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Archive for August, 2009

What is Audio Visual Forensic Analysis?

August 31st, 2009

Audio and Visual evidence is becoming more and more prevalent in court cases around the world. In the UK there are more CCTV cameras than in any other country, some would say this is big brother watching over everything we do, others would see past the scaremongers and see that everyone is using it as it can be an effective way of getting convictions in court.

The main issue with visual evidence in particular is the quality of the recording. There are high definition quality cameras, but these are still relatively scarce due to their cost. Visual forensic analysis can extract data from seemingly unusable digital video content and lead the way to vital information that can solve criminal cases and stand up in court.

Audio forensic analysis is similar in that by examining audio that may at first listen seem inaudible; experts can extract sounds and clear any background noise to give a clear stream of audio evidence. Such recordings can come from any number of sources including mobile telephones or recorded conversations.

As an extended arm of digital forensics, audio and visual forensic experts will also look to recover audio and video information that was thought to have been deleted. With many people storing digital data on computer hard drives or other removable media, it is often the job of computer forensic experts to first recover the data from deep inside the computer’s memory. This multi-step recovery process, from first getting hold of the hardware that is storing the data, to recovering the data to then clean it up so that it can be clear what its contents are can be a large undertaking, but is often ultimately worth it.

Computer Crime experts Cy4or specialise in digital crime, computer forensics and audio visual forensic analysis.

Article Source:http://www.articlesbase.com/security-articles/what-is-audio-visual-forensic-analysis-1172714.html

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Smart Antenna Chip enhances Wi-Fi range, speed

August 30th, 2009

A good antenna is the most important thing to get a microwave radio performance. It is the integral part of the system though manufacturers see it as a necessary evil. Today, the approach has changed a lot with the designers paying more and more attention to the antenna. Smart antennas settle in existing environment and the function and transmission of the system gets optimized. This is actually a new piece of equipment in their portfolio.

In that stratum, the Javelin chip from semiconductor company Motia implements these antennas for Wi-Fi products. This device is grouped with of an array of four antennas. It can widen the range of any 802.11b/g transceiver by four times at most. It can also develop the entire system performance as well as quality of service of the Wi-Fi product.

Generally, Wi-Fi products offer coverage up to 100 meters (over 300 feet). But barriers like walls, floors and ceilings can shorten this range. Reflections from multiple objects and other obstacles can also shorten the range. More over, as the range is inadequate, connectivity speed mechanically drops as signal quality depreciates.

To get rid of this problem, the Javelin is placed between the four-antenna array and the input is given to the wi-fi transceiver chip. The chip uses an appliqué architecture that allows the technology to be used in any access point or client widget.

The Javelin actually outfits an array of four antennas which is similar to the two antenna range configurations which are now generally used on some access points. Through the receive mode, the signals at each antenna are converted to a received-signal strength indicator (RSSI) value. The RSSI is then evaluated and then grouped to bring out the strongest doable output to the amplifier of the Wi-Fi chip set. In case you are unable to understand there are various online PC support companies that help you to do the same.

In the broadcast mode, the signal from the transceiver is separated in four segments. Each of those signals is transferred and amplified by the profile distinct by the received signal before being transmitted. This results in a 13-dB increase over a single antenna. The overall gain mounts up to 18 dB as the javelin is used at both ends of the system.

This fully analog device is compatible with both 802.11b and 802.11g systems and can work with any Wi-Fi product.

Sarah Jones, a decade old in the industry, writes on technology and computer-related issues. Her focus is on hardware troubleshooting. Writing on remote support of PC’s is her forte. The informative articles coherently explain technical complications. Sarah, who belongs to Bertford, has an eye for new development in technology and equips her readers with in-depth information on the same.

Article Source:http://www.articlesbase.com/security-articles/smart-antenna-chip-enhances-wifi-range-speed-1175192.html

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The Usage of Webroot Parental Control Tool

August 29th, 2009

The Webroot is a parental control tool and is also easy-to-use. It has many features that are directed towards blocking the undesirable sites, take control on the games that are used by your child. If you know about the features in details then it will be easy for you to restrict your child’s online browsing.

The special Features of Webroot Parental Control Tool

The tool is specially crafted to manage the Internet usage of your child and the games they are playing online. The Internet filtering system helps you to obstruct the objectionable sites that are frequently used by your child.

A child can be adept to computer knowledge. In that case, this particular child may go into the intricacies of the networking process and it can give a tough time to the parents in stopping them from such acts. But if you are equipped with the right technique then there are ways in handling their search without even letting them know. This easy interface will take you a few minutes in controlling your child, even if he or she is more aware of the PC than you. The Webroot tool has certain features that allow you to monitor what your child is doing online with effectual detailed report.

To sum up, Website tool has the following offer

Since the tool is an easy interface it gifts you certain extra power to implement on your child. It helps in product navigation and also manages or removes any user as required. As you know, the pornography sites and adult-content sites are the most avoidable sites. The filters are the most useful in this regard. They can be customized as the way you want and stop any site or particular keyword that you want to.

Have you ever thought of creating user profile for each child? If no, then start thinking. The profile is tailored according to the child’s needs and age. The plus point is that the program is customized according to your preference. As mentioned earlier, the tool is framed in a way to help parents set the stipulated time for their child. For instance, fix the computer time exactly when your child is going to surf the computer for school-related issues. Outside this perimeter, your child is automatically logged out to his or her bedtime.

To keep a strict vigil on your child, you will be interested in knowing the online programs that are being used. The tool will eventually report to you what are the sites that are used by your child.

Why use Webroot Parental Control tool?

Once at a time, you can install parental control tool for three computers. If there are multiple users for one PC, then the tool can identify that too. The tool is also now compatible with Windows Vista. Hence, the features of Webroot parental control tools are useful and train you to keep control on your child.

Sarah Jones, a decade old in the industry, writes on technology and computer-related issues. Her focus is on hardware troubleshooting. Writing on remote support of PC’s is her forte. The informative articles coherently explain technical complications. Sarah, who belongs to Bertford, has an eye for new development in technology and equips her readers with in-depth information on the same.

Article Source:http://www.articlesbase.com/security-articles/the-usage-of-webroot-parental-control-tool-1175208.html

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