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Videos uploaded by user “Anders Brownworth”
Blockchain 101 - A Visual Demo
 
17:50
This is a very basic visual introduction to the concepts behind a blockchain. We introduce the idea of an immutable ledger using an interactive web demo. Part 2 is here: https://youtu.be/xIDL_akeras If you are interested in playing with this on your own, it is available online at: http://anders.com/blockchain/ The code that runs this demo is also on GitHub: https://github.com/anders94/blockchain-demo I'm @anders94 on Twitter and @andersbrownworth on Steemit. Donations: BTC: 1K3NvcuZzVTueHW1qhkG2Cm3viRkh2EXJp ETH: 0x84a90e21d9d02e30ddcea56d618aa75ba90331ff ETC: 0xab75ad757c89fa33b92090193a797e6700769ef8
Views: 918575 Anders Brownworth
Blockchain 101 - Part 2 - Public / Private Keys and Signing
 
08:54
This is part two in my basic visual introduction to the concepts behind a blockchain. We build on the concepts from the previous video and introduce public / private key pairs and signing using an interactive web demo. If you missed it, part 1 is here: https://youtu.be/_160oMzblY8 If you are interested in playing with this on your own, it is available online at: http://anders.com/blockchain/public-private-keys/ The code that runs this demo is also on GitHub: https://github.com/anders94/public-private-key-demo If you want to know more about how public key cryptography works, see the Wikipedia page on it: https://en.wikipedia.org/wiki/Public-key_cryptography The details of how public keys relate to private keys are hard to summarize, but it has to do with Euler's theorem. Basically, using Euler's theorem there is some math you can do to a number given some parameters (which I'll call the public key) which allows someone with some other parameters (which I'll call the private key) to decipher the original number without having to do brute force factorization because there is a shortcut way to find the phi of a prime number. Rather than me butchering the explanation, check this video series out for a more detailed explanation: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/the-fundamental-theorem-of-arithmetic-1 I'm @anders94 on Twitter and @andersbrownworth on Steemit. Donations: BTC: 1K3NvcuZzVTueHW1qhkG2Cm3viRkh2EXJp ETH: 0x84a90e21d9d02e30ddcea56d618aa75ba90331ff ETC: 0xab75ad757c89fa33b92090193a797e6700769ef8
Views: 84544 Anders Brownworth
Theodosian Land Walls of Constantinople - Lars Brownworth
 
03:10
Lars walks Theodosian II's land walls of Constantinople.
Views: 18885 Anders Brownworth
Software vs Hardware RAID
 
04:10
Reasons for using software RAID versus a hardware RAID setup.
Views: 22443 Anders Brownworth
Software Radio / OpenBTS - The Well Tempered Hacker Ep 4
 
16:20
We'll take a look at the Ettus Research N210 software programmable radio (or Universal Software Radio Peripheral - USRP) and set up a complete GSM cell "base station" using OpenBTS. We'll also use the same radio to scan a wide frequency range and listen to FM radio using GNURadio. The Ettus Research N210 is available from http://ettus.com/ for roughly $2,700 including the board (WBX) and antenna setup I'm using in this video.
Views: 187037 Anders Brownworth
Top 5 Unexcavated Byzantine Sites
 
03:10
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the top 5 excavated Byzantine sites.
Views: 3346 Anders Brownworth
GSM Module - The Well Tempered Hacker Ep 3
 
09:27
In episode 3 we look at the ADH8066 GSM Module available from SparkFun.com. We'll set it up, make some phone calls and send some text messages with it. You can get one of these with a development board for roughly $100 so it isn't very expensive to start playing around with it. As always, leave comments letting me know what you think.
Views: 112205 Anders Brownworth
Lars Brownworth's Byzantine Book Collection
 
02:37
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", looks at some of the books in his Byzantine collection including a masterful work on the Hagia Sofia.
Views: 1385 Anders Brownworth
What got Lars Brownworth into Byzantine History?
 
