BC TECH
Saved by @CodyyyGardner

I recently bought one of these air quality monitors and got to take it out for some measurements!

I'll share some findings in this thread.

CCing @CO2Guerrillas here, in case they would like to share.

 A very quick intro:

This device measures:

-CO2 concentration
-relative humidity
-atmospheric pressure
-temperature

I spent ~$200 on Amazon. It pairs with your phone and you can watch data come in every minute or so.

https://t.co/aoXjyq8kdu
A lot of covid transmission is airborne. So, having clean air is a must for reducing transmission.

A great way to see how much clean air you are getting is to measure CO2 concentration.

Too high -> you could use more ventilation -> open some windows!
So, I walked around town and took some measurements.

Outdoor CO2 concentration should be about 400 ppm. I haven't calibrated my device yet, so I measured ~470. Close enough.

<800 is good for indoors. Something like 2000 is very bad.

https://t.co/oZAkVnr9ts
For a reference: inside my apartment I quickly get ~1000 ppm if I don't have windows open. Maybe ~1500 if things get bad.

If I crack some windows, even just barely, it gets down to ~600 ppm very quickly, and my heater can keep the apartment ~70 F no problem.
First stop: a small shop in Harvard Square. It is about 60 ft long, 20 ft wide, and usually has ~3 people in there.

CO2: 937 ppm.

Not great, not horrible. Surprisingly (to me), this place had the highest CO2 on my trip. It did have a purifier, which was nice.
Next stop: a very similar store, but it has less business and only ~1 person in there most of the time.

~700 ppm. Still good.
Plant shop around the corner, which was a bit larger in size, maybe 2-3x, but also maybe ~4 people in there on average.

650 ppm. Not bad!

Fun fact: this shop is 103 years old now.
Next stop was interesting: a paper store that was split into two completely separate rooms. Both the same size, and both had ~2 people in there. One had the AC blasting, the other had it off.

Basically the same results in both: 650-700 ppm
Next stop, a 2-floor CVS which is usually pretty busy. Picked a spot near the center of the store:

620 ppm. Still not bad!

The doors open often, and the AC was on.
Next stop was the Harvard bookstore.

560 ppm.

Very nice! Especially since my device reads ~470 outside.

Took this sample in the essential ideology section.
I was skeptical about the low values, so I went to another section (science books now).

520. Still good!

The whole store had their AC up very high. I could see many of the signs shaking due to airflow inside. I assume they were piping in outdoor air.
Overall, I was impressed with most places! I expected worse, but I also didn't go into any of the more dangerous areas, like restaurants (we still have indoor dining in Boston).
A side note: CO2 concentration is just a proxy for air quality. Not perfect, and many other things matter too.

Follow these people instead of me to get some real science:

@kprather88 @jljcolorado @ShellyMBoulder @CO2Guerrillas @jksmith34

More from Tech

s. e. smith
s. e. smith
@sesmith
Oh are we talking about Sheryl Sandberg again? Well, your reminder that disabled feminists, LGBQT feminists, and feminists of color criticised her ‘lean in’ deal from day one. Don’t let anyone retcon that out of existence.

Like, a pretty narrow slice of feminists actually endorse and support corporate feminism, they’re just white, nondisabled, straight, cis, and noisy so their voices have a bigger reach.

So if your impression is that ‘feminism’ gave her a ‘free pass’ maybe you should question your overall impression of feminism rather than continuing to centre a handful of people as ‘thought leaders’ or whatever.

Critics within feminism have been doing this work for a long time and have been getting shat on it for about as long and I'm tired of seeing them erased. But what do I know — I am, after all, not a feminist.

But I WILL say, from my not-a-feminist perspective, that people who aren’t feminists who are criticising feminism should maybe understand the movement more deeply beyond a handful of high profile celebrity feminists.
TECH , SOCIETY
Devdutta
Devdutta
@Devdutta96
Please please please take your cyber security seriously even if you don’t consider yourself a high risk person. Here are a few easy things to start with. 1/n

Switch from WhatsApp to Signal and enable disappearing messages. Most of us cannot stop using WhatsApp entirely but at least turn off back ups to Google Drive or iCloud. 2/n

Do not have private conversations using the messaging service on any social media platform like Facebook, Instagram or Twitter. 3/n

Switch from Gmail to ProtonMail or any other secure email service provider. 4/n


Switch from Google Docs to CryptPad or RiseUp Pad.
CYBER SECURITY , IT PRIVACY , CYBER SECURITY STEPS
Advertisement
Tinker \u274e
Tinker ❎
@TinkerSec
Singing the Blues:
Taking Down an Insider Threat

"I had all of the advantages. I was already inside the network. No one suspected me. But they found my hack, kicked me off the network...

