Java programming and OOP

Either to revise or as additional sources, the followins resources may help you with Java programming and OOP.

• This YouTube video playlist teaches Java programming with OOP as its main focus ("Early Objects" we could say).
• https://chortle.ccsu.edu/java5/Notes/chap92/ch92_2.html lexicographical order/Java compareTo method
• https://www.youtube.com/playlist?list=PLZPZq0r_RZOMhCAyywfnYLlrjiVOkdAI1 (up to 47 for the whole course; up to 25 for grade 11) ; https://www.youtube.com/watch?v=xk4_1vDrzzo
• https://www.youtube.com/watch?v=eIrMbAQSU34 great for our level and grade 11 IB CS
• https://www.youtube.com/watch?v=j9VNCI9Xo80 another great resource for our level and grade 11 IB CS; up to 02:17:14 - Exercise
• https://www.udemy.com/course/java-tutorial/
• https://www.sololearn.com/learn/courses/java-introduction
• https://www.freecodecamp.org/news/the-java-handbook/ (up to and excluding array lists for grade 11, all but excluding hash maps for grade 12)
• https://www.coursera.org/learn/object-oriented-java
• https://www.youtube.com/codingwithjohn
  

 Hope they will be useful to you!

Network and security

A very comprehensive glossary of network terms, obviously not all required for our examinations and syllabus, but they are extremely valuable.
Also, links to how stuff work's networking and security.

• Here is a great Networking Tutorial for beginners with pretty much all computer networking essentials covered.

Although you don't need to memorise the OSI reference model, awareness of the layered nature of networks is very important.

• http://www.computerhope.com/jargon/network.htm
• http://computer.howstuffworks.com/computer-networking-channel.htm
• http://computer.howstuffworks.com/security-channel.htm
• http://www.webopedia.com/quick_ref/OSI_Layers.asp
• http://searchnetworking.techtarget.com/definition/OSI 
• http://searchnetworking.techtarget.com/feature/Wireless-encryption-basics-Understanding-WEP-WPA-and-WPA2
• http://www.webopedia.com/DidYouKnow/Computer_Science/WEP_WPA_wireless_security.asp

And finally, a slideshow on error detection and correction:

Computer Networks - Error Detection & Error Correction from Saikrishna Tanguturu

Data Representation

The following is a list of links used in class to explain concepts related to data representation in computer science. Hope you find them useful, although they may lack the context we gave them in the classroom.

• http://www.ib-computing.net/program/core/representation.html
• http://www.ib-computing.net/program/topic_4/index.html
• http://webstyleguide.com/wsg2/graphics/displays.html
• https://en.wikipedia.org/wiki/Color_depth
• http://www.asciitable.com/
• http://unicode-table.com/
• http://www.scantips.com/basics1d.html
• https://en.wikibooks.org/wiki/Foundations_of_Computer_Science/Information_Representation
• http://www.wikihow.com/Convert-from-Decimal-to-Binary

Algorithms Videos 2015

2015 collection of links to videos of sorting (and searching) algorithms:

Bubble sort:

• https://youtu.be/UnK5ueUgc88
• https://youtu.be/y_Nuui4Qf-k
• https://youtu.be/P00xJgWzz2c

Insertion sort:

• https://youtu.be/Fr0SmtN0IJM
• https://youtu.be/UUswQbT6xQc
• https://youtu.be/c4BRHC7kTaQ

Selection sort:

• https://youtu.be/TW3_7cD9L1A
• https://youtu.be/Aq2E47uU2ao
• https://youtu.be/6nDMgr0-Yyo

Binary and linear search:

• https://youtu.be/wNVCJj642n4

OS process management

Found a really good summary about the different techniques used by processors to manage tasks/processes. For our syllabus, we are concerned about multi-tasking and time sharing, but if you're curious, other important and related concepts are also explained (i.e. multi-processing and multi-threading).

