David Andersen
@daveandersen.bsky.social
Computer Science Professor, CMU;
co-founder and CTO, Enriched Ag
Energy-efficient computing, a dash of security, and a pinch of databases.
Also on Mastodon (https://hachyderm.io/@dave_andersen )
signal: dga.48
he/him
co-founder and CTO, Enriched Ag
Energy-efficient computing, a dash of security, and a pinch of databases.
Also on Mastodon (https://hachyderm.io/@dave_andersen )
signal: dga.48
he/him
Please forgive my potty mouth, but "feels like 18f" can fuck right off until December.
Brr.
Brr.
November 11, 2025 at 3:14 PM
Please forgive my potty mouth, but "feels like 18f" can fuck right off until December.
Brr.
Brr.
Aw. First kinda sorta snow of the year in #pittsburgh.
November 10, 2025 at 12:21 PM
Aw. First kinda sorta snow of the year in #pittsburgh.
Some days, I decide what to cook. Other days, the garden decides what I shall cook. Today was one of those days. Happy fall!
(Thanks, garden, you did well this year, we'll miss you.)
(Thanks, garden, you did well this year, we'll miss you.)
November 9, 2025 at 10:39 PM
Some days, I decide what to cook. Other days, the garden decides what I shall cook. Today was one of those days. Happy fall!
(Thanks, garden, you did well this year, we'll miss you.)
(Thanks, garden, you did well this year, we'll miss you.)
Mmm. Just had the best arepas and tostones I've ever had (this isn't a high bar, though). Arepittas in downtown #pittsburgh. Little hole in the wall. Freaking tasty. And the kids menu is perfect.
November 9, 2025 at 4:08 AM
Mmm. Just had the best arepas and tostones I've ever had (this isn't a high bar, though). Arepittas in downtown #pittsburgh. Little hole in the wall. Freaking tasty. And the kids menu is perfect.
Advantage of being a kid in the 80s: Associating the theme song from Peter Gunn with the video game Spy Hunter, not the original TV series.
www.youtube.com/watch?v=tK-v...
www.youtube.com/watch?v=tK-v...
November 7, 2025 at 8:19 PM
Advantage of being a kid in the 80s: Associating the theme song from Peter Gunn with the video game Spy Hunter, not the original TV series.
www.youtube.com/watch?v=tK-v...
www.youtube.com/watch?v=tK-v...
yes, yes they are.
November 5, 2025 at 5:34 PM
yes, yes they are.
Voting accomplished.
(Friends in PA, please do vote today for retaining the supreme court judges. It's important.)
(Friends in PA, please do vote today for retaining the supreme court judges. It's important.)
November 4, 2025 at 2:12 PM
Voting accomplished.
(Friends in PA, please do vote today for retaining the supreme court judges. It's important.)
(Friends in PA, please do vote today for retaining the supreme court judges. It's important.)
Is it the government shutdown? Or a bug? The NRC's event report archive pages are broken today:
Today's copy of the 2024 archive on left, Archived copy of 2024 on right. Observe that it's skipping every other month now, whoops.
The data is still there, though:
1/3
Today's copy of the 2024 archive on left, Archived copy of 2024 on right. Observe that it's skipping every other month now, whoops.
The data is still there, though:
1/3
November 1, 2025 at 1:34 AM
Is it the government shutdown? Or a bug? The NRC's event report archive pages are broken today:
Today's copy of the 2024 archive on left, Archived copy of 2024 on right. Observe that it's skipping every other month now, whoops.
The data is still there, though:
1/3
Today's copy of the 2024 archive on left, Archived copy of 2024 on right. Observe that it's skipping every other month now, whoops.
The data is still there, though:
1/3
I'm not even anti-ads. I like Amazon's approach with Kindle: *at purchase time*, you can choose a model with ads at a discount, or a model without ads. It makes the bargain very transparent. I choose to pay more and not have ads. Others choose otherwise. And that's great - b/c it's transparent!
October 28, 2025 at 11:50 PM
I'm not even anti-ads. I like Amazon's approach with Kindle: *at purchase time*, you can choose a model with ads at a discount, or a model without ads. It makes the bargain very transparent. I choose to pay more and not have ads. Others choose otherwise. And that's great - b/c it's transparent!
