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jpmattia

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jpmattia
·24 дня назад·discuss
45 years for me. I don't even think about keystrokes anymore.
jpmattia
·в прошлом месяце·discuss
> and they get to join the index next year without a rule change.

You seem to have ignored the 50% float rule. SpaceX is proposing to go public with about 5% of the float, but S&P requires 50%.

Do we think that the market will absorb the release of 45% of the shares? I'm dubious.
jpmattia
·в прошлом месяце·discuss
Manias, Panics, and Crashes by Charles Kindleberger is a more modern book, which I'd recommend as well.
jpmattia
·2 месяца назад·discuss
> Then I see he links to his own Revolutionary Theory, and it starts to look like outright crankary.

But what an AI-generated crankery! Because I enjoy wasting my time, I chose a random point (beginning of ch2) and started reading:

> Standard field-theoretic practice selects equations using symmetry, gauge invariance, and conservation. This chapter proposes a cognate selection principle built from three structural demands. A potential that carries energy must appear on the right-hand side of its own equation, because the energy it carries is part of what sources it. A potential that describes the same physics in every frame must have an equation that survives change of observer. A tensor equation must have matching ranks on both sides.

I've italicized a couple of items: Cognate selection principle? Really?

A tensor equation must have matching ranks on both sides? As opposed to all those tensor equations with differing ranks on both sides? Not exactly the type of thing that makes someone slap their head and shout "Why didn't I think of that?!"

The technobabble is interesting in that any single sentence might make sense in the absence of sentences nearby; It that regard, it's much like an Escher painting: Locally sensible, but globally out-to-lunch.
jpmattia
·3 месяца назад·discuss
In fact, you had to pay extra to have your number/address omitted from the phone book.
jpmattia
·5 месяцев назад·discuss
Great. Let us hope that support for hardware without TPM is next. Creating several mountains worth of electronic waste was a terrible decision. And in the middle of the AI-induced memory shortage!

Although I have to admit: The combination of AI and required new hardware has been a nice boost for switching to Linux.
jpmattia
·6 месяцев назад·discuss
I think the most intriguing part of this effort: Farmers traditionally employ machines to achieve their harvest. Unless I'm mistaken, this is the first time that machines are employing humans to achieve their harvest.

I mean, more or less, but you see what I'm getting at.
jpmattia
·6 месяцев назад·discuss
[I'm still thinking about this a day later!]

I think an additional table/graph of how large-bet performance vs small-bet performance would be interesting in general, as well as broken out by market type.

It kinda answers of the question: Are large bets equal to smart money? or are they equal in "smartness" to small bets?
jpmattia
·6 месяцев назад·discuss
> but i did find that politics was actually one of the most efficient categories (only ~1% maker/taker gap)

I confess I'm surprised by that result in particular. I realize your results are for Kalshi, but ISTR some reports from the presidential elections on Polymarket.

But more generally: When you say there is "only a ~1% maker/taker gap", is that weighted by the size of the bets? or is it averaged over the number of bets placed?

In any case: Thanks for a very interesting paper!
jpmattia
·6 месяцев назад·discuss
Something that appears to be missing: Certain events attract "advertising" types of bets. E.g. There is value in making a candidate appear to be a leader, so dedicating dollars to swinging the market is more of a form of advertising than an intelligent bet.

So it would be interesting to measure the inefficiencies of various bets vs the total market value in that bet.

e: Although full disclosure, I did not pick apart the entire paper. Maybe it's buried in there.
jpmattia
·6 месяцев назад·discuss
I would guess that someone is beaming a whole lot of wideband power at the satellites themselves, to overload the input receivers.
jpmattia
·7 месяцев назад·discuss
Maybe they could add a helpful paper clip to improve sales.

Edit: Or better still, convince all of their customers to throw away perfectly good hardware and upgrade to one with a single extra chip, creating a hazardous waste epidemic for landfills as a nice side effect. It's especially important to do this in the middle of a RAM and HDD shortage.

Really, I'll just never be half the great business strategist that these guys are. <sigh>
jpmattia
·7 месяцев назад·discuss
Hold a chain at its ends, and let it hang down naturally. What is that shape called? A catenary and its equation is y = a cosh(x/a).

Maybe you all knew that factoid already, but I learned the name of shape only recently.
jpmattia
·8 месяцев назад·discuss
> so IBM handled manufacturing of its first-generation CPUs.

I'm curious: Is there a consensus on which startup companies achieved success using IBM as a fab? or if not a consensus, I'd settle for anecdotes too.

My own company (which built 40G optical transponders) used them back in that era. While the tech was first rate, the pricing was something to behold.
jpmattia
·8 месяцев назад·discuss
> worry instead about stroke.

You say that as if stroke is orthogonal to heart disease. Much of what prevents one prevents the other.
jpmattia
·8 месяцев назад·discuss
> Although I’ve never had a boss that needed to find an error.

I think that is key. A great mentor early in my career pointed out to me: "A" rated people need to work for "A" rated bosses. It's possible to have a "B" or "C" person work for an "A" boss, but when you put "A" people under "B" or (god forbid) "C" bosses, all kinds of problems ensue.

[I've personally experienced that situation only once, and swore never again.]
jpmattia
·9 месяцев назад·discuss
How do you deal with the short lifespan until EOL? I've been using Rocky (and CentOS before that) simply to avoid dealing with EOL so often.
jpmattia
·10 месяцев назад·discuss
Like many of you, I serve as IT support for family. Some of those family are beginning to slip cognitively, so I'd like to say: Fk google for doing this. You are confusing my relatives who cannot tell the difference between your ad-spam and actual links, and it is not an exaggeration to say that you are now taking advantage of old people.

I'm trying to install adblockers (uBlock) and move them over to chatgpt when possible. If anyone has better ideas, I'm all ears.
jpmattia
·5 лет назад·discuss
> One of the interesting things I've noticed is that (around here at least) the over-the-air TV is much higher quality than the local providers (cable and fiber).

There's a substantial difference in bitrate between OTA broadcast (for the main channel) and the cable broadcast. Typical cable will stat-mux several channels down to well below 10 Mbps/channel. Main OTA tends to be around 15 Mbps (for a different encoding) but not stat-muxed. So to some extent, the quality of the channel you're watching on cable/fiber depends on what is going on in the adjacent channels.
jpmattia
·7 лет назад·discuss
> Here's one situation where it is very different.

Good god, no it is not different.

When the internet bubble collapsed in 2000, it literally bankrupted some people who had been compensated with stock options because of taxes. Exercising the options not only had resulted in greater income, but it caused AMT to kick in.

Moreover, some of the exercised options yielded stock that was still in lock-up due to IPO agreements. (People were anxious to start the long-term capital gains clock.) Shares plummeted even before they could be sold to pay off the taxes due.

The moral of the story is: Make sure to set aside money (liquid, USD) for taxes if you get hit with a sudden windfall. (edit addition, JumpCrisscross comment below has it right.)

Here's a couple of links to that history:

https://www.chicagotribune.com/sns-tech-taxes-story.html

https://www.mercurynews.com/2008/11/10/rescue-bill-offers-re...