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Comment: Re:Good. IndieGoGo should do it too (Score 2) 178

by Jeremy Erwin (#47964389) Attached to: Kickstarter Lays Down New Rules For When a Project Fails

A good road should last for tens of centuries. The Romans understood that, and engineered their roads accordingly. To blithely dismiss their roadbuilding expertise as consisting of "flat rocks" ignores the engineering underneath the road, described here. Or if you have kids, David Macauley's City may still hold up after nearly forty years.
  American roads rarely last more than a few decades, unless consistently and constantly maintained. But they are comparatively cheap. I hear that European approaches tend to produce a more durable road, at greater expense.

That said, the solar roadway may not turn out to be a very good road by this metric, despite the added construction expense.

Comment: Re:Parallax. (Score 1) 424

by Jeremy Erwin (#47924017) Attached to: Apple Edits iPhone 6's Protruding Camera Out of Official Photos

Yep. I recently acquired a inexpensive macro zoom lens. At 1:2-- yes, yes, it's not true macro-- I have to hold the camera very close-- a few centimetres-- to whatever I'm trying to focus on. At the faster f-stops, the depth of field is wafer thin-- a good photographer with a fast macro can make that lens "bulge" disappear. Most macro technique involves stopping down the aperture (and consequently needing to use some sort of flash) and focus stacking to get as much depth of field as possible-- neglecting to do so for artistic reasons is quite doable.

Comment: Re:Overkill much... (Score 1) 210

by Jeremy Erwin (#47897449) Attached to: SanDisk Releases 512GB SD Card

Nope-- they would drop frames. The write speed is not sufficient for raw 4k video. It's good for about 1.5 hours of video, perhaps even more since 95MB/sec is the read speed, and not the (almost certainly) slightly slower write speed, and of course, it's unlikely that the camera will produce data at this exact speed.

The blackmagic cameras are typically used with SSDs. even though some SanDisk extreme Pro SDCards support 280 MB/s reads. This 512 GB card is hogtied by its slow speed, even though 95 MB/s would ordinarily be regarded as pretty speedy.

Comment: Re:12 buses, at $million each . Fare: $150 (Score 2) 488

by Jeremy Erwin (#47868901) Attached to: To Really Cut Emissions, We Need Electric Buses, Not Just Electric Cars

The range is 30 miles. Periodically, the busses will fully recharge in seven and half minutes.

StarMetro in Tallahassee, which has a fleet of 72 diesel buses, found itself coping with budget problems when the price of diesel spiked in 2007. Fuel is typically the second-highest cost for a transit system, behind labor. StarMetro was Proterra’s third customer, ordering three buses in 2010 and two more in 2011, backed by federal funds. “We put them on our most visible route,” said Ralph Wilder, superintendent of transit maintenance. The buses can easily handle the 18-mile loop, which runs from Tallahassee Community College to the Governor’s Square Mall. On this route, all buses stop for 10 minutes in the middle, to wait for connections, so charging up the electric ones doesn’t add any time to the trips. Recharging takes about 7.5 minutes.

So, $825,000 for the electric bus, but only $80,000 in fuel costs over 12 years, vs $447,000 for a diesel bus with $500,000 in fuel costs. In theory, economical, but there are also air quality improvements-- depending on how the electricity is sourced.

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