BC TECH
Saved by @SteveeRogerr

At the #AAS237 conference yesterday I went to a panel discussion on the effect of large constellations of satellites on astronomy from the ground. The thousands of satellites @spacex and others want to launch are a serious problem. 1/n

 @SpaceX The launch of so many satellites might change the appearance of the night sky for ever and the trails they leave in astronomers' cameras and the potential for interference with radio telescopes are serious problems 2/n
@SpaceX Those problems are particularly acute for those searching for near-Earth or threatening asteroids, for example, though any large survey of the sky is affected. 3/n
@SpaceX It was good to see @spacex, Amazon's Kuiper project and @oneweb present, and to hear that the latter have dropped their plans from more than 40,000 satellites to 'only' 6372. All the speakers were positive about working together. 4/n
@SpaceX @OneWeb And a lot has been done. All three companies talked about making sure their satellites were fainter than 7th magnitude soon after launch, which would make them invisible to the naked eye and avoid the worst problems for large surveys 5/n
@SpaceX @OneWeb .@spacex satellites launched since August have had sunshields to reduce their brightness, and they change orientation en route to their orbit, which is all good. It was encouraging to hear other companies talking about similar measures. 6/n
@SpaceX @OneWeb But. I remain very concerned. Firstly, we're essentially relying on good will - for these companies to spend their money reducing our problems. No regulation yet compels them to do so and any new operators could ignore astronomy. 7/n
@SpaceX @OneWeb On top of that, all three commercial speakers had latched on to 'mag 7' as a target. Yet, as Tony Tyson from @VRubinObs reminded us, at that brightness a satellite is 40 million times brighter than a typical galaxy in the survey 8/n
@SpaceX @OneWeb @VRubinObs Making up for the presence of thousands of satellites at that sort of brightness probably doesn't mean clever programming or statistical tricks, though they will help. It means running one's survey for longer to get the same scientific return. 9/n
@SpaceX @OneWeb @VRubinObs That means more money will be needed for operations, analysis - and for the staff to do these things. 10/n
@SpaceX @OneWeb @VRubinObs For big projects like @VRubinObs, that means an additional cost of millions of dollars. For smaller projects, which are cash strapped, it means finding funds to pay postdocs and students to keep the show on the road. 11/n
@SpaceX @OneWeb @VRubinObs As this is a cost on the research community caused by commercial entities I asked whether anyone had thought about mitigating it. There was - literally - silence from the commercial reps. 12/n
@SpaceX @OneWeb @VRubinObs It's great that they're taking actions to reduce the effect of their satellites. But if they want to be viewed as collaborators in our science, they should pay to fix the problems they're about to cause. 13/n
@SpaceX @OneWeb @VRubinObs What would be loose change for @spacex or @amazon would be make or break money for most astronomical projects. One of the speakers asked astronomers to do more research - well, research needs funding. 14/n
@SpaceX @OneWeb @VRubinObs @amazon And until someone addresses that, the general tone of the discussion, consisting of diplomatic gratitude and relief that large commercial companies are willing to engage with the problem at all, rather sticks in my craw. 15/15.

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Paul Stamatiou \U0001f4f7
Paul Stamatiou 📷...
@Stammy
Just published 15,000+ words on security keys. 🔐📱💻

With SIM attacks at their highest, now is a great time to take a closer look at your online security.

Removing SMS from your two-factor auth is a start, but authenticator apps have downsides too...

https://t.co/Dk0MPJHL2V


Just look at these headlines from recent SIM swap and port attacks.

It's all too established for attackers to find ways to socially engineer control of your phone number and start gaining control of your accounts.

I first talk about some general security tips.


Unfortunately not all websites let you remove your phone number from accounts.

You may consider migrating your phone carrier to @googlefi , which requires email account access to do anything (and can be locked down with security keys and even Advanced Protection)


Beyond SMS, I talk about issues that TOTP authenticator apps (the code generators) have as a form of two-factor auth. They're so, so much better than relying on SMS for your second factor but they still have issues like utilizing shared secrets and lacking phishing prevention.

Enter security keys!

Utilizing public key cryptography they don't have any shared secret between the client and the server. They prevent phishing by taking the website domain into account.

Even if you get tricked by a clone phishing website, your key won't.
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Shaun Russell
Shaun Russell
@_ShaunRussell
"I really want to break into Product Management"

make products.

"If only someone would tell me how I can get a startup to notice me."

Make Products.

"I guess it's impossible and I'll never break into the industry."

MAKE PRODUCTS.

Courtesy of @edbrisson's wonderful thread on breaking into comics – https://t.co/TgNblNSCBj – here is why the same applies to Product Management, too.


There is no better way of learning the craft of product, or proving your potential to employers, than just doing it.

You do not need anybody's permission. We don't have diplomas, nor doctorates. We can barely agree on a single standard of what a Product Manager is supposed to do.

But – there is at least one blindingly obvious industry consensus – a Product Manager makes Products.

And they don't need to be kept at the exact right temperature, given endless resource, or carefully protected in order to do this.

They find their own way.
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foone
foone
@Foone
I got a Toshiba T1200, which has a bad screen, and a dead CMOS battery, and I thought the hard drive was broken too...


but I rebooted it and heard a KTHUNK and a really loud spin-up noise and holy shit, the hard drive works!


and it still has files on it. the newest date is January 1994.


It's a 21mb hard drive, with ~37k of bad sectors.

This fucker is never going to spin up again, so I better go find some serial cables and copy shit off now.


