Compter Graphics

What is a Computer Graphics  ?

      Computer Graphics are usually image data that is created using a specialized graphical hardware and software. This phrase was brought into existence the Graphics researcher Verne Hudson and William Fetter. The important topic that are a part of Computer Graphics are User Interface design, vector Graphics, Graphics processing Unit ( also known as Visual Processing Unit), 3D Modeling.
The term Computer Graphics can refer to several things:-

• The manipulation of data in the form of Image using Computers.
• The technology used to manipulate the image.
• The sub-field of Computer Science that studies different methods of Synthesizing and Manipulating Visual Data

Concepts and Principles included in Computer Graphics

•  Pixels :- Pixel is a single point in an image. It is a two dimensional grid and is represented using symbols like dots and squares.
• Graphics:- Graphics are visual presentations combining text and illustrations.
• Primitives :- Primitives are basic units that a graphic system may combine to create complex images and models such as Character maps in 2D Video Games.
• Rendering :- Rendering is the creation of a 2D Image from a 3D model using computer programs. The Rendering Program is a lighting model for computer generated Imagery
• 3D Projection:- 3D Projection is the method of mapping three dimensional points on a plane that is two dimensional. The use of 3D projection is wide spread in field such as Computer Graphics and Engineering. 
• 3D Modeling:- 3D Modeling is the process of developing a mathematical representation of a  three dimensional object. It can be manual or automatic. 

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References 

• https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0ahUKEwjA9bCA98zQAhUp74MKHWsvCLEQjRwIBw&url=%2Furl%3Fsa%3Di%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dimages%26cd%3D%26ved%3D0ahUKEwjA9bCA98zQAhUp74MKHWsvCLEQjRwIBw%26url%3Dhttp%253A%252F%252Fwallpapers.ae%252Fcomputer-graphics-wallpaper.html%26bvm%3Dbv.139782543%2Cd.cGw%26psig%3DAFQjCNEy2BOkAZk6Iu3d_NGGbkcKAadxRA%26ust%3D1480473237218836&bvm=bv.139782543,d.cGw&psig=AFQjCNEy2BOkAZk6Iu3d_NGGbkcKAadxRA&ust=1480473237218836
• https://en.wikipedia.org/wiki/Computer_graphics

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            Wildcard in Programming 

What is Wildcard?

Wildcard is a symbol used to replace or represent one or two characters. There are different types of symbols used for the wildcard. Many application and Operating Systems support wildcard to search for file and directories. It helps the user to search for files with using short forms while searching for a file name. The advantage of the functions of Wildcard is that if the person doesn't remember the full name but vaguely remembers a few letters they can see all the options available with that file name and  recognize  the name rather which is easier than having to remember the full name.

What are the different symbols used as Wildcard Character?

         There are different characters used as a Wildcard:-

• PercentWildcard  (%) -: The percent wildcard is used to matches characters zero or more times in the Structured Query Language (SQL). It includes the underscore symbol as well.
• AsteriskWildcard(*) -:  The Asterisk is used to match characters zero or more times. For example , for (comp*)  all the terms starting 'comp' such as computer, complete, will be included in this.
• Question MarkWildcard (?):- The question Mark is used to match a single character. For example for ("c*mp")  the perfect matches would include words like camp and comp. In MS-DOS and  the Windows the question mark symbol(?) matches the trailing question marks zero or one times. For example, ("si??") would also show the result sip even though it doesn't have four character. This is because it matches the trailing question mark.
• Open and close Bracket Wildcard ([]) :-  The open and close brackets match single characters in the range . For example, the letter f would be matched by this Wildcard but the number 8 would not be matches by this Wildcard because it is not a part of this range.

 What are the programming languages that support the usage    of Wildcard?

  Wildcard can be used in Javascript and C++  and Structured Query Language (SQL).
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Reference

• http://www.webopedia.com/TERM/W/wildcard_character.html
• http://www.computerhope.com/jargon/w/wildcard.htm
• http://www.rlvision.com/blog/using-wildcard-matching-in-any-programming-language/
• https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0ahUKEwjtvY7UxrPQAhWQ3oMKHYZLD8kQjRwIBw&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FWildcard_certificate&bvm=bv.139250283,d.cGw&psig=AFQjCNGxhdnqCiwY_sYNiEs5xq-f6jjmpQ&ust=1479601335672746(Image)

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                          Use of Computer in Banking

The computers have taken over most of the world. As predicted by Economists, all the Routine  manual and Routine Cognitive  are being removed. The main reason for this to happen is the development of technology which in turn is also making dependent on Technology. Just like the fields in the world, computer Science is the also a very essential part of Banking.

