The world is about to split between centralizers and decentralizers. Which side are you gonna pick? How to choose it? Well, the first step is to understand what is the technology at the base of this separation and because most likely you speak code like me, what best way is to understand it than using code examples?
Many people think that this technology will change the internet and our life, bringing us the web 3.0, a new web more democratic where you will not need to give up to your privacy or security in order to get services. Is it really going to happen? We will see...but better be ready in case.
Passion project tour of tree fort inside, deck & roof #2Cam Rempel
The document describes a tree fort, including a ladder that can be climbed to access the roof. It details parts of the roofing and water system, such as a pipe running from a reservoir down through the roof with a valve to control water flow. Lighting is provided by fluorescent lights and a lamp in a cubby.
Blockchain is the technology that powers Bitcoin, allowing for a decentralized digital currency. Ethereum builds on this concept by enabling decentralized applications and smart contracts to be built and run on its blockchain. In Ethereum, smart contracts are written in the Solidity programming language and deployed to the Ethereum Virtual Machine, where they can store data and transact in the native cryptocurrency, Ether. Developers must be careful when writing smart contracts due to the potential for bugs to have costly consequences.
Bitcoin has brought about a true revolution in how we think about money. In one fell stroke it solved the main problems that afflicted previous attempts at a truly digital currency: distributed consensus, double spending, and external attacks. Perhaps more importantly, it provided the first working version of a blockchain or distributed ledger. However, despite their relative simplicity, the underlying concepts on which these technologies are built are not well known and often obscured by hype and technical jargon.
Since the days of Bitcoin’s founding, many other crypto-currencies have been proposed and released. This tutorial will introduce these technologies in an intuitive way for data scientists, explaining their driving algorithms, motivations, and data structures.
Introduction to Blockchain & developmentAbdullah Aziz
The document discusses blockchain concepts and provides a coding demonstration. It describes key blockchain characteristics like decentralization and immutability. It explains how hashing, Merkle trees, blocks and chains of blocks work to securely store transaction data. Forks that can occur when transactions conflict are also covered. The document differentiates between public and private blockchains. It then demonstrates coding a basic blockchain implementation, including functions for mining blocks and adding them to the peer-to-peer network.
Blockchain Mechanics discusses the technical underpinnings of blockchains and cryptocurrencies like Bitcoin. It explains how blockchains replace centralized databases and authorities with distributed consensus algorithms based on cryptography. Through a series of "games" that simulate the mining process and transactions, it illustrates how blockchains incentivize computational work to validate transactions and how digital signatures prevent cheating by ensuring participants cannot alter transactions or spend coins multiple times. This allows distrustful parties to securely transact without a central authority through the rules enforced by the consensus of the blockchain network.
Blockchain Mechanics discusses the technical underpinnings of blockchains and cryptocurrencies like Bitcoin. It explains how blockchains replace centralized databases and authorities with distributed consensus algorithms based on cryptography. Through a series of "games" that simulate the mining process and transactions, it illustrates how blockchains incentivize computational work to validate transactions and how digital signatures prevent cheating by authenticating transaction origins. This allows blockchains to function as a global transaction system without a central authority where consensus on the rules is determined by the software run by the majority of network participants.
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.
Passion project tour of tree fort inside, deck & roof #2Cam Rempel
The document describes a tree fort, including a ladder that can be climbed to access the roof. It details parts of the roofing and water system, such as a pipe running from a reservoir down through the roof with a valve to control water flow. Lighting is provided by fluorescent lights and a lamp in a cubby.
Blockchain is the technology that powers Bitcoin, allowing for a decentralized digital currency. Ethereum builds on this concept by enabling decentralized applications and smart contracts to be built and run on its blockchain. In Ethereum, smart contracts are written in the Solidity programming language and deployed to the Ethereum Virtual Machine, where they can store data and transact in the native cryptocurrency, Ether. Developers must be careful when writing smart contracts due to the potential for bugs to have costly consequences.
Bitcoin has brought about a true revolution in how we think about money. In one fell stroke it solved the main problems that afflicted previous attempts at a truly digital currency: distributed consensus, double spending, and external attacks. Perhaps more importantly, it provided the first working version of a blockchain or distributed ledger. However, despite their relative simplicity, the underlying concepts on which these technologies are built are not well known and often obscured by hype and technical jargon.
Since the days of Bitcoin’s founding, many other crypto-currencies have been proposed and released. This tutorial will introduce these technologies in an intuitive way for data scientists, explaining their driving algorithms, motivations, and data structures.
