Thursday, May 20, 2010

Watch television TV channels live from home

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Watch TV stations online from home. All you need is our Internet TV software, your PC, and Internet connection.

Sunday, May 16, 2010

3D computer graphics



3D computer graphics (in contrast to 2D computer graphics) are graphics that utilize a three-dimensional representation of geometric data that is stored in the computer for the purposes of performing calculations and rendering 2D images.
Such images may be for later display or for real-time viewing.

Despite these differences, 3D computer graphics rely on many of the same algorithms as 2D computer vector graphics in the wire frame model and 2D computer raster graphics in the final rendered display.

In computer graphics software, the distinction between 2D and 3D is occasionally blurred; 2D applications may use 3D techniques to achieve effects such as lighting, and primarily 3D may use 2D rendering techniques.

3D computer graphics are often referred to as 3D models.

Apart from the rendered graphic, the model is contained within the graphical data file.

However, there are differences.

A 3D model is the mathematical representation of any three-dimensional object (either inanimate or living).

A model is not technically a graphic until it is visually displayed.

Due to 3D printing, 3D models are not confined to virtual space.

A model can be displayed visually as a two-dimensional image through a process called 3D rendering, or used in non-graphical computer simulations and calculations..

Friday, May 14, 2010

How to Enable JavaScript on a Mac



you use Apple's Safari or Mozilla's Firefox web browser on your Mac computer, you can enable JavaScript to allow dynamic websites to display properly. In both browsers, the JavaScript settings are configured in the Preferences window. You can be either an administrator or a standard user on your computer to enable JavaScript.
Instructions-------------------------------------------------

Step 1

Open the Safari application by clicking on the icon in the Dock.

Step 2

Go to the "Safari" menu at the top and select "Preferences."

Step 3

Click on the "Security" tab at the top of the Preferences window.

Step 4

Check the box next to "Enable JavaScript."

Step 5

Close the Preferences window to save the settings.
Firefox Instructions

Step 1

Open the Firefox application by clicking on the icon in the Dock.

Step 2

Go to the "Firefox" menu at the top and select "Preferences."

Step 3

Go to the "Content" tab at the top of the Preferences window.

Step 4

Check the box next to "Enable JavaScript."

Step 5

Close the Preferences window to save the settings.

Things You'll Need:

1 Mac running OS X 10.4 or later

How to Send & Receive Text Messages on Your Computer



Google Chat and AOL Instant Messenger (AIM) allow users to communicate via instant message over the Internet. They also allow users to send text and receive text messages for free. Text messages can be sent to cell phones free of charge directly from your email account. Sending a text message using an instant messaging or email service is much more convenient than typing on a cell phone and allows users to avoid incurring text messaging fees from their cell phone providers.
Instructions
Things You'll Need:

1 Computer
2Internet connection
3 Instant messenger software
4 Instant messenger account

AOL Instant Messenger

Step 1

Download and install the AOL Instant Messenger software from the link in References. Open the program and sign into your account. If you do not have an account, you can register for one from the log-in window by clicking on the option to create an account and then following the account creation instructions. Alternatively, you can log in using your Facebook log-in information.

Step 2

Click "IM" in the "Buddy List" window to open a new instant message.

Step 3

Enter "+1" followed by receiver's telephone number, including area code, in the "To:" field. For example, if you would like to send a text to the number "555-444-3333," you would enter "+15554443333," omitting any extra characters from the phone number, such as hyphens.

Step 4

Enter your message in the body of the instant message and then click "Send." When the recipient responds, her message will be displayed in the same instant messaging window that was used to send the message. You can continue to reply to and receive messages using the instant messaging window.
Google Talk

Step 1

Log in to your Gmail account with your Google account credentials. If you do not have an account, click the "Create an Account" below the log-in box to create one for free.

Step 2

Click "Settings" in the top-right corner and then click on the "Labs" tab.