...and physically hunted me down."


Many pentests start from the outside, wanting to see how the perimeter might be breached.

This pentest started from the inside. My client wanted to assume they had already been breached, and, if breached, how far could an attacker go.

Could they stop me once I was inside?

So they snuck me in. Disguised me as a new employee. Gave me a work computer, an ID badge, an account in their system... hell, I even had a cubicle w/my assumed name on it.

The only person who knew who I really was was their CISO. Everyone else thought I was Jeremy in Marketing.

During most of the first morning, I completed onboarding, made introductions, and completed menial tasks.

But I had to act quick. I only had a week onsite. I had to hack their network while not raising suspicion.

So I set about it.

You have to understand... most "Internal Pentests" are straight forward. The hard part is breaching the network, but once you're inside, it's a target rich environment. End of Life computers, default passwords, everyone a Local Administrator...
TECH
Danny Weinbaum
Danny Weinbaum
@eastshade
A thread about Eastshade's bike mechanic!

When I originally thought of putting a bicycling in Eastshade, I was pretty sure it wasn't going to work, for the simple fact that if it was easy, we'd see a lot more rideable bikes in games. Well, I was wrong. It took a mere week.


Its essentially a first person controller with extra momentum, resulting in the the movement direction lagging behind your look direction. Then I used the angle between the look and the movement to dictate camera "bank" and handle bar rotation, and voila! Game changing feature!


The look of the bike was harder than the movement. Bicycles are fairly modern, so it was tricky to fit it to the setting. I took some artistic liberties and settled on a penny farthing (but wooden), ignoring how impossible that would be to ride on the rugged terrain in Eastshade.

Surprisingly, the hardest part was sound. It didn't feel like riding a bike until I found the right sounds and how to trigger them. For a while I was stuck thinking too realistically. A penny farthing is fixed gear, pedaling sounds nothing like a regular modern bike.

Finally I abandoned realism and went with sounds normal people would associate with biking. We're all so used to modern bikes that we strongly associate the distinct ticking of a freewheel mechanism (think of the sound when you stop pedaling and coast on a modern bike).
TECH
Darkroom
Darkroom
@usedarkroom
Following up last year’s surprisingly popular "10 things you likely didn’t know about Darkroom" and your many requests for more tips, we put together a second edition that focuses on workflows in Darkroom. Click through to read it all right here in this thread.

1/10 Copy & Paste your Edits in Batch. Skip the hassles of re-applying each edit over and over again by copying your edits from the tap-and-hold library menu, History tool, or the Actions (•••) menu. Go to your other photos, and paste your edits onto them.


2/10 The joy of seeing your wonderful shot in motion is why we love Live Photos so much, and why we fully support editing and exporting them! While editing, Tap the “LIVE” button at the left top when viewing a Live Photo for playback.


3/10 Turn your iPhone to landscape for an iPad like editing experience, bringing some iPad exclusive functionality to iPhone. In the library grid we show the Library Sidebar, when viewing or editing we show the Photo Strip, and in the color tool we show our Color Histogram.


4/10 Manage while editing with the Photostrip. With the photo strip available on all devices in landscape orientation, you can skip & hop through your library while editing, or quickly compare multiple photos to find the one with the perfect expression or the perfect light.
TECH

You May Also Like

Michael Dearing
Michael Dearing
@mcgd
An irony of facebook's situation.

Sheryl got her MBA at Harvard. One of the most famous cases (Extra Strength Tylenol) in one of the most famous classes (Business History) she took: in 1982, someone put cyanide in Extra Strength Tylenol capsules and killed 7 people in Chicago.

What do you do when someone turns your product into a weapon? When they use the system you built to harm? James Burke, CEO of J&J, was shockingly open with the public, he pulled the product and made significant packaging changes to make product safer (but not tamper-proof).

He over-shared every step along the way re investigation, redesign, stood up as both CEO and human. The reintroduction of new Extra Strength Tylenol succeeded. Burke saved the brand.

But four years later it happened again. A killer put cyanide in the capsules, this time a woman in Yonkers died. Same CEO, Burke, pulled the product again, completely changed the form factor from capsule to caplet and relaunched *again*. It worked *again*. How'd they do that?

