computer technologies & the modern world 251111 internet and online community
TRANSCRIPT
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COMPUTER TECHNOLOGIES & THE MODERN WORLD251111 Internet And Online Community
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WHAT IS TECHNOLOGY?
• Defined• “practical application of knowledge”• “the use of science in industry, engineering, etc.”• “a machine, piece of equipment, method, etc.”• “the collection of tools, including machinery, modifications, arrangements
and procedures used by humans”
• Greek Origin• Techne - "art, skill, cunning of hand“• -logy – “a combining form used in the names of sciences or bodies of
knowledge”
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AND COMPUTER TECHNOLOGY?
• The Computer• Programmable device that can carry out arithmetic or logical operations• Conventionally consisting of a processor & memory
• (to help us use them we connect input and output devices)
• So Computer Technology in the Modern World?
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THE EVOLUTION OF COMMUNICATION
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EARLIEST COMMUNICATION
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SPEECH
Sets Humans apart from animals
Estimated 1.5million-200,000 years ago
Mutation of the FOXP2 gene
Facilitated transfer of knowledge through generations
Forms the basis of written languages.
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PROGRESS TOWARDS WRITING
Symbols
Allow message longevity but represent speech acts
Cave Paintings
Oldest date from around 30,000 BC
Petroglyphs
Around 10,000 BC carving developed to make incisions into rock surface
Pictograms
While Petroglyphs show a single scene, Pictograms narate a story
Ideogram
Ideograms represent concepts such as emotions
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WRITING
Around 2-3,000 BC the Sumerians developed the first writing system.
Evolved from Pictograms
Developed into Cuneiform
Around 1,000 characters -> 400 characters (Hittite
Cuneiform)
Symbols pressed into clay
Egyptian Hieroglyphs were derived from Sumerian writing.
"It is a complex system, writing figurative, symbolic, and phonetic all at once, in the same text, the same phrase, I would almost say in the same word." (Champollion)
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DEVELOPING AN ALPHABET
Egyptian Hieroglyphics were logosyllabic, i.e. symbols stand for;
Words
Sounds
or to place a word in a category
The Phonetic components of Hieroglyphs were crucial to developing an alphabet.
The Egyptians developed a set of 22-24 Hieroglyphs which were used to record foreign names etc.
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PROTO-SINAITIC
Also known as Proto-Canaanite
Around 2,000-1,700 BC
Migrant workers translated Egyptian Hieroglyphs into the Canaanite language
E.g. The Egyptian "Pr" (or Per), meant house
(or Floorplan). This became "bayt", which
was Canaanite for house.
Acrophony is when a letters name begins with the letter itself.
Bayt ---> "Bet" ---> "Beta" ---> "B"
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SPREADING THE WORD
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THE GREEKS
Vowels were a hindrance when writing in Pheonician, (as well as Egyptian / Hebrew).
But in Greek they were essential, and afforded equal status as consonants.
Together with the "Latins" (Romans) the alphabet evolved into this!
Other tribes evolved their alphabets differently, but most stem from the Proto-Sinaitic.
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TECHNOLOGY?
What technology have we discussed so far?
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THE PRINTING PRESS
105AD - Chinese invent paper
The Chinese also developed wood-block printing, and books with hard covers and movable type (circa. 1041).
However, Chinese has thousands of characters, so traditional block printing was still preferred.
~1440 - Gutenburg 'invented' the printing press
Ability to mass print books.
Whereas before it could take a monk 20 years to transcribe the bible
Gutenburg combined a variety of mechanical technologies to perfect his invention.
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THE PRINTING PRESS
Gutenburg was named #1 person of the millennium by A&E Network & Time Life.
Ahead of;
Christopher Columbus Freud
Galileo Galilei Einstein
Shakespeare Lincoln
Newton Darwin
Da Vinci Beethoven
Why did this technology invention have such a great impact?
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TELECOMMUNICATION
Transmission of signals over a distance, for the purpose of communication.