Introduction to Blockchain & developmentAbdullah Aziz
The document discusses blockchain concepts and provides a coding demonstration. It describes key blockchain characteristics like decentralization and immutability. It explains how hashing, Merkle trees, blocks and chains of blocks work to securely store transaction data. Forks that can occur when transactions conflict are also covered. The document differentiates between public and private blockchains. It then demonstrates coding a basic blockchain implementation, including functions for mining blocks and adding them to the peer-to-peer network.
Blockchain Mechanics discusses the technical underpinnings of blockchains and cryptocurrencies like Bitcoin. It explains how blockchains replace centralized databases and authorities with distributed consensus algorithms based on cryptography. Through a series of "games" that simulate the mining process and transactions, it illustrates how blockchains incentivize computational work to validate transactions and how digital signatures prevent cheating by ensuring participants cannot alter transactions or spend coins multiple times. This allows distrustful parties to securely transact without a central authority through the rules enforced by the consensus of the blockchain network.
Blockchain Mechanics discusses the technical underpinnings of blockchains and cryptocurrencies like Bitcoin. It explains how blockchains replace centralized databases and authorities with distributed consensus algorithms based on cryptography. Through a series of "games" that simulate the mining process and transactions, it illustrates how blockchains incentivize computational work to validate transactions and how digital signatures prevent cheating by authenticating transaction origins. This allows blockchains to function as a global transaction system without a central authority where consensus on the rules is determined by the software run by the majority of network participants.
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.
As we start to go toward cloud-native infrastructure and build our applications out of microservices, we must fully face the drawbacks and challenges to doing so. Some of these challenges include how to consistently monitor and collect statistics, tracing, and another telemetry, how to add resiliency in the face of unexpected failure, how to do powerful feature routing (ie feature graduation, tap compare ) and much more like securing your services correctly.
Service mesh, in general, helps developers solve this in a non-invasive way.
In this session, we'll show how you can take advantage of these capabilities and show you some patterns that you can implement easily with a service mesh to make your delivery to production smoothly and without surprises.
We expect most developers haven't adequately solved for these issues, so we'll take it step by step and build up a strong understanding of Istio and its patterns, harness its power in your production services architecture.
This presentation gives you the sense on what is Blockchain and how does work
Blockchain is the technology that can disrupt economies by decentralizing , democratizing trust and eliminating unnecessary intermediaries using the TRUST protocol!
(Note: All numbers / brands / currencies used in these slides are for demonstration purposes)
The document discusses blockchain technology and mining in blockchain networks. It explains that blockchain aims to replace centralized systems with decentralized networks to facilitate trustless transactions without third parties. Mining is the process by which transactions are verified and added to the blockchain in a decentralized manner. Miners use cryptographic hashing algorithms like SHA256 to find valid hashes that meet the network's difficulty criteria, allowing new blocks to be added to the immutable blockchain ledger. The nonce is a variable miners increment to get new hashes during the mining process.
Over the past year, we have seen a rapid increase of interest in regards to the Blockchain Technology. During this presentation, we will break down the very basics of what the mysterious Blockchain actually is. We will cover what the Blockchain comprises of, hashing and proof of work, what happens during a transaction and the case for a global currency.
Main points covered:
• Outline potential uses for the technology and what it means for you.
• Secured Hash Algorithm 256 and the proof of work concept.
• What happens during a transaction?
• Breakdown the beginnings of bitcoin.
Presenter:
Our presenter for this webinar will be Kenneth Kimbel who is a cybersecurity professional with over five years of overall experience providing diverse technology services in client-facing roles. Recent Master’s in Cybersecurity Risk Management as well as a JD with a Cybersecurity Law focus. Kenneth has knowledge on both current technical and legal issues in security.
Link to the recorded webinar: https://youtu.be/mSiAqOZ6fNs
Blockchain is a decentralized approach to solving the double spend problem of digital currencies without a central authority. It uses a distributed ledger maintained on many computers to record transactions in blocks linked through cryptography. This allows participants to verify transactions without trusting a central party. Blockchain addresses issues like single points of failure, censorship, and high fees by achieving consensus across a peer-to-peer network through proof of work and an incentive for honest participation in maintaining the ledger. Potential applications include cryptocurrencies like Bitcoin and programmable platforms for smart contracts.
Blockchain technology is currently taking over the world with its amazing features. This presentation covers all you need to know about the basics of blockchain technology with beautiful animations
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
Murughan Palaniachari presents information on blockchain concepts. He discusses how blockchain enables a decentralized future (Web 3.0) with distributed and individual ownership of data. Blockchain uses distributed ledgers and cryptography to securely record transactions in an immutable, transparent and verifiable way without centralized control. Key concepts covered include how blockchain works, the structure of blocks and blockchains, consensus mechanisms, smart contracts, and examples of blockchain use cases.