Thank you! This was so much better than him sitting on the iPad all morning. 🤓
October 27, 2025 at 1:12 AM
Thank you! This was so much better than him sitting on the iPad all morning. 🤓
Two down, two to go. Second was just as easy as the first (which is good, this is the one that connects to the boiler and AC, the rest are just AC zones)
October 25, 2025 at 12:06 AM
Two down, two to go. Second was just as easy as the first (which is good, this is the one that connects to the boiler and AC, the rest are just AC zones)
Phase 2 of Nest eradication has arrived
October 24, 2025 at 9:51 PM
Phase 2 of Nest eradication has arrived
But behold, the first combination hot water kettle / office plant. This video is full of research innovation!
October 24, 2025 at 3:44 PM
But behold, the first combination hot water kettle / office plant. This video is full of research innovation!
This pasted-in character has some serious anger problems and has been hulk smashing the filing cabinet drawers in her office
October 24, 2025 at 3:42 PM
This pasted-in character has some serious anger problems and has been hulk smashing the filing cabinet drawers in her office
aggggh can't escape it. I'm doing the university's poorly-made (outsourced) research security training module and I cannot escape the TERRIFYING GENAI LAMP. What is that even?
Is it a lamp? Is it a liposuction device from 2065? Will it eat my children? Only the AI knows.
Is it a lamp? Is it a liposuction device from 2065? Will it eat my children? Only the AI knows.
October 24, 2025 at 3:40 PM
aggggh can't escape it. I'm doing the university's poorly-made (outsourced) research security training module and I cannot escape the TERRIFYING GENAI LAMP. What is that even?
Is it a lamp? Is it a liposuction device from 2065? Will it eat my children? Only the AI knows.
Is it a lamp? Is it a liposuction device from 2065? Will it eat my children? Only the AI knows.
food $200
data $150
property tax $1200
halloween candy $3600
utility $150
someone who is good at the economy please help me budget this. my family is dying
data $150
property tax $1200
halloween candy $3600
utility $150
someone who is good at the economy please help me budget this. my family is dying
October 23, 2025 at 5:33 PM
food $200
data $150
property tax $1200
halloween candy $3600
utility $150
someone who is good at the economy please help me budget this. my family is dying
data $150
property tax $1200
halloween candy $3600
utility $150
someone who is good at the economy please help me budget this. my family is dying
There should be a yearly one-day AWS scheduled outage day to smoke test for shit like "I bought a bed that depends 100% on us-east-1". (& all cloud providers with over $100m ARR).
"AWS outage day?"
"Yeah man, hoping my car starts driving again really soon here."
"Toilet. Won't. Flush."
"brutal."
"AWS outage day?"
"Yeah man, hoping my car starts driving again really soon here."
"Toilet. Won't. Flush."
"brutal."
October 22, 2025 at 3:59 PM
There should be a yearly one-day AWS scheduled outage day to smoke test for shit like "I bought a bed that depends 100% on us-east-1". (& all cloud providers with over $100m ARR).
"AWS outage day?"
"Yeah man, hoping my car starts driving again really soon here."
"Toilet. Won't. Flush."
"brutal."
"AWS outage day?"
"Yeah man, hoping my car starts driving again really soon here."
"Toilet. Won't. Flush."
"brutal."
Well, that saves me $200/year. Bye Felicia.
October 21, 2025 at 11:51 PM
Well, that saves me $200/year. Bye Felicia.
Going all in. Anyone want three used Nest thermostats? (I have 4 thermostats; 1 was an early generation that Google is breaking, the other 3 are working but I don't want a hybrid system and the price is right on these used ones.)
October 21, 2025 at 10:41 PM
Going all in. Anyone want three used Nest thermostats? (I have 4 thermostats; 1 was an early generation that Google is breaking, the other 3 are working but I don't want a hybrid system and the price is right on these used ones.)
So far so awesome. Integrated trivially into homeassistant, installation was a snap. Honeywell clearly learned from Nest in terms of making it easy to install and mount, but the local UI is so much better -- and it's not cloud connected. Awesome to see progress in an area that was so stagnant.
