Archivi categoria: Informatica

Smart ring

A smart ring is a wearable electronics device with advanced mobile components that combine features of mobile devices with innovative features useful for mobile or handheld use. Smart rings, which are typically the size of traditional rings or larger, combine the features of a mobile device, such as the ability to make payments and mitigate access control, with popular innovative uses such as gesture control and activity tracking. Smart rings can communicate directly with smart phones or personal computers through a variety of applications and websites, and operate without the need to carry a smart phone, such as when interacting with back-end systems on the cloud through or performing standalone functions such as activity tracking. They typically do not have a display and operate by contextual relevance, such as by making a payment when near a payment terminal, unlocking an electronic lock when near the lock, or controlling home appliances when making gestures in the home. Some smart rings have physical or capacitive buttons to use as an activation mechanism, such as to initiate a gesture.



In 2013, the English firm McLear released the first smart ring for sale. The market is currently around $25 million.



Secure access control such as for company entry and exit, home access, cars, and electronic devices was the first use of smart rings. Smart rings change the status quo for secure access control by increasing ease of use, decreasing physical security flaws such as by ease of losing the device, and by adding two-factor authentication mechanisms including biometrics and key code entry.

Payments and ticketing

Smart rings can perform payments and metro ticketing similar to contactless cards, smart cards, and mobile phones. Security of the transaction is equal to or greater than contactless cards. The first smart ring to be created with contactless payments was the NFC Payment Ring, which was mass produced and unveiled at the Olympics Summer Games at Rio de Janeiro in August 2016.


Replicating smartwatches, smart rings provide features including activity tracking (i.e. step tracking), heart beat tracking, and sleep tracking (through measuring heart beats and movements). The smart ring form factor contains enough space to contain the same components as smart watches. Due to size constraints, smaller components are typically used in current smart ring products in market, such as smaller and less accurate accelerometers, and smaller batteries leading to lower battery life than smart watches.


Smart rings provide social feedback to users and can be used to engage in the user’s environment in a way that other wearables and mobile devices do not permit. Ringly produces a women’s fashion smart ring which lights to notify the user when the user receives a text message, phone call, or other notification. This enables the user to be aware of the notification without having to constantly check her or his smart phone.

RFID / NFC Smart Ring – Size 12 – NTAG213

NFC (near field communication) technology is a great way to interact wirelessly with projects. With the RFID/NFC Smart Ring your ring can communicate with your smart phone/tablet, computer, or much more! Contains two MiFare Ultralight C – NTAG 213’s with 144 bytes of read/write memory. One is on the ‘inside’ of the ring towards the palm, the other is underneath the jewel. You can use tags to launch apps, unlock your phone, transmit a URL, control an Arduino, etc.

RFID / NFC Smart Ring - Size 12 - NTAG213

GNOME 3.30 “Almeria” Desktop Environment Officially Released, Here’s What’s New

After six months of hard work, the GNOME Project released today the highly-anticipated GNOME 3.30 desktop environment, a major new series that brings numerous new features and improvements.

GNOME 3.30 released

Dubbed “Almería” after the host city of the GUADEC (GNOME Users And Developers European Conference) 2018 event that took place in early July, GNOME 3.30 updates numerous of its core apps and components by adding new features and enhancements to make your GNOME desktop experience more pleasant.

What is your favorite Linux window manager?

While many Linux users have a strong preference for a window manager of choice, for those just making their way over from Windows or Mac, it may be hard to understand what a window manager is, or that it’s even something you have a choice in. A window manager is the part of your system that dictates how individual application windows look, and how you can interact with, control, and arrange them.


  • Cinnamon (Muffin)
  • dwm
  • Enlightenment
  • GNOME (Mutter)
  • i3
  • KDE (KWin)
  • Openbox
  • Unity (Compiz)
  • Xfce (Xfwm)

India’s Zebpay Crypto Exchange Flash Crash: Bitcoin and Ethereum Price Fall

Zebpay, which is a big cryptocurrency exchange from India, has recently notified its users that it would not be able to let its users withdraw their tokens for INR if it did not have a supporting bank in a document titled “Prohibition on dealing in Virtual Currencies”.

India's Zebpay Crypto Exchange Flash Crash: Bitcoin and Ethereum Price Fall

After the notice was sent out, all the major cryptocurrencies, ranging from Bitcoin to Ethereum and Ripple were down by more than 10% in what is being called the India Flash Crash by some people.

20 Best Cryptocurrency Lending & Fiat Loan Blockchain Platforms To Use

Different cryptocurrency projects have been offering a wide variety of services for the cryptocurrency market. Some of the most important is the possibility to give crypto loans.

20 Best Cryptocurrency Lending & Fiat Loan Blockchain Platforms To Use

Cryptocurrency lending platforms work by connecting borrowers to a network of lender registered on the platform. In this case, borrowers receive their cryptocurrencies back once the borrower pays the loan. Most of the platforms have loans that are backs by assets, including real estate. But other platforms let users take loans that are backed by Bitcoin or other virtual currencies.

4 Massively Misunderstood Cryptocurrency Principles To Date

4 Key Misconceptions About Cryptocurrency

The rise of cryptocurrencies has been undeniable. With the rising trade value of bitcoins and ethereum it can be clearly seen that that the era of cryptocurrencies is upon us. In fact, financial institutions all over the world have claimed that Bitcoins are indeed a better investment than gold and other precious metals at this point in time. It is also interesting to note that in 2017, the United Nations sent financial aid to Syrian rescue camps via means of cryptocurrency (so as to minimize any internal losses).

4 Key Misconceptions About Cryptocurrency


Domain names are an essential part of creating a website. As they are hosted by centralized platforms, they are susceptible to censorship. Namecoin is a blockchain-based domain solution that eliminates this issue.


Emercoin maintains the idea that blockchain platforms should constantly be evolving, and deliver a continuous stream of new features through which transactions can occur for as many users as possible. The Emercoin platform incorporates many different functions, including innovative applications such as a decentralized torrent tracker.