Download Mobile Computing

Technology In Action Chapter 8
Mobile Computing
• Advantages and limitations of mobile
computing
• Mobile computing devices:
– Pagers
– Cell phones
– PDAs
– MP3 players
• Synchronizing mobile devices with
computers
• Tablet PCs
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Technology In Action Chapter 8
Mobile Computing: Is it Right for
You?
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Advantages
Convenience
Boost productivity
Communicate with
others anywhere
Access to electronic
information
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Limitations
Expensive
Battery life
Small screen display
Slower Internet speed
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Technology In Action Chapter 8
Mobile Computing Devices
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Pagers
Cellular phones
MP3 players
Personal digital assistants
Tablet PCs
Laptop computers
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Technology In Action Chapter 8
Paging Devices
• Small wireless devices that receive
numeric messages (phone numbers)
• Recent technological advancements
enable:
– Voice paging:
• Receiving voice messages
– Alphanumeric paging:
• Receiving numeric and text messages
– Two-way paging:
• Receiving and sending text messages
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Technology In Action Chapter 8
Cellular Phones
• Full-featured communication and
information storage devices
• Features include:
– Auto-redial
– Call timers
– Voice-mail
– Voice-activated dialing
– Internet access
– Text messaging
– Personal information management
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Technology In Action Chapter 8
Cell Phone Hardware
• Microprocessor (CPU):
– Coordinates data between components Memory
– Runs the operating system
• Memory:
– ROM stores the operating system
– Internal memory chips store:
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Contact data
Ring tones
Images
Small application programs
Microprocessor
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Technology In Action Chapter 8
Cell Phone Hardware
• Input devices:
– Microphone
– Keypad
– Graffiti pad
– Touch-screen
– Digital camera
Speaker
LCD display
Keypad
• Output devices:
– Speaker
– LCD display
Microphone
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Technology In Action Chapter 8
Cell Phone Features
• Text messaging:
– Short Message Service (SMS):
• Send messages up to 160 characters
– Multimedia Message Service (MMS):
• Send text, sound, images, and video clips
• Internet connectivity:
– Wireless Internet service provider
– Maximum speed of 14.4 Kbps
– Micro-browser software
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Technology In Action Chapter 8
MP3 Players
• MP3:
– Format for storing music
• MP3 player:
– A small device that stores and plays music
• Storage space determines the number of
songs stored:
– Memory chips 64 MB to 256 MB
– Hard drive up to 40 GB
– Sampling rate
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Technology In Action Chapter 8
MP3 Flash Memory
• Used to add additional memory
to MP3 players
• Types of flash memory:
– Compact Flash:
• 64 MB to 1 GB
– Multimedia (MMC) and
SmartMedia:
• 128 MB
– Secure Digital:
• 512 MB
– Sony Memory Stick:
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Technology In Action Chapter 8
MP3 Ethical Issues
• Is it illegal to download MP3 files?
– MP3.com:
• Song files are on a public server
• Permission is given by the artist or recording
company to place the files on the server
• A fee is paid to download a file.
– Napster:
• A file exchange site
• Song files were borrowed from users’ computers
(peer-to-peer (P2P) sharing)
• Sued for copyright infringement
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Technology In Action Chapter 8
Personal Digital Assistants
(PDAs)
• Small devices that store digital information
• Known as palm computers or handhelds
• PDA hardware includes:
– CPU
– Operating system
– Storage capabilities
– Input/output devices
– Ports
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Technology In Action Chapter 8
PDA Input and Output Devices
Input devices
• Touch-screen with
stylus
• Keyboards:
Output devices
• LCD displays:
– Grayscale
– Color
– On-screen
– Integrated
– Folding
• Digital cameras
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Technology In Action Chapter 8
PDA Processors
• Popular processors:
– Motorola DragonBall
– Texas Instruments OMAP
– Intel XScale
• Comparing processors:
– Speed
– Performance:
• Benchmarking
– Power consumption
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Technology In Action Chapter 8
PDA Operating Systems
Palm OS
• Uses less memory
than Pocket PC
• Easy to use graphical
interface
• Features include:
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Calendar
To-do list
Contact information
Viewing Videos
Playing MP3 files
Pocket PC
• Scaled-down version
of Windows
• More expensive than
Palm OS
• Features include:
– PDA version of
Microsoft Word and
Excel
– Viewing videos
– Playing MP3 files
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Technology In Action Chapter 8
PDA Memory and Storage
• ROM stores the operating
system and the basic
programs
• RAM stores additional
applications and data
• Flash memory is used for
additional storage
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Technology In Action Chapter 8
PDA File Transfer and
Synchronization
• PDA files can be transferred
to a desktop using:
– Flash card readers
– Cradles
• Synchronizing updates files
on both the PDA and
desktop
• Wireless transfers:
– IrDA
– Bluetooth
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Technology In Action Chapter 8
PDA Internet Connectivity
• An Internet
connection
requires a
wireless ISP
• Web pages are
accessed using
Wireless
Application
Protocol (WAP)
• Web clipping
enables
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Technology In Action Chapter 8
PDA Software and Accessories
• Standard software:
– To-do list
– Contacts manager
– Calendar
• Additional software:
• Blueboard:
– PDA display acts as a
drawing board
– Connects to four other
PDAs
– Microsoft Word and
Excel
– Games
– Tools
– References
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Technology In Action Chapter 8
Tablet PCs
• Portable computers with handwriting
recognition and speech recognition
• Two monitor modes:
– Laptop
– Tablet
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Technology In Action Chapter 8
Tablet PC Hardware
• Tablet PC hardware includes:
– CPU
– Operating system
– Storage capabilities
– Input/output devices
– Ports
• Digital ink technology:
– Pressure sensitive screen
– Digital pen
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Technology In Action Chapter 8
Tablet Software
• Windows XP Tablet PC is the operating
system
• Applications programs compatible with
Windows XP are available
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Technology In Action Chapter 8
Laptops
• Also known as notebooks
• Computing power of a desktop
• Weigh 6 pounds
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Technology In Action Chapter 8
Laptop Hardware
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DVD/CD-RW drives
Hard drives
RAM
Hot-swappable bays:
– Remove a drive and
replace it with another
type
• Keyboard
• Built-in mouse
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Technology In Action Chapter 8
Laptop Operating Systems
• Same operating systems as those found
on desktops
• Power management:
– Shuts down the hard drive
– Turns off the monitor
– Puts the computer into standby mode
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Technology In Action Chapter 8
Laptop Ports
• A full set of ports:
– Parallel
– Monitor
– USB
– Modem
– Ethernet
– Audio jacks
– FireWire
– PCI type I/II card slots
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