This paper provides concrete evidence that the expanding and accelerating Universe mathematically expressed by dark energy is ...

Developing mathematical thinking is one of major aims of mathematics education. In mathematics education research, there are a number of researches which describe what it is and how we can observe in ...

A knowledge of the field distribution associated with perfectly hard or soft waveguide modes, through a schematization of the reality, may help the design of corrugated horns or quasi-TEM waveguides, ...