Three plus or minus five

Ex-professor, physicist, dad, gamer. I used to teach and do experimental particle physics; now I work on robotics software and deal with corporate culture shock. #exac #exacademic

Profile picture is an image of a data plot, with a single point and an error bar.

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Three plus or minus fiveThreeSigma@mastodon.online
2025-12-24

@Doctor_J_
And tomorrow. For reasons surpassing understanding we’re flying on Xmas and will rely on people who really shouldn’t have to work.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-23

@licho @beka_valentine

This is all backwards. It's a currency that allows black-market dealings without even the modest democratic protections in the existing financial systems.

"Proof of work" means running computers to solve pointless math puzzles, and rewards those that do more. That ALWAYS benefits those who are either in early (when the puzzles are easier) or those who can afford to buy more compute power.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-23

@adhdeanasl
Or as we're now going to call them: porange

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-23

@adhdeanasl aren’t they?

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-22

@beka_valentine
Well, when they manipulate democratic processes there isn’t much we can do but try to amass so much popular will they can’t deflect it. It’s not a qualitative problem but a quantitative one.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-22
Three plus or minus fiveThreeSigma@mastodon.online
2025-12-22

@chrisgeidner
Narrator: This of course did not happen.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-22

No man is island. But sometimes it feels like I’ve got a fuckton of ocean around.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-21

@Logic_And_Ethics
I love it when people who have not studied a subject in any depth at all weigh in as though their ideas are brilliant.

My dude, you simply have no idea what you're talking about. You need to talk to someone (a real actual person) and adjust your perceptions. Get some help.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-21

@petergleick That one he can have.

Three plus or minus five boosted:
myrmepropagandistfuturebird@sauropods.win
2025-12-21

Kwanzaa Facts

1. Kwanzaa is a made up holiday.
2. So is every other holiday.
3. Anyone can celebrate Kwanzaa.
4. It was created by Black, (mostly American and Christian*) people in the 1970s to celebrate Black history and the influence of African culture in the African diaspora and to assert the presence of Black people in US culture.
5. Most Black Americans don't celebrate Kwanzaa.
6. It is not a holiday tied to any particular religion.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-21

@futurebird

This exactly. What teachers need IMHO is more tools to help associate the student names to their faces to their thinking.

Three plus or minus five boosted:
myrmepropagandistfuturebird@sauropods.win
2025-12-21

A teacher needs to know their students to be effective. This puts an upper limit on the number of students one teacher can teach at once. Something like 150 students. I need to know their names, and when I see that name a little about who that is.

Further, a student should have at least 4 or 5 teachers who know them. This is a selection of hopefully trustworthy and supportive adults they can turn to.

Most plans to make school less expensive mess with these numbers.

Three plus or minus five boosted:
2025-12-21

For my friends out there on the job hunt.

post from r/funny

Caption: "I hate it when job interviewers ask "what is your greatest strength," so I printed up these business cards to just hand out when asked.

The image is of a small white card with "My ability to anticipate" printed on it.
Three plus or minus five boosted:
2025-12-21

Ouch! The most accurate standard of time in the USA has gone down!

Yup, a bunch of atomic clocks at the National Institute of Standards and Technology (NIST) in Boulder, Colorado may have lost power - and just to be safe, NIST has stopped broadcasting the time.

It's like someone took this "end times" business too literally.

Luckily NIST has other atomic clocks... and if those fail, there are plenty elsewhere, so we won't permanently lose track of time. But what about right now?

Anyone know the latest news? This report is from 5:18 pm December 19th, Pacific Standard Time:

lists.nanog.org/archives/list/

but if more news shows up, it may appear here:

groups.google.com/a/list.nist.

Dear colleagues,

In short, the atomic ensemble time scale at our Boulder campus has failed
due to a prolonged utility power outage. One impact is that the Boulder
Internet Time Services no longer have an accurate time reference. At time
of writing the Boulder servers are still available due a standby power
generator, but I will attempt to disable them to avoid disseminating
incorrect time.

The affected servers are:
time-a-b.nist.gov
time-b-b.nist.gov
time-c-b.nist.gov
time-d-b.nist.gov
time-e-b.nist.gov
ntp-b.nist.gov (authenticated NTP)

No time to repair estimate is available until we regain staff access and
power. Efforts are currently focused on obtaining an alternate source of
power so the hydrogen maser clocks survive beyond their battery backups.

More details follow.

Due to prolonged high wind gusts there have been a combination of utility
power line damage and preemptive utility shutdowns (in the interest of
wildfire prevention) in the Boulder, CO area. NIST's campus lost utility
power Wednesday (Dec. 17 2025) around 22:23 UTC. At time of writing utility
power is still off to the campus. Facility operators anticipated needing to
shutdown the heat-exchange infrastructure providing air cooling to many
parts of the building, including some internal networking closets. As a
result, many of these too were preemptively shutdown with the result that
our group lacks much of the monitoring and control capabilities we
ordinarily have.
Three plus or minus fiveThreeSigma@mastodon.online
2025-12-21

@grimalkina

Hey, I may name overweight, but that has nothing to do with me being hyper or being a bad programmer.

- bad early morning social media reading skills

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-21

@StillIRise1963
“Re-evaluate” is kind. I’m more in a mood to never again acknowledge them as people. And my wife is ready to start renting wood chippers.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-20

@TheBreadmonkey
It’s mostly tinsel, but they threw in some holly for flavor?

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-20

@StillIRise1963
Oh, I think a lot of people are doing just that. They’re ignoring math about jobs, epidemiology, temperature, and tariffs. It’s a whole plague of ignoring math.

Three plus or minus fiveThreeSigma@mastodon.online
2025-12-19

@blogdiva
Uh...
In American English, it is generally accepted that
million = 10^6
billion = 10^9
trillion = 10^12

I believe this is used everywhere, talking about rich people, budgets, or other numbers.

I dont' think the reason billionares are evil is because we have wrong order of magnitude on their name.

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