01:31
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses what first got him interested in Byzantine history.
Views: 1458 Anders Brownworth
Home Automation with the Raspberry Pi and Node.js - Well Tempered Hacker
 
11:37
The Raspberry Pi at $25 - $35 is cheap enough to be used in every light switch and wall socket of a house as a distributed home automation system. In this episode, we look at using Node.js as the basis for such a system and the hardware necessary to make it happen. This represents the very beginnings of a larger project but I thought I'd make it available in case others are interested in developing the idea. The software used in this project is available for free from GitHub at: https://github.com/anders94/raspberry-pi-home-automation Here's a PDF datasheet on the solid state relays I'm using: http://sharp-world.com/products/device/lineup/data/pdf/datasheet/s116s02_e.pdf
Views: 386723 Anders Brownworth
The Hippodrome of Constantinople
 
02:36
The greatest sports complex in the city of Constantinople was the Hippodrome where chariots would race around and around. Mostly buried today, parts of the immense centerpiece remain visible today.
Views: 11577 Anders Brownworth
Why do we Care about Byzantine History?
 
02:13
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses why we care about Byzantine history.
Views: 1117 Anders Brownworth
Software Radio / Data Tunneling - Well Tempered Hacker
 
15:18
Taking another look at Software Radio, this time with the Ettus Research E100, we create a data tunnel and send a network over it. The E100 includes an entire Linux machine within the device so the need for an external computer is gone. We can simply use the internal Linux machine to route packets and control the radio. Two E100s are shown connecting to each other and granting Internet access to a small WiFi Access Point. We use GNURadio's tunnel.py (from the examples directory) which creates a tunnel device called gr0. Adding an IP and configuring a network to route through it is all that is needed to get this going. E100 hardware is available from http://ettus.com/ for roughly $1,600.00 each. Parts list: E100, RFX900, VERT900
Views: 45380 Anders Brownworth
Part 1 - The Well Tempered Hacker: Supermicro AMD Hardware with Xen Linux Virtual Machines
 
09:21
In this episode we take a look at a dual AMD Supermicro machine with 32 Gigs of RAM and 9 hard drives. We create a RAID5 volume in software with 8 1TB drives and use LVM to slice that into logical volumes for xen virtual machines. We also take a look at the remote management capabilities of the system and see how you would rarely need to be near this machine to manage it!
Views: 18499 Anders Brownworth
Lars Brownworth at the Hagia Sofia
 
07:34
Lars Brownworth takes you on a tour of Justinian's great church, the Hagia Sofia in Constantinople. Be sure to check out Lars' "12 Byzantine Rulers" podcast, especially the three episodes on Justinian at http://12byzantinerulers.com/
Views: 5766 Anders Brownworth
True Random Number Generators - FST-01 - Well Tempered Hacker
 
11:02
Randomness forms the basis of cryptography but computers are deterministic and therefore terrible for generating true randomness. In this episode we'll look at the FST-01, a $35 USB based true random number generator (TRNG) which harvests randomness from the environment. We'll flash the NeuG random number generator software onto the device using a serial programmer and a few wires. Then we'll plug it in, start it up and look at the random data it generates. Hardware: http://www.seeedstudio.com/wiki/FST-01 http://www.seeedstudio.com/depot/s/fst-01.html Software: http://www.gniibe.org/memo/development/gnuk/rng/neug.html #crypto #cryptography #random #randomnumber #geigercounter #cryptography #mouse #pgp #privatekey #flyingstonetiny #FST-01 #randomnumbergenerator #environment #computing #communication #messaging #mail #email
Views: 12713 Anders Brownworth
Raspberry Pi Bitcoin Ticker - Well Tempered Hacker
 
07:14
Add a TFT screen and you open up a world of new uses for the Raspberry Pi. In this episode, we create a Bitcoin Ticker that shows the price of Bitcoin on Bitstamp in real time. The TFT screen used in this video is available from Adafruit for $35. http://www.adafruit.com/products/1601 The code that displays the digits on the frame buffer is available here: https://github.com/anders94/framebuffer-digits
Views: 19831 Anders Brownworth
Anders Brownworth Channel Intro
 