This document discusses blockchain technology, including what blockchain is, how it works, types of blockchain networks, applications of blockchain, advantages and disadvantages. Blockchain is a distributed digital ledger that records transactions in blocks that are linked using cryptography. It allows for transactions to be recorded and distributed without a central authority. Consensus algorithms like proof of work are used to validate transactions and add new blocks to the blockchain. Blockchain has applications in financial transactions, asset tracking, data storage and decentralized applications. Its advantages include transparency, security and cost reduction. However, it also faces challenges related to speed and implementation costs.
Prof Willy Susilo presented a seminar titled "Blockchain and its Applications" as part of the SMART Seminar Series on 20th September 2018.
More information: https://news.eis.uow.edu.au/event/blockchain-and-its-applications/
Keep updated with future events: http://www.uoweis.co/events/category/smart-infrastructure-facility/
Blockchain, cryptography and tokens — NYC Bar presentationPaperchain
Concise version of presentation delivered at the NYC Bar Association.
Overview of blockchains, how cryptography works on blockchains and the difference between cryptocurrencies and tokens.
This document provides an overview of blockchain technology and its applications. It begins with definitions of blockchain and how it works using cryptography to link transaction records in distributed blocks. It then discusses pillars like decentralization and immutability. Use cases for blockchain include smart contracts, voting, and banking. AWS services for blockchain include Amazon Quantum Ledger Database (QLDB) for managing an immutable transaction ledger, and Amazon Managed Blockchain for creating and managing blockchain networks. Pricing models are also summarized.
This document provides an introduction to blockchain fundamentals and the Provide platform. It defines blockchain as a decentralized, distributed digital ledger that records transactions across many computers in an incorruptible manner. It explains key blockchain concepts like hash functions, digital signatures, elliptic curve cryptography, decentralized networks, proof of work, transactions, and preventing double spends. It positions Provide as a turnkey blockchain platform that allows existing teams and technologies to leverage distributed ledger technology without typical barriers to entry, providing scalable transaction throughput and fast time to value adoption.
The document discusses how blockchain works through immutable ledgers, distributed peer-to-peer networks, and cryptographic hashing. It explains that blockchain uses the SHA-256 hashing algorithm to securely record transactions in distributed ledgers across a network, making the data incorruptible. It also describes how cryptographic hashing provides data integrity and commitment by linking blocks together, thus achieving immutability and preventing unauthorized changes to past transactions.
During this presentation, we will cover a brief introduction into Blockchain technology, historic use cases & emerging trends for Blockchain technology. We will also touch on what to expect from Blockchain technology in 2019. It is important to understand the progress that is being achieved every day with every single step we take towards real use cases for Blockchain projects. 2019 might be the first year where the Blockchain starts to become a central part in people’s lives and in some industries.
Main points covered:
• Conduct a brief introduction to Blockchain technology;
• Discuss both historic use cases and emerging trends for Blockchain technology;
• What to expect from Blockchain technology in 2019
Presenter:
Our presenter for this webinar is Kenneth Kimbel, a Cybersecurity professional with over five years of overall experience providing diverse technology services in client-facing roles. Recent Master’s in Cybersecurity Risk Management as well as a JD with a Cybersecurity Law focus. Currently, Kenneth is a data privacy and Cybersecurity Advisory Consultant with Deloitte. He is also knowledgeable on both current technical and legal issues in security.
Date: March 27th, 2019
Recorded webinar: https://youtu.be/fLjVgj6MAPY
apidays LIVE Australia 2020 - WT* is JWT? by Maciej Trederapidays
The document discusses JSON Web Tokens (JWT). It begins by explaining that JWT is often confused with JSON Web Signature (JWS) which is one way to implement JWT by digitally signing a JSON object. It then discusses some common JWT concepts like the header, payload, signature and registered/custom claims. It also covers best practices like key management with JSON Web Key Sets (JWKS) and common vulnerabilities if certain precautions are not taken with JWT implementation and validation.
apidays LIVE Paris - WT* is JWT? by Maciej Trederapidays
apidays LIVE Paris - Responding to the New Normal with APIs for Business, People and Society
December 8, 9 & 10, 2020
WT* is JWT?
Maciej Treder, Senior Software Development Engineer at Akami Technologies
apidays LIVE LONDON - WT* is JWT? by Maciej Trederapidays
apidays LIVE LONDON - The Road to Embedded Finance, Banking and Insurance with APIs
WT* is JWT?
