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Blockchain Explained | What is Blockchain? | Blockchain Technology [Updated 2022]

A blockchain is a list of transactions that anyone can view and verify. It is a system of recording information in a way that makes it difficult or impossible to change, hack, or cheat the system. A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain. Each block in the chain contains a number of transactions, and every time a new transaction occurs on the blockchain, a record of that transaction is added to every participant’s ledger.

Distributed ledger technology: All network participants have access to the distributed ledger and its immutable record of transactions. With this shared ledger, transactions are recorded only once, eliminating the duplication of effort that’s typical of traditional business networks.

Immutable records: No participant can change or tamper with a transaction after it’s been recorded to the shared ledger. If a transaction record includes an error, a new transaction must be added to reverse the error, and both transactions are then visible.

Smart contracts: To speed transactions, a set of rules — called a smart contract — is stored on the blockchain and executed automatically. A smart contract can define conditions for corporate bond transfers, including terms for travel insurance to be paid and much more.

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How AI works in everyday life | Google AI

Ever wonder how AI (artificial intelligence) works? Find out how machines learn to help you with everyday interactions with technology products. T

his is an excerpt from a larger lesson, “Discover AI in Daily Life,” from Applied Digital Skills, Google’s free, online, video-based curriculum.

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What Are DAOs? (And How One DAO Turned $10M into $1B) | Forbes

The leaderless investing collectives known as decentralized autonomous organizations are generating a lot of eyerolls. Thanks to high flexibility and low regulation, they’ll also soon generate a lot of profits.

“This is an incredibly risky move. I don’t know if I agree with this.’’ Erick Calderon, the founder of a company named Art Blocks in a risk-oblivious field, nonfungible tokens, was nonetheless concerned. It was February 2021, and Calderon was one of 59 investors who had banded together to potentially buy a rare set of 150 popular NFTs, CryptoPunks, directly from their producer, Larva Labs.

The group, a decentralized autonomous organization (DAO) called Flamingo, had pooled $10 million and met weekly via Zoom (audio-only to protect those wanting anonymity) to figure out what to do with it. The CryptoPunk opportunity, at about four ether ($7,200 at the time) per punk, would eat 10% of that, which is partly why Calderon aired his concerns on the group’s Discord channel.

The tension got thicker when members discovered one of their own—someone going by the pseudonym “Pranksy”—had tried to front-run the deal, opening a back channel with Larva Labs to buy 150 punks for himself. In the end, Flamingo members voted to spring for the punks, which were recently valued at $30 million. As for Pranksy, he left the DAO “by mutual agreement,” telling Forbes he was “somewhat naïve [about] the DAO process.”

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Building Quantum Computers Using 2D Materials

Quantum computing promises to revolutionize how we solve problems. The advantages that come from using quantum mechanics to solve hard problems are colossal. But we are still a long way from demonstrating solving a functionally useful problem. The main reason is that to solve these problems we require a lot of qubits, as for complex problems the quantum algorithms often require error correction. Which dramatically increases the number of qubits required, from tens to thousands, or even more. Thus, we need to find techniques to scale the production of qubits in a compact and reliable manner. In this latest work from a team at MIT, two-dimensional materials were used to construct superconducting qubits.

They use a combination of NbSi2 and hBN to form a Josephson junction and perform tests on the Qubit’s performance compared to traditional fabricated superconducting qubits. They demonstrate that the performance is very similar despite having a significantly smaller size. This is a promising demonstration of fabricating with 2D materials.

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Forbes Blockchain 50: The Billion Dollar Companies Using Blockchain Technology | Forbes

Since our inaugural roundup of the Blockchain 50, published in 2019, the billion-dollar companies (minimum, by sales or market value) on our annual list have moved beyond test projects and now rely on “distributed ledger” technology to do serious work. A lot of the action is in the back office, verifying insurance claims or facilitating real estate deals. It has also become vital to supply chains, whether checking the provenance of conflict minerals like cobalt or tracking auto parts for Renault. Nearly half of the Blockchain 50 are based outside the United States; 14% are Chinese. New this year: venture capital firms, which as a group invested more than $32 billion in the sector in 2021.

Cryptocurrencies like bitcoin and ether grab all the headlines, especially after booming last year and then losing more than $1 trillion in value since November. But in many ways, speculative cryptocurrencies are the least intriguing blockchain application. The most lasting impact will come as more and more multinationals integrate blockchains into their daily operations, unleashing untold efficiencies.

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What are NFTs? | The Economist

In the past year a new trend in the crypto world has boomed: NFTs, or non-fungible tokens. They started as a way for digital artists to have ownership over their work but have transformed into a dizzying new multi-billion-dollar marketplace. Are they worth the hype?

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