multimedia

Multimedia is media and content that uses a combination of different media. Multimedia includes a combination of text, audio, still images, animation, video, and interactivity content forms.

Multimedia is usually recorded and played, displayed or accessed by information content processing devices, such as computerized and electronic devices, but can also be part of a live performance.  The term "rich media" is synonymous for interactive multimedia. Hypermedia can be considered one particular multimedia application.

Multimedia may be broadly divided into linear and non-linear categories. Linear active content progresses without any navigational control for the viewer such as a cinema presentation. Non-linear content offers user interactivity to control progress as used with a computer game or used in self-paced computer based training. Hypermedia is an example of non-linear content.

Major characteristics of multimedia

Multimedia presentations may be viewed in person on stage, projected, transmitted, or played locally with a media player. A broadcast may be a live or recorded multimedia presentation. Broadcasts and recordings can be either analog or digital electronic media technology. Digital online multimedia may be downloaded or streamed. Streaming multimedia may be live or on-demand.

Multimedia games and simulations may be used in a physical environment with special effects, with multiple users in an online network, or locally with an offline computer, game system, or simulator.

The various formats of technological or digital multimedia may be intended to enhance the users' experience, for example to make it easier and faster to convey information. Or in entertainment or art, to transcend everyday experience.

The term "multimedia" was coined by Bob Goldstein.

Usage

Multimedia finds its application in various areas including, but not limited to, advertisements, art, education, entertainment, engineering, medicine, mathematics, business, scientific research and spatial temporal applications. Several examples are as follows:

• Creative industries

Creative industries use multimedia for a variety of purposes ranging from fine arts, to entertainment, to commercial art, to journalism, to media and software services provided for any of the industries listed below. An individual multimedia designer may cover the spectrum throughout their career. Request for their skills range from technical, to analytical, to creative.

•  Commercial

Much of the electronic old and new media used by commercial artists is multimedia. Exciting presentations are used to grab and keep attention in advertising. Business to business, and interoffice communications are often developed by creative services firms for advanced multimedia presentations beyond simple slide shows to sell ideas or liven-up training. Commercial multimedia developers may be hired to design for governmental services and nonprofit services applications as well.

• Entertainment and fine arts

In addition, multimedia is heavily used in the entertainment industry, especially to develop special effects in movies and animations. Multimedia games are a popular pastime and are software programs available either as CD-ROMs or online. Some video games also use multimedia features. Multimedia applications that allow users to actively participate instead of just sitting by as passive recipients of information are called Interactive Multimedia. In the Arts there are multimedia artists, whose minds are able to blend techniques using different media that in some way incorporates interaction with the viewer. One of the most relevant could be Peter Greenaway who is melding Cinema with Opera and all sorts of digital media. Another approach entails the creation of multimedia that can be displayed in a traditional fine arts arena, such as an art gallery. Although multimedia display material may be volatile, the survivability of the content is as strong as any traditional media. Digital recording material may be just as durable and infinitely reproducible with perfect copies every time.

• Education

In Education, multimedia is used to produce computer-based training courses (popularly called CBTs) and reference books like encyclopedia and almanacs. A CBT lets the user go through a series of presentations, text about a particular topic, and associated illustrations in various information formats. Edutainment is an informal term used to describe combining education with entertainment, especially multimedia entertainment.

Learning theory in the past decade has expanded dramatically because of the introduction of multimedia. Several lines of research have evolved. The possibilities for learning and instruction are nearly endless.

The idea of media convergence is also becoming a major factor in education, particularly higher education. Defined as separate technologies such as voice (and telephony features), data (and productivity applications) and video that now share resources and interact with each other, synergistically creating new efficiencies, media convergence is rapidly changing the curriculum in universities all over the world. Likewise, it is changing the availibility, or lack thereof, of jobs requiring this savvy technological skill.

Newspaper companies all over are also trying to embrace the new phenomenon by implementing it's practices in their work.

• Engineering

Software engineers may use multimedia in Computer Simulations for anything from entertainment to training such as military or industrial training. Multimedia for software interfaces are often done as a collaboration between creative professionals and software engineers.

• Industry

In the Industrial sector, multimedia is used as a way to help present information to shareholders, superiors and coworkers. Multimedia is also helpful for providing employee training, advertising and selling products all over the world via virtually unlimited web-based technology

• Mathematical and scientific research

In mathematical and scientific research, multimedia is mainly used for modelling and simulation. For example, a scientist can look at a molecular model of a particular substance and manipulate it to arrive at a new substance. Representative research can be found in journals such as the Journal of Multimedia.

• Medicine

In Medicine, doctors can get trained by looking at a virtual surgery or they can simulate how the human body is affected by diseases spread by viruses and bacteria and then develop techniques to prevent it.

• Document Imaging

Document Imaging is a technique that takes hard copy of an image/document and converts it into a digital format

HD Radio

It’s the most significant advancement in radio broadcasting since the introduction of FM stereo more than 50 years ago. HD Radio technology enables AM and FM radio stations to broadcast their programs digitally – a tremendous technological leap from the analog broadcasts of the past.

HD radio works on a technology that splits the radio signal into analog and digital channels and then transmit it over the existing AM/FM bands. It’s a process known as In-Band On-Channel (IBOC) Broadcasting. It’s DIGITAL, and it’s FREE.

Basically, digital radio works the same as conventional radio. There’s a signal on one end and a receiver on the other. But there are a few key differences.

 

1. Instead of sending out one analog signal, stations send out a bundled signal – both analog and digital. Because it is digital, textual data such as traffic, stock info and song titles can be sent out, as well.
2.  The digital signal layer is compressed.
3.  The combined analog and digital signals are transmitted.
4.  Inevitably, radio signals bounce off objects, causing what is called multipath distortions. This is what causes the static in conventional radio receivers. HD Digital radio receivers are designed to sort through reflected signals, reducing static, hiss, pops and fades.
5.  Finally, the signals reach their destination. Both broadcasts are free, with no subscription fee. To hear the digital broadcast, all you need is an HD Radio receiver.

