A Complete Beginners Guide to Blockchain Technology Part 4 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 5 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 6 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 3 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 2 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
This slidedeck was used at the second Blockchain Vlaanderen meetup in Antwerp. It was given as a general introduction into Blockchain to enable newcomers to follow the presentations that followed.
Intro to Blockchain - And, by the way, what the heck is proof-of-work?Jim Flynn
An overview of bitcoin and the blockchain with a more in-depth description of proof of work (POW). Conde samples used to demonstrate the concepts behind POW are available at http://jamespflynn.com.
A Complete Beginners Guide to Blockchain Technology Part 5 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 6 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 3 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
A Complete Beginners Guide to Blockchain Technology Part 2 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
This slidedeck was used at the second Blockchain Vlaanderen meetup in Antwerp. It was given as a general introduction into Blockchain to enable newcomers to follow the presentations that followed.
Intro to Blockchain - And, by the way, what the heck is proof-of-work?Jim Flynn
An overview of bitcoin and the blockchain with a more in-depth description of proof of work (POW). Conde samples used to demonstrate the concepts behind POW are available at http://jamespflynn.com.
Metadata in the Blockchain: The OP_RETURN ExplosionCoin Sciences Ltd
With the addition of OP_RETURN outputs in version 0.9, it became possible to attach arbitrary pieces of information to bitcoin transactions. This turns bitcoin into a low-level communications protocol, just like TCP/IP, on which many new applications can be built.
Despite its powerful features, bitcoin is also limited, costly and inefficient compared to TCP/IP. After discussing which sorts of applications make this trade-off worthwhile, we talk about CoinSpark, a new open source protocol for enhancing bitcoin transactions, which makes extensive use of OP_RETURNs.
Talk for CodeMash 2018. Page to end for resources. Some more links (click to expand):
Bitcoin's Insane Energy Consumption Explained: https://arstechnica.com/tech-policy/2017/12/bitcoins-insane-energy-consumption-explained/
The Ethereum-blockchain size will not exceed 1TB anytime soon.
https://dev.to/5chdn/the-ethereum-blockchain-size-will-not-exceed-1tb-anytime-soon-58a
For use rights, please see license agreement below.
Introduction to blockchain and cryptocurrency technologiesPaweł Wacławczyk
Introduction to cryptography primitives and fundamental data structures. Discuss the process of achieving distributed consensus, proof-of-work and potential attacks on network.
I am sending you 1π! Pi is a new digital currency developed by Stanford PhDs, with over 9 million members worldwide. To claim your Pi, follow this link https://minepi.com/krishvikram and use my username (krishvikram) as your invitation code.
Step 1. Install the Pi app with above link
Step 2 verify the profile
Step 3 tap on earnings and share your link and increase your earnings
Step 4 verification type the referral code which is mandatory.
Referral code is : krishvikram
Presentation of sidechains as Blockstream currently defines them (December 2014).
LaTeX sources : https://www.dropbox.com/sh/yoz9mmfsom6b4yx/AAD1FK6xhFuyohbxdanXOEz0a?dl=0
Virtual or digital currencies, with Bitcoin chief amongst them, have been gaining momentum and investment over the last couple of years. Offering an almost costless means of making payments around the globe, virtual currencies have the potential to bring significant disruption to the banking industry. This potential is not lost on either Bitcoin startups or banks themselves. But how does Bitcoin actually work? A peer-to-peer network maintains the “blockchain”, an innovative cryptographic protocol which securely mediates payments between parties without mutual trust. This session will step through the structure of the blockchain, showing how it solves the “double spend” problem and allows decentralised processing of financial transactions. Whether Bitcoin will become the currency of the internet or it’s a bubble that is doomed to burst sooner or later, the blockchain itself will change the face of transactional banking and perhaps other industries along the way.
Presentation to the Sydney Financial Mathematics Workshop (11 March 2015)
http://www.qgroup.org.au/content/bitcoin-banking-and-blockchain
CBGTBT - Part 1 - Workshop introduction & primerBlockstrap.com
A Complete Beginners Guide to Blockchain Technology Part 1 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
Metadata in the Blockchain: The OP_RETURN ExplosionCoin Sciences Ltd
With the addition of OP_RETURN outputs in version 0.9, it became possible to attach arbitrary pieces of information to bitcoin transactions. This turns bitcoin into a low-level communications protocol, just like TCP/IP, on which many new applications can be built.
