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cjensen

6,062 karma · joined September 29, 2011

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cjensen··on Niantic undergoes layoffs, cancels four games
Your points about AR are worth emphasizing: Pokemon Go has AR... that most users turn off. With AR turned off, it's strictly a location-based game.
cjensen··on Teams is killing my Mac every day
Funny thing: I use Teams on an i9 MacBook Pro 16" and _HAD_ this problem.

The issue is that if an i9 overheats, the ONLY symptom is that the CPU slows down and you will never know this happened. No report about heat is generated.

For me, the issue happened with Teams plus an External Monitor. An External Monitor lights up the discrete GPU and then it didn't take much CPU usage to push the system into slowdown mode.

Fix was a Genius Bar appointment to have them open and vacuum dust from inside the 2 year-old MacBook Pro. It's back to being perfect.

cjensen··on Starlink Maritime
People do install normal starlink on boats [1]. The $10K/$5K price tag really has me scratching my head about what they are thinking. Does look like they plan to cover the entire ocean, so at least there is a specific benefit they can point to. They're definitely giving up a lot of everyday coastal business in hopes of making it up with a few whales.

[1] https://www.youtube.com/watch?v=GHHCK6aARn0

cjensen··on High-intensity exercise, some new news
Most exercise does not burn the number of calories people expect. For example, running a 5K doesn't quite burn the calories of a single Big Mac. If you think "I am exercising so I can eat a little bit more" it's very easy to eat more calories than burned.

Exercise because exercise is good for you. Try to eat fewer calories if overweight because that's good for you. It's best to treat these as separate problems: don't expect exercise to help you lose your weight.

cjensen··on Linear Address Spaces: Unsafe at any speed
Nader's book was also click bait. The Corvair was not any more dangerous in practice than any of its contemporaries.
cjensen··on Pigeon Towers: A Low-Tech Alternative to Synthetic Fertilizers (2016)
Profits? The Green Revolution[1] is credited with widespread reduction of poverty and hunger. The Haber Process provided the fertilizer which was one of the keys to the revolution.

[1] https://en.wikipedia.org/wiki/Green_Revolution

cjensen··on Study of falling sperm counts finds 'alarming' levels of chemicals in male urine
If you have a concern about this, talk to your doctor.

Also keep in mind "sex drive" (aka "libido") can be easily affected by worrying about it. Talk to a psych about it because generally speaking psych-caused libido issues are super-easy to treat.

Lastly, if you are taking medications check for whether decreased libido is on the list of known side effects. Check in with your doctor anytime you have a well-known side effect to see if you can ignore it or not.

cjensen··on US moves closer to recalling Tesla’s self-driving software
Ford, like GM, has a literal camera monitoring the driver's face so they can see if they are paying attention. Seeing what your face is doing is a much more reliable system of measuring attention than whether or not the driver is touching the steering wheel while reading their book.
cjensen··on Chinese students at Cornell “taunt” Uyghur classmate
Legally speaking, the University admin cannot do anything to Chinese students who boo and walk out, and also cannot do anything to white supremacists who boo and walk out.

In the US, Students have First Amendment rights to express themselves. The critical point here is that by walking out they did not prevent any speakers from exercising their own First Amendment rights.

It does not mean we have to respect them for that or be polite about it. That's our First Amendment right.

cjensen··on Video codecs and 4k
If your TV set can't talk to the internet, you can't be tracked. All you lose is the silly 'interactive' features that no one uses.
cjensen··on Starlink for RVs
RVs go to remote scenic areas that have notoriously bad cellular service.

Consider Yosemite. It's visited by plenty of tech people, but Highway 120 through the park has almost to cell coverage from Groveland to Lee Vining.

cjensen··on Safety and Performance – Threadsafe Datastructures in C++
One nitpick with this: when the author first uses a mutex to ensure safety, he says "the operations took over 50 times longer!"

