scholarly journals Crafting Everyday Resistance through Lightweight Design

2020 ◽  
Author(s):  
Sarah E. Fox ◽  
Samantha Shorey ◽  
Franchesca Spektor ◽  
Daniela K. Rosner
Keyword(s):  
Lightweight Design ◽  
Everyday Resistance

Shifting Dynamics of Contention in the Digital Age

2020 ◽  
Author(s):  
Jun Liu
Keyword(s):  
Information And Communication Technologies ◽  
Mobile Communication ◽  
Communication Technologies ◽  
Digital Age ◽  
Chinese Society ◽  
Internet Users ◽  
Communicative Practice ◽  
Political Contention ◽  
Information And Communication ◽  
Everyday Resistance

Over the past decades, waves of political contention involving the use of information and communication technologies have swept across the globe. The phenomenon stimulates the scholarship on digital communication technologies and contentious collective action to thrive as an exciting, relevant, but highly fragmentary and contested field with disciplinary boundaries. To advance the interdisciplinary understanding, Shifting Dynamics of Contention in the Digital Age outlines a communication-centered framework that articulates the intricate relationship between technology, communication, and contention. It further prods us to engage more critically with existing theories from communication, sociology, and political science on digital technologies and political movements. Given the theoretical endeavor, Shifting Dynamics of Contention in the Digital Age systematically explores, for the first time, the influence of mobile technology on political contention in China, the country with the world’s largest number of mobile and Internet users. Using first-hand in-depth interview and fieldwork data, it tracks the strategic choice of mobile phones as repertoires of contention, illustrates the effective mobilization of mobile communication on the basis of its strong and reciprocal social ties, and identifies the communicative practice of forwarding officially alleged “rumors” as a form of everyday resistance. Through this ground-breaking study, Shifting Dynamics of Contention in the Digital Age presents a nuanced portrayal of an emerging dynamics of contention—both its strengths and limitations—through the embedding of mobile communication into Chinese society and politics.

scholarly journals Exit, Voice, Loyalty … or Deliberate Obstruction? Non-Collective Everyday Resistance under Oppression.

2021 ◽  
pp. 1-16
Author(s):  
Stephanie Dornschneider
Keyword(s):  
Palestinian Territories ◽  
Common Response ◽  
Low Visibility ◽  
Collective Resistance ◽  
Important Addition ◽  
Everyday Resistance ◽  
And Coping

In highly oppressive environments, collective resistance is very costly. Non-collective resistance constitutes a less risky alternative. Focusing on a particular oppressed setting, the Occupied Palestinian Territories, I identify everyday forms of non-collective resistance: signaling, persevering, eschewing, and coping. Characterized by low visibility and targeting political goals indirectly, these activities have not yet been recognized as forms of resistance. However, they constitute important resistance efforts that deliberately obstruct oppressive regimes. These efforts show that individuals who are not visibly resisting their rulers cannot be assumed to be loyal or to suffer from a barrier of fear, as often suggested by theories in politics. They also offer an important addition to theories that identify violence as a common response to oppression, suggesting that peaceful non-collective activities constitute an everyday alternative.

scholarly journals An efficient approach to reliability-based topology optimization for the structural lightweight design of planar continuum structures

2021 ◽  
Vol 37 ◽  
pp. 270-281
Author(s):  
Fangfang Yin ◽  
Kaifang Dang ◽  
Weimin Yang ◽  
Yumei Ding ◽  
Pengcheng Xie
Keyword(s):  
Topology Optimization ◽  
Lightweight Design ◽  
Integrated Design ◽  
Optimization Methods ◽  
Filter Function ◽  
Continuum Structures ◽  
Performance Indexes ◽  
Reliability Method ◽  
Economic Indexes ◽  
The Impact

Abstract In order to solve the application restrictions of deterministic-based topology optimization methods arising from the omission of uncertainty factors in practice, and to realize the calculation cost control of reliability-based topology optimization. In consideration of the current reliability-based topology optimization methods of continuum structures mainly based on performance indexes model with a power filter function. An efficient probabilistic reliability-based topology optimization model that regards mass and displacement as an objective function and constraint is established based on the first-order reliability method and a modified economic indexes model with a composite exponential filter function in this study. The topology optimization results obtained by different models are discussed in relation to optimal structure and convergence efficiency. Through numerical examples, it can be seen that the optimal layouts obtained by reliability-based models have an increased amount of material and more support structures, which reveals the necessity of considering uncertainty in lightweight design. In addition, the reliability-based modified model not only can obtain lighter optimal structures compared with traditional economic indexes models in most circumstances, but also has a significant advantage in convergence efficiency, with an average increase of 44.59% and 64.76% compared with the other two reliability-based models. Furthermore, the impact of the reliability index on the results is explored, which verifies the validity of the established model. This study provides a theoretical reference for lightweight or innovative feature-integrated design in engineering applications.

scholarly journals Model-based application of the methodical process for modular lightweight design of aircraft cabins

Procedia CIRP ◽  
2021 ◽  
Vol 100 ◽  
pp. 637-642
Author(s):  
Michael Hanna ◽  
Johann Schwenke ◽  
Lea-Nadine Schwede ◽  
Fabian Laukotka ◽  
Dieter Krause
Keyword(s):  
Lightweight Design ◽  
Aircraft Cabins ◽  
Model Based

scholarly journals The Interaction between the Sheet/Tool Surface Texture and the Friction/Galling Behaviour on Aluminium Deep Drawing Operations

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 979
Author(s):  
Alaitz Zabala ◽  
Lander Galdos ◽  
Chris Childs ◽  
Iñigo Llavori ◽  
Andrea Aginagalde ◽  
...  
Keyword(s):  
Lightweight Design ◽  
Severity Index ◽  
Tribological Behaviour ◽  
Die Surface ◽  
Tool Surface ◽  
Strip Drawing ◽  
Aluminium Sheets ◽  
Increased Susceptibility

The increasing demands for lightweight design in the transport industry have led to an extensive use of lightweight materials such as aluminium alloys. The forming of aluminium sheets however presents significant challenges due to the low formability and the increased susceptibility to galling. The use of tailored workpieces and controlled die roughness surfaces are common strategies to improve the tribological behaviour, whilst galling is still not well understood. This work is aimed at analysing the interplay between the sheet and tool surface roughness on the friction and galling performance. Different degrees of Electro Discharge Texturing (EDT) textures were generated in AA1050 material strips, and tooling presenting different polishing degrees were prepared. Strip drawing tests were carried out to model the tribological condition and results were corroborated through cup drawing tests. A new galling severity index (GSI) is presented for a quick and quantitative determination of both galling occurrence and severity. The present study underlines the key role of die topography and the potential of die surface functionalization for galling prevention.

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