Burke (CEO) tapped J&Js goodwill bank account w/ the public. Two big withdrawals from that bank account in four years + 8 dead bodies! But his honesty, openness, humanity (choked up about the deaths more than once), humility kept the goodwill bank balance positive the whole time.
TECH
Ryan Caldbeck
Ryan Caldbeck
@ryan_caldbeck
1/ I am seeing more and more founder secondary in venture rounds (Secondary = founders selling some of their shares before some other shareholders are able). Series B-D. I see both as an investor and through entrepreneur circles.

2/ I like secondary for entrepreneurs. Moderation is key but in a lot of situations I think it helps accelerate the co. Lots of very smart investors disagree. Here are my thoughts.

3/ Magnitude: My basic rule of thumb from what I see is market is 4+ yrs and up to 10% of founder’s equity stake with some $ cap that makes sense given stage etc. (typically <$10m)

4/ The entrepreneurial journey is brutally hard. Giving some financial relief helps remove one piece of pressure. I don’t think that secondary in the magnitude mentioned impacts the drive/persistence of great entrepreneurs.

5/ That secondary means they will be able to just sleep knowing they can pay their kids’ tuition. Secondary will make most founders better at their jobs, thus accelerating the co.
ALL
Advertisement
Professor
Professor
@DillikiBiili
So friends here is the thread on the recommended pathway for new entrants in the stock market.

Here I will share what I believe are essentials for anybody who is interested in stock markets and the resources to learn them, its from my experience and by no means exhaustive..

First the very basic : The Dow theory, Everybody must have basic understanding of it and must learn to observe High Highs, Higher Lows, Lower Highs and Lowers lows on charts and their

Even those who are more inclined towards fundamental side can also benefit from Dow theory, as it can hint start & end of Bull/Bear runs thereby indication entry and exits.


Next basic is Wyckoff's Theory. It tells how accumulation and distribution happens with regularity and how the market actually

Dow theory is old but
SCREENERS , ALL , MARKETESSENTIALS
Alex Oluwatobi
Alex Oluwatobi
@alexlobaloba
According to psychologists, there are four types of intelligence:

- Intelligence Quotient (IQ)
- Emotional Quotient (EQ)
- Social Quotient (SQ)
- Adversity Quotient (AQ)

1. IQ is the measure of one's ability to comprehend, solve maths; memorize things & recall subject matters.

2. EQ is the measure of your ability to maintain peace with others; keep to time; be responsible; be honest; respect boundaries; be humble, genuine, and considerate.

3. SQ is the measure of one's ability to build a network of friends & maintain it over a long period of time.

4. AQ is the measure of your ability to go through a rough patch in life and come out without losing your mind. It is a new paradigm and can be used to determine who will give up in face of troubles and may abandon their families.

Now to the very interesting & analytical part👇

People that have higher EQ & SQ tend to go further in life than those with high IQ but low EQ &SQ.

Most schools capitalize on improving IQ level while EQ & SQ are played down.

A man of high IQ can end up being employed by a man of high EQ & SQ even though he has an average IQ.

Your EQ represents your character; your SQ represents your charisma. Give in to habits that will improve these three Qs but more especially your EQ and SQ.

EQ and SQ make one manage better than the other.

Try not only to have a higher IQ but also to have higher EQ and SQ.
ALL
foone
foone
@Foone
So I was talking to @gewt about Job: A Comedy of Justice and I came up with a theory that I think explains why Heinlein's late-period work is so kinda-terrible and why I still enjoy it so much


So Heinlein had always been very interesting in the short parts of his novels, like the little snippets inside chapters. He had a very fun writing style, and wrote some fun dialogue with fun characters, right?>
It probably comes from how much of his early stuff was short fiction

And I think what happened with a lot of his longer works is that he'd just start writing fun bits and hope it would end up going somewhere or having a bigger plot by the end. like eventually he'd figure out where this was going, then go back and rewrite it into a cohesive whole

and I'm sure he had editors that'd help this process. No editor would let you publish something as rambly and changing-gears-every-other-chapter as The Number Of The Beast, for example... unless you were God-King Of Science Fiction 1980s Robert Heinlein.

so basically I think what happened is that by the 80s (when he was in his seventies!!) he lost the drive to go back and rewrite and he was too Untouchable for editors to make him.
CULTURE