Mobile Computing

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24 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Mobile Technology

By:

Stephanie Budd

Mike Celentano

Aaron Lastoff

Mobile Computing


The ability to use
technology
“untethered”


Not continuously
connected to the base
or central network



Requires that mobile
computing activity be
connected wirelessly to
and through the internet
or to and through a
private network


Ties the mobile device to
information through the use
of battery powered,
portable, and wireless
devices

History of Mobile Devices


Radio transmitters and wireless
communications systems were base
stations, operated at fixed locations, with
large antenna towers


1950’s


12 volt automotive electrical
systems gave rise to 12 volt devices such
as two
-
way radios and mobile rigs

History of Mobile Devices
(Cont.)


Companies such as Motorola sprung
up to support the need for mobile
devices


-

Such as taxicab radios, police radios, and
trunk mount systems


Today there is a wide variety of mobile
computing platforms





Mobile and Portable


Mobile



-

Vehicular



Today there is a fuzzy
boundary between the
two


Many small handheld
phones and computers
will operate on12 volts



Portable


Wearable or
handheld



There is a proposal
to have these two
connect by wireless
ad
-
hoc networks

Wireless Technology


Day to Day transfer of information is
increasing rapidly and new developments
are continually expanding


Even so, majority of technology doesn’t
provide as much bandwidth or accessibility as
landlines


Transmission range for wireless is usually
related to the data transmission speed


The further the wireless signal has to travel


the
less data it can carry per second

Wireless Technology (Cont.)


Most advanced developments of wireless
broadband deliver downstream data



Satellite communications


Good transmission rates, but the cost is too
high, typically $1,000 or more



Security



Physical devices along with the data
has to be protected


Difficult problem


Poorly designed communications
protocols


Raises the issue of how much information
employees are allowed to carry and what
procedures to follow so information
doesn’t get stolen

Mobile Users


Mobileer


One who uses mobile
communications
devices


Three types:

1.
Telecommuters who work
away from office but stay
directly connected to it from
a remote location

2.
Casual telecommuters and
other workers who work a
few days per month outside
the office

3.
Predominantly mobile
employees


A Few Mobile Devices


Laptop computers


PDAs and handheld PCs


Calculators


Pagers


Smart phones and cell phones


Task devices


Bar code scanners

Laptop Computers


A brief history


The first laptop?… maybe


1979 by William Moggridge


Used by NASA on space shuttles in the 80’s


340K byte bubble memory


Die cast magnesium case


Folding electroluminescent graphics display screen


1/5 the weight of any model equivalent in performance

Gavilan Computing


First promoted laptop


Manny Fernandez was the founder of Gavilan
Computers


In 1983, it was considered the first fully
functional laptop computer


Good for executives

The Osborne 1


First true portable computer


Created by Adam Osborne in 1981


It weighed 24 lbs and cost $1795


5 inch screen


Modem port


Two 5 ¼ floppy drives


Large collection of software


Battery pack

More Laptop Firsts


1981
-

Epson HX
-
20


Battery powered


20 character by 4 line LCD display


Built in printer


1983
-

TRS
-
80 Model 100


Created by Bill Gates & Kazuhiko Nishi


4 lb battery operated portable computer


Flat, more of a lap top design

Even More of Laptop Firsts


1989
-

Macintosh Portable


Produced by Apple


Later evolved into Powerbook

How Laptops Work


The Microprocessor


Internal instructions
stored in memory


Access its own
memory





Receive instructions
from you


Keyboard


Mouse


Touchpad


Trackball


Display data to you


Cathode ray monitors


LCD displays




How Laptops Work (cont)


Receive data through storage devices


Hard drive


Zip drive


CD/DVD drive


Sends data to:


Printers


Modems


Networks


Powered by AC or batteries


Disk Drives


Internal hard disk drive


6 to 20GB


Stores:


Operating systems


Application programs


Data files


Laptops have less space than desktops

What Laptops Can Do


There are many fields
of use for laptops


Education


Presentations


Note taking


Laboratories


Entertainment (CD,
DVD, mp3)


