gridspy

12 ms·

121.
by gridspy 3y ago
> Does the U.S. Copyright Office require libraries to lie about fair use rights? The grammar is bothering me. Thanks for your moderation either way.
122.
by gridspy 3y ago
The difference is subtle > One of these specified conditions is that the photocopy or reproduction is not to be “used for any purpose other than private study, scholarship, or research.” "[I]s not to be used for any purpose other th
123.
by gridspy 3y ago
I doubt it motivates you to travel home for lunch! It sounds like you'd be very unlikely to enter downtown for any other reason. Also, may I suggest you move your home or employment? 3 hours is a lot of commuting and that is bad for yo
124.
by gridspy 3y ago
Often missed here is that the Rust library author is strongly protected from faulty code written by Users. The C/C++ library author is not. The most obvious examples of this are memory allocation. The C/C++ user claimed the buffer
125.
by gridspy 3y ago
It's mentioned in the paper, since W-TinyLFU is a means of qualifying things prior to going in the cache. That process is called QD in TFA. They refer to the W-TinyLFU paper as reference 34. > Moreover, admission algorithms, e.g., T
126.
by gridspy 3y ago
It is the same size as the traditional cache, but it is also a FIFO. Naturally it doesn't need to worry about tracking access, since the moment the ghost cache is "hit" the relevant memory location is loaded into the traditio
127.
by gridspy 3y ago
Useful summary. Made me want to read about the ghost cache. The cache layout is: Probationary 10% + Traditional 90% (of memory). The idea is that most items are not requested again prior to dropping out of probationary and so don't tak
128.
by gridspy 3y ago
Obviously typing from start to finish with few edits is also a "failed" result in such a program. Someone actually writing an essay should be creating structure, taking notes, rearranging paragraphs etc. Then again you have a good
129.
by gridspy 3y ago
It's a good analogy. Invest in infrastructure to extract dirty air and deliver clean air into living spaces. Provide suitable standards and technologies to do so. It would be cheaper than the infrastructure to extract dirty water and d
130.
by gridspy 3y ago
I may be incorrect and they are now using explosive bolts. I've seen those mentioned elsewhere. However the engines were on the whole time, producing >1G of thrust along the direction of the booster. So that force is going to hold t
131.
by gridspy 3y ago
Software is full of constants you can estimate but need to measure to be sure. A few - How long fuel takes to load - How much is lost due to venting, how fast we need to recycle that to keep the ship on the pad ready to launch - Actual engi
132.
by gridspy 3y ago
This video filmed near the pad shows the huge chunks of debris from the pad hitting everything nearby (cars, cameras, etc) and is quite spectacular. https://www.youtube.com/watch?v=thA8jlgcJ-8
133.
by gridspy 3y ago
All Americian launches have a Flight Termination System (FTS) which is a bomb attached to ensure the off-course vehicle explodes before returning to earth. There are personnel in the control room who can activate the FTS when something goes
134.
by gridspy 3y ago
Until now, every kg we launch has been horrendously expensive. So all things in orbit and sent to other planets have lots of expensive design features to reduce weight or to reduce size in the fairing. StarShip is so huge and the reuse will
135.
by gridspy 3y ago
Once they realized they needed a flame diverter, I think they traded off the cost and delay of putting one in vs the cost of just filling the hole each time. It's totally feasible for them to keep testing and keep refilling that hole w
136.
by gridspy 3y ago
I feel like the N1 is unfairly demonized. They didn't have the benefit of modern closed loop computer flight controls that we have now. Detailed fluid dynamics simulations. Modern manufacturing techniques and production accuracy. N1 mi
137.
by gridspy 3y ago
What you've missed here is that failure points can only be guessed or simulated prior to testing. That analysis is often more expensive than the cost of a test and test article. So SLS does a LOT of analysis and manages to find and rec
138.
by gridspy 3y ago
> (there's a couple of landing failures, but given that everyone else apart from the space shuttle has a 100% loss...) Landing the shuttle is like landing the Dragon Crew capsule. SpaceX landed the booster, where shuttles ditch thei
139.
by gridspy 3y ago
To build on what you said: Elon Musk also said during one of the Tim Dodd interviews that the shuttle had so many limitations because they locked in the design too early. One limitation is the difficult, fragile and hard to reuse heat-shiel
140.
by gridspy 3y ago
Great post. I think a huge number of points were also put into the 10 seconds directly after liftoff. I.e, if the ship is going to fly, ensure it doesn't need termination in range of the tower. Anything to ensure the next test article
141.
by gridspy 3y ago
Methane rocket exhaust is steam and CO2. Where did the "pollution" come from? Are you suggesting they buried polluted dirt in the launch pad to distribute later? It's just like construction dust. It's unpleasant and inco
142.
by gridspy 3y ago
You missed the moon solution - use engines high off the ground (most of the way up the ship) for landing. Another idea (not starship specific) is to introduce cement (or similar) into the engine burn to build a landing pad from middair.
143.
by gridspy 3y ago
The booster is securely clamped to the launch stand. However the starship is only resting on top of the booster - the two parts of the ship are not clamped together. Launch clamps are released on command of the engine computer - i.e when it
144.
by gridspy 4y ago
You measure the voltage across the fuse. Then you look up the fuse's resistance in a datasheet. Current is Voltage / Resistance.
145.
by gridspy 4y ago
Because many items don't make sense without showing old deleted data. Imagine you run a shop with a list of products. People can order and receive products from you. View past orders and get invoices and recepts. One day you have a pro
146.
by gridspy 4y ago
Edit: the 50 year timeline was my childhood understanding. TIL it is far more complicated. https://www.earthobservatory.nasa.gov/features/CarbonCycle/p...
147.
by gridspy 4y ago
Plants only store the CO2 until they decompose a relatively short time later. The only way to end up with a net decrease in CO2 this way is to bury the plants deep. Of course that is the process that initially created coal.
148.
by gridspy 4y ago
Fortunately the CO2 does eventually leave our atmosphere, given about 50 years.
149.
by gridspy 4y ago
No, the story is that we begin the melting by raising the earth's temperature a little. You'd think that if we reduced our carbon emissions, the ice would stop melting. > But once the ice crosses the threshold, it would inevita
150.
by gridspy 4y ago
Unfortunately only barely. It would be nice to have a better ratio of fuel to payload. At least gravity isn't high enough to keep all chemical rockets earthbound.

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