  What is role of computer in Banking?

The role that computer science plays in Banking are 
- It makes sure that no money is being misplaced or lost in transaction.
- It has  a fixed place where all the data and information about the transactions and the people involved in the transactions  is storage.
- the computer helps to store more information than an entire library of books and files would have been able to store.
-With the improvement in computer a whole new kind of Banking has opened up that is completely web based. It helps you to conduct all your economic transactions sitting on the computer.
- It has made the informations  about the bank for all the people more accessible.
- It has  made it easier for the banks be in touch with the other branches of the bank.

Computers are essential for the Smooth function of the  banking because computers are found at every stage of Banking. The smooth functioning of Banking depends on the smooth function of the ATM,  the bank computer that authorizes money withdrawal, Direct Deposit depends on computerized transactions, use of the Scanner which makes transactions so much more secured, and many more just technological tools to make it easier for the Bankers
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Reference 

• https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0ahUKEwi9ivbpoaLQAhUY-GMKHc16CGsQjRwIBw&url=%2Furl%3Fsa%3Di%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dimages%26cd%3D%26ved%3D0ahUKEwi9ivbpoaLQAhUY-GMKHc16CGsQjRwIBw%26url%3Dhttps%253A%252F%252Fwww.dreamstime.com%252Fstock-photo-businessman-using-online-banking-service-close-up-computer-office-image54644455%26psig%3DAFQjCNE7p8LZV1dgGNMoAH5SIFpgNISHnQ%26ust%3D1479007329240515&psig=AFQjCNE7p8LZV1dgGNMoAH5SIFpgNISHnQ&ust=1479007329240515
• https://www.reference.com/business-finance/banks-use-computers-f85f062dfbff1183
• http://www.ehow.com/about_5476081_use-computers-banks.html

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                                   Computer Virus

 A computer virus is a piece of code that enters the system that damages the regular working of the computer. The computer viruses are all man made and they make the computer run against your wish.  The computer viruses can takes over a great space in the hard disk.The main causes for Computer viruses are:

 -Infected Flash Drives or Disks

- email attachments 

-unknown infected websites

 -use of pirated software

What are the different types of Viruses?

 The different types of viruses are
-CodeRed:-This is a worm that infected the function of the Microsoft IIS Server. This is the Virus                          that posed an attack on the White House's Website.

-Nimba:- It is the kind of Virus that spreads itself using different methods. It can make changes to                    pre-existing file, change the security system and degrades the performance of the computer

-Sircam:- This kind of virus is spread via email. It degrades the performance and also delete's the                       files. This kind of Virus can be sent to anyone.  

- Melisa:- This is a virus that send itself to 50 people if  Microsoft Outlook is installed on the                         device. It disables different safeguarding setting in MS Word.

- Ripper:- It corrupts the data from the hard disk

- MDMA:- It transfers between the two MS Word file  in the memory.

- Concept:- This kind of virus  is also spread around via email attachments. They save the file in                             template directories instead of storing them in their Original Locations.

 How can we protect our computers from Anti-viruses?

 The computer can be protected from Anti-Viruses by the following  precaution 
- The latest version of Anti- virus software should be installed in our computers.
-The anti-virus should be updated regularly.
-USB drive should be scanned for viruses and shouldn't be used on infected computers.
- Unauthorized or pirated software shouldn't be installed on the computer.

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References

• https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0ahUKEwjMr6jplZDQAhWBLSYKHXZgAvcQjRwIBw&url=http%3A%2F%2Fhome.bt.com%2Ftech-gadgets%2Fcomputing%2Fwhat-is-a-computer-virus-11363921495036&psig=AFQjCNEGhtr4428u9c7Td4GDVM00aojeLQ&ust=1478385437577697

• http://www.byte-notes.com/what-computer-virus#simple-table-of-contents-3

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