Features for the listener:

 

  

• FM stations now with CD-quality sound
• AM stations now with FM-quality sound
• Crystal-clear reception with no audio distortion
• New channels to play more of what you like to hear
• All digital, all the time
• No hiss, distortion or station drop off
• Reception is free, with no subscription costsMore talk and music from the stations you’re plugged into
• More complete sets and more full albums
• More in-depth interviews
• More lengthy talk and more detailed news
• Receives and plays digital HD2 Multicast programming
• Available in tabletop systems and shelf units
• Also available in car and marine stereo units

Assignment III

Submit the assignment on/before 25th March 2010.

Expand the following abbrevations:

1. ISDN
2. DSL
3. TCP/IP
4. HTML
5. HTTP
6. CTI
7. LAN,WLAN,MAN
8. SNS
9. MPEG
10. BMP
11. JPEG
12. MP3

Assignment II

Complete the following assignment and submit on/before 22nd March 2010:

1. Write the names of any 10 popular SNS and the country of its origin.
2. Write the names of any five Indian SNS.
3. List down the 5 popular uses of Multimedia at (a) Home, (b) in Business, (c) in Entertainment.

Telephony

In telecommunication, telephony encompasses the general use of equipment to provide voice communication over distances, specifically by connecting telephones to each other.

Telephones were originally connected directly together in pairs. Each user had separate telephones wired to the various places he might wish to reach. This became inconvenient when people wanted to talk to many other telephones, so the telephone exchange was invented. Each telephone could then be connected to other local ones, thus inventing the local loop and the telephone call. Soon, nearby exchanges were connected by trunk lines, and eventually distant ones were as well.

In modern times, most telephones are plugged into telephone jacks. The jacks are connected by inside wiring to a drop wire which connects the building to a cable. Cables usually bring a large number of drop wires from all over a district access network to one wire center or telephone exchange. When the user of a telephone wants to make a telephone call, equipment at the exchange examines the dialed telephone number and connects that telephone line to another in the same wire center, or to a trunk to a distant exchange. Most of the exchanges in the world are connected to each other, forming the public switched telephone network (PSTN). By the end of the 20th century almost all were Stored Program Control exchanges.

After the middle 20th century fax and data became important secondary users of the network created to carry voices, and late in the century parts of the network were upgraded with ISDN and DSL to improve handling of such traffic.

Digital telephony is the use of digital technology in the provision of telephone services and systems. Almost all telephone calls are provided this way, but sometimes the term is restricted to cases in which the last mile is digital, or where the conversion between digital and analog signals takes place inside the telephone. Telephony was digitized to cut the cost and improve the quality of voice services, but digital telephony was then found useful for new network services (ISDN) to transfer data speedily over telephone lines.

IP telephony is a modern form of telephony which uses the TCP/IP protocol popularized by the Internet to transmit digitized voice data. Contrast this with the operation of POTS (an acronym for "plain old telephone service").

Computer telephony integration (CTI) enables computers to know about and control phone functions such as making and receiving voice, fax, and data calls with telephone directory services and caller identification. The integration of telephone software and computer systems is a major development in the evolution of the automated office.

CTI is not a new concept. Such links have been used in the past in large telephone networks but only dedicated call centers could justify the costs of the required equipment installation. Primary telephone service providers are offering information services such as automatic number identification (ANI) and Dialed Number Identification Service (DNIS) on a scale wide enough for its implementation to bring real value to business or residential telephone usage. A new generation of applications (middleware) is being developed as a result of standardization and availability of low cost computer telephony links.

Fundamental Computer Networks Concepts

In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a combination of computer hardware and computer software.

Types of Computer Networks

Networks can be categorized in several different ways. One method defines the type of a network according to the geographic area it spans. Alternatively, networks can also be classified based on topology or on the types of protocols they support.

One way to categorize the different types of computer network designs is by their scope or scale. For historical reasons, the networking industry refers to nearly every type of design as some kind of area network. Common examples of area network types are:

• LAN - Local Area Network
• WLAN - Wireless Local Area Network
• WAN - Wide Area Network
• MAN - Metropolitan Area Network
• SAN - Storage Area Network, System Area Network, Server Area Network, or sometimes Small Area Network
• CAN - Campus Area Network, Controller Area Network, or sometimes Cluster Area Network
• PAN - Personal Area Network
• DAN - Desk Area Network

The building blocks of a home computer network include adapters, routers and/or access points. Wired (and hybrid wired/wireless) networking also involves cables of varying types. Finally, large-scale enterprise networks in particular often employ other advanced equipment for specialized communication purposes.

Ethernet is a physical and data link layer technology for local area networks. Homes, schools and offices around the world all commonly use Ethernet standard cables and adapters to network personal computers.

Wi-Fi is the most popular wireless communication protocol for local area networks. Private home and business networks, and public hotspots, use Wi-Fi to networks computers and other wireless devices to each other and the Internet. Bluetooth is another wireless protocol commonly used in cellular phones and computer peripherals for short range network communication.

The technologies used to connect to the Internet are different than those used for connecting devices on local area network. DSL, cable modem and fiber provide fixed broadband Internet service, while WiMax and LTE additionally support mobile connectivity. In geographic areas where these high-speed options are unavailable, subscribers are forced to use older cellular services, satellite or even dial-up Internet instead.

Network Design

Computer networks also differ in their design. The two types of high-level network design are called client-server and peer-to-peer. Client-server networks feature centralized server computers that store email, Web pages, files and or applications. On a peer-to-peer network, conversely, all computers tend to support the same functions. Client-server networks are much more common in business and peer-to-peer networks much more common in homes.

A network topology represents its layout or structure from the point of view of data flow. In so-called bus networks, for example, all of the computers share and communicate across one common conduit, whereas in a star network, all data flows through one centralized device. Common types of network topologies include bus, star, ring and mesh.

Network Protocols

In networking, the communication language used by computer devices is called the protocol. Yet another way to classify computer networks is by the set of protocols they support. Networks often implement multiple protocols to support specific applications. Popular protocols include TCP/IP, the most common protocol found on the Internet and in home networks.

