Basic Computer Tutorial

This basic computer tutorial is written for those who do not know very much about computers. The purpose of this basic computer tutorial is to help the reader better understand how to use their computer more effectively and safely. It will help the reader understand: What files and file types are. How to copy files. Where your files are stored. What the parts of your computer are. What an operating system is. What a computer program is. Security and Performance With the above basic information, this tutorial will explain methods that you can do to make your system more secure, keep your data safe by backing it up, and avoid most performance degredation caused to bad applications and SPAM. How some file types can be used by third parties to gain control of your computer. How to modify your file view settings so you are not as easily fooled by e-mails containing viruses. How to prevent viruses and worms. How to reduce SPAM. How to back up your files. How to reduce or eliminate unwanted programs that could reduce your system performance. What to do if you receive a virus or worm. What to do if you receive an e-mail telling you that an e-mail you sent contained a virus.

This basic computer tutorial gives some basic information about hardware, operating systems, and programs in the first half to help the reader understand later information about files, e-mail and computer security practices. Depending on the reader's level of knowledge, some of the basic information may be skipped and the reader may refer to the terms page if they do not understand some of the terms

The basic of PHP programming

  the discussion this time we will begin to struggle with the PHP programming language, here we will be a lot to learn the basics of PHP programming language that will will be implemented for web applications in the subsequent discussion.

PHP tag  In general, the PHP interpreter will be looking for a PHP tag in one file (web page) Where to find the tag when  PHP (opener), the PHP interpreter began to translatePHP prefix of the tag to find PHP tags (cover). PHP language tag flanking the embeded in a file, PHP script in this tag is translatedby the PHP interpreter. PHP tags are divided into two, namely:
* Tag Viewer: It is a tag where the PHP interpreter will start the translation code. Opening tag can be written in the form

-        <? PhpOr-        <script Language="php">
* Closing Tag: This is a tag where the PHP interpreter terminate translation within a block of code in PHP tags. Closing tag is a pair of tagsOpening, so the closing tag should be adjusted with the opening PHP tag. Form in the PHP closing tag is as follows:

?>or</ Script>
thus writing the correct tag is as follows:<Php ............. ?>     and <script language="php"> .................. </ Script>
although the use of opening and closing tags are allowed beratura tag (not suitable mate), but for continuity and consistency of the author suggest the readers to always use the appropriate tagwith each partner so that the code more readable and understandable.The following are examples of application of writing PHP tags with PHP code didalamnnya.<? php      echo ("tag in PHP");?>
or
<script language="php">echo ("like this also allowed"); </ script>
or
 <script language="php"> echo ("this one can also");<? Php
or
 <? php
echo ("this is fine");</ Script>
The four styles of writing the above code the same - the same is allowed, but the remedy then we only use the tags in accordance with their respective spouses.Let us remember that in a file we can write more than one pair of tags, because PHP is a code or script that can be embedded (embed) in an HTML.
hopefully this article useful to add information and science reader.

Advantages And Disadvantages MySQL

indeed there are many applications in addition to the MySQL database management, but why in this book was chosen MySQL as the database management application as a supplement in learning web programming with PHP processing implemented on the database.some of the exact reasons are the following :1. Portability. MySQL can run stable on a variety of operating systems Windows, Linux, FreeBSD, Mac Os X Server, Solaris, Amiga, and many more.
2. Software is open source. MySQL is distributed as open source software, licensed under the GPL so it can be used free of charge
3. Supports Multi-user. MySQL can be used by multiple users at the same time without experiencing any problems or conflicts.
4. Performance Tuning: MySQL has an amazing speed in dealing with simple queries, in other words be able to process more SQL per unit time
5. Various types of data. MySQL has a variety of data types that are very rich, such as signed / unsigned integer, float, double, char, text, date, timestamp, and others.
6. Commands and Functions MySQL:MySQL has full operators and functions that support the SELECT command in the command where the funds(Query)
7. Is safe. MySQL has several layers of security such as the level subnetmask, host name, and access permissions a user with a detailed system permissions and passwords encrypted
8. Scalability and restrictions.MySQL database capable of handling large scale, with a number of records more than 50 million 60 thousand tables as well as 5 billion baris.selain it limits the index that can fit up to 32 indexes on each table.
9. connectivity. MySQL DAPT to connect with clients using TCP / IP, Unix socket (unix), or Named Pipes (NT).
10. Localization. MySQL can detect the error message on the client by using more than twenty languages. however, the Indonesian language has not been included therein.
11. Interface. MySQL has an interface to a variety of applications and programming languages ​​by using the function API (Application Programming Interface).
12. Tool. MySQL comes with a variety of equipment (tools) that can be used for database administration, and any existing equipment pa online manual included.
13. Table structure. MySQL has a table structure that is more flexible in handling change, compared to other databases like PostgreSQL or Oracle.
14. Free of charge. is perfect for anyone who wants to learn as well as for the expert level because complex software with a myriad of advantages of this is free.
So much of the information before me, may be useful.

