Archive for the ‘Computer & ICT’ Category
It has overcome a major obstacle to quantum computing: how to protect quantum information from the degradation caused by the environment while simultaneously perform calculations in a solid state quantum system.
A group led by physicist Viatsheslav Dobrovitski, Ames Laboratory, United States, and included scientists from the Technical University of Delft in the Netherlands, the University of California at Santa Barbara and the University of Southern California, has taken this major step forward in using the motion of nuclei and electrons individual quantum information processing, overcoming the problem of outside interference.
The great progress made is that these scientists have been able to decouple individual qubits of the environment, so they retain their information while preserving the coupling between qubits themselves. Read the rest of this entry »
Communication systems incorporated within plant information based on the use of local area networks and wide area networks can hardly be subject to a control of a physical nature by users. This implies that the possibility of attack messages in transit become very high and real risk. We can therefore classify these attacks into two distinct types:
- Passive: The information in transit are copied but not modified.
- Active: The information is copied and modified in transit.
Another problem is the users that are part of the communication system, in fact, when COM Express transmitted information is essential to have absolute certainty that the data are actually sent and received only by the recipient, the recipient must also have a chance to verify the authenticity of the sender. On these considerations, it is of vital importance to establish a security protocol on the communication systems.
You must have absolute certainty that the recipient of your messages is actually connected to the network. No data transmitted over the network to be lost or arbitrarily added to those in transit, ensuring the immediate detection of any changes occurred in an accidental or deliberate. In this case we speak of “Authentication of the message”. Total confidentiality of data processed and transmitted. Read the rest of this entry »
Increased energy consumption caused by the use of increasingly powerful computers and the invasion of all types of mobile devices and other devices with data processing functions that need to recharge power source connected to a power supply, has prompted many experts to search for some way to reduce consumption.
Most projects to date focus on more efficient cooling systems or provide the ability for users to activate, on their computers and other devices, energy-saving states, such as the hibernation feature on computers.
A revolutionary new project gives developers the ability to help reduce the power consumption. This is lower that appetite for energy of ones and zeroes in the code, a move far beyond the scope of conventional resources such as hibernation on computers or monitors screensaver.
A team of researchers from the University of Washington has developed a system called EnerJ, which in the simulations, reduce energy consumption up to 50 percent, and has the potential (using the right hardware) to achieve a power cut up to 90 percent.
Network management means the management and monitoring of computer networks. A particular importance is the collection of all devices on the network, the monitoring of these components to their proper monitoring and the continuous measurement of the performance of the network. The ISO has developed with respect to network monitoring, a model called FCAPS, which describes the different types of components of network management.
– Fault management: identification, logging, reporting and fixing errors occur
– Configuration Management: Identification of all components to be monitored
– Accounting management: detecting the use of the network for billing
– Performance Management: performance data and gather statistics and set limits
– Security Management: authentication of users, authorization of access and use
The accounting component had been rather less to the traditional duties of an administrator is, in these days of outsourcing and cloud computing, but more important. For security management mainly includes authentication and authorization of users to play here in many cases, such as the Active Directory directory services, combined with technologies for Single Sign-On or hardware and software tokens, a major role. An increasingly important role also plays the encryption, the most use of mobile devices to pay attention to is on. More about enterprise network management in the corporate network to check out here.
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A group of experts from the University of Newcastle, in the United Kingdom, has developed a virtual “guard” that provides the user more control over your personal data.
The unique system bases its operation on the creation of a gate (gateway) controlled by the user. It is an additional level of security through which any person has to go if you want to use or share information about that user.
The system, developed by the team of Maciej Machulak and Aad van Moorsel at the University of Newcastle, has begun to be tested with photos on Facebook and Picasa, but the next step will be to protect financial information from banks and even information that provides GPS tracking location information of an individual using your mobile phone. Read the rest of this entry »
Quantum computers, still at a very early stage of development, take advantage of the strange properties of matter at extremely small scales. Many experts believe that a fully operational quantum computer will have an impressively higher than the current supercomputers processing speed, based on a much less exotic physical phenomenon. But until now, quantum computers have proved to be extremely difficult to build. The few simple prototypes developed in the laboratory make calculations so rudimentary that it is sometimes difficult to know if they are really using quantum effects in some way.