Maciej Treder, Senior Software Development Engineer at Akamai Technologies
apidays LIVE Hong Kong - WT* is JWT? by Maciej Trederapidays
apidays LIVE Hong Kong - The Open API Economy: Finance-as-a-Service & API Ecosystems
WT* is JWT?
Maciej Treder, Senior Software Development Engineer at Akamai Technologies
Zoom is a comprehensive platform designed to connect individuals and teams efficiently. With its user-friendly interface and powerful features, Zoom has become a go-to solution for virtual communication and collaboration. It offers a range of tools, including virtual meetings, team chat, VoIP phone systems, online whiteboards, and AI companions, to streamline workflows and enhance productivity.
As we start to go toward cloud-native infrastructure and build our applications out of microservices, we must fully face the drawbacks and challenges to doing so. Some of these challenges include how to consistently monitor and collect statistics, tracing, and another telemetry, how to add resiliency in the face of unexpected failure, how to do powerful feature routing (ie feature graduation, tap compare ) and much more like securing your services correctly.
Service mesh, in general, helps developers solve this in a non-invasive way.
In this session, we'll show how you can take advantage of these capabilities and show you some patterns that you can implement easily with a service mesh to make your delivery to production smoothly and without surprises.
We expect most developers haven't adequately solved for these issues, so we'll take it step by step and build up a strong understanding of Istio and its patterns, harness its power in your production services architecture.
This presentation gives you the sense on what is Blockchain and how does work
Blockchain is the technology that can disrupt economies by decentralizing , democratizing trust and eliminating unnecessary intermediaries using the TRUST protocol!
(Note: All numbers / brands / currencies used in these slides are for demonstration purposes)
The document discusses blockchain technology and mining in blockchain networks. It explains that blockchain aims to replace centralized systems with decentralized networks to facilitate trustless transactions without third parties. Mining is the process by which transactions are verified and added to the blockchain in a decentralized manner. Miners use cryptographic hashing algorithms like SHA256 to find valid hashes that meet the network's difficulty criteria, allowing new blocks to be added to the immutable blockchain ledger. The nonce is a variable miners increment to get new hashes during the mining process.
Over the past year, we have seen a rapid increase of interest in regards to the Blockchain Technology. During this presentation, we will break down the very basics of what the mysterious Blockchain actually is. We will cover what the Blockchain comprises of, hashing and proof of work, what happens during a transaction and the case for a global currency.
Main points covered:
• Outline potential uses for the technology and what it means for you.
• Secured Hash Algorithm 256 and the proof of work concept.
• What happens during a transaction?
• Breakdown the beginnings of bitcoin.
Presenter:
Our presenter for this webinar will be Kenneth Kimbel who is a cybersecurity professional with over five years of overall experience providing diverse technology services in client-facing roles. Recent Master’s in Cybersecurity Risk Management as well as a JD with a Cybersecurity Law focus. Kenneth has knowledge on both current technical and legal issues in security.
Link to the recorded webinar: https://youtu.be/mSiAqOZ6fNs
Blockchain is a decentralized approach to solving the double spend problem of digital currencies without a central authority. It uses a distributed ledger maintained on many computers to record transactions in blocks linked through cryptography. This allows participants to verify transactions without trusting a central party. Blockchain addresses issues like single points of failure, censorship, and high fees by achieving consensus across a peer-to-peer network through proof of work and an incentive for honest participation in maintaining the ledger. Potential applications include cryptocurrencies like Bitcoin and programmable platforms for smart contracts.
Blockchain technology is currently taking over the world with its amazing features. This presentation covers all you need to know about the basics of blockchain technology with beautiful animations
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
Murughan Palaniachari presents information on blockchain concepts. He discusses how blockchain enables a decentralized future (Web 3.0) with distributed and individual ownership of data. Blockchain uses distributed ledgers and cryptography to securely record transactions in an immutable, transparent and verifiable way without centralized control. Key concepts covered include how blockchain works, the structure of blocks and blockchains, consensus mechanisms, smart contracts, and examples of blockchain use cases.
This document discusses blockchain technology, including what blockchain is, how it works, types of blockchain networks, applications of blockchain, advantages and disadvantages. Blockchain is a distributed digital ledger that records transactions in blocks that are linked using cryptography. It allows for transactions to be recorded and distributed without a central authority. Consensus algorithms like proof of work are used to validate transactions and add new blocks to the blockchain. Blockchain has applications in financial transactions, asset tracking, data storage and decentralized applications. Its advantages include transparency, security and cost reduction. However, it also faces challenges related to speed and implementation costs.
Prof Willy Susilo presented a seminar titled "Blockchain and its Applications" as part of the SMART Seminar Series on 20th September 2018.
