Chain of Responsibility Design Pattern in Java

Chain of responsibility from Achini Perera

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Artificial Intelligence- another computing paradigm

The aim of artificial intelligence is, in some way try to make computers perform tasks that humans tend to be good at. It fills the gap between scientists who study about human behavior and computer scientists. A computer will always obey exactly for a given set of rules written in a programming language. So human scientists can test their theories about human behaviour by converting them into computer programs. For computer scientists, modeling human behaviour in a computer program is still a big challenge.

So Why AI?

Human beings have been outperformed by computers in many tasks. We can see this specially in these areas.

01. Numerical Computations

computers are obviously more faster and accurate than humans when it comes to numerical computations. ex: 123456 *837590497023
A normal pentiumII computer will give the answer to this multiplication function instantaneously while a math geek will still take few minutes to get it, possibly with errors.

02. Information storage

computers can store huge amount of information on its hard disk and some amount in their RAM as well. Upgrading or increasing the memory is just a matter of fixing another disk with larger capacity. Only limitation is availability of information. But when it comes to humans, we can keep only a certain amount of knowledge in our memory. Think !!! 80% of things you learnt at Level 1 Semester 1 might be already lost and gone somewhere right now. :)

03. Repetitive Operations

Normally humans get bored and tend to do mistakes as fatigue sets when they do the same thing again and again. On the other hand computers are specifically built to do such tasks.

The above list contains only the mechanical or mindless tasks which normally machines are good at. But "Intelligence" is not that. When performing intelligent tasks humans are far beyond the computers. So what is "intelligence"?

Intelligence is a loosely defined term, and there is no single exact definition a such. In order to possess intelligence, following have been identified as essential to have.

~ to respond to situations flexibly
~ To make sense of ambiguous or erroneous messages.
~ To assign relative importance to elements of a situation.
~ To find similarities even though the situations might be different.
~ To draw distinctions even though the situations look similar.

If intelligence could be defined as above, then following are some tasks that demand intelligence.

~ Speech recognition and understanding
~ Pattern recognition
~ Motion in dynamic obstacle filled space.
~ Mathematical theorem proving
~ Reasoning

I invite you to make an attempt to understand major AI concepts further more by exploring other web resources as well.Here, I did just an introduction only.

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Wireless Security

Wireless Security

More PowerPoint presentations from Kelley

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Check the JDK version in your computer

Do you want to see the JDK version installed in your computer. Then go to Start menu and type "cmd'.
Hit enter. You may be in this kind of a location. In my computer it is C:\Users\Achini>. But you need to be in   just C:

So type like this.
          cd..hit enter. Again type  cd.. hit enter. Do this until you reach the C: drive. Now you should be in C: drive.

     Then type "java -version".
                                                      (java,space,dash,version)

As you can see my JDK version is 1.6 and update 33. Check what is yours.

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Importance of Fiber (Proven remedies for constipation-1)

Constipation is a common as it can be seen among 2-30% in every population. No doubt it is a hard situation for many patients, specially when they are younger (eg: children) or elderly people. It is not a secret that this is one of the most hard functions of an elderly person's life he has to go through every day. That is why patients having heart disorders are advised to take their TNT bottle when going to toilet, in case to defense themselves from a sudden stroke. To avoid constipation easy steps you can take are,

1. drinking more water
2. Adding more vegetables and fruits in to your diet. (natural fiber is best than any other medicine) 

But unfortunately modern people with busy schedules cannot or forget to follow these steps regularly. There are medicines for such situations, which most of them should be taken with medical advice. Namely there are 4 kinds of laxatives.

• Bulk
• Osmotic
• stimulant
• lubricant

Bulk laxatives are things like Bran, ispagula husk, sterculia, Gam karaya etc. Provided examples include soluble and insoluble fiber. Commercial products are Fibogel, Laxinorm, Normacol and many more. Probably it takes around 12-72 hours for the onset action.

Normally commercially available soluble fiber products are little bit expensive. ex: Benefiber 

What is important with taking soluble fiber is, they can reduce the level of cholesterol in your blood. cholesterol is broken  into something called "Bile" at the digestive system. Bile can be eliminated with soluble fiber.


However bulk laxatives are not recommended for  children. But for elders, fibogel like laxatives can be prepared as a delicious drink and get rid of that unpleasant experience. We'll talk about other types of laxatives in another post.

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Suffering from "Missing .dll file" ?

          

   you may have experienced this popular error message at least several times if you have been using the computer for few years. In windows this error message pop ups as a run time error, most probably when you are going to launch a program. You can re install the program again or you can reinstall Windows. But you will see that error message pops up again. So what should we do ?

    Before that let me explain the reasons for this error msg. 

• Deleting a .dll file without knowing
• Over writing a dll file where the new one is incompatible or invalid.
• Malicious program (eg: Virus) may have deleted your dll file
• dll file may be corrupted or crashed by improper installation of a particular program.
• corrupted dll entries in the windows registry.

Even though it seems the best solution to handle this error instantly is downloading the individual dll file from some site I suggest you to reconsider the decision. Because there is a risk that the individual dll file providers are not providing the up to date, genuine and original dll file which will lead you to experience compatibility issues as well. You better be aware that computers pop up the first error message they encounter to the user as an error message when there are thousands of one  errors down the list. So most probably the biggest problem may be some thing else, though it pops up to download the missing dll file. So better to run a registry scan and identify what is the most essential error to be corrected. If you are a genius you can do it by yourself by skimming through the registry files. there are tools to identify and fix the registry errors. For an example 1-Click PC care.

 You can now download it from here. 

                                              

       

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Awsome HTML5 game making tool !!!

Recently I had a chance to explore on HTML5 , and there I found this pretty cool tool for HTML5 game development which allows to design and implement a game almost without any programming knowledge. This ground breaking tool is "CONSTRUCT 2" . You can create a 2D game with few mouse clicks and drag and drops. You can add realistic physics effects to the game objects you create with few mouse clicks. over 70 visual effects have been provided to make your game an exceptional one with Web GL shaders. They have provided a rich source of bundled assets as well such as music, ambient sound sound FX and sprite packs. The games you create can be published into any market place as an app, no matter if it's a web app or a mobile app.  The creator of this awesome tool is Scirra.com and you can now download it for free.
Here is a small video which demonstrates construct 2 . Enjoy game developing....



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