Michael Herf – Medium

Michael Herf

The puzzling, blurry iPhone 14 pro

Why close focus matters, and why it’s at odds with bigger sensors on the new phones

Sep 19

The puzzling, blurry iPhone 14 pro

Sep 19

Why early birds stay up late and night owls wake up early

Your circadian system wants to wake up at a certain solar time.

Mar 12, 2023

Mar 12, 2023

Stopping the Superspreader

The case now for air quality & taming the most risky spaces

Jul 22, 2022

Image copyright The Associated Press

Jul 22, 2022

CO₂ sensors are magic COVID finders

Recently, I wrote about practical ways to ventilate for COVID-19, and why this is important. The idea from medical facilities and building…

Dec 18, 2020

Dec 18, 2020

How to Ventilate for COVID-19

Since the pandemic started, making buildings safe means keeping the air free of viral particles. This article addresses how much…

Aug 4, 2020

Aug 4, 2020

Some notes on “far UV-C” light

Can we use a new kind of UV-C light in occupied spaces?

Jun 25, 2020

Jun 25, 2020

Position Letter to the California Senate: AB-7, permanent Daylight Saving Time

June 3, 2019

Jun 13, 2019

Jun 13, 2019

Why Standard Time is better

We have to stop changing the clocks twice a year, but it’s also important to pick the right schedule when we do it.

Mar 20, 2019

Why Standard Time is better

Mar 20, 2019

Circadian Reality

VR glasses are going to affect sleep like nothing we’ve ever seen

Oct 7, 2015

Circadian Reality

Oct 7, 2015

On Really Bright Screens

They’re good for more than the movies

Jan 14, 2014

Jan 14, 2014

Michael Herf

Michael Herf

co-founder of f.lux, finding the connections between circadian rhythms, sleep, healthy buildings, and light. (Previously made Picasa.)

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