Archive for the ‘Uncategorized’ Category
Suppose you Create a Cute Greeting Card for Your Mother
Posted by Parkzone Corsair in Uncategorized on March 6th, 2010
Templates are obviously very desirable features to have in your image editing software. The more of them you have to work with, the better.To see if your image-editing program offers a template for a particular project,search the Help database using a descriptive name for the project. For example, try “calendar” or “family tree.”
If you search the PhotoSuite Help database using the word “template,” you can view a list of all the available types of project templates included with the program.
Creating your own template requires saving a completed project to a file, and using that project as a starting point the next time you begin a similar one. This option works if you don’t have a template in your image-editing program for a particular project, or you don’t like the ones the manufacturer has included.
You can create a template simply by saving a completed project in a digital file format, such as JPEG, that allows you to modify it in the future. For example, suppose you create a cute greeting card for your mother, and a week later need to create one for your boss. Simply open the file in which you’ve saved mom’s card and modify the text and images as necessary to create a proper acknowledgment for your boss. You can open the file and modify it again and again in the future as the birthdays of other friends and family members come up.
About Hub Communications
Posted by Parkzone Corsair in Uncategorized on January 20th, 2010
A hub is an intelligent device that provides attachment points for devices and
manages each device’s connection to the bus. Devices that plug directly into the host computer connect to the system’s root hub. Other devices can connect to external hubs downstream from the root hub.
A hub manages power use, helps initiate communications with newly attached devices, and passes traffic up and down the bus. To manage power, a hub provides current to attached devices and limits current on detecting an over-current condition. To help initiate communications with devices, the hub detects and informs the host of newly attached devices and carries out requests that apply to the devices’ ports.
The hub’s role in passing traffic up and down the bus varies with the speeds of the host, device, and hubs between them. This chapter presents essentials about hub communications. You don’t need to know every detail about hubs in order to design a USB peripheral. But some understanding of what the hub does can help in understanding how devices are detected and communicate on the bus.
Ultimately To The Destination Computer
Posted by Parkzone Corsair in Uncategorized on November 20th, 2009
Images travel over the Internet much the same way as other types of email. When an email message is sent, regardless of whether it contains text or images, it’s broken up into packets of data. These data packets can be transmitted over telephone, cable, and other lines, and ultimately to the destination computer.
What happens next depends on whether you’re hooked up to a network of computers or a stand-alone PC. If your computer is part of a network, an internal routing device determines whether the email is addressed to someone on the same network as the sending computer. If the message is going to someone within a network, it’s delivered and the process is complete.
If your email is not part of a network or is going to another computer outside its own network, a device called an Internet router performs the complex process of locating and directing your message to the network the destination computer resides at.Once the Internet router directs your email to the appropriate destination network,you email might pass through both a gateway and a firewall. The gateway uses the TCP/IP protocol to reconstruct the data packets into a complete message.
A firewall is a type of security device that shields a network from the Internet so unwanted intruders can’t break in and cause damage. Occasionally, for security purposes, a firewall might be programmed so that no file attachments are allowed to pass through.For example, a network administrator might decide that image files have no legitimatebusiness purpose, and take up too much space on the company’s server.When someone sends you an email message, the message is seldom deliveredstraight to your computer. Instead, the message usually passes through a computer called an email server. The email software on your computer periodically logs into the email server and communicates with it to see if you have any mail.An Internet server might be programmed to reject email over a certain size, such as 1 megabyte, so the email server isn’t overtaxed. A megabyte is a lot of text—about a thousand pages of text like this page—but a single high-quality image might be as much as 1 megabyte.
