Condensation of Water Vapour in Ambient Atmosphere Under Applied Pressure at Room Temperature A Demonstration Experiment

The article demonstrates the condensation of water vapour under pressure and at room temperature, using a disposable syringe and an ambient light source. The small amount of trapped water vapour inside a syringe along with the air is compressed manually to one-sixth of its original volume. The compressed water vapour inside the syringe can be easily seen in the form of a white condensate on the inner side of the transparent, circular wall of the syringe. The condensate cloud can be observed in the atmosphere by releasing it in the open air while holding the syringe in front of a light source over a dark background. This model can be used as an analogous experiment while explaining the concept of condensation of gases under pressure–from school to postgraduate students.     

Wavelet transforms: Application to data analysis - I

In this article, we elaborate upon the key ideas underlying the construction of various wavelet basis sets. The roles of translation and scaling, which enable the wavelets to localize variations at desired levels of resolution, are clearly brought out. After explaining the implementation of one dimensional wavelet transform, we illustrate their usefulness through the analysis of a data set.     

How are feelings of difficulty and familiarity linked to learning behaviors and gains in a complex science learning task?

European Journal of Psychology of Education - The feelings of difficulty and familiarity (FOD and FOF) are two types of metacognitive experiences. Both may influence student engagement and the...