Android Evolution - The Interesting Facts You Should Know

Android is a kind of operating system that based on Linux operating system which is designed for the touchscreen mobiles, tablet computers and Smartphone. This is found in 2007 by the Android Inc. Android is now one of the most popular operating system and millions of people use Android Smartphone. There are lots of users of android version in Bangladesh too. As a result the authority has developed many android applications in Bangla language!

There is all the version released from the beginning :
Android 1.0 - Alpha
Android 1.1 - Beta
Android 1.5 - CupCake
Android 1.6 - Donut
Android 2.0 - Eclair (2.0–2.1)
Android 2.2 - Froyo (2.2–2.2.3)

Simpson's 1/3 Rule

Simpson’s 1/3 rule is based on approximating the integrand by a second order polynomial .It is an extension of Trapezoidal rule where, the trapezoidal rule was based on approximating the integrand by a first order polynomial, and then integrating the polynomial over interval of integration.

It calculates the value of the area under any curve over a given interval by dividing the area into equal parts. It follows the method similar to integration by parts.  It is used to estimate the value of a definite integral.

In order to integrate any function f(x) in the interval (a,b), follow the steps given below:
Ø  Select a value for n, which is the number of parts the interval is divided into. Let the value of n be an even number.
Ø  Calculate the width, h = (b−a) / n.
Ø  Calculate the values of x0 to xn as x0 = a, x1 = x0+ h, x n-1 = xn-2 + h, xn = b.
Ø  Consider y = f(x). Now find the values of y (y0 to yn) for the corresponding x(x0 to xn) values.
Ø  Substitute all the above found values in the Simpson's Rule Formula to calculate the integral value.

This calculator project using java:

 simple calculator
The code is given bellow:

The Runge-Kutta Method was developed by two German men Carl Runge (1856-1927), and Martin Kutta (1867- 1944) in 1901.

50 very useful shortcut for Windows Run Option

When do we actually use Windows RUN(Win+R) option?
-Just simply type "tree" and we refresh our computer shortly.That's it.
But I collected some extra very important shortcut which really help you to save your time. So, Let's fun!  :)
For calculator you have to simply type
"calc" in RUN option & calculator will appear immediately.
Very useful shortcut given below. Collect these and use in time.

Bluetooth Transfer Wizard – fsquirt
Calculator – calc

21 Awesome Keyboard Shortcuts for Facebook!!

Time is very important for us. Because of saving time, we use shortcut in many application  or
program. We have windows shortcut , Mac shortcut, Linux shortcut. All kind's of software also have some shortcut keys so that user can do there task quickly and easily. Facebook, one of the most popular social network. Almost everyone who use internet, use facebook. Here is some shortcut for facebook:

We may see different compilers for one programming language. Among them there are few efficient and best compilers that we can use without any problem.

A compiler is a computer program that transforms source codewritten in a programming language into another computer language which have binary code (0, 1) (means machine language). We will know about one of the efficient compilers for programming language C, Java, HTML, Python.

C Compiler:

Level of programming languages

programming languages are developing day by day and they are categorized in 5 generation until now

 Level of programming languages
In all over the world, language is the source of communication among human beings. Different countries have different languages. The machine (computer) doesn't understand our common
language. To interact with computer we should send instructions in a way the computer is supposed to understand. We use some specific language to communicate and write program in computer.

Follow the steps shown in video:

Caution:

* This process will delete your all existing files.
* May not applicable for all kind's of handset.
* You also can know details about your phone, like as buttery status, bar-code , mac etc.
* Please subscribe and share if you like this video.

Some important sort-cut for Eclipse :

1. Manage Files and Projects

 Ctrl+N Create new project using the Wizard Ctrl+Alt+n Create new project, file, class, etc. Alt+f, then . Open project, file, etc. Ctrl+Shift+r Open Ressource (file, folder or project) Alt+Enter Show and access file properties Ctrl+s Save current file Ctrl+Shift+s Save all files Ctrl+w Close current file

How to get a Payoneer Prepaid Debit MasterCard ?

What is Payoneer MasterCard ?

Payoneer MasterCard is a Global solutions for professionals and small businesses to receive funds, with local options to spend and withdraw.

• Receive funds from thousands of companies worldwide
• Spend online, in-store and withdraw at ATMs with the Payoneer Prepaid MasterCard® Card
• Withdraw funds to your local bank account, in your local currency.

Simple Book store project using array, string and method in java.

Array, string and method exercise:

 Book store project using array
Suppose you are a Book seller. You have 3 items of book's like java, C and Python. You give Discount to your customer as .2% for teacher  .3% for student .5% for wholesale.
Your program will ask your customer which book he needs. Then program will ask who is he or she, teacher, student or wholesaler.

Where is the Marble?