More information: https://news.eis.uow.edu.au/event/blockchain-and-its-applications/
Keep updated with future events: http://www.uoweis.co/events/category/smart-infrastructure-facility/
Blockchain, cryptography and tokens — NYC Bar presentationPaperchain
Concise version of presentation delivered at the NYC Bar Association.
Overview of blockchains, how cryptography works on blockchains and the difference between cryptocurrencies and tokens.
This document provides an overview of blockchain technology and its applications. It begins with definitions of blockchain and how it works using cryptography to link transaction records in distributed blocks. It then discusses pillars like decentralization and immutability. Use cases for blockchain include smart contracts, voting, and banking. AWS services for blockchain include Amazon Quantum Ledger Database (QLDB) for managing an immutable transaction ledger, and Amazon Managed Blockchain for creating and managing blockchain networks. Pricing models are also summarized.
This document provides an introduction to blockchain fundamentals and the Provide platform. It defines blockchain as a decentralized, distributed digital ledger that records transactions across many computers in an incorruptible manner. It explains key blockchain concepts like hash functions, digital signatures, elliptic curve cryptography, decentralized networks, proof of work, transactions, and preventing double spends. It positions Provide as a turnkey blockchain platform that allows existing teams and technologies to leverage distributed ledger technology without typical barriers to entry, providing scalable transaction throughput and fast time to value adoption.
The document discusses how blockchain works through immutable ledgers, distributed peer-to-peer networks, and cryptographic hashing. It explains that blockchain uses the SHA-256 hashing algorithm to securely record transactions in distributed ledgers across a network, making the data incorruptible. It also describes how cryptographic hashing provides data integrity and commitment by linking blocks together, thus achieving immutability and preventing unauthorized changes to past transactions.
During this presentation, we will cover a brief introduction into Blockchain technology, historic use cases & emerging trends for Blockchain technology. We will also touch on what to expect from Blockchain technology in 2019. It is important to understand the progress that is being achieved every day with every single step we take towards real use cases for Blockchain projects. 2019 might be the first year where the Blockchain starts to become a central part in people’s lives and in some industries.
Main points covered:
• Conduct a brief introduction to Blockchain technology;
• Discuss both historic use cases and emerging trends for Blockchain technology;
• What to expect from Blockchain technology in 2019
Presenter:
Our presenter for this webinar is Kenneth Kimbel, a Cybersecurity professional with over five years of overall experience providing diverse technology services in client-facing roles. Recent Master’s in Cybersecurity Risk Management as well as a JD with a Cybersecurity Law focus. Currently, Kenneth is a data privacy and Cybersecurity Advisory Consultant with Deloitte. He is also knowledgeable on both current technical and legal issues in security.
Date: March 27th, 2019
Recorded webinar: https://youtu.be/fLjVgj6MAPY
apidays LIVE Australia 2020 - WT* is JWT? by Maciej Trederapidays
The document discusses JSON Web Tokens (JWT). It begins by explaining that JWT is often confused with JSON Web Signature (JWS) which is one way to implement JWT by digitally signing a JSON object. It then discusses some common JWT concepts like the header, payload, signature and registered/custom claims. It also covers best practices like key management with JSON Web Key Sets (JWKS) and common vulnerabilities if certain precautions are not taken with JWT implementation and validation.
apidays LIVE Paris - WT* is JWT? by Maciej Trederapidays
apidays LIVE Paris - Responding to the New Normal with APIs for Business, People and Society
December 8, 9 & 10, 2020
WT* is JWT?
Maciej Treder, Senior Software Development Engineer at Akami Technologies
apidays LIVE LONDON - WT* is JWT? by Maciej Trederapidays
apidays LIVE LONDON - The Road to Embedded Finance, Banking and Insurance with APIs
WT* is JWT?
Maciej Treder, Senior Software Development Engineer at Akamai Technologies
apidays LIVE Hong Kong - WT* is JWT? by Maciej Trederapidays
apidays LIVE Hong Kong - The Open API Economy: Finance-as-a-Service & API Ecosystems
WT* is JWT?
Maciej Treder, Senior Software Development Engineer at Akamai Technologies
Similar to Blockchain By Code examples - Devoxx Poland 2018 (20)
Zoom is a comprehensive platform designed to connect individuals and teams efficiently. With its user-friendly interface and powerful features, Zoom has become a go-to solution for virtual communication and collaboration. It offers a range of tools, including virtual meetings, team chat, VoIP phone systems, online whiteboards, and AI companions, to streamline workflows and enhance productivity.