00:58
Channel intro for Anders Brownworth / The Well Tempered Hacker
Views: 4200 Anders Brownworth
Byzantine Influence on Venice
 
03:25
Join Lars Brownworth for a brief tour of Venice where he highlights the Byzantine influences on the city.
Views: 8274 Anders Brownworth
Lars Brownworth - Smithsonian - Part 5 of 8
 
08:54
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the East / West split in Byzantine history in a lecture given December 2, 2009 at the Smithsonian in Washington DC.
Views: 870 Anders Brownworth
Bitcoin M-of-N Multisig Addresses - Well Tempered Hacker
 
20:40
Standard bitcoin transactions involve payment to an address which requires a signature from one private key to spend. With multi-signature addresses, M of N transactions are possible. In this episode we will create a multi-signature address which requires two of three signatures to spend. This could be useful for securing bitcoin in multiple locations reducing the "all or nothing" risk of loosing a private key. One example use of this is in securing some amount of bitcoin offline. You might first generate three private keys and from them generate a 2 of 3 multisig address. At this point, the address is worthless. Then you might print out those private keys and the redeem script onto three separate pieces of paper and destroy any digital copy. Next you might send two of those pieces of paper to two different friends of yours and keep the third in a safe place yourself. Remember, there is no value on the multisig address yet so if they get lost in transit or for some reason you believe the papers didn't make it to their destinations safely, you just start over. With our keys safely in three separate locations, you might transfer some bitcoin to the multisig address, loading up your offline wallet. Some time goes by and you might want to gain access to your bitcoin. You create a spend transaction sending the value to some other online wallet. This transaction isn't valid yet because nobody has signed it so it is safe to send via email to one of your friends. They pull out the piece of paper you sent them, type in the private key adding their signature to the transaction. The transaction is still not yet valid so they email it back to you without worry. You then might decide to add your signature to the transaction making it valid. Again, the transaction would be safe to email because any attempt to change the transaction redirecting it to some other address would invalidate the whole thing. After deciding this is still what you wanted, you might decide to transmit this previously completely offline transaction on the network which would spend the funds away from the multisig address. This is very similar to how many online wallet provider's "vault" features work. However, doing this yourself removes the requirement to trust a possibly disinterested third party. As with anything you do yourself, however, there wouldn't be a third party to blame if you messed things up. (I'm not responsible for any bitcoin you loose trying to get this working!) There are risks in either strategy. The software used in this demo is available here: https://github.com/anders94/bitcoin-2-of-3-multisig
Views: 3993 Anders Brownworth
Part 2 - The Well Tempered Hacker: Supermicro AMD Hardware with Xen Linux Virtual Machines
 
05:48
In this episode we take a look at a dual AMD Supermicro machine with 32 Gigs of RAM and 9 hard drives. We create a RAID5 volume in software with 8 1TB drives and use LVM to slice that into logical volumes for xen virtual machines. We also take a look at the remote management capabilities of the system and see how you would rarely need to be near this machine to manage it!
Views: 5109 Anders Brownworth
Recording the "Lost to the West" Audiobook
 
01:25
Lars Brownworth during the recording session of his book "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization". (apologies, I recorded this on my iPhone so the quality isn't ideal)
Views: 682 Anders Brownworth
Cambridge River Run - by MIT and Boston
 
04:28
A hyperlapse of a run around the Charles River in Cambridge and Boston, MA. You can see The Massachusetts Institute of Technology, several boat houses, Sorrow Drive in Boston, the Hatch Shell and Boston's Museum of Science. This is one of my standard runs through Cambridge and Boston. The great thing about this run is once you are at the river, you only have to cross 2 streets for a 12K run. This video was made with a GoPro, smoothed out and sped up to 16 time speed using Hyperlapse.
Views: 901 Anders Brownworth
Lars Brownworth - (Pt. 1) Byzantium Lecture at the Helenic Society Prometheas
 
