## Search found 1038 matches

Tue Aug 07, 2018 11:35 am UTC
Topic: 2028: "Complex Numbers"
Replies: 48
Views: 2464

### Re: 2028: "Complex Numbers"

If I'm not mistaken, the multiplication operation means that complex numbers are not vectors. R 2 tuples are not vectors either. They are coordinates. he product of two complex numbers has an angle which is the sum of the angles of the the two original numbers relative to a fixed frame of reference...
Mon Feb 26, 2018 7:05 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

One flight on a modern airliner is about as dangerous as 10 km by a car. I assume cars would be similarly safe if they were guaranteed at least a half-kilometer of empty space in every direction*. Can't we just say them that humans are too bad at collision avoidance, and we would like autonomous ca...
Sat Feb 24, 2018 9:50 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

What does it have to do with "GPS mapping"? Read Pfhorrest's reply . I don't see anything that I could recognize as "GPS mapping" there. Can you give a definition? Is lane changing "navigation" or "control" in your terms, and why? Lane changing (itself) is &q...
Sat Feb 24, 2018 8:40 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

Jose is obviously talking about cars driving by using a remotely-supplied map of where roads are, and a GPS signal to tell where itself is, and navigating based entirely on that; and he's saying that that's a terrible idea and should not be done, That's a terrible and useless idea, as GPS has neith...
Sat Feb 24, 2018 7:10 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

So, not a big percentage of your turns were non-predicted but made with the normal speed of traffic, and you don't really know your safety statistics on those? I don't even understand the question. I have never been in an accident that was due to poor navigation (location-on-a-map awareness). All o...
Fri Feb 23, 2018 8:46 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

I don't have a number for you, but it's definitely nonzero. I've been known to just get in the car and go.... second star to the right and onward 'till morning. Ok, not literally 'till morning, but enough to know that I do not need a map or GPS to avoid hitting things. I've also driven in several f...
Fri Feb 23, 2018 7:03 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

"What your eyes tell your brain" alone is not enough to drive safely with the speed of traffic. I've done it for years. Snow, rain, night, dirt roads, even diagonally across a parking lot. No map, no GPS, just eyes, a gas pedal, a steering wheel, and a brake. What percentage of your drivi...
Fri Feb 23, 2018 5:24 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

I build a map using visual clues, memory and (when available, which is almost always) navigational assistance. Perhaps we differ on the definition of "map". I am referring to the kind of map used for navigation; a paper version of which used to be carried in a glove compartment. You seem ...
Fri Feb 23, 2018 2:26 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

It would be very nice of you to share your idea how to do that without maintaining a local map, because people who develop autonomous cars for a living keep telling me at weekly team meetings that it's impossible, and maintaining such a map is indeed the hard part. How do you do it? I don't. I buil...
Fri Feb 23, 2018 10:49 am UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

You don't need a map to drive safely. A map is only needed to decide where to drive to and how to get there. But the hard parts; the staying on the road, not hitting things or scaring others into doing so, not modifying the bodywork on the fly... none of that needs a map. It would be very nice of y...
Thu Feb 22, 2018 11:41 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

Machine vision (sensing what's really there) should be used for all primary driving tasks. Navigation should be suggested by GPS and other mapping technologies, Actually, machine vision for cars is (mostly) mapping. Building a 3+1D map from visual clues. Vision for moving humans is mapping too. but...
Thu Feb 22, 2018 1:27 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

speising wrote:the problem with digital road infrastructure: there will be iBeacons, Google beacons, Amazon beacons, and Tesla beacons,

*) subject to FCC approval
Thu Feb 22, 2018 12:16 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

I'm one of the worst murderers in the world: Kill count: 0 Yet. You can be a time vulture . Hand written signs (machine vision has to read handwriting to know where the diversion is going) In ten years from now, it could be the other way around: road workers would put the virtual signs into the onl...
Wed Feb 21, 2018 7:23 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

stilettoblade wrote:Or the survivors will be the ones that were the very best at it...