What is Mysql??

MySQL previous term may sound a bit strange, especially if you are the first time to know him, but for a databasi administrator, MySQL is one of the daily diet. Here we will learn more about MySQL problems.

understanding MySQL
   MySQL is one of the software database management system (database) or oftenreferred to as SQL DBMS (Database Management System) is different from conventionaldatabases such as *. dat, *. dbf, *. mdb, mysql bag 2 has the advantages of naturemultithreaded, and multi-user and network support systems, MySQL is freely distributableunder the GNU General Public license (GPL), namunada also a commercial version forcertain circles who want it. What is a Database? before we discuss more about MySQL, it helps us learn things about the database. Database or database is a collection of information or data in a systematic way so that it can be checked by a computer programto obtain information from the database.

   in a database typically consists of tables in a table where there is structural information that can be read systematically. The tables in a database are usually interrelated and have a relationship with one another.

Table, Field, Record
   when struggling with the database then inevitably we will use the term a lot of the Table,Field, Record. so let us understand at a glance notions isitlah problems mentioned above.
The table is a set of Record and Field form one entity.

Record is a row of a table.
A field is a column of a table.
If plotted on a diagram the relationship between the Database, Table, Field and Recordare as follows:




in the figure above shows that a database can consist of a set of records (rows) and fields(columns).

So much may be used to post about MySQL this time it may be useful.

Understanding, a brief history, and development of the PHP Programming Language

before we enter further discussion about php, it helps us know the definition and brief history of php. more established measures that we learn the PHP programming language.
understanding About PHP:PHP or Hypertext Preprocessor is an abbreviation of one of the programming language suitable open sorce or devoted to web developers dandapat cultivate in a script in HTML.programming languages ​​like C, Java, and Perl as well as easy to learn.
PHP was created to facilitate web developers to write dynamic web pages quickly, even more than that we can explore things that are amazing with PHP, PHP thus very suitable for beginners, intermediate and even expert though.
A Brief History
  beginning PHP is short for "personal home page" which was made in 1995 by Rasmus ledorf. that time his name is still interpreted form. PHP maker in the next release source code to the public (open source) so that programmers interested in developing PHP.
finally in November 1997 in Release PHP 2.0 on this version of the PHP interpreter is implemented in C, and has included additional modules or in PHP is often referred to as ekstensi.pada 1997 also contributed to a company called Zend, which the PHP interpreter to be rewritten be clean, fast, and better. and finally in mid-1998, released Zend PHP 3.0 with the replacement of an abbreviation of the personal home page into hypertext preprocessor.

  on the subsequent development of the Zend continues to play an important role in the development of PHP, in mid-1999, PHP 4.0 was released on this version and more people began flocking to use PHP for its ability to build complex web applications, but still has the speed and stability.
along with the times, many programming languages ​​began to implement a model of OOP (Object Oriented Programming), did not want to miss the PHP version 5.0
released in mid-2004 with new capabilities that object-oriented programming.