Despite its powerful features, bitcoin is also limited, costly and inefficient compared to TCP/IP. After discussing which sorts of applications make this trade-off worthwhile, we talk about CoinSpark, a new open source protocol for enhancing bitcoin transactions, which makes extensive use of OP_RETURNs.
Talk for CodeMash 2018. Page to end for resources. Some more links (click to expand):
Bitcoin's Insane Energy Consumption Explained: https://arstechnica.com/tech-policy/2017/12/bitcoins-insane-energy-consumption-explained/
The Ethereum-blockchain size will not exceed 1TB anytime soon.
https://dev.to/5chdn/the-ethereum-blockchain-size-will-not-exceed-1tb-anytime-soon-58a
For use rights, please see license agreement below.
Introduction to blockchain and cryptocurrency technologiesPaweł Wacławczyk
Introduction to cryptography primitives and fundamental data structures. Discuss the process of achieving distributed consensus, proof-of-work and potential attacks on network.
I am sending you 1π! Pi is a new digital currency developed by Stanford PhDs, with over 9 million members worldwide. To claim your Pi, follow this link https://minepi.com/krishvikram and use my username (krishvikram) as your invitation code.
Step 1. Install the Pi app with above link
Step 2 verify the profile
Step 3 tap on earnings and share your link and increase your earnings
Step 4 verification type the referral code which is mandatory.
Referral code is : krishvikram
Presentation of sidechains as Blockstream currently defines them (December 2014).
LaTeX sources : https://www.dropbox.com/sh/yoz9mmfsom6b4yx/AAD1FK6xhFuyohbxdanXOEz0a?dl=0
Virtual or digital currencies, with Bitcoin chief amongst them, have been gaining momentum and investment over the last couple of years. Offering an almost costless means of making payments around the globe, virtual currencies have the potential to bring significant disruption to the banking industry. This potential is not lost on either Bitcoin startups or banks themselves. But how does Bitcoin actually work? A peer-to-peer network maintains the “blockchain”, an innovative cryptographic protocol which securely mediates payments between parties without mutual trust. This session will step through the structure of the blockchain, showing how it solves the “double spend” problem and allows decentralised processing of financial transactions. Whether Bitcoin will become the currency of the internet or it’s a bubble that is doomed to burst sooner or later, the blockchain itself will change the face of transactional banking and perhaps other industries along the way.
Presentation to the Sydney Financial Mathematics Workshop (11 March 2015)
http://www.qgroup.org.au/content/bitcoin-banking-and-blockchain
CBGTBT - Part 1 - Workshop introduction & primerBlockstrap.com
A Complete Beginners Guide to Blockchain Technology Part 1 of 6. Slides from the #StartingBlock2015 tour by @blockstrap
Part 1: http://www.slideshare.net/Blockstrap/cbgtbt-part-1-workshop-introduction-primer
Part 2: http://www.slideshare.net/Blockstrap/02-blockchains-101
Part 3: http://www.slideshare.net/Blockstrap/03-transactions-101
Part 4: http://www.slideshare.net/Blockstrap/cbgtbt-part-4-mining
Part 5: http://www.slideshare.net/Blockstrap/05-blockchains-102
Part 6: http://www.slideshare.net/Blockstrap/06-transactions-102
If the events of June haven’t scared you off, there’s still time to run with the herd and start mining ether.
In this talk I’m going to run through the practical considerations of getting up & running with your own mining rig, including:
Hardware
Software
Profit
What is Bitcoin, why it succeed?
How it works?
How developers could integrate Bitcoin payment to their systems
The video in the slides is available at : https://www.youtube.com/watch?v=W0qn3oPYo5c
There are new and emerging opportunities for organisations in all sectors to create and deliver compelling services for their customers using the power of disruptive innovation. As organisations formulate their plans for the coming months, this paper aims to help business and public sector leaders understand the cultural and organisational challenges that are inevitably brought by the use of blockchain technologies, and provides them with the insights they need to overcome them.
Blockchain: the technologies behind Bitcoin, Ethereum, ICO, and moreAaron Li
Beginner level lecture for blockchain. Topics covered: the history and technologies behind Bitcoin, trading, ICO, applications, job opportunities, and more. These are the slides accompanying my online live lecture at BitTiger (Nov 15, 2017).
