I make f.lux, models, and data to understand circadian and sleep behavior. Previously: Picasa co-Founder/CTO, Google, MetaCreations, CMU.
California, USA
Joined July 2006
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Michael Herf retweeted
Want to reduce C0VID transmission in #schools this fall?
Based on the new #ASHRAE Standards, this is the chart I'm recommending families and collective bargaining units use to lock in clean air.
1/15
ALT Simplified Recommendations for Classroom Air Cleaning to Reduce the Risk of Far-Field Airborne Infectious Disease Transmission, Derived from ASHRAE Standards 241 & 62.1 TABLE. Educational Facility Type, followed by cfm/person, then ACH Libraries 40 2.7 Art classroom 40 5.3 Wood and metal shop 40 5.3 Computer lab 40 6.7 Media center 40 6.7 Science labs 40 6.7 University and college labs 40 6.7 Daycare, ages 4 and under 40 6.7 Classroom, ages 5-8 40 6.7 Classroom, ages 9+ 40 9.3 Music, theater, and dance 40 9.3 Lecture classroom 40 17.3 Multiuse assembly 40 26.7 Lecture hall, fixed seats 50 50.0 Note. cfm/person based on ASHRAE Standard 241. ACH derived from typical full-capacity person density estimates from ASHRAE Standard 62.1. Use the most comparable educational facility. If half or one-quarter capacity, prorate the ACH estimate accordingly. Calculations focus on reducing risk primarily of far-field transmission in rooms with well-mixed air, and masks remain needed...
Michael Herf retweeted
No. Just no. We’re not going to call that sleep bulimia. We already call it “social jetlag,” “catch-up sleep,” “inconsistent sleep” etc etc. No need to grossly mislead about both how sleep and how eating disorders work at the same time.
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Michael Herf retweeted
“A century ago, a well-ventilated building was considered good medicine. But by the time Covid-19 arrived, our buildings could barely breathe. How did that happen?”
EXCELLENT article by @EmilyAnthes on where we went wrong. nytimes.com/2023/06/17/healt…
Michael Herf retweeted
Why #circadian & #sleep medicine matters, also for clinicians evaluating patients' CVD risk profile:
24-h & nighttime #bloodpressure were far more related to #cardiac 🫀 & all cause #mortality, compared with in-clinic blood pressure.
Recent prospective n=59,124 study @TheLancet
Michael Herf retweeted
Friends in the NE dealing with wildfire smoke, you can buy a ton of air filters (I generally recommend Coway/airmega or levoit) or you can create positive pressure in your house like this:
jhong.medium.com/think-posit…
Michael Herf retweeted
Why Permanent Daylight Saving Time is a Terrible Idea for Kids drcraigcanapari.com/why-perm…
Michael Herf retweeted
Education and tech leaders are launching "TeachAI," an initiative that will help integrate artificial intelligence into schools.
Code.org CEO Hadi Partovi explains what an AI-led school curriculum could look like trib.al/vqYHNtR
Michael Herf retweeted
Have you ever wondered how seals sleep at sea?
The last chapter of my dissertation, now published in Science, illustrates the intricate sleep-spiraling behavior of northern elephant seals.
science.org/doi/10.1126/scie…
Michael Herf retweeted
Had a really fun time talking with Tamara from
@arcascope about all things circadian, including babies wearing watches, hamster brain clocks, how light is like a drug, why drugs should be timed, and more!
We love chatting with fellow sleep experts. In our latest blog post, Dr. Gena Glickman (@GenaGlickman) takes a deep dive into #circadian rhythms and overall #sleep health. zurl.co/w1GI I
Michael Herf retweeted
💡☀️ How to report light interventions in a systematic way?
We are proud to present the consensus-based ENLIGHT Checklist and Guidelines.
New work with @LauraKervezee, @LokRenske, @elisemcglashan, @ray_najjar, and the ENLIGHT Consortium.
Preprint: biorxiv.org/content/10.1101/…
1/4
Michael Herf retweeted
Chronobiologists when a paper describes a “circadian rhythm” based on two time points taken under a light/dark cycle.
Michael Herf retweeted
.@sciam editorial Feb2023: “It’s time to stop thinking of school start times as immovable mountains...school district administrators should prioritize it, & people running for school boards need to add start times to their platforms.”
scientificamerican.com/artic…
Michael Herf retweeted
Repetitive patterns in large scale data does NOT imply there is a clock. Clocks are self-sustained, can be reset, and temperature compensated.
Michael Herf retweeted
I made an iOS “Shortcut” that I call “sleep” — it simultaneously: sets brightness to 0, volume to 0, reduces the white point, turns on low power mode, turns on dark mode if it wasn’t on already and turns on color filters (so phone is grayscale only)
Michael Herf retweeted
“History of Daylight Saving Time” is our newest video in The Science of Clock Change, now online! #EndDaylightSaving #SaveStandardTime #SleepHealth youtube.com/watch?v=Fnc1QQIL…
Michael Herf retweeted
It's the #wintersolstice, the shortest day and longest night of the year. Here's why sleep scientists say standard time will help you adjust. wapo.st/3G6Nfiv
Michael Herf retweeted
A quick reminder as folks are glorifying absurd hours again:
1. Sustained crunch mode leads to net negative productivity vs. 40 hr/wk
2. Working sleep deprived leaves you as mentally impaired as being drunk
Working longer *feels* productive but it makes you worse at your job.
Michael Herf retweeted
This animated story from @asteckelberg explains why experts in circadian clocks favor #permanentstandard time. While not always obvious, it is the best option for your #Health and #Wellbeing. @SRBR_Outreach @CCB_UCSD @sleepfoundation washingtonpost.com/wellness/…
Michael Herf retweeted
Freeways. Palm trees. Searing sunsets. That is how Los Angeles is depicted in pop culture.
But how might L.A. be imagined by artificial intelligence?
To avoid the tropes, we turned to literature, poetry and myth. latimes.com/projects/los-ang…