Raju and Meena love to play with Marbles. They have got a lot of marbles with numbers written on them. At the beginning, Raju would place the marbles one after another in ascending order of the
numbers written on them. Then Meena would ask Raju to find the first marble with a certain number. She would count 1...2...3. Raju gets one point for correct answer, and Meena gets the point if Raju fails. After some fixed number of trials the game ends and the player with maximum points wins. Today it's your chance to play as Raju. Being the smart kid, you'd be taking the favor of a computer. But don't underestimate Meena, she had written a program

What to do ?

Some times we see our friends PC Facebook homepage like this :

. So let's know how to show the hidden password.
Just move the mouse pointer in the password box and then click on right button. You will have option bar like following. Just click on "Inspect Element ( Q )" button.

Sometimes, our solar panel can't gate enough light to recharge battery. It may for trees , also can happened for weather. In rainy season and also in winter , sunlight can't reach to panel enough. So we can help solar panel to produce electricity and get rid of from load-shedding.

 Panel

How do solar panels work?

A solar panel is made up of many small solar cells. Each solar cell uses light to make electricity.
We see electricity at work every day. When a person turns on a lamp, electrons move through the cord and light up the bulb. That flow of electrons is electricity.

Just easy 4 steps:

Step 1 :

Go to the video location from which page you want to download
video.

In computer science, a linked list is a data structure consisting of a group of nodes which together represent a sequence.
Example:

Input and output in file :

For taking input and produce output from a file, at first we need to create 2 text file which mean the file extension must be .txt . The file have to create in the location in which we will save our java
source code.

Topological sort:

In computer science, a topological sort or topological ordering of a directed graph is a linear ordering of its vertices such that for every directed edge uv from vertex u to vertex v, u comes before v in the ordering.
For example, in following  Directed graph , the first black vertex or in which vertex DFS find finish time should place in the last of the output. Here , DFS start traverse from Shirt, but first finished time is jacket .  So it goes to the last position of stack or link list.

 Topological sort

Bubble sort algorithm implementation in java:

Bubble sort, sometimes referred to as sinking sort, is a simple sorting algorithm that works by repeatedly stepping through the list to be sorted, comparing each pair of adjacent items and swapping them if they are in the wrong order. The pass through the list is repeated until no swaps are needed,
which indicates that the list is sorted.

Binary search:

Binary search is searching algorithm which can search first-er then Sequential search. It's executes in O(log N) time.
A binary search can
only be performed if the list is in sorted order.

Binary search:

Binary search is searching algorithm which can search first-er then Sequential search. It's executes in O(log N) time.
A binary search can
only be performed if the list is in sorted order.

Here is Java code of  Binary search :

Breadth First Search ( BFS ) in java

Breadth First Search ( BFS ) is a searching algorithm which search the destination from root or source and explore all the neighbor nodes first, before moving to the next level neighbors. The animation will make this more clear.

The following code is to implement Breadth First Search ( BFS ) in java

Depth-First Search

Depth First Search ( DFS ) is a searching algorithm which start searching the destination from the root to the last depth of the each branch first, then go to the next branch to search the destination.
The animation will make the concept more clear.

To learn DFS, you can download a complete power point  slide on DFS.

CSS Bangla book

For learning CSS in Bangla language , collect this book from here.

Background

Problems in Computer Science are often classified as belonging to a certain class of problems (e.g., NP, Unsolvable, Recursive). In this problem you will be analyzing a property of an algorithm whose classification is not known for all possible inputs.

Poster presentation:

Presenting something by a poster is called Poster presentation. Poster may vary due to the presentation topic. But most of the poster looks like this:

The poster contain some points

Bangla HTML Book:

For Bangla HTML learning, one of the best book is here. You can collect this book in Pdf format from here.

Computer Programming Book by Tamim Shahriar Subeen pdf

If you want to learn Programming with C, you can download this book in Bangla language. This book will help you to learn the basic of C language in a proper way.This book is for anyone who love programming.

Programming in ANSI C by Balagurusamy:

For learning C program at a higher level, ANSI C by Balagurusamy book is wonderful.

 Programming in ANSI C by Balagurusamy
Happy Coding !!

For more Computer Science pdf Book Go To all Book section.

News: International Robot Olympiad 2018 Gold winning Project (Video)

Many of us use bit torrent or U torrent software tools to download from different torrent sever.
For that we have to install extra software in our computer and takes a lot of time to download from the sever.
To solve this problem there is a online sever which will download your desire data into it's own sever and from there you can directly download files at full speed.

Step 2:

Java The Complete Reference, 8th Edition By Herbert Schildt.

Java The complete Reference, is a Java complete guide for beginners with simple and easy language, examples. I think anyone can learn java easily by following this book.