09:50
Lars Brownworth discusses the importance of Byzantine History at the Helenic Society Prometheas on November 5, 2010. For far too many otherwise historically savvy people today, the story of the Byzantine civilization is something of a void. Yet for more than a millennium, Byzantium reigned as the glittering seat of Christian civilization. When Europe fell into the Dark Ages, Byzantium held fast against Muslim expansion, keeping Christianity alive. When literacy all but vanished in the West, Byzantium made primary education available to both sexes. Streams of wealth flowed into Constantinople, making possible unprecedented wonders of art and architecture. It was Byzantium that preserved for us today the great gifts of the classical world. And it was the Byzantine Empire that shielded Western Europe from invasion until it was ready to take its own place at the center of the world stage. Filled with unforgettable stories of emperors, generals, and religious patriarchs, as well as fascinating glimpses into the life of the ordinary citizen, Lost to the West reveals how much we owe to this empire that was the equal of any in it s achievements.
Views: 1984 Anders Brownworth
Byzantium and the Renaissance
 
00:52
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the Byzantine's gift to the Renaissance.
Views: 844 Anders Brownworth
Top 5 Good Laws of the Byzantine Empire
 
01:10
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the top 5 good laws from the Byzantine empire that we wish we still had.
Views: 2008 Anders Brownworth
Share a Dynamically Updatable Location with Anyone
 
01:35
http://eyezo.com/ gives you a short URL for any location on Earth. In this quick tutorial, I should you how to share a location and update it in realtime with EyeZo.com!
Views: 761 Anders Brownworth
Episode 2 - Part 3 - The Well Tempered Hacker
 
05:12
In this episode we look at another Xen setup using software RAID and LVM. This time we don't have a spare drive for booting and instead use a partition of the disk. Ideally we don't use a partition either but our boot loader "grub" isn't able to access LVM on top of software RAID in it's current version. (the new version can do this) When grub 2 officially comes out, we will revisit this.
Views: 835 Anders Brownworth
Lars Brownworth - Smithsonian Lecture - Byzantium: Rome's Lost Empire
 
01:10:14
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization" discusses the East / West split in Byzantine history in a lecture given December 2, 2009 at the Smithsonian in Washington DC.
Views: 9326 Anders Brownworth
Lars Brownworth - Smithsonian - Part 2 of 8
 
09:39
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization" discusses the East / West split in Byzantine history in a lecture given December 2, 2009 at the Smithsonian in Washington DC.
Views: 1478 Anders Brownworth
Why The Scrolling Direction Reversal in Mac OS X Lion Makes Sense
 
04:20
Apple reversed the scroll direction of input devices like the mouse wheel and touch pad two-finger gesture in Mac OS X Lion. Although annoying to have to re-learn, I argue that this was the right thing to do.
Views: 1017 Anders Brownworth
Lost to the West Teaser
 
00:48
Lars Brownworth's book "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization" is available in bookstores and on Amazon.com.
Views: 1643 Anders Brownworth
Top 5 Bad Laws of the Byzantine Empire
 
01:23
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the top 5 bad laws of the Byzantine empire that we are happy to leave on the ash heap of history!
Views: 2286 Anders Brownworth
Were Byzantines Roman or Greek? - Lars Brownworth
 
02:27
Edward Gibbon refers to the Byzantines as Greeks but the Empire is made up of a commonwealth of people. Do they all speak Greek and do they all see themselves as Greek?
Views: 5542 Anders Brownworth
Lars Brownworth - Smithsonian - Part 4 of 8
 
09:51
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the East / West split in Byzantine history in a lecture given December 2, 2009 at the Smithsonian in Washington DC.
Views: 886 Anders Brownworth
Run: South Boston - July 4th
 
