Technology in action
This presentation is the property of its rightful owner.
Sponsored Links
1 / 30

Technology In Action PowerPoint PPT Presentation


  • 42 Views
  • Uploaded on
  • Presentation posted in: General

Technology In Action. What is Computer Fluency?. To be computer fluent you must: Understand a computer’s capabilities and limitations Know how to use a computer. NEXT SLIDE. What is Computer Fluency?. Being computer fluent also helps you:

Download Presentation

Technology In Action

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


Technology in action

Technology In Action


What is computer fluency

What is Computer Fluency?

  • To be computer fluent you must:

    • Understand a computer’s capabilities and limitations

    • Know how to use a computer

NEXT

SLIDE


What is computer fluency1

What is Computer Fluency?

  • Being computer fluent also helps you:

    • Use your computer more wisely and be more knowledgeable consumer

    • In your career

    • Better understand and take advantage of future technologies

NEXT

SLIDE


Computers are data processing devices

Computers are Data Processing Devices

  • Four major functions:

    • Input data

    • Process data

    • Output information

    • Store data and information

NEXT

SLIDE


Computer hardware

Computer Hardware

  • Input devices

  • System unit

    (Processing devices)

  • Output devices

  • Storage devices

NEXT

SLIDE


Bits and bytes the language of computers

Bits and Bytes: The Language of Computers

  • Bit

    • Binary digit ( 0 or 1 )

  • Byte

    • Eight bits

    • Represent letters, numbers, and special characters

  • b, KB, MB, GB

NEXT

SLIDE


Data vs information

Data vs. Information

  • Data

    • A representation of a fact or idea.

    • A number, a word, a picture, a recording of sound

  • Information

    • Data that has been organized or presented in a meaningful fashion

NEXT

SLIDE


Computer software

Computer Software

  • Programs that enable the computer to perform different tasks

    • System software

    • Application software

NEXT

SLIDE


Specialty computers

Specialty Computers

PDA

Server

  • PDA

  • Server

  • Mainframe

  • Supercomputer

Mainframe

Supercomputer

NEXT

SLIDE


Technology in action1

Technology In Action

Chapter 2

Looking at Computers: Understanding the Parts

NEXT

SLIDE


Topics

Topics

  • Hardware components

  • Input devices

  • Output devices

  • System unit

  • Ergonomics

NEXT

SLIDE


The computer system

The Computer System

  • Hardware components:

    • System unit

    • Peripheral devices

Monitor

System unit

Speaker

Printer

Microphone

Mouse

Keyboard

NEXT

SLIDE


Input devices

Input devices

  • Enable data and instructions to be entered into the computer

  • Types of input devices:

    • Keyboard

    • Mouse / pointing device

    • Microphone

    • Scanner

    • Digital camera

NEXT

SLIDE


Keyboards

Keyboards

  • Popular keyboard layouts:

    • QWERTY

    • Dvorak

NEXT

SLIDE


Enhanced keyboard

Multimedia

Internet

Toggle and other keys

Function keys

Numeric keypad

Arrow keys

Windows keys

Enhanced Keyboard

  • Standard alpha-numeric keys

  • Specialty keys

NEXT

SLIDE


Specialty keyboards

Specialty Keyboards

  • Laptops

  • PDAs

  • Wireless

    • Infrared

    • RF

  • Ergonomic

Laptop

PDA

Ergonomic

NEXT

SLIDE


Technology in action

Mice

  • Types of mice:

