Browsing by Subject "Expansion"
Now showing items 1-3 of 3
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Calculation of the hubble universe expansion constant by analyzing observational data: An exploratory teaching proposal based on STEM epistemology
(2020)Approaches to STEM epistemology are related to the so-called 'Integrated STEM Education Curriculum integration of STEM contents based in constructivism theories of learning as a context to implement the STEM epistemology. ... -
The effect of y by Yb substitution in BaCe0.5Zr0.3Y0.2O3-Δ on the target properties of proton-conducting electrolytes
(2015)The BaCe0.5Zr0.3Y0.2-xYbxO3-δ ceramic materials are prepared and characterized in the present work. The impact of the partial Y3+/Yb3+ substitution on i) crystal structure, ii) microstructure (relative density, grain size), ... -
Socio-semantic query expansion using Twitter hashtags
(2012)In this paper we introduce an algorithmic approach, capable of creating a semantic network with concatenated terms and phrases (hashtags) from collectively postings on the Twittersphere. This network could be exploited for ...