reconfigurable tool for stretch forming, we have implemented a Finite Element-based procedure to determine optimal die shape. In the reconfigurable forming tool (Hardt, D. E. et al., 1993, “A CAD Driven Flexible Forming System for Three-Dimensional Sheet Metal Parts,” Sheet Metal and Stamping Symp., Int. Congress and Exp., Detroit, MI, SAE Technical Paper Series 930282, pp. 69–76.), the die surface is created by the ends of an array of square pins, which can be individually repositioned by computer driven servo-mechanisms. An interpolating polymer layer is interposed between the part and the die surface to attain a smooth pressure distribution. The objective of the die design algorithm is to determine optimal positions for the pin array, which will result in the desired part shape. The proposed “spring-forward” method was originally developed for matched-die forming (Karafillis, A. P., and Boyce, M. C., 1992, “Tooling Design in Sheet Metal Forming using Springback Calculations,” Int. J. Mech. Sci., Vol. 34, pp. 113–131.; Karafillis, A. P., and Boyce, M. C., 1996, “Tooling And Binder Design for Sheet Metal Forming Processes Compensating Springback Error,” Int. J. Tools Manufac., Vol. 36, pp. 503–526.) and it is here extended and adapted to the reconfigurable tool geometry and stretch forming loading conditions. An essential prerequisite to the implementation of the die design procedure is the availability of an accurate FE model of the entire forming operation. The particular nature of the discrete die and issues related to the behavior of the interpolating layer introduce additional challenges. We have first simulated the process using a model that reproduces, as closely as possible, the actual geometry of the discrete tool. In order to optimize the delicate balance between model accuracy and computational requirements, we have then used the information gathered from the detailed analyses to develop an equivalent die model. An automated algorithm to construct the equivalent die model based on the discrete tool geometry (pin-positions) is integrated with the spring-forward method, to generate an iterative die design procedure that can be easily interfaced with the reconfiguring tool. The success of the proposed procedure in selecting an optimal die configuration is confirmed by comparison with experimental results.

2008-2009
Il lavoro approfondisce, attraverso le opere di F. Karafilly, Lisa Appianesi ed Anne Michaels, il rapporto tra nmemoria e identità, sia sul piano umano sia su quello artistico. Il primo capitolo si incentra sull'analisi dell'interrelazione tra storia, memoria e identità nell'opera 'Ashes and Miracles' della scrittrice Irena Friedman Katafilly. Vengono quindi discusse le ambiguità della memoria nel processo di decostruzione e di ricostruzione dell'identità dell'immigrato e anlizzato l'approccio e le considerazioni dell'autrice sul pregiudizio, la tolleranza e la riconciliazione nella società multietnica. Nel secondo capitolo l'analisi si focalizza sull'opera 'The Stranger in a Plumed Hat' esull'analisi dell'impatto della malattia cerebrale di Alzheimer, che aveva colpito la madre della scrittrice sulla memoria e la relativa percezione. Il terzo capitolo riprende l'analisi del rapporto tra memoria e identità sulla scia della guerra, attraverso l'esame dell'opera 'Losing the Dead' di Lisa Appignanesi, scrittrice canadese di origine polacco-ebrea. si esamina, quindi, il gioco delle identità coinvolte nella sopravvivenza della propria famiglia alle atrocità della guerra. La quarta parte del lavoro esamina le opere dell'Appignanesi che riflettoo sul legame tra l'identità, la memoria, la psicoanalisi e l'arte, considerando i vari approcci critici al mito femminile. L'ultimo capitolo analizza il romanzo 'Fugitive Pieces' dei Anne Michaels, in cui viene raccontata la tragedia della Shoa.
VIII n.s.

This chapter examines Ashes and Miracles: A Polish Journey, by Irena F. Karafilly. This book details the author's unexpected and deeply personal response to her visit to Poland. Her decision to write this particular book was not the result of previous planning; it was more like an impulse. The chapter shows how Karafilly's journey seems to have two ultimate goals. One is to capture the essence of Poland and its people, and the other is to uncover the nature of her own relationship with that country. While pursuing those aims, she experiences excitement and even delight, but also anxiety, unexpected sadness, and disappointment.