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redis_mlc

1,807 karma · joined July 4, 2019

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redis_mlc··on Why the Covid Vaccines Aren’t Dangerous
> not particularly concerned about the risk of undiscovered long-term side effects

We don't know the long-term effects of corona or corona vaccines on the female reproductive system, especially eggs.

Considering that if eggs are attacked, that's the end of us, so we should learn more and fast.

redis_mlc··on San Francisco's Millennium Tower fix halted after further sinking observed
The 2 leading theories are:

1) it has a floating foundation (in sand, not to bedrock), unique for this size of building in SF.

I talked to an architect once, and he acted like this would be ok. Guess not.

2) workers on the nearby tunnel "dewatered" the soil near the building. Changing the moisture level changes the resistance of the sand to weight.

Note that in an earthquake zone, soil "liquefacts" and settles, forcing water up, so it's terrifying that a large building rests on that. The building could literally plunge into the ground, or fall over during a liquefaction event.

See the videos from Kobe - waterfalls appear on top of the ground in liquefaction areas.

redis_mlc··on We Hire Old People
They meant employer NDAs, etc.
redis_mlc··on Welcoming our first riders in San Francisco
> Waymo drove 29,944.69 miles between "disengagements" last year.

You know better. If most of those miles were in sunny Mountain View suburbs, they don't count.

redis_mlc··on I was there when the DC-8 went supersonic
I grudgingly give credit to the British for being very clever (magnetron, battle of the beams, etc.) during and after WW2.

Having said that, London had food rationing for 9 years after the war, and really didn't have the money or facilities that the Americans had. (A B-29 was used as the mothership for the X-1!)

The W article below mentions "After the rocket plane experienced compressibility problems during 1947, it was modified with a variable-incidence tailplane following technology transfer with the United Kingdom."

https://en.wikipedia.org/wiki/Bell_X-1

Additionally, around half the X-plane pilots died, so Britain avoided a lot of test pilot fatalities. The US poured unlimited funding and talent into the program, with everybody being stars/aces (Yeager, Hoover, etc.) Both were injured seriously and almost died in various X-plane tests.

One X-plane test pilot set a record, then just quit and started a gun range.

redis_mlc··on I was there when the DC-8 went supersonic
Your comment matches common anecdotes, but I can provide more detail (I study aerodynamics.)

The background is:

- Britain sent data on the Miles M.52 supersonic jet to the US, so at least some Americans knew about the flying tail before the X-1 (first supersonic flight in 1948), and the Germans did some work on flying tails

https://en.wikipedia.org/wiki/Miles_M.52

- most of the pre X-1 planes that crashed didn't reach Mach 1, but they did lose control. Those are called loss of control due to compressibility, not supersonic flights.

- as the article says, the DC-8 flew ok up to Mach 0.97 in previous flights, so they thought things were fine. Note that in every Mach 1.0 flight that I've read about, the airspeed indicator jumps from around Mach 0.96 to 1.0, perhaps meaning the indicator is not accurate around Mach 1.0.

redis_mlc··on The grandmaster diet: How to lose weight while barely moving (2019)
1) A lot of high-level chess players lift weights, so could be burning twice as many calories daily as an average person.

(Pro US bodybuilders average consuming over 10,000 calories per day, with the record being 20,000 per day. They all take insulin to burn it, which is the open secret inside that community.)

2) Most of the comments about CICO on the Sept. 2019 link miss the point. CICO works for young people with a normal metabolism. But a medical doctor and researcher on one of Joe Rogan's podcasts spent an hour explaining convincingly how that isn't true for others, mainly because fat cells are forever and interact with hormones. His advice on losing fat was, "Get lipo."

redis_mlc··on VisiCalc: Information from Its Creators, Dan Bricklin and Bob Frankston
Yes, I expected Japan to have its own.
redis_mlc··on VisiCalc: Information from Its Creators, Dan Bricklin and Bob Frankston
> Now I feel bad about that.

Sure, you should pay for software when required.

But don't feel too bad. Note that even Microsoft realized that individuals and developing nations using software for free were expanding the market for future sales.

