SigmundA

31 ms·

421.
by SigmundA 4y ago
Hybrids main use are stop and go urban vehicles, on the highway at constant speed nothing beats a diesel. In gasoline vehicles you can go Atkinson cycle so that the gas engine approaches diesel efficiency with a loss of torque which is made
422.
by SigmundA 4y ago
According to the Winnenbago rep that I heard talking when I saw it in person they are just working out the systems and design issues so they are ready when the range catches up. This van had a 48v house battery that ran air conditioner and
423.
by SigmundA 4y ago
Saw this at the Tampa RV show, it's just a tiny Class B, definitely needs more range but neat to see the progress. My 35ft 30,000 lbs diesel Class A RV has a 800 mile range so will be a while before it interests me. What I am waiting f
424.
by SigmundA 4y ago
RV heat pump are not that sophisticated because there doesn't seem to be much demand, they simply flip over to furnace. They are the same on the cooling side, they are no where near as advanced as a modern variable speed mini split. Th
425.
by SigmundA 4y ago
An electric car can, in my area they burn garbage for electricity: https://pinellas.gov/waste-to-energy-facility/
426.
by SigmundA 4y ago
Hitting print in the browser or calling Window.print() if you want to force the dialog. If you serve a PDF you still need to hit print or use dialog to save, you can use a headless browser server side to serve that if needed. I do think bro
427.
by SigmundA 4y ago
There are a lot of procedural tools for generating HTML, lots, if modern browsers fully supported print CSS then you could use them for complex PDF generation, or direct printing, either client side or on the server headless. If your app is
428.
by SigmundA 4y ago
I believe browsers have been repeating table headers on printed output for some time. Page media CSS is designed for this although most browsers don't fully support it, PrinceXML is the go to for full paged media support. IMO they are
429.
by SigmundA 4y ago
In .Net/C# this is done with IDisposable and the using statement which works quite well. Ex: using (var sr = new StreamReader(filename)) { txt = sr.ReadToEnd(); } https://learn.microsoft.com/en-us/d
430.
by SigmundA 4y ago
In my area it's about 2.6x so a heat pump only needs to have a COP of about 2.4 to equal the cost of natural gas per unit of heat delivered when compared to a 90% efficient gas furnace. These modern air source low temp heat pump can ma
431.
by SigmundA 4y ago
It's not so much a worry as an efficiency thing. If your in a cold climate that needs resistive heat its a lot less efficient to burn natural gas at power plant at 50-60% then turn to heat with a resistor in your house, than to burn it
432.
by SigmundA 4y ago
Need to check my math but a heat pump that can do a COP of at least 2 powered by a 60% efficiency natural gas power plant should be more efficient than a 90% efficient natural gas furnace. That's not even counting a renewable/nucl
433.
by SigmundA 4y ago
5G towers dont just have a 500 meter range, low band is the same as 4G and C mid band is more than 500 meters. 5G doesn't just mean millimeter wave.
434.
by SigmundA 4y ago
True and we have a lot of natural gas and in a pinch we can run our vehicles off coal if needed even if not ideal. The flexibility of the power source due to decoupling seems so often overlooked especially when thinking about energy indepen
435.
by SigmundA 4y ago
See Lithium-Sulphur which has a theoretical limit of ~2500 wh/kg vs ~250 wh/kg of todays lithium batteries. So you're looking at up 10x improvement, if we can get to 1000 wh/kg that's your 4x. https://en.
436.
by SigmundA 4y ago
The energy density is partially offset by the higher cycle life of LFP even while charging to 100% SOC. For instance Tesla recommends an 80% charge for daily unless you know you are going to go a long trip, while on their LFP version they
437.
by SigmundA 4y ago
No its not overlooked, its called wheel to well efficiency and EV's are more efficient than ICE even if run off fossil fuels at a power plant, which it won't completely since even the US has a renewable/carbon free mix of abo
438.
by SigmundA 4y ago
Probably not, in the new movie they where very dragonfly like too and looked quite realistic, but man the engineering a materials science to make that practical, not sure: https://www.youtube.com/watch?v=qYPuhItRqVk
439.
by SigmundA 4y ago
>When you say object "instances" of "types" then what you're referring to is a strong schema. Yes that's exactly what I said. .Net is a strongly typed language with a strongly typed data model, hence my poin
440.
by SigmundA 4y ago
That means at the storage level it's storing a JSON data model not a .Net one. That means the length of a property name matters because its stored with every document rather than having the type info stored in a schema and the individu
441.
by SigmundA 4y ago
>The tables themselves aren't btree indexes, there isn't any sort of "clustered" index on all columns. It's just that the tables rows are entries in a btree, indexed by rowid. That's what a clustered index i
442.
by SigmundA 4y ago
Yes not my cup of tea. Had some poor experience with it in the past and don't really like its design philosophy unless somethings changed. Stores data as BSON I believe, which is better than text JSON I guess, but pretty ineffecient co
443.
by SigmundA 4y ago
InnoDB is similar to SQLite all tables are clustered indexes, if you don't have suitable primary key it creates a hidden one similar to rowid in SQLite. MSSQL and Oracle give you a choice for table storage to either have unordered heap
444.
by SigmundA 4y ago
What's not true? All tables in SQLite are b-tree indexes, the unique key is either the rowid or the primary key in "WITHOUT ROWID" tables. SQLite does not have unordered heaps: https://www.sqlite.org/lang_crea
445.
by SigmundA 4y ago
SQLite uses a b-tree storage format for tables, so all tables are an index, similar to clustered indexs in MSSQL Server and Index Organized Tables in Oracle. The RowID is the true primary key unless you specify the table should use the actu
446.
by SigmundA 4y ago
Nice reminds me of Linq, which looks like they acknowledge as one of their inspirations. SQL relational servers should really move more toward this kind of language. I always thought just building a pure .Net DB server using its types and l
447.
by SigmundA 4y ago
Full print/paged media support so Prince XML is no longer needed.
448.
by SigmundA 4y ago
With a 500 full cycle to 80% capacity, that two years if you drained it 100% to 0% every day and the battery still has 80% of its original capacity. To get to 50% capacity should be 5 years, again only if you ran your battery down empty eve
449.
by SigmundA 4y ago
I agree, there are physical compromises that will have to be made for removable batteries. The phone will be bulkier or have a smaller battery and the overall design more complex even more so to achieve the same waterproofness. Meanwhile I
450.
by SigmundA 4y ago
This seems pretty similar to profile guided optimization that say Java or .Net or Javascript can do since since it has access to runtime data during JIT Compilation.

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