Sudoku cheat

Hi, long time no blog! I just realize that I already had an awesome model to cheat the sudoku game. Last month, I bought the puzzle book to prove that my model wasn't wrong (actually, i'm think about won the price by cheating, lol). My project was about sudoku solving model from optimization method subject, I have to model and doing research about sudoku, what is the model, what's the different between using IP and CP, how was bigger problems, how was another rule of sudoku... etc. Actually my grade was not good, I got B+ with 79 points (- -") but i would say that the project introduce me how to model with IBM iLOG, knowing about sudoku in deep and it was fun to work with the game i like. ;) But my document still needs to improve.

Sudoku is a number placement puzzle based on logic rather than mathematics. Sudoku gained worldwide popularity in early 2005 and began selling in the form of puzzle books, handheld electronic versions and board games, as well as appearing in thousands of daily newspapers.

The concept of Sudoku is simple. The puzzle consists of a 9x9 square grid that is divided into nine 3x3 squares, resulting in nine rows and nine columns, for a total of 81 small squares. The unsolved Sudoku puzzle supplies only a few numbers in random squares.

To solve the puzzle, the remaining squares must be filled in with the numbers 1 through 9, each appearing only once in each row, column and 3x3 square.

There are more informations, model for both IP and CP and some another rules of sudoku, you can find out from my document

My project document: https://docs.google.com/open?id=0B-Ls4RhAgiHeQjBtdFFram1wRUk

My project presentation: https://docs.google.com/open?id=0B-Ls4RhAgiHeRFFvQWswZXRlYlU

Actually, I already record my video when i was using my model to solve the puzzle from the book but I'm too lazy to edit the video. But it works for all puzzle from the book! (of course!) I'll show you later if I have time to edit it.

Software Engineering

I'll have the SE final exam this Friday. I have new method to walkthrough all the topic that i have learn from school, which is mind map! I always use mind map to implement my work, why I don't thinking about to use with studying. It was really save time, I can get all concept of the lecture (at least I'll know the entire topic :P - Hey! it's take time to improve, okay!) Then, today I made another mind map for Software Engineering subject, after finish ..... it didn't make me feel any happy! Why we have so much lecture just only 1 semester! Here is just an outline, not yet the detail! Fortunately, it's open book and open machine test. Wish me good luck!

Longest Common Subsequence (LCS)

This is the presentation for Efficient algorithm about Longest common subsequence.

What is LCS?
The longest common subsequence (LCS) problem is to find the longest subsequence common to all sequences in a set of sequences (often just two).

The application of LCS is for finding the common in text string meaning that sometime it used for checking that the code from 2 source are the same or not (so crew for copy, right?) or finding the common in DNA if you want to find if someone is your relative or not (LOL).

How to do this?
Follow my slide is okay (haha): https://docs.google.com/leaf?id=0B-Ls4RhAgiHeMThmYTYxOWQtZTdkZi00NDNjLWI0NDUtZTllMDY0Y2RhMTM3&hl=en_US
For the flash slide to see step by step: Click the arrow at the bottom to see the step
View on ShareSWF you can download from this link: https://docs.google.com/leaf?id=0B-Ls4RhAgiHeMmY5MDZmZjItYTRlOS00ZDI5LTk1ZWEtNTU2NTEyZmNkOWMx&hl=en_US


good luck (my way)
Patama

Dropbox

Today i'm gonna talk about my distributed technology study and my topic is Dropbox!

First I want to tell you that what will be present today, I'll introduce you to the what is dropbox, concept of Dropbox, How dropbox work and some sample of dropbox if we have time. You may have this kind of problem, like me today, i have to present but I have problem with computer and forgot my USB drive! then you may realize that you need a service that can provide you the resource and you can access anytime with any machine. Umm, kind of interested, isn't it? And that's why Drew Houston founded Dropbox in 2007 and officially launched at 2008 and become more popular in rapid period.

Well! you might want to know what is dropbox, right?