Enterprise Resource Planning System includes various modules that reduce any business's workload. Additionally, it organizes the workflows, which drives towards enhancing productivity. Here are a detailed explanation of the ERP modules. Going through the points will help you understand how the software is changing the work dynamics.
To know more details here: https://blogs.nyggs.com/nyggs/enterprise-resource-planning-erp-system-modules/
Quarkus Hidden and Forbidden ExtensionsMax Andersen
Quarkus has a vast extension ecosystem and is known for its subsonic and subatomic feature set. Some of these features are not as well known, and some extensions are less talked about, but that does not make them less interesting - quite the opposite.
Come join this talk to see some tips and tricks for using Quarkus and some of the lesser known features, extensions and development techniques.
Why Mobile App Regression Testing is Critical for Sustained Success_ A Detail...kalichargn70th171
A dynamic process unfolds in the intricate realm of software development, dedicated to crafting and sustaining products that effortlessly address user needs. Amidst vital stages like market analysis and requirement assessments, the heart of software development lies in the meticulous creation and upkeep of source code. Code alterations are inherent, challenging code quality, particularly under stringent deadlines.
A Study of Variable-Role-based Feature Enrichment in Neural Models of CodeAftab Hussain
Understanding variable roles in code has been found to be helpful by students
in learning programming -- could variable roles help deep neural models in
performing coding tasks? We do an exploratory study.
- These are slides of the talk given at InteNSE'23: The 1st International Workshop on Interpretability and Robustness in Neural Software Engineering, co-located with the 45th International Conference on Software Engineering, ICSE 2023, Melbourne Australia
When deliberating between CodeIgniter vs CakePHP for web development, consider their respective strengths and your project requirements. CodeIgniter, known for its simplicity and speed, offers a lightweight framework ideal for rapid development of small to medium-sized projects. It's praised for its straightforward configuration and extensive documentation, making it beginner-friendly. Conversely, CakePHP provides a more structured approach with built-in features like scaffolding, authentication, and ORM. It suits larger projects requiring robust security and scalability. Ultimately, the choice hinges on your project's scale, complexity, and your team's familiarity with the frameworks.
Hand Rolled Applicative User ValidationCode KataPhilip Schwarz
Could you use a simple piece of Scala validation code (granted, a very simplistic one too!) that you can rewrite, now and again, to refresh your basic understanding of Applicative operators <*>, <*, *>?
The goal is not to write perfect code showcasing validation, but rather, to provide a small, rough-and ready exercise to reinforce your muscle-memory.
Despite its grandiose-sounding title, this deck consists of just three slides showing the Scala 3 code to be rewritten whenever the details of the operators begin to fade away.
The code is my rough and ready translation of a Haskell user-validation program found in a book called Finding Success (and Failure) in Haskell - Fall in love with applicative functors.
Utilocate offers a comprehensive solution for locate ticket management by automating and streamlining the entire process. By integrating with Geospatial Information Systems (GIS), it provides accurate mapping and visualization of utility locations, enhancing decision-making and reducing the risk of errors. The system's advanced data analytics tools help identify trends, predict potential issues, and optimize resource allocation, making the locate ticket management process smarter and more efficient. Additionally, automated ticket management ensures consistency and reduces human error, while real-time notifications keep all relevant personnel informed and ready to respond promptly.
The system's ability to streamline workflows and automate ticket routing significantly reduces the time taken to process each ticket, making the process faster and more efficient. Mobile access allows field technicians to update ticket information on the go, ensuring that the latest information is always available and accelerating the locate process. Overall, Utilocate not only enhances the efficiency and accuracy of locate ticket management but also improves safety by minimizing the risk of utility damage through precise and timely locates.
Launch Your Streaming Platforms in MinutesRoshan Dwivedi
The claim of launching a streaming platform in minutes might be a bit of an exaggeration, but there are services that can significantly streamline the process. Here's a breakdown:
Pros of Speedy Streaming Platform Launch Services:
No coding required: These services often use drag-and-drop interfaces or pre-built templates, eliminating the need for programming knowledge.
Faster setup: Compared to building from scratch, these platforms can get you up and running much quicker.
All-in-one solutions: Many services offer features like content management systems (CMS), video players, and monetization tools, reducing the need for multiple integrations.
Things to Consider:
Limited customization: These platforms may offer less flexibility in design and functionality compared to custom-built solutions.
Scalability: As your audience grows, you might need to upgrade to a more robust platform or encounter limitations with the "quick launch" option.
Features: Carefully evaluate which features are included and if they meet your specific needs (e.g., live streaming, subscription options).
