jhayward

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721.
by jhayward 7y ago
It happens all the time. Go talk to ops/sre types who run large fleets and ask them for their time stories, also ask them how much infrastructure and scaffolding they have to have in place to ensure that such things are as rare as pos
722.
by jhayward 7y ago
See my comment on the other reply. I'll add in; astronomers like to be able to find objects in the sky using calculations based on time. UTC (actually TT, which underlies UTC) is good for that. Spend a little time on the various wiki
723.
by jhayward 7y ago
We humans almost always want our concept of "what time is it" to correspond to the relative motion of the sun in the sky. We ask "what time is sunrise?", and "when will the days start getting longer?". We lik
724.
by jhayward 7y ago
One thing that this article evokes is the 'I'm wrong and my belief is deeply held' aspect which technology people occasionally fall in to. Looking at the comments, with incorrect beliefs expressed as dicta ranging from just
725.
by jhayward 7y ago
You can set unix time to any value, including the future or past. If timestamps are recorded during those time-traveling epochs you will indeed see time go backward. Anyone writing time-aware processing needs to take this in to account, o
726.
by jhayward 7y ago
> come to the conclusion that UTC is flawed The different time definitions exist to support different use cases. UTC isn't flawed, in fact the adjustments that keep it aligned to solar time are very helpful for its defined use case
727.
by jhayward 7y ago
Are you suggesting that these hypothetical software engineers would substitute their opinion for the expertise of domain expert engineers? Or would a software engineer doing flight control software have to first be certified as an aero eng
728.
by jhayward 7y ago
MCAS was designed by aeronautical engineers, not software engineers. The exact sensors, function, and responses were all specified by aero engineers. The software, as far as we know, was produced using acceptable software engineering proc
729.
by jhayward 7y ago
I've long advised my family and friends: "always take the 1st appointment or flight of the day. Never book the end of the day's schedule" for doctors visits and airline flights. Chaos, delay, and error compound themsel
730.
by jhayward 7y ago
What makes you say that? Take a look at the summary in another comment: https://news.ycombinator.com/item?id=19913933 That looks like progress to me. Why do you say "everyone else is just going to burn more coal?&quo
731.
by jhayward 7y ago
When you blow up a bunch of radioactive material in a large steam explosion you get widespread contamination from fallout and a massive cleanup necessary to recover the scattered material, as well as dealing with the melted core material.
732.
by jhayward 7y ago
So, they've successfully got rid of about 50% of nuclear and 20% of coal by adding a very small amount of gas generation. Presumably the rest is coming from renewables. Sounds like a pretty good progress report.
733.
by jhayward 7y ago
Why do you keep posting this lie? Chernobyl's unit 4 was destroyed by an explosion. Fukushima had multiple explosions that destroyed the upper levels of reactor buildings, and ruptured the containment of unit 2. During the three mile i
734.
by jhayward 7y ago
Anyone using Michael Shellenberger and his faux front for nuclear lobbying is as an authority is participating in a fraud designed to mislead and misinform. Please don't.
735.
by jhayward 7y ago
The concept of `baseload' is entirely a creation of the system of extremely large thermal plants that are essentially a path-dependent outcome of the electric grid's development. There is no intrinsic usefulness in the concept. I
736.
by jhayward 7y ago
A trillion dollar tax cut that raises the annual deficit to over a trillion dollars a year can certainly ignite some economic activity. So can lighting a bonfire using the household furniture and next year's crop of seed corn. This is
737.
by jhayward 7y ago
> A ticket, no matter how small, is punishment for a criminal offense No, very often citations are given citing part of the civil code, not the criminal code. Just because a court is involved doesn't mean it's a crime.
738.
by jhayward 7y ago
Schedule an appointment with a clinical psychologist who specializes in ADHD and ask to be evaluated. It may take some looking to find someone who is accepting adult patients.
739.
by jhayward 7y ago
Anyone who has maintained a database such as a customer database knows that it needs to be constantly tested and updated to track changes in e.g., telephone, email, billing, or delivery addresses. What's different about this proposal?
740.
by jhayward 7y ago
Have you ever flown in a 737? I'll bet you have. Are you aware that at one point in the deployment of the 737 they had a "runaway rudder" issue [1] that caused two crashes and one near crash, and hundreds died from it? The
741.
by jhayward 7y ago
> The engines are mounted incorrectly, so much so that Boeing believed pilots need the assistance of MCAS on take-off now. This overstates the issue. The engine mounting changes the flight characteristics enough that the MAX 8 needs to
742.
by jhayward 7y ago
> Those people are crazy, he said. It is human nature to want to associate with people who display attributes you wish to see in yourself, and to avoid the converse. The aphorism "you are the average of your 5 closest friends&quo
743.
by jhayward 7y ago
"exec() is the world's most efficient garbage collector." [1] This idea is both worthy, and old. [1] DJB, paraphrased, when responding to a criticism of the design of qmail, which rapidly forked very small processes which did
744.
by jhayward 7y ago
It seems to be: lots of #3; a fair amount of #1 (people shorting spare batteries carried in pockets, for example); and a not insignificant amount of #2 (protected vs unprotected cells is not something people should need to know).
745.
by jhayward 8y ago
This argument isn't even a little bit consistent with the facts. We don't "import poor foreigners who undercut American wages", we import products produced in countries where labor, along with human life, is valued at v
746.
by jhayward 8y ago
I suspect Apple will be happy to keep taking 80%-90% of the profit in the marketplace while only shipping 20% of units.
747.
by jhayward 8y ago
Too late to edit the above, but this reminded me of the infamous in-joke about category theory use in Haskell: "A monad is a monoid in the category of endofunctors. What's the problem?" [1] [1] https://james-iry.
748.
by jhayward 8y ago
"whataboutism" [1] is rarely a valid response to a criticism of something. [1] https://en.wikipedia.org/wiki/Whataboutism
749.
by jhayward 8y ago
We can't really think of the electrical grid as a continental-scale system because it is severely constrained by transmission resources. It as to be modeled as, at best, regional networks with weak interconnection between them. Even w
750.
by jhayward 8y ago
> what part of a load flow study is non-linear? Sorry to give you a wiki reference, but I had literally just read the power flow study page [1] earlier today: "The problem is non-linear because the power flow into load impedances

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