Persuasive Kinship: Human–Plant Relations in Southwest Amazonia

Based on my ethnographic research with the Jarawara people, an indigenous society in the Southwest Amazonia, the article explores the idea of thinking kinship as persuasion. Among the Jarawara, children can have more than one father, which is well known in Americanist literature, but there would exist as well an original practice what we could call multi-maternity . I also observe that the Jarawara can have diverse parental relations - some of their children are human, while others are plants. This occurs in a system of raising (nayana) in which children and plants are raised by a father and/or a mother who are not their biological parent - and sometimes do not even form a couple. This system takes place through a \u27seductive\u27 agency\u27 that both humans and non-humans can mobilise. In this article I will examine how Jarawara kinship, like other aspects of the Amerindians worlds, evoke a multiplicity that destabilises our concept of sexual reproduction and associated parenthood, and query our man/ woman dichotomy

Tradeoffs in manipulator structure and control. Part 1: Summary

The study of various aspects of manipulator design and control is summarized, focusing on the interaction of the structure's flexible dynamics and the dynamics of the joint control system, including specific information on modeling and design, modal analysis and control, and the flexible manipulator analysis computer program, FMAP

Integral Methodology for the Multiphysics Design of An Automotive Eddy Current Damper

The present work reports an integrated (experimental and numerical) methodology that combines the development of a finite element multiphysics model with an experimental strategy to optimally design an eddy current damper for automotive suspensions. The multiphysics model couples the whole set of time-dependent electromagnetic, thermal, mechanical, and fluid–wall interaction (CFD) partial differential equations. The developed FE model was validated against both literature model predictions and in-house experimental data. The electromagnetic model takes into account the magnetic material characteristics of the ferromagnetic material and iron poles. Loss sep-aration and the Jiles–Atherton hysteresis models were invoked to determine the heat generated in the soft iron parts. The computation of the fluid–wall interaction phenomena in the air gap allowed for the prediction of the temperature field across the solid materials, including the magnets. The design of the EC damper addresses the effects of the geometries of the stator and rotor, as they are the most critical geometries for maximizing the functions of an eddy current damper. The magneto-thermal simulations suggested that the heating of the permanent magnets remains within a safe region over the investigated operational frequency range of the eddy current damper

Mechanical Behaviour of TiAl Spherical Particles Including Friction Effect

Pubblicazione su CD-RO

As Sete Meninas: Reflexões Sobre Mulheres, Experiência E Efeitos Jarawara

Based on my ethnography with the Jarawara, an Arawá speaking people of the Middle Purus river, the article aims to think about the girls’ end of reclusion party, the mariná, and its effects on the composition of a “takeable” agent. The idea developed here is that the “somnolence” (nokobisa), the “tiredness” (mama) and the “beauty” (amosa) are forms of ritual actions that aim to draw out of the women’s bodies their capacities of “being takeable” (towakama), of “being carriable” (weyena). Those qualities would also be associated with the shamans, that after consuming rapé (a tobacco based powder) are carried on the back of their plant-children and experience relations with a variety of beings in the neme (the “upper layer”)-beings which they meet in their dreams as well. I will try to think how a certain notion of jarawara women agency may be linked to the oneiric activity and to the shaman’s knowledge. © 2017, Universidade Estadual de Campinas UNICAMP. All rights reserved.20174

Mechanical Behaviour of TiAl Spherical Particles Including Friction Effect

Pubblicazione su CD-RO

Nano-indentation properties of tungsten carbide-cobalt composites as a function of tungsten carbide crystal orientation

Tungsten carbide-cobalt (WC-Co) composites are a class of advanced materials that have unique properties, such as wear resistance, hardness, strength, fracture-toughness and both high temperature and chemical stability. It is well known that the local indentation properties (i.e., nano- and micro-hardness) of the single crystal WC particles dispersed in such composite materials are highly anisotropic. In this paper, the nanoindentation response of the WC grains of a compact, full-density, sintered WC-10Co composite material has been investigated as a function of the crystal orientation. Our nanoindentation survey has shown that the nanohardness was distributed according to a bimodal function. This function was post-processed using the unique features of the finite mixture modelling theory. The combination of electron backscattered difiraction (EBSD) and statistical analysis has made it possible to identify the orientation of the WC crystal and the distinct association of the inherent nanoindentation properties, even for a small set (67) of nanoindentations. The proposed approach has proved to be faster than the already existing ones and just as reliable, and it has confirmed the previous findings concerning the relationship between crystal orientation and indentation properties, but with a significant reduction of the experimental data