Modeling Visibility in Hierarchical Systems

Author(s):  
Debmalya Biswas ◽  
K. Vidyasankar
Keyword(s):  
Author(s):  
Tarun Gangwar ◽  
Dominik Schillinger

AbstractWe present a concurrent material and structure optimization framework for multiphase hierarchical systems that relies on homogenization estimates based on continuum micromechanics to account for material behavior across many different length scales. We show that the analytical nature of these estimates enables material optimization via a series of inexpensive “discretization-free” constraint optimization problems whose computational cost is independent of the number of hierarchical scales involved. To illustrate the strength of this unique property, we define new benchmark tests with several material scales that for the first time become computationally feasible via our framework. We also outline its potential in engineering applications by reproducing self-optimizing mechanisms in the natural hierarchical system of bamboo culm tissue.


2020 ◽  
Vol 45 (4) ◽  
pp. 148-154
Author(s):  
Marilyn Clarke

Library work now has a role to play when it comes to decolonisation. This article outlines what Goldsmiths Library, University of London is doing, through the Liberate our Library initiative, to diversify and decolonise its collections and practices against the backdrop of worldwide movements for education and social justice led by both students and academics to challenge the dominance of the ‘Westernised university’.2Examples of how we are doing this work are explained using critical librarianship as our guide, whilst recognising that we are still developing expertise in this evolving field of practice. This decolonisation work also uses critical race theory (CRT) as a means to dismantle racial inequality and its impact on higher education.Here, I would like to acknowledge the excellent and inspirational content of ALJ, Critical Librarianship: Special Issue (v.44, no.2) and I see this article as an ongoing companion piece.Goldsmiths Library's liberation work endeavours to empower its users with critical thinking and study skills whilst conducting their research using hierarchical systems and resources which in themselves are in the process of being decolonised.Decolonising a library collection and a profession must of course always begin or at least happen in tandem with the self, through a process that Kenyan author Ngũgĩ wa Thiong'o describes as ‘decolonising the mind.’3


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