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Danny Thorpe
Works at Opex.io
Attended LSU
Lives in Ben Lomond, CA
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Danny Thorpe

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Interesting research paper reviewing multiple studies of contaminants in rooftop collected rainwater.  Notice that rainwater collected before contact with the roof surface already has non-trivial amounts of some metals!  

The paper also makes a valid point that while EPA standards specify recommended concentration limits for some metals such as Aluminum and Zinc, these are secondary standards affecting water taste or clarity, not actual health hazards.

My conclusion: If you plan to use rainwater harvesting as a source of potable drinking water, you should plan on installing a water filtration and disinfection system just as you would for any other surface water capture system. Dissolved zinc in water collected from a galvanized metal roof system is not toxic to humans, but can affect water taste, and can be significantly knocked down by normal water filtration processes.  

Note that since zinc is an antibacterial/antifungal agent, an aquaponic system using captured rainwater will have much lower tolerance for dissolved zinc than EPA standards for human drinking water. With sufficient water treatment (ozonation + filtration, perhaps), rainwater can be used for aquaponics and for potable water systems. As with any water source, it's just a matter of how much effort you want to put into it. 
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Cute, jeroen
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Airbus unveils hypersonic aircraft design concept to travel Paris - New York in 1 hour. 3500 mph, mach 5 at 115,000 ft
 
iDigitalTimes: Airbus Hypersonic Jet Flies London To New York In 1 Hr: See How Hyperjet Reaches Mach 5 [VIDEO] http://google.com/newsstand/s/CBIw7_yCoCM
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Plus 2 hours wait for immigration plus 3 hours present before departure for safety. So it saves like just 50 percent of total time. 
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If you noticed bitcoin testnet went a little nuts over the weekend, here's the back story.

TL;DR:  Testnet is a crucible that mimics the bitcoin main network, but with greater opportunity for extremes (and deliberately so). Testnet is supposed to be a little chaotic so that bitcoin services can be tested under difficult or hostile conditions that are rare on the normal bitcoin block chain, to ensure that the services don't fall over at the first sign of turbulence in the bitcoin main network.

Yes, testnet's forkfest / orphan block storm is much more extreme than we should ever see in the bitcoin blockchain, but testnet uses exactly the same block fork / orphan protocol as the main bitcoin blockchain so any service that can properly handle these occasional testnet forkfests will be rock solid for the relatively tame main blockchain.
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The block storms on testnet have popped up again a few times since the writing of this post. Testnet3's "block height" used to lag well behind the main bitcoin blockchain. Now testnet3 has surged so far ahead in number of blocks, it has passed the next block reward boundary. Testnet now issues 12.5 TBTC per block mined, while the main blockchain is still chugging away at 25 BTC per block (block rewards are prescribed by consensus rules to decrease over time). Mainnet will probably not cross that boundary until well into 2016.
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507 mechanical movements - animated.

http://507movements.com/mm_038.html
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Finally got around to installing a wiring box to shelter a router/switch in the garage/workshop last weekend. 

The garage/workshop is a drafty old barn with no hope of ever keeping rodents from the surrounding forest out, so protecting the electronics from rodent "debris" and workshop dust is a big deal. 

An old Linksys router is serving as a temp switch until I can get a Netgear PoE switch in there. With a PoE switch in there, I can power the Ubiquiti UniFi wifi AP with just the Ethernet cable and remove one of the power bricks on the ledge.

The ethernet jack to the right of the wifi AP is the terminus of the cable run to the house which makes use of a spare conduit that somebody laid when burying the power conduit from the house to the garage decades ago. Thank you for the spare conduit, and thank you thank you for leaving a pull string in it!

