Archive | April 2011

Mail Servers and Web Servers

Need of Different Mail Servers and Web Servers

The mail server is like a postman or mailman which helps you in getting your electronic mails. When people sent their emails they pass through different mail servers of different internet service providers. If the email does not pass through these different servers you are not able to send it to different domains.

There mainly two types of mail servers like outgoing and incoming mail servers. For outgoing mails there is SMTP (Simple Mail Transfer Protocol) servers and POP (Post Office Protocol) for incoming. The incoming mail servers are also two types i.e. POP3 and IMAP (Internet Message Access Protocol). The work of IMAP is to store the copies of the messages on the server whereas POP downloads and stores the original messages from the server to the computer system. If you are using different mail servers there are some settings which should be followed.

For Yahoo! Mail settings it offers the POP3 access for those emails which come through the mailbox –
Incoming mail server – pop.mail.yahoo.com (port 110)
Outgoing mail server – smtp.mail.yahoo.com (port 25)
For Google Mail settings it uses POP3 on SSL connection –
Incoming mail server – pop.gmail.com (port 995)
Outgoing mail server – smtp.gmail.com (port 465)
If you are using the Lycos mail plus service you can save the setting –
Incoming mail server – pop.mail.lycos.com (port 995)
Outgoing mail server – smtp.mail.lycos.com (port 465)
There are many more email servers for which we can use the settings according to the requirement.
When we use different types of servers a name web server also comes into mind while it is also used by many of the mail server services providers. A web server is a computer program that circulates different pages according to the request given to it. The machine on which this program is executed is known as server. Every time the computer which connects to the internet has a unique number i.e. the IP address known as internet protocol address. It gives the system a unique identification number. This gives other computers to find the other ones and to communicate with each other.

Most of the companies which offer theweb server servicesuse Apache web server because it actually receives and answers the requested web pages. Many developers and designers use Apache in designing new products. Web servers are also handling the data requests for different protocols such as SMTP and FTP for email and file transfer protocol respectively.

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Sony DCR-SR62E

Preview Sony DCR-SR62E

The recent explosion in digital video sales has caused a staggering number of cameras to enter the marketplace. Even after you’ve narrowed down the format you want (Mini DV, DVD or HDD), the decision can still be overwhelming, with a huge range of competing models vying for your wallet’s attention. The trick is to weigh a camera’s useful features against its asking price – there’s no point spending extra cash on modes and settings you’re unlikely to use, yet at the same time, you need something that is capable of capturing decent footage. Sony’s DCR-SR62E manages to strike a reasonable balance between these two yardsticks, offering fair picture quality and some nice user-friendly features for under $1000.

SONY DCR-SR62E

The DCR-SR62E is a HDD-based model, which means you don’t need to muck about with discs or tapes when recording. Instead, all footage is stored on the camera’s built-in 30GB hard drive, which can hold up to twenty-one hours of data (though only seven at the highest quality). Transferring your videos to a PC is a simple process thanks to the included docking station, which also doubles as a battery charger. This device is particularly handy when it comes to burning DVDs, with the dedicated Disc Burn button making for a simple one-step procedure. (An optional DVD Burner called DVDIRECT can be purchased separately, which allows you to perform the same function without a computer.) If you’re not the most technically proficient person in the world or prefer to make movies with a minimum of fuss, this feature is sure to be appreciated.

One minor issue with the docking station is that the camera tends to ‘sit’ on top of the base, rather than sinking snugly inside – a result of Sony using the same exact unit for its variously shaped HDD cameras. This can occasionally prove frustrating during battery charges or data transfers, when an unintended bump can interrupt the process.

SONY DCR-SR62E

In terms of design, the DCR-SR62E is virtually identical to Sony’s cheaper model, and subsequently suffers from many of the same flaws. Its diminutive size (73mm x 72mm x 109mm) can be quite a hindrance for inexperienced users – at less than half a kilogram, the unit is difficult to hold steady, especially when shooting at higher zoom magnifications. On the other hand, it does make the camera a lot easier to carry around, and your arms are unlikely to tire during lengthy shoots. Bear in mind however, that your footage will probably look a little shaky and amateurish until you get used to its flimsy design.

