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

Multiphysics Design of an Automotive Regenerative Eddy Current Damper

This research presents a finite element multi-physics design methodology that can be used to develop and optimise the inherent functions and geometry of an innovative regenerative eddy current (REC) damper for the suspension of B class vehicles. This methodology was inspired by a previous work which has been applied successfully for the development of an eddy current (EC) damper used for the same type of applications. It is based on a multifield finite element coupled model that can be used to fulfil the electromagnetic, thermal, and fluid dynamic field properties and boundary conditions of a REC damper, as well as its non-linear material properties and boundary conditions, while also analysing its damping performance. The proposed REC damper features a variable fail-safe damping force, while electric power is advantageously regenerated at high suspension frequencies. Its damping performance has been benchmarked against that of a regular hydraulic shock absorber (selected as a reference) by analysing the dynamic behaviour of both systems using a quarter car suspension model. The results are expressed in terms of damping force, harvested power, thermal field, comfort and handling, with reference to ISO-class roads. The optimisation analysis of the REC damper has suggested useful guidelines for the harmonisation of damping and regenerative power performances during service operation at different piston speeds

Mechanical Behaviour of TiAl Spherical Particles Including Friction Effect

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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