Transcript EDUC 9G00-9G10

EDUC 9G00-9G10
Communications Technology
Additional Qualification
Some Definitions
Communication
The sending and receiving of messages.
In order for communication to take place, the
message must be sent, received, and
understood.
Types of Communication
Human-to-Human communication
Having a conversation, sign language, semaphore
Human-to-Machine communication
Talking on the phone, renewing driver’s license on the computer
Machine-to-Human communication
Alarm clock waking you up
Machine-to-Machine communication
Computer Network
Supplementary Communication
ESP, etc.
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Communications technology programs must include the study of electronic,
live, and graphic communications; a course must focus on two or more of
these topics.
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"Electronic communications" could include the study of television
production, editing, and transmission (air wave and cable); audio recording
and amplification; and communication devices such as telephones, fax
machines, and computers. The transmission and receiving of
communications signals using radio waves, line-of-sight signals,
microwaves, satellites, fibre optics, cable, or any other means are relevant
parts of the study of electronic communications systems.
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"Live communications" could include the study of photography (moving
and still) and stage productions. Lighting, art work, carpentry, and other
design aspects of the process of creating illusions and functional
environments for live communications systems may be included.
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"Graphic communications" could include the study of print materials,
desktop publishing, computer graphics, drafting methods, and printing
systems.
Broad-based Technological Education
Curriculum Guidelines, Grades 10,11 and 12
Media
Plural of “Medium”. Refers to the “carrier” (vehicle or
container) of the message in a communication.
Eg. Books are “paper” media. Disks and tapes are “magnetic” media. CD-ROM
is “optical” media. Electronic storage devices like USB pen drives and cards for
digital cameras are “Flash” media.
In computer networking, the cables that connect the machines together are
referred to as “network media”.
Media (more specifically, News Media, but often shortformed) also refers to
providers of news information (newspapers, radio, television).
Mass Media
Those media that reach large numbers of people. Their development is one of our
modern society’s defining features. Usually categorized as follows:
Print – books, magazines, newspapers
Broadcast – radio, television
Outdoor – billboards, bus shelters
New media – based on emerging technologies.
common usage, the www is still “New media”.
Though now 10+ years in
Analog vs. Digital
An analog or analogue signal is any variable signal continuous in both time and
amplitude.
A digital signal is a representation of a reality that has been converted into
numeric information that can be stored and/or acted upon by a computer.
Analog signals differ from digital ones in that small fluctuations in the signal are
meaningful, so it’s capable of communicating more information. However, it is
susceptible to “noise” and degradation when copied – “generational loss”
The “Digital Revolution”
The Digital Revolution describes the effects of rapid drop in cost and ongoing
improvement of digital devices such as computers replacing or emulating analog
devices, enabling formerly unthinkable innovations like the World Wide Web
(WWW). It includes changes in technology and society, and is often specifically
used to refer to the controversies that occur as these technologies are widely
adopted.
This transformation began in the early 1980s and will probably continue to
change the world until the 2010s.
Wikipedia.
Visual Communications
“A picture is worth a thousand words” – people are visual creatures. One of the
most important things that the Digital Revolution has brought is the ability to
manipulate and distribute pictures.
The premiere photo editing software in the world is Adobe Systems’ Photoshop.
Created by two brothers, one a University student and one an employee of the
now famous Industrial Light and Magic. It was first released in February 1990,
and revolutionized the publishing and print production industry. It is now the
standard photo editing tool in the world. Almost every single photo that makes it’s
way into print has been touched by Photoshop.
There are other photo editing packages, some more powerful, and most more
economical.
Photoshop Elements (a stripped-down, but still really functional version of the
software, is available to Ontario Schools via OSAPAC. Teacher take-home rights
are included.
Some Photoshop Samples
• Greg Apodaca Sample Advertising Images
Created in Photoshop
• From Emmet Lollis Tutorial
For a tutorial on how to make this , visit
http://www.emmettlollis.com/tutorials/photoshop/making-the-mothership.asp
The Best use of Photoshop
• One bastion of Photoshop photo
compositing (putting together more than
one image to create a new picture) rises
head and shoulders above the rest.
• You need not look at any other images.
• Completely supports curriculum
expectations.
• May one day replace teachers are the
providers of education in our society.
Vector vs. Raster
Vector Images are made up of lines.
Images are small and can be blown up many, many times without showing loss
of detail.
Ideal for technical drawings, cartoons, etc. Incapable of showing “photorealism”
without superhuman effort.
Raster Images (also called bitmaps, not to be confused with the .bmp file
format in windows, which is a specific type of raster graphic) are made up of
dots. Each dot, or pixel, contains colour information. Raster images are
excellent for capturing photo-realistic information. They are the type of image
created by digital cameras, video cameras, and computer scanners.
Vector vs. Raster
A painstakingly created vector
image.
A detail from the above, as a vector.
The same detail, showing
pixellation common to raster
graphics at too much zoom.
Thanks again, Wikipedia
Resolution
Pixellation is why, time and time again, students will steal a graphic off of the
WWW, print it out, and it will look terrible.
Resolution is the relationship between the number of dots in an image and the
amount of space it takes up. The resolution needed to display something on your
computer monitor is 72 pixels per inch, abbreviated ppi. To print it on a laser
printer, it needs to be at 150 ppi. For photographic reproduction, a resolution of
300 ppi is required. Any less, and the image starts to break up (Pixellate).
Remember (and remind your students constantly) that resolution is a ratio.
Double the number of inches, half the number of pixels.
File formats
• PSD – Photoshop Document. Proprietary
format, useful only in Adobe software.
Contains most information – including
layers, etc. Large file size.
• JPEG – Joint Photographic Experts
Group. Generic file format, gives good
compromise between amount of
information and smaller file size.
File Formats Cont’d
• PDF – Adobe Portable Document Format.
Designed by Adobe to allow users to
distribute documents in uneditable form.
Most Adobe applications will write them.
Adobe Acrobat will generate them from
any application that utilizes Windows
printing. Your Photoshop Elements
tutorials are in this format.