The backlight is fucked so I'm shining a flashlight on it.
without it, it looks like this.
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Stian H\xe5klev \U000100cf intertwingling Roam graphs
Stian Håklev 𐃏 intertw...
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For people curious about the Roam API and confused by the syntax, or interested in why Conor went with Datomic/Datascript and not a traditional database, this older talk by Roam developer @mark_bastian is a great overview.

He gives great examples using Spiderman of how even modeling something fairly trivial in SQL is much more complex than in Datomic. But the real kicker is when you're trying to interrogate the data to find recursive relationships.


Right now the Roam data model (at least that's exposed to developers) is just about pages, blocks, and children with tags. Already you can see how finding the page containing a block with a certain tag etc is useful.https://t.co/jWJnuKu1RG


But imagine when attribute relationships are fully represented

You should be able to model the entire Spiderman story in Roam.
Page title: Peter Parker
Child of:: [[Richard Parker]] [[Mary Parker]]
Aliases:: [[Spidey]]

etc, and do these kind of queries.

"Show me quotes about operational efficiency in books by authors who used to be in the military"
"Show me companies in Boise, Idaho, founded by women, whose evaluation is lower than 10X ARR"
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Brad Kaellner - Stock Compounder
Brad Kaellner - Stock ...
@bkaellner
Incumbents almost always prevail with sustaining innovation

In disruptive circumstances, the entrants are likely to beat the incumbents

H/t Clayton Christensen, The Innovator’s Solution
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A thread of images from a Japanese illustrated history of America from 1861.

Here is George Washington (with bow and arrow) pictured alongside the Goddess of America. 1/


Here is Christopher Columbus (seated at center) reporting his discovery of America to Queen Isabella of Spain.

So far, kinda normal, but wait for it.... 2/


Now it's the American Revolution. Here is George Washington defending his wife "Carol" from a British official named "Asura" (same characters as the Buddhist deity). 3/


And here is Washington's "second-in-command" John Adams battling an enormous snake. 4/


Here is Washington and his wife "Carol" meeting an extremely youthful Benjamin Franklin, who has an impressive squat. 5/
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The Eye of Horus. 1/*


I believe that @ripple_crippler and @looP_rM311_7211 are the same person. I know, nobody believes that. 2/*

Today I want to prove that Mr Pool smile faces mean XRP and price increase. In Ripple_Crippler, previous to Mr Pool existence, smile faces were frequent. They were very similar to the ones Mr Pool posts. The eyes also were usually a couple of "x", in fact, XRP logo. 3/*


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Reshu Nath
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@ReshuNath
'Tera mera rishta kya, hindu, hindu,hindutva' is a clear take on 'tera mera rishta kya,la ilaha illallah'. As much as Hindutva hates the monotheistic religions especially Islam, there's a strange wistfulness and subliminal need at display now, to BE that they hate. 1


Charlie Hebdo doesn’t come up as a cautionary tale now but rather 'why cant we be like that'?
Growing up, Hanuman was an adorable deity for us, who swallowed the sun, or who couldn’t figure out what was Sanjeevani booti so he picked up a whole mountain and came back with it. 2

Or he was loyal, admirable and when he cleaved his chest, you saw both Ram and Sita. Now we have a lot of “Angry Hanuman” stickers. Why is a cute childlike God angry? We don’t know. It's a convenient blank space where to paint all the angst of Hindu Khatre mein hain narrative. 3


The other strange thing that has started happening is pictures of Ram appearing sans Sita. “Jai Siya Ram” has become “Jai Shri Ram”. Some people disingenuously explain it as being the same thing - because Shri is a name of Lakshmi. Not really. Siya is an apbhransh of Sita. 4


Shri is a prefix of respect in this case. Hinduism is being militarised. A woman/Sita has no place in it. Even the militaristic Goddess that is Durga has no place in this conception of neo-Hindu divinity, as evidenced by Dilip Mandal wondering where Durga came from. 5
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Hector Navarro
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@Hectorisfunny
I'm going to attempt to chronologically list all of the Marvel characters Stan Lee had a hand in creating. Working with his genius collaborators, Stan and his team produced an insane amount of iconic characters in a roughy ten year period. (Thread)


With his younger brother, writer Larry Lieber, and Jack "the King" Kirby:

Groot

Tales to Astonish #13 (November, 1960)


With writer Lieber, and artist Kirby:

Fin Fang Foom

Strange Tales #89 (October, 1961)


With the King, Stan gives birth to the Marvel Universe:

The Fantastic Four

Fantastic Four #1 (November, 1961)


With Jack Kirby:

Mister Fantastic

Fantastic Four #1 (November, 1961)
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Andrew Chen
Andrew Chen
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👇Thread.

Published a new essay: The red flags and magic numbers that investors look for in your startup’s metrics – 80 slide deck included!


This was a deck that I created on my (longish) interview process with @a16z. It was a long path, starting with meeting folks at the firm 10 years ago. But the purpose of the deck was to explain how I would use my superpower in an investing context

Here's what I explain in the deck. As investors (whether angel or VC) we're often confronted with an up-and-to-the-right graph. Is it going to go up? Or down?


One solution to forecast these growth curves is the Growth Accounting Framework, where you add up New+Reactivated and subtract churned users. In each time period that gives you the difference in monthly actives.


The problem with this is that it's a lagging metric, not a leading one. We need to go one level deeper and look at the underlying loops that drive these numbers, to understand the quality.
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