Still I think that the people that are the very best at being murderers are not the worst of them.
Wed Feb 21, 2018 7:03 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

TL;DR - If you know a car is going to stop when you step into the street, why not simply step into the street whenever you like? There are still people inside, and they can be quite nasty to you. one concern I've heard is this: providing enough parking is expensive and finding it can take time. If ...
Wed Feb 21, 2018 6:30 pm UTC
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 19569

### Re: 1958: "Self-Driving Issues"

1) You vastly underestimate the power of human vision (eye+brain). Consider seeing a person you haven't seen in a decade. They could have a completely different hairstyle; they'll be wearing clothes you've never seen them in. But enough of their facial features, movements, etc. will allow you to re...
Mon Feb 05, 2018 6:43 pm UTC
Topic: 1951: "Super Bowl Watch Party"
Replies: 23
Views: 4935

### Re: 1951: "Super Bowl Watch Party"

cellocgw wrote:Actually, it's more like the reverse of OTTer life: we could have watched in real time,

Fri Jan 19, 2018 4:07 pm UTC
Topic: 1944: "The End of the Rainbow"
Replies: 48
Views: 6294

### Re: 1944: "The End of the Rainbow"

Mutex wrote:Yes, we have milliard etc. I guess that would be more logical then.

One can have milliard[s] and still use short scale, like in Russia.

Billiard[s], though, is a slightly different thing.
Mon Jan 08, 2018 8:03 am UTC
Topic: 1938: "Meltdown and Spectre"
Replies: 36
Views: 5543

### Re: 1938: "Meltdown and Spectre"

rmsgrey wrote:A system designed from the start to not do things it shouldn't rather than to do things it should is going to be less efficient at doing things generally

I'd say it's simply impossible. There is no way to guaranteedly protect a system against side-channel attacks not known in advance.
Sat Jan 06, 2018 5:38 pm UTC
Topic: 1938: "Meltdown and Spectre"
Replies: 36
Views: 5543

### Re: 1938: "Meltdown and Spectre"

Humans a freaking awesome, but we've created things, by working together, that none of us can fully understand. I'd say this is true for any social animal, because it's a prerequisite of an evolutionarily stable society. ...well, it might be not true for societies that develop so fast that they nev...
Fri Jan 05, 2018 10:15 pm UTC
Topic: 1938: "Meltdown and Spectre"
Replies: 36
Views: 5543

### Re: 1938: "Meltdown and Spectre"

I think this, like rowhammer, shows mostly that we are getting sufficiently good at software security that attackers have to exploit the hardware. Actually, Heartbleed is only about 2 months older than rowhammer. The problem of course is that hardware isn't quite as easy to fix as software. Sometim...
Fri Jan 05, 2018 9:43 pm UTC
Topic: 1938: "Meltdown and Spectre"
Replies: 36
Views: 5543

### Re: 1938: "Meltdown and Spectre"

Pfhorrest wrote:I fail to see what moral dilemmas like the Trolley Problem have to do with speculative execution.

That depends on the approach.

Philosophically, it has nothing. Practically, it has a lot. Humans have a kind of speculative execution, too, and that can also be hacked by timing.
Tue Jan 02, 2018 5:23 pm UTC
Topic: 1936: "Desert Golfing"
Replies: 24
Views: 4634

### Re: 1936: "Desert Golfing"

Reminded me of this.

I wonder if it's intentional.
Sun Nov 05, 2017 4:22 pm UTC
Topic: 1911: Defensive Profile
Replies: 47
Views: 5957

### Re: 1911: Virtue Signalling Volume 7

Mikeski wrote:On the Devil's Advocate side, I offer the very existence of the term "microaggression".

Is the term "cooties" also the Devil's invention?
Sun Nov 05, 2017 1:57 pm UTC
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 7194

### Re: 1909:"Digital Resource Lifespan"

Is now a good time to point out that the BBC hates Doctor Who because they destroyed a bunch of episodes from the 60s and 70s? Never mind that they did that to every show at the time, and Doctor Who is the second most preserved show of the era - it's clearly all part of a deliberate conspiracy by t...
Sun Nov 05, 2017 11:21 am UTC
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 7194

### Re: 1909:"Digital Resource Lifespan"

What "writing style"? Disgusting. Made of hateful rant. Gosh. My article barely rises about wry disdain for people who don't check their facts and those who distort history to fit an ideological agenda. That's not true. You resort to name calling ("New Atheists"), although, as y...
Sat Nov 04, 2017 10:11 am UTC
Topic: 1911: Defensive Profile
Replies: 47
Views: 5957