Visual, Audio (and later electronic)
Fires
Beacons
Smoke Signals
Drums
Horns
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TELECOMMUNICATION
The Problem:
How do we use fires / beacons / smoke signals to send a message;
Consider the fire beacons in Lord of the Rings.
N0 FIRE = No Problem
FIRE = Problem!
The Solution:
Semaphore
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HYDRAULIC TELEGRAPH
Circa 400BC
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SEMAPHORE
France 1792.
2*2m long arms with 7 positions
1*cross bar with 4 angles
7*7*4 = 196
196 different symbols
556 stations following line of sight
Total distance 4,800km
Paris to Lille = 15 stations / ~32 mins
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SEMAPHORE
Sweden -->
UK
Germany -->
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ELECTRICAL TELEGRAPH
The presence and flow of charge
Electrons & Protons
Very Fast
Early versions used a grid like this->
Later Morse invented his code.
This pre-dates Optical Semaphore
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ELECTRICAL TELEGRAPH
Requires 'wires', which is a problem particularly at wartime.
Maxwell: "We have strong reason to conclude that light itself is an electromagnetic disturbance in the form of waves propagated through the electromagnetic field."
Marconi demonstrated that communication is possible wirelessly
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TELEPHONE, TELEVISION...
1876: Bell demonstrated the telephone
Now the wires can talk.
Combine this with Marconi, and the airwaves start to sing - we have radio.
Add some pictures & we have a TV.
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TO THE COMPUTER
• Input
• Processing
• Output
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EVOLUTION OF INPUT DEVICES
• Punched Cards – early 1950s
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KEYBOARDS
• What is the legacy of the typewriter?
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THE MOUSE
• Direct Interaction at last!• Evolved from mechanical wheels, to balls,
to optical
• The opportunity for a GUI• WIMP
• Windows, Icons, Menu, Pointer
Sandstein
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TOUCH BASED INPUT
• Predates Mouse• So why did the mouse
take off first?
• Stylus Input• Grown more popular with
more recent tablets
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MOBILE INPUT
• 1 step forward, 2 steps back!?• Multiple Key Presses?
• Eventually T9• Miniature keyboards?• Predictive Text & Auto correction! LOL• The introduction of Netspeak
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MULTI-TOUCH & GESTURES!
• Even more direct interaction!
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WHAT ABOUT NOW?
• Non-Touch Gesture Based Interactions• Consider Minority Report?
What next?
No need to gesture?
Thought based interactions?
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OUTPUT EVOLUTION
• From CRT to LCD to Plasma• Desk Space• Resolution• Refresh Rate• Style!
• But… do we need a ‘screen’?
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DIFFERENT SIZE SCREENS
• The Inch, The Foot & The Yard?
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3D PROJECTION
• Holograms?
• Retinal implants?
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QUOTE
• “Having tasted the benefit of interconnection, we will continue the process until virtual reality is "real reality". That is, our senses will no longer be limited to the here and now. The ultimate user interface will be a direct neural stimulation and output. Our eyes will become cameras and our ears, microphones. We will touch, taste, and smell remotely. We will share direct brain-brain links, achieving "mind-meld" with others.”
Steve Czarnecki (Lockheed Martin)
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NON-VISUAL OUTPUT?
• Sounds!• Much Higher Quality Speakers!• But how about distributing sounds?• OR, NOT distributing sounds?
• Smells?
• Touch?
• Taste?
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CONTEXT AWARE COMPUTING
• Sensing context from the environment to determine correct responses.• If I walk into a room and it senses my presence
• “Where” • “Who”
• How about sensing other things?• When am I doing something?• What am I doing?• Why am I doing it?
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10 BREAKTHROUGH TECHNOLOGIES 2014
1. Agricultural Drones
2. Ultraprivate Smartphones
3. Brain Mapping
4. Neuromorphic chips
5. Genome Editing
6. Microscale 3-D Printing
7. Mobile Collaboration
8. Oculus Rift
9. Agile Robots
10.Smart Wind & Solar Powerhttp://www.technologyreview.com/lists/technologies/2014/