Definition of programming languages (Computer)

for lovers of computer programming languages ​​may be familiar in your ears, even maybe you've been using it to develop an application. but for a beginner programming language may sound a little strange ears. in general every programming language has several important components, namely:
code editor: facilitate  function to write the source code in programming languages ​​used.
interpreter: function to translate the source code of the line per line.compiler: function to do the compilation, the translation of the entire code in a program into the application of PE (can be directly loaded in memory)
but not all programming languages ​​have the same components and the environment, so there is some kind of division again. based on the presence or absence of a programming language compiler again divided into 2 types

a.  division based on the compiler   based on the presence or absence of compilers, programming languages ​​are grouped into two types, namely:
1. non-compiled (web):he compiler
type of programming language does not require a compiler, where most of the programming language is working on a web environment. programming language source code of non-compiled translated by the interpreter of each language, thus can be said to be non-compiled programming languages ​​work slower than compiled languages ​​because source code is not shaped machine code that can be executed in memory is indirectly.
examples of the programming language of this group is a web-based programming language like (PHP, Perl, HTML, ASP, JAVASCRIPT, etc.)
2. compiled (desktop)This type of programming language requires the compiler to create desktop-based applications. usual programming languages ​​of this type of work faster than the previous type (non-compiled) because the source code has been turned into machine code that can be executed directly in memory by the PE Loader. programming example of this type are (assembly, C, C + +, BASIC, Visual Basic, Pascal, etc.)
okay enough of the discussion about what the classification of computer programming languages,i hope this information is useful ..
greetings like.

What is a super computer??

Development of computers with advanced technology today is no longer just a dream, the history of computer development is a stepping stone in childbirth super computer.
Supercomputer is a computer that leads the world in the process of capacity, particularly speed of calculation. Supercomputers introduced in the 1960s, designed by Seymour Cray at Control Data Corporation (CDC), led the market in the 1970s until Cray quit to form his own company, Cray Research.
Quoted from kompas.com, China formally signed up as a country that has the fastest supercomputer in the world. This is the first China-made supercomputer ranked first in the list of world's fastest supercomputer, released a web site www.top500.com and beat supercomputers made in the United States.
Tianhe-1 or the mean Milky Way, the name of the supercomputer built at the National Supercomputing Centre in Tianjin, exceeding speeds of up to 2.570 petaflop or a trillion calculations per second. In the second place there is a Jaguar, a supercomputer owned by the U.S. Government in Tennessee with the 1.750 petaflop.
Perhaps among the pal anyone asks, apasih it is a petaflop?
Petaflop or FLOPS is an abbreviation of the term in English Floating Point Operations Per Second refers to the unit for the number of calculations can be performed by a computing device (in this case is a computer) to the fractions (floating point) per one unit of time. FLOPS is a unit of measurement of the speed performance of a microprocessor typically in scientific applications (scientific applications), such as to calculate / simulate the movement of Earth data in real time. For example, supercomputers have the ability to perform calculations as much as 80 million calculations of the fractions in 1 second, and can be expressed in units of 80 MFLOPS / MegaFLOPS. How sob still confused? If still confused Tanya wrote at mbah google hehehe kidding sob.
still in the quotation kompas.com, not just one supercomputer China's show of teeth. In third place were there is a supercomputer owned by China, namely nebulae, at the National Supercomputing Centre in Shenzhen. Supercomputers made ASmemang still dominate the list. Of the 500 units, more than half are in the U.S.. China recorded 42 units exceeded the number of supercomputers and Japan, France, Germany, and England. However, supercomputers in China using a chip made by U.S. companies, including Nvidia.
Purpose Supercomputer
Supercomputers are used for computation-intensive tasks like weather forecasting, climate research (including research global warming, molecular modeling, physical simulation (such as simulation of airplanes in wind tunnels, simulation of detonation of nuclear weapons, and nuclear fusion research), analisikrip, etc.. Military and science agency one of the main users of supercomputers.
Design Supercomputers
Supercomputers typically excel in kecepataan of ordinary computers using an innovative design that makes them able to perform many tasks in parallel, and also details of a complicated civil. This computer is usually specialize to a particular penghitungn, typically counting numbers, and the task is generally not a good result. Memory hierarchy are carefully designed to ensure that processors continue to receive data and instructions at any time: in fact, the difference in performance with a regular computer located in the memory hierarchy and its components. System I / Onya also designed in order to support high bandwidth.