### Re: 1911: Virtue Signalling Volume 7

Why do people think this? Why on earth would anyone choose to be offended by something? It's a bad feeling. It's like those people who tell depressed people to "just cheer up" and "you're choosing to be miserable". Motherfucker I cannot control how I feel, that's almost the defi...
Sat Nov 04, 2017 9:44 am UTC
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 7194

### Re: 1909:"Digital Resource Lifespan"

What "writing style"? Disgusting. Made of hateful rant. It seems you didn't read my article very carefully at all. That's what I said. Firstly, I detail several scholars in the sixth century, one probably Christian and the others definitely so, who who were not just "interested in Ar...
Fri Nov 03, 2017 9:33 pm UTC
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 7194

### Re: 1909:"Digital Resource Lifespan"

He can be overly polemical at times, First of all, I found there no justification for your "Not true". Granted, that writing style didn't encourage me to try very hard... ...but still, mentioning that one possibly Christian guy paid attention to Archimedes in the 5th century (or whenever,...
Fri Nov 03, 2017 5:17 pm UTC
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 7194

### Re: 1909:"Digital Resource Lifespan"

Do you enjoy reading that crap?
Fri Nov 03, 2017 5:02 pm UTC
Topic: 1911: Defensive Profile
Replies: 47
Views: 5957

### Re: 1911: Defensive Profile

I don't understand a lot of things, but I don't need to convince myself that's OK, so I don't put such silly stuff in my profiles.
Tue Oct 31, 2017 7:04 pm UTC
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 7194

### Re: 1909:"Digital Resource Lifespan"

Isn't it more a problem of abundance of digital information potentially worth keeping than of longevity of digital media?
Tue Oct 31, 2017 5:18 pm UTC
Topic: 1906: "Making Progress"
Replies: 21
Views: 4485

### Re: 1906: "Making Progress"

FOARP wrote:1) Boss gets idea that a list of tasks related to subject X maintained on a shared server would be a good idea.

That's what an ITS is for. Install Redmine.

Spreadsheets are a good visuospatial tool, and should be used as such.
Mon Oct 30, 2017 11:28 am UTC
Topic: 1906: "Making Progress"
Replies: 21
Views: 4485

### Re: 1906: "Making Progress"

My working theory is that all this spread-sheet making you find in many businesses for tasks to be done is little more than an aide-memoire and doesn't actually increase the level of organisation in anyway above that which a hand-written list would. Spreadsheet is for handling numbers. I'd say an o...
Sun Oct 29, 2017 5:12 pm UTC
Topic: 1906: "Making Progress"
Replies: 21
Views: 4485

### Re: 1906: "Making Progress"

My wife would also benefit from it.

Right now, I'm trying a personal Redmine instance on AWS free tier. Looks promising so far.
Thu Oct 26, 2017 5:05 pm UTC
Topic: 1906: "Making Progress"
Replies: 21
Views: 4485

### Re: 1906: "Making Progress"

By the way., does anyone know a good personal issue tracker system?
Mon Oct 23, 2017 6:23 pm UTC
Topic: 1904: Research Risks
Replies: 62
Views: 6706

### Re: 1904: Research Risks

xtifr wrote:I think anyone who has read 1984 would argue that linguistics should be higher on the chart.

But that was speculative fiction. Humans don't work this way.
Wed Oct 18, 2017 2:51 pm UTC
Topic: 1904: Research Risks
Replies: 62
Views: 6706

### Re: 1904: Research Risks

wgrandbois wrote:Either Randall has a pretty narrow definition of paleontology, or he's never seen / read "Jurassic Park."

Isn't that technically "Genetic Engineering"?
Thu Oct 12, 2017 5:31 pm UTC
Topic: 1901: "Logical"
Replies: 24
Views: 4055

### Re: 1901: "Logical"

udqbpn wrote:Yeah... I don't need a scientific study for every idea I have, I can have hunches, right?

That's one of the problems of trying to be fully logical: which criteria would you use to study the relevance of the scientific method... and why these, and not something else?
Wed Oct 11, 2017 8:47 pm UTC