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Abstract

Universal Grammar is a theory proposing that the ability to learn grammar is embedded in the neuronal circuitry of the human brain and language learning is facilitated by a predisposition that human brains have for certain structures of language. This theory shows that linguistic ability reveals itself without being taught and that there are properties that all natural human languages share. Universal Grammar suggests that every human brain has the innate property that causes it to posit a difference between nouns and verbs whenever presented with linguistic data.

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Authors and Affiliations

Claudio Salmeri
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Abstract

The aim of the investigation was liquid mixing time measurement in a laboratory scale stirred tank equipped with a metal Maxblend impeller and comparison with the corresponding mixing time obtained with other conventional impellers. The data are collected by Electrical Resistance Tomography, whose applicability in this case is non-trivial, because of the electrical interferences between the large paddles of the impeller and the measuring system. The raw data treatment methodology purposely developed for obtaining the homogenization dynamics curve is presented.Arobust approach for a fine and lowcost investigation of the mixing performances of close-clearance impellers in opaque systems is suggested. The analysis of the local and averaged conductivity time traces reveals the effect of important variables, such as the fluid viscosity and the vessel configuration, on the mixing time under various agitation conditions. The data collection and post processing procedures open the way to the application of the technique to multiphase and non-Newtonian fluids stirred with close-clearance impellers.
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Authors and Affiliations

Suzuka Iwasawa
1
Honami Kubo
1
Katsuhide Takenaka
1
Sandro Pintus
2
Francesco Maluta
3
Giuseppina Montante
3
Alessandro Paglianti
3

  1. Sumitomo Heavy Industries Process Equipment Co., Ltd. 1501, Imazaike, Saijo City, Ehime, Japan
  2. Retired from University of Pisa, Via Giunta Pisano 28, 56126 Pisa, Italy
  3. Department of Industrial Chemistry, University of Bologna, viale Risorgimento 4,40136 Bologna, Italy

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