Colorimetric estimation of boric acid with pentamethylquercetin

A new method for the approximate colorimetric estimation of boric acid depending on the yellow colouration yielded by boric acid with pentamethyl-quercetin in presence of citric acid in anhydrous acetone medium has been described. The method is empirical in character and gives results with a maximum error of about 15% with quantities of boric acid ranging from 0·4 to 1·8 mg

Utilising a Virtual Learning Assistant as a Measurement and Intervention Tool for Self-Regulation in Learning

Online learning and massive open online courses are widely used in engineering and technology education. Engineering next-generation learning requires overcoming the potential constraints of online learning environments which necessitate higher levels of self-regulation than traditional classroom settings. This particular requirement demands that learners allocate their cognitive, metacognitive, affective and motivational resources to meet this need. Lack of self-regulation can affect learners' engagement with the course content, resulting in sub-optimal learning outcomes or failure to complete the course. This paper reports on the design of a virtual learning assistant and its implementation in online learning activities. This paper outlines the virtual assistant's use as a data collection tool and, further, proposes that the virtual learning assistant has the potential to be used as an assessment tool for self-regulatory skills, and as an intervention tool to support online learners' self-regulation in online learning