(In interviews over the years, MS spokesmen never focus on users that can't afford business software.

They (the SBA) did a few raids in Indonesian mall stores, where individuals really can't afford licenses. The average monthly salary at the time was about $100/month, and even today it's still around $200/month pre-corona.) But the raids might have been from having close relationships with the DEA and other US agencies moreso than the reach of the SBA by itself.

Also, large US companies know that site licenses and corporate sales are the real cash cow, with accounting and tax rules encouraging self-compliance.

FYI: What's interesting is that when I worked in Japan around 2005, all of the common desktop software was either Microsoft or Adobe at a very large company, with the odd internal program. (For servers, they were just switching from FreeBSD to linux.)

redis_mlc··on Ask HN: Why do contractors exist if they charge the same as a FAANG FTE?
The reverse of your question is very interesting.

In 2000, W2 contract programming rates were about 2x employee salaries, $75/hr - $100/hr vs. $75k - $100k/year plus stock options.

In 2021, W2 contract programming rates are less than employee salaries, and often there are issues with Obamacare penalties, $75/hr - $100/hr vs. $150k - $250k/year plus stock options.

In 21 years, W2-style contract rates have not increased in Calif., while other states like Texas have caught up to Calif.

redis_mlc··on Supernova shoots a dying star made of metal out of Milky Way at 2M MPH
Some info on the word metal as used in astronomy:

https://briankoberlein.com/post/hydrogen-helium-metal/

The short answer is that the fraction of metal is so low, they don't care enough to call it something else.

redis_mlc··on Indian inventor dies in homemade helicopter accident
Most of the original airplane inventors died testing their inventions, and even more helicopter and submarine - and half of the X-plane pilots.

It sounds like he was using the "tie it to the ground with a rope" technique, which most of the pioneers used, so credit for that.

I'd probably go further than just a rope (a telescoping ground mounting with pipes), but note that ground resonance can still destroy a helicopter and kill you.

Building personal full-size airplane models is common across India and China, but this is the first time I heard of one with an engine and that was flyable. (In the US, most people can afford to be involved in aviation, but it's 10x outside the affordability of the average person in the developing world.)

Hanna Reitsch, the famous woman Nazi test pilot, actually became famous for demoing the first production helicopter, the Fa 61, daily at a "fair" inside a building (!), so some people are just really talented at flying.

Ironically, after being captured by the British, she was released because although she was a great test pilot at manipulating the controls, she knew nothing about aeronautical engineering beyond subjective descriptions like, "the controls were too heavy", etc.

https://en.wikipedia.org/wiki/Hanna_Reitsch

redis_mlc··on US Birth-to-Death Ratio Nearing One
Prior to 1960, famine and war did limit population for thousands of years.

Famine was an ever-present issue since virtually everybody on earth was a farmer, and one bad crop could be fatal to their family. That's still true today in much of Asia.

The data period you're referencing is skewed by the US policing the globe since 1945, preventing major wars.

Ironically, the country thought of as a new superpower, China, today imports about half of its food. So they face remarkable food insecurity in 2021, and rely on their top adversary for much of it.

redis_mlc··on Little kids burn so much energy, they’re like a different species, study finds
Thanks for posting that information.

Another thing to keep in mind with infants/very young children is that if they get diarrhea, they can lose 30% of their weight (mostly water) in 2-3 days and die without hospitalization. So that means waiting a reasonable time for improvement at home can actually kill them. (I don't know how that kind of illness affects their future development.)

redis_mlc··on Redwood World – Pictures and Locations of Redwoods in the British Isles
> forest myths of germany and Robin Hood

There are dense forests in that region, including some that are primeval.

I had the good fortune to grow up next to a national park, and can speak un-ironically about tree-hugging.

Battle of Hürtgen Forest

https://en.wikipedia.org/wiki/Battle_of_H%C3%BCrtgen_Forest

redis_mlc··on How Antitrust Enforcement Can Spur Innovation: Bell Labs and 1956 (2017) [pdf]
The US government has mostly retreated from corporate oversight.