Well sure. But "the operations" were single read and writes to a small array likely held in cache. For more complex data structs, it's easy to see that they would take ten times or more longer than reading from a fixed location -- leading to only a 5X slowdown. That might still be a lot, but I'm still going to nitpick the "50" comment :-)

cjensen··on Luna Cryptocurrency Collapse: How UST Broke
To clarify, the word "recession" has a strongly defined meaning. It does not mean "things are bad" although bad times are strongly associated with recessions. Things can seem bad even without a recession.

Historically speaking, each time we climb out of a recession over the last 50 years it's been a bit slower of a climb than the previous climb out. That is a worrisome trend in its own right. I believe that's the kind of bad you feel people are experiencing -- a barely perceptible improvement starting from a bad situation.

cjensen··on Luna Cryptocurrency Collapse: How UST Broke
The gold-backed currency did not, in fact, work okay in the US for a long time. Between 1836 and the Great Depression, the economy went 3 or more years between recessions only 4 times. By comparison, the last three gaps between recessions were 7, 10, and 6 years; and it's now been 13 years since the last one.

[1] https://en.wikipedia.org/wiki/List_of_recessions_in_the_Unit...

cjensen··on California targets loud exhaust with sound activated cameras
20 years ago California installed sound walls on all freeways through residential areas when studies found severe health effects. Not sure this is really "waking up to the problems"...
cjensen··on A first for Canada: New type of nuclear plant opening by 2028
It's a very old idea which is in use in many places [1] -- and not just for nuclear plants. Main constraint is that you really can't transport the waste heat very far.

[1] https://en.wikipedia.org/wiki/Cogeneration

cjensen··on Elon Musk makes $43B unsolicited bid to take Twitter private
Holding a volatile and risky asset implies that the holder thinks there is a significant win available to offset the costs of the risks. It's reasonable to assume that projected price is far above market.
cjensen··on Tailscale Authentication for Minecraft
With Vanilla Minecraft, you have have a port open to the entire planet and have to trust that the built-in security will work. The more ports you want to open to friends, the more services you are relying on to have working security.

With Tailscale, you just need to trust that Tailscale works, which seems like a much better bet given WireGuard's simple-and-auditable code plus the quality of Tailscale's dev team working on top of that.

cjensen··on Johnny Cash Has Been Everywhere (Man) (2012)
They put that one on Catalina Arizona. There's ambiguity, so the illustration has to pick one.
cjensen··on Why income share agreements did not work out
Economics has a lot to say about how bad an idea sharecropping is. (This is apart from the obvious racism/slavery aspect of sharecropping in the southern US).

When you take a percent of income, you necessarily demotivate the worker. It comes down to this: Once the bare necessities are paid for should I work an extra hour, or should I go home and spend some more time with the family? If the income for the extra hour is decreased, it necessarily decreases the worker's interest in working the extra hour. Or maybe they still work two extra hours, but not three.

To make this work out you either need to make the payback a simple loan (the traditional solution) or you need to put an achievable cap on payments. Either way the optimal societal goal is that if the worker works a bit harder they should earn 100% of the profit from the extra work.

Historically this worked out as the disaster that was sharecropping. The tenant earned 50% and provided labor, and the landowner (who also provided capital equipment) earned 50%. The natural outcome was that laborers rationally did not work as hard as they could have, and the landowner failed to properly invest in equipment since extra income from productivity gains was halved.

Percent of income may make investors salivate, but it's a self-defeating idea.

cjensen··on Nvidia Grace CPU
"Grace?"

After 13 microarchitectures given the last names of historical figures, it's really weird to use someone's first name. Interesting that Anandtech and Wikipedia are both calling it Hopper. What on Earth are the marketing bros thinking?

cjensen··on Asahi Linux alpha release
If a hacker has the skill to make an evil boot loader, I'm prepared to be impressed. In contrast, creating a shell script to do something evil is literally the definition of a script kiddie.

At the very least, instead of the one liner give me a two liner: one to download to a file, then a second line to execute it.

cjensen··on MaskerAid iOS App
It's something to talk about on a podcast, so it is not a waste of time. Also, for many of us programmers, we really need programming in our lives otherwise we get that itch.