Video (Chinese): https://www.youtube.com/watch?v=lVVCu_Pxshk
Event page: https://www.bittiger.io/events/2SS4xnfKzKYvwBpPQ
Atmosphere Conference 2015: Need for Async: In pursuit of scalable internet-s...PROIDEA
Speaker: Konrad Malawski
Language: English
It's the year 2015, so unless you've been living under a rock for the last decade, you probably have heard about servers and platforms needing to go asynchronous in order to scale. But really, how deep did you dive into the reasons as why this need arrises? This talk aims to explain the various reasons and techniques that can be (and often are) used in developing high performance web applications - from the kernel depths, to the high level abstractions that all contribute to such designs.
We'll start with the lowest level of them all - the network transports we all use and how they impact latency in our systems.
Then we will move on to operating systems' socket selector implementation details and the now legendary C10K problem, to see how implementations were forced to change in order to survive the ever-rising number of concurrent connections. Next we'll dive into processor and thread utilisation effects and how parallel programming - using either message-passing or stream processing style libraries fits into the grand picture of pursuing the most stable and lowest latency characteristics we could dream of.
Visit our website: http://atmosphere-conference.com/
A New Age of JVM Garbage Collectors (Clojure Conj 2019)Alexander Yakushev
Some programmers might think that garbage collection is a solved problem. It runs with the VM and takes care of your unused objects – what else would you want? However, the recent spike of interest in new garbage collectors for JVM (Shenandoah, ZGC) and beyond (Go GC) shows that there are still possibilities for improvement. In this talk, we will briefly walk through the history of memory management and discover what the modern GCs can do for you.
A Quick Start To Blockchain by Seval CaprazSeval Çapraz
Blockchain is one of the most innovative discoveries of the past century.
The first cryptocurrency, Bitcoin, was proposed in 2008 by Satoshi Nakamoto with a white paper.
Tokyo APAC Groundbreakers tour - The Complete Java DeveloperConnor McDonald
A look at the techniques that middle tier developers can employ to get greater value out of their applications, simply by having an understanding of how the database works and how to make it sing.
Presentation by Stefan Dziembowski, associate professor and leader of Cryptology and Data Security Group University of Warsaw. In BIU workshop on Bitcoin. Covered exclusively by vpnMentor.com
Abstract:
Cassandra is a new kind of database: it is more than a single-machine system. It naturally runs in a High-Availability configuration. All nodes in the system are symmetric; there is no single point of failure. As you add machines, failure becomes routine, and Cassandra is built to tolerate that with no interruptions.
Cassandra is linearly scalable with good performance characteristics for very small and very large data stores. Unlike earlier efforts, Cassandra is more than just a key-value store; it is a structured data store which can facilitate complex use cases and queries. Cassandra allows for random access to your data organized into rows and columns.
Cassandra is different, and exciting. This presentation will discuss the pros and cons of using Cassandra, and why it has seen such amazing adoption in the past year.
Bio:
Ben Coverston is Director of Operations at DataStax (formerly knows as Riptano), a provider of software, support, services, training, resources and help for Cassandra. He has been involved in enterprise software his entire career. Working in the airline industry, he helped to build some of the highest volume online booking sites in the world. He saw first hand the consequences of trying to solve real world scalability problems at the limit of what traditional relational databases are capable of.
Most mid-sized Django websites thrive by relying on memcached. Though what happens when basic memcached is not enough? And how can one identify when the caching architecture is becoming a bottleneck? We'll cover the problems we've encountered and solutions we've put in place.
This 7-second Brain Wave Ritual Attracts Money To You.!nirahealhty
Discover the power of a simple 7-second brain wave ritual that can attract wealth and abundance into your life. By tapping into specific brain frequencies, this technique helps you manifest financial success effortlessly. Ready to transform your financial future? Try this powerful ritual and start attracting money today!
ER(Entity Relationship) Diagram for online shopping - TAEHimani415946
https://bit.ly/3KACoyV
The ER diagram for the project is the foundation for the building of the database of the project. The properties, datatypes, and attributes are defined by the ER diagram.
Multi-cluster Kubernetes Networking- Patterns, Projects and GuidelinesSanjeev Rampal
Talk presented at Kubernetes Community Day, New York, May 2024.
Technical summary of Multi-Cluster Kubernetes Networking architectures with focus on 4 key topics.
1) Key patterns for Multi-cluster architectures
2) Architectural comparison of several OSS/ CNCF projects to address these patterns
3) Evolution trends for the APIs of these projects
4) Some design recommendations & guidelines for adopting/ deploying these solutions.
1.Wireless Communication System_Wireless communication is a broad term that i...JeyaPerumal1
Wireless communication involves the transmission of information over a distance without the help of wires, cables or any other forms of electrical conductors.
