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Arquivo para a ‘circuits’ Categoria

Pass the box to pay now is fast

07 Jul

Near to fiction until recently, watches with sensors NFC (Near Field Communication) reachedBellamy the Brazilian market through Bellamy model, with it you approach the product of the clock and the payment is made in seconds.

 
The battery it lasts for years, only different from the traditional cards on the clock there is nothing to show that it is being used for purchases making discreet and secure payment, and the partnership was made with Visa and Brazil Pré-pago.

 
It has an NFC antenna with a chip “contactless” Visa that communicates with contactless payment terminals, so are expensed credits are previously made by a bank payment function and the company ensures that credit is safe .
Like any technology market the initial change is slow, this type of NFC device already existing in some pieces of clothing and luxury goods should then be present in the simplest grocery product, coexisting with the current bar codes, but with the time the bar code itself may disappear.

 

IoT is arriving  

23 May

 

If we have 7 billion people in the world, of which nearly 5 billion areBillionDevices connected, the number of devices is 50 billion and the connection between devices may be even more surprising change that has happened to the internet.

 

The protocols until recently were reduced, now new patterns begin to emerge beyond the known BlueTooth, arrives with force now ZBee or ZigBee.

 

The BlueTooth also evolved into the BlueTooth Low-Energy (BLE) or Smart Bluetooth, as old and known protocol for the Internet of things remains strong, since energy consumption is a significant item for the adoption of IoT technologies.

 

But ZigBee is growing in number of applications and devices, and start earning much interest in developers used in automation of homes, buildings and industrial areas, use an IEEE 802.15.4 standard protocol that is an industry standard wireless technology that operates to applications in the 2.4 GHz range require little data exchange and operate a range of 100 m, so excellent for homes, buildings and industrial.

 

An evolution of ZBee is the standard RF4CE which has some advantages for complex systems with low power consumption, high security, robustness and high scalability with the addition of nodes and can be inserted into wireless sensor control networks for M2M applications (Machine to Machine) in the IoT.

 

The latest version is ZBee 3.0, which unifies all ZigBee standards into a single standard.

 

There are other standards will comment in the next posts.

 

200 years of George Boole

02 Nov

Born November 2, 1815, Algebra which created was instrumental inBoole the birth of digital logic (0 and 1, or F=false and V=True), and later at MIT, Vannevar Bush suggested to Claude Shannon who was to become one of the foundations of modern digital computing .


The development of Boole became one of the important mathematical schools, which would influence the philosopher Bertrand Russerl, who wrote; “Pure mathematics was discovered by Boole in his work ‘Laws of Thought’ ‘which was published in 1850.


Although this is a mistake, because the thought does not move for binary laws, Yes and No, as there is perhaps the power and an endless variety of possibilities, Boole later did important work called invariant (or calculus of variations) , which influenced the Theory of Relativity of Albert Einstein.


In 1838, he published a pamphlet called The Mathematical Analysis of Logic, which influenced De Morgan who made a number of simplifications to make the laws of Algebra Boole more simple and easy to be “adopted” in mechanical, electromechanical processes (relays that have emerged more afternoon) and all digital devices that have emerged from these “laws”.


Although it has already died with great respect, it was Whitehead and Russell work Principia Mathematica (1910-1913) who convinced mathematicians that symbolic logic should receive your serious attention.

 

(Português) Velocidade e armazenamento: o limite do silício

30 Sep

Sorry, this entry is only available in Brazilian Portuguese.

 

(Português) Limites reais da Lei de Moore

19 Aug

Sorry, this entry is only available in Brazilian Portuguese.

 

(Português) Repensando os computadores

18 Aug

Sorry, this entry is only available in Brazilian Portuguese.

 

(Português) Chip do tamanho de um selo

15 Aug

Sorry, this entry is only available in Brazilian Portuguese.

 

Crystal Superman´memories is created

13 Nov

A team of researchers from the University of Southamptom , UK , created a crystal capable of storing digitalCristalSuperHomem information in five dimensions , beyond the three conventional space , plus two extras using nanostructures ( structures at the level of the atom in the order of 10-9 meter) .

These devices can reach the capacity of 360TB of data stored , equivalent to one million times larger than a CD , for example , 360 GB , assuming it has a display device and projection, one childhood memory of Superman, would practically possible now .

Because of the similarity with the film , the device is already called “crystal memory of Superman ” because the crystals resembles memory movie Superman .

According to Professor project supervisor , Pete Kazansky : it is ” exciting to think that was created the first ‘ document ‘ able to survive the human race ” as this ” this technology can store the latest evidence of civilization : what has been learned will not be forgotten ” , and under normal conditions will keep the information for 1 million years .

The paper ‘5D Data Storage by Ultrafast Laser Nanostructuring in Glass’ was presented in Conference on Lasers and Electro-Optics (CLEO’13) in San Jose.

 

Making clouds secure

10 Jul

Cloud computing means outsourcing computing tasks over the Internet, which on one hand can give users home computer processing power and unprecedented that small businesses can use Web services more sophisticated, without building huge banks data servers.

But precisely this outsourcing can lead to huge security problems, since the cloud is treated as a condominium, as can happen cite the article by MIT presented in International Symposium on Computer Architecture, assuming a set of cloud servers can be running 1,000 simultaneous applications to customers, without the knowledge of the exact web hosting service that is provided, such an application has another purpose, to spy on the other 999.

In International Symposium on Computer Architecture recently happened in June, the MIT researchers described a new type of secure hardware component called Ascend, mixing patterns of memory access to a server, which makes it impossible in the case of an attacker infer the data that is stored.

But perhaps only powerful companies and governments are able to use this, what they discuss is who can control and do not control the informal is cool, see how all states treat Snowden, who made the initial complaint data: some country will receive him?

 

But the solution in Brazil is the Brazilian satellite launch two submarine cables and the installation of a Federal Internet Exchange (FIE) International, here are things like na expensive things.

 

Crescimento dos chips vai continuar

16 Oct

A quase 50 anos, Gordon Moore anunciou uma lei que os dispositivos de processamento (os de memória são mais lentos) dobravam sua velocidade a cada dois anos, por causa disto esta “lei” ficou conhecida como Lei de Moore.

No entanto o limite de velocidade usando os chips de silício estava sendo alcançado, por isto o uso dos fans (ventiladores dos chips), mas já em 2011, pesquisadores do mundo inteiro buscavam alternativas ao Silício, num laboratório de Stanford, Max Shulaker produziu, ainda que de modo artesanal, os menores circuitos do mundo usando uma tecnologia nova com os nanotubos de carbono, o material básico dos chips de grafeno, e depois disto aos poucos o processo foi se tornando industrial.

O novo tipo de material para chips é chamado CNFET(Transistores de efeito de campo de nanotubo de carbono), segundo o New York Times, o primeiro a produzir em laboratório foi feito no Robust System Group (há pesquisas desde 2002), um grupo liderado por Subhasish Mitra, ex-engenheiro da Intel, o chip feito na época tinha largura de 6 átomos de silício.

Publicamos recentemente um post (ver) que um grupo de pesquisadores e professores da Universidade Rice, entre eles o químico James Tour, encontraram um interessante efeito do óxido de carbono e silício, usando o grafeno, tendo como resultado uma memória em superfície transparente, que pode ser construída em 3D, com largura de um átomo de carbono.

Este dispositivo pode ser usado para memórias não-voláteis (substitui os Hardisk, pendrive e DVDs), resistentes ao calor, corrosão e a radiação.