File:Tunnel of love (32489303638).jpg
Original file (5,472 × 3,648 pixels, file size: 3.68 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionTunnel of love (32489303638).jpg |
A key insight of the new rigs for digging tunnels, geothermal heat exchangers and deep-sea oil-well-drilling robots is the dramatic cost reduction obtained by a smaller tunnel. If you imagine a tunnel that will only allow for EVs (vehicles or sleds), you don't have to deal with the massive air-handling pipes to evacuate toxic diesel exhausts. At the limit, I wonder if CO2 scrubbers, as used in <a href="https://www.flickr.com/photos/jurvetson/6300700751/in/photolist-28oKQve-MCYPMo-YBjuYY-aALJPz-5tk6C-Y6V1co-BWtEHS-XYQ4Er-Z15cFc-Z15cA2-XYQ4z6-YBjv4Y-XYQ4uX">submarines and spacecraft</a>, could locally purify like a scuba rebreather. "The current standard for a one-lane tunnel is approximately 28 feet. By placing vehicles on a stabilized electric skate, the diameter can be reduced to less than 14 feet. Reducing the diameter in half reduces tunneling costs by 3-4 times." — Boring <a rel="noreferrer nofollow">FAQ</a> |
Date | Taken on 13 December 2018, 16:31 |
Source | tunnel of love |
Author | Steve Jurvetson from Menlo Park, USA |
Licensing
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/32489303638. It was reviewed on 24 December 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
24 December 2018
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current | 02:22, 24 December 2018 | 5,472 × 3,648 (3.68 MB) | BugWarp (talk | contribs) | Transferred from Flickr via #flickr2commons |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | SONY |
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Camera model | DSC-RX100M3 |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/1.8 |
ISO speed rating | 250 |
Date and time of data generation | 16:31, 13 December 2018 |
Lens focal length | 8.8 mm |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | DSC-RX100M3 v1.20 |
File change date and time | 16:31, 13 December 2018 |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 16:31, 13 December 2018 |
Meaning of each component |
|
Image compression mode | 2 |
APEX brightness | 0.73203125 |
APEX exposure bias | 0 |
Maximum land aperture | 1.6953125 APEX (f/1.8) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 24 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
IIM version | 2 |