October 21, 2025 at 9:57 PM
So far so awesome. Integrated trivially into homeassistant, installation was a snap. Honeywell clearly learned from Nest in terms of making it easy to install and mount, but the local UI is so much better -- and it's not cloud connected. Awesome to see progress in an area that was so stagnant.
11 months: Not quite back to what I was deadlifting a few years ago but finally back up to 315 plus doing static bar holds at 355 and my arm isn't falling off. Progress! I still notice a little bicep weakness in some climbing moves but it's better by the month.
And hey it's an "I'm 50" PR. 🤓
And hey it's an "I'm 50" PR. 🤓
October 21, 2025 at 4:39 PM
11 months: Not quite back to what I was deadlifting a few years ago but finally back up to 315 plus doing static bar holds at 355 and my arm isn't falling off. Progress! I still notice a little bicep weakness in some climbing moves but it's better by the month.
And hey it's an "I'm 50" PR. 🤓
And hey it's an "I'm 50" PR. 🤓
Hello new not-cloud-connected thermostat. Welcome to replacing my nest that will become useless in six days. Not doing that again.
(This one is zwave; I'd prefer zigbee but this seems popular and well supported by home assistant).
Got used for $56, get a $50 rebate from electric company, not bad
(This one is zwave; I'd prefer zigbee but this seems popular and well supported by home assistant).
Got used for $56, get a $50 rebate from electric company, not bad
October 20, 2025 at 11:16 PM
Hello new not-cloud-connected thermostat. Welcome to replacing my nest that will become useless in six days. Not doing that again.
(This one is zwave; I'd prefer zigbee but this seems popular and well supported by home assistant).
Got used for $56, get a $50 rebate from electric company, not bad
(This one is zwave; I'd prefer zigbee but this seems popular and well supported by home assistant).
Got used for $56, get a $50 rebate from electric company, not bad
google "AI", rocking it again. I wanted a movie quote, I got ... well, whatever this is.
("do you want whale sperm with that?" is a quote from the movie pump up the volume, as EVERYONE KNOWS. There are dozens of us!)
("do you want whale sperm with that?" is a quote from the movie pump up the volume, as EVERYONE KNOWS. There are dozens of us!)
October 20, 2025 at 4:09 PM
google "AI", rocking it again. I wanted a movie quote, I got ... well, whatever this is.
("do you want whale sperm with that?" is a quote from the movie pump up the volume, as EVERYONE KNOWS. There are dozens of us!)
("do you want whale sperm with that?" is a quote from the movie pump up the volume, as EVERYONE KNOWS. There are dozens of us!)
I haven't yet had my first cup of coffee and 7-year-old is already accompanying weird Al's "party in the CIA" with the rubber chicken and I'm sure I deserve this for some childhood transgression of my own but oh god coffee at least please
October 19, 2025 at 12:35 PM
I haven't yet had my first cup of coffee and 7-year-old is already accompanying weird Al's "party in the CIA" with the rubber chicken and I'm sure I deserve this for some childhood transgression of my own but oh god coffee at least please
CO2 tank finally ran out in 1 year 3 weeks; didn't start totally full b/c got it used. Found a place in Pittsburgh that refills 5lb tank for $13 (sav-mor beer). Updated cost:
60L bottles: About $0.40 / liter
Tank, year 1: $30 tank + $35 hose: about $0.32 / liter
Tank, year 2: about $0.06 / liter.
60L bottles: About $0.40 / liter
Tank, year 1: $30 tank + $35 hose: about $0.32 / liter
Tank, year 2: about $0.06 / liter.
October 16, 2025 at 3:59 PM
CO2 tank finally ran out in 1 year 3 weeks; didn't start totally full b/c got it used. Found a place in Pittsburgh that refills 5lb tank for $13 (sav-mor beer). Updated cost:
60L bottles: About $0.40 / liter
Tank, year 1: $30 tank + $35 hose: about $0.32 / liter
Tank, year 2: about $0.06 / liter.
60L bottles: About $0.40 / liter
Tank, year 1: $30 tank + $35 hose: about $0.32 / liter
Tank, year 2: about $0.06 / liter.