Notesale: Turn your study into money

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General Notes
9/08/16
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How does a CCTV system work?
Multiple cameras have cords that send moving images to monitors, which is stored on a disk drive
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How is data collected and stored and accessed?

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What are some of the advantages (and for whom?)
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It might
lead to over population of prisons, especially if you're in a really shady low-income country,
athough this might not happen
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6 The digital divide and equality of access
The growth of the use of IT systems has led to disparities in the use of, and access to, information
technologies
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This may lead to groups or individuals without access to IT being
disadvantaged
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17/08/18
Distributed Systems & Autonomous Agents
Comparison Table of Centralized vs Distributed
Centralized has one main source
Distributed they hae their own points of processing, share data but not programing and processing
resoources
Distributed
Software on a central system runs on a mainframe
In a distributed system, think about it as an autonomous agent that is sharing
Consists of autonomous gents that are acting as part of a large envneronemtn
Centralized

Distributed

Topic 7 Page 1

• One component with non-autonomous parts
Component shared by all users all the time
All resources abailable
Software runs in a single process

Single point of control
Single point of failure
Pros and Cons of distributed computing

Pros

Cons

Costs - cheaper than
running a supercomputer

Network Bandiwdth - bottlenecking can
happen if a lot fo data is being ransferred at
once

Perofrmance - if sufficient
computers are connected,
performance is far greater
than a supercomputer

Security - if a projcet has potentially
sensitive information included it can
potentially cause a security breahc

Reliability - if one or two
computers go offline it is
not going to have a huge
effect on the overall
processing of information
because all the other
comptuers are still online
and running the analysis

Softwware complexity - software has to be
written for the project and the sofware may
put peple off if it comes across too
complicated

Socalalbility - it is very easy
to increase the amount of
processing power due to
the nature of the software
Autonomous Agents
An autonomous agent is an inteilligent agent operating on an owner's behalvf but without any
interference of that ownership entity
It could be hardware or software that carries out some set of operaions on behalf of a user or
another program with some degree of independece or autonomoy that does what the user wants it
to do
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autonomous robots, computer viruses, artificial life
Features of an autonomos agent
Autonomy - agents activiate alone f roa atask and are not invoked

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