Your comments have been terribly absolutist about your own opinions. Please accept that other people have different priorities than you. Accept that other people have different comfort levels regarding their children's privacy than you. There's nothing wrong with your priorities, but there's also nothing wrong with people whose priorities are different.

cjensen··on Apple M1 Ultra Meanings and Consequences
The two dies and interconnect are all part of the same silicon. In the chiplets used by AMD and many others, they use separate CPU dies with literal wires between them. This replaced the wires with hard silicon.

Disadvantage of this technique is yields will be worse because the individual component is bigger, and this is limited to combining exactly two chips because it's not a ring-bus design.

cjensen··on Statement from Roman Abramovich
At first it was "this will be put into a trust" as if that solves the problem of the club being owned by an oligarch. Now it's "it will be sold but not fast-tracked and the proceeds given to a foundation."

Why not just transfer it to a foundation along with the debts?

The weasel-wording and slow-rolling gives the appearance of an attempt to evade consequences.

cjensen··on The Rain System “contains wildfires within 10 minutes of ignition”
Satellites are already used to detect hotspots. The Alert camera network [1] catches a lot too. On days where fire would be dangerous, there are already planes ready to go to get the fire before it gets large.

At best, this would provide more coverage more quickly by forward deploying drones. But planes are fast enough and you only need to use a smaller plane on a small fire, and we have plenty of them. Sure seems like techies had a bright idea who either failed to do the research or failed to give up after doing the research because it makes such a great presentation for investor storytime.

[1] https://www.alertwildfire.org

cjensen··on Things you notice when you quit the news (2016)
Being informed does not take a lot of time. But there are many wrong ways of doing it like reading what comes up on your twitter timeline or visiting a clickbaity site like CNN or reading any algorithmically-created newsfeed.

Here's what I suggest: subscribe to The Washington Post. Once a day, scan through the homepage and read through any articles that catch your interest. When you hit the bottom of the home page, you are done. Depending on how much you are interested in, this could take five minutes or twenty. You will get a reasonable overview of the most important topics primarily focused on the US.

cjensen··on Lighthouse Map
Looks like this is a work in progress. All the nav markers on buoys seem to be in place for the SF Bay, but none on the coastline or in Oregon. But hey, looks like it's on GitHub for anyone to submit patches.
cjensen··on Tonga volcano eruption created ripples in Earth’s atmosphere
Wikipedia has the 'splainer for you[1]. There are good satellite examples online[2]

But basically it has to do with buoyancy. A cloud or other layering of the atmosphere has a stable place in the vertical column. If the atmosphere passes over a mountain range that displaces the column vertically, the column returns to its normal position. In returning, the atmosphere overcorrects repeatedly and "bounces" back into position much like a single jump onto a mattress.

[1] https://en.wikipedia.org/wiki/Gravity_wave

[2] https://twitter.com/ggweather/status/1427061411604099077

cjensen··on The QT Timebomb
Your comment contains a lot of info that is not the consensus view of economists and businessmen.

Yes, interest rates going up lowers the price of bonds because "interest rates up" is mathematically equivalent to "bonds are cheaper."

The notion that changes in interest rates, which generally correlate with inflation, would alter the price of stocks is not obvious to me. Not sure what mechanism you would propose that would cause that to happen.

The US Government has the right to print USD. The notion that they could someday be unable to pay USD-denominated debts is therefore obviously wrong. Also, it is very much in the interests of exporters like China that USD remain strong, and they will likely just add the newly-minted USD to their USD reserves.

When proposing financial disasters, you can take these same types of fears and make them more plausible. E.g. propose that the US Government will overspend, weaken the dollar, cause the dollar to lose status as a reserve currency, and force future US debt to be denominated in something other than USD. Or propose that a sudden increase in inflation might cause effective salaries to decline or be uncertain, leading to a decline in consumer confidence and a recession.

Inflation uncertainty worries me the most. But I don't think there are any nightmare scenarios coming soon.

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