Scott Aaronson and Alex Arkhipov at MIT have devised an experiment that, to function, provide strong evidence that quantum computers can do things that classical computer can not. Although it would be difficult to construct the experimental apparatus should not be as difficult as building a fully functional quantum computer. Read the rest of this entry »
The search engine Google have entered several improvements to social networks and adapts to provide results closer to the Internet. From now on (although at present only in Google.com), the results will be offered not only by the importance they have, but also by their interaction.
Users can find in his search results notes that indicate when his friends, family or coworkers have published or shared some information about what has been searched. For example, if you do a search on New york and a friend wrote something on a blog about an experience he had there, this post among the results will appear you.
Social search will also be more easily understood by adding annotations when users have shared links on Twitter or on other websites. If someone on which you are interested and you are connected has posted a link will be included in your results with a clearer notation.
For example, if you’re watching a video about a famous and a friend has tweeted, this result will appear in the top when you search regarding this issue, including a picture of your friend. Read the rest of this entry »
An important part of the research focuses on the impact of nanofluids on health and the environment. In the Research Center Casaccia (Rome), a group of researchers at the ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development) is facing a major technological challenge to develop energy tools more efficient: the creation and characterization of nanofluids refrigerants (nanofluids coolants).
The project NanoHex (‘Enhanced nano-fluid heat exchange’; HENIX in the acronym), under the aegis of the 7th Framework Programme of the EU, aims to develop and optimize reliable processes for the production of nanofluids cooling of high performance, to use in controlling the heat from industrial machinery.
In many industrial processes, equipment used emit large amount of heat that can influence the performance of them. “With a heat exchanger to extract heat from the heat source and dispersed so that the machine is operating properly work”, says Dr. Mauro Falconieri, head of the Spectroscopy Laboratory of Functional Materials Research Center Casaccia. “This can be done with a fluid drive the heat from the hot zone to another cooler. The thermal conductivity (physical property of a material determines its ability to heat conduction) of the fluid is a parameter that tells you if you have a more efficient heat transfer”, he adds. To remove the heat source, it is sometimes necessary to apply energy (eg, a pump to circulate the fluid in the heat exchanger). “If the fluid is not efficient, you will probably need a pump too large to disperse heat and reduce the temperature”, explains Dr. Falconieri. “But if the fluid is more efficient, you need a smaller pump. This is why we need a more efficient heat exchanger”, he adds. And this is achieved by introducing nanoparticles in the fluid. Read the rest of this entry »
When investing in real research note, and if not tell that to the control and safety systems. After the controversial body scanner, now comes AIRprint, a system capable of detecting the fingerprints of up to two meters away, according to an article published in the Technology Review at MIT.
Those responsible, the company Advanced Optical Systems (AOS), based in Huntsville, Alabama (USA) indicate that this prototype works by sending polarized light to the hand of a person and analyzing the reflection with two cameras configured to detect different polarizations.
Despite its small size, something smaller than a square tissue box, AIRprint houses two 1.3 megapixel cameras and a source of polarized light. One of the chambers receives horizontally polarized light and the other vertically. By separating the two polarizations, the device superimposed images to produce an accurate fingerprint, which is sent to a computer for verification. Read the rest of this entry »
You do not need complex computer virus or that the phones are the latest generation: a simple text message (SMS) is able to block any mobile phone, according to the Technology Review publication.
To do this, the SMS includes a small program called “binary”, capable of running on any phone, even low-end. This has been demonstrated at a security conference held in Germany two researchers, Collin Mulliner, a doctoral student, and Nico Golde, an undergraduate student, both from the Department of Homeland Security in Telecommunications from the Technical University of Berlin.
In particular, Mulliner and Golde were able to suddenly turn off and disconnect network from the several phones Nokia, LG, Samsung, Motorola, Sony Ericsson, and Micromax, an Indian manufacturer of popular mobile phones.
Each platform requires a specific malicious SMS to work, but according to two researchers, it would be easy to make an attack on a large number of phones by sending a set of five messages focused on the five most popular models, each device in a specific network. Read the rest of this entry »