Abstract: This letter proposes a tunable reflectionless phase shifter with a broad phase shift range (PSR). It combines a modified all-pass phase-shifting unit that can realize tunable phase shift, ...

The Central Board of Secondary Education (CBSE) commenced the board exams 2026 on February 17, 2026 (Tuesday). According to the schedule, Class 12 board exams will be conducted from February 17 to ...

The US has announced the Gaza ceasefire is moving to phase two, where “demilitarisation, technocratic governance, and reconstruction” will be the focus. Hamas leaders and representatives of other ...

HICL Infrastructure PLC and Renewables Infrastructure Group, known as TRIG, agreed to merge in a deal that creates a company with net assets of over 5.3 billion pounds ($6.98 billion). The companies ...

This is an updated version of a story first published on May 5, 2024. For many high school students returning to class, it may seem like geometry and trigonometry were created by the Greeks as a form ...

Abstract: This article proposes a phase-shift controlled push-pull class-E inverter with diode balance for load impedance variations, along with its design method. The diode clamp absorbs the ...

Sine die is Latin for “without a day.” It is used to mean adjournment when no further proceedings of a meeting are scheduled. So when the 2025 Legislature adjourned sine die late Friday, that means it ...

Researchers have linked shift work to a variety of health and sleep issues. Experts have ideas on how to prevent them. By Eric Berger When Samantha Shaw took a new job as a research technician for a ...

In 2022, two high school students created a trigonometric proof of the Pythagorean Theorem—something that’s only ever been accomplished by a few professional mathematicians. Now, a new article not ...

In operational amplifier stability, one rule of thumb is to allow 45 degrees of phase margin. Other design guidelines state that 60 degrees is best; still others say that 30 degrees is sufficient.