Wireless communication is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices.
Features of Wireless Communication
The evolution of wireless technology has brought many advancements with its effective features.
The transmitted distance can be anywhere between a few meters (for example, a television's remote control) and thousands of kilometers (for example, radio communication).
Wireless communication can be used for cellular telephony, wireless access to the internet, wireless home networking, and so on.
2. Introduction & Primer
First, some context
These slides are from the #StartingBlock2015 tour by @blockstrap.
6 European countries in 8 days – (Istanbul, Amsterdam, Barcelona, Prague, Berlin
& London). We met lots of great people, answered lots of great questions and had
a great time. We look forward to meeting many of them again in the near future.
These slides might only make perfect sense if you were at the talks and can
remember all the additional points we made whilst discussing the tech.
This deck is 4th
of 6.
Questions? Comments? @MrAdamGiles adam@neuroware.io
3. Mining
Refresher
➔ Transactions are broadcast to the network
➔ Blocks store records of transactions
➔ Blocks are created by Miners and then broadcast
➔ New blocks are added to the chain
➔ Miners then compete to build the next block
4. Mining
So...
➔ Mining is the process of collecting transactions and ‘solving’ a block
➔ Blocks are immutable, we need to make sure they’re right
➔ We make solving a block hard and slow - maths to the rescue
➔ … but we want to make verifying a block easy
➔ Because we make mining hard, we reward miners… with bitcoin!
➔ Mining is the process of securing the blockchain
5. Mining
Proof of Work
➔ All the transactions in the block are used to create the Merkle Root hash
➔ It’s added to the other metadata in the header, with a nonce
➔ We hash the whole thing, look at the resulting hash
➔ If it starts with a ‘0’ then we’ve solved the block, and broadcast it
➔ If not, we increment the nonce and try again
➔ Repeat until we find the leading zero
8. Mining
Easy Peasy Lemon Squeezy
➔ 11 attempts isn’t very many, we need to make it harder
➔ We introduce the concept of ‘difficulty’
➔ Difficulty defines how many leading zeros when solving the block
➔ The more zeros we have find, the more attempts at hashing we need
➔ More hashing power becomes the driving force amongst miners
9. Mining
Increasing the Difficulty
➔ As a way of controlling how hard it is to solve a block
➔ Can be adjusted to make it easier or harder
➔ Target time of 10mins per block
➔ As miners add hashing power to the network, we need to make it harder
so increase the difficulty to compensate
➔ Difficulty is recalculated every 2016 blocks (approx 2 weeks)
12. Mining
It’s A Race
➔ Miners try to solve the block at the next height from the top of the chain
➔ The first to achieve it gets their block added to the chain
➔ All the other work done by the other miners is ‘wasted’
➔ To create more blocks than other people, you’d have to have more
hashing power than everyone else
➔ Current hashing power in the bitcoin network is more than the top 500
supercomputers combined
13. Mining
Maintaining Blockchain Integrity
Could someone with lots of hashing power control the blockchain?
In theory, yes - simply compute blocks with double spend transactions &
broadcast to the network
But you need to control 50%+1 of the network for it to work reliably
Network is currently at ~340 thousand terahashes per second
That's 340,000,000,000,000,000 hashes per second!
14. Mining
Too Much Math For One Man
➔ Club together in Mining Pools
➔ Each pool has many miners who split the
problem up
➔ All members try to solve the same block
in parallel
➔ Rewards are shared between the
members
41. Why Bother?
Mining
You get paid!
When you collect the transactions into a block, the miner inserts a special
transaction at the beginning called a ‘coinbase’ transaction
This ‘pays’ the miner for the work they did, and collects the transaction fees
from all the transactions
The coinbase value declines over time (halved every 4 years)
This is the only way bitcoin is created - Only 21m btc will be created
42. Could You Fake A Block?
Mining
The hashing work you did ‘proof of work’ is easy to verify, a node will
repeat the final hash you did to see if they get the same result as you.
If not, the node won’t add the block to the blockchain
The coinbase payment amount is based on an algorithm, if you fake
it, the block is rejected
If the block is rejected by the nodes, you don’t get any of the money
you faked
So… no, you can’t fake them!
Assume familiar with software, just not blockchains
Bitcoin can be polizing, quickly decends into conversations/arguments about politics,
But as software is eating the workd, that's what we'll be focusing on
Simplified first , then circle back round and dive deeper
Simplifications can be missleading
Tell meif too fast/slow