    • Standard

      • PS/2

      • USB

      • Cordless

    • Optical

    • Trackball

Standard

Wireless

Trackball

Optical

NEXT

SLIDE


Other pointing devices

Other Pointing Devices

Pointing stick

Touch screen

  • Pointing stick

  • Touch screen

  • Touchpad

  • Joystick

  • Stylus

Touchpad

Joy stick

Stylus

NEXT

SLIDE


Inputting sound

Inputting Sound

  • Microphone

    • Speech-recognition

    • Videoconferencing

Microsoft Office Speech Recognition Tool

NEXT

SLIDE


Other input devices

Other Input Devices

Handheld

  • Scanners

    • Text

    • Images

  • Digital cameras

    • Images

    • Video

Flatbed

Camcorder

Camera

Web cam

NEXT

SLIDE


Output devices

Output Devices

  • Enable us to view or hear the processed data

  • Types of output devices:

    • Monitors

    • Printers

    • Speakers

NEXT

SLIDE


Monitors

Monitors

  • Cathode-ray tube (CRT)

  • Liquid crystal display (LCD)

    • Passive-matrix

    • Active-matrix

LCD

CRT

NEXT

SLIDE


Crt monitors

CRT Monitors

  • Uses picture tube technology

  • Screen size – Diagonal measurement of the screen (15, 17, 19, 21)

  • Resolution – Sharpness of the image determined by the number pixels that the screen can display (800 x 600, 1024 x 768, 1600 x 1200)

  • Refresh rate – Speed at which the screen is refreshed (60Hz, 75Hz)

NEXT

SLIDE


Liquid crystal display

Polarizer

Color filter

Color filter glass

Liquid Crystal

Glass polarizer

Backlight

Liquid Crystal Display

  • Liquid crystal sandwiched between two transparent layers form images

  • Used for notebook computers, PDAs, cellular phones, and personal computers

NEXT

SLIDE


Crt vs lcd monitors

CRT MONITOR ADVANTAGES

Images viewable from all angles (LCD monitors often have limited viewing angle)

Resolution can be adjusted more completely

Better color accuracy and clarity

Less expensive than LCD monitors

Better for gaming and watching DVDs due to quicker pixel response time and higher color accuracy

LCD MONITOR ADVANTAGES

Take up less space and weigh less than CRT monitors

Cause less eyestrain than CRT monitors

More environmentally friendly than CRT monitors

Larger viewable area compared with similar sized CRT (17-inch viewable area on 17-inch monitor compared with 15-inch viewable area)

CRT vs. LCD Monitors

NEXT

SLIDE


Crt vs lcd

Physical Size

Weight

Power

Heat output

Display area

Image quality

Image distortion

Aesthetics

CRT Vs. LCD


Printers

Printers

  • Impact printers

    • Dot-matrix

  • Nonimpact printers

    • Inkjet

    • Laser

    • Multifunction

  • Specialty printers

    • Plotters

    • Thermal printers

NEXT

SLIDE


Choosing a printer

Speed:

Pages per minute (ppm)

Inkjets print 2-6 ppm

Lasers print 20-30 ppm

Resolution:

Image clarity

Dots per inch (dpi)

300 dpi for general printing

1200 dpi for printing photos

Color output:

Quality of color images

Inkjets use 4 or 6 color cartridges

Lasers use separate color toner cartridges

Memory:

Inkjets need 4-8 MB

Lasers need 16 MB

Cost:

Inkjets are inexpensive

Lasers are more expensive

Choosing a Printer

NEXT SLIDE


Example ink jet printer

Example: ink-jet printer

Epson Stylus C83 Ink-Jet Printer

  • Technology (Detailed): Inkjet

  • Max Resolution (BW): 5760 x 1440 dpi

  • Max Resolution (Color):5760 x 1440 dpi

  • Black Print Speed: 22 ppm

  • Color Print Speed: 12 ppm

  • Cartridges: four (cyan,magenta,yellow, black)

  • Platform: PC, Mac

  • Media Type:

    • Bond Paper • Plain Paper • Thermal Paper • Transparencies

  • Max Media Size: Folio (216 x 330 mm, 8.5 x 13")


Outputting sound

Outputting Sound

  • Inexpensive speakers

  • Sophisticated sound system

    • Surround sound

    • Subwoofer

NEXT

SLIDE


  • Login