10:56
A run from Kendall Square, Cambridge into Downtown Boston and then through South Boston (Southie) including Castle Island, Pleasure Bay and then right across the middle of the city ending up back in Kendall Square, Cambridge. The distance is slightly over 20k (12.5 miles) and took just over 2 hours. I ran this the morning of July 4th and the end of it is around the Charles River where the big July 4th firework display was being set up. You can see the barges and a few people already lined up in chairs at 9:00am! Here's a link to a map of the run: https://runkeeper.com/user/Anders94/activity/819204773
Views: 581 Anders Brownworth
Pure Google Android on a Sprint LS670
 
01:52
This is a work in progress creating a pure Google Android ROM for the Sprint LS670. I have been able to get a kernel and Android Froyo compiled "from scratch" and running on the hardware. I'm currently in the process of getting all the drivers for the various radios and sensors up and running.
Views: 11268 Anders Brownworth
Founding of Constantinople - Lars Brownworth
 
00:34
The story of how Constantine picked Byzantium for his new capital to mirror Rome.
Views: 2896 Anders Brownworth
Lars Brownworth - (Pt. 2) Byzantium Lecture at the Helenic Society Prometheas
 
10:02
Lars Brownworth discusses the importance of Byzantine History at the Helenic Society Prometheas on November 5, 2010. For far too many otherwise historically savvy people today, the story of the Byzantine civilization is something of a void. Yet for more than a millennium, Byzantium reigned as the glittering seat of Christian civilization. When Europe fell into the Dark Ages, Byzantium held fast against Muslim expansion, keeping Christianity alive. When literacy all but vanished in the West, Byzantium made primary education available to both sexes. Streams of wealth flowed into Constantinople, making possible unprecedented wonders of art and architecture. It was Byzantium that preserved for us today the great gifts of the classical world. And it was the Byzantine Empire that shielded Western Europe from invasion until it was ready to take its own place at the center of the world stage. Filled with unforgettable stories of emperors, generals, and religious patriarchs, as well as fascinating glimpses into the life of the ordinary citizen, Lost to the West reveals how much we owe to this empire that was the equal of any in it s achievements.
Views: 525 Anders Brownworth
The Galada Tower
 
00:44
Lars Brownworth looks at the Galada Tower's pivotal role in the history of Constantinople and the Byzantine Empire at large.
Views: 2029 Anders Brownworth
What is the Byzantine Empire?
 
00:42
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses what the Byzantine Empire is and where it fits in history.
Views: 3643 Anders Brownworth
Sharing your Location with EyeZo.com
 
00:47
http://eyezo.com/ gives you a short URL for any location on Earth. In this quick tutorial, I should you how to share your location with a short URL!
Views: 322 Anders Brownworth
Downtown New York
 
00:58
View from a helicopter flight around downtown New York
Views: 17219 Anders Brownworth
Spiderman 3 on location in NYC
 
00:40
Spiderman 3 being filmed in Manhattan
Views: 124270 Anders Brownworth
Save The Net!
 
00:33
Laws governing the future of the Internet are being made right now. Without your input, the Web of the future could be less accessible than it is today. See http://www.savethenet.com/ for more information on Net Neutrality.
Views: 3729 Anders Brownworth
Studion Monastery - Lars Brownworth
 
00:25
The Monastery of St. John of Stoudios - one of the most important monasteries in Constantinople until the fall of the city.
Views: 1697 Anders Brownworth
Raster vs Vector Formats
 
00:30
A demonstration of the lack of pixelation advantage a vector image like an Adobe Illustrator (.ai) file or EPS file has over a raster image such as JPEG or TIFF.
Views: 1670 Anders Brownworth
Lars Brownworth - Smithsonian - Part 3 of 8
 
09:48
Lars Brownworth, author of "Lost to the West: The Forgotten Byzantine Empire that Rescued Western Civilization", discusses the East / West split in Byzantine history in a lecture given December 2, 2009 at the Smithsonian in Washington DC.
Views: 1108 Anders Brownworth
Roller Coaster: Thunder Road
 
01:51
A ride on Carowind's Thunder Road Roller Coaster
Views: 22862 Anders Brownworth

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