Technology of Networks - Wireless

Benefits of Networking

The benefits of networking (either wired or wireless) in homes are:

• 
  
  file sharing - Network file sharing between computers gives you more flexibity than using floppy drives or Zip drives. Not only can you share photos, music files, and documents, you can also use a home network to save copies of all of your important data on a different computer. Backups are one of the most critical yet overlooked tasks in home networking.
• 
  
  printer / peripheral sharing - Once a home network is in place, it's easy to then set up all of the computers to share a single printer. No longer will you need to bounce from one system or another just to print out an email message. Other computer peripherals can be shared similarly such as network scanners, Web cams, and CD burners.
• 
  
  Internet connection sharing - Using a home network, multiple family members can access the Internet simultaneously without having to pay an ISP for multiple accounts. You will notice the Internet connection slows down when several people share it, but broadband Internet can handle the extra load with little trouble. Sharing dial-up Internet connections works, too. Painfully slow sometimes, you will still appreciate having shared dial-up on those occasions you really need it.
• 
  
  multi-player games - Many popular home computer games support LAN mode where friends and family can play together, if they have their computers networked.
• 
  
  Internet telephone service - So-called Voice over IP (VoIP) services allow you to make and receive phone calls through your home network across the Internet, saving you money.
• 
  
  home entertainment - Newer home entertainment products such as digital video recorders (DVRs) and video game consoles now support either wired or wireless home networking. Having these products integrated into your network enables online Internet gaming, video sharing and other advanced features.

Advantages of a wireless home network instead:

1. Computer mobility. Notebook computers and other portable devices are much affordable than they were a few years ago. With a mobile computer and wireless home network, you aren't chained to a network cord and can work on the couch, on your porch, or wherever in the house is most convenient at the moment.

2. No unsightly wires. Businesses can afford to lay cable under their floors or inside walls. But most of us don't have the time or inclination to fuss with this in our home. Unless you own one of the few newer homes pre-wired with network cable, you'll save substantial time and energy avoiding the cabling mess and going wireless.

3. Wireless is the future. Wireless technology is clearly the future of networking. In building a wireless home network, you'll learn about the technology and be able to teach your friends and relatives. You'll also be better prepared for future advances in network technology coming in the future.

Wireless networking represent the future of computer and Internet connectivity worldwide. Wi-Fi continues to be the pre-eminent technology for building general-purpose wireless networks.

Wireless Networks

Wireless networks utilize radio waves and/or microwaves to maintain communication channels between computers. Wireless networking is a more modern alternative to wired networking that relies on copper and/or fiber optic cabling between network devices.

A wireless network offers advantages and disadvantages compared to a wired network. Advantages of wireless include mobility and elimination of unsightly cables. Disadvantages of wireless include the potential for radio interference due to weather, other wireless devices, or obstructions like walls.

Wireless is rapidly gaining in popularity for both home and business networking. Wireless technology continues to improve, and the cost of wireless products continues to decrease. Popular wireless local area networking (WLAN) products conform to the 802.11 "Wi-Fi" standards. The gear a person needs to build wireless networks includes network adapters (NICs), access points (APs), and routers.

MySpace

MySpace is a social networking website. Its headquarters are in Beverly Hills, California, US, where it shares an office building with its immediate owner, Fox Interactive Media, owned by News Corporation. MySpace became the most popular social networking site in the United States in June 2006. According to comScore, MySpace was overtaken internationally by its main competitor, Facebook, in April 2008, based on monthly unique visitors. MySpace employs 1,000 employees, after laying off 30% of its workforce in June 2009; the company does not disclose revenues or profits separately from News Corporation. The 100 millionth account was created on August 9, 2006, in the Netherlands.

MySpace operates solely on revenues generated by advertising as its user model possesses no paid-for features for the end user. Through its Web site and affiliated ad networks, MySpace is second only to Yahoo! in its capacity to collect data about its users and thus in its ability to use behavioral targeting to select the ads each visitor sees.

On August 8, 2006, search engine Google signed a $900 million deal to provide a Google search facility and advertising on MySpace. MySpace has proven to be a windfall for many smaller companies that provide widgets or accessories to the social networking giant. Companies such as Slide.com, RockYou!, and YouTube were all launched on MySpace as widgets providing additional functionality to the site. Other sites created layouts to personalize the site and made hundreds of thousands of dollars for its owners most of whom were in their late teens and early twenties.

In November 2008, MySpace announced that user-uploaded content that infringed on copyrights held by MTV and its subsidiary networks would be redistributed with advertisements that would generate revenue for the companies.

Despite losing popularity to Facebook & Twitter in recent months, Rupert Murdoch has no plans to sell off MySpace, nor buy out Twitter. Murdoch gave the site his personal support, while feeling that Twitter has yet to find a way to make money on its own. However, in 2009, Myspace also added a new status update feature. If a Myspace user has a Twitter account, the tweet will also update the Myspace status. (Facebook also has a similar feature.) It does, however, require that the two accounts to be synched up together.

Contents of a MySpace profile

 

Moods

Moods are small emoticons that are used to depict a mood the user is in. The feature was added in July 2007.

Blurbs, blogs, multimedia

Profiles contain two standard "blurbs": "About Me" and "Who I'd Like to Meet" sections. Profiles also contain an "Interests" section and a "Details" section. In the "Details" section, "Status" and "Zodiac Sign" fields will always display. However, fields in these sections will not be displayed if members do not fill them in. Profiles also contain a blog with standard fields for content, emotion, and media. MySpace also supports uploading images. One of the images can be chosen to be the "default image", the image that will be seen on the profile's main page, search page, and as the image that will appear to the side of the user's name on comments, messages, etc. A photo editor powered by Fotoflexer is available which can not only crop images and adjust contrast but also convert the image to a cartoon or a line drawing made with neon lights, or put the user's face in a photo of a $100 bill. Flash, such as on MySpace's video service, can be embedded. Blogging features are also available.

Comments

Below the User's Friends Space (by default) is the "comments" section, wherein the user's friends may leave comments for all viewers to read. MySpace users have the option to delete any comment and/or require all comments to be approved before posting. If a user's account is deleted, every comment left on other profiles by that user will be deleted, and replaced with the comment saying "This Profile No Longer Exists."

Profile customization (HTML)

MySpace allows users to customize their user profile pages by entering HTML (but not JavaScript) into such areas as "About Me," "I'd Like to Meet," and "Interests." Videos and flash-based content can be included this way. Users also have the option to add music to their profile pages via MySpace Music, a service that allows bands to post songs for use on MySpace.

A user can also change the general appearance of his or her page by entering CSS (in a element) into one of these fields to override the page's default style sheet using MySpace editors. This is often used to tweak fonts and colors. The fact that the user-added CSS is located in the middle of the page (rather than being located in the element) means that the page will begin to load with the default MySpace layout before abruptly changing to the custom layout. A special type of modification is a div overlay, where the default layout is dramatically changed by hiding default text with

There are several independent web sites offering MySpace layout design utilities which let a user select options and preview what their page will look like with them.

MySpace has recently added its own "Profile Customizer" to the site, allowing users to change their profile through MySpace. Using this feature bypasses the CSS loading delay issue, as the MySpace default code is changed for the customized profile. The MySpace profile editor also has a criticism with how the links appear on the profile.

Music

Wikinews has related news: MySpace to take on iTunes

MySpace profiles for musicians in the website's MySpace Music section differ from normal profiles in allowing artists to upload their entire discographies consisting of MP3 songs. The uploader must have rights to use the songs (e.g. their own work, permission granted, etc). Unsigned musicians can use MySpace to post and sell music using SNOCAP, which has proven popular among MySpace users.

Shortly after MySpace was sold to Rupert Murdoch, the owner of Fox news and 20th Century Fox, in 2005 they launched their own record label, MySpace Records, in an effort to discover unknown talent currently on MySpace Music. Regardless of the artist already being famous or still looking for a break into the industry, artists can upload their songs onto MySpace and have access to millions of people on a daily basis. Some well known singers such as Lily Allen and Sean Kingston gained fame through MySpace. The availability of music on this website continues to develop, largely driven by young talent. Over eight million artists have been discovered by MySpace and many more continue to be discovered daily.

MySpace has recently redesigned its music page adding new features for all musicians. These new features include the users' ability to create playlists, resembling the functions of Last.fm and other social music websites, along with the popular ProjectPlaylist that is popular on profiles. The new music features also archive songs from many popular artists, resembling the services of iTunes and Napster.

In late 2007, the site launched The MySpace Transmissions, a series of live-in-studio recordings by well-known artists.

MySpace features

Bulletins

Bulletins are posts that are posted on to a "bulletin board" for everyone on a MySpace user's friends list to see. Bulletins can be useful for contacting an entire friends list without resorting to messaging users individually. Some users choose to use Bulletins as a service for delivering chain messages about politics, religion, or anything else and sometimes these chain messages are considered threatening to the users, especially the ones that mention bad luck, death, or topics similar to that. They have also become the primary attack point for phishing. Bulletins are deleted after ten days.

Groups

MySpace has a Groups feature which allows a group of users to share a common page and message board. Groups can be created by anybody, and the moderator of the group can choose for anyone to join, or to approve or deny requests to join.

MySpaceIM

In early 2006, MySpace introduced MySpaceIM, an instant messenger that uses one's MySpace account as a screen name. A MySpace user logs in to the client using the same e-mail associated with his or her MySpace account. Unlike other parts of MySpace, MySpaceIM is stand-alone software for Microsoft Windows. Users who use MySpaceIM get instant notification of new MySpace messages, friend requests, and comments.

MySpaceTV

In early 2007, MySpace introduced MySpaceTV, a service similar to the YouTube video sharing website. MySpaceTV is now in beta mode, and will probably be launched as a separate site in either 2008 or early 2009. MySpaceTV might be a standard channel that will be shown on television.

Applications

In 2008, MySpace introduced an API with which users could create applications for other users to post on their profiles. The applications are similar to the Facebook applications. In May 2008, MySpace had added some security options regarding interaction with photos and other media.

MySpace Mobile

There are a variety of environments in which users can access MySpace content on their mobile phone. American mobile phone provider Helio released a series of mobile phones in early 2006 that can utilize a service known as MySpace Mobile to access and edit one's profile and communicate with, and view the profiles of, other members. Additionally, UIEvolution and MySpace developed a mobile version of MySpace for a wider range of carriers, including AT&T, Vodafone and Rogers Wireless.

MySpace News

In the month of April 2007, MySpace launched a news service called MySpace News which displays news from RSS feeds that users submit. It also allows users to rank each news story by voting for it. The more votes a story gets, the higher the story moves up the page.

MySpace Classifieds

Full service classifieds listing offered beginning in August 2006. It has grown by 33 percent in one year since inception. MySpace Classifieds was launched right at the same time the site appeared on the internet.

MySpace Karaoke

Launched April 29, 2008, ksolo.myspace.com is a combination of MySpace and kSolo, which allows users to upload audio recordings of themselves singing onto their profile page. Users' friends are able to rate the performances. A video feature is not yet available, but Tom Anderson, MySpace co-founder and president, states that it is in the works.

MySpace Polls

MySpace Polls is a feature on MySpace that was brought back in 2008 to enable users to post polls on their profile and share them with other users.

MySpace forums

MySpace uses an implementation of Telligent Community for its forum system.

tags and large images.

FACEBOOK

Facebook is a social networking website that is operated and privately owned by Facebook, Inc. Since September 2006, anyone over the age of 13 with a valid e-mail address (and not residing in one of the countries where it is banned) can become a Facebook user. Users can add friends and send them messages, and update their personal profiles to notify friends about themselves. Additionally, users can join networks organized by city, workplace, and school or college. The website's name stems from the colloquial name of books given at the start of the academic year by university administrations in the US with the intention of helping students to get to know each other better.

Mark Zuckerberg founded Facebook with his college roommates and fellow computer science students Eduardo Saverin, Dustin Moskovitz and Chris Hughes while he was a student at Harvard University. The website's membership was initially limited by the founders to Harvard students, but was expanded to other colleges in the Boston area, the Ivy League, and Stanford University. It later expanded further to include (potentially) any university student, then high school students, and, finally, to anyone aged 13 and over. The website currently has more than 400 million active users worldwide.

Facebook has met with some controversy. It has been blocked intermittently in several countries including Syria, China, Vietnam, and Iran. It has also been banned at many places of work to discourage employees from wasting time using the service.

Privacy has also been an issue, and it has been compromised several times. Facebook settled a lawsuit regarding claims over source code and intellectual property. The site has also been involved in controversy over the sale of fans and friends.

A January 2009 Compete.com study ranked Facebook as the most used social network by worldwide monthly active users, followed by MySpace. There have recently been reports of Facebook proposing an initial public offering (IPO), i.e. issue equity shares as stock to investors. However, Zuckerberg stresses that it will not be for a few more years, and the company is in no need of additional capital. Also, some analysts fear the Facebook IPO might be a particularly weak one.

In August 2009, Facebook announced the rollout of a "lite" version of the site, optimized for users on slower or intermittent Internet connections. Facebook Lite offered fewer services, excluded most third-party applications and required less bandwidth. A beta version of the slimmed-down interface was released first to invited testers, before a broader rollout across users in the USA, Canada, and India.

The media often compares Facebook to MySpace, but one significant difference between the two websites is the level of customization. MySpace allows users to decorate their profiles using HTML and Cascading Style Sheets (CSS), while Facebook only allows plain text.

Facebook has a number of features with which users may interact. They include the Wall, a space on every user's profile page that allows friends to post messages for the user to see; Pokes, which allows users to send a virtual "poke" to each other (a notification then tells a user that they have been poked); Photos, where users can upload albums and photos; and Status, which allows users to inform their friends of their whereabouts and actions. Depending on privacy settings, anyone who can see a user's profile can also view that user's Wall. In July 2007, Facebook began allowing users to post attachments to the Wall, whereas the Wall was previously limited to textual content only.

Over time, Facebook has added features to its website. On September 6, 2006, a News Feed was announced, which appears on every user's homepage and highlights information including profile changes, upcoming events, and birthdays of the user's friends. This has enabled spammers and other users to manipulate these features by creating illegitimate events or posting fake birthdays to attract attention to their profile or cause. Initially, the News Feed caused dissatisfaction among Facebook users; some complained it was too cluttered and full of undesired information, while others were concerned it made it too easy for other people to track down individual activities (such as changes in relationship status, events, and conversations with other users). In response to this dissatisfaction, Zuckerberg issued an apology for the site's failure to include appropriate customizable privacy features. Since then, users have been able to control what types of information are shared automatically with friends. Users are now able to prevent friends from seeing updates about certain types of activities, including profile changes, Wall posts, and newly added friends. On February 23, 2010, Facebook was granted US patent 7669123 on certain aspects of their News Feed. The patent covers News Feeds where links are provided so that one user can participate in the same activity of another user. This patent is controversial in that it appears to cover all types of News Feeds.

One of the most popular applications on Facebook is the Photos application, where users can upload albums and photos. Facebook allows users to upload an unlimited number of photos, compared with other image hosting services such as Photobucket and Flickr, which apply limits to the number of photos that a user is allowed to upload. During the first years, Facebook users were limited to 60 photos per album. As of May 2009, this limit has been increased to 200 photos per album. Privacy settings can be set for individual albums, limiting the groups of users that can see an album. For example, the privacy of an album can be set so that only the user's friends can see the album, while the privacy of another album can be set so that all Facebook users can see it. Another feature of the Photos application is the ability to "tag", or label users in a photo. For instance, if a photo contains a user's friend, then the user can tag the friend in the photo. This sends a notification to the friend that they have been tagged, and provides them a link to see the photo.

Facebook Notes was introduced on August 22, 2006, a blogging feature that allowed tags and embeddable images. Users were later able to import blogs from Xanga, LiveJournal, Blogger, and other blogging services During the week of April 7, 2008, Facebook released a Comet-based instant messaging application called "Chat" to several networks,[90] which allows users to communicate with friends and is similar in functionality to desktop-based instant messengers.

Facebook launched Gifts on February 8, 2007, which allows users to send virtual gifts to their friends that appear on the recipient's profile. Gifts cost $1.00 each to purchase, and a personalized message can be attached to each gift. On May 14, 2007, Facebook launched Marketplace, which lets users post free classified ads. Marketplace has been compared to Craigslist by CNET, which points out that the major difference between the two is that listings posted by a user on Marketplace are only seen by users that are in the same network as that user, whereas listings posted on Craigslist can be seen by anyone.

On July 20, 2008, Facebook introduced "Facebook Beta", a significant redesign of its user interface on selected networks. The Mini-Feed and Wall were consolidated, profiles were separated into tabbed sections, and an effort was made to create a "cleaner" look. After initially giving users a choice to switch, Facebook began migrating all users to the new version beginning in September 2008.

Social networks

A social network is a social structure made of individuals (or organizations) called "nodes," which are connected by friendship, kinship, financial exchange, dislike, sexual relationships, or relationships of beliefs, knowledge or prestige.

In its simplest form, a social network is a map of all of the relevant ties between all the nodes being studied. The network can also be used to measure social capital -- the value that an individual gets from the social network.

A social network service focuses on building and reflecting of social networks or social relations among people, e.g., who share interests and/or activities. A social network service essentially consists of a representation of each user (often a profile), his/her social links, and a variety of additional services. Most social network services are web based and provide means for users to interact over the internet, such as e-mail and instant messaging. Social networking sites allow users share ideas, activities, events, and interests within their individual networks.

The main types of social networking services are those which contain category places (such as former school-year or classmates), means to connect with friends (usually with self-description pages) and a recommendation system linked to trust.

Popular methods now combine many of these, with Facebook, Bebo and Twitter widely used worldwide; MySpace and LinkedIn being the most widely used in North America; Nexopia (mostly in Canada); Bebo, Hi5, StudiVZ (mostly in Germany), iWiW (mostly in Hungary), Tuenti (mostly in Spain), Decayenne, Tagged, XING;, Badoo and Skyrock in parts of Europe; Orkut and Hi5 in South America and Central America; and Friendster, Mixi, Multiply, Orkut, Wretch, renren and Cyworld in Asia and the Pacific Islands and Orkut and Facebook in India.

Some social networks have additional features, such as the ability to create groups that share common interests or affiliations, upload or stream live videos, and hold discussions in forums. Geosocial networking co-opts internet mapping services to organize user participation around geographic features and their attributes.

There is also a trend for more interoperability between social networks led by technologies such as OpenID and OpenSocial.


Lately, mobile social networking has become popular. In most mobile communities, mobile phone users can now create their own profiles, make friends, participate in chat rooms, create chat rooms, hold private conversations, share photos and videos, and share blogs by using their mobile phone. Mobile phone users are basically open to every option that someone sitting on the computer has. Some companies provide wireless services which allow their customers to build their own mobile community and brand it, but one of the most popular wireless services for social networking in North America is Facebook Mobile. Other companies provide new innovative features which extend the social networking experience into the real world.