Another questionable design feature that the DCR-SR62E shares with its cheaper cousin is the lack of a viewfinder. The only way to monitor your footage is via the LCD touch screen display. This can often prove frustrating in sunny conditions when the screen is difficult to see, or when you are running low on battery life (LCD screens drain power a lot quicker than viewfinders.) Naturally, if you rarely use the viewfinder on a camera, its absence will mean nothing to you, but it nevertheless remains something to be mindful of.

On the plus side, the identical touch screen interface is very easy to get to grips with, allowing first-time users to cycle through different modes and functions without needing to consult the manual. The inclusion of a prominently marked ‘easy’ button is especially handy for amateur users who would prefer to avoid the menu screen entirely.

So what exactly does the DCR-SR62E offer over the DCR-SR42E to justify the steeper price tag? At first glance, it seems as if Sony accidentally got the two models mixed up. Both cameras include 30GB of storage space and most of the same features, yet the pricier DCR-SR62E has a significantly less powerful optical zoom (25x, instead of 40x). Presumably this was a marketing decision on Sony’s part, as higher zooms tend to appeal to the entry-level buyer.

Thankfully, the DCR-SR62E makes up for its smaller zoom magnifications with higher picture resolution, thus justifying its place on top. The 1MP CCD sensor does an admirable job of capturing sharp, colourful images; especially in comparison to the DCR-SR42E, which has a resolution of just 680,000 pixels. While it can’t compete with pricier models such as the , most users should be satisfied with the majority of this camera’s video output.

Naturally, it fares less well in poorly lit environments, producing grainy, ill-defined results which the camera has difficulties focusing on. The included nightshot mode alleviates this to a certain degree, though the flat, monochrome palette is off-putting and unevenly lit. However, these are all problems that you would expect from a camera in this price range, and as such, are not worth marking the camera down over.

When you consider that the DCR-SR62E is only $100 more expensive than the DCR-SR42E, the choice over which model to buy is pretty obvious, despite the less powerful zoom. Plus, the DCR-SR62E shoots in a native aspect ratio of 16:9 (as opposed to 4:3), making it ideal for people with widescreen TVs. An external microphone jack and accessory shoe are also included – an essential component for anyone who hopes to capture crystal clear audio. All up, this is a pretty good camera for the asking price, offering the convenience of HDD technology at a very attractive price.

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GPS Tracking Systems

GPS Tracking Systems May Be Used For Invasion Of Privacy

A network of orbiting geosynchronous satellites enable a GPS tracking system to pinpoint the location of a range of objects and people, with accuracy to within a few feet. As with many technological developments, GPS tracking was first used by the military to find targets and to navigate. Recently, the cost of GPS systems has decreased significantly, and the military has suspended degradations to the signals, thereby making GPS tracking systems available for civilians to utilize.

GPS vehicle tracking systems have been invaluable to companies who need to keep track of their vehicle fleets, while simultaneously allowing their drivers to use the devices to make deliveries more efficiently, and allowing estimation of time of arrival. GPS vehicle tracking systems have also allowed delivery companies to determine the most efficient route for their drivers to take.

GPS Tracking

One of the negatives that has come about more recently is invasion of privacy. As these devices are used more and more frequently in our lives, they will continue to present these challenges. Truck drivers were among the first to be tracked and their movements are now analyzed as well. Spies have long known that GPS tracking can be very effective in tracking the movement of individuals.

GPS has also made significant inroads into the consumer market, allowing individuals to use GPS to lay out waypoints for hikes, set locations for camping or fishing, and allow individuals to navigate in unfamiliar territory. A new form of recreation called “geocaching” has also developed, involving a hide-and-seek game involving a container and a set of latitude and longitude coordinates.

GPS tracking systems have also allowed the development of a new automotive add-on, the in dash GPS receiver allowing consumers to request a location and have the device display or speak directions to the driver, making the paper map obsolete. These devices are already increasing in complexity and adding new features including hotel and restaurant information.

As the cost of GPS tracking systems decreases, it is predictable that their use will only increase. These systems are quite adaptable, and are sure to take the place of old-fashioned maps and guidebooks.