Examples of Services for Launching Streaming Platforms:
Muvi [muvi com]
Uscreen [usencreen tv]
Alternatives to Consider:
Existing Streaming platforms: Platforms like YouTube or Twitch might be suitable for basic streaming needs, though monetization options might be limited.
Custom Development: While more time-consuming, custom development offers the most control and flexibility for your platform.
Overall, launching a streaming platform in minutes might not be entirely realistic, but these services can significantly speed up the process compared to building from scratch. Carefully consider your needs and budget when choosing the best option for you.
Do you want Software for your Business? Visit Deuglo
Deuglo has top Software Developers in India. They are experts in software development and help design and create custom Software solutions.
Deuglo follows seven steps methods for delivering their services to their customers. They called it the Software development life cycle process (SDLC).
Requirement — Collecting the Requirements is the first Phase in the SSLC process.
Feasibility Study — after completing the requirement process they move to the design phase.
Design — in this phase, they start designing the software.
Coding — when designing is completed, the developers start coding for the software.
Testing — in this phase when the coding of the software is done the testing team will start testing.
Installation — after completion of testing, the application opens to the live server and launches!
Maintenance — after completing the software development, customers start using the software.
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
In this session we will cover:
- The Art of Effective Code Reviews
- Streamlining the Review Process
- Elevating Reviews with Automated Tools
By the end of this presentation, you'll have the knowledge on how to organize and improve your code review proces
What is Augmented Reality Image Trackingpavan998932
Augmented Reality (AR) Image Tracking is a technology that enables AR applications to recognize and track images in the real world, overlaying digital content onto them. This enhances the user's interaction with their environment by providing additional information and interactive elements directly tied to physical images.
E-commerce Application Development Company.pdfHornet Dynamics
Your business can reach new heights with our assistance as we design solutions that are specifically appropriate for your goals and vision. Our eCommerce application solutions can digitally coordinate all retail operations processes to meet the demands of the marketplace while maintaining business continuity.
Takashi Kobayashi and Hironori Washizaki, "SWEBOK Guide and Future of SE Education," First International Symposium on the Future of Software Engineering (FUSE), June 3-6, 2024, Okinawa, Japan
2. @MagemelloMario#DevoxxPL
Mario Romano is the Director of
Applications in Alfresco but he
is still really much involved with
the coding as open source
contributor for various projects.
Mario Romano
Director of Applications in
Alfresco
4. @MagemelloMario#DevoxxPL
• Understand what is Blockchain
• Implementation of a Blockchain without network
• Implementation of a Blockchain with network
• Implementation of a Blockchain with network & wallet
• Blockchain evolution
• Demo
Agenda
16. @MagemelloMario#DevoxxPL
CAP Theorem
CONSISTENCY
All clients see the same data at the
same time
AVAILABILITY
The system continue to
operate even in case of node
failure
CA
PARTITION
TOLERANCE
The system continue to operate as
expected even in case of partial
network failure
APCP
X
21. @MagemelloMario#DevoxxPL
• A transaction represents any change in a database.
• In blockchain transactions are signed with private keys
• The signature of a transaction can be validated by peers
using the transaction sender public key
• To avoid malicious behavior and prevent reuse of the
same transaction each transaction can have a unique id
Transaction
{data…..}, timestamp signatur
e
22. @MagemelloMario#DevoxxPL
Transaction Lifecycle
Create
transaction
The transaction is
propagated to the networ
k
The transaction is verifi
ed by the peers
{ …. }
{ …. }
{ …. }
{ …. }
The transaction is added to t
he pending transactions que
ue
New block containing t
he transactions is mine
d
The new block is added
to the chain
The transaction
is completed
25. @MagemelloMario#DevoxxPL
• Key pairs system (public key and private key)
• Blockchain addresses are defined using public keys
• The messages encrypted with a public key can only be
decoded using the private key
• Always keep the private key secret and feel free to
distribute the public key
Cryptography
29. @MagemelloMario#DevoxxPL
• There is only one special Block, the genesis block
• Every block is hashed
• Each block contains the hash of the block generated
before, in this way all the blocks are chained together
• This is part of the reason why blocks are considered
immutable records
• Each block has a timestamp to be able to tell what and
when something happened (The chain keep the history)
• The hash is a unique identifier
Block
33. @MagemelloMario#DevoxxPL
• The hashing function creates 64 characters unique id
(SHA-256)
• You can use the hash to validate the data
• You can’t recreate the data from a hash, it’s a one-way
function
Hashing
010101
010101
010101
010
Hash
Value
{000df2df78d2f87abf13f648febc3e522649804d701d07aac600f2b265bf5c75}
f(x)
SHA256
34. @MagemelloMario#DevoxxPL
• Hash - Is used as checksum for the blocks, because if you change the info
in the block the hash will change
• Difficulty - Is the number of times that an established char has to be
repeated at the beginning of the hash in order to be valid
• Nonce - Is a random number that gets added to the payload in order to
obtain a valid hash
• Nonce + Difficulty -> forces the hash function to be repeated until it starts
with the established numbers of nonce and is impossible guess the nonce
number to have the right repetition of a certain number in front the hash.
