Things to know about Touchscreens!!!

There are 3 technologies, which the engineers use for a touch screen, they are

1. Resistive

2. Capacitive

3. Infrared

	Resistive	Capacitive	Infrared
How it works?	A small dots separate multiple layers of material that are transmitting currents. When top flexible layer is pushed into the lower layer, the electrical current changes and the location of impact is calculated.	The current is broadcast from the corners of the screen. When a finger touches the screen, it changes the current, and that location in calculated.	1.Heat-Sensitive 2.Optical Heat-sensitive must be touched with the warm object to register point of contact. Optical uses sensors to shoot a grid of invisible beams just above the screens. Point of input is calculated based upon the point where x-y axis is interrupted.
Cost to make	Lower	Medium	Higher
Screen material	A layer of flexible material (Usually a polyester film), over a glass.	Glass	Glass
Tool for Input	1.Bare fingers 2.Gloved fingers 3.Stylus	Bare fingers.	Bare fingers.
Outdoor visibility(under sun)	Poor visibility	Good visibility	Good visibility, but strong ambient light impacts productivity and precision.
Multi-touch Capabilities?	No	Yes	Yes
Durability	Fair Durability. Screens are vulnerable to scratches and other minor damage. The screen will wear over time and need replacing.	Good Durability. Glass shatters upon major impact only.	Good Durability. Glass shatters upon major impact only.

So, I believe Capacitive Touch screens are the best one to opt, when you buy Touch Screen mobiles, tablets, Computer monitors, e.t.c,.

Core Java an Integrated Approach - The Best Java Book to refer

Hi Friends,
             Here is the Best Java book, which I found. Dr. Nageswara Rao is the author, he has used very simple english, which makes Indians/ College students to understand very quickly, also he has used very interesting real time examples to illustrate the Java Concepts.
             This book also has the Interview questions, Notes, Important points to remember, which makes a reader to read interactively. Since the book has very simple english, one can understand quickly. Hence, the book makes a crazy feel to learn Java.
              This book in the .pdf is no where available nor in the Internet. The only way to get this book, is to buy. It costs Rs.449 in sapna book house, but you can buy this in www.flipkart.com at Rs.337 (With free home delivery). And also you can read this Book on Google (But you can't Download) at http://books.google.com/books/about/Core_Java_An_Integrated_Approach.html?id=gwxBt1wHsasC

         
              2nd Best Java book according to me is the Head First Java, this book is freely available in .pdf, so you can download, you will get it when you google it (Else email me at fairoz414@hotmail.com, I will send you across). I will cost you around Rs.500, if you opt to buy.

              Any other Best Java book you know? Please share it across, which will be helpful to everyone.
           
Thanks,
Mohammed Fairoz

Worlds Cheapest tablet - Aakash Tablet

Hi Friends,
Here we have a world's cheapest tablet computer which costs only Rs. 1500 to Rs. 2500, Aakash Tablet. Aakash is made in India, which runs on Android 2.2, and also has USB ports where Apple or Samsung tabs won't.
One can see you tube videos and listen GSAT lectures using Aakash. Configuration of the tablet is as follows:
Connect via GPRS or WiFi
Web, Email, Facebook, Twitter and much much more!
HD Quality Video
7” screen
Applications Galore with Android 2.2
Full sized-USB port & Micro-SD slot
Expand memory to 32GB
And also has a sim slot(Can be used as a phone!!)


Dislikes:
Poor touch sensisitive
No Camera
Doesn't supports 3G 


Pics:

For further Details: http://www.akashtablet.com