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Surprising Result of NYC Bike Lanes: Faster Traffic for Cars

vrt3 Re:Bikes lanes are nice (213 comments)

Motor pacing is more than just a little bit of aerodynamic resistance reduction. Even riding behind another cyclist already results in 40% power reduction. And Fred Rompelberg's configuration was pretty extreme: see

about two weeks ago

Surprising Result of NYC Bike Lanes: Faster Traffic for Cars

vrt3 Re:Bikes lanes are nice (213 comments)

40 mph is not exactly easy.

Even professional road bicycle racers reach such speeds only on downhills or in sprints; see e.g. "Individual riders can approach speeds of 110 km/h (68 mph) while descending winding mountain roads and may reach 60â"80 km/h (37â"50 mph) level speeds during the final sprint to the finish line."

40 mph is *fast* on a non-recumbent bicycle. The fastest I personally can do on level road without other traffic is about 50 kph, for maybe ten seconds. That's only 31 mph. With a not-too-bad racing bicycle and a reasonable fitness level. 40 mph (about 64 kph!) is for most people totally out of the question.

about two weeks ago

Smart Cars: Too Distracting?

vrt3 Re:Only while stationary (180 comments)

But the system should make an exception when it senses that there is someone in the passenger seat.

My previous car dissallowed control of the navigation system while driving, even when there was someone in the passenger seat who was perfectly able to safely control the navigation system. Very frustrating at times.

about 9 months ago

The Climate of Middle-Earth

vrt3 Re:Yeah, but... (163 comments)

There is no unit 'degree Celsius'. Just like with Kelvin the official unit is without 'degree'!

Do you have a citation for that? Wikipedia [] seems to disagree.

I agree that much of this is academic and not relevant in everyday speech. But I think even there you are wrong: according to your previous post the "degree" part is optional, but in everyday speech it's the "Celsius" part that's left out (to which I have no objection whatsoever).

about 9 months ago

The Climate of Middle-Earth

vrt3 Re:Yeah, but... (163 comments)

The unit is "Kelvin" or "degrees Celsius". Sometimes people add "degrees" to Kelvin, but that's incorrect and I've only ever heard non-sciency people do that. People often do omit Celsius or Fahrenheit, and I think there's nothing wrong with that when talking about the weather or other everyday temperatures.

You're saying the unit is "Celsius" and you can optionally prefix it with "degrees"? I've never heard it explain that way. Seems very weird.

about 9 months ago

Mark Shuttleworth Apologizes for Trademark Action Against Fix Ubuntu

vrt3 Re:Illustration of the issue (196 comments)

Perhaps instead you should have contacted their marketing department, and asked them to sponsor your kites for a small sum of money. In return for their money you could promise them to put their logo on your kites.

Just a thought on a lazy sunday evening.

about 10 months ago

Bill Gates Acknowledges Ctrl+Alt+Del Was a Mistake

vrt3 Re:Why would you want a single button??? (665 comments)

This is not about Ctrl-Alt-Del to reboot; it is about having to press Ctrl-Alt-Del in Windows if you want to log in. This was implemented IIRC in Windows NT and Windows 2000, and in Windows XP if it was joined in a domain.

about a year ago

Team Oracle Penalized For America's Cup Rules Violations

vrt3 Re:Explanation... (190 comments)

If people google for "java download" they get this page: . On that page there is a big red button called "Free Java Download". That's the most straightforward way to download Java, and it gives you an installer with the toolbar (at least on Windows; I don't know on other platformst).

Not only that: even if you install Java from a non-toolbar installer, the automatic updates (if they even work) use the toolbar-version of the installer AFAIK.

That's why people say there's a toolbar in the Java installer.

1 year,19 days

The World Fair of 2014 According To Asimov (From 1964)

vrt3 Re:Did he ever revisit these predictions? (352 comments)

Asimov was on a TV show where the host asked him about his earlier prediction that the world would only have five computers. Asimov asked that the question be cut, where the confused newscaster pointed out it was a live show. So Asimov walked out of the interview.

Citation needed.

AFAIK Asimov never said that; it was an IBM executive, IIRC.

1 year,27 days

Interviews: Guido van Rossum Answers Your Questions

vrt3 Re:whitespace (169 comments)

What I don't get is that there aren't more people complaining about the syntax for functions like range(), where the lower limit is inclusive, but the upper limit is exclusive. Can anyone explain to me how that makes sense?

See "Why numbering should start at zero" by Edsger W. Dijkstra:

1 year,28 days

Kernel Dev Tells Linus Torvalds To Stop Using Abusive Language

vrt3 Re:not someone new (1501 comments)

As far as I understand Sarah's mail, her reaction was not to that sentence, but to Linus' conclusions:

> So Greg, if you want it all to change, create some _real_ threat: be frank
> with contributors and sometimes swear a bit. That will cut your mailqueue
> in half, promise!


> You may need to learn to shout at people.

Overall I think I agree with Sarah: it is perfectly possible to be frank and clear without swearing and shouting.

about a year ago

Groupon Still Losing Money, CEO Is Fired And Leaks Final Email

vrt3 Re:Battletoads? (207 comments)

I for one had never heard of it before, I'm afraid.

about a year and a half ago

John E. Karlin, Who Led the Way To All-Digit Dialing, Dies At 94

vrt3 Re:upside down keypads? (120 comments)

..., but I really don't think the average person enters enough numbers to even bother using the numeric keypad on a computer - it would be interesting to see a study showing if the typical person even uses it at all).

People do in countries that use AZERTY, because on AZERTY keyboards you have to use shift or caps lock to access the digits in the top row. Much easier to use the numeric keypad.

about a year and a half ago

Highway To Sell: AC/DC iTunes Snub Finally Over

vrt3 Re:Violating the sanctity of "Givin the Dog a Bone (247 comments)

(note: the "Title track" leads off side 2 rather than 1, which is interesting, but it works).

This happens on many albums. Some time ago I read the reason for that, but I forgot what it was. It's not only on vinyl; even on CD the title track is often around track 6-7.

about 2 years ago

Unredacted Filings Reveal Claims of Juror Misconduct in Apple vs Samsung Trial

vrt3 Re:I think for lying during selection (282 comments)

All of that is irrelevant, he was asked by the judge to list all previous cases he'd been involved in and he didn't mention this specific one.

Citation please. Can you show exactly where the judge asks that?

about 2 years ago

Promoting Arithmetic and Algebra By Example

vrt3 Re:an example where algebra is useful? (158 comments)

Still it's not as bad as measuring rainfall in liters per square meter like we do here in Spain.

I'm wondering, what exactly is the problem with that unit? Which alternative would you prefer?

Because if it's mm that you prefer, you're maybe interested to know that liter per square meter is exactly the same as mm:

liter / m^2 = dm^3 / m^2 = (10^-1 m)^3 / m^2 = 10^-3 m^3 / m^2 = 10^-3 m = mm

about 2 years ago

Goodyear's 'On TheGo' Self Inflating Tire

vrt3 Re:Neat (207 comments)

But imagine what happens if this explosion happens while driving at highway speeds.

about 2 years ago

Ask Slashdot: Hearing Aids That Directly Connect To Smart Phones?

vrt3 Re:Hearing aids have been discussed before (183 comments)

Same here. In hearing tests everything is ok, I can still hear relatively high frequencies. But in a loud environment, it is *very* difficult for me to understand what people are saying, and it's also difficult for me to speak myself -- because I can't hear what I'm saying, I guess.

Even in a moderately noisy environment (think busy cafeteria with the background noise of everybody talking and maybe some music playing) it is difficult and tiring, but still doable, to participate in conversations.

about 2 years ago



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