• This is the mathematical problem at the base of the mining and also
because is complicated to calculate make sure one single person can’t
recalculate the entire chain and rewrite the history in his favor
Hashing
38. @MagemelloMario#DevoxxPL
Ledger
• Events storage of blocks
• If we have 2 conflicting ledger, the longest chain wins,
because has most computational power
• For this reason a chain is verified only after few blocks (~
6)
• Unless you have more than 50% of the computational
power of the network you will not be able to create a
longer chain and impose your history
42. @MagemelloMario#DevoxxPL
• Mining consist in the resolution of a complex
mathematical problem (proof of work)
• Mining is used to validate transactions and ensure the
immutability of the chain
• Miners are incentivized with rewards
• Mining is used to validate transactions and ensure the
immutability of the chain
• Miners are specialized nodes
Mining
45. @MagemelloMario#DevoxxPL
• Blockchain is a distributed system, this means that there
is no central authority to validate the transactions in the
database
• The database is maintained and validated by a large
number of computers that offers their computational
power and are incentivized through a reward system
(mining)
• With the consensus (proof of work) the nodes don’t need
to trust each other, they need only to trust the
mechanism provided by the system
Consensus
50. @MagemelloMario#DevoxxPL
• Can be computer code stored and executed in the blockchain
• Remove the need for a central authority to create and enforce the
contract agreement
• The best example of blockchain supporting smart contracts is
Ethereum
• The contract is immutable and no one can change it (the code is
law)
Smart contracts
hash
genesis
block
block
hash
block
data datacod
e
cod
e
51. @MagemelloMario#DevoxxPL
• For example, 4 people can agree to get some interest when the
value of an investment riches a certain value, the code in the smart
contract will release the interest automatically to their account
when this condition is solidified.
Smart contracts example
Wallet icon author: Joseph Augustine
Stock icon author: Giannis Choulakis
==code
Smart contract
54. @MagemelloMario#DevoxxPL
Web 1.0 Web 3.0
Web 2.
0
Read and Write
centralized information
Read and Write
decentralized information
Read Only
King icon author: Sharon Showalte
WEB Evolution
Come day after tomorrow to our workshop about Activiti
In Alfresco we want to make digital transformation smart and easy. We offer a platform, composed of ui components and rest APIs to companies that want to digitalize their contents an processes.
And IF you think to content and process you can see the relation with blockchain and smart contracts….
Blockchain was invented by Satoshi Nakamoto to serve as the public transaction ledger of the bitcoin cryptocurrency .
Sataoshi wanted to create a database and make near impossible to remove or corrupt information in that database, he also wanted it to be transparent and make everyone able to have a copy of that database
Etherium was created by Vitalik Buterin and from many people is considered the base for blockchain 2.0 & 3.0, the reasoin is tbe ability that it has to run scripts on the blockchain
And if we think about blockchain 1.0….we can say that is a distributed database
Availability and partition tolerance are business properties….usually business prefers sacrifice consistency and deal with it in a different way
AP
Blochchain is more than just technology….is also a social and Economy phenomenon…but today we will not cover the social and economic part
A transaction represents any change in a database. Like in any other database blockchain stores transactions and trough them you can reconstitute the actual state.
In blockchain transactions are signed with private keys….so we can validate the authenticity of a transaction
The sign of a transaction can be validated by peers using the transaction sender public key
In our case here we will assume that the timestamp is the unique id
How do we sign a transaction? And how do we validate it?
we don’t cover the code part in this presentation, but I will explain you how this work
because the hash value of a block depends also on the hash of the previous block
Not know how to manage complex situation when rules are less strict and needs a certain degree of jugjments
Not know how to manage complex situation when rules are less strict and needs a certain degree of jugjments
In order to get to Blockchain 3.0 we still have to solve some challenges about scalability and sustenability of the proof of work, it may will require to switch to other system…like proof of stake
All companies working on Blockchain projects
Missing signature on transaction….next demo
Why we want to decentralize?
Upgrade peers problem?
Use cases for blockchain?
Decentralizers vs Centralizers….reasons?
Decentralizers vs Centralizers pro cons?
Blockchain limiits?-> Transactions per second? Size Block?