An Activity-Generating Theory of Regulation

An M - theory solution generating technique

In this paper we generalize theO(p+1, p+1) solution generating technique (this is a method used to deform Dp-branes by turning on a NS-NS B-field) to M-theory, in order to be able to deform M5-brane supergravity solutions directly in eleven dimensions, by turning on a non zero three form A. We find that deforming the M5-brane, in some cases, corresponds to performing certain SL(2,R) transformat...

بررسی نگارش استدلالی دانشجویان efl از طریق نظریه اکتیویتی (activity theory)

چکیده ندارد.

An Activity Theory Analysis of ELT Reform in Iranian Public Schools

The present study takes Engeström human activity system model (1987, 1999) as a theoretical framework to investigate the CLT-based English curriculum reform in Iran which was initiated in 2013 by the Ministry of Education in public schools. With the premise that human activity is artifact-mediated and goal-directed, activity theory makes it possible to demonstrate the complex and dynamic relati...

An Economic Theory of Self - Regulation

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...