• http://www.8bitavenue.com/2012/10/difference-between-multiprogramming-multitasking-multithreading-and-multiprocessing/

VPNs

On the concept, advantages and disadvantages of VPNs:

• http://computer.howstuffworks.com/vpn.htm (excellent explanation, but no need to read beyond page 5)
• https://youtu.be/DhYeqgufYss (a good video explaining VPNs)
• https://youtu.be/IWcgvOPYPgw ("infomercial" about VPNs, nice animations, but more of a commercial than a source of information, beware)

IB Computer Science Topic 3: Networks - Types of networks

Bits and stuff

A set of interesting links on the impact and application of bit width/resolution:

• http://webstyleguide.com/wsg2/graphics/displays.html
• http://en.wikipedia.org/wiki/Color_depth
• http://electronics.howstuffworks.com/question487.htm Analog vs Digital Audio
• http://www.sevenforums.com/installation-setup/86886-32-bit-vs-64-bit-comparison.html
• http://en.wikipedia.org/wiki/64-bit_computing

IB Computer Science Topic 2: Computer Organisation - Binary representation

Power Supplies

Power Supply Units, or PSUs, are among the most important components of a computer.

It's not the most famous item, though, with processors, memory, motherboards, graphic cards and hard drives/solid state drives fighting for the spotlight...

Anyway, here are a couple of links that validate both my experience, observation, and yes -- blunders, too.
Titles should be self-explanatory.

• PC Power Consumption: How Many Watts Do We Need?
• The Big Power Supply Guide - Brands
• Gold and Bronze: Seasonic Power Supply Units Roundup
• Plus these couple of forum threads that show a good discussion on both PSU brands in general and specific models of PSUs.

Hope you find these links useful!

My Online Footprints

Not only technomess keeps me busy. Probably that is why you do not see a large amount of posts on this blog, which is more like a notebook to me.


Although they are more closely related to my work as a Computer Technology teacher, they may be useful, or interesting:

• An old blog managed and created by a former colleague ("magicpockets") and myself ("Delta"), now an archive of resources, ideas and notes from the time I had the privilege of working with him:  the HSTech blog.
• My current new blog to provide additional information and resources for my students, Curious Computer Tech.
• My tasty delicious bookmarks containing the treasures I have found online

And well, the rest is actually personal (facebook, twitter, flickr, and such) that I keep, well, personal and private.

OpenOffice.org

Downloading OpenOffice.org takes too long?

Try a server near you - the list is here.

For example, the two South Korean servers that mirror OpenOffice.org are

• http://ftp.kaist.ac.kr/openoffice/ and
• ftp://ftp.kr.freebsd.org/pub/openoffice/

Linux counter and more

Yes, I'm a Linux user. If you are, too, have your machine(s) counted at the Linux counter.

My favourite distro is Ubuntu (easy guess, probably), although I prefer KDE (still a fan of version 3.5) over Gnome. I like Gnome, Xfce, and LXDE, as well, Linux = choice and that's why I am so fond of it.

Other distros I like are Sidux, Mandriva (One), and openSuse and Fedora, in that order of preference.

Other sites you should know, related to Linux of course, are distrowatch and tuxradar.

New to Linux? Read this article on choosing the right distro for you.

New to Mac OS X

At work I've been exposed to Macs, so I've had to learn how to use them.

The purpose of this post isn't to review or criticise the platform or the OS, but to help you if you're new to Apple Macs and OS X, like I once was.

Hope you will find these links useful. I was trying to find Mac OS X version 10.4 "Tiger" resources, but there are links to Mac OS X 10.5 "Leopard" as well.

(videos)

• http://www.vtc.com/online-tutorials/Mac-OS-X-10.4-Tiger-tutorials.htm
• http://movies.atomiclearning.com/k12/osx_tiger_orientation
• http://www.youtube.com/watch?v=UGVHKl0CCCE
• http://www.apple.com/findouthow/mac/

(tutorials, text+images)

• http://www.apple.com/support/osfamily/ (support for Apple's Operating Systems & software - main link)
• http://www.apple.com/support/leopard/ (everything that Apple as for the 'Leopard' 10.5 system is here)
• http://www.apple.com/support/tiger/ (everything that Apple as for the 'Tiger' 10.4 system is here)
• http://www.inspectmygadget.com/2007/08/21/mac-os-x-taming-the-tiger-a-guide-for-beginners-part-1/
• http://www.apple.com/support/mac101/ (this tutorial shows the newest system 'Leopard', very similar to 'Tiger' - there will be minor differences, though)
• http://guides.macrumors.com/Mac_Beginner's_Guide (collection of links)
• http://support.apple.com/kb/HT2477 (some essential info. on the system)
• http://osxhelp.com/ (more tutorials)