Law Enforcement


Astronomy (CCD)


Navigation (GPS)


Business


PDA’s


Personal Digital
Assistant


Serves as an
electronic
organizer/day planner


Capable of sharing
information with you
computer



An extension of a
PC… not a
replacement


Manage personal info


Can connect to:


Internet


GPS


Can run multimedia
software


Uses of PDA’s


Manage Personal
Information


store contact
information (names,
addresses, phone
numbers, e
-
mail
addresses)


make task or to
-
do lists




take notes


write memos


keep track of
appointments (date
book, calendar)


remind you of
appointments (clock,
alarm functions)


plan projects


do calculations


keep track of expenses

More Uses For Select Models


Send or receive e
-
mail




Do word processing




Play MP3 music files




Play MPEG movie files




Get information (news, entertainment, stock
quotes) from the Internet




Play video games




Integrate things such as digital cameras and
GPS receivers



The First true PDA?


1978
-

LC
-
836MN


Made by Toshiba


Robert Hotto & Judah Klausner


Main purposes


Store memos


Store phone numbers


836 led the way for the future

How Do PDA’s Work


Parts of a PDA


microprocessor


operating system
-

tells microprocessor
what to do


solid
-
state memory


ROM chip





batteries


life
depends on types of
usage


LCD display



65,536 colors, 160 x
160, 240 x 320


input device


Mini keyboard, touch
screen, stylus


input/output ports



data synchronization


History of Calculators

Origin


First calculator was
invented by the Chinese
called the Abacus


Was first built within the
year 3000 BC


Was widely used by
merchants and clerks.

History


Wilhelm Schickard


First to build automatic
calculator


Was built in 1623


Called it the
Calculating Clock

History


French Philosopher
Blaise Pascal


Created the Pascaline
in 1642


Uses


Thought his machine
could save labor and
time.


Also used for taxes

History


Charles Babbage


“Father of Computing”


Had the first
successful automatic
calculator and is
known for his
precision in
engineering

Time Goes By. . .

Scheutz Calculator
-

1853


Baldwin Calculator
-
1873


Brunsviga Type A
-

1892


American Arithmometer
-

1898


Finally the 1900’s


IBM 1954


Comes out with all transistor calculator.


1957 release first commercial all transistor
calculator


IBM 608


1961 Bell introduces the Punch/Sumlock

Comptometer
-

ANITA

Technology Gets Better!


Not only was technology better but cost
more too!


These machines usually ran $2200
-

$2500


This included a thirteen digit capacity


Average desktop weight was 55lb
-
100lbs


Could Add, Subtract, Multiply, Divide, and
sometimes do square roots.

First hand held calculator


Introduced in January 1971


The Sharp EL
-
8


Weighed one pound


Used a vacuum fluorescent display


Rechargeable batteries


Sold for $395

Scientific Calculators


First pocket


Hewlett Packard with the HP
-
35


Used RPN (Reverse Polish Notation) or
Postfix Notation.


Texas Instruments also introduced the SR
-
10

Upgrades


The scientific calculators were introduced
to
Continuous memory
.


Data was retained after calculator was shut off.


First calculator capable of symbolic
computations was the Hp
-
28


First graphing calculator was the Casio
fx700G

Present Day Calculators



In 2002, HP
announces they will
no longer make
calculators anymore


Texas Instruments
will capitalize on their
sleek design of the
new graphing
calculators

The Basic Calculator


Basic Calculators include


Battery or solar powered


Display
-

LED lights or
Liquid crystal with 8
-
10
digit display


Electronic circuits



Keyboard display


Ten digits


Equal sign


Four arithmetic functions


Cancel or clear button


On and off


Square root and percents


Can be found in


Cell phones


Pagers


Wrist watches


Local stores


Sophisticated Calculators


Include same functions as basic


Support


Trigonometry


Statistics


Graphs


Algebra


Equation solvers


Financial models


Scientific notation


And holds Games

Leading companies


Sharp


Casio


Hewlett Packard


Texas Instruments

Mobile Technology

By:

Stephanie Budd

Mike Celentano

Aaron Lastoff