EEGuy

15 ms·

61.
by EEGuy 13y ago
* Here [1] is a position-paper proposing an HVDC pan-European "supergrid" of up to 4KM distance, including undersea HVDC, overlaying and working with the existing, less capable AC grids. No magic, no HT superconductors, just recent evoluti
62.
by EEGuy 13y ago
Agreed, stunning it is that so common and reasonably safe a thing as a self-serve gas pump is a 22 MW chemical energy delivery system! Some reflections: * Perhaps an EV might be 10x as efficient with its input energy as a gasoline powered c
63.
by EEGuy 13y ago
* Consider that a few days ago there was a discussion of what Denmark's going to do with the excess electrical energy their offshore wind farms are generating [1]. They're dumping some of it off as heat into district water heating; it coul
64.
by EEGuy 14y ago
A quick check on wind turbine design for power generation [1] confirms to my satisfaction that all wind turbines should be throttable down to zero electrical output and then with good mechanical brakes [2] taking away the remaining kineti
65.
by EEGuy 14y ago
Not exactly. Since it was a subsidized system, with 'Net Metering', my utility sets the billing rules. Excluding the finer points, here's the gist of how the billing works: * My utility (Los Angeles DWP) accumulates a 'dollar banking' cre
66.
by EEGuy 14y ago
Here's a PV power estimator: http://rredc.nrel.gov/solar/calculators/pvwatts/version1/
67.
by EEGuy 14y ago
> Don't even consider solar panels until you've reduced energy needs first. Absolutely, asynch13! That's what I did. It took over two years, starting with a home energy monitor. Using a home energy monitor such as [1] or [2], one can
68.
by EEGuy 14y ago
* Confirmed, an F-1 engine stands tall [1] outside Rocketdyne corporate HQ on Canoga Ave just north of Victory Blvd in the San Fernando Valley of Los Angeles. One can walk right up to the engine and have a gander; it's 18 feet tall. You c
69.
by EEGuy 14y ago
Had to deal with accumulating noise and unpredictable rounding in a double precision supported application. Ended up scaling the amounts to integers, then converting those known and stable amounts to _character strings_ then doing the multi
70.
by EEGuy 14y ago
Coincidentally, the CISPA is up for debate again in the House. However you feel about such surveillance, it legal scope and extent is being democratically debated now. You can contact your Representative using this site: http://www.house
71.
by EEGuy 14y ago
Most basements don't look like Google's basements. Here's what I enjoy seeing, or find remarkable: * No leaks * No rust * Flow directions identified * Flow content/category/origin/destination identified by color * Room to move replacement
72.
by EEGuy 14y ago
Good on the original article to show the "Vdc" bias voltage (battery symbol) required to charge the diaphragm relative to the surrounding electrodes, and to show (conceptually) an inverting unity gain amplifier for one electrode of the sign
73.
by EEGuy 14y ago
Thank you Gravityloss for your correction. I do find that a brave integration -- using fuel as a coolant. Not an engineer in this field, but I'd imagine using fuel flow as coolant makes for a lighter-weight engine overall, even as it might
74.
by EEGuy 14y ago
Not to be missed is the fuel path of this (and other) liquid fuel rocket engine designs: The cryogenic fuel is piped about the "outer surface" of the rocket's nozzle and combustion chamber such that these essential structures doesn't melt a
75.
by EEGuy 14y ago
The scientific method can get iterative. Observe / purpose / hypothesis / experiment / result / conclusion. It gets harder when all one's hypotheses' test cases conclude out as "Well, it's wasn't that". Or when the bug's intermittent wit
76.
by EEGuy 14y ago
Indeed. VCS commit messages speak first to me in distinguishing the major "synch points" of a particular version's (branch's / shelf's / trunk's / tag's ) life cycle. Some of those synch points summarize an achieved goal (a concise "what
77.
by EEGuy 14y ago
Oh yes, very much so. As I use it, a Ticket can carry, as necessary: o A discovery and progress narrative, useful to regain working context after long interruption, fit neither for inline comments nor VCS commit comments. o A research and
78.
by EEGuy 14y ago
Expressing "The Five Ws"[1] (plus the "How") in and about code, adapts that excellent journalistic tradition [1]. I'm constantly trying to find a balance. Definitely the "Why" of a code change is most difficult to self-document. A style I'
79.
by EEGuy 14y ago
Nice work. The pro company that does this for broadcast is Sportvision, www.sportvision.com/
80.
by EEGuy 14y ago
Found this: The excellent Postgres documentation includes an SQL graph search with two different ways of graph cycle checking, here: http://www.postgresql.org/docs/9.0/static/queries-with.html One way involves accumulating an array of nod
81.
by EEGuy 14y ago
+0001
82.
by EEGuy 14y ago
I've had success getting rid of the scientific notation by just widening the column. Maybe that doesn't work all the time, I don't know.
83.
by EEGuy 14y ago
Doubtless there are more sophisticated ways to do this, but for a quick one-off, manual validation test on tabular data presented by a web page, I scrape it (highlight it) off the web page, hit ^C, paste to a text editor, do some reformat
84.
by EEGuy 14y ago
>Automatic type conversion is my favorite. Amen to that!! Yes, "Clippy" (Excel) gets a little too enthusiastic at times, but the missing piece here is metadata. So Clippy does what Clippy can without metadata, and the results can be
85.
by EEGuy 14y ago
Untouchable algorithmic integrity? History tracking? Data not easily corruptible by users? Accuracy in decimal amounts past 12 to 14 significant digits, particularly if fractionals involved? Huge data volumes? Mind-numbing repetitive t
86.
by EEGuy 14y ago
For ad-hoc, read-only query building on a Windows platform, I get a lot of mileage out of this quaint, non-CLI "toolchain": (1) pgAdminIII's query tool (not the tedious query builder, yes the bare SQL ("pencil" button) query tool, a plain t
87.
by EEGuy 14y ago
Quite a bit on what it takes to control a fuel cell stack in vehicle and stationary applications: www-personal.umich.edu/~annastef/FuelCellPdf/pukrushpan_thesis.pdf I find it interesting to read that: o To get the kind of highly variable "t
88.
by EEGuy 14y ago
Succinctly, I like to think of Bob Metcalfe and David Boggs as "The guys who figured out how wire works". In more detail: http://ethernethistory.typepad.com/papers/EthernetPaper.pdf
89.
by EEGuy 14y ago
There is a published picture [1] of one of the failed assemblies next to a normal assembly of the same type, sitting on a forklift pallet. It's easy to gauge the assemblies' physical size and count a minimum of 16 visible cells. Not visib
90.
by EEGuy 14y ago
Celko's SQL Puzzles and Answers: http://www.amazon.com/Puzzles-Answers-Kaufmann-Management-eb...

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