Recursion

A few resources on recursion:

For a further explanations, animations and exercises, check the following links:

• http://ice-web.cc.gatech.edu/ce21/1/static/JavaReview-RU/Recursion/rTraceMethods.html
• http://www.animatedrecursion.com/
• simple and intermediate recommended
• http://interactivepython.org/runestone/static/JavaReview/Recursion/recursionbasics.html
• http://introcs.cs.princeton.edu/java/23recursion/

Control and Embedded Systems

Control Systems
An HL topic for IB Computer Science that brings many questions (especially why on earth are we doing this) is Control. The best resources for you to study and revise is this:

• http://www.electrical4u.com/control-system-closed-loop-open-loop-control-system/

Positive and Negative Feedback
Recommended resources:

• https://en.wikipedia.org/wiki/Positive_feedback *
• https://en.wikipedia.org/wiki/Negative_feedback *
* introductory paragraphs should be enough for students of IB Comp. Sci. HL

• Concise summary on feedback control systems (closed loop)

Manual and Automatic Control

• Great document on Control Systems from hkedcity.net; you should focus on its Chapter 3: Different types of control systems

Embedded Systems
Quite difficult to define, the best (and concise, too) article I've found so far is

• http://www.engineersgarage.com/articles/embedded-systems
• Plus https://en.m.wikipedia.org/wiki/Embedded_system if you want addional reading.

Software Licensing

Among the ethical issues related to computers, IT/computer science we can find:

• Privacy ([personal] data protection, collection, use and disposal)
• Security (access restrictions to data, especially relevant when stored/shared on networks)
• Licensing and copyrights

One that is easily neglected when we are in the academic context of an introduction to Computer Science is the third. Just in case it pops in your exams, here's what you need to know, in a nutshell:

• Privacy: if you're interested, you may want to have a read at the personal data protection act @ https://www.pdpc.gov.sg/legislation-and-guidelines/overview
• Security: we have definitely discussed in dept during class, especially under our networking topic.
• Licensing and copyright: http://searchcio.techtarget.com/definition/software-license
  Also these diagrams from https://en.m.wikipedia.org/wiki/Software_license are good for a quick overview on the topic: