Search: Posts Made By: dougmc
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10-10-17, 10:26 PM
Replies: 46
Views: 4,421
Posted By dougmc

Unless the accused incriminates himself with...

Unless the accused incriminates himself with something like "teach them a lesson" (http://latimesblogs.latimes.com/lanow/2010/01/cyclist-sentenced.htm), intent is almost never shown to a degree...
07-04-15, 11:09 PM
Replies: 896
Views: 266,908
Posted By dougmc

That light is shipped with a 2s battery -- so it...

That light is shipped with a 2s battery -- so it maxes out at 8.4 volts. In general, those lights will work fine on a 3s battery (though this is not 100% certain), so 12.6 volts, and a car system...
05-31-15, 01:28 AM
Replies: 122
Views: 41,584
Posted By dougmc

It also makes the business end of the light not...

It also makes the business end of the light not *just fall off* like the Planet Bike Super Flash will do it you don't secure it with tape, rubber band or zip tie.
Forum: Commuting
05-12-15, 10:39 PM
Replies: 55
Views: 15,121
Posted By dougmc

No. Lux will just tell you how bright one spot...

No. Lux will just tell you how bright one spot is, typically the very brightest spot, in the middle of the bright spot made by the light.

But that depends on how far the surface is from the light...
Forum: Commuting
05-12-15, 12:51 PM
Replies: 55
Views: 15,121
Posted By dougmc

They're related, but they measure different...

They're related, but they measure different things.

Lumens measures total light (adjusted for how sensitive the human eye is to each wavelength of light, but we can generally ignore that part.)
...
03-07-15, 08:34 PM
Replies: 29
Views: 2,054
Posted By dougmc

I didn't say or even imply that it did. I also...

I didn't say or even imply that it did. I also invoked the largely tongue-in-cheek suggestion that number of blades in a razor blade might follow a similar progression, to further suggest that it...
03-04-15, 10:35 PM
Replies: 29
Views: 2,054
Posted By dougmc

The whole thing is one big heat sink, and it's...

The whole thing is one big heat sink, and it's likely used with a 15+ mph or so breeze blowing on it (i.e. you're riding.) It probably wouldn't get excessively hot unless you stopped for a few...
03-04-15, 08:26 PM
Replies: 29
Views: 2,054
Posted By dougmc

8.4 volts is certainly right for a fully charged...

8.4 volts is certainly right for a fully charged 2s battery.

As for plugging in an ammeter ... that would require that somebody actually buy this monstrosity. But 1 amp on high is probably too...
03-04-15, 07:37 PM
Replies: 29
Views: 2,054
Posted By dougmc

Let's look at this another way ... One amp...

Let's look at this another way ...

One amp at 8.4 volts is 8.4 watts. 3000 lumens/8.4 watts = 357 lumens/watt, which is significantly higher than the theoretical limit for a white LED...
02-26-15, 06:48 PM
Replies: 29
Views: 2,054
Posted By dougmc

This light/USB charger is the worst example of...

This light/USB charger is the worst example of lumen inflation I've ever seen (http://www.frys.com/product/8299556) -- they claim 2300 lumens, but the reality is perhaps 10 to 15 lumens.

That...
02-26-15, 10:59 AM
Replies: 29
Views: 2,054
Posted By dougmc

3000 lumens tends to mean around 30 watts, and...

3000 lumens tends to mean around 30 watts, and six 3000 mAh 18650 cells could produce 30 watts for about 2.25 hours. To get four hours out of it, they'd have to reduce the lumens somewhat or be...
02-26-15, 10:21 AM
Replies: 29
Views: 2,054
Posted By dougmc

Moore's laws for lights?

First we had Moore's laws for CPUs, where number of transistors increased exponentially, then it was hypothesized that it might also apply to razor blades (http://www.economist.com/node/5624861) ......
12-19-14, 08:00 AM
Replies: 59
Views: 2,908
Posted By dougmc

The Planet Bike Blaze 2w? It's on the high end...

The Planet Bike Blaze 2w? It's on the high end of "be seen" lights and the low end of "help me see" lights.

I don' t know why you don't trust them, but the quality on this specific light is good...
12-11-14, 05:20 PM
Replies: 64
Views: 4,276
Posted By dougmc

But you told us that you didn't stop. Right? Or...

But you told us that you didn't stop. Right? Or are you going to tell the judge something other than what you told us? (Well, the original poster said he didn't stop, not you.)

And as Coal...
12-11-14, 01:17 PM
Replies: 64
Views: 4,276
Posted By dougmc

While it's true that most people do rolling stops...

While it's true that most people do rolling stops when there's not traffic to yield to ... the law requires a complete stop.

So when you show up to contest the ticket, you can either go "Well,...
12-11-14, 12:56 PM
Replies: 59
Views: 2,908
Posted By dougmc

That must be specific to whatever lights you've...

That must be specific to whatever lights you've got -- in general, flashing modes use the battery up considerably slower than steady on modes, for example this light lasts 5 hours on high, 12 hours...
11-19-14, 04:37 PM
Replies: 64
Views: 4,683
Posted By dougmc

Bail is not required when somebody is sued --...