Another social networking feature in a professional aspect is Linkedin.com. This social network allows professionals to exchange information, opportunities, and ideas. Professionals are able to stay informed with new knowledge about their field.

The use of social network services in an enterprise context presents the potential of having a major impact on the world of business and work.

Social networks connect people at low cost; this can be beneficial for entrepreneurs and small businesses looking to expand their contact bases. These networks often act as a customer relationship management tool for companies selling products and services. Companies can also use social networks for advertising in the form of banners and text ads. Since businesses operate globally, social networks can make it easier to keep in touch with contacts around the world.

One example of social networking being used for business purposes is LinkedIn.com, which aims to interconnect professionals. LinkedIn has over 40 million users in over 200 countries.

Another is the use of physical spaces available to members of a social network such as Hub Culture, an invitation only social network for entrepreneurs, and other business influentials, with Pavilions in major cities such as London, UK. Having a physical presence allows members to network in the real world, as well as the virtual, adding extra business value.

Applications for social networking sites have extended toward businesses and brands are creating their own, high functioning sites, a sector known as brand networking. It is the idea a brand can build its consumer relationship by connecting their consumers to the brand image on a platform that provides them relative content, elements of participation, and a ranking or score system. Brand networking is a new way to capitalize on social trends as a marketing tool.

Artificial life

Artificial life (commonly Alife or alife) is the creation of lifelike models and processes through simulations using computer models, robotics, and biochemistry. The discipline was named by Christopher Langton in 1986.

There are three main kinds of alife, named for their approaches:

soft, from software;

hard, from hardware;

and wet, from biochemistry.

Artificial life imitates traditional biology by trying to recreate biological phenomena. The term "artificial life" is often used to specifically refer to soft alife.

Artificial life studies the logic of living systems in artificial environments. The goal is to study the phenomena of living systems in order to come to an understanding of the complex information processing that defines such systems.

Artificial intelligence

Artificial intelligence (AI) is the intelligence of machines and the branch of computer science that aims to create it. It is the study and design of intelligent agents, where an intelligent agent is a system that perceives its environment and takes actions that maximize its chances of success. John McCarthy, who coined the term in 1956, defines it as "the science and engineering of making intelligent machines."

The field was founded on the claim that human intelligencecan be simulated by a machine. Today, has become an essential part of the technology industry, providing the heavy lifting for many of the most difficult problems in computer science.

The central problems of AI include such traits as reasoning, knowledge, planning, learning, communication, perception and the ability to move and manipulate objects.

iPod

The iPod is a portable media player designed and marketed by Apple and launched on October 23, 2001. The product line-up includes the hard drive-based iPod Classic, the touchscreen iPod Touch, the video-capable iPod Nano, and the compact iPod Shuffle. The iPhone can function as an iPod but is generally treated as a separate product. Former iPod models include the iPod Mini and the spin-off iPod Photo (since reintegrated into the main iPod Classic line). iPod Classic models store media on an internal hard drive, while all other models use flash memory to enable their smaller size. As with many other digital music players, iPods can also serve as external data storage devices. Storage capacity varies by model, ranging from 2GB for the iPod Shuffle to 160GB for the iPod Classic.

Apple's iTunes software can be used to transfer music to the devices from computers using certain versions of Apple Macintosh and Microsoft Windows operating systems. For users who choose not to use Apple's software or whose computers cannot run iTunes software, several open source alternatives to iTunes are also available. iTunes and its alternatives may also transfer photos, videos, games, contact information, e-mail settings, Web bookmarks, and calendars to iPod models supporting those features.

The current iPod line. From left to right: iPod Shuffle, iPod Nano, iPod Classic, iPod Touch.
 

The iPod line can play several audio file formats including MP3, AAC/M4A, Protected AAC, AIFF, WAV, Audible audiobook, and Apple Lossless. The iPod Photo introduced the ability to display JPEG, BMP, GIF, TIFF, and PNG image file formats. Fifth and sixth generation iPod Classics, as well as third generation iPod Nanos, can additionally play MPEG-4 (H.264/MPEG-4 AVC) and QuickTime video formats, with restrictions on video dimensions, encoding techniques and data-rates. Originally, iPod software only worked with Mac OS; iPod software for Microsoft Windows was launched with the second generation model.

 

Mashup

Mashup refers to:

Mashup (digital), a digital media file containing any or all of text, graphics, audio, video, and animation, which recombines and modifies existing digital works to create a derivative work.

Mashup (music), the musical genre encompassing songs which consist entirely of parts of other songs

Mashup (video), a video that is edited from more than one source to appear as one

Mashup (web application hybrid), a web application that combines data and/or functionality from more than one source

MP3

MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a patented digital audio encoding format using a form of lossy data compression. It is a common audio format for consumer audio storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on digital audio players.

MP3 is an audio-specific format that was designed by the Moving Picture Experts Group as part of its MPEG-1 standard. The group was formed by several teams of engineers at Fraunhofer IIS in Erlangen, Germany, AT&T-Bell Labs (now a division of Alcatel-Lucent) in Murray Hill, NJ, USA, Thomson-Brandt, and CCETT, as well as others. It was approved as an ISO/IEC standard in 1991.

The use in MP3 of a lossy compression algorithm is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11th, the size of the CD file created from the original audio source. An MP3 file can also be constructed at higher or lower bit rates, with higher or lower resulting quality.

The compression works by reducing accuracy of certain parts of sound that are deemed beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It internally provides a representation of sound within a short-term time/frequency analysis window, by using psychoacoustic models to discard or reduce precision of components less audible to human hearing, and recording the remaining information in an efficient manner.

This technique is often presented as relatively conceptually similar to the principles used by JPEG, an image compression format. The specific algorithms, however, are rather different: JPEG uses a built-in vision model that is very widely tuned (as is necessary for images), while MP3 uses a complex, precise masking model that is much more signal dependent.

An MP3 player is a device for playing MP3 files.



MP3 players come in many sizes and capacities. The smallest MP3 players use a type of memory known as flash; unlike conventional memory such as that found in a desktop computer, flash does not lose stored information when the power is turned off. Flash is very compact and uses very little power, allowing for extremely small designs with long battery life.

