coms 161 introduction to computing n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
COMS 161 Introduction to Computing PowerPoint Presentation
Download Presentation
COMS 161 Introduction to Computing

Loading in 2 Seconds...

play fullscreen
1 / 24

COMS 161 Introduction to Computing - PowerPoint PPT Presentation


  • 106 Views
  • Uploaded on

COMS 161 Introduction to Computing. Title: Understanding Information Technology Date: January 17, 2005 Lecture Number: 3. Announcements. Review. Outline. Digital Information Digital Domain. The Digital Environment.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'COMS 161 Introduction to Computing' - floriane


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
coms 161 introduction to computing

COMS 161Introduction to Computing

Title: Understanding Information Technology

Date: January 17, 2005

Lecture Number: 3

outline
Outline
  • Digital Information
  • Digital Domain
the digital environment
The Digital Environment
  • Over the past decade we have been increasingly exposed to digital information in our daily lives
    • What are some examples of digital information?
      • Digital Documents
        • Easier to create, store, transmit and manipulate
      • Digital Numeric Processing
        • Many uses for spreadsheets
the digital environment1
The Digital Environment
  • More examples of digital information
    • Digital Music
      • CDs, MP3s
    • Digital Photography
      • Digital cameras, image manipulation software
    • Digital Graphic Arts
      • Advertisement, movie special effects
    • Digital Television
      • Direct TV, HDTV, TiVo
the digital environment more examples
The Digital EnvironmentMore Examples
  • More examples of digital information
    • Virtual Reality
      • Games, medicine, …
    • Digital Communications
      • Please check your cell phone at the door before class!!
    • The Internet
      • Network backbone
the digital environment more examples1
The Digital EnvironmentMore Examples
    • More examples of digital information
      • The World Wide Web
        • A set of computer systems that follow certain guidelines for storing and presenting information
        • Web site and web pages
      • Browsers
      • Web pages/sites
      • Hypertext
  • Collectively digital information is often referred to as “media”
the digital domain
The Digital Domain
  • In the past
    • Computers were used for numeric computation
  • That was then, but today
    • Computers used for expressing and communicating information
  • Digital Domain
    • Digitized data and the systems that handle it
the digital domain1
The Digital Domain
  • Two Essential Components
    • MultimediaInformation
      • The ability of modern desktop computer systems to collect, store, retrieve, display, and generally manage information in a variety of media
      • The integration of various kinds of information
the digital domain2
The Digital Domain
  • Two Essential Components (Cont.)
    • NetworkedCommunications
      • Potential for cooperative work using fully interconnected computers and computer networks
      • The interconnection of information in various locations
the digital domain3
The Digital Domain
  • Digitizing data
    • Converting raw data to simple numbers
    • An example (using image data)
the digital domain4
The Digital Domain
  • Digitizing data
    • Break up the data into small, manageable chunks
the digital domain5
The Digital Domain
  • Digitizing data
    • Average the contents of each chunk
the digital domain6
The Digital Domain
  • Digitizing data
    • Pick a number to represent the contents of each chunk
the digital domain7
The Digital Domain
  • Digitizing data
    • The quality of the digitized picture depends on the size of each chunk
the digital domain8
The Digital Domain
  • Once information is converted into digital form, it becomes easy to
    • Store (no matter what kind of information)
    • Copy
    • Combine
    • Modify (edit)
    • Share
    • Transmit
    • Taken without permission
the digital domain9
The Digital Domain
  • The Internet
    • Really a very loose collection of networks
    • No single entity controls it
    • Many kinds of information travel around it constantly
      • Email
      • News
      • Entertainment
      • Commerce
      • Etc.
the digital domain10
The Digital Domain
  • The Internet
    • No one validates this information
    • No one directly polices this information
the digital domain11
The Digital Domain
  • The World Wide Web (WWW)
    • Just a part of the Internet
    • Consists of all the information on the Internet that someone has made available in a particular way
    • Information on your computer can become part of the Web if you configure it as a web server
the digital domain12
The Digital Domain
  • Web Browsers
    • Computer programs that make it easy for anyone on the Internet to access information on the Web
    • Many to choose from; they all use common techniques
      • FireFox, Mozilla, Netscape Communicator
      • Internet Explorer
      • Cell Phones and PDAs
      • WebTV, …
the digital domain13
The Digital Domain
  • Summary
    • Today’s computer systems are far more than computational and text processing tools
      • Enable a new communication paradigm
      • Information can be digitized and therefore easily manipulated by computers
      • Computers can be networked and therefore information can be easily exchanged
the digital domain14
The Digital Domain
  • Summary (Cont.)
    • This paradigm is enhanced by the rapid expansion of the World Wide Web
    • The “Digital Domain” is the convergence of two technologies:
      • Multimedia
      • Networking
the digital domain15
The Digital Domain
  • Summary (Cont.)
    • Our lives are increasingly influenced by this easy availability of information
    • It is our responsibility to evaluate the veracity of and the right to use the information we find