Bail is not required when somebody is sued -- that's a civil case.

Bail is only for criminal cases, and in general only for the more serious ones -- moving violations may be a criminal matter in...
11-13-14, 02:52 PM
Replies: 22
Views: 1,778
Posted By dougmc

The small difference is largely due to how power...

The small difference is largely due to how power needed to overcome air resistance is proportional to speed cubed, and at speed most power goes into overcoming air resistance. Because of that,...
10-31-14, 09:33 AM
Replies: 896
Views: 266,908
Posted By dougmc

After seeing the $15 one, I ordered another. It...

After seeing the $15 one, I ordered another. It arrived yesterday ... which had it arriving in two weeks.

Things I've ordered from China in the last year or so are getting here more quickly...
10-25-14, 02:06 PM
Replies: 132
Views: 7,164
Posted By dougmc

If you just lose your alternator, sure. If you...

If you just lose your alternator, sure. If you lose your water pump (which you normally do when your car only has one belt) ... most cars will overheat (which tends to mean expensive damage if you...
10-16-14, 11:21 AM
Replies: 896
Views: 266,908
Posted By dougmc

Well, except that the title was "Black Solarstorm...

Well, except that the title was "Black Solarstorm 5000LM 2X CREE XML U2 LED Front Bicycle Bike Headlight Headlamp | eBay...
10-15-14, 11:40 PM
Replies: 132
Views: 7,164
Posted By dougmc

There is an electric motor connected to steering...

There is an electric motor connected to steering system, and so is your steering wheel. If you lose power, you can still steer, though with considerable effort.

However, if the circuit/computer...
10-14-14, 04:01 PM
Replies: 132
Views: 7,164
Posted By dougmc

Don't you already? Your car already has...

Don't you already? Your car already has microprocessors and such that if they failed in the wrong way could end your life. The "runaway throttle" problems that some cars have had have been computer...
10-14-14, 03:12 PM
Replies: 132
Views: 7,164
Posted By dougmc

I do realize that you're attempting to engage in...

I do realize that you're attempting to engage in some clever word play here, but just to be clear, I was using the term "imagine" in the second way here --


Now, it is indeed a forward looking...
10-14-14, 11:31 AM
Replies: 132
Views: 7,164
Posted By dougmc

I imagine that ultimately the self-driving cars...

I imagine that ultimately the self-driving cars will *still* handle that better than a human -- they'll see the car move a tiny amount before it backs up and anticipate that it might back out...
09-26-14, 12:11 PM
Replies: 10
Views: 1,344
Posted By dougmc

Cops usually won't argue with you on *any one*,...

Cops usually won't argue with you on *any one*, not just this one.

That said, sometimes they'll respond favorably to being shown the exact wording of the law -- but I'd expect most of them to get...
09-25-14, 07:02 PM
Replies: 172
Views: 18,416
Posted By dougmc

And here's what happens when the police take a...

And here's what happens when the police take a charge of 'he threw a bottle at me' too seriously (http://www.washingtonpost.com/wp-dyn/content/article/2007/02/17/AR2007021701560.html).
09-22-14, 01:32 PM
Replies: 19
Views: 1,278
Posted By dougmc

That's an odd article. The title suggests...

That's an odd article.

The title suggests that this was an experiment, and that it failed and now it's over and won't be revisited. They don't use the world failed, they just say the experiment...
09-22-14, 01:03 AM
Replies: 182
Views: 7,148
Posted By dougmc

Says who? Where? Maybe they taught you that...

Says who? Where?

Maybe they taught you that in driver's ed, but I don't think any state has that three second thing codified in their actual laws.

Since we're talking about scofflaws...
09-21-14, 01:09 AM
Replies: 145
Views: 7,876
Posted By dougmc

If the DA is looking for this cyclist's GPS...

If the DA is looking for this cyclist's GPS tracks that covered the collision ... that's far from a "fishing trip". If the data exists, it will be extremely relevant to determining if the cyclist...
09-20-14, 10:53 PM
Replies: 145
Views: 7,876
Posted By dougmc

The justice system in general. If you want to...

The justice system in general. If you want to get picky about what needs to happen and in what order and who gets to demand what, fine, but that wasn't my point.

If the DA wants these GPS...
09-20-14, 01:30 PM
Replies: 145
Views: 7,876
Posted By dougmc

... and they set schedules and policies for such...

... and they set schedules and policies for such deletions and stick to them.

That way, when somebody comes looking for the document, they can say "well, we kept it for six months and then deleted...
09-19-14, 03:43 PM
Replies: 145
Views: 7,876
Posted By dougmc

Everybody is slow on this segment, probably...

Everybody is slow on this segment, probably because of all the pedestrians. Looks like there's only about 50 feet of climbing in that mile, so it shouldn't be the hills that are slowing everybody...
09-19-14, 03:38 PM
Replies: 145
Views: 7,876
Posted By dougmc

Legally, there's a huge difference. That...

Legally, there's a huge difference.

