Diseases, Conditions, Syndromes

Insomnia expert offers useful tips for troubled sleeping in lockdown

The only thing worse than waking up to more bad news is not falling asleep at all. For those who are having difficulty sleeping while under lockdown for the COVID-19 pandemic, insomnia expert Dr. Les Gellis offers eight tips ...

Diseases, Conditions, Syndromes

Seven tips to get your sleep cycle back on track during lockdown

You might have noticed your normal sleep pattern has changed. Some of us may be sleeping more, and some of us may be sleeping less. Life has changed dramatically for many of us, with our usual daily routine—including commutes, ...

Diseases, Conditions, Syndromes

Q&A: Treating melasma

Dear Mayo Clinic: Years ago, I had some patches of melasma on my face removed with IPL treatment. When I went to make an appointment with my dermatologist recently for the same condition, I was told IPL should not be used ...

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Electronics

Electronics is a branch of science and technology that deals with the flow of electrons through nonmetallic conductors, mainly semiconductors such as silicon. It is distinct from electrical science and technology, which deal with the flow of electrons and other charge carriers through metal conductors such as copper. This distinction started around 1906 with the invention by Lee De Forest of the triode. Until 1950 this field was called "radio technology" because its principal application was the design and theory of radio transmitters, receivers and vacuum tubes.

The study of semiconductor devices and related technology is considered a branch of physics, whereas the design and construction of electronic circuits to solve practical problems come under electronics engineering. This article focuses on engineering aspects of electronics.

This text uses material from Wikipedia, licensed under CC BY-SA