Null subtraction imaging (NSI) is a non-linear beamformer that aims to improve the spatial resolution of ultrasound images. NSI incoherently combines three delay-and-sum (DAS) outputs from the same RF ...

The purpose of this study was to measure and describe students’ learning development in mental computation of mixed addition and subtraction tasks up to 100. We used a learning progress monitoring ...

These observations convinced us that addition dominates a lot of behavior, but we needed experiments to reveal whether people were considering subtraction and rejecting it, or were not considering ...

In second grade, students focus on addition and subtraction skills and understanding place value. Getty Images Feb. 1, 2020, 3:43 AM EST / Updated Oct. 14, 2021, 9:42 AM EDT ...

Bee brains contain less than one million neurons. Despite this, new research shows the honeybee can use symbols to perform basic maths, including addition and subtraction.

The humble honeybee can use symbols to perform basic maths including addition and subtraction, shows new research published today in the journal Science Advances.. Despite having a brain containing ...

This letter proposes a method of substrate subtraction to improve the gain of an active-element pattern for individual elements in a small array. The proposed method is applied to a three-element ...