That said, brain dead tends to turn into completely dead, and at that point the difference goes away. But if they keep the victim on life support for a long...
09-19-14, 03:28 PM
Replies: 145
Views: 7,876
Posted By dougmc

Ahh, you're right ... that means it's his second...

Ahh, you're right ... that means it's his second best time. Which means nothing without knowing his other times.

Actually, going through that segment (he's on page five), his personal best time...
09-19-14, 02:40 PM
Replies: 145
Views: 7,876
Posted By dougmc

10 mph in a very crowded area is fast. A cyclist...

10 mph in a very crowded area is fast. A cyclist going 25 mph is fast to a pedestrian, but slow to a driver behind them who wants to go faster. "Fast" depends on the situation.

I wasn't trying...
09-19-14, 02:26 PM
Replies: 145
Views: 7,876
Posted By dougmc

"Probation" is a punishment for a crime, not a...

"Probation" is a punishment for a crime, not a traffic infraction.

I mean, I agree with you -- such things are very rarely treated as real crimes unless somebody is drunk or flees the scene, but...
09-19-14, 01:40 PM
Replies: 145
Views: 7,876
Posted By dougmc

We don't even know that, at least not beyond the...

We don't even know that, at least not beyond the true but not helpful "speed is a factor in every collision, because if everybody was standing still there wouldn't have been a collision at all".
...
09-19-14, 11:18 AM
Replies: 145
Views: 7,876
Posted By dougmc

It makes a pretty big difference in the court of...

It makes a pretty big difference in the court of public opinion -- it's just another thing that the cyclist was doing wrong, whatever it is.

That said, if the "wrong lane" just means a car lane,...
09-19-14, 10:20 AM
Replies: 145
Views: 7,876
Posted By dougmc

Wow, that article is awful. And this one I saw...

Wow, that article is awful. And this one I saw on Facebook attached to an anti-cyclist screed is worse (http://nypost.com/2014/09/18/cyclist-slams-into-pedestrian-in-central-park/).

It may have...
09-18-14, 10:11 AM
Replies: 18
Views: 3,056
Posted By dougmc

I'd say buy somewhere between two and eleven of...

I'd say buy somewhere between two and eleven of these (http://www.amazon.com/RioRand-Bicycle-HeadLight-Flashlight-Headlamp/dp/B006QQX3C4/) and use them two at a time. Or buy just two, and some...
09-04-14, 09:27 AM
Replies: 122
Views: 41,584
Posted By dougmc

Hi johnsonzhan. You are idiots.

Hi johnsonzhan.
You are idiots.
Forum: Texas
08-31-14, 11:13 PM
Replies: 0
Views: 801
Posted By dougmc

32nd Annual Austin Moonlight Cruise bike ride, Saturday night, September 7th 1:45am

The 32nd annual Moonlight Cruise bike ride in Austin, TX is coming, this coming Saturday night/Sunday morning, September 7th at 1:45am.

Again, this is Saturday night/Sunday morning -- officially...
08-29-14, 09:29 PM
Replies: 166
Views: 14,501
Posted By dougmc

Maybe, maybe not. Some governments make it...

Maybe, maybe not.

Some governments make it nearly impossible to sue them for anything, no matter the level of incompetence or negligence on their part.

That said, I don't know about *this*...
08-21-14, 11:07 PM
Replies: 73
Views: 7,068
Posted By dougmc

Is that really doable? Is it really practical to...

Is that really doable? Is it really practical to ride on a totally flat tire?

I mean, if the tire were off and it were just the rim them maybe, but with a flat tire I've found the the tire makes...
08-15-14, 09:27 AM
Replies: 99
Views: 4,699
Posted By dougmc

Quite a few people have disputed that. Ken...

Quite a few people have disputed that.

Ken Kifer did, for example (http://www.bellboycott.com/cached/www.kenkifer.com/bikepages/health/risks.htm), writing an entire page where he did some...
08-12-14, 04:46 PM
Replies: 99
Views: 4,699
Posted By dougmc

The reason that most studies look at fatal...

The reason that most studies look at fatal collisions only is that those are the situations that are well documented and reported.

"Mere" injuries are reported far less reliably and consistently....
08-07-14, 11:06 PM
Replies: 32
Views: 2,449
Posted By dougmc

I suspect that this is true, though I also...

I suspect that this is true, though I also suspect that this has less to do with what part of the car hits you/you hit but instead more with the speeds involved.

If you hit a car, your speed is...
07-28-14, 09:04 AM
Replies: 132
Views: 6,249
Posted By dougmc

To be fair, this attitude applies to helmet use...

To be fair, this attitude applies to helmet use as well.

You weren't wearing a helmet? You didn't do anything to prevent injury to yourself, so you're responsible for the collision!

Of course,...
07-28-14, 08:58 AM
Replies: 6
Views: 849
Posted By dougmc

No, they generally work on any Android device. ...

No, they generally work on any Android device.

And there is an iPad version as well, but as I said the iPad version won't work on unhacked iPhones or iPods, even though there's no technical reason...
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