SigmundA

42 ms·

391.
by SigmundA 4y ago
So I see Ally may be at risk too, great I have savings there... Pretty scary to go from thinking you have a safe emergency fund regardless of the market to a potential bank run seemingly overnight. Wondering what tomorrow will look like and
392.
by SigmundA 4y ago
Not exactly true, you can burn natural gas very efficiently at a power plant and coal can be made relatively efficient compared to say gasoline. Power plants can have very extensive emissions controls maintained by dedicated staff as well.
393.
by SigmundA 4y ago
Yes natural gas has less Co2 emissions per BTU than oil and natural gas can be burned very efficiently in a power plant at nearly 60% vs say 40% for diesel or 30% for gasoline in an ICE.
394.
by SigmundA 4y ago
What was surprising to me when I looked into it is the power usage of EUV lithography. The machine takes about 1 megawatt of input for about 200 watts of euv light! Not the most efficient, I always knew it was complicated making modern chip
395.
by SigmundA 4y ago
So can I get Hacker News styled as a 80s dark fantasy yet?
396.
by SigmundA 4y ago
Yes so not only are you capturing heat from the environment you are turning electricity into heat in the compressor, both are delivered as heat to the interior. This is an advantage compared to cooling where you must reject both the interio
397.
by SigmundA 4y ago
Just to counter your edit: >But compressing and decompressing is not an energy efficient task. It takes a lot of work. Mechanical inefficiencies are a huge energy consumption. Gas is simply burning fuel. Yes, we should save gas for rainy
398.
by SigmundA 4y ago
https://en.wikipedia.org/wiki/Coefficient_of_performance
399.
by SigmundA 4y ago
Just do the math, all you need to know is furnace efficiency and COP of the heat pump along with the efficiency of your local power plant. I did that in my post, its not super complicated. Gas is burned creating a certain amount of heat, in
400.
by SigmundA 4y ago
They can be, natural gas is about 1000 BTU per cubic foot. An expensive high efficiency gas furnace might be 95% efficient (most normal furnaces are in the 80's) 1000 x 0.95 = 950 BTU/cuft A high efficiency natural gas power plant
401.
by SigmundA 4y ago
It was PDFium which is the open source version of Foxit. So yeah looks like they are just moving to closed source Adobe just like the old days with the Active plugin in IE.
402.
by SigmundA 4y ago
While I don't trust Adobe to make secure software, the existing PDF viewer in Chrome/Edge is PDFium [1] which was licensed from Foxit [2] and is C++ and has had its share of exploits. There is PDF.js [3] used in Firefox but it has
403.
by SigmundA 4y ago
Why wouldn't it work? Yes I believe all US combat aircraft still carry a gun, usually a 20mm Vulcan cannon: Here is the F22's: https://www.youtube.com/watch?v=f6GhVrVjArI
404.
by SigmundA 4y ago
I only played vanilla, but my pool at home with salt system has taught me that. It uses a 48v cell with 3000 ppm salt to create chlorine to sanitize the pool water. Many pools now days use this kind of system rather than chlorine tablets or
405.
by SigmundA 4y ago
I have to believe Itano Circus was inspired by Saturn rocket fireworks, at least that what I though as a kid. https://www.youtube.com/watch?v=IS_7nY19kXw
406.
by SigmundA 4y ago
Just have a suspendLayout resumeLayout / beginUpdate endUpdate method like Winforms surprised doesn't exist after all these years
407.
by SigmundA 4y ago
15% is lost in refining.
408.
by SigmundA 4y ago
You can burn unrefined oil at a power pant at 40%+ efficiency saving the losses in the refining step and with all the complicated emission controls not in the vehicle.
409.
by SigmundA 4y ago
Power plants can burn crude oil directly without refining at a higher efficiency than a gasoline engine with much more sophisticated emission controls. Power is then transmitted by the grid at about 5% loss vs transporting with tanker truck
410.
by SigmundA 4y ago
If you primarily look up by the primary key which is pretty common the clustered index is faster than looking up the primary key in a standard index then finding the row in the heap for the other columns. If you make the standard indexing c
411.
by SigmundA 4y ago
Not the same, this is called a clustered index or index organized tables. With a covering index in PG you still have a heap storing the rows and a copy of the covered columns in the index. With clustered indexes or IOT's the table is t
412.
by SigmundA 4y ago
Makes most sense for server to reuse across all connections regardless of client, big iron db's have been doing this forever, multiple app servers remember. Even beyond that PG is per connection, so even multiple threads/connectio
413.
by SigmundA 4y ago
Or there could just be a hint that says do it in source code order: https://learn.microsoft.com/en-us/sql/t-sql/queries/hints-tr... There could also be hints that tell what kind of join to use and which
414.
by SigmundA 4y ago
+1, planner is great and all, but I know better sometimes, let me tell it so and have it listen. Nothing like the planner deciding it knows better at some random time in production because of data changes.
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by SigmundA 4y ago
>Reduce the memory usage of prepared queries Yes query plan reuse like every other db, this still blows me away PG replans every time unless you explicitly prepare and that's still per connection. Better full-text scoring is one for
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by SigmundA 4y ago
Coal is under 20% now in the US and dropping: https://www.eia.gov/todayinenergy/detail.php?id=48896 Even if you still run off coal you are decoupling energy source from the vehicle allowing the vehicle to run off any s
417.
by SigmundA 4y ago
Hard to find more mundane details, interested in how they power it. Do they PTO off engine with big alternator as 50 kw is about 67 hp. I would guess some kind of buffer battery or capacitors. A small lithium bank could do 50 kw for a short
418.
by SigmundA 4y ago
>ICE vehicles conquered the world with abysmal efficiencies, they were around 10-15% when they already ruled the roads and the world. Fossil fuel comes out of the ground with the energy already in it, hydrogen doesn't exist in a fre
419.
by SigmundA 4y ago
Nobody wants a tiny van sized version with all that carry capacity, instead it would be a stretched super C: https://electrek.co/2022/12/03/tesla-semi-electric-motorhome... You can already buys similar things
420.
by SigmundA 4y ago
Math does not work out, series hybrid will be around 80% efficient while mechanical direct drive is 95%+. This is why nearly all hybrids are parallel and at highway speeds directly connect engine to wheels. Trains do diesel electric for pr

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