Step 3

Scroll down to the item marked "Text Messaging (SMS) in Chat" and select "Enable." Click "Save Changes" at the bottom of the window to return to Gmail.

Step 4

Enter the telephone number, including area code, into the chat search box on the left side of the window. Click "Send SMS." Enter the name of the contact and click "Save." A chat box will appear at the bottom right of the screen.

Step 5

Enter your message in the chat box and press the "Enter" or "Return" key. The text message will be delivered to the cell phone. The recipient can reply to the message, and replies will be displayed in the chat box.
Text via Email

Step 1

Log in to your email program and compose a new message.

Step 2

Locate the recipient's text message email address by using the carrier email extension list provided on Topbits.com using the link in References. The email address will always be the person's 10-digit phone number followed by the email extension. For example, the phone number 555-111-2222 on the AT&T network would have an email address of "5551112222@txt.att.net."

Step 3

Fill in the Subject field and enter your message in the body of the email window.

Step 4

Click "Send." The user can reply directly to the text message, and his reply will be delivered to your email account.

How to Block Websites Using Linksys



routers include a back-end system that allows administrators to monitor and secure their network. One option allows the administrator to block certain websites from being accessed by computers on the network. The administrator can choose to block all computers or specific computers from accessing specified websites.
Instructions
Things You'll Need:

1 Linksys router
2 Computer
3 Ethernet cable


Step 1

Plug the computer into the router using the Ethernet cable. The Ethernet cable should be plugged into one of the output Ethernet ports on the rear of the router (typically labeled 1 through 4) and into the Ethernet port on the computer.

Step 2

Open your Web browser and enter "192.168.1.1" into the address bar and press "Enter."

Step 3

Enter "admin" as the password and leave the username field blank. These are the default access settings. Click "OK" to connect to the router. If you have previously changed your user name and password, enter your pre-defined credentials instead of the defaults.

Step 4

Write down the numbers contained in the "Starting IP Address" and "Maximum Number of DHCP Users" fields. The "Maximum Number of DHCP Users" refers to the number of users permitted to be connect to the router at once.

Step 5

Click on the "Access Restrictions" tab at the top of the window.
Step 6

Select an unused "Internet Access Policy," set the status to "Enable," enter a name for your policy and then click "Edit List of PCs."

Step 7

Enter the "Starting IP Address" in the left box beside "IP Range 01:" at the bottom of the window. Add the number contained in the "Maximum Number of DHCP Users" to the "Starting IP Address" and enter the result into the box on the right side. For instance, if your "Starting IP Address" is 100 and your "Maximum Number of DHCP Users" is 10, you would enter "100" in the left box and "110" in the right box. Click "Save Settings" and close the window.

Step 8

Choose "None" from the "Blocked Services" drop-down boxes.

Step 9

Enter the URL of the website that you would like to block in the "Website Blocking by URL Address" field. Alternatively, you can enter a keyword to block in the "Website Blocking by Keyword" field. For instance, you may enter "http://www.examplewebsite.com" in the "Website Blocking by URL Address" field or you may enter "examplewebsite" in the "Website Blocking by Keyword" field. Click "Save Settings" to enable the restrictions and close the page.

How to Build a Home Video Security System With your computer



As the cost for video surveillance equipment continues to tumble, making DIY surveillance more accessible for more budgets, and as the technology becomes more user-friendly, many homeowners are opting to put together a video security system they can operate from a home desktop computer. There are two approaches to this project: using wired or wireless camera methods.
Instructions---------------------------------------------
With Wireless Cameras

Step 1

Purchase a wireless surveillance camera that comes with a receiver module. You can also purchase multiple-camera sets tuned to work with a single receiver on the proper radio frequencies. If you buy separate cameras, each with their own receiver module, you may need to manually tune each camera so they will not experience radio frequency conflicts. Multi-camera bundles generally require no complicated manually tuning.

