Database replication is the creation and maintenance of multiple copies of the same database. In most implementations of database replication, one database server maintains the master copy of the database and additional database servers maintain slave copies of the database. Database writes are sent to the master database server and are then replicated by the slave database servers. Database reads are divided among all of the database servers, which results in a large performance advantage due to load sharing. In addition, database replication can also improve availability because the slave Read More

A magnet is an object formed out of any type of material that can produce its own magnetic field. Such materials include hard magnets and soft magnets. Examples of hard magnets are neodymium magnets and refrigerator magnets which always remember the way in which they were magnetized.Examples of soft magnets are electromagnets, which can be switched on and off to change their magnetic characteristics. All magnets are ultimately magnetized by some kind of a motion of electric charge. Magnets become magnetic due to their atomic interactions with various outside forces, Read More

As the price of blank, burnable, DVDs has dropped over the past decade, the demand to learn how to burn a DVD has increased amongst computer users. Single-sided, single layered DVDs can now store 4.7 gigabytes (GB) of data, music, movies, or combination of the media types. If using a double sided, or dual layered disc, the capacity increases to 9.4 GB, and if using a dual layered, double sided disk it is 18.8 GB. As a result of the increased capacity, consumers can now store entire music libraries, multiple Read More

When companies and organizations wish to compile all of their customer or consumer information into one client, they use customer data integration software. Customer data integration software is used to integrate customer addresses, sales, demographics, customer needs, and features that would appeal to certain customers into one interface system so that the business entity can view all of this information at once in order to speed up production and make more sales. In this article, we will look at customer data integration software and various products available on the market. Read More

In most enterprise-level public key infrastructure systems, there is a dependence upon certificate chains to verify the identity of a party. When a Certificate Authority (CA) issues a certificate for any party, the legitimacy of that certificate authority must be verified. This is usually done by a higher certificate authority. This higher authority is part of a unique certification hierarchy which is eventually overseen by a root certificate. It is so called because it is the root of the certificate tree or the monarch of the certificate domain. If we Read More

Formatting a hard drive often becomes necessary when Trojans or viruses that are difficult to remove infect it or when there are bad sectors on it. A hard drive should be divided into small partitions to utilize the space effectively. A hard drive can also be formatted in order to reorganize the space available. Remember, formatting the hard drive or any of its partitions will completely erase all data. This article gives the steps to correctly go about the formatting exercise. Reformatting a Hard Drive with the Windows Installation Disk Read More

Facebook users have access to a wide variety of services and utilities. One of the readily available options is Facebook Chat. Chat on its own can be exciting, but it can be enhanced with a variety of emoticon codes that create simple graphical representations with the text based codes within the chat window. The official Facebook chat emoticons range from smile faces to sharks. To create a smile face emoticon, type in one of the following codes: 🙂 🙂 :] =) To create a grin face emoticon, type in one Read More

Napster was started as an alternative to using the Internet Relay Chat rooms, search engines like Lycos and other sources to efficiently share files such as MP3 and other sound formats. It served as a peer to peer network which normal people could use to perform the act of file transfers to and from other users. This service helped to start a new wave of piracy which was a first of its kind with such efficiency. This sharing of music became a big thing between college students and the younger crowds of people Read More

A Lithium Ion battery is a type of battery that is rechargeable and lasts longer than any other type of rechargeable battery currently on the market. Lithium Ion batteries are used for a wide variety of applications and are currently extremely popular due to their ability to be used in a wider range of temperatures than Nickel-Cadmium batteries and be charged more times. Lithium Ion batteries are used in digital devices and portable mechanical devices alike and can be charged over 1,000 times.   How Lithium Ion Batteries Work Lithium Read More

Inkjet printers are cheap but they are still expensive enough to make some repairs worthwhile. There is a surprising number of parts in them, and every part is a potential failure point. The most common failure is a clogged print head. They are notoriously difficult to clean because of their microscopic nozzles. The first attempt should be to use the self-cleaning command, found in the printer properties dialog. If that fails, the print head will need to be removed and wiped with alcohol. Both the contacts and nozzles should be Read More