Class Notes (809,049)
Canada (493,506)
IAT 267 (14)
Lecture 2

IAT 267 Lecture 2 Notes

4 Pages
Unlock Document

Simon Fraser University
Interactive Arts & Tech
IAT 267
Helmine Serban

Input, Output, and Transduction - Basic Electricity Concepts Office Hours on WebCT Technological Systems Review: 1.Iterative design 2.(Space/Time) Trade offs - cannot ever make perfect sol'n? 3.Controlling complexity - abstraction and modularity 4.Multiple domains - real-world contraints 5.Positive and negative feedback Our focus is computer systems (including embedded systems) Key concepts of computer system: 1.Given enough time and memory, any computer system is able to solve the same problem 2.Transition between levels - need to transition from user problem (in natural language) into circuits and devices Goals for today: How we interact with computer systems Elements of interaction Tools we will use in this class Electricity concepts Interaction w/ Cmpt Sys: Elements envisioned when thinking of cmpt sys: monitor, tower, mouse, keyboard But what if we need other forms? Different functions would require different forms. Ie, can't take this running. So, think of computing - goes beyond computer system itself. Tool to help us with our purpose So, can take any form that would fit our needs! As a medium: Offers us processing capabilities. Can store sound and images. Good for mass replication, store more in physical space then tapes, in tapes, must go in order. In cmpt sys, can access that media in order desired (random, non-seq access possible) Reduces barriers of time and space - networking between computers allows us to share data with devices far away much easier Create more complex relationships between sensed events and caused events - richer interactions! Ex, system that lowers the blinds when it is sunny Elements of interaction Have sensed event and caused event Both part of physical world In the middle we have computing, which enabled rich interaction - not part of physical world, electrical, binary Must transform from physical world into something that the computer can understand (virtual world), then back into physical world Transduction enables this Transduction is the conversion of one form of energy into another Example: physical energy becomes electrical signals so computer can understand it Must find device that can do this transformation (transducers - convert between physical and electrical energy) What is interaction? "An iterative process of listening, thinking and speaking between two or more actors" - Chris Crawford, game programmer Can apply this definition to computing Listening: Input - getting/accepting data/input from other actor Thinking: Processing Speaking: Output Input: Get info from environment/physical world Sensing some event Typically less energy, considered easier Output: Respond to event Do some action - movement, change in state, sound, light, etc Typically more energy, considered more difficult Often requires electrical and mechanical skills Digital and Analog: Digital: 2 (at least, limited) possible states (0,1) Analog: continuous range of multiple states - most things in real world are of analog nature Parallel and Serial: How input/output flows over time Example: present ideas one after another in conversation -> serial Present many different ideas at same time -> parallel Events happening one another another = serial Events happening simultaneously = parallel Important to
More Less

Related notes for IAT 267

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.