Step 2

Install the wireless cameras in the proper locations, screwing the bases to a stable surface if possible. Plug the wireless camera into a power source using the special AC adapter, which will come with the camera for this purpose. A standard wireless camera AC adapter cable will be about 3-feet long. Use a standard power extension cord to extend the "reach" of the AC adapter block to the nearest power outlet.

Step 3

Plug the video camera receiver unit into a power outlet near your computer. Connect the receiver to your computer using the adapter included in the package: the type of connection used will depend on the make and model of your camera system. How the video images are then displayed on your computer, or how they may be recorded to your hard drive, will be determined by the make and model of the wireless system.

Step 4

Tweak your wireless cameras as necessary. Because wireless cameras use a UHF radio frequency to send images from the camera to the receiver box they are prone to some reception problems, especially when used around cordless telephones, wireless intercoms, some cell phones and devices that use a lot of electricity. Adjust your camera placement so it has a "clearer shot" to the receiver box if you experience fuzzy or "rolling" picture from a wireless camera.
With Hard Wired Cameras

Step 1

Purchase a video "splitter" or "multiplexing" PC card for your desktop computer. This is a video card that offers a port, or several ports, for connecting hard-wired video surveillance cameras directly to your computer. Video camera PC cards can be purchased separately or bundled with the video cameras intended for this use. Most bundled packages will come with software that will split your computer monitor into the appropriate sections to make it possible to view multiple cameras,
Step 2

Install the video card in your machine. Unplug all the rear cables and open the side cover to your computer. Locate an open PC expansion slot and remove the screw holding the slot cover. Remove the metal slot cover and discard it. Insert the new video card into the slot. Reinstall the screw to hold the video card to the chassis frame. Re-cable and start your computer.

Step 3

Install the drivers and any software package that came with the add-on video card. Insert the Set Up disc in your CD or DVD drive and start the Set Up program. The program will walk you through the installation of the drivers and any software. Reboot your computer when this Set Up is complete.

Step 4

Install the hard-wired video cameras in chosen locations. Screw the camera bases to stable surfaces if possible. Most hard-wired cameras derive power from the cable connection and won't need to be plugged into a power outlet. Some cameras, however, may indeed need to be plugged in to a wall outlet however. Access to power outlets, particularly in outdoor or remote camera locations, is a consideration when buying surveillance cameras. Look for cameras that do not require direct power if this may be a problem.

Step 5

Connect one end of the video feed cable to the camera and run it back to your computer. If the cameras have an "on" switch, turn the cameras on before leaving the camera location. Most surveillance camera bundles come with 50-foot, 100-foot or 200 foot cables, but you can also purchase longer cables if necessary. Plug the other end of the camera cable into the port on your video add-on card. Repeat this for any other cameras.

Step 6

Start your video surveillance software program and evaluate the images the cameras should now be sending to your PC. You may want to tweak or adjust the cameras so they pick up the proper view.

Step 7

Set up any image recording program that may come with your bundle package. This makes it possible to use your computer like a DVR and record images directly to your hard drive. Most surveillance DVR modules can be adjusted to record continuously or only when motion in front of the camera trips the camera sensors.

How to Secure PC on Wireless



Running a wireless Internet or network connection on your PC without a password is a risky endeavor. While it may be more convenient to not have to log on to your own network with a password, it enables anyone passing by your home or office access to your network as well. If you want to secure your PC's wireless connection, you will have to go into your router's "Settings" utility and turn on the appropriate encryption methods.
Instructions---------------------------------------------

Step 1

Open your Web browser.

Step 2

Type your router's IP address into the address bar and hit "Enter." The IP address for your router will be listed in the users manual that you received when you purchased the device.

Step 3

Log in to your router using the user name and password that specified the first time you setup the device to create your network.

Step 4

Click "Security."

Step 5

Select the type of encryption you'd like to use to secure your wireless network from the drop down menu, and then enter a password. Once finished, click "Save" to secure your PC's wireless