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Cyber Currency – part 3/5 – Blockchain

Cyber Currency - part 3/5 - Blockchain

BLOCKCHAIN A digital ledger or journal of transactions (database) Cryptographic in nature (encrypted) A shared database with write permissions for everybody Validity of transactions is determined cryptographically instead of by a central authority Cryptographic nature Each transaction is combined with the hash value from the previous transaction and a new hash value is calculated Tamper […]

Cyber Currency – part 2/5 – Hashing Algorithms

Cyber Currency - part 2/5 - Hashing Algorithms

HASHING ALGORITHMS Hash = one way encryption Uses a mathematical formula (or algorithm) Maps data of variable size to a unique fixed length string Outputs a string called the “hash” or “digest” The same input always produces the same output It cannot be reversed (cryptographic) There are no collisions (no duplicates from different inputs) Hashing […]

Cyber Currency – part 1/5 – Currency Basics

CURRENCY BASICS Barter systems: Involve direct exchange of goods and services Have no intermediate token like money There are some difficulties: The barter process needs a coincidence of two exchange partners (same time, same place) Some trading goods cannot be easily divided into small parts Deferred payments are problematic Storing wealth is not practical Establishing […]

Transformable 4D Printing

3D printing that produces components that can self assembly, are programmable and transformable is called 4D printing. SEE ALSO: Morphable Robotic Furniture Malleable Morphing Materials Complex Order From Simple Interactions Software That Creates Hardware SW Without HW

Education in the Future

In the early days of human history, education was the process of passing on knowledge from one individual to another in an informal and usually ad hoc arrangement. Then we learned to document knowledge and it became possible to distribute the learning of knowledge and formalize the process into the teacher and school paradigm. Over […]

AR Foursome

An Augmented Reality (AR) filter could be used to change the appearance of our sex partner to any form we desire. This is real sex with a virtual skin. It won’t be long before we find two lovers having sex, with each wearing AR goggles to fantasize about somebody else. This could be considered a […]

Eat the Cooking Instructions

Do It Yourself (DIY) projects are all the rage. A recipe for making good tasting food is an old fashioned version of a DIY project, but this new version includes eating the paper the recipe instructions are printed upon. – [youtube.com]

Self Assembly Using Sound Waves

Imagine scattering puzzle pieces on a table top, then vibrating the table until the pieces all fit into place, solving the puzzle. That’s a crude description of self-assembly, but some molecules like to combine with others when they get into the right position. Using sound waves opens up new possibilities, like assembly in three dimensions […]

We Grow As Our Machines Grow

Human civilization history is a record of extending human effort through external means. The means used are often called “machines”. Our machines extend our reach and amplify our effort. They make us stronger, faster, more accurate, and even smarter. We began with simple tools made from bones and rocks. We learned to use fire as […]

Quality Education for Free

If you have not yet taken a look at Khan Academy, you should. KHANACADEMY – [khanacademy.org] Founded by Salman Kahn in 2006, the academy is non-profit educational resource that uses youtube videos as a primary teaching/learning tool. The videos come in a short enough format to keep attention focused, usually in a range from 6-12 […]