1) Mergers are often denied in the US, but once a company is large enough, there's no breakup.

The Bell breakup didn't really help, as some of the Baby Bells later merged into AT&T, though alernate equipment mfgs. and long-distance providers emerged.

2) The US govt. is reluctant to assess serious penalities against large companies because of the layoffs at Arthur Andersen in 2002 due to the Enron scandal.

Also, the SEC will only initiate cases where the trial is affordable and predictable, partly because of the Countrywide scandal where the founder had comparable resources to the US govt., and ended up settling. The case went on from 2008 to 2016.

(The SEC has actually sent letters to large companies asking them to not pay legal fees for executives - pretty desperate.)

https://abcnews.go.com/Business/Decade/arthur-andersen-busin...

https://www.investopedia.com/terms/b/babybells.asp

3) As banks become bigger, they become "too big to fail." Wells Fargo should have been shutdown after admitting millions of counts of fraud against account holders in a systemic effort to increase fees to move their stock price.

redis_mlc··on The House That Vanished
This happens every day, all day in Detroit.

The police do occasional helicopter overflights, but there's an endless number of "brick thieves."

Items like aluminum doors go for $5 a piece at the local bar, and you can do "custom orders."

redis_mlc··on Israeli military search team helped recover majority of Surfside victims
1) IDF "kneecaps" reporters (shoots them in the knees) to get them out of their way. This has been reported for decades.

2) The SJWs, regardless of side, refuse to recognize there is a war. Protesting isn't going to solve anything since neither side has anywhere to go.

3) There was plenty of media coverage of Iran involvement recently. Again, if you're a SJW and don't know that, you're misguided.

https://www.aspistrategist.org.au/irans-role-in-the-latest-g...

https://thehill.com/opinion/international/555594-irans-desta...

redis_mlc··on Israeli military search team helped recover majority of Surfside victims
The parent is largely correct.

In addition, Iran is financing and using Gaza as a proxy war with Israel.

I wouldn't call the IDF "100% humane", as they deliberately shoot reporters, but they are fighting a defensive war to avoid being pushed into the sea - there is no peace treaty with their neighbors.

Arab countries have had decades to offer to resetttle Palestinians and Uighurs, but not a peep.

redis_mlc··on The Chernobyl Tragedy – From the Memoirs of Nikolai Ryzhkov
Chernobyl is one of the main reasons the USSR collapsed.

Communist parties, as always, cover up disasters to maintain "stability" (ie. credibility as the only governing party.)

The Chernobyl coverup became public, discrediting the party as incompetent at governing.

(At the moment the CCP is attempting to coverup a flood that entered a subway system and a major vehicle tunnel, possibly drowning 1,000 people. Witnesses are being warned to maintain the "local image.")

"Cars trapped in tunnel amid floods in China; Family washed away by mudslides | China in Focus"

https://www.youtube.com/watch?v=qjTMfgGlUcE

Let this be a lesson to US Marxists and their useful idiots.

redis_mlc··on Coronavirus: Was US money used to fund risky research in China?
The answer is clearly yes, as money was granted to WIV, which specializes in corona viruses.

The questions are:

- why was EcoHealth Alliance/Daszak used as a cutout between the NIH and Chinese govt? The US govt. sends money directly to the Chinese govt. for many programs.

- why didn't Fauci admit he granted money to WIV in 2020 when he did hundreds of interviews?

- did Fauci pay for GoF research in Wuhan because there was concern about it inside the US? or paid for what exactly?

- why is Fauci combative when the Senate attempts oversight?

redis_mlc··on Support for team members who are mistreated in their country
1) Canada is easy for immigrants with a degree and a job offer since it's a points-based system.

The historical reason is that Canada is underpopulated for its size. As far as STEM, a large percentage move to the US, so foreign STEM workers are needed.

In addition, Canada is doing a lot of PC/SJW activism today, so there's that too.

