There are two stages in equation solving. These are localization of solutions and their refinement. Many methods ignore problems concerning localization. Generality of methods…
Abstract
There are two stages in equation solving. These are localization of solutions and their refinement. Many methods ignore problems concerning localization. Generality of methods falls quickly with growth of system complexity. Then a random search guided by heuristics may be some cure to complex system solving. An algorithm is proposed here in the form of Turbo Pascal program. It is composed of three methods. The program user controls system solving in function of system complexity.
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Presents a new method for systems solving with a solution proposal and flowcharts to enable programs to be developed. Considers the computational complexity and the details of the…
Abstract
Presents a new method for systems solving with a solution proposal and flowcharts to enable programs to be developed. Considers the computational complexity and the details of the algorithms proposed together with the examples of systems solutions. Discusses statistical tests and a final validation of the proposed method.
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M. Jariyaboon, A.J. Davenport, R. Ambat, B.J. Connolly, S.W. Williams and D.A. Price
The purpose of this paper is to study how cryogenic CO2 cooling during the welding process affects corrosion behaviour of friction stir welding (FSW) AA7010‐T7651.
Abstract
Purpose
The purpose of this paper is to study how cryogenic CO2 cooling during the welding process affects corrosion behaviour of friction stir welding (FSW) AA7010‐T7651.
Design/methodology/approach
Friction stir welded AA7010‐T7651 was produced with a rotation speed of 288 rpm and a travel speed of 58 mm/min. The liquid CO2 was sprayed onto the weld centre line immediately after the toolpiece. The microstructures of welds in different regions were observed using Field Emission Gun Scanning Electron Microscope (FEG‐SEM). The effect on the corrosion susceptibility was investigated using a gel visualisation test and potentiodynamic polarisation measurements using a micro‐electrochemical technique.
Findings
The main corrosion region for both FSWs AA7010‐T7651 produced with and without cryogenic CO2 cooling is in the HAZ region, which exhibited intergranular attack. Cryogenic cooling does not show any influence on anodic reactivity of the weld region (both nugget and HAZ) compared to uncooled weld metal. However, the width of the reactive HAZ is reduced after cooling, as compared to the uncooled weld. The cooled welds show higher cathodic reactivity in the nugget region than does the nugget region of uncooled welds.
Originality/value
There has been no previous work to investigate the effect of cryogenic CO2 cooling on the corrosion behaviour of FSW AA7010‐T7651. The paper relates the microstructures of both uncooled and cooled welds to their anodic and cathodic reactivities using a micro‐electrochemical technique.
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Christiano França da Cunha, Maurilio Barbosa de Oliveira da Silva and Thelma Lucchese Cheung
Edible insects are increasingly recognized as great food resources of the future. Entomophagy, the practice of eating insects, has a predicted market by 2030 of nearly $8 billion…
Abstract
Purpose
Edible insects are increasingly recognized as great food resources of the future. Entomophagy, the practice of eating insects, has a predicted market by 2030 of nearly $8 billion. But this market could grow even more with the acceptance of insects as food by Western consumers, as an alternative to conventional protein sources. In this context, the authors aim to collect and analyze information about consumers' perception of insects as food in Brazil, through the word association task.
Design/methodology/approach
In total, 751 participants agreed to complete the word association task in relation to entomophagy through an online questionnaire. They had to write down the first five words or terms that came to their minds when they thought of eating insects.
Findings
Individual mentions were categorized according to their similarities and/or proximity. Based on this grouping the authors identified six dimensions, with emphasis on “hedonic attitudes and feelings”, “cultural aspects” and “exotic”. The study concludes that Brazilians see insect consumption as belonging to another culture, not Western.
Originality/value
Few studies have explored the association of words in relation to entomophagy, especially in Brazil. This article aims to fill this gap, using this methodology applied to the Brazilian public.