Dropbox is a web-based file hosting service. it uses cloud computing to enable user to store, like here if your computer have a problem like it's on fire or broken. it's no problem if you drop your file on dropbox. And you an share file and folder across the internet using file synchronization. Another feature is keep track, back up of your file, no matter you accident edit your file, you can see the log file here. (เปิดหน้าของ dropbox ให้ดู) And the cool things that i love are multiple OS, big storage (you know for free user, it's start from 2 GB! and you can add 250 MB if you invite other to join Dropbox) and because it can use by multiple format, that mean you can sharing or access the resource anytime, everywhere or whatever if it connected to internet.

Here i'll show you that dropbox can use for any format; window, ubuntu, mac, this is on my smart phone and here is via Dropbox webpage if you didn't install the application.

As I said, Dropbox uses cloud computing to enable user to store and share. Then I wanna tell you the overall image of cloud? I can't tell you more detail about cloud computing, in fact Thee will present us about cloud computer next week. what does it mean?

You know? The concept of cloud computing fills a perpetual need of IT: a way to increase capacity or add capabilities on the fly without investing in new infrastructure, training new personnel, or licensing new software. Cloud computing encompasses any subscription-based or pay-per-use service that, in real time over the Internet, extends IT's existing.

Advantage:scalable, paid only when needed and can be used by any device with a connection to the net directly or by using client programs. actually it can use offline, but the resource is from your computer, in fact, it's on your computer. i'll tell you later how it's work!

Other application: In face, there are another service apart of Dropbox such as Ubuntu one, Box.net, Zumodrive and so on. you know some service and provide more space but I present you the Dropbox because it's the popular one and it seems to be the most stable service now.

How does it work?

- First when you install dropbox application on your computer, one directory on your computer is designated as the drobpox.

- Files placed in the Dropbox are automatically synchronize to cloud. Changes propagate to other machine in your Dropbox network from the cloud.

- Once files are completely synchronized, a green checkbox appears on the bottom of the file or directory icon.

We know that Drop box is a service to share and to share need the client to synchronize. I would say it's intelligent synchronization.

- when files change, only the binary diff is transferred.

- Files are compressed as they travel over the internet.

- If two people modify the same file on separate machines, the first submitter wins. and the second submitter's file is also synchronized.

Where are the files stored?

- If you have installed the Dropbox desktop application, your files are stored both on your computer (in your Dropbox folder) and on Dropbox's secure online servers.

- All files stored online by Dropbox are encrypted and kept securely on Amazon's Simple Storage Service (S3) in multiple data Centers located across the United States.

What is Amazon Simple Storage Service? (Amazon S3)

Amazon S3 is storage for the Internet. It is designed to make web-scale computing easier for developers.

Amazon S3 provides a simple web services interface that can be used to store and retrieve any amount of data, at any time, from anywhere on the web. It gives any developer access to the same highly scalable, reliable, secure, fast, inexpensive infrastructure that Amazon uses to run its own global network of web sites. The service aims to maximize benefits of scale and to pass those benefits on to developers.

Dropbox can be used profitably for distributed evolutionary algorithms, without the need to acquire or set up complicated cloud or grid infrastructure; besides,

Using tools available in every classroom,lab, office or home and freely available over the internet with a good scaling behavior can be set up to perform heavy-duty evolutionary computation experiment.


Here is my presentation for the class: https://docs.google.com/leaf?id=0B-Ls4RhAgiHeOWU4NTI2YzQtMzgyNS00MTRhLWIyZDItNGQ0YTA5OGRlMjcy&hl=en_US

nearly

Dear all,
It's almost 3 month that i started master's degree in field of Software System Engineering. The studying is not going quite well for me. I have too much work from both workplace and university. Actually, work from workplace was not that much but Master's degree need more concentrate and hard work than i expected. I would say I didn't do well in this semester, I don't understand the lecture, i would blame it on me, the subject was not so interested for me. I don't like the subjects like distribute system or network stuff which I couldn't imagine what the result should be. It's like something in the cloud that i couldn't touch.

Good luck for all,
Patama