Now to run Cat6 from this box to the workshop PC, and think about installing a data logger on the kiln controller.

p.s. Yes the framing you see in the photo is redwood, as is the rest of the garage. Very likely harvested and milled on-site when this barn and house were constructed 60 or 70 years ago.
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+Jeroen Wiert Pluimers It is fiberglass, but I do have a really good grounding shoe.
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BREAKING: Computer Giant Dell Now Accepts Bitcoin http://coinde.sk/1nF2goh
Founder Michael Dell has announced via twitter that the multinational computer technology company Dell is now accepting bitcoin.
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And I was wondering when you are going to announce what business you're in, Danny!
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Danny Thorpe

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Note to self: never install network equipment on the western wall of an non-airconditioned non-insulated workshop.  Network failures from 1pm to 5pm every day for the past week.
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+Danny Thorpe I've contemplated to put some of the network equipment under the garage. Cooler, but no airflow whatsoever. One day I just might (:
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Well not exactly 3D printing but interesting nonetheless 
Waterjet cutters are generally huge machines, with equally large price tags. But what if there was a hobbyist level waterjet cutter that was actually affordable? Well, for their Senior Design Project at the University of Pennsylvania, Adam Libert and his team made one that could retail for less than $5000: "I was the lead mechanical designer on this project and custom designed a fully waterproof and environmentally sealed XY gantry that would be ...
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The Adventures of an Expedition Photographer

Many a story has been told imagining places never before seen by human eyes or of cultures barely known to the outside world. Gordon Wiltsie tells such stories, but with one difference: Gordon's stories aren't fiction. He was there. These places, these peoples really exist. Gordon Wiltsie has made a career of finding such places and vanishing cultures and documenting them with stunning, other-worldly photography and insightful prose.

A UCSC graduate with honors in photography and writing, Gordon's passion for pursuing some of the most inaccessible places on earth began while he was still a student. Traveling and adventuring on weekends and between semesters, writing and developing film (remember film?) between classes, his articles and photographs were soon published in national magazines. 

Although his career didn't launch itself overnight, he eventually became one of the most respected expedition photographers of his generation. He has worked assignments for National Geographic, Outside and other worldwide publications, including such widely varied projects as climbing Himalayan summits, extreme skiing and big wall climbing in Antarctica, dog sledding across the Arctic Ocean, riding reindeer sleds with the last nomadic clans in Arctic Russia, and galloping across Asian steppes alongside the descendants of Genghis Khan (while trying desperately not to fall off his horse!). 

Few photographers have undertaken a more varied, dangerous and captivating collection of adventures as Gordon Wiltsie. Join us for an evening of breathtaking imagery and light-hearted storytelling  as Gordon shares a few of his most memorable adventures with us.


Presented by The Quail & Thistle Tea Room in Capitola. (http://quailandthistle.com)
General Admission tickets are $20 in advance, $25 at the door.
Student tickets are $15 in advance, $20 at the door. (Valid student photo ID required at the door)
Gordon Wiltsie: To the Ends of the Earth
Fri, October 24, 2014, 7:00 PM PDT
Rio Theater

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Have him in circles
649 people
Ralf Kaiser's profile photo
Mohammad saad's profile photo
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Johan Gunnarsson's profile photo
Daniel Pérez's profile photo
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Holger Flick's profile photo
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Work
Occupation
Software Architect
Employment
  • Opex.io
    Founder & CTO, 2014 - present
    Creating next generation financial services built on the Bitcoin blockchain.
  • Quest Software
    Software Architect, 2011 - 2014
  • Dell
    Principal Engineer, 2012 - 2014
  • BiTKOO
    Chief Software Architect, 2010 - 2011
  • Microsoft
    Principal Engineer, Windows Azure Tools, 2008 - 2010
  • Borland
    1990 - 2005
  • Google
    2005 - 2006
  • Cooliris
    2007 - 2008
  • Microsoft
    Principal Engineer, Windows Live, 2006 - 2007
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Ben Lomond, CA
Previously
Baton Rouge, LA - Santa Cruz, CA - Ponte Vedra, FL - Scotts Valley, CA
Story
Introduction
Software architect, hobby farmer, home brewer, ceramicist, wordsmith, 3D printanista,  garage alchemist
Bragging rights
Delphi compiler architect @Borland, co-founder Google Gears @Google
Education
  • LSU
    BS Mathematics, 1986 - 1990
Basic Information
Gender
Male
Relationship
Married
Apps with Google+ Sign-in
  • Galaxy on Fire 2™ HD
A classic burger joint, really nice people
Food: Very GoodDecor: GoodService: Excellent
Public - 2 years ago
reviewed 2 years ago
Tourist trap. Outragous prices
Public - 4 years ago
reviewed 4 years ago
3 reviews
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Map
Map
Public - 4 years ago
reviewed 4 years ago