Classes of Communication Technology IOT POLY ENGINEERING 2-4 Classes of Communication Technology DEFINITIONS: Print Graphic Communication Visual, lingual messages that include printed media Photographic Communication Using photographs, slides, or motion pictures to communicate a message Telecommunications Communicating over a distance Technical Graphic Communication Specific information about a product or its parts Size and shape, how to install, adjust, operate, maintain, or assemble a device

Classes of Communication Technology IOT POLY ENGINEERING 2-4 Classes of Communication Technology EXAMPLES: Print Graphic Communication Newspaper, poster, brochure, billboard Photographic Communication Photographs, slides, motion pictures Telecommunication Radio and t.v. broadcasts, computers, mobile and satellite Technical Graphic Communication Engineering drawings (sketches, drafting, CAD)

Matching Classes 2-4 Print Graphic Communication IOT POLY ENGINEERING 2-4 Matching Classes Print Graphic Communication Photographic Communication Telecommunications Technical Graphic Communication 3 1 2,3 2 Telephone Headphones Book Computer Videotape Remote Control DVD Painting Magazine Camera Photograph Comic Strip Newspaper Billboard 3 2 1,2

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Major Processes: Relief A modeled work that is raised (or lowered) from a flat background. Cuneiform by the Sumerians ~6000 years ago. Wood block printing ~200 C.E. Movable type printing ~1040 C.E. (Gutenberg ~1450) Intaglio (in-tal-yo) ~1430 Rotary printing press ~1843 Lithography (offset printing) ~1796 The source and destination are not on raised surfaces Grease and water do not readily mix A chemical process Most modern books and newspapers Intaglio (in-tal-yo) 2. The plate is covered in ink By 593 A.D., the first printing press was invented in China, and the first printed newspaper was available in Beijing in 700 A.D. It was a woodblock printing. And the Diamond Sutra, the earliest known complete woodblock printed book with illustrations was printed in China in 868 A.D. And Chinese printer Bi Sheng invented movable type in 1041 A.D. in China. 3. Excess ink is removed from surface 1. Depressions cut into printing plate Print Graphic Communication 4. Paper placed on plate and compressed 5. Paper is removed and ink has been transferred Low Relief Cuneiform High Relief

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Screen Printing (~1000 C.E., China; 1907 England) Mainly billboards, package labels, fabric designs Uses a woven mesh (a screen) to support an ink blocking stencil. The stencil forms open areas of mesh that transfer ink as a sharp-edged image onto a substrate. A roller or squeegee is moved across the screen stencil forcing or pumping ink past the threads of the woven mesh in the open areas. Electrostatic (1938 / 1960s) Photocopier, Laser Printer Opposite charges attract Ink Jet (1980s) Use a series of nozzles to spray ink directly on paper Print Graphic Communication

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Photographic Communication The process of using photographs to communicate a message Photography – capturing light on a light-sensitive material such as film or electronic sensor As a usable process, 1820s Includes photographs, slides, and motion pictures Photographic Communication http://www.smartstudentsinc.org/

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Telecommunication Communicating over a distance Tele – Greek, “far off” Communicare – Latin, “to share” Rely on the principles of electricity and magnetism 2 types: Hardwired systems (telephone, cable, fiber-optic) Broadcast systems (radio and t.v., mobile phones) Point-to-point: One transmitter and one receiver Broadcast: One powerful transmitter to numerous receivers Telecommunications

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Smoke signals and drums Chains of beacons (Middle Ages) Navigation signals Enemy troops approaching Homing pigeons Carrier pigeons used as early as 1150 in Baghdad Olympic victors, Greece; Stock options, Europe Optical telegraph (semaphore, 1792, France) Towers with pivoting shutters Information encoded by the position of the mechanical elements Telecommunications

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Telegraph (mid 1830s) First instrument used to send messages by means of wires and electric current A device interrupts the flow of a current through a wire Uses shorter and longer bursts of current to represent letters Device at receiving end converted electrical signal into clicks Operator/mechanical printer converted clicks into words Telegram – wires over land Cable – wires under water Telephone (1876 – Bell and Gray) Greek: tele – far, phone – sound Telecommunications

IOT POLY ENGINEERING 2-4 Play Morse Code Video Telecommunications

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Broadcast Radio (1893 – Tesla, 1901 – Marconi) Television (1925) Greek: tele – far, Latin: visio – seeing 4 main parts (cathode ray tube) Electron gun fires 3 beams Steering coils move electron beam across screen Phosphorus screen has over 200,000 pixels Glass tube holds it all together Signals are broadcasted like radio signals Telecommunications

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Computers Internet Cellular Local Area Networks Satellite Communication Telecommunications

Communication Technology IOT POLY ENGINEERING 2-4 Communication Technology Engineering Drawing / Technical Illustration Communicates specific information Size and shape How parts are assembled How to install, operate, adjust, maintain a device Hand methods Sketching Drafting Computer methods CAD (AutoCAD, Sketchup, Inventor, ProEngineer, etc.) Technical Graphic Communication