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DGDanforth
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  • Palo Alto, CA
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DGDanforth's Discussions

Tidal Energy News

Started this discussion. Last reply by DGDanforth on Monday. 1 Reply

This discussion considers all aspects of extracting energy from tides.Continue

Oil News

Started this discussion. Last reply by DGDanforth 14 hours ago. 12 Replies

This discussion is about all things related to the oil industrywhich, hopefully, will diminish to a small size.It can't disappear completely since many products are dependent uponplastics, and…Continue

Negative Capacitance

Started Jan 23 0 Replies

From Nature Materials we findContinue

Hyperloop News

Started this discussion. Last reply by Lensman 33 minutes ago. 17 Replies

This discussion concerns all issues related to Elon Musk's Hyperloop project.Continue

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Latest Activity

Lensman replied to DGDanforth's discussion Hyperloop News
"Here are a couple of quotes from the "Hyperloop Alpha" white paper: p. 25 The inner diameter of the tube is optimized to be 7 ft 4 in. (2.23 m) which is small enough to keep material cost low while large enough to provide some…"
33 minutes ago
Yazzur replied to DGDanforth's discussion Hyperloop News
"Yes,  I spend a fair amount of time with the white paper, but I was thinking it might be prudent to work with a 1/2 scale proof of concept.  It would be fairly quick and straight forward (and reasonably cost…"
3 hours ago
Lensman replied to DGDanforth's discussion Hyperloop News
"I see references to water mains 3000 mm (3 meters) in diameter. I'm not sure even that is sufficiently large, but perhaps so. Keep in mind the Hyperloop is designed to have a gap between the outside of the pod and the inside of the tube, to…"
4 hours ago
Lensman replied to DGDanforth's discussion Electric Car News
"Hey, Antiguajohn! I noticed you posted a comment to the Tesla: Gigafactory Tipping Point article on Seeking Alpha. There is another comment there, by the article's author, which is entirely on point to this subject you raised. Many (including…"
12 hours ago
DGDanforth replied to DGDanforth's discussion Graphene News
"A thermionic energy converter using single-layer graphene The findings indicate that a graphene-based cathode thermionic converter operating at 900 K could reach an efficiency of 45%. Based on the novel thermionic emission mechanism, the…"
14 hours ago
Antiguajohn replied to DGDanforth's discussion Electric Car News
"Hi Lensman, I love what Tesla has done, they have delivered a kick in the nuts to the ossified auto industry to wake the lazy bastards up. For too long major auto manufacturers have hewed to incremental improvements, rather than take a chance on…"
14 hours ago
DGDanforth replied to DGDanforth's discussion Oil News
"BNSF oil train derails in rural Illinois; two cars aflame"
14 hours ago
Yazzur replied to DGDanforth's discussion Hyperloop News
"For estimating purposes, if you used steel pipe, you'd likely be around 750 plf, at about $0.75/lb, so say $600/lf for the pipe material only. Any special structure would be on top of that. The would be lots of costs in…"
20 hours ago
Clarity2009 replied to DGDanforth's discussion Tesla News
"I learned a lot about batteries reading that!"
21 hours ago
Clarity2009 replied to DGDanforth's discussion Hyperloop News
"So then the question is, how much does 5 miles worth of 2-meter diameter water main pipe cost?  Seems like that would be a realistic cost floor.  If it's $30 million or less then their stated fundraising goals may be reasonable.…"
21 hours ago
Yazzur replied to DGDanforth's discussion Hyperloop News
"Large diameter watermain (2+ meter dia) work up to 10 bar pressure, 1 bar vacuum, so pressure is not an issue.  Ductile iron, GRP, Steel, HDPE, PVC, RCP all work from a pressure perspective.  It's the beam strength/structural…"
yesterday
Lensman replied to DGDanforth's discussion Electric Car News
"Of course this is just a concept car, but still this is the first time I've ever read of an actual EV powered by lithium-sulfur batteries. I knew various companies (and, I think, university teams) were and are trying to develop practical…"
yesterday
Lensman replied to DGDanforth's discussion Hyperloop News
"For the basic tube, ignoring the expansion joints, there are two requirements: (1) Strong enough to support their own weight plus the weight of any pods traveling thru the Hyperloop (2) Able to withstand 1 atmosphere of pressure (14.7 PSI) with…"
yesterday
Clarity2009 replied to DGDanforth's discussion Hyperloop News
"I wonder if they could use existing material designed for pipelines or something? Those get pretty big and could maintain a low pressure environment, no?"
yesterday
Keith Bidmead replied to DGDanforth's discussion Solar Energy News
"Solar Lease VS Loan  Interesting article from comments about SolarCity showing alternative costs can be less than 50% of SolarCity lease plan. https://vimeo.com/119618512 Kind regards Keith"
yesterday
DGDanforth replied to DGDanforth's discussion Solar Energy News
"Tesla CEO's solar energy venture, 'SolarCity,' bringing jobs to NM "Most of our customers are just the average household. If you look at all the markets that have regrown, it's not the big homes; it's not the…"
yesterday

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DGDanforth's Blog

2012 Mitsubishi i-Miev

Posted on April 12, 2012 at 1:01pm 13 Comments

The i-Miev…

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Nanomachines could benefit from superlubricity

Posted on April 5, 2012 at 7:30pm 0 Comments

This article discusses a form of graphite that has very low friction.

I believe that this should benefit the electric motor industry and increase even more the efficiency of EV cars.

There is the article…

Continue

Researchers produce ‘designer electrons’

Posted on April 3, 2012 at 6:00pm 0 Comments

Scientists from Stanford University and the SLAC National Accelerator Laboratory have developed a …

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Comment Wall (5 comments)

At 2:16am on March 21, 2012, Daniel R Plante said…

Did you name her "Victoria"?

At 3:23am on March 21, 2012, DGDanforth said…

Nope, Jennifer, after a lady I admired in High School.

Good thought though ;o)

At 10:01pm on March 3, 2013, cmarsh777 said…

http://www.earthtechling.com/2013/02/graphene-supercapacitor-battery-thats-not-a-battery/

DGD hi,

These guy's almost have it figured out.  They just do not know how to hook it all together.

I do.  I'm getting ready to cut my own prototype soon.

-cmm

At 2:01am on March 5, 2013, cmarsh777 said…

DGD,

I have applied for a Copyright.  I do not have the where-withal to pursue a patent right now anyway, and the gist of my work is essentially the 2D design. I'm planning to get my prototype cut on an Epilog laser by some friends of mine.  I've been investigating a photo etching process. I have done some small experiments in that vein, but my main worry is precision with the photo etching process.  I lost almost all my work when my computer crashed over a year ago.  Ive now reconstructed most of it.  The last layout took a whole weekend to draw up, and was so complex it locked up CorelDrawX3 three or four times. Each time, I had to go back and start over with my last saved work. The vector graphic is more than 90 megabytes. There are eleven fractal iterations.  It was approaching the physical limits of my printer and computer.

-cmm

At 12:46am on June 1, 2014, cmarsh777 said…

Hi Doug,

Hope all is well with you.

-cmm

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