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Tony's Updates

Regularly updated whenever there is classwork to be completed.

League tables

posted Sep 14, 2009, 3:30 PM by Unknown user   [ updated Sep 14, 2009, 3:50 PM by Eddie Woo ]

In education, league tables compare the academic achievements of different institutions.
 
 For  Against
The tests used to assess and rank the schools are narrow and does not assess the full range of literacy and numeracy skills of students, thus the data may not be accurate or integrous. [sp?]
Students in lower ranking schools are demoralised as privacy may be breached
The funding used to rank the schools could be actually used to help the disadvantaged schools
The information released in the form of league tables can mislead the population by publishing misleading information or by stereotyping
League tables are not necessary as government and education departments already have detailed information on the performance of schools.

Trial HSC Exam Review

posted Sep 7, 2009, 3:14 PM by Unknown user   [ updated Sep 7, 2009, 3:51 PM by Eddie Woo ]

Section A
 
6) The answer is NOT SQL but QBE (Query by Example), where there's a form and you fill it out and a SQL command is generated based on what you input. It is therefore faster than SQL itself. However, we didn't really cover QBE.
9) Correct answer is actually C). I assumed the video file was downloaded first (via streaming) and then played back, which would be a limitation of mobile phone speakers but in reality it was not the case as the user would be watching as they are downloading.
 
Section B
 
21)a) (ran out of time) Did not manage to finish "Describe one ethical issue" and only managed to complete the social issue. I'd assume that's where I lost my mark (2/3) and I got full marks for the first part.
b) Not enough discussion/explanation on various parts of the system. The participants are NOT just the runners. Talk about the software about the system.
c) Major case of DNAQ. Should talk about what the criteria would consist of to MEASURE the success of the new system. Did not discuss enough about what parts of the system could be used to determine the success of the system.
 
Section C
 
21) i) Somehow stupidly wrote 2^24 as opposed to 24 (I should read over what I write). However, one thing I would've forgotten to do is convert bits to bytes. I did, however, remember to convert the file to bytes and then to kilobytes.
ii) Always relate the answer to the actual image. That is all.
22) b) Do not describe what multimedia analysis and their functions but just talk about the hypermedia elements (text, audio, hypertext, audio, images, video). Wasted too much time here but got full marks.
c) Watch the colloquialism.
d) Also watch for colloquial language.
 
 

Question 21 - 2006 Past Paper

posted Aug 31, 2009, 8:59 PM by Unknown user   [ updated Aug 31, 2009, 9:00 PM by Eddie Woo ]

Search Algorithms

posted Aug 3, 2009, 9:56 PM by Unknown user   [ updated Aug 3, 2009, 10:05 PM by Eddie Woo ]

The search engines used:

google
ask.com
altavista
bing
yahoo
 
The search phrase I used was: "the china is bigger than the france"
 
The results for Google:
 

The results for Ask:
 

Knowledge Engineering

posted Aug 3, 2009, 3:37 PM by Unknown user   [ updated Aug 3, 2009, 3:51 PM by Eddie Woo ]

Processing & Decision Support

posted Jul 29, 2009, 8:44 PM by Unknown user   [ updated Jul 29, 2009, 8:52 PM by Eddie Woo ]

Fitness DSS

posted Jul 29, 2009, 8:18 AM by Unknown user   [ updated Jul 29, 2009, 8:19 AM by Eddie Woo ]

Attached.

Practice questions

posted Jun 18, 2009, 5:29 PM by Unknown user   [ updated Jun 21, 2009, 3:43 AM by Eddie Woo ]

Just to get you started!
  1. Describe situations in which each of the major network topologies would be the most appropriate.
  2. Converting a large organisation's information system from a wired infrastructure to a wireless infrastructure is a costly exercise. Identify specific costs involved and justify the conversion in spite of the cost.
  3. The internet used to be called "cyberspace", which alluded to the fact that things and people on the internet inhabited another world and had no relation to the real world. This is simply no longer the case. Discuss this reality with reference to real events that have been changed or made possible only by the use of the internet.
1. The six network topologies and when they are appropriate are:
 
Star - Useful for networks where a connection to every single node to another node is not necessary. For example,  the central server can also relay print tasks to the print server easily while in a bus, ring or mesh network this would have to travel across all the cables just to reach that print server.
Ring - Ring networks are useful for small private networks where a central server is not necessary and communication between the nodes results in minimum amount of cabling but at the same time data collision is not desired. Small amounts of cabling is required, in fact, only one cable is required to join each neighbouring nodes together. In a ring network the traffic is controlled by using tokens so no collisions of data traffic is experienced.
Bus - Bus networks are also useful for small private networks.
Mesh -
Tree - Useful for large corporations where worker computers do not need to be connected to the main computer for files or services. For example, if a document needs to be printed it needs only connect to the print server. If the connection is cut only the nodes in that path of a hierarchal tree is affected. This reduces cabling and when the cable is damaged it can be fixed quickly because the damage is easily located.
Point-in-Point - A direct connection between two nodes. For example, if for some reason a client wants to talk to another client directly a point to point connection is better because the cabling is at its minimum and a central server isn't necessary for the task. Since no other nodes are necessary for communication between the two nodes point-to-point is the bset option.

Artificial Intelligence

posted Jun 17, 2009, 6:02 AM by Unknown user   [ updated Jun 17, 2009, 6:33 AM by Eddie Woo ]

Advantages:

1. Can handle more data more efficiently - instantaneously.
2. 'Sleep is for the weak'.
3. Availability - can serve multiple users simultaneously. Remains available past human lifetime.
4. Consistency - same decisions can be made without any inconsistencies.
5. There is a clear logic - comes out of preprogrammed rules.
6. They never forget things when making decisions.

Disadvantages:

1. They lack common sense and intuition.
2. Cannot make creative responses.
3. Limited by what it is given (the knowledge). It is, in essence, limited to its knowledge base. Since it cannot learn it needs to be constantly updated.
4. Does not adjust or adapt to certain situations.


Notes - Artificial Intelligence

posted Jun 15, 2009, 3:31 PM by Unknown user   [ updated Jun 15, 2009, 3:38 PM by Eddie Woo ]

Note: EXPERT SYSTEMS DO NOT LEARN!!!!!!~@!#$@

How Expert Systems Work

Expert Systems have a KNOWLEDGE BASE of rules (domain-specific, heuristics) that gives situations and hence inform decisions.

Advantages:

1. Can handle more data more efficiently - instantaneously.
2. 'Sleep is for the weak'.
3. Availability - can serve multiple users simultaneously. Remains available past human lifetime.
4. Consistency - same decisions can be made without any inconsistencies.
5. There is a clear logic - comes out of preprogrammed rules.
6. They never forget things when making decisions.

Disadvantages:

1. They lack common sense and intuition.
2. Cannot make creative responses.
3. Limited by what it is given (the knowledge). It is, in essence, limited to its knowledge base. Since it cannot learn it needs to be constantly updated.
4. Does not adjust or adapt to certain situations.

Remember: Expert systems are designed to mimic a human expert. So why would you mimic a human expert when there already is a human expert?

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