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An Introduction to the Edumatrix Set and Its Didactic Capabilities
( Mikhail Semenov ),( Yong S. Colen ),( Jung Colen ),( Antony Pardala ) 한국수학교육학회 2020 수학교육연구 Vol.23 No.1
Learning through “recreational mathematics” has become a meaningful outlet to children of all ages. The Edumatrix set is a didactic tool for the development of logical and abstract reasoning among students. In this paper, we provide several illustrative exercises involving Edumatrix that teachers can utilize in their classrooms. We formulate students’ expected learning outcomes by aligning each exercise to the CCSSM content standards as well as examining which Standards for Mathematical Practices (SMP) our proposed exercises promote.
Resistors With Calculable Frequency Dependencies Up to 1 MHz
Kim, Han Jun,Lee, Rae Duk,Semenov, Yu. P. IEEE 2007 IEEE transactions on instrumentation and measureme Vol.56 No.2
<P>Resistance standards from 1 Omega to 100 kOmega, with calculable frequency dependencies of up to 1 MHz, have been developed for the calibration of commercial inductance-capacitance-resistance (LCR) meters and impedance analyzers. The resistors are designed on the basis of single bifilar loops. The typical resistance change from dc to 1 MHz is from 200 to 800 muOmega/Omega. According to the measurement results, the frequency dependencies of the resistors are several times lower than the measurement uncertainty of commercial LCR meters</P>