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GPS (Global Positioning Systems) are becoming the norm these days. They help cars and ships navigate on the surface of this lovely place we call Earth. Even car rental companies are installing GPS navigation systems in their cars to remain competitive. So for those who can’t seem to remember roads no matter how hard they try, this is great news. But perhaps you may be curious as to how the entire system works.

For GPS navigation to work, it has to complete 2 functions - (1) determine the location and (2) recommend directions. For the sake of simplicity, let’s just consider the sat nav on a car.

A GPS receiver is a passive tool that receives information from satellites in the sky. These satellites are at precise locations, and they send information about their location to the receivers. The two vital pieces of information are time and distance.

A receiver needs the information from at least 3 satellites before it can calculate its own position. This is called triangulation. It is obvious that the accuracy of the position depends on the accuracy of the information that is transmitted by the satellites. The more precise the information, the more accurate the position.

For this reason, sat nav systems can only work when communication between the receiver and the satellites is unblocked. That means the communication has to take place outdoors. Even then, the sky should be as clear as possible. Sat nav systems are known to produce calculation errors when deployed in forested areas.

In addition, some satellites are further away than others. The further away the satellite, the more inaccurate the calculations. Errors may also be introduced when signals are reflected by tall buildings or other objects. The good news is, modern technology has managed to limit such areas to somewhere between 10 to 20 meters.

Once the location has been accurately determined, the job of the satellites has been completed. It’s up to the receiver to relay important information to the driver now. And where is where product differentiation comes in. Not all receivers work in the same way. The better receivers, like the TomTom 530, has unique features that will help drivers navigate more easily.

For instance, the TomTom 530 as a unique feature known as IQ routing. IQ routing calculates the estimated time to travel from point A to point B based on realistic driving speed. Usually, the speed limit of the roads is used in such calculations. But such calculations are unrealistic because speeds are affected by road conditions. If speed limit is 70km/hr, but the realistic average speed is only 20km/hr, the TomTom 530 uses 20km/hr in its calculations. A driver may then easily see which are the fastest routes to take and make a decision easily.

On top of that, the TomTom 530 also offers advanced lane guidance using realistic graphic representations of lane junctions.

When you combine a feature rich receiver with satellite technology, the results can be surprisingly effective.

About the Author

Ian is the owner of Sat Nav Reviews. For more information on the TomTom 530 Sat Nav and other units, visit the site.

Continuation of Connect to Wireless Computer/Notebook Without Access Point Part I

3. We have finished to setup the first computer to connect to "ad hoc" or computer to computer network or what we call "peer to peer". The 3rd step is to do the same to the second computer what we have done to the first one. Remember that THEY MUST have the SAME SSID. If you failed to do that, you can’t connect those computer so it is important that they have same setting specially SSID, plus the data encryption  set to disabled. Once you have done this correctly, the two computer you want to connect should be already connected right now.

Nowadays, wireless has been common especially to our gadgets like notebook, mobile phone and many more! Of course, the wireless gadgets are useless if we can’t connect it to an ACCESS POINT or Router. But are you aware that we can connect two wireless computer without Access Point? Just like in wired connection, if we want to connect it without switch/hub we will just change the crimping orientation, we call it "crossover" in wired network, in wireless it is know  as "ad hoc".

CONNECT TWO WIRELESS COMPUTER WITHOUT ACCESS POINT

Here are the step by step on how to configure two wireless computer to connect and build a Wireless and build Wireless Network without Access Point (AP).

Wireless wireless wireless!!! In this computer age, having a notebook with you without a Wireless Lan is something unacceptable. Using of wireless connection for every gadget now has been so common and necessary, even our high end mobile phone , digital camera, projector, gaming console and mp3 are now has a capability to connect on wireless network and able to communicate directly on printer, desktop, media center and many more!!! But are you aware that using wireless LAN are too risky? The hacker may steal you identity and financial information. Securing you wireless connection are very very essential.

How Can You Secure Your Wireless Access Point or Router?

The schedule of the clash between VILLARREAL CF VS CELTIC FC is on September 30, 2008 and the kick-off starts 20:45. This two teams are both ranked number 1 based on Primera Division 2008/2009 and Premier League 2008/2009. These teams have an old score to settle, their last face off was April 14, 2004 on UEFA CUP in which Villarreal CF won 2-0 Against Celtic FC, and before that they score a draw (1-1) against each other last April 8, 2008. Many of soccer fans around the globe believe that it will be a good match as they strength and skills are almost identical. To give you an idea, here is the comparison between the two team.

Villarreal CF Matches

CBS TV Channel scheduled to broadcast the live match  BUFFALO BILLS vs ST. LOUIS RAMS at 4:05 PM EDT Sunday, September 28, 2008. The Buffalo Bills team comes from 3-0 winning streak while their opponent, St. Louis Rams was an opposite, came from 0-3 losing streak. Can the confidence of the team of Buffalo Bills will give them a plus to improve their standing as they are ranked number 1 at this moment or the St. Louis Rams team use this as a challenge and bring their A game to beat the currently ranked number one team which is Bufallo Bills to improve their standing to 1-3, watch out for this game as this game will be broadcast by CBS TV Channel live!

Manchester United and Bolton Wanderer are scheduled to kick-off on September 27, 15:00 BST in Old Trafford, Manchester. Who do you think will win in this match, is it the MANCHESTER UNITED  or the BOLTON WANDERER. This game match will be almost do or die for both of the team, Manchester United and Bolton Wanderer really need a WIN to improve their team standing as they are at the bottom of the team standing.

This game match is available for Online Streaming Live, you can watch it directly from your computer or notebook, if you are already on the online streaming of sports matches live, just tune in on the following streaming channels: Setanta Sports Canada, Setanta Sports USA.

Nowadays Internet has been giving us the big impact the way we leave, it seems a day is incomplete If we cannot access internet for any purposes, almost everything is possible in the Internet, we can pay via online payment, internet banking, we can purchase almost anything via ebay and any online markets, we can listen to the radio, we can read news and even STREAM movies and LIVE SPORTS via ONLINE VIDEO STREAMING FOR FREE.

This morning when I am trying to look some useful information to discuss with, I have found a website that offer some script to run to be able to VIEW Privates Profile Photo. Unlike my previous post of how to view private folder photo on friendster, this is much much easier than that. All you have to do is know the Friendster UID of your target and paste on that site and all of the photo PUBLIC and PRIVATE photo will popup on windows in just one click, I tested it on my own account and it is working and found it very useful. Before you access the site, please read the DISCLAIMER.

Sometimes when your antivirus softwares is not updated, virus may infect your computer without your knowledge and you will just notice the abnormal slowing down of your operating system performance. Many of antivirus can not remove the virus from you system if you are already infected even you update your antivirus software as the antivirus detects that it as part of your system, so you have no choice but to remove the virus manually.

Here are the instructions on how to remove the virus manually, specifically for Microsoft Windows operating systems.

• Download HIJACKTHIS program, this is a small utility program that use to discover every program that is running in your computer, you can just google it, it is available in many download sites such download.com, soft32 and other download sites and its free.