SigmundA

43 ms·

541.
by SigmundA 4y ago
There are hydraulic trains, they have poor running efficiency worse then electric. My understanding is in order to get a large train moving with steel on steel requires very precise traction control that lends it self to electric, while doi
542.
by SigmundA 4y ago
Although less of an issue than I thought there are driving conditions where it cannot maintain speed due to lack of power, it was a big enough issue for class action lawsuit to be filed over it dropping to 45mph on the highway: https:&#x2F
543.
by SigmundA 4y ago
I guess I think the i3 doesn't count since its only a 34hp engine so it can't really power the car in normal driving (without sitting and letting the battery recharge for a while) its just a range extender but yes it is technicall
544.
by SigmundA 4y ago
Volts have a mechanical connection: https://www.gm-volt.com/threads/gen-2-volt-transmission-oper...
545.
by SigmundA 4y ago
>Regarding efficiency, I think this is a smaller issue than it seems. Let's say a chain is 95% efficient and their system is 85% efficient (they claim 5% less efficient than a chain, apparently, but I'm sure that's a stret
546.
by SigmundA 4y ago
Let's not forget about belt drives as well which are becoming more popular due to no need for maintenance while still having great efficiency.
547.
by SigmundA 4y ago
iPad has been my kids only device, media, games, school, etc. They are getting to the age where they want phones but we are holding off. Also they sometimes need to use laptop/desktop for school but that is rare now that most everythin
548.
by SigmundA 4y ago
>Robert “Razerguy” Krakoff, the co-founder and former president of gaming hardware company Razer, passed away last week at the age of 81. >In 1999, Krakoff was behind the first-ever gaming mouse: the Razer Boomslang. He was 58 when fo
549.
by SigmundA 5y ago
And that will burn your skin and give you cancer.
550.
by SigmundA 5y ago
Its was actually 91.2kw of power for 1.6kw on the other end, so actually only 1.8% efficiency. 60% is not measuring end to end efficiency and pretty misleading.
551.
by SigmundA 5y ago
42% is RF to DC conversion efficiency, absolutely no way those omni antennas are end to end dc-rf-dc 42% wireless transmission efficiency at any distance, its going to be many orders of magnitude worse.
552.
by SigmundA 5y ago
Prepared statements are only on a single connection (Session), its actually surprising that PG doesn't even cache prepared statements always! In MS SQL server plans are always cached unless told not to this is across connections, if it
553.
by SigmundA 5y ago
Other systems like SQL server solve this with hints (HOLDLOCK) which is also discussed here that PG really needs hints. So PG doesn't like hints and instead makes non standard syntax for upsert instead of standard merge syntax with a h
554.
by SigmundA 5y ago
Normally AUTO_UPDATE_STATISTICS will take care of recompiling plans if statistics changing significantly. I usually have the opposite problem with a good plan changing to a bad one due to statistics changing at some random time in productio
555.
by SigmundA 5y ago
If the planner is faster than a cache lookup it makes me wonder how sophisticated it is and how much optimization is left on the table. Most apps I deal with queries are very regular and the plan cache makes it act like a prepared statement
556.
by SigmundA 5y ago
It's uses the index either way, specifically it still index seeks but ends up doing the same thing as an index/table scan although slower. It normally makes a plan based on first execution and uses parameter sniffing, so it might
557.
by SigmundA 5y ago
Its was actually very surprising to me to find PG does not cache query plans but instead replans on every execution! I am used to db's like MSSQL server that cache and reuse plans making things like prepared statements redundant. My un
558.
by SigmundA 5y ago
Did you read the article I posted, its being added to PG 15: https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit...
559.
by SigmundA 5y ago
Of course they are now adding merge anyway: https://www.depesz.com/2022/03/31/waiting-for-postgresql-15-...
560.
by SigmundA 5y ago
Watching various Russian interview youtube channels reminds me of this [1]. Its very scary you basically have a lot of apathy and denial. People really just want to get on with their normal day and not think about it, they believe only what
561.
by SigmundA 5y ago
They also use lasers and just intense light and electricity. All of these have very high power levels which cause cell heating and destruction. The thing to keep in mind is the action is thermal and requires much more power than cell phones
562.
by SigmundA 5y ago
The key here is its "near ionizing" the mechanism is still based on photon energy for which RF does not have enough. Near ionizing and up have non thermal effects, RF's much lower photon energy's only known action is the
563.
by SigmundA 5y ago
So are there honing pigeons and honing missiles?
564.
by SigmundA 5y ago
>entirely reductive and provides no real value Calling alcohol "literal poison" is the same, that was the point. >because our body literally hates it we have to disguise it going in or else we involuntarily vomit immediately
565.
by SigmundA 5y ago
>At the onset of this condition, fluid outside the cells has an excessively low amount of solutes, such as sodium and other electrolytes, in comparison to fluid inside the cells, causing the fluid to move into the cells to balance its os
566.
by SigmundA 5y ago
We can survive without the being in the sun and the sun gives us cancer, do you want to live without the sun? Not everything we do should be judged on that basis, many things we do for enjoyment that are not required for living have risks a
567.
by SigmundA 5y ago
Salt is over twice as potent as alcohol, should salt be schedule 3? Salt is required for our body, yet is a deadly poison as well. Yes there is a big difference between water and alcohol and a big difference between alcohol and arsenic. Bl
568.
by SigmundA 5y ago
Then in that case water is literal poison as is just about everything else if too much is consumed: https://en.wikipedia.org/wiki/Water_intoxication Alcohol is more poisonous than water but less poisonous than arsenic,
569.
by SigmundA 5y ago
I have a Kensington SD5700T Thunderbolt 4 dock with my 2019 Intel MacBook Pro running two 4k monitors at 60hz and 1gb ethernet and various usb peripherals. All works pretty well now days but the ethernet had issues when I first got it, woul
570.
by SigmundA 5y ago
>We do study such effects. It's called a highly lucrative field of dermatology. Luckily, however, humans had billions of years to evolve alongside the sunlight, but phototherapy of all sorts is quite popular, and skin photo-damage i

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