retrac

29 ms·

361.
by retrac 2y ago
It's fun with software radio to take a long recording of a chunk of spectrum and do the fourier transform and plot it. There will be clear lines indicating carriers, even ones too faint to be heard over the static. Software can do th
362.
by retrac 2y ago
The signal is not 60 kHz wide. It is at 60 kHz. A pure carrier with no modulation has the inverse of infinite bandwidth. (Assuming perfect transmitters, which can't really exist, of course.) The faster you modulate the signal, the
363.
by retrac 2y ago
It's fairly easy... if you also speak French, Italian, Latin, and probably Ancient Greek. I don't and I know I missed a lot. I remember a lot of bilingual French/English wordplay through worked. He was multilingual and the
364.
by retrac 2y ago
The real cost of food has steadily decreased for the last 200 years. (Much of the decrease was before 1980, though.) Here in Canada, one hour of labour at minimum wage, will buy you a 10 kilogram bag of flour, or 4 litres of cooking oil.
365.
by retrac 2y ago
The original Game Boy and Tamigotchi weren't colour, or backlit, and they were disruptive in classrooms when they came out. For at least some individuals, even simple black and white, non-networked games, are kind of compulsive. This
366.
by retrac 2y ago
If it is not controlled by the immune system, it causes general neurological disorder, potentially severe (Parkinson-like, dementia, brain damage), and can start to invade other organs. This is uncommon except in people with serious immune
367.
by retrac 2y ago
There are antibody tests to show if you've ever had it, and approximately how intense/active the infection is. Mild latent and recent past infection is hard to distinguish apart from an antibody test alone. Decreasing antibody c
368.
by retrac 2y ago
The sun also emits in the visible wavelengths. Your eyes do not feel pain from bright lights due to the heat or similar. It's a response to brightness, in the visible spectrum. Without the visible component, there's no pain.
369.
by retrac 2y ago
* = [] and friends can be overloaded in C++. So just about any kind of data structure can masquerade as items[3] or *value. Opinions differ on whether this is the great strength or fatal flaw in C++.
370.
by retrac 2y ago
In assembly, arrays and structs reduce to base address, plus offset times scaling factor. C provides a thin veneer over that. Scaling derived from size of type. Offset is the array index. The basic programming model of C is to view memor
371.
by retrac 2y ago
Flow control involving recursion is already well into the weeds. Recursion and exceptions is probably a nightmare for someone not fond of ML or Lisp.
372.
by retrac 2y ago
Signals are at the intersection of asynchronous IO/syscalls, and interprocess communication. Async and IPC are also weak points in the original Unix design, not originally present. Signals are an awkward attempt to patch some async
373.
by retrac 2y ago
Similar for me. It feels like hunger, or sleep deprivation. I think it's detected by system 2, from an awareness of cognition not being great, in general. It's like a touch of delirium. Hunger as a response to mild dehydration
374.
by retrac 2y ago
A verbal contract, which has no record at all, can also be legally binding.
375.
by retrac 2y ago
The standard pulse rate is 10 pulses per second. So 999 takes a bit more than 3 seconds to dial. Three seconds is no doubt a long time subjectively in an emergency -- but it is still much shorter than what it replaced -- calling the full
376.
by retrac 2y ago
It's similar in Canada; permanent residents and citizens have the legal right to reentry and it can't be denied. But that right applies to you , not anything you are carrying. Play that game and you'll probably lose the de
377.
by retrac 2y ago
Different software. They had different APIs from the programmer perspective. MacTCP was older and was based on Berkeley sockets (I think with some BSD code in the implementation?) and was somewhat primitive. OpenTransport was fully multit
378.
by retrac 2y ago
If you want the best possible view with the naked eye, give them a chance to adapt to the dark properly. The human eye is about 100,000 more sensitive after an hour in total darkness. A smartphone screen or car headlight is enough to undo
379.
by retrac 2y ago
If the United States were invaded on the east coast, and the invaders were stopped at the Mississippi, and the US then carried on with its capital in Sacramento for the next 1000 years, do you think the executive would no longer be called t
380.
by retrac 2y ago
The hypoxia/suffocation instinct, the irresistible urge to breathe, is caused by carbon dioxide levels in the blood. The nervous system has no means of directly detecting oxygen, or its absence. If you walk into a room of pure nitrog
381.
by retrac 2y ago
Most of the cost of energy is the fossil fuels themselves, or taxation to discourage use. The cost of photovoltaic power seems to be governed by a scaling law, that has held for several decades now. [1] It is now cheaper than fossil fuels
382.
by retrac 2y ago
That depends a lot on what you want to use it for. A Z80 can stream data to/from RAM at several hundred kilobytes a second, do binary search at tens of kilobytes per second, or calculate hundreds of floating point values a second wit
383.
by retrac 2y ago
I don't usually mix, so much as just forget. C is my first proficient language. But honestly, if I step away from it for just a few months, I will forget things even like the syntax for how to declare a struct (there's an ; afte
384.
by retrac 2y ago
We had a minor scandal here in Canada. The same company behind Vuse vapes (Imperial Tobacco of Canada) got approval for an oral product that falls in the same category as nicotine gum, legally. Not heavily controlled. The regulators had
385.
by retrac 2y ago
> The Chief Engineer of the Manhattan District, Colonel James C. Marshall, and his deputy, Lieutenant Colonel Kenneth D. Nichols, discovered that the electromagnetic isotope separation process would require 5,000 short tons (4,500 tonnes
386.
by retrac 2y ago
Many modern brick buildings, have a wood structure with steel brackets, and the brick is only facing, and is not what is holding up the roof. Older brick homes do have brick structural walls or pillars inside, but in recent decades those a
387.
by retrac 2y ago
The electrical distribution grid where I live is mostly wood and pottery.
388.
by retrac 2y ago
Of course. And bone and antler, too. One of the primary techniques for manufacturing stone tools - shared by Neanderthals and probably other pre-human hominids - was (is?) using a piece of wood or bone, as the hammer. The wood is softer,
389.
by retrac 2y ago
> While stories such as Beauty and the Beast and Rumplestiltskin were first written down in the 17th and 18th century, the researchers found they originated “significantly earlier” There are thematic similarities between the ancient Indo
390.
by retrac 2y ago
There is nutrition in grass which is available to mammals like dogs (and humans). They are mostly cellulose, but plants use carbohydrates and proteins for their own structure and metabolism, and these are present in all plants in at least

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