Computers and Mobile Devices Joan Wells. Types of Systems Microcomputers ▫Desk Tops Servers – access to networks ▫Mainframe ▫Mini Computer Super Computers.

Computers and Mobile DevicesJoan Wells

Types of Systems• Microcomputers

▫ Desk Tops

•Servers – access to networks▫ Mainframe▫ Mini Computer

• Super Computers• Terminals

▫ Limited processing, monitor, connection to a network, keyboard and memory Point-of-Sale Terminals (POS)

Cash register, Bar code reader, (laser) printer▫ Outputs price, item, on a receipt ▫ Maintains sales records

Automated Teller Machines (ATM)112

More SystemsNotebooks (laptops) –

portable or mobileRechargeable battery to provide

powerBuilt-in display screen or keyboard

pointing devicePossible to connect to detachable

drives.

Tablet – similar to a notebook (about 3 lbs.)Convertible screen pivots

(notebook or a clipboard.)Advanced handwriting recognition

– converts to digital.Speech recognition record

discussions or lectures Control the computer using voice

commands.

• Cloud Computing – On-line Storage

• Resources include:▫ E-mail, music,

photos▫ Web apps, storage▫ Business programs,

servers▫ Global

• Free or fee depending on use116

The Big Computers

•Mainframe▫ 1000s of users, vast storage,

multitasking

• Supercomputer▫ Sophisticated math calculations,

weather forecasting

•Run fewer programs faster

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Mobile Devices• Pocket size• Store programs and

data permanently on memory ▫ inside the system unit▫ on small media storage

Memory cards

• Types of Mobile Devices:▫ Smart phones▫ Portable media

players▫ Digital cameras

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Mobile Device Limitations

• Battery life limits the usefulness of some mobile devices

• The screen is small on most devices• The speed of the Internet connection available

is low• Mobile computing devices are more expensive

and less rugged than desktop systems ▫Vibration, falls, dust, and liquids can destroy

your notebook, iPod or smartphone• Consider additional warranty, repair bills, and

replacement costs.

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Mobile Device Buyer’s Guide• Choose a wireless carrier

and plan within your means

• Consider size, style and weight

• Compatible with e-mail program ▫ Synchronizing e-mail

messages▫ Contacts, calendar

• Choose sufficient battery life

• Choose enough memory and storage▫ Photos, videos, apps

• Accessories▫ Earbuds▫ Screen protectors▫ Carrying cases

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A Smart Phone• A mobile phone built on

a mobile computing platform▫ advanced computing

ability ▫ connectivity

• Includes:▫ High-resolution

touchscreens▫ Web browsers

•Smart Phone Features▫Email, Web

Via WiFi or Data plan▫ Media Player▫ Digital Camera▫ Mic, Bluetooth

headset▫ Live video interaction▫ Audio (Apple Seri)▫ Wireless access point

Connect to wired Net using WiFi

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Software and Accessories

•Modified versions of application software are available for PDA/smartphones.

•Read and edit files that can be transmitted to full-version applications on your computer.

•Games, tools, and reference applications are available from numerous software companies. A good source is www.pdastreet.com and www.tucows.com.

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Text Messaging • Short message service

(SMS) allows you to send short text messages (as many as 166 characters) over mobile networks.

• A numeric keypad is used to type your message.

• Send texts to another mobile device or any e-mail address.

• Send short messages from your computer to mobile devices.

• Multimedia message service (MMS) ▫ Send images, and video clips

to other phones and e-mail addresses.

• Messages arrive in a series▫ View text, then image, then

sound. Save just one part of the message.

• Web Feed • Atom – updated Web resources• Really Simple Syndication

(RSS)▫ Financial, sports, and weather

services ▫ Send automatically to phones

using MMS.117

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Accessories

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Using a Point and Shoot Digital Camera

• Advantages of Digital Camera

View results immediately Modify while in the camera Transfer images to a

computer Some record video May be integrated into a

smartphone

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Point & Shoot Features

• Light-weight• Built-in lens• Smart phones• Autofocus, zoom• Still image (some video)• Some GPS, waterproof• Some memory card (transfer)• Some edit, print, share

photos

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Digital Camera Single Lens Reflex (SLR)Features of an SLR Camera

High –endInterchangeable lenses

Variety of lensesUses mirror to display exact replica of imageHeavier, largerCost is higher

Some extra features:

Autofocus, zoomStill image (some video)Some GPS, waterproofSome memory card (transfer)Some edit, print, share photos

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Viruses and Virus Protection

• Cell phones are being targeted by malicious viruses ▫ Users use cell phones for sensitive data (e-mail, financial

banking.) ▫ An expensive virus can allow your phone to be used without your

permission or knowledge to make calls.•  Leading companies currently providing antivirus software for

mobile devices. ▫ Symantec, McAffee, and F-Secure are the

• Common sense defense includes ▫ Not downloading ring tones, games or other software from

unfamiliar Web sites . ▫ Check the phone manufacturer’s Web sites frequently to see

whether your phone needs updates that could patch security holes. McAffee ClamWin Portable Panda Vigator

•  

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Flash Memory Cards

• CompactFlash cards, the size of a matchbook, can hold between 4GB and 64GB of data.

• Multimedia cards and SmartMedia cards▫Similar size but are thinner and less rugged.

• Secure Digital card ▫Faster and offers encryption capabilities so that your

data is secure even if you lose the card. • Warning: Particular models of PMPs can support

only certain types of flash cards, so check your manual to be sure you buy compatible memory cards.

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Ch. 3 Computers and Mobile Devices

File Transfer

Flash Card Cradle

• To transfer data, remove the flash card you are using and slip it into the flash card reader on your computer. ▫ If your computer does

not include a built-in card reader, you can purchase an external memory card reader that connects to your computer using a USB port.

• You can also transfer your data from your PDA/smartphone to a desktop computer by using a cradle Most PDA/smartphones come with a cradle that connects the device to the desktop using a USB port.

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Synchronization between a PDA/Smartphone and a Computer

• Update your files: Synchronize to coordinate changes to other files with the files on your computer.▫ Cradle (or attach it to the

computer using a USB cable)▫ Touch a “sync” button to

begin the process of data transfer Updates both sets of files to

the most current session. ▫ Bluetooth enabled.

A small chip that allows you to transfer data wirelessly to any other Bluetooth-enabled device

• An infrared (IrDA) port that transmits data signals using infrared light waves.

• Use the infrared port and “beam” data directly across to transfer data between two devices▫ Could just point their device

at yours and send you the file.• If your device is Bluetooth

enabled, you can send it directly as well. ▫ Not restricted to line of sight

between the two devices to communicate.

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Wearable Computer

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What is Haptics?

• Haptic effects (touch or tactile feedback)▫ Actuators built into devices

to create vibrations Feel of a button click Gun recoil (gaming) Make screen feel like fur

▫ Produce a sense of realism▫ Improve the user experience▫ Found in mobile phones,

tablets, gaming controllers▫ Saved as resources to be

used in games

Touch Screens Touch Back

Vibrations to confirm data input

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So many ways, so little time . . .