2) The easiest US work visa is the TN-1 for a Canadian citizen to work in the US. Note that it's a non-immigrant visa, so if you want to stay long-term in the US, you would need to do further immigration paperwork.

redis_mlc··on The little tech firm gunning for an airspeed record
"The Electric NXT or E-NXT is a single-seater aircraft developed by Electroflight and the aerospace giant Rolls-Royce"

Not so little.

redis_mlc··on The History of the Dot Com Era
SOMA in 2001 had tumbleweeds blowing down the street, and you could park on the sidewalk and there was nobody to notice.
redis_mlc··on BANCStar (2000)
Well, as a DBA, I periodically use a 3rd party tool to print out the schema. It's mainly for new hires to learn from.

But sometimes I'll flip through it and notice:

- mis-spelled table names, usually duplicate tables

- missing FKs

- missing unique keys, most commonly for early RoR apps

- developer-specific EAV tables with 1 row.

The benefit always outweighs the dead trees, but printing once a year is typical. Back in the day, more frequenctly on 25-line terminals where there was too much scrolling.

redis_mlc··on The U.S. set off a nuclear bomb in space in 1962
There's a documentary on Youtube that covers both countries.

IIRC, in Russia it affected wide-area pipelines and phone networks - systems nobody wanted to screw with.

Anyway, the tests scared both sides shitless and I think they stopped unilaterally. They expected a result of X, and instead got 100X or 1,000X.

The article didn't do justice to the severity of what happened.

redis_mlc··on The U.S. set off a nuclear bomb in space in 1962
> The U.S. set off a nuclear bomb in space in 1962

So did Russia.

Both countries stopped doing that because of the excessive damage to man-made systems in both space and on the ground.

redis_mlc··on The database ruins all good ideas
> Because "just rewrite your program in C to avoid GC pauses" is such a flawed argument

False. All popular databases are written in C, and continue because of the GC issue. I would not use a general-purpose database written in Java because of GC, for example. We'll see how well Go works in practise.

> sub second spikes in latency

Go is supposed to be sub-second GC pause latency, but understand that most SQL queries are sub-millisecond, so GC latency is still a significant issue compared to query times.

Go might be acceptable now for niche databases like column-store for certain use cases, though.

Also, see the excellent comment above about distributed systems and server cache issues. You can't do application performance analysis with GC literally everywhere.

The puerile knee-jerk hatred for C on HN has to stop - almost every software you use is written in C, from scripting languages to operating systems to web servers to databases.

Source: DBA who's worked with current databases, as well as a custom database written in Java with significant (ie. brutal) GC problems that required a total refactor (rewrite) to "work" at all.

redis_mlc··on Classified Challenger tank specs leaked online for videogame
Most smart missiles in the past 2 decades attack tanks by detonating on top. You don't really need classified tank data for this well-known vulnerability.

A-10 pilots fire into the ground obliquely to ricochet into the bottom of tanks.

Neither the top nor bottom have much armor in tanks.

In WW2, the most successful aerial tank attacks were to drop a 500 or 1,000 pound bomb on or next to a German tank, turning it over. (You can ignore any tank attack claim numbers that were not done by large bombs or specialized anti-tank planes - P-51's just couldn't "shoot up" German tanks.)

The BalticaBeer channel has remarkable videos of the Sidewinder and Wall-eye missiles (the Wall-eye II could destroy anything with its 2,000-pound shaped charge. Most of the Gulf War TV footage you've seen is from Wall-eyes, which used analog edge detection for precise targeting of buildings, bridges and vehicles, and could fly through a single pre-selected window - in a train even!)

Balticabeer Military Aeronautics Youtube Channel

https://www.youtube.com/channel/UCgUYW-I81BUzQFIe3UtAE-w

Source: I study war.

redis_mlc··on Postgres sequences can skip 32 unexpectedly
> Isn't creating a sequence a bad idea in general, anyway?

No:

- sequences are very common. I recommend using them on every table for mgmt. and internal efficiency reasons.

For example, with Innodb, if you don't have a numeric id as a PK, it will assign an invisible one for internal use anyway.

Most third-party tools won't allow you to manage tables without numeric PK's.

- in most large applications, most sequence ID's are only used internally

- for public display (your concern) uuids or random numbers are possible

Source: DBA.

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