YouTube

YouTube is a video sharing website on which users can upload and share videos. YouTube was founded by Chad Hurley, Steve Chen and Jawed Karim, who were all early employees of PayPal.In November 2006, YouTube, LLC was bought by Google Inc. for $1.65 billion, and is now operated as a subsidiary of Google. The company is based in San Bruno, California, and uses Adobe Flash Video technology to display a wide variety of user-generated video content, including movie clips, TV clips, and music videos, as well as amateur content such as video blogging and short original videos. Most of the content on YouTube has been uploaded by individuals, although media corporations including CBS, the BBC, UMG and other organizations offer some of their material via the site, as part of the YouTube partnership program.

Unregistered users can watch the videos, while registered users are permitted to upload an unlimited number of videos. Videos that are considered to contain potentially offensive content are available only to registered users over the age of 18. The uploading of videos containing defamation, pornography, copyright violations, and material encouraging criminal conduct is prohibited by YouTube's terms of service. The account profiles of registered users are referred to as "channels".

In November 2008, YouTube reached an agreement with MGM, Lions Gate Entertainment and CBS, allowing the companies to post full-length films and television episodes on the site, accompanied by advertisements in a section for US viewers called "Shows". The move was intended to create competition with websites such as Hulu, which features material from NBC, Fox, and Disney. In November 2009, YouTube launched a version of "Shows" available to UK viewers, offering around 4000 full-length shows from more than 60 partners.

On October 9, 2009, the third anniversary of the acquisition by Google, Chad Hurley announced in a blog posting that YouTube was serving "well over a billion views a day" worldwide.

Starting in March 2010, YouTube will stream all 60 cricket matches of the Indian Premier League worldwide for free, making it the world's first free online broadcast of a major sporting event.

Before the launch of YouTube in 2005, there were few easy methods available for ordinary computer users who wanted to post videos online. With its simple interface, YouTube made it possible for anyone with an Internet connection to post a video that a worldwide audience could watch within a few minutes. The wide range of topics covered by YouTube has turned video sharing into one of the most important parts of Internet culture.

An early example of the social impact of YouTube was the success of the Bus Uncle video in 2006. It shows a heated conversation between a youth and an older man on a bus in Hong Kong, and was discussed widely in the mainstream media. Another YouTube video to receive extensive coverage is guitar, which features a performance of Pachelbel's Canon on an electric guitar. The name of the performer is not given in the video, and after it received millions of views The New York Times revealed the identity of the guitarist as Jeong-Hyun Lim, a 23-year-old from South Korea who had recorded the track in his bedroom.

YouTube was awarded a 2008 George Foster Peabody Award and cited for being "a 'Speakers' Corner' that both embodies and promotes democracy."

Viewing YouTube videos on a personal computer requires the Adobe Flash Player plug-in to be installed in the browser. The Adobe Flash Player plug-in is one of the most common pieces of software installed on personal computers and accounts for almost 75% of online video material.

Videos uploaded to YouTube by standard account holders are limited to ten minutes in length and a file size of 2 GB.

YouTube accepts videos uploaded in most container formats, including .AVI, .MKV, .MOV, .MP4, DivX, .FLV, and .OGG. These include video codecs such as MPEG-4, MPEG, and .WMV. It also supports 3GP, allowing videos to be uploaded from legacy mobile phones.

 

Things Bloggers Need to Know

Archives

A blog is also a good way to keep track of articles on a site. A lot of blogs feature an archive based on dates (like a monthly or yearly archive). The front page of a blog may feature a calendar of dates linked to daily archives. Archives can also be based on categories featuring all the articles related to a specific category.

It does not stop there; you can also archive your posts by author or alphabetically. The possibilities are endless. This ability to organize and present articles in a composed fashion is much of what makes blogging a popular personal publishing tool.

Feeds

A Feed is a function of special software that allows "Feedreaders" to access a site automatically looking for new content and then post updates about that new content to another site. This provides a way for users to keep up with the latest and hottest information posted on different blogging sites. Some Feeds include RSS (alternately defined as "Rich Site Summary" or "Really Simple Syndication"), Atom or RDF files.

Blogrolls

A blogroll is a list, sometimes categorized, of links to webpages the author of a blog finds worthwhile or interesting. The links in a blogroll are usually to other blogs with similar interests. The blogroll is often in a "sidebar" on the page or featured as a dedicated separate web page. BlogRolling and blo.gs are two websites that provide some interesting functions or help related to blogrolls. These sites provide methods for users to maintain these rolls effortlessly and integrate them into weblogs.

Syndication

A feed is a machine readable (usually XML) content publication that is updated regularly. Many weblogs publish a feed (usually RSS, but also possibly Atom and RDF). There are tools out there that call themselves "feedreaders". What they do is they keep checking specified blogs to see if they have been updated, and when the blogs are updated, they display the new post, and a link to it, with an excerpt (or the whole contents) of the post. Each feed contains items that are published over time. When checking a feed, the feedreader is actually looking for new items. New items are automatically discovered and downloaded for you to read. Just so you don't have to visit all the blogs you are interested in. All you have to do with these feedreaders is to add the link to the RSS feed of all the blogs you are interested in. The feedreader will then inform you when any of the blogs have new posts in them. Most blogs have these "Syndication" feeds available for the readers to use.

Managing Comments

One of the most exciting features of blogging tools are the comments. This highly interactive feature allows users to comment upon article posts and link to your posts and comment on and recommend them. These are known as trackbacks and pingbacks . We'll also discuss how to moderate and manage comments and how to deal with the annoying trend in "comment spam", when unwanted comments are posted to your blog.

■Trackbacks

■Pingbacks

■Verifying Pingbacks and Trackbacks

■Comment Moderation

■Comment Spam

Trackbacks

Trackbacks were originally developed by SixApart, creators of the MovableType blog package.

In a nutshell, TrackBack was designed to provide a method of notification between websites: it is a method of person A saying to person B, "This is something you may be interested in." To do that, person A sends a TrackBack ping to person B.

A better explanation is this:

■Person A writes something on their blog.

■Person B wants to comment on Person A's blog, but wants her own readers to see what she had to say, and be able to comment on her own blog

■Person B posts on her own blog and sends a trackback to Person A's blog

■Person A's blog receives the trackback, and displays it as a comment to the original post. This comment contains a link to Person B's post

The idea here is that more people are introduced to the conversation (both Person A's and Person B's readers can follow links to the other's post), and that there is a level of authenticity to the trackback comments because they originated from another weblog. Unfortunately, there is no actual verification performed on the incoming trackback, and indeed they can even be faked.

Most trackbacks send to Person A only a small portion (called an "excerpt") of what Person B had to say. This is meant to act as a "teaser", letting Person A (and his readers) see some of what Person B had to say, and encouraging them all to click over to Person B's site to read the rest (and possibly comment).

Person B's trackback to Person A's blog generally gets posted along with all the comments. This means that Person A can edit the contents of the trackback on his own server, which means that the whole idea of "authenticity" isn't really solved. (Note: Person A can only edit the contents of the trackback on his own site. He cannot edit the post on Person B's site that sent the trackback.)

Pingbacks

Pingbacks were designed to solve some of the problems that people saw with trackbacks. The official pingback documentation makes pingbacks sound an awful lot like trackbacks:

For example, Yvonne writes an interesting article on her Web log. Kathleen reads Yvonne's article and comments about it, linking back to Yvonne's original post. Using pingback, Kathleen's software can automatically notify Yvonne that her post has been linked to, and Yvonne's software can then include this information on her site.

The best way to think about pingbacks is:

■Person A posts something on his blog.

■Person B posts on her own blog, linking to Person A's post. This automatically sends a pingback to Person A when both have pingback enabled blogs.

■Person A's blog receives the pingback, then automatically goes to Person B's post to confirm that the pingback did, in fact, originate there.

The pingback is generally displayed on Person A's blog as simply a link to Person B's post. In this way, all editorial control over posts rests exclusively with the individual authors (unlike the trackback excerpt, which can be edited by the trackback recipient). The automatic verification process introduces a level of authenticity, making it harder to fake a pingback.

Comment Moderation

Comment Moderation is a feature which allows the website owner and author to monitor and control the comments on the different article posts, and can help in tackling comment spam. It lets you moderate comments, & you can delete unwanted comments, approve cool comments and make other decisions about the comments.

Blog by email

Some blogging tools offer the ability to email your posts directly to your blog, all without direct interaction through the blogging tool interface. WordPress offers this cool feature. Using email, you can now send in your post content to a pre-determined email address & voila! Your post is published!

Plugins

Plugins are cool bits of programming scripts that add additional functionality to your blog. These are often features which either enhance already available features or add them to your site.

A Few Blogging Tips

Starting a new blog is difficult and this can put many people off. Some may get off to a good start only to become quickly discouraged because of the lack of comments or visits. You want to stand out from this crowd of millions of bloggers, you want to be one of the few hundred thousand blogs that are actually visited.

Here are some simple tips to help you on your way to blogging mastery:

1.Post regularly, but don't post if you have nothing worth posting about.

2.Stick with only a few specific genres to talk about.

3.Don't put 'subscribe' and 'vote me' links all over the front page until you have people that like your blog enough to ignore them (they're usually just in the way).

4.Use a clean and simple theme if at all possible.

5.Enjoy, blog for fun, comment on other peoples' blogs (as they normally visit back).

Blogs

What is a "blog"?

"Blog" is an abbreviated version of "weblog," which is a term used to describe web sites that maintain an ongoing chronicle of information. A blog is a frequently updated, personal website featuring diary-type commentary and links to articles on other Web sites. Blogs range from the personal to the political, and can focus on one narrow subject or a whole range of subjects.

Many blogs focus on a particular topic, such as web design, home staging, sports, or mobile technology. Some are more eclectic, presenting links to all types of other sites. And others are more like personal journals, presenting the author's daily life and thoughts.

Generally speaking (although there are exceptions), blogs tend to have a few things in common:

■A main content area with articles listed chronologically, newest on top. Often, the articles are organized into categories.

■An archive of older articles.

■A way for people to leave comments about the articles.

■A list of links to other related sites, sometimes called a "blogroll".

■One or more "feeds" like RSS, Atom or RDF files.

Some blogs may have additional features beyond these.

The Blog Content

Content is the heart of any web site. Retail sites feature a catalog of products. University sites contain information about their campuses, curriculum, and faculty. News sites show the latest news stories. For a personal blog, you might have a bunch of observations, or reviews. Without some sort of updated content, there is little reason to visit a web site more than once.

On a blog, the content consists of articles (also sometimes called "posts" or "entries") that the author(s) writes. Yes, some blogs have multiple authors, each writing his/her own articles. Typically, blog authors compose their articles in a web-based interface, built into the blogging system itself. Some blogging systems also support the ability to use stand-alone "weblog client" software, which allows authors to write articles offline and upload them at a later time.

Comments

Want an interactive website? Wouldn't it be nice if the readers of a website could leave comments, tips or impressions about the site or a specific article? With blogs, they can! Posting comments is one of the most exciting features of blogs.

Most blogs have a method to allow visitors to leave comments. There are also nifty ways for authors of other blogs to leave comments without even visiting the blog! Called "pingbacks" or "trackbacks", they can inform other bloggers whenever they cite an article from another site in their own articles. All this ensures that online conversations can be maintained painlessly among various site users and websites.

The Difference Between a Blog and CMS?

Software that provides a method of managing your website is commonly called a CMS or "Content Management System". Many blogging software programs are considered a specific type of CMS. They provide the features required to create and maintain a blog, and can make publishing on the internet as simple as writing an article, giving it a title, and organizing it under (one or more) categories. While some CMS programs offer vast and sophisticated features, a basic blogging tool provides an interface where you can work in an easy and, to some degree, intuitive manner while it handles the logistics involved in making your composition presentable and publicly available. In other words, you get to focus on what you want to write, and the blogging tool takes care of the rest of the site management.

WordPress is one such advanced blogging tool and it provides a rich set of features. Through its Administration Panels, you can set options for the behavior and presentation of your weblog. Via these Administration Panels, you can easily compose a blog post, push a button, and be published on the internet, instantly! WordPress goes to great pains to see that your blog posts look good, the text looks beautiful, and the html code it generates conforms to web standards.

If you're just starting out, read Getting Started with WordPress, which contains information on how to get WordPress set up quickly and effectively, as well